Oil leakage prevention device of variable pitch motor

Abstract

The utility model discloses an oil leakage prevention device for a variable-pitch motor, belongs to the technical field of variable-pitch motors, and aims to solve the problems that end covers which are in threaded connection in the middle and are used for connecting two sides are unstable in installation and are possibly influenced by rotation when being disassembled, the oil leakage prevention device comprises a motor protective cover, and a gear box is arranged on one side of the motor protective cover; a connecting base is arranged between the motor protective cover and the gearbox, a variable-pitch motor body is fixed to an inner cavity of the motor protective cover, the output end of the variable-pitch motor body penetrates through the motor protective cover and extends to the inner cavity of the gearbox, and two rod grooves are formed in the surfaces of the upper end and the lower end of the connecting base. Four openings are formed in the surfaces of the sides, close to each other, of the motor protective cover and the gearbox; according to the utility model, the motor protective cover and the gear box can be fixedly connected, and the end cover in threaded connection is adopted for connection, so that the situation of unstable installation is avoided, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of variable pitch motors, and in particular relates to an oil leakage prevention device for variable pitch motors. Background Art

[0002] At present, in the existing wind turbine pitch control system, due to the design defects of the early reduction gear, lubricating oil has been continuously leaking during the rotation of the wind turbine hub. The pitch motor does not take into account the oil leakage in the wind farm use environment. In order to prevent the lubricating oil from leaking into the internal cavity of the motor, destroying the insulation of the motor and reducing the service life of the motor, it is necessary to use a corresponding pitch motor anti-leakage device.

[0003] CN215934598U in the prior art is a pitch motor oil leakage prevention device, which prevents the lubricating oil leaking from the gear box from flowing into the pitch motor through the end cover. At the same time, the end cover can also block foreign water vapor and dust from entering the pitch motor, which greatly improves the service life of the pitch motor and reduces maintenance costs. However, in actual use, there are certain shortcomings. Since the end covers on both sides are connected in the middle by threads, the installation is unstable and needs to be rotated during disassembly, which may have an impact. In addition, the pitch motor part of the equipment cannot dissipate heat, which will affect the service life and working efficiency of the motor and is not conducive to use.

[0004] Therefore, a variable pitch motor oil leakage prevention device is needed to solve the problem in the prior art that the end covers on both sides are connected by a threaded connection in the middle, the installation is unstable and the need to rotate during disassembly may have an impact. Utility Model Content

[0005] The utility model aims to provide a pitch motor oil leakage prevention device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pitch motor oil leakage prevention device, comprising a motor protective cover, a gear box is arranged on one side of the motor protective cover, a connecting seat is arranged at the middle position between the motor protective cover and the gear box, a pitch motor body is fixed to the inner cavity of the motor protective cover, the output end of the pitch motor body passes through the motor protective cover and extends to the inner cavity position of the gear box, two rod grooves are arranged on the surfaces at the upper and lower ends of the connecting seat, four openings are arranged on the surface of the side close to the motor protective cover and the gear box, first threaded rods are rotatably connected to the two sides of the inner wall of the rod groove, and a U-shaped gear is fixed at the middle position inside the rod groove. A support seat, the first threaded rod and the support seat are rotatably connected, the outer circumferential surface of the first threaded rod is threadedly connected with a threaded sleeve, the top of the threaded sleeve is fixed with an insert block, one side of the insert block extends to the inside of the adjacent position opening, the surface of the top of the insert block is provided with a limiting groove, the top of the limiting groove is inserted with a limiting block, both ends of the top surface of the limiting block are fixed with springs, the top of the spring is fixed to the inner wall of the adjacent position opening, the motor protective cover and the gear box surface are threadedly connected with a second threaded rod at one end of the opening, one end of the second threaded rod extends to the inside of the adjacent position opening and is rotatably connected to the surface of the adjacent position limiting block.

[0007] It should be noted in the scheme that one end of the support seat is rotatably connected to a movable shaft, one end of the movable shaft extends to the inner cavity position of the rod groove at the adjacent position, and a first bevel gear is fixedly sleeved on the outer circumference of the first threaded rod near the position of the movable shaft at the adjacent position, and a second bevel gear is fixedly sleeved on the outer circumference of the movable shaft, and the movable shaft is meshingly connected to the two adjacent first bevel gears.

[0008] It is further worth explaining that an oil seal ring is provided on the outer circumferential surface of the variable pitch motor body at the positions of the inner cavity of the motor protective cover and the inner cavity of the gear box, a rotating sleeve is fixed on the outer circumferential surface of the oil seal ring, and limiting grooves are provided on both sides of the rotating sleeve in the inner cavity of the motor protective cover and the inner cavity of the gear box, a limiting ring is movably inserted inside the limiting groove, and one side of the limiting ring passes through the limiting groove at an adjacent position and is fixed to the surface of the rotating sleeve at an adjacent position.

[0009] It should be further explained that a plurality of ventilation grooves are connected to the top of the inner cavity of the motor protective cover, a valve plate is arranged at the top position of the inner cavity of the ventilation groove, a connecting rod is fixed to one side of the valve plate, one side of one group of the connecting rods is fixed to the surface of another valve plate, and one side of the remaining connecting rod extends out of the outside of the motor protective cover, and a filter is fixed to the bottom of the inner cavity of the ventilation groove.

[0010] As a preferred embodiment, one of the connecting rods extending out of the surface of the outer part of the motor protective cover is fixed with a sleeve plate, and the surface of the motor protective cover away from the gear box is provided with two threaded holes, and the surface of the sleeve plate is threadedly connected with a bolt, and one side of the bolt extends to the inside of the threaded hole at an adjacent position.

[0011] As a preferred implementation, both ends of the valve plate surface are arranged in an arc shape, and the surface of one side of the insert block is arranged in an arc shape.

[0012] Compared with the prior art, the utility model provides a pitch motor oil leakage prevention device, which has at least the following beneficial effects:

[0013] (1) When the motor shield and the gear box play a protective role, the connecting seat is placed in the middle position of the motor shield and the gear box, and the first threaded rod is rotated so that the limiting groove can extend to the inside of the adjacent opening and the limiting block can extend to the inside of the adjacent limiting groove, so that the motor shield and the gear box can be fixedly connected. Since the end cover is connected by a threaded connection, unstable installation will not occur, thereby improving the practicality of the device.

[0014] (2) The ventilation grooves can be used to dissipate heat in the inner cavity of the motor protective cover, and the filter net can prevent external dust from entering the inner cavity of the motor protective cover. The rotatable valve plate can seal or open the ventilation grooves at adjacent positions, so that the ventilation grooves can be used to dissipate heat when in use and can be closed when not in use to isolate them from the external environment, thereby further improving the ease of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model in the front view direction;

[0016] Figure 2 For the utility model Figure 1 A schematic diagram of the structure enlargement at the center A;

[0017] Figure 3 For the utility model Figure 1 A schematic diagram of the structure enlarged at B in the middle;

[0018] Figure 4 It is a three-dimensional cross-sectional schematic diagram of a local structure of a connecting seat of the utility model;

[0019] Figure 5 It is a three-dimensional structural cross-sectional schematic diagram of the partial structure of the motor protection cover and the gear box in the utility model;

[0020] Figure 6 For the utility model Figure 5A schematic diagram of the structure enlarged at C in the middle;

[0021] Figure 7 For the utility model Figure 5 Enlarged schematic diagram of the structure at D in the middle.

[0022] In the figure: 1. motor protection cover; 2. gear box; 3. connecting seat; 4. pitch motor body; 5. oil seal ring; 6. rotating sleeve; 7. limit groove; 8. limit ring; 9. rod groove; 10. first threaded rod; 11. support seat; 12. first bevel gear; 13. movable shaft; 14. second bevel gear; 15. threaded sleeve; 16. plug-in block; 17. limit groove; 18. limit block; 19. opening; 20. spring; 21. second threaded rod; 22. ventilation groove; 23. valve plate; 24. connecting rod; 25. filter screen; 26. sleeve plate; 27. threaded hole; 28. bolt. DETAILED DESCRIPTION

[0023] See also Figure 1-7The utility model provides a variable pitch motor oil leakage prevention device, comprising a motor protective cover 1, a gear box 2 is arranged on one side of the motor protective cover 1, a connecting seat 3 is arranged at the middle position between the motor protective cover 1 and the gear box 2, a variable pitch motor body 4 is fixed to the inner cavity of the motor protective cover 1, the output end of the variable pitch motor body 4 passes through the motor protective cover 1 and extends to the inner cavity position of the gear box 2, two rod grooves 9 are arranged on the surfaces of the upper and lower ends of the connecting seat 3, four openings 19 are arranged on the surface of the side where the motor protective cover 1 and the gear box 2 are close to each other, first threaded rods 10 are rotatably connected to both sides of the inner wall of the rod groove 9, a U-shaped support seat 11 is fixed at the middle position inside the rod groove 9, the first threaded rod 10 and the support seat 11 are rotatably connected, a threaded sleeve 15 is threadedly connected to the outer circumference of the first threaded rod 10, an insert block 16 is fixed to the top of the threaded sleeve 15, one side of the insert block 16 extends to the inside of the adjacent opening 19, and the surface of the top of the insert block 16 is provided with a threaded sleeve 15, a threaded sleeve 15 is fixed to the top of the insert block 16, one side of the insert block 16 extends to the inside of the adjacent opening 19, and the top of the insert block 16 is provided with a threaded sleeve 15. A limiting groove 17 is provided, and a limiting block 18 is inserted at the top of the limiting groove 17. Springs 20 are fixed at both ends of the top surface of the limiting block 18. The top of the spring 20 is fixed to the inner wall of the adjacent position opening 19. The surface of the motor protective cover 1 and the gear box 2 is threadedly connected with a second threaded rod 21 at one end of the opening 19. One end of the second threaded rod 21 extends to the inside of the adjacent position opening 19 and is rotatably connected to the surface of the adjacent position limiting block 18. When the motor protective cover 1 and the gear box 2 play a protective role, by placing the connecting seat 3 at the middle position of the motor protective cover 1 and the gear box 2, by rotating the first threaded rod 10, the limiting groove 17 can be extended to the inside of the adjacent position opening 19, and the limiting block 18 can be extended to the inside of the adjacent position limiting groove 17, so that the motor protective cover 1 and the gear box 2 can be fixedly connected. Since the end cover connected by thread is used for connection, unstable installation will not occur.

[0024] Further Figure 1 , Figure 2 and Figure 4 As shown, it is worth explaining in detail that one end of the support seat 11 is rotatably connected with a movable shaft 13, one end of the movable shaft 13 extends to the inner cavity position of the adjacent position rod groove 9, and a first bevel gear 12 is fixedly sleeved on the outer circumference of the first threaded rod 10 near the adjacent position movable shaft 13, and a second bevel gear 14 is fixedly sleeved on the outer circumference of the movable shaft 13. The movable shaft 13 and the two adjacent first bevel gears 12 are meshingly connected. The adjacent second bevel gear 14 can be rotated by rotating the movable shaft 13, so that the two adjacent first threaded rods 10 can rotate synchronously under the meshing action between the second bevel gear 14 and the two adjacent first bevel gears 12.

[0025] Further Figure 6As shown, it is worth explaining in detail that an oil seal ring 5 is sleeved on the outer circumferential surface of the variable pitch motor body 4 at the position of the inner cavity of the motor protective cover 1 and the inner cavity of the gear box 2, and a rotating sleeve 6 is fixed to the outer circumferential surface of the oil seal ring 5, and a limiting groove 7 is provided on both sides of the rotating sleeve 6 in the inner cavity of the motor protective cover 1 and the inner cavity of the gear box 2. A limiting ring 8 is movably inserted inside the limiting groove 7, and one side of the limiting ring 8 passes through the limiting groove 7 at an adjacent position and is fixed to the surface of the rotating sleeve 6 at an adjacent position. The limiting ring 8 can play a sealing role, and when the variable pitch motor body 4 rotates, it drives the oil seal ring 5 and the rotating sleeve 6 to rotate, so that the movement trajectory of the oil seal ring 5 and the rotating sleeve 6 can be limited under the interference and limiting action of the limiting groove 7 and the limiting ring 8.

[0026] Further as Figure 3 , Figure 5 and Figure 6 As shown, it is worth specifically explaining that the top of the inner cavity of the motor protective cover 1 is connected with a plurality of ventilation grooves 22, a valve plate 23 is arranged at the top position of the inner cavity of the ventilation groove 22, a connecting rod 24 is fixed to one side of the valve plate 23, one side of one group of connecting rods 24 is fixed to the surface of another valve plate 23, and one side of the remaining connecting rod 24 extends out of the outside of the motor protective cover 1, one of the connecting rods 24 extends out of the surface of the outer part of the motor protective cover 1 and is fixed with a sleeve 26, a filter screen 25 is fixed to the bottom of the inner cavity of the ventilation groove 22, and two threads are provided on the surface of the motor protective cover 1 away from the gear box 2 Hole 27, the surface of the sleeve plate 26 is threadedly connected with a bolt 28, one side of the bolt 28 extends to the inside of the adjacent threaded hole 27, and the valve plate 23 can be rotated by rotating the connecting rod 24 so that the valve plate 23 can seal or open the ventilation groove 22, and the filter screen 25 can play a filtering role to prevent the infiltration of external dust. The rotation of the connecting rod 24 can drive the sleeve plate 26 to rotate, so that the bolt 28 is embedded in the two threaded holes 27 by rotating, so that the multiple connecting rods 24 can be limited to the state of sealing the ventilation groove 22 and the state of opening the ventilation groove 22.

[0027] This solution has the following working process: in actual use, when the user needs to connect the motor shield 1 and the gear box 2, first place the connecting seat 3 in the middle position between the motor shield 1 and the gear box 2, then pass the output end of the motor shield 1 through the connecting seat 3 and extend to the inside of the gear box 2 so that it is plugged into the rotating shaft placed in the inner cavity of the gear box 2, and then rotate the movable shaft 13 to allow the second bevel gear 14 at the adjacent position to rotate, so that the first threaded rods 10 at the two adjacent positions can rotate synchronously under the meshing action between the second bevel gear 14 and the two adjacent first bevel gears 12. Since the inner cavity surface of the rod groove 9 can play a role of resisting and limiting the threaded sleeve 15, the threaded sleeve 15 can move in the horizontal direction under the cooperation between the internal thread structure of its inner wall and the corresponding external thread structure on the outer circumference of the first threaded rod 10, so that the plug block 16 can be driven to embed into the inside of the adjacent position opening 19. In this process, the surface of the limiting groove 17 will resist the adjacent position limiting block 18 makes it move in the vertical direction, so that the limiting block 18 abuts against the adjacent position spring 20 to deform it, so that when the limiting groove 17 moves to a position close to the limiting block 18, the limiting block 18 can be embedded in the inside of the limiting groove 17 under the action of the rebound force of the spring 20, so that the connection and fixation of the motor protection cover 1, the gear box 2 and the connecting seat 3 can be achieved, and by rotating the second threaded rod 21, the second threaded rod 21 is extended in the vertical direction under the action of the threaded structure, so that one end thereof abuts against the adjacent position limiting block 18 to further limit it, and by rotating the connecting rod 24, the valve plate 23 can be rotated so that the valve plate 23 can seal or open the ventilation groove 22, and the filter screen 25 can play a filtering role to prevent the infiltration of external dust, and the rotation of the connecting rod 24 can drive the sleeve plate 26 to rotate, so that by rotating the bolt 28, it is embedded in the inside of the two threaded holes 27, so that the state of the multiple connecting rods 24 in sealing the ventilation groove 22 and the state of opening the ventilation groove 22 can be limited.

[0028] According to the above working process, it can be known that: when the motor protective cover 1 and the gear box 2 play a protective role, by placing the connecting seat 3 at the middle position of the motor protective cover 1 and the gear box 2, by rotating the first threaded rod 10, the limiting groove 17 can be extended to the inside of the adjacent position opening 19, so that the limiting block 18 can be extended to the inside of the adjacent position limiting groove 17, so that the motor protective cover 1 and the gear box 2 can be fixedly connected. Since the end cover is connected by threaded connection, unstable installation will not occur, thereby improving the practicality of the device. The ventilation groove 22 can be used to dissipate heat for the inner cavity of the motor protective cover 1, and the filter screen 25 can prevent external dust from entering the inner cavity of the motor protective cover 1. The ventilation groove 22 at the adjacent position can be sealed or opened by the rotatable valve plate 23, so that it can play a heat dissipation role when in use and be closed when not in use to isolate it from the external environment, thereby further improving the convenience of use of the device.

[0029] Further as Figure 4 and Figure 7 As shown, it is worth explaining in detail that the two ends of the surface of the valve plate 23 are arranged in an arc shape, and the surface on one side of the plug block 16 is arranged in an arc shape. Due to the shape of the valve plate 23, it will not get stuck inside the ventilation groove 22 when it rotates, and the shape of the plug block 16 ensures that the limiting block 18 will not get stuck when it moves.

[0030] In summary: when the motor shield 1 and the gear box 2 play a protective role, by placing the connecting seat 3 at the middle position of the motor shield 1 and the gear box 2, by rotating the first threaded rod 10, the limiting groove 17 can be extended to the inside of the adjacent position opening 19, so that the limiting block 18 can be extended to the inside of the adjacent position limiting groove 17, so that the motor shield 1 and the gear box 2 can be fixedly connected. Since the end caps connected by threaded connection are used for connection, unstable installation will not occur, thereby improving the practicality of the device, and the ventilation groove 22 can be used to It can dissipate heat for the inner cavity of the motor protection cover 1, and the filter screen 25 can prevent external dust from entering the inner cavity of the motor protection cover 1. The rotatable valve plate 23 can seal or open the adjacent ventilation groove 22, so that it can dissipate heat when in use and be closed when not in use to isolate it from the external environment, thereby further improving the convenience of use of the device. Due to the shape of the valve plate 23, it will not get stuck in the ventilation groove 22 when it rotates, and the shape of the plug block 16 will prevent the limiting block 18 from getting stuck when it moves.

Claims

1. A pitch motor oil leakage prevention device, comprising a motor protection cover (1), characterized in that: A gear box (2) is arranged on one side of the motor protective cover (1), and a connecting seat (3) is arranged at a middle position between the motor protective cover (1) and the gear box (2). A variable pitch motor body (4) is fixed to the inner cavity of the motor protective cover (1), and the output end of the variable pitch motor body (4) passes through the motor protective cover (1) and extends to the inner cavity position of the gear box (2). Two rod grooves (9) are arranged on the surfaces of the upper and lower ends of the connecting seat (3), and four openings (19) are arranged on the surfaces of the motor protective cover (1) and the gear box (2) on the side close to each other. First threaded rods (10) are rotatably connected to the two sides of the inner wall of the rod groove (9), and a U-shaped support seat (11) is fixed at a middle position inside the rod groove (9). The first threaded rod (10) and the support seat (11) are rotatably connected. The outer circumferential surface of the first threaded rod (10) is threadedly connected with a threaded sleeve (15), and an insert block (16) is fixed on the top of the threaded sleeve (15). One side of the insert block (16) extends to the inside of the adjacent position opening (19). A limiting groove (17) is provided on the surface of the top of the insert block (16), and a limiting block (18) is inserted at the top of the limiting groove (17). Springs (20) are fixed at both ends of the top surface of the limiting block (18), and the top of the spring (20) is fixed to the inner wall of the adjacent position opening (19). The motor protective cover (1) and the gear box (2) are threadedly connected with a second threaded rod (21) at one end of the opening (19), and one end of the second threaded rod (21) extends to the inside of the adjacent position opening (19) and is rotatably connected to the surface of the adjacent position limiting block (18).

2. The pitch motor oil leakage prevention device according to claim 1, characterized in that: One end of the support seat (11) is rotatably connected to a movable shaft (13), one end of the movable shaft (13) extends to the inner cavity position of the rod groove (9) at the adjacent position, a first bevel gear (12) is fixedly sleeved on the outer circumference of the first threaded rod (10) near the position of the movable shaft (13) at the adjacent position, a second bevel gear (14) is fixedly sleeved on the outer circumference of the movable shaft (13), and the movable shaft (13) is meshingly connected to the two adjacent first bevel gears (12).

3. The pitch motor oil leakage prevention device according to claim 1, characterized in that: An oil seal ring (5) is sleeved on the outer circumference of the variable pitch motor body (4) at the positions of the inner cavity of the motor protective cover (1) and the inner cavity of the gear box (2); a rotating sleeve (6) is fixed to the outer circumference of the oil seal ring (5); limiting grooves (7) are provided on both sides of the rotating sleeve (6) in the inner cavities of the motor protective cover (1) and the gear box (2); a limiting ring (8) is movably inserted inside the limiting groove (7); one side of the limiting ring (8) passes through the limiting groove (7) at an adjacent position and is fixed to the surface of the rotating sleeve (6) at an adjacent position.

4. The pitch motor oil leakage prevention device according to claim 1, characterized in that: The top of the inner cavity of the motor protective cover (1) is connected to a plurality of ventilation grooves (22), a valve plate (23) is arranged at the top position of the inner cavity of the ventilation groove (22), a connecting rod (24) is fixed to one side of the valve plate (23), one side of one group of the connecting rods (24) is fixed to the surface of another valve plate (23), and one side of the remaining connecting rod (24) extends out of the motor protective cover (1), and a filter net (25) is fixed to the bottom of the inner cavity of the ventilation groove (22).

5. The pitch motor oil leakage prevention device according to claim 4, characterized in that: One of the connecting rods (24) extends out of the surface of the outer part of the motor protective cover (1) and is fixedly sleeved with a sleeve plate (26). The surface of the motor protective cover (1) away from the gear box (2) is provided with two threaded holes (27). The surface of the sleeve plate (26) is threadedly connected with a bolt (28), and one side of the bolt (28) extends to the inside of the adjacent threaded hole (27).

6. The pitch motor oil leakage prevention device according to claim 5, characterized in that: The two ends of the surface of the valve plate (23) are arranged in an arc shape, and the surface of one side of the plug block (16) is arranged in an arc shape.

Images