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Shafting load preadjusting method of metered spring base

A technology of pre-adjustment and bearing load, which is applied in the field of pre-adjustment of shafting load included in the spring foundation, can solve the problems of lagging spring foundation research and immature technology mastery

Inactive Publication Date: 2013-09-18
JIANGSU NUCLEAR POWER CORP
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  • Claims
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Problems solved by technology

However, so far, the research on spring foundation in our country is relatively lagging behind, and its technology is not very mature, and there is no specification for the design, installation and use of spring foundation for turbogenerator units

Method used

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  • Shafting load preadjusting method of metered spring base
  • Shafting load preadjusting method of metered spring base
  • Shafting load preadjusting method of metered spring base

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0029] The present invention comprises the following steps in turn:

[0030] (1) Collection of rigid foundation bearing elevation h i , and the stiffness K of the spring foundation corresponding to the bearing i弹簧 , i=1, 2...I, I is the number of bearings in the shafting;

[0031] (2) Using the transfer matrix method, the bearing load under the rigid foundation and the constant speed condition is obtained with elevation h i The relationship between;

[0032] W i ( 1 ) = f ( h i ) ;

[0033] (3) Get the stretching amount of the spring

[0034]

[0035] (4) Using the finite element method, by solving the Reynolds equation, the ...

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Abstract

The invention relates to a shafting load preadjusting method of a metered spring base. The method sequentially comprises the following steps of (1) collecting the elevation hi of a rigid base bearing and a spring with the rigid Ki of a spring base corresponding to the bearing; (2) obtaining a relation between a bearing load and the elevation hi at a constant speed under the rigid base by adopting a transfer matrix method; (3) obtaining the stroke of the spring; (4) solving a reynolds equation by adopting a finite element method so as to obtain the floating amount of a shaft neck under a bearing load condition; (5) obtaining the elevation of the bearing; (6) replacing hi by use of the elevation of the bearing according to the f(hi) obtained in the step (2) so as to obtain an iterated bearing load; (7) returning to the steps (3)-(7) in due time; (8) obtaining the real load and practical elevation of the bearing at a constant speed under the spring base; and (9) obtaining the preadjusting amount delta of the elevation of the bearing. The method provided by the invention can be used for effectively improving the stability of the bearing and reducing the low-frequency vibration of the bearing and is wide in application prospect.

Description

technical field [0001] The invention relates to a shafting load pre-adjustment method including a spring foundation, in particular to a shafting load pre-adjusting method including a spring foundation in the technical field of fault diagnosis and treatment of power machinery engineering power plant equipment. Background technique [0002] With the increase of power demand and the development of the manufacturing industry, the capacity of a single unit of a turbo-generator unit is getting larger and larger. The support column of the conventional foundation bears the dynamic load caused by the unbalanced residual mass of the shaft system and the static load of the unit body. Also getting bigger and bigger. In order to output the same power, the nuclear power steam turbine generator set that uses saturated steam to do work requires a much larger flow rate than conventional power plants, which increases the load on the supporting columns. If a conventional foundation is used, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/44E02D33/00
Inventor 黄潜张卫军石岭张福海何国安张学延张勇姜剑峰
Owner JIANGSU NUCLEAR POWER CORP
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