CN111981956B - Device and method for factory testing of parallelism of bearing of steam turbine generator - Google Patents
Device and method for factory testing of parallelism of bearing of steam turbine generator Download PDFInfo
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- CN111981956B CN111981956B CN202010702726.5A CN202010702726A CN111981956B CN 111981956 B CN111981956 B CN 111981956B CN 202010702726 A CN202010702726 A CN 202010702726A CN 111981956 B CN111981956 B CN 111981956B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention relates to the field of testing of bearings of turbonators, aims to solve the problem that the parallelism test of the bearings of the turbonators cannot be well realized in the prior art, and provides a factory testing device and method for the parallelism of the bearings of the turbonators, wherein the testing method comprises the following steps: the method comprises the following steps: under the condition of not starting a high-pressure oil system of the turbonator, applying a set external force to the shaft end of the generator rotor to axially move the generator rotor for a set distance so as to simulate the axial displacement of the generator rotor caused by thermal expansion and cold contraction of a shaft system, thereby simulating the state of damage of the parallelism of a bearing of the generator; step two: starting a high-pressure oil top system, recording the pressure of a high-pressure oil film and judging the damaged degree of the parallelism of the bearing according to the variable quantity of the pressure: the larger the oil film pressure change is, the larger the bearing parallelism is destroyed. The self-aligning bearing test device has the advantages of better solving the problem of factory test of the self-aligning capability of the bearing and avoiding the operation risk of a power plant caused by using the bearing with the self-aligning capability.
Description
Technical Field
The invention relates to the field of testing of bearings of turbonators, in particular to a device and a method for testing parallelism of bearings of turbonators in a factory.
Background
The bearing parallelism refers to the parallel condition of the inner surface of the bearing bush and the shaft journal of the rotating shaft in the axial direction. In order to ensure the safe operation of the generator, the bearing parallelism needs to be strictly controlled, if the bearing parallelism changes, the bearing bush is unevenly stressed on the axis of the rotor, the bearing bush is possibly overloaded and locally overheated to burn the bearing bush, and even the shaft neck of the rotor of the generator is damaged, so that safety accidents are brought to a power plant.
In order to control the parallelism of the bearing, the design of the generator bearing needs to ensure that the bearing has self-aligning capability. However, the self-aligning capability of the bearing is related to the control deformation, the clearance and the like of the mounting part besides design parameters, and a factory test of the self-aligning capability of the bearing is very necessary for verifying whether the bearing has the self-aligning capability in the operation and collecting the control deformation or the control parameters and the like of the mounting part under the condition of ensuring that the bearing has the self-aligning capability.
How to simulate the bearing eccentricity is a great problem in factory testing of the self-aligning capability of the bearing, because the generator end bearing eccentricity is usually caused by forcibly pulling and deviating the generator rotor bearing after the rotating shaft of the steam turbine expands with heat and contracts with cold, and the condition is not met in factory testing.
For the problem of self-aligning capability of a bearing of a turbogenerator, related items are generally not tested in a factory at present; however, if the bearing actually has the self-aligning capability problem, the generator has a risk in the operation process.
Disclosure of Invention
The invention aims to provide a factory testing method for the parallelism of a bearing of a steam turbine generator, which aims to solve the problem that the parallelism of the bearing of the steam turbine generator cannot be well tested in the prior art.
The invention also provides a factory testing device for the parallelism of the bearing of the steam turbine generator.
The embodiment of the invention is realized by the following steps:
a factory testing method for parallelism of a bearing of a steam turbine generator comprises the following steps:
the method comprises the following steps: under the condition of not starting a high-pressure oil system of the turbonator, applying a set external force to the shaft end of the generator rotor to axially move the generator rotor for a set distance so as to simulate the axial displacement of the generator rotor caused by thermal expansion and cold contraction of a shaft system, thereby simulating the state of damage of the parallelism of a bearing of the generator;
step two: starting a high-pressure oil top system, recording the pressure of a high-pressure oil film and judging the damaged degree of the parallelism of the bearing according to the variable quantity of the pressure: the larger the oil film pressure change is, the larger the bearing parallelism is destroyed.
Compared with the prior art, the scheme can test the parallelism or the self-aligning capability of the bearing under the static state of the generator rotor, thereby avoiding bringing the bearing with the self-aligning capability problem to a power plant to bring the running risk to the power plant, and better solving the factory test problem of the self-aligning capability of the bearing.
In one embodiment:
the engine rotor is supported by two bearings, each of which comprises a bottom pad, a side pad and an upper pad;
4 high-pressure oil jacking and feeding oil bags are arranged in the axial width direction of each bearing bottom pad block, 2 high-pressure oil jacking and feeding oil bags are arranged in the axial width direction of each bearing side pad block, and each oil bag is independently connected with a high-pressure oil supply pipe.
In one embodiment:
and each high-pressure oil supply pipe is respectively provided with a valve capable of controlling the opening and closing of the corresponding high-pressure oil supply pipe and a pressure gauge capable of indicating the oil film pressure corresponding to each high-pressure oil supply pipe.
In one embodiment:
the oil pump is connected with each high-pressure oil supply pipe through a distributor so as to supply oil to each high-pressure oil supply pipe.
In one embodiment:
the distributor is simultaneously connected with each high-pressure oil supply pipe.
In one embodiment:
the oil pump is an alternating-current oil pump.
In one embodiment:
in the first step, a jack is adopted to apply a set external force to the shaft end of the generator rotor.
The invention also provides a factory testing device for the parallelism of the bearing of the steam turbine generator, wherein an engine rotor is supported by two bearings, and each bearing comprises a bottom tile block, a side tile block and an upper tile block; the testing device comprises 4 high-pressure oil jacking and feeding oil bags arranged in the axial width direction of each bearing bottom pad block, and 2 high-pressure oil jacking and feeding oil bags arranged in the axial width direction of each bearing side pad block, wherein each oil bag is independently connected with a high-pressure oil supply pipe;
each high-pressure oil supply pipe is respectively provided with a valve capable of controlling the opening and closing of the corresponding high-pressure oil supply pipe and a pressure gauge capable of indicating the oil film pressure corresponding to each high-pressure oil supply pipe;
the oil pump is connected with each high-pressure oil supply pipe through a distributor so as to supply oil to each high-pressure oil supply pipe.
The test device in mill of turbogenerator bearing depth of parallelism in this embodiment can be used to carry out the mill's test to turbogenerator bearing depth of parallelism, and this scheme compares with prior art, and it can test bearing depth of parallelism or self-aligning ability under generator rotor quiescent condition to avoid taking the bearing that will have the self-aligning ability problem to the power plant and bring the operational risk for the power plant, solved the mill's test difficult problem of bearing self-aligning ability betterly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings referred to in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings may be obtained from these drawings without inventive effort.
FIG. 1 is a view of a bearing parallelism test structure;
FIG. 2 is a diagram of a bearing parallelism performance test system.
Icon: the device comprises a rotor 11, a bearing 12, a high-pressure oil system 13, a bottom pad 21, a side pad 14, an oil bag 19, a high-pressure oil supply pipe 20, a valve 15, a pressure gauge 16, an oil pump 18 and a distributor 17.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The embodiment provides a factory testing method for parallelism of a bearing of a steam turbine generator, wherein a tested structure is shown in figure 1, two ends of a rotor 11 of the steam turbine generator are respectively supported by a bearing 12, and a high-pressure oil system 13 of the generator is respectively connected with the two bearings.
The factory testing method for the parallelism of the bearing of the steam turbine generator in the embodiment comprises the following steps:
the method comprises the following steps: under the condition that a high-pressure oil system of the turbonator is not started, a jack or other equipment is used for applying a set external force to the shaft end of the generator rotor so as to axially move the generator rotor for a set distance and simulate the axial displacement of the generator rotor caused by the expansion and contraction of a shaft system, so that the state of the damage of the parallelism of a bearing of the generator is simulated;
step two: starting a high-pressure oil top system, recording the pressure of a high-pressure oil film and judging the damaged degree of the parallelism of the bearing according to the variable quantity of the pressure: the larger the oil film pressure change is, the larger the bearing parallelism is destroyed.
Compared with the prior art, the scheme can test the parallelism or the self-aligning capability of the bearing under the static state of the generator rotor, thereby avoiding bringing the bearing with the self-aligning capability problem to a power plant to bring the running risk to the power plant, and better solving the factory test problem of the self-aligning capability of the bearing.
Each of said bearings comprises a bottom pad 21, a side pad 14 and an upper pad. Referring to fig. 2, 4 high-pressure oil jacking oil pockets 19 are arranged in the axial width direction of each bearing bottom pad, 2 high-pressure oil jacking oil pockets are arranged in the axial width direction of each bearing side pad, and each oil pocket is individually connected with a high-pressure oil supply pipe 20. Alternatively, each high-pressure oil supply pipe is provided with a valve 15 capable of controlling the opening and closing of the corresponding high-pressure oil supply pipe and a pressure gauge 16 capable of indicating the oil film pressure corresponding to each high-pressure oil supply pipe. The oil pump 18 is connected to each high-pressure oil supply pipe through the distributor 17 to supply oil to each high-pressure oil supply pipe. The distributor is simultaneously connected with each high-pressure oil supply pipe. Wherein the oil pump 18 may be a scavenge oil pump.
With continued reference to fig. 1 and 2, the present embodiment further provides a device for factory testing of parallelism of a bearing of a steam turbine generator, wherein an engine rotor is supported by two bearings, each of the bearings includes a bottom pad, a side pad and an upper pad; the testing device comprises 4 high-pressure oil jacking and feeding oil bags arranged in the axial width direction of each bearing bottom pad block, and 2 high-pressure oil jacking and feeding oil bags arranged in the axial width direction of each bearing side pad block, wherein each oil bag is independently connected with a high-pressure oil supply pipe; each high-pressure oil supply pipe is respectively provided with a valve capable of controlling the opening and closing of the corresponding high-pressure oil supply pipe and a pressure gauge capable of indicating the oil film pressure corresponding to each high-pressure oil supply pipe; the oil pump is connected with each high-pressure oil supply pipe through a distributor so as to supply oil to each high-pressure oil supply pipe.
The test device in mill of turbogenerator bearing depth of parallelism in this embodiment can be used to carry out the mill's test to turbogenerator bearing depth of parallelism, and this scheme compares with prior art, and it can test bearing depth of parallelism or self-aligning ability under generator rotor quiescent condition to avoid taking the bearing that will have the self-aligning ability problem to the power plant and bring the operational risk for the power plant, solved the mill's test difficult problem of bearing self-aligning ability betterly.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A factory testing method for parallelism of a bearing of a steam turbine generator is characterized by comprising the following steps:
the method comprises the following steps: under the condition of not starting a high-pressure oil system of the turbonator, applying a set external force to the shaft end of the generator rotor to axially move the generator rotor for a set distance so as to simulate the axial displacement of the generator rotor caused by thermal expansion and cold contraction of a shaft system, thereby simulating the state of damage of the parallelism of a bearing of the generator;
step two: starting a high-pressure oil top system, recording the pressure of a high-pressure oil film and judging the damaged degree of the parallelism of the bearing according to the variable quantity of the pressure: the larger the oil film pressure change is, the larger the bearing parallelism is destroyed.
2. The turbine generator bearing parallelism factory test method of claim 1, wherein:
the engine rotor is supported by two bearings, each of which comprises a bottom pad, a side pad and an upper pad;
4 high-pressure oil jacking and feeding oil bags are arranged in the axial width direction of each bearing bottom pad block, 2 high-pressure oil jacking and feeding oil bags are arranged in the axial width direction of each bearing side pad block, and each oil bag is independently connected with a high-pressure oil supply pipe.
3. The turbine generator bearing parallelism factory test method of claim 2, wherein:
and each high-pressure oil supply pipe is respectively provided with a valve capable of controlling the opening and closing of the corresponding high-pressure oil supply pipe and a pressure gauge capable of indicating the oil film pressure corresponding to each high-pressure oil supply pipe.
4. The turbine generator bearing parallelism factory test method of claim 2, wherein:
the oil pump is connected with each high-pressure oil supply pipe through a distributor so as to supply oil to each high-pressure oil supply pipe.
5. The turbine generator bearing parallelism factory test method of claim 4, wherein:
the distributor is simultaneously connected with each high-pressure oil supply pipe.
6. The turbine generator bearing parallelism factory test method of claim 4, wherein:
the oil pump is an alternating-current oil pump.
7. The turbine generator bearing parallelism factory test method of claim 1, wherein:
in the first step, a jack is adopted to apply a set external force to the shaft end of the generator rotor.
8. A turbine generator bearing parallelism factory test device, wherein an engine rotor is supported by two bearings, each bearing comprises a bottom tile block, a side tile block and an upper tile block; the method is characterized in that:
the testing device comprises 4 high-pressure oil jacking and feeding oil bags arranged in the axial width direction of each bearing bottom pad block, and 2 high-pressure oil jacking and feeding oil bags arranged in the axial width direction of each bearing side pad block, wherein each oil bag is independently connected with a high-pressure oil supply pipe;
each high-pressure oil supply pipe is respectively provided with a valve capable of controlling the opening and closing of the corresponding high-pressure oil supply pipe and a pressure gauge capable of indicating the oil film pressure corresponding to each high-pressure oil supply pipe;
the oil pump is connected with each high-pressure oil supply pipe through a distributor so as to supply oil to each high-pressure oil supply pipe.
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| CN108731729A (en) * | 2017-12-28 | 2018-11-02 | 江苏核电有限公司 | A kind of generator sealing bearing bush simulated experiment rack |
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| JPS5674631A (en) * | 1979-11-26 | 1981-06-20 | Hitachi Ltd | Abnormality diagnostic method of journal bearing |
| CN101403648A (en) * | 2008-11-20 | 2009-04-08 | 华北电力大学 | Steam flow excitation fault real-time diagnosis method for large steam turbine-generator |
| CN101738166B (en) * | 2010-01-09 | 2011-07-20 | 青岛理工大学 | Method for measuring sliding length of high-pressure lubricating oil interface |
| CN102003226A (en) * | 2010-12-13 | 2011-04-06 | 上海电气电站设备有限公司 | Turbine bearing lubricating oil supply system |
| CN102279105B (en) * | 2011-07-10 | 2013-07-24 | 太原科技大学 | Comprehensive test-bed for oil film bearing of rolling mill |
| CA2891435A1 (en) * | 2014-06-11 | 2015-12-11 | Kevin Lee Friesth | Quintuple-effect generation multi-cycle hybrid renewable energy system with integrated energy provisioning, storage facilities and amalgamated control system |
| CN110595774B (en) * | 2019-08-30 | 2021-08-17 | 河南省安装集团有限责任公司 | High-pressure oil film detection process for main shaft bearing of barrel mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103104427A (en) * | 2013-01-10 | 2013-05-15 | 朱华 | Solar energy steam closed loop circulation power plant |
| CN108731729A (en) * | 2017-12-28 | 2018-11-02 | 江苏核电有限公司 | A kind of generator sealing bearing bush simulated experiment rack |
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Inventor after: Guan Yongsheng Inventor after: Li Songhai Inventor after: Hou Jinghong Inventor after: Hu Jian Inventor after: Hu Dejian Inventor after: Wan Yi Inventor after: Wang Anping Inventor after: Su Lei Inventor after: Liu Jun Inventor after: Chen Jun Inventor after: Song Wenkui Inventor after: Hou Zhirong Inventor before: Guan Yongsheng Inventor before: Li Songhai Inventor before: Hou Jinghong Inventor before: Hu Jian Inventor before: Hu Dejian Inventor before: Wan Yi Inventor before: Wang Anping Inventor before: Su Lei Inventor before: Liu Jun Inventor before: Chen Jun Inventor before: Song Wenkui Inventor before: Hou Zhirong |
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Effective date of registration: 20210413 Address after: 188 Huanghe West Road, Jingyang District, Deyang City, Sichuan Province Applicant after: DEC DONGFANG ELECTRIC MACHINERY Co.,Ltd. Applicant after: CHINA NUCLEAR POWER ENGINEERING Co.,Ltd. Address before: 188 Huanghe West Road, Jingyang District, Deyang City, Sichuan Province Applicant before: DEC DONGFANG ELECTRIC MACHINERY Co.,Ltd. |
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