Adaptive motor shaft seal structure

Abstract

The application discloses a self-adaptive motor shaft seal structure and belongs to the mechanical seal field. The self-adaptive motor shaft seal structure comprises a dynamic ring assembly and a static ring assembly which are arranged on a motor shaft and are matched with each other to form an end face seal. One side of the dynamic ring assembly is provided with a first boss, one side of the static ring assembly is provided with a second boss, and the first boss and the second boss are arranged in parallel and are matched with each other. The side of the dynamic ring assembly provided with the first boss is further provided with a plurality of containing holes which are located on the outer side of the first boss. A graphite column is arranged in each containing hole, and the graphite column is matched with the side of the static ring assembly provided with the second boss. The first boss and the second boss of the dynamic ring assembly and the static ring assembly are matched in parallel to form the end face seal, so that the internal liquid of the motor is effectively prevented from leaking and the external impurities are effectively prevented from entering the internal motor.

Description

Technical Field

[0001] This application relates to the field of mechanical seals, specifically to an adaptive motor shaft seal structure. Background Technology

[0002] Currently, many motors used in production and daily life need to be submerged in water, such as washing machines, soy milk makers, and blenders. The motor shaft must extend out during operation, placing high demands on the seal between the motor shaft and the bushing. A motor shaft seal is a sealing device used in motors to effectively prevent internal liquid leakage and the entry of external impurities into the motor.

[0003] Chinese patent document CN222102563U discloses a multifunctional motor bearing sealing structure, including a main shaft and a bearing body sleeved on the outside of the main shaft. A first retaining sleeve is provided on the outer side of the outer ring of the bearing body. A second retaining sleeve is fixedly connected to one side of the first retaining sleeve by bolts. The second retaining sleeve is sleeved on the outside of the main shaft. An annular inner groove is formed inside the second retaining sleeve, and an extrusion member is installed inside the annular inner groove. This invention first injects lubricating oil into the annular inner groove. As the lubricating oil is injected, the resulting pressure pushes the extrusion member to contract, maintaining pressure on the lubricating oil. During operation, as the lubricating oil is consumed, the extrusion member gradually resets, pushing the lubricating oil to maintain a certain pressure and enter the gaps inside the bearing body, thus maintaining the lubricating oil's effectiveness. This achieves the advantage of maintaining good lubricating oil pressure entering the rotating gaps, ensuring effective lubrication.

[0004] However, the aforementioned patents suffer from poor adaptive performance and strong dependence on lubricating oil. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this application provides an adaptive motor shaft seal structure.

[0006] This application adopts the following technical solution: an adaptive motor shaft seal structure, including a dynamic ring assembly and a stationary ring assembly passing through the motor shaft, wherein the dynamic ring assembly and the stationary ring assembly are fitted together to form an end face seal, the dynamic ring assembly has a first protrusion on the side facing the stationary ring assembly, and the stationary ring assembly has a second protrusion on the side facing the dynamic ring assembly, the first protrusion and the second protrusion are arranged in parallel and fitted together; The moving ring assembly has a plurality of receiving holes on one side of the first boss. The receiving holes are located outside the first boss. Each receiving hole contains a graphite column, which is fitted to the side of the stationary ring assembly with the second boss.

[0007] By adopting the above technical solution, the dynamic ring assembly and the stationary ring assembly are fitted together to form an end face seal, and the parallel fitting of the first boss and the second boss can enhance the sealing effect; the graphite column in the receiving hole is fitted with the stationary ring assembly, and the graphite column has self-lubricating properties, which can reduce the friction between the dynamic ring assembly and the stationary ring assembly, improve the self-adaptive ability, and reduce the dependence on lubricating oil.

[0008] Optionally, a plurality of the receiving holes are spaced apart circumferentially, and a plurality of notches are provided on the outer edge of the first boss. The plurality of notches and the plurality of receiving holes are respectively and corresponding to each other. The graphite powder generated by the friction between the graphite column and the stationary ring assembly enters between the first boss and the second boss through the notches.

[0009] By adopting the above technical solution, the first and second bosses of the dynamic ring assembly and the stationary ring assembly fit together to form an end face seal. The graphite pillars in the circumferentially spaced receiving holes fit with the stationary ring assembly. The graphite powder generated by the friction between the graphite pillars and the stationary ring assembly can enter between the first and second bosses through the notches on the outer edge of the first boss that correspond one-to-one with the receiving holes, playing a lubricating role, improving the self-adaptive ability of the shaft seal structure, and reducing the dependence on lubricating oil.

[0010] Optionally, the outer wall of the moving ring assembly is provided with a plurality of first threaded holes, and the plurality of first threaded holes and the plurality of receiving holes are respectively and corresponding to each other. The corresponding first threaded holes and the receiving holes are interconnected. A pushing block is adaptedly screwed into the first threaded hole. One end of the graphite column contacts the stationary ring assembly, and the other end of the graphite column contacts the pushing block. The pushing block is used to push the graphite column to fit into the stationary ring assembly.

[0011] By adopting the above technical solution, the dynamic ring assembly and the stationary ring assembly are fitted together to form an end face seal. The first boss and the second boss are fitted in parallel. The graphite column is fitted with the stationary ring assembly. The receiving holes are spaced apart circumferentially and the notches correspond to the receiving holes, allowing graphite powder to enter between the first boss and the second boss. The pushing block is threadedly connected to the first threaded hole, and the first threaded hole and the receiving hole are L-shaped, which can push the graphite column to fit with the stationary ring assembly. This can effectively improve the self-adaptive ability of the motor shaft seal structure and reduce the dependence on lubricating oil.

[0012] Optionally, the push block is connected to the first threaded hole by a thread, and the first threaded hole is L-shaped after communicating with the receiving hole.

[0013] By adopting the above technical solution, it is ensured that the pusher block can drive the graphite column to produce displacement.

[0014] Optionally, the bottom of the push block contacts the graphite column, and the top of the push block is provided with an internal hexagonal hole for inserting a hexagonal wrench.

[0015] By adopting the above technical solution, the top of the push block is provided with an internal hexagonal hole to facilitate the operation of the push block with a hexagonal wrench, thereby better adjusting the push block to push the graphite column, further ensuring the fit between the graphite column and the stationary ring assembly, and improving the sealing performance.

[0016] Optionally, the stationary ring assembly includes a first ring body and a second ring body, and the first ring body and the second ring body are connected by a plurality of springs; The first ring body is provided with a stepped hole, and the second ring body is provided with a second threaded hole. An adjusting screw is screwed into the stepped hole and the second threaded hole. The tail of the adjusting screw fits into the stepped surface of the stepped hole, and the head of the adjusting screw is adapted to be screwed into the second threaded hole.

[0017] By adopting the above technical solution, the initial elastic force of the spring can be adjusted, thereby improving the adaptability of the stationary ring assembly.

[0018] In summary, this application includes the following beneficial technical effects: 1. The first and second bosses of the rotating ring assembly and the stationary ring assembly are fitted in parallel to form an end face seal, which effectively prevents internal liquid leakage and external impurities from entering the motor. 2. The graphite pillars inside the receiving hole fit snugly against the stationary ring assembly, avoiding strong dependence on lubricating oil; 3. The graphite powder generated by the friction of the graphite column enters between the first and second protrusions through the notch, improving the self-adaptive effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a reference diagram showing the separation state of the dynamic ring assembly, graphite column, and push block; Figure 3 This is a schematic 3D view of the stationary ring assembly; Figure 4 This is a cross-sectional view of the internal structure of the stationary ring assembly; In the diagram: 1. Moving ring assembly; 11. First boss; 110. Notch; 12. Receiving hole; 13. Graphite pillar; 14. First threaded hole; 15. Push block; 150. Socket hexagon hole; 2. Stationary ring assembly; 21. Second boss; 22. First ring body; 220. Stepped hole; 23. Second ring body; 230. Second threaded hole; 24. Spring; 25. Adjusting screw. Detailed Implementation

[0020] The present application will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0021] like Figure 1-4 As shown, an adaptive motor shaft seal structure includes a dynamic ring assembly 1 and a stationary ring assembly 2 that pass through the motor shaft. The dynamic ring assembly 1 and the stationary ring assembly 2 are attached to each other to form an end face seal, which can block the passage path of liquid and impurities, thereby preventing liquid leakage inside the motor and preventing external impurities from entering the motor.

[0022] The rotating ring assembly 1 includes a first boss 11 and a receiving hole 12. The first boss 11 is located on the side of the rotating ring assembly 1 facing the stationary ring assembly 2, and the first boss 11 can be integrally formed with the rotating ring assembly 1. The receiving hole 12 is located on the side of the rotating ring assembly 1 with the first boss 11, and is located outside the first boss 11. The receiving hole 12 is used to place graphite pillars 13, and each receiving hole 12 is provided with a graphite pillar 13. The graphite pillar 13 is in contact with the side of the stationary ring assembly 2 with the second boss 21. The graphite pillar 13 has good self-lubricating and wear-resistant properties. The graphite pillar 13 and the receiving hole 12 can be in clearance fit to allow the graphite pillar 13 to have a certain amount of movement space within the receiving hole 12. The stationary ring assembly 2 includes a second boss 21, which is located on the side of the stationary ring assembly 2 facing the rotating ring assembly 1, and is parallel to and in contact with the first boss 11. The second boss 21 can be an integrally formed structure with the stationary ring assembly 2. The shape and size of the second boss 21 are adapted to the first boss 11 to ensure that the two can fit tightly together. The mating surfaces of the first boss 11 and the second boss 21 are precision machined to ensure high flatness and smoothness, thereby improving the sealing effect.

[0023] A plurality of receiving holes 12 are spaced apart circumferentially, which allows the graphite pillars 13 to be evenly distributed in the circumferential direction of the moving ring assembly 1, thereby better performing the sealing and lubrication functions. The outer edge of the first boss 11 is provided with a plurality of notches 110, which are respectively and one-to-one corresponding to the plurality of receiving holes 12. Graphite powder generated by the friction between the graphite pillars 13 and the stationary ring assembly 2 enters between the first boss 11 and the second boss 21 through the notches 110. The notches 110 can be rectangular or trapezoidal grooves formed on the outer edge of the first boss 11 by milling or other machining methods, providing a channel for the graphite powder to enter between the sealing surfaces, thus playing a role in lubrication and sealing.

[0024] The outer wall of the rotating ring assembly 1 is provided with a plurality of first threaded holes 14, which are respectively and one-to-one with a plurality of receiving holes 12. The corresponding first threaded holes 14 and receiving holes 12 are interconnected, and a push block 15 is adaptedly screwed into the first threaded hole 14. The push block 15 and the first threaded hole 14 are connected by threads, and the first threaded hole 14 and the receiving hole 12 are L-shaped after being connected. The bottom of the push block 15 contacts the graphite column 13, and the top of the push block 15 is provided with an internal hexagonal hole 150 for inserting a hexagonal wrench. By inserting a hexagonal wrench into the internal hexagonal hole 150, the push block 15 can be rotated, causing it to move in the first threaded hole 14, thereby pushing the graphite column 13 to fit against the stationary ring assembly 2, ensuring that the graphite column 13 and the stationary ring assembly 2 always maintain good contact and sealing effect, and also facilitating the replacement of the graphite column 13.

[0025] The stationary ring assembly 2 includes a first ring body 22 and a second ring body 23, which are connected by several springs 24. Under the action of the springs 24, a certain elastic pressure is maintained between the first ring body 22 and the second ring body 23, thereby ensuring the tight fit between the stationary ring assembly 2 and the moving ring assembly 1. The first ring body 22 is provided with a stepped hole 220, and the second ring body 23 is provided with a second threaded hole 230. An adjusting screw 25 is screwed into the stepped hole 220 and the second threaded hole 230. The tail of the adjusting screw 25 is in contact with the stepped surface of the stepped hole 220, and the head of the adjusting screw 25 is adapted to be screwed into the second threaded hole 230. The adjusting screw 25 can be rotated to adjust the distance between the first ring body 22 and the second ring body 23, thereby adjusting the initial elastic force of the springs 24 and ensuring that the stationary ring assembly 2 can adaptively maintain a close fit with the moving ring assembly 1.

[0026] The implementation principle of this embodiment is as follows: the end face seal is formed by the contact of the moving ring assembly 1 and the stationary ring assembly 2, effectively preventing internal liquid leakage and the entry of external impurities. The graphite column 13 utilizes its self-lubricating and wear-resistant properties, reducing dependence on lubricating oil. The contact degree between the graphite column 13 and the stationary ring assembly 2 can be adjusted by the push block 15, ensuring the stability of the sealing effect. The first ring body 22 and the second ring body 23 in the stationary ring assembly 2 are connected by a spring 24 and can be adjusted by the adjusting screw 25, further improving the self-adaptive capability of the shaft seal structure.

[0027] The above embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of protection of this application. Any non-substantial changes and substitutions made by those skilled in the art based on this application shall fall within the scope of protection claimed by this application.

Claims

1. An adaptive motor shaft seal structure, comprising a dynamic ring assembly (1) and a stationary ring assembly (2) passing through a motor shaft, wherein the dynamic ring assembly (1) and the stationary ring assembly (2) are fitted together to form an end face seal, characterized in that, The moving ring assembly (1) has a first boss (11) on the side facing the stationary ring assembly (2), and the stationary ring assembly (2) has a second boss (21) on the side facing the moving ring assembly (1). The first boss (11) and the second boss (21) are arranged in parallel and fit together. The moving ring assembly (1) is provided with a number of receiving holes (12) on one side of the first boss (11). The receiving holes (12) are located outside the first boss (11). Each receiving hole (12) is provided with a graphite column (13). The graphite column (13) is attached to the side of the stationary ring assembly (2) provided with the second boss (21).

2. The adaptive motor shaft seal structure according to claim 1, characterized in that, A plurality of the receiving holes (12) are arranged circumferentially, and a plurality of notches (110) are provided on the outer edge of the first boss (11). The plurality of notches (110) and the plurality of receiving holes (12) are respectively and corresponding to each other. The graphite powder generated by the friction between the graphite column (13) and the stationary ring assembly (2) enters between the first boss (11) and the second boss (21) through the notches (110).

3. The adaptive motor shaft seal structure according to claim 2, characterized in that, The outer wall of the moving ring assembly (1) is provided with a plurality of first threaded holes (14), and the plurality of first threaded holes (14) and the plurality of receiving holes (12) are respectively and corresponding to each other. The corresponding first threaded holes (14) and the receiving holes (12) are interconnected. A push block (15) is adaptedly screwed into the first threaded hole (14). One end of the graphite column (13) is in contact with the stationary ring assembly (2), and the other end of the graphite column (13) is in contact with the push block (15). The push block (15) is used to push the graphite column (13) to fit with the stationary ring assembly (2).

4. The adaptive motor shaft seal structure according to claim 3, characterized in that, The push block (15) is connected to the first threaded hole (14) by a thread, and the first threaded hole (14) is L-shaped after communicating with the receiving hole (12).

5. The adaptive motor shaft seal structure according to claim 3, characterized in that, The bottom of the push block (15) contacts the graphite column (13), and the top of the push block (15) is provided with an internal hexagonal hole (150) for inserting a hexagonal wrench.

6. The adaptive motor shaft seal structure according to claim 1, characterized in that, The stationary ring assembly (2) includes a first ring body (22) and a second ring body (23), and the first ring body (22) and the second ring body (23) are connected by a plurality of springs (24); The first ring body (22) is provided with a stepped hole (220), and the second ring body (23) is provided with a second threaded hole (230). An adjusting screw (25) is screwed into the stepped hole (220) and the second threaded hole (230). The tail of the adjusting screw (25) is in contact with the stepped surface of the stepped hole (220), and the head of the adjusting screw (25) is adapted to be screwed into the second threaded hole (230).

Images