CN115683030A - Gas turbine engagement angle measuring device and method - Google Patents

Abstract

The invention relates to a device and a method for measuring the meshing angle of a gas turbine, which comprises the gas turbine, a generator, a 3S clutch and the steam turbine which are sequentially connected, wherein a first key phase measuring device is arranged on a first connecting shaft, a second key phase measuring device is arranged on a second connecting shaft, a third key phase measuring device is arranged on the outer side of a turntable, connected with the first connecting shaft, of the 3S clutch, and a fourth key phase measuring device is arranged on the outer side of the turntable, connected with the second connecting shaft, of the 3S clutch; this application is through setting up the first key looks measuring device who detects the rotational position angle of first connecting axle, set up the second key looks measuring device who detects the rotational position angle of second connecting axle, can calculate first connecting axle according to the rotational position angle of first connecting axle, the rotational position angle of second connecting axle, the relative corner of second pivot, meshing angle when obtaining the 3S clutch meshing, can provide accurate 3S clutch meshing angle for the analysis vibration reason, reducible unit vibration shafting stability problem processing time.

Description

Measuring device and method for gas turbine meshing angle

technical field

The invention relates to gas power generation technology, in particular to a gas turbine meshing angle measuring device and method.

Background technique

Combined-Cycle Gas Turbine (CCGT), also known as gas-steam combined cycle, refers to a power generation method that combines a gas turbine and a steam turbine, and is mainly composed of a gas turbine (compressor, combustion chamber, turbine, control system and auxiliary system), waste heat boiler and steam turbine are composed of three parts. The compressor of the gas turbine inhales and compresses the air and sends it into the combustion chamber, so that the fuel (oil or natural gas) is burned to produce high-temperature and high-pressure gas, which enters the gas turbine to expand and generate power, and then the gas discharged from the gas turbine is introduced into the boiler (waste heat boiler) as the heat source of the boiler. The steam generated by the boiler is used to enter the steam turbine to generate electricity; thus, a combined cycle power generation system is formed in which the gas turbine and the steam turbine act as the prime mover; the waste heat utilization system is simple, and the output of the gas turbine accounts for a large proportion of the total output, and the steam turbine cannot be operated alone .

For example, the Chinese patent document with the authorized announcement number CN206753668U discloses "a single-shaft arrangement structure of a gas-steam combined cycle unit", the first unit and the second unit include gas turbines, generators, 3S Clutches, steam turbines and condensers. For example, the Chinese patent document with the publication number CN110284930A discloses "a Siemens 9F gas turbine combined cycle unit constant exhaust cylinder temperature clutch engagement control method", the SSS clutch is used between the unit generator and the steam turbine; Vacuum increases the installation and bearing expansion in the condenser, which can effectively reduce the vibration during unit startup.

In the gas turbine combined cycle unit mentioned above, there is a lack of detection of shafting alignment when the 3S clutch is working. During the meshing process, due to the gear transmission and structural design of the 3S clutch, the meshing gap between the rotors on both sides is random, which will cause vibration of the bearing bush. Sensitivity increases, resulting in large vibrations, and the problem of large vibrations in 3S clutches is common.

Contents of the invention

The object of the present invention is to provide a gas turbine meshing angle measurement device and method, which are used to solve the problem of large vibration of the 3S clutch in the existing gas turbine combined cycle unit.

In order to solve the above problems, the present invention provides a gas turbine meshing angle measurement device, which includes a gas turbine, a generator, a 3S clutch and a steam turbine connected in sequence, and a first bearing bush is installed on the first connecting shaft between the generator and the 3S clutch , the second bearing bush, the third bearing bush and the fourth bearing bush are installed on the second connecting shaft between the 3S clutch and the steam turbine; The first key-phase measuring device for the position angle, the second connecting shaft is provided with a second key-phase measuring device for detecting the rotational position angle of the second connecting shaft, the 3S clutch and the first connecting shaft A third key phase measurement device is provided on the outside of the connected turntable, and a fourth key phase measurement device is provided on the outside of the turntable where the 3S clutch is connected to the second connecting shaft.

The gas turbine meshing angle measuring device provided by the present invention also has the following technical features:

Further, the second bearing bush and the third bearing bush are also connected with a vibration measuring device.

Further, the first bearing bush and the fourth bearing bush are also connected to a vibration measuring device.

Further, the first key phase measuring device and the first key phase measuring device are arranged on the same side of the first connecting shaft and the second connecting shaft.

Further, the third key phase measurement device and the fourth key phase measurement device are arranged on the other side of the first connection shaft and the second connection shaft.

The present invention also provides a method for measuring the meshing angle of a gas turbine, which includes the above gas turbine meshing angle measuring device, and the meshing angle of the 3S clutch between the generator and the steam turbine is equal to the rotation position angle of the first connecting shaft and The difference between the rotation position angles of the second connection shaft.

Further, the engagement angle of the 3S clutch is α=1/2 (α1 + α3 - α2 - α4), where α1 is the rotation position angle of the first connection shaft, and α2 is the rotation position of the second connection shaft Angle, α3 is the rotation position angle of the turntable connected with the first connection shaft of the 3S clutch, and α4 is the rotation position angle of the turntable connected with the second connection shaft of the 3S clutch.

The present invention has the following beneficial effects: by setting the first key-phase measuring device for detecting the rotation position angle of the first connecting shaft, and setting the second key-phase measuring device for detecting the rotational position angle of the second connecting shaft, the Calculate the relative rotation angle of the first connecting shaft and the second rotating shaft based on the rotation position angle of the rotation position angle of the second connecting shaft, and thus obtain the meshing angle of the 3S clutch, which can provide an accurate 3S clutch meshing angle for analyzing the cause of vibration. It can reduce the time to deal with the stability of the vibration shaft system of the unit, and the vibration measurement data of the comprehensive bearing bush can be used to guide the treatment of the shaft system stability before and after the 3S clutch is engaged.

Description of drawings

Fig. 1 is a schematic structural diagram of a gas turbine meshing angle measurement device according to an embodiment of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In the embodiment of the gas turbine meshing angle measuring device of the present invention as shown in Figure 1, this gas turbine meshing angle measuring device and method set include gas turbine 10, generator 20, 3S clutch 30 and steam turbine 40 connected in sequence, generator 20 and A first bearing bush 21 and a second bearing bush 21 are installed on the first connecting shaft 11 between the 3S clutches 30, and a third bearing bush 23, The fourth bearing bush 24; the first connecting shaft 11 is provided with a first key phase measuring device 41 for detecting the rotation position angle α1 of the first connecting shaft 11, and the second connecting shaft 12 is provided with a device for detecting the second connecting shaft 12 The second key phase measuring device 42 of the rotation position angle α2, the outer side of the turntable 31 where the 3S clutch 30 is connected with the first connecting shaft 11 is provided with a third key phase measuring device 43, the 3S clutch 30 is connected to the second connecting shaft A fourth key phase measuring device 44 is arranged on the outer side of the connected turntable 32 .

In the present application, by setting the first key-phase measuring device for detecting the rotational position angle of the first connecting shaft, and setting the second key-phase measuring device for detecting the rotational position angle of the second connecting shaft, according to the rotational position angle of the first connecting shaft, Calculate the relative rotation angle of the first connecting shaft and the second rotating shaft from the rotation position angle of the second connecting shaft, thereby obtaining the meshing angle when the 3S clutch is engaged, which can provide an accurate 3S clutch meshing angle for analyzing the cause of vibration, and can reduce the vibration axis of the unit The time to deal with the system stability problem, the vibration measurement data of the comprehensive bearing bush can be used to guide the treatment of the shaft system stability before and after the 3S clutch is engaged.

In one embodiment of the present application, preferably, the second bearing bush 22 and the third bearing bush 23 are also connected with a vibration measuring device, so that the second bearing bush 22 and the third bearing bush 22 and the third bearing bush corresponding to different 3S clutch engagement angles when the 3S clutch is engaged For the vibration of the bearing bush 23, a vibration analysis model can be established. Preferably, the first bearing bush 21 and the fourth bearing bush 24 are also connected with a vibration measuring device, so that the first bearing bush 21, the second bearing bush 22, the third bearing bush 23, the first bearing bush 22, the third bearing bush 23, the For the vibration of the four-bearing bush 24, a vibration analysis model can be established to analyze the cause of the vibration of the unit.

In one embodiment of the present application, preferably, as shown in FIG. 1 , the first key phase measuring device 41 and the first key phase measuring device 42 are arranged on the same side of the first connecting shaft 11 and the second connecting shaft 12, Specifically, the first key-phase measuring device 41 and the second key-phase measuring device 42 share the same axis coordinates, which can simplify the calculation process of the 3S clutch engagement angle; preferably, the third key-phase measuring device 43, the fourth key-phase measuring device The phase measuring device 44 is arranged on the other side of the first connecting shaft 11 and the second connecting shaft 12, thereby improving the reliability of the detection of the engagement angle of the 3S clutch.

Another embodiment of the present invention also provides a gas turbine meshing angle measuring device method, the gas turbine meshing angle measuring device method includes the above-mentioned gas turbine meshing angle measuring device, the meshing angle α of the 3S clutch 30 between the generator 20 and the steam turbine 40 = α1 - α2 , α1 is the rotation position angle of the first connection shaft 11 , and α2 is the rotation position angle of the second connection shaft 12 . The application measures the rotation position angles of the first connecting shaft and the second connecting shaft by setting the first key-phase measuring device and the second key-phase measuring device, so that the meshing angle of the 3S clutch can be calculated and obtained, which can be used to analyze the cause of vibration Provide accurate 3S clutch engagement angle, which can reduce the time to deal with vibration and shafting stability problems of the unit.

In one embodiment of the present application, preferably, the engagement angle of the 3S clutch α=1/2 (α1 + α3 - α2 - α4), where α1 is the rotation position angle of the first connecting shaft, and α2 is the The rotation position angle of the second connection shaft, α3 is the rotation position angle of the turntable that the 3S clutch is connected to the first connection shaft, and α4 is the rotation position angle of the turntable that the 3S clutch is connected to the second connection shaft , thereby improving the reliability of 3S clutch engagement angle detection.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (7)

1. A gas turbine meshing angle measuring device, comprising a gas turbine, a generator, a 3S clutch and a steam turbine connected in sequence, a first bearing bush and a second bearing bush are installed on the first connection shaft between the generator and the 3S clutch, so A third bearing bush and a fourth bearing bush are installed on the second connecting shaft between the 3S clutch and the steam turbine; it is characterized in that, the first connecting shaft is provided with an angle for detecting the rotation position of the first connecting shaft The first key phase measuring device of the second connecting shaft is provided with a second key phase measuring device for detecting the rotation position angle of the second connecting shaft, and the 3S clutch is connected to the first connecting shaft A third key-phase measuring device is provided on the outer side of the turntable, and a fourth key-phase measuring device is provided on the outer side of the turntable where the 3S clutch is connected to the second connecting shaft. 2. The gas turbine meshing angle measuring device according to claim 1, characterized in that: the second bearing bush and the third bearing bush are also connected with a vibration measuring device. 3. The gas turbine meshing angle measuring device according to claim 2, characterized in that: the first bearing bush and the fourth bearing bush are also connected to a vibration measuring device. 4. The gas turbine meshing angle measuring device according to claim 1, characterized in that: the first key-phase measuring device and the first key-phase measuring device are arranged on the first connecting shaft and the second connecting shaft. same side of the axis. 5. The gas turbine meshing angle measuring device according to claim 4, characterized in that: the third key-phase measuring device and the fourth key-phase measuring device are arranged on the first connecting shaft and the second connecting shaft the other side of the axis. 6. A gas turbine meshing angle measuring method, characterized in that, comprising the gas turbine meshing angle measuring device according to any one of claims 1 to 5, the meshing angle of the 3S clutch between the generator and the steam turbine It is equal to the difference between the rotation position angle of the first connection shaft and the rotation position angle of the second connection shaft. 7. The method for measuring the engagement angle of a gas turbine according to claim 6, wherein the engagement angle of the 3S clutch is α=1/2 (α1 + α3 - α2 - α4), where α1 is the first connecting shaft α2 is the rotation position angle of the second connection shaft, α3 is the rotation position angle of the turntable connected between the 3S clutch and the first connection shaft, and α4 is the rotation position angle between the 3S clutch and the second connection shaft. Rotational position angle of the turntable connected by the connecting axis.

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