The energy-saving link of hydraulic excavator mainly lies in the hydraulic pump. Based on the different circuits of hydraulic pump, the energy-saving methods are also different.
1. Constant pressure variable displacement pump
The device can achieve the purpose of excavator operation based on the flow output of the compression pump, and can save the excess oil in the relief valve compared with the hydraulic control of the relief valve. Therefore, it can effectively reduce the waste of oil.
2. Constant power variable pump
The principle of the pump is to control the amount of oil output based on the output pressure. It can keep the prime mover under full load, so it has the characteristics of high power, high efficiency and low consumption.
