Variable fluid pump can be used as a single-action vane pump, radial piston pump, axial piston pump. As its types and models continue to be enriched, its range of applications is also on the rise. For example, variable-displacement pumps play an increasingly important role in construction machinery, metallurgy, mining, shipping and civil aviation. How does variable pump work? Variable displacement pump principle variable displacement pump is a variable displacement pump. Variable pump can be a single-action vane pump, radial piston pump or axial piston pump, widely used in metallurgy, mining, engineering machinery, ships, civil aviation ground equipment and other fields of hydraulic transmission. Variable displacement pump radial piston pump including piston eccentric and shaft eccentric, axial piston including swash plate and inclined axis. The bidirectional variable displacement pump refers to a pump that can change the displacement by changing the inclination of the swash plate of the variable displacement mechanism such as the axial piston pump or the compression ratio under the condition that the rotation direction of the prime mover is constant. For example, the original northeast - southwest, to northwest - southeast, then the variable displacement pump into the original oil port, the original oil port into a suction port, which changed the flow direction. In a closed circuit, thus changing the direction of rotation of the load, such as swashplate swash plate and the rotation of the cylinder, the plunger in the cylinder sucks oil for a while, and then press the oil. The variable displacement pump can be a single acting vane pump, a radial piston pump or an axial piston pump. The gear pump and the double acting vane pump are generally quantitative pumps. The variable displacement pump has the advantages of complex structure and high price; the variable displacement piston pump relies on the outlet pressure feedback The mechanism controls the swashplate angle so as to control the stroke of the plunger to achieve the purpose of controlling the flow. The variable vane pump controls the eccentricity of the eccentric ring by the outlet pressure feedback mechanism to achieve the purpose of controlling the flow. That is to say, the variable plunger swash plate is vertical When the flow is zero, the same vane pump. Through the above analysis, we have a preliminary understanding of the working principle of the variable displacement pump, but in the actual use of variable displacement pump, you can not rely solely on theoretical knowledge, but also need to understand the actual situation.
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