Calculation method of on-line dynamic balance of fan

Abstract

The invention provides a calculation method of on-line dynamic balance of a fan, and belongs to the technical field of dynamic balance of fans. The calculation method comprises the following steps of measuring an initial vibration vector, performing shutdown, adding a test weight, measuring a test weight vibration vector, dividing the weight of the test weight by the vibration magnitude of the test weight vibration vector to obtain a counterweight ratio of increase or decrease unit vibration quantity, determining the magnitude of a lag angle theta, measuring a target vibration vector of the same fan, obtaining the weight of a to-be-mounted balance weight by the vibration quantity in the target vibration vector, rotating the corresponding lag angle theta based on a phase angle in the target vibration vector to obtain a non-balance position point, performing rotation by 180 degrees at the non-balance position point to obtain a balance weight position point, and mounting the balance weight to the balance weight position point. The calculation method of the on-line dynamic balance of the fan does not require machine start or stop for many times; the time consumption of a dynamic balance experiment is low; and great manpower and material resources are saved.

Description

technical field [0001] The invention belongs to the technical field of fan dynamic balance, and more specifically relates to an online dynamic balance calculation method of a fan. Background technique [0002] In the metallurgical iron and steel sintering industry, no matter flat firing or belt firing, the flue gas extractor is always the heart of sintering, and whether its operation is normal is the key to whether the sintering can be produced normally. The temperature at which the flue gas enters the hood and the dust content of the flue gas are important control points in production. When the intake air temperature is lower than 65 degrees, the humid hot flue gas and dust are easy to form wet mud and stick to the leaf surface. The dust in the hot flue gas above 65 degrees intensifies the erosion of the blades. No matter what temperature the hot flue gas is, it is easy to cause uneven weight of the blade surface, thereby aggravating the imbalance of the fan rotor. It is ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an online dynamic balance calculation method for fans, which aims to solve the problem that the traditional method needs to start and stop the machine multiple times, and it takes a lot of time to do the dynamic balance experiment, which seriously affects the production.

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