High-temperature-resistant hydraulic framework oil seal

Abstract

The utility model discloses a high-temperature-resistant hydraulic framework oil seal which comprises a sealing body, a reinforcing framework and an auxiliary framework are embedded into the outer side and the inner side of the interior of the sealing body respectively, the inner side of the reinforcing framework and the outer side of the auxiliary framework are jointly sleeved with multiple sets of reinforcing ribs, and gaps among the multiple sets of reinforcing ribs are filled with high-temperature-resistant filler. An annular groove is formed in the waist portion of the inner side of the sealing body, a self-tightening spiral spring matched with the annular groove is arranged in the annular groove in a sleeved mode, four limiting assemblies are arranged at the top of the inner side of the annular groove, and a dustproof lip is arranged at the bottom of the sealing body. Through the structural design of the reinforcing ribs and the high-temperature-resistant filling materials, the high-temperature-resistant performance of the framework type oil seal in the later period can be improved, meanwhile, the compression resistance of the framework type oil seal can be improved, the softening phenomenon of the oil seal caused by the influence of high temperature is reduced, the service life of the framework type oil seal can be prolonged, meanwhile, the oil seal can be prevented from being influenced by large pressure in the later period through improvement of the compression resistance, and the service life of the framework type oil seal is prolonged. And deformation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing devices, in particular to a high-temperature resistant hydraulic skeleton oil seal. Background Art

[0002] The skeleton-type oil seal is a typical representative of the seal of the rotating shaft of the mechanism. Through the reinforcement effect of its internal skeleton, it has excellent anti-deformation ability and tension, and can be used to isolate the parts of the transmission components that need lubrication from the external environment to prevent the leakage of lubricating oil. The skeleton-type oil seal in the related technology includes a sealing body, a reinforcing skeleton and a self-tightening coil spring. The sealing body is divided into a bottom, a waist, a cutting edge and a sealing lip according to different parts. The inner diameter of the skeleton-type oil seal in the free state is smaller than the shaft diameter, that is, it has a certain "interference amount", which can cooperate with the self-tightening coil spring to compensate for the self-tightening force of the oil seal at any time, thereby ensuring the sealing of the oil seal during operation.

[0003] The existing skeleton oil seals have a relatively simple internal structure, and most of them are not equipped with high-temperature resistant mechanisms. The oil seals will soften due to high temperatures during use, shortening their service life. In addition, when the skeleton oil seals are subjected to greater pressure or collision, the internal self-tightening coil springs will shift or fall off, thereby reducing the sealing efficiency of the oil seals in the later stage. Utility Model Content

[0004] The utility model aims to provide a high temperature resistant hydraulic skeleton oil seal, which is convenient for increasing the high temperature resistance of the skeleton oil seal and realizing the limiting operation of the internal self-tightening coil spring thereof.

[0005] In order to achieve the above-mentioned purpose, a high-temperature resistant hydraulic skeleton oil seal is provided, including a sealing body, wherein the outer side and the inner side of the sealing body are respectively embedded with a reinforcing skeleton and an auxiliary skeleton, the inner side of the reinforcing skeleton and the outer side of the auxiliary skeleton are jointly fitted with multiple groups of reinforcing ribs, and the gaps between the multiple groups of reinforcing ribs are filled with high-temperature resistant fillers, an annular groove is opened at the waist of the inner side of the sealing body, a self-tightening coil spring cooperating with the annular groove is fitted inside the annular groove, four groups of limiting components are arranged on the top of the inner side of the annular groove, and a dustproof lip is arranged at the bottom of the sealing body, so as to realize the high-temperature resistance of the oil seal and the limiting function of the self-tightening coil spring.

[0006] According to the high-temperature resistant hydraulic skeleton oil seal, the limit assembly includes an arc-shaped limit plate, a connecting spring and a receiving groove. The receiving grooves are provided with four groups. The four groups of receiving grooves are located at the inner top of the annular groove. One side of the inside of the four groups of receiving grooves is fitted with an arc-shaped limit plate extending to the outside and cooperating with the self-tightening coil spring. The side of the inside of the four groups of receiving grooves away from the arc-shaped limit plate is provided with a connecting spring interconnected with the self-tightening coil spring, so as to facilitate the limitation of the self-tightening coil spring to prevent it from falling off or deflecting in the later stage.

[0007] According to the high temperature resistant hydraulic skeleton oil seal, multiple groups of annular grooves are provided on the inner side of the reinforcing skeleton and the outer side of the auxiliary skeleton, and the multiple groups of annular grooves cooperate with the reinforcing ribs to facilitate the uniform engagement and limiting operation of the reinforcing ribs.

[0008] According to the high temperature resistant hydraulic skeleton oil seal, the high temperature resistant filler is made of liquid crystal high molecular polymer material, which is convenient for achieving high temperature resistance.

[0009] According to the high temperature resistant hydraulic skeleton oil seal, the exterior of the connecting spring is sprayed with an anti-rust coating to prevent the connecting spring from rusting and affecting the subsequent use effect.

[0010] The above scheme has the beneficial effects: through the structural design of the reinforcing ribs and the high temperature resistant filler, the high temperature resistance of the skeleton oil seal in the later stage can be improved while its compressive resistance can be increased, and the softening phenomenon of the oil seal caused by the high temperature can be reduced, so as to extend its service life. At the same time, the improvement of the compressive resistance can prevent the oil seal from being affected by a large pressure in the later stage and reduce the deformation.

[0011] Finally, through the cooperation of the receiving groove, the connecting spring and the arc-shaped limiting plate, the limiting work of the self-tightening coil spring can be realized, which effectively prevents the self-tightening coil spring from deflecting or falling off in the later stage, so as to improve the sealing performance of the skeleton oil seal.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0014] Figure 1 This is a three-dimensional structural diagram of a high-temperature resistant hydraulic skeleton oil seal of the utility model;

[0015] Figure 2 This is a front sectional view of a high temperature resistant hydraulic skeleton oil seal of the utility model;

[0016] Figure 3 This is a front view of a high temperature resistant hydraulic skeleton oil seal of the utility model;

[0017] Figure 4 This utility model is a high temperature resistant hydraulic skeleton oil seal Figure 2 A magnified view of the structure at A.

[0018] Legend:

[0019] 1. Sealing body; 2. Reinforced frame; 3. Reinforced ribs; 4. Dust lip; 5. High temperature resistant filler; 6. Arc-shaped limit plate; 7. Connecting spring; 8. Storage groove; 9. Annular groove; 10. Self-tightening coil spring; 11. Auxiliary frame. DETAILED DESCRIPTION

[0020] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0021] Reference Figure 1-4 The utility model embodiment is a high-temperature resistant hydraulic skeleton oil seal, which includes a sealing body 1, the outer side and the inner side of the sealing body 1 are respectively embedded with a reinforcing skeleton 2 and an auxiliary skeleton 11, the inner side of the reinforcing skeleton 2 and the outer side of the auxiliary skeleton 11 are jointly fitted with multiple groups of reinforcing ribs 3, and the gaps between the multiple groups of reinforcing ribs 3 are filled with high-temperature resistant fillers 5, an annular groove 9 is opened at the waist of the inner side of the sealing body 1, and a self-tightening coil spring 10 that cooperates with it is fitted inside the annular groove 9, four groups of limit assemblies are provided at the top of the inner side of the annular groove 9, and a dustproof lip 4 is provided at the bottom of the sealing body 1.

[0022] The limiting assembly includes an arc-shaped limiting plate 6, a connecting spring 7 and a receiving groove 8. There are four groups of receiving grooves 8, and the four groups of receiving grooves 8 are located at the inner top of the annular groove 9. One side of the inside of the four groups of receiving grooves 8 is fitted with an arc-shaped limiting plate 6 extending to the outside and cooperating with the self-tightening coil spring 10. The side of the inside of the four groups of receiving grooves 8 away from the arc-shaped limiting plate 6 is provided with a connecting spring 7 interconnected with it.

[0023] A plurality of annular grooves are provided on the inner side of the reinforcing frame 2 and the outer side of the auxiliary frame 11 , and the plurality of annular grooves cooperate with the reinforcing ribs 3 .

[0024] The high temperature resistant filler 5 is made of liquid crystal polymer material.

[0025] The exterior of the connecting spring 7 is sprayed with an anti-rust coating.

[0026] Working principle: By reinforcing the ribs 3 added near the inner side of the skeleton 2 and the auxiliary skeleton 11, the compressive performance inside the skeleton oil seal can be further improved and the deformation phenomenon can be reduced. Finally, by filling the high temperature resistant filler 5, the high temperature resistance performance in the later stage can be effectively improved and the softening phenomenon caused by the oil seal under the influence of high temperature can be reduced;

[0027] When installing the self-tightening coil spring 10, the arc-shaped limit plate 6 can be pushed to move inside the storage groove 8 to compress the connecting spring 7, and then the self-tightening coil spring 10 can be fitted into the inside of the annular groove 9. Then the arc-shaped limit plate 6 is loosened and the elastic restoring force of the connecting spring 7 is used to realize the restoration operation of the arc-shaped limit plate 6. At this time, the arc-shaped limit plate 6 can be used to block and limit the self-tightening coil spring 10 to prevent displacement or falling off in the later stage, thereby improving the sealing performance.

[0028] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A high temperature resistant hydraulic skeleton oil seal, comprising: A sealing body (1), characterized in that a reinforcing frame (2) and an auxiliary frame (11) are respectively embedded in the outer side and the inner side of the sealing body (1), the inner side of the reinforcing frame (2) and the outer side of the auxiliary frame (11) are jointly fitted with a plurality of reinforcing ribs (3), and the gaps between the plurality of reinforcing ribs (3) are filled with high-temperature resistant fillers (5), an annular groove (9) is provided at the waist of the inner side of the sealing body (1), a self-tightening coil spring (10) cooperating therewith is fitted inside the annular groove (9), four sets of limit assemblies are provided at the top of the inner side of the annular groove (9), and a dustproof lip (4) is provided at the bottom of the sealing body (1).

2. A high temperature resistant hydraulic skeleton oil seal according to claim 1, characterized in that: The limiting assembly comprises an arc-shaped limiting plate (6), a connecting spring (7) and a receiving groove (8). The receiving groove (8) is provided with four groups. The four groups of receiving grooves (8) are located at the inner top of the annular groove (9). One side of the inside of the four groups of receiving grooves (8) is fitted with an arc-shaped limiting plate (6) extending to the outside and cooperating with the self-tightening coil spring (10). The side of the inside of the four groups of receiving grooves (8) away from the arc-shaped limiting plate (6) is provided with a connecting spring (7) interconnected with the arc-shaped limiting plate (6).

3. A high temperature resistant hydraulic skeleton oil seal according to claim 1, characterized in that: The inner side of the reinforcing frame (2) and the outer side of the auxiliary frame (11) are both provided with a plurality of groups of annular grooves, and the plurality of groups of annular grooves cooperate with the reinforcing ribs (3).

4. A high temperature resistant hydraulic skeleton oil seal according to claim 1, characterized in that: The high temperature resistant filler (5) is made of liquid crystal high molecular polymer material.

5. A high temperature resistant hydraulic skeleton oil seal according to claim 2, characterized in that: The exterior of the connecting spring (7) is sprayed with an anti-rust coating.

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