Cylinder bottom sealing structure

Abstract

The invention designs a cylinder bottom sealing structure of a hydraulic cylinder. To be specific, a QD Glyd-ring is added in front of an O-shaped ring of a cylinder bottom. Due to the fact that the QD Glyd-ring is added in front of the O-shaped ring, a buffering effect is played on the rear O-shaped ring through a high-pressure buffering property of the Glyd-ring, and the service life of a sealing part is prolonged. In addition, the manufacturing cost of the Glyd-ring is low, and the Glyd-ring is economical and practical. Compared with an existing product, the cylinder bottom sealing structure is convenient to use, simple in structure, low in cost and capable of improving the working stability of the hydraulic cylinder of the type, and the problems of oil leakage and the like due to poor sealing can be avoided.

Description

technical field

[0001] The invention relates to a hydraulic cylinder bottom sealing structure, in particular adding an OD gray ring in front of the O-ring at the bottom of the cylinder. Background technique

[0002] The static seal of the hydraulic cylinder plays a very critical role in the tightness of the oil cylinder. The general static seal is to place one or two O-rings on the bottom of the cylinder. The clearance requirements are relatively high, and it will be squeezed into the groove under high pulse pressure and be damaged, resulting in oil leakage or oil leakage, especially on mining dump trucks with a large tonnage. Bottom seepage ratio is higher. Contents of the invention

[0003] The purpose of the present invention is to make up for the above-mentioned shortcomings, and provide a cylinder bottom sealing structure without welding.

[0004] The technical solution of the present invention is: place an OD gray ring in front of the O-ring, and use the high-press...

Examples

Embodiment Construction

[0010] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0011] like figure 1 Shown, the present invention mainly is made up of including live 1 gray ring, 2O ring and 3 cylinder bottoms. The cylinder bottom (3) is installed in the cylinder barrel (4), the left end of the cylinder bottom is high-pressure oil, the gray ring (1) is installed on the side of the cylinder bottom close to the pressure oil, and the O-ring (2) is installed on the gray ring Later, when the pressure oil at the left end of the cylinder bottom hits the gray ring, a small amount of hydraulic oil will pass through the PTFE slip ring at the outer end of the gray ring and reach the O-ring. This part of the hydraulic oil will be blocked by the gray ring. A pressure drop acts as a buffer to protect the O-ring from damage.

technical field

[0001] The invention relates to a hydraulic cylinder bottom sealing structure, in particular adding an OD gray ring in front of the O-ring at the bottom of the cylinder. Background technique

[0002] The static seal of the hydraulic cylinder plays a very critical role in the tightness of the oil cylinder. The general static seal is to place one or two O-rings on the bottom of the cylinder. The clearance requirements are relatively high, and it will be squeezed into the groove under high pulse pressure and be damaged, resulting in oil leakage or oil leakage, especially on mining dump trucks with a large tonnage. Bottom seepage ratio is higher. Contents of the invention

[0003] The purpose of the present invention is to make up for the above-mentioned shortcomings, and provide a cylinder bottom sealing structure without welding.

[0004] The technical solution of the present invention is: place an OD gray ring in front of the O-ring, and use the high-press...

Examples

Embodiment Construction

[0010] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0011] like figure 1 Shown, the present invention mainly is made up of including live 1 gray ring, 2O ring and 3 cylinder bottoms. The cylinder bottom (3) is installed in the cylinder barrel (4), the left end of the cylinder bottom is high-pressure oil, the gray ring (1) is installed on the side of the cylinder bottom close to the pressure oil, and the O-ring (2) is installed on the gray ring Later, when the pressure oil at the left end of the cylinder bottom hits the gray ring, a small amount of hydraulic oil will pass through the PTFE slip ring at the outer end of the gray ring and reach the O-ring. This part of the hydraulic oil will be blocked by the gray ring. A pressure drop acts as a buffer to protect the O-ring from damage.

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