A piston impeller axial force testing device of a centrifugal pump

By employing a rolling friction piston impeller axial force testing device in a centrifugal pump, the axial force is directly transmitted to the piston assembly for measurement, solving the problems of large friction interference and low accuracy in existing technologies. This achieves high-precision, real-time axial force testing, suitable for dynamic and variable operating condition testing of centrifugal pumps.

CN122345448APending Publication Date: 2026-07-07LANZHOU UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LANZHOU UNIVERSITY OF TECHNOLOGY
Filing Date
2026-05-28
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing centrifugal pump impeller axial force testing devices suffer from problems such as large frictional interference, low accuracy, inability to measure in real time, complex structure, and susceptibility to interference.

Method used

The piston-type impeller axial force testing device using rolling friction directly transmits the axial force to the piston assembly through a rolling snap-fit ​​component and a rolling contact component with the impeller. The oil pressure in the piston assembly is used for measurement, simplifying the structure and reducing friction interference.

Benefits of technology

It achieves high-precision, real-time, and lossless measurement of axial force, and is suitable for dynamic and variable operating condition testing of centrifugal pumps. It has a simple structure and high stability, and is suitable for long-term repeated use.

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Abstract

The present application relates to the technical fields of centrifugal pump impeller axial force testing, and discloses a piston type impeller axial force testing device of centrifugal pump, which comprises a pump body, an impeller driven by a motor arranged inside the pump body, a rolling clamping assembly fixed on the rotating shaft of the motor output end, and the rolling clamping assembly is rolling clamped with the middle part of the impeller; a cylinder body is connected with the right end of the pump body through a pump cover, a piston assembly is arranged inside the cylinder body, a rolling contact assembly is arranged at the left end of the piston assembly, and the right end of the impeller is rolling contacted with the left end of the rolling contact assembly after extending into the inside of the pump cover. The present application adopts rolling friction throughout, greatly reduces the force testing interference, significantly improves the testing accuracy, has very small friction resistance, and eliminates the additional force interference caused by sliding friction from the root, so that the pressure value measured by the pressure gauge can truly and accurately reflect the actual axial force suffered by the impeller.
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