Sealing structure of speed reducer

Abstract

The utility model relates to a sealing structure, in particular to a sealing structure of a speed reducer, which comprises the following components: a sealing mechanism which comprises a pipe frame, the outer wall of the pipe frame is rotatably connected with an annular housing, and the inner wall of the pipe frame is fixedly connected with a rotating shaft; the first annular groove is formed in the outer wall of the pipe frame; the ring frame is fixed on the outer wall of the ring shell, and the outer wall of the ring frame is fixedly connected with the machine shell; the oil feeding mechanism is fixed on the outer wall of the pipe frame and can prevent the sealing structure from being excessively extruded; the limiting mechanism is fixed to the outer wall of the ring shell and can reduce the abrasion degree of the sealing structure. According to the utility model, through the arrangement of the limiting mechanism, the static sealing element can be accurately limited at a specified position, so that the static sealing element is prevented from being excessively extruded and tightly attached to the dynamic sealing element due to excessive oil pressure, thereby preventing the dynamic sealing element and the static sealing element from being abraded and damaged due to excessive extrusion, and effectively preventing lubricating oil from leaking.

Description

Technical Field

[0001] This utility model relates to a sealing structure, specifically a sealing structure for a speed reducer. Background Technology

[0002] The performance of mechanical seals is crucial during the operation of speed reducers. Current common sealing structures are inadequate in handling changes in oil pressure. When oil pressure is abnormal, especially excessively high, static seals are easily over-compressed, leading to accelerated wear or even damage. This can also cause the seals to separate from the dynamic seals, resulting in lubricating oil leakage and affecting the normal operation of the speed reducer.

[0003] Meanwhile, existing technologies cannot effectively reduce wear between dynamic seals and static seals when dynamic seals are subjected to strong compression. Utility Model Content

[0004] The purpose of this invention is to provide a sealing structure for a speed reducer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sealing structure for a speed reducer includes:

[0007] A sealing mechanism includes a tube frame, wherein an annular shell is rotatably connected to the outer wall of the tube frame, and the inner wall of the tube frame is fixedly connected to a rotating shaft;

[0008] Annular groove one is formed on the outer wall of the pipe rack;

[0009] A ring frame is fixed to the outer wall of the ring shell, and the outer wall of the ring frame is fixedly connected to the machine housing;

[0010] The oil supply mechanism, fixed to the outer wall of the pipe rack, can prevent excessive compression of the sealing structure;

[0011] The limiting mechanism, fixed to the outer wall of the ring shell, can slow down the wear rate of the sealing structure.

[0012] Furthermore, the oil supply mechanism includes:

[0013] A dynamic seal is slidably inserted into the inner part of the annular groove.

[0014] Sealing ring one is snapped into the inside of ring groove one;

[0015] Sealing ring two is snapped into the inside of ring groove one.

[0016] Preferably, the oil supply mechanism includes:

[0017] Oil inlet chamber one is located on the outer wall of the pipe rack and communicates with the interior of annular groove one;

[0018] The second oil inlet chamber is located on the outer wall of the dynamic seal.

[0019] Preferably, the limiting mechanism includes:

[0020] A static seal is slidably inserted into the inside of the annular shell, and the outer wall of the static seal is provided with an annular groove II.

[0021] The spring is fixed between the outer wall of the static seal and the inner wall of the ring shell.

[0022] Preferably, the limiting mechanism includes:

[0023] The oil inlet chamber three has several chambers, which are opened at equal angles on the outer wall of the annular shell. A sealing block is slidably connected inside the oil inlet chamber three.

[0024] Several square grooves are provided, and they are equally spaced on the outer wall of the static seal.

[0025] Preferably, the limiting mechanism includes:

[0026] An annular groove three is formed at the bottom of the static seal, and a sealing ring three is engaged inside the annular groove three.

[0027] Preferably, the limiting mechanism includes:

[0028] An annular groove four is provided in a set and is formed on the inner wall of the annular shell. A sealing ring four is engaged inside the annular groove four.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] 1. Through the limiting mechanism, the static seal can be accurately limited to the designated position, avoiding excessive compression and tight contact with the dynamic seal due to excessive oil pressure. This prevents the dynamic and static seals from being worn and damaged due to excessive compression, and effectively prevents lubricating oil leakage.

[0031] 2. By incorporating an oil supply mechanism, when the static seal excessively compresses the dynamic seal, lubricating oil will flow between the dynamic and static seals, forming an oil film. This oil film effectively reduces the friction between the dynamic and static seals, preventing wear caused by excessive friction, protecting both seals, extending their service life, and ensuring the stable operation of the sealing system.

[0032] 3. By setting a sealing ring three at the bottom of the static seal near the extrusion surface, the lubricating oil penetration at the contact surface between the dynamic seal and the static seal can be effectively prevented. At the same time, a set of sealing ring four at the top of the static seal can effectively prevent the lubricating oil from penetrating through the gap between the static seal and the ring shell, thus avoiding the occurrence of lubricating oil leakage and effectively improving the sealing performance of the sealing mechanism. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0034] Figure 2 This is a schematic cross-sectional view of the oil supply mechanism in this utility model;

[0035] Figure 3 This is a schematic diagram of the limiting mechanism in this utility model;

[0036] Figure 4 This is a cross-sectional structural diagram of the limiting mechanism in this utility model.

[0037] In the diagram: 100, sealing mechanism; 110, pipe rack; 112, annular groove one; 120, ring shell; 121, ring frame; 200, oil supply mechanism; 210, dynamic seal; 212, oil inlet chamber one; 213, oil inlet chamber two; 220, sealing ring one; 221, sealing ring two; 300, limiting mechanism; 310, static seal; 311, annular groove two; 312, spring; 320, oil inlet chamber three; 321, sealing block; 322, square groove; 323, annular groove three; 324, sealing ring three; 330, annular groove four; 331, sealing ring four. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Please see Figure 1-4In this embodiment of the present invention, a sealing structure for a speed reducer includes: a sealing mechanism 100, which includes a tube frame 110, with an annular shell 120 rotatably connected to the outer wall of the tube frame 110; the inner wall of the tube frame 110 is fixedly connected to a rotating shaft; an annular groove 112 is formed on the outer wall of the tube frame 110; an annular frame 121 is fixed to the outer wall of the annular shell 120, and the outer wall of the annular frame 121 is fixedly connected to the housing; an oil supply mechanism 200 is fixed to the outer wall of the tube frame 110 and can prevent excessive compression of the sealing structure; and a limiting mechanism 300 is fixed to the outer wall of the annular shell 120 and can reduce the wear of the sealing structure. The positioning mechanism 300 includes: a static seal 310, which is slidably inserted into the inner wall of the ring shell 120, and the outer wall of the static seal 310 is provided with an annular groove 311; a spring 312, which is fixed between the outer wall of the static seal 310 and the inner wall of the ring shell 120; an oil inlet cavity 320, which is provided in several places and is opened at equal angles on the outer wall of the ring shell 120; a sealing block 321 is slidably connected inside the oil inlet cavity 320; and a square groove 322, which is provided in several places and is opened at equal angles on the outer wall of the static seal 310. Through the positioning mechanism 300, the static seal 310 can be accurately positioned at a specified position.

[0040] The oil supply mechanism 200 includes: a dynamic seal 210, which is slidably inserted into the annular groove 112; a sealing ring 220, which is fixed inside the annular groove 112; a sealing ring 221, which is fixed inside the annular groove 112; an oil inlet chamber 212, which is opened on the outer wall of the pipe rack 110 and communicates with the inside of the annular groove 112; and an oil inlet chamber 213, which is opened on the outer wall of the dynamic seal 210. By providing the oil supply mechanism 200, when the static seal 310 excessively compresses the dynamic seal 210, lubricating oil will flow between the dynamic seal 210 and the static seal 310 and generate an oil film.

[0041] The limiting mechanism 300 includes: a third annular groove 323, which is opened at the bottom of the static seal 310, and a third sealing ring 324 is engaged inside the third annular groove 323; a fourth annular groove 330, which is provided in a set and opened on the inner wall of the annular shell 120, and a fourth sealing ring 331 is engaged inside the fourth annular groove 330. By setting the third sealing ring 324 at the bottom of the static seal 310 near the extrusion surface, the lubricating oil at the contact surface between the dynamic seal 210 and the static seal 310 can be effectively prevented from penetrating.

[0042] Specifically, during operation, under normal circumstances, the lubricating oil is compressed by the oil pressure at the annular groove 311, and with the spring 312 rebounding, the static seal 310 adheres to the dynamic seal 210 to prevent lubricating oil leakage. If the oil pressure abnormally increases, the lubricating oil pressure rises accordingly. At this time, the lubricating oil will increase the pressure on the sealing blocks 321 along the oil inlet chamber 320, causing these sealing blocks 321 to deform and tightly adhere to the corresponding square grooves 322. This pressure is then transmitted to the outer wall of the static seal 310, limiting its movement. When the dynamic seal 210 is strongly compressed by the static seal 310, the dynamic seal 210 will move to one side, causing the sealing ring 220 and the sealing... When the sealing ring 221 deforms, the dynamic seal 210 and the pipe support 110 are respectively provided with oil inlet chamber 213 and oil inlet chamber 212. Under normal circumstances, oil inlet chamber 212 and oil inlet chamber 213 are staggered. However, when the dynamic seal 210 is displaced, oil inlet chamber 212 and oil inlet chamber 213 will overlap. At this time, the lubricating oil in the reducer will flow into the contact surface between the dynamic seal 210 and the static seal 310 along the overlapping oil inlet chamber 212 and oil inlet chamber 213. The lubricating oil forms a lubricating oil film between the two. This oil film can effectively reduce the friction between the dynamic seal 210 and the static seal 310 and avoid wear caused by excessive friction.

[0043] Example 1

[0044] like Figure 3-4 As shown, in this embodiment, the limiting mechanism 300 includes: a static seal 310, which is slidably inserted into the inside of the annular shell 120, and the outer wall of the static seal 310 is provided with an annular groove 311; a spring 312, which is fixed between the outer wall of the static seal 310 and the inner wall of the annular shell 120; an oil inlet cavity 320, which is provided in several ways and is opened at equal angles on the outer wall of the annular shell 120; a sealing block 321 is slidably connected inside the oil inlet cavity 320; and a square groove 322, which is provided in several ways and is opened at equal angles on the outer wall of the static seal 310.

[0045] In this embodiment, during the operation of the reducer, under normal circumstances, the lubricating oil will be squeezed at the annular groove 311 due to oil pressure, and with the spring 312 rebounding, the static seal 310 will stick to the dynamic seal 210 to prevent lubricating oil leakage. Once the oil pressure increases abnormally, the lubricating oil pressure will rise accordingly. At this time, the lubricating oil will increase the pressure on the sealing blocks 321 along the oil inlet chamber 320, causing these sealing blocks 321 to deform and stick tightly to the corresponding square groove 322, thereby transmitting the extrusion force to the outer wall of the static seal 310 and limiting the static seal 310. Through the limiting mechanism 300, the static seal 310 can be accurately limited to the designated position, avoiding excessive squeezing and sticking to the dynamic seal 210 due to excessive oil pressure, thereby preventing the dynamic seal 210 and the static seal 310 from being worn and damaged due to excessive squeezing, and effectively preventing lubricating oil leakage.

[0046] like Figure 2 As shown, in this embodiment, the oil supply mechanism 200 includes: a dynamic seal 210, which is slidably inserted into the inside of the first annular groove 112; a first sealing ring 220, which is fixed inside the first annular groove 112; a second sealing ring 221, which is fixed inside the first annular groove 112; an oil inlet chamber 212, which is opened on the outer wall of the pipe rack 110 and communicates with the inside of the first annular groove 112; and a second oil inlet chamber 213, which is opened on the outer wall of the dynamic seal 210.

[0047] In practice, when the dynamic seal 210 is strongly compressed by the static seal 310, the dynamic seal 210 will move to one side, causing the sealing ring 220 and the sealing ring 221 to deform. Since the dynamic seal 210 and the pipe support 110 are respectively provided with oil inlet chamber 213 and oil inlet chamber 212, and under normal circumstances, oil inlet chamber 212 and oil inlet chamber 213 are offset from each other, when the dynamic seal 210 shifts, oil inlet chamber 212 and oil inlet chamber 213 will overlap. At this time, the lubricating oil in the reducer will flow into the dynamic seal 310 along the overlapping oil inlet chambers 212 and 213. At the contact surface between the seal 210 and the static seal 310, lubricating oil forms a lubricating oil film between them. With the oil supply mechanism 200, when the static seal 310 excessively compresses the dynamic seal 210, the lubricating oil will flow to the area between the dynamic seal 210 and the static seal 310 and generate an oil film. This oil film can effectively reduce the friction between the dynamic seal 210 and the static seal 310, avoid wear caused by excessive friction, protect the dynamic seal 210 and the static seal 310, extend their service life, and ensure the stable operation of the sealing system.

[0048] Example 2

[0049] like Figure 4As shown, in this embodiment, the limiting mechanism 300 includes: an annular groove 323, which is opened at the bottom of the static seal 310, and a sealing ring 324 is engaged inside the annular groove 323; an annular groove 330, which is provided in a set and opened on the inner wall of the annular shell 120, and a sealing ring 331 is engaged inside the annular groove 330.

[0050] In specific implementation, by setting a sealing ring 324 at the bottom of the static seal 310 near the extrusion surface, the lubricating oil at the contact surface between the dynamic seal 210 and the static seal 310 can be effectively prevented from penetrating. At the same time, a set of sealing rings 331 is set at the top of the static seal 310, which can effectively prevent the lubricating oil from penetrating through the gap between the static seal 310 and the ring shell 120, thus avoiding the occurrence of lubricating oil leakage and effectively improving the sealing performance of the sealing mechanism 100.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sealing structure for a speed reducer, characterized in that, include: The sealing mechanism (100) includes a pipe frame (110), an annular shell (120) is rotatably connected to the outer wall of the pipe frame (110), and the inner wall of the pipe frame (110) is fixedly connected to the rotating shaft; Circular groove 1 (112) is formed on the outer wall of the pipe rack (110); The ring frame (121) is fixed to the outer wall of the ring shell (120), and the outer wall of the ring frame (121) is fixedly connected to the machine housing; The oil supply mechanism (200) is fixed on the outer wall of the pipe rack (110) and can prevent the sealing structure from being excessively squeezed; The limiting mechanism (300) is fixed on the outer wall of the ring shell (120) and can reduce the wear of the sealing structure.

2. The sealing structure of a speed reducer according to claim 1, characterized in that, The lubrication mechanism (200) includes: The dynamic seal (210) is slidably inserted into the annular groove (112); Sealing ring 1 (220) is snapped into the inside of ring groove 1 (112); Sealing ring two (221) is snapped into the inside of ring groove one (112).

3. The sealing structure of a speed reducer according to claim 2, characterized in that, The lubrication mechanism (200) includes: Oil inlet chamber 1 (212) is located on the outer wall of pipe rack (110) and communicates with the interior of annular groove 1 (112); The second oil inlet chamber (213) is located on the outer wall of the dynamic seal (210).

4. The sealing structure of a speed reducer according to claim 3, characterized in that, The limiting mechanism (300) includes: The static seal (310) is slidably inserted into the inside of the ring shell (120), and the outer wall of the static seal (310) is provided with an annular groove (311). Spring (312) is fixed between the outer wall of the static seal (310) and the inner wall of the ring shell (120).

5. The sealing structure of a speed reducer according to claim 4, characterized in that, The limiting mechanism (300) includes: The oil inlet chamber three (320) has several openings at equal angles on the outer wall of the annular shell (120), and a sealing block (321) is slidably connected inside the oil inlet chamber three (320). Several square grooves (322) are provided and are opened at equal angles on the outer wall of the static seal (310).

6. The sealing structure of a speed reducer according to claim 5, characterized in that, The limiting mechanism (300) includes: Annular groove three (323) is opened at the bottom of static seal (310), and sealing ring three (324) is snapped inside annular groove three (323).

7. The sealing structure of a speed reducer according to claim 6, characterized in that, The limiting mechanism (300) includes: An annular groove four (330) is provided in a set and is opened on the inner wall of the annular shell (120). A sealing ring four (331) is snapped inside the annular groove four (330).

Images