WO2022073302A1 - 矿用磁悬浮局部通风机 - Google Patents

矿用磁悬浮局部通风机 Download PDF

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Publication number
WO2022073302A1
WO2022073302A1 PCT/CN2020/139317 CN2020139317W WO2022073302A1 WO 2022073302 A1 WO2022073302 A1 WO 2022073302A1 CN 2020139317 W CN2020139317 W CN 2020139317W WO 2022073302 A1 WO2022073302 A1 WO 2022073302A1
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WIPO (PCT)
Prior art keywords
magnetic
bearing
sleeve
cooling liquid
housing
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PCT/CN2020/139317
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English (en)
French (fr)
Inventor
聂百胜
周瑾
李祥春
孟筠青
曹留杰
高强
Original Assignee
中国矿业大学(北京)
南京航空航天大学
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Publication of WO2022073302A1 publication Critical patent/WO2022073302A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/007—Axial-flow pumps multistage fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/058—Bearings magnetic; electromagnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • the invention relates to the technical field of tunnel ventilation, in particular to a magnetic levitation local fan for mining.
  • Mine fans are often equipped with mine explosion-proof motors, but the current working conditions of mine explosion-proof motors are poor, the motors are frequently started with large loads, the load changes are large, the voltage fluctuations are large, the ambient temperature is high, and there is a certain degree of corrosiveness, which is not conducive to The motor is explosion-proof.
  • the noise of the traditional ball bearing local fan is very loud, some can reach 120dB or more, which has a great impact on the hearing of the staff working in the roadway; the traditional local fan consumes a lot of energy, because it needs to run for a long time, energy consumption
  • the annual mine ventilation energy consumption accounts for about 40% of the total mine electricity consumption.
  • the purpose of the present invention is to provide a kind of magnetic levitation partial fan for mining, which is used to solve the technical problems existing in the above-mentioned prior art, reduce wear and noise, improve the air volume and ventilation stability of the tunneling face, and meet special requirements such as explosion-proof use of coal mines.
  • the present invention provides the following scheme:
  • the invention discloses a local magnetic levitation fan for mining, comprising:
  • the housing unit includes an outer housing, a collector and a diffuser, the collector is mounted on one end of the housing, and the diffuser is mounted on the other end of the housing;
  • a ventilation unit the ventilation unit is installed in the casing, and includes an inner casing, a sheath, a magnetic suspension bearing, an electromagnetic coil, a stator, a rotor, a rotating shaft, an impeller and a limiting ball, and the sheath is fixed to the A cooling liquid channel is left in and between the casing, the rotating shaft passes through the sheath, the rotor and the impeller are respectively fixed to the middle and end of the rotating shaft, and the stator is installed On the sheath, the magnetic suspension bearing includes an inner magnetic ring, an outer magnetic ring and a bearing sleeve, the inner magnetic ring is fixed on the rotating shaft through the bearing sleeve, and the outer magnetic ring passes through the bearing sleeve.
  • the bearing sleeve is fixed on the sleeve, the rotating shaft is connected to the sleeve in a non-contact rotation through the magnetic suspension bearing and the limiting ball, and the electromagnetic coil is used to make the inner sleeve magnetically connected. Ring suspension.
  • two ventilation units are installed in the housing unit, and the impellers of the two ventilation units are arranged adjacent to each other and facing each other.
  • a displacement sensor is also included, and the displacement sensor is mounted on the magnetic suspension bearing.
  • the electromagnetic coil is mounted on the outer magnetic ring.
  • the cooling liquid channel is in the shape of a cylinder as a whole, and both ends of the inner casing are respectively provided with a liquid inlet and a liquid outlet that communicate with the cooling liquid flow channel.
  • the liquid is in direct contact with the magnetic bearing, the stator and the sheath.
  • the cooling liquid channel has a convex annular flow channel on both sides of the stator, and the cooling liquid in the annular flow channel is in direct contact with the stator.
  • the mining magnetic levitation partial fan of the present invention utilizes the magnetic levitation bearing to replace the traditional bearing, and the electromagnetic force generated after the electromagnetic coil is energized makes the inner sleeve magnetic ring levitate in the specified position. It has the characteristics of no friction and wear, does not require lubrication and sealing, does not generate heat due to friction, can improve work efficiency, can work in a high temperature environment, and has low noise and high speed during operation.
  • the mining magnetic levitation fan of the present invention adopts a magnetic levitation bearing that isolates the stator structure, and separates the stator from other components with a sealed sheath.
  • the casing is provided with a cooling fluid flow channel to cool the magnetic levitation bearing, the rotor, the sheath and the stator.
  • the motor and the air are isolated by the coolant, so it is very suitable for underground coal mines with particularly high requirements for explosion-proof, waterproof and toxic gases.
  • the magnetic levitation fan for mining of the present invention is mainly used in the ventilation system of the tunnel of the coal mine, and the noise generated by the magnetic levitation bearing is low, which protects the hearing of workers from being disturbed.
  • the magnetic levitation fan for mining of the present invention has low energy consumption, which can greatly reduce the energy consumption of ventilation in underground tunneling.
  • Fig. 1 is the overall structure schematic diagram of the mining magnetic levitation partial ventilator of the present embodiment
  • Fig. 2 is the structural representation of ventilation unit
  • Figure 3 is a schematic diagram of the installation position of the electromagnetic coil
  • the purpose of the present invention is to provide a kind of magnetic levitation partial fan for mining, which is used to solve the technical problems existing in the above-mentioned prior art, reduce wear and noise, improve the air volume and ventilation stability of the tunneling face, and meet special requirements such as explosion-proof use of coal mines.
  • this embodiment provides a local magnetic levitation fan for mining, which includes a housing unit and a ventilation unit installed in the housing.
  • the housing unit includes an outer casing, a collector 1 and a diffuser 8 , the collector 1 has an air inlet, and the diffuser 8 has an air outlet 9 .
  • the collector 1 is mounted on one end of the casing, and the diffuser 8 is mounted on the other end of the casing.
  • the ventilation unit includes an inner casing, a sheath 12 , a magnetic suspension bearing, an electromagnetic coil 22 , a stator 13 , a rotor 14 , a rotating shaft 15 , an impeller 17 and a limiting ball 21 .
  • the sheath 12 is fixed in the outer casing and has a cooling liquid 16 channel between the outer casing and the cooling liquid 16.
  • the cooling liquid 16 flow channel is used for accommodating the cooling liquid 16, and plays the role of cooling and isolating the outside air.
  • the rotating shaft 15 passes through the sheath 12 , the rotor 14 and the impeller 17 are respectively fixed to the middle and the end of the rotating shaft 15 , and the stator 13 is mounted on the sheath 12 .
  • the stator 13 and the rotor 14 form a motor structure, and when the rotor 14 rotates, the impeller 17 is driven to rotate, which plays the role of ventilation.
  • the magnetic suspension bearing includes an inner magnetic ring 11 , an outer magnetic ring 10 and a bearing sleeve.
  • the inner magnetic ring 11 is fixed on the rotating shaft 15 through the bearing sleeve, and the outer magnetic ring 10 is fixed on the sheath 12 through the bearing sleeve.
  • the bearing sleeve is used to fix and package the magnets arranged inside.
  • the outer magnetic ring 10 and the inner magnetic ring 11 are formed by a number of bar magnets that are closely arranged around the outer circumference.
  • the inner magnetic poles are the same.
  • the rotating shaft 15 is rotatably connected to the sheath 12 through a magnetic suspension bearing and a position-limiting ball 21 , and the electromagnetic coil 22 is used to suspend the inner sleeve magnetic ring 11 .
  • the electromagnetic coil 22 is mounted on the outer magnetic ring 10 .
  • the rotating shaft 15 When the electromagnetic coil 22 is energized, the inner sleeve magnetic ring 11 and the rotating shaft 15 relatively fixed to the inner sleeve magnetic ring 11 are suspended, the rotating shaft 15 will not generate friction with the sheath 12 when rotating, and the inner sleeve magnetic ring 11 will not It generates friction with the outer magnetic ring 10, does not need lubrication and sealing, can improve work efficiency, can work in a high temperature environment, and has low noise and high rotation speed during operation.
  • the cooling liquid 16 is first filled into the cooling liquid 16 flow channel, and the electromagnetic coil 22 is energized, so that the inner sleeve magnetic ring 11 and the inner sleeve magnetic ring 11 are relatively fixed.
  • the rotating shaft 15 Suspended, then energized the motor to drive the rotating shaft 15 to rotate, driving the impeller 17 to rotate, forming a one-way airflow, the airflow flows into the outer casing from the collector 1, and flows out of the outer casing from the diffuser 8 to achieve the effect of one-way ventilation.
  • two ventilation units are installed in the housing unit of this embodiment, and the impellers 17 of the two ventilation units are arranged adjacent to each other and facing each other.
  • the magnetic bearing, motor and impeller of the left ventilation unit are the first-level magnetic bearing 2
  • the first-level host motor 3 and the first-level impeller 4 respectively
  • the magnetic bearing, motor and impeller of the right ventilation unit are the second-level respectively.
  • Magnetic suspension bearing 7 , secondary host motor 6 and secondary impeller 5 are the first-level magnetic bearing 2
  • the first-level host motor 3 and the first-level impeller 4 are the second-level respectively.
  • this embodiment further includes a displacement sensor, which is installed on the magnetic suspension bearing.
  • the specific structure of the cooling liquid 16 channel can be designed according to actual needs, as long as it can cool down and isolate the outside air.
  • the cooling liquid 16 channel is cylindrical as a whole, and the two ends of the inner casing are respectively provided with a liquid inlet 18 and a liquid outlet 19 communicating with the cooling liquid 16 flow channel. 16 is in direct contact with the magnetic suspension bearing, the stator 13 and the sheath 12 and exchanges heat, and indirectly cools the rotor 14 .
  • the cooling liquid 16 channel of this embodiment has a convex annular flow channel on both sides of the stator 13, and the cooling liquid 16 in the annular flow channel is in direct contact with the stator 13, thereby increasing the cooling liquid 16 and the stator. 13 contact area.

Abstract

一种矿用磁悬浮局部通风机，包括壳体单元和安装于壳体内的通风单元。通风单元包括内壳体、护套（12）、磁悬浮轴承（2）、电磁线圈（22）、定子（13）、转子（14）、旋转轴（15）、叶轮（17）和有限位滚球（21），护套（12）固定于外壳内且与外壳之间留有冷却液（16）通道，磁悬浮轴承（2）包括内套磁环（11）、外套磁环（10）和轴承套，旋转轴（15）通过磁悬浮轴承（2）、有限位滚球（21）与护套（12）无接触式转动连接，电磁线圈（22）用于使内套磁环（11）悬浮。上述矿用磁悬浮局部通风机能够降低磨损和噪音，提高掘进工作面的风量和通风稳定性，并满足具有防爆等特殊要求的煤矿井的使用。

Description

矿用磁悬浮局部通风机 技术领域
本发明涉及巷道通风技术领域，特别是涉及一种矿用磁悬浮局部通风机。
背景技术
目前我国煤矿巷道掘进机械化程度越来越高，掘进速度越来越快，千米以上巷道远距离掘进成为常态。远距离巷道的掘进施工最关键的是要解决通风问题，通风不足、通风不可靠就无法实现远距离巷道掘进施工，同时也影响掘进施工速度。一旦出现风量不足，供风不稳定的情况，就会严重制约回风探巷的掘进速度和安全生产。如何提高局部通风的稳定性，提高掘进工作面的风量，成为亟待解决的问题。
传统的矿用通风机由于使用机械轴承支承转子，存在摩擦和磨损，以及转速低等问题。由于矿用通风机大多是不间断地工作，其机械磨损严重，齿轮间隙变大，从而引起振动变大。这不仅会缩短风机的使用寿命，而且在条件恶劣的矿井环境中由于剧烈振动还可能引发安全事故。
矿用通风机经常搭载矿用防爆电机，而当前矿用防爆电机的工况条件较差，电机频繁大负荷启动、负荷变化大、电压波动大、环境温度高且有一定的腐蚀性，不利于电机防爆。
传统的滚珠轴承的局部通风机噪音非常大，有的可以达到120dB以上，对于在巷道中工作的工作人员听力带来很大的影响；传统的局部通风机能耗大，因为需要长期运行，能量消耗严重，每年矿井通风能耗占矿井总用电量的40％左右。
发明内容
本发明的目的是提供一种矿用磁悬浮局部通风机，用于解决上述现有技存在的技术问题，降低磨损和噪音，提高掘进工作面的风量和通风稳定性，并满足具有防爆等特殊要求的煤矿井的使用。
为实现上述目的，本发明提供了如下方案：
本发明公开了一种矿用磁悬浮局部通风机，包括：
壳体单元，所述壳体单元包括外壳体、集流器和扩散器，所述集流器安装于所述壳体的一端，所述扩散器安装于所述壳体的另一端；
通风单元，所述通风单元安装于所述壳体内，包括内壳体、护套、磁悬浮轴承、电磁线圈、定子、转子、旋转轴、叶轮和有限位滚球，所述护套固定于所述外壳内且与所述外壳之间留有冷却液通道，所述旋转轴穿过所述护套，所述转子和所述叶轮分别固定于所述旋转轴的中部和端部，所述定子安装于所述护套上，所述磁悬浮轴承包括内套磁环、外套磁环和轴承套，所述内套磁环通过所述轴承套固定于所述旋转轴上，所述外套磁环通过所述轴承套固定于所述护套上，所述旋转轴通过所述磁悬浮轴承、所述有限位滚球与所述护套无接触式转动连接，所述电磁线圈用于使所述内套磁环悬浮。
优选地，所述壳体单元内安装有两个所述通风单元，两个所述通风单元的所述叶轮相邻且正对设置。
优选地，还包括位移传感器，所述位移传感器安装于所述磁悬浮轴承上。
优选地，所述电磁线圈安装于所述外套磁环上。
优选地，所述冷却液通道整体呈圆筒状，所述内壳体的两端分别设有与所述冷却液流道连通的进液口和出液口，所述冷却液流道内的冷却液与所述磁悬浮轴承、所述定子和所述护套直接接触。
优选地，所述冷却液通道在所述定子的两侧各具有一外凸的环形流道，所述环形流道内的冷却液与所述定子直接接触。
本发明相对于现有技术取得了以下技术效果：
1、本发明的矿用磁悬浮局部通风机利用磁悬浮轴承代替传统轴承，电磁线圈通电后产生的电磁力使内套磁环悬浮于规定的位置。具有无摩擦磨损的特点，不需要润滑和密封，不会摩擦产生热量，能提高工作效率，可以在高温环境下工作，且运转时噪声低、转速高。
2、本发明的矿用磁悬浮风机采用隔离定子结构的磁悬浮轴承，用密封的护套将定子与其它元件隔离开，机壳内设有冷却液流道，冷却磁悬浮轴承、转子、护套及定子，电机与空气之间被冷却液隔离，因此非常适用于对防爆、防水、毒性气体要求特别高的煤矿井下。
3、本发明的矿用磁悬浮通风机主要应用在煤矿掘进巷道的通风系统中，磁悬浮轴承产生的噪音低，保护工人听力不受干扰。
4、本发明的矿用磁悬浮通风机能耗低，可以大大降低井下掘进巷道通风的能耗。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本实施例矿用磁悬浮局部通风机的整体结构示意图；
图2为通风单元的结构示意图；
图3为电磁线圈的安装位置示意图；
附图标记说明：1-集流器；2-磁悬浮轴承；3-一级主机电机；4-一级叶轮；5-二级叶轮；6-二级主机电机；7-磁悬浮轴承；8-扩散器；9-出风口；10-外套磁环；11-内套磁环；12-护套；13-定子；14-转子；15-旋转轴；16-冷却液；17-叶轮；18-进液口；19-出液口；21-有限位滚球；22-电磁线圈。
具体实施方式
本发明的目的是提供一种矿用磁悬浮局部通风机，用于解决上述现有技存在的技术问题，降低磨损和噪音，提高掘进工作面的风量和通风稳定性，并满足具有防爆等特殊要求的煤矿井的使用。
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本发明作进一步详细的说明。
如图1-3所示，本实施例提供一种矿用磁悬浮局部通风机，包括壳体单元和安装于壳体内的通风单元。
其中，壳体单元包括外壳体、集流器1和扩散器8，集流器1具有进风口，扩散器8具有出风口9。集流器1安装于壳体的一端，扩散器8安装于壳体的另一端。通风单元包括内壳体、护套12、磁悬浮轴承、电磁线圈22、定子13、转子14、旋转轴15、叶轮17和有限位滚球21。护套12固定于外壳内且与外壳之间留有冷却液16通道，冷却液16流道用于容纳冷却液16，起到冷却降温和隔离外部空气的作用。旋转轴15穿过护套12，转子14和叶轮17分别固定于旋转轴15的中部和端部，定子13安装于护套12上。定子13和转子14组成电机结构，当转子14旋转时带动叶轮17旋转，起到通风的作用。磁悬浮轴承包括内套磁环11、外套磁环10和轴承套，内套磁环11通过轴承套固定于旋转轴15上，外套磁环10通过轴承套固定于护套12上。轴承套用于固定和包装内部排列的磁铁，外套磁环10和内套磁环11均由数个环绕外周侧的条形磁铁紧密排布形成，内套磁环11外侧的磁极与外套磁环10的内侧磁极相同。旋转轴15通过磁悬浮轴承、有限位滚球21与护套12无接触式转动连接，电磁线圈22用于使内套磁环11悬浮。本实施例中，电磁线圈22安装于外套磁环10上。当电磁线圈22通电后，内套磁环11以及与内套磁环11相对固定的旋转轴15悬浮，旋转轴15在转动时不会与护套12产生摩擦，内套磁环11也不会与外套磁环10产生摩擦，无需润滑和密封，能提高工作效率，可以在高温环境下工作，且运转时噪声低、转速高。
该矿用磁悬浮局部通风机在使用时，先将冷却液16填充至冷却液16流道内，并给电磁线圈22通电，使内套磁环11以及与内套磁环11相对固定的旋转轴15悬浮，然后给电机通电，驱动旋转轴15转动，带动叶轮17旋转，形成单向气流，气流从集流器1处流入外壳体，从扩散器8处流出外壳体，达到单向通风的效果。
为了提高通风效果，本实施例的壳体单元内安装有两个通风单元，两个通风单元的叶轮17相邻且正对设置。图1-3中左侧通风单元的磁悬浮轴承、电机和叶轮分别为一级磁悬浮轴承2、一级主机电机3和一级叶轮4，右侧通风单元的磁悬浮轴承、电机和叶轮分别为二级磁悬浮轴承7、二级主机电机6和二级叶轮5。
为了便于监测旋转轴15的变化，本实施例还包括位移传感器，位移 传感器安装于磁悬浮轴承上。
冷却液16通道的具体结构可以根据实际需要进行设计，只要能起到冷却降温和隔离外部空气的作用即可。本实施例中，冷却液16通道整体呈圆筒状，内壳体的两端分别设有与冷却液16流道连通的进液口18和出液口19，冷却液16流道内的冷却液16与磁悬浮轴承、定子13和护套12直接接触并进行热交换，并间接冷却转子14。
为了提高冷却效果，本实施例的冷却液16通道在定子13的两侧各具有一外凸的环形流道，环形流道内的冷却液16与定子13直接接触，从而增大冷却液16与定子13的接触面积。
本说明书中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处。综上所述，本说明书内容不应理解为对本发明的限制。

Claims (6)

  1. 一种矿用磁悬浮局部通风机，其特征在于，包括：
    壳体单元，所述壳体单元包括外壳体、集流器和扩散器，所述集流器安装于所述壳体的一端，所述扩散器安装于所述壳体的另一端；
    通风单元，所述通风单元安装于所述壳体内，包括内壳体、护套、磁悬浮轴承、电磁线圈、定子、转子、旋转轴、叶轮和有限位滚球，所述护套固定于所述外壳内且与所述外壳之间留有冷却液通道，所述旋转轴穿过所述护套，所述转子和所述叶轮分别固定于所述旋转轴的中部和端部，所述定子安装于所述护套上，所述磁悬浮轴承包括内套磁环、外套磁环和轴承套，所述内套磁环通过所述轴承套固定于所述旋转轴上，所述外套磁环通过所述轴承套固定于所述护套上，所述旋转轴通过所述磁悬浮轴承、所述有限位滚球与所述护套无接触式转动连接，所述电磁线圈用于使所述内套磁环悬浮。
  2. 根据权利要求1所述的矿用磁悬浮局部通风机，其特征在于，所述壳体单元内安装有两个所述通风单元，两个所述通风单元的所述叶轮相邻且正对设置。
  3. 根据权利要求1所述的矿用磁悬浮局部通风机，其特征在于，还包括位移传感器，所述位移传感器安装于所述磁悬浮轴承上。
  4. 根据权利要求1所述的矿用磁悬浮局部通风机，其特征在于，所述电磁线圈安装于所述外套磁环上。
  5. 根据权利要求1所述的矿用磁悬浮局部通风机，其特征在于，所述冷却液通道整体呈圆筒状，所述内壳体的两端分别设有与所述冷却液流道连通的进液口和出液口，所述冷却液流道内的冷却液与所述磁悬浮轴承、所述定子和所述护套直接接触。
  6. 根据权利要求1所述的矿用磁悬浮局部通风机，其特征在于，所述冷却液通道在所述定子的两侧各具有一外凸的环形流道，所述环形流道内的冷却液与所述定子直接接触。
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