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Dynamic balance test method of vertical pump based on virtual sensor

A technology of virtual sensor and test method, which is applied in the field of vertical pump dynamic balance test based on virtual sensor, can solve the problems of not being able to meet the needs of dynamic balance test well, and achieve the effect of reducing difficulty, improving efficiency and accuracy

Active Publication Date: 2020-02-07
ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method cannot well meet the dynamic balance test requirements of vertical pumps, which have dense modes and require frequency conversion to operate in this range.

Method used

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  • Dynamic balance test method of vertical pump based on virtual sensor
  • Dynamic balance test method of vertical pump based on virtual sensor
  • Dynamic balance test method of vertical pump based on virtual sensor

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Embodiment Construction

[0050] Below, the present invention will be further described in conjunction with the accompanying drawings.

[0051] Due to the vibration of the vertical pump in the two orthogonal directions has a certain coupling. During the speed-up process, it will pass through two resonance speed zones. In the two resonance speed ranges, the vibration changes are more complicated, such as Figure 4 shown. At the same time, this type of system has the characteristics of approximately symmetric cross stiffness. For such vertical pumps, a coordinate rotation based vibration decoupling method is provided. The principal coordinate direction is found by the coordinate transformation method, so that the force in this direction only produces vibration in this direction, thereby reducing the complexity of vibration analysis and dynamic balance.

[0052] by figure 2The vertical pump shown with the cross stiffness term is analyzed as an example. Neglecting the damping effect, assuming that th...

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Abstract

The invention discloses a vertical pumping balance test method based on a virtual sensor. The method includes steps: the virtual sensor is arranged at a position having a certain included angle with an installation angle of a physical sensor, a vibration value of the virtual sensor is calculated through a coordinate conversion formula and a vibration value measured by the physical sensor, the coupling degree of vibration measured by the virtual sensor in two directions is obtained, and the rigidity main axis direction is determined according to a coupling degree minimum principle. The virtualsensor is arranged in the rigidity main axis direction, and the vibration tested by the virtual sensor in two directions is decoupled to the maximum. After decoupling, in a vertical pumping variable-frequency operation process, the vibration tested by the virtual sensor changes with the rotating speed, the rule is similar to a single-degree-of-freedom system, a dynamic balance test can be conducted based on data tested by the virtual sensor of a vibration large side, the difficulty of the dynamic balance test is reduced, and the accuracy of the dynamic balance test is improved.

Description

technical field [0001] The invention relates to a vertical pump dynamic balance test method, in particular to a vertical pump dynamic balance test method based on a virtual sensor. Background technique [0002] Vertical pumps are important equipment in power plants, including condensate pumps and circulating water pumps. In order to save energy, many power plants have implemented frequency conversion transformation for vertical pumps, changing the throttling adjustment of the original constant speed operation to the speed adjustment of frequency conversion operation. The frequency conversion adjustment range is 60%-100%, and a good energy saving effect has been achieved. When the vertical pump is running at a constant speed before the frequency conversion transformation, the working speed is higher than the system resonance speed, avoiding the resonance area, and the vibration is small. After the frequency conversion transformation of the vertical pump, the working speed fe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M1/16
CPCG01M1/16
Inventor 梁超路鹏王旭阳林翔周浩然许雷
Owner ELECTRIC POWER SCI RES INST OF STATE GRID XINJIANG ELECTRIC POWER
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