Two-screw pump and preparation method of corresponding rubber lined screw rods of two-screw pump

Abstract

The invention discloses a two-screw pump and a preparation method of rubber lined screw rods of the two-screw pump. The two-screw pump comprises a pump body, a pump front cover, a pump rear cover, a driving screw rod and a driven screw rod, wherein the driving screw rod and the driven screw rod are arranged in the pump body and meshed with each other; the pump body adopts such a transmission manner that liquid inlets are formed in two ends of the pump body and a liquid outlet is formed in the middle of the pump body; the surface of the driving screw rod as well as that of the driven screw rod is lined with a layer of rubber. The preparation method comprises the following steps: conducting de-oiling and sand-blast treatment on the outer surfaces of the screw rods; coating the outer surfaces of the screw rods with a layer of an adhesive after cleaning and drying; placing the screw rods coated with the adhesive into a screw rod mold for rubber injection; performing vulcanization molding in a large-scale rubber vulcanization tank; opening the screw rod mold after cooling, so that the required rubber lined screw rods are obtained. The surfaces of the driving screw rod and the driven screw rod are lined with the layers of rubber in such a manner of local rubber injection and local air discharge, so that the preparation method is simple and easy to operate, the rubber injection difficulty is reduced, and the quality of a rubber body is also guaranteed; the two-screw pump is resistant to abrasion, high in sealing performance and long in service life, and the medium through capability can be effectively improved.

Description

Technical field [0001] The invention relates to a twin screw pump, in particular to a twin screw pump and a method for preparing a rubber-lined screw in the twin screw pump. Background technique [0002] The twin-screw pump is a positive displacement pump, which relies on the volume change of the sealed cavity formed by the two intermeshing screws and the inner wall of the pump to suck and discharge liquid. It is characterized by smooth liquid delivery and strong self-priming performance. It does not form eddy current when conveying the medium, is not sensitive to the viscosity of the medium, and can convey high-viscosity medium, so it has gradually been widely used in various industrial sectors. According to the working principle of the screw pump, there must be several sealed cavities in the pump which are isolated from each other, so that the suction port and the discharge port of the pump are tightly separated. Therefore, the screw pump must meet the following sealing condit...

AI Technical Summary

Problems solved by technology

In this way, the gap between the two screws and the gap between the screw and the inner wall of the pump increases a little bit with the gradual wear of the two, which increases the leakage flow when the transported material moves forward. At the same time, when the screw pump transports impurities When the content of the liquid is high, some hard impurities will easily block the screw, thus reducing the working efficiency

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