[Introduction] Hydraulic failure refers to the situation where the hydraulic component or system loses its function and some problems occur. Compared with general mechanical and electrical faults, hydraulic faults are characterized by concealment, staggering and randomness.
Here's how to find the fault: First, find the hydraulic fault according to the hydraulic system diagram
When the hydraulic system diagram analysis is used to troubleshoot, the main method is to “grab two ends†and then “connect the middleâ€. When "grabbing two ends", it is necessary to analyze whether the fault is in the oil pump, the cylinder and the motor itself. In addition to paying attention to whether the fault is out of the hydraulic components on the connected line, it is necessary to pay special attention to knowing which control method is used when the system is transferred from one working state to another, and whether the control signal has Wrong, wait.
Second, the use of hydraulic failure to find cause and effect diagram <br> <br> use cause and effect diagram (also known as fishbone) analysis method, hydraulic equipment failure appeared analysis, both primary and secondary quickly find the cause, but also to accumulate Troubleshooting experience.
Third, the application of ferrography technology to diagnose and monitor the faults of hydraulic systems
The ferrography technology is based on the wear of the mechanical friction pair. The wear particles and other contaminated particles in the hydraulic oil are separated by means of a ferrite spectrometer, and the iron spectrum is prepared and placed in a ferrography or scanning electron microscope. The observation is carried out or deposited in a glass tube in order of size, and optical detection is used for quantitative detection. Through the above analysis, important information about the wear and tear in the system can be accurately obtained. Based on this, the wear phenomenon is further studied, the wear state is monitored, the precursor of the fault is diagnosed, and the system failure prediction is made after the Zui.
Fourth, the use Symptoms related to the cause of the fault analysis table lookup hydraulic failure <br> <br> according to practice, summed up the reason for the failure phenomenon and failure correlation table (or provided by the manufacturer), can be used to find the general and hydraulic failure deal with.
Fifth, self-diagnosis function use the device to find hydraulic failure <br> <br> With the continuous development of electronic technology, at present, many large and medium sized construction machinery, using computer control, through the interface circuit and sensor technology, its hydraulic The system performs self-diagnosis and displays it on the screen. The user and the repairer can perform troubleshooting according to the content of the displayed fault.
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