Pump control type electrohydraulic actuator

Abstract

The invention relates to a pump-control electro-hydraulic actuator, which comprises a position controller which is connected with a position sensor, the position sensor is connected with an expose head cylinder, two cavities of the expose head cylinder are respectively connected with the two ends of a hydraulic lock through a pipeline, the two ends of the hydraulic lock are connected with a two-way pump, a left relief valve, a right relief valve and a single valve, the other end of the check valves is connected and is connected with a fuel filter which is arranged in the oil box, the left relief valve and the right relief valve are connected with the oil box through the pipeline, an air filter and a liquid level thermometer are respectively arranged on the top portion and the side surface of the oil box, a distal control room is connected with a motor control unit through a wire, the two-way pump is connected with a motor, and the motor is connected with the motor control unit. The pump-control electro-hydraulic actuator leads the control room to adjust the motor control unit and adjust the rotating speed of the motor through a signal which is feedback to the position controller by a signal sensor, thereby adjusting the rotating speed of the two-way pump, achieving the changing of the two cavities of a hydro cylinder, and achieving the purpose of adjusting position. The pump-control electro-hydraulic actuator has low energy consumption, small volume, low cost and excellent control effect.

Description

technical field [0001] The invention relates to a two-way pump-controlled electro-hydraulic actuator, in particular to a pump-controlled electro-hydraulic actuator which realizes position control through hydraulic pump control, and belongs to the technical field of electro-hydraulic control. Background technique [0002] Valve control is widely used in the industrial field. With the vigorous advocacy of the conservation-oriented society, each system in the industrial field is reduced in volume, cost, and energy consumption as much as possible. [0003] There are two types of electro-hydraulic control systems: volume control and throttling control. The traditional view is that throttling control technology is used in small and medium power systems that require high dynamic response, while volume control technology is used in high power systems. The biggest disadvantage of the throttling control electro-hydraulic system is that there is a large throttling loss, the system ene...

AI Technical Summary

Problems solved by technology

The main problem of this kind of circuit is that in the process of frequent reciprocating movement, the hydraulic control check valve is frequently in the "on-off" state, which may cause shock and vibration of the hydraulic system, and is not suitable for frequently adjusted valve control systems; In addition, this circuit does not have a "lock" feature to lock the valve position

Images