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Fan base, fan overall equipment and fan vibration control method

A fan, integrated technology, used in mechanical equipment, machines/engines, liquid fuel engines, etc., can solve problems such as unfavorable vibration response control, high frequency, and eccentricity.

Pending Publication Date: 2022-02-11
CNNC NUCLEAR POWER OPERATION MANAGEMENT +1
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AI Technical Summary

Problems solved by technology

[0002] In the fan operating in nuclear power plants, the frequent failure of the fan is in the form of vibration exceeding the standard (flexible connection vibration standard ≤ 5.5mm / s), which is considered to be insufficient rigidity of the fan base and the rubber vibration isolator of the fan is easy to age , the vibration isolation performance is reduced. According to the calculation of the existing overall equipment weight and the stiffness of the rubber vibration isolator, the natural frequency of the system is about 11Hz. The frequency is too high, and the vibration isolation effect is not ideal.
Moreover, the location of rubber vibration isolators is obviously unreasonable, and there is an eccentric phenomenon. When vibrating, vibration coupling will occur, which is not conducive to vibration response control.

Method used

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  • Fan base, fan overall equipment and fan vibration control method
  • Fan base, fan overall equipment and fan vibration control method
  • Fan base, fan overall equipment and fan vibration control method

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] see image 3 , the present invention provides a fan base 1, the stiffness of the fan base 1 is improved by diagnosing the faults existing in the existing fan base according to the modal vibration data of the model; the fan base 1 is provided with a wire rope isolator 2 .

[0034] Working principle: the fan base 1 of the present invention increases the first-order natural frequency of the fan base 1 by improving the stiffness characteristics. The wire rope vibration isolator 2 reduces the first-order natural frequency of the fan base 1 and improves the vibration isolation efficiency of the fan base 1 .

[0035] Further, the modal vibration data of the model is obtained by performing SOLIDWORKS modeling on the existing fan base according to the actual state of the on-site fan in the factory and mine, and using the finite elemen...

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Abstract

The invention particularly relates to a fan base. The rigidity of the fan base is improved by diagnosing faults existing in an existing fan base according to modal shape data of a model; and a steel wire rope isolator is arranged on the fan base. According to the fan base, fan vibration is effectively isolated and reduced, and the running reliability of the fan is improved.

Description

technical field [0001] The invention relates to the technical field of fan control in nuclear power plants, in particular to a fan base, fan overall equipment and a fan vibration control method. Background technique [0002] In the fan operating in nuclear power plants, the frequent failure of the fan is in the form of vibration exceeding the standard (flexible connection vibration standard ≤ 5.5mm / s). After analysis, it is considered that the rigidity of the fan base is not enough, and the rubber vibration isolator of the fan is easy to age , The vibration isolation performance is reduced. According to the calculation of the existing overall equipment weight and the stiffness of the rubber vibration isolator, the natural frequency of the system is about 11Hz. The frequency is too high, and the vibration isolation effect is not ideal. Moreover, the location of the rubber vibration isolator is obviously unreasonable, and there is an eccentric phenomenon. When vibrating, vibra...

Claims

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Application Information

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IPC IPC(8): F04D25/08F04D29/00F04D29/60F04D29/66
CPCF04D25/08F04D29/002F04D29/601F04D29/668
Inventor 苑景凯曾卫新黄贤华曾博文张伟强王恒张永锋
Owner CNNC NUCLEAR POWER OPERATION MANAGEMENT
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