Vertical type pump unit shafting vibration parameter test calculating method

A calculation method and shafting vibration technology, applied in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problems of complex installation, commissioning and operating conditions, and the inability to accurately simulate pump sets, etc.

Inactive Publication Date: 2018-04-10
KUNMING UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, due to the complexity of installation, commissioning and operating conditions, numerical calculation methods based on finite elements cannot accurately simulate the actual operating conditions of pump sets

Method used

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  • Vertical type pump unit shafting vibration parameter test calculating method
  • Vertical type pump unit shafting vibration parameter test calculating method
  • Vertical type pump unit shafting vibration parameter test calculating method

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Experimental program
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Embodiment 1

[0087] Such as figure 1 As shown, the experimental calculation method of the shafting vibration parameters of the vertical water pump unit:

[0088] Since the motor rotor and the pump runner of the water pump unit are rotating parts, it is difficult to measure the swing in the running state. Usually, the water pump unit in actual operation indirectly reflects the lateral vibration of the pumping station by measuring the swing of the upper guide shaft system, the lower guide bearing, and the water guide bearing. Therefore, it needs to be converted into the swing value at the rotor of the motor of the water pump unit and the runner of the water pump according to the geometric structure of the shaft system;

[0089] The shaft system structure and parameters of the vertical water pump unit of the present invention are as attached figure 1 shown. In the anhydrous start-up test of the pumping station, the test is the rotational speed data, and the rotational speed is converted in...

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Abstract

The invention relates to a vertical type pump unit shafting vibration parameter test calculating method, belonging to the technical field of water pump, pump station operation stability analysis and rotor dynamics. By means of the two processing technologies that the additional external force of a water pump rotating wheel under the water-free starting test working condition is approximately zero,and the additional external force of a motor rotor is approximately zero when the external force is at the rated angular speed, an extraction calculation method of shafting vibration features is established. The method includes step 1 calculating the swing degree of the motor rotor and the water pump rotating wheel by using the swing degree measuring point data; step 2, calculating the inherent frequency, the damping ratio and the mass eccentricity of the water pump rotating wheel; and step 3, calculating the inherent frequency, the damping ratio and the mass eccentricity of the motor rotor.The method provides a convenient calculation method and means for water pump operation stability research, and the analysis of vibration characteristics of the water pump unit. Meanwhile, the method can be applied to commercial software related to online monitoring, fault diagnosis and the like of a water pump unit.

Description

technical field [0001] The invention relates to a test and calculation method for vibration parameters of a shaft system of a vertical water pump unit, and belongs to the technical fields of operation stability analysis of water pumps and pump stations and rotor dynamics. Background technique [0002] In recent years, with more and more large-scale water pump units put into operation, the vibration problem of large-scale pump units has become an important factor affecting the operation safety of water pump units. The vibration characteristics of the shaft system of the pump unit are the core element of the pump unit vibration, and the most direct theoretical basis and basis for formulating a vibration treatment plan. However, due to the influence of multi-source factors such as the complexity of manufacturing, installation and operating conditions, the extraction and calculation of the vibration characteristics of the pump unit in actual operation is extremely difficult. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 曾云钱晶吕顺利张记坤张振凯杨光波王芳芳古志吴一凡李敏侯睿
Owner KUNMING UNIV OF SCI & TECH
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