Runner type liquid membrane wear ring device of chemical centrifugal pump

Abstract

The invention discloses a runner type liquid membrane wear ring device of a chemical centrifugal pump. The device is primarily composed of a pump body, an impeller, a runner type liquid membrane wearring of the pump body, a runner type liquid membrane wear ring of the impeller, a pump cover, a pump shaft and a bearing bracket. By arranging runner type liquid membrane grooves formed by a pluralityof rhombi, a pump permeates into a medium to the rhombic liquid membrane grooves in high speed transfer, so that each groove is filled with a medium fluid, the medium can be prevented from reflowingto the inlet of the impeller from the outlet of the impeller as a result of surface tension generated by rotation of the fluid, and therefore, a part of leakage is further prevented, and the work efficiency of the chemical pump is improved. Conventional wear contact surface is changed to rhombic line contact, so that wear is controlled in the minimum contact area range, and meanwhile, a formed fluid diaphragm play a certain lubricating role on the wear ring, so that the wear is further reduced, and the service life of the wear ring is prolonged.

Description

technical field [0001] The invention relates to the field of pumps, in particular to a channel-type liquid film mouth ring device for chemical centrifugal pumps. Background technique [0002] Chemical centrifugal pumps are widely used in the chemical industry, and their working environment is harsher than that of centrifugal pumps in other industries. The mouth ring device is a common component to limit the leakage of the high-pressure liquid in the pump body of the chemical pump to the low-pressure area of ​​the impeller inlet. Due to the small gap between the mouth rings, a certain amount of medium leakage and noise pollution will be generated when the chemical pump is running. At the same time, as a part that is extremely easy to wear in chemical pumps, the gap between the mouth rings will continue to increase as the use time increases, resulting in leakage of part of the conveying medium and reducing the efficiency of chemical pumps. [0003] Chinese Patent Application...

AI Technical Summary

Problems solved by technology

Although the self-calibration function of the floating ring can compensate the shape deviation caused by the assembly error to reduce the leakage loss at the mouth ring and avoid the wear between the mouth ring and the impeller, the wear and noise between the mouth rings are still not fundamental At the same time, with the increase of the use time, the amount of wear supply will gradually decrease, which will lead to increased gaps and increased leakage; moreover, this kind of device uses more parts, which increases the processing and assembly of parts. difficulty

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