CN109990987B - Generator sealing tile test device and test method - Google Patents
Generator sealing tile test device and test method Download PDFInfo
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- CN109990987B CN109990987B CN201711459521.3A CN201711459521A CN109990987B CN 109990987 B CN109990987 B CN 109990987B CN 201711459521 A CN201711459521 A CN 201711459521A CN 109990987 B CN109990987 B CN 109990987B
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- 238000012360 testing method Methods 0.000 title claims abstract description 115
- 238000007789 sealing Methods 0.000 title claims abstract description 80
- 238000010998 test method Methods 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000003860 storage Methods 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 26
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000005485 electric heating Methods 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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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 belongs to the technical field of nuclear power station generators, and particularly relates to a generator sealing tile test device and a test method; the device and the method for testing the sealing tiles of the generator are provided, so that the tested sealing tiles can achieve the normal operation state of the steam turbine generator unit, and further the influence of the clearance between the sealing tiles and a shaft, the sealing oil pressure, the flow and the temperature on the operation state of the sealing tiles can be researched and evaluated; the test device comprises a test host (1), a temperature sensor (2), a rotating speed sensor (3), a vibration sensor (4), a flow sensor (5), a sealed oil tank (6), an electric heater (7), an oil-gas separator (8), a variable-frequency oil pump (9), a valve (10), a pressure sensor (11), a water cooler (12), a mechanical filter (13), a magnetic filter (14), a buffer oil tank (15), an air compressor (16), an air storage tank (17), an air pressure reducing valve (18), an air filter (19) and an air dryer (20).
Description
Technical Field
The invention belongs to the technical field of generators of nuclear power stations, and particularly relates to a generator sealing tile test device and a test method.
Background
In order to prevent hydrogen in the hydrogen-cooled generator from leaking along the gap between the shell and the rotor at the two ends of the generator, sealing tile devices are arranged at the two ends of the generator, and the flowing high-pressure sealing oil is used for sealing the hydrogen in the generator.
The sealing tile is complex in maintenance and high in installation process requirement, and the problem that the sealing tile is easy to deform in the unit punching or running process is solved, and the Tian Wan nuclear power station has the defect that the temperature of the sealing tile is high due to deformation of the sealing tile in the unit running process for many times, so that the safe and stable running of the unit is seriously threatened.
The sealing tile is deformed due to complex reasons, and the deformation can be caused by gradual release of processing stress in the operation process, or the deformation can be caused by insufficient natural aging of blanks or deficiency of heat treatment process in the processing and manufacturing processes of the sealing tile, and the deformation can be caused after the sealing tile operates for a period of time for any reason, so that the state of the sealing tile in the operation process cannot be determined in the overhaul process.
Moreover, in the seal tile installation standard provided by the russian, the seal tile installation standard is formulated under the condition of the russian local environment climate, and because the climate and the temperature of China are greatly different from those of the russian, when the seal tile is installed according to the standard provided by the russian, a plurality of contradictory problems often occur in the seal oil system, such as increasing the difference between the inner diameter of the seal tile and the corresponding journal, the tile temperature can be reduced, but the pressure of the seal oil supply parent pipe can be reduced, even the pressure is lower than the operation limit, and conversely, the tile temperature can be increased.
Therefore, at present, the sealing tile is mainly maintained and installed by experienced maintenance personnel, and even though the sealing tile is still installed, the problems of high temperature, hydrogen leakage and the like of the sealing tile due to the installation process or deformation of the sealing tile still occur.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a generator sealing tile test device and a test method for enabling a tested sealing tile to achieve the normal running state of a simulated turbo generator set, so as to research and evaluate the influence of the clearance between the sealing tile and a shaft, the sealing oil pressure, the flow and the temperature on the running state of the sealing tile.
The technical scheme of the invention is as follows:
the generator sealing tile test device comprises a test host 1, a temperature sensor 2, a rotating speed sensor 3, a vibration sensor 4, a flow sensor 5, a sealing oil tank 6, an electric heater 7, an oil-gas separator 8, a variable frequency oil pump 9, a valve 10, a pressure sensor 11, a water cooler 12, a mechanical filter 13, a magnetic filter 14, a buffer oil tank 15, an air compressor 16, an air storage tank 17, an air pressure reducing valve 18, an air filter 19 and an air dryer 20; ten measuring holes are formed in the test host 1 and used for installing the temperature sensor 2, the rotating speed sensor 3 and the vibration sensor 4, and the test host 1 is connected with the sealed oil tank 6 through bolts; the sealed oil tank 6 is a pyramid-shaped oil tank with a volume of 10m 3 The bottom of the oil tank is square, 4 weeks of the oil tank is fixed on the ground foundation through bolts, the upper part of the oil tank is connected with the test host 1, the electric heater 7 is arranged in the sealed oil tank 6, the electric heater 7 is a high-strength rod-shaped electric heating element, and the number of the electric heaters is preferably eight to ten two groups; the oil-gas separator 8 is connected between the test host 1 and the sealed oil tank 6 through a flange; the inlet of the variable frequency oil pump 9 is connected with the oil way outlet at the bottom of the sealed oil tank 6 through a flange, the outlet of the variable frequency oil pump 9 is connected with the valve 10 through a flange, the other end of the valve 10 is connected with the oil way inlet of the water cooler 12 through a flange, and the pressure sensor 11 and the temperature sensor 2 are connected on a pipeline between the valve 10 and the water cooler 12 through threads; the outlet of the oil pipeline of the water cooler 12 is connected with the mechanical filter 13 through a flange, and the valve 10 is respectively arranged at the inlet and the outlet of the water pipeline of the water cooler 12 through the flange and used for controlling the discharge of cooling water and further controlling the temperature of sealing oil; the temperature sensor 2 is fixed on a pipeline of the water cooler 12 connected with the mechanical filter 13; the inlet and outlet of the mechanical filter 13 are connected with the valve 10 through a flange, and the two mechanical filters 13 and the valve 10 are connected in parallel and then connected with the water cooler 12 and the magnetic filter 14 through flanges; the inlet of the magnetic filter 14 is connected with the valve 10 through a pipeline and then is connected into the sealed oil tank 6, and the pressure sensor 11 is respectively arranged on pipelines in front of the mechanical filter 12 and behind the magnetic filter 13 through threaded connection; the bottom of the buffer oil tank 15 is provided with an inlet and an outlet of an oil way, the top of the buffer oil tank 15 is provided with an air hole, and the inlet of the oil way of the buffer oil tank 15 is connected with the outlet of the magnetic filter 14 through a flangeThe outlet is connected with the test host 1 through a flange, and the air hole at the top is connected with the air storage tank 17 through a flange; the temperature sensor 2, the flow sensor 5 and the pressure sensor 11 are arranged on a pipeline between the outlet of the oil pipeline of the buffer oil tank 15 and the middle of the test host 1; the outlet of the air compressor 16 is connected with the inlet of the valve 10 through a flange, the outlet of the valve 10 is connected with the inlet of the air pressure reducing valve 18, the air filter 19, the air dryer 20 and the air storage tank 17 in sequence, and the outlet of the air storage tank 17 is connected with the test host 1 through a pipeline flange; the air storage tank 17 is a cylindrical barrel with the volume of 0.3m 3 The compressed air inlet and the compressed air outlet are respectively formed in two sides of the test main machine, the air storage tank 17 is used for stabilizing air pressure, and the pressure of the compressed air entering the test main machine 1 is ensured to be constant; the temperature sensor 2 and the pressure sensor 11 are connected to a pipeline between the test host 1 and the air storage tank 17 through threads, and are used for detecting the pressure and the temperature of the compressed air entering the test host 1.
The implementation of the method for testing the generator sealing tile is based on the device for testing the generator sealing tile, and the method comprises the following steps:
firstly, an electric heater 7 in a sealed oil tank 6 is turned on, the oil temperature is heated to 35 ℃, a variable-frequency oil pump 9 is started again, the oil pressure is regulated to 0.58Mpa, the actual pressure monitored by a pressure sensor at the outlet of the variable-frequency oil pump 9 is observed, and the actual pressure is compared with the target pressure;
after the pressure is stabilized, starting an air compressor 16, regulating the pressure of compressed air to 0.5Mpa through an air pressure reducing valve 18, after observing that the pressure at the outlet of an air storage tank 17 is stabilized at a target pressure, starting a test host, enabling the test host 1 to be in soft start to 3000r/min through a frequency converter, enabling the rotating speed deviation not to be larger than +/-3 rpm, if the temperature at the outlet of an alternating current oil pump 6 is higher than 50 ℃ in the test process, turning off an electric heater 7, and turning on a water cooler 12;
finally, in the running process, each parameter is continuously monitored, if any parameter exceeds the specified limit, the test host 1 must be stopped immediately, after the motor is completely stopped, the compressed air system is powered off, the air cooler is stopped, the variable frequency oil pump 9 is stopped, and the test can be performed again after the fault cause is ascertained.
The beneficial effects of the invention are as follows:
according to the invention, the normal running state of the turbo generator set 3000r/min can be simulated through the test host, the running parameters of the sealing tiles are accurately recorded through the installed high-precision sensor, the influence of the clearance between different sealing tiles and shafts, the sealing oil pressure, the flow, the temperature and other parameters on the running state of the sealing tiles can be estimated, and meanwhile, whether the sealing tiles deform in the running process can be checked, so that the failure probability of the sealing tiles after formal reinstallation can be effectively reduced.
Drawings
FIG. 1 is a flow chart of a seal shoe test apparatus
In the figure: 1. a test host; 2. a temperature sensor; 3. a rotation speed sensor; 4. a vibration sensor; 5. a flow sensor; 6. sealing the oil tank; 7. an electric heater; 8. an oil-gas separator; 9. variable frequency oil pump; 10. a valve; 11. a pressure sensor; 12. a water cooler; 13. a mechanical filter; 14. a magnetic filter; 15. a buffer oil tank; 16. an air compressor; 17. a gas storage tank; 18. an air pressure reducing valve; 19. an air cleaner; 20. an air dryer.
Detailed Description
The invention is further described with reference to the following drawings and examples:
the generator sealing tile test device comprises a test host 1, a temperature sensor 2, a rotating speed sensor 3, a vibration sensor 4, a flow sensor 5, a sealing oil tank 6, an electric heater 7, an oil-gas separator 8, a variable frequency oil pump 9, a valve 10, a pressure sensor 11, a water cooler 12, a mechanical filter 13, a magnetic filter 14, a buffer oil tank 15, an air compressor 16, an air storage tank 17, an air pressure reducing valve 18, an air filter 19 and an air dryer 20; ten measuring holes are formed in the test host 1 and used for installing the temperature sensor 2, the rotating speed sensor 3 and the vibration sensor 4, and the test host 1 is connected with the sealed oil tank 6 through bolts; the sealed oil tank 6 is a pyramid-shaped oil tank with a volume of 10m 3 The bottom of the oil tank is square, 4 weeks of the oil tank is fixed on the ground through bolts, the upper part of the oil tank is connected with the test host 1, the electric heater 7 is arranged in the sealed oil tank 6, and the electric heater 7 is in a high-strength rod-shaped electric heating modeThe number of elements is preferably eight to ten two groups; the oil-gas separator 8 is connected between the test host 1 and the sealed oil tank 6 through a flange; the inlet of the variable frequency oil pump 9 is connected with the oil way outlet at the bottom of the sealed oil tank 6 through a flange, the outlet of the variable frequency oil pump 9 is connected with the valve 10 through a flange, the other end of the valve 10 is connected with the oil way inlet of the water cooler 12 through a flange, and the pressure sensor 11 and the temperature sensor 2 are connected on a pipeline between the valve 10 and the water cooler 12 through threads; the outlet of the oil pipeline of the water cooler 12 is connected with the mechanical filter 13 through a flange, and the valve 10 is respectively arranged at the inlet and the outlet of the water pipeline of the water cooler 12 through the flange and used for controlling the discharge of cooling water and further controlling the temperature of sealing oil; the temperature sensor 2 is fixed on a pipeline of the water cooler 12 connected with the mechanical filter 13; the inlet and outlet of the mechanical filter 13 are connected with the valve 10 through a flange, and the two mechanical filters 13 and the valve 10 are connected in parallel and then connected with the water cooler 12 and the magnetic filter 14 through flanges; the inlet of the magnetic filter 14 is connected with the valve 10 through a pipeline and then is connected into the sealed oil tank 6, and the pressure sensor 11 is respectively arranged on pipelines in front of the mechanical filter 12 and behind the magnetic filter 13 through threaded connection; the bottom of the buffer oil tank 15 is provided with an inlet and an outlet of an oil way, the top of the buffer oil tank 15 is provided with an air hole, the inlet of the oil way of the buffer oil tank 15 is connected with the outlet of the magnetic filter 14 through a flange, the outlet is connected with the test host 1 through a flange, and the air hole at the top is connected with the air storage tank 17 through a flange; the temperature sensor 2, the flow sensor 5 and the pressure sensor 11 are arranged on a pipeline between the outlet of the oil pipeline of the buffer oil tank 15 and the middle of the test host 1; the outlet of the air compressor 16 is connected with the inlet of the valve 10 through a flange, the outlet of the valve 10 is connected with the inlet of the air pressure reducing valve 18, the air filter 19, the air dryer 20 and the air storage tank 17 in sequence, and the outlet of the air storage tank 17 is connected with the test host 1 through a pipeline flange; the air storage tank 17 is a cylindrical barrel with the volume of 0.3m 3 The compressed air inlet and the compressed air outlet are respectively formed in two sides of the test main machine, the air storage tank 17 is used for stabilizing air pressure, and the pressure of the compressed air entering the test main machine 1 is ensured to be constant; the temperature sensor 2 and the pressure sensor 11 are connected to a pipeline between the test host 1 and the air storage tank 17 through threads, and are used for detecting the pressure and the temperature of the compressed air entering the test host 1.
The implementation of the method for testing the generator sealing tile is based on the device for testing the generator sealing tile, and the method comprises the following steps:
firstly, an electric heater 7 in a sealed oil tank 6 is turned on, the oil temperature is heated to 35 ℃, a variable-frequency oil pump 9 is started again, the oil pressure is regulated to 0.58Mpa, the actual pressure monitored by a pressure sensor at the outlet of the variable-frequency oil pump 9 is observed, and the actual pressure is compared with the target pressure;
after the pressure is stabilized, starting an air compressor 16, regulating the pressure of compressed air to 0.5Mpa through an air pressure reducing valve 18, after observing that the pressure at the outlet of an air storage tank 17 is stabilized at a target pressure, starting a test host, enabling the test host 1 to be in soft start to 3000r/min through a frequency converter, enabling the rotating speed deviation not to be larger than +/-3 rpm, if the temperature at the outlet of an alternating current oil pump 6 is higher than 50 ℃ in the test process, turning off an electric heater 7, and turning on a water cooler 12;
finally, in the running process, each parameter is continuously monitored, if any parameter exceeds the specified limit, the test host 1 must be stopped immediately, after the motor is completely stopped, the compressed air system is powered off, the air cooler is stopped, the variable frequency oil pump 9 is stopped, and the test can be performed again after the fault cause is ascertained.
The invention is composed of several parts of test host, main oil tank, oil pump, oil cooler, filter, buffer oil tank, air compressor and air storage mechanism.
The test host is fixed above the main oil tank through bolts, the oil pump is positioned on the right side of the main oil tank, an inlet of the oil pump is connected with the oil tank through a flange, an outlet of the oil pump is connected with the oil cooler through a flange, an outlet of the oil cooler is connected with an inlet of the filter, an outlet of the filter is connected with an inlet of the buffer oil tank through a flange, and an outlet of the buffer oil tank is connected with the test host through a flange. The air compressor outlet is connected with the air storage mechanism inlet through a flange, and the air storage mechanism outlet is connected with the test host through a flange.
The test host mainly comprises an alternating current motor, a main shaft, a wheel disc, a sealing tile seat, a temperature sensor, a rotating speed sensor, a vibration sensor and the like. The alternating current motor drives the main shaft and the wheel disc to 3000 turns through the semi-winding coupling sleeve, is used for simulating the normal running state of the steam turbine generator unit, and the temperature sensor, the rotating speed sensor, the vibration sensor and the flow sensor are connected to the sealing tile seat through screw threads and are used for monitoring parameters such as vibration, rotating speed, the temperature of the tested sealing tile and the like in the running process of the test host.
The main oil tank mainly comprises a sealed oil tank, an electric heater and an oil-gas separator. The sealed oil tank is fixed on the ground foundation through a bolt, the electric heater is arranged in the sealed oil tank and used for heating sealed oil before starting, and the oil-gas separator is connected between the sealed tile seat and the sealed oil tank through a pipeline flange and used for separating sealed oil and air leaking from the gas side of the sealed tile.
The oil pump is a variable-frequency oil pump, provides power for a sealing oil way of the sealing tile test device, and ensures that the oil pressure entering the test host meets the test requirement.
The oil cooler is a water cooler. The inlet of the oil pipeline of the water cooler is connected with the oil pump, and the outlet of the oil pipeline of the water cooler is connected with the mechanical filter through a flange and is used for cooling the sealing oil temperature in the test process, so that the sealing oil temperature is ensured to be within the test requirement range. The water cooler has a separate cooling water circuit for cooling the sealing oil.
The filter mainly comprises a mechanical filter and a magnetic filter, wherein an inlet and an outlet of the mechanical filter are connected with a valve through a flange, an inlet of the two mechanical filters after being connected in parallel is connected with an outlet of the water cooler through a flange, an outlet of the mechanical filter is connected with an inlet of the magnetic filter in series, and an outlet of the magnetic filter is connected with a buffer oil tank. The filter is mainly used for filtering the sealing oil entering the tested sealing tile, and ensuring that the oil quality meets the test requirement.
The buffer oil tank is a cylindrical barrel, and the installation position is higher than the test host computer and is used for preventing sudden power failure or other conditions and damaging sealing tiles or other accessory devices in the parking process.
The air compressor is an air compressor and is used for providing compressed air required by a sealing tile test.
The gas storage mechanism comprises a gas storage tank, an air pressure reducing valve, an air filter and an air dryer. An air pressure reducing valve, an air filter and an air dryer are sequentially arranged between an inlet of the air storage tank and an outlet connection pipeline of the air compressor, so that clean air with rated pressure is guaranteed to enter the air storage tank, an outlet of the air storage tank is connected with a test host, and compressed air with rated pressure is provided for a seal tile test.
As shown in FIG. 1, the sealed tank 6 is a pyramid-shaped tank with a volume of 10m 3 The bottom of the oil tank is square, 4 weeks are fixed on the ground through bolts, the upper part of the oil tank is connected with the test host 1, the electric heater 7 is arranged in the sealed oil tank 6, the electric heater 7 is a high-strength rod-shaped electric heating element, and the number is preferably 8-12 groups. The oil-gas separator 8 is connected between the test host 1 and the sealed oil tank 6 through a flange.
As shown in fig. 1, the inlet of the variable-frequency oil pump 9 is connected with the outlet of the oil way at the bottom of the sealed oil tank 6 through a flange, the outlet of the variable-frequency oil pump 9 is connected with a valve 10 through a flange, the other end of the valve 10 is connected with the inlet of the oil pipeline of the water cooler 12 through a flange, and the pressure sensor 11 and the temperature sensor 2 are connected on the pipeline between the valve 10 and the water cooler 12 through threads. The outlet of the oil pipeline of the water cooler 12 is connected with the mechanical filter 13 through a flange, and the valve 10 is respectively arranged at the inlet and the outlet of the water pipeline of the water cooler 12 through the flange and used for controlling the discharge of cooling water and further controlling the temperature of sealing oil. The temperature sensor 2 is fixed to a line connecting the water cooler 12 and the mechanical filter 13.
As shown in fig. 1, the inlet and outlet of the mechanical filter 13 are connected with the valve 10 through a flange, and the two mechanical filters 13 and the valve 10 are connected in parallel and then connected with the water cooler 12 and the magnetic filter 14 through flanges. The inlet of the magnetic filter 14 is connected with the valve 10 through a pipeline and then is connected into the sealed oil tank 6, and the pressure sensor 11 is respectively arranged on pipelines in front of the mechanical filter 12 and behind the magnetic filter 13 through threaded connection.
As shown in FIG. 1, the buffer tank 15 is a cylindrical cylinder with a volume of 1m 3 The installation position is higher than the test host machine, so as to prevent sudden power failure or other conditions, and damage the sealing tiles or other attached devices during the parking process. The bottom of the buffer oil tank 15 is provided with an inlet and an outlet of an oil wayThe top of the test main machine 1 is provided with an air hole, an oil way inlet of the buffer oil tank 15 is connected with an outlet of the magnetic filter 14 through a flange, the outlet is connected with the test main machine 1 through a flange, and the air hole at the top of the test main machine is connected with the air storage tank 17 through a flange. The temperature sensor 2, the flow sensor 5 and the pressure sensor 11 are arranged on a pipeline between the oil pipeline outlet of the buffer oil tank 15 and the test host 1.
As shown in fig. 1, the outlet of the air compressor 16 is connected with the inlet of the valve 10 through a flange, the outlet of the valve 10 is connected with the inlet of the air pressure reducing valve 18, the air filter 19, the air dryer 20 and the air storage tank 17 in sequence, and the outlet of the air storage tank 17 is connected with the test host 1 through a pipeline flange. The air storage tank 17 is a cylindrical barrel with the volume of 0.3m 3 The compressed air inlet and the compressed air outlet are respectively formed in two sides of the test main machine, the air storage tank 17 is used for stabilizing air pressure, and the pressure of the compressed air entering the test main machine 1 is ensured to be constant. The temperature sensor 2 and the pressure sensor 11 are connected on a pipeline between the test host 1 and the air storage tank 17 through threads and are used for detecting the pressure and the temperature of the compressed air entering the test host 1.
The working principle of the sealing tile test device provided by the invention is described below with reference to fig. 1: in order to simulate the actual running state of the tested sealing tile, the test device simulates a test host, a sealing oil system and a compressed air system of the operation of the steam turbine generator unit.
The test host 1 provides power to enable the tested sealing tile to reach a real running state. The 10 measuring holes circumferentially opened in the test main machine 1 are provided with a temperature sensor 2, a rotating speed sensor 3 and a vibration sensor 4, and are used for continuously measuring the temperature of the sealing bush, the rotating speed of the main shaft and the vibration condition during the test.
The sealing oil system consists of a sealing oil tank 6, a variable-frequency oil pump 9, a water cooler 12, a mechanical filter 13, a magnetic filter 14, a buffer oil tank 15 and an oil-gas separator 8. The outlet pressure of the variable frequency oil pump 9 is regulated to rated pressure by the control of a frequency converter, for example, 0.58Mpa, sealing oil is conveyed from the sealing oil tank 6 to the water cooler 12 at constant pressure, the water cooler 12 belongs to a surface heat exchanger, the sealing oil is cooled by cooling water, the cooled sealing oil enters the mechanical filter 13 and the magnetic filter 14, mechanical impurities and magnetic substances are filtered respectively, then the sealing oil enters the buffer oil tank 15, and the sealing oil enters the test host 1 again through the buffer oil tank 15. The pressure sensor 11, the temperature sensor 2 and the flow sensor 5 are used for oil inlet pressure, oil inlet temperature, oil return temperature, oil inlet flow and oil return flow during uninterrupted test.
The compressed air system is used for simulating the running state of hydrogen in a generator hall, the outlet of the air compressor 16 is sequentially connected with the air pressure reducing valve 18, the air filter 19, the air dryer 20 and the inlet of the air storage tank 17, the temperature of the compressed air entering the air storage tank 17 is guaranteed to be at rated pressure, for example 0.5Mpa, through the air pressure reducing valve 18, the air filter 19 and the air dryer 20 are used for guaranteeing the clean and dry of the compressed air, the outlet of the air storage tank 17 is connected to the test host machine 1 and used for providing the compressed air required by a sealing tile test, and the temperature sensor 2 and the pressure sensor 11 are used for continuously monitoring the pressure and the temperature of the compressed air entering the test host machine 1. A further branch is connected to the air vent at the top of the buffer tank 15 for ensuring that the buffer tank is able to provide sealing oil for a short period of time during a stop, in case of a sudden power outage or other, avoiding damaging the sealing tiles or other accessory devices.
The operation and test method of the invention comprises the following steps:
firstly, an electric heater 7 in a sealed oil tank 6 is started, the oil temperature is heated to 35 ℃, a variable-frequency oil pump 9 is started again, the oil pressure is regulated to 0.58Mpa, the actual pressure monitored by a pressure sensor at the outlet of the variable-frequency oil pump 9 is observed, the actual pressure is compared with the target pressure, after the pressure is stable, an air compressor 16 is started, the compressed air pressure is regulated to 0.5Mpa through an air pressure reducing valve 18, after the pressure at the outlet of an air storage tank 17 is observed to be stable at the target pressure, a test host is started, the test host 1 is enabled to be in soft start to 3000r/min through a frequency converter, the rotating speed deviation cannot be larger than +/-3 rpm, if the temperature at the outlet of an alternating-current oil pump 6 is higher than 50 ℃ in the test process, the electric heater 7 is turned off, and a water cooler 12 is turned on. In the running process, each parameter is continuously monitored, if any parameter exceeds the specified limit, the test host 1 must be stopped immediately, after the motor is completely stopped, the compressed air system is powered off, the air cooler is stopped, the variable frequency oil pump 9 is stopped, and the test can be performed again after the fault cause is ascertained.
The present invention has been described in detail with reference to the drawings, but the present invention is not limited to the above examples, and the purpose of testing different types of sealing tiles can be achieved by changing the setting related parameters and replacing the spindle 2 and the wheel disc 3 within the knowledge of those skilled in the art without departing from the spirit of the present invention. The present invention is not described in detail in the specification, and for example, the temperature sensor 2, the rotation speed sensor 3, the vibration sensor 4, the flow sensor 5, the valve 10, the pressure sensor 11, the water cooler 12, the air pressure reducing valve 18, the air filter 19 and the air dryer 20 may be all manufactured by the prior art.
Claims (2)
1. The utility model provides a generator seal tile test device which characterized in that: the device comprises a test host (1), a temperature sensor (2), a rotation speed sensor (3), a vibration sensor (4), a flow sensor (5), a sealed oil tank (6), an electric heater (7), an oil-gas separator (8), a variable-frequency oil pump (9), a valve (10), a pressure sensor (11), a water cooler (12), a mechanical filter (13), a magnetic filter (14), a buffer oil tank (15), an air compressor (16), an air storage tank (17), an air pressure reducing valve (18), an air filter (19) and an air dryer (20); ten measuring holes are formed in the test host machine (1) and used for installing the temperature sensor (2), the rotating speed sensor (3) and the vibration sensor (4), and the test host machine (1) is connected with the sealed oil tank (6) through bolts; the sealed oil tank (6) is a pyramid-shaped oil tank with the volume of 10m 3 The bottom of the oil tank is square, the periphery of the oil tank is fixed on the ground foundation through bolts, the upper part of the oil tank is connected with the test host (1), the electric heater (7) is arranged in the sealed oil tank (6), and the electric heater (7) is a high-strength rod-shaped electric heating element; the oil-gas separator (8) is connected between the test host (1) and the sealed oil tank (6) through a flange; the inlet of the variable-frequency oil pump (9) is connected with the outlet of the oil way at the bottom of the sealed oil tank (6) through a flange, the outlet of the variable-frequency oil pump (9) is connected with a valve (10) through a flange, and the other end of the valve (10) is connected with the inlet of the oil pipeline of the water cooler (12) through a flangeThe pressure sensor (11) and the temperature sensor (2) are connected to a pipeline between the valve (10) and the water cooler (12) through threads; the outlet of the oil pipeline of the water cooler (12) is connected with the mechanical filter (13) through a flange, and the valve (10) is respectively arranged at the inlet and the outlet of the water pipeline of the water cooler (12) through the flange and used for controlling the discharge of cooling water so as to control the temperature of sealing oil; the temperature sensor (2) is fixed on a pipeline connected with the water cooler (12) and the mechanical filter (13); the inlet and outlet of the mechanical filter (13) are connected with the valve (10) through a flange, and the two mechanical filters (13) are connected with the valve (10) in parallel and then connected with the water cooler (12) and the magnetic filter (14) through flanges; an inlet of the magnetic filter (14) is connected with the valve (10) through a pipeline and then is connected into the sealed oil tank (6), and the pressure sensor (11) is respectively arranged on pipelines in front of the mechanical filter (13) and behind the magnetic filter (14) through threaded connection; the buffer oil tank (15) is a cylindrical barrel with the volume of 1m 3 An inlet and an outlet of an oil way are formed in the bottom of the buffer oil tank (15), an air hole is formed in the top of the buffer oil tank, the inlet of the oil way of the buffer oil tank (15) is connected with the outlet of the magnetic filter (14) through a flange, the outlet of the buffer oil tank is connected with the test host (1) through a flange, and the air hole in the top of the buffer oil tank is connected with the air storage tank (17) through a flange; the temperature sensor (2), the flow sensor (5) and the pressure sensor (11) are arranged on a pipeline between an oil pipeline outlet of the buffer oil tank (15) and the test host (1); an outlet of the air compressor (16) is connected with an inlet of the valve (10) through a flange, an outlet of the valve (10) is sequentially connected with an air pressure reducing valve (18), an air filter (19), an air dryer (20) and an inlet of the air storage tank (17), and an outlet of the air storage tank (17) is connected with the test host (1) through a pipeline flange; the air storage tank (17) is a cylindrical barrel with the volume of 0.3m 3 The two sides are respectively provided with an inlet and an outlet of compressed air, the air storage tank (17) is used for stabilizing air pressure, and the pressure of the compressed air entering the test host (1) is ensured to be constant; the temperature sensor (2) and the pressure sensor (11) are connected to a pipeline between the test host (1) and the air storage tank (17) through threads and are used for detecting the pressure and the temperature of the compressed air entering the test host (1).
2. A method for testing a sealing shoe of a generator, which is based on the device for testing a sealing shoe of a generator in claim 1, and is characterized in that: the method comprises the following steps:
firstly, an electric heater (7) in a sealed oil tank (6) is turned on, the oil temperature is heated to 35 ℃, then a variable-frequency oil pump 9 is started, the oil pressure is regulated to 0.58Mpa, the actual pressure monitored by a pressure sensor at the outlet of the variable-frequency oil pump (9) is observed, and the actual pressure is compared with the target pressure;
after the pressure is stabilized, an air compressor (16) is started, the pressure of compressed air is regulated to 0.5Mpa through an air pressure reducing valve (18), after the pressure at the outlet of an air storage tank (17) is observed to be stabilized at a target pressure, a test host is started, the test host (1) is softly started to 3000r/min through a frequency converter, the rotating speed deviation cannot be more than +/-3 rpm, if the outlet temperature of a variable frequency oil pump (9) is higher than 50 ℃ in the test process, an electric heater (7) is turned off, and a water cooler (12) is turned on;
finally, in the running process, each parameter is continuously monitored, if any parameter exceeds the specified limit, the test host (1) must be stopped immediately, after the motor is completely stopped, the compressed air system is powered off, the air cooler is stopped, the variable frequency oil pump (9) is stopped, and the test can be performed again after the fault cause is ascertained.
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