Magnetic damper with floating ring
A technology of magnetic damper and floating ring, applied in the direction of magnetic spring, spring/shock absorber, spring, etc., can solve the problems of rotor system bistable response, low frequency precession, rotor-damper system damage, etc.
Active Publication Date: 2017-01-25
JIANGSU UNIV OF TECH
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Problems solved by technology
[0003] The stiffness and damping provided by a common squeeze film damper can be expressed as (taking the short bearing approximation theory as an example): stiffness coefficient, damping coefficient. From the formula, it can be seen that the stiffness and damping coefficient of the damper vary with the rotor The increase of eccentricity ε (or eccentric distance) presents a strong nonlinear characteristic, which will cause problems such as bistable response and low-frequency precession of the rotor system, so that the rotor-damper system is damaged
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[0021] In order to make the content of the present invention more clearly understood, the present invention will be further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.
[0022] like figure 1 As shown, a magnetic damper with a floating ring, which includes:
[0023] shell 7;
[0024] Inner journal, the inner journal includes an inner ring and a radially swingable fixed bracket 8, the inner ring is fixedly mounted on the outer wall of the fixed bracket 8, and the fixed bracket 8 is used to rotatably support the rotor shaft system 3 through the rolling bearing 2, And one end of the fixed bracket 8 is fixed by the elastic shaft 4 mounted on it, and the inner ring has a plurality of inner conductive and magnetically insulating rings 10 and a plurality of inner magnetic rings 1, and the inner conductive and magnetically insulating rings 10 and the inner magnetic rings 1 are in the inner ring The axial direction is alte...
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The invention discloses a magnetic damper with a floating magnetic ring. The magnetic damper comprises a casing, an inner shaft neck and the floating magnetic ring, wherein the inner shaft neck comprises an inner ring and a fixing support capable of swinging radially, the inner ring is fixedly arranged on the outer wall of the fixing support, the inside of the fixed support is used for supporting a rotor shaft system rotatably, and one end of the fixing support is fixed through an elastic shaft arranged on the fixing support. The inner ring is provided with a plurality of inner conductive magnetic insulation rings and a plurality of inner magnetic rings, and the inner conductive magnetic insulation rings and the inner magnetic rings are arranged parallelly in an alternative mode in the axial direction of the inner ring. The floating ring and the inner ring are arranged axially, the floating magnetic ring is arranged around the inner ring, the floating magnetic ring is provided with a plurality of floating conductive magnetic insulation rings and a plurality of floating magnetic rings, and the floating conductive magnetic insulation rings and the floating magnetic rings are arranged in an alternative mode in the axial direction of the floating magnetic ring. By means of the magnetic damper with the floating magnetic ring, the phenomenon of strong nonlinear characteristics of the rigidness and damp caused by increase of the eccentricity ratio of a rotor can be improved, and the magnetic damper is suitable for working under high-speed working conditions.
Description
technical field [0001] The invention relates to a magnetic damper with a floating ring, which is a device for radially supporting and damping the rotor of a key component in a high-speed rotating machine (such as a centrifuge, a turbine, an energy storage flywheel, etc.), and belongs to equipment field of manufacturing technology. Background technique [0002] At present, in order to ensure the stable and efficient operation of the shaft system, it is often necessary to introduce a damper device into the shaft system in various high-speed rotating machines such as centrifuges, turbines, and energy storage flywheels. [0003] The stiffness and damping provided by a common squeeze film damper can be expressed as (taking the short bearing approximation theory as an example): stiffness coefficient, damping coefficient. From the formula, it can be seen that the stiffness and damping coefficient of the damper vary with the rotor The increase of eccentricity ε (or eccentric distan...
Claims
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IPC IPC(8): F16F6/00
CPCF16F6/00
Inventor 王洪昌
Owner JIANGSU UNIV OF TECH