Hydraulic power device with asymmetrical cylinder

Abstract

The invention provides a hydraulic power device with an asymmetrical cylinder. The hydraulic power device comprises a hydraulic cylinder, a fuel tank, a first bidirectional variable pump and a secondbidirectional variable pump, a motor and a first controller and a second controller, wherein a piston rod connected to a load is arranged in the hydraulic cylinder and a rodless cavity and a rod cavity are formed in the hydraulic cylinder; the first bidirectional variable pump and the second bidirectional variable pump communicate to the fuel tank, separately, the first bidirectional variable pumpcommunicates to the rodless cavity and the second bidirectional variable pump communicates to the rod cavity; the motor is used for providing an output torque, and the motor is coaxially connected tothe first variable pump and the second variable pump in series; and the first controller and the second controller are separately used for regulating the displacements of the first bidirectional variable pump and the second bidirectional variable pump correspondingly, and the first controller and the second controller regulate the displacements of the first bidirectional variable pump and the second bidirectional variable pump independently, so as to control the stretching or retracting speed of the piston rod.

Description

technical field [0001] The invention relates to the technical field of hydraulic control, in particular to an asymmetric cylinder hydraulic power device. Background technique [0002] In recent years, with the continuous development of pump control technology, people have higher and higher requirements for the control performance and energy-saving characteristics of the pump-controlled hydraulic control system. The traditional pump-controlled asymmetric cylinder hydraulic control system mostly adopts a closed system, but the area of ​​the two chambers of the hydraulic cylinder is different, resulting in an unbalanced flow between the two chambers of the hydraulic cylinder. In addition, during the working cycle, the oil in the closed system is circulated, which causes the system to generate a large amount of heat and affects the normal use of the system. [0003] The independent load port technology is mostly used in valve control systems, and two independent throttle ports ...

AI Technical Summary

Problems solved by technology

However, the research on the independent control technology of the load port is mainly concentrated in the valve control system, which limits its advantages in energy saving to a certain extent

In addition, the power system of the existing load port independent control technology does not match the load, and the energy transfer efficiency is low, which increases the power loss of the hydraulic system

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