Floating guiding hydraulic cylinder

Abstract

The invention discloses a floating guide hydraulic cylinder comprising a piston rod, a front gland, a hydraulic control valve, an external oil path, a cylinder barrel, sealing rings and a guide ring, and the hydraulic cylinder is characterized in that a cylinder sleeve of the hydraulic cylinder consists of a left cylinder sleeve, a floating sleeve and a right cylinder sleeve, wherein the left cylinder sleeve is sleeved on an outer surface of a piston rod, the floating sleeve is arranged between the left cylinder sleeve and the right cylinder sleeve, the floating sleeve is connected with the left cylinder sleeve and the right cylinder sleeve by the sealing rings of the floating sleeve at two ends. Clearance between the floating sleeve and the piston rod is sealed to form pressure fall, the sealing member between the left cylinder sleeve and the piston rod is in a low pressure state, which can realize better sealing and can work efficiently in a long time. The clearance of the floating sleeve is adjusted properly so that the pressure fall can be controlled well; because of presence of the floating sleeve, demand of processing precision of a matching member is reduced, thereby having low cost and convenient popularization.

Description

Floating guide hydraulic cylinder technical field This technology is widely used in places where hydraulic cylinders for hydraulic drives, servo cylinders and similar actuators are used. Due to its general processing accuracy requirements and long service life, it is especially suitable for application in the metallurgical industry where the environment is harsh and replacement is inconvenient. Background technique Most of the guides commonly used in hydraulic cylinders and servo cylinders at home and abroad are sealing rings, but the sealing materials and processing and treatment methods are continuously improved to improve the service life, which can basically meet the use requirements. As the working pressure of the oil cylinder increases, the tightening force of the seal ring on the piston rod also increases. Under the condition of high-speed reciprocating motion, the guide of the seal ring will wear, generate heat, and even be damaged. Contents of the invention Th...

AI Technical Summary

Problems solved by technology

As the working pressure of the oil cylinder increases, the tightening force of the seal ring on the piston rod also increases. Under the condition of high-speed reciprocating motion, the guide of the seal ring will wear, generate heat, and even be damaged.

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