For the failure of the hydraulic system of the Honggang cutting machine on site, according to the working principle of the hydraulic system, according to the power component → control component → actuator
The order is forward reasoning on the system diagram to analyze the cause of the failure. If the transmission arm works weakly, from the principle analysis, it is considered that the work is weak due to the oil.
Caused by a drop in pressure or a decrease in flow.
From the system diagram, the possible factors that cause pressure drop or flow reduction are:
1, the fuel tank, such as lack of oil, oil suction filter blockage, vent hole is not smooth;
2 the internal leakage of the hydraulic pump, such as the matching clearance of the pump parts;
3. The pressure of the main safety valve on the control valve is too low or the internal leakage is serious;
4. The internal leakage of the hydraulic cylinder is serious;
5, the return to the oil road is not smooth.
After considering these factors, some factors are excluded based on the existing inspection results, and the scope of the fault is narrowed until the fault point is found and excluded.
In the fault diagnosis of the hydraulic system of Honggang cutting machine, according to the working principle of the system, it is necessary to master some rules or common sense;
First, analyze whether the fault process is a gradual change or a sudden change. If it is a gradual change, it is generally lost due to wear and tear due to the change of the original size and fit.
Function; if it is a sudden change, it is often caused by sudden damage to the parts, if the spring breaks, the seal is damaged, the moving parts are stuck or the dirt is clogged.
Second, it is necessary to distinguish whether it is a wearing part or a non-wearing part, or a moving part under high frequency and heavy load, or a hydraulic component that is prone to failure. And everywhere
At low frequencies, light loads, or substantially static components, failure is less likely to occur. After mastering these rules, it can play a positive role in quickly determining the fault location.