Centrifugal type volumetric pump

Abstract

The invention relates to a centrifugal type volumetric pump, belonging to the field of fluid conveying devices. The centrifugal type volumetric pump comprises a pump casing, wherein a cylindrical pump chamber is arranged in the pump casing, a rotor is arranged in the pump casing in an eccentric manner; end caps are arranged at two ends of the pump casing, and are used for closing the pump chamber, an oil inlet is arranged on any end cap, a plurality of radial holes are uniformly arranged in the circumferential direction of the rotor, plunger pistons are inserted in the radial holes in a matched manner, roller wheels are arranged at end parts of the plunger pistons facing towards the pump chamber; an axial oil outlet is arranged in the rotor, and is communicated with the radial holes; axial through holes are arranged in the plunger pistons, one-way valves are arranged in the axial through holes; a semi-cylindrical oil distributing shaft is arranged in the axial oil outlet, and is fixedly connected with the end cap at one side; when the rotor rotates, the oil distributing shaft can always shade one sides of the radial holes with gradually increasing volume; and springs are arranged in the radial holes, and are used for pushing the plunger pistons to stretch out. The centrifugal type volumetric pump is stable to move, is continuous and smooth to charge and discharge oil, and has the advantages of less internal leakage, low movement noise and reliability in use; moreover, the centrifugal type volumetric pump can be produced to an oil pump with low speed and low flow rate; and therefore the noise caused by movement can be lowered obviously.

Description

technical field [0001] The invention relates to a fluid conveying device, in particular to a displacement pump. Background technique [0002] Among the positive displacement pumps in the prior art, there is a vane pump. Its structure mainly includes a pump casing. A cylindrical pump chamber is arranged inside the pump casing. A rotor is eccentrically arranged in the pump chamber. Several grooves are opened radially on the rotor. The grooves are inserted with vanes one by one, one side of the pump casing is provided with an oil inlet, the other side of the pump casing is provided with an oil outlet, both ends of the pump casing are provided with end covers, and the blades are matched with the end covers. set up. When it works, the rotor rotates, and the centrifugal force makes the blades throw out, forming a volume-changing space between the blades, the pump casing and the rotor. Through the setting of the oil inlet and oil outlet positions, the oil inlet faces the gradually...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the mass of the blades of the pump is small, and a high speed is required to form a good seal between the blades and the inner cavity of the pump casing, and excessive wear is easy between the blades and the pump casing; in addition, the two ends and the top of the blades form Multiple sealing surfaces are likely to cause poor sealing and affect the efficiency of the pump

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