Experimental apparatus and method for obtaining multi-source diagnostic information of hydraulic equipment

Abstract

The invention relates to an experimental device and an experimental method for multi-source information fusion for fault diagnosis of a hydraulic device. The device comprises the following elements: a variable plunger pump, a gear pump, two motors, two suction filters, five throttle and stop valves, two electromagnetic relief valves, an electromagnetic proportional relief valve, two pressure meters, an energy accumulator, two sets of combined sensors, a three-position four-way electromagnet directional valve, a hydraulic motor and a cooler. The experimental device can simulate eight typical running states (faults) of the hydraulic device, including low efficiency, oil and liquid pollution, air suction, leakage, oil pump fault, relief valve failure, motor failure and mechanical failure and can perform cluster analysis and fusion diagnosis to characteristics of the eight faults through a self organizing maps neural network.

Description

technical field [0001] The invention relates to the field of state monitoring and fault diagnosis of hydraulic equipment, in particular to an experimental device for acquiring multi-source diagnostic information of hydraulic equipment and a method for acquiring multi-source dynamic information, state monitoring and fault control of hydraulic equipment using the device. Background technique [0002] With the continuous improvement of the degree of automation, the structure and information transmission process of hydraulic equipment are becoming more and more complex. It has become a complex of electromechanical and hydraulic integration and an integration of automation information. Early prevention, prediction and diagnosis of hydraulic failures have become urgent technologies to be solved. problem. At present, hydraulic equipment fault diagnosis technology lags behind other fields relatively. In terms of system diagnosis information acquisition and processing technology, it ...

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Problems solved by technology

[0003] 1) The complexity of failure mechanism and failure mode;

[0004] 2) Diversity and incompleteness of hydraulic system operating status and fault information;

[0012] 1) Deng Le et al., "Multi-sensor information fusion technology and hydraulic system condition monitoring fault diagnosis" proposed a multi-source information fusion hydraulic system condition monitoring and fault diagnosis system block diagram and design scheme, and the multi-source diagnostic information acquisition experimental device and Fusion method issues are not considered

[0013] 2) Gu Lichen, Zhang Youyun, Qiu Damou, "Research on the Recognition Technology of Hydraulic Power System Operation Status" proposed an experimental device for obtaining multi-source diagnostic information of hydraulic equipment, but it only involved the acquisition of current, fluid pressure and vibration signals, and did not involve experimental methods

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