Pulse type high-pressure rotating oil seal

Abstract

The utility model provides an impulse type high-pressure rotating oil seal which comprises a cavity and an oil seal body, the oil seal body is installed on the inner side of the cavity in a limiting mode, an installation shaft is arranged on the inner side of the oil seal body, a metal framework is arranged on the inner side of the oil seal body, and an oil seal outer diameter is arranged on the outer side of the cavity. The outer diameter of the oil seal installed on the outer side of the oil seal body is attached to the inner wall of the cavity, the situation of leakage can be effectively prevented in the connecting process of the installation shaft and the cavity, the structural strength and the stabilizing effect can be provided through the metal framework, the positioning stability of the oil seal is enhanced through embedding of the tightening spring, and the service life of the oil seal is prolonged. And the dynamic sealing effect can be provided to a certain extent, so that the oil seal can keep good sealing performance under various movement conditions, the structure is simple, production is convenient, different materials are combined for use, and compared with a framework combined structure, the effect is more stable, and the manufacturing cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic plug technology, and in particular to a pulse-type high-pressure rotary oil seal, belonging to the field of oil seal technology. Background Technology

[0002] To prevent oil leakage, an oil seal is installed on the part of the shaft extending out of the engine body. The commonly used method is to install one oil seal, which is mostly made of elastomer. The oil seal installed at the front of the engine is called the front oil seal, and the oil seal installed at the rear of the engine or the output end is called the rear oil seal. The oil seals currently used by engine manufacturers are shown in the national standard GB / T13871-2007. The oil seal is installed in the oil seal seat hole. When the shaft is working, the oil leaks from the bearing shell and crankshaft clearance in the bearing housing. It is thrown out by the rotating shaft and gears and splashes onto the oil surface of the oil seal sealing lip for lubrication, and then flows back to the oil pan. The air side of the lip works under the protection of a second lip.

[0003] Hydraulic piston pumps generate internal high pressure during operation, and high and low pressures appear alternately in pulses. Existing high-pressure oil seals can shorten the lip and reduce the interference fit, resulting in a lack of compensation capability. Existing high-pressure oil seals are difficult to withstand high pressure, especially when pulse high pressure peaks occur, which can easily lead to oil leakage. At the same time, the structure is complex, the production process is cumbersome, and the manufacturing level is high. According to our current domestic manufacturing technology, it is difficult to achieve mass production, and the cost is high.

[0004] Therefore, a pulse-type high-pressure rotary oil seal is proposed. Utility Model Content

[0005] In view of this, the present invention provides a pulse-type high-pressure rotary oil seal to solve or alleviate the technical problems existing in the prior art, and at least provides a beneficial alternative.

[0006] The technical solution of this utility model is a pulse-type high-pressure rotary oil seal, comprising: a cavity and an oil seal body. The oil seal body is installed on the inner side of the cavity, an installation shaft is provided on the inner side of the oil seal body, a metal skeleton is provided on the inner side of the oil seal body, an oil seal outer diameter is provided on the outer side of the cavity, the outer side of the oil seal outer diameter is in contact with the inner wall of the cavity, and a nylon support ring is provided on the inner side of the oil seal body.

[0007] More preferably, a baffle is fixedly installed on the outer side of the mounting shaft, and the bottom of the baffle is in contact with the top of the cavity.

[0008] More preferably, the metal skeleton is made of an L-shaped metal material.

[0009] More preferably, the oil seal body is provided with a clamping spring, and the inner side of the cavity is provided with a spring retaining lip corresponding to the clamping spring.

[0010] More preferably, the top of the cavity is provided with a dustproof lip, which fits into the bottom of the baffle.

[0011] More preferably, the oil seal body has an internal lip waist, and the inner side of the lip waist has a positioning groove.

[0012] The present invention has the following advantages due to the adoption of the above technical solution:

[0013] This invention, by having the outer diameter of the oil seal installed on the outside of the oil seal body fit snugly against the inner wall of the cavity, effectively prevents leakage during the connection between the mounting shaft and the cavity. The metal skeleton provides structural strength and stability, while the nylon support ring provides support when the rubber lip is under pressure and cannot withstand it. The embedded clamping spring not only enhances the positioning stability of the oil seal but also provides a certain degree of dynamic sealing, enabling the oil seal to maintain good sealing performance under various motion conditions. The structure is simple and easy to manufacture. By using different material combinations, the effect is more stable and the manufacturing cost is lower compared to skeleton combination structures.

[0014] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural diagram showing the connection between the cavity and the mounting shaft of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the oil seal body of this utility model;

[0018] Figure 3 This is a front view of the structure of this utility model;

[0019] Figure 4 This is a structural diagram of the spring retaining lip of this utility model.

[0020] Reference numerals: 1. Cavity; 101. Mounting shaft; 102. Baffle; 2. Oil seal body; 201. Metal frame; 202. Hoop spring; 203. Spring retaining lip; 204. Oil seal outer diameter; 205. Dustproof lip; 206. Positioning groove; 207. Lip waist; 208. Nylon support ring. Detailed Implementation

[0021] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0022] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] like Figures 1-4 As shown, this utility model embodiment provides a pulse-type high-pressure rotary oil seal, including: a cavity 1 and an oil seal body 2. The oil seal body 2 is installed on the inner side of the cavity 1 for limiting. An installation shaft 101 is provided on the inner side of the oil seal body 2. A metal skeleton 201 is provided on the inner side of the oil seal body 2. An oil seal outer diameter 204 is provided on the outer side of the cavity 1. The outer side of the oil seal outer diameter 204 is in contact with the inner wall of the cavity 1. A nylon support ring 208 is provided on the inner side of the oil seal body 2. A baffle 102 is fixedly installed on the outer side of the installation shaft 101. The bottom of the baffle 102 is in contact with the top of the cavity 1.

[0024] The outer diameter 204 of the oil seal installed on the outside of the oil seal body 2 fits against the inner wall of the cavity 1, which can effectively prevent leakage during the connection between the mounting shaft 101 and the cavity 1. The metal skeleton 201 can provide structural strength and stability. The embedded clamping spring 202 not only enhances the positioning stability of the oil seal, but may also provide a dynamic sealing effect to a certain extent. The nylon support ring 208 can provide support when the rubber lip is under pressure and cannot withstand the pressure.

[0025] Reference Figure 2 The metal frame 201 is made of L-shaped metal material, and the oil seal body 2 is provided with a clamping spring 202. The inner side of the cavity 1 is provided with a spring retaining lip 203 corresponding to the clamping spring 202.

[0026] Oil seals can maintain good sealing performance under various motion conditions. They have a simple structure and are easy to manufacture. By using different material combinations, the effect is more stable and the production cost is lower compared to the skeleton combination structure.

[0027] Reference Figure 2The top of the cavity 1 is provided with a dustproof lip 205, which fits into the bottom of the baffle 102. The inside of the oil seal body 2 is provided with a lip waist 207, and the inner side of the lip waist 207 is provided with a positioning groove 206.

[0028] The dustproof lip 205 prevents external dust from entering, while having sufficient toughness to accommodate the slight movements of moving parts and fit snugly against the baffle 102.

[0029] In operation, this invention features an oil seal with an outer diameter 204 mounted on the outer side of the oil seal body 2 that fits against the inner wall of the cavity 1, effectively preventing leakage during the connection between the mounting shaft 101 and the cavity 1. The metal skeleton 201 provides structural strength and stability. The embedded clamping spring 202 not only enhances the positioning stability of the oil seal but also provides a certain degree of dynamic sealing. This allows the oil seal to maintain good sealing performance under various motion conditions. The structure is simple and easy to manufacture. By using different material combinations, the effect is more stable and the manufacturing cost is lower compared to the skeleton combination structure.

[0030] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A pulse-type high-pressure rotary oil seal, characterized in that: The device includes a cavity (1) and an oil seal body (2). The oil seal body (2) is installed on the inner side of the cavity (1). An installation shaft (101) is provided on the inner side of the oil seal body (2). A metal skeleton (201) is provided on the inner side of the oil seal body (2). An oil seal outer diameter (204) is provided on the outer side of the cavity (1). The outer side of the oil seal outer diameter (204) fits against the inner wall of the cavity (1). A nylon support ring (208) is provided on the inner side of the oil seal body (2).

2. The pulse-type high-pressure rotary oil seal according to claim 1, characterized in that: A baffle (102) is fixedly installed on the outside of the mounting shaft (101), and the bottom of the baffle (102) is in contact with the top of the cavity (1).

3. The pulse-type high-pressure rotary oil seal according to claim 1, characterized in that: The metal skeleton (201) is made of L-shaped metal material.

4. The pulse-type high-pressure rotary oil seal according to claim 1, characterized in that: The oil seal body (2) is provided with a clamping spring (202), and the inner side of the cavity (1) is provided with a spring retaining lip (203) corresponding to the clamping spring (202).

5. A pulse-type high-pressure rotary oil seal according to claim 1, characterized in that: The top of the cavity (1) is provided with a dustproof lip (205), which fits into the bottom of the baffle (102).

6. A pulse-type high-pressure rotary oil seal according to claim 1, characterized in that: The oil seal body (2) has a lip waist (207) inside, and a positioning groove (206) is provided on the inner side of the lip waist (207).

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