Many engineering equipments are equipped with hydraulic systems. After the installation of hydraulic systems, the working efficiency of equipment has been significantly improved. But once the hydraulic system fails, how to quickly and accurately find out where the problem lies, today to everyone to talk about looking for skills.
First, how to find
The first one is to find the hydraulic fault according to the hydraulic system diagram. When the hydraulic system diagram analysis eliminates faults, the main method is to "grab two ends" - that is, grasp the power source (oil pump) and the actuator (cylinder, motor), and then "the middle â€, that is, the pipeline and control elements passing from the power source to the actuator. When â€œgrabbing both endsâ€, it is necessary to analyze whether the fault is in the oil pump, the cylinder and the motor itself. In addition to the middle, it is necessary to pay attention to analyzing whether the fault is on the connected hydraulic components, and pay special attention to clarifying which control method is adopted when the system transfers from one working state to another, and whether the control signal has Mistakes should be checked against actual objects one by one. Attention should be paid to the mutual interference between each main oil circuit and between the main oil circuit and the control oil circuit. If mutual interference occurs, it is necessary to analyze how to use adjustment errors. Wait.
Second, use the cause and effect chart to find hydraulic faults
Using the causality diagram (also known as the fishbone diagram) analysis method to analyze the failure of the hydraulic equipment, it can not only find out the primary and secondary causes of failure, but also can accumulate experience in troubleshooting.
Causality analysis is widely used because it can be closely linked with maintenance management and troubleshooting.
Third, the application of ferromagnetic technology to diagnose the fault of the hydraulic system and state monitoring
Iron spectrum technology is based on the wear of the mechanical friction pair. It uses iron spectrometer to separate the wear particles and other contaminant particles from the hydraulic oil, and makes the iron spectrum piece, which is then placed in a ferrography microscope or a scanning electron microscope. Under the observation, or in accordance with the size of the deposition in the glass tube, the application of optical methods for quantitative detection. Through the above analysis, important information about wear in the system can be accurately obtained. Based on this, the wear phenomenon is further studied, the wear condition is monitored, the fault precursors are diagnosed, and finally the system failure prediction is made.
Ferrography technology can be effectively applied to the detection, monitoring, analysis and fault diagnosis of the oil pollution degree in the hydraulic system of construction machinery, and it has the advantages of being intuitive, accurate, and rich in information. Therefore, he has become a powerful tool for the diagnosis and analysis of mechanical engineering hydraulic system faults.
Fourth, the use of fault phenomena and fault causes related to the analysis table to find hydraulic fault
According to the work practice, the related table of fault phenomena and fault causes (or provided by the manufacturer) is summarized, which can be used to find and process general hydraulic faults.
The pressure system performs self-diagnosis and is displayed on the fluorescent screen. The use and maintenance personnel can perform troubleshooting according to the contents of the displayed fault.
I hope my article will help you in finding faults.
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