Mixing dynamic balance method for crossing outer rotor
An external rotor, balanced technology, applied in the direction of electric components, control mechanical energy, electrical components, etc., can solve complex and changeable, process dangerous, complex and other problems
Inactive Publication Date: 2012-07-04
XI AN JIAOTONG UNIV
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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
Method used
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Embodiment Construction
[0058] In order to verify the superiority of the hybrid dynamic balancing method across the outer rotor of the present invention, the present invention will be further described in detail below with reference to the embodiments.
[0059] The hybrid dynamic balancing method across the outer rotor of the present invention is applied to the steam turbine shaft of a petrochemical compressor unit in China, as well as the experimental bench structure based on the high, medium and low pressure rotors of the steam turbine generator set, and the hood and other structures. The ability of the hybrid balance of the present invention can be verified.
[0060] The specific description of the hybrid dynamic balancing method across the outer rotor is as follows:
[0061] Step 1: Select the appropriate balance surface: the coupling is the outrigger end of the two adjacent rotors. In the unit structure on site, the coupling is generally exposed outside the unit or can be exposed by simply openi...
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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 outthe 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 rotor across an outer rotor, that is, a rotor with an overhanging end. This method can be used to solve the balance problem across the outer rotor without removing the cover of the unit. Background technique [0002] Turbomachinery is a rotating machine that converts the energy contained in the fluid working medium into mechanical work. It is widely used in power stations, aviation, chemical and other sectors of the national economy, 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 single unit capacity or adopt the combined cycle technology, which means two aspects: (1) The rotor speed increases, generally in the first order Even working at a speed above the second-...
Claims
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IPC IPC(8): H02K7/04
Inventor 温广瑞田利凯张西宁臧廷朋吴婷婷
Owner XI AN JIAOTONG UNIV