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Equivalent stiffness-based dynamic SSS clutch modeling method

A technology of dynamic modeling and equivalent stiffness, applied in instruments, special data processing applications, electrical and digital data processing, etc., can solve the problems of shafting vibration analysis difficulties, equipment damage, and obstacles to the production of units, and can solve the problems of shafting vibration analysis. Vibration calculation slow effect

Active Publication Date: 2017-10-17
XI AN JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the new structure will inevitably have a great impact on the vibration of the shafting system. Many facts have proved that the serious damage to the equipment due to the design defect of the shafting system has brought great obstacles to the commissioning of the unit and delayed the commissioning period.
Due to the coupling effect of the SSS clutch gear, the shafting vibration produces new features, and there are great difficulties in the shafting vibration analysis based on the existing finite element analysis software

Method used

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  • Equivalent stiffness-based dynamic SSS clutch modeling method
  • Equivalent stiffness-based dynamic SSS clutch modeling method
  • Equivalent stiffness-based dynamic SSS clutch modeling method

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Embodiment Construction

[0066] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0067] 1) see figure 1 , the present invention aims to establish a SSS clutch dynamics modeling method based on the equivalent stiffness method, which lays the foundation for the shafting vibration analysis of the combined cycle unit with the SSS clutch. Based on this purpose, a method based on the equivalent stiffness method is designed Overall flowchart of the SSS clutch dynamics modeling method.

[0068] 2) see figure 2 , this embodiment considers the influence of the bearings at both ends of the SSS clutch, and the research model is the shaft section between the bearings 7 and 8 at both ends of the SSS clutch, including: input shaft 1, intermediate shaft 2, output shaft 3, high and medium pressure rotor 4 , Low pressure rotor 5, bearing 6 and bearing 7. First, the SSS clutch is introduced. The SSS clutch consists of input shaft 1, int...

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Abstract

The invention discloses an equivalent stiffness-based dynamic SSS clutch modeling method. The method comprises the following steps of: carrying out three-dimensional modeling and finite element mesh generation on an SSS clutch so as to obtain a finite element model of the SSS clutch, applying a boundary condition on the finite element model of the SSS clutch to calculate lateral displacement of each position point on an axis position of the SSS clutch, and drawing a deflection curve; and keeping the main three-dimensional model of the SSS clutch unchanged, removing engaging teeth of an intermediate shaft and an output shaft, selecting corresponding nodes on the outer side surface of the intermediate shaft and the inner side surface of the output shaft to establish a matrix unit, setting a same boundary condition to carry out finite element calculation, optimizing stiffness elements in the matrix unit by adoption of an optimization algorithm until a deflection curve fitting degree achieves a convergence standard, and outputting each element of the matrix unit. According to the method, a dynamic model of the SSS clutch is established: gear teeth are removed on the basis of keeping the main body of the SSS clutch unchanged, so as to connect the intermediate shaft and the output shaft via the optimized matrix unit and then replace gear teeth engaging contact.

Description

Technical field: [0001] The invention relates to a dynamic modeling method of an SSS clutch based on an equivalent stiffness method. Background technique: [0002] Since the end of the 20th century, power generation technology has become increasingly mature, major changes have taken place in the structure of energy resources around the world, and people's requirements for environmental protection have also increased. The obvious advantages such as short length, small footprint, and minimal environmental pollution have become more and more important in the power system, and gradually replacing coal-fired heating units has become the main development trend. [0003] The shafting arrangement of the conventional combined cycle unit is: high and medium pressure cylinder - low pressure cylinder - generator, while the new gas-steam combined cycle unit is equipped with an SSS clutch with synchronous self-shifting function between the high and medium pressure cylinder and the low pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 谢永慧杜秋晚宋亚军黄葆华
Owner XI AN JIAOTONG UNIV
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