A bidirectional rotary high-speed oil seal

Abstract

This invention discloses a bidirectional rotary high-speed oil seal, comprising a lip with circumferentially arranged triangular grooves and micro-spiral grooves. The triangular grooves are located near the oil end of the lip, and a connecting groove is provided between the triangular grooves. The micro-spiral grooves are located at the far end of the lip. The advantages of this invention are: by employing the triangular groove and micro-spiral groove structure, it can operate without leakage for extended periods at 20,000 rpm, and without leakage after 0.5 hours of reverse rotation at 5,000 rpm, making it suitable for use in high-speed rotating motors.

Description

Technical Field

[0001] This invention relates to sealing components, specifically a bidirectional rotary high-speed oil seal. Background Technology

[0002] Under the trend of new energy development, the automotive industry has also begun to use electric energy on a large scale to replace traditional internal combustion engines. This is because the electric motor rotates at a higher speed than the traditional engine and has a short period of reverse rotation (lasting no more than 0.5 hours), which requires a new type of oil seal that can withstand higher speeds and adapt to reverse rotation. Summary of the Invention

[0003] The purpose of this invention is to provide a bidirectional rotary high-speed oil seal, which solves the problem that existing oil seals are not suitable for high-speed motor rotation.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A bidirectional rotary high-speed oil seal includes a lip, on which circumferentially arranged triangular grooves and micro-spiral grooves are provided. The triangular grooves are located at the oil-proximal end of the lip, and a connecting groove is provided between the triangular grooves. The micro-spiral grooves are located at the oil-distal end of the lip.

[0006] Furthermore, both the triangular groove and the micro-spiral groove are provided with at least one.

[0007] Furthermore, the triangular groove has one channel, and the micro-spiral groove has three channels.

[0008] Furthermore, the triangular groove is a triangular groove formed by strips.

[0009] Furthermore, the triangular groove is a triangular groove formed by a complete contour surface.

[0010] Furthermore, the triangular groove is an isosceles triangle, with the two base angles of the isosceles triangle serving as the oil inlet and outlet, and the base of the isosceles triangle arranged circumferentially.

[0011] Furthermore, it also includes a rubber body and a skeleton, with the rubber body located on the skeleton and having a lip on the rubber body.

[0012] Furthermore, the rubber body is fluororubber.

[0013] Furthermore, the skeleton is made of metal.

[0014] Furthermore, the frame includes a frame opening, an inner fold, a U-shaped portion, and an inner extension. The rubber body includes a wrapping portion and a lip. The axially arranged frame opening is connected to one end of the U-shaped portion through the inner fold, and the other end of the U-shaped portion is connected to the radially arranged inner extension. The wrapping portion is located on the outside of the inner fold, the outside of the U-shaped portion, the outside of the inner extension, and at the end. The lip forms an h-shape.

[0015] The beneficial effects of this invention are: by adopting a triangular groove and micro spiral groove structure, it can run without leakage for a long time at a speed of 20,000 rpm, and run without leakage for 0.5 hours at a reverse rotation speed of 5,000 rpm, making it suitable for use in high-speed rotating motors.

[0016] The aforementioned main solution of the present invention and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed by the present invention; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding the solution of the present invention, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected by the present invention, and will not be exhaustively listed here. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the triangular groove of the present invention.

[0018] Figure 2 This is a schematic diagram of the triangular groove leakage of the present invention.

[0019] Figure 3 This is a schematic diagram of the triangular groove structure of the present invention.

[0020] Figure 4 This is a schematic diagram of leakage through the triangular groove of the present invention.

[0021] Figure 5 This is a schematic diagram of the triangular groove structure of the present invention.

[0022] In the figure: 1-lip, 2-triangular groove, 3-micro-spiral groove, 4-triangular groove, 5-connecting groove, 6-rubber body, 7-skeleton. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0024] Example 1

[0025] refer to Figures 1-3 As shown, a bidirectional rotary high-speed oil seal includes a rubber body 6 and a skeleton 7, with the rubber body 6 fixedly mounted on the skeleton 7. The skeleton 7 is made of metal and mainly serves to support the oil seal, ensuring the overall structural stability. The rubber body 6 is made of a specially formulated high-temperature resistant, low-friction coefficient fluororubber. A portion of the rubber body 6 is bonded to the skeleton 7, while the other portion contacts the rotating shaft to achieve a compression seal.

[0026] Specifically, the frame 7 includes an integrally connected frame opening, an inner fold, a U-shaped portion, and an inner extension, while the rubber body 6 includes an integrally connected wrapping portion and a lip 1. The axially arranged frame opening is connected to one end of the U-shaped portion via the inner fold, and the other end of the U-shaped portion is connected to the radially arranged inner extension. The wrapping portion is located on the outside of the inner fold, the outside of the U-shaped portion, the outside of the inner extension, and at the end. The wrapping portion wraps around the inside of the inner extension and is connected to the lip 1. The lip 1 forms an h-shape, and a groove is provided on the inner side of the h-shape near the oil end.

[0027] The lip 1 is provided with circumferentially arranged triangular grooves and micro-spiral grooves 3. The triangular groove is a triangular groove 2 formed by strips, and there is one triangular groove. The triangular groove is located at the oil end near the lip 1, and there is a connecting groove 5 between the triangular grooves. There are three micro-spiral grooves 3, and the micro-spiral grooves 3 are located at the oil end far from the lip 1.

[0028] The triangular groove is an isosceles triangle, with the two base angles of the isosceles triangle serving as the oil inlet and outlet. The base of the isosceles triangle is arranged circumferentially.

[0029] The working process of this invention is as follows: by using a triangular groove, oil enters from one end of the triangular groove and flows out from the other end when it rotates at high speed. During this process, a small amount of oil will seep out from the top of the triangular groove. Therefore, a micro spiral groove is set at the upper end of the triangular groove to pump back the small amount of leaked oil.

[0030] When the shaft reverses, the triangular groove can also pump the oil back, but the micro-spiral groove will pump the slight leakage of oil towards the air side. Because the micro-spiral groove has a small pumping effect and the amount of oil leaking from the triangular groove to the vicinity of the micro-spiral groove in a short time is extremely small, short-term reverse rotation will not cause leakage. It can meet the requirement of reverse rotation speeds up to 5000 rpm and operate for 0.5 hours without leakage.

[0031] Example 2

[0032] refer to Figure 4 and Figure 5 As shown, a bidirectional rotary high-speed oil seal has a triangular groove 4 formed by a complete contour surface. The triangular groove is relatively simple to process, and oil enters the groove to form an oil film. Other structures are the same as in Example 1.

[0033] The foregoing basic examples and their further alternative examples of the present invention can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed by the present invention. In the present invention, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bidirectional rotary high-speed oil seal, comprising a lip (1), characterized in that: The lip (1) is provided with a circumferentially arranged triangular groove and a micro-spiral groove (3). The triangular groove is located at the oil end of the lip (1), and a connecting groove (5) is provided between the triangular grooves. The micro-spiral groove (3) is located at the oil end of the lip (1). The apex of the triangular groove faces the far oil end, and the base of the triangular groove faces the near oil end.

2. The bidirectional rotary high-speed oil seal according to claim 1, characterized in that: The triangular groove and the micro-spiral groove (3) are each provided with at least one.

3. The bidirectional rotary high-speed oil seal according to claim 2, characterized in that: The triangular groove has one channel, and the micro-spiral groove (3) has three channels.

4. The bidirectional rotary high-speed oil seal according to claim 1, characterized in that: The triangular groove is a triangular groove formed by strips (2).

5. The bidirectional rotary high-speed oil seal according to claim 1, characterized in that: The triangular groove is a triangular groove (4) formed by a complete contour surface.

6. The bidirectional rotary high-speed oil seal according to claim 1, 4 or 5, characterized in that: The triangular groove is an isosceles triangle, with the two base angles of the isosceles triangle serving as the oil inlet and outlet, and the base of the isosceles triangle arranged circumferentially.

7. The bidirectional rotary high-speed oil seal according to claim 1, characterized in that: It also includes a rubber body (6) and a skeleton (7), with the rubber body (6) located on the skeleton (7) and a lip (1) on the rubber body (6).

8. The bidirectional rotary high-speed oil seal according to claim 7, characterized in that: The rubber body (6) is fluororubber.

9. The bidirectional rotary high-speed oil seal according to claim 7 or 8, characterized in that: The skeleton (7) is made of metal.

10. The bidirectional rotary high-speed oil seal according to claim 7, characterized in that: The frame (7) includes a frame opening, an inner fold, a U-shaped part and an inner extension. The rubber body (6) includes a wrapping part and a lip (1). The axially arranged frame opening is connected to one end of the U-shaped part through the inner fold, and the other end of the U-shaped part is connected to the radially arranged inner extension. The wrapping part is located on the outside of the inner fold, the outside of the U-shaped part, the outside of the inner extension and the end. The lip (1) forms an h shape.

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