Single-suction 2G screw pump shell

Abstract

The invention relates to a single-suction 2G screw pump shell. The shell is in an integrated structure, the front end of the shell is provided with a front end cover, and the rear end of the shell is provided with a rear end cover; a drive shaft hole and a driven shaft hole which are communicated front and back are formed in the center of the shell; two sides of the shell are respectively provided with a connecting inlet flange end and a connecting outlet flange end; the lower part of the shell is provided with a heating air inlet, a heating air outlet and a sump oil discharge hole; the upper part of the shell is provided with a safety valve threaded hole and a safety valve pressure-relief hole; a local annular interlayer is arranged at the lower part of the shell, so that the heating area of a single-suction 2G screw pump can be increased, and transportation of high-viscosity media is applicable; base positioning holes are formed in the four corners of the bottom of the shell. According to the utility model, a pump body is formed with the front end cover and the rear end cover at one time, the parts are few, the assembly is simple, screws for positioning are not required, the assembling accuracy is high, the end covers have high supporting force, loosening and leakage are not caused after long-time working, and the performance is improved; the shell is suitable for medium with a kinematic viscosity of 6 to 6,000,000 mm2 / s and a flow of 0.3 to 350 m<3> / h; the production cost can be reduced, and good economic benefits and social benefits can be achieved.

Description

technical field [0001] The invention is an improvement on the casing structure of a single-suction 2G screw pump. Background technique [0002] Existing single-suction 2G screw pumps, the pump housing is fixedly connected into one body by the front end cover, the rear end cover and the pump body through screws. This structure will bring a series of problems: 1. The number of parts is large, and there must be a pump body, a front end cover, a rear end cover and multiple connecting screws, etc.; The body is fixed by screw positioning, and the screw positioning is very important, which needs to be determined by experienced people based on experience. If the operation is improper, a slight deviation will affect the assembly clearance of the pump, affect the bearing installation in place, and affect the screw assembly. This in turn leads to a decline in product quality, which directly affects the working quality of the pump; 3. Because the screw support rigidity is small, the fr...

AI Technical Summary

Problems solved by technology

This structure will bring a series of problems: 1. The number of parts is large, and there must be a pump body, a front end cover, a rear end cover and multiple connecting screws, etc.; The body is fixed by screw positioning, and the screw positioning is very important, which needs to be determined by experienced people based on experience. If the operation is improper, a slight deviation will affect the assembly clearance of the pump, affect the bearing installation in place, and affect the screw assembly. This in turn leads to a decline in product quality, which directly affects the working quality of the pump; 3. Because the screw support rigidity is small, the front and rear end covers are only connected to the pump body by screws, and the support force is limited. During the long-term operation of the pump, the screws are easy to loosen and leak , affecting work performance

4. Inconvenient maintenance and increased costs

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