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WO2021004071A1 - 一种高速电机自抽热冷却结构 - Google Patents

一种高速电机自抽热冷却结构 Download PDF

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Publication number
WO2021004071A1
WO2021004071A1 PCT/CN2020/076597 CN2020076597W WO2021004071A1 WO 2021004071 A1 WO2021004071 A1 WO 2021004071A1 CN 2020076597 W CN2020076597 W CN 2020076597W WO 2021004071 A1 WO2021004071 A1 WO 2021004071A1
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WO
WIPO (PCT)
Prior art keywords
rotor shaft
stator
end cover
speed motor
shell
Prior art date
Application number
PCT/CN2020/076597
Other languages
English (en)
French (fr)
Inventor
黄俊锋
Original Assignee
泉州市华德机电设备有限公司
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Filing date
Publication date
Application filed by 泉州市华德机电设备有限公司 filed Critical 泉州市华德机电设备有限公司
Publication of WO2021004071A1 publication Critical patent/WO2021004071A1/zh

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Classifications

    • 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
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Definitions

  • the invention relates to the technical field of motors, in particular to a self-extracting heat cooling structure for high-speed motors.
  • a motor is a device that converts electrical energy into mechanical energy. It uses energized coils (that is, stator windings) to generate a rotating magnetic field and act on the rotor (such as a squirrel-cage closed aluminum frame) to form a magneto-electric power rotating torque.
  • DC motors There are different types of DC motors and AC motors. Most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors (the motor stator magnetic field speed and the rotor rotation speed do not maintain synchronous speed).
  • the motor is mainly composed of a stator and a rotor.
  • the direction of the force movement of the energized wire in the magnetic field is related to the direction of the current and the direction of the magnetic line of induction (the direction of the magnetic field).
  • the working principle of the motor is the action of the magnetic field on the current to make the motor rotate.
  • the commonly used high-speed motors all use water pumps to make surface cooling circulation systems, which require separate water pumps and heat dissipation systems.
  • the structure is relatively complicated, and the heat dissipation of the rotor shaft and bearings is not very ideal.
  • the heat dissipation is related to the stability and reliability of the overall motor operation. Poor heat dissipation of the rotor shaft and bearing during high-speed operation will cause the thermal expansion of the rotor shaft and bearing to cause the spindle to produce imbalance and bearing clearance changes, and the rotor shaft uses permanent magnets , High-speed operation will cause the rotor shaft to heat up.
  • the object of the present invention is to provide a self-extracting heat cooling structure for a high-speed motor to solve the problems raised in the background art.
  • a high-speed motor self-extracting heat cooling structure including a front end cover, a rear end cover, an outer shell and an air outlet shell, the inner surface of the front end cover is provided with an air hole groove, and the front end The middle ends of the inner surfaces of the cover and the rear end cover are respectively movably connected with a first rotor shaft and a second rotor shaft through bearings.
  • the outer surfaces of the first rotor shaft and the second rotor shaft are provided with a stator, and the stator and the first rotor
  • a magnetic steel is arranged between the shaft and the second rotor shaft, the left end of the outer surface of the second rotor shaft is sleeved with an inner fixed plate of the wind shell, and the left side of the inner fixed plate of the wind shell is fixedly connected with an impeller.
  • the inner surface is provided with a stator coil, and the outer surface of the stator is provided with a stator fixing flange, the left side of the front end cover is connected with the housing by a fastening screw, and the inner surface of the housing is provided with a notch, and the left side of the housing passes tightly.
  • a wind shell connecting flange is connected with a fixed screw, the inner surface of the wind shell connecting flange is provided with a rear end cover, and the left side of the wind shell connecting flange is connected with an air outlet wind shell through a fastening screw.
  • the number of the air hole grooves is four, and the four air hole grooves are arranged at an equal angle.
  • stator fixing flange and the housing are connected by strips, the number of strips is four, and the four strips are arranged horizontally and diagonally.
  • connection between the front end cover and the first rotor shaft and the connection between the back end cover and the second rotor shaft are provided with a bearing pressure plate, and the front end cover, the magnet, the second rotor shaft and the bearing pressure plate are also Reserve an air duct.
  • the number of the notches is eight, and the distance between every two adjacent notches is the same.
  • the invention has air vent slots on the inner surface of the front end cover, and through the action of the magnetic steel, the fixed plate in the wind casing, the impeller and the notches, the four air vent slots connected by the front end cover are sucked into the inside of the shell and the eight slots opened on the shell The airflow from the port is sucked in together.
  • the stator and the stator fixing flange and the shell are welded horizontally and diagonally at the four diagonal corners through four strips, and there are no obstructions in the middle, thus forming four large channels. The large channel flows through and takes away the heat from the outer ring of the stator.
  • the inhaled air flow can directly pass through and transfer the stator, first and second rotor shafts.
  • the heat in the rotor shaft and the shell is taken away.
  • the air hole grooves flow to take away the heat of the bearing, and the air duct reserved between the front end cover, the magnet, the second rotor shaft and the bearing plate also removes the heat of the bearing .
  • the air casing connecting flange directly sends the hot air to the impeller until the hot air is discharged from the outlet air casing, and continues to run in this way, so that the temperature of the rotor shaft is controlled within the range that does not affect the operation, and the The stability and safety of the whole machine.
  • this structure can change the heat dissipation and cooling problems of the high-speed motor without changing the structure of the high-speed motor, and can reduce the temperature rise of the rotor shaft and the space of the
  • Figure 1 is a schematic diagram of the structure of the present invention.
  • the fixing plate 11, the stator fixing flange 12, the impeller 13, the air outlet shell 14, the strip 15, the magnetic steel 16, and the second rotor shaft 17 are all common standard parts or parts known to those skilled in the art, and their structure and principle All these technicians can know through technical manuals or through conventional experimental methods.
  • a high-speed motor self-extracting heat and cooling structure including a front cover 1, a rear cover 2, a shell 5 and an air outlet shell 14.
  • the inner surface of the front cover 1 is provided with air hole slots 4, the number of air hole slots 4 There are four, and the four air hole slots 4 are arranged at equal angles, and the middle ends of the inner surfaces of the front end cover 1 and the rear end cover 2 are respectively movably connected with the first rotor shaft 7 and the second rotor shaft 17 through bearings.
  • connection between the cover 1 and the first rotor shaft 7 and the connection between the back end cover 2 and the second rotor shaft 17 are both provided with a bearing pressing plate 8, and the front end cover 1, the magnetic steel 16, the second rotor shaft 17 and the bearing pressing plate 8
  • An air duct is reserved between the bearings to extract heat from the bearing and further improve its heat dissipation effect.
  • the outer surfaces of the first rotor shaft 7 and the second rotor shaft 17 are provided with a stator 3, and the stator 3 is connected to the first rotor shaft.
  • a magnetic steel 16 is arranged between 7 and the second rotor shaft 17, the left end of the outer surface of the second rotor shaft 17 is sleeved with a wind casing inner fixing plate 11, and the left side of the wind casing inner fixing plate 11 is fixedly connected with an impeller 13,
  • the inner surface of the stator 3 is provided with a stator coil 6, and the outer surface of the stator 3 is provided with a stator fixing flange 12, the stator fixing flange 12 and the housing 5 are connected by a strip 15 and the number of the strip 15 is four.
  • the four strips 15 are arranged horizontally and diagonally, the left side of the front cover 1 is connected with the housing 5 by fastening screws, and the inner surface of the housing 5 is provided with notches 10, and the front cover 1 is connected with four air holes. 4
  • the air drawn into the inside of the shell 5 and the eight slots 10 opened on the shell 5 is sucked in together.
  • the stator 3 and the stator fixing flange 12 are welded to the shell 5 horizontally and diagonally by four strips 15 at four opposite corners, and There are no obstructions in the middle, thus forming four large channels.
  • the inhaled air flows through the four large channels and takes away the heat from the outer ring of the stator 3, because the stator 3 is between the first rotor shaft 7 and the second rotor shaft 17 There is a magnetic steel 16 between them, and the air drawn in can directly pass through and take away the heat in the stator 3, the first rotor shaft 7, the second rotor shaft 17 and the housing 5. At the same time, the air hole groove 4 flows to take away the heat of the bearing.
  • the air shell connecting flange 9 directly sends the hot air to the impeller 13 until the hot air is discharged from the air outlet air shell 14, and continues to operate in this way, so that the temperature of the rotor shaft is controlled within the range that does not affect the operation, and the stability of the whole machine is improved At the same time, this structure can change the heat dissipation and cooling problems of the high-speed motor without changing the structure of the high-speed motor, and can reduce the temperature rise of the rotor shaft and the high-speed motor space without additional equipment.
  • the number of slots 10 is Eight, and the distance between every two adjacent notches 10 is the same.
  • the left side of the housing 5 is connected with a wind shell connecting flange 9 by fastening screws, and the inner surface of the wind shell connecting flange 9 is provided with a rear end
  • the cover 2 and the left side of the wind shell connecting flange 9 are connected with the outlet wind shell 14 by fastening screws.
  • the bearings including mechanical bearings, air bearings, and magnetic bearings can all be cooled by this solution.
  • an air hole slot 4 is opened on the inner surface of the front end cover 1, and the four air hole slots 4 connected to the front end cover 1 are sucked into the shell by the action of the magnetic steel 16, the inner fixing plate 11 of the wind casing, the impeller 13 and the slot 10 5
  • the airflow from the eight slots 10 in the interior and the housing 5 is sucked in together.
  • the stator 3 and the stator fixing flange 12 are welded to the housing 5 through four strips 15 horizontally and diagonally at four diagonal corners, and there is no obstruction in the middle. In this way, four large channels are formed.
  • the inhaled air flows through the four large channels and takes away the heat from the outer ring of the stator 3, because there is a space between the stator 3 and the first rotor shaft 7 and the second rotor shaft 17.
  • Magnetic steel 16 the inhaled air flow can directly pass and take away the heat in the stator 3, the first rotor shaft 7, the second rotor shaft 17 and the casing 5.
  • the air hole groove 4 flows to take away the heat of the bearing, and the front end cover 1.
  • the air duct reserved between the magnetic steel 16, the second rotor shaft 17 and the bearing plate 8 also draws away the heat of the bearing to further improve its heat dissipation effect.
  • the air casing connecting flange 9 directly sends the hot air to the impeller 13 Until the hot air is discharged from the air outlet shell 14, and continue to run in this way, so that the temperature of the rotor shaft is controlled within the range that does not affect the operation, and the stability and safety of the whole machine are improved.
  • the structure does not change the high-speed motor
  • the structure can change the heat dissipation and cooling problems of the high-speed motor, and can reduce the temperature rise of the rotor shaft and the space of the high-speed motor without additional equipment.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

本发明公开了一种高速电机自抽热冷却结构，包括前端盖、后端盖、外壳和出气风壳，所述前端盖的内表面开设有气孔槽，且前端盖和后端盖内表面的中端通过轴承分别活动连接有第一转子轴和第二转子轴，所述第一转子轴和第二转子轴的外表面设置有定子，且第一转子轴和第二转子轴之间设置一个磁钢。本发明在前端盖的内表面开设了气孔槽，并通过外壳、风壳内固定板、叶轮和槽口的作用，可使转子轴与轴承的温度控制在不影响运行的范围内，提高整机的稳定性和安全性，同时，本结构不改变高速电机结构情况下能够解决高速电机定子、转子、轴承散热和冷却问题，不需要额外的设备就能够降低高速电机的温升问题。

Description

一种高速电机自抽热冷却结构 技术领域
本发明涉及电机技术领域，具体为一种高速电机自抽热冷却结构。
 背景技术
电机是把电能转换成机械能的一种设备，它是利用通电线圈（也就是定子绕组）产生旋转磁场并作用于转子（如鼠笼式闭合铝框）形成磁电动力旋转扭矩，电机按使用电源不同分为直流电机和交流电机，电力系统中的电机大部分是交流电机，可以是同步电机或者是异步电机（电机定子磁场转速与转子旋转转速不保持同步速），电机主要由定子与转子组成，通电导线在磁场中受力运动的方向跟电流方向和磁感线（磁场方向）方向有关，电机工作原理是磁场对电流受力的作用，使电机转动。
 技术问题
目前常用的高速电机都是利用水泵来做表面冷却的循环系统，需要单独的水泵、散热系统，结构相对来说比较复杂，且对于转子轴和轴承的散热性还不是很理想，转子轴和轴承的散热关系到整体的电机运行的稳定性和可靠性，高速运行时转子轴和轴承散热不好会导致转子轴和轴承热膨胀使主轴产生不平衡量及轴承间隙变化，且转子轴使用的是永磁体，高速运转会造成转子轴升温，没有冷却的情况下会对永磁体产生很大的影响，并且会造成永磁体严重退磁导致电机性能下降，所以转子轴和轴承的散热关系到整体可靠性，为此，我们提出一种高速电机自抽热冷却结构。
 技术解决方案
本发明的目的在于提供一种高速电机自抽热冷却结构，以解决上述背景技术中提出的问题。
为实现上述目的，本发明提供如下技术方案：一种高速电机自抽热冷却结构，包括前端盖、后端盖、外壳和出气风壳，所述前端盖的内表面开设有气孔槽，且前端盖和后端盖内表面的中端通过轴承分别活动连接有第一转子轴和第二转子轴，所述第一转子轴和第二转子轴的外表面设置有定子，且定子与第一转子轴和第二转子轴之间设置一个磁钢，所述第二转子轴外表面的左端套接有风壳内固定板，且风壳内固定板的左侧固定连接有叶轮，所述定子的内表面设置有定子线圈，且定子的外表面设置有定子固定法兰，所述前端盖的左侧通过紧固螺丝与外壳连接，且外壳的内表面开设有槽口，外壳的左侧通过紧固螺丝连接有风壳连接法兰，所述风壳连接法兰的内表面设置有后端盖，且风壳连接法兰的左侧通过紧固螺丝连接有出气风壳。
优选的，所述气孔槽的数量为四个，且四个气孔槽之间为等角度设置。
优选的，所述定子固定法兰与外壳之间通过条板连接，条板的数量为四个，且四个条板之间为水平对角设置。
优选的，所述前端盖与第一转子轴的连接处以及后端盖与第二转子轴的连接处均设置有轴承压板，且前端盖、磁钢、第二转子轴和轴承压板之间还预留有风道。
优选的，所述槽口的数量为八个，且每两个相邻槽口之间的距离均相同。
 有益效果
与现有技术相比，本发明的有益效果如下：
本发明在前端盖的内表面开设了气孔槽，并通过磁钢、风壳内固定板、叶轮和槽口的作用，前端盖连接的四个气孔槽吸入外壳内部及外壳上开设的八个槽口的气流一起吸入，定子和定子固定法兰与外壳通过四个条板水平对角焊接在四个对角处，且中间无遮挡物，从而形成四个大的通道，吸入的气流从四个大的通道流过并带走定子外圈的热量，因为定子与第一转子轴和第二转子轴之间设置一个磁钢，吸入的气流可以直接通过并把定子、第一转子轴、第二转子轴和外壳内的热量带走，同时，气孔槽流动带走轴承的热量，且前端盖、磁钢、第二转子轴和轴承压板之间所预留的风道也将轴承的热量抽走，进一步提高其散热效果，风壳连接法兰直接把热气送到叶轮处直至把热气从出气风壳处排出，并一直这样运行下去，使转子轴的温度控制在不影响运行的范围内，提高整机的稳定性和安全性，同时，本结构不改变高速电机结构情况下能够改变高速电机散热和冷却问题，不需要额外的设备就能够降低转子轴和高速电机空间的温升问题。
 附图说明
图1为本发明结构示意图。
图中：1前端盖、2后端盖、3定子、4气孔槽、5外壳、6定子线圈、7第一转子轴、8轴承压板、9风壳连接法兰、10槽口、11风壳内固定板、12定子固定法兰、13叶轮、14出气风壳、15条板、16磁钢、17第二转子轴。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，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，都属于本发明保护的范围。
在申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“设置有”、“连接”等，应做广义理解，例如“连接”，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
本发明的前端盖1、后端盖2、定子3、气孔槽4、外壳5、定子线圈6、第一转子轴7、轴承压板8、风壳连接法兰9、槽口10、风壳内固定板11、定子固定法兰12、叶轮13、出气风壳14、条板15、磁钢16和第二转子轴17部件均为通用标准件或本领域技术人员知晓的部件，其结构和原理都为本技术人员均可通过技术手册得知或通过常规实验方法获知。
请参阅图1，一种高速电机自抽热冷却结构，包括前端盖1、后端盖2、外壳5和出气风壳14，前端盖1的内表面开设有气孔槽4，气孔槽4的数量为四个，且四个气孔槽4之间为等角度设置，且前端盖1和后端盖2内表面的中端通过轴承分别活动连接有第一转子轴7和第二转子轴17，前端盖1与第一转子轴7的连接处以及后端盖2与第二转子轴17的连接处均设置有轴承压板8，且前端盖1、磁钢16、第二转子轴17和轴承压板8之间还预留有风道，可将轴承的热量抽走，进一步提高其散热效果，第一转子轴7和第二转子轴17的外表面设置有定子3，且定子3与第一转子轴7和第二转子轴17之间设置一个磁钢16，第二转子轴17外表面的左端套接有风壳内固定板11，且风壳内固定板11的左侧固定连接有叶轮13，定子3的内表面设置有定子线圈6，且定子3的外表面设置有定子固定法兰12，定子固定法兰12与外壳5之间通过条板15连接，条板15的数量为四个，且四个条板15之间为水平对角设置，前端盖1的左侧通过紧固螺丝与外壳5连接，且外壳5的内表面开设有槽口10，前端盖1连接的四个气孔槽4吸入外壳5内部及外壳5上开设的八个槽口10的气流一起吸入，定子3和定子固定法兰12与外壳5通过四个条板15水平对角焊接在四个对角处，且中间无遮挡物，从而形成四个大的通道，吸入的气流从四个大的通道流过并带走定子3外圈的热量，因为定子3与第一转子轴7和第二转子轴17之间设置一个磁钢16，吸入的气流可以直接通过并把定子3、第一转子轴7、第二转子轴17和外壳5内的热量带走，同时，气孔槽4流动带走轴承的热量，风壳连接法兰9直接把热气送到叶轮13处直至把热气从出气风壳14处排出，并一直这样运行下去，使转子轴的温度控制在不影响运行的范围内，提高整机的稳定性和安全性，同时，本结构不改变高速电机结构情况下能够改变高速电机散热和冷却问题，不需要额外的设备就能够降低转子轴和高速电机空间的温升问题，槽口10的数量为八个，且每两个相邻槽口10之间的距离均相同，外壳5的左侧通过紧固螺丝连接有风壳连接法兰9，风壳连接法兰9的内表面设置有后端盖2，且风壳连接法兰9的左侧通过紧固螺丝连接有出气风壳14，轴承包含机械轴承、空气轴承、磁悬浮轴承都可以用本方案冷却结构。
使用时，在前端盖1的内表面开设了气孔槽4，并通过磁钢16、风壳内固定板11、叶轮13和槽口10的作用，前端盖1连接的四个气孔槽4吸入外壳5内部及外壳5上开设的八个槽口10的气流一起吸入，定子3和定子固定法兰12与外壳5通过四个条板15水平对角焊接在四个对角处，且中间无遮挡物，从而形成四个大的通道，吸入的气流从四个大的通道流过并带走定子3外圈的热量，因为定子3与第一转子轴7和第二转子轴17之间设置一个磁钢16，吸入的气流可以直接通过并把定子3、第一转子轴7、第二转子轴17和外壳5内的热量带走，同时，气孔槽4流动带走轴承的热量，且前端盖1、磁钢16、第二转子轴17和轴承压板8之间所预留的风道也将轴承的热量抽走，进一步提高其散热效果，风壳连接法兰9直接把热气送到叶轮13处直至把热气从出气风壳14处排出，并一直这样运行下去，使转子轴的温度控制在不影响运行的范围内，提高整机的稳定性和安全性，同时，本结构不改变高速电机结构情况下能够改变高速电机散热和冷却问题，不需要额外的设备就能够降低转子轴和高速电机空间的温升问题。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。

Claims (5)

  1. 一种高速电机自抽热冷却结构，包括前端盖（1）、后端盖（2）、外壳（5）和出气风壳（14），其特征在于：所述前端盖（1）的内表面开设有气孔槽（4），且前端盖（1）和后端盖（2）内表面的中端通过轴承分别活动连接有第一转子轴（7）和第二转子轴（17），所述第一转子轴（7）和第二转子轴（17）的外表面设置有定子（3），且定子（3）与第一转子轴（7）和第二转子轴（17）之间设置一个磁钢（16），所述第二转子轴（17）外表面的左端套接有风壳内固定板（11），且风壳内固定板（11）的左侧固定连接有叶轮（13），所述定子（3）的内表面设置有定子线圈（6），且定子（3）的外表面设置有定子固定法兰（12），所述前端盖（1）的左侧通过紧固螺丝与外壳（5）连接，且外壳（5）的内表面开设有槽口（10），外壳（5）的左侧通过紧固螺丝连接有风壳连接法兰（9），所述风壳连接法兰（9）的内表面设置有后端盖（2），且风壳连接法兰（9）的左侧通过紧固螺丝连接有出气风壳（14）。
  2. 根据权利要求1所述的一种高速电机自抽热冷却结构，其特征在于：所述气孔槽（4）的数量为四个，且四个气孔槽（4）之间为等角度设置。
  3. 根据权利要求1所述的一种高速电机自抽热冷却结构，其特征在于：所述定子固定法兰（12）与外壳（5）之间通过条板（15）连接，条板（15）的数量为四个，且四个条板（15）之间为水平对角设置。
  4. 根据权利要求1所述的一种高速电机自抽热冷却结构，其特征在于：所述前端盖（1）与第一转子轴（7）的连接处以及后端盖（2）与第二转子轴（17）的连接处均设置有轴承压板（8），且前端盖（1）、磁钢（16）、第二转子轴（17）和轴承压板（8）之间还预留有风道。
  5. 根据权利要求1所述的一种高速电机自抽热冷却结构，其特征在于：所述槽口（10）的数量为八个，且每两个相邻槽口（10）之间的距离均相同。
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