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WO2024088034A1 - 球形泵与电机组合体 - Google Patents

球形泵与电机组合体 Download PDF

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Publication number
WO2024088034A1
WO2024088034A1 PCT/CN2023/123380 CN2023123380W WO2024088034A1 WO 2024088034 A1 WO2024088034 A1 WO 2024088034A1 CN 2023123380 W CN2023123380 W CN 2023123380W WO 2024088034 A1 WO2024088034 A1 WO 2024088034A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
motor
rotor
spherical pump
spherical
Prior art date
Application number
PCT/CN2023/123380
Other languages
English (en)
French (fr)
Inventor
陈小平
王陆一
谈耀文
Original Assignee
深圳市球形动力科技有限公司
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 深圳市球形动力科技有限公司 filed Critical 深圳市球形动力科技有限公司
Publication of WO2024088034A1 publication Critical patent/WO2024088034A1/zh

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/18—Combined units comprising both motor and pump
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2788—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets

Definitions

  • This patent relates to a liquid pump, in particular to a combination of a spherical pump and a motor.
  • the spherical pump technology is a new variable capacity power mechanism invented in recent years. It has a number of Chinese patents. Its advantages are that the number of pump parts is small, the seal is reliable, there is no inlet and outlet valve, it is easy to design ultra-miniaturized, it can achieve high-speed operation, and it has low noise. At present, various applications of spherical pumps are being continuously developed.
  • the Chinese patent with the patent number "ZL202220285836.0" and the patent name "micro spherical pump” has the most significant features of small size and light weight. It can be used in occasions such as dental irrigators, electric toothbrushes with rinsing functions, and portable fire fighting equipment that have strict restrictions on the volume of pumps.
  • the volume of spherical pumps is greatly reduced.
  • the spherical pump is a new type of water pump, there is currently no motor that matches its volume.
  • the spherical pump is small in size, but the motor that matches it is large in size, so the advantage of the small size of the spherical pump cannot be fully utilized, and it cannot meet the overall miniaturization requirements of portable equipment for pumps and motors.
  • the purpose of this patent is to design a spherical pump and motor combination, using the latest invented and applied spherical pump technology, and integrating it with the motor it uses, so as to minimize the volume of the spherical pump and motor after combination.
  • a spherical pump and motor combination including a spherical pump and an outer rotor motor
  • the turntable shaft of the spherical pump uses the central hole of the cylinder seat at the bottom of the spherical pump as a rotation support
  • the outer rotor of the motor of the outer rotor motor has a barrel-shaped outer rotor body with an opening upward, a magnetic ring is arranged on the inner circumference of the outer rotor body, and a rotor center axis is arranged at the center of the barrel bottom surface of the outer rotor body;
  • the outer periphery of the stator bracket with a central axis hole on the motor stator is provided with a plurality of groups of coils and coil windings composed of magnetic steel, the central axis of the rotor is installed in the central axis hole of the stator bracket to form a rotating pair, the stator bracket and the coil winding are placed in the annular
  • the connecting portion is a cylindrical groove with an opening facing upward, the outer circumference of the cylinder seat is matched with the inner circumference of the connecting portion groove, and the cylinder seat is placed in the connecting portion groove to form an interference fit, thereby fixing the spherical pump and the stator bracket of the outer rotor motor;
  • a sleeve is provided at the matching portion between the central axis hole of the stator bracket and the central axis of the rotor as a rotation support for the central axis of the rotor;
  • the sleeve is divided into two sections, the upper and lower sections, the inner diameter of the sleeve is smaller than the diameter of the central axis hole of the stator bracket, and the sleeve is pre-embedded in the central axis hole of the stator bracket; the sleeve is made of copper or other wear-resistant materials;
  • a semicircular shaft head is provided at the lower end of the turntable shaft, and a semicircular shaft head matching the semicircular shaft head of the turntable shaft is provided on the upper end surface of the rotor central shaft, and the lower end of the turntable shaft and the upper end of the rotor central shaft are meshed with each other through the semicircular shaft head to form a rotational connection;
  • a cylindrical sleeve is provided on the outer circumference of the meshing portion between the turntable shaft and the rotor central shaft, and the sleeve is fixedly covered on the upper circumference of the semicircular shaft of the turntable shaft or fixedly covered on the lower circumference of the semicircular shaft of the rotor central shaft;
  • the lower end of the turntable shaft and the upper end of the rotor center shaft are round shaft heads, and a sleeve is arranged on the outer periphery of the meshing portion of the lower end of the turntable shaft and the upper end of the rotor center shaft.
  • the sleeve is respectively clamped on the round shaft heads of the lower end of the turntable shaft and the upper end of the rotor center shaft in an interference fit manner, so that the lower end of the turntable shaft and the rotor center shaft are connected by the sleeve.
  • the upper end of the shaft is connected to form a rotational fit;
  • the spherical pump comprises a cylinder body and a cylinder head, the cylinder body and the cylinder head are fixedly connected to form a spherical inner cavity, and the cylinder body and the cylinder head are fixedly connected by any one of ultrasonic welding, screw connection, adhesive bonding, or clamp connection; wherein the material of the clamp in the clamp connection is metal or heat shrinkable plastic;
  • the outer rotor motor further comprises a motor protection shell, the upper opening portion of the motor protection shell is sealed and fixedly connected to the outer circumference of the connecting portion;
  • the motor protection shell is a cylindrical barrel body with an opening facing upward, and a protection shell positioning ring is arranged between the inner circumference of the opening of the cylindrical barrel body and the outer circumference of the connecting part, and the protection shell positioning ring forms a sealed and fixed connection with the inner circumference of the motor protection shell and the outer circumference of the connecting part respectively; the upper end shape of the protection shell positioning ring is adapted to the lower end shape of the spherical pump cylinder body.
  • the spherical pump is matched with the outer rotor motor.
  • the outer rotor motor is small in size. Its stator bracket protrudes from the motor to form a connection part.
  • An embedded structure is arranged at the connection part, which reduces the axial dimension of the connection between the spherical pump and the motor.
  • the pump power unit formed by the combination of the spherical pump and the outer rotor motor is small in size and compact in structure. It is suitable for various occasions with strict requirements on volume, and gives full play to the advantage of the small size of the spherical pump;
  • Figure 1 Schematic diagram of the appearance and structure of the spherical pump and motor combination described in this patent;
  • Figure 2 AA section view in Figure 1;
  • Figure 3 D-D cross-sectional view in Figure 2;
  • Figure 4 Schematic diagram of the three-dimensional structure of the ball pump shoe seat
  • Figure 5 Schematic diagram of the three-dimensional structure of the spherical pump cylinder cover
  • Figure 6 Schematic diagram of the three-dimensional structure of the spherical pump cylinder
  • Figure 7 Schematic diagram of the structure where the cylinder block and the cylinder head are fixedly connected by a clamp
  • Figure 8 Schematic diagram of the three-dimensional structure of the clamp
  • Figure 9 Schematic diagram of the three-dimensional structure of the spherical pump piston
  • Figure 10 Schematic diagram of the three-dimensional structure of the spherical pump turntable
  • the ball pump and motor combination described in this patent can be used as a power unit for a tooth washer.
  • the turntable shaft 151 of the ball pump 1 is used as the power input shaft of the ball pump 1.
  • the center hole of the lower cylinder seat 121 serves as a rotation support.
  • the cylinder seat 121 is a protruding cylinder at the lower end of the cylinder 12 of the spherical pump 1. It is both a rotation support for the turntable shaft 151 and a connecting piece between the spherical pump 1 and the outer rotor motor 2.
  • the outer rotor motor 2 in this patent is designed based on the volume requirements of the spherical pump 1 for the motor, and is structurally adapted to the spherical pump 1 while meeting its electrical performance.
  • the outer rotor motor 2 includes a motor outer rotor 23, a motor stator 24, and a motor protective shell 21.
  • the motor outer rotor 23 of the outer rotor motor 2 has a cylindrical outer rotor body 231 with an opening facing upward, and a magnetic ring 233 composed of multiple groups of magnets is fixed on the inner circumference of the outer rotor body 231.
  • a rotor center axis 232 is fixedly arranged at the center of the bottom surface of the cylinder of the outer rotor body 231.
  • the motor stator 24 includes a stator bracket 242 and multiple coil windings 241 composed of multiple groups of coils and magnetic steel arranged on the outer circumference of the stator bracket 242. In this patent, there are 9 groups of coil windings 241, which are evenly distributed on the outer circumference of the stator bracket 242, thereby forming the motor stator 24.
  • a central axis hole is provided in the center of the stator bracket 242, which passes through from top to bottom. The rotor central axis 232 is inserted into the central axis hole of the stator bracket 242 from the lower end.
  • the stator bracket 242 and the coil winding 241 are placed in the annular space between the rotor central axis 232 and the magnetic ring 233 of the outer rotor.
  • the outer diameter of the rotor central axis 232 is adapted to the diameter of the central axis hole of the stator bracket 242, and a rotating pair is formed in the central axis hole of the stator bracket 242.
  • the upper end of the stator bracket 242 protrudes from the upper end of the coil winding 241 to form a connecting portion 243;
  • the connecting portion 243 is a cylindrical groove that opens upward and is used to connect the spherical pump 1.
  • the outer circumference of the cylinder seat 121 of the spherical pump 1 is matched with the inner circumference of the groove of the connecting portion 243.
  • the cylinder seat 121 is placed in the groove of the connecting portion 243 to form an interference fit, thereby fixing the spherical pump 1 and the stator bracket 241 of the outer rotor motor 2.
  • the connecting portion 243 can be fixedly connected to the upper end of the stator bracket 242 as an independent part, or it can be designed as a whole with the stator bracket 242 as an upward extension of the stator bracket 242; after the cylinder seat 121 is fixedly connected to the connecting portion 243, the turntable shaft 151 is coaxial with the rotor center axis 232, and the lower end surface of the turntable shaft 151 is aligned with the rotor.
  • the upper end surfaces of the central shaft 232 mesh with each other to transmit torque, so that the outer rotor motor 2 drives the spherical pump 1 to operate.
  • a semicircular shaft head is provided at the lower end of the turntable shaft 151, and a semicircular shaft head matching the semicircular shaft head of the turntable shaft 151 is provided at the upper end of the rotor center shaft 232.
  • the turntable shaft 151 and the rotor center shaft 232 are meshed through the flat shaft part of the semicircular shaft head to form a rotating connection to transmit torque.
  • a cylindrical sleeve 3 is further provided on the outer circumference of the meshing portion of the turntable shaft 151 and the rotor center shaft 232.
  • the sleeve 3 is fixedly covered on the upper circumference of the semicircular shaft of the turntable shaft 151 or fixedly covered on the lower circumference of the semicircular shaft head of the outer rotor center shaft.
  • the lower end of the turntable shaft 151 and the upper end of the rotor center shaft 232 can also be connected to the circular shaft heads at both ends by interference fit using the sleeve 3 to achieve rotation.
  • the connection method the lower end of the turntable shaft 151 and the upper end of the rotor center shaft 232 do not need to be made into a semicircular shaft head, and the connection method is simple and easy to operate.
  • a sleeve 25 is provided at the matching part between the central axis hole of the stator bracket 242 and the rotor central axis 232 as a rotation support for the rotor central axis 232;
  • the sleeve 25 is made of copper or other wear-resistant materials;
  • the sleeve 25 is arranged in two sections, the inner hole diameter of the sleeve 25 is slightly smaller than the diameter of the central axis hole of the stator bracket 242, and the sleeve 25 can be pre-embedded in the central axis hole of the stator bracket 242.
  • the outer rotor motor 2 also includes a motor protection shell 21, and the upper end opening portion of the motor protection shell 21 is sealed and fixedly connected to the outer circumference of the connecting portion 243; further, the motor protection shell 21 is a cylindrical barrel body with an opening upward, and the cylindrical barrel is similar to a bucket.
  • a protection shell positioning ring 22 is provided between the inner circumference of the opening of the cylindrical barrel body and the outer circumference of the connecting portion 243 to protect the motor.
  • the housing positioning ring 22 is sealed and fixedly connected with the inner circumference of the motor protection housing 21 and the outer circumference of the connecting portion 243 respectively; in actual production, the housing positioning ring 22 is pressed between the inner circumference of the upper opening of the motor protection housing 21 and the outer circumference of the connecting portion 243 by interference fit.
  • the upper end shape of the housing positioning ring 22 is adapted to the arc shape of the lower end of the cylinder body 12 of the spherical pump 1.
  • the spherical pump 1 in the present invention adopts a miniature spherical pump, as shown in FIGS. 2, 4 to 10, the spherical pump 1 comprises a cylinder head 11, a cylinder body 12, a turntable 15, a piston 17 and a sliding shoe seat 18, the cylinder body 12 and the cylinder head 11 have a hemispherical inner cavity, and the cylinder body 12 and the cylinder head 11 are fixedly connected to form a spherical inner cavity; a sliding shoe seat hole 113, a water inlet groove 114 and a water outlet groove 115 are arranged on the hemispherical inner cavity of the cylinder head 11, and a water inlet port is arranged on the outer wall of the upper end of the cylinder head 11 111 and water outlet port 112, the water inlet port 111 is connected to the water inlet groove 114, and the water outlet port 112 is connected to the water outlet groove 115; the water inlet port 111 and the water outlet port 112 are respectively used to connect the water
  • a cylinder seat 121 is fixedly connected to the lower end of the cylinder body 12.
  • the cylinder seat 121 is connected to the cylinder body 12 as a whole.
  • a center hole is provided in the cylinder seat 121, which is connected to the outside of the cylinder from the spherical surface of the hemispherical inner cavity of the cylinder body.
  • the center hole serves as a rotation support for the turntable shaft 151.
  • the angle between the axis of the center hole and the end face of the hemispherical inner cavity of the cylinder body 12 is ⁇ , and the size range of ⁇ is 5 to 20 degrees. In this embodiment, ⁇ is preferably selected as 15 degrees.
  • Positioning structures and connecting flanges are provided on the end faces of the hemispherical inner cavities of the cylinder body 12 and the cylinder head 11.
  • a protruding positioning ring is provided on the end face of the cylinder head 11, and a matching positioning groove is provided on the end face of the cylinder body 12.
  • An "O" ring 16 is provided at the connection between the end faces of the cylinder body 112 and the cylinder head 111.
  • the cylinder body 12 and the cylinder head 11 can be fixedly connected by screws, or fixedly connected by ultrasonic welding after being positioned by a positioning structure, or fixedly connected by direct bonding with glue. In FIG. 1 and FIG. 2 , the cylinder body 12 and the cylinder head 11 can be fixedly connected by ultrasonic welding or bonding with glue.
  • the cylinder body 12 and the cylinder head 11 can also be connected by fixing with a clamp 19.
  • a clamp 19 As shown in Figures 7 and 8, the structure of the cylinder body 12 and the cylinder head 11 is the same as that described above, except that a clamp 19 is added.
  • the clamp 19 is cylindrical before installation, and the inner circumference diameter of the cylinder is adapted to the outer circumference diameter of the connecting flange of the cylinder body 12 and the cylinder head 11.
  • the clamp 19 When the clamp 19 is installed, its inner circumference is clamped on the outer circumference of the connecting flange of the cylinder body 12 and the cylinder head 11, and then the upper and lower sides of the flange are closed to form a flange, and the cylinder body 12 and the cylinder head 11 are fixedly connected by the contraction force during closing;
  • the clamp 19 shown in Figure 8 is a structure in which the flanges are formed after the ends are closed.
  • the clamp 19 can be made of metal material. After the metal clamp 19 is mounted on the outer circumference of the connecting flange of the cylinder body 12 and the cylinder head 11, the clamp 19 is placed on the upper and lower surfaces of the connecting flange to deform and form flanges, so that the upper and lower sides of the connecting flange are closed.
  • the clamp 19 can also be made of heat shrinkable material. When the temperature drops after the clamp 19 is hot-installed, the material deforms and shrinks, and the upper and lower sides of the connecting flange are automatically closed, thereby locking the connecting flange to fix the cylinder body 12 and the cylinder head 11. In order to further increase the sealing of the connection between the cylinder body 12 and the cylinder head 11, a layer of sealant can be applied to the inner side of the clamp 19 before installing and fixing it.
  • the piston 17 has a spherical surface, two side surfaces at a certain angle and a piston pin seat 172 at the lower part of the two side surfaces.
  • a sliding shoe 171 is protrudingly provided at the center of the spherical surface of the piston, and a piston pin seat 172 is provided below the spherical surface of the piston.
  • the piston pin seat 172 is a semi-cylindrical structure protruding from the two side surfaces of the piston, and the two ends of the semi-cylinder are spherical surfaces; the sliding shoe 171 has two planes, which serve as working surfaces, and the two working surfaces are symmetrically arranged on both sides of the semi-cylindrical axis of the piston pin seat 172; the axis of the semi-cylinder of the piston pin seat 172 is parallel to the two parallel surfaces of the sliding shoe 171.
  • the upper end of the turntable 15 is a plane, and a semi-cylindrical hole is recessed inwardly on the upper end plane to form a turntable pin seat 152.
  • a turntable shaft 151 protrudes from the lower center of the turntable 15, and a turntable spherical surface is between the upper end surface of the turntable 15 and the lower end turntable shaft 151;
  • the turntable pin seat 152 matches the piston pin seat 172, and the semi-cylindrical portion of the piston pin seat 172 is inserted into the semi-cylindrical hole of the turntable pin seat 152 to form a C-shaped cylindrical hinge structure;
  • the shoe seat 18 is cylindrical, and a slide groove 181 is provided on the lower end surface of the cylinder.
  • the width of the slide groove 181 matches the distance between the two parallel working surfaces of the piston shoe 171.
  • the length of the sliding shoe 171 is sufficient to meet the length of the sliding shoe 171 sliding back and forth in the sliding groove 181 when the turntable shaft 151 rotates one circle.
  • the length of the sliding groove 181 may penetrate the lower end surface of the sliding shoe seat 18, or may not penetrate and only meet the length of the sliding shoe 171 sliding back and forth.
  • the outer diameter of the sliding shoe seat 18 is matched with the diameter of the sliding shoe hole 11 on the cylinder head 11.
  • the sliding shoe seat 18 is placed in the sliding shoe seat hole 113.
  • the lower end surface of the sliding shoe seat 18 does not protrude from the inner spherical surface of the spherical inner cavity.
  • the axis of the sliding shoe seat 18 coincides with the axis of the sliding shoe seat hole 113.
  • the sliding shoe seat 18 can rotate freely around its axis in the sliding shoe seat hole 113.
  • a process groove is provided on the upper end surface of the sliding shoe seat 18, and a through process hole is provided between the process groove and the bottom of the sliding groove 181, which is convenient for installation.
  • a stop ring 13 and a sealing ring 14 are arranged on the mating surface of the turntable shaft 151 and the center hole of the cylinder seat 121; the turntable shaft 151 is adapted to the center hole of the cylinder seat 121, the turntable shaft 151 is a stepped shaft, and the center hole of the cylinder seat 121 is a corresponding stepped hole; a sealing ring 14 is arranged on the upper end journal of the turntable shaft 151 to prevent water from entering the motor, and the stop ring 13 prevents the sealing ring 14 from moving and forming a rotating support.
  • a half shaft head or a round shaft head is arranged at the lower end of the turntable shaft 151, which is used to connect with the output shaft of the power mechanism to transmit power.
  • the axis of the shoe seat hole 113 on the inner spherical surface of the cylinder head 11 and the axis of the central hole of the cylinder seat 121 both pass through the center of the spherical inner cavity, and the angle between the axis of the shoe seat hole 113 and the axis of the central hole of the cylinder seat 121 is ⁇ ;
  • the piston 17 and the turntable 15 are connected by a cylindrical hinge and then placed in the spherical inner cavity, the piston spherical surface, the turntable spherical surface and the spherical inner cavity have the same spherical center and form a sealed dynamic fit, and the matching surfaces of the cylindrical hinge form a sealed dynamic fit;
  • the shoe 171 at the upper end of the piston 17 is placed in the shoe seat In the slide groove 181 on the lower end surface of 18, the two parallel surfaces of the sliding shoe 171 fit with the two side surfaces of the slide groove 181 to form a sliding fit, and the sliding shoe 171 can slide back and forth
  • the ball diameter of the spherical inner cavity of the spherical pump 1 is 13 mm, and the diameter of the outer rotor motor 2 and the spherical pump 1 is only 19 mm.
  • the overall length after combination does not exceed 51 mm, so that the pump power unit composed of the spherical pump 1 and the motor reaches a smaller size.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

一种球形泵与电机组合体，包括球形泵（1）和外转子电机（2），外转子电机（2）的电机外转子（23）具有开口向上的圆桶型外转子体（231），在外转子体（231）的内圆周上布设有磁环（233），在外转子体（231）的圆桶底面中心设置有转子中心轴（232）；在具有中心轴孔的定子支架（242）的外周设置有线圈绕组（241），定子支架（242）的上端设置一连接部（243）；缸体座（121）与连接部（243）固定连接，转盘轴（151）的下端面与转子中心轴（232）的上端面啮合传输扭矩；该技术方案的优点是：体积小，充分发挥了球形泵（1）可微型化的优势；外转子电机（2）与球形泵（1）连接装配方便。

Description

球形泵与电机组合体 技术领域
本专利涉及一种液体泵，特别是一种球形泵与电机组合体。
背景技术
球形泵技术是近年来新发明的全新原理的变容式动力机构，已有多项中国专利，其优点是泵零件数量少，密封可靠，无进、排液阀，便于超微型化设计，可实现高速运转，噪音低，目前球形泵的各种应用正在不断研发中。如专利号为“ZL202220285836.0”、专利名称为“微型球形泵”的中国专利，最显著的特征就是体积小、重量轻，可适用于洗牙器、带冲洗功能的电动牙刷、便携式消防设备等对泵的体积有严格限制的场合，球形泵相比于其他泵体积大幅减小，但是由于球形泵为新型水泵，目前尚没有与之体积匹配的电机，往往是球形泵的体积小，但与之匹配的电机体积庞大，使球形泵的体积小的优势不能充分发挥，无法满足便携式设备对泵及电机整体微小化需求。
发明内容
本专利的目的就是设计一种球形泵与电机组合体，利用最新发明并投入应用的球形泵技术，与其所使用的电机进行一体化设计，从而是球形泵和电机组合后体积最小化。
本专利的技术方案是：球形泵与电机组合体，包括球形泵和外转子电机，所述球形泵的转盘轴以球形泵下部的缸体座中心孔作为旋转支撑，所述外转子电机的电机外转子具有开口向上的圆桶型外转子体，在外转子体的内圆周上布设有磁环，在外转子体的圆桶底面中心设置有转子中心轴；在所述外转子电机 的电机定子上具有中心轴孔的定子支架的外周设置有多组线圈和磁钢构成的线圈绕组，转子中心轴装入定子支架的中心轴孔内形成转动副，定子支架和线圈绕组置于转子中心轴与磁环之间的环形空间内，定子支架的上端凸出于线圈绕组的上端构成一连接部；所述缸体座与所述连接部固定连接，转盘轴与转子中心轴同轴线，转盘轴的下端与转子中心轴的上端相啮合传输扭矩；
进一步的，所述连接部为开口向上的圆柱凹槽，所述缸体座的外圆周与连接部凹槽内圆周相适配，缸体座置于连接部凹槽形成过盈配合，从而把球形泵与外转子电机的定子支架固定连接；
进一步的，在所述定子支架的中心轴孔与所述转子中心轴的配合部分设置有轴套作为转子中心轴的旋转支撑；
进一步的，所述轴套分为上下两段，轴套内孔直径小于定子支架的中心轴孔的直径，轴套预先镶嵌在定子支架的中心轴孔内；所述轴套的材质为铜或者其它耐磨材料；
进一步的，在转盘轴的下端设置有半圆轴头，在转子中心轴的上端面上设置有与转盘轴半圆轴头相配的半圆轴头，转盘轴下端与转子中心轴上端通过半圆轴头相啮合形成转动连接；
进一步的，在转盘轴与转子中心轴啮合部分的外圆周上设置有圆柱型的套筒，套筒固定包覆在转盘轴半圆轴的上部圆周上或者固定包覆在转子中心轴半圆轴的下部圆周上；
进一步的，转盘轴下端和转子中心轴的上端为圆轴头，在转盘轴下端和转子中心轴上端的啮合部分的外周设置一套筒，套筒分别以过盈配合的方式卡持在转盘轴下端和转子中心轴上端圆轴头上，通过套筒使转盘轴下端和转子中心 轴上端连接形成转动配合；
进一步的，所述球形泵包含缸体和缸盖，缸体和缸盖固定连接形成球形内腔，缸体和缸盖固定连接方式为超声波焊接、螺钉连接、胶粘接、或通过卡箍连接中的任意一种；其中，卡箍连接中卡箍的材料为金属或者热缩塑料；
进一步的，所述外转子电机还包括一电机保护壳，电机保护壳的上端开口部分与连接部的外圆周密封固定连接；
进一步的，所述电机保护壳为开口向上的圆柱桶体，在圆柱桶体的开口处内圆周与连接部的外圆周之间设置有保护壳定位环，所述保护壳定位环分别与电机保护壳内圆周和连接部外圆周形成密封固定连接；保护壳定位环的上端形状与球形泵缸体的下端形状相适配。
本专利的优点是：
1)球形泵与外转子电机匹配，外转子电机体积小，其定子支架凸出于电机形成连接部，连接处设置嵌入式结构，减小了球形泵和电机连接的轴向尺寸，球形泵与外转子电机组合后形成的泵动力单元体积小，结构紧凑，适合于各种对体积要求严格的场合，充分发挥了球形泵体积小的优势；
2)球形泵下端缸体座以过盈配合的方式嵌入到外转子电机连接部的凹槽内，不需要其它连接件，只需要轻轻压入即可完成装配，同时安装后转子中心轴与球形泵转盘轴直接啮合，球形泵与外转子电机连接安装方便，装配效率高，安装精度高，电机功率损耗小。
附图说明
图1：本专利所述球形泵和电机组合体外形结构示意图；
图2：图1中A-A剖视图；
图3：图2中D-D剖视图；
图4：球形泵滑靴座立体结构示意图；
图5：球形泵缸盖立体结构示意图；
图6：球形泵缸体立体结构示意图；
图7：缸体和缸盖通过卡箍固定连接结构示意图；
图8：卡箍立体结构示意图；
图9：球形泵活塞立体结构示意图；
图10：球形泵转盘立体结构示意图；
图中：
1-球形泵；11-缸盖；111-进水端口；112-出水端口；113-滑靴座孔；114-
进水槽；115-出水槽；12-缸体；121-缸体座；13挡环；14-密封圈；15-转盘；151-转盘轴；152-转盘销座；16-“O”型圈；17-活塞；171-滑靴；172-活塞销座；18-滑靴座；19-卡箍；100-工作腔；
2-外转子电机；21-电机保护壳；22-保护壳定位环；23-电机外转子；231-
外转子体；232-转子中心轴；233-磁环；24-电机定子；241-线圈绕组；242-定子支架；243-连接部；25-轴套；
3-套筒。
具体实施方式
下面结合附图和具体实施方式对本专利进行详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
如图1至图3所示，本专利所述的球形泵与电机组合体作为动力单元，可用于洗牙器，球形泵1的转盘轴151作为球形泵1的动力输入轴，以球形泵1 下部的缸体座121的中心孔作为旋转支撑，如图6、图10所示，缸体座121是球形泵1的缸体12下端凸出的圆柱，既是转盘轴151的旋转支撑又是球形泵1与外转子电机2的连接件。
本专利中的外转子电机2是根据球形泵1对电机的体积要求，在满足其电学性能的情况下，在结构上适应于球形泵1而设计，外转子电机2包括电机外转子23、电机定子24和电机保护壳21，外转子电机2的电机外转子23具有开口向上的圆桶型外转子体231，在外转子体231的内圆周上固定有多组磁铁构成的磁环233，在外转子体231的圆桶底面中心固定设置有转子中心轴232，磁环233以及转子中心轴232随同外转子体231同步旋转。电机定子24包括定子支架242和布设在定子支架242外圆周上的多组线圈和磁钢组成的多个线圈绕组241，本专利中线圈绕组241为9组，均布在定子支架242的外圆周上，从而构成电机定子24。在定子支架242的中心设置有上下贯通的中心轴孔，转子中心轴232从下端插入定子支架242的中心轴孔内，定子支架242和线圈绕组241置于转子中心轴232与外转子的磁环233之间的环形空间内，转子中心轴232的外径与定子支架242的中心轴孔的直径相适应，在定子支架242的中心轴孔内形成转动副。
定子支架242的上端凸出于线圈绕组241的上端构成一连接部243；连接部243为开口向上的圆柱凹槽，用于连接球形泵1，所述球形泵1的缸体座121的外圆周与连接部243凹槽内圆周相适配，缸体座121置于连接部243凹槽内形成过盈配合，从而把球形泵1与外转子电机2的定子支架241固定连接。连接部243可以作为独立零件固定连接在定子支架242上端，也可以与定子支架242设计为一体，作为定子支架242的向上延伸部分；缸体座121与连接部243固定连接后，转盘轴151与转子中心轴232同轴线，转盘轴151的下端面与转子 中心轴232的上端面相啮合传输扭矩，使外转子电机2带动球形泵1运转。
转盘轴151的下端面与转子中心轴232的上端面相啮合有多种方式，可以通过内花键间连接，即在转盘轴151下端面和转子中心轴232的上端面上分别设置外花键和内花键，通过花键啮合连接，也可采取方轴头和方孔啮合连接，本实施例中采用半圆轴头配合传递扭矩，如图7所示，在转盘轴151的下端设置有半圆轴头，在转子中心轴232的上端设置有与转盘轴151半圆轴头相配的半圆轴头，转盘轴151与转子中心轴232通过半圆轴头的扁轴部分相啮合形成转动连接传输扭矩。为了半圆轴头连接精确和可靠，进一步的，在转盘轴151与转子中心轴232啮合部分的外圆周上设置有圆柱型的套筒3，套筒3固定包覆在转盘轴151半圆轴的上部圆周上或者固定包覆在外转子中心轴半圆轴头下部圆周上。转盘轴151下端和转子中心轴232上端也可以采用套筒3分别与两端的圆轴头过盈配合实现转动连接，此种连接方式中，转盘轴151下端和转子中心轴232上端不需要制作半圆轴头，连接方式简单，操作方便。
为了减小转子中心轴232与定子支架242的中心轴孔之间的旋转摩擦，降低功耗，减小磨损，在所述定子支架242的中心轴孔与所述转子中心轴232的配合部分设置有轴套25作为转子中心轴232的旋转支撑；轴套25的材质为铜或者其它耐磨材料；所述轴套25分为上下两段布置，轴套25内孔直径略小于定子支架242的中心轴孔的直径，轴套25可预先镶嵌在定子支架242的中心轴孔内。
为了防止电机进水和对电机进行安全防护，外转子电机2还包括一电机保护壳21，电机保护壳21的上端开口部分与连接部243的外圆周密封固定连接；进一步的，电机保护壳21为开口向上的圆柱桶体，圆柱桶类似于水桶，在圆柱桶体的开口处内圆周与连接部243的外圆周之间设置有保护壳定位环22，保护 壳定位环22分别与电机保护壳21内圆周和连接部243外圆周形成密封固定连接；实际上产中，采用过盈配合的方式把保护壳定位环22压持在电机保护壳21的上端开口内圆周与连接部243的外圆周间。保护壳定位环22的上端形状与球形泵1的缸体12下端圆弧形状相适配。
本专利中球形泵1采用微型球形泵，如图2、图4至图10所示，球形泵1包括缸盖11、缸体12、转盘15、活塞17和滑靴座18，缸体12和缸盖11具有半球形内腔，缸体12和缸盖11固定连接后形成球形内腔；在缸盖11的半球形内腔上设置有滑靴座孔113、进水槽114和出水槽115，在缸盖11的上端外壁上设置有进水端口111和出水端口112，进水端口111与进水槽114连通，出水端口112与出水槽115连通；进水端口111和出水端口112分别用来连接洗牙器的水槽和喷嘴；滑靴座孔113设置在半球形内腔的球面中心，滑靴座孔113的轴线与缸盖11半球形内腔的端面垂直，在该端面上有突起的定位环，用于与缸体12端面连接时配合定位。
在缸体12的下端固定连接一缸体座121，缸体座121与缸体12连为一体，在缸体座121内设置有从缸体半球形内腔球面上连通缸外的中心孔，该中心孔作为转盘轴151的旋转支撑，中心孔的轴线与缸体12半球形内腔的端面的夹角为α，α的大小范围为5到20度，本实施例中优先选取α为15度。在缸体12和缸盖11的半球形内腔的端面上设置有定位结构和连接法兰，在缸盖11端面上设置有突出的定位环，在缸体12端面上设置有与之相配的定位槽。在缸体112与缸盖111端面连接处设置有“O”型圈16。缸体12和缸盖11可通过螺钉固定连接，也可以通过定位结构定位后通过超声波焊接的方式固定连接，也可以用胶直接粘接的方式固定连接，图1和图2中缸体12和缸盖11可采用超声波焊接或者用胶粘接固定。缸体12和缸盖11也可以采用卡箍19固定的方式连接， 如图7-图8所示，缸体12和缸盖11的结构与前述无变化，只是增加一卡箍19，卡箍19安装前为圆筒形，圆筒内圆周直径与缸体12和缸盖11的连接法兰的外圆周直径相适配，卡箍19安装时其内圆周卡持在缸体12和缸盖11的连接法兰外圆周上后，再在法兰的上下两侧收口形成翻边，通过收口时的收缩力把缸体12和缸盖11固定连接；图8中所示卡箍19为两边收口后形成翻边的结构。卡箍19可以选用金属材料，金属材料卡箍19套装在缸体12和缸盖11连接法兰的外圆周上后再使卡箍19置于连接法兰上下两面处发生变形形成翻边，即使连接法兰的上下两侧收口；卡箍19也可以选择热缩材料，卡箍19热装后温度降低时材料变形收缩，在连接法兰的上下两侧自动形成收口，从而锁紧连接法兰使缸体12和缸盖11固定连接。为了进一步增加缸体12和缸盖11连接处的密封性，安装卡箍19固定前，可以在卡箍19内测涂抹一层密封胶。
如图2、图9所示，活塞17具有球形面、两个成一定角度的侧面和在两侧面下部的活塞销座172，在活塞球面的球面中央突出设置有滑靴171，在活塞球面的下方设置有活塞销座172，活塞销座172为突出于活塞两侧面的半圆柱结构，半圆柱的两端为球面；滑靴171具有两平面，该两平面作为工作面，该两工作面对称布置在活塞销座172的半圆柱轴线的两侧；活塞销座172的半圆柱的轴线与滑靴171的两平行面平行。
如图2、图10所示，转盘15的上端为平面，在上端平面上向内凹入一半圆柱孔构成转盘销座152，在转盘15的下部中心突出一转盘轴151，在转盘15的上端面与下端转盘轴151之间为转盘球面；转盘销座152与活塞销座172相配，活塞销座172的半圆柱插入转盘销座152的半圆柱孔中形成C型柱面铰链结构；
如图4所示，滑靴座18为圆柱形，在圆柱的下端面上设置有滑槽181，滑槽181的宽度与活塞的滑靴171的两平行工作面的间距大小相适配，滑槽181 的长度以满足转盘轴151每旋转一周时滑靴171在滑槽181内往复滑动的长度即可，滑槽181的长度可在滑靴座18的下端面贯通，也可以不贯通只是满足滑靴171可往复滑动的长度即可。滑靴座18的外圆直径与缸盖11上滑靴孔11的直径相适配，滑靴座18置于滑靴座孔113内，滑靴座18的下端面不突出于球形内腔内球面，滑靴座18的轴线与滑靴座孔113的轴线重合，滑靴座18在滑靴座孔113内可以绕其轴线自由转动，为了安装和减小滑靴座18的上端面与滑靴座孔113的底面之间的摩擦，在滑靴座18的上端面上设置有工艺槽，在工艺槽和滑槽181底部之间设置有贯通的工艺孔，方便安装。
在转盘轴151与缸体座121的中心孔的配合面上设置有档环13和密封圈14；转盘轴151与缸体座121的中心孔相适配，转盘轴151为台阶轴，缸体座121的中心孔为相应的台阶孔；在转盘轴151上端轴颈上设置有密封圈14防止水进入电机，档环13防止密封圈14移动和形成旋转支撑。在转盘轴151的下端设置有半轴头或者圆轴头，用于与动力机构的输出轴连接传输动力。
缸盖11内球面上的滑靴座孔113的轴线与缸体座121的中心孔的轴线都通过球形内腔的球心，滑靴座孔113的轴线与缸体座121的中心孔轴线的夹角为α；活塞17和转盘15通过柱面铰链连接后置于球形内腔内，活塞球面、转盘球面与球形内腔具有相同的球心并形成密封动配合，柱面铰链的各配合面之间形成密封动配合；活塞17上端的滑靴171置入滑靴座18下端面的滑槽181中，滑靴171的两平行面与滑槽181的两侧面相贴合形成滑动配合，滑靴171在滑槽181内可往复滑动形成滑槽摆动机构；驱动转盘轴151转动，活塞17和转盘15绕柱面铰链相对摆动，滑靴171在滑槽181内往复滑动，在所述转盘15的上端面、所述活塞17的两侧面与所述球形内腔之间形成容积交替变化的两个工作腔100。
本实施例中，球形泵1的球型内腔的球径为13毫米，外转子电机2和球形泵1直径只有19毫米，组合后整体长度不超过51毫米，从而使球形泵1与电机组合的泵动力单元体积达到更小尺寸，用于洗牙器产品时，使洗牙器的尺寸大幅减小，品质大大提升。

Claims (10)

  1. 球形泵与电机组合体，其特征是：包括球形泵(1)和外转子电机(2)，所述球形泵(1)的转盘轴(151)以球形泵(1)下部的缸体座(121)中心孔作为旋转支撑，所述外转子电机(2)的电机外转子(23)具有开口向上的圆桶型外转子体(231)，在外转子体(231)的内圆周上布设有磁环(233)，在外转子体(231)的圆桶底面中心设置有转子中心轴(232)；在所述外转子电机(2)的电机定子(24)上具有中心轴孔的定子支架(242)的外周设置有多组线圈和磁钢构成的线圈绕组(241)，转子中心轴(232)装入定子支架(242)的中心轴孔内形成转动副，定子支架(242)和线圈绕组(241)置于转子中心轴(232)与磁环(233)之间的环形空间内，定子支架(242)的上端凸出于线圈绕组(241)的上端构成一连接部(243)；所述缸体座(121)与所述连接部(243)固定连接，转盘轴(151)与转子中心轴(232)同轴线，转盘轴(151)的下端与转子中心轴(232)的上端相啮合传输扭矩。
  2. 根据权利要求1所述的球形泵与电机组合体，其特征是：所述连接部(243)为开口向上的圆柱凹槽，所述缸体座(121)的外圆周与连接部(243)凹槽内圆周相适配，缸体座(121)置于连接部(243)凹槽形成过盈配合，从而把球形泵(1)与外转子电机(2)的定子支架(242)固定连接。
  3. 根据权利要求1所述的球形泵与电机组合体，其特征是：在所述定子支架(242)的中心轴孔与所述转子中心轴(232)的配合部分设置有轴套(25)作为转子中心轴(232)的旋转支撑。
  4. 根据权利要求3所述的球形泵与电机组合体，其特征是：所述轴套(25)分为上下两段，轴套(25)内孔直径小于定子支架(242)的中心轴孔的直径，轴套(25)预先镶嵌在定子支架(242)的中心轴孔内；所述轴套(25)的材质为铜或者其它耐磨材料。
  5. 根据权利要求1所述的球形泵与电机组合体，其特征是：在转盘轴(151)的下端设置有半圆轴头，在转子中心轴(232)的上端面设置有与转盘轴(151)半圆轴头相配的半圆轴头，转盘轴(151)下端与转子中心轴(232)上端通过半圆轴头相啮合形成转动连接。
  6. 根据权利要求5所述的球形泵与电机组合体，其特征是：在转盘轴(151)与转子中心轴(232)啮合部分的外圆周上设置有圆柱型的套筒(3)，套筒(3)固定包覆在转盘轴(151)半圆轴的上部圆周上或者固定包覆在转子中心轴(232)半圆轴的下部圆周上。
  7. 根据权利要求1所述的球形泵与电机组合体，其特征是：转盘轴(151)下端和转子中心轴(232)的上端为圆轴头，在转盘轴(151)下端和转子中心轴(232)上端的啮合部分的外周设置一套筒(3)，套筒(3)分别以过盈配合的方式卡持在转盘轴(151)下端和转子中心轴(232)上端圆轴头上，通过套筒(3)使转盘轴(151)下端和转子中心轴(232)上端连接形成转动配合。
  8. 根据权利要求1所述的球形泵与电机组合体，其特征是：所述球形泵(1)包含缸体(12)和缸盖(11)，缸体(12)和缸盖(11)固定连接形成球形内腔，缸体(12)和缸盖(11)固定连接方式为超声波焊接、螺钉连接、胶粘接、或通过卡箍连接中的任意一种；其中，卡箍连接中卡箍(19)的材料为金属或者热缩塑料。
  9. 根据权利要求1所述的球形泵与电机组合体，其特征是：所述外转子电机(2)还包括一电机保护壳(21)，电机保护壳(21)的上端开口部分与连接部(243)的外圆周密封固定连接。
  10. 根据权利要求9所述的球形泵与电机组合体，其特征是：所述电机保护壳(21)为开口向上的圆柱桶体，在圆柱桶体的开口处内圆周与连接部(243) 的外圆周之间设置有保护壳定位环(22)，所述保护壳定位环(22)分别与电机保护壳(21)内圆周和连接部(243)外圆周形成密封固定连接；保护壳定位环(22)的上端形状与球形泵(1)的缸体(12)下端形状相适配。
PCT/CN2023/123380 2022-10-28 2023-10-08 球形泵与电机组合体 WO2024088034A1 (zh)

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CN111835173A (zh) * 2019-04-15 2020-10-27 宁波利佳青石电气科技有限公司 外转子无刷电机ro泵
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