High sealing device of hydraulic cylinder for engineering

Abstract

The invention discloses a high sealing device of a hydraulic cylinder for engineering. The device comprises an elastic gasket body; the gasket body is provided with at least three positioning piece holes; positioning pieces are embedded in the positioning piece holes, are thinner than the gasket body, and are the same in thickness; anti-bonding layers are arranged on two side surfaces of the gasket body, and comprise base cloth; anti-bonding paint is coated on the base cloth; and the anti-bonding layers are connected with the gasket body through adhesive layers. The high sealing device of thehydraulic cylinder for engineering not only can guarantee the sealing effect, but also can guarantee the connecting size precision of two combined components, and can be repeatedly used by many times.

Description

technical field [0001] The invention relates to a hydraulic cylinder for engineering machinery, in particular to a sealing gasket used in hoisting machinery. Background technique [0002] The hydraulic cylinders used in construction machinery are inseparable from various hydraulic sealing gaskets to prevent the leakage of lubricating oil, transmission media and other gases and liquids. Most of the gaskets used here are made of elastic materials and rely on the complete transmission box The connecting bolts between the two parts of the body or the connecting bolts between the two parts of the joint surface of the pipeline and the container can make the sealing gasket elastically deform, thereby eliminating the processing defects and position deviation on the joint surface of related parts, and ensuring the joint surface of the two parts There will be no leakage between them. However, since the sealing gasket is an elastic body, on the one hand, when the two parts of the tran...

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Problems solved by technology

However, since the sealing gasket is an elastic body, on the one hand, when the two parts of the transmission box, pipeline or container are combined into one, the connection size between them becomes uncertain, and its size depends on the shrinkage of the connecting bolts. The tightening degree of the bolts is large, the elastic deformation of the sealing gasket will be large, and the connection size between the two parts of the transmission box will become smaller, and vice versa. Such uncertainty will affect the combination of transmission box, pipeline or container. The situation where there are dimensional positioning requirements between the two parts of the component brings problems, and the installation dimensional accuracy cannot be guaranteed; on the other hand, the gasket is squeezed and deformed for a long time during the working process, and the gap between the gasket and the contacting machine parts Adhesion occurs, causing the two parts of the transmission box, pipeline or container to be disassembled and repaired. The gasket will be torn during the disassembly process and cause damage. Therefore, the gasket can basically only be used once, causing equipment The cost of use is increased, and the gasket fragments bonded to the corresponding machine parts are also quite troublesome in the cleaning process, which will increase the time and cost of equipment maintenance

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