Preparation method of rubber lined three-screw pump

Abstract

The invention relates to a preparation method of a rubber lined three-screw pump. According to the method, a rubber lining method for rubber injection in the end part and exhausting in the middle is adopted, so that the rubber injection difficulty is lowered. A filter device is arranged on an exhaust opening; the filter device permits the gas to pass and to be exhausted, but a dense filter membrane can prevent rubber matrix from flowing outside, so that waste of the rubber matrix since the rubber matrix flows outside can be prevented; the pressure in a screw mold can also be improved and stabilized; the adhesive capacity of the rubber matrix on screws is enhanced; and the rubber lining quality is improved. Low-speed rotation of the screws in the rubber lining process is kept; and front pressure surfaces and the reverse pressure surfaces of the screws can be continuously alternated, so that the fluid in a channel generates uniform extrusion force on the screws; the surfaces of the screws are lined with rubber evenly; rubber lining is only carried out on a driven screw while rubber lining is not carried out on a driving screw; installation and assembly of the screw pump are kept convenient; and abrasion between the driving screw and the driven screw and between the driven screw and the inner wall of the pump can be avoided after the driven screw is lined with rubber.

Description

technical field [0001] The invention relates to the technical field of screw pumps, in particular to a preparation method of a rubber-lined three-screw pump. Background technique [0002] The three-screw pump has received more and more attention due to its advantages such as reasonable structure, energy saving and environmental protection, no unilateral wear of the screw rotor, few leakage points, low leakage, effective reduction of the impact of oil pollution on the environment, and remarkable power saving effect. In recent years, it has shown good development prospects and played an important role in pillar industries such as petroleum, chemical industry, metallurgy, electric power, shipbuilding, and environmental protection. [0003] The screw pump works by the rotating movement of the screws that mesh with each other. During the rotation of the screws, the material will have a certain friction with the screw and the inner wall of the pump, so that the working surface bet...

AI Technical Summary

Problems solved by technology

However, after long-term practice, the inventors found that the pressure in the mold channel is difficult to increase due to the continuous exhausting of the exhaust port in the middle of the mold during the rubber lining process, and the pressures on the various parts of the screw are not the same. The screw surface facing the flow direction of the colloid is under greater pressure, while the screw surface facing away from the colloid flow is under less pressure. The existence of the pressure difference leads to different adhesion of the colloid on the surface of the screw, and there is still the problem of uneven lining

Images