Double-hydraulic-motor pressure balance self-protection hydraulic system

Abstract

The invention provides a double-hydraulic-motor pressure balance self-protection hydraulic system. The double-hydraulic-motor pressure balance self-protection hydraulic system comprises a first two-way motor, a first balance valve, a second balance valve, a second two-way motor, a first explosion-proof valve, a second explosion-proof valve, a control oil port WA, a control oil port WB and an oil return port WT. By arranging the first explosion-proof valve and the second explosion-proof valve, the stability and safety of the bidirectional hydraulic motor can be improved.

Description

technical field [0001] The invention relates to a double hydraulic motor pressure balance self-protection hydraulic system. Background technique [0002] The dual oil cylinders of the actuator in the prior art solve the problem of different pressures of the two oil cylinders by installing a balance valve. [0003] In the application document with the Chinese application number 201110365008.4 and the announcement date of 2012.6.20, a double cylinder synchronization system of a bridge inspection vehicle is disclosed. pressure valve, the double driving cylinders are double-acting cylinders, the two ends of each driving cylinder are respectively hinged with the fixed seat and the U-shaped cross-section working platform, the two driving cylinders and their oil circuits are connected in parallel, and the one-way back pressure valves are respectively It is connected between the oil port of the rod cavity of the two driving cylinders and the working oil port of the balance valve, o...

AI Technical Summary

Problems solved by technology

[0004] However, the oil ports of the rod chambers of the two drive cylinders of this system are only connected to one one-way back pressure valve; The two one-way back pressure valves are not connected; when the hydraulic oil flows in from port A of the balance valve, it flows through one of the drive cylinders and the one-way back pressure valve connected to the drive cylinder, and then flows from port B of the balance valve. The hydraulic oil cannot flow between the two drive cylinders; the pressure balance of the two drive cylinders cannot be achieved, so that when the two one-way back pressure valve sections are inconsistent or have different performances, it will cause a gap between the two drive cylinders. The pressure is different, and the driving cylinder will vibrate when it is working

At the same time, when the pipeline in the system leaks or bursts, the connecting oil port cannot be closed automatically, so the safety and reliability of the system are low

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