Mixing dynamic balance method for crossing outer rotor

Abstract

The invention discloses a mixing dynamic balance method for crossing an outer rotor, which comprises the steps: carrying out a dynamic balance work under the condition of covering by selecting a suitable balance surface crossing the outer rotor; utilizing a mixing dynamic balance method, i.e. a least-square influence coefficient balance method and a holographic dynamic balance technology, to calculate the balance adding weight, wherein the least-square influence coefficient balance method can enable the quadratic sum of the residual oscillation values of each measuring point to be minimum, and the holographic dynamic balance technology can combine a holographic spectrum principle and a flexible rotor dynamic balance technology; and fully utilizing the structure information and the vibration information of a set to enhance the precision and the efficiency of the dynamic balance on site. The mixing dynamic balance method for crossing the outer rotor can rapidly and effectively carry out the dynamic balance on the rotor and has the advantages of high speed and high accuracy.

Description

Technical field [0001] The invention belongs to the field of rotor dynamic balance, and relates to the research and application of the dynamic balance of a spanning outer rotor, that is, a rotor with an extended end. This method can be used to solve the balance problem of the outer rotor without removing the cover of the unit. Background technique [0002] Turbine machinery is a machine that converts the energy contained in the fluid working medium into mechanical work in rotating machinery. It is widely used in various sectors of the national economy such as power stations, aviation, and chemical industries, and is the main object of energy consumption. For large-scale steam turbine power generation equipment, the effective way to improve the efficiency of the unit is to increase the parameters and increase the capacity of a single unit or adopt a combined cycle technology, which means two aspects: (1) The rotor speed increases, generally in the first order Even working at spee...

AI Technical Summary

Problems solved by technology

Generally speaking, if the whole balancing process is relatively smooth, it takes an average of two start-ups. However, due to the complex and changeable on-site conditions, it takes multiple start-ups to complete the balancing work. In addition to the procedures such as opening the cover, it often takes several days. , then the direct economic loss to the enterprise will be hundreds or even tens of millions of yuan

And for some units, in order to prevent the rotor from bending during shutdown, the unit must be in the cranking state when the cover is opened and other processes, the process is dangerous and complicated

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