Large-tonnage loader oil cylinder sealing system

Abstract

The invention discloses a large-tonnage loader oil cylinder sealing system which comprises a guide sleeve and a piston rod body used for installing the guide sleeve. A first sealing groove and a second sealing groove are sequentially formed in the inner side wall of the guide sleeve from left to right, and a dustproof sealing ring is connected to the inner side wall of the first sealing groove; the inner side wall of the second sealing groove is connected with a main sealing ring; the cross section of the main sealing ring is arranged into a Y shape; and the inner side wall of the dustproof sealing ring and the inner side wall of the main sealing ring make contact with the outer side wall of the piston rod body through arc-shaped end faces. According to the large hydraulic breaking hammer sealing system, through mutual cooperation of the dustproof sealing ring, the main sealing ring and a buffer sealing ring, the contact area between the dustproof sealing ring and the piston rod body and the contact area between the main sealing ring and the piston rod body are reduced, friction of the contact faces is reduced, a high-temperature-resistant polyurethane material is adopted as a main material, the influence of high temperature on a sealing system can be reduced, and the service life of the sealing system is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of oil cylinder sealing, in particular to a large tonnage loader oil cylinder sealing system. Background technique [0002] Loaders generally use diesel engines as the power source, drive mechanical mechanisms through hydraulic cylinders, and use buckets as working devices. They are mainly used for bulk cargo loading and unloading operations. Construction machinery, which can carry out bulldozing lifting and other material loading and unloading operations by changing to different auxiliary working devices, and is widely used. [0003] At present, during the working process of the loader, the frequent reversing of the oil cylinder causes high oil temperature, which can reach about 110°C. The existing sealing system, under high temperature conditions, the sealing performance is reduced, making the oil cylinder weak, and the seal is easy to crack in severe cases. Hydraulic oil leaks, especially buffer seals, w...

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Problems solved by technology

[0003] At present, during the working process of the loader, the frequent reversing of the oil cylinder causes high oil temperature, which can reach about 110°C. The existing sealing system, under high temperature conditions, the sealing performance is reduced, making the oil cylinder weak, and the seal is easy to crack in severe cases. Hydraulic oil leaks, especially buffer seals, which need to withstand extreme peak pressure and harsh working conditions under heavy loads. Extreme pressure causes seal extrusion cracking, and equipment cannot work normally. For this reason, we have designed large-tonnage loader oil cylinder seals system to solve the above problems

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