High-pressure and high-efficiency centrifugal impeller

Abstract

The invention discloses a high-pressure and high-efficiency centrifugal impeller. The centrifugal impeller is installed in a centrifugal pump. The centrifugal pump further comprises a pump body, a water inlet and a water outlet. The centrifugal impeller is arranged in the pump body, and impeller blades of the centrifugal impeller are clamped between an impeller front cover and an impeller rear cover. An opening ring is arranged in the center of the impeller front cover, and an impeller annular wall concentric with the opening ring is arranged outside the opening ring; and a fit clearance is reserved between the opening ring and the inner wall of the water inlet, and the opening ring is inserted into the water inlet. A fit clearance is also reserved between the impeller annular wall and theouter wall of the water inlet; and the water inlet is wrapped between the opening ring and the impeller annular wall. According to the high-pressure and high-efficiency centrifugal impeller, oppositeflushing of fluid on the two sides of the fit clearance in the matching position between the impeller opening ring and the inner wall of the pump body is greatly reduced, and then the lift and efficiency are improved; and the centrifugal impeller is simple and feasible in structure, does not need to be greatly changed and can be directly applied to a traditional centrifugal impeller.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to a novel centrifugal pump impeller. Background technique [0002] Pump products are one of the important general-purpose mechanical products in various fields of the national economy. Centrifugal pumps occupy a large part of the market for pump products by virtue of their advantages of large flow and high efficiency. Its main working method is that the fluid enters from the water inlet of the pump body, and then enters the centrifugal impeller through the mouth ring of the centrifugal impeller to be pressurized and thrown out, and then flows out from the water outlet of the pump body, wherein the mouth ring of the centrifugal impeller and the water inlet of the pump body Because of the difference in motion state and fit tolerance during work, a large gap has to be left at the joint between the two, and because of the large fluid pressure difference on both sides of the g...

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Problems solved by technology

Its main working method is that the fluid enters from the water inlet of the pump body, and then enters the centrifugal impeller through the mouth ring of the centrifugal impeller to be pressurized and thrown out, and then flows out from the water outlet of the pump body, wherein the mouth ring of the centrifugal impeller and the water inlet of the pump body Because of the difference in motion state and fit tolerance during work, a large gap has to be left at the joint between the two, and because of the large fluid pressure difference on both sides of the gap, it is easy to form a hedge through the gap, which eventually leads to a significant increase in pressure and efficiency. decline

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