Screw pump with low viscosity and high pressure

Abstract

The invention discloses a screw pump with low viscosity and high pressure. The screw pump comprises a pump body, a driving screw, a bearing and a sealing structure, wherein the driving screw, the bearing and the sealing structure are arranged in the pump body. A driven screw is further arranged in the pump body. The bearing and the sealing structure are arranged on the driving screw in a sleeving manner. A pump cavity is formed in the pump body, and a bushing is arranged in the pump cavity in the axial direction. The driving screw and the driven screw are arranged in the bushing which is provided with matching holes. The side wall of the driven screw is in engaged fit with the side wall of the driving screw, and the two ends of the side wall of the driven screw are connected with the top inner wall and the bottom inner wall of the pump cavity correspondingly. The bottom of the driving screw is arranged over the bottom inner wall of the pump cavity. The screw pump with low viscosity and high pressure is simple in structure, small in size, compact in layout, convenient to install, durable, resistant to abrasion, high in pressure and low in internal leakage of flow, the abrasion resistance and durability of the engaged screw pair and the surface of the inner wall of the bushing can be effectively enhanced, power energy consumption can be reduced, and the service life can be prolonged.

Description

technical field [0001] The invention relates to the field of screw pumps, in particular to a low-viscosity, high-pressure screw pump. Background technique [0002] The screw pump is a rotary pump that relies on the volume change and movement of the meshing space formed by the pump body and the screw to transport or pressurize the liquid. The screw pump is divided into single screw pump, twin screw pump and screw pump according to the number of screws. Its working principle is that when the motor drives the pump shaft to rotate, the screw rotates around its own axis on the one hand, and on the other hand it rolls along the inner surface of the bushing, thus forming a sealed chamber of the pump. The liquid is pushed forward by one pitch, and with the continuous rotation of the screw, the liquid is pressed from one sealed chamber to another in a spiral manner, and finally squeezed out of the pump body. As a new type of liquid conveying machinery, the screw pump has the advanta...

AI Technical Summary

Problems solved by technology

[0004] Due to the limitations of structural design, selection of process materials and many other problems in the existing screw pumps, the structure is not simple, compact and durable enough, resulting in axial force, centrifugal force, radial Excessive force, high power, easily damaged problems

Especially when conveying low-viscosity media such as: coolant, emulsion, saponified liquid, cooling oil, grinding fluid, cooling water and other media, it is not economical and durable

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