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In the hydraulic system, the charge pump and the oil supply pump are two indispensable devices. They each have different functions to ensure the efficient operation of the system. Although their basic purpose is related to the replenishment of oil, there are significant differences in structure, working principle and application scenarios.
The charge pump is usually defined as a quantitative pump installed on the main pump and driven by the main shaft of the main pump. Its core function is to automatically replenish the oil loss caused by leakage or other reasons to ensure the stability of the pressure of the hydraulic system. The working mechanism of the charge pump is to maintain the pressure balance inside the system through continuous oil replenishment to prevent system failure caused by insufficient oil. In addition, some charge pumps also have the function of cooling and filtering oil, further improving the quality of oil and the reliability of the system.
From a structural point of view, the charge pump usually adopts the form of gear pump, vane pump or plunger pump. Among them, the gear pump is widely used because of its simple structure, small size and light weight. Its working principle is to extract liquid from the low-pressure oil circuit by driving the piston or rotor in the pump body, and transport it to the high-pressure oil circuit after pressurization. At the same time, the charge pump is equipped with an independent oil replenishment overflow valve to limit its maximum working pressure and ensure the safety and stability of the system.
In contrast, the charge pump is a device specifically used to replenish oil to the hydraulic system. It is widely used in situations where the oil tank is insufficient or needs to be replenished regularly. The main function of the charge pump is to replenish oil to the oil tank or hydraulic system to ensure that the system has sufficient oil supply. During the maintenance of the hydraulic system, the charge pump is also often used to replace the oil or perform system cleaning operations.
In terms of structural design, the charge pump has various forms, including centrifugal pumps, screw pumps and piston pumps, etc. The specific choice depends on its application scenario and performance requirements. Its working principle is usually to drive the pump body to rotate or reciprocate through a driving mechanism (such as a motor or engine), so as to extract the oil in the oil tank and transport it to the system or a designated location.
In terms of application scenarios, the charge pump is widely used in various hydraulic systems, especially in engineering machinery, ships, aerospace and other fields. The need for continuous oil replenishment and maintaining stable pressure makes the role of the charge pump particularly important. The charge pump is not only an indispensable component in the hydraulic system, but its stability and reliability directly affect the operating efficiency and safety of the entire system.
Relatively speaking, although the charge pump is not as important as the charge pump in the hydraulic system, its role in ensuring sufficient oil supply in the system and auxiliary maintenance cannot be underestimated. The charge pump provides necessary support for hydraulic stations on industrial production lines, automobile maintenance and repair shops, etc., ensuring the normal operation of the system.
