High-strength engineering machinery hydraulic cylinder

Abstract

The invention discloses a high-strength engineering machinery hydraulic cylinder, which comprises a cylinder body. A piston rod and a guiding support ring are arranged in the cylinder body, a piston is arranged on the piston rod, and an oil inlet pipe interface and an oil return pipe interface are arranged on the cylinder body; the cylinder body is made of 27 SiMn alloy steel material, the pistonrod is made of SiCr-440 material, the surfaces of the cylinder body and the piston rod are quenched at intermediate frequency, and then the surface of the piston rod is plated with hard chromium and polished to Ra 0.08 mum; the piston consists of a floating buffer plunger piston and a floating buffer sleeve; the buffer plunger piston is limited by a steel ball; two lip-shaped seals are arranged onthe piston rod, and lubricant is filled between the two lip-shaped seals; two ends of the piston are provided with pollution-receiving rings of which thicknesses are 4 millimeters; and the guiding support ring is a DU composite material sliding bearing. The high-strength engineering machinery hydraulic cylinder solves the technical problem of short service life of the hydraulic cylinder in the prior art, can bear 30MPa high pressure when in use, and is an ideal engineering machinery hydraulic cylinder; and the surface of the hydraulic cylinder is not easy to be damaged.

Description

technical field [0001] The invention belongs to the technical field of hydraulic cylinders and relates to a hydraulic cylinder of high-strength engineering machinery. Background technique [0002] With the improvement of industrial automation level, my country's main engine equipment manufacturing main engine needs to be equipped with high-performance and reliable hydraulic products, and the supporting level determines the performance, level, quality and reliability of the main engine and major technical equipment. Therefore, hydraulic parts are an industry that provides basic support for the equipment manufacturing industry, and many products belong to the core technology in the field of major technical equipment. However, because many enterprises in my country's hydraulic industry are relatively backward in technology, core technology and management in the field of equipment, there is a large gap between the performance, quality and reliability of products and the internat...

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Problems solved by technology

[0005] The invention has reasonable structural design and convenient use, and solves the technical problem of short service life of the existing hydraulic cylinder. The hydraulic cylinder can withstand 30Mpa high pressure during use, reduces frictional resistance, is not easy to be strained on the surface, and has a long service life. It is an ideal construction machinery hydraulic cylinder

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