High-rotating-speed motor oil seal

Abstract

The utility model discloses a high rotation speed motor oil seal which comprises a reinforcing ring, a sealing part and an oil blocking rib, the reinforcing ring is annular, the sealing part is annular and is arranged on the inner circumferential side of the reinforcing ring, the sealing part comprises a base part and a sealing lip, the base part is attached to the end of the inner circumferential side of the reinforcing ring, and the oil blocking rib is arranged on the base part. The end, away from the base part, of the sealing lip extends towards the peripheral side of the motor rotating shaft and abuts against the peripheral face of the motor rotating shaft, the oil blocking rib is arranged on the side, close to the sealing cavity, of the sealing lip, lubricating oil serving as a sealing medium is contained in the sealing cavity, and a gap is formed between the oil blocking rib and the motor rotating shaft. According to the high-rotation-speed motor oil seal, the oil blocking rib is arranged on one side of the sealing lip, leaked lubricating oil is adsorbed to the side, away from the sealing cavity, of the oil blocking rib through the tension of the lubricating oil when the oil seal rotates reversely, the leaked lubricating oil adsorbed to the oil blocking rib is sucked back into the sealing cavity when the oil seal rotates forwards, and the lubricating oil is prevented from leaking; the reversing capacity of the oil seal is improved, the sealing performance of products is improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of oil seal technology, and in particular relates to a high-speed motor oil seal. Background Technology

[0002] Currently, oil seals for motors typically consist of a skeleton, FKM (fluororubber), and a metal spring. While these seals offer some sealing functionality in practical applications, they have a significant drawback: oil leakage occurs when the shaft rotates at high speed and reverses direction, failing to meet the required sealing performance. This deficiency negatively impacts the normal operation of equipment and the working environment, necessitating improvements to adapt to the sealing requirements under conditions such as high-speed rotation and reverse rotation of the motor shaft. Utility Model Content

[0003] The purpose of this invention is to provide a high-speed motor oil seal to solve the problem of oil leakage caused by reverse rotation of the existing motor oil seal at high speed.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A high-speed motor oil seal, wherein the oil seal is fitted onto the motor shaft and rotates with the motor shaft, and includes a reinforcing ring, a sealing portion, and at least one ring of oil-blocking ribs, wherein:

[0006] The reinforcing ring is annular, and the sealing part is annular and disposed on the inner circumferential side of the reinforcing ring;

[0007] The sealing part includes a base and a sealing lip. The base is attached to the end of the inner circumferential side of the reinforcing ring. One end of the sealing lip is integrally connected to the base. The end of the sealing lip away from the base extends toward the outer circumferential side of the motor shaft and abuts against the outer circumferential surface of the motor shaft.

[0008] At least one oil-blocking rib is disposed on the side of the sealing lip near the sealing cavity. The sealing cavity contains lubricating oil as a sealing medium. There is a gap between the oil-blocking rib and the motor shaft. The oil-blocking rib is configured to absorb the leaked lubricating oil on the side away from the sealing cavity by the tension of the lubricating oil itself when the oil seal reverses. When the oil seal rotates forward, the lubricating oil that has leaked onto the oil-blocking rib is drawn back into the sealing cavity.

[0009] Furthermore, the oil-blocking ribs are provided in two rings, and the two rings of oil-blocking ribs are arranged parallel to each other along the axial direction of the sealing lip.

[0010] Further, the sealing lip has a lip front end portion having a first annular surface protruding toward an outer periphery of the motor rotating shaft, and a lip waist portion between the base portion and the first annular surface of the lip front end portion, and two rows of the oil blocking ribs are arranged in parallel and spaced apart on an end surface of the lip waist portion.

[0011] Further, the lip waist portion has a second annular surface which is reduced in diameter from the base portion toward the lip front end portion in the axial direction of the motor rotating shaft.

[0012] Further, the sealing portion includes a dust-proof lip having one end integrally connected to the base portion, and extending toward the motor rotating shaft side and abutting / spacing apart from the outer periphery side of the motor rotating shaft on a side away from the base portion, and the dust-proof lip is configured to prevent foreign matter from approaching the sealing lip.

[0013] Further, the dust-proof lip includes a dust-proof end portion having a third annular surface protruding toward an outer periphery of the motor rotating shaft, and a dust-proof waist portion between the base portion and the third annular surface of the dust-proof end portion.

[0014] Further, the dust-proof waist portion is arranged at a predetermined angle with respect to the lip waist portion.

[0015] Further, the sealing lip has a sealing lip inner side inner periphery surface and a sealing lip inner side outer periphery surface, wherein:

[0016] the sealing lip inner side outer periphery surface is the second annular surface, and the sealing lip inner side inner periphery surface is a fourth annular surface facing an inner periphery side and opposite to the sealing lip inner side outer periphery surface,

[0017] a side of the fourth annular surface close to the motor rotating shaft is in contact with a side of the second annular surface close to the motor rotating shaft to form the first annular surface.

[0018] Further, the base portion is attached to a face of the end portion of the inner periphery side of the reinforcing ring facing the sealing lip side;

[0019] the base portion has a base surface facing the sealing lip side face in the axial direction of the motor rotating shaft;

[0020] the sealing lip inner side inner periphery surface is connected to the base surface of the base portion;

[0021] an end portion of the sealing lip side of the sealing lip inner side inner periphery surface with respect to a face of the base portion facing the outer periphery side is reduced in diameter toward the lip front end portion in the axial direction of the motor rotating shaft.

[0022] Further, the sealing lip has an annular recessed portion on the outer circumferential side, which accommodates the inward circumferential side of the clamping spring, and the recessed portion is arranged opposite to the lip front end, and the inner circumferential surface of the sealing lip is connected with the recessed portion.

[0023] Compared with the prior art, the high-speed motor oil seal has the following beneficial effects:

[0024] 1) By arranging the oil blocking rib on the side of the sealing lip close to the sealing cavity, the oil blocking rib can adsorb the leaked lubricating oil on the side of the oil blocking rib away from the sealing cavity through the self-tension of the lubricating oil when the oil seal is reversed, and the leaked lubricating oil adsorbed on the oil blocking rib can be sucked back into the sealing cavity when the oil seal is rotated in the normal direction, thereby preventing the leakage of lubricating oil, improving the reverse rotation capability of the oil seal, improving the sealing performance of the product, and prolonging the service life;

[0025] 2) By arranging two rows of oil blocking ribs and arranging them in parallel and spaced apart along the axial direction of the sealing lip, the blocking and adsorption capability of the oil blocking ribs for the lubricating oil is further enhanced;

[0026] 3) By arranging the sealing lip, foreign matter can be effectively prevented from approaching the sealing lip, so that the sealing performance of the sealing lip is not affected or damaged by the foreign matter, the sealing performance of the entire oil seal is further ensured, the service life of the oil seal is prolonged, the sealing function of the oil seal can be more stably and reliably played in a high-speed working environment, and the possibility of failure caused by foreign matter interference is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate and understand the technical scheme in the embodiments of the present application, the drawings needed in the background art and embodiment description of the present application will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and these drawings.

[0028] Figure 1 is a cross-sectional structure schematic view of one side of the high-speed motor oil seal provided by the embodiments of the present application relative to the axis;

[0029] Figure 2 is a cross-sectional structure schematic view of the high-speed motor oil seal provided by the embodiments of the present application.

[0030] Figure 1 and Figure 2 include the following reference signs:

[0031] oil seal 10, motor shaft 11;

[0032] reinforcing ring 20;

[0033] Sealing portion 30, base portion 31, base surface 31a, sealing lip 32, lip front end portion 320, first annular surface 320a, fourth annular surface 320b, lip waist portion 321, second annular surface 321a, dust lip 33, dust lip end portion 330, third annular surface 330a, dust lip waist portion 331;

[0034] Oil blocking rib 40;

[0035] Clamping spring 50, recess 50a. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be further described below in conjunction with the drawings and through specific embodiments.

[0037] For the convenience of understanding the present application, the present application will be described more fully with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a middle component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] Hereinafter, the embodiments of the present application will be described with reference to the accompanying drawings:

[0039] It should be noted that: for the convenience of explanation, in the direction of the axis x (refer to Figure 1 ), the side in the direction of the arrow a (refer to Figure 1 ) is set as the outer side, and in the direction of the axis x, the side in the direction of the arrow b (refer to Figure 1 ) is set as the inner side. The inner side becomes the side of the sealing object. In addition, in the direction perpendicular to the axis x (hereinafter also referred to as "radial direction"), the direction away from the axis x (the direction of the arrow c of Figure 1 ) is set as the outer peripheral side, and the direction close to the axis x (the direction of the arrow d of Figure 1 ) is set as the inner peripheral side.

[0040] Referring to Figure 1 As shown in the drawings, in the embodiment of the application, a high-speed motor oil seal 10 is sleeved on a motor rotating shaft 11 and rotates with the motor rotating shaft 11, Figure 1 The cross-sectional view of the high-speed motor oil seal (hereinafter referred to as "oil seal") according to the embodiment of the present application is a cross-sectional view along the axis x. The oil seal 10 according to the present application is a sealing device for achieving sealing between a shaft and a hole for inserting the shaft, and is particularly used for a high-speed motor oil seal 10, for example, a gap between a plunger and a hole for passing the plunger provided in a motor, for achieving sealing of lubricating oil in a motor pump. In addition, the application object of the oil seal 10 is not limited to the above-mentioned object.

[0041] Referring to Figure 1 and Figure 2 As shown in the drawings, in the embodiment of the application, a high-speed motor oil seal 10 includes a reinforcing ring 20, a sealing part 30, and at least one circle of oil blocking ribs 40, wherein: the reinforcing ring 20 is annular, the reinforcing ring 20 is an annular component around the axis x, and the sealing part 30 is annular and arranged on the inner circumferential side of the reinforcing ring 20; the sealing part 30 includes a base 31 and a sealing lip 32, the base 31 is attached to the end of the inner circumferential side of the reinforcing ring 20, one end of the sealing lip 32 is integrally connected with the base 31, and the end of the sealing lip 32 away from the base 31 extends towards the outer circumferential side of the motor rotating shaft 11 and abuts on the outer circumferential surface of the motor rotating shaft 11; at least one circle of oil blocking ribs 40 is arranged on the side of the sealing lip 32 close to the sealing cavity, the sealing cavity has lubricating oil as a sealing medium, and the oil blocking ribs 40 have a gap with the motor rotating shaft 11, the oil blocking ribs 40 are configured to adsorb the leaked lubricating oil on the side of the oil blocking ribs 40 away from the sealing cavity by the self-tension of the lubricating oil when the oil seal 10 is reversed, and the leaked lubricating oil adsorbed on the oil blocking ribs 40 is sucked back into the sealing cavity when the oil seal 10 is rotated in the normal direction.

[0042] Specifically, the cross section of the reinforcing ring 20 is an "L" type structure, and the sealing part 30 is made of FKM material as a whole.

[0043] As can be seen, by arranging the oil blocking ribs 40 on the side of the sealing lip 32 close to the sealing cavity, the oil blocking ribs 40 adsorb the leaked lubricating oil on the side of the oil blocking ribs 40 away from the sealing cavity by the self-tension of the lubricating oil when the oil seal 10 is reversed, and the leaked lubricating oil adsorbed on the oil blocking ribs 40 is sucked back into the sealing cavity when the oil seal 10 is rotated in the normal direction, thereby preventing the leakage of lubricating oil, improving the reverse rotation capability of the oil seal 10, improving the sealing performance of the product, and prolonging the service life.

[0044] As an embodiment, the oil blocking ribs 40 are provided with two circles, and the two circles of oil blocking ribs 40 are arranged in parallel and spaced apart along the axial direction of the sealing lip 32.

[0045] Of course, as another embodiment, the oil blocking ribs 40 can also be provided with three circles, and the three circles of the oil blocking ribs 40 are arranged in parallel and spaced apart in the axial direction of the sealing lip 32, and the number of circles of the oil blocking ribs 40 is not limited here.

[0046] It can be seen that by arranging two circles of the oil blocking ribs 40 and arranging them in parallel and spaced apart in the axial direction of the sealing lip 32, the blocking and adsorption capacity of the lubricating oil is further enhanced.

[0047] As an embodiment, the sealing lip 32 has a lip front end portion 320 and a lip waist portion 321, the lip front end portion 320 has a first annular face 320a protruding outwardly towards the outer periphery of the motor shaft 11, and the lip waist portion 321 is located between the base portion 31 and the first annular face 320a of the lip front end portion 320, and the two circles of the oil blocking ribs 40 are arranged in parallel and spaced apart on the end face of the lip waist portion 321.

[0048] As an embodiment, the lip waist portion 321 has a second annular face 321a, and the second annular face 321a is reduced in diameter from the base portion 31 towards the lip front end portion 320 in the axial direction x of the motor shaft 11.

[0049] As an embodiment, the sealing portion 30 includes a dust-proof lip 33, one end of the dust-proof lip 33 is integrally connected with the base portion 31, and the side of the dust-proof lip 33 away from the base portion 31 extends towards the side of the motor shaft 11 and is arranged in abutment with the outer peripheral side of the motor shaft 11, and the dust-proof lip 33 is configured to prevent foreign matter from approaching the sealing lip 32.

[0050] Of course, as another embodiment, the sealing portion 30 includes a dust-proof lip 33, one end of the dust-proof lip 33 is integrally connected with the base portion 31, and the side of the dust-proof lip 33 away from the base portion 31 extends towards the side of the motor shaft 11 and is arranged in spaced apart with the outer peripheral side of the motor shaft 11, and the dust-proof lip 33 is configured to prevent foreign matter from approaching the sealing lip 32.

[0051] It can be seen that by arranging the sealing lip 32, foreign matter can be effectively prevented from approaching the sealing lip 32, and damage or influence on the sealing performance of the sealing lip 32 by foreign matter can be avoided, further ensuring the sealing performance of the oil seal 10 as a whole, prolonging the service life of the oil seal 10, and enabling the oil seal 10 to more stably and reliably play a sealing role in a high-speed working environment, and reducing the possibility of failure due to foreign matter interference.

[0052] As an embodiment, the dust-proof lip 33 includes a dust-proof end portion 330 and a dust-proof waist portion 331, the dust-proof end portion 330 has a third annular face 330a protruding outwardly towards the outer periphery of the motor shaft 11, and the dust-proof waist portion 331 is located between the base portion 31 and the third annular face 330a of the dust-proof end portion 330.

[0053] As an embodiment, the dust-proof waist portion 331 is arranged at a preset angle with the lip waist portion 321.

[0054] Specifically, the dustproof waist 331 and the lip waist 321 form a preset angle of 0° to 180°.

[0055] In one embodiment, the sealing lip 32 has an inner circumferential surface on the inner side of the sealing lip ( Figure 1 (in the direction indicated by the middle arrow b) and the inner outer circumferential surface of the sealing lip ( Figure 1 (in the direction indicated by the middle arrow a), wherein: the inner outer circumferential surface of the sealing lip is the second annular surface 321a, the inner circumferential surface of the sealing lip is the fourth annular surface 320b which faces outward and is opposite to the inner outer circumferential surface of the sealing lip, and the side of the fourth annular surface 320b near the motor shaft 11 contacts the side of the second annular surface 321a near the motor shaft 11 to form the first annular surface 320a.

[0056] In one embodiment, the base 31 is attached to the side of the inner circumferential end of the reinforcing ring 20 facing the sealing lip 32; the base 31 has a base surface 31a facing the side of the sealing lip 32 in the x-axis direction of the motor shaft 11; the inner circumferential surface of the sealing lip is connected to the base surface 31a of the base 31; the inner circumferential surface of the sealing lip is narrower toward the front end 320 of the lip in the x-axis direction of the motor shaft 11 relative to the end of the sealing lip 32 facing the outer circumferential side of the base 31.

[0057] In one embodiment, the sealing lip 32 has an annular recess 50a on its outer peripheral side that accommodates the clamping spring 50 and is recessed inward. The recess 50a is disposed opposite to the front end of the lip, and the inner peripheral surface of the inner side of the sealing lip is connected to the recess 50a.

[0058] In this way, when the oil seal 10 reverses, the oil-blocking rib 40 uses the tension of the lubricating oil itself to absorb the leaked lubricating oil on the side of the oil-blocking rib 40 away from the sealing cavity. When the oil seal 10 rotates forward, the lubricating oil that has leaked onto the oil-blocking rib 40 is drawn back into the sealing cavity, preventing lubricating oil leakage, improving the reversing ability of the oil seal 10, improving the sealing performance of the product, and extending its service life.

[0059] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above examples. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-speed motor oil seal, wherein the oil seal is fitted onto the motor shaft and rotates with the motor shaft, characterized in that, The high-speed motor oil seal includes a reinforcing ring, a sealing part, and at least one ring of oil-blocking ribs, wherein: The reinforcing ring is annular, and the sealing part is annular and disposed on the inner circumferential side of the reinforcing ring; The sealing part includes a base and a sealing lip. The base is attached to the end of the inner circumferential side of the reinforcing ring. One end of the sealing lip is integrally connected to the base. The end of the sealing lip away from the base extends toward the outer circumferential side of the motor shaft and abuts against the outer circumferential surface of the motor shaft. At least one oil-blocking rib is disposed on the side of the sealing lip near the sealing cavity. The sealing cavity contains lubricating oil as a sealing medium. There is a gap between the oil-blocking rib and the motor shaft. The oil-blocking rib is configured to absorb the leaked lubricating oil on the side away from the sealing cavity by the tension of the lubricating oil itself when the oil seal reverses. When the oil seal rotates forward, the lubricating oil that has leaked onto the oil-blocking rib is drawn back into the sealing cavity.

2. The high-speed motor oil seal according to claim 1, characterized in that, The oil-blocking ribs are provided in two rings, and the two rings of oil-blocking ribs are arranged parallel to each other along the axial direction of the sealing lip.

3. The high-speed motor oil seal according to claim 2, characterized in that, The sealing lip has a front end and a waist. The front end has a first annular surface protruding toward the outer periphery of the motor shaft. The waist is located between the base and the first annular surface of the front end of the lip. Two oil-blocking ribs are arranged parallel to each other on the end face of the waist.

4. The high-speed motor oil seal according to claim 3, characterized in that, The lip waist has a second annular surface, which tapers in diameter from the base toward the front end of the lip in the axial direction of the motor shaft.

5. The high-speed motor oil seal according to claim 3, characterized in that, The sealing part includes a dustproof lip, one end of which is integrally connected to the base. The side of the dustproof lip facing away from the base extends toward the motor shaft and abuts / is spaced apart from the outer periphery of the motor shaft. The dustproof lip is configured to prevent foreign objects from approaching the sealing lip.

6. The high-speed motor oil seal according to claim 5, characterized in that, The dustproof lip includes a dustproof end and a dustproof waist. The dustproof end has a third annular surface protruding toward the outer periphery of the motor shaft, and the dustproof waist is located between the base and the third annular surface of the dustproof end.

7. The high-speed motor oil seal according to claim 6, characterized in that, The dustproof waist section and the lip waist section are set at a preset angle.

8. The high-speed motor oil seal according to claim 4, characterized in that, The sealing lip has an inner circumferential surface and an outer circumferential surface, wherein: The outer peripheral surface of the inner side of the sealing lip is the second annular surface, and the inner peripheral surface of the inner side of the sealing lip is the fourth annular surface that faces inward and away from the outer peripheral surface of the inner side of the sealing lip. The fourth annular surface, near the motor shaft, contacts the second annular surface, near the motor shaft, to form the first annular surface.

9. The high-speed motor oil seal according to claim 8, characterized in that, The base is attached to the end of the reinforcing ring on the inner circumferential side facing the sealing lip side; The base has a base surface facing the side of the sealing lip in the axial direction of the motor shaft; The inner circumferential surface of the sealing lip is connected to the base surface of the base; The end of the inner circumferential surface of the sealing lip relative to the outer circumferential surface of the base is tapered toward the front end of the lip in the axial direction of the motor shaft.

10. The high-speed motor oil seal according to claim 8, characterized in that, The sealing lip has an annular recess on its outer peripheral side that accommodates a clamping spring and is recessed inward. The recess is positioned opposite to the front end of the lip, and the inner peripheral surface of the inner side of the sealing lip is connected to the recess.

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