Energy-saving single-stage centrifugal pump long in service life

Abstract

Provided is an energy-saving single-stage centrifugal pump long in service life. The lower portion of a pump body (1) is provided with a suction chamber (2) of the pump, the upper portion of the pump body is covered with a pump cover (4) to form a delivery chamber (3) of the pump, and an impeller (5) rotates at a high speed in the delivery chamber of the pump. The right side of the delivery pump of the pump is connected with a delivery chamber outlet (6) of the pump, and the left side of the suction chamber of the pump is connected with a suction chamber inlet (7) of the pump. A water film bearing (8) is arranged at the lower portion of an inner hole of the pump cover, pressure water of the water film bearing is supplied by the delivery chamber of the pump, sucked water is filtered through an annular filter screen (9), enters the water film bearing through a conveying pipe (10) and is distributed to a static pressure cavity of the water film bearing through 4-12 throttling orifices (11) to form a rigid static pressure water film for a pump shaft (16), and the pump shaft rotating at a high speed is separated from the water film bearing through the 0.03-0.05 mm static pressure water film. The service life of the single-stage centrifugal pump is prolonged.

Description

technical field [0001] The invention relates to the structural design of a single-stage centrifugal pump. Background technique [0002] Cantilever single-stage centrifugal pumps, also known as conventional pumps in this application, are the most widely used pumps in water delivery machinery at home and abroad. Among centrifugal pumps, the utilization rate of conventional single-stage centrifugal pumps exceeds 80%. In the conventional pumps in the current domestic and foreign pump markets, the bearings supporting the radial force of the pump shaft are all rolling bearings. The rolling bearings must be lubricated with grease, so they must be separated from the pump impeller, the water delivery chamber is far away, and the cantilever is long. In the case of radial force and power arm, the longer the cantilever, the greater the bending stress on the pump shaft. It is inevitable to cause deflection of the pump shaft. The force of the fulcrum rolling bearing is large, the servic...

AI Technical Summary

Problems solved by technology

It is inevitable to cause deflection of the pump shaft. The force of the fulcrum rolling bearing is large, the service life of the bearing is short, and the noise is large, which causes defects such as wear of the impeller and the sealing ring, so the service life of the pump is short.

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