WO2020103520A1 - 磁悬浮轴承结构及磁悬浮压缩机结构 - Google Patents

磁悬浮轴承结构及磁悬浮压缩机结构

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Publication number
WO2020103520A1
WO2020103520A1 PCT/CN2019/103990 CN2019103990W WO2020103520A1 WO 2020103520 A1 WO2020103520 A1 WO 2020103520A1 CN 2019103990 W CN2019103990 W CN 2019103990W WO 2020103520 A1 WO2020103520 A1 WO 2020103520A1
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WO
WIPO (PCT)
Prior art keywords
bearing
stator
magnetic
radial bearing
magnetic levitation
Prior art date
Application number
PCT/CN2019/103990
Other languages
English (en)
French (fr)
Inventor
刘鹏辉
张小波
张芳
龚高
张超
苏久展
李欣
董如昊
邓明星
王飞
Original Assignee
珠海格力电器股份有限公司
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Filing date
Publication date
Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Priority to EP19887051.1A priority Critical patent/EP3859163A4/en
Priority to US17/289,213 priority patent/US11466731B2/en
Publication of WO2020103520A1 publication Critical patent/WO2020103520A1/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
    • 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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • 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
    • F04D29/051—Axial thrust balancing
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0444—Details of devices to control the actuation of the electromagnets
    • F16C32/0446—Determination of the actual position of the moving member, e.g. details of sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0459—Details of the magnetic circuit
    • F16C32/0461—Details of the magnetic circuit of stationary parts of the magnetic circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/047—Details of housings; Mounting of active magnetic bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/083—Structural association with bearings 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
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/09—Structural association with bearings with magnetic bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/80—Devices generating input signals, e.g. transducers, sensors, cameras or strain gauges
    • F05D2270/821—Displacement measuring means, e.g. inductive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/44—Centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2362/00—Apparatus for lighting or heating
    • F16C2362/52—Compressors of refrigerators, e.g. air-conditioners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0474—Active magnetic bearings for rotary movement
    • F16C32/0489—Active magnetic bearings for rotary movement with active support of five degrees of freedom, e.g. two radial magnetic bearings combined with an axial bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0474—Active magnetic bearings for rotary movement
    • F16C32/0493—Active magnetic bearings for rotary movement integrated in an electrodynamic machine, e.g. self-bearing motor
    • F16C32/0497—Active magnetic bearings for rotary movement integrated in an electrodynamic machine, e.g. self-bearing motor generating torque and radial force
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/03—Machines characterised by thrust bearings

Definitions

  • the present application relates to the technical field of air conditioning, in particular to a new type of magnetic suspension bearing structure and a new type of magnetic suspension compressor structure.
  • the existing magnetic levitation compressor is a centrifugal compressor composed of a high-speed motor, a magnetic levitation bearing, a displacement sensor, a bearing protection structure, a pneumatic component, a bearing controller, and a motor driver.
  • Chinese patent 201510279957.9 discloses a permanent magnet biased axial magnetic levitation bearing centrifugal compressor and a centrifugal compressor using the permanent magnet biased axial magnetic levitation bearing.
  • the permanent magnetic offset axial magnetic levitation bearing includes a right axial magnetic pole, a left axial magnetic pole, a stator magnet core, a main shaft, a thrust disk and a permanent magnet; wherein, the left axial magnetic pole and the right axial magnetic pole Connected; the stator magnetizer core is set to the right of the right axial pole or the left axis pole to the left; the main shaft is set in the axial opening formed by the left and right axial poles and the stator magnetizer core The thrust disk is set on the main shaft, and a first axial gap is provided between the thrust disk and the stator magnet core; the permanent magnet is arranged between the stator magnet core and the right axial magnetic pole or between the stator magnet core and the left axial magnetic pole between.
  • the magnetic fields under each pole are not independent of each other.
  • There is interference coupling between the magnetic fields generated by different control winding currents which exacerbates the difficulty of bearing control; in addition, due to magnetic leakage
  • the existence of the magnetic field reduces the electromagnetic force of the magnetic pole.
  • the current needs to be increased to improve the electromagnetic force, which further increases the eddy current and hysteresis loss, which increases the energy consumption. Therefore, due to the coupling, the suspension force of the two degrees of freedom of the magnetic suspension bearing will be coupled to each other, making the bearing control more difficult, and at the same time increasing the current loss.
  • a new type of magnetic suspension bearing structure includes a cylinder, a rotating shaft, a motor stator, a motor rotor, an axial bearing, a radial bearing and a displacement sensing device.
  • the axial bearing includes an axial bearing stator and an axial bearing rotor.
  • the bearing includes a radial bearing stator and a radial bearing rotor, the motor rotor, the axial bearing rotor, and the radial bearing rotor are sleeved on the rotating shaft, the motor stator is sleeved on the barrel, and the barrel is sleeved on the rotary shaft; the displacement sensing device,
  • the axial bearing stator and the radial bearing stator are directly arranged on the inner wall of the cylinder.
  • the axial bearing stator is an axial bearing after magnetic levitation and an axial bearing before magnetic levitation
  • the axial bearing rotor is a thrust bearing
  • the thrust bearing is located between the axial bearing after the magnetic levitation and the axial bearing before the magnetic levitation.
  • the radial bearing stator is a magnetic bearing radial bearing stator and a magnetic bearing radial bearing stator
  • the radial bearing rotor is a magnetic bearing radial bearing rotor and a magnetic bearing radial bearing rotor
  • the radial bearing stator after the magnetic levitation and the radial bearing stator before the magnetic levitation are sleeved in the cylinder and are located on both sides of the motor stator.
  • the radial bearing rotor after the magnetic suspension and the radial bearing rotor before the magnetic suspension are sleeved on the rotating shaft and are located on both sides of the motor rotor.
  • the magnetic bearing radial bearing stator and the magnetic bearing radial bearing stator are respectively provided with a magnetic bearing radial bearing winding and a magnetic bearing radial bearing stator winding.
  • the displacement sensing device includes a rear displacement sensor assembly and a front displacement sensor assembly.
  • the rear displacement sensor assembly and the front displacement sensor assembly are housed in the cylinder, and are respectively located in the magnetic radial rear bearing stator and the magnetic suspension front radial bearing. Both sides of the stator.
  • the rear displacement sensor assembly and the front displacement sensor assembly are respectively provided with a rear secondary protection, a rear displacement sensor, a front secondary protection, and a front displacement sensor.
  • a rear ball bearing and a front ball bearing are provided at the inner diameters of the rear displacement sensor assembly and the front displacement sensor assembly, respectively.
  • the rear ball bearing and the front ball bearing are provided with a rear ball bearing baffle and a front ball bearing baffle outside.
  • a new type of magnetic suspension compressor structure adopts the above-mentioned new type magnetic suspension bearing structure.
  • this application reduces the front and rear bearing shells in the magnetic levitation compressor and reduces the production cost of the compressor; compared with the original solution, the coaxiality of the displacement sensor assembly and the motor stator is greatly improved Reduce the unilateral magnetic pulling force when the motor is running, reduce the harmonics generated by the motor winding, reduce the core loss of the motor, and reduce the heat generation of the motor, and the efficiency of the compressor can also be improved to a certain extent At the same time, the distance between the primary protection, secondary protection and the shaft can be detected more accurately. When the primary protection contacts the shaft during operation, it can be stopped in time to avoid continuous contact between the primary protection or the secondary protection and the high-speed shaft. Damage (In the original scheme, the primary protection is far away from the displacement sensor.
  • the shaft at the primary protection may be deformed due to factors such as high speed and temperature, while the displacement sensor is far away from the primary protection and cannot be very accurate.
  • the distance between the detection shaft and the first-level protection and the shaft sometimes there will be contact between the first-level protection and the high-speed shaft, and the displacement sensor fails to detect the contact between the two, resulting in the failure to start the power protection shutdown process in time); and now the sensor The component is larger than the original sensor, and the housing of the sensor has higher accuracy during processing.
  • Figure 1 is a diagram of the magnetic suspension stator core.
  • the embodiment of the present application provides a structure of a magnetic levitation compressor adopting a new type of magnetic levitation bearing structure, as shown in FIG. 1, which includes an axial bearing 1 after the magnetic suspension; a thrust bearing 2; an axial bearing 3 before the magnetic suspension; Rear displacement sensor assembly 5; rear secondary protection 51; rear displacement sensor 52; rear ball bearing 6; radial bearing winding 7 after magnetic suspension; radial bearing stator 8 after magnetic suspension; radial bearing rotor 9 after magnetic suspension; motor stator winding 10; motor stator 11; motor rotor 12; barrel 13; magnetic bearing radial bearing stator winding 14; magnetic bearing radial bearing stator 15; magnetic bearing radial bearing rotor 16; front displacement sensor assembly 17; front secondary protection 171 ; Front displacement sensor 172; Front ball bearing baffle 18; Front ball bearing 19; Pneumatic parts 20; Box 21; Rotating shaft 22.
  • the displacement sensor is integrated with the secondary protection and serves as the support position of the ball bearing.
  • the interference between the motor stator 11 and the cylinder 13 is designed to be large, to ensure that the torque of the motor stator during the compressor operation will not cause relative displacement with the cylinder 13;
  • the thermal sleeve magnetic levitation radial bearing, the cylindrical body 13 and the magnetic levitation radial bearing are designed with a small interference, the radial bearing only receives radial force, and the small interference can ensure that the cylinder 13 and the magnetic suspension radial bearing will not produce relative Displacement;
  • heat sleeve displacement sensor assembly 17/5, barrel 13 and displacement sensor assembly are also designed to have a small interference fit, displacement sensors generally only start and stop or shaft operation is unstable, the first level of protection will be limited
  • the radial force acts; if the parts are not in place during the heat-shrinking process, the parts can be pressed to the designated position with a hydraulic press.
  • the barrel 13 can be Continue to put it in the high temperature box for heating, but it should be noted that the heating temperature must be less than the maximum temperature of the parts running on the barrel 13 (if it is found that the temperature of the barrel 13 is already low after the thermal stator is completed, it is not enough to thermally sleeve the magnetic bearing stator, You can continue to heat the barrel assembly, but the heating temperature cannot be higher than the maximum temperature allowed by the stator winding, otherwise it will damage the enameled wire and damage the insulation between the wire and the wire).

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

一种新型磁悬浮轴承结构及压缩机结构，包括筒体（13）、转轴（22）、电机定子（11）、电机转子（12）、轴向轴承、径向轴承和位移传感装置（5、17），所述位移传感装置（5、17）、轴向轴承定子（1、3）、径向轴承定子（8、15）直接固定在筒体（13）内壁上，与原有技术相比取消了磁悬浮压缩机内的前后轴承壳体，减少了压缩机的生产成本，位移传感器组件与电机定子（11）同轴度得到极大的改善，能减小电机运行时的单边磁拉力，减小了电机绕组产生的谐波，减小了电机的铁芯损耗，也减小了电机的发热量，同时压缩机的效率也能得到一定的提高，极大的提高了压缩机的性能。

Description

磁悬浮轴承结构及磁悬浮压缩机结构
相关申请
本申请要求2018年11月21日申请的，申请号为201811397403.9，名称为“一种新型磁悬浮压缩机结构”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及空调技术领域，尤其涉及一种新型磁悬浮轴承结构及新型磁悬浮压缩机结构。
背景技术
目前现有的磁悬浮压缩机是一种由高速电机、磁悬浮轴承、位移传感器、轴承保护结构、气动部件、轴承控制器、电机驱动器组成的离心式压缩机。
中国专利201510279957.9公开了一种永磁偏置轴向磁悬浮轴承离心压缩机和一种离心压缩机，采用所述的永磁偏置轴向磁悬浮轴承。
它的技术方案为：该永磁偏置轴向磁悬浮轴承包括右轴向磁极、左轴向磁极、定子导磁铁芯、主轴、推力盘和永磁体；其中，左轴向磁极与右轴向磁极相连接；定子导磁铁芯设置在右轴向磁极的右侧或左轴向磁极的左侧；主轴设置在左轴向磁极、右轴向磁极与定子导磁铁芯所形成的轴向开孔中；推力盘套装在主轴上，推力盘与定子导磁铁芯之间设置有第一轴向间隙；永磁体设置在定子导磁铁芯与右轴向磁极之间或定子导磁铁芯与左轴向磁极之间。
但是，由于各绕组通入的电流不相等，各极下的磁场并不是相互独立的，不同控制绕组电流产生的磁场之间存在着干扰耦合现象，从而加剧了轴承控制的难度；另外由于漏磁的存在，致使磁极电磁力降低，这时需要增大电流来提高电磁力，进一步增加了涡流和磁滞损耗，这样就增大了能耗。因此由于耦合的存在，将导致磁悬浮轴承两个自由度上悬浮力的相互耦合，使轴承控制变的更加困难，同时也增大了电流损耗。
发明内容
本申请要解决的技术问题克服了现有技术的不足，提供一种新型磁悬浮轴承结构，具 体地说，为了解决上述技术问题，本申请采用的技术方案如下：
一种新型磁悬浮轴承结构，包括筒体、转轴、电机定子、电机转子、轴向轴承、径向轴承和位移传感装置，所述轴向轴承包括轴向轴承定子和轴向轴承转子，径向轴承包括径向轴承定子和径向轴承转子，所述电机转子、轴向轴承转子、径向轴承转子套装在转轴上，电机定子套装在筒体内，筒体套装在转轴上；位移传感装置、轴向轴承定子、径向轴承定子直接设置在筒体内壁上。
在其中一个实施例中，轴向轴承定子为磁悬浮后轴向轴承和磁悬浮前轴向轴承，轴向轴承转子为止推轴承。
在其中一个实施例中，止推轴承位于磁悬浮后轴向轴承和磁悬浮前轴向轴承之间。
在其中一个实施例中，径向轴承定子为磁悬浮后径向轴承定子和磁悬浮前径向轴承定子，径向轴承转子为磁悬浮后径向轴承转子和磁悬浮前径向轴承转子。
在其中一个实施例中，磁悬浮后径向轴承定子和磁悬浮前径向轴承定子套装在筒体内，位于电机定子两侧。
在其中一个实施例中，磁悬浮后径向轴承转子和磁悬浮前径向轴承转子套装在转轴上，位于电机转子两侧。
在其中一个实施例中，磁悬浮后径向轴承定子和磁悬浮前径向轴承定子上分别设置有磁悬浮后径向轴承绕组和磁悬浮前径向轴承定子绕组。
在其中一个实施例中，位移传感装置包括后位移传感器组件和前位移传感器组件，后位移传感器组件和前位移传感器组件套装在筒体内，分别位于磁悬浮后径向轴承定子和磁悬浮前径向轴承定子的两侧。
在其中一个实施例中，后位移传感器组件和前位移传感器组件的内径处分别设有后二级保护、后位移传感器和前二级保护、前位移传感器。
在其中一个实施例中，后位移传感器组件和前位移传感器组件的内径处分别设有后滚珠轴承和前滚珠轴承。
在其中一个实施例中，后滚珠轴承和前滚珠轴承的外侧设有后滚珠轴承挡板和前滚珠轴承挡板。
一种新型磁悬浮压缩机结构，采用了上述的新型磁悬浮轴承结构。
本申请的有益效果如下：
本申请与原有技术相比减少了磁悬浮压缩机内的前后轴承壳体，减少了压缩机的生产成本；与原有方案相比位移传感器组件与电机定子同轴度得到极大的改善，能减小电机运行时的单边磁拉力，减小了电机绕组产生的谐波，减小了电机的铁芯损耗，也减小了电机 的发热量，同时压缩机的效率也能得到一定的提高，同时能更准确的检测到一级保护、二级保护与轴的距离，当运行时一级保护与轴接触时能及时停机，避免一级保护或二级保护与高速运转的轴持续接触而损坏(原方案中一级保护离位移传感器较远，当轴高速运转时，一级保护处的轴可能因高速和温度等因素产生变形，而位移传感器离一级保护处较远，不能很准确的检测轴与一级保护与轴的距离，有时会出现一级保护与高速运转的轴接触，而位移传感器未能检测到两者接触，以致未能及时启功保护停机程序)；而且现在传感器组件较原来传感器体积大，在加工过程中，传感器的外壳精度更高。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述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申请的实施例，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，还可以根据公开的附图获得其他的附图。
图1为磁悬浮定子铁芯图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请具体实施例及相应的附图对本申请技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例提供一种采用新型磁悬浮轴承结构的磁悬浮压缩机结构，如图1所示，包括磁悬浮后轴向轴承1；止推轴承2；磁悬浮前轴向轴承3；后滚珠轴承挡板4；后位移传感器组件5；后二级保护51；后位移传感器52；后滚珠轴承6；磁悬浮后径向轴承绕组7；磁悬浮后径向轴承定子8；磁悬浮后径向轴承转子9；电机定子绕组10；电机定子11；电机转子12；筒体13；磁悬浮前径向轴承定子绕组14；磁悬浮前径向轴承定子15；磁悬浮前径向轴承转子16；前位移传感器组件17；前二级保护171；前位移传感器172；前滚珠轴承挡板18；前滚珠轴承19；气动部件20；箱体21；转轴22。其中，将位移传感器与二级保护做成一体，并且作为滚珠轴承的支撑位置。
装配时，首先将滚珠轴承19/6装入位移传感器组件(在二级保护旁装入位移传感器探头，将位移传感器与二级保护做成一体)，用螺钉将滚珠轴承盖板锁紧在传感器组件上。
然后将筒体13加热，热套在电机定子11上，电机定子11与筒体13过盈量设计较大， 保证压缩机运行时电机定子受到转矩不会与筒体13产生相对位移；然后热套磁悬浮径向轴承，筒体13与磁悬浮径向轴承设计为小过盈量，径向轴承只受到径向力，小过盈量即可保证筒体13与磁悬浮径向轴承不会产生相对位移；接下来再热套位移传感器组件17/5，筒体13与位移传感器组件也是设计为小过盈配合，位移传感器一般只有启停机或轴运行失稳时，一级保护才会受到一定的径向力作用；在热套的过程中如果零件没有热套到位，可用液压机将零件压到指定的位置，当筒体13温度下降太快而零件还没有热套完成时，可将筒体13继续放进高温箱加热，但需注意加热温度必须小于筒体13上零件运行的最高温度(如发现热套完电机定子后，筒体13温度已经较低，不足以热套磁悬浮轴承定子时，可以继续加热筒体组件，但加热温度不能高于定子绕组允许的最高温度，否则会伤到漆包线，损坏导线与导线之间的绝缘)。
再将带有电机转子12和径向轴承转子16的转轴22装入筒体13；用螺钉将磁悬浮前轴向轴承定子3锁紧在筒体13上，在轴上热套止推轴承，用螺钉将后轴向轴承锁紧在筒体上；最后将箱体与筒体对接，装上气动零件部分，装上压缩机的端盖。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (13)

  1. 一种新型磁悬浮轴承结构，包括筒体(13)、转轴(22)、电机定子(11)、电机转子(12)、轴向轴承、径向轴承和位移传感装置，所述轴向轴承包括轴向轴承定子和轴向轴承转子，所述径向轴承包括径向轴承定子和径向轴承转子，所述电机转子(12)、轴向轴承转子、径向轴承转子套装在转轴(22)上，所述电机定子(11)套装在筒体(13)内；
    其特征在于：所述位移传感装置、轴向轴承定子、径向轴承定子直接固定在筒体(13)内壁上。
  2. 根据权利要求1所述的一种新型磁悬浮轴承结构，其特征在于：所述轴向轴承定子为磁悬浮后轴向轴承(1)和磁悬浮前轴向轴承(3)，所述轴向轴承转子为止推轴承(2)。
  3. 根据权利要求2所述的一种新型磁悬浮轴承结构，其特征在于：所述止推轴承(2)位于磁悬浮后轴向轴承(1)和磁悬浮前轴向轴承(3)之间。
  4. 根据权利要求1所述的一种新型磁悬浮轴承结构，其特征在于：所述径向轴承定子包括磁悬浮后径向轴承定子(8)和磁悬浮前径向轴承定子(15)，所述径向轴承转子包括磁悬浮后径向轴承转子(9)和磁悬浮前径向轴承转子(16)。
  5. 根据权利要求4所述的一种新型磁悬浮轴承结构，其特征在于：所述磁悬浮后径向轴承定子(8)和磁悬浮前径向轴承定子(15)固定设置在筒体(13)内，位于电机定子(11)两侧。
  6. 根据权利要求4所述的一种新型磁悬浮轴承结构，其特征在于：所述磁悬浮后径向轴承转子(9)和磁悬浮前径向轴承转子(16)套装在转轴(22)上，位于电机转子(12)两侧。
  7. 根据权利要求5所述的一种新型磁悬浮轴承结构，其特征在于：所述磁悬浮后径向轴承定子(8)和磁悬浮前径向轴承定子(15)上分别设置有磁悬浮后径向轴承绕组(7)和磁悬浮前径向轴承定子绕组(14)。
  8. 根据权利要求1所述的一种新型磁悬浮轴承结构，其特征在于：所述位移传感装置包括后位移传感器组件(5)和前位移传感器组件(17)。
  9. 根据权利要求8所述的一种新型磁悬浮轴承结构，其特征在于：所述后位移传感器组件(5)和前位移传感器组件(17)固定设置在筒体(13)内，分别位于磁悬浮后径向轴承定子(8)和磁悬浮前径向轴承定子(15)的两侧。
  10. 根据权利要求9所述的一种新型磁悬浮轴承结构，其特征在于：
    所述后位移传感器组件(5)的内径处设有后二级保护(51)和后位移传感器(52)；
    所述前位移传感器组件(17)的内径处设有前二级保护(171)和前位移传感器(172)。
  11. 根据权利要求10所述的一种新型磁悬浮轴承结构，其特征在于：所述后位移传感器组件(5)的内径处设有后滚珠轴承(6)；所述前位移传感器组件(17)的内径处设有前滚珠轴承(19)。
  12. 根据权利要求11所述的一种新型磁悬浮轴承结构，其特征在于：所述后滚珠轴承(6)的外侧设有后滚珠轴承挡板(4)；所述前滚珠轴承(19)的外侧设有前滚珠轴承挡板(18)。
  13. 一种新型磁悬浮压缩机结构，其特征在于，采用如权利要求1-12所述的一种新型磁悬浮轴承结构。
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