Direct-coupled magnetic suspension fan

A magnetic levitation and direct-connection technology, which is applied in the direction of electromechanical devices, mechanical equipment, and control of mechanical energy, can solve the problems of low speed, small pressure ratio, and low efficiency of the prime mover motor, and achieve long life of the fan, small starting current, and fewer components. Effect

Inactive Publication Date: 2014-07-23
BEIJING LIANGMING TONGCHUANG WATER TREATMENT EQUIP DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the current fans are powered by 50HZ AC power supply, the speed of the prime mover motor is low, causing the existing fans to work at low speeds, resulting in low efficiency, large volume, and small pressure ratio. In the case of high flow rate and long life, it cannot meet the needs of high-speed and stable operation. At present, centrifugal high-speed turbine refrigeration is in urgent need of high-speed fans.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 The permanent magnet rotor is axially distributed, and this embodiment is arranged vertically.

[0030] see figure 1 , the permanent magnet rotor 21 and the stator coil 22 are distributed in the axial direction, the permanent magnets of the permanent magnet rotor are arranged around the shaft according to the axial direction of the shaft, and the stator coils corresponding to the permanent magnet rotor are also arranged around the shaft according to the axial direction of the shaft. , that is, the permanent magnet rotor and the stator coil are both cylindrical; an armature 23 is provided on the other side of the stator coil corresponding to the permanent magnet rotor, or another permanent magnet rotor, and the armature or another permanent magnet rotor passes through the impeller. The body is fixedly connected with the shaft; the permanent magnet rotor 21 , the stator coil 22 and the armature 23 are placed in the cavity of the impeller 31 body. The impelle...

Embodiment 2

[0035] Embodiment 2 The permanent magnet rotor is radially distributed, and this embodiment is arranged vertically.

[0036] see figure 2 , the basic structure is similar to the embodiment 1, the special point is: the bearing adopts a magnetic suspension bearing, the magnetic suspension bearing is composed of an inner magnetic cylinder and an outer magnetic cylinder, the inner magnetic cylinder is fixedly installed on the shaft, and the outer magnetic cylinder is sleeved outside the inner magnetic cylinder and It is fixedly installed on the bracket, the inner diameter of the outer magnetic cylinder is larger than the outer diameter of the inner magnetic cylinder, and the adjacent surfaces of the inner magnetic cylinder and the outer magnetic cylinder are of the same polarity; The permanent magnet rotors are arranged according to the radial distribution of the shaft, and the corresponding stator coils are also arranged around the shaft according to the radial direction of the ...

Embodiment 3

[0041] see image 3 , the basic structure is similar to that of Embodiment 2, the special feature is that the stator coil is also in the shape of a flat disc, and an armature 23 is arranged on the other side of the stator coil corresponding to the permanent magnet rotor, and the armature is fixedly connected to the shaft.

[0042] The stator coil is also in the shape of a flat disk, so as to increase the torque and reduce the axial distance, so that the shafting works in a rigid state, reduces the critical effect, and increases the torque.

[0043] The experimental results show that the speed can reach more than 30000rpm. The air pressure ratio can reach more than 2.

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Abstract

The invention discloses a direct-coupled magnetic suspension fan. The direct-coupled magnetic suspension fan mainly comprises a shaft, a bearing, an impeller, a permanent magnet rotor, a stator coil and an impeller shell; the permanent magnet rotor, the shaft and the impeller are fixed and arranged in the impeller shell; a magnetic suspension group is axially mounted on the shaft, the bearing is a magnetic suspension bearing, the stator coil is arranged at the other side outside the impeller shell in a position corresponding to the permanent magnet rotor, the stator coil is coupled with the permanent magnet rotor, and then the structure forms a brushless and coreless direct-current motor; the brushless and coreless direct-current motor is matched with a brushless motor driver in use, and is low in starting current, free of iron loss, large in torque, high in power factor and low in grid impact, and furthermore, the motor efficiency is improved. The rotor is directly driven by the coil; as the rotor and the impeller as used, the use of a high-speed coupling is avoided and the cost is reduced, and the system efficiency is improved and the weight is reduced; the direct-coupled magnetic suspension fan has the advantages of few components and small volume; due to the adopted magnetic suspension bearing, the fan is longer in service life, and simple and compact in structure, and therefore, the gap of a high-speed magnetic suspension fan in China is supplied.

Description

technical field [0001] The invention relates to a fan, in particular to a fan with a magnetic suspension structure. It belongs to a branch of the field of aerodynamics - the field of fans. Background technique [0002] At present, most of the technical status of the fan is the working principle of using the motor as the motive force to drive the two-dimensional impeller to inhale and compress the air and then discharge it. Widely used in ventilation, smoke exhaust, sewage treatment, material transportation, and other fields. High-speed and high-pressure fans used in petrochemical, metallurgical, and nuclear industries are restricted by foreign countries. Drs Xiao Xiaojin and Yuan Xiuqian from Beihang University emphasized the development of HDM-driven high-speed fans in their research on high-speed motor-driven inverse booster air circulation refrigeration systems. Wang Xiangqing and Li Zhonghua of China Northern Vehicle Research Institute analyzed vehicle air circulation ...

Claims

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Application Information

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IPC IPC(8): H02K7/14F04D25/08
Inventor 佟宪良
Owner BEIJING LIANGMING TONGCHUANG WATER TREATMENT EQUIP DEV CENT
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