Gear pump is a rotary pump that relies on the change and movement of the working volume between the pump cylinder and the meshing gear to transport liquid or pressurize it. Two closed Spaces are composed of two gears, the pump body, and front and back covers. When the gear rotates, the space volume of the gear's offside increases from small to large, forming a vacuum, inhaling the liquid, and the space volume of the gear's meshing side increases from large to large. And force the liquid into the pipe. The suction chamber and the discharge chamber are separated by the meshing lines of the two gears. The pressure of the gear pump outlet depends entirely on the resistance at the pump outlet.
Gear pump is a rotary pump that relies on the change and movement of the working volume between the pump cylinder and the meshing gear to transport liquid or pressurize it. Two closed Spaces are composed of two gears, pump body, and the front and back covers. When the gear rotates, the space volume of the gear's offside becomes larger from smaller, the liquid is sucked in, and the space volume of the gear's meshing side becomes smaller from larger. Squeeze the liquid into the pipe. The suction chamber and the discharge chamber are separated by the meshing lines of the two gears. The pressure of the gear pump outlet depends entirely on the resistance at the pump outlet.
The internal parts of the oil pump wear and tear will lead to internal leakage. Among them, the leakage area between the floating sleeve and the end face of the gear is large, which is the main part of the internal leakage. The volumetric efficiency of gear pumps with wear and internal leakage is reduced, and the output power of the pump is much lower than the input power. All of its losses are converted into heat energy, which causes the oil pump to overheat.
The main reason is floating hole wear. The gear is affected by the pressure oil. The gear end is close to the oil pump housing, and the low-pressure chamber part of the pump body is worn. Another kind of wear is the circumferential wear of the working surface inside the housing. This wear is mainly caused by the unclean oil added. When the high pressure oil chamber and the low pressure oil chamber lose their sealing and isolation function, the oil pressure of the high pressure oil chamber will flow into the low pressure oil chamber, which is called "internal leakage". Reduce the working pressure and flow of the oil pump.
Air is drawn into the oil pump from the gap between the oil seal and the spindle neck or from the joint between the oil intake transfer plate and the oil pump housing. It enters the tank through the return pipe, which will cause the amount of oil in the tank to decrease. The oil seal must be replaced to remove this problem. Fault. Insufficient oil supply or oil pump without oil pressure: the working device lifts slowly, wobbles or cannot lift when lifting; There are bubbles in the fuel tank or oil pipe; When the tractor is just started, the working device can be lifted, but after working for a period of time, the oil temperature rises, and the oil temperature rises slightly. It can be lifted under load, but cannot be lifted under heavy load.
