WO2021114491A1 - 一种磁悬浮离心机磁轴承的安装结构 - Google Patents

一种磁悬浮离心机磁轴承的安装结构 Download PDF

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Publication number
WO2021114491A1
WO2021114491A1 PCT/CN2020/077351 CN2020077351W WO2021114491A1 WO 2021114491 A1 WO2021114491 A1 WO 2021114491A1 CN 2020077351 W CN2020077351 W CN 2020077351W WO 2021114491 A1 WO2021114491 A1 WO 2021114491A1
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WIPO (PCT)
Prior art keywords
bearing
magnetic
axial electromagnetic
rotor core
core shaft
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PCT/CN2020/077351
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English (en)
French (fr)
Inventor
林英哲
刘淑云
吴立华
董继勇
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南京磁谷科技股份有限公司
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Publication of WO2021114491A1 publication Critical patent/WO2021114491A1/zh

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    • 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
    • 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
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the utility model belongs to the field of magnetic levitation centrifuges, and particularly relates to an installation structure of a magnetic bearing of a magnetic levitation centrifuge.
  • Magnetic levitation technology means that the magnetic bearing and positioning sensor use the numerical control magnetic bearing system to realize the frictionless movement of the moving parts of the compressor on the magnetic liner.
  • the numerical control magnetic bearing system is composed of radial bearings and axial bearings, radial bearings and
  • the axial bearing is composed of permanent magnets and electromagnets.
  • the positioning sensor on the magnetic bearing provides ultra-high-speed real-time repositioning of the motor rotor to ensure precise positioning.
  • both the radial bearing and the axial bearing are installed in the casing of the magnetic levitation centrifuge, resulting in a large overall structure of the motor, a relatively complex internal structure, and heavier weight.
  • the utility model discloses a mounting structure for the magnetic bearing of a magnetic levitation centrifuge.
  • the utility model adopts the following technical solution: a magnetic bearing installation structure of a magnetic levitation centrifuge, including an air inlet, an impeller, a stator, a first axial electromagnetic bearing, a second axial electromagnetic bearing, and a first permanent magnet diameter Magnetic bearing, second permanent magnetic radial magnetic bearing, casing and rotor core shaft; among them, a stator is arranged inside the casing, the rotor core shaft penetrates the stator and extends out of the casing, and the rotor core shaft is located at both ends of the inside of the casing
  • the first axial electromagnetic bearing and the second axial electromagnetic bearing are respectively arranged.
  • the inner surface of the second axial electromagnetic bearing is provided with a first permanent magnetic radial magnetic bearing, and an impeller is arranged on the outer side of the casing away from the first permanent magnetic radial magnetic bearing.
  • the outer circumference of the rotor core shaft located outside the impeller and inside the inlet is provided with a second permanent magnet radial magnetic bearing.
  • the second axial electromagnetic bearing and the first permanent magnet radial magnetic bearing of the present invention are provided with end caps on the outer periphery.
  • the utility model transfers one of the permanent magnetic radial magnetic bearings of the magnetic levitation centrifuge from the casing to the air inlet, so that the length of the casing is shortened, and the overall structure and size of the motor are reduced; the inside of the casing The structure is simpler and easy to disassemble; the length of the thickest part of the outer diameter of the motor rotor is shortened, and the weight is lighter.
  • Figure 1 is a structural diagram of the position installation of the magnetic bearing of the utility model
  • Figure 2 is a structural diagram in the direction A in Figure 1;
  • Figure 3 is a structural diagram of the positional installation of a magnetic bearing in the prior art
  • the utility model discloses a magnetic bearing installation structure of a magnetic levitation centrifuge, which includes an air inlet 1, an impeller 2, a stator 3, a first axial electromagnetic bearing 4, a second axial electromagnetic bearing 5, and a first permanent magnet radial
  • the two ends of the rotor core shaft 10 located inside the casing 9 are respectively provided with a first axial electromagnetic bearing 4 and a second axial electromagnetic bearing 5, and the inner surface of the second axial electromagnetic bearing 5 is provided with a first permanent magnetic radial magnetic bearing.
  • the outer periphery of the second axial electromagnetic bearing 5 and the first permanent magnetic radial magnetic bearing 6 is provided with an end cover 8, and an impeller 2 is provided on the outer side of the casing 9 away from the first permanent magnetic radial magnetic bearing 6, which is located outside the impeller 2
  • a second permanent magnet radial magnetic bearing 7 is arranged on the outer circumference of the rotor core shaft 10 inside the intake duct 1.
  • the second permanent magnet radial magnetic bearing 7 is fixed on the duct wall of the intake duct by screws.
  • the first axial electromagnetic bearing 4 and the second axial electromagnetic bearing 5 cooperate with each other to control the axial position of the rotor core shaft 10.
  • the first permanent magnetic radial magnetic bearing 6 and the second permanent magnetic radial magnetic bearing 7 Mutual cooperation controls the radial position of the rotor core shaft 10 to ensure that the rotor core shaft 10 rotates in a certain space, and the rotor core shaft 10 drives the impeller 2 to rotate, and the air is introduced into the air inlet 1 to take away the magnetic bearing. The heat.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

本实用新型公开了一种磁悬浮离心机磁轴承的安装结构，包括进气道、叶轮、定子、第一轴向电磁轴承、第二轴向电磁轴承、第一永磁径向磁轴承、第二永磁径向磁轴承、机壳和转子芯轴；其中，机壳内设置定子，转子芯轴贯穿定子并延伸出机壳外，转子芯轴位于机壳内的两端设置第一轴向电磁轴承和第二轴向电磁轴承，第二轴向电磁轴承内侧面设置第一永磁径向磁轴承，机壳一端外侧设置叶轮，位于叶轮外侧、进气道内侧的转子芯轴外设置第二永磁径向磁轴承。本实用新型通过改变第二永磁径向磁轴承的安装位置，使得电机的总体结构及尺寸变小；机壳的内部结构更加简单，容易拆装；电机转子的外径最粗部分的长度变短，质量变轻。

Description

一种磁悬浮离心机磁轴承的安装结构 技术领域
本实用新型属于磁悬浮离心机领域，具体涉及一种磁悬浮离心机磁轴承的安装结构。
背景技术
磁悬浮技术是指，磁轴承和定位传感器利用数控磁轴承系统实现压缩机的运动部件悬浮在磁衬上进行无摩擦的运动，数控磁轴承系统由径向轴承和轴向轴承组成，径向轴承和轴向轴承由永久磁铁和电磁铁组成，磁轴承上的定位传感器为电机转子提供超高速的实时重新定位，以确保精确定位。
现有技术中，径向轴承和轴向轴承均安装在磁悬浮离心机的机壳内，导致电机的总体结构较大，内部结构较为复杂，质量较重。
实用新型内容
技术目的：针对现有技术中存在的问题，本实用新型公开了一种磁悬浮离心机磁轴承的安装结构。
技术方案：本实用新型采用如下技术方案：一种磁悬浮离心机磁轴承的安装结构，包括进气道、叶轮、定子、第一轴向电磁轴承、第二轴向电磁轴承、第一永磁径向磁轴承、第二永磁径向磁轴承、机壳和转子芯轴；其中，机壳内侧设置定子，转子芯轴贯穿定子并延伸出机壳外，转子芯轴位于机壳内部的两端分别设置第一轴向电磁轴承和第二轴向电磁轴承，第二轴向电磁轴承内侧面设置第一永磁径向磁轴承，远离第一永磁径向磁轴承的机壳一端外侧设置叶轮，位于叶轮外侧、进气道内侧的转子芯轴的外周设置第二永磁径向磁轴承。
优选的，本实用新型第二轴向电磁轴承和第一永磁径向磁轴承的外周设置端盖。
有益效果：本实用新型将磁悬浮离心机的其中一个永磁径向磁轴承从机壳内转移到进气道内，使得机壳的长度变短，电机的总体结构及尺寸变小；机壳的内部结构更加简单，容易拆装；电机转子的外径最粗部分的长度变短，质量变轻。
附图说明
图1为本实用新型的磁轴承的位置安装结构图；
图2为图1中A方向的结构图；
图3为现有技术中磁轴承的位置安装结构图；
其中，进气道1，叶轮2，定子3，第一轴向电磁轴承4，第二轴向电磁轴承5，第一永 磁径向磁轴承6，第二永磁径向磁轴承7，端盖8，机壳9，转子芯轴10。
具体实施方式
下面结合附图对本实用新型作更进一步的说明。
本实用新型公开了一种磁悬浮离心机磁轴承的安装结构，包括进气道1、叶轮2、定子3、第一轴向电磁轴承4、第二轴向电磁轴承5、第一永磁径向磁轴承6、第二永磁径向磁轴承7、端盖8、机壳9和转子芯轴10；其中，机壳9内侧设置定子3，转子芯轴10贯穿定子3并延伸出机壳9外，转子芯轴10位于机壳9内部的两端分别设置第一轴向电磁轴承4和第二轴向电磁轴承5，第二轴向电磁轴承5内侧面设置第一永磁径向磁轴承6，第二轴向电磁轴承5和第一永磁径向磁轴承6的外周设置端盖8，远离第一永磁径向磁轴承6的机壳9一端外侧设置叶轮2，位于叶轮2外侧、进气道1内侧的转子芯轴10的外周设置第二永磁径向磁轴承7，本实施例中第二永磁径向磁轴承7通过螺钉固定在进气道管壁上。
本实用新型中，第一轴向电磁轴承4和第二轴向电磁轴承5相互配合控制转子芯轴10的轴向位置，第一永磁径向磁轴承6和第二永磁径向磁轴承7相互配合控制转子芯轴10的径向位置，保证了转子芯轴10在一定的空间内进行转动，并且转子芯轴10带动叶轮2转动，进气道1内通入气体带走磁轴承产生的热量。
以上所述仅是本实用新型的优选实施方式，应当指出：对于本技术领域的普通技术人员来说，在不脱离本实用新型原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本实用新型的保护范围。

Claims (2)

  1. 一种磁悬浮离心机磁轴承的安装结构，其特征在于，包括进气道(1)、叶轮(2)、定子(3)、第一轴向电磁轴承(4)、第二轴向电磁轴承(5)、第一永磁径向磁轴承(6)、第二永磁径向磁轴承(7)、机壳(9)和转子芯轴(10)；其中，所述机壳(9)内侧设置定子(3)，所述转子芯轴(10)贯穿定子(3)并延伸出机壳(9)外，所述转子芯轴(10)位于机壳(9)内部的两端分别设置第一轴向电磁轴承(4)和第二轴向电磁轴承(5)，所述第二轴向电磁轴承(5)内侧面设置第一永磁径向磁轴承(6)，远离所述第一永磁径向磁轴承(6)的机壳(9)一端外侧设置叶轮(2)，位于叶轮(2)外侧、进气道(1)内侧的转子芯轴(10)的外周设置第二永磁径向磁轴承(7)。
  2. 根据权利要求1所述的一种磁悬浮离心机磁轴承的安装结构，其特征在于，所述第二轴向电磁轴承(5)和第一永磁径向磁轴承(6)的外周设置端盖(8)。
PCT/CN2020/077351 2019-12-13 2020-02-29 一种磁悬浮离心机磁轴承的安装结构 WO2021114491A1 (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115501794A (zh) * 2022-09-27 2022-12-23 浙江博业机械科技有限公司 一种使用磁悬浮技术的磁力搅拌器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6201329B1 (en) * 1997-10-27 2001-03-13 Mohawk Innovative Technology, Inc. Pump having magnetic bearing for pumping blood and the like
US20110164974A1 (en) * 2008-08-18 2011-07-07 Daimler Ag Compressor and Method for Operating a Compressor and Fuel Cell Device with a Compressor
EP2784326A1 (en) * 2013-03-25 2014-10-01 Skf Magnetic Mechatronics Compact turbomachine with magnetic bearings and auxiliary bearings
CN105715315A (zh) * 2014-12-19 2016-06-29 松下知识产权经营株式会社 涡轮机
CN208353156U (zh) * 2018-03-15 2019-01-08 山东天瑞重工有限公司 一种新型磁悬浮压缩机用冷却装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6201329B1 (en) * 1997-10-27 2001-03-13 Mohawk Innovative Technology, Inc. Pump having magnetic bearing for pumping blood and the like
US20110164974A1 (en) * 2008-08-18 2011-07-07 Daimler Ag Compressor and Method for Operating a Compressor and Fuel Cell Device with a Compressor
EP2784326A1 (en) * 2013-03-25 2014-10-01 Skf Magnetic Mechatronics Compact turbomachine with magnetic bearings and auxiliary bearings
CN105715315A (zh) * 2014-12-19 2016-06-29 松下知识产权经营株式会社 涡轮机
CN208353156U (zh) * 2018-03-15 2019-01-08 山东天瑞重工有限公司 一种新型磁悬浮压缩机用冷却装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115501794A (zh) * 2022-09-27 2022-12-23 浙江博业机械科技有限公司 一种使用磁悬浮技术的磁力搅拌器

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