Proportional Zoned Stability Control Torque Limiting System

Abstract

The invention discloses a proportion type regional stability control moment limiting system which comprises a region detection unit, a proportion pressure compensation valve, a moment limiting unloading valve and a moment limiting control valve. The region detection unit is used for detecting the current work region of a crane and controlling the set pressure of the proportion pressure compensation valve. The proportion pressure compensation valve is a proportion type pressure compensation valve and can continuously set a pressure set value in proportion in real time according to input electrical signals and set the crane to have different maximum work moments in different work regions. A first oil opening of the proportion pressure compensation valve and a second oil opening of the proportion pressure compensation valve are formed in the outer portion of the proportion pressure compensation valve. The first oil opening of the proportion pressure compensation valve communicates with a first variable-amplitude rodless cavity through an anti-explosion valve and a first proportion variable-amplitude balance valve. The second oil opening of the proportion pressure compensation valve communicates with a first oil opening of the moment limiting control valve. A moment limiting valve is jointly formed by the moment limiting unloading valve and the moment limiting control valve, and the moment limiting function of the crane is achieved.

Description

technical field [0001] The invention relates to a proportional subregional stability control moment limiting system, which belongs to the technical field of truck-mounted cranes. . Background technique [0002] In recent years, with the development of market and technology, the lifting capacity of truck-mounted cranes has been continuously improved, and the application of knuckle-arm cranes in our country is increasing day by day, and the requirements for their operation safety are also increasing. The function of the torque limiting system is to limit the operating torque and play the role of safety protection. Therefore, the moment limiting system, as the main safety protection system of the truck-mounted crane, has gradually become the research focus of the truck-mounted crane. [0003] In the prior art, a technical solution based on a hydraulically controlled torque limiting valve to realize the torque limitation of the truck-mounted crane has been proposed, but the ma...

AI Technical Summary

Problems solved by technology

This solution can well solve the above-mentioned problem of loss of crane lifting capacity due to the uniqueness of the maximum working moment, and improve the utilization efficiency of the crane's lifting capacity, but requires more sensor elements, which increases the system failure rate , and the controller has high performance requirements and high cost, so it is not suitable for the use of low-cost truck-mounted cranes

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