Easy-to-control single rod type piston cylinder based on equivalent acting surface

Abstract

The invention discloses an easy-to-control single rod type piston cylinder based on an equivalent acting surface. The easy-to-control single rod type piston cylinder comprises a cylinder cover, a cylinder head, a cylinder barrel, a cylinder bottom, a piston rod and a guide rod, wherein the cylinder cover and the cylinder head are arranged at one end of the cylinder barrel in sequence in a sealingmanner; the cylinder cover is located at the outer side of the cylinder head; the cylinder bottom is arranged at the other end of the cylinder barrel in the sealing manner; the piston rod comprises apiston head and a connection rod, which are connected; the piston head is located in the cylinder barrel; the connection penetrates out of the cylinder head and the cylinder cover; a cylindrical holeis formed in the middle of the piston head; one end of the guide rod is embedded into the cylindrical hole and the other end of the guide rod is in sealed connection with the cylinder bottom; the diameter of one end, which is embedded with the cylindrical hole, of the guide rod is equal to the diameter of the connection rod; an oil hole is formed in each of the cylinder head and the cylinder bottom. According to the easy-to-control single rod type piston cylinder based on the equivalent acting surface, two chambers of the piston cylinder have an equal effective acting area, so that the performance of a piston on positive and negative routes is consistent and the flow of an oil inlet and an oil outlet is symmetrical; the flow is symmetrical in two movement directions so that output and input properties of the single rod type piston cylinder are the same, and the hydraulic cylinder is easier to detect and control.

Description

technical field [0001] The invention relates to the technical field of piston cylinders, in particular to an easy-to-control single-rod piston cylinder based on an equivalent action surface. Background technique [0002] Single-rod piston cylinder is an important type of actuator, because of its compact structure and small working space, it is widely used in some specific electro-hydraulic servo systems. However, the effective area of ​​the left and right chambers of the existing single-rod piston cylinder is different. When the left and right chambers are connected with pressure oil at the same time, that is, when the differential connection is made, the piston will cause a sudden change in the pressure of the two chambers of the hydraulic cylinder when the direction is switched. Sudden changes in pressure will cause overpressure or cavitation, and the asymmetry of the flow in the two directions of motion will also cause inconsistencies in the displacement and speed of the ...

AI Technical Summary

Problems solved by technology

However, the effective area of ​​the left and right chambers of the existing single-rod piston cylinder is different. When the left and right chambers are connected with pressure oil at the same time, that is, when the differential connection is made, the piston will cause a sudden change in the pressure of the two chambers of the hydraulic cylinder when the direction is switched. Sudden changes in pressure will cause overpressure or cavitation, and the asymmetry of the flow in the two directions of motion will also cause inconsistencies in the displacement and speed of the piston rod. These problems make the operation of the hydraulic cylinder unstable.

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