CN110160946B - Deep peak regulation steam turbine blade erosion test system and test method thereof - Google Patents

Abstract

The invention discloses a deep peak regulation turbine blade erosion test system and a test method thereof. The invention comprises a steam turbine test device, a particle erosion system and a liquid drop erosion system; the particle erosion system comprises a particle tank, a vibrating device, a screening device, a weighing machine, a propelling device, a high-frequency electric heating furnace, a mixer and a particle ejector, wherein the vibrating device, the screening device, the weighing machine, the propelling device, the high-frequency electric heating furnace, the mixer and the particle ejector are installed below the particle tank, particles in the particle tank enter the screening device after passing through the vibrating device, the screened particles enter the propelling device through the weighing machine, the propelling device is used for pushing the particles into the high-frequency electric heating furnace, the high-frequency electric heating furnace heats the particles, the heated particles enter the mixer and then enter the particle ejector, and the particle ejector sprays the particles into a test room to perform a particle erosion test. The method can be used for researching the influence of different experimental conditions on the erosion of the turbine blade, has the advantages of multiple functions, strong applicability and the like, and is particularly suitable for the research on the vibration aspect of the deep peak regulation turbine.

Description

Deep peak regulation steam turbine blade erosion test system and test method thereof

Technical Field

The invention belongs to the field of turbine blade erosion tests, and particularly relates to a deep peak shaving turbine blade erosion test system and a test method thereof.

Background

The turbine blade is a key part in a turbine and bears high temperature, high pressure, centrifugal force, exciting force, blade corrosion, water drop erosion and the like during working. Under the working environment, the blades are scaled, damaged, cracked and broken, so that the vibration problem is caused, and the safe operation of the steam turbine is seriously influenced.

With the large capacity of the power station steam turbine in China, the safety and the reliability of the blade are more and more important. The blade is scaled, and the unit is vibrated when solid particles are slightly eroded, and the unit is stopped when the solid particles are serious. The problems of the blades and the rotors of the blades are not found in time, so that the accident is enlarged, the unit vibration is large, and the whole unit is damaged.

Along with the construction of extra-high voltage, the load hours of the thermal power generating unit in Zhejiang province are continuously reduced. In the past, the thermal power generating unit in Zhejiang province continuously performs a deep peak regulation test, and when the steam turbine is in low load, blades are eroded by water drops, so that the blades are easy to break, and the safety problem is increasingly prominent.

The existing research aiming at the erosion of the turbine blade is less, the blade problem is frequent day by day along with the increase of the unit capacity, and a system for researching the turbine blade is urgently needed.

Disclosure of Invention

Aiming at the defects or improvement requirements in the prior art, the invention provides a deep peak regulation turbine blade erosion test system, which is used for realizing erosion tests of different particles and liquid drops on blades and researching the influence of different test conditions on the turbine blades.

Therefore, the invention adopts the following technical scheme: a depth peak regulation turbine blade erosion test system comprises turbine test equipment, a particle erosion system and a liquid drop erosion system;

the steam turbine test equipment comprises a test room, a steam turbine, a coupler and a motor, wherein the steam turbine, the coupler and the motor are positioned in the test room;

the particle erosion system comprises a particle tank, a vibrating device, a screening device, a weighing machine, a propelling device, a high-frequency electric heating furnace, a mixer and a particle ejector, wherein the vibrating device, the screening device, the weighing machine, the propelling device, the high-frequency electric heating furnace, the mixer and the particle ejector are arranged below the particle tank;

the liquid drop erosion system comprises a constant pressure boiler, wet steam of the constant pressure boiler enters a steam-liquid mixer through a first flow meter, water enters the steam-liquid mixer through a second flow meter to be mixed, the mixed steam and liquid enter a steam jet supercharger to be pressurized through a first electric valve, and the pressurized steam and liquid enter a test room through a second pressure regulating valve, a second speed regulating valve and a nozzle to be subjected to a liquid drop erosion test; wet steam of the constant pressure boiler enters the mixer through the third flowmeter and the first electromagnetic valve to moisten the particles.

The rotating speed of the steam turbine is adjusted by the motor, and tests are carried out at different rotating speeds. The particles can obtain different pressures and speeds in the propelling device, and the nozzles can be set with spraying angles and speeds to meet the test requirements; in addition, the nozzle can realize the adjustment of the diameter of the liquid drop, and tests under different liquid drop diameters can be carried out.

In the particle erosion system, particle erosion tests under different particle diameters, different mass flow rates, different speeds and different pressures can be researched; in addition, particle erosion tests at different particle mix ratios, different air to particle mix ratios, can also be studied.

Furthermore, the test system also comprises a salt accumulation system, wherein the salt accumulation system comprises a brine evaporator, a second electromagnetic valve, a vapor-liquid separator, a third electromagnetic valve, a fourth flowmeter and a second electric valve which are sequentially connected in series; the salt steam from the second electric valve flows through the steam jet supercharger, the pressure regulating valve, the speed regulating valve and the nozzle in sequence and then enters a laboratory for salt accumulation test. The salt accumulation system and the liquid drop erosion system share part of facilities, so that the cost is saved. In the salt accumulation system, a salt water evaporator generates saturated salt steam, and a vapor-liquid separator separates vapor and liquid; the nozzle can adjust the angle and speed to meet different spraying requirements.

Furthermore, the mixer is also connected with a high-pressure air tank, and air in the high-pressure air tank enters the mixer after passing through a fifth flowmeter and is fully mixed with the particles. The high-pressure air tank is mainly used for mixing particles with air to realize particle suspension.

Furthermore, the number of the particle tanks is at least two, and the number of the vibration devices, the screening devices, the weighing machines and the propelling devices is the same as that of the particle tanks, so that at least two particle propelling lines are formed. A plurality of particle tanks are employed for storing different types and sizes of particles.

Further, the particles mixed by the mixer pass through a sixth flow meter, a first pressure regulating valve and a first speed regulating valve and then enter the particle ejector.

Furthermore, the test system also comprises a steam simulation system, the steam simulation system comprises a high-temperature steam generator, and steam generated by the high-temperature steam generator enters the test room after passing through a seventh flowmeter, a left main steam valve and a right main steam valve.

Furthermore, the return steam enters the recovery device through the steam extraction pipeline and the particle filtering device, and the recovery device maintains negative pressure and is realized through the vacuum pump.

Furthermore, the test system also comprises a lubricating oil system, wherein the lubricating oil system comprises an oil tank, an oil pump, a first valve and a bearing oil inlet pressure regulating valve; oil in the oil tank enters the bearing through the oil pump and the first valve, the pressure is adjusted through the bearing oil inlet pressure adjusting valve, and the oil returned by the bearing returns to the oil tank through the oil return pipeline.

Furthermore, the oil tank is provided with a smoke exhaust fan and a second valve, the smoke exhaust fan is started to exhaust smoke in the oil tank, the micro negative pressure of the oil tank is maintained, and the opening degree of the second valve is adjusted to adjust the negative pressure.

The invention also provides the following technical scheme: the test method of the turbine blade erosion test system comprises the following steps:

1) assembling steam turbine test equipment;

2) lubricating oil is filled in the oil tank, the electric heater is started to heat the lubricating oil to a proper temperature, the first valve is opened, the oil pump is started to feed oil to the bearing, and the oil pressure of the bearing is adjusted to a proper range through the bearing oil feed pressure adjusting valve;

3) simultaneously opening a second valve, and starting a smoke exhaust fan to maintain the pressure in the oil tank at a negative pressure; when the negative pressure of the oil tank changes, the opening of the second valve is adjusted to maintain the stability of the negative pressure;

4) starting a high-temperature steam generator, and setting steam pressure and temperature parameters; controlling steam entering the test room through a seventh flowmeter; steam enters a laboratory through a left main steam valve and a right main steam valve; then the gas enters a recovery device through a gas extraction pipeline and a particle filtering device to maintain the steam environment of the laboratory; in addition, a vacuum pump is started, the negative pressure of the recovery device is maintained to be stable, the circulation of steam is ensured, and the operation environment of the steam turbine is simulated;

5) after all the parameters are set, the motor is started to bring the steam turbine to the corresponding rotating speed, and then a blade particle erosion test, a liquid drop erosion test and a salt deposit test are carried out.

Compared with the prior art, the technical scheme of the invention mainly has the following technical advantages:

the invention can realize the erosion test of the blades under different particle diameters, liquid drop diameters, spraying angles and speeds of the liquid drops and can realize the salt accumulation test of the turbine blades. The invention can carry out different experiments by using the same experiment system, has the advantages of multiple functions and strong applicability, and is particularly suitable for the research on the vibration aspect of the deep peak regulation turbine.

Drawings

FIG. 1 is a schematic diagram of the construction of the test system of the present invention.

In the figure, 1-laboratory, 11-steam turbine, 12-motor, 13-bearing, 14-coupling, 2-F2O3 particle tank, 21-first vibration device, 22-first electric valve, 23-first screening device, 24-first weighing machine, 25-first propulsion device, 3-F3O4 particle tank, 31-second vibration device, 32-second electric valve, 33-second screening device, 34-second weighing machine, 35-second propulsion device, 4-high frequency electric heating furnace, 5-mixer, 51-fifth flowmeter, 52-high pressure air tank, 6-sixth flowmeter, 61-first pressure regulating valve, 62-first speed regulating valve, 63-particle ejector, 7-high temperature steam generator, 71-a seventh flow meter, 73-a left main steam valve, 74-a right main steam valve, 75-a particle filtering device, 76-a recovering device, 77-a vacuum pump, 8-a constant pressure boiler, 80-a second flow meter, 81-a first flow meter, 82-a third flow meter, 83-a first electromagnetic valve, 84-a gas-liquid mixer, 85-a first electric valve, 86-a steam injection supercharger, 87-a second pressure regulating valve, 88-a second speed regulating valve, 89-a nozzle, 9-a brine evaporator, 91-a second electromagnetic valve, 92-a gas-liquid separator, 93-a third electromagnetic valve, 94-a fourth flow meter, 95-a second electric valve, 10-an oil tank, 102-an oil pump, 103-a first valve, 104-a bearing oil inlet pressure regulating valve, 106-second valve, 107-smoke exhaust fan.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, the system for testing erosion of a deep peaking turbine blade according to the present invention includes a turbine testing device, a particle erosion system, a droplet erosion system, a salt deposition system, a steam simulation system and a lubricating oil system, wherein the steam simulation system and the lubricating oil system are used in cooperation with the turbine testing device.

The steam turbine test equipment consists of a test room 1, a steam turbine 11 positioned in the test room, a coupler 14 and a motor 12, wherein two ends of a rotating shaft of the steam turbine 11 are installed on a bearing 13, an extending end of the rotating shaft is connected with the motor 12 through the coupler 14, and the rotating speed of the steam turbine 11 is adjusted through the motor 12 during testing.

In the steam simulation system, steam generated by the high-temperature steam generator 7 enters the laboratory 1 through the seventh flowmeter 71, the left main steam valve 73 and the right main steam valve 74. The return steam enters the recovery device 76 after passing through the steam extraction pipeline and the particle filtering device 75. The steam simulation system maintains the test environment of the steam turbine, and the recovery device 76 maintains negative pressure and is realized by a vacuum pump 77.

The lubricating oil system consists of an oil tank 10, an oil pump 102, a first valve 103 and a bearing oil inlet pressure regulating valve 104; oil in the oil tank 10 enters the bearing 13 through the oil pump 102 and the first valve 103, the pressure is adjusted through the bearing oil inlet pressure adjusting valve 104, and the bearing return oil returns to the oil tank 10 through the oil return pipeline.

The oil tank 10 is provided with a smoke exhaust fan 107 and a second valve 106, the smoke exhaust fan 107 is started to exhaust smoke in the oil tank, the micro negative pressure of the oil tank is maintained, and the opening degree of the second valve 106 is adjusted to adjust the negative pressure.

A pressure gauge is arranged on the bearing oil inlet pipeline, so that the pressure can be observed; and a thermometer is arranged on the oil return pipeline to observe the oil return condition.

The particle erosion system is made of Fe₂O₃ Granule tank 2, Fe₃O₄The particle tank 3, a first vibrating device 21, a second vibrating device 31, a first screening device 23, a second screening device 33, a first weighing machine 24, a second weighing machine 34, a first propulsion device 25, a second propulsion device 35, a high-frequency electric heating furnace 4, a mixer 5 and a particle ejector 63 which are arranged below the particle tank. The granules in the granule tank enter the screening device after passing through the vibrating device, the screened granules enter the propelling device through the weighing machine, the propelling device is used for pushing the granules into the high-frequency electric heating furnace 4, the high-frequency electric heating furnace 4 heats the granules, and the granules are heatedThe particles enter the mixer 5, and after being mixed by the mixer 5, the particles pass through the sixth flow meter 6, the first pressure regulating valve 61 and the first speed regulating valve 62 and then enter the particle ejector 63, and the particle ejector 63 ejects the particles into the test chamber 1 to carry out the particle erosion test. The screening device may set the particle diameter. Two particle tanks are used to store different types and sizes of particles. The mixer 5 is also connected with a high-pressure air tank 52, and air in the high-pressure air tank 52 enters the mixer 5 after passing through a fifth flow meter 51 to be fully mixed with the particles.

In the liquid drop erosion system, wet steam of the constant pressure boiler 8 enters a steam-liquid mixer 84 through a first flow meter 81, water enters the steam-liquid mixer 84 through a second flow meter 80 to be mixed, the mixed steam-liquid enters a steam jet supercharger 86 through a first electric valve 85 to be supercharged, and the supercharged steam-liquid enters a test room through a second pressure regulating valve 87, a second speed regulating valve 88 and a nozzle 89 to be subjected to a liquid drop erosion test; the wet steam of the constant pressure boiler 8 enters the mixer 5 through the third flow meter 82 and the first solenoid valve 83 to wet the particles.

The salt accumulation system comprises a brine evaporator 9, a second electromagnetic valve 91, a vapor-liquid separator 92, a third electromagnetic valve 93, a fourth flowmeter 94 and a second electric door 95 which are sequentially connected in series; the salt steam from the second electric valve 95 passes through the steam jet pressurizer 86, the pressure regulating valve 87, the speed regulating valve 88 and the nozzle 89 in sequence and enters a laboratory for salt deposition test.

The test method of the turbine blade erosion test system comprises the following steps:

1) assembling steam turbine test equipment: the steam turbine 11 is installed in the laboratory 1, the two ends of the rotating shaft are arranged on bearings 13, and the extending end of the rotating shaft is connected with the motor 12 through a coupling 14.

2) The oil tank 10 is filled with lubricating oil, the electric heater is started to heat the lubricating oil to a proper temperature, the first valve 103 is opened, the oil pump 102 is started to perform bearing oil feeding, and the bearing oil pressure is adjusted to a proper range through the bearing oil feeding pressure adjusting valve 104.

3) Meanwhile, the second valve 106 is opened, and the smoke exhaust fan 107 is started to maintain the pressure in the oil tank at negative pressure; when the negative pressure of the oil tank changes, the opening degree of the second valve 106 is adjusted to maintain the negative pressure to be stable.

4) Starting the high-temperature steam generator 7, and setting steam pressure and temperature parameters; the steam entering the laboratory is controlled by a seventh flow meter 71; steam enters the laboratory 1 through the left and right main steam valves 73, 74; then enters a recovery device 76 after passing through a steam extraction pipeline and a particle filtering device 75 to maintain the steam environment of the laboratory; in addition, a vacuum pump 77 is started, the negative pressure of the recovery device 76 is maintained to be stable, the steam circulation is ensured, and the operation environment of the steam turbine is simulated.

5) After all the parameters are set, the motor is started to bring the steam turbine to the corresponding rotating speed, and then a blade particle erosion test, a liquid drop erosion test and a salt deposit test are carried out.

When the particle erosion test of F2O3 is performed alone, the particles stored in the particle tank 2 first pass through the vibration device 21 and the first electric valve 22 and then enter the first screening device 23, and particles of different diameters are screened. Wherein first sieving mechanism 23 can set up particle screening diameter according to experimental demand, carries out turbine blade erosion test under the different particle diameters. The pellets then enter a first weigher 24 for weighing. The particles are weighed and then enter a first propelling device 25, the first propelling device 25 provides power for the movement of the particles, the particles are propelled into a high-frequency electric heating furnace 4 for heating, and the heated particles enter a mixer 5. The steam of the constant pressure boiler 8 passes through the third flow meter 82 and the first electromagnetic valve 83, and then enters the mixer 5 to humidify the particles.

The air in the high pressure air tank 52 passes through the fifth flow meter 51 and enters the mixer 5 to be sufficiently mixed with the particles. Different particle, air mixing ratio tests can be implemented by the fifth flow meter 51. In addition, the high pressure air also powers the particle motion. The particles pass through the sixth flow meter 6, the first pressure regulating valve 61, and the first speed regulating valve 62, and then enter the particle injector 63 for testing. Wherein the first speed regulating valve 62 can regulate the speed to carry out different impact speed tests, and the particle injector 63 can carry out different injection angle impact tests. The sixth flowmeter 6 can adjust the flow rate to perform flow rate tests under impact at different flow rates.

When the F3O4 pellet erosion test was performed alone, the test procedure was consistent with the above test procedure.

When the particle mixing test is carried out, the first weighing machine 24 and the second weighing machine 34 respectively carry out weighing, and different impact tests are carried out according to different mass mixing ratios. The particles are heated and mixed and then enter a laboratory for testing, and the erosion to the blades can be realized under different mixing ratios.

A particle tracker is installed in the laboratory, particle tracks are tracked by a Lagrange method, a PIV system is adopted to measure a two-dimensional velocity field of particles, and a remote monitoring system forms a real-time picture. The infrared device can observe the erosion condition of the blade in real time.

In the droplet erosion test, the constant pressure boiler 8 is heated to generate wet steam, the wet steam enters a steam-liquid mixer 84 through a valve and a first flow meter 81, and water enters the mixer through a second flow meter 80 to be mixed. Different gas-liquid mixing ratios can be set during the test to carry out the test. The vapor and liquid pass through the first electric valve 85 and enter the vapor jet supercharger 86 for supercharging, and the supercharged vapor and liquid pass through the second pressure regulating valve 87, the second speed regulating valve 88 and the nozzle 89 and enter the laboratory. Wherein the nozzle 89 can be set to different spray pressures and speeds for testing.

When the blade salt accumulation test is carried out, the brine evaporator 9 is started, the salt steam enters the steam-liquid separator 92 through the second electromagnetic valve 91 and is separated, the salt steam enters the steam-jet supercharger 86 through the third electromagnetic valve 93, the fourth flow meter 94, the second electric door 95 and the steam-jet supercharger 86 and is supercharged, and the supercharged gas enters a test room through the second pressure regulating valve 87, the second speed regulating valve 88 and the nozzle 89. Wherein the nozzle 89 can be set to different spray pressures and speeds for testing.

After the test is completed, the particles can be recovered by the recovery device 75.

Claims (10)

1. A depth peak regulation turbine blade erosion test system is characterized by comprising turbine test equipment, a particle erosion system and a liquid drop erosion system;

the steam turbine test equipment comprises a test room (1), a steam turbine (11) positioned in the test room, a coupler (14) and a motor (12), wherein two ends of a rotating shaft of the steam turbine (11) are arranged on a bearing (13), an extending end of the rotating shaft is connected with the motor (12) through the coupler (14), and the rotating speed of the steam turbine (11) is adjusted through the motor (12) during test;

the particle erosion system comprises a particle tank, a vibrating device, a screening device, a weighing machine, a propelling device, a high-frequency electric heating furnace, a mixer and a particle ejector, wherein particles in the particle tank enter the screening device after passing through the vibrating device, the screened particles enter the propelling device through the weighing machine, the propelling device is used for pushing the particles into the high-frequency electric heating furnace (4), the high-frequency electric heating furnace (4) heats the particles, the heated particles enter the mixer (5) and then enter the particle ejector (63), and the particle ejector (63) sprays the particles into the test chamber (1) for a particle erosion test;

the liquid drop erosion system comprises a constant pressure boiler (8), wet steam of the constant pressure boiler (8) enters a steam-liquid mixer (84) through a first flow meter (81), water enters the steam-liquid mixer (84) through a second flow meter (80) to be mixed, the mixed steam-liquid enters a steam jet supercharger (86) through a first electric valve (85) to be supercharged, and the supercharged steam-liquid enters a test room through a second pressure regulating valve (87), a second speed regulating valve (88) and a nozzle (89) to be subjected to a liquid drop erosion test; wet steam of the constant pressure boiler (8) enters the mixer (5) through the third flowmeter (82) and the first electromagnetic valve (83) to wet particles.

2. The system for testing the blade erosion of the deep peaking turbine according to claim 1, further comprising a salt accumulation system, wherein the salt accumulation system comprises a brine evaporator (9), a second electromagnetic valve (91), a vapor-liquid separator (92), a third electromagnetic valve (93), a fourth flow meter (94) and a second electric valve (95) which are sequentially connected in series; the salt steam from the second electric valve (95) flows through the steam jet supercharger (86), the second pressure regulating valve (87), the second speed regulating valve (88) and the nozzle (89) in sequence and then enters a laboratory for salt deposition test.

3. The system for testing the blade erosion of the deep peaking turbine according to claim 1 or 2, wherein the mixer (5) is further connected with a high pressure air tank (52), and air in the high pressure air tank (52) enters the mixer (5) after passing through a fifth flow meter (51) to be fully mixed with particles.

4. The system for testing the blade erosion of the deep peaking turbine according to claim 1 or 2, wherein the number of the particle tanks is at least two, and the number of the vibration devices, the screening devices, the weighing machines and the propelling devices is the same as the number of the particle tanks, so that at least two particle propelling lines are formed.

5. The system for testing erosion of a blade in a deep peaking turbine according to claim 1 or 2, wherein the particles mixed by the mixer (5) pass through a sixth flow meter (6), a first pressure regulating valve (61) and a first speed regulating valve (62) and then enter a particle injector (63).

6. The system for testing the erosion of the blades of the deep peaking turbine according to claim 1 or 2, further comprising a steam simulation system, wherein the steam simulation system comprises a high temperature steam generator (7), and steam generated by the high temperature steam generator (7) enters the test chamber (1) through a seventh flow meter (71), a left main steam valve (73) and a right main steam valve (74).

7. The system for testing erosion of blades of a deep peaking turbine according to claim 6, wherein the return steam enters the recovery device (76) after passing through the steam extraction pipeline and the particle filtering device (75), and the recovery device (76) maintains negative pressure and is realized by the vacuum pump (77).

8. The system for testing the erosion of the blades of the deep peaking turbine according to claim 1 or 2, further comprising a lubricating oil system, wherein the lubricating oil system comprises an oil tank (10), an oil pump (102), a first valve (103) and a bearing oil inlet pressure regulating valve; oil in the oil tank (10) enters the bearing (13) through the oil pump (102) and the first valve (103), the pressure is adjusted through the bearing oil inlet pressure adjusting valve, and the bearing return oil returns to the oil tank (10) through the oil return pipeline.

9. The system for testing the erosion of the blades of the deep peaking turbine according to claim 8, wherein a smoke exhaust fan (107) and a second valve (106) are installed on the oil tank (10), the smoke exhaust fan (107) is started to exhaust smoke in the oil tank, the micro negative pressure of the oil tank is maintained, and the opening degree of the second valve (106) is adjusted to adjust the negative pressure.

10. A method of testing a turbine blade erosion test system according to any one of claims 1 to 9, comprising the steps of:

1) assembling steam turbine test equipment;

2) lubricating oil is filled in the oil tank (10), the electric heater is started to heat the lubricating oil to a proper temperature, the first valve (103) is opened, the oil pump (102) is started to feed oil into the bearing, and the oil pressure of the bearing is adjusted to a proper range through the oil feed pressure adjusting valve of the bearing;

3) simultaneously, opening a second valve (106), and starting a smoke exhaust fan (107) to maintain the pressure in the oil tank at negative pressure; when the negative pressure of the oil tank changes, the opening degree of a second valve (106) is adjusted to maintain the negative pressure to be stable;

4) starting a high-temperature steam generator (7), and setting steam pressure and temperature parameters; controlling the steam entering the test chamber through a seventh flowmeter (71); steam enters the laboratory (1) through the left and right main steam valves (73) and (74); then enters a recovery device (76) through a steam extraction pipeline and a particle filtering device (75) to maintain the steam environment of the laboratory; in addition, a vacuum pump (77) is started to maintain the negative pressure of the recovery device (76) to be stable, so that the steam circulation is ensured, and the operating environment of the steam turbine is simulated;

5) after all the parameters are set, the motor is started to bring the steam turbine to the corresponding rotating speed, and then a blade particle erosion test, a liquid drop erosion test and a salt deposit test are carried out.

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