Electro-hydraulic pump control differential cylinder device

Abstract

The invention discloses an electric hydraulic pump control differential cylinder device. The electric hydraulic pump control differential cylinder device comprises a computer control system, and the computer control system is connected with a set of pressure sensors, a displacement sensor, an encoder and a signal input device. The encoder is connected with a motor, the motor is connected with a differential metering pump, the differential metering pump is connected with a pressurized oil tank through a pipe bundle, connected with the left end of a differential cylinder through a pipe bundle A, and connected with the right end of the differential cylinder through a pipe bundle B, and a push rod in the differential cylinder is connected with a load. The closed pump control differential cylinder device combining dynamic compensation control of a two-position three-way electromagnetic directional valve and oil replenishing of a common check valve is adopted as the novel electric hydraulic pump control differential cylinder device, the system can be effectively controlled, and an oil path and a control structure of the device are simple. According to the novel electric hydraulic pump control differential cylinder device based on the new flow distributing principle, control over motion symmetry of the differential cylinder can be achieved, and hot oil exchange of a closed type pump control system can be automatically achieved.

Description

technical field [0001] The invention relates to the field of electrostatic hydraulic technology, in particular to a novel electrohydraulic pump-controlled differential cylinder device. Background technique [0002] In the late 1970s, with the emergence of high-power rare-earth permanent magnet servo motor technology, it brought development opportunities to the integration of electrohydrostatic technology. Due to its remarkable energy-saving effect and many advantages, it has already become a research hotspot in various countries. The differential cylinder has It has the advantages of large output force, high efficiency and reliability of unilateral sliding seal, small footprint, simple manufacture, and low cost, so it has become the most widely used linear hydraulic actuator. However, due to the difference in the effective area of ​​the two chambers of a pair of relief valves and 6 differential cylinders, the flow of hydraulic oil at the inlet and outlet is asymmetrical, whi...

AI Technical Summary

Problems solved by technology

The former undoubtedly increases the cost of the system, while the latter complicates the oil circuit of the system due to the use of hydraulic control check valve compensation control, and is affected by load changes, which brings difficulties to its selection, otherwise it may make it work in a constant state. It cannot be opened or has been open, causing the system circuit to fail to release pressure in time or the oil pressure to be low

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