WO2005124157A1 - A centrifugal discharge pump - Google Patents

A centrifugal discharge pump Download PDF

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Publication number
WO2005124157A1
WO2005124157A1 PCT/CN2004/001355 CN2004001355W WO2005124157A1 WO 2005124157 A1 WO2005124157 A1 WO 2005124157A1 CN 2004001355 W CN2004001355 W CN 2004001355W WO 2005124157 A1 WO2005124157 A1 WO 2005124157A1
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WO
WIPO (PCT)
Prior art keywords
rotor
blade
shaft
cavity
impeller
Prior art date
Application number
PCT/CN2004/001355
Other languages
French (fr)
Chinese (zh)
Inventor
Huashan Shi
Original Assignee
Jiangmen Hanyu Electrical 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 Jiangmen Hanyu Electrical Co., Ltd. filed Critical Jiangmen Hanyu Electrical Co., Ltd.
Publication of WO2005124157A1 publication Critical patent/WO2005124157A1/en

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Classifications

    • 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
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/118—Structural association with clutches, brakes, gears, pulleys or mechanical starters with starting devices
    • 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
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • 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
    • F04D13/0606—Canned motor pumps
    • F04D13/064—Details of the magnetic circuit

Definitions

  • the utility model relates to a centrifugal drainage pump, in particular to a centrifugal drainage pump for a washing machine or a dishwasher.
  • the purpose of the utility model is to provide a novel centrifugal drainage pump capable of reducing the starting resistance of a motor rotor.
  • the centrifugal drainage pump of the utility model comprises a pump body, a pump cover, a permanent magnet rotor, a rotating shaft, and an air blade.
  • the permanent magnet rotor is disposed in the pump body, and the air blade is installed in an air blade cavity formed by the pump cover.
  • the body extends to the cavity of the wind blade, the permanent magnet rotor is fixedly connected to the lower part of the rotating shaft, the shaft head is fixedly connected to the shaft sleeve, and a spiral transmission structure is arranged between the shaft sleeve and the wind blade.
  • the purpose of reducing the starting resistance of the rotor of the utility model is achieved by the rotor, the rotating shaft and the impeller not starting at the same time.
  • the rotating shaft and the rotor are fixedly connected, and the front end of the rotating shaft is fixedly connected with a shaft sleeve.
  • a matching thread structure is provided on the outer wall of the shaft sleeve and the inner cavity of the blade.
  • the rotation of the blades is slightly later than the start of the rotor and the rotating shaft.
  • the lagging time of the wind blade depends on the length of the thread.
  • the rotor drives the rotating shaft to rotate a large angle.
  • the increase of the rotation angle is conducive to the motor rotor starting at zero resistance and accelerating to a higher speed before pushing the blades to rotate together. Therefore, the utility model can minimize the starting resistance of the motor, reduce the starting load, and reduce the output power of the motor.
  • FIG. 1 is a schematic structural diagram of the present invention.
  • FIG. 2 is an exploded view of a single-threaded structure of a wind blade of the present invention.
  • FIG. 3 is an exploded view of the wind blade of the utility model using a double-threaded structure.
  • Fig. 4 is a schematic diagram of the installation of the single-threaded air blade.
  • Fig. 5 is a schematic diagram of the installation of a double-threaded air blade.
  • 1 is the blade cavity
  • 2 is the blade
  • 3 is the pump cover
  • 4 is the shaft sleeve
  • 5 is the sealing rubber ring
  • 6 is the pump body
  • 7 is the gasket
  • 8 is Plastic bearing cover
  • 9 is a rubber bearing cover
  • 10 is a bearing
  • 1 is a permanent magnet rotor
  • 12 is a permanent magnet cavity
  • 13 is a rotating shaft
  • 14 is a bearing seat
  • 17 is a blade rotor
  • 18 is a blade cavity .
  • a waterproof and sealed permanent magnet cavity 12 is formed by mutually matching plastic bearing covers 8, rubber bearing covers 9 and bearings 10.
  • the pump cover 3 encloses a blade cavity 1.
  • the rotating shaft 13 extends through the plastic bearing cover 8, the rubber bearing cover 9 and the bearing 10 from the permanent magnet cavity 12 into the wind blade cavity 1.
  • the permanent magnet rotor 11, the shaft 13, the shaft sleeve 4, the bearing 10, the rubber bearing cover 9, the plastic bearing cover 8, the blade 2 and the blade cavity 18 are coaxially mounted.
  • the permanent magnet rotor 1 1 is located in the permanent magnet cavity 12 Inside, it is fixedly connected to the lower part of the rotating shaft 13.
  • the wind blade 2 is located in the wind blade cavity 1, and the wind blade 2 is fixed on the wind blade rotor 17, and an inner cavity 18 of the wind blade is opened inside the wind blade rotor 17, and is covered outside the shaft sleeve 4.
  • the head of the shaft 13 is fixedly connected to the shaft sleeve 4.
  • the shaft sleeve 4 and the wind blade 2 cooperate with each other as a helical transmission structure, that is, a section of threads that cooperate with each other is provided between the outer wall of the shaft sleeve 4 and the cavity wall of the corresponding air cavity 18 .
  • the cavity wall of the blade inner cavity 18 is provided with a concave thread; conversely, if the outer wall of the shaft sleeve 4 is provided with a concave thread, the cavity of the fan blade inner cavity 18
  • the walls are raised threads.
  • the shaft sleeve 4 spirally rotates a certain angle in the inner cavity 18 of the blade, in this embodiment, it is 45 degrees or more.
  • the threaded end of the outer wall of the sleeve 4 reaches the threaded end of the inner cavity 18 of the blade.
  • the inner cavity of the blades rotates, but instead drives the blades to rotate together.
  • the thread shapes of the shaft sleeve 4 and the blade cavity may be trapezoidal, rectangular, triangular, zigzag, and circular, and may be single threads as shown in FIG. 2 and FIG. 4 or as shown in FIG. 3 and FIG. 5. Double-threaded construction shown.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

A centrifugal discharge pump includes a pump body, a pump cover, permanent magnetic rotor, a rotating shaft and an impeller. The permanent magnetic rotor is disposed in magnetic chamber and the impeller is arranged in an impeller chamber formed with the pump cover. The rotating shaft extends from the pump body to the impeller chamber. The permanent magnetic rotor is fixed to the lower end of the rotating shaft and a shaft sleeve is fiE5d to its top end. There is a screw transmission structure between the impeller and the shaft sleeve. The rotation of the impeller is slightly later than startup of the rotor and the rotating shaft. This situation benefits the permanent magnetic rotor start-up with zero resistance, and then the rotor forces the impeller to rotate with it together when the rotor is accelerated to a high speed. Therefore, the invention can reduce the resistance to startup of the motor to a lowest level and decrease the load of startup and output power of the motor.

Description

一种离心式排水泵  Centrifugal drainage pump
技术领域 Technical field
本实用新型涉及一种离心式排水泵，尤其涉及一种洗衣机或洗碗机用 离心式排水泵。  The utility model relates to a centrifugal drainage pump, in particular to a centrifugal drainage pump for a washing machine or a dishwasher.
背景技术 Background technique
现有的安装于洗衣机或洗碗机上的离心式排水泵， 往往采用异步电 机， 启动时转速低、 力矩大， 可以解决启动力矩的问题， 但是异步电机成 本高、 效率低。 如果采用永磁同步电机， 由于其启动力矩很小、 需要很大 的启动功率， 如果启动功率小， 启动力矩不足以克服负荷时， 容易造成电 机堵转。  Existing centrifugal drainage pumps installed on washing machines or dishwashers often use asynchronous motors, which have low speed and large torque during startup, which can solve the problem of starting torque, but asynchronous motors have high costs and low efficiency. If a permanent magnet synchronous motor is used, because its starting torque is small and a large starting power is required, if the starting power is small and the starting torque is not enough to overcome the load, it is easy to cause the motor to stall.
发明目的 Object of the invention
本实用新型的目的在于提供一种新型的降低电机转子启动阻力的离 心式排水泵。  The purpose of the utility model is to provide a novel centrifugal drainage pump capable of reducing the starting resistance of a motor rotor.
本发明采用的技术方案 Technical solution adopted by the present invention
本实用新型的离心式排水泵， 包括泵体、 泵盖、 永磁转子、 转轴、 风 叶， 永磁转子安置于泵体内， 风叶安设于泵盖形成的风叶腔体内， 转轴从 泵体内延伸至风叶腔体，转轴下部固定连接永磁转子，转轴头部固定连接 轴套， 轴套与风叶间设有螺旋传动结构。  The centrifugal drainage pump of the utility model comprises a pump body, a pump cover, a permanent magnet rotor, a rotating shaft, and an air blade. The permanent magnet rotor is disposed in the pump body, and the air blade is installed in an air blade cavity formed by the pump cover. The body extends to the cavity of the wind blade, the permanent magnet rotor is fixedly connected to the lower part of the rotating shaft, the shaft head is fixedly connected to the shaft sleeve, and a spiral transmission structure is arranged between the shaft sleeve and the wind blade.
本实用新型的降低转子启动阻力的目的， 是通过转子、转轴和叶轮不 同时启动而实现的。转轴与转子是固定连接的， 且转轴前端固定连接一轴 套，轴套外壁与风叶内腔开设有一段相配合的螺纹结构。当转子带动转轴 转动后， 轴套跟随转轴转动， 旋转一定角度后， 轴套的螺纹一端与风叶内 腔的螺纹终端碰合， 从而带动风叶一起转动。 因此， 风叶的转动'略迟于转 子及转轴的启动。风叶滞后启动的时间取决于螺紋的长度，螺纹长度增加， 则风叶与轴套的相对转动距离增加，转子带动转轴转动较大角度、较长时 间后才会带动风叶转动。转动角度增加，有利于电机转子在零阻力启动并 加速到达较高速度后再推动风叶一起转动。因此，本实用新型能将电机启 动的阻力降到最低， 减小了启动负荷， 降低了电机的输出功率。 The purpose of reducing the starting resistance of the rotor of the utility model is achieved by the rotor, the rotating shaft and the impeller not starting at the same time. The rotating shaft and the rotor are fixedly connected, and the front end of the rotating shaft is fixedly connected with a shaft sleeve. A matching thread structure is provided on the outer wall of the shaft sleeve and the inner cavity of the blade. After the rotor drives the shaft to rotate, the shaft sleeve rotates with the shaft. After a certain angle of rotation, the threaded end of the shaft sleeve and the inside of the blade The threaded ends of the cavity meet, which drives the blades to rotate together. Therefore, the rotation of the blades is slightly later than the start of the rotor and the rotating shaft. The lagging time of the wind blade depends on the length of the thread. When the thread length increases, the relative rotation distance between the wind blade and the shaft sleeve increases. The rotor drives the rotating shaft to rotate a large angle. The increase of the rotation angle is conducive to the motor rotor starting at zero resistance and accelerating to a higher speed before pushing the blades to rotate together. Therefore, the utility model can minimize the starting resistance of the motor, reduce the starting load, and reduce the output power of the motor.
附图说明 BRIEF DESCRIPTION OF THE DRAWINGS
图 1是本实用新型结构示意图。  FIG. 1 is a schematic structural diagram of the present invention.
图 2是本实用新型的风叶采用单螺纹结构的爆炸图。  FIG. 2 is an exploded view of a single-threaded structure of a wind blade of the present invention.
图 3是本实用新型的风叶采用双螺纹结构的爆炸图。  FIG. 3 is an exploded view of the wind blade of the utility model using a double-threaded structure.
图 4是单螺紋结构的风叶的安装示意图。  Fig. 4 is a schematic diagram of the installation of the single-threaded air blade.
图 5是双螺紋结构的风叶的安装示意图。  Fig. 5 is a schematic diagram of the installation of a double-threaded air blade.
实施例 Examples
-如图 1至图 5所示， 1是风叶腔体， 2是风叶， 3是泵盖， 4是轴套， 5是密封橡胶圈， 6是泵体， 7是垫片， 8是塑料轴承盖， 9是橡胶轴承盖， 10是轴承， 1 1是永磁转子， 12是永磁腔体， 13是转轴， 14是轴承座， 17是风叶转筒， 18是风叶腔体。  -As shown in Figures 1 to 5, 1 is the blade cavity, 2 is the blade, 3 is the pump cover, 4 is the shaft sleeve, 5 is the sealing rubber ring, 6 is the pump body, 7 is the gasket, and 8 is Plastic bearing cover, 9 is a rubber bearing cover, 10 is a bearing, 1 is a permanent magnet rotor, 12 is a permanent magnet cavity, 13 is a rotating shaft, 14 is a bearing seat, 17 is a blade rotor, and 18 is a blade cavity .
如图 1所示的泵体 6， 通过相互配合的塑料轴承盖 8、 橡胶轴承盖 9 和轴承 10形成防水密封的永磁腔体 12。 泵盖 3围成风叶腔体 1。 转轴 13 穿过塑料轴承盖 8、橡胶轴承盖 9和轴承 10从永磁腔体 12延伸至风叶腔 体 1 中。 永磁转子 11、 轴 13、 轴套 4、 轴承 10、 橡胶轴承盖 9、 塑料轴 承盖 8、风叶 2和风叶内腔 18为同轴安装。永磁转子 1 1位于永磁腔体 12 内， 固定连接于转轴 13下部。 As shown in the pump body 6 in FIG. 1, a waterproof and sealed permanent magnet cavity 12 is formed by mutually matching plastic bearing covers 8, rubber bearing covers 9 and bearings 10. The pump cover 3 encloses a blade cavity 1. The rotating shaft 13 extends through the plastic bearing cover 8, the rubber bearing cover 9 and the bearing 10 from the permanent magnet cavity 12 into the wind blade cavity 1. The permanent magnet rotor 11, the shaft 13, the shaft sleeve 4, the bearing 10, the rubber bearing cover 9, the plastic bearing cover 8, the blade 2 and the blade cavity 18 are coaxially mounted. The permanent magnet rotor 1 1 is located in the permanent magnet cavity 12 Inside, it is fixedly connected to the lower part of the rotating shaft 13.
风叶 2处于风叶腔体 1中， 风叶 2固定于风叶转筒 17上， 风叶转筒 17内部开设风叶内腔 18， 并罩于轴套 4外。转轴 13头部与轴套 4固定连 接。如图 2至图 5所示， 轴套 4与风叶 2之间配合为螺旋传动结构， 即轴 套 4外壁与相对应的风叶内腔 18的腔壁间开设有一段的互相配合的螺紋。 若轴套 4外壁设有凸起的螺纹， 则风叶内腔 18的腔壁设有内凹的螺紋； 反之， 若轴套 4外壁设有内凹的螺纹， 则风叶内腔 18的腔壁为凸起的螺 纹。 当轴套 4在风叶内腔 18 内螺旋转动一定角度， 在本实施例中为 45 度以上， 轴套 4外壁的螺纹一端到达风叶内腔 18的螺紋终端， 轴套 4不 再相对于风叶内腔转动， 而是带动风叶一体转动。 其作用为： 当电机（永 磁转子 U ) 在顺时针或逆时针任何一个方向启动时， 会在零阻力方向启 动、 加速， 转动一定的角度后才与风叶内腔 18内螺纹终端相碰合， 从而 带动风叶 2转动、 达到排出风叶腔体 1中的液体的目的。  The wind blade 2 is located in the wind blade cavity 1, and the wind blade 2 is fixed on the wind blade rotor 17, and an inner cavity 18 of the wind blade is opened inside the wind blade rotor 17, and is covered outside the shaft sleeve 4. The head of the shaft 13 is fixedly connected to the shaft sleeve 4. As shown in FIG. 2 to FIG. 5, the shaft sleeve 4 and the wind blade 2 cooperate with each other as a helical transmission structure, that is, a section of threads that cooperate with each other is provided between the outer wall of the shaft sleeve 4 and the cavity wall of the corresponding air cavity 18 . If the outer wall of the shaft sleeve 4 is provided with a convex thread, the cavity wall of the blade inner cavity 18 is provided with a concave thread; conversely, if the outer wall of the shaft sleeve 4 is provided with a concave thread, the cavity of the fan blade inner cavity 18 The walls are raised threads. When the shaft sleeve 4 spirally rotates a certain angle in the inner cavity 18 of the blade, in this embodiment, it is 45 degrees or more. The threaded end of the outer wall of the sleeve 4 reaches the threaded end of the inner cavity 18 of the blade. The inner cavity of the blades rotates, but instead drives the blades to rotate together. Its function is: When the motor (permanent magnet rotor U) is started in either clockwise or counterclockwise direction, it will start and accelerate in the direction of zero resistance, and it will only touch the internal thread terminal of the inner cavity 18 of the blade after turning a certain angle. Closed, so as to drive the blade 2 to rotate and achieve the purpose of discharging the liquid in the blade cavity 1.
本实施例中轴套 4与风叶腔体的螺紋形状可以是梯形、矩形、三角形、 锯齿形和圆形， 可以是如 2、 图 4所示的单螺纹也可以是如图 3、 图 5所 示的双螺纹结构。  In this embodiment, the thread shapes of the shaft sleeve 4 and the blade cavity may be trapezoidal, rectangular, triangular, zigzag, and circular, and may be single threads as shown in FIG. 2 and FIG. 4 or as shown in FIG. 3 and FIG. 5. Double-threaded construction shown.

Claims

权 利 要 求 Rights request
、 一种离心式排水泵， 包括泵体（6)、 泵盖 （3)、 永磁转子 （11)、 转 轴 （13)、 风叶 （2)， 永磁转子 （11) 安置于泵体 （6)， 风叶 （2) 安设于泵盖 （3) 围成的风叶腔体 （1)， 转轴 （13) 从泵体 （6) 延 伸至风叶腔体 （1)， 其特征在于转轴 （13) 下部固定连接永磁转子A centrifugal drainage pump includes a pump body (6), a pump cover (3), a permanent magnet rotor (11), a rotating shaft (13), an air blade (2), and a permanent magnet rotor (11) disposed on the pump body ( 6), the blade (2) is installed in the blade cavity (1) surrounded by the pump cover (3), and the rotating shaft (13) extends from the pump body (6) to the blade cavity (1), which is characterized by Rotor shaft (13) The permanent magnet is fixedly connected to the lower part
(11)， 转轴 (13) 头部固定连接轴套 （4)， 轴套 （4) 与风叶 (2) 间设有螺旋传动结构。 (11), the shaft (13) is fixedly connected with the shaft sleeve (4) at the head, and a screw transmission structure is arranged between the shaft sleeve (4) and the wind blade (2).
、 根据权利要求 1所述的离心式排水泵， 其特征在于所述泵体（6)通 过相配合的塑料轴承盖（8)、 橡胶轴承盖（9)和轴承（10)密封形 成防水密封永磁腔体 （12)， 转子 （11) 安置于永磁腔体 （12) 内。 、 根据权利要求 1所述的离心式排水泵， 其特征在于所述风叶（2)固 定连接风叶转筒 （17)， 风叶转筒内开设风叶内腔 （18)， 罩于轴套7. The centrifugal drainage pump according to claim 1, characterized in that the pump body (6) is sealed to form a water-proof seal by means of matching plastic bearing covers (8), rubber bearing covers (9) and bearings (10). The magnetic cavity (12) and the rotor (11) are arranged in the permanent magnet cavity (12). The centrifugal drainage pump according to claim 1, characterized in that the wind blade (2) is fixedly connected to the wind blade rotor (17), and an inner cavity (18) of the wind blade is provided in the wind blade rotor, and the shaft is covered on the shaft set
(4) 外， 风叶内腔壁和轴套 （4) 外壁开设有一段相配合的螺纹， 形成所述的螺旋传动结构。 (4) The inner wall of the blade and the shaft sleeve (4) The outer wall is provided with a matching thread to form the spiral transmission structure.
、 根据权利要求 3所述的离心式排水泵， 其特征在于所述螺紋为单螺 纹或双螺纹结构或多螺纹结构。 The centrifugal drainage pump according to claim 3, wherein the thread is a single thread or a double thread structure or a multi-thread structure.
、 根据权利要求 3或 4所述的离心式排水泵， 其特征在于所述螺纹截 面形状为梯形、 矩形、 三角形、 锯齿形或半圆形。 The centrifugal drainage pump according to claim 3 or 4, characterized in that the cross-sectional shape of the thread is trapezoidal, rectangular, triangular, zigzag or semicircular.
PCT/CN2004/001355 2004-06-16 2004-11-26 A centrifugal discharge pump WO2005124157A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200420047013.6 2004-06-16
CN 200420047013 CN2705636Y (en) 2004-06-16 2004-06-16 Centrifugal water discharge pump

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CN101102068B (en) * 2007-08-08 2010-12-29 江门市汉宇电器有限公司 Permanent magnetic synchronization motor for water discharge pump
EP3032722B1 (en) 2014-12-11 2020-02-19 Johnson Electric International AG Rotor, motor, pump and cleaning apparatus
CN105697389A (en) * 2014-12-11 2016-06-22 德昌电机(深圳)有限公司 Pump and cleaning device
CN108400664A (en) * 2018-05-15 2018-08-14 佛山市朗特电机有限公司 A kind of permanent-magnet motor rotor assembly

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DE102006027319B4 (en) * 2006-06-13 2014-05-22 Wilo Ag Centrifugal motor pump with rotation-directed start
CN111692357B (en) * 2020-06-22 2022-05-27 中际通达水处理装备研究院(江苏)有限公司 Electromagnetic type reduces changeable environmental protection load controlling means of friction

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