Improved axial force balance mechanism of centrifugal pump impeller

Abstract

The invention relates to an improved axial force balance mechanism of centrifugal pump impeller, which consists of a centrifugal pump impeller and a pump cover, wherein, the backside of the centrifugal pump impeller is fixed with a plurality of radial back blades; the radial back blades are arrayed along the circumference direction in a spacing manner; gaps are arranged between the radial back blade and the outer circumference of a shaft sleeve of the centrifugal pump impeller; the back end of the each radial back blade is fixed with a ring-shaped disc; the inner end surface of the pump cover is provided inside with a convex platform which extends into the gap between the radial back blade and the shaft sleeve of the centrifugal pump impeller. The back blade conducts a circumferential motion with the rotation of the impeller, the back blade can produce a pressure differential to balance an axial force or to reduce a volume loss or to reduce a soil and sand abrasion. The volume of the back blade in the invention is smaller than that of the prior back blade so as to reduce the material consumption quantity and simultaneously to reduce the processing hour as well; the requirement on the axial gap is not high, thereby the application scope and condition can be widened; when the impeller is rotated, the energy loss of the liquid is reduced, and simultaneously the axial vortex and the secondary backflow are reduced, the efficiency is improved.

Description

technical field [0001] The present invention relates to the field of machinery, in particular to centrifugal pumps, in particular to impellers of water pumps, and in particular to an improved axial force balance mechanism for impellers of centrifugal pumps Background technique [0002] In the prior art, back vanes or back impellers are often arranged on the centrifugal pump impeller, which can balance the axial force, improve pump efficiency and save materials. The traditional back blade structure is relatively large, requiring more processing surfaces and wasting materials. And the axial clearance needs to be strictly controlled. At present, most single-stage single-suction centrifugal pumps use balance holes to balance the axial force instead of back blades. However, pumps using balanced holes are less efficient than pumps using back vanes. Contents of the invention [0003] The purpose of the present invention is to provide an improved axial force balance mechanism o...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an improved axial force balance mechanism of centrifugal pump impeller, said axial force balance mechanism of this improved centrifugal pump impeller will solve the axial force balance of centrifugal pump impeller in the prior art Technical issues with unsatisfactory structures

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