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A high pressure oil seal assembly

An oil seal and high pressure technology, which is applied in the direction of engine components, engine seals, mechanical equipment, etc., can solve the problems of accelerated oil seal, contact stress and contact width increase, oil seal leakage, etc., to reduce the seal contact area and improve eccentricity tracking performance, and the effect of improving the pressure-bearing capacity

Active Publication Date: 2018-01-23
广州国机密封科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the oil seal at the hydraulic motor is directly subjected to high medium pressure. The normal pressure is required to be 10-20Mpa, and the maximum pressure must reach 30Mpa. Under high medium pressure, the contact stress and contact width between the sealing lip and the rotating shaft in the contact area will increase. increase, making heat dissipation difficult and accelerating oil seal failure
In order to enhance the pressure-bearing capacity of the oil seal, the design of the existing high-pressure oil seal usually adopts methods such as increasing the waist thickness and reducing the waist height, but these designs usually increase the pressure-bearing capacity at the cost of sacrificing the followability of the oil seal. When the beating is large, insufficient followability will not ensure that the sealing lip is effectively hugged on the shaft surface, resulting in partial leakage of the oil seal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see figure 1 and figure 2 , the high-pressure oil seal assembly of this embodiment includes a skeleton 2 and a sealing body 1, wherein the sealing body 1 is made of rubber, and the sealing body 1 includes a base body 1-1, a lip crown 1-3 and a connecting base body 1-1 And the waist 1-2 of the lip crown 1-3, the sealing body 1 is wrapped outside the skeleton 2. The thickness of the lip crown 1-3 is greater than the thickness of the waist 1-2, and the thickness of the lip crown 1-3 is about 4 times the thickness of the waist 1-2, so that the lip crown 1-3 has sufficient pressure bearing capacity and Eccentric followership. The contact area between the sealing body 1 and the frame 2 is composed of a bonding area 3 bonded to each other and a separation area 4 separated from each other, wherein the bonding area 3 is located in the contact area between the frame 2 and the base body 1-1 , the separation zone 4 is located in the contact area between the backbone 2 and the w...

Embodiment 2

[0032] see image 3 , the difference between this embodiment and embodiment 1 is that in the skeleton 2, the part corresponding to the bonding area 3 and the part corresponding to the separation area 4 are combined structures, which are respectively the bonding part skeleton 2-1 and separate the partial skeleton 2-2. In this way, when bonding the skeleton 2 and the sealing body 1, only the bonding part skeleton 2-1 and the sealing body 1 need to be bonded, and then the separating part skeleton 2-2 is installed. The separation part skeleton 2-2 is in the shape of a ring, and the ring-shaped separation part skeleton 2-2 is embedded in the circular inner hole of the bonding part skeleton 2-1.

[0033] Embodiments other than the above in this embodiment are the same as in Embodiment 1.

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PUM

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Abstract

The invention discloses a high-pressure oil seal assembly which comprises a framework and a seal body. The seal body comprises a base body, a lip crown and a waist portion connecting the base body and the lip crown. The seal body wraps the framework; the thickness of the lip crown is larger than the thickness of the waist portion; and the contact area of the seal body and the framework is formed by a bonding area for mutually bonding and a separation area for mutually separating, wherein the bonding area is arranged in the contact area between the framework and the base body, and the separation area is arranged in the contact area between the framework and the waist portion as well as the lip crown. The oil seal assembly can improve oil seal pressure endurance capability without influencing following performance of the oil seal, and solves the technical problem that in the prior art, the pressure endurance capability is improved at the price of reducing following performance or the following performance is improved at the price of reducing the pressure endurance capability.

Description

technical field [0001] The invention relates to an oil seal structure, in particular to an oil seal assembly for high pressure. Background technique [0002] With the continuous development of science and technology, all kinds of mechanical equipment are developing towards high pressure and high speed, and seals, as one of the key components of mechanical equipment, have become an urgent need for the development of equipment manufacturing to improve their performance under high pressure and high speed. . For example, the oil seal at the hydraulic motor is directly subjected to high medium pressure. The normal pressure is required to be 10-20Mpa, and the maximum pressure must reach 30Mpa. Under high medium pressure, the contact stress and contact width between the sealing lip and the rotating shaft in the contact area will increase. The increase makes it difficult to dissipate the heat and accelerate the failure of the oil seal. In order to enhance the pressure-bearing capa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/3248F16J15/324
CPCF16J15/3204
Inventor 黄乐谭锋向宇
Owner 广州国机密封科技有限公司