A combined oil and gas sealing device

Abstract

The invention provides a combined oil-gas seal device which can realize effective rotary oil-gas seal and is suitable for the situation that the installation demand can not be met only by friction force generated by interference magnitude in the case of smaller contact width for an oil-gas seal framework and a supporting body. The combined oil-gas seal is provided with the supporting body, oil-gas seals and O-rings, wherein each oil-gas seal comprises a gas seal, an oil seal and a framework, the supporting body is provided with an annular boss, and a 'closing-up' structure of the supporting body is adopted to prevent the oil-gas seals from being loosened from the supporting body under the action of air pressure; and the combined oil-gas seal is of a symmetrical structure, i.e., one oil-gas seal and one O-ring are respectively arranged at two sides of the combined oil-gas seal, the gas seals are oppositely arranged, and a gas flue capable of bearing high pressure gas is formed in the middle of the combined oil-gas seal. The oil-gas seal device provided by the invention has the advantages that the cumulated combination effect of the independent and standard oil seals and gas seals can be effectively achieved, the structure is simple, the volume is small, and the service life is long.

Description

technical field [0001] The invention belongs to the field of vehicle control components, and in particular relates to a combined oil-air seal device. Background technique [0002] The road surface of off-road vehicles is relatively complicated, and often needs to be driven on muddy and soft roads. According to the theory of vehicle ground mechanics, under the condition of certain ground friction coefficient and other conditions, the larger the ground contact area of ​​the tire, the greater the ground traction force obtained by the vehicle. big. Therefore, by adjusting the tire pressure and changing the tire contact area, it can play a role in changing the traction of the vehicle. Therefore, the passing performance of the vehicle is enhanced to varying degrees with the degree of reduction in tire pressure. [0003] How to realize the inflation and deflation of the tires during the driving process of the vehicle, and the air path connected from the stationary body to the rot...

AI Technical Summary

Problems solved by technology

However, when the contact width between the oil-gas seal skeleton and the support body is small, the friction generated by the interference alone cannot meet the installation requirements

However, due to the limitation of the strength and hardness of the skeleton, the interference cannot be enlarged blindly, and the increase of the interference will cause difficulty in installation, and at the same time, the deformation and damage of the oil and gas seal will also occur frequently.

And the combined oil-gas seal in the patent is that the gas seal and the frame of the gas seal are bonded together, and the oil seal and the frame of the oil seal are bonded together, and include a support ring. More components make the installation fit when the contact width of the frame of the oil-gas seal and the support body is small It is prone to problems, and the combined oil and gas seal needs to be symmetrically installed when it works in the wheel rim assembly. The installation of two combined oil and gas seals will increase the difficulty of assembly, and the two combined oil and gas seals need to be used together

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