HAIDEXIN AIR HYDRAULIC CO.,LTD (HDX HYDRAULIC) HAIDEXIN AIR HYDRAULIC CO.,LTD (HDX HYDRAULIC)

The difference between gear pump and vane pump

The difference between gear pump and vane pump

Gear pump in operation of the most important parts for each other meshing gear. Meshing driven gear and driven gear are installed in two parallel shaft, because the teeth into and out of mesh, the formation of the volume between the teeth to create suction and drainage effect.
 
The main working part of vane pump is the rotor with a number of sliding blades. When the rotor turns, because of the stator inner cavity contour line or the eccentric configuration of the rotor, the blade slides in the blade slot, resulting in the change of working volume, thus creating suction and drainage effect.
 
Similarities:
 
1. All are reversed-type positive displacement pumps with certain self-priming capacity, but dry rotation is not allowed;
 
2. Both have continuous flow, but also pulsation of flow and pressure;
 
3. The theoretical flow rate is determined by the size and rotation speed of the working part, and has nothing to do with the discharge pressure;
 
4. Rated discharge pressure has nothing to do with the size and speed of the working parts, mainly depends on the sealing of the gear pump and the bearing capacity of the parts.
 
The gear pump Differences:
 
1. Gear pump structure is more simple, reliable, low price; Blade pump structure is more complex, parts manufacturing accuracy requirements are higher, the blade is more easy to jam, to oil cleaning degree and viscosity more sensitive;
 
2. The gear pump with irreversible design can usually be reversed, but the suction orifice changes after reversal, and the relief valve of the pump does not work; Blade pump is generally not allowed to reverse;
 
3. The single-acting vane pump can be designed to change the eccentricity by moving stator at the same speed to achieve the purpose of changing the direction variable.

The above: The development prospect of hydraulic high pressure gear pump is bright

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