Publish Time: 2023-10-18 Origin: Site
There are mainly two kinds of hydraulic pumps that we use in daily life, HYDRAULIC GEAR PUMP and vane pump. Today we will learn about their strengths and applications.
Here is the content list:
Main advantages of the HYDRAULIC GEAR PUMP
The difference between a HYDRAULIC GEAR PUMP and a vane pump
The main advantages of HYDRAULIC GEAR PUMP are simple structure, small size, lightweight, good workmanship, low price, strong self-priming ability, insensitivity to oil pollution, wide speed range, convenient maintenance, and reliable operation. Its disadvantages are severe oil trapping, large radial unbalanced force, large leakage, large flow pulsation, and high noise, so it cannot be used as a variable displacement pump. Low-pressure HYDRAULIC GEAR PUMP is widely used in low-pressure (below 25×105pa) hydraulic systems, such as machine tools, various oil supplements, and cooling devices. HYDRAULIC GEAR PUMP can also achieve higher working pressure after taking certain measures in structure. Medium pressure HYDRAULIC GEAR PUMP is mainly used in the hydraulic system of machine tool rolling equipment. Medium and high pressure and high-pressure HYDRAULIC GEAR PUMP are mainly used in agricultural and forestry machinery, construction machinery, ship machinery, and aviation technology.
Like the HYDRAULIC GEAR PUMP, the gear hydraulic motor has relatively low volumetric efficiency, so the input oil pressure cannot be too high, so it cannot generate a large torque, and the speed and torque pulsate with the gear meshing. Geared magnetic motors are mostly used in high rotational speed and low torque hydraulic power systems. HYDRAULIC GEAR PUMP can generally be directly used as a hydraulic motor, that is, both HYDRAULIC GEAR PUMP and gear hydraulic motor are reversible. Compared with the HYDRAULIC GEAR PUMP, the vane pump has the advantages of uniform flow, stable operation, low noise, long life, small outline size, and compact structure, but it also has the poor self-priming ability, small speed range, and high maximum speed. Low, the blade is easy to bite, the work reliability is poor, the structure is more complicated, and it is more sensitive to oil pollution.
Therefore, it is relatively seldom used in machinery with a dirty working environment and large speed range changes. It is rarely used in places where the reliability of work is very high, such as on airplanes. Vane pumps are used in low-pressure hydraulic systems, especially in the machine tool industry.
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