Novel-structural impeller capable of performing dynamic balance correction
A technology of balance correction, oil impeller, applied in the direction of machines/engines, liquid fuel engines, components of pumping devices for elastic fluids, etc., which can solve irreducible failures, balance correction, reprocessing parts, long analysis, disassembly, Transshipment, processing time and other issues, to achieve the effect of improving maintenance efficiency and alleviating negative effects
Inactive Publication Date: 2014-11-19
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology
[0002] The structure of a reactor coolant pump shaft system rotor component dynamic balance check for a second-generation plus improved pressurized water reactor nuclear power plant with a million-kilowatt class is as follows: figure 1 As shown, 1 in the figure is the oil impeller, and this structure cannot perform balance correction when there is an irreversible excessive unbalance on the I surface
[0003] At present, if this happens, you can only choose to apply for use or reprocess parts. Since each part is finished and assembled after passing the balance of the monomer, reprocessing parts requires a long analysis , dismantling, transshipment, processing and other time, during which manpower, material resources, and financial resources were wasted, which had a non-negligible impact on the project progress. Due to the particularity of the working environment, with the long-term operation of the pump shaft, the unbalance will inevitably form a centrifugal moment of inertia, which will cause risks to the service operation of the main pump including the oil sealing performance
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[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0023] When designing the oil impeller of the new structure of the present invention, at first it will be determined according to many pumps and multiple tests that the unbalanced amount of the I plane exceeds the standard numerical results, and form statistical data; then consider the method of "weight gain" to carry out balance correction and determine the counterweight The individual block mass of the block. In the present embodiment, according to the statistical data analysis of 8 tests of 4 sets of pumps, the unbalanced value exceeding the standard on the I plane basically remains within 100g, because such as figure 1 All the parts at the A-end of the middle support have been finished and have undergone single-body balance correction. Therefore, it is more appropriate to adopt the "weight gain" method for component balance correction and determin...
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The invention relates to a novel-structural impeller capable of performing dynamic balance correction. A circumferential groove concentric to an impeller body is formed in one side of the end face of the inlet of the impeller body, and a counterweight is arranged in the circumferential groove, is provided with a screwed through hole and is fixed into the proper position in the circumferential groove through a screw. When the unbalance exceeds the standard, counterweight balance correction is performed on a dynamic balance machine till quantification directly, counterweight can be performed on the impeller flexibly so as to relief the negative influence on a main pump by other part countershafts since the unbalance exists, and the main pump unit repairing efficiency is improved accordingly.
Description
technical field [0001] The invention relates to a shaft system rotor component of a reactor coolant pump, in particular to an oil impeller with a new structure capable of dynamic balance correction. Background technique [0002] The structure of a reactor coolant pump shaft system rotor component dynamic balance check for a second-generation plus improved pressurized water reactor nuclear power plant with a million-kilowatt class is as follows: figure 1 As shown, 1 in the figure is the oil impeller, and this structure cannot perform balance correction when there is an irreversible excessive unbalance on the I surface. [0003] At present, if this happens, you can only choose to apply for use or reprocess parts. Since each part is finished and assembled after passing the balance of the monomer, reprocessing parts requires a long analysis , dismantling, transshipment, processing and other time, during which manpower, material resources, and financial resources were wasted, wh...
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IPC IPC(8): F04D29/18F04D29/66
Inventor 康春雨张增强李明林贞李璟
Owner CHINA NUCLEAR POWER ENG CO LTD