JPH08296406A - Turbine rotor rotator - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the reaction force generated on the turbine rotor and casing side during turbine rotor rotation during regular inspection. A frame 10, which is temporarily installed so as to straddle the upper half of a coupling portion of a turbine rotor, and an elevating device 11 mounted on the frame and performing an elevating operation,
A link 14 having one end side swingably attached, a hook 15 attached to the other end side of the link, which interlocks with the lifting operation, and has a fan shape, and the inner arc side is appropriately on the outer peripheral surface of the turbine rotor shaft. The coupling bolts are attached to the coupling portion with a gap between them, and the plurality of coupling bolts are axially inserted into the coupling surface of the coupling portion at predetermined intervals in a circular shape to connect the bolts to each other. Temporary connection plate 1
9 and a temporary pawl wheel 16 attached to the temporary connection plate and having a plurality of cutout portions on the outer peripheral side that are engaged with the hook at predetermined intervals.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary type turbine rotor rotating device that applies a rotating torque to a turbine rotor during a regular inspection or the like.

[0002]

2. Description of the Related Art Turbine rotors used in thermal power plants and nuclear power plants are regularly disassembled, checked and reassembled at regular inspections of the power plants in order to confirm their soundness. FIG. 13 shows a coupled model of the turbine rotor and the generator rotor.

As the turbine rotor, rotors (low-pressure turbine rotor A, medium-pressure turbine rotor B, high-pressure turbine rotor C) suitable for the supply steam pressure are used, and each is connected by a shaft coupling D to rotate a generator rotor E. I am letting you.

At the time of regular inspection, the shaft coupling D is disassembled and the rotors are taken out of the casing for each rotor, and the bearings, rotors, blades, etc. are inspected. During the regular inspection period, it is necessary to disassemble the shaft coupling D, assemble it, center the rotor, measure the deflection of the rotor, and rotate one rotor or a single rotor.

However, the permanent equipment (turning device) of the turbine rotor cannot be used because it has been removed for regular inspection, so far, the worker has been unable to use the equipment shown in FIG.
As shown in (b), after inserting the pin 2 into the hole for the coupling bolt of the flange type shaft coupling 1, attaching the eye 4 at the end of the wire 3 to the pin 2 and winding the eye around the turbine rotor 5,
The turbine rotor 5 was rotated by pulling it up with the overhead crane 6.

When the overhead crane 6 cannot be used,
As shown in FIG. 15, the jack 8 was provided between the pin 2 and the casing 7 described above, and the turbine 8 was rotated by driving the power source 9 to extend the jack 8.

In addition, as a method using a jack, a device as shown in Japanese Utility Model Laid-Open No. 3-17203 is also found. In addition, as for permanent equipment used at times other than regular inspection, Japanese Patent Publication No.
Devices such as those disclosed in JP-A-7804 and JP-A-3-47405 are also found.

[0008]

In the conventional method using the overhead crane 6, since the wire 3 is wound around the turbine rotor 5, the turbine rotor 5 may be damaged. Further, when the overhead crane 6 rises and the turbine rotor 5 starts rotating, the wire 3 wound around the turbine rotor 5
Will be stretched.

It is necessary to remove the eye 4 at the end of the wire 3 from the pin 2 in a state where the wire 3 is fully extended, but it is necessary for the operator to remove the eye 4 at the timing, and the operator is caught in the wire 3. There is also a risk of accidents such as.

Further, since a large tension is applied to the wire 3, if the wire 3 is cut or the like during the lifting operation of the overhead crane 6, the wire 3 hits the turbine rotor 5 and the turbine rotor 5 is damaged. Scratching 5,
There is also a risk of accidents that hit workers.

On the other hand, in the method of using the jack 8, there is a high possibility that a problem such as deformation will occur due to an excessive reaction force on the casing 7 to which the jack 8 is attached. In either method of using the overhead crane 6 or the method of using the jack 8, a force is applied to one place of the coupling bolt hole of the turbine rotor 5, so that there is no scratch or indent on the inner surface of the coupling bolt hole. There is a risk that it will stick or the hole diameter will expand.

That is, conventionally, an operator manually attaches a component to the coupling bolt portion of the turbine rotor 5 and tries to give a rotational torque to the turbine rotor 5 through the component, so naturally the coupling is performed. The bolt holes and the fitting between the turbine rotor 5 and the parts to be attached become loose, and the contact parts between these temporarily installed parts and the turbine rotor 5 can only obtain point contact or line contact.
As a result, the Hertzian stress at the time of contact becomes high, and there is a very high possibility that scratches or indentations will be formed on the turbine rotor 5 side.

As shown in FIG. 16, in the flange type shaft coupling 1 of the turbine rotor 5, when the coupling bolt hole and the load point A of the pin 2 are separated from each other in the axial direction of the turbine rotor 5, the pin 2 Bending moment occurs in
The stress distribution in the holes for the coupling bolts becomes uneven, and there are places where the stress is locally high, and scratches and indentations easily occur.

The present invention has been made in view of the above circumstances, and in a temporary device for mechanization of the work of rotating the turbine rotor at the time of regular inspection, a reaction occurring on the turbine rotor and casing side when the turbine rotor rotates An object is to provide a turbine rotor rotating device that reduces force.

[0015]

Therefore, first, in order to achieve the above-mentioned object, according to the turbine rotor rotating apparatus of the invention of claim 1, the turbine rotor rotating device extends over the upper half of the coupling portion of the turbine rotor. A frame that is temporarily installed, an elevating device that is mounted on the frame, and an elevating part moves up and down in the direction of the coupling part, and one end side of the elevating part of the elevating device is swingably attached via a spherical bearing. A link, a hook attached to the other end of the link, which interlocks with the lifting operation of the lifting unit, and has a fan shape, and the inner arc side has an appropriate gap on the outer peripheral surface of the turbine rotor shaft. A plurality of coupling bolts attached to the coupling portion of the turbine rotor and inserted in the coupling surface of the coupling portion of the turbine rotor in a circular shape at predetermined intervals in the axial direction A temporary type connection plate for connecting the Tsu pulling bolts each other, attached to the temporary type connection plate,
A plurality of cutout portions are provided on the outer peripheral side at predetermined intervals to be engaged with the hooks, and the cutout portions are engaged with the hooks so that rotational torque is intermittently applied to the turbine rotor. And a temporary type ratchet for giving.

According to the invention of claim 2, claim 1
In the turbine rotor rotating device described above, a temporary pin having substantially the same shape as a nut of the coupling bolt is used instead of the coupling bolt of the turbine rotor.

Further, according to the invention of claim 3, in the turbine rotor rotating device according to claim 1 or 2, the coupling torque for applying the rotational torque applied to one of the temporary ratchet wheels to the adjacent coupling bolts. In order to be able to transmit to other coupling bolts other than the above, the temporary connection plate and the temporary ratchet wheel are reduced over the entire circumference of the coupling part so that the gap between the adjacent temporary ratchet wheels becomes small. It is characterized in that they are arranged at a predetermined interval.

Further, according to the invention of claim 4, in the turbine rotor rotating device of claim 1 or 2, the temporary connecting plate and the temporary ratchet wheel are circles of a coupling portion of the turbine rotor. It is characterized in that they are displaced from each other by a predetermined distance over the entire circumference, and are arranged with a predetermined distance so that the gap between the adjacent temporary ratchet wheels is reduced.

Further, according to the invention of claim 5, in the turbine rotor rotating device according to any one of claims 1 to 4, the force applied to the temporary ratchet wheel when the turbine rotor is rotating is applied to the turbine rotor. A plate that is in contact with the turbine rotor shaft is attached to the temporary pawl wheel so that the temporary pawl wheel can be disposed at a position distant from the coupling bolt in the axial direction of the turbine rotor while being supported by the shaft side surface. .

Further, according to the invention of claim 6, the turbine rotor is continuously rotated by changing the timing of the reciprocating motion of the hook provided in each turbine rotor rotating device. 5 any 1
A plurality of turbine rotor rotating devices according to the invention are installed in the axial direction of the turbine rotor.

Further, according to the invention of claim 7, in the turbine rotor rotating device according to any one of claims 3 to 5, a plurality of the elevating devices on the frame and elevating parts of the elevating devices. A link, one end of which is swingably attached via a spherical bearing, and a hook, which is attached to the other end of the link, is attached to the other end of the link and interlocks with the lifting operation of the lifting unit. Further, according to the invention of claim 8, in the turbine rotor rotating device according to claim 6 or 7, a plurality of sensors for respectively detecting the forces loaded on the plurality of hooks, and the plurality of sensors. A plurality of comparators, each of which is connected to, and outputs a signal when a load force detected by each of the plurality of sensors is lower than a reference load force; A control device that sequentially operates the elevating units of the plurality of elevating devices according to signals output from the plurality of comparators to automatically control the turbine rotor to continuously rotate.

[0022]

According to the invention of claim 1, when the force for rotating the turbine rotor acts on the temporary ratchet wheel, the force is transmitted from the temporary ratchet wheel to the plurality of coupling bolts through the temporary connecting plate. Therefore, the force applied per coupling bolt is reduced, and as a result, the turbine rotor is not damaged.

According to the second aspect of the present invention, the provisional pin having substantially the same shape as the nut of the coupling bolt is used in place of the coupling bolt, so that the coupling bolt after the coupling bolt is removed by regular inspection work or the like is used. Rotational torque can also be applied to the turbine rotor.

According to the third and fourth aspects of the present invention, the temporary connecting plate and the temporary ratchet wheel are spaced at a predetermined distance so that the gap between the temporary ratchet wheels adjacent to each other on the entire circumference of the coupling becomes small. Is arranged, the rotational reaction force of the turbine rotor can be transmitted to the plurality of adjacent temporary pins or coupling bolts.

According to the fifth aspect of the present invention, the plate that is in contact with the shaft of the turbine rotor is attached to the temporary ratchet wheel so that the rotational reaction force of the turbine rotor is transmitted not only to the coupling bolt but also to the side surface of the turbine rotor shaft. It is possible to reduce the individual load received by the temporary pins and the like.

According to the sixth aspect of the present invention, a plurality of turbine rotor rotating devices are installed in the axial direction of the turbine rotor, and the reciprocating timings of the hooks provided in the respective turbine rotor rotating devices are made different, so that continuous operation is achieved. The turbine rotor can be effectively rotated.

According to the invention of claim 7, in the turbine rotor rotating device according to any one of claims 3 to 5, a plurality of lifting devices are provided on the frame, and a spherical bearing is provided in the lifting part of the lifting device. Since one end is swingably attached, and the other end of the link is attached with a hook that interlocks with the lifting operation of the lifting unit, the lifting units of multiple lifting devices are lifted. The turbine rotor can be continuously rotated by changing the timing of hooks that are linked to the operation.

According to the eighth aspect of the present invention, when the control device causes the load force applied to the hook to become lower than the reference load force, a plurality of lifting devices are output based on the signal output from the comparator. Since the raising and lowering part of is sequentially operated, the turbine rotor can be automatically continuously rotated.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A turbine rotor rotating apparatus according to an embodiment of the present invention will be described below with reference to the drawings. <First Embodiment> FIG. 1 shows the configuration of a turbine rotor rotating apparatus according to a first embodiment of the present invention. (Embodiment corresponding to the invention of claim 1) FIG. 2 is a sectional view of the turbine rotor coupling portion of the turbine rotor rotating apparatus in the embodiment, and FIG. 3 is seen from the X direction in FIG. The arrow view is shown. In each example described below,
The same members as those in FIGS. 13 to 16 will be described with the same reference numerals.

As shown in FIG. 1, the portal frame 10 is mounted on the casing (right) 7a and the casing (left) 7b of the turbine rotor 5 so as to straddle the turbine rotor 5.
A mechanical jack 11 is mounted on the portal frame 10. The rod 12 of the mechanical jack 11 is the frame 10
Through a hole that penetrates the frame 10 and projects below the lateral beam of the frame 10.

A side plate A14a and a side plate B14b are provided at the tip of the rod 12 via a spherical bearing 13.
Are attached to form a link mechanism. The lower ends of the side plates A14a and B14b are connected by a lifting pin 15.

The lifting pin 15 is mounted at a position where it is caught by the temporary type ratchet wheel 16 when the rod 12 of the mechanical jack 11 descends, and a hook is formed by the side plate A 14a, the side plate B 14b and the lifting pin 15. ing.

On the turbine rotor 5 side, a coupling bolt nut 17 and a coupling bolt 18 are fastened, and a temporary type for coupling a plurality of coupling bolts in a manner of covering the two coupling bolt nuts 17 Attach the connecting plate 19.

The hexagonal bolt 2 is attached to the temporary connecting plate 19.
A temporary type ratchet wheel 16 having a shape in which a hook is hooked only in the rotational direction of the turbine rotor 5 by 1 is attached, and a rectangular key inserted between the above two nuts 17 for coupling bolts. Torque is transmitted by 20.

The hexagon bolt 21 is used for the temporary type ratchet wheel 16
Since it is used only for fixing the turbine rotor 5 axis direction,
There is no problem even if it is thin. Next, the operation of the turbine rotor rotating device in this embodiment will be described.

When the rod 12 of the mechanical jack 11 is pushed down, the side plate A14a, the side plate B14b and the side plate A14a, which are attached via the spherical bearing 13, and the lifting pin 15 connecting the side plate B14b are also lowered together.

When the temporary hook wheel 16 is located below the lifting pin 15, the lifting pin 15 is mounted on the side plate A 14a and the side plate B 14b by the spherical bearing 13.
Since it is attached so as to be capable of swinging through, it slides on the inclined surface of the temporary ratchet wheel 16 shown by Y in FIG.
Fit into the recess shown in.

When the mechanical jack 11 is pulled up from the state where the lifting pin 15 is located in the recess Z of the temporary type ratchet wheel 16, the lifting pin 15 and the temporary type ratchet wheel 16 come into contact with each other, and the pulling force is applied to the turbine rotor. It is loaded in the circumferential direction.

The force applied to the temporary ratchet wheel 16 is applied to the key 2
It is transmitted to the temporary connecting plate 19 via 0, and further, the coupling bolt nut 17, the coupling bolt 18
Is transmitted as a rotational torque of the turbine rotor 5.

While the jack 11 moves linearly, the point where the temporary hook 16 and the hook contact each other makes a circular motion with the turbine rotor 5 as the center of rotation. The positional deviation between the two is absorbed by a link provided between the jack 11 and the hook. Further, the core between the turbine rotor 5 and the turbine rotor rotating device may be displaced due to the installation accuracy of the turbine rotor rotating device, but the positional deviation between the two is absorbed by the spherical bearing provided between the jack 11 and the link. .

Therefore, according to the turbine rotor rotating apparatus of the present embodiment, the turbine rotor 5 of the existing thermal power and hydroelectric power station is temporarily installed during the regular inspection without modifying the main engine side, so that only during the regular inspection work. A turbine rotor rotating device capable of rotating the turbine rotor 5 can be provided.

That is, to fix the portal frame 10 on the casing (right) 7a and the casing (left) 7b,
The fastening bolts on the upper half of the casing may be used, and the temporary connecting plate 19 may be fixed on the coupling bolt nut 1.
All you have to do is insert it in 7.

Further, since the temporary connecting plate 19 is inserted into the two coupling bolt nuts 17, the temporary ratchet wheel 16 does not rotate around the coupling bolt nuts 17 and the temporary ratchet wheel 16 is not rotated. The pitch circle of 16 can be made larger than the pitch circle of the coupling bolt 18, and the pulling force with respect to the required rotation torque of the turbine rotor 5 can be reduced.

Further, when a force for rotating the turbine rotor is applied to the temporary ratchet wheel 16, the force is transmitted from the temporary ratchet wheel 16 to the plurality of coupling bolts 18 via the temporary link plate 19, so that the cup The force applied per ring bolt is reduced, so that the turbine rotor 5 is not damaged. <Second Embodiment> FIG. 4 shows a sectional view of a turbine rotor coupling portion of a turbine rotor rotating apparatus according to a second embodiment of the present invention. (Embodiment corresponding to the invention of claim 2) That is, in this embodiment, as shown in the figure, instead of the coupling bolt nut 17, a temporary pin having a substantially same shape as the nut of the coupling bolt is used. 22
The turbine rotor rotating device of this embodiment is constructed by inserting the turbine rotor 5 into the coupling bolt hole.

As a result, it is possible to rotate even the turbine rotor in which the coupling bolt has been disassembled and removed by regular observation work or the like. <Third Embodiment> In the third embodiment of the present invention (the embodiment corresponding to the invention of claim 3), the temporary connection plate 19 and the temporary ratchet wheel 16 are connected to the coupling portion of the turbine rotor 5. Provided is a turbine rotor rotating device capable of rotating the turbine rotor 5 from an arbitrary position by forming a mounting ring shape on the entire circumference.

FIG. 5 is a front view of a turbine rotor rotating device according to a third embodiment of the present invention, FIG. 6 is a side view of the turbine rotor rotating device of the same embodiment, and FIGS. 7 (a) and 7 (b).
FIG. 2 shows a front view and a sectional view of a coupling of a turbine rotor rotating device in the same embodiment.

The configuration of the turbine rotor rotating apparatus according to the third embodiment of the present invention will be described below with reference to the drawings. The support (right) 23 is attached to the casing (right) 7a, and the support (left) 24 is attached to the casing (left) 7b.

At the upper part of the support (right) 23, the rotary shaft 2
5 is mounted vertically, and a horizontal beam 26 is mounted rotatably around the rotary shaft 25. When the transverse beam 26 is rotated, the turbine rotor can be removed outside the casing while the turbine rotor rotating device is installed.

A hydraulic cylinder 27 is attached to the lateral beam 26.
Is installed. The hydraulic cylinder 27 is arranged so that the rod faces upward on the lateral beam 26 so that the pressure receiving area becomes large at the time of pulling up which requires a large force.

An upper bracket 29 is attached to the rod tip of the hydraulic cylinder 27 via a spherical washer 28. The spherical washer 28 includes the hydraulic cylinder 27 and the LM.
Even if the parallelism of the shaft 31 is deviated, the hydraulic cylinder 27
This is to prevent unreasonable force from being applied to.

Upper bracket 29 and lower bracket 30
Are connected by two LM shafts 31,
The shaft 31 is guided by an LM guide 32 attached to the lateral beam 26, and is vertically moved as the hydraulic cylinder 27 reciprocates.

The side plate A14a is attached to the lower bracket 30 via the spherical bearing 13 as in the above-described embodiment.
The side plate B14b and the lifting pin 15 are attached to form a link mechanism and a hook.

The temporary pins 22 are inserted into the coupling bolt holes of the turbine rotor 5, and the two temporary pins 22 are covered with the temporary connecting plate 19. (The same applies when a nut for a coupling bolt is used instead of the temporary pin 22.) The temporary connecting plate 19 is a temporary type so that torque is transmitted through two torque transmitting pins 33. The ratchet wheel 16 is attached. The temporary pin 22 is inserted into the turbine rotor 5, the temporary connecting plate 19 is inserted into the temporary pin 22, and the temporary pinion wheel 16 is inserted into the torque transmitting pin 33 by an employee or the like in order. It is carried out by attaching to.

Only the torque transmitting pin 33 is assembled to the temporary connecting plate 19 before being attached to the turbine rotor 5 in advance. The respective fittings are loose so that the above members can be easily inserted. Therefore, in order to prevent the hexagonal bolt 21 from falling off in the axial direction, the hexagonal bolt 21 is tightened from the temporary ratchet wheel 16 to the temporary pin 22 side.

Thus, the temporary pin 22 and the temporary connecting plate 1
9, the torque transmitting pin 33, and the temporary ratchet 16 are arranged on the entire circumference of the coupling portion of the turbine rotor 5. At this time, the gap δ between the adjacent temporary ratchet wheels 16 is set to a narrow dimension of about 2 to 3 mm.

Next, the operation of this embodiment will be described.
When hydraulic pressure is supplied to the hydraulic cylinder 27 and the rod extends, the upper bracket 29 moves upward. as a result,
The lower bracket 30 is pulled up via the LM shaft 31 connected to the upper bracket 29, and the side plates A14a, side plates B14b, and lifting pins 15 attached to the lower bracket 30 are pulled up.

The LM shaft 31 is guided by the LM guide 32, and the lifting pin 15 is provided with a temporary type ratchet wheel 16.
Receives a moment that occurs when you pull up. Spherical bearing 13, side plate A14a, side plate B1
4b, the operation of the lifting pin 15 is the same as that of the above-mentioned embodiment. Also, the temporary pin 2 attached to the turbine rotor 5 side
2. The functions of the temporary freezing plate 19 and the temporary ratchet wheel 16 are similar to those of the above-described embodiment, but the torque transmission pin 33 is used for torque transmission between the temporary connecting plate 19 and the temporary ratchet wheel 16. This is different from the above embodiment.

When a force is applied to the temporary ratchet wheel 16 from the hoisting pin 15, the temporary ratchet wheel 16 receives the force due to the play between the coupling bolt, the temporary connecting plate, the temporary connecting plate, and the temporary ratchet wheel. Moves slightly in the circumferential direction. At this time, since the gap 8 between the temporary type ratchet wheels 16 is made small as described above, the adjacent temporary type ratchet wheels 16 come into contact with each other, and a wide range is provided via the adjacent temporary type ratchet wheels 16. The rotational reaction force of the turbine rotor can be transmitted to the temporary pin 22.

When only one temporary type ratchet wheel 16 is attached to the turbine rotor 5 as in the above embodiment,
The number of pawls provided on the temporary pawl wheel 16 (3 in FIG. 7)
Only the individual) can apply a rotational force by pulling up with the lifting pin 15, and when there are no claws to be caught on the lifting pin 15, it is necessary to change the mounting positions of the temporary connecting plate 19, the temporary claw wheel 16 and the like. However, in the present embodiment, the turbine rotor 5 is arranged from the arbitrary position because it is arranged on the entire circumference.
Can be rotated. <Fourth Embodiment> FIG. 8 shows a sectional view of a turbine rotor coupling portion of a turbine rotor rotating apparatus according to a fourth embodiment of the present invention. (Embodiment corresponding to the invention of claim 4) As shown in the figure, the difference from the above-mentioned third embodiment is that the mounting pitch of the temporary freezing plate 19 and the temporary ratchet wheel 16 is shifted by a half pitch. It is to install.

That is, the temporary ratchet wheel 16 is attached to the torque transmitting pin 33 attached to the adjacent temporary connecting plates 19 so as to straddle the two temporary connecting plates 19.

By adopting such a configuration,
The force applied to one temporary ratchet wheel 16 causes the temporary connecting plate 1 to move.
Since 9 and the temporary type ratchet wheel 16 become a ring-shaped one-piece component via the torque transmitting pin 33, the force is transmitted to all of the temporary pins 22 inserted into the holes for the coupling bolts, and each one It is possible to reduce the force applied to.

Further, the temporary type ratchet wheel 16 and the temporary type connecting plate 19
Are assembled in a ring shape, it is possible to prevent the turbine rotor 5 from falling off even if it moves in the axial direction.

Therefore, parts such as a temporary connecting plate and a temporary ratchet are attached outside the casing to the turbine rotor that has been pulled out from the casing and inspected, and the turbine rotor is mounted on the turbine rotor in that state. It is possible to lift and suspend in a casing.

Therefore, the temporary connecting plate, the temporary ratchet and the like can be easily attached, and the working efficiency is improved. <Fifth Embodiment> FIGS. 9A and 9B show a fifth embodiment of the present invention.
The top view and sectional drawing of the coupling part of the turbine rotor rotating device which concern on the Example of this are shown. (Embodiment corresponding to the invention of claim 5) As shown in the figure, the difference between this embodiment and the above-mentioned fourth embodiment is that the length of the torque transmission pin 33 is increased and The plate 34, which is in contact with the shaft side surface of the turbine rotor 5, is attached to the ratchet wheel 16.

When the temporary ratchet wheel 16 can be mounted only at a position separated in the axial direction of the turbine rotor 5,
When the force of the temporary ratchet 16 is applied, the plate 34 contacts the axial side surface of the turbine rotor 5, and a reaction force that stops the rotation of the temporary connecting plate 19 and the temporary ratchet 16 around the temporary pin 22 is generated.

Therefore, by mounting the plate 34 in contact with the shaft of the turbine rotor 5 on the temporary type ratchet wheel 16, the rotational reaction force of the turbine rotor 5 is transmitted not only to the coupling bolt but also to the side surface of the turbine rotor shaft and the temporary pin. It is possible to reduce the individual load that 22 and the like receive. <Sixth Embodiment> Next, a turbine rotor rotating device according to a sixth embodiment of the present invention will be described. (Embodiment corresponding to the invention of claim 6) As shown in FIG. 13, in a turbine rotor used in a thermal power and nuclear power plant, a plurality of turbine rotors are connected by a shaft coupling D.

At one location of this shaft coupling D, the turbine rotor rotating device described in the above embodiment is installed at a plurality of locations one by one. That is, the turbine rotor rotating device is
Rotational torque is applied to the turbine rotor from the turbine rotor rotating device only when the ratchet wheel is hooked by the hook, and after the hooking operation is complete, the turbine rotor is able to rotate until the hook wheel returns to the hooking start position. If there is no, it will stop immediately and can only be rotated intermittently.

Therefore, by changing the timing of pulling up the hooks of the above-mentioned turbine rotor rotating devices installed in plural units,
If the turbine rotor 5 is operated so as to alternately apply the rotational torque, the turbine rotor 5 can be continuously rotated although the rotation is intermittent. <Seventh Embodiment> Next, a turbine rotor rotating device according to a seventh embodiment of the present invention will be described. (Embodiment corresponding to the invention of claim 7) FIGS. 10A and 10B are a front view and a side view of a turbine rotor rotating apparatus according to a seventh embodiment of the present invention.

That is, in the seventh embodiment of the present invention, another hydraulic cylinder 27 is attached to the lateral beam 26 of the turbine rotor rotating device, and the same construction as that described in the third embodiment is obtained. Upper bracket 29, LM
Shaft 31, LM guide 32, lower bracket 30,
A set of spherical bearing 13, side plate A 14a, side plate B 14b, and lifting pin 15 is attached.

By adopting such a configuration,
By pulling up the temporary ratchet 16 with the hook on the right side, and while pulling down the hook after the pulling up, by alternately pulling up or down the left and right hooks to push down the ratchet wheel on the left hook, The turbine rotor 5 can be continuously rotated. <Eighth Embodiment> Next, a turbine rotor rotating device according to an eighth embodiment of the present invention will be described. (Embodiment corresponding to the invention of claim 8) For example, when a torque is applied to a turbine rotor used in a thermal power plant or a nuclear power plant by a ratchet wheel by a turbine rotor rotating device, a sliding bearing portion used. When the force is not supplied due to the relationship between the frictional force and the GD2 of the turbine rotor, the rotation is almost stopped and the rotation is interrupted.

The circumferential force supplied to the turbine rotor by the turbine rotor rotating device has a waveform-like characteristic shown in FIG. 11 based on the relationship between the static frictional force and the dynamic frictional force of the slide bearing. In the section a shown in FIG. 11, the force is only the weight of the hook portion until the hook is caught by the ratchet wheel.

The section b is a section in which the hook is caught by the ratchet wheel to rotate the turbine rotor. When the turbine rotor starts to rotate, a huge force is momentarily needed due to the influence of static friction.

The section c is a section in which only the weight of the hook portion is applied as a force up to the stroke end of the jack after the hook is disengaged from the ratchet wheel. FIG. 12 shows the configuration of the turbine rotor rotating device according to the eighth embodiment of the present invention.

As shown in the figure, a turbine rotor rotating device A35 and a turbine rotor rotating device B36 are separately installed in the axial direction of the turbine rotor 5, and each is equipped with a hydraulic cylinder A.
37, hook A39, hook B with hydraulic cylinder B38
40 is operated.

A load cell A41 and a load cell B42 for detecting the respective loaded forces are attached to the hook A39 and the hook B40, and the signal of each load cell is amplified by the amplifier A4.
3. Connected to the comparator A45 and the comparator B46 via the amplifier B44.

Comparators A45 and B46
Is connected so as to be input to the sequencer 47. The hydraulic cylinder A37 can be switched by a solenoid valve A48, and the hydraulic cylinder B38 can be switched by a solenoid valve B49.

Comparators A45 and B46
Is a load that is set between the load applied by the hook's own weight and the load applied when the turbine rotor is rotating, and the load measured after the start of the turbine rotor is less than the set load. The signal is turned on when it becomes.

Next, the operation of the turbine rotor rotating device of this embodiment will be described. First, the sequencer 47 sends a signal to the solenoid valve A48 and the solenoid valve B49 so as to lower both the hydraulic cylinder A37 and the hydraulic cylinder B38, thereby preparing the preparation system.

When a separately provided rotation start SW (not shown and connected to the sequencer 47) is turned on, the sequencer 47 outputs a signal for switching the hydraulic pressure to the solenoid valve A48 so as to raise the hydraulic cylinder A37. It

Then, the hook A39 is caught by the ratchet wheel, and the turbine rotor 5 starts to rotate. Load cell A
41 and the amplifier A43 show the waveform of the force as shown in FIG. 11, and when the hook A39 continues to rise and disengages from the ratchet wheel,
The comparator A45 detects the decrease in force, and the sequencer 4
Signal to 7.

Receiving this signal, the sequencer 47 outputs a signal for switching the hydraulic circuit so as to lower the hydraulic cylinder A37 to the solenoid valve A48, and a signal for switching the hydraulic circuit so as to raise the hydraulic cylinder A38 to the solenoid valve B49. Output.

The hook B40 is caught by the ratchet wheel, and the turbine rotor 5 is continuously rotated. When the hook A40 continues to rise and disengages from the ratchet wheel, the comparator A46 detects a decrease in force and sends a signal to the sequencer 47. Sequencer 47
This time, on the contrary, a signal is output so as to raise the hydraulic cylinder A37 and lower the hydraulic cylinder B38. If a flow rate adjusting valve (not shown) is provided in the hydraulic circuit so that both the hydraulic cylinder A37 and the hydraulic cylinder B38 operate at a higher cylinder speed than the ascent goes down, the turbine rotor can be continuously operated. It becomes possible to rotate.

In the above embodiment, it is possible to use a pressure switch for detecting the hydraulic pressure supplied to the hydraulic cylinder instead of the load cell. Further, although the turbine rotor is rotated by the ratchet wheel and the hook, it is conceivable to transmit the rotational torque to the turbine rotor by the chain and the sprocket.

[0084]

According to the invention of claim 1, when the force for rotating the turbine rotor acts on the temporary ratchet wheel, the force is transmitted from the temporary ratchet wheel to the plurality of coupling bolts through the temporary connecting plate. Therefore, the force applied per coupling bolt is reduced, and as a result, the turbine rotor is not damaged.

According to the second aspect of the present invention, the provisional pin having substantially the same shape as the nut of the coupling bolt is used in place of the coupling bolt, so that the coupling bolt after the coupling bolt is removed by regular inspection work or the like is used. Rotational torque can also be applied to the turbine rotor.

According to the third and fourth aspects of the invention, the temporary connecting plate and the temporary ratchet wheel are spaced at a predetermined interval so that the gap between the temporary ratchet wheels adjacent to each other on the entire circumference of the coupling becomes small. Is arranged, the rotational reaction force of the turbine rotor can be transmitted to the plurality of adjacent temporary pins or coupling bolts.

According to the fifth aspect of the present invention, by mounting the plate contacting the shaft of the turbine rotor on the temporary ratchet wheel, the rotational reaction force of the turbine rotor is transmitted not only to the coupling bolt but also to the side surface of the turbine rotor shaft. It is possible to reduce the individual load received by the temporary pins and the like.

According to the sixth aspect of the present invention, a plurality of turbine rotor rotating devices are installed in the axial direction of the turbine rotor, and the reciprocating motions of the hooks provided in the respective turbine rotor rotating devices are set at different timings. The turbine rotor can be effectively rotated.

According to the invention of claim 7, in the turbine rotor rotating device according to any one of claims 3 to 5, a plurality of lifting devices are provided on the frame, and a spherical bearing is provided in the lifting part of the lifting device. Since one end is swingably attached, and the other end of the link is attached with a hook that interlocks with the lifting operation of the lifting unit, the lifting units of multiple lifting devices are lifted. The turbine rotor can be continuously rotated by changing the timing of hooks that are linked to the operation.

According to the eighth aspect of the invention, when the control device causes the load force applied to the hook to fall below the reference load force, a plurality of lifting devices are output based on the signal output from the comparator. Since the raising and lowering part of is sequentially operated, the turbine rotor can be automatically continuously rotated.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a turbine rotor rotating device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a turbine rotor coupling portion of the turbine rotor rotation device according to the first embodiment.

FIG. 3 is a partial arrow view of a turbine rotor coupling portion of the turbine rotor rotation device according to the first embodiment.

FIG. 4 is a sectional view of a turbine rotor coupling portion of a turbine rotor rotation device according to a second embodiment of the present invention.

FIG. 5 is a front view of a turbine rotor rotating device according to a third embodiment of the present invention.

FIG. 6 is a side view of the turbine rotor rotating device according to the embodiment.

FIG. 7 is a sectional view of a coupling of the turbine rotor rotating device according to the embodiment.

FIG. 8 is a sectional view of a turbine rotor coupling portion of a turbine rotor rotation device according to a fourth embodiment of the present invention.

9A and 9B are a top view and a cross-sectional view of a turbine rotor rotating device coupling portion according to a fifth embodiment of the present invention.

FIG. 10 is a diagram showing a front view and a side view of a turbine rotor rotating device according to a seventh embodiment of the present invention.

FIG. 11 is a waveform diagram showing characteristics of a force generated in the hook portion when the turbine rotor of the turbine rotor rotating device according to the eighth embodiment of the present invention is rotated.

FIG. 12 is a diagram showing a configuration of a turbine rotor rotation device in the embodiment.

FIG. 13 is a diagram showing a conventional coupled model of a turbine rotor and a generator rotor.

FIG. 14 is an explanatory diagram of a turbine rotor rotating device that rotates a turbine rotor by a conventional overhead crane.

FIG. 15 is an explanatory diagram of a turbine rotor rotating device that rotates a turbine rotor with a conventional jack.

FIG. 16 is an explanatory diagram illustrating a positional relationship between a coupling bolt hole and a pin in a conventional turbine rotor rotating device.

[Explanation of symbols]

1 ... Flange type shaft coupling, 2 ... Pin, 3 ... Wire, 4 ... Eye, 5 ... Turbine rotor, 7, 7a, 7b ... Casing, 10 ... Gate frame, 11 ... Mechanical jack, 13
... Spherical bearings, 14a, b ... Side plates, 15 ... Lifting pins, 16 ... Temporary ratchets, 17 ... Nuts for coupling bolts, 18 ... Coupling bolts, 19 ... Temporary connecting plates, 20 ... Keys, 22 ... Temporary pin, 27 ... Hydraulic cylinder, 31 ... LM shaft, 32 ... LM guide, 33 ... Torque transmission pin, 34 ... Plate, 41, 42 ... Load cell, 43, 44 ... Amplifier, 45, 46 ... Comparator, 47 ... Sequencer , 48, 49 ... Solenoid valve.

Claims (8)

[Claims] 1. A frame that is tentatively installed so as to straddle the upper half of a coupling portion of a turbine rotor, and an elevating device that is mounted on the frame and that elevates and lowers in the direction of the coupling portion. A link whose one end side is swingably attached to the elevating part of the elevating device via a spherical bearing, a hook which is attached to the other end side of the link and which interlocks with the elevating operation of the elevating part, and has a fan shape. The inner arc side is attached to the coupling portion of the turbine rotor with an appropriate gap on the outer peripheral surface of the turbine rotor shaft, and has a predetermined circular interval on the coupling surface of the coupling portion of the turbine rotor. Of the coupling bolts inserted in the axial direction, the temporary connection plate connecting the coupling bolts to each other, and the temporary connection plate attached to the temporary connection plate with a predetermined interval on the outer peripheral side. And a plurality of notches that are engaged with the hooks, and the notches are engaged with the hooks so that the turbine rotor is intermittently provided with a rotational torque, and A turbine rotor rotating device comprising: 2. A temporary pin having substantially the same shape as a nut of the coupling bolt is used in place of the coupling bolt of the turbine rotor.
The described turbine rotor rotating device. 3. The temporary connection plate and the temporary pawl so that the rotational torque applied to one of the temporary pawl wheels can be transmitted to a coupling bolt other than the adjacent coupling bolts. The turbine rotor according to claim 1 or 2, wherein the wheels are arranged on the entire circumference of the coupling portion with a predetermined space therebetween so that a space between the adjacent temporary ratchet wheels becomes small. Rotating device. 4. The temporary connecting plate and the temporary ratchet wheel are displaced by a predetermined distance from each other over the entire circumference of the coupling portion of the turbine rotor, and a predetermined gap is provided between adjacent temporary ratchet wheels. The turbine rotor rotating device according to claim 1 or 2, wherein the turbine rotor rotating device is arranged with a space. 5. The force applied to the temporary ratchet wheel when the turbine rotor is rotated is supported by the side surface of the turbine rotor shaft, and the temporary ratchet wheel is disposed at a position away from the coupling bolt in the axial direction of the turbine rotor. The turbine rotor rotating device according to any one of claims 1 to 4, wherein a plate that is in contact with the turbine rotor shaft is attached to the temporary ratchet wheel so as to be possible. 6. The invention according to claim 3, wherein the turbine rotor is continuously rotated by changing the timing of the reciprocating motion of the hook provided in each turbine rotor rotating device. A turbine rotor rotating device, wherein a plurality of turbine rotor rotating devices are installed in the axial direction of the turbine rotor. 7. The turbine rotor rotating device according to claim 3, wherein a plurality of the elevating devices are provided on the frame, and one end side of the elevating device is oscillated via spherical bearings. A turbine rotor rotating device comprising: a link movably attached to each of the links; and a hook attached to the other end of the link, the hook interlocking with a lifting operation of the lifting unit. 8. The turbine rotor rotating device according to claim 6 or 7, wherein a plurality of sensors for respectively detecting the forces applied to the plurality of hooks, and a plurality of sensors respectively connected to the plurality of sensors are provided. A plurality of comparators that output a signal when the load force detected by each of the sensors is lower than the reference load force, and the elevators of the elevators are sequentially operated by the signals output from the comparators. And a control device for automatically controlling the turbine rotor to continuously rotate, the turbine rotor rotating device.