The difference between piston pump and gear pump
Piston pump and gear pump are two common hydraulic pumps, which have significant differences in structure, working principle, performance, and application scenarios. The following are the main differences:
1. structure
Piston pump : composed of multiple plungers, cylinder bodies, distribution plates, and inclined plates, with a complex structure and high precision requirements.
Gear pump: composed of two meshing gears, pump body, and front and rear cover plates, with a simple structure and easy manufacturing.
2. working principle
Piston pump : By the reciprocating motion of the plunger in the cylinder, the volume is changed to achieve oil suction and discharge, usually an axial or radial piston pump.
Gear pump: It uses gear meshing to change the volume, achieve oil suction and discharge, and is divided into two types: external meshing and internal meshing.
3. performance
Piston pump :
-Pressure: High pressure, up to 40MPa or more.
-Traffic : Large and adjustable traffic.
-Efficiency: High volumetric efficiency and overall efficiency.
Noise : The noise is quite loud.
Gear pump :
-Pressure: Medium low pressure, usually below 20MPa.
Traffic : The traffic is small and fixed.
-Efficiency: The volumetric efficiency and overall efficiency are relatively low.
- Noise : The noise is relatively low.
4. Application scenarios
-Piston pump : Suitable for high-pressure and high flow applications, such as engineering machinery, metallurgical equipment, and ship hydraulic systems.
-Gear pump: Suitable for medium and low pressure, low flow applications, such as machine tools, agricultural machinery, and small hydraulic systems.
5. Maintenance and Cost
-Piston pump : Maintenance is complex and costly.
-Gear pump: easy maintenance and low cost.
Summary
Piston pump : High pressure, large flow rate, high efficiency, suitable for high demand occasions.
-Gear pump : Medium low pressure, small flow rate, low cost, suitable for simple applications.
The selection should be based on specific needs.
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