Continuous transformation large-transformation-range hydraulic transformer for high speed valve-controlled hydraulic cylinder

Abstract

The invention provides a continuous transformation large-transformation-range hydraulic transformer for a high speed valve-controlled hydraulic cylinder. The transformer comprises a hydraulic oil cylinder; mass blocks are arranged at two ends of a piston rod of the hydraulic oil cylinder; the piston rod and the mass blocks constitute a mass block piston rod; and stroke switches are respectively arranged at stroke ends on the left and the right of the mass block piston rod. Through the combination of a one-way valve and a high-speed switch valve, flow direction of oil liquid is controlled, andwith the addition of an energy accumulator, continuous flow borne by flow direction of the one-way valve is realized. The integral structure is laterally symmetrical; the pressurization process and the depressurization process are functionally theoretically symmetrical; forward pressurization and reverse pressurization in the pressurization process are functionally theoretically symmetrical; and forward depressurization and reverse depressurization in the depressurization process are functionally theoretically symmetrical. Through the mutual conversion of hydraulic energy and kinetic energy ofthe mass block piston rod, continuous stepless transformation can be realized on the premise that the structure of a hydraulic cylinder is unchanged; a required hydraulic transformation ratio can beobtained through adjusting the duty ratio of a PWM signal; and the control is convenient, the structure is simple, and zero vibration or noise is realized.

Description

technical field [0001] The invention relates to the field of hydraulic transmission and control, in particular to the field of hydraulic engineering machinery, in particular to a hydraulic transformer with continuous variable pressure, large variable voltage range, and high-speed switching valve-controlled hydraulic cylinder. Background technique [0002] The pressurized hydraulic cylinder is a commonly used hydraulic component in the existing hydraulic technology. The pressurized hydraulic cylinder can achieve the effect of pressurization or decompression by utilizing the difference in the cross-sectional area of ​​the piston or plunger in the two cylinders connected in series on the same axis. The disadvantage of the supercharged hydraulic cylinder's own structure is that its piston area ratio is fixed, that is, its transformation ratio remains unchanged, so that it cannot achieve continuous stepless pressure transformation effect, resulting in serious restrictions on its a...

AI Technical Summary

Problems solved by technology

The disadvantage of the supercharged hydraulic cylinder's own structure is that its piston area ratio is fixed, that is, its transformation ratio does not change, so it cannot achieve continuous stepless pressure transformation effect, resulting in serious restrictions on its application

However, it has many defects: the variable voltage range is small; since the structure of the new hydraulic transformer is modified according to the hydraulic pump, it has a large volume and low efficiency; there are rotating parts, which cause large noise and vibration; the new hydraulic transformer is a nonlinear system , it is difficult to achieve precise control; the load pressure corresponds to the load flow, and the flow control under a fixed load pressure cannot be realized. This defect is determined by its structure.

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