MAGNETIC SUSPENSION LOCAL VENTILATOR FOR MINING

WIPO Patent Application WO/2022/073302

A1

A magnetic suspension local ventilator for mining, comprising a housing unit and a ventilation unit which is mounted in the housing. The ventilation unit comprises an inner housing, a protective sleeve (12), a magnetic bearing (2), an electromagnetic coil (22), a stator (13), a rotor (14), a rotating shaft (15), an impeller (17) and a limited-position rolling ball (21). The protective sleeve (12) is fixed in the housing. A coolant (16) passage is reserved between the protective sleeve (12) and the housing. The magnetic bearing (2) comprises an inner sleeve magnetic ring (11), an outer sleeve magnetic ring (10) and a bearing sleeve. The rotating shaft (15) has a non-contact rotatable connection to the protective sleeve (12) by means of the magnetic bearing (2) and the limited-position rolling ball (21). The inner sleeve magnetic ring (11) is suspended using the electromagnetic coil (22). The magnetic suspension local ventilator for mining can reduce abrasion and noise, improve the air volume and the ventilation stability of an excavation work surface, and meet the need of coal mines with special requirements such as explosion prevention.

NIE BAISHENG (CN)
ZHOU JIN (CN)
LI XIANGCHUN (CN)
MENG JUNQING (CN)
CAO LIUJIE (CN)
GAO QIANG (CN)

PCT/CN2020/139317

April 14, 2022

December 25, 2020

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UNIV CHINA MINING (CN)
UNIV NANJING AERONAUTICS & ASTRONAUTICS (CN)

F04D25/16; F04D25/08; F04D29/058; F04D29/58; H02K5/16; H02K9/19

CN204591728U	2015-08-26
CN105332932A	2016-02-17
CN208294791U	2018-12-28
CN208364419U	2019-01-11
CN203892220U	2014-10-22
CN202273889U	2012-06-13
JP2017203521A	2017-11-16

BEIJING GAOWO LAW FIRM (CN)

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