Grounding type nonlinear energy trap for restraining rotator system vibration

A nonlinear energy trap, rotor technology, applied in the direction of rotational vibration suppression, vibration suppression adjustment, spring/shock absorber, etc., can solve the problems of narrow vibration suppression frequency band, complex structure, low applicability, etc. The effect of high-efficiency vibration energy absorption capacity

Active Publication Date: 2018-11-16
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, passive vibration absorbers are widely used in the field of vibration suppression of rotating machinery. Its stru...

Method used

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  • Grounding type nonlinear energy trap for restraining rotator system vibration
  • Grounding type nonlinear energy trap for restraining rotator system vibration
  • Grounding type nonlinear energy trap for restraining rotator system vibration

Examples

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Embodiment Construction

[0040] Attached below Figure 1-9 , 10(a), 10(b), and 10(c), and give examples to further describe the nonlinear energy well of the present invention in detail.

[0041] A grounded nonlinear energy sink for suppressing vibration of a rotor system is applied to a specific node of a specific rotor system, including a nonlinear energy sink body, a fixed frame 2 , a frame 14 and a shaft end support 15 . It includes a bearing assembly, a connecting assembly, a vibrator-absorbing mass block 5 and a fixing ring 12. Mounting frame 2 see Figure 7 . The piecewise linear stiffness of the nonlinear energy well for vibration suppression of this rotor system fits the action mechanism of the nonlinear cubic stiffness and the action mechanism of the nonlinear energy well mechanism, see Figure 8 . The vibration suppression effect diagram of the rotor system under the condition that the nonlinear energy well of the present invention has three clearance fits, see comprehensively Figure 9...

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Abstract

The invention discloses a grounding type nonlinear energy trap for restraining rotator system vibration. The grounding type nonlinear energy trap comprises a grounding type nonlinear energy trap bodyand a fixed frame, wherein the grounding type nonlinear energy trap body comprises a fixed ring, a connection component, an oscillator mass absorption block, a weak-rigidity spring and a bearing component; the bearing component is matched with a shaft and comprises a shaft sleeve, a bearing and a bearing sleeve; the weak-rigidity spring is matched with the bearing component and the oscillator massabsorption block; the connection component is matched with the fixed ring and the oscillator mass absorption block and comprises segmented linear rigidity rods; clearance holes with different diameters are formed on a same circumference of the oscillator mass absorption block and are in clearance fit with the segmented linear rigidity rods to form segmented linear rigidities and fit nonlinear cubic rigidities; and the fixed frame is fixed on a rack to embody the grounding performance of the grounding type nonlinear energy trap. The grounding type nonlinear energy trap is capable of effectively restricting the vibration of wide bands of rotor systems and belongs to the field of vibration noise control. The grounding type nonlinear energy trap is simple and compact in overall structure, small in additional mass, high in reliability, convenient to use and free of external energy sources.

Description

technical field [0001] The invention relates to the technical field of vibration and noise control, in particular to a grounded 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] Vibration is a typical hazard to the safe operation of rotating machinery. For multi-span rotors, the operating speed is usually above the first-order critical speed. It must pass through the first-order critical speed during the start and stop phases. At this time, strong resonance will occur, which seriously affects the performance of the unit. Stable operation. With the continuous efforts of the "2025 Plan" of the national equipment manufacturing industry, higher and higher requirements are put forward for the efficient, reliable and long-term stable operation of rotating machinery. Therefore, the efficient control of the vibration of its rotor sy...

Claims

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Application Information

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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
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