CN107313948B - Motor pump and dish washer - Google Patents

Motor pump and dish washer Download PDF

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Publication number
CN107313948B
CN107313948B CN201710637233.6A CN201710637233A CN107313948B CN 107313948 B CN107313948 B CN 107313948B CN 201710637233 A CN201710637233 A CN 201710637233A CN 107313948 B CN107313948 B CN 107313948B
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CN
China
Prior art keywords
motor
stator
pump
assembly
rotor
Prior art date
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Active
Application number
CN201710637233.6A
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Chinese (zh)
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CN107313948A (en
Inventor
罗熙
武秋红
唐剑武
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.)
Guangdong Welling Motor Manufacturing Co Ltd
Original Assignee
Guangdong Welling Motor Manufacturing Co Ltd
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Filing date
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Priority to CN201710637233.6A priority Critical patent/CN107313948B/en
Publication of CN107313948A publication Critical patent/CN107313948A/en
Application granted granted Critical
Publication of CN107313948B publication Critical patent/CN107313948B/en
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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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4217—Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
    • 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
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
    • 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
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • 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
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/132—Submersible electric motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

Abstract

The invention relates to the field of pumps, and discloses a motor pump and a dish washer, wherein the motor pump comprises a motor and a pump body, the pump body comprises a pump shell (1), the pump shell (1) is arranged on the motor and faces to a stator assembly (4) of the motor, and an axial interval for conveying pumping medium is formed between the pump shell and the stator assembly (4) of the motor so as to enable the pumping medium to be in contact with the stator assembly (4) of the motor. The motor pump provided by the invention can save energy while prolonging the service life of the motor pump.

Description

Motor pump and dish washer
Technical Field
The invention relates to the field of pumps, in particular to a motor pump and a dish washer with the motor pump.
Background
The motor pump generally comprises a motor and a pump body, the pump body generally comprises a pump shell and an impeller, the impeller is fixedly connected with a rotor shaft of the motor, and the impeller is used for driving a pump medium to enter from an inlet on the pump shell and then to be discharged from an outlet on the pump shell under the driving of the rotor shaft.
The motor can generate a large amount of heat in the running process, on one hand, the heat is easy to damage parts of the motor, and the service life of the motor is shortened; on the other hand, the generated heat is not effectively utilized in the motor pump, and the heat dissipation obviously wastes resources under the condition of heating requirement.
The existing motor pump has structural design defects, so that the motor pump cannot effectively utilize heat and prolong the service life of the motor. Such as motor pumps in automobiles, the rotor shaft is usually designed as a hollow shaft, and heat generated during the operation of the motor is rapidly transferred through the flow of cooling liquid in the hollow shaft, so that the safety of components such as the motor, a controller and the like and the cooling of an engine in a vehicle are ensured.
For another example, in a motor pump used in a dishwasher, a motor in the motor pump is generally designed to be assembled by a separate pump body, and heat generated during operation of the motor cannot be applied to backflow liquid of the pump body, so that heat generated during operation of the motor is dissipated and wasted.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a technical scheme capable of saving energy while prolonging the service life of a motor pump.
In order to achieve the above object, an aspect of the present invention provides a motor pump including a motor and a pump body including a pump housing mounted on the motor and facing each other with a stator assembly of the motor, and having an axial space formed therebetween for conveying a pumping medium to enable the pumping medium to be in contact with the stator assembly of the motor.
Preferably, the motor includes a stator assembly, a rotor assembly coaxially disposed within the stator assembly, and a motor end cap for supporting the stator assembly and the rotor assembly.
Preferably, the motor end cap has a cylindrical cavity formed therein such that a portion of the stator assembly in an axial direction is received within the cylindrical cavity; another portion of the stator assembly in the axial direction is housed within the pump casing.
Preferably, a rotor assembly support is formed at an end of the stator assembly facing the pump housing, an end of the stator assembly remote from the pump housing and an end of the motor end cover are opposite to each other, and the rotor assembly is rotatably supported on the end of the motor end cover and the rotor assembly support.
Preferably, a first bearing is mounted inside an end portion of the motor end cover, a second bearing is mounted inside the rotor assembly support portion, and the rotor assembly is rotatably supported on the end portion of the motor end cover and the rotor assembly support portion through the first bearing and the second bearing.
Preferably, the rotor assembly comprises: a rotor shaft and a rotor coaxially secured to the rotor shaft, the rotor shaft extending axially through the first and second bearings to an end within an axial space between the pump housing and the stator assembly.
Preferably, the motor pump further comprises:
a first vibration dampening ring disposed between the first bearing and the motor end cap for dampening vibration transfer between the first bearing and the motor end cap;
a second vibration damping ring disposed between the second bearing and the rotor assembly support for damping transmission of vibrations between the second bearing and the rotor assembly support;
and a sealing plug disposed between the rotor assembly support and the rotor shaft and outside of the second bearing for preventing pumped medium from entering the stator windings and rotor of the stator assembly.
Preferably, a cylindrical cavity for accommodating the other part of the stator assembly in the axial direction is formed in the pump shell, and a pumping medium inlet and a pumping medium outlet are formed in the pump shell.
Preferably, the motor pump is a liquid pump, the stator assembly comprises a stator core, a stator winding wound on the stator core, and a heat-conducting insulating layer coated on the outer surface of the stator core to isolate the stator core and the stator winding, and the heat-conducting insulating layer is further used for isolating the stator core and the stator winding from the pumping medium.
Preferably, the motor pump is a gas pump; the stator assembly comprises a stator core, a stator winding wound on the stator core and an insulating layer arranged between the stator core and the stator winding and used for isolating the stator core and the stator winding; the gas pump is capable of directly contacting the stator core when pumping gas.
A second aspect of the invention provides a dishwasher comprising a motor pump, wherein the motor pump is the motor pump according to the first aspect of the invention.
The technical scheme provided by the invention has the following beneficial effects:
in the motor pump provided by the invention, the pump body and the motor are arranged together, the pump shell of the pump body and the stator assembly of the motor face each other, and an axial interval is formed between the pump shell and the stator assembly. As such, when the motor pump is started, the pumped medium flows within the axial interval. On one hand, as the stator component is a main heating component when the motor runs, the pumping medium directly contacts the stator component, so that the motor can be cooled more effectively; on the other hand, the heat emitted by the motor can be directly transferred to the pumping medium, and for occasions needing to heat the pumping medium, such as a blower and a dish washer, the direct contact of the stator assembly and the pumping medium can effectively save the energy source needed for heating the pumping medium. Taking a dish washer as an example, pumping media, namely washing water, are output by a motor pump and then are generally connected with a heating pipe, and are heated by the heating pipe and then sprayed to the inner container of the dish washer by a spray arm. If the heat of the motor heat dissipation is absorbed when the washing water passes through the motor pump, less electric energy is provided for the heating pipe to heat the washing water to a preset temperature, so that the electric energy is saved.
Drawings
Fig. 1 is a schematic longitudinal section of a motor pump according to an embodiment of the present invention.
Description of the reference numerals
1-Pump case 2-sealing plug
3-pumped Medium Outlet 4-stator Assembly
5-rotor shaft 6-first vibration damping ring
7-first bearing 8-rotor
9-second damping ring 10-pumped Medium Inlet
11-Motor end cover 12-rotor Assembly support
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise specified, terms such as "upper, lower, left, and right" are used to generally refer to the upper, lower, left, and right sides of the drawings. "inner and outer" means inner and outer relative to the contour of the component itself.
Referring to fig. 1, a first aspect of an embodiment of the present invention provides a motor pump including a motor and a pump body including a pump casing 1, the pump casing 1 being mounted on the motor and facing each other with a stator assembly 4 of the motor, and forming an axial space therebetween for conveying a pumping medium, that is, through which the pumping medium flows, with the stator assembly 4 of the motor, so that the pumping medium can be brought into contact with the stator assembly 4 of the motor. On the one hand, since the stator assembly 4 is the main heating component when the motor operates, the pumping medium directly contacts the stator assembly 4, so that the motor can be cooled more effectively; on the other hand, the heat emitted by the motor can be directly transferred to the pumping medium, and for occasions needing to heat the pumping medium, such as a blower and a dish washer, the direct contact of the stator assembly 4 with the pumping medium can effectively save the energy source needed for heating the pumping medium. Taking a dish washer as an example, pumping media, namely washing water, are output by a motor pump and then are generally connected with a heating pipe, and are heated by the heating pipe and then sprayed to the inner container of the dish washer by a spray arm. If the heat of the motor heat dissipation is absorbed when the washing water passes through the motor pump, less electric energy is provided for the heating pipe to heat the washing water to a preset temperature, so that the electric energy is saved.
Typically, the motor comprises a stator assembly 4, a rotor 8 assembly coaxially arranged within the stator assembly 4, and a motor end cap 11 for supporting the stator assembly 4 and the rotor 8 assembly. The rotor 8 assembly rotates when the stator assembly 4 is energized with alternating current, converting electrical energy into mechanical energy.
In order to support the stator assembly 4 in the motor end cover 11, a cylindrical cavity is formed in the motor end cover 11, which is adapted to the shape and size of the stator assembly 4. As such, a portion of the stator assembly 4 in the axial direction is received within the cylindrical cavity. And, the stator assembly 4 is maintained in a substantially coaxial state with the cylindrical cavity. Another part of the stator assembly 4 in the axial direction is accommodated in the pump housing 1. An axial space is formed between the end face of the stator assembly 4 facing the pump housing 1 and the inner end face of the pump housing 1. In operation of the electric motor pump, the pumping medium is conveyed via the axial gap and may be in direct contact with the stator assembly 4, creating heat exchange.
Referring to the protrusions above the motor in fig. 1, in one embodiment, in order to position the stator assembly 4 within the motor end cap 11, the motor end cap 11 is also formed with radially outwardly protruding detents. A boss that can be accommodated in the positioning groove is formed on the outer peripheral surface of the stator assembly 4. When the stator assembly 4 is installed, the protruding part of the stator assembly 4 can be accommodated in the positioning groove of the motor end cover 11, so that the stator assembly 4 is positioned, and dislocation of the stator assembly 4 relative to the motor end cover 11 is avoided.
In order to support the rotor 8 assembly so that the rotor 8 assembly remains coaxial with the stator assembly 4, the rotor 8 assembly may be coaxially supported within the stator assembly 4 as follows. The end of the stator assembly 4 facing the pump housing 1 is formed with a rotor assembly support 12, and the end of the stator assembly 4 remote from the pump housing 1 and the end of the motor end cap 11 are opposite to each other. That is, the rotor assembly support 12 is spaced from the end of the motor end cap 11 by the stator assembly 4. The rotor 8 assembly is supported at one axial end portion by an end portion of the motor end cover 11 and at the other axial end portion by the rotor assembly support portion 12. Whereby coaxial support of the rotor 8 assembly within the stator assembly 4 is achieved. In addition, since the rotor 8 assembly can rotate with respect to the stator assembly 4 to convert electric energy into mechanical energy, the rotor 8 assembly is rotatably supported on the end of the motor end cover 11 and the rotor assembly support 12.
Preferably, the rotor 8 assembly is rotatably supported on the end of the motor end cover 11 and the rotor assembly support 12 as follows. The end inside of the motor end cover 11 is formed with a first bearing 7 mounting cavity, for example, the center of the end inside, the first bearing 7 is mounted in the first bearing 7 mounting cavity, the inside of the rotor assembly support 12 is formed with a second bearing mounting cavity, for example, the center of the inner side, the second bearing mounting cavity is mounted in the second bearing mounting cavity, and the rotor 8 assembly is rotatably supported on the end of the motor end cover 11 and the rotor assembly support 12 through the first bearing 7 and the second bearing.
Generally, the rotor 8 assembly includes a rotor shaft 5 and a rotor 8 coaxially secured outside the rotor shaft 5. The rotor 8 is located within the stator assembly 4 and the rotor shaft 5 extends axially through the first bearing 7 and the second bearing to an end within an axial space between the pump housing 1 and the stator assembly 4. The pumped medium transport can be driven by mounting impellers at the ends of the rotor shaft 5 within said axial spacing.
The rotor shaft 5 is rotatably supported on the end of the motor cover 11 and the rotor assembly support 12 by the first bearing 7 and the second bearing, and vibration will be inevitably generated when the rotor shaft 5 rotates. In order to suppress the transmission of vibrations of the rotor 8 to the motor end cover 11 and/or the rotor assembly support 12, the motor end cover 11 and/or the rotor assembly support 12 are deformed. The motor pump further includes:
the first vibration damping ring 6 is arranged between the first bearing 7 and the motor end cover 11, and is used for supporting the first bearing 7 in a first bearing 7 installation cavity inside the end part of the motor end cover 11, so that the rotor shaft 5 is not in direct contact with the motor end cover 11, and vibration generated when the rotor shaft 5 drives the first bearing 7 to rotate is transmitted to the motor end cover 11 after being damped by the first vibration damping ring 6. Thereby, the transmission of vibration between the first bearing 7 and the motor end cover 11 can be suppressed.
Similarly, a second vibration damping ring 9 is disposed between the second bearing and the rotor assembly supporting portion 12, and the second vibration damping ring 9 is used for supporting the second bearing in the second bearing mounting cavity inside the rotor assembly supporting portion 12, so that the rotor shaft 5 is not in direct contact with the rotor assembly supporting portion 12, and vibration generated when the rotor shaft 5 drives the second bearing to rotate is transmitted to the rotor assembly supporting portion 12 after being damped by the second vibration damping ring 9. Thereby, transmission of vibration between the second bearing and the rotor assembly support 12 can be suppressed.
In addition, since the end portion of the rotor shaft 5 needs to extend into the axial space after penetrating the rotor assembly support portion 12, a through hole for penetrating the rotor shaft 5 in the axial direction is formed in the rotor assembly support portion 12. In order to prevent pumped medium from entering the rotor 8 and the stator windings of the stator assembly 4 through this through hole, the normal use of the motor is affected. A sealing plug 2 is arranged between the rotor assembly support 12 and the rotor shaft 5, wherein the sealing plug 2 is located outside the second bearing, and the pumping medium can be prevented from entering the stator winding of the stator assembly 4 and the rotor 8 by the sealing action of the sealing plug 2. And, because sealing plug 2 is located the outside of second bearing, consequently, can also block pumping medium to get into in the bearing, avoid pumping medium to influence the normal use of bearing.
As previously described, another portion of the stator assembly 4 in the axial direction is housed within the pump casing 1 in order to house the stator assembly 4. A cylindrical cavity is formed in the pump housing 1, which is shaped and sized to accommodate the stator assembly 4. The opening of the cylindrical cavity and the opening of the motor end cover 11 are opposite to each other, and can be fixed with the motor end cover 11 to form a cylindrical cavity. In order to convey the pumping medium, the pump housing 1 is further provided with a pumping medium inlet 10 and a pumping medium outlet 3.
As shown in fig. 1, the pumping medium inlet 10 may be formed at an end surface portion of the pump casing 1 opposite to the stator assembly 4, and the pumping medium outlet 3 may be formed at a lower portion of the pump casing 1. The pumping medium inlet 10 axially penetrates through the end face part and is communicated with the input pipeline, and the pumping medium outlet 3 is communicated with the output pipeline. When the motor is operated, the pumping medium enters from the pumping medium inlet 10 and is output from the pumping medium outlet 3 under the driving action of the impeller.
The general stator assembly 4 is composed of a stator core, a stator winding wound on the stator core and an insulating layer for isolating the stator core and the stator winding, wherein the insulating layer can be only laid on the surface of the stator core, which is contacted with the stator winding, or can be laid on the whole outer surface of the stator core or part of the outer surface of the stator core.
There are various types of motor pumps, such as gas pumps, for example air pumps used in blowers. Such as a liquid pump, for example a washing pump used in a dishwasher. The specific structure of the insulating layer corresponding to different motor pumps may be different. Taking the air pump used in the blower as an example, the air does not damage the stator core in the stator assembly 4. Accordingly, the insulating layer may be applied only to the surface of the stator core in contact with the stator winding. In this case, the end face of the stator core will be in direct contact with the pumping medium when the air pump pumps air. Cold air enters from the pumping medium inlet 10, is preheated by the stator core, is output from the pumping medium outlet 3, and is heated to a preset temperature by a heating pipe or a heating wire. Because the cold air directly contacts the stator core, the heat emitted by the stator core can be absorbed, and after the heat is absorbed, the cold air is discharged from the pumping medium outlet 3, and the new cold air enters the axial interval to cool the stator core. That is, the air for cooling the stator core is cool air having a low temperature in a flow updated state, and does not rise in temperature with an increase in absorbed heat. Therefore, the cooling effect is better. In addition, in the case of heating, for example, in the case of blowing hot air, the cold air is preheated when passing through the motor pump, so that the air can be heated to a predetermined temperature by providing smaller heating power, which is beneficial to saving energy.
As for the liquid pump, taking a washing pump in a dishwasher as an example, since the stator core cannot be in contact with the liquid, it is necessary to coat the outer surface of the stator core, for example, the entire outer surface, with a heat conductive insulating layer. Typically, the insulating layer may be a plastic, such as PPSU thermoplastic. A portion of the thermally conductive and insulating layer forms the rotor assembly support 12. Through the isolation effect of the heat conduction insulating layer, the stator core, the stator winding, the rotor 8 and the bearing can be isolated from pumped liquid, so that the use safety of the motor pump is effectively ensured. In addition, because the heat conduction effect of the heat conduction insulating layer is better than that of air, the heat transfer effect is good, and the heat dissipation effect is better when the heat conduction insulating layer directly contacts the flowing updated pumping liquid, so that the heat dissipation of the motor is facilitated, and the service life of the motor pump is prolonged. In addition, for the washing pump used in the dishwasher, the pumping medium outlet 3 of the pump housing 1 is connected to a heating pipe, and the preheated cleaning water needs to consume less heating power to be heated to a predetermined temperature, for example, 60 ℃. Therefore, the energy-saving effect can be achieved.
The motor pump provided by the embodiment of the invention can be applied to household appliances such as fans, dish washers, automobile electronic pumps and the like and the automobile industry.
In view of this, a second aspect of embodiments of the present invention provides a dishwasher including a motor pump for driving a washing liquid to be sprayed from a spray arm to wash dishes. Wherein, the motor pump is the motor pump according to the first aspect of the embodiment of the present invention. The dish washer provided by the embodiment of the invention has the advantages similar to the effects of the motor pump, and is not repeated here.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. The technical solution of the invention can be subjected to a plurality of simple variants within the scope of the technical idea of the invention. Including the various specific features being combined in any suitable manner. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.

Claims (9)

1. An electric motor pump comprising an electric motor and a pump body, characterized in that the pump body comprises a pump housing (1), the pump housing (1) being mounted on the electric motor and facing each other with a stator assembly (4) of the electric motor and forming an axial space with the stator assembly (4) of the electric motor for conveying a pumping medium, so as to be able to bring the pumping medium into contact with the stator assembly (4) of the electric motor;
the motor comprises a stator assembly (4), a rotor assembly coaxially arranged within the stator assembly (4), and a motor end cover (11) for supporting the stator assembly (4) and the rotor assembly;
one end of the stator assembly (4) facing the pump housing (1) is formed with a rotor assembly support (12), one end of the stator assembly (4) remote from the pump housing (1) and an end of the motor end cover (11) are opposite to each other, and the rotor assembly is rotatably supported on the end of the motor end cover (11) and the rotor assembly support (12).
2. The electric motor pump according to claim 1, characterized in that the motor end cap (11) has a cylindrical cavity formed therein such that a portion of the stator assembly (4) in the axial direction is accommodated in the cylindrical cavity; the other part of the stator assembly (4) in the axial direction is accommodated in the pump housing (1).
3. The motor pump according to claim 2, characterized in that a first bearing (7) is mounted inside an end portion of the motor end cover (11), a second bearing is mounted inside the rotor assembly support portion (12), and the rotor assembly is rotatably supported on the end portion of the motor end cover (11) and the rotor assembly support portion (12) through the first bearing (7) and the second bearing.
4. A motor pump according to claim 3, wherein the rotor assembly comprises: a rotor shaft (5) and a rotor (8) coaxially fixed outside the rotor shaft (5), the rotor shaft (5) extending axially through the first bearing (7) and the second bearing to an end within an axial space between the pump housing (1) and the stator assembly (4).
5. The electric motor pump of claim 4, further comprising:
a first vibration damping ring (6), the first vibration damping ring (6) being arranged between the first bearing (7) and the motor end cover (11) for suppressing transmission of vibrations between the first bearing (7) and the motor end cover (11);
a second vibration damping ring (9) provided between the second bearing and the rotor assembly support (12) for suppressing transmission of vibrations between the second bearing and the rotor assembly support (12);
and a sealing plug (2), the sealing plug (2) being arranged between the rotor assembly support (12) and the rotor shaft (5) and being located outside the second bearing for preventing the pumped medium from entering the stator windings and rotor (8) of the stator assembly (4).
6. The electric motor pump according to claim 2, characterized in that a cylindrical cavity for accommodating the other part of the stator assembly (4) in the axial direction is formed in the pump housing (1), and that a pumping medium inlet (10) and a pumping medium outlet (3) are provided in the pump housing (1).
7. The electric motor pump according to any one of claims 1-6, characterized in that the electric motor pump is a liquid pump, the stator assembly (4) comprising a stator core and a stator winding wound around the stator core, and a thermally conductive insulating layer wrapping over an outer surface of the stator core to isolate the stator core and the stator winding, the thermally conductive insulating layer also serving to isolate the stator core and the stator winding from the pumping medium.
8. The electric motor pump of any one of claims 1-6, wherein the electric motor pump is a gas pump; the stator assembly (4) comprises a stator core, a stator winding wound on the stator core and an insulating layer arranged between the stator core and the stator winding and used for isolating the stator core and the stator winding; the gas pump is capable of directly contacting the stator core when pumping gas.
9. A dishwasher comprising a motor pump, characterized in that the motor pump is according to any one of claims 1-8.
CN201710637233.6A 2017-07-31 2017-07-31 Motor pump and dish washer Active CN107313948B (en)

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Application Number Priority Date Filing Date Title
CN201710637233.6A CN107313948B (en) 2017-07-31 2017-07-31 Motor pump and dish washer

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Application Number Priority Date Filing Date Title
CN201710637233.6A CN107313948B (en) 2017-07-31 2017-07-31 Motor pump and dish washer

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CN107313948A CN107313948A (en) 2017-11-03
CN107313948B true CN107313948B (en) 2023-07-18

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CN114060288B (en) * 2020-08-07 2023-09-08 汉宇集团股份有限公司 Electric pump for electric automobile power supply thermal management system
CN114189084A (en) * 2020-09-15 2022-03-15 佛山市威灵洗涤电机制造有限公司 Motor and washing machine
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