Flow rate pairing valve and electrohydraulic actuating mechanism adopting same

Abstract

The invention discloses a flow rate pairing valve and an electrohydraulic actuating mechanism adopting the same. The upper part and the lower part of a valve body of the flow rate pairing valve are provided with a piston and a one-way valve core; a reset spring is arranged on the one-way valve core in a sleeving way; a baffle ring is arranged on the reset spring; five oil collecting openings are formed in the valve body; one end of an oil pump is connected with one side of a first oil collecting opening of a flow rate pairing valve A, and the other end of the oil pump is connected with one side of a first oil collecting opening of a flow rate pairing valve B; the other side of the first oil collecting opening of the flow rate pairing valve A is connected with a third oil collecting opening and a fifth oil collecting opening of the flow rate pairing valve B; the other side of the first oil collecting opening of the flow rate pairing valve B is connected with a third oil collecting opening and a fifth oil collecting opening of the flow rate pairing valve A; second oil collecting openings of the flow rate pairing valve A and the flow rate pairing valve B are respectively connected with oil openings of an oil cylinder; fourth oil collecting openings of the flow rate pairing valve A and the flow rate pairing valve B are respectively connected with an oil tank. The flow rate pairing valve has the advantages that the structure is simple and compact; an electromagnetic valve is not needed; the output is realized by controlling the motor; the system belongs to an integration integral system.

Description

technical field [0001] The invention relates to an electro-hydraulic control device, in particular to a flow matching valve and an electro-hydraulic actuator using the flow matching valve. Background technique [0002] At present, the most conventional way of action in the electro-hydraulic actuator of the valve is to use the motor to drive the oil pump in one direction, and control the opening and closing of the valve through the electromagnetic reversing valve. Due to the need for energization and time-lag characteristics of the electromagnetic reversing valve, this solution is not suitable for high-frequency operating conditions. At the same time, the electromagnetic reversing valve itself will also become a potential failure point, requiring frequent maintenance. In the case where explosion-proof is required, an explosion-proof electromagnetic reversing valve must also be selected, so the cost of this solution is high, the volume is large, and the reliability is not eno...

AI Technical Summary

Problems solved by technology

Due to the need for energization and time-lag characteristics of the electromagnetic reversing valve, this solution is not suitable for high-frequency operating conditions

At the same time, the electromagnetic reversing valve itself will also become a potential failure point, requiring frequent maintenance

In the occasions where explosion-proof is required, an explosion-proof electromagnetic reversing valve must also be selected, so the cost of this solution is high, the volume is large, and the reliability is not enough.

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