Electric eddy-current damping device for rotary machine rotor

An eddy current damping, rotating machinery technology, applied in the direction of rotation vibration suppression, etc., can solve the problems of large size and weight of electromagnetic bearings, limited maximum operating speed, low system reliability, etc., to achieve short response time, easy power supply, volume small effect

Inactive Publication Date: 2005-04-27
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electromagnetic bearing needs to add an iron core to the rotating shaft, which greatly limits its maximum operating speed, and the volume and weight of the electromagnetic bearing are also relatively large; in addition, the electromagnetic bearing requires a comp

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  • Electric eddy-current damping device for rotary machine rotor
  • Electric eddy-current damping device for rotary machine rotor
  • Electric eddy-current damping device for rotary machine rotor

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] see figure 1 The eddy current damping device for rotating machinery of the present invention includes a ring magnet 2 coaxially sleeved on the rotor 6 from the inside to the outside, a magnetic isolation ring 10 and a casing 1, and there is a gap between the ring magnet 2 and the rotor 6. There is a gap, and the rotor 6 moves in the gap, and the inner circular surface of the ring magnet 2 is provided with a groove along the circumferential direction, and the coil 3 wound around the groove is arranged in the groove. The ring magnet 2 can be an integral structure, and for the convenience of processing, it can also be composed of a ring magnet 12 with an L-shaped cross section and a ring surface magnet 11. The casing 1 can be a magnetically conductive material, or a non-magnetically conductive material that separates the magnetic field. When the casing 1 is made of a n...

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Abstract

The electric eddy current damper of mechanical rotor operates on the principle that conductor moving in magnetic field will generate electric eddy current force proportional directly to the speed of the moving conductor. It includes mainly ring magnet and ring conductor coaxially on the rotor. Around the ring magnet surface, there is winding with some interval in between, and one of the ring magnet and the winding is fixed to the casing for producing non-rotation relative motion. When some current flows through the winding, a ring magnetic field will be established in the interval between the ring magnet and the ring conductor, and the object moving in the magnetic field will produce a damping force proportional to the motion speed to reduce vibration of the rotor system and raise the stability of the rotor system. Being simple and convenient, the electric eddy current damper may be applied in various kinds of mechanical rotor systems.

Description

technical field [0001] The invention relates to a damping device for a rotary machine rotor, in particular to an eddy current damping device for a rotary machine rotor. Background technique [0002] Rotary machinery is one of the key equipment of modern large-scale industry, and the high-speed rotating rotor is its core component. The vibration and stability of the rotor system have always been an important factor that confuses engineers and hinders product performance, reliability and service life. Therefore, it is of great significance to reduce the vibration of the rotor system and improve the stability of the system. [0003] For high-speed rotors supported on rolling bearings or sliding bearings, due to external interference or self-excitation, when the damping of the rotor system is insufficient, not only large vibrations but also instability will occur. In order to add necessary damping to the rotor system, elastic Damping support structure. The elastic damping sup...

Claims

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Application Information

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IPC IPC(8): F16F15/10F16F15/12
Inventor 祝长生
Owner ZHEJIANG UNIV
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