This is due to the construction machinery conditions are relatively special decision. Compared with ordinary hydraulic parts, construction machinery hydraulic parts have the following characteristics: Attention must be paid to the design, otherwise, the hydraulic parts you design are ordinary hydraulic parts, which can not meet the requirements of construction machinery.
1, the prime mover is the engine, not the motor, therefore, the speed change range is very large, generally from 600-2500RPM non-stop change, or even higher. The hydraulic pump connected with it must be adapted to ensure normal operation.
2. Bad working conditions. Construction machinery generally works outdoors, so wind, rain and sun, environmental pollution can be described as serious. For the hydraulic medium, the tightness of the oil tank is required to prevent the pollution of the hydraulic medium. For hydraulic parts, not only the friction pair of moving parts is required to have good wear resistance, but even its corrosion resistance should be considered; And it is necessary to consider appropriate and effective protection measures for the moving parts; To improve the reliability and life of the hydraulic valve.
