Permanent magnet sealed drive device
A sealed transmission, permanent magnet technology, applied in electromechanical devices, permanent magnet clutches/brakes, electric components, etc., can solve problems such as eddy current loss, and achieve the effect of simplifying the structure, eliminating the cooling cycle system, and improving the transmission efficiency.
Pending Publication Date: 2018-08-10
浙江长城搅拌设备股份有限公司
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Problems solved by technology
This arrangement of magnets makes the magnetic closed circuit formed on the ring surface perpendicular to the axis. During operation, an induced electromotive force appears on the metal sealing spacer and forms a closed circuit, which will form an induced current, thus causing eddy current loss.
Method used
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[0022] As an embodiment of the permanent magnet sealing transmission device of the present invention, a non-magnetic stainless steel sealing isolation sleeve 4 is selected to be located between the outer permanent magnet 2 made of NdFeB material and the inner permanent magnet 3 made of NdFeB material and sealed to the lower part The upper opening flange of the sealed container, at the same time, the frame 5 and the stainless steel sealing spacer 4 are also positioned and installed on the upper opening flange of the lower sealed container. The rotor assembly is connected to the output shaft of the motor and runs with the motor. The inner permanent magnet 3 is connected to the rotating shaft in the container through the intermediate component inner rotor assembly and can drive it to rotate. The positive outer permanent magnet 21 and the reverse outer The permanent magnets 22 are respectively installed and positioned in the same direction and with a gap in the circumferential dire...
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The invention discloses a permanent magnet sealed drive device for eliminating the loss of the eddy current through the design of a magnetic circuit. Forward outer permanent magnets (21) and reverse outer permanent magnets (22) are circumferentially installed and positioned in the same direction to form a cylindrical surface, wherein a gap is reserved between two permanent magnets respectively. The forward outer permanent magnets (21) and the reverse outer permanent magnets (22) are axially alternated and continuously positioned. Inner permanent magnets (3), opposite to outer permanent magnets(2), are positioned corresponding to the outer permanent magnets (2), wherein the polarities of the inner permanent magnets (3) are opposite to the polarities of the outer permanent magnets (2). Based on the above design, the loss of the eddy current on a metal-sealed isolation sleeve can be eliminated. Meanwhile, the cooling circulation system of the permanent magnet sealed drive device is omitted, and the structure is simplified.
Description
technical field [0001] The invention belongs to the technical field of permanent magnet sealing transmission, in particular, in the permanent magnet sealing transmission device, the eddy current loss on the metal sealing isolation sleeve is eliminated. Background technique [0002] At present, the permanent magnet seal drive is the only effective way to achieve zero leakage of the drive shaft seal, but the eddy current loss on the metal seal spacer has become a bottleneck obstacle for its wide use and high-power design. In the prior art, the positive external permanent magnets and the reverse external permanent magnets placed on the cylindrical surface are installed and positioned continuously in the same direction in the axial direction, and the positive external permanent magnets and the reverse external permanent magnets alternate in the circumferential direction Continuously installed and positioned, the inner permanent magnet opposite to the outer permanent magnet corre...
Claims
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CPCH02K49/106
Inventor 苏杨王洪群虞淑瑶周国忠谢明辉林苏奔荆万仓徐奔驰孟绳续吴亮邹晨黄志坚
Owner 浙江长城搅拌设备股份有限公司