Buffer seal for hydraulic breaking hammer

Abstract

The invention discloses a buffer seal for a hydraulic breaking hammer, and belongs to the field of sealing elements. The buffer seal comprises a base body, an adjusting ring and a buffer ring. The base body, the adjusting ring and the buffer ring are coaxially arranged, the outer side face of the adjusting ring and the outer side face of the buffer ring are attached to the inner side face of the base body, the adjusting ring and the buffer ring are distributed up and down, the buffer ring is close to a high-pressure oil cavity, and the adjusting ring is far away from the high-pressure oil cavity; and a first inclined face and a second inclined face which are formed through inner chamfers are arranged in inner cavities in the two ends of the buffer ring respectively. The buffer seal for the hydraulic breaking hammer is good in lubricating performance and long in service life.

Description

technical field [0001] The invention relates to the technical field of seals, in particular to a buffer seal for a hydraulic breaker. Background technique [0002] The hydraulic breaker is referred to as "breaker" or "breaker", which is installed on excavators and loaders to break stones, rocks, etc., and is the main equipment for open-pit mining. Cushion seals are an important part of hydraulic breaker seals. The internal structure of the middle cylinder of the hydraulic breaker is hollow, and the interaction between the piston and the valve group in the middle cylinder makes the hydraulic breaker realize the striking operation. The front end of the middle cylinder body is respectively provided with a dust-proof seal groove, a main oil seal groove and a buffer ring groove, and their functions are to provide installation positions for the sealing ring. Buffer seals play a very important role in protecting hydraulic equipment. The impact energy of a large hydraulic breaker...

AI Technical Summary

Problems solved by technology

In addition, polyurethane is processed through a reactor during the synthesis process, and the control of temperature and pressure is prone to deviation, resulting in performance differences

On the other hand, when the α1 angle of the buffer seal needs post-cutting, because polyurethane is an elastomer, there will be a certain elastic deviation during cutting, and the control of the angle cannot be consistent with the drawing, resulting in the oil surface angle and air surface angle. There is a deviation in the coordination, which is prone to failure

In summary, the buffer seals used on hydraulic breakers at this stage have the following problems: (1) The substrate has poor pressure and high temperature resistance; (2) The substrate is easily deformed, resulting in stress and vibration generated by the piston during operation. Buffer ring B fails prematurely; (3) The cost of raw materials is high, and the performance index is unstable; (4) Cooperating with the piston, the wear resistance is poor; (5) The performance of compression permanent deformation is high; (6) There is a certain error in machinability , affecting the sealing effect

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