Motor sealing structure
Through the design of the cover body and oil seal, combined with the limit ring part and the weight reduction ring groove, the problem of water penetration in the submersible motor is solved, and the waterproof performance and service life are achieved, reducing production costs and maintenance difficulties.
Patent Information
- Application Number
- CN202421683866.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-07-16
AI Technical Summary
During the operation of the submersible motor, water easily penetrates into the motor from the connection between the motor shaft and the end cover, resulting in short circuit or corrosion problems, shortening the service life.
The cover body and oil seal structure are adopted. The outer ring of the oil seal is pressed against the inner wall of the limit space, and the inner ring is pressed against the outer ring of the motor shaft to form a seal. Combined with the limit ring part and the weight reduction ring groove design, it ensures the stability and sealing effect of the oil seal. At the same time, an inflatable component can be optionally equipped to enhance waterproof performance.
Improve the waterproof performance of submersible motors, extend service life, and reduce production costs and maintenance convenience.
Smart Images
Figure CN223218926U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of motor components, and in particular to a motor sealing structure. Background Art
[0002] A submersible motor is an electric motor specially developed for use underwater. It is directly connected to a pump and runs in water.
[0003] During the operation of the submersible motor, water can easily penetrate into the motor from the connection between the motor shaft and the end cover, causing the internal components of the motor to come into contact with water, causing short circuits or corrosion, thereby shortening the service life of the submersible motor. Utility Model Content
[0004] In order to improve the service life of a submersible motor, the present application provides a motor sealing structure.
[0005] This application provides a motor sealing structure, which adopts the following technical solutions:
[0006] A motor sealing structure includes a cover body and an oil seal, the cover body includes a connecting portion and a limiting ring portion, the connecting portion has a rotating hole for the motor shaft to pass through, the limiting ring portion is connected to the inner wall of the connecting portion, the axis of the limiting ring portion coincides with the axis of the rotating hole, the inner ring of the limiting ring portion has a limiting space for accommodating the oil seal, the outer ring of the oil seal presses against the inner wall of the limiting space to form a seal, and the inner ring of the oil seal presses against the outer ring of the motor shaft to form a seal.
[0007] By adopting the above technical solution, when the motor sealing structure is used, the oil seal and the rotating hole are sequentially passed through the end of the motor shaft, the surface of the oil seal presses against the inner wall of the connecting part to form a seal, the inner ring of the oil seal presses against the outer periphery of the motor shaft to form a seal, and the outer ring of the oil seal presses against the inner wall of the limiting space to form a seal, so that during the use of the submersible motor, water is not easy to enter the inner cavity of the connecting part through the connection between the motor shaft and the rotating hole, thereby improving the waterproof performance of the submersible motor and thus improving the service life of the submersible motor; at the same time, the inner wall of the limiting space presses against the outer ring of the oil seal to form a limit, so that the oil seal is not easy to deviate in the limiting space, thereby ensuring the stability of the pressing between the inner ring of the oil seal and the outer periphery of the motor shaft.
[0008] Optionally, a weight-reducing ring groove is provided on a surface of the connecting portion facing away from the limiting ring portion, and the axis of the weight-reducing ring groove coincides with the axis of the rotating hole.
[0009] By adopting the above technical solution, the weight-reducing ring groove is located on the surface of the connecting part away from the limiting ring part, which reduces the input of production materials for the motor sealing structure, thereby reducing the production cost of the motor sealing structure. At the same time, the limiting ring part provides support for the connecting part, thereby ensuring the structural strength of the submersible motor.
[0010] Optionally, a sealing ring is connected to the surface of the connecting portion that abuts the motor, and the connecting portion and the motor clamp both sides of the sealing ring to form a seal.
[0011] By adopting the above technical solution, when the connecting part is installed on the surface of the motor, the surface of the connecting part and the surface of the motor clamp the two sides of the sealing ring to form a seal, making it difficult for water to penetrate into the inner cavity of the connecting part through the connection between the connecting part and the motor, further improving the waterproof performance of the submersible motor, thereby extending the service life of the submersible motor.
[0012] Optionally, a positioning ring groove for embedding the sealing ring is opened on the surface of the connecting portion, and the inner wall of the positioning ring groove and the surface of the motor can clamp both sides of the sealing ring to form a seal.
[0013] By adopting the above technical solution, when the sealing ring is embedded in the positioning ring groove, the inner wall of the positioning ring groove abuts against the surface of the sealing ring to form a limit, making it difficult for the sealing ring to shift in the positioning ring groove, thereby achieving the limiting stability of the sealing ring on the connection part.
[0014] Optionally, a plurality of connection holes for bolts to pass through are opened on the surface of the connection portion, and the bolts can pass through the connection holes and be screwed and fixed to the surface of the motor.
[0015] By adopting the above technical solution, when the surface of the connection part abuts against the surface of the motor, the bolts are passed through the connection holes and screwed and fixed to the surface of the motor, thereby completing the installation of the motor sealing structure and the motor. When the inner cavity of the motor sealing structure needs to be repaired, the bolts are unscrewed to separate the motor sealing structure and the motor, thereby facilitating the repair of the motor sealing structure.
[0016] Optionally, a deformation ring cavity is provided in the sealing ring.
[0017] By adopting the above technical solution, when the air in the deformation ring cavity heats up and expands, the air in the deformation ring cavity squeezes the inner wall of the deformation ring cavity to deform, driving the two sides of the sealing ring to press against the inner wall of the positioning ring groove and the surface of the motor to form a seal, further improving the waterproof performance of the submersible motor.
[0018] Optionally, an inflation component is connected to the sealing ring, and the inflation component includes an inflation piston and an elastic member. An inflation flow channel is opened on the surface of the sealing ring for the inflation piston to slide, and the inflation flow channel is connected to the deformation ring cavity. One end of the elastic member in the elastic direction is connected to the inner wall of the inflation flow channel, and the other end of the elastic member in the elastic direction is connected to the surface of the inflation piston. The elastic member has the elastic force to drive the inflation piston to slide in the direction away from the deformation ring cavity, and the surface of the inflation piston tends to be flush with the surface of the sealing ring.
[0019] By adopting the above technical solution, when the inner wall of the positioning ring groove and the surface of the motor clamp the two sides of the sealing ring to form a seal, the inflation piston is driven to slide along the inner wall of the inflation flow channel toward the direction close to the deformation ring cavity, the air pressure in the inflation flow channel increases, the inflation flow channel is connected to the deformation ring cavity, the air in the inflation flow channel enters the deformation ring cavity, the air pressure in the deformation ring cavity increases, the outer periphery of the sealing ring is compressed and deformed, the inner wall of the positioning ring groove and the surface of the motor clamp the two sides of the sealing ring to form a seal, thereby further improving the waterproof performance of the submersible motor.
[0020] Optionally, the inflation assembly further includes a driving block connected to the inner wall of the positioning ring groove, and the driving block can abut against the surface of the inflation piston and drive the inflation piston to slide in a direction close to the deformation ring cavity.
[0021] By adopting the above technical solution, when the sealing ring is embedded in the positioning ring groove, the end of the driving block abuts against the surface of the inflation piston and drives the inflation piston to slide along the inner wall of the inflation channel toward the deformation ring cavity, driving the air in the inflation channel into the deformation ring cavity, and the outer periphery of the sealing ring is pressurized and expanded, so that the inner wall of the positioning ring groove and the motor surface can clamp the two sides of the sealing ring to form a seal, thereby improving the waterproof performance of the submersible motor.
[0022] Optionally, a guide surface is provided on the surface of the driving block that abuts the inflation piston. The guide surface is in the shape of a circular arc protrusion. The guide surface can abut the surface of the sealing ring and guide the end of the driving block to be embedded in the inflation flow channel.
[0023] By adopting the above technical solution, the guide surface is in the shape of an arc convexity, which can abut the surface of the sealing ring and guide the end of the driving block to embed into the inflation flow channel, reducing the wear between the driving block and the sealing ring, thereby extending the service life of the sealing ring.
[0024] Optionally, the driving block is a water-swelling block.
[0025] By adopting the above technical solution, when water penetrates into the positioning ring groove, the water absorption expansion block absorbs water and expands, driving the inflation piston to slide along the inner wall of the inflation flow channel toward the deformation chamber, the inflation flow channel is pressurized, and the air in the inflation flow channel enters the deformation chamber. The air in the deformation chamber is pressurized and expanded, and the outer periphery of the sealing ring is pressurized and expanded. The two sides of the sealing ring are pressed against the inner wall of the positioning ring groove and the surface of the motor to form a seal, making it difficult for water to continue to penetrate into the positioning ring groove, thereby ensuring the waterproof performance of the submersible motor.
[0026] In summary, this application includes at least one of the following beneficial technical effects:
[0027] 1. The setting of the cover and oil seal prevents water from entering the inner cavity of the connection part through the connection between the motor shaft and the rotating hole during the use of the submersible motor, thereby improving the waterproof performance of the submersible motor and thus increasing the service life of the submersible motor;
[0028] 2. The setting of the sealing ring makes it difficult for water to penetrate into the inner cavity of the connecting part through the connection between the connecting part and the motor, further improving the waterproof performance of the submersible motor and thus extending the service life of the submersible motor;
[0029] 3. The setting of the positioning ring groove makes it difficult for the sealing ring to deviate in the positioning ring groove, thereby achieving the limiting stability of the sealing ring on the connection part. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.
[0031] Figure 2 It is a schematic diagram of the overall structure in an embodiment of the present application, mainly showing the weight-reducing ring groove.
[0032] Figure 3 It is a partial cross-sectional view in an embodiment of the present application.
[0033] Explanation of the accompanying drawings: 1. Cover body; 11. Connecting part; 111. Rotating hole; 112. Weight-reducing ring groove; 113. Connecting hole; 114. Positioning ring groove; 12. Limiting ring part; 121. Limiting space; 2. Oil seal; 3. Sealing ring; 31. Deformation ring cavity; 32. Inflation flow channel; 4. Inflation assembly; 41. Inflation piston; 42. Driving block; 421. Water absorption expansion block; 422. Guide surface; 43. Elastic part. DETAILED DESCRIPTION
[0034] The following is combined with Figure 1-3 This application is described in further detail.
[0035] The present application embodiment discloses a motor sealing structure. Figure 1 The motor sealing structure includes a cover body 1 and an oil seal 2. The cover body 1 includes a connecting portion 11 and a limiting ring portion 12. The surface of the connecting portion 11 has a rotating hole 111 for the motor shaft to pass through. The surface of the connecting portion 11 is stretched inward to form a limiting ring portion 12, and the axis of the limiting ring portion 12 coincides with the axis of the rotating hole 111; the material of the oil seal 2 can be rubber or silicone. In the embodiment of the present application, the material of the oil seal 2 is rubber, which has a certain deformation ability. The inner ring of the limiting ring portion 12 has a limiting space 121 for accommodating the oil seal 2. When the oil seal 2 is embedded in the limiting space 121, the surface of the oil seal 2 is pressed against the inner wall of the connecting portion 11 to form a seal, and the outer ring of the oil seal 2 is pressed against the inner wall of the limiting space 121 to form a seal, and the inner ring of the oil seal 2 is pressed against the outer periphery of the motor shaft to form a seal. Water is not easy to enter the inner cavity of the connecting portion 11 from the connection between the motor shaft and the rotating hole 111, thereby improving the waterproof performance of the submersible motor and thus improving the service life of the submersible motor.
[0036] Reference Figure 1 and Figure 2A weight-reducing ring groove 112 is formed on the surface of the connecting portion 11 away from the limiting ring portion 12. The axis of the weight-reducing ring groove 112 coincides with the axis of the rotating hole 111. A plurality of connecting holes 113 for bolts to pass through are opened on the surface of the connecting portion 11. The axes of the connecting holes 113 and the axes of the rotating holes 111 are parallel to each other. When the surface of the connecting portion 11 abuts against the surface of the motor, the bolts correspond one-to-one with the connecting holes 113. The ends of the bolts pass through the connecting holes 113 and are threadedly connected to the surface of the motor to achieve the installation and fixation of the cover body 1 and the motor.
[0037] Reference Figure 1 and Figure 2 The surface where the connecting part 11 abuts the motor is connected with a sealing ring 3. The material of the sealing ring 3 can be rubber or silicone. In the embodiment of the present application, the material of the sealing ring 3 is rubber, which has a certain deformation ability. The surface where the connecting part 11 abuts the motor is provided with a positioning ring groove 114 for the sealing ring 3 to be embedded. The axis of the positioning ring groove 114 coincides with the axis of the rotating hole 111. When the connecting part 11 is fixed to the surface of the motor by bolts, the inner wall of the positioning ring groove 114 and the surface of the motor clamp the two sides of the sealing ring 3 to form a seal, so that water is not easy to enter the inner cavity of the connecting part 11 through the connection between the connecting part 11 and the motor, thereby further improving the waterproof performance of the submersible motor.
[0038] Reference Figure 3 The sealing ring 3 has a deformation ring cavity 31, and an inflation component 4 is installed on the sealing ring 3. The inflation component 4 can supply air to the deformation ring cavity 31. The inflation component 4 includes an inflation piston 41, a driving block 42 and an elastic member 43. The material of the inflation piston 41 can be rubber or silicone. In the embodiment of the present application, the material of the inflation piston 41 is rubber and has a certain deformation ability. The elastic member 43 can be a compression spring or a tension spring. In the embodiment of the present application, the elastic member 43 is a compression spring and has a certain deformation ability. An inflation flow channel 32 for the inflation piston 41 to slide is opened on the surface of the sealing ring 3. The inflation flow channel 32 is connected to the deformation ring cavity 31. One end of the elastic member 43 in the elastic direction is fixed on the inner wall of the inflation flow channel 32, and the other end of the elastic member 43 in the elastic direction is fixed on the surface of the inflation piston 41. The elastic member 43 has elastic force to drive the inflation piston 41 to slide in the direction away from the deformation ring cavity 31, and the surface of the inflation piston 41 tends to be flush with the surface of the sealing ring 3.
[0039] Reference Figure 3The driving block 42 is a water-absorbing and expanding block 421. The material of the water-absorbing and expanding block 421 can be a water-absorbing resin or polyacrylamide gel. In the embodiment of the present application, the material of the water-absorbing and expanding block 421 is a water-absorbing resin with a good expansion coefficient. One end of the driving block 42 is fixed on the inner wall of the positioning ring cavity, and the other end of the driving block 42 is provided with a guide surface 422. The guide surface 422 is a circular arc convex shape. The guide surface 422 can abut the surface of the sealing ring 3 and guide the end of the driving block 42 to embed into the inflation flow channel 32. The guide surface 422 abuts the surface of the inflation piston 41 and drives the inflation piston 41 to slide in the direction close to the deformation ring cavity 31. The air pressure in the inflation flow channel 32 increases, and the air in the inflation flow channel 32 enters the deformation ring cavity 31. The deformation ring cavity 31 is pressurized and expanded, and the outer periphery of the sealing ring 3 is pressurized and expanded. The inner wall of the positioning ring groove 114 and the motor surface clamp the two sides of the sealing ring 3 to form a seal, thereby improving the waterproof performance of the submersible motor.
[0040] Reference Figure 3 When water enters the positioning ring groove 114 through the connection between the connecting part 11 and the motor, the water absorption expansion block 421 comes into contact with the water, absorbs water and expands, and drives the inflation piston 41 to continue to slide along the inner wall of the inflation channel 32 toward the direction close to the deformation ring cavity 31. The air in the inflation channel 32 enters the deformation ring cavity 31, and the air in the deformation ring cavity 31 is pressurized and expanded. The outer periphery of the sealing ring 3 is pressurized and expanded. The inner wall of the positioning ring groove 114 and the surface of the motor clamp the two sides of the sealing ring 3 to form a seal, making it difficult for water to continue to penetrate into the positioning ring groove 114 through the connection between the connecting part 11 and the motor, thereby improving the waterproof performance of the submersible motor.
[0041] The implementation principle of a motor sealing structure in an embodiment of the present application is: when the oil seal 2 is embedded in the limited space 121, the surface of the oil seal 2 is pressed against the inner wall of the connecting part 11 to form a seal, the outer ring of the oil seal 2 is pressed against the inner wall of the limited space 121 to form a seal, and the inner ring of the oil seal 2 is pressed against the outer periphery of the motor shaft to form a seal, so that water is not easy to enter the inner cavity of the connecting part 11 from the connection between the motor shaft and the rotating hole 111, thereby improving the waterproof performance of the submersible motor and thus extending the service life of the submersible motor.
[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. The motor sealing structure is characterized by: The invention comprises a cover body (1) and an oil seal (2), wherein the cover body (1) comprises a connecting portion (11) and a limiting ring portion (12), wherein the connecting portion (11) has a rotating hole (111) through which the motor shaft passes, and the limiting ring portion (12) is connected to the inner wall of the connecting portion (11), wherein the axis of the limiting ring portion (12) coincides with the axis of the rotating hole (111), and the inner ring of the limiting ring portion (12) has a limiting space (121) for accommodating the oil seal (2), wherein the outer ring of the oil seal (2) presses against the inner wall of the limiting space (121) to form a seal, and the inner ring of the oil seal (2) presses against the outer ring of the motor shaft to form a seal.
2. The motor sealing structure according to claim 1, characterized in that: A weight-reducing ring groove (112) is provided on the surface of the connecting portion (11) facing away from the limiting ring portion (12), and the axis of the weight-reducing ring groove (112) coincides with the axis of the rotating hole (111).
3. The motor sealing structure according to claim 1, wherein: The surface of the connecting portion (11) abutting against the motor is connected with a sealing ring (3), and the connecting portion (11) and the motor clamp the two sides of the sealing ring (3) to form a seal.
4. The motor sealing structure according to claim 3, characterized in that: The surface of the connecting portion (11) is provided with a positioning ring groove (114) for the sealing ring (3) to be embedded. The inner wall of the positioning ring groove (114) and the surface of the motor can clamp the two sides of the sealing ring (3) to form a seal.
5. The motor sealing structure according to claim 1, characterized in that: The surface of the connecting portion (11) is provided with a plurality of connecting holes (113) for bolts to pass through, and the bolts can pass through the connecting holes (113) and be screwed and fixed on the surface of the motor.
6. The motor sealing structure according to claim 3, characterized in that: The sealing ring (3) has a deformation ring cavity (31) therein.
7. The motor sealing structure according to claim 6, characterized in that: The sealing ring (3) is connected to an inflation component (4), and the inflation component (4) includes an inflation piston (41) and an elastic member (43). An inflation flow channel (32) for the inflation piston (41) to slide is provided on the surface of the sealing ring (3), and the inflation flow channel (32) is connected to the deformation ring cavity (31). One end of the elastic member (43) in the elastic direction is connected to the inner wall of the inflation flow channel (32), and the other end of the elastic member (43) in the elastic direction is connected to the surface of the inflation piston (41). The elastic member (43) has an elastic force that drives the inflation piston (41) to slide in a direction away from the deformation ring cavity (31), and the surface of the inflation piston (41) tends to be flush with the surface of the sealing ring (3).
8. The motor sealing structure according to claim 7, characterized in that: The inflation assembly (4) further includes a driving block (42), which is connected to the inner wall of the positioning ring groove (114). The driving block (42) can abut against the surface of the inflation piston (41) and drive the inflation piston (41) to slide in a direction close to the deformation ring cavity (31).
9. The motor sealing structure according to claim 8, characterized in that: The surface of the driving block (42) abutting against the inflation piston (41) is provided with a guide surface (422), the guide surface (422) being in the shape of a circular arc convexity, and the guide surface (422) can abut against the surface of the sealing ring (3) and guide the end of the driving block (42) to be embedded in the inflation flow channel (32).
10. The motor sealing structure according to claim 8, characterized in that: The driving block (42) is a water-absorbing expansion block (421).