Regional Stability Control Torque Limiting System
A stability control and sub-area technology, applied in fluid pressure actuators, load suspension components, cranes, etc., can solve the problems of crane lifting capacity loss, high controller performance requirements, and increase system failure rate, etc., to achieve High security, improved utilization efficiency, and good stability control performance
Active Publication Date: 2017-10-27
XCMG XUZHOU TRUCK MOUNTED CRANE
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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
Method used
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Embodiment
[0041] Embodiment: Taking the knuckle-arm truck-mounted crane equipped with a regional stability control moment limiting system as an embodiment,
[0042] When the detection unit of the area detection unit 4 detects that the crane is working in the working area A, the signal processing part of the area detection unit 4 sends a high-level signal, the pressure compensation valve reversing valve 51 works at the a working position, and the pressure compensation valve reversing valve The connecting oil circuit of 51 is blocked by the one-way valve, the pressure compensating valve relief valve 52 acts as a pressurizing function, and the pressure signal of the rodless chamber of the first luffing cylinder is transmitted to the torque limiter through the explosion-proof valve 6 and the pressure compensating valve relief valve 52 The first oil port P of the control valve; when the operating torque of the crane reaches the torque limit setting value of the working area A, the torque limi...
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The invention discloses a regional stability control moment limiting system which comprises a region detection unit, a pressure compensation valve, a moment limiting unloading valve and a moment limiting control valve. The region detection unit is used for detecting the rotation angle of a crane to judge whether the work region of the crane is in a region A or a region B and control the work station of a pressure compensation valve reversing valve to be a work station a or a work station b. The pressure compensation valve enables the crane to have different maximum work moments in the region A and the region B and comprises the pressure compensation valve reversing valve and a pressure compensation valve overflow valve. A first oil opening of the pressure compensation valve and a second oil opening of the pressure compensation valve are formed in the outer portion of the pressure compensation valve. The first oil opening of the pressure compensation valve communicates with a first variable-amplitude rodless cavity through an anti-explosion valve and a first variable-amplitude balance valve. The second oil opening of the 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 regional 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 maximum working torqu...
Claims
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IPC IPC(8): F15B11/02B66C23/88B66C13/16
CPCB66C13/16B66C23/88B66C2700/03
Inventor 陈志伟满军满珍林小波贾善斌刘汉光薛卡
Owner XCMG XUZHOU TRUCK MOUNTED CRANE