WO2022110436A1 - 无刷直流水泵 - Google Patents

无刷直流水泵 Download PDF

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Publication number
WO2022110436A1
WO2022110436A1 PCT/CN2020/139239 CN2020139239W WO2022110436A1 WO 2022110436 A1 WO2022110436 A1 WO 2022110436A1 CN 2020139239 W CN2020139239 W CN 2020139239W WO 2022110436 A1 WO2022110436 A1 WO 2022110436A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
water pump
coil
brushless
rotating shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/139239
Other languages
English (en)
French (fr)
Inventor
许德涛
张奇
凌芳华
杨森森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Microtech Changzhou Co Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Microtech Changzhou Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AAC Acoustic Technologies Shenzhen Co Ltd, AAC Microtech Changzhou Co Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022110436A1 publication Critical patent/WO2022110436A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0693—Details or arrangements of the wiring
    • 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
    • F04D29/08—Sealings
    • F04D29/086—Sealings especially adapted for liquid 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid 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
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos

Definitions

  • the present application relates to the technical field of water pumps, and more particularly, to a brushless DC water pump.
  • the micro brushless DC water pump includes an impeller and a motor assembly that drives the impeller to rotate.
  • the motor assembly is driven by a coil and a magnetic steel. Using the electromagnetic principle, the coil is energized to generate an alternating magnetic field, which interacts with the magnetic steel to make the impeller rotate, thereby driving the fluid circulation. .
  • the coil is arranged outside the water pump casing, the magnetic steel is arranged in the casing, and a casing is spaced between the coil and the magnetic steel. Due to the thickness of the casing, it not only occupies a large space, but also reduces the space utilization rate of the coil. This results in a larger magnetic gap between the magnet and the coil, reducing the driving force.
  • the purpose of the present application is to provide a brushless DC water pump, which can increase the space utilization rate of the coil, reduce the magnetic gap, and improve the driving force.
  • the casing between the permanent magnets and the coil windings in the prior art is removed, which not only increases the space utilization of the coils, but also reduces the magnetic gap between the permanent magnets and the coil windings , improve driving force.
  • FIG. 1 is a schematic diagram of an explosion structure of a brushless DC water pump according to a specific embodiment of the application.
  • FIG. 2 is a schematic diagram of the overall structure of the brushless DC water pump shown in FIG. 1 .
  • FIG. 3 is a schematic diagram of a cross-sectional structure along the direction A-A in FIG. 2 .
  • FIG. 4 is a schematic structural diagram of the permanent magnet and the coil winding in FIG. 1 .
  • FIG. 5 is a schematic structural diagram of FIG. 2 after removing the upper casing.
  • FIG. 6 is a schematic structural diagram of FIG. 2 with the upper casing and the impeller assembly removed.
  • FIG. 7 is a schematic circuit diagram of the star connection method adopted by the coil.
  • FIG. 8 is a schematic circuit diagram of the delta connection method adopted by the coil.
  • the present application discloses a brushless DC water pump, comprising a housing 10 with a cooling cavity, an impeller assembly 30 , a permanent magnet 40 and a coil winding 50 all disposed in the cooling cavity, and the permanent magnet 40 is fixed
  • the coil winding 50 is fixed to the casing 10 by gluing
  • the permanent magnet 40 and the coil winding 50 are arranged opposite to each other, and the coil winding 50 is energized to make the permanent magnet 40 rotate, and the rotation of the permanent magnet 40 drives the impeller assembly 30 to surround the coil winding 50 the central axis of rotation.
  • the coil winding 50 is also arranged in the cooling cavity, and the housing 10 between the permanent magnet 40 and the coil winding 50 in the prior art is removed, which not only increases the space utilization of the coil 52, but also reduces the permanent magnet 40 and the coil winding.
  • the magnetic gap between 50 improves the driving force.
  • the driving performance of the water pump can be improved by increasing the number of turns of the coil 52 and increasing the magnetic flux of the permanent magnet 40 to generate a stronger magnetic field and generate a larger driving force.
  • the brushless DC water pump further includes a circuit board 70 disposed outside the casing 10 .
  • the circuit board 70 supplies power to the coil winding 50 , and the circuit board 70 and the coil winding 50 are connected by wires 71 , and the casing 10 is connected to the circuit board 70 .
  • both the circuit board 70 and the wires 71 are arranged in the grooves of the casing 10 .
  • the housing 10 is provided with a mounting seat protruding from the surface of the housing 10 for mounting the rotating shaft 20 , the mounting seat is provided with a mounting hole, and the rotating shaft 20 is fixed in the mounting hole.
  • the impeller assembly 30 includes a shaft sleeve 31 sleeved on the rotating shaft 20 , a side plate 32 disposed opposite to the shaft sleeve 31 at intervals, and a connection between the shaft sleeve 31 and the side plate 32 .
  • the magnetic conductor 51 includes a yoke portion 511 fixed to the housing 10 , a tooth portion 512 extending along the yoke portion 511 in a direction perpendicular to the rotation axis 20 and away from the rotation axis 20 , and a tooth portion 512 disposed on the
  • the end plate 513 of the end portion of the tooth portion 512 facing away from the yoke portion 511 is wound around the tooth portion 512 with the coil 52 , and the end plate 513 is arranged opposite to the permanent magnet 40 at a distance.
  • the end plates 513 extend to both sides in the circumferential direction of the rotating shaft 20 to enlarge the surface area facing the permanent magnet 40 and improve the driving force.
  • the permanent magnet 40 is a ring-shaped permanent magnet 40
  • the ring-shaped permanent magnet 40 may be a ring-shaped permanent magnet formed by a plurality of intermittent permanent magnets and surrounding the coil winding 50, or may be a closed ring-shaped permanent magnet.
  • the coil winding 50 is driven by a three-phase, nine-winding and six-pole wiring method.
  • the coil 52 is three-phase, and the number of the coils 52 is nine, which can generate three pairs (ie six) electrodes, and the combined force of the three pairs of electrodes drives the permanent magnet 40 to rotate.
  • This wiring method can realize wide voltage operation and improve driving performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

一种无刷直流水泵，包括具有冷却腔的壳体（10）和均设置于冷却腔内的叶轮组件（30）、永磁体（40）和线圈绕组（50），永磁体（40）固定于叶轮组件（30），线圈绕组（50）固定于壳体（10），永磁体（40）与线圈绕组（50）间隔相对设置，线圈绕组（50）通电，使永磁体（40）旋转，永磁体（40）旋转带动叶轮组件（30）绕线圈绕组（50）的中心轴旋转。

Description

无刷直流水泵 技术领域
本申请涉及水泵技术领域，更具体的，涉及一种无刷直流水泵。
 背景技术
微型无刷直流水泵包括叶轮和驱动叶轮旋转的电机组件，电机组件采用线圈和磁钢驱动，采用电磁原理，给线圈通电产生交变磁场，与磁钢相互作用，使叶轮转动，从而带动流体循环。
 技术问题
现有技术中，线圈设置于水泵壳体外，磁钢设置于壳体内，线圈与磁钢之间间隔有壳体，由于壳体有厚度，不仅占用较大空间，缩小线圈的空间利用率，而且导致磁钢和线圈之间的磁隙较大，降低驱动力。
 技术解决方案
本申请的目的在于提供一种无刷直流水泵，增加线圈的空间利用率，降低磁隙，提高驱动力。
本申请的技术方案如下：
一种无刷直流水泵，包括具有冷却腔的壳体和均设置于所述冷却腔内的叶轮组件、永磁体和线圈绕组，所述永磁体固定于所述叶轮组件，所述线圈绕组固定于所述壳体，所述永磁体与所述线圈绕组间隔相对设置，所述线圈绕组通电，使所述永磁体旋转，所述永磁体旋转带动所述叶轮组件绕所述线圈绕组的中心轴旋转。
 有益效果
本申请的有益效果在于：
通过使永磁体和线圈绕组均设置于冷却腔，去除了现有技术中永磁体和线圈绕组之间的壳体，不仅增加线圈的空间利用率，而且降低永磁体和线圈绕组之间的磁隙，提高驱动力。
 附图说明
图1为本申请一具体实施例的无刷直流水泵的爆炸结构示意图。
图2为图1所示的无刷直流水泵的整体结构示意图。
图3为沿图2中A-A方向的截面结构示意图。
图4为图1中永磁体和线圈绕组的结构示意图。
图5为图2去除上壳体后的结构示意图。
图6为图2去除上壳体和叶轮组件的结构示意图。
图7为线圈采用的星形接线法的电路示意图。
图8为线圈采用的三角形接线法的电路示意图。
 本发明的实施方式
下面结合附图和实施方式对本申请作进一步说明。
参考图1-图6，本申请公开了一种无刷直流水泵，包括具有冷却腔的壳体10和均设置于冷却腔内的叶轮组件30、永磁体40和线圈绕组50，永磁体40固定于叶轮组件30，线圈绕组50通过胶合固定于壳体10，永磁体40与线圈绕组50间隔相对设置，线圈绕组50通电，使永磁体40旋转，永磁体40旋转带动叶轮组件30绕线圈绕组50的中心轴旋转。本申请将线圈绕组50也设置于冷却腔内，去除了现有技术中永磁体40和线圈绕组50之间的壳体10，不仅增加线圈52的空间利用率，而且降低永磁体40和线圈绕组50之间的磁隙，提高驱动力。可以通过增加线圈52匝数和提高永磁体40磁通量产生更强磁场，以及产生更大的驱动力，提高水泵的驱动性能。
参考图1，壳体10包括上壳体11和下壳体12，上壳体11和下壳体12之间设置有密封圈60。通过紧固件将上壳体11和下壳体12组装成一整体。
参考图1和图2，无刷直流水泵还包括设置于壳体10外的线路板70，线路板70为线圈绕组50供电，线路板70与线圈绕组50通过导线71相连接，壳体10上开设有供导线71穿过的开口13，开口13通过密封胶密封。在本具体实施例中，线路板70和导线71均设置于壳体10的凹槽内。
参考图2，壳体10上开设有冷却液进口14和冷却液出口15，冷却液进口14和冷却液出口15均与冷却腔相连通，叶轮组件30旋转带动冷却液在冷却腔内流动，实现冷却降温。冷却液进口14和冷却液出口15均对应于叶片34的位置。
参考图1-图3，在一具体实施例中，还包括旋转轴20，旋转轴20固定于壳体10，永磁体40旋转带动叶轮组件30绕旋转轴20旋转。具体的，壳体10上设置有凸出壳体10表面的用于安装旋转轴20的安装座，安装座上设有安装孔，旋转轴20固定于安装孔。
参考图1和图3，在一具体实施例中，叶轮组件30包括套设于旋转轴20的轴套31、与轴套31间隔相对设置的侧板32、连接轴套31和侧板32的轮盘33和设置于侧板32的远离旋转轴20的外侧的叶片34，轴套31、轮盘33和侧板32围成用于容纳永磁体40和线圈绕组50的容纳腔35，永磁体40固定于侧板32的靠近旋转轴20的内侧，线圈绕组50环绕旋转轴20设置，永磁体40环绕线圈绕组50设置。
参考图1-图6，在一具体实施例中，线圈绕组50包括导磁体51和缠绕在导磁体51上的线圈52，线圈52的数量为多个，线圈52环绕旋转轴20设置，线圈52的中心轴与旋转轴20垂直，永磁体40环绕线圈绕组50设置，永磁体40与线圈52相对间隔设置。
参考图4，在一具体实施例中，导磁体51包括固定于壳体10的轭部511、沿轭部511的朝与旋转轴20垂直且背离旋转轴20方向延伸的齿部512和设置于齿部512的背离轭部511的端部的端板513，线圈52缠绕于齿部512，端板513与永磁体40间隔相对设置。
在一具体实施例中，轭部511为套设于旋转轴20的环形轭部，在本具体实施例中，环形轭部511套设于旋转轴20的安装座上，并通过胶合固定在安装座上。
在一具体实施例中，端板513沿旋转轴20周向向两侧延伸，以扩大其与永磁体40正对的表面积，提高驱动力。
在一具体实施例中，永磁体40为环形永磁体40，环形永磁体40可以为由多个间断式永磁体构成的环绕线圈绕组50的环形永磁体，也可以是闭合环形永磁体。
在一具体实施例中，线圈52为三相，三相线圈52分别绕旋转轴20周向均匀分布，三相即3根导线71，3根导线71分别缠绕在线圈52上，每根导线71以串联的方式缠绕在多个沿旋转轴20周向均匀分布的线圈52上，线圈52的总个数可以为3的整数倍，线圈52通电后，产生沿线圈绕组50径向方向的合成磁力，永磁体40的磁场方向垂直于线圈绕组50合成磁力的方向，永磁体40受到转动力矩，产生旋转。
在本具体实施例中，线圈绕组50采用三相九绕组六极的接线方式实现驱动，具体的，线圈52为三相，线圈52的个数为9个，能够产生三对（即六个）电极，该三对电极的合力驱动永磁体40旋转。该种接线方式可以实现宽电压运行，提高驱动性能。
具体的，线圈52可以采用星形接线法或三角形接线法，参考图7和图8，三相导线71分别标记为W、V和U，字母后面的数字1代表电流流入方向，数字2代表电流流出方向，圆圈代表电连接。
以上所述的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。

Claims (10)

  1. 一种无刷直流水泵，其特征在于，包括具有冷却腔的壳体和均设置于所述冷却腔内叶轮组件、永磁体和线圈绕组，所述永磁体固定于所述叶轮组件，所述线圈绕组固定于所述壳体，所述永磁体与所述线圈绕组间隔相对设置，所述线圈绕组通电，使所述永磁体旋转，所述永磁体旋转带动所述叶轮组件绕所述线圈绕组的中心轴旋转。
  2. 根据权利要求1所述的无刷直流水泵，其特征在于，所述永磁体为环形永磁体，所述环形永磁体环绕所述线圈绕组设置。
  3. 根据权利要求2所述的无刷直流水泵，其特征在于，还包括旋转轴，所述旋转轴固定于所述壳体，所述永磁体旋转带动所述叶轮组件绕所述旋转轴旋转，所述线圈绕组包括导磁体和缠绕在所述导磁体上的线圈，所述线圈的数量为多个，所述线圈环绕所述旋转轴设置，所述线圈的中心轴与所述旋转轴垂直，所述永磁体与所述线圈间隔相对设置。
  4. 根据权利要求3所述的无刷直流水泵，其特征在于，所述导磁体包括固定于所述壳体的轭部、沿所述轭部的朝与所述旋转轴垂直且背离所述旋转轴方向延伸的齿部和设置于所述齿部的背离所述轭部的端部的端板，所述线圈缠绕于所述齿部，所述端板与所述永磁体间隔相对设置。
  5. 根据权利要求4所述的无刷直流水泵，其特征在于，所述轭部为套设于所述旋转轴的环形轭部。
  6. 根据权利要求4所述的无刷直流水泵，其特征在于，所述端板沿所述旋转轴周向向两侧延伸。
  7. 根据权利要求3所述的无刷直流水泵，其特征在于，所述线圈绕组为三相，所述线圈的个数为9个，所述线圈绕组采用星形接线法或三角形接线法。
  8. 根据权利要求3所述的无刷直流水泵，其特征在于，所述叶轮组件包括套设于所述旋转轴的轴套、与所述轴套间隔相对设置的侧板、连接所述轴套和所述侧板的轮盘和设置于所述侧板的远离所述旋转轴的外侧的叶片，所述轴套、所述轮盘和所述侧板围成用于容纳所述永磁体和所述线圈绕组的容纳腔，所述永磁体固定于所述侧板的靠近所述旋转轴的内侧。
  9. 根据权利要求1所述的无刷直流水泵，其特征在于，还包括设置于所述壳体外的线路板，所述线路板与所述线圈绕组通过导线相连接，所述壳体上开设有供所述导线穿过的开口，所述开口通过密封胶密封。
  10. 根据权利要求1所述的无刷直流水泵，其特征在于，所述壳体上开设有冷却液进口和冷却液出口，所述冷却液进口和所述冷却液出口均与所述冷却腔相连通。
PCT/CN2020/139239 2020-11-27 2020-12-25 无刷直流水泵 Ceased WO2022110436A1 (zh)

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