Centrifugal pump sealing wear ring with double rows of adjustable rolling balls

Abstract

The invention discloses a centrifugal pump sealing wear ring with double rows of adjustable rolling balls. The centrifugal pump sealing wear ring mainly comprises a circular ring, the rolling balls and sleeve rods, a plurality of hemispherical grooves are formed in the inner side wall of the circular ring in the circumferential direction, and the grooves are arranged in two rows side by side in the radial direction; and a through hole penetrating through the ball center is formed in each rolling ball, and the rolling balls are limited in the grooves through the sleeve rods penetrating through the through holes. When the matching relation between an impeller and the sealing wear ring deviates, mutual friction of the matching portions of the impeller and the sealing wear ring can be changed into rolling friction, friction force is greatly reduced, abrasion of a pump body sealing ring and an impeller wear ring is reduced, the service life of the pump body sealing ring and the impeller wear ring is prolonged, and the volume efficiency of the water pump is improved. The centrifugal pump sealing wear ring also has the advantage of easy maintenance, and when the rolling balls are seriously abraded, the rolling balls can be directly replaced to save materials and cost.

Description

technical field [0001] The invention relates to a centrifugal pump structure in the field of fluid machinery, in particular to a centrifugal pump sealing ring with double rows of adjustable rolling balls. Background technique [0002] The sealing ring is a key component of the centrifugal pump, which is closely related to the overall efficiency of the centrifugal pump. The impeller and the sealing ring of the centrifugal water pump are a pair of matching parts. The materials of the parts are all made of metal, and they are hard-fitted with each other. The impeller is installed on the rotating shaft of the water pump, and the sealing ring is fixed on the volute. The structure of the traditional centrifugal pump impeller mouth ring and pump body seal ring is generally made of integral cast iron, 45 steel, stainless steel and other materials, and its wear resistance is not high. When the matching relationship between the impeller and the seal ring deviates, the impeller and the...

AI Technical Summary

Problems solved by technology

However, its production steps are cumbersome and not suitable for industrial mass production.

In addition, a patent document with the notification number CN 2541637Y discloses a centrifugal pump mouth ring self-compensating constant gap sealing structure. The gap between the parts remains unchanged with the increase of the wear degree of the parts. Under the action of pressure, it can self-compensate the wear, so as to maintain the original constant gap and achieve the sealing effect, which better solves the problem of hard fit between the impeller and the sealing ring. However, the sealing structure has direct friction between the rotating impeller and the rubber sealing ring, which increases the mechanical friction resistance and consumes energy.

Images