Radial centrifugal turbine oil station system for MW-level ORC power generation

Abstract

The utility model discloses a radial centrifugal turbine oil station system for MW-level ORC power generation, which comprises an evaporator, a turbine expander, a generator, a condenser, a working medium pump, an oil station and a turbine bearing, and the oil station comprises a sealing oil system and a lubricating oil system; the sealing oil system comprises a sealing oil tank, a sealing oil supply pipeline and a sealing oil return pipeline; the lubricating oil system comprises a lubricating oil tank, a lubricating oil supply pipeline and a lubricating oil return pipeline, compared with the prior art, two oil circulation systems are achieved on the same skid, and the overall lubricating effect and sealing performance are effectively improved; oil is supplied through completely isolated flow channels, the risk of mixing is avoided, working parameters of sealing oil or lubricating oil can be independently set, and control and adjustment of respective systems are carried out.

Description

Technical Field

[0001] The utility model relates to the field of organic Rankine cycle power generation equipment, in particular to a radial centrifugal turbine oil station system for MW-level ORC power generation. Background Art

[0002] Organic Rankine cycle (ORC) is a technology that uses the low boiling point of organic matter to convert low-grade industrial waste heat or geothermal heat into electrical energy. The main devices include: turbine generator, condenser, working fluid pump and evaporator. The thermoelectric conversion process mainly occurs in the turbine generator. The high-temperature and high-pressure organic gas expands and works in the turbine, driving the impeller to rotate, and then drives the generator to generate electricity through the coupling. Due to the friction of the rotating parts and the high and low pressure differences with the outside, the transmission parts such as bearings and the dynamic and static matching gaps need to be sealed and lubricated, and oil seals and oil lubrication are usually used. Selecting the appropriate oil type and designing the oil system according to the operating temperature, environment, and bearing and sealing form has an important impact on the expansion efficiency of the turbine and the power generation efficiency of the unit.

[0003] At present, in integrated turbine generators, the same oil is often used for sealing and lubrication due to their integrated design. In large MW-class ORC generator sets, most of them also use the same oil considering the difficulty of oil station design. Utility Model Content

[0004] The purpose of the utility model is to provide a radial centrifugal turbine oil station system for MW-class ORC power generation, in view of the fact that most of the integrated turbine generators or large MW-class ORC generator sets use the same oil for sealing and lubrication.

[0005] In order to achieve the above objectives, the utility model adopts the following technical solutions:

[0006] A radial centrifugal turbine oil station system for MW-class ORC power generation, comprising an evaporator, a turbine expander, a generator, a condenser, a working fluid pump, an oil station and a turbine bearing, wherein the oil station comprises a sealing oil system and a lubricating oil system; the sealing oil system comprises a sealing oil tank, a sealing oil supply pipeline and a sealing oil return pipeline; the lubricating oil system comprises a lubricating oil tank, a lubricating oil supply pipeline and a lubricating oil return pipeline;

[0007] The sealing oil tank supplies oil to the working fluid pump and the turbine bearing through the sealing oil supply pipeline, and the sealing oil in the working fluid pump and the turbine bearing flows back to the sealing oil tank through the sealing oil return pipeline;

[0008] The lubricating oil tank supplies oil to the turbine bearing through the lubricating oil supply pipeline, and the lubricating oil in the turbine bearing flows back to the lubricating oil tank through the lubricating oil return pipeline.

[0009] As a further preference of the utility model, the tops of the sealed oil tank and the lubricating oil tank are both provided with oil filling ports and air drying filters, and partitions are provided inside to separate the sealed oil tank and the lubricating oil tank into an oil supply room and an oil return room, respectively; the oil supply room of the sealed oil tank and the oil supply room of the lubricating oil tank are both provided with liquid level gauges and electric heating devices.

[0010] As a further preferred embodiment of the present invention, a pneumatic pump and a first electric pump are provided in the oil supply room of the sealing oil tank, one end of the sealing oil supply pipeline is connected to the sealing oil inlet of the turbine bearing and the working fluid pump, and the other end is connected to the oil supply room of the sealing oil tank through the pneumatic pump or the first electric pump, a first oil cooler and a first filter are provided on the sealing oil supply pipeline, the pneumatic pump and the first electric pump are respectively connected to the inlet of the first oil cooler through the first check valve, the outlet of the first oil cooler is connected to the first filter, and the outlet of the first filter is connected to the sealing oil inlet of the turbine bearing and the working fluid pump through the second check valve;

[0011] One end of the sealing oil return pipeline is connected to the sealing oil outlet of the working fluid pump and the turbine bearing, and the other end is connected to the return oil room of the sealing oil tank; a third three-way valve is arranged on the sealing oil return pipeline, and a first oil return branch and a second oil return branch are formed by the third three-way valve, and both the first oil return branch and the second oil return branch are connected to the return oil room of the sealing oil tank, and the first oil return branch returns oil directly; the second oil return branch is divided into a first pressure control branch and a second pressure control branch through a pipeline; a second safety valve is arranged on the first pressure control branch, and pressure control oil return is performed through the second safety valve; a solenoid valve and a pressure control valve are arranged on the second pressure control branch, and pressure control oil return is performed through the pressure control valve.

[0012] As a further preferred embodiment of the utility model, a first three-way valve is arranged between the outlet of the first oil cooler and the first filter, and the bypass of the first three-way valve is connected with the front end of the inlet of the first oil cooler through a pipeline; a third pressure control branch is arranged at the front end of the inlet of the first oil cooler, and the third pressure control branch is connected to the return oil room of the sealed oil tank, and a first safety valve is arranged on the third pressure control branch, and the pressure return oil is controlled by the first safety valve; a third safety valve is arranged between the second check valve and the turbine bearing and between the second check valve and the working fluid pump, and the third safety valve is connected to the return oil room of the sealed oil tank through a pipeline, and the pressure return oil is controlled by the third safety valve.

[0013] As a further preferred embodiment of the present invention, a debugging hand valve is provided between the pneumatic pump and the first check valve, and the other end of the debugging hand valve is connected to the oil return room of the sealing oil tank through a hose.

[0014] As a further preferred embodiment of the present invention, a buffer tank is provided on one end of the sealing oil return pipeline close to the working fluid pump.

[0015] As a further preferred embodiment of the present invention, a first filter is arranged in parallel below the first filter, and the two parallel first filters are connected to the first oil cooler through a second three-way valve.

[0016] As a further preferred embodiment of the present invention, an oil return channel is provided on the turbine bearing, and an oil recovery tank is provided on the oil return channel.

[0017] As a further preferred embodiment of the present invention, a second electric pump is provided in the oil supply room of the lubricating oil tank, one end of the lubricating oil supply pipeline is connected to the second electric pump, and the other end is connected to the lubricating oil inlet of the turbine bearing, a second oil cooler and a second filter are provided on the lubricating oil supply pipeline, the second electric pump is connected to the inlet of the second oil cooler through a fourth check valve, the outlet of the second oil cooler is connected to the second filter, a second filter is provided in parallel below the second filter, and the two parallel second filters are connected to the second oil cooler through a fifth three-way valve; the outlet of the second filter is connected to the lubricating oil inlet of the turbine bearing through a third check valve;

[0018] One end of the lubricating oil return pipeline is connected to the lubricating oil outlet of the turbine bearing, and the other end is connected to the return oil room of the lubricating oil tank for direct oil return. A sight glass is provided on the lubricating oil return pipeline.

[0019] As a further preferred embodiment of the utility model, a fourth three-way valve is arranged between the outlet of the second oil cooler and the second filter, and the bypass of the fourth three-way valve is connected with the front end of the inlet of the second oil cooler through a pipeline; a fourth pressure control branch is arranged at the front end of the inlet of the second oil cooler, and the fourth pressure control branch is connected to the return oil room of the lubricating oil tank, and a fourth safety valve is arranged on the fourth pressure control branch, and the pressure return oil is controlled by the fourth safety valve; a fifth safety valve is arranged between the third check valve and the turbine bearing, and the fifth safety valve is connected to the return oil room of the lubricating oil tank through a pipeline, and the pressure return oil is controlled by the fifth safety valve.

[0020] The radial centrifugal turbine oil station system for MW-level ORC power generation proposed in the utility model has the following beneficial effects compared with the prior art:

[0021] 1. The utility model realizes two oil circulation systems on the same skid, which effectively improves the overall lubrication effect and sealing performance;

[0022] 2. The utility model supplies oil separately through completely isolated flow channels, without the risk of mixing, and can also independently set the working parameters of sealing oil or lubricating oil to control and adjust their respective systems;

[0023] 3. By setting an oil return channel on the working medium side of the radial centrifugal turbine mechanical seal group, the mixture of the sealing oil and a small amount of working medium leaking to the working medium side can be recovered to the oil recovery tank to avoid oil leakage;

[0024] 4. By installing an electric heating device in the oil tank, the oil can be fully heated to prevent poor sealing or lubrication effects caused by insufficient oil temperature;

[0025] 5. By installing an air drying filter on the oil tank, the water content in the oil can be effectively reduced and the oil tank can be kept at normal pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the principle of the utility model;

[0027] Figure 2 It is a structural schematic diagram of the utility model.

[0028] The meanings of the reference numerals in the figure are as follows: 1. evaporator, 2. turbine expander, 3. generator, 4. condenser, 5. working fluid pump, 6. oil station, 7. turbine bearing, 8. sealing oil tank, 9. lubricating oil tank, 10. oil filling port, 11. air drying filter, 12. liquid level gauge, 13. electric heating device, 14. baffle, 15. pneumatic pump, 16. first electric pump, 17. second electric pump, 18. first check valve, 19. first safety valve, 20. First oil cooler, 21. First three-way valve, 22. Second three-way valve, 23. First filter, 24. Second check valve, 25. Third safety valve, 26. Debugging manual valve, 27. Buffer tank, 28. Third three-way valve, 29. Second safety valve, 30. Solenoid valve, 31. Pressure control valve, 32. Oil recovery tank, 33. Sight glass, 34. Second oil cooler, 35. Second filter, 36. Fourth three-way valve, 37. Fourth safety valve, 38. Third check valve, 39. Fifth safety valve, 40. Fifth three-way valve, 41. Fourth check valve. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] This system is based on the particularity of the radial centrifugal turbine structure. The turbine and generator are split structures. While considering the lubrication of the bearing mechanical group, double-end mechanical seals are also selected for medium sealing. According to the design calculation results of bearings, mechanical seals and other components, the physical properties required for sealing oil and lubricating oil are different, so two different types of oil must be selected.

[0031] Embodiment 1, combined with Figure 1-Figure 2A radial centrifugal turbine oil station system for MW-level ORC power generation includes an evaporator 1, a turbine expander 2, a generator 3, a condenser 4, a working fluid pump 5, an oil station 6 and a turbine bearing 7. The oil station 6 includes a sealing oil system and a lubricating oil system; the sealing oil system includes a sealing oil tank 8, a sealing oil supply pipeline and a sealing oil return pipeline; the lubricating oil system includes a lubricating oil tank 9, a lubricating oil supply pipeline and a lubricating oil return pipeline.

[0032] Among them, the sealing oil tank 8 supplies oil to the working fluid pump 5 and the turbine bearing 7 through the sealing oil supply pipeline, and the sealing oil in the working fluid pump 5 and the turbine bearing 7 flows back to the sealing oil tank 8 through the sealing oil return pipeline; the lubricating oil tank 9 supplies oil to the turbine bearing 7 through the lubricating oil supply pipeline, and the lubricating oil in the turbine bearing 7 flows back to the lubricating oil tank 9 through the lubricating oil return pipeline.

[0033] The tops of the sealed oil tank 8 and the lubricating oil tank 9 are both provided with oil filling ports 10 and air drying filters 11 to reduce the water content in the oil and keep the oil tanks at normal pressure; partitions are provided inside to separate the sealed oil tank 8 and the lubricating oil tank 9 into an oil supply compartment and an oil return compartment, respectively, to optimize the flow paths of oil supply and oil return, and to prevent the oil pump from sucking empty. When the oil level in the oil return tank exceeds the height of the baffle 14, the oil overflows into the oil supply compartment and is transported to each working unit through the oil pump; the oil supply compartment of the sealed oil tank 8 and the oil supply compartment of the lubricating oil tank 9 are both provided with liquid level gauges 12 and electric heating devices 13, and the liquid level The meter 12 is used to observe the oil volume and increase the oil temperature; the electric heating device 13 is arranged in the oil supply room to fully heat the oil to prevent poor sealing or lubrication effects caused by insufficient oil temperature; a pneumatic pump 15 and a first electric pump 16 are arranged in the oil supply room of the sealed oil tank 8, and a debugging hand valve 26 is arranged between the pneumatic pump 15 and the first check valve 18. The other end of the debugging hand valve 26 is connected to the return oil room of the sealed oil tank 8 through a hose. The pneumatic pump 15 is usually in an inoperative state as a backup pump. The backup pump is to prevent the leakage of the working fluid due to the inability to provide sealing oil pressure when the oil pump fails.

[0034] One end of the sealing oil supply pipeline is connected to the sealing oil inlet of the turbine bearing 7 and the working fluid pump 5, and the other end is connected to the oil supply room of the sealing oil tank 8 through the pneumatic pump 15 or the first electric pump 16. The sealing oil supply pipeline is provided with a first oil cooler 20 and a first filter 23. The pneumatic pump 15 and the first electric pump 16 are respectively connected to the inlet of the first oil cooler 20 through the first check valve 18. In order to adjust the oil temperature, the first oil cooler 20 controls the first three-way valve 21 through the temperature signal feedback; when the oil temperature is too high, the first oil cooler 20 pipeline is opened and the bypass pipeline is closed for cooling; the outlet of the first oil cooler 20 is connected to the first filter 23, a first filter 23 is arranged in parallel below the first filter 23, and two parallel first filters 23 are connected to the first oil cooler 20 through the second three-way valve 22, and the precision of the first filter 23 is 3 microns; the outlet of the first filter 23 is connected to the sealing oil inlet of the turbine bearing 7 and the working fluid pump 5 through the second check valve 24.

[0035] A first three-way valve 21 is provided between the outlet of the first oil cooler 20 and the first filter 23, and the bypass of the first three-way valve 21 is connected to the front end of the inlet of the first oil cooler 20 through a pipeline; a third pressure control branch is provided at the front end of the inlet of the first oil cooler 20, and the third pressure control branch is connected to the oil return room of the sealing oil tank 8, and a first safety valve 19 is provided on the third pressure control branch, and the pressure return oil is controlled through the first safety valve 19; a third safety valve 25 is provided between the second check valve 24 and the turbine bearing 7, and between the second check valve 24 and the working fluid pump 5, and the third safety valve 25 is connected to the oil return room of the sealing oil tank 8 through a pipeline, and the pressure return oil is controlled through the third safety valve 25. When the oil pressure is greater than the set value, part of the oil is returned to the sealing oil return room by opening the first safety valve 19 or the third safety valve 25 to prevent overpressure in the pipeline.

[0036] One end of the sealing oil return pipeline is connected to the sealing oil outlet of the working fluid pump 5 and the turbine bearing 7, and the other end is connected to the return oil room of the sealing oil tank 8; a buffer tank 27 is arranged on the end of the sealing oil return pipeline close to the working fluid pump 5, and the buffer tank 27 is used to stabilize the oil pressure in the turbine mechanical seal group, replenish a part of the pressure when the pressure of the sealing oil return pipeline is low, and absorb a part of the pressure when the pressure of the sealing oil return pipeline is high; a third three-way valve 28 is arranged on the sealing oil return pipeline, and a first oil return branch and a second oil return branch are formed by the third three-way valve 28. The first oil return branch and the second oil return branch are both connected to the return oil room of the sealing oil tank 8, and the first oil return branch returns oil directly; the second oil return branch is divided into a first pressure control branch and a second pressure control branch through a pipeline; a second safety valve 29 is arranged on the first pressure control branch, and pressure control oil return is performed through the second safety valve 29; an electromagnetic valve 30 and a pressure control valve 31 are arranged on the second pressure control branch, and pressure control oil return is performed through the pressure control valve 31.

[0037] The third three-way valve 28 is usually in a straight-through state. When the second safety valve 29 and the pressure control valve 31 in the second oil return branch fail, the bypass of the third three-way valve 28 is opened, and the oil is returned through the first oil return branch; when the second oil return branch is normal, the first oil return branch is closed, and the oil is returned through the second oil return branch; the upper limit of the second safety valve 29 is set to 12Bar. When the oil pressure is too high, the sealing oil returns directly to the oil tank through the second safety valve 29; during the operation of the oil station 6, the solenoid valve 30 is always in an open state. When it stops working, the solenoid valve 30 automatically closes to maintain the oil pressure in the sealing chamber to prevent the leakage of the working fluid. In order to prevent the oil pressure from being too low, the pressure control valve 31 is set to 5Bar. When the oil pressure is lower than 5Bar, the pressure control valve 31 is closed. When the oil accumulates in the pipe and the oil pressure rises to more than 5Bar, the pressure control valve 31 opens to return the oil to the oil tank.

[0038] The turbine bearing 7 is provided with an oil return channel, and an oil recovery tank 32 is provided on the oil return channel; since double-end mechanical seals are used in large radial centrifugal turbines, the intermediate seal flushing liquid is sealing oil, which has strong sealing performance; and since the sealing oil pressure is greater than the pressure on the working medium side, only a small amount of sealing oil will flow to the working medium side, and therefore an oil return channel is provided on the working medium side of the radial centrifugal turbine mechanical seal group, and a mixture of the sealing oil leaked to the working medium side and a small amount of working medium can be recovered and enter the oil recovery tank 32 with a heating device; due to the low boiling point characteristic of the working medium, the working medium is evaporated into a gaseous state after heating and returns to the centrifugal turbine outlet, while the high boiling point sealing oil returns to the oil return room of the sealing oil tank 8.

[0039] A second electric pump 17 is arranged in the oil supply room of the lubricating oil tank 9. One end of the lubricating oil supply pipeline is connected to the second electric pump 17, and the other end is connected to the lubricating oil inlet of the turbine bearing 7. A second oil cooler 34 and a second filter 35 are arranged on the lubricating oil supply pipeline. The second electric pump 17 is connected to the inlet of the second oil cooler 34 through a fourth check valve 41, and the outlet of the second oil cooler 34 is connected to the second filter 35. A second filter 35 is arranged in parallel below the second filter 35, and two parallel second filters 35 are connected to the second oil cooler 34 through a fifth three-way valve 40; the outlet of the second filter 35 is connected to the lubricating oil inlet of the turbine bearing 7 through a third check valve 38. The working principle and process of the lubricating oil supply pipeline are basically the same as those of the sealing oil supply pipeline.

[0040] A fourth three-way valve 36 is arranged between the outlet of the second oil cooler 34 and the second filter 35, and the bypass of the fourth three-way valve 36 is connected with the front end of the inlet of the second oil cooler 34 through a pipeline; a fourth pressure control branch is arranged at the front end of the inlet of the second oil cooler 34, and the fourth pressure control branch is connected to the return oil room of the lubricating oil tank 9, and a fourth safety valve 37 is arranged on the fourth pressure control branch, and the pressure return oil is controlled by the fourth safety valve 37; a fifth safety valve 39 is arranged between the third check valve 38 and the turbine bearing 7, and the fifth safety valve 39 is connected to the return oil room of the lubricating oil tank 9 through a pipeline, and the pressure return oil is controlled by the fifth safety valve 39.

[0041] One end of the lubricating oil return pipeline is connected to the lubricating oil outlet of the turbine bearing 7, and the other end is connected to the return oil room of the lubricating oil tank 9 for direct oil return. A sight glass 33 is provided on the lubricating oil return pipeline to observe the amount of lubricating oil.

[0042] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the above embodiments do not limit the utility model in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the utility model.

Claims

1. A radial centrifugal turbine oil station system for MW-class ORC power generation, comprising an evaporator (1), a turbine expander (2), a generator (3), a condenser (4), a working fluid pump (5), an oil station (6) and a turbine bearing (7), characterized in that: The oil station (6) comprises a sealing oil system and a lubricating oil system; the sealing oil system comprises a sealing oil tank (8), a sealing oil supply pipeline and a sealing oil return pipeline; the lubricating oil system comprises a lubricating oil tank (9), a lubricating oil supply pipeline and a lubricating oil return pipeline; The sealing oil tank (8) supplies oil to the working fluid pump (5) and the turbine bearing (7) through the sealing oil supply pipeline, and the sealing oil in the working fluid pump (5) and the turbine bearing (7) flows back to the sealing oil tank (8) through the sealing oil return pipeline; The lubricating oil tank (9) supplies oil to the turbine bearing (7) through the lubricating oil supply pipeline, and the lubricating oil in the turbine bearing (7) flows back to the lubricating oil tank (9) through the lubricating oil return pipeline.

2. A radial centrifugal turbine oil station system for MW-class ORC power generation according to claim 1, characterized in that: The tops of the sealed oil tank (8) and the lubricating oil tank (9) are both provided with an oil filling port (10) and an air drying filter (11), and partitions are provided inside the sealed oil tank (8) and the lubricating oil tank (9) to separate the sealed oil tank (8) and the lubricating oil tank (9) into an oil supply room and an oil return room, respectively; the oil supply room of the sealed oil tank (8) and the oil supply room of the lubricating oil tank (9) are both provided with a liquid level meter (12) and an electric heating device (13).

3. A radial centrifugal turbine oil station system for MW-class ORC power generation according to claim 2, characterized in that: A pneumatic pump (15) and a first electric pump (16) are arranged in the oil supply room of the sealing oil tank (8); one end of the sealing oil supply pipeline is connected to the sealing oil inlet of the turbine bearing (7) and the working fluid pump (5); the other end is connected to the oil supply room of the sealing oil tank (8) through the pneumatic pump (15) or the first electric pump (16); a first oil cooler (20) and a first filter (23) are arranged on the sealing oil supply pipeline; the pneumatic pump (15) and the first electric pump (16) are respectively connected to the inlet of the first oil cooler (20) through a first check valve (18); the outlet of the first oil cooler (20) is connected to the first filter (23); and the outlet of the first filter (23) is connected to the sealing oil inlet of the turbine bearing (7) and the working fluid pump (5) through a second check valve (24); One end of the sealing oil return pipeline is connected to the sealing oil outlets of the working fluid pump (5) and the turbine bearing (7), and the other end is connected to the oil return room of the sealing oil tank (8); a third three-way valve (28) is provided on the sealing oil return pipeline, and a first oil return branch and a second oil return branch are formed through the third three-way valve (28), and both the first oil return branch and the second oil return branch are connected to the oil return room of the sealing oil tank (8), and the first oil return branch directly returns oil; the second oil return branch is divided into a first pressure control branch and a second pressure control branch through a pipeline; a second safety valve (29) is provided on the first pressure control branch, and pressure-controlled oil return is performed through the second safety valve (29); a solenoid valve (30) and a pressure control valve (31) are provided on the second pressure control branch, and pressure-controlled oil return is performed through the pressure control valve (31).

4. A radial centrifugal turbine oil station system for MW-class ORC power generation according to claim 3, characterized in that: A first three-way valve (21) is provided between the outlet of the first oil cooler (20) and the first filter (23), and a bypass of the first three-way valve (21) is connected to the front end of the inlet of the first oil cooler (20) through a pipeline; a third pressure control branch is provided at the front end of the inlet of the first oil cooler (20), the third pressure control branch is connected to the oil return room of the sealing oil tank (8), a first safety valve (19) is provided on the third pressure control branch, and oil return is controlled by the first safety valve (19); a third safety valve (25) is provided between the second check valve (24) and the turbine bearing (7), and between the second check valve (24) and the working fluid pump (5), the third safety valve (25) is connected to the oil return room of the sealing oil tank (8) through a pipeline, and oil return is controlled by the third safety valve (25).

5. A radial centrifugal turbine oil station system for MW-class ORC power generation according to claim 3, characterized in that: A debugging hand valve (26) is provided between the pneumatic pump (15) and the first check valve (18), and the other end of the debugging hand valve (26) is connected to the oil return room of the sealing oil tank (8) via a hose.

6. A radial centrifugal turbine oil station system for MW-class ORC power generation according to claim 3, characterized in that: A buffer tank (27) is provided on one end of the sealing oil return pipeline close to the working fluid pump (5).

7. A radial centrifugal turbine oil station system for MW-class ORC power generation according to claim 3, characterized in that: A first filter (23) is arranged in parallel below the first filter (23), and the two parallel first filters (23) are connected to the first oil cooler (20) via a second three-way valve (22).

8. A radial centrifugal turbine oil station system for MW-class ORC power generation according to claim 3, characterized in that: An oil return channel is provided on the turbine bearing (7), and an oil recovery tank (32) is provided on the oil return channel.

9. A radial centrifugal turbine oil station system for MW-class ORC power generation according to claim 2, characterized in that: A second electric pump (17) is arranged in the oil supply room of the lubricating oil tank (9); one end of the lubricating oil supply pipeline is connected to the second electric pump (17), and the other end is connected to the lubricating oil inlet of the turbine bearing (7); a second oil cooler (34) and a second filter (35) are arranged on the lubricating oil supply pipeline; the second electric pump (17) is connected to the inlet of the second oil cooler (34) through a fourth check valve (41); the outlet of the second oil cooler (34) is connected to the second filter (35); a second filter (35) is arranged in parallel below the second filter (35); and the two parallel second filters (35) are connected to the second oil cooler (34) through a fifth three-way valve (40); the outlet of the second filter (35) is connected to the lubricating oil inlet of the turbine bearing (7) through a third check valve (38); One end of the lubricating oil return pipeline is connected to the lubricating oil outlet of the turbine bearing (7), and the other end is connected to the oil return room of the lubricating oil tank (9) for direct oil return. The lubricating oil return pipeline is provided with a sight glass (33).

10. A radial centrifugal turbine oil station system for MW-class ORC power generation according to claim 9, characterized in that: A fourth three-way valve (36) is provided between the outlet of the second oil cooler (34) and the second filter (35), and a bypass of the fourth three-way valve (36) is connected to the front end of the inlet of the second oil cooler (34) through a pipeline; a fourth pressure control branch is provided at the front end of the inlet of the second oil cooler (34), and the fourth pressure control branch is connected to the oil return room of the lubricating oil tank (9); a fourth safety valve (37) is provided on the fourth pressure control branch, and the oil return is controlled by the fourth safety valve (37); a fifth safety valve (39) is provided between the third check valve (38) and the turbine bearing (7), and the fifth safety valve (39) is connected to the oil return room of the lubricating oil tank (9) through a pipeline, and the oil return is controlled by the fifth safety valve (39).

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