WO2023236040A1

WO2023236040A1 - Small-power dual-canned motor pump assembly

Info

Publication number: WO2023236040A1
Application number: PCT/CN2022/097389
Authority: WO
Inventors: 刘翁帆
Original assignee: 汉宇集团股份有限公司
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2023-12-14
Also published as: CN117999415A

Abstract

A small-power dual-canned motor pump assembly, comprising two small-power canned motor pumps, namely a first canned motor pump and a second canned motor pump, that are integrally assembled along the same axis. Motors of the two small-power canned motor pumps are close to each other at one end thereof, stator cans are subjected to integrated injection molding, and impellers of respective pumps are driven by the other ends of the motors. According to the small-power dual-canned motor pump assembly, motors of the two small-power canned motor pumps are close to each other at one end, stator cans are subjected to integrated injection molding, and the respective motors drive impellers located at two ends of the stator can to rotate. The designed small-power dual-canned motor pump assembly is compact in overall structure and easy to install and produce, and has good shielding and environment protection effects.

Description

A low-power double-shield electric pump combination

Technical field

The invention relates to a canned electric pump, in particular to a low-power double canned electric pump combination, whose IPC classification number is F04D13/06.

Background technique

There are existing dual-motor centrifugal pumps, as shown in the patent publication number CN214330911U. This centrifugal water pump connects two opposite pump structures in series through an intermediate section. However, how to integrate the two motors to drive one pump structure together to meet the needs of each axis? There is currently no good solution for draining water at different speeds at one end.

Commonly known common sense and terminology can be found in the 2nd edition of "Mechanical Engineering Handbook" and "Electrical Engineering Handbook" of Mechanical Industry Press in 1997, the 1st edition of "Pump Theory and Technology" in 2014 of Mechanical Industry Press, and the national standard GB/T 7021 " Centrifugal pump terminology.

Contents of the invention

In order to solve the above technical problems, the present invention provides a low-power double-shield electric pump combination with compact structure and simple installation.

The technical solution adopted by the present invention is:

A low-power double-canned electric pump combination, including two low-power canned electric pumps assembled together along the same axis - a first canned electric pump and a second canned electric pump, and one end of the motors of the two low-power canned electric pumps They are close together and the stator shielding sleeve is injection molded into one body, and the other end drives the impeller of the respective pump.

In the low-power double-shielded electric pump combination of the present invention, one end of the motors of the two low-power shielded electric pumps is brought close together and the stator shielding sleeves are injection molded into one body. Their respective motors drive the impellers located at both ends of the stator shielding sleeves to rotate. The low-power double-shielded electric pump combination designed above has a compact overall structure, simple installation, easy production, and has good shielding and environmental protection effects.

Further, one end of the motors of the two low-power canned electric pumps is close to each other and the stator shielding sleeves are injection molded into one body. Specifically, the motor of the first canned electric pump includes a first rotor and a first stator plastic sealing part, and the motor of the second canned electric pump includes a first rotor and a first stator plastic sealing part. It includes the second rotor and the second stator plastic sealing part; the stator shielding sleeve is injection molded on the fixedly connected first stator plastic sealing part and the second stator plastic sealing part and has a hollow inner cavity, and the first rotor is installed in one part of the inner cavity. The second rotor is installed on the other side of the inner cavity and driven by the rotating magnetic field generated by the second stator plastic part.

Furthermore, the first stator plastic packaging part includes a first stator part and a first plastic shell injection molded on the first stator part, and the second stator plastic packaging part includes a second stator part and a first plastic shell injection molded on the second stator part. 2Plastic case.

Furthermore, the first stator plastic sealing part and the second stator plastic sealing part are axially inserted and connected.

Furthermore, the axial plug-in connection between the first stator plastic part and the second stator plastic part is specifically: the first plastic shell has an axially protruding first boss, and the second plastic shell has an axially concave second boss. The two grooves are inserted through the first boss and the second groove; or the first plastic shell is provided with a concave first groove in the axial direction, and the second plastic shell is provided with an axially convex second boss, The two are plugged in through the first groove and the second boss.

Furthermore, the main body of the stator shielding sleeve is a cylindrical body, which includes an annular outer shell part, an inner shell part located within the outer shell part, and a connecting part connecting the outer shell part and the inner shell part. The first stator plastic sealing part and the first stator plastic sealing part are 2. The plastic sealing part of the stator is located in the space surrounded by the outer shell part, the inner shell part and the connecting part. The hollow space of the inner shell part forms an inner cavity. The inner wall of the inner cavity has bumps protruding inward. The first rotor and the second rotor respectively located on both axial sides of the bump.

Further, the first plastic shell is provided with a first shaft hole in the axial direction, and the second plastic shell is provided with a second shaft hole located on the other side of the axis in the fixed connection state.

Furthermore, the low-power double-shielded electric pump assembly also includes a plug cover with a cylindrical main body, and the connecting part is provided with a first axial hole facing the first axial hole and a second axial hole facing the second axial hole. The plug cover is fixedly arranged on the first axial hole and the second axial hole.

Further, the first stator part includes a first iron core and a first insert electrically connected to the first winding, and the first winding is sealed in the first plastic shell; the second stator part includes a second iron core and a second winding. The electrically connected second blade and the second winding are sealed in the second plastic shell; the pins of the first blade and the second blade extend radially through the shell part of the stator shielding sleeve.

Furthermore, the low-power double-shielded electric pump assembly also includes a circuit board and a side cover. The stator shielding sleeve also includes a peripheral portion that protrudes outward to form a ring-column shape on the outer peripheral wall of the housing portion. The circuit board is arranged on the peripheral portion. In the installation cavity enclosed by the side cover, the pins of the first plug-in blade and the second plug-in blade are electrically connected to the circuit board.

Further, the low-power double-shielded electric pump combination also includes a first pin that electrically connects the circuit board and the first iron core, and a second pin that electrically connects the circuit board and the second iron core.

Furthermore, the low-power double-shielded electric pump combination also includes a first spring and a second spring, and the stator shield sleeve is provided with radial through holes at locations close to the outer cylinder of the first iron core and the outer cylinder of the second iron core. The first spring and the second spring are respectively installed in the two radial through holes, and the first spring electrically conducts the first iron core and the first pin, and the second spring electrically conducts the second iron core and the second pin.

Further, at least one side of the axial direction of the bump is set with a sub-shielding sleeve boss, and the stator shielding sleeve boss is provided with a shaft hole.

Further, the low-power double canned electric pump assembly also includes a first rotating shaft fixedly installed on the shaft hole, a first impeller part located at one axial end and a second impeller part located at the other axial end; the first rotor includes a 1. Magnetic core, 1st bearing and 1st impeller part. The 1st impeller part includes a 1st plastic connecting part that fixedly connects the 1st magnetic core and the 1st bearing and a 1st impeller part located at one axial end of the 1st plastic connecting part. , the first rotor is rotatably installed on the first rotating shaft; and/or it also includes a second rotating shaft fixedly installed on the shaft hole, the second rotor includes a second magnetic core, a second bearing and a second impeller part, the second The impeller part includes a second plastic connecting part that fixedly connects the second magnetic core and the second bearing and a second impeller part located at one axial end of the second plastic connecting part. The second rotor is rotatably mounted on the second rotating shaft.

Further, the impeller includes a first impeller part located on one side of the axial direction and a second impeller part located on the other side of the axial direction; the first rotor includes a first magnetic core, a first sleeve, a first rotating shaft, and is fixed on the first The first impeller part at one end of the rotating shaft and the first rotor connecting part that fixedly connects the first magnetic core and the first sleeve, the first rotating shaft and the first sleeve are fixedly connected; and/or the second rotor includes a second magnetic core, The second shaft sleeve, the second rotating shaft, the second impeller portion fixed to one end of the second rotating shaft, the second rotor connecting portion fixedly connecting the second magnetic core and the second shaft sleeve, the second rotating shaft and the second shaft sleeve being fixedly connected. .

Furthermore, the low-power double-shield electric pump combination also includes an end cover provided on the stator shield sleeve on the side where the second rotor is installed and an impeller bearing provided on the end cover. The first rotating shaft or the second rotating shaft passes through the impeller. The inner ring of the bearing.

For better understanding and implementation, the present invention will be described in detail below with reference to the accompanying drawings.

Description of the drawings

Figure 1 is a schematic three-dimensional structural diagram of the low-power double-shielded electric pump combination of the present invention;

Figure 2 is a cross-sectional view of the first embodiment of the low-power double-shield electric pump combination of the present invention;

Figure 3 is a schematic three-dimensional structural diagram of the first stator plastic sealing part of the present invention;

Figure 4 is a schematic three-dimensional structural diagram of the second stator plastic sealing part of the present invention;

Figure 5 is a cross-sectional view of the first stator plastic part and the second stator plastic part after assembly;

Figure 6 is a partial enlarged structural diagram of A in Figure 5;

Figure 7 is a cross-sectional view of the stator shielding sleeve of the present invention;

Figure 8 is a schematic three-dimensional structural diagram of the stator shielding sleeve of the present invention;

Figure 9 is a schematic three-dimensional structural diagram of the first embodiment of the first rotor of the present invention;

Figure 10 is a cross-sectional view of the first embodiment of the first rotor of the present invention;

Figure 11 is a cross-sectional view of the second embodiment of the low-power double-shield electric pump combination of the present invention;

Figure 12 is a schematic three-dimensional structural diagram of the second embodiment of the first rotor of the present invention;

Figure 13 is a cross-sectional view of the second embodiment of the first rotor of the present invention;

Among them, 10-stator cavity, 20-inner cavity, 30-installation cavity, 100-stator shielding sleeve, 110-shell part, 120-inner shell part, 130-connection part, 131-first axial hole, 132-th 2 axial hole, 140-bump, 141-stator shielding sleeve boss, 142-axial hole, 150-surrounding part, 161-first stator shielding sleeve through hole, 162-second stator shielding sleeve through hole, 200 -1st rotor, 210-1st magnetic core, 220-1st bearing, 230-1st impeller part, 231-1st plastic connection part, 232-1st impeller, 300-2nd rotor, 310-2nd magnet Core, 320-2nd bearing, 330-2nd impeller part, 331-2nd plastic connecting part, 332-2nd impeller, 300′-2nd rotor, 310′-2nd magnetic core, 320′-2nd shaft sleeve, 330′-2nd impeller, 340′-2nd rotating shaft, 350′-2nd rotor connection part, 400-1st stator plastic sealing part, 410-1st stator part, 411-1st iron core, 412-1st stator part 1 winding, 413-1st insert, 414-1st coil bobbin, 415-1st insert pin, 420-1st plastic shell, 421-1st shaft hole, 422-1st boss, 500-1st 2 Stator plastic sealing part, 510-2nd stator part, 511-2nd iron core, 512-2nd winding, 513-2nd blade, 514-coil frame, 515-2nd blade pin, 520-2nd Plastic shell, 521-2nd shaft hole, 522-2nd groove, 600-plug cover, 610-1st pump cover, 620-2nd pump cover, 630-circuit board, 640-side cover, 650-end cover , 660-impeller bearing, 710-pin, 720-2nd pin, 730-1st spring, 740-2nd spring

Detailed ways

See Figures 1 and 2. The present invention provides a low-power double-canned electric pump combination, including a first canned electric pump and a second canned electric pump, which are two low-power canned electric pumps assembled together along the same axis. . In order to install the above two canned electric pumps more compactly into one body, one end of the motors of the first canned electric pump and the second canned electric pump is close together and the stator shielding sleeve 100 is injection molded into one body. The other end of the pump's motor drives the impeller of the respective pump.

As shown in Figure 2, one end of the motors of the first canned electric pump and the second canned electric pump are close together and the stator shielding sleeve 100 is injection molded into one body. Specifically, the motor of the first canned electric pump includes a first rotor 200 and a first stator plastic sealing part 400. , the motor of the second canned electric pump includes a second rotor 300 and a second stator plastic part 500 . The stator shielding sleeve 100 is made of a mold injection molding insert that fixedly connects the first stator plastic sealing part 400 and the second stator plastic sealing part 500, and is put into the mold and injection molded to form a cylindrical structure with a hollow inner cavity 20 and a first rotor. The second rotor 300 is installed on one side of the inner cavity 20 and driven by the rotating magnetic field generated by the first stator plastic part 400 . The second rotor 300 is installed on the other side of the inner cavity 20 and driven by the rotating magnetic field generated by the second stator plastic part 500 .

In the low-power double-shielded electric pump combination of the present invention, a stator shielding sleeve is formed by injection molding on the fixedly connected first stator plastic part and the second stator plastic part, and the first stator plastic part and the second stator plastic part each generate a rotating magnetic field to drive The first rotor and the second rotor located on both sides of the inner cavity in the axial direction rotate respectively. The low-power double-shielded electric pump combination designed above has a compact overall structure, simple installation, and easy production.

Referring to Figures 2 to 4, the first stator plastic part 400 includes a first stator part 410 and a first plastic shell 420 injection molded on the first stator part. The second stator plastic part 500 includes a second stator part 510 and a first plastic shell 420 injection molded on the first stator part. 2. The second plastic shell 520 on the stator part. Further, as shown in FIG. 5 , the first stator plastic sealing part 400 and the second stator plastic sealing part 500 are axially inserted and connected. This design facilitates the installation of the first stator part and the second stator part and improves production efficiency.

Referring to Figures 3 to 6, the first stator plastic part 400 and the second stator plastic part 500 are axially inserted and connected, specifically: the axially protruding first boss 422 of the first plastic case 420, the second plastic case 520 A concave second groove 522 is provided in the axial direction of the stator, and the first stator plastic part 400 and the second stator plastic part 500 are plug-connected through the first boss 422 and the second groove 522 . The above design is beneficial to the production and assembly of the first stator plastic part and the second stator plastic part; or the first plastic shell is provided with a concave first groove in the axial direction, and the second plastic shell is axially convex. The second boss, the first plastic sealing part of the stator and the second plastic sealing part of the stator are plug-connected through the first groove and the second boss. Of course, as other embodiments, the first stator plastic part and the second stator plastic part can be connected using buckles or other plug-in methods commonly used in mechanical engineering manuals.

Referring to Figures 2, 5 and 7, the stator shielding sleeve 100 includes an annular outer shell part 110, an inner shell part 120 located within the outer shell part, and a connecting part 130 connecting the outer shell part and the inner shell part. The first stator plastic sealing part 400 and the second stator plastic sealing part 500 are located in the space surrounded by the outer shell part, the inner shell part and the connecting part. The hollow space of the inner shell part 120 forms an inner cavity 20, and the inner wall surface of the inner cavity 20 faces toward The inner protruding bump 140, the first rotor 200 and the second rotor 300 are respectively located on both axial sides of the bump 140. This structure facilitates the production of the stator shielding sleeve and the installation of the first rotor 200 and the second rotor 300.

Referring to Figures 5 and 6, the first plastic case 420 is provided with a first shaft hole 421 in the axial direction, the second plastic case 520 is provided with a second shaft hole 521 in the axial direction, the first stator plastic part 400 and the second stator plastic part 500 In the fixed connection state, the first shaft hole 421 and the second shaft hole 521 are respectively located on both sides of the axis. During injection molding, the mold pins are inserted into the first axis hole 421 and the second axis hole 521 to position the mold for injection molding the stator shielding sleeve. The above design can simplify the structure of the mold for injection molding the stator shielding sleeve. Further, as shown in Figure 2, the low-power double-shielded electric pump assembly of the present invention also includes a plug cover 600 with a cylindrical main body. When the stator shielding sleeve 100 is injection molded, a first hole facing the first shaft hole 421 is formed on the connecting part 130. The plug cover 600 is fixedly mounted on the first axial hole 131 and the second axial hole 132 facing the second axial hole 521 . This structure prevents water from entering the stator cavity, reduces the risk of short-circuit burnout of the first stator plastic part and the second stator plastic part, and improves the working stability of the canned electric pump.

Referring to Figures 5 to 7, the first stator part 410 includes a first iron core 411, a first coil former 414 fixed on the first iron core 411, a first winding 412 wound on the first coil former 414, and a first coil former 414. 1. The first insert 413 electrically connected to the winding 412, and the first stator plastic part 400 is an insert molded with the first stator part 410. It is put into a mold and injection molded to form a first plastic shell fixed on the first stator part 410. 420, in which the first winding 412 is sealed in the first plastic shell 420; the second stator plastic part 500 includes a second iron core 511 and a second coil former 514 fixed on the second iron core 511 and wound around the second coil The second winding 512 on the frame 514, the second insert 513 electrically connected to the second winding 512, and the second stator plastic sealing part 500 are injection-molded inserts of the second stator part 510, which are put into the mold to form a fixed position. The second plastic shell 520 is on the second stator part 510, in which the second winding 512 is sealed in the second plastic shell 520. The first blade 413 includes a first blade body and a first blade pin 415 that is bent and connected to the blade body. The second blade 513 includes a second blade body and a first blade pin that is bent and connected to the second blade body. The second blade has pin 515. After the fixedly connected first stator plastic part 400 and the second stator plastic part 500 are injection molded to form the stator shielding sleeve 100, the first blade pins 415 and the second blade pins 515 radially pass through the shell part of the stator shielding sleeve 100 Extend outward. This design facilitates the connection between the first stator plastic part and the second stator plastic part and the external power supply or circuit board, and has high reliability. The sealing in the present invention means that after the first stator part and the second stator part are injection molded, the winding and the second winding are respectively formed into the first plastic shell and the second plastic shell that meet the protection level of the shell part and are IP54.

As shown in FIG. 7 , the stator shielding sleeve 100 further includes a circumferential edge portion 150 that protrudes outward from the outer peripheral wall of the housing portion 110 to form a ring-column shape. As shown in Figure 2, the low-power double-shielded electric pump assembly of the present invention also includes a circuit board 630 and a side cover 640 covering the surrounding part. The circuit board 630 is provided in the installation formed by the surrounding part 150 and the side cover 640. In the cavity 30 , the first blade pin 415 and the second blade pin 515 are electrically connected to the circuit board 630 . This structure uniformly installs the circuit boards that control the first rotor and the second rotor in the installation cavity of the stator shielding sleeve, which is beneficial to the integration of the circuit boards and the realization of automated welding and installation.

As shown in Figures 2 and 7, the low-power double-shielded electric pump combination of the present invention also includes a first pin 710 that electrically connects the circuit board 630 and the iron core 411, and a first pin 711 that electrically connects the circuit board 630 and the second iron core 411. 2 pin 720. This design can improve the stability of the grounding protection of the canned electric pump and the convenience of product assembly. The low-power double-shielded electric pump assembly of the present invention also includes a first spring 730 and a second spring 740. The shell part of the stator shielding sleeve 100 is provided with a first stator shielding sleeve through hole 161 for installing the first spring 730 and a first stator shielding sleeve through hole 161 for installing the first spring 730. The second stator shielding sleeve through hole 162 where the 2 spring 740 is installed. In the assembled state, the first spring 730 is installed in the through hole 161 of the first stator shielding sleeve, and its axial side is electrically connected to the iron core 411, and the other side is electrically connected to the pin 710; the second spring 740 is installed. In the second stator shield sleeve through hole 162, one axial side thereof is electrically connected to the second iron core 511, and the other side is electrically connected to the second pin 720. This design is easy to install, can reduce the risk of disconnection between the first and second pins and the iron core or the second iron core, and improves the stability of the electrical connection.

See Figure 2 and Figure 7. In order to facilitate the installation of the rotating shaft or the second rotating shaft, a sub-shielding sleeve boss 141 is set on one side or both sides of the axial direction of the bump 140, and a shaft hole is provided on the stator shielding sleeve boss 141. 142.

Example 1:

See Figure 2, Figure 9 and Figure 10. The low-power double-shielded electric pump of the present invention is combined into a structure with a fixed rotating shaft. It also includes a rotating shaft 240 fixedly installed on the shaft hole 142 on one side of the stator shielding sleeve boss 141 and an installation. The second rotating shaft 340 is on the shaft hole 142 on the other side of the stator shield sleeve boss 141. The impeller includes a first impeller part 230 located on one axial side and a second impeller part 330 located on the other axial side. The first rotor 200 includes a first magnetic core 210, a first bearing 220 and a first impeller part 230, where , the first impeller part 230 includes a first plastic connection part 231 that fixedly connects the first magnetic core 210 and the first bearing 220 and a first impeller 232 located at one axial end of the plastic connection part 221. The first rotor 200 is rotatably installed. On the rotating shaft 240; the second rotor 300 has substantially the same structure as the first rotor, including a second magnetic core 310, a second bearing 320 and a second impeller part 330. The second impeller part 330 includes the second magnetic core 310 and the second impeller part 330. 2. The bearing 320 is fixedly connected to the second plastic connecting part 331 and the second impeller located at one axial end of the second plastic connecting part 331. This structure facilitates the production and installation of the first rotor or the second rotor and improves the production efficiency of the canned electric pump. Of course, as other embodiments, one side of the low-power double-canned electric pump combination adopts the structure of the first rotor or the second rotor, and the other side adopts the structure of the first rotor in other ways.

Example 2:

Referring to Figures 11 to 13, the difference between this embodiment and Embodiment 1 is that the structure of the first rotor is different. The second rotating shaft and the second impeller of the second rotor of this embodiment have a structure that rotates simultaneously. The impeller of this embodiment includes an impeller part located on one axial side and a second impeller part 330' located on the other axial side. The second rotor 300' includes a second magnetic core 310', a second sleeve 320', 2 rotating shaft 340', a second impeller 330' fixed at one end of the second rotating shaft, and a second rotor connecting part 350' that fixedly connects the second magnetic core 310' and the second sleeve 320'. 2 shaft sleeves 320′ fixed connection. This structure facilitates disassembly, repair or replacement of the impeller. Of course, as other embodiments, the first rotor of the low-power double-canned electric pump combination can also adopt substantially the same structure as the second rotor in the second embodiment or the structure of the first rotor in the first embodiment.

As shown in Figure 11, the low-power double-shield electric pump assembly of this embodiment also includes an end cover 650 provided on the stator shield sleeve 100 on the side where the second rotor 300' is installed, and an impeller bearing 660 provided on the end cover. The second rotating shaft 340' passes through the inner ring of the impeller bearing 660. This structure can reduce the shaking of the rotating shaft or the second rotating shaft during operation and improve the stability of the canned electric pump.

The present invention is not limited to the above-described embodiments. As long as various changes or deformations can be made to the present invention without departing from the spirit and scope of the present invention, and if these changes and deformations fall within the claims and equivalent technical scope of the present invention, the present invention will also be considered. These modifications and variations are intended to be included.

Claims

A low-power double-canned electric pump combination, including two low-power canned electric pumps assembled together along the same axis - a first canned electric pump and a second canned electric pump, and one end of the motors of the two low-power canned electric pumps The stator shielding sleeve (100) is close together and integrated by injection molding, and the other end drives the impeller of the respective pump.
A low-power double-shielded electric pump combination according to claim 1, characterized in that one end of the motors of the two low-power canned electric pumps is close to each other and the stator shielding sleeves are injection molded into one body. Specifically, the first canned electric pump is The motor of the second canned electric pump includes a first rotor (200) and a first stator plastic part (400), and the motor of the second canned electric pump includes a second rotor (300, 300′) and a second stator plastic part (500); The stator shielding sleeve (100) is injection molded on the fixedly connected first stator plastic part (400) and the second stator plastic part (500) and has a hollow inner cavity (20), and the first rotor (200) is installed On one side of the inner cavity (20) and driven by the rotating magnetic field generated by the first stator plastic part (400), the second rotor (300, 300') is installed on the other side of the inner cavity (20) and driven by The rotating magnetic field generated by the second stator plastic part (500) is driven.
A low-power double-shielded electric pump combination according to claim 2, characterized in that the first stator plastic sealing part (400) includes a first stator part (410) and a first stator part injection molded on the first stator part. 1. Plastic shell (420), the second stator plastic part (500) includes a second stator part (510) and a second plastic shell (520) injection molded on the second stator part.
A low-power double-shielded electric pump combination according to claim 3, characterized in that the first stator plastic sealing part (400) and the second stator plastic sealing part (500) are axially plugged and connected.
A low-power double-shielded electric pump combination according to claim 4, characterized in that: the first plastic-sealed part of the stator and the second plastic-sealed part of the stator are axially inserted and connected, specifically: the first plastic-sealed shell (420) The first boss (422) is axially raised, and the second plastic shell (520) is provided with a concave second groove (522) in the axial direction. The two pass through the first boss (422) and the second recess. The groove (522) is inserted; or the first plastic shell is provided with a concave first groove in the axial direction, and the second plastic shell is axially raised with a second boss, both of which pass through the first groove. Connect with the 2nd boss.
A low-power double-shielded electric pump combination according to claim 3, characterized in that: the main body of the stator shielding sleeve (100) is a cylindrical body, which includes an annular shell part (110), located in the shell part The inner shell part (120) and the connecting part (130) connecting the outer shell part and the inner shell part, the first stator plastic sealing part (400) and the second stator plastic sealing part (500) are located in the outer shell part and the inner shell part. In the space enclosed by the shell part and the connecting part, the hollow space of the inner shell part (120) forms an inner cavity (20), and the inner wall surface of the inner cavity (20) has a bump (140) protruding inward. The first rotor (200) and the second rotor (300, 300') are respectively located on both axial sides of the bump (140).
A low-power double-shielded electric pump combination according to claim 6, characterized in that: a first shaft hole (421) is provided in the axial direction of the first plastic shell (420), and the second plastic shell (520) ) is located in the second shaft hole (521) on the other side of the axis in the fixed connection state.
A low-power double-shielded electric pump combination according to claim 7, characterized in that: it also includes a plug cover (600) with a cylindrical main body, and the connecting part (130) is provided with a plug facing the first axis hole. The first axial hole (131) and the second axial hole (132) facing the second axial hole, the plug cover (600) is fixedly provided on the first axial hole (131) and the second axial hole (132) on.
A low-power double-shield electric pump combination according to claim 6, characterized in that: the first stator part (410) includes a first iron core (411), a first iron core (411), and a first winding (412). 1 insert (413), the first winding (412) is sealed in the first plastic shell (420); the second stator part (510) includes a second iron core (511), and a second winding (512 ) is electrically connected to the second insert (513), the second winding (512) is sealed in the second plastic shell (520); the pins (415) of the first insert (413) and the second insert The pins (515) of the blade (513) extend radially outward through the housing portion (110) of the stator shielding sleeve (100).
A low-power double-shielded electric pump combination according to claim 9, characterized in that: it also includes a circuit board (630) and a side cover (640), and the stator shielding sleeve (100) is also included in the outer shell part (110) )'s outer peripheral wall protrudes outward to form a cylindrical peripheral portion (150), and the circuit board (630) is disposed in the installation cavity (30) enclosed by the peripheral portion (150) and the side cover (640). ), the pins of the first blade and the second blade are electrically connected to the circuit board (630).
A low-power double-shielded electric pump combination according to claim 10, characterized in that it also includes a first pin (710) that conductively connects the circuit board (630) and the first iron core (411) and a circuit The plate (630) and the second core conductor (511) are electrically connected to the second pin (720).
A low-power double-shielded electric pump combination according to claim 11, characterized in that it also includes a first spring (730) and a second spring (740), and the stator shielding sleeve (100) is close to the first iron Radial through holes are respectively provided on the outer cylinder surface of the core (411) and the second iron core (511), and the first spring (730) and the second spring (740) are respectively installed in the two radial through holes. , and the first spring (730) electrically conducts the first iron core (411) and the first pin (710), and the second spring (740) electrically conducts the second iron core (412) and the second pin (720) Pass.
A low-power double-shielded electric pump combination according to claim 6, characterized in that: at least one side of the axial direction of the bump (140) is set with a stator shielding sleeve boss (141), and the stator shielding sleeve boss (141) is The platform is provided with an axis hole (142).
A low-power double-shielded electric pump combination according to claim 13, characterized by: further comprising a first rotating shaft (240) fixedly installed on the shaft hole, a first impeller portion (230) located at one axial end and The second impeller part (330) is located at the other end of the axial direction; the first rotor (200) includes a first magnetic core (210), a first bearing (220) and a first impeller part (230). The impeller part (230) includes a first plastic connection part (231) that fixedly connects the first magnetic core and the first bearing, and a first impeller part (232) located at one axial end of the first plastic connection part. The first rotor (200) is rotatably installed on the first rotating shaft (240); and/or it also includes a second rotating shaft (340) fixedly installed on the shaft hole, and the second rotor (300) includes a second magnetic core (310) ), the second bearing (320) and the second impeller part (330). The second impeller part (330) includes a second plastic connecting part (331) that fixedly connects the second magnetic core and the second bearing and a 2. The plastic connection part is the second impeller part (332) at one axial end, and the second rotor (300) is rotatably installed on the second rotating shaft (340).
A low-power double-shield electric pump combination according to claim 13, characterized in that: the impeller includes a first impeller part located on one side of the axial direction and a second impeller part located on the other side of the axial direction (330' ); the first rotor includes a first magnetic core, a first sleeve, a first rotating shaft, a first impeller portion fixed on one end of the first rotating shaft, and a first rotor fixedly connecting the first magnetic core and the first sleeve The connection part, the first rotating shaft and the first sleeve are fixedly connected; and/or the second rotor (300′) includes a second magnetic core (310′), a second sleeve (320′), and a second rotating shaft (340'), the second impeller part (330') fixed to one end of the second rotating shaft, and the second rotor connecting part (350') that fixedly connects the second magnetic core and the second sleeve. The second rotating shaft (340'), 330′) is fixedly connected to the second shaft sleeve (320′).
A low-power double-shielded electric pump combination according to claim 15, characterized by: further comprising an end cover (650) provided on the stator shielding sleeve (100) on the side where the second rotor (300') is installed; An impeller bearing (660) is provided on the end cover, and the first rotating shaft or the second rotating shaft (340') passes through the inner ring of the impeller bearing (660).