CN114837935A - Compact electric liquid pump - Google Patents
Compact electric liquid pump Download PDFInfo
- Publication number
- CN114837935A CN114837935A CN202210383975.1A CN202210383975A CN114837935A CN 114837935 A CN114837935 A CN 114837935A CN 202210383975 A CN202210383975 A CN 202210383975A CN 114837935 A CN114837935 A CN 114837935A
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- Prior art keywords
- pump
- rotor
- motor
- oil
- electric liquid
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- 239000007788 liquid Substances 0.000 title claims abstract description 23
- 239000003921 oil Substances 0.000 claims description 74
- 239000010705 motor oil Substances 0.000 claims description 13
- 238000012546 transfer Methods 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 description 11
- 238000007789 sealing Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Images
Classifications
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- 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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
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- 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
- F04C15/0096—Heating; Cooling
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- 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
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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- 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
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention discloses a compact electric liquid pump, which belongs to the field of hydraulic system equipment, and is characterized in that a containing cavity is formed on a rotor by optimally designing the structure of a motor rotor; and then, the hydraulic pump is creatively coaxially arranged in the accommodating cavity, so that a rotating shaft of the hydraulic pump can synchronously rotate with the motor rotor, the motor unit and the hydraulic pump unit are compactly assembled, and the hydraulic system is further arranged. The compact electric liquid pump has the advantages of compact structure and convenience in assembly, can realize the integrated arrangement of the motor unit and the hydraulic pump unit, does not need to additionally arrange a corresponding oil duct, reduces the additional volume caused by the design of redundant oil ducts, greatly reduces the volume size of the hydraulic system in the assembly design, improves the cooling effect of the motor in the use process while ensuring the normal work of the hydraulic system, and has better practical value and application prospect.
Description
Technical Field
The invention belongs to the field of hydraulic system equipment, and particularly relates to a compact electric liquid pump.
Background
In industrial production and daily life, hydraulic systems are widely used. Generally, a hydraulic system mainly depends on a motor to drive a hydraulic pump to provide a power oil source, and the corresponding hydraulic transmission operation process is completed by changing the oil pressure in the hydraulic system.
For a traditional hydraulic system, a distributed structure of a motor, a coupler and a hydraulic pump is usually adopted in the structural layout of the hydraulic system, and although the combined design can meet the requirements of practical application to a certain extent, the problems of large vibration noise, low power density, poor maintainability and the like exist, so that the use of the hydraulic system is limited to a certain extent. Moreover, for a traditional hydraulic system or an existing improvement scheme in the prior art, the problems of large volume, more sealing elements, high sealing control difficulty and poor reliability often exist in the setting process of the traditional hydraulic system or the existing improvement scheme in the prior art, so that the requirement of practical application cannot be fully met by the existing hydraulic system.
Disclosure of Invention
In view of one or more of the above drawbacks or needs for improvement in the prior art, the present invention provides a compact electric hydraulic pump, which can achieve compact assembly of an electric motor and a hydraulic pump, greatly reduce the volume of a hydraulic system after installation, and improve the convenience and reliability of the hydraulic system.
In order to achieve the above object, the present invention provides a compact electric liquid pump, comprising a motor unit and a hydraulic pump unit; the motor unit comprises a motor shell in a cylindrical structure, two ends of the motor shell are respectively sealed by a first end cover and a second end cover, and a stator component and a rotor are correspondingly arranged in the motor shell;
the rotor is of a cylindrical structure with an opening at one end and a closed end, an accommodating cavity is formed in the middle of the rotor, two ends of the rotor are assembled on the inner side end faces of two end covers through bearings respectively, and a plurality of oil conveying holes communicated with the inside and the outside of the accommodating cavity are formed in the closed end of the rotor;
the hydraulic pump unit is coaxially arranged in the accommodating cavity, one end of the hydraulic pump unit, which is provided with a pump oil outlet, is fixedly connected to the second end cover, and is communicated with the accommodating cavity through a pump oil inlet; meanwhile, a pump rotating shaft of the hydraulic pump unit is coaxially connected with the closed end of the rotor, so that the pump rotating shaft and the rotor can synchronously rotate;
correspondingly, a motor oil outlet communicated with the oil outlet of the pump is formed in the second end cover, and a motor oil inlet communicated with the inner side of the motor shell is formed in the motor shell.
As a further improvement of the invention, the first end cover is also provided with an encoder, and a rotating shaft corresponding to the encoder is arranged on the first end cover; one end of the rotating shaft is connected to the encoder, and the other end of the rotating shaft penetrates through the first end cover and is coaxially connected with the pump rotating shaft.
As a further improvement of the present invention, an oil seal is disposed on an inner end surface of the first end cover corresponding to the rotating shaft.
As a further improvement of the invention, the middle part of the closed end of the rotor is provided with a middle shaft hole, and one end of the pump rotating shaft is coaxially assembled in the middle shaft hole.
As a further improvement of the invention, the oil inlet of the motor is arranged on the second end cover, and the oil inlet of the motor is opposite to and communicated with the cavity outside the rotor.
As a further improvement of the invention, a plurality of oil transmission grooves are formed on the end surface of the inner side of the first end cover.
As a further improvement of the invention, the pump oil inlet is arranged on one side of the hydraulic pump unit, which is opposite to the closed end of the rotor, and a certain distance is arranged between the pump oil inlet and the closed end of the rotor.
As a further improvement of the invention, the oil delivery holes are arranged at intervals and distributed in a fan blade manner on the closed end of the rotor.
As a further development of the invention, the hydraulic pump unit is a gear pump, a plunger pump or a vane pump.
As a further development of the invention, the hydraulic pump unit is an internal gear pump or an external gear pump.
The above-described improved technical features may be combined with each other as long as they do not conflict with each other.
Generally, compared with the prior art, the technical scheme conceived by the invention has the following beneficial effects:
(1) according to the compact electric liquid pump, the structure of the motor rotor is preferably designed, so that the rotor is provided with the accommodating cavity; the hydraulic pump is creatively and coaxially arranged in the accommodating cavity, so that a rotating shaft of the hydraulic pump can synchronously rotate with the motor rotor, the motor unit and the hydraulic pump unit are compactly assembled, the hydraulic system is further arranged, the assembly difficulty of the hydraulic system is greatly reduced, and the assembly volume of the hydraulic system is reduced; and because the rotor and the stator module of the motor are soaked in the oil, the cooling effect of each structure can be greatly improved, the stable operation of the equipment is ensured, and the vibration noise in the operation process of the equipment is fully reduced.
(2) The compact electric liquid pump has the advantages of compact structure and convenience in assembly, can realize the integrated arrangement of the motor unit and the hydraulic pump unit, does not need to additionally arrange a corresponding oil duct, reduces the additional volume caused by the design of redundant oil ducts, greatly reduces the volume size of the hydraulic system in the assembly design, improves the cooling effect of the motor in the use process while ensuring the normal work of the hydraulic system, and has better practical value and application prospect.
Drawings
FIG. 1 is a cross-sectional view of a compact electro-hydraulic pump in an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a rotor structure of a compact electrohydraulic pump according to an embodiment of the present invention;
FIG. 3 is a schematic end view of a rotor structure of a compact electric liquid pump according to an embodiment of the present invention;
FIGS. 4 to 7 are schematic structural diagrams of a hydraulic pump unit of the compact electric liquid pump according to an embodiment of the present invention;
in all the figures, the same reference numerals denote the same features, in particular:
1. a motor unit; 101. a motor housing; 102. a first end cap; 1021. an oil delivery groove; 1022. sealing oil liquid; 103. a second end cap; 104. a stator; 105. a coil winding; 106. a rotor; 1061. an accommodating cavity; 1062. an oil transfer hole; 1063. a middle shaft hole; 1064. a permanent magnet; 107. an oil inlet of the motor; 108. an oil outlet of the motor; 109. a bearing;
2. a hydraulic pump unit; 201. a pump housing; 202. a third end cap; 203. a fourth end cap; 204. a pump shaft; 205. an oil inlet of the pump; 206. an oil outlet of the pump;
3. an encoder.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Example (b):
referring to fig. 1 to 7, the compact electric liquid pump in the preferred embodiment of the present invention includes an electric motor unit 1 and a hydraulic pump unit 2 which are compactly coupled to each other. The hydraulic pump unit 2 is correspondingly arranged in the shell of the motor unit 1, the hydraulic pump unit and the motor unit are combined into a compact structure, the assembly volume of a hydraulic system is greatly reduced, the arrangement of an additional flow passage is reduced, and the sealing structure of equipment is greatly simplified.
Specifically, in the preferred embodiment, the motor unit 1, as shown in fig. 1, includes a housing formed with a sealed cavity, and a stator assembly and a rotor assembly are disposed circumferentially within the sealed cavity.
The housing in the preferred embodiment includes a motor housing 101 having a cylindrical structure and two open ends, and two ends of the motor housing 101 are respectively provided with an end cover, i.e., a first end cover 102 and a second end cover 103, so that a sealed cavity is formed inside the motor housing 101 by using the sealing arrangement of the two end covers.
Meanwhile, as shown in fig. 1, the stator assembly in the preferred embodiment includes a stator 104 disposed in a circumferential direction and a coil winding 105 disposed corresponding to the stator 104; correspondingly, the rotor assembly is coaxially arranged at the inner side of the stator assembly, and comprises a rotor 106 in a circular cylindrical structure, one end of the rotor 106 is closed, the other end of the rotor 106 is opened, and an accommodating cavity 1061 is formed inside the rotor and correspondingly accommodates and matches the hydraulic pump unit 2.
Further, a center shaft hole 1063 is coaxially formed in the middle of the closed end of the rotor 106 and is used for matching and connecting the pump rotating shaft 204 on the hydraulic pump unit 2, so that the pump rotating shaft 204 is coaxially arranged with the rotor 106 and can rotate synchronously therewith. In a preferred embodiment, the central shaft hole 1063 is a pin hole, which can be engaged and locked with a protruding pin on the outer circumference of the end of the pump shaft 204, so as to ensure that the position between the pump shaft 204 and the rotor 106 is relatively fixed, and ensure the reliability of the transmission process.
It can be understood that, in actual installation, a protrusion structure may be disposed on an inner wall surface of the central shaft hole 1063, and a receiving groove is correspondingly formed on an outer periphery of an end portion of the pump rotating shaft 204, so as to achieve accurate assembly between the two. Of course, in addition to the above-mentioned forms, other forms of connection between the closed end of the rotor 106 and the pump shaft 204 may be adopted in the preferred embodiment, as long as the fixed assembly between the two can be realized. For example, in another preferred embodiment, the pump shaft 204 is directly integrally formed with the closed end of the rotor 106 to form a unitary structure.
More specifically, at least one oil delivery hole 1062 communicating with the accommodating chamber 1061 is provided at the closed end of the rotor 106 for communicating the inside and the outside of the rotor 106, and oil for the outside of the rotor 106 enters the hydraulic pump accommodating chamber 1061 through the oil delivery hole 1062 to supply oil for the operation of the hydraulic pump unit 2. In the preferred embodiment, the oil delivery holes 1062 are at least two spaced apart, such as a plurality of fan blades (4 in the figure) as shown in fig. 3, and the plurality of oil delivery holes 1062 are preferably arranged symmetrically about the axis of the rotor 106.
Further, in order to ensure that the oil can accurately enter the hydraulic pump unit 2 after entering the accommodating chamber 1061, a certain interval is reserved between the end surface of the hydraulic pump unit 2 and the inner side wall surface of the sealed end of the rotor 106, as shown in fig. 1, so that the oil entering the rotor 106 can be accurately accommodated in the accommodating chamber 1061. Meanwhile, the hydraulic pump unit 2 is coaxially disposed with the rotor 106, as shown in fig. 1, so that when the rotor 106 rotates, the pump rotating shaft 204 of the hydraulic pump unit 2 can move synchronously, thereby completing the pumping process of the oil.
In actual installation, the permanent magnet 1064 is circumferentially disposed on the outer periphery of the rotor 106, and a certain gap is formed between the permanent magnet 1064 and the stator assembly to ensure accurate rotation of the rotor 106. Meanwhile, both axial ends of the rotor 106 are respectively fitted on the inner side wall surfaces of the first and second end caps 102 and 103 through bearings 109, as shown in fig. 1. In the preferred embodiment, the rotor 106 is mated, preferably (approximately) sealed rotationally, to the end covers such that the interior chamber of the rotor 106 communicates with the space outside the rotor 106 primarily through the oil transfer holes 1062. Correspondingly, a plurality of oil delivery grooves 1021 are formed in the end face of the inner side of the first end cover 102, which corresponds to the oil delivery hole 1062 in the rotor 106, so that the accommodation cavity 1061 is communicated with the cavity outside the rotor 106, and reliable oil delivery is ensured.
As shown in fig. 4 to 7, the hydraulic pump unit 2 in the preferred embodiment includes a pump housing 201, and a third end cover 202 and a fourth end cover 203 respectively disposed at two ends of the pump housing 201, and oil ports, i.e., a pump oil outlet 206 and a pump oil inlet 205, are respectively opened at the two end covers, as shown in fig. 4 to 7, so that oil can enter the hydraulic pump unit 2 from the pump oil inlet 205 and be output from the pump oil outlet 206 after being pressurized in the hydraulic pump. In actual installation, the hydraulic pump unit 2 is preferably a gear pump (not limited to an internal gear pump and an external gear pump), and of course, besides the above-mentioned hydraulic pump, it may also be a vane pump or a plunger pump, which is not described herein. In addition, the pump oil outlet 206 and the pump oil inlet 205 in the preferred embodiment are further preferably half-moon-shaped through holes which are arranged in a staggered manner from each other, as shown in fig. 5 and 7.
In actual setting, the pump housing 201 and the end covers on both sides of the hydraulic pump unit 2 are fixed in the motor housing 101, that is, the relative positions of the two oil ports on the hydraulic pump unit 2 and the motor housing 101 are not changed, and only the pump rotating shaft 204 can synchronously rotate according to the rotor 106, so as to rotate relative to the pump housing 201.
Further, oil ports, namely, the motor oil inlet 107 and the motor oil outlet 108, are simultaneously opened on an end cover of the motor unit 1 on a side close to the pump oil outlet 206 on the hydraulic pump unit 2. In the preferred embodiment, the oil port opens into the second end cap 103, as shown in FIG. 1.
In more detail, the motor oil inlet 107 in the preferred embodiment is communicated with the cavity outside the rotor 106, so that after oil enters the motor housing 101 from the motor oil inlet 107, the oil can enter a clearance space between the rotor 106 and the stator assembly, i.e., the stator assembly and the rotor 106 are soaked in the oil. So set up, also be favorable to the cooling of stator module and rotor 106, the cooling effect is better. Meanwhile, the motor oil outlet 108 is opposite to and communicated with the pump oil outlet 206 formed in the end cover on one side of the hydraulic pump unit 2, so that the oil pressurized and output from the hydraulic pump unit 2 can be conveyed to the actuator through the motor oil outlet 108.
Preferably, an encoder 3 is disposed on an end cover (i.e., the first end cover 102 in fig. 1) on a side facing away from the motor oil outlet 108, and is coaxially matched with the rotor 106 by a rotating shaft. In actual implementation, the shaft is an extension of the pump shaft 204, as shown in FIG. 1. Correspondingly, an oil seal 1022 is arranged at the matching position of the rotating shaft and the first end cover 102, so that oil leakage from the assembling position of the rotating shaft is avoided, and the operation reliability of the whole mechanism is ensured.
It can be seen that, in the operation of the electrohydraulic pump in the preferred embodiment, the oil entering the motor housing 101 from the oil inlet 107 enters the motor housing 101 from one side of the first end cover 102, and enters the accommodating cavity 1061 through the oil delivery groove 1021 and the oil delivery hole 1062 in sequence; after that, the oil in the accommodating chamber 1061 enters the hydraulic pump unit 2 through the pump oil inlet 205, is pressurized by the hydraulic pump unit 2, and is sequentially output from the pump oil outlet 206 and the motor oil outlet 108, so as to complete corresponding driving of corresponding actuators.
The compact electric liquid pump has the advantages of compact structure and convenience in assembly, can realize the integrated arrangement of the motor unit and the hydraulic pump unit, does not need to additionally arrange a corresponding oil duct, reduces the additional volume caused by the design of redundant oil ducts, greatly reduces the volume size of the hydraulic system in the assembly design, improves the cooling effect of the motor in the use process while ensuring the normal work of the hydraulic system, and has better practical value and application prospect.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A compact electric liquid pump comprises a motor unit and a hydraulic pump unit; the motor unit comprises a motor shell in a cylindrical structure, two ends of the motor shell are respectively sealed by a first end cover and a second end cover, and a stator component and a rotor are correspondingly arranged in the motor shell; it is characterized in that the preparation method is characterized in that,
the rotor is of a cylindrical structure with an opening at one end and a closed end, an accommodating cavity is formed in the middle of the rotor, two ends of the rotor are assembled on the inner side end faces of two end covers through bearings respectively, and a plurality of oil conveying holes communicated with the inside and the outside of the accommodating cavity are formed in the closed end of the rotor;
the hydraulic pump unit is coaxially arranged in the accommodating cavity, one end of the hydraulic pump unit, which is provided with a pump oil outlet, is fixedly connected to the second end cover, and is communicated with the accommodating cavity through a pump oil inlet; meanwhile, a pump rotating shaft of the hydraulic pump unit is coaxially connected with the closed end of the rotor, so that the pump rotating shaft and the rotor can synchronously rotate;
correspondingly, a motor oil outlet communicated with the oil outlet of the pump is formed in the second end cover, and a motor oil inlet communicated with the inner side of the motor shell is formed in the motor shell.
2. The compact electric liquid pump according to claim 1, wherein the first end cap is further provided with an encoder, and a rotating shaft is provided corresponding to the encoder; one end of the rotating shaft is connected to the encoder, and the other end of the rotating shaft penetrates through the first end cover and is coaxially connected with the pump rotating shaft.
3. The compact electric liquid pump according to claim 2, wherein an oil seal is provided on an inner end face of the first end cap corresponding to the rotary shaft.
4. The compact electric liquid pump according to any one of claims 1 to 3, wherein a central shaft hole is formed in the middle of the closed end of the rotor, and one end of the pump rotating shaft is coaxially fitted in the central shaft hole.
5. The compact electric liquid pump according to any one of claims 1 to 4, wherein the motor oil inlet is opened in the second end cap and faces a chamber communicating with an outer side of the rotor.
6. The compact electric liquid pump according to claim 5, wherein the first end cap has a plurality of oil grooves formed on an inner end surface thereof.
7. The compact electric liquid pump according to any one of claims 1 to 6, wherein the pump oil inlet is opened at a side of the hydraulic pump unit facing the closed end of the rotor, and the pump oil inlet is spaced from the closed end of the rotor by a certain distance.
8. The compact electric liquid pump according to any one of claims 1 to 7, wherein the oil transfer holes are formed at intervals, and the oil transfer holes are distributed in a fan-blade manner on the closed end of the rotor.
9. The compact electric liquid pump according to any one of claims 1 to 8, wherein the hydraulic pump unit is a gear pump, a plunger pump or a vane pump.
10. The compact electric liquid pump according to any one of claims 1 to 9, wherein the hydraulic pump unit is an internal gear pump or an external gear pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210383975.1A CN114837935A (en) | 2022-04-13 | 2022-04-13 | Compact electric liquid pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210383975.1A CN114837935A (en) | 2022-04-13 | 2022-04-13 | Compact electric liquid pump |
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| Publication Number | Publication Date |
|---|---|
| CN114837935A true CN114837935A (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210383975.1A Pending CN114837935A (en) | 2022-04-13 | 2022-04-13 | Compact electric liquid pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335937A (en) * | 2023-02-28 | 2023-06-27 | 中国人民解放军海军工程大学 | Coaxial integrated electro-hydraulic pump |
| CN117691804A (en) * | 2024-02-04 | 2024-03-12 | 博格华纳汽车零部件（武汉）有限公司 | Power generation device and new energy automobile |
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| CN113250950A (en) * | 2021-05-24 | 2021-08-13 | 中国能源建设集团山西省电力勘测设计院有限公司 | Wet rotor internal meshing direct-drive gear oil pump and assembly method thereof |
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| CN214660668U (en) * | 2020-12-31 | 2021-11-09 | 钟彪 | Large-traffic compact electricity liquid all-in-one |
| CN114033670A (en) * | 2021-11-30 | 2022-02-11 | 河北佛斯特液压技术股份有限公司 | Self-driven motor pump |
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| CN116335937B (en) * | 2023-02-28 | 2024-03-15 | 中国人民解放军海军工程大学 | Coaxial integrated electro-hydraulic pump |
| CN117691804A (en) * | 2024-02-04 | 2024-03-12 | 博格华纳汽车零部件（武汉）有限公司 | Power generation device and new energy automobile |
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