A Second-Order Nonlinear Energy Trap for Suppressing Rotor System Vibration

A nonlinear energy well and rotor technology, applied in the direction of rotation vibration suppression, vibration suppression adjustment, spring/shock absorber, etc., can solve the problems of large application limitations, narrow vibration suppression frequency band, complex structure, etc., and achieve variable parameters , Enhanced vibration suppression effect and increased flexibility

Active Publication Date: 2020-09-11
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The passive vibration absorber has a simple structure and does not require an energy source. It is currently the main way to suppress the vibration of rotating machinery, but its vibration suppression frequency band is narrow, and its practical application is limited. Additional adjustment parts, resulting in low applicability

Method used

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  • A Second-Order Nonlinear Energy Trap for Suppressing Rotor System Vibration
  • A Second-Order Nonlinear Energy Trap for Suppressing Rotor System Vibration
  • A Second-Order Nonlinear Energy Trap for Suppressing Rotor System Vibration

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Embodiment Construction

[0031] Attached below Figure 1-10 , and give examples to further describe in detail the secondary nonlinear energy well for vibration suppression of the rotor system of the present invention.

[0032] The disk 9 and the shaft 17 are assembled into a rotor system, and the shaft 17 is fixed on the outer frame 18 through the shaft end support 19;

[0033] The support assembly includes a bearing 8, a support disc 10 and a shaft sleeve 11. The bearing 8 is fixed in the support disc 10. The function of the shaft sleeve 11 is to prevent the axial movement of the nonlinear energy well body. The support disc 10 passes through the primary connection assembly Connect with the primary vibrator-absorbing mass block 15;

[0034] The connecting holes on the inner circumference of the first-level vibrator-absorbing mass block 15 are matched and connected with the two first-level connecting rods 12; the gap holes and the four first-level segmented linear rods 13 form clearance fits; the hole...

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Abstract

The invention discloses a two-stage nonlinear energy trap for suppressing the vibration of a rotor system, and belongs to the field of vibration noise control. The two-stage nonlinear energy trap comprises a nonlinear energy trap body and a fixing device. The nonlinear energy trap body comprises a supporting assembly, a first-stage connecting assembly, a second-stage connecting assembly, a first-stage vibration absorbing sub-mass block and a second-stage vibration absorbing sub-mass block. The supporting assembly comprises a bearing, a support and a shaft sleeve; the two stages of vibration absorbing sub-mass blocks are provided with connecting holes and clearance holes and cooperate with the two stages of connecting assemblies; the first-stage and second-stage connecting assemblies comprise first-stage and second-stage connecting rods and first-stage and second-stage piecewise linear rods, clearance fit between the two stages of piecewise linear rods and the two stages of vibration absorbing sub-mass blocks form serial piecewise linear rigidity, and by fitting nonlinear cubic rigidity, the two-stage nonlinear energy trap is formed. The fixing device comprises bolts, fixing frames,springs, first connecting pieces and second connecting pieces. The two-stage nonlinear energy trap can effectively suppress the broadband vibration of the rotor system, and is compact in overall structure, convenient to use and high in reliability.

Description

technical field [0001] The invention relates to the technical field of vibration and noise control, in particular to a secondary nonlinear energy well for suppressing the vibration of a rotor system, which is used for vibration suppression of the rotor system, a core component of a rotating machine. Background technique [0002] As the core component of rotating machinery such as large centrifugal compressors and heavy-duty gas turbines, the rotor system’s operating speed is usually above the first-order critical speed. It must pass through the critical speed during the start-up and stop stages, and strong resonance occurs at the same time, which seriously affects the stable operation of the unit. . Therefore, efficient and reliable vibration control of the rotor system of rotating machinery is particularly important, and it is an urgent problem to be solved. [0003] Adding dynamic vibration absorbers is a common method of vibration suppression. It can significantly reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F15/121F16F15/14
CPCF16F15/121F16F15/14
Inventor 姚红良曹焱博刘帅丁志雨李文龙闻邦椿
Owner NORTHEASTERN UNIV LIAONING
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