Method for preventing vibration in pumps

A technology of mechanical vibration and centrifugal pump, which is applied to the components of pumping device for elastic fluid, pump, pump control and other directions to achieve the effect of reducing mechanical vibration

Pending Publication Date: 2021-11-12
KSB AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is a particularly unfavorable situation when the rotational frequency of the impeller, i.e. the set pump speed, falls on the natural frequency of the built-in pump or corresponds to an integer multiple of this natural frequency

Method used

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  • Method for preventing vibration in pumps
  • Method for preventing vibration in pumps
  • Method for preventing vibration in pumps

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Embodiment Construction

[0028] The invention according to the present application describes a method for the targeted avoidance of unwanted vibration amplification in the case of resonance by means of a frequency converter during the operation of a pump, in particular a solids pump, a waste water pump or other supply pumps. The basis for the targeted avoidance of these resonances is that such resonance situations must first be detected by the pump controller, but as far as possible no special sensors, such as acceleration sensors, need to be added to the pump. However, nothing prevents the pump from being equipped with additional sensors, for example acceleration sensors, whereby the accuracy of the method can optionally be increased.

[0029] Since the mechanical vibrations are the result of the interaction of the constructional structure with the electric motor force, these mechanical vibrations can also be recognized as a superposition of the drive current of the pump current of the pump drive. Si...

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Abstract

The invention relates to a method for preventing or reducing mechanical vibrations of a pump, in particular a centrifugal pump, during pump operation, wherein a frequency converter and a pump control are provided and the pump control detects at least one signal of a pump operation parameter and investigates signal fluctuations in order to detect mechanical vibrations occurring in the pump, and modifies the pump speed by means of the frequency converter in order to reduce a vibration detected.

Description

technical field [0001] The invention relates to a method for avoiding or reducing mechanical vibrations during the operation of a pump, in particular a centrifugal pump. Background technique [0002] Mechanical vibrations in centrifugal pumps lead to increased wear and undesired noise generation during operation. The cause of the vibration can be various. For example externally excited vibrations due to the rotation of the pump impeller or free vibrations due to the natural frequency of the built-in pump may be the cause. [0003] Free vibrations occur especially in solid pumps. Solids pumps are centrifugal pumps for pumping media with highly abrasive solids fractions, such as suspensions of slag, coal or ores in the mining industry. Occasionally, the pumped medium may also contain stones or other rigid elements which, during pump operation, may generate impacts when hitting the pump structure, which impacts lead to the excitation of free vibrations of the pump. This eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D15/00F04D29/66
CPCF04D15/0066F04D15/0088F04D29/669
Inventor M·埃克尔J·舒勒勒
Owner KSB AG
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