Turbine circulating water pump set test platform and turbine circulating water pump set test method

Abstract

The present application belongs to the technical field of energy power machinery, and particularly relates to a steam circulating water pump set test platform and a steam circulating water pump set test method, comprising a steam circulating water pump set, a circulating water system, an oil system, a main steam system, a steam seal system and an intelligent control system; through the cooperation of the above structure, the steam circulating water pump set intelligent test platform can provide a test verification device for the steam circulating water pump set, and through adjusting the PID parameters of the intelligent control system, the rapid and stable adjustment of each parameter can be realized; the test platform automatically adjusts the required working condition through the intelligent control system, allows the test work of the steam circulating water pump set under different working conditions, and the test data of the test platform can be used to verify the simulation model of the steam circulating water pump set, which is helpful for the numerical simulation research in the later stage and the optimization design of the pump set structure.

Description

Technical Field

[0001] This invention belongs to the field of energy and power machinery technology, specifically relating to a test platform for steam turbine circulating water pump sets and a test method for steam turbine circulating water pump sets. Background Technology

[0002] The turbine circulating water pump unit is an important component of marine propulsion systems. By controlling the speed of the turbine circulating water pump unit, it provides cooling water at different flow rates to the propulsion system, ensuring its safe operation. Due to the complex operating conditions of marine propulsion systems, conventional test platforms require frequent manual changes to the test conditions during full-condition testing of turbine circulating water pump units. This results in low levels of automation and cumbersome testing methods. Summary of the Invention

[0003] To solve the above-mentioned technical problems, a test platform and test method for turbine circulating water pump sets are provided.

[0004] The turbine circulating water pump unit test platform includes the turbine circulating water pump unit, circulating water system, lubricating oil system, main steam system, steam sealing system and intelligent control system;

[0005] The circulating water system includes an outlet valve, a water storage tank, a water replenishment valve, a pre-pump, and an inlet valve. The outlet valve is installed on the circulating water outlet pipe and is used to regulate the flow rate of the circulating water system. The water replenishment valve is used to replenish the water storage tank when the water level is low. The pre-pump and the inlet valve are installed on the circulating water inlet pipe and are used to regulate the inlet flow rate under gravity flow conditions.

[0006] Furthermore, the lubricating oil system includes a lubricating oil station, a flow regulating valve, an oil supply shut-off valve, an oil return shut-off valve, a check valve, a high-level oil tank shut-off valve, a high-level oil tank, and an overflow pipe. The lubricating oil station is connected to the turbine circulating water pump unit through an oil supply pipeline and an oil return pipeline. A branch pipe connects the oil supply pipeline and the oil return pipeline, and the flow regulating valve is located on the branch pipe to regulate the flow rate of lubricating oil entering the unit. The oil supply shut-off valve and the oil return shut-off valve are located on the oil supply pipeline and the oil return pipeline, respectively. Both valves are normally in the open state and can only be closed to prevent oil leakage when the pipeline is disassembled for inspection.

[0007] Furthermore, the high-level oil tank is connected to the oil supply pipeline. In the event of a malfunction in the lubrication station and inability to supply oil, the high-level oil tank supplies oil to the unit by gravity. The check valve on the oil supply pipeline is to prevent the oil in the high-level oil tank from flowing back to the lubrication station due to gravity, thus affecting the oil supply. Before the lubrication station stops operating normally, the high-level oil tank shut-off valve must be closed to prevent the lubricating oil in the high-level oil tank from being lost through the turbine circulating water pump unit. The high-level oil tank is also equipped with an overflow pipe connected to the lubrication station. When the oil level is too high, the excess lubricating oil can flow back to the lubrication station.

[0008] Furthermore, the main steam system includes a unit drain line, a main condenser, a check valve, a vacuum pump, a condensate pump, a condensate tank, a makeup water pump, a feed water pump, a boiler, an electric regulating valve, a desuperheating and pressure reducing device, a bypass condensate pump, and a drain line. The unit drain line is connected to the unit, and the unit drain water is directly discharged into the trench. The main condenser is connected to the exhaust steam outlet of the turbine circulating water pump group to convert the exhaust steam into condensate. The main condenser is also equipped with a check valve and a vacuum pump to remove air from the main condenser, prevent backflow of air, and maintain the vacuum level in the main condenser. The condensate pump is connected to the condensate outlet of the main condenser to send the condensate back to the condensate tank. The makeup water pump is connected to the condensate tank and is used to replenish the condensate tank when the liquid level is low. The boiler is the equipment used to generate the steam required for the experiment. The feed water pump is connected to the condensate tank and the boiler, and its main purpose is to provide condensate to the boiler.

[0009] Furthermore, the electric regulating valve, desuperheating and pressure reducing device, and bypass condenser work together to stabilize the pressure of the main steam supplied to the high-power turbine circulating water pump set. When the steam pressure increases, the opening of the electric regulating valve is increased. After passing through the desuperheating and pressure reducing device, the steam enters the bypass condenser, becomes condensate, and is then pumped to the condensate tank by the bypass condensate pump. The main steam system pipeline is also equipped with a drain pipeline, which is used to drain water from the main steam system pipeline during the initial stage of boiler startup.

[0010] Furthermore, the steam seal system comprises a steam seal supply shut-off valve, a steam seal pressure regulating valve, an electric valve, a steam seal cooler, and an axial flow exhaust fan. The outlet of the steam seal pressure regulating valve is connected to the steam seal supply interface of the turbine circulating water pump group, and the steam seal supply pressure is controlled by the steam seal pressure regulating valve. The steam seal cooler is connected to the steam seal exhaust interface of the turbine circulating water pump group. The steam seal pressure regulating valve is connected to the steam seal cooler through the shut-off valve. The axial flow exhaust fan draws out the air in the steam seal cooler, creating a slight negative pressure inside the steam seal cooler.

[0011] Furthermore, the intelligent control system includes a data acquisition unit, a data processing system, and a control system. The data acquisition unit is responsible for collecting various parameters of the test platform and the turbine circulating water pump group and transmitting the data to the data processing system. The data processing system is responsible for processing and converting the data and transmitting the processed data to the control system. The control system dynamically adjusts various parameters of the test platform based on the data.

[0012] This invention also discloses a test method for a turbine circulating water pump set test platform. The method uses the aforementioned turbine circulating water pump set test platform and includes the following steps:

[0013] S1: Operating Condition Test: Under operating conditions, the turbine circulating water pump group speed n, steam pressure Ps, steam temperature Ts, and circulating water flow rate Q are given in the control system. The control system first controls the boiler to start for boiler warm-up and opens the drain pipe to drain the main steam system. At the same time, it controls the lubricating oil system to start. When the steam pressure Ps and steam temperature Ts reach the set values, the drain pipe is automatically closed and the vacuum pump is automatically started to establish a vacuum. After the vacuum is established, the inlet valve and outlet valve are automatically opened and the unit is started. The data acquisition unit receives the feedback signals of circulating water flow rate Q, steam pressure Ps, and steam temperature Ts in real time and transmits the signals to the control system in real time. When all parameters meet the set requirements, the data processing system automatically records the circulating water flow rate Q, head H, and overall efficiency η at this time and gives the QH and Q-η curves.

[0014] During operational testing, given the turbine circulating water pump unit's rotational speed *n*, the intelligent control system automatically adjusts the circulating water flow rate parameter *Q* and records various parameters of the turbine circulating water pump unit. After calculation and processing, it provides the real-time QH curve between inlet flow rate and head, and the Q-η curve between flow rate and efficiency. The QH and Q-η curves are used to analyze whether the turbine circulating water pump unit meets the operating requirements and the overall efficiency. , where h in h out These are the enthalpy values ​​of the steam inlet and outlet, respectively, which are calculated in real time by the data processing system (35) using the steam parameters; Q s The steam flow rate can be directly acquired by the data acquisition unit (34); ρ is the density of the circulating water; g is the acceleration due to gravity; and H is the head of the turbine circulating water pump set. Where P2 is the circulating water outlet pressure, P1 is the circulating water inlet pressure, and v 2为 The circulating water outlet velocity and v1 are the circulating water inlet velocity, which can be directly collected by the data acquisition device (34). 泵 It can be obtained through actual measurement;

[0015] S2: Gravity Flow Test: Under gravity flow conditions, with a given circulating water flow rate Q in the control system, the control system first starts the lubricating oil system and opens the inlet and outlet valves. After the lubricating oil supply is normal and the inlet and outlet valves are fully open, the control system starts the booster pump. The data acquisition unit receives the circulating water flow rate Q feedback signal in real time and transmits the signal to the control system in real time. When the circulating water flow rate Q meets the set requirements, the data processing system automatically records the circulating water flow rate Q, the turbine circulating water pump unit speed n, and the water resistance H at this time. 阻 And give Q and H 阻 The relationship between n;

[0016] During the gravity flow test, given an inlet flow rate Q, the intelligent control system automatically adjusts the speed of the booster pump to change the inlet flow rate Q until the required inlet flow rate Q is met. After reaching the set operating condition, the system automatically records various parameters of the turbine circulating water pump set, and after calculation and processing, provides the inlet flow rate Q and gravity flow resistance H. 阻 Gravity rotation speed n 自 The relationship between the two was analyzed through data analysis of the self-flowing water resistance H. 阻 Does it meet the usage requirements under different flow rates? Water resistance Where P2 is the circulating water outlet pressure, P1 is the circulating water inlet pressure, v2 is the circulating water outlet velocity, and v1 is the circulating water inlet velocity, these can be directly acquired by a data acquisition device. 泵 It can be obtained through actual measurement.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The intelligent test platform for turbine circulating water pump set of the present invention can provide a test and verification device for turbine circulating water pump set;

[0019] 2. By adjusting the PID parameters of the intelligent control system, rapid and stable adjustment of each parameter can be achieved;

[0020] 3. The test platform automatically adjusts the required operating conditions through an intelligent control system, allowing for the testing of turbine circulating water pump sets under different operating conditions;

[0021] 4. The test data from this test platform can be used to verify the simulation model of the turbine circulating water pump set, which will help to carry out numerical simulation research in the later stage and optimize the design of the pump set structure.

[0022] 5. Based on this test platform and test method, the characteristic curves of the pump group under gravity flow conditions can be studied, and the most reasonable switching point of gravity flow conditions can be found, which will help improve the economy of the entire ship's power system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] In the diagram: 1. Turbine circulating water pump set; 2. Outlet valve; 3. Water storage tank; 4. Make-up water valve; 5. Boost pump; 6. Inlet valve; 7. Lubrication oil station; 8. Flow regulating valve; 9. Oil supply shut-off valve; 10. Oil return shut-off valve; 11. Check valve; 12. High-level oil tank shut-off valve; 13. High-level oil tank; 14. Overflow pipe; 15. Unit drain pipe; 16. Main condenser; 17. Check valve; 18. Vacuum pump; 19. Condensate pump 20. Condensate tank; 21. Makeup water pump; 22. Feed water pump; 23. Boiler; 24. Electric regulating valve; 25. Desuperheating and pressure reducing device; 26. Bypass condenser; 27. Bypass condensate pump; 28. Drainage pipeline; 29. ​​Steam seal steam supply shut-off valve; 30. Steam seal pressure regulating valve; 31. Electric valve; 32. Steam seal cooler; 33. Axial flow exhaust fan; 34. Data acquisition unit; 35. Data processing system; 36. Control system. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings.

[0026] Combination Figure 1 The present invention provides a test platform for a turbine circulating water pump set, comprising a turbine circulating water pump set 1, a circulating water system, a lubricating oil system, a main steam system, a steam sealing system, and an intelligent control system.

[0027] The circulating water system includes an outlet valve 2, a water storage tank 3, a water replenishment valve 4, a pre-pump 5, and an inlet valve 6. The outlet valve 2 is installed on the circulating water outlet pipeline and is used to regulate the flow rate of the circulating water system. The water replenishment valve 4 is used to replenish water to the water storage tank 3 when the liquid level is low. The pre-pump 5 and the inlet valve 6 are installed on the circulating water inlet pipeline and are used to regulate the inlet flow rate under gravity flow conditions.

[0028] The lubricating oil system includes a lubricating oil station 7, a flow regulating valve 8, an oil supply shut-off valve 9, an oil return shut-off valve 10, a check valve 11, a high-level oil tank shut-off valve 12, a high-level oil tank 13, and an overflow pipe 14. The lubricating oil station 7 is connected to the turbine circulating water pump unit 1 through the oil supply pipeline and the oil return pipeline. There is a branch pipe connecting the oil supply pipeline and the oil return pipeline. The flow regulating valve 8 is located on the branch pipe and is used to regulate the flow rate of lubricating oil entering the unit. The oil supply shut-off valve 9 and the oil return shut-off valve 10 are located on the oil supply pipeline and the oil return pipeline, respectively. The two valves are normally in the open state and can only be closed to prevent oil leakage when the pipeline is disassembled for inspection.

[0029] The high-level oil tank 13 is connected to the oil supply pipeline. In the event that the lubrication station 7 fails to supply oil, the high-level oil tank 13 supplies oil to the unit by gravity. The check valve 11 on the oil supply pipeline is to prevent the oil in the high-level oil tank 13 from flowing back to the lubrication station 7 due to gravity and affecting the oil supply. Before the lubrication station 7 stops working normally, the high-level oil tank shut-off valve 12 must be closed to prevent the lubricating oil in the high-level oil tank 13 from being lost through the turbine circulating water pump group 1. The high-level oil tank 13 is also equipped with an overflow pipe 14 connected to the lubrication station 7. When the oil level is too high, the excess lubricating oil can flow back to the lubrication station 7.

[0030] The main steam system includes a unit drain line 15, a main condenser 16, a check valve 17, a vacuum pump 18, a condensate pump 19, a condensate tank 20, a makeup water pump 21, a feed water pump 22, a boiler 23, an electric regulating valve 24, a desuperheating and pressure reducing device 25, a bypass condenser 26, a bypass condensate pump 27, and a drain line 28. The unit drain line 15 is connected to the unit, and the unit drain water is directly discharged into the trench. The main condenser 16 is connected to the exhaust steam outlet of the turbine circulating water pump group 1 to convert the exhaust steam into condensate. The main condenser 16 is also equipped with... There is a check valve 17 and a vacuum pump 18, which are used to remove air from the main condenser 16, prevent air backflow, and maintain the vacuum level in the main condenser 16; the condensate pump 19 is connected to the condensate outlet of the main condenser 16 and sends the condensate back to the condensate tank 20; the makeup water pump 21 is connected to the condensate tank 20 and is used to replenish the condensate tank 20 when the liquid level is low; the boiler 23 is a device used to generate the steam required for the test, and the feed water pump 22 is connected to the condensate tank 20 and the boiler 23. The main purpose of the feed water pump 22 is to provide condensate to the boiler 23.

[0031] The electric regulating valve 24, the desuperheating and pressure reducing device 25, and the bypass condenser 26 work together to stabilize the pressure of the main steam supplied to the high-power turbine circulating water pump group 1. When the steam pressure increases, the opening of the electric regulating valve 24 is increased. After passing through the desuperheating and pressure reducing device 25, the steam enters the bypass condenser 26, becomes condensate, and is then sent to the condensate tank 20 by the bypass condensate pump 27. The main steam system pipeline is also equipped with a drain pipe 28, which is used to drain the main steam system pipeline during the initial startup of the boiler 23.

[0032] The steam seal system includes a steam seal supply shut-off valve 29, a steam seal pressure regulating valve 30, an electric valve 31, a steam seal cooler 32, and an axial flow exhaust fan 33. The outlet of the steam seal pressure regulating valve 30 is connected to the steam seal supply interface of the turbine circulating water pump group 1. The steam seal supply pressure is controlled by the steam seal pressure regulating valve 30. The steam seal cooler 32 is connected to the steam seal extraction interface of the turbine circulating water pump group 1. The steam seal pressure regulating valve 30 is connected to the steam seal cooler 32 through the shut-off valve. The axial flow exhaust fan 33 draws away the air in the steam seal cooler 32, creating a slight negative pressure in the steam seal cooler 32.

[0033] The intelligent control system includes a data acquisition unit 34, a data processing system 35, and a control system 36. The data acquisition unit 34 is responsible for collecting various parameters of each system of the test platform and the turbine circulating water pump group 1 and transmitting the data to the data processing system 35. The data processing system 35 is responsible for processing and converting the data and transmitting the processed data to the control system 36. The control system 36 dynamically adjusts various parameters of the test platform according to the data. The control system is connected to other systems through cables and transmits electrical signals to realize the control function.

[0034] This invention also discloses a test method for a turbine circulating water pump set test platform. This method utilizes the aforementioned turbine circulating water pump set test platform, employing an intelligent test platform that can automatically analyze parameters. By analyzing key parameters such as the head, water resistance, speed, steam inlet and outlet pressure and temperature, and unit efficiency of the turbine circulating water pump set 1, it evaluates whether the turbine circulating water pump set 1 meets the usage requirements. The method includes the following steps:

[0035] S1: Operating condition test: Under operating conditions, the turbine circulating water pump group 1 speed n, steam pressure Ps, steam temperature Ts, and circulating water flow rate Q are given in the control system 36. The control system 36 first controls the boiler 23 to start for boiler warm-up and opens the drain pipe 28 to drain the main steam system. At the same time, it controls the lubricating oil system to start. When the steam pressure Ps and steam temperature Ts reach the set values, the drain pipe 28 is automatically closed. At the same time, the vacuum pump 18 is automatically started to establish a vacuum. After the vacuum is established, the inlet valve 6 and outlet valve 2 are automatically opened and the unit is started. The data acquisition unit 34 receives the feedback signals of circulating water flow rate Q, steam pressure Ps, and steam temperature Ts in real time and transmits the signals to the control system 36 in real time. When all parameters meet the set requirements, the data processing system 35 automatically records the circulating water flow rate Q, head H, and overall efficiency η at this time and gives the QH and Q-η curves.

[0036] During operational testing, given the rotational speed n of turbine circulating water pump unit 1, the intelligent control system automatically adjusts the circulating water flow rate Q parameter and records various parameters of turbine circulating water pump unit 1. After calculation and processing, it provides the QH curve between inlet flow rate and head, and the Q-η curve between flow rate and efficiency in real time. The QH and Q-η curves are used to analyze whether turbine circulating water pump unit 1 meets the usage requirements and its overall efficiency. , where h in h out These are the enthalpy values ​​of the steam inlet and outlet, respectively, which are calculated in real time by the data processing system 35 using steam parameters; Q s The steam flow rate can be directly acquired by data acquisition device 34; ρ is the density of circulating water; g is the acceleration due to gravity; H is the head of turbine circulating water pump set 1. Where P2 is the circulating water outlet pressure, P1 is the circulating water inlet pressure, and v 2为 The circulating water outlet velocity and v1 are the circulating water inlet velocity, which can be directly collected by the data acquisition device 34. 泵 It can be obtained through actual measurement;

[0037] S2: Gravity Flow Test: Under gravity flow conditions, with the circulating water flow rate Q given in the control system 36, the control system 36 first controls the lubricating oil system to start, and the inlet valve 6 and outlet valve 2 to open. After the lubricating oil supply is normal and the inlet valve 6 and outlet valve 2 are fully opened, the control system 36 starts the booster pump 5. The data acquisition unit 34 receives the circulating water flow rate Q feedback signal in real time and transmits the signal to the control system 36 in real time. When the circulating water flow rate Q meets the set requirements, the data processing system 35 automatically records the circulating water flow rate Q, the turbine circulating water pump group 1 speed n, and the water resistance H at this time. 阻 And give Q and H 阻 The relationship between n;

[0038] During the gravity flow test, given an inlet flow rate Q, the intelligent control system automatically adjusts the speed of the booster pump 5 to change the inlet flow rate Q until the required inlet flow rate Q is met. After reaching the set operating condition, the system automatically records various parameters of the turbine circulating water pump set 1, and after calculation and processing, provides the inlet flow rate Q and gravity flow resistance H. 阻 Gravity rotation speed n 自 The relationship between the two was analyzed through data analysis of the self-flowing water resistance H. 阻 Does it meet the usage requirements under different flow rates? Water resistance Where P2 is the circulating water outlet pressure, P1 is the circulating water inlet pressure, v2 is the circulating water outlet velocity, and v1 is the circulating water inlet velocity, these can be directly acquired by the data acquisition device 34. 泵 It can be obtained through actual measurement.

[0039] The working principle of the experimental platform of this invention is as follows:

[0040] S1: The intelligence of this test platform is achieved by the intelligent control system. After the data acquisition unit 34 receives the parameters, the data processing system 35 is responsible for processing and converting the data, and displaying the characteristic curves according to the requirements. The control system 36 is responsible for presetting, receiving and adjusting the parameters of the test platform and the turbine circulating water pump group 1, and adjusting the parameters in real time to ensure that the parameters are within the preset value range. By adjusting the PID parameters in the control system 36, the stable and rapid adjustment of the parameters can be achieved.

[0041] S2: After receiving the electrical signal from the control system 36, the boiler 23 automatically adjusts the combustion rate, heats the condensate into steam according to the preset parameters, and provides the steam required for operation to the turbine circulating water pump group 1 stably and continuously; the data acquisition unit 34 collects the steam pressure P in real time. s The signal is transmitted to the data processing system 35 and the control system 36; when the steam pressure P s When the pressure is reduced, boiler 23 receives an electrical signal from control system 36 and automatically increases the combustion rate to increase steam pressure P. s The purpose is to reduce steam pressure P when the steam pressure increases. The electric regulating valve 24 receives an electrical signal from the control system 36 and automatically increases the valve opening, allowing excess steam to pass through the desuperheating and pressure-reducing device 25 and enter the bypass condenser 26. s Similarly, by adjusting the superheat parameter of boiler 23 through the control system 36, the steam temperature T can be controlled. s Under the control of the system, condensate pump 19, make-up water pump 21, and bypass condensate pump 27 replenish water to condensate tank 20, and send the condensate back to boiler 23 through feed water pump 22 to ensure that boiler 23 can operate continuously.

[0042] S3: The control system 36 controls the opening of the steam seal pressure regulating valve 30 to adjust the steam seal supply pressure P. 供 The steam seal pressure regulating valve 30 is connected to the steam seal cooler 32 via an electric valve 31. After the steam is cooled into condensate by the steam seal cooler 32, the axial flow exhaust fan 33 draws away the air inside the steam seal cooler 32, creating a slight negative pressure P inside the steam seal cooler 32. 抽 The slight negative pressure P is controlled by adjusting the opening degree of the electric valve 31. 抽 Size;

[0043] S4: Under normal circumstances, lubrication station 7 provides the unit with the lubricating oil required for operation. The high-level oil tank 13 is connected to the oil supply pipeline. In the event of a malfunction in lubrication station 7, the high-level oil tank 13 supplies oil to the unit by gravity. The check valve 11 on the oil supply pipeline is to prevent oil in the high-level oil tank 13 from flowing back to lubrication station 7 due to gravity, thus affecting the oil supply. Before lubrication station 7 stops operating normally, the high-level oil tank shut-off valve 12 must be closed to prevent lubricating oil in the high-level oil tank 13 from being lost through the turbine circulating water pump set 1. The high-level oil tank 13 is also equipped with an overflow pipe 14 connected to lubrication station 7. When the oil level is too high, excess lubricating oil can flow back to lubrication station 7. The lubricating oil flow rate Q... 油 After the signal is processed by the data acquisition unit 34 and the data processing system 35, the electrical signal is transmitted to the control system 36. The control system 36 controls the opening of the flow regulating valve 8 to ensure the flow rate Q of lubricating oil entering the unit. 油 Within a given range;

[0044] S5: The reservoir 3 supplies the circulating water required for the turbine circulating water pump set 1 during operation. The control system 36 controls the opening degree of the outlet valve 2, the inlet valve 6, and the speed n of the booster pump 5. 前 Control the flow rate of circulating water.

Claims

1. A test method for a steam turbine circulating water pump set test platform, comprising the following steps: S1: operating condition test: under the operating condition, the rotating speed n, the steam pressure Ps, the steam temperature Ts and the circulating water flow Q of the steam turbine circulating water pump set (1) are given in the control system (36), the control system (36) first controls the boiler (23) to start warming up, opens the drain pipeline (28) to drain the main steam system, and controls the oil system to start, when the steam pressure Ps and the steam temperature Ts reach the set value, the drain pipeline (28) is automatically closed, and the vacuum pump (18) is automatically started to establish a vacuum, after the vacuum is established, the inlet valve (6) and the outlet valve (2) are automatically controlled to be opened, the unit is started, the data collector (34) receives the circulating water flow Q, the steam pressure Ps and the steam temperature Ts feedback signals in real time, and transmits the signals to the control system (36) in real time, when all parameters meet the set requirements, the data processing system (35) automatically records the circulating water flow Q, the head H and the overall efficiency η at this time and gives the Q-H and Q-η curves; When the running condition test is performed, the speed n of the steam circulating water pump set (1) is given, the intelligent control system automatically adjusts the circulating water flow Q parameter, and records various parameters of the steam circulating water pump set (1), and after calculation and processing, the Q-H curve between the inlet flow and the head and the Q-η curve between the flow and the efficiency are given in real time, whether the steam circulating water pump set (1) meets the use requirement is analyzed through the Q-H and Q-η curves, and the overall efficiency wherein h in , h out are respectively the steam inlet and outlet enthalpy values, which are obtained by the steam parameter in real time by the data processing system (35); Q s is the steam flow, which is directly collected by the data collector (34); ρ is the circulating water density; g is the gravity acceleration; H is the head of the steam circulating water pump set (1), and the head wherein P2 is the circulating water outlet pressure, P1 is the circulating water inlet pressure, v2 is the circulating water outlet speed, v1 is the circulating water inlet speed, which are directly collected by the data collector (34), h 泵 is obtained by actual measurement, and h 泵 is the height difference between the center line of the drain and the inlet section. S2: self-flow condition test: under the self-flow condition, the circulating water flow rate Q is given in the regulation system (36), the regulation system (36) first controls the oil system to start, the inlet valve (6) and the outlet valve (2) to open, the oil supply is normal, and after the inlet valve (6) and the outlet valve (2) are opened, the regulation system (36) starts the pre-pump (5), the data collector (34) receives the circulating water flow rate Q feedback signal in real time, and transmits the signal to the regulation system (36) in real time, when the circulating water flow rate Q meets the set requirement, the data processing system (35) automatically records the circulating water flow rate Q, the steam circulating water pump group (1) speed n and the water resistance H at this time 阻 and gives the relationship between Q, H 阻 , n; When the self-flow condition test is performed, the intelligent control system automatically adjusts the rotating speed of the front pump (5) to change the inlet flow Q until the requirement of the inlet flow Q is met. After reaching the set condition, the system automatically records various parameters of the steam turbine circulating water pump set (1), and after calculation and processing, the relationship between the inlet flow Q, the self-flow water resistance H 阻 , and the self-flow rotating speed n 自 is given. Through data analysis, whether the self-flow water resistance H 阻 meets the use requirement under different flows is determined, and the water resistance is calculated, wherein P2 is the circulating water outlet pressure, P1 is the circulating water inlet pressure, v 2为 is the circulating water outlet speed, v1 is the circulating water inlet speed, h 泵 is directly collected by the data collector (34), and h 泵 is the height difference between the center line of the drain and the water inlet section, which is obtained by actual measurement.

2. The test method of claim 1, wherein, The test platform comprises a steam turbine circulating water pump set (1), a circulating water system, an oil system, a main steam system, a steam seal system and an intelligent control system. The circulating water system comprises an outlet valve (2), a water storage tank (3), a water supply valve (4), a pre-pump (5) and an inlet valve (6), the outlet valve (2) is installed on the circulating water outlet pipeline and is used for adjusting the circulating water system flow, the water supply valve (4) is used for supplying water to the water storage tank (3) when the water level of the water storage tank (3) is low, and the pre-pump (5) and the inlet valve (6) are installed on the circulating water inlet pipeline and are used for adjusting the inlet flow under the self-flowing condition.

3. The test method of claim 2, wherein, The oil system comprises a lubricating oil station (7), a flow regulating valve (8), a supply oil stop valve (9), a return oil stop valve (10), a check valve (11), a high oil tank stop valve (12), a high oil tank (13) and an oil overflow pipe (14), the lubricating oil station (7) is connected with the steam turbine circulating water pump set (1) through the oil supply pipeline and the oil return pipeline, a branch pipe is connected between the oil supply pipeline and the oil return pipeline, the flow regulating valve (8) is located on the branch pipe and is used for adjusting the lubricating oil flow entering the unit; the supply oil stop valve (9) and the return oil stop valve (10) are respectively located on the oil supply pipeline and the oil return pipeline.

4. The test method of claim 3, wherein, The high oil tank (13) is connected with the oil supply pipeline; the high oil tank (13) is also provided with the oil overflow pipe (14) connected with the lubricating oil station (7), and when the oil level is too high, the excess lubricating oil flows back to the lubricating oil station (7).

5. The test method of claim 4, wherein, The main steam system comprises a unit drain pipeline (15), a main condenser (16), a check valve (17), a vacuum pump (18), a condensate pump (19), a condensate tank (20), a make-up water pump (21), a feed water pump (22), a boiler (23), an electric regulating valve (24), a desuperheating and pressure reducing device (25), a bypass condenser (26), a bypass condensate pump (27) and a drain pipeline (28), the unit drain pipeline (15) is connected with a unit, and unit drain is directly discharged into a ditch; the main condenser (16) is connected with a steam turbine circulating water pump group (1) exhaust outlet, and is used for changing exhaust steam into condensate water; the main condenser (16) is simultaneously provided with the check valve (17) and the vacuum pump (18), which are used for pumping away air in the main condenser (16) to prevent air backflow and maintain vacuum degree in the main condenser (16); the condensate pump (19) is connected with a condensate outlet of the main condenser (16), and sends condensate back to the condensate tank (20); the make-up water pump (21) is connected with the condensate tank (20), and is used for supplying water to the condensate tank (20) when the liquid level of the condensate tank (20) is low; the boiler (23) is used for generating steam required by the test; the feed water pump (22) is connected with the condensate tank (20) and the boiler (23), and the main purpose of the feed water pump (22) is to provide condensate water for the boiler (23).

6. The test method of claim 5, wherein, The electric regulating valve (24), the desuperheating and pressure reducing device (25) and the bypass condenser (26) are arranged between the steam turbine circulating water pump group (1) and the condensate tank (20); the main steam system pipeline is further provided with the drain pipeline (28).

7. The test method of claim 6, wherein, The steam seal system comprises a steam seal steam supply stop valve (29), a steam seal pressure regulating valve (30), an electric valve (31), a steam seal cooler (32) and an axial flow air extractor (33), the steam seal pressure regulating valve (30) is connected with a steam seal steam supply interface of the steam turbine circulating water pump group (1), the steam seal pressure regulating valve (30) controls steam seal steam supply pressure, the steam seal cooler (32) is connected with a steam seal steam extraction interface of the steam turbine circulating water pump group (1), the steam seal pressure regulating valve (30) is connected with the steam seal cooler (32) through the steam seal steam supply stop valve (29), and the axial flow air extractor (33) pumps away air in the steam seal cooler (32) to generate micro negative pressure in the steam seal cooler (32).

8. The test method of claim 7, wherein, The intelligent control system comprises a data collector (34), a data processing system (35) and a control system (36), the data collector (34) is responsible for collecting various parameters of each system of the test platform and the steam turbine circulating water pump group (1) and transmitting data to the data processing system (35), the data processing system (35) is responsible for processing and converting data and transmitting processed data to the control system (36), and the control system (36) dynamically adjusts various parameters of the test platform according to data.

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