JPS6093009A - Method of moving large-sized rotary machine - Google Patents

Abstract

PURPOSE:To move a machine safely and easily at the low cost of equipment by disposing a moving table having an air jet air chamber at the lower surface thereof between the machine and a stationary support plate to form an air layer between the stationary support plate and the moving table in moving a multistage vertical split type rotary machine using air pressure. CONSTITUTION:A moving table 5 incorporating an air chamber for jetting air not shown is disposed, in engagement with guide projections 13, 14 between a compressor 1 and a stationary support plate 4 and fixed thereby bolts. Compressed air is introduced into the air chamber of the moving table 5 from a hose 10 and jetted through the air chamber between the moving table 5 and the stationary support plate 4 to form an air layer, thereby to float the compressor 1 with the moving table 5. The compressor 1 is pushed and moved. Similarly, the other machines are sequentially moved respeatedly. Thus, the machine can be moved without restrictions upon the moving distance safely and easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for moving a large rotating machine using air pressure.

A barrel-type compressor is one of the large rotating machines, and FIG. 1 shows an embodiment in which the barrel-type compressor 1 is arranged in multiple stages. Note that the gas turbine 2 shown in the figure is a drive source that drives each compressor 1 simultaneously.

The barrel type compressor 1 has a body 3a of its casing 3.
Since the dividing line between the casing and the side wall 3b is oriented vertically when the casing is viewed from the side, it belongs to a so-called vertically divided rotating machine.

By the way, when performing maintenance and inspection of the rotor etc. disposed inside the casing 3, it is naturally necessary to remove the side cover 3b from the body 3a of the casing 3. In particular, for a compressor located in the middle, it is impossible to remove the side cover 3b in its current position because the left and right machines are in the way. direction (direction perpendicular to the plane of the paper in FIG. 1), and then the side cover 3b was removed.

However, the moving method using an overhead crane has the drawback that it requires a large crane that can accommodate the total weight of the compressor 1 and a building structure that can support the crane, which increases equipment costs. The movement method using the mechanism has the disadvantage that a large movement distance cannot be achieved due to restrictions in the installation space of the mechanism.

In view of this situation, it is an object of the present invention to easily and safely operate vertically divided large-scale rotating machines arranged in multiple stages with low equipment costs, and without inconveniences such as restrictions on travel distance. The purpose is to provide a method that allows for movement.

Therefore, in the present invention, a moving table having an air chamber for blowing out air on the lower surface is interposed between the vertically divided large rotating machine arranged in multiple stages and its installation base plate, and the air chamber is pressurized. By letting air flow in, an air layer is formed between the installation base plate and the moving table, and in this state, the rotary machine is moved together with the moving table.

Hereinafter, the present invention will be described in detail with reference to the drawings. In the figures used in the following explanation, the same elements as those shown in FIG. 1 are given the same reference numerals.

In the moving method according to the present invention, as shown in FIG. 2, an example of moving a compressor located in the middle of each compressor 1 shown in FIG. A moving table 5 is interposed between the two, and the compressor is moved together with this moving table 6.

The moving table 5 has a plurality of rectangular air jets, for example, three air jets, on its bottom surface, as shown in FIG. 3 and a cross section taken along the line A-A in FIG. 3, respectively. Air chamber 6, 7
and 8, these air chambers are communicated with an air supply passage 9, and a hose 10 is connected to an opening at the end side of the passage 9. Then, a guide groove 11 is provided at the left and right end portions of the lower surface in a manner along the left and right side surfaces,
12 are formed respectively.

As shown in FIG. 2, this moving table 5 has the guide grooves 1+1. , 1> are fitted into the installation base plate 4.
It is arranged on the top and is bolted to the installation base plate 5 through bolt holes 15 provided at its peripheral edge.

When moving the compressor 1 using the moving table 5, the connection relationship between the axes of the compressor 1 and the compressors located on the left and right sides of the compressor 1 and the connection between the moving table 5 and the installation plate 4 is determined. After disconnecting the hose 10, pressurized air is supplied to the hose 10. (Then, the pressurized air stored in the air chamber for air blowout is ejected from between the movable table 5 and the installation plate 4, and an air layer is formed between them. In other words, the compressor 1 It is floated together with the moving table 5. Then, if the compressor 1 is lightly pushed in the direction perpendicular to the paper surface of FIG.
, 14 along which the compressor 1 is moved.

After inspecting and repairing the compressor 1, if pressurized air is again supplied to each of the air chambers 6, 7.8 and the compressor is pushed in the opposite direction, it can be easily returned to its original position. This compressor can be returned.

The pressurized air supply source used has a capacity that corresponds to the weight of the machine to be levitated, but unless the machine is particularly heavy, 1 is used as a supply source commonly used in various factories (7k
g/cIILG) can be applied.

By the way, when the pressurized air introduced into the air blowing chambers 6, 7.8 increases the flying height of the movable table 5 and the amount of air escaping increases, the holding pressure thereof decreases by (Fl). . Therefore, the amount of escape per unit time has its own limit, so the moving table 5 is not floated more than necessary and maintains a substantially constant and balanced flying height.

Incidentally, if necessary, it is possible to provide a pressure-retaining sealing means on the moving table 5, and FIG. 5, which is a cross-section of FIG. 2 taken along line B-B, shows an example of this sealing means. . This sealing means has grooves 16 and 17 formed in the front and rear ends of the lower surface of the moving table 5, respectively, along the front and rear sides, and seal plates 21 are inserted into these grooves via springs 18 and 19, respectively. It has a fitted structure that allows it to move up and down.

The seal plate 21 is such that the movable base 5 is connected to the installation base plate 4.
The groove 16 is formed by the upper surface of the base plate 4 when placed on top.
, 17, respectively. Then, when the moving table floats, the seal plate is applied.

21 is lowered by the springs 18 and 19 by the floating height so that its lower end surface always comes into contact with the upper surface of the installation base plate 4.

Therefore, the pressurized air supplied to the air blowing chambers 6, 7 and 8 is prevented from leaking by the seal plate 21(6) and the protrusions 13 and 14,
As a result, the compressor 1 can be floated even when a compressed air source with a small capacity is used.

The sealing means is not limited to the sealing plate side 21,
For example, a sealing material made of a flexible material such as rubber may be attached along the outside of the moving table 5.

In the above embodiment, since the center of gravity of the compressor 1 is located approximately at the center of the movable table 5, the floating blades are arranged so that the floating blades are applied almost uniformly over the entire lower surface of the movable table 5. Air chambers 6, 7, and 8 are provided for blowing out air, but when moving a machine whose center of gravity is off-center, a moving platform 5 is provided in which the air chambers for blowing air are moved toward the center of gravity. It is preferable to balance the levitation of the machine to be moved by using Of course, the air blowing chambers are not limited to the shape and number shown in the embodiments, and may include a large number of air blowing chambers having circular or square openings, etc., at predetermined intervals throughout the lower surface of the movable table 5. It may also be provided as follows.

In addition, the area of the air chamber for ejecting air is generated in proportion to the area of the upper horizontal part of the air chamber x the air pressure. It is determined by taking into consideration the pressure loss due to air escape when surfacing.

Furthermore, when moving the compressor 1, it is naturally possible to use a small winch or the like instead of pushing it manually. The present invention can be effectively applied not only to the compressor 1 described above but also to the movement of other large-sized and large-power rotating machines such as pumps and power recovery turbines, which have a power source of several tens of tons, for example.

As is clear from the embodiments described above, according to the moving method of the present invention, large and heavy rotating machines can be moved easily and safely with less equipment cost and acting force, and at the same time, the moving distance is limited. It can be moved without any Therefore, it can be effectively applied not only within a factory but also to the movement of rotating machines at installation sites outside the factory.

[Brief explanation of the drawing]

Figure 1 is a side view showing a compressor arranged in multiple stages;
The figure is a side view showing the arrangement of the moving table applied to the method of the present invention, FIG. 3 is a bottom view of the moving table, FIG. 4 is a sectional view taken along line A-A in FIG. The figure is a sectional view taken along the line BB in FIG. 2. Barrel type compressor, 4... Installation base plate, 5... Moving table, 6, 7. 8. Air chamber for blowing out air, 9... Air supply passage, 10. Pipe, 11, 12.・Guide groove, 13
, 14... Guide protrusion, 16.17... Groove, 18
, 19... Spring, addition, 21... Seal plate. b3

Claims (1)

[Claims] A movable table having an air chamber for blowing out air on the lower surface is interposed between a vertically divided large rotating machine arranged in multiple stages and its installation base plate, and pressurized air is allowed to flow into the air chamber. A method for moving a large rotating machine, characterized in that an air layer is formed between the installation base plate and the moving table, and the rotating machine is moved together with the moving table in this state.