Heavy-duty permanent magnetic attraction bearing with assembled permanent magnetic ring structure
A permanent magnet ring, permanent magnet technology, used in bearings, shafts and bearings, mechanical equipment and other directions
Inactive Publication Date: 2014-06-18
TSINGHUA UNIV +1
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- Description
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- Application Information
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Problems solved by technology
At present, limited by the specifications of the magnetizer in China, it is difficult for the outer diameter of the magnetic ring to be larger than 120mm, so the permanent magnetic suction bearing of the prior art cannot be used for heavy machinery
Method used
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Embodiment Construction
[0027] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.
[0028] figure 1 It is a schematic diagram of a permanent magnetic suction bearing-rolling bearing hybrid bearing shaft system. The heavy permanent magnetic suction bearing with an assembled permanent magnetic ring structure is composed of a permanent magnetic static ring assembly 1 and a magnetically conductive moving ring 2. The magnetically conductive moving ring 2 is vertically arranged The shaft on the upper part of the rotor 4 is coaxially fixed, and the upper and lower ends of the shaft of the rotor 4 respectively form a rotational connection with the machine casing through the upper bearing 3 and the lower bearing 5, both of which are rolling bearings. The ring 2 is fixed on the machine shell, the permanent magnet stationary ring assembly 1 is coaxial with the magnetically conductive moving ring 2 and sleeved on the shaft on the upper part of...
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The invention belongs to the technical field of magnetic suspension bearings, and relates to a heavy-duty permanent magnetic attraction bearing with an assembled permanent magnetic ring structure. The bearing consists of a permanent magnetic fixed ring component and a magnetic conducting moving ring, wherein an assembled permanent magnetic ring in the permanent magnetic fixed ring component is a round magnetic ring formed by assembling fan-shaped permanent magnets, is adsorbed on a stable thin steel disc and is arranged in an isolating ring sleeve; a permanent magnetic assembled ring component is adsorbed on a magnetic conducting fixed ring and locked by a fixing screw; the magnetic conducting moving ring is arranged on a shaft on the upper part of a rotor in a threaded connection mode; the permanent magnetic fixed ring component is arranged above the magnetic conducting moving ring; an axial clearance is formed between the permanent magnetic fixed ring component and the magnetic conducting moving ring; and 90 to 95 percent of weight of the rotor is borne by the permanent magnetic attraction of the permanent magnetic fixed ring component and the magnetic conducting moving ring under the action of a high-intensity magnetic field generated by the assembled permanent magnetic ring. A large-size permanent magnetic ring is formed by combining the fan-shaped permanent magnets, so that the size limitation of a magnetizer is broken, the permanent magnetic ring of the heavy-duty permanent magnetic bearing is manufactured, and the bearing is suitable for heavy-duty high-speed rotating shaft systems such as a high-speed centrifuge, a molecular pump and a flywheel shaft system.
Description
technical field [0001] The invention belongs to the technical field of magnetic suspension bearings, in particular to a heavy-duty permanent magnetic suction bearing with an assembled permanent magnetic ring structure. Background technique [0002] There are many rotating machines with vertical shafts in the industry, such as centrifuges, molecular pumps, flywheel energy storage power supply units, etc. In order to achieve high-speed rotating support, reduce bearing loss and improve bearing life, magnetic suspension bearings are widely used. Magnetic suspension bearings mainly include permanent magnetic suspension bearings, electromagnetic suspension bearings and hybrid magnetic suspension bearings. [0003] Permanent magnetic suspension bearings generally adopt a ring structure, consisting of a static ring and a moving ring. The central axes of the two rings coincide with the rotor axis of the rotating machine. There is a certain axial gap between the two rings. The static...
Claims
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IPC IPC(8): F16C32/04
Inventor 戴兴建李胜忠秦晓峰张玉甫雷小红范军田中张东涛陈刚李志明
Owner TSINGHUA UNIV