Method for testing resonant frequency of direct-drive plunger pump for ship

Abstract

The invention provides a method for testing resonant frequency of a direct-drive plunger pump for a ship. The method for testing the resonant frequency of the direct-drive plunger pump for the ship aims at overcoming the defects of an existing method for testing the resonance frequency of the pump for the ship, and the requirements of scientific research and engineering design can be met through simple and convenient operation, convenient data output and wider applicability. The method for testing the resonance frequency of the direct-drive plunger pump for the ship includes the steps that firstly, a reasonable monitoring point arrangement scheme is determined, an external excitation mode is adopted for exciting a system, and vibration responses of key nodes of the system are tested by adopting an acceleration sensor; and then, vibration data of the direct-drive plunger pump are collected through a data acquisition system, data processing is carried out by utilizing a back-end server, and the resonant frequency of various orders of the direct-drive pump system is determined. In order to meet the requirements for design, safety, detection and the like of a large ship pump, developing and establishing the method for testing the resonant frequency which is simple and convenient in operation have important significance.

Description

technical field [0001] The invention relates to a method for testing the resonant frequency of a direct-drive plunger pump for ships, which is mainly used for verification and monitoring of the natural frequency vibration mode characteristics of the direct-drive plunger pump. Background technique [0002] The hydraulic pump is an important part of the ship's power plant and other related equipment systems of the ship. Ship hydraulic pumps are generally required to have low operating vibration and good vibration resistance, small mechanical noise and fluid noise, sufficient impact resistance, good corrosion resistance and abrasion resistance, reliable sealing structure and sealing performance, etc. . The direct drive plunger pump uses a permanent magnet synchronous linear motor as the power unit to directly drive the plunger to reciprocate linearly, and cooperates with a highly integrated distribution valve to complete the water suction and drainage work. The vibration and ...

AI Technical Summary

Problems solved by technology

For small equipment, it is easy to excite and force measurement is simple, and the frequency response function method can be used for measurement, but for large equipment, the mass is large, excitation and force measurement are difficult, and the frequency response function method is not suitable for this working condition

The environmental excitation method is greatly affected by the interference of external environmental factors, it is uncontrollable and difficult to measure, and it is very random, requiring a long sampling time

For large equipment, the test results obtained often have large deviations

Images