Steam turbine turning gear with high-precision control function

Abstract

The invention belongs to the technical field of barring gears, and discloses a steam turbine barring gear with high-precision control, which comprises a barring seat, a barring gear is mounted at the top of the barring seat, a lubricating seat is arranged on one side of the barring gear, a liquid outlet pipe is fixedly connected to the side wall of the lubricating seat, and a circulating pump is mounted at the bottom end of the liquid outlet pipe. The input end of the circulating pump is connected with a liquid inlet pipe, the liquid inlet pipe is embedded in a recycling box, and the recycling box is arranged below the turning gear; and a filter screen and a partition plate are fixedly mounted in the recycling box. In the working process, the circulating pump is started to suck lubricating liquid in the second cavity through the liquid inlet pipe, the lubricating liquid is discharged from the lubricating base through the liquid outlet pipe to lubricate the turning gear, and the lubricating liquid dripping from the surface of the turning gear is received through the recycling box; and when the lubricating liquid enters the recycling box, impurities such as metal chippings and dust in the lubricating liquid are filtered through the filter screen and then recycled into the first cavity, so that the manual maintenance cost is reduced, the shutdown replacement frequency is reduced, and then the unit starting efficiency is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of turning gear devices, and in particular relates to a steam turbine turning gear device with high-precision control. Background Art

[0002] The turbine turning device is the core equipment to ensure the safe operation of the unit. Its function is to eliminate thermal bending by rotating the rotor at a low speed, prevent friction between the moving and static parts, and reduce thermal stress during startup.

[0003] After searching, patent: CN119755307A automatic meshing electric turning device includes a turning seat, a reducer body, a reducer motor, a screw handwheel, a first gear and a second gear. The reducer body is arranged on the top of the turning seat, the reducer motor is arranged on the top of the reducer body, the screw handwheel is arranged on one side of the top of the turning seat, the first gear is arranged on one side of the reducer body, and the second gear is arranged on the other side of the reducer body. Through the cooperation of the baffle plate, the collection box, the pump body, the fixed pipe, the L-shaped pipe, the spray plate and the hose, the lubricating liquid is guided to the interior of the collection box through the guide pipe for collection. After the pump body is started, the lubricating liquid continues to be guided to the interior of the spray plate through the fixed pipe, thereby reducing direct contact between the first gear and the second gear and reducing wear. The lubricating liquid can also isolate air and moisture to prevent oxidation and corrosion on the gear surface, thereby extending the service life of the electric turning device.

[0004] During operation, current turning mechanisms spray lubricant onto the turning gears and recycle it in a catch box. While this reduces wear on the turning gears and extends their service life, the catch box's capacity is limited. When the lubricant reaches its upper limit, the system must be shut down and replaced. Furthermore, the recycled lubricant can be contaminated with impurities such as metal debris and dust, requiring manual filtration, which results in high maintenance costs. Summary of the Invention

[0005] The object of the present invention is to provide a steam turbine turning device with high-precision control to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a steam turbine turning device with high-precision control, comprising a turning seat, a turning gear mounted on the top of the turning seat, a lubrication seat provided on one side of the turning gear, a liquid outlet pipe fixedly connected to the side wall of the lubrication seat, a circulating pump mounted on the bottom end of the liquid outlet pipe, a liquid inlet pipe connected to the input end of the circulating pump, the liquid inlet pipe embedded in a recovery box, and the recovery box provided below the turning gear;

[0007] A filter screen and a partition are fixedly installed inside the recovery box. The partition is arranged below the filter screen. A cleaning component is arranged on the top of the filter screen. A drainage component is arranged inside the recovery box.

[0008] As a further technical solution of the present invention, the cleaning assembly includes an upper scraper arranged at the top of the filter screen, the upper scraper is slidably installed in the interior of the recovery box, a first reciprocating screw and a guide shaft are respectively embedded in the interiors of both ends of the upper scraper, the guide shaft is slidably connected to the upper scraper, the first reciprocating screw is threadedly connected to the upper scraper, and a motor is installed at one end of the first reciprocating screw;

[0009] A liquid level sensor is provided above the filter screen and is fixedly mounted on the top of the recovery tank.

[0010] As a further technical solution of the present invention, through holes are opened inside the upper scraper, and the through holes are evenly distributed.

[0011] As a further technical solution of the present invention, bristles are fixedly connected to the bottom of the upper scraper, and the bristles are evenly arranged.

[0012] As a further technical solution of the present invention, the drainage assembly includes liquid guide tubes evenly arranged inside the recovery box, the inner wall of each liquid guide tube is rotatably connected to a ball valve, and each of the ball valves is fixedly connected by a connecting shaft;

[0013] A fourth bevel gear is fixedly mounted on one end of the connecting shaft, a top end of the fourth bevel gear is meshedly connected to a third bevel gear, a rotating shaft is fixedly mounted on the top end of the third bevel gear, a second bevel gear is fixedly mounted on the top end of the rotating shaft, one side of the second bevel gear is meshedly connected to the first bevel gear, and the first bevel gear is fixedly mounted on one end of the guide shaft;

[0014] The outer wall of the guide shaft is sleeved with a movable shaft, a first spring is provided on one side of the movable shaft, the inner wall of the movable shaft is fixedly connected with a slider, the slider is slidably installed on the inner wall of the spiral groove, and the spiral groove is opened on the outer wall of the guide shaft.

[0015] As a further technical solution of the present invention, the movable shaft and the guide shaft are slidingly connected.

[0016] As a further technical solution of the present invention, the top opening of the liquid guiding tube is arranged above the partition.

[0017] As a further technical solution of the present invention, a lower scraper is provided at the bottom end of the filter screen, and the inner wall of one end of the lower scraper is threadedly connected to a second reciprocating screw rod, and the second reciprocating screw rod is arranged below the first reciprocating screw rod, and the second reciprocating screw rod and the first reciprocating screw rod are connected through a pulley group.

[0018] As a further technical solution of the present invention, the lower scraper and the upper scraper are symmetrically distributed at both ends of the filter screen.

[0019] As a further technical solution of the present invention, bumps are evenly installed on the top of the lower scraper, and a second spring is provided at the bottom end of each bump.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention is provided with a recovery box for filtering and recovering the lubricating liquid. When working, the circulation pump is started to absorb the lubricating liquid in the second chamber through the liquid inlet pipe and discharge it from the lubrication seat through the liquid outlet pipe to lubricate the turning gear, and the lubricating liquid dripping from the surface of the turning gear is received by the recovery box. When the lubricating liquid enters the recovery box, it first contacts the filter screen, and the metal debris, dust and other impurities inside are filtered through the filter screen and then recovered into the first chamber, so as to reduce the cost of manual maintenance and the frequency of shutdown and replacement, thereby ensuring the startup efficiency of the unit.

[0022] 2. The present invention is equipped with a cleaning component. When the surface of the filter needs to be cleaned, the motor is started to drive the first reciprocating screw to rotate. The rotation of the first reciprocating screw drives the upper scraper to move back and forth on the top of the filter, scraping off metal debris, oxidized particles and other impurities attached to the surface of the filter to prevent them from clogging the pores and affecting the filtration efficiency.

[0023] 3. The present invention is provided with a liquid discharge assembly. When the upper scraper moves, the upper scraper is separated from the movable shaft, and the elastic potential energy is released by the first spring to make the movable shaft slide outward. The movement of the movable shaft drives the slider to slide on the inner wall of the spiral groove, and the guide shaft is rotated through the spiral groove. The rotation of the guide shaft drives the rotation of the first bevel gear, and the rotation of the first bevel gear drives the rotation of the second bevel gear. The rotation of the second bevel gear drives the rotation of the rotating shaft. The rotation of the rotating shaft drives the rotation of the third bevel gear. The rotation of the third bevel gear drives the rotation of the fourth bevel gear. The rotation of the fourth bevel gear drives the rotation of the connecting shaft. The rotation of the connecting shaft drives the ball valve to rotate to open the liquid guide tube, so that the lubricating liquid recovered in the first chamber above the partition flows into the second chamber below the partition through the liquid guide tube, thereby reusing the lubricating liquid after filtration and standing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0026] Figure 3 This is a schematic cross-sectional view of the recycling box structure of the present invention;

[0027] Figure 4 For the present invention Figure 3 A schematic diagram of the structure at center A;

[0028] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at point B in the middle;

[0029] Figure 6 For the present invention Figure 3 A magnified schematic diagram of the structure at point C in the middle;

[0030] Figure 7 This is a schematic cross-sectional view of the structure of the lower scraper of the present invention;

[0031] Figure 8 It is a schematic cross-sectional view of the structure at the moving axis of the present invention.

[0032] In the figure: 1. turning seat; 2. turning gear; 3. recovery box; 4. circulating pump; 5. liquid outlet pipe; 6. lubrication seat; 7. liquid inlet pipe; 8. filter; 9. partition; 10. motor; 11. first reciprocating screw; 12. upper scraper; 13. moving shaft; 14. spiral groove; 15. slider; 16. first spring; 17. first bevel gear; 18. second bevel gear; 19. rotating shaft; 20. third bevel gear; 21. fourth bevel gear; 22. connecting shaft; 23. ball valve; 24. liquid guide tube; 25. through hole; 26. lower scraper; 27. second reciprocating screw; 28. pulley assembly; 29. bump; 30. second spring; 31. liquid level sensor; 32. guide shaft; 33. brush. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] like Figures 1 to 8As shown, in an embodiment of the present invention, a steam turbine turning device with high-precision control includes a turning seat 1, a turning gear 2 is installed on the top of the turning seat 1, a lubrication seat 6 is provided on one side of the turning gear 2, a liquid outlet pipe 5 is fixedly connected to the side wall of the lubrication seat 6, a circulating pump 4 is installed at the bottom end of the liquid outlet pipe 5, an input end of the circulating pump 4 is connected to a liquid inlet pipe 7, and the liquid inlet pipe 7 is embedded in a recovery box 3, and the recovery box 3 is provided below the turning gear 2;

[0035] A filter screen 8 and a partition plate 9 are fixedly installed inside the recovery box 3. The partition plate 9 is arranged below the filter screen 8. A cleaning component is arranged on the top of the filter screen 8. A drainage component is arranged inside the recovery box 3.

[0036] Existing: CN119755307A discloses an automatic meshing electric turning device. This patent discloses the turning seat 1 and turning gear 2 proposed in this application document. This technical means will not be described in detail here;

[0037] The interior of the recovery box 3 is divided into a first chamber and a second chamber by a partition 9, and the second chamber is preset with lubricating liquid;

[0038] The recovery tank 3 is used to filter and recover the lubricating liquid. When the lubricating liquid is working, the circulation pump 4 is started to absorb the lubricating liquid in the second chamber through the liquid inlet pipe 7 and is connected to the lubrication seat 6 through the liquid outlet pipe 5 to lubricate the turning gear 2. The lubricating liquid dripping from the surface of the turning gear 2 is received by the recovery tank 3.

[0039] When the lubricating fluid enters the recovery box 3, it first contacts the filter 8, and the metal debris, dust and other impurities inside are filtered by the filter 8 and then recovered into the first chamber, so as to reduce the cost of manual maintenance and the frequency of shutdown and replacement, thereby ensuring the startup efficiency of the unit.

[0040] like Figures 1 to 8 As shown, the cleaning assembly includes an upper scraper 12 arranged at the top of the filter 8, the upper scraper 12 is slidably installed in the interior of the recovery box 3, and the first reciprocating screw rod 11 and the guide shaft 32 are respectively embedded in the interiors of the two ends of the upper scraper 12. The guide shaft 32 is slidably connected to the upper scraper 12, and the first reciprocating screw rod 11 is threadedly connected to the upper scraper 12. One end of the first reciprocating screw rod 11 is installed with a motor 10;

[0041] A liquid level sensor 31 is provided above the filter screen 8 , and the liquid level sensor 31 is fixedly mounted on the top of the recovery box 3 .

[0042] When the liquid level sensor 31 detects that the lubricating liquid inside the recovery tank 3 overflows the filter 8, the motor 10 is started through the PLC control;

[0043] When the surface of the filter 8 needs to be cleaned, the motor 10 is started to drive the first reciprocating screw 11 to rotate. The rotation of the first reciprocating screw 11 drives the upper scraper 12 to move back and forth at the top of the filter 8, scraping off metal debris, oxidized particles and other impurities attached to the surface of the filter 8 to prevent them from clogging the pores and affecting the filtration efficiency.

[0044] like Figure 3 、 Figure 4 and Figure 7 As shown, through holes 25 are opened inside the upper scraper 12, and the through holes 25 are evenly distributed.

[0045] The through holes 25 allow the lubricating fluid to continue to flow, avoiding stress concentration.

[0046] like Figure 7 As shown, the bottom of the upper scraper 12 is fixedly connected with bristles 33, and the bristles 33 are evenly arranged.

[0047] The flexibility of the bristles 33 (e.g., nylon or polypropylene) allows the brush to penetrate deep into the pores of the filter 8, removing tiny impurities (e.g., oxidized particles, fibrous contaminants) that are difficult for the scraper 12 to reach, and deeply cleans the surface of the filter 8;

[0048] The contact between the bristles 33 and the filter screen 8 is flexible friction, which avoids the filter screen 8 fiber breakage or pore deformation caused by direct scraping by the traditional hard upper scraper 12, and helps to increase the service life of the filter screen 8.

[0049] like Figure 4 、 Figure 5 and Figure 6 As shown, the drainage assembly includes liquid guide tubes 24 evenly arranged inside the recovery box 3. The inner wall of each liquid guide tube 24 is rotatably connected to a ball valve 23, and each ball valve 23 is fixedly connected by a connecting shaft 22.

[0050] A fourth bevel gear 21 is fixedly mounted on one end of the connecting shaft 22, and the top end of the fourth bevel gear 21 is meshedly connected to the third bevel gear 20. A rotating shaft 19 is fixedly mounted on the top end of the third bevel gear 20, and a second bevel gear 18 is fixedly mounted on the top end of the rotating shaft 19. One side of the second bevel gear 18 is meshedly connected to the first bevel gear 17, and the first bevel gear 17 is fixedly mounted on one end of the guide shaft 32.

[0051] The outer wall of the guide shaft 32 is sleeved with the movable shaft 13, and a first spring 16 is provided on one side of the movable shaft 13. The inner wall of the movable shaft 13 is fixedly connected with a slider 15, and the slider 15 is slidably installed on the inner wall of the spiral groove 14. The spiral groove 14 is opened on the outer wall of the guide shaft 32.

[0052] When the upper scraper 12 moves, the upper scraper 12 separates from the moving shaft 13, and the elastic potential energy released by the first spring 16 causes the moving shaft 13 to slide outward. The movement of the moving shaft 13 drives the slider 15 to slide on the inner wall of the spiral groove 14, and the spiral groove 14 causes the guide shaft 32 to rotate. The rotation of the guide shaft 32 drives the rotation of the first bevel gear 17, and the rotation of the first bevel gear 17 drives the rotation of the second bevel gear 18. The rotation of the second bevel gear 18 drives the rotation of the rotating shaft 19. The rotation of the rotating shaft 19 drives the rotation of the third bevel gear 20. The rotation of the third bevel gear 20 drives the rotation of the fourth bevel gear 21. The rotation of the fourth bevel gear 21 drives the rotation of the connecting shaft 22. The rotation of the connecting shaft 22 drives the ball valve 23 to rotate to open the liquid guide tube 24, so that the lubricating fluid recovered in the first chamber above the partition 9 flows into the second chamber below the partition 9 through the liquid guide tube 24, thereby reusing the filtered and stationary lubricating fluid.

[0053] like Figure 8 As shown, the movable shaft 13 and the guide shaft 32 are slidably connected.

[0054] like Figure 5 As shown, the top opening of the liquid guiding tube 24 is arranged above the partition 9.

[0055] When the coolant is recovered, it is temporarily stored in the first chamber divided by the partition 9, so that the lubricating liquid is allowed to stand in the first chamber, and impurities with a density greater than that of the lubricating liquid, such as metal particles, settle to the bottom during the standing period;

[0056] During drainage, the height difference between the opening of the liquid guide tube 24 and the surface of the partition plate 9 prevents the impurities settled at the bottom of the first chamber from being discharged, thereby improving the recovery effect of the lubricating liquid.

[0057] like Figure 4 and Figure 6 As shown, a lower scraper 26 is provided at the bottom end of the filter 8, and the inner wall of one end of the lower scraper 26 is threadedly connected to a second reciprocating screw 27. The second reciprocating screw 27 is arranged below the first reciprocating screw 11, and the second reciprocating screw 27 is connected to the first reciprocating screw 11 through a pulley set 28.

[0058] When the first reciprocating screw 11 rotates, the second reciprocating screw 27 is driven to rotate through the pulley set 28. The rotation of the second reciprocating screw 27 drives the lower scraper 26 to move back and forth once at the bottom of the filter screen 8, assisting in the separation of impurities and lubricating fluid, thereby improving the recovery efficiency.

[0059] like Figure 3 、 Figure 4 and Figure 6 As shown, the lower scraper 26 and the upper scraper 12 are symmetrically distributed at both ends of the filter screen 8.

[0060] like Figure 4 and Figure 6 As shown, bumps 29 are evenly installed on the top of the lower scraper 26, and a second spring 30 is provided at the bottom end of each bump 29.

[0061] The elastic potential energy of the second spring 30 makes the protrusion 29 always tend to move upward. When the lower scraper 26 moves, the protrusion 29 elastically contacts the bottom end of the filter 8, generating micro-vibration, which promotes the adhesion of impurities (such as sludge and colloid) to separate from the surface.

[0062] Working principle and usage process:

[0063] When working, the circulation pump 4 is started to absorb the lubricating liquid in the second chamber through the liquid inlet pipe 7 and discharge it from the lubrication seat 6 through the liquid outlet pipe 5 to lubricate the turning gear 2, and the lubricating liquid dripping from the surface of the turning gear 2 is received by the recovery box 3;

[0064] When the lubricating fluid enters the recovery box 3, it first contacts the filter 8, filters the metal debris, dust and other impurities inside, and then is recovered and placed in the first chamber;

[0065] When the liquid level sensor 31 detects that the lubricating liquid in the recovery tank 3 overflows the filter 8, the PLC controls the motor 10 to start driving the first reciprocating screw 11 to rotate. The rotation of the first reciprocating screw 11 drives the upper scraper 12 to move back and forth once on the top of the filter 8. The movement of the upper scraper 12 drives the bristles 33 to move and deeply clean the surface of the filter 8.

[0066] When the upper scraper 12 moves, the upper scraper 12 separates from the moving shaft 13, and the elastic potential energy released by the first spring 16 causes the moving shaft 13 to slide outward. The movement of the moving shaft 13 drives the slider 15 to slide on the inner wall of the spiral groove 14, and the spiral groove 14 causes the guide shaft 32 to rotate. The rotation of the guide shaft 32 drives the rotation of the first bevel gear 17, and the rotation of the first bevel gear 17 drives the rotation of the second bevel gear 18. The rotation of the second bevel gear 18 drives the rotation of the rotating shaft 19. The rotation of the rotating shaft 19 drives the rotation of the third bevel gear 20. The rotation of the third bevel gear 20 drives the rotation of the fourth bevel gear 21. The rotation of the fourth bevel gear 21 drives the rotation of the connecting shaft 22. The rotation of the connecting shaft 22 drives the ball valve 23 to rotate to open the liquid guide tube 24, so that the lubricating fluid recovered in the first chamber above the partition 9 flows into the second chamber below the partition 9 through the liquid guide tube 24, so that the lubricating fluid after filtration and standing is reused;

[0067] When the upper scraper 12 moves to reset, it contacts the movable shaft 13 and presses it into the recovery box 3. Similarly, the ball valve 23 rotates to close the liquid guide tube 24.

[0068] When the first reciprocating screw 11 rotates, the second reciprocating screw 27 is driven to rotate through the pulley set 28. The rotation of the second reciprocating screw 27 drives the lower scraper 26 to move back and forth once at the bottom of the filter 8, assisting in the separation of impurities and lubricating fluid. At the same time, the elastic potential energy of the second spring 30 makes the protrusion 29 always have a tendency to move upward. When the lower scraper 26 is moving, the protrusion 29 elastically contacts the bottom end of the filter 8, generating micro-vibration, which prompts the adhesive impurities to leave the surface.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A steam turbine turning device with high-precision control, comprising a turning seat (1), characterized in that: A turning gear (2) is installed on the top of the turning seat (1), a lubrication seat (6) is provided on one side of the turning gear (2), a liquid outlet pipe (5) is fixedly connected to the side wall of the lubrication seat (6), a circulation pump (4) is installed at the bottom end of the liquid outlet pipe (5), an input end of the circulation pump (4) is connected to a liquid inlet pipe (7), and the liquid inlet pipe (7) is embedded in a recovery box (3), and the recovery box (3) is provided below the turning gear (2); A filter screen (8) and a partition (9) are fixedly installed inside the recovery box (3); the partition (9) is arranged below the filter screen (8); a cleaning component is arranged at the top of the filter screen (8); and a drainage component is arranged inside the recovery box (3).

2. The high-precision control steam turbine turning device according to claim 1, characterized in that: The cleaning assembly comprises an upper scraper (12) arranged at the top of the filter (8), the upper scraper (12) is slidably mounted inside the recovery box (3), a first reciprocating screw (11) and a guide shaft (32) are respectively embedded in the interiors of both ends of the upper scraper (12), the guide shaft (32) and the upper scraper (12) are slidably connected, the first reciprocating screw (11) and the upper scraper (12) are threadedly connected, and a motor (10) is mounted on one end of the first reciprocating screw (11); A liquid level sensor (31) is provided above the filter screen (8), and the liquid level sensor (31) is fixedly mounted on the top of the recovery box (3).

3. The high-precision control steam turbine turning device according to claim 2, characterized in that: Through holes (25) are provided inside the upper scraper (12), and the through holes (25) are evenly distributed.

4. The high-precision control steam turbine turning device according to claim 2, characterized in that: Brush bristles (33) are fixedly connected to the bottom of the upper scraper (12), and the brush bristles (33) are evenly arranged.

5. The high-precision control steam turbine turning device according to claim 1, characterized in that: The drainage assembly includes liquid guide tubes (24) uniformly arranged inside the recovery box (3), the inner wall of each liquid guide tube (24) is rotatably connected to a ball valve (23), and each ball valve (23) is fixedly connected via a connecting shaft (22); A fourth bevel gear (21) is fixedly mounted on one end of the connecting shaft (22), a top end of the fourth bevel gear (21) is meshedly connected to a third bevel gear (20), a rotating shaft (19) is fixedly mounted on the top end of the third bevel gear (20), a second bevel gear (18) is fixedly mounted on the top end of the rotating shaft (19), one side of the second bevel gear (18) is meshedly connected to a first bevel gear (17), and the first bevel gear (17) is fixedly mounted on one end of a guide shaft (32); The outer wall of the guide shaft (32) is sleeved with a movable shaft (13), a first spring (16) is provided on one side of the movable shaft (13), the inner wall of the movable shaft (13) is fixedly connected with a slider (15), and the slider (15) is slidably mounted on the inner wall of a spiral groove (14), and the spiral groove (14) is opened on the outer wall of the guide shaft (32).

6. The high-precision control steam turbine turning device according to claim 5, characterized in that: The movable shaft (13) and the guide shaft (32) are slidably connected.

7. The high-precision control steam turbine turning device according to claim 5, characterized in that: The top opening of the liquid guiding tube (24) is arranged above the partition (9).

8. The high-precision control steam turbine turning device according to claim 1, characterized in that: A lower scraper (26) is provided at the bottom end of the filter screen (8), and a second reciprocating screw (27) is threadedly connected to the inner wall of one end of the lower scraper (26). The second reciprocating screw (27) is provided below the first reciprocating screw (11), and the second reciprocating screw (27) and the first reciprocating screw (11) are connected to each other through a pulley group (28).

9. The high-precision control steam turbine turning device according to claim 8, characterized in that: The lower scraper (26) and the upper scraper (12) are symmetrically distributed at both ends of the filter screen (8).

10. The high-precision control steam turbine turning device according to claim 9, characterized in that: The top of the lower scraper (26) is evenly provided with protrusions (29), and the bottom end of each protrusion (29) is provided with a second spring (30).

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