CN213899313U - High-power brushless electronic water pump - Google Patents

Abstract

The utility model discloses a high-power brushless electronic water pump, which comprises a shell, the insulation sleeve and the upper cover, an installation cavity is formed between the insulation sleeve and the shell, a fluid cavity is formed between the insulation sleeve and the upper cover, a stator assembly and a PCB are fixed in the installation cavity, a rotor assembly is installed in the fluid cavity in a rotating mode, the rotor assembly comprises an impeller and a rotor shaft sleeve, the impeller is fixed at the upper end portion of the rotor shaft sleeve, an upper wear-resistant lubricating insert and a lower wear-resistant lubricating insert are embedded into the upper end portion and the lower end portion of the rotor shaft sleeve respectively in a concentric mode, a rotor core is fixed on the periphery of the rotor shaft sleeve, sintered Ru iron boron magnetic steel is uniformly distributed on the circumference of the circle center of the rotor core, a rotor sleeve shell is fixed outside the rotor shaft sleeve, a positioning center shaft is arranged on the insulation sleeve and inserted into a center hole, a heat dissipation device connected with the PCB in a heat conduction mode is arranged on the shell, and a plug connected with an external lead is arranged on the shell. The brushless electronic water pump can improve the magnetism of the rotor, so that the power of the brushless electronic water pump is improved.

Description

High-power brushless electronic water pump

Technical Field

The utility model relates to an electronic water pump for the high-power brushless electronic water pump who uses on the vehicle.

Background

The electronic water pump drives the impeller to rotate by utilizing the magnetic action between the rotor and the stator. The applicant applied for a brushless electronic water pump with the patent number of 201720017208.3 in 2017, wherein a rotor assembly of the brushless electronic water pump always rotates smoothly, the rotation resistance is small, the water outlet efficiency is high, the reliability of the electronic water pump is higher, and the service life of the electronic water pump is longer. However, the brushless electronic water pump still has the following disadvantages in practical use:

1. rotor assembly includes the impeller and sets up in the connecting cylinder of impeller bottom, the concentric embedding in the hole of connecting cylinder is fixed with wear-resisting lubricated inserts, be provided with the centre bore that sets up with the hole of connecting cylinder is concentric on the wear-resisting lubricated inserts, the outside concentric suit of connecting cylinder is fixed with a yoke section of thick bamboo, and the outside concentric suit of a yoke section of thick bamboo is fixed with a magnetic ring section of thick bamboo, and this kind of structure leads to a magnetic ring section of thick bamboo, a yoke section of thick bamboo and wear-resisting lubricated inserts to need injection moulding as an organic whole, and a magnetic ring section of thick bamboo is the neodymium iron boron that moulds plastics also, and the magnetism of this kind of magnetic ring section of thick bamboo is smaller, therefore this brushless electronic water pump is less because of magnetic force under the condition that the volume is limited, and the moment of torsion that produces is smaller, and brushless electronic water pump's power can't do greatly.

2. The lower end face of the wear-resistant lubricating insert is higher than the lower end face of the connecting cylinder, an insertion cavity is formed between the lower end face of the wear-resistant lubricating insert and an inner hole of the connecting cylinder, an insertion bulge inserted into the insertion cavity is arranged in a fluid cavity on the isolating sleeve, a lower gasket is arranged between the upper end of the insertion bulge and the wear-resistant lubricating insert, water is accumulated in a gap between the insertion bulge and the insertion cavity, and therefore the rotor can drive the accumulated water in the insertion cavity to rotate in the rotating process, so that an inner rotational flow is formed, and large noise is caused;

3. in 201720017208.3A and 4B, spiral water flow half grooves are respectively arranged on the upper end surface of the spacer sleeve and the lower end surface of the upper cover, the two spiral water flow half grooves are mutually matched to form a spiral water flow channel so as to guide the liquid flowing in from the water inlet of the upper cover to the water outlet, however, the structure needs the upper cover to be mutually fixed on the spacer sleeve at a specific angle and position to mutually match the spiral water flow half grooves when being fixed, the installation difficulty is higher, meanwhile, once the brushless electronic water pump is designed, the relative positions of the water inlet, the water outlet and the plug of the water pump are determined, the relative position relations of the water inlet, the water outlet and the plug are not necessarily the same in each vehicle host factory, therefore, a plurality of brushless electronic water pumps with different relative angles need to be designed due to different assembly requirements of different vehicle host factories, and products are various and complicated;

4. as shown in fig. 5 of the brushless electronic water pump of 201720017208.3, the heat sink 301 includes an arc-shaped heat sink base plate 3011 and heat sink fins 3012 disposed at the bottom of the heat sink base plate 3011, an embedding protrusion 3013 is disposed on the heat sink base plate 3011, the sealing ring 302 is sleeved on the embedding protrusion 3013, the embedding protrusion 3013 is plugged into the mounting through hole and fixed with the heat conducting pressing sheet 304 by screws, the heat sink of this structure has a small heat dissipation area, and can meet the heat dissipation requirement in the electronic water pump with small power, but cannot meet the heat dissipation requirement in the electronic water pump with large power. In addition, the sealing ring 302 is sleeved outside the embedding protrusion 3013 and then is embedded into the housing as a whole, and the sealing of the sealing ring is realized by the contact and extrusion sealing of the inner ring and the outer ring. The plug is arranged at the bottom and is integrally formed with the shell, and when the brushless electronic water pump is maintained and repaired, particularly when a PCB is overhauled, the PCB can be replaced after an upper cover, a rotor and a stator of the whole electronic water pump are all disassembled, so that the maintenance and the repair are difficult.

5. In 201720017208.3 brushless electric water pump, after the PCB board is directly positioned with the stator core through the plug-in embedded foot 4014 and the fixed embedded hole, then the PCB board is welded and fixed with the stator winding and the pins of the plug piece, thus when in use, the electric water pump can generate violent vibration due to bumping of the vehicle, the shell directly transmits the vibration to the stator core and then directly transmits the vibration to the PCB board, thus easily leading to the looseness of the welding position of the pins and leading to the occurrence of faults.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the brushless electronic water pump with high power can improve the magnetism of a rotor, so that the power of the brushless electronic water pump is improved.

In order to solve the technical problem, the technical scheme of the utility model is that: a high-power brushless electronic water pump comprises a shell, an isolation sleeve and an upper cover which are detachably fixed, wherein an installation cavity is formed between the isolation sleeve and the shell, a fluid cavity is formed between the isolation sleeve and the upper cover, the fluid cavity and the installation cavity are mutually independent, a stator assembly and a PCB (printed circuit board) are fixed in the installation cavity, a rotor assembly matched with the stator assembly is installed in the fluid cavity in an indoor rotating mode, a water inlet and a water outlet are formed in the upper cover, the rotor assembly comprises an impeller and a rotor shaft sleeve, the impeller is fixed at the upper end of the rotor shaft sleeve, an upper wear-resistant lubricating insert and a lower wear-resistant lubricating insert are concentrically embedded in an inner hole at the lower end of the rotor shaft sleeve respectively, center holes concentrically arranged with an inner hole of the rotor shaft sleeve are formed in the upper wear-resistant lubricating insert and the lower wear-resistant lubricating insert, a rotor core is fixed at the periphery of the rotor shaft sleeve, the periphery of rotor core has a plurality of sintering Ru indisputable boron magnet steel around the centre of a circle circumference equipartition of centre bore, the external fixation of rotor shaft sleeve has rotor cover shell fixed with rotor core and sintering Nd-Fe-B magnet steel parcel, be provided with the location center pin on the isolation cover, the location center pin inserts in the centre bore, be provided with the heat abstractor who is connected with PCB board heat conduction on the shell, be provided with the plug of being connected with external conductor on the shell.

Preferably, the impeller comprises a lower impeller half body and an upper impeller half body, the lower part of the lower impeller half body is provided with a mounting cylinder part, a metal insert is in interference fit in an inner hole of the mounting cylinder part, and the metal insert is sleeved on the upper end part of the rotor shaft sleeve and is in interference fit with the upper end part of the rotor shaft sleeve.

Preferably, the lower wear-resistant lubricating insert is exposed from the lower end of the rotor shaft sleeve, a reinforcing protrusion protruding downwards is arranged outside the isolation sleeve, the positioning central shaft is inserted into the reinforcing protrusion, and the lower part of the lower wear-resistant lubricating insert is in surface contact fit with the bottom of the fluid chamber.

Preferably, the upper cover is provided with a spiral water flow groove, the upper surface of the isolation sleeve is in sealing fit with the end face of the upper cover, and the lower part of the spiral water flow groove is blocked by the upper surface of the isolation sleeve to form a spiral water flow channel of the fluid chamber.

As a preferred scheme, the water inlet of the upper cover is arranged at the upper part of the upper cover, the water outlet is arranged at the side surface of the upper cover, an upper fixing column is arranged in the water inlet and fixed on the side wall of the water inlet through a plurality of discrete connecting ribs, a fixing blind hole for compressing the upper end of the positioning central shaft is arranged on the upper fixing column, and a water inlet gap for facilitating the passage of fluid is formed between the discrete connecting ribs.

As a preferred scheme, the stator assembly comprises a stator core, an upper insulating end cover, a lower insulating end cover, a conductive support and a PCB, wherein the upper insulating end cover and the lower insulating end cover are respectively embedded and fixed at the upper end and the lower end of the stator core, a stator winding is wound between the upper insulating end cover and the lower insulating end cover, a plurality of damping supporting bulges are arranged at the lower part of the lower insulating end cover, the conductive support is arranged below the lower insulating end cover, the conductive support and the stator core are fixed inside the shell through fasteners, damping columns are arranged between the conductive support and the damping supporting bulges, the stator winding is in conductive connection with wire clamping pins arranged on the lower insulating end cover, the PCB is arranged below the conductive support, a clamping structure and a positioning column are arranged at the lower end of the conductive support, the positioning column is inserted into a positioning hole of the PCB, the wire clamping pin penetrates through the conductive support and is inserted into the conductive connecting hole of the PCB and is fixedly welded, and the clamping structure is used for clamping and fixing the PCB.

As a preferable scheme, the clamping structure comprises at least three clamping components distributed circumferentially, each clamping component comprises at least two supporting columns and one clamping column, the supporting columns and the clamping columns are arranged on the lower end face of the conductive support and distributed on three vertexes of a triangle, clamping claw parts are arranged at the end parts of the clamping columns, and matching notches corresponding to the clamping claw parts are arranged on the PCB.

As a preferred scheme, a mounting window is arranged on the side surface of the housing, the plug is detachably mounted at the mounting window, a connecting pin of the plug is plugged into the mounting window and is welded and fixed with a corresponding conductive connecting hole of the PCB, and the heat dissipation device is detachably mounted on the lower end surface of the housing.

As a preferred scheme, heat abstractor includes the cooling cover, the lower terminal surface of cooling cover is provided with heat radiation fins, the up end of cooling cover is provided with the retaining ring that the epirelief stretched, and the up end of retaining ring and cooling cover forms the installation step, the retaining ring embedding in the hole of shell, the up end of cooling cover or the lower terminal surface of shell set up in the sealing washer caulking groove, install the sealing washer in this sealing washer caulking groove, the up end of cooling cover and the lower terminal surface of shell mutually support the extrusion the sealing washer.

As a preferred scheme, the outside cover of shell is equipped with the shock attenuation cover, be provided with location arch and positioning groove on the outside of shell and the hole of shock attenuation cover, the lower terminal surface of shock attenuation cover is provided with the protruding location jack catch that stretches downwards and block installation window both sides.

After the technical scheme is adopted, the utility model discloses an effect is: because the rotor assembly comprises an impeller and a rotor shaft sleeve, the impeller is fixed at the upper end part of the rotor shaft sleeve, an upper wear-resistant lubricating insert and a lower wear-resistant lubricating insert are respectively and concentrically embedded in the inner hole at the upper end and the lower end of the rotor shaft sleeve, the upper wear-resistant lubricating insert and the lower wear-resistant lubricating insert are provided with center holes which are concentrically arranged with the inner hole of the rotor shaft sleeve, the periphery of the rotor shaft sleeve is fixed with a rotor core, the periphery of the rotor core is uniformly distributed with a plurality of sintered Ru-Fe-B magnetic steels around the circle center circumference of the center hole, the outer part of the rotor shaft sleeve is fixed with a rotor sleeve shell which wraps and fixes the rotor core and the sintered Nd-Fe-B magnetic steels, a positioning center shaft is arranged on the isolation sleeve and is inserted into the center hole, the shell is provided with a heat dissipation device, in the rotor assembly of the brushless electronic water pump, a rotor core and sintered Ru Fe B magnetic steel are fixed inside a rotor sleeve shell, then an upper wear-resistant lubricating insert and a lower wear-resistant lubricating insert are arranged on a rotor shaft sleeve to realize rotary lubrication, the rotor assembly realizes the fixation of the sintered Ru Fe B magnetic steel, compared with injection-molded Ru Fe B, the magnetic property is stronger, the power of the water pump under the same volume can be higher, meanwhile, an upper wear-resistant lubricating insert and a lower wear-resistant lubricating insert are only arranged at two ends of the rotor shaft sleeve, compared with the whole cylindrical wear-resistant lubricating insert in the whole background technology, the manufacturing difficulty is lower, the whole cylindrical wear-resistant lubricating insert is difficult to ensure enough coaxiality to be contacted with a positioning central shaft, so that the phenomenon of local contact can occur, and the upper wear-resistant lubricating insert and the lower wear-resistant lubricating insert are respectively contacted with different parts of a stator central shaft, the contact surface may be more and therefore smoother.

The impeller comprises a lower impeller half body and an upper impeller half body, the lower part of the lower impeller half body is provided with an installation cylinder part, a metal insert is in interference fit in an inner hole of the installation cylinder part, and the metal insert is sleeved at the upper end part of the rotor shaft sleeve and is in interference fit. The structure of the impeller can be conveniently in interference fit with the rotor shaft sleeve by utilizing the metal insert, and meanwhile, the impeller and the rotor shaft sleeve are arranged in a split manner, so that the wear-resistant lubricating insert and the lower wear-resistant lubricating insert are conveniently arranged at two ends of the rotor shaft sleeve.

And because the lower wear-resistant lubricating insert is exposed from the lower end of the rotor shaft sleeve, the outside of the isolating sleeve is provided with a reinforcing bulge which protrudes downwards, the positioning central shaft is inserted into the reinforcing bulge, the lower part of the lower wear-resistant lubricating insert is in contact fit with the bottom surface of the fluid chamber, and because the outside of the isolating sleeve is provided with the reinforcing bulge which protrudes downwards, the fixing is firmer with enough insertion depth for the positioning central shaft, and meanwhile, the reinforcing bulge protrudes downwards, and meanwhile, the lower wear-resistant lubricating insert is exposed from the lower end of the rotor shaft sleeve and is in contact fit with the bottom surface of the fluid chamber, namely, the inside of the rotor shaft sleeve has no space for retaining fluid, so that the inside of the rotor does not have rotational flow in the process of high-speed rotation, and abnormal sound of water flow is reduced.

And because the upper cover is provided with the spiral water flow groove, the upper surface of the isolation sleeve is in sealing fit with the end face of the upper cover, the upper surface of the isolation sleeve seals the lower part of the spiral water flow groove to form the spiral water flow channel of the fluid chamber, and because the whole spiral water flow channel is arranged on the upper cover and the upper surface of the isolation sleeve is in sealing fit with the end face of the upper cover, the same structure can adjust the assembly angle between the isolation sleeve and the upper cover according to the requirements of different customers during assembly, the relative angle between the water outlet, the water inlet and the plug is also adjusted, the requirements of different customers are met, so that various molds do not need to be opened, the integral product is few in variety and specification, and the product management is convenient.

And because the water inlet of the upper cover is arranged at the upper part of the upper cover, the water outlet is arranged at the side surface of the upper cover, the upper fixing column is arranged in the water inlet and is fixed on the side wall of the water inlet through a plurality of discrete connecting ribs, the upper fixing column is provided with a fixing blind hole for tightly pressing the upper end of the positioning central shaft, and a water inlet gap for facilitating the passage of fluid is formed between the discrete connecting ribs. The upper cover utilizes the upper fixing column to assist in positioning the upper end of the central shaft, so that the positioning central shaft is prevented from being in a cantilever state, and the fluid can conveniently enter while the stability of the positioning central shaft is improved.

The stator assembly comprises a stator core, an upper insulating end cover, a lower insulating end cover, a conductive support and a PCB, wherein the upper insulating end cover and the lower insulating end cover are respectively embedded and fixed at the upper end and the lower end of the stator core, a stator winding is wound between the upper insulating end cover and the lower insulating end cover, a plurality of damping supporting bulges are arranged at the lower part of the lower insulating end cover, the conductive support is arranged below the lower insulating end cover, the conductive support and the stator core are fixed in the shell through fasteners, damping columns are arranged between the conductive support and the damping supporting bulges, the stator winding is in conductive connection with wire clamping pins arranged on the lower insulating end cover, the PCB is arranged below the conductive support, a clamping structure and a positioning column are arranged at the lower end of the conductive support, the positioning column is inserted into a positioning hole of the PCB, the wire clamping pins penetrate through the conductive support and are inserted into a conductive connecting hole of the PCB and are welded and fixed, the clamping structure is used for clamping the PCB, the stator assembly comprises a conductive support, the conductive support is fixed with the PCB in a clamping mode, a shock absorption column is arranged between the conductive support and the lower insulating end cover, and therefore when an external water pump vibrates, the shell vibrates to drive the stator core to vibrate.

The clamping structure comprises at least three clamping components distributed circumferentially, each clamping component comprises at least two supporting columns and one clamping column, the supporting columns and the clamping columns are arranged on the lower end face of the conductive support and distributed on three vertexes of a triangle, the end portions of the clamping columns are provided with the clamping claw portions, the PCB is provided with matching notches corresponding to the clamping claw portions, the clamping structure enables the PCB to be fixed firmly through multi-point clamping, and meanwhile, each fixing point is supported by the two supporting columns and the clamping column, so that the support is smoother and more reliable.

And because the side of the shell is provided with the mounting window, the plug is detachably mounted at the mounting window, the connecting pin of the plug is plugged into the mounting window and is welded and fixed with the corresponding conductive connecting hole of the PCB, the heat dissipation device is detachably mounted on the lower end surface of the shell, and because the plug is arranged on the side, the heat dissipation device is provided with the lower end surface, the area of the heat dissipation device can cover the end surface of the whole shell, the heat dissipation effect is better, and the heat dissipation requirement of the high-power brushless electronic water pump is further met.

Because the heat dissipation device comprises a heat dissipation cover, the lower end surface of the heat dissipation cover is provided with heat dissipation fins, the upper end surface of the heat dissipation cover is provided with a positioning ring which protrudes upwards, the positioning ring and the upper end surface of the heat dissipation cover form an installation step, the positioning ring is embedded into the inner hole of the shell, the upper end surface of the heat radiating cover or the lower end surface of the shell is arranged in the sealing ring embedding groove, the sealing ring is arranged in the sealing ring caulking groove, the upper end surface of the heat radiating cover and the lower end surface of the shell are mutually matched to extrude the sealing ring, thus, the heat dissipation cover can be conveniently detached, the sealing ring is sealed in a surface-to-surface extrusion mode, even long-term use still can guarantee reliable leakproofness, when maintaining the maintenance, and need not to dismantle rotor assembly and stator assembly and only need the heat dissipation lid to dismantle and can change and maintain the PCB board, it is more convenient to maintain the maintenance.

And because the outer part of the shell is sleeved with the damping sleeve, the outer part of the shell and the inner hole of the damping sleeve are provided with the positioning protrusion and the positioning groove, the lower end face of the damping sleeve is provided with the positioning clamping jaws which protrude downwards and clamp the two sides of the mounting window, the damping sleeve is utilized to facilitate the whole shell to be fixed on the whole vehicle, the damping effect is further realized, the damping sleeve and the shell can be accurately positioned, and the positioning clamping jaws can clamp the two sides of the mounting window, so that the positioning is realized, and the assembly is convenient and accurate.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the invention;

FIG. 3 is an exploded view of a rotor assembly and housing according to an embodiment of the present invention;

FIG. 4 is an exploded view of the stator assembly, conductive bracket, PCB board;

FIG. 5 is a perspective view of the upper cover;

FIG. 6 is a perspective view of the spacer sleeve;

FIG. 7 is a cross-sectional view of the upper cover, rotor assembly, spacer sleeve;

FIG. 8 is a perspective view of the mounting of the conductive bracket;

FIG. 9 is a perspective view of the outer shell and shock absorbing sleeve;

in the drawings: 1. a housing; 11. an outer housing; 12. a shock-absorbing sleeve; 13. installing a window; 14. positioning the projection; 15. a positioning groove; 16. positioning the clamping jaw; 2. an isolation sleeve; 21. a reinforcing protrusion; 22. positioning the central shaft; 3. an upper cover; 31. a water inlet; 32. a water outlet; 33. an upper fixing column; 34. connecting ribs; 35. a spiral water flow groove; 4. a rotor assembly; 41 an impeller; 411. an upper impeller half body; 412. a lower impeller half body; mounting a cartridge portion; 414. a metal insert; 42. a rotor shaft sleeve; 43. an upper wear-resistant lubricating insert; 44. a lower wear-resistant lubricating insert; 45. a rotor core; 46. sintering the Ru Fe B magnetic steel; 47. a rotor housing shell; 471. rotor sleeve housing cylinder; 472. a lower sealing plate; 473. an upper sealing plate; 5. a stator assembly; 51. an upper insulating end cover; 52. a stator core; 53. a lower insulating end cap; 531. a shock-absorbing support boss; 532. a wire clamping pin; 6. a conductive support; 61. a positioning column; 62. a clamping structure; 621. a support pillar; 622. clamping the column; 623. a claw part is pressed; 63. a shock-absorbing post; 7, PCB board; 8. a plug; 9. a heat dissipation cover; 91. a retaining ring.

Detailed Description

The present invention will be described in further detail with reference to the following examples.

As shown in fig. 1 to 9, a high-power brushless electronic water pump, including can dismantle fixed shell 1, separation sleeve 2 and upper cover 3, wherein the utility model discloses the high-power is a relative concept, and does not specifically calculate high-power to certain power, the utility model discloses brushless electronic water pump in the scheme is bigger for the brushless electronic water pump power that mentions in the background art. The previous power is 65W, and the current brushless electronic water pump can achieve 110W.

The isolation sleeve 2 and the shell 1 form a mounting chamber, the isolation sleeve 2 and the upper cover 3 form a fluid chamber, the fluid chamber and the installation chamber are independent from each other, the housing 1 comprises an outer shell 11 and a damping sleeve 12, the side surface of the housing 1 is provided with an installation window 13, the mounting window 13 is used for detachably mounting the plug 8, the plug 8 is detachably mounted at the mounting window 13 through bolts, the connecting pins of the plug 8 are plugged into the mounting window 13, so as to be conveniently welded and fixed with the corresponding conductive connecting holes of the PCB 7, the outer part of the shell 1 and the inner hole of the damping sleeve 12 are provided with a positioning bulge 14 and a positioning groove 15, the lower end face of the shock absorption sleeve 12 is provided with a positioning claw 16 which protrudes downwards and clamps two sides of the mounting window 13, through the structure, the shock-absorbing sleeve 12 can be better fixed, and meanwhile, the rotation dislocation between the shock-absorbing sleeve 12 and the outer shell 11 is avoided.

The mounting cavity is internally fixed with a stator assembly 5 and a PCB (printed circuit board) 7, the fluid cavity is internally rotatably provided with a rotor assembly 4 matched with the stator assembly 5, and the upper cover 3 is provided with a water inlet 31 and a water outlet 32.

As shown in fig. 2 and 7, the rotor assembly 4 includes an impeller 41 and a rotor bushing 42, the rotor bushing 42 is a metal bushing, the impeller 41 is fixed to an upper end portion of the rotor bushing 42, the impeller 41 includes a lower impeller half 412 and an upper impeller half 411, a mounting cylinder portion 413 is disposed at a lower portion of the lower impeller half 412, a metal insert 414 is in interference fit with an inner hole of the mounting cylinder portion 413, and the metal insert 414 is fitted to the upper end portion of the rotor bushing 42 and in interference fit with the upper impeller half 411, so that the rotor bushing 42 and the impeller 41 are in interference fit to rotate together.

An upper wear-resistant lubricating insert 43 and a lower wear-resistant lubricating insert 44 are concentrically embedded in inner holes at the upper end and the lower end of the rotor shaft sleeve 42 respectively, central holes which are concentrically arranged with the inner holes of the rotor shaft sleeve 42 are formed in the upper wear-resistant lubricating insert 43 and the lower wear-resistant lubricating insert 44, a rotor core 45 is fixed on the periphery of the rotor shaft sleeve 42, a plurality of sintered Ru iron boron magnetic steels 46 are uniformly distributed on the periphery of the rotor core 45 around the circle center circumference of the central holes, a rotor sleeve shell 47 for wrapping and fixing the rotor core 45 and the sintered Nd-Fe-B magnetic steels is fixed on the outer portion of the rotor shaft sleeve 42, a positioning central shaft 22 is arranged on the isolation sleeve 2, and the positioning central shaft 22 is inserted into the central holes,

in this embodiment, the lower wear-resistant lubricating insert 44 is exposed from the lower end of the rotor shaft sleeve 42, the outside of the isolation sleeve 2 is provided with a reinforcing protrusion 21 protruding downwards, the positioning central shaft 22 is inserted into the reinforcing protrusion 21, and the lower part of the lower wear-resistant lubricating insert 44 is in surface contact fit with the bottom of the fluid chamber. The rotor sleeve shell 47 comprises a rotor sleeve shell cylinder 471, a lower sealing plate 472 and an upper sealing plate 473, the rotor core 45 and the sintered Ru-Fe-B magnetic steel 46 are wrapped by the mutual welding of the rotor sleeve shell cylinder 471, the lower sealing plate 472 and the upper sealing plate 473, the upper sealing plate 473 and the central hole of the sealing plate are sleeved on the rotor shaft sleeve 42 and are welded and fixed, and a sealing structure is formed integrally; and a plurality of axial convex ridges are arranged on the periphery of the part of the rotor shaft sleeve 42, which is matched with the rotor core 45, so that the rotor shaft sleeve 42 and the rotor core 45 are in interference fit conveniently.

The heat dissipation device is arranged on the shell 1 and connected with the PCB 7 in a heat conduction mode, and the plug 8 connected with an external lead is arranged on the shell 1. The heat sink is detachably mounted on the lower end surface of the housing 1. The heat dissipation device comprises a heat dissipation cover 9, the lower end face of the heat dissipation cover is provided with heat dissipation fins, the upper end face of the heat dissipation cover 9 is provided with a positioning ring 91 protruding upwards, the upper end faces of the positioning ring 91 and the heat dissipation cover 9 form an installation step, the positioning ring 91 is embedded into the inner hole of the shell 1, the upper end face of the heat dissipation cover 9 or the lower end face of the shell 1 are arranged in a sealing ring embedded groove, a sealing ring is installed in the sealing ring embedded groove, and the upper end face of the heat dissipation cover 9 and the lower end face of the shell 1 are mutually matched and extruded with the sealing ring. And heat conducting glue is filled between the upper end face of the heat radiating cover 9 and the PCB 7 for conducting heat.

The water inlet 31 of the upper cover 3 is arranged at the upper part of the upper cover 3, the water outlet 32 is arranged at the side surface of the upper cover 3, an upper fixing column 33 is arranged in the water inlet 31, the upper fixing column 33 is fixed on the side wall of the water inlet 31 through a plurality of discrete connecting ribs 34, a fixing blind hole for pressing the upper end of the positioning central shaft 22 is arranged on the upper fixing column 33, and a water inlet gap for facilitating the passage of fluid is formed between the discrete connecting ribs 34.

The upper cover 3 is provided with a spiral water flow groove 35, the upper surface of the isolation sleeve 2 is in sealing fit with the end face of the upper cover 3, and the lower part of the spiral water flow groove 35 is plugged by the upper surface of the isolation sleeve 2 to form a spiral water flow channel of the fluid chamber.

As shown in fig. 4 and 8, the stator assembly 5 includes a stator core 52, an upper insulating end cap 51, a lower insulating end cap 53, a conductive bracket 6 and a PCB board 7, the upper insulating end cover 51 and the lower insulating end cover 53 are respectively embedded and fixed at the upper end and the lower end of the stator core 52, a stator winding (omitted in the figure) is wound between the upper insulating end cover 51 and the lower insulating end cover 53, the lower part of the lower insulating end cover 53 is provided with a plurality of shock absorption supporting bulges 531, the conductive bracket 6 is arranged below the lower insulating end cover 53, the conductive bracket 6 and the stator core 52 are fixed inside the housing 1 by fasteners, a shock absorbing column 63 is arranged between the conductive bracket 6 and the shock absorbing support protrusion 531, be provided with the mounting hole on this shock attenuation post 63, be provided with the arch on the electrically conductive support 6, the mounting hole cover of shock attenuation post 63 realizes fixing a position and installing in the arch.

The stator winding is in conductive connection with a wire clamping pin 532 arranged on the lower insulating end cover 53, an enameled wire of the stator winding is drawn to the wire clamping pin 532 to be clamped and welded, the PCB 7 is arranged below the conductive support 6, the lower end of the conductive support 6 is provided with a clamping structure 62 and a positioning column 61, the positioning column 61 is inserted into a positioning hole of the PCB 7, the wire clamping pin 532 penetrates through the conductive support 6 and is inserted into a conductive connecting hole of the PCB 7 and is welded and fixed, and the clamping structure 62 clamps and fixes the PCB 7.

In this embodiment, the clamping structure 62 includes at least three clamping components distributed circumferentially, each clamping component includes at least two supporting columns 621 and one clamping column 622, the supporting columns 621 and the clamping columns 622 are disposed on the lower end surface of the conductive support 6 and distributed on three vertices of a triangle, the end portion of the clamping column 622 is provided with a pressing claw portion 623, and the PCB board 7 is provided with a matching notch corresponding to the pressing claw portion 623, so that the matching notch of the PCB directly corresponds to the clamping column 622 when the PCB is mounted, at this time, the positioning column 61 also corresponds to the positioning hole, and then the PCB board 7 is flatly mounted on the conductive support 6 by pressing.

The utility model discloses a brushless electronic water pump compares brushless electronic water pump among the background art and has following advantage:

1. the brushless electronic water pump of the utility model has larger power which can reach 110W, the rotor assembly 4 of the water pump is optimized, the sintered neodymium iron boron magnetic block is convenient to install, and the magnetic force and the rotor torque are greatly enhanced;

2. the utility model can reduce the noise generated by the rotational flow in the water pump;

3. the water pump of the utility model has better heat dissipation effect and is more suitable for the heat dissipation requirement of a high-power water pump;

4. the utility model discloses a water pump anti-vibration ability is strong, utilizes the shock attenuation of shock attenuation cover 12, reduces holistic vibrations, then utilizes electrically conductive support 6 to fix PCB board 7 to the firm degree of PCB board 7 has been improved.

The above-mentioned embodiments are only descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and all modifications and changes made by the technical solution of the present invention should fall within the protection scope defined by the claims of the present invention on the basis of not departing from the spirit of the present invention.

Claims (10)

1. The utility model provides a high-power brushless electronic pump, is including dismantling fixed shell, separation sleeve and upper cover, the installation cavity has been constituted between separation sleeve and the shell, the fluid cavity has been constituted between separation sleeve and the upper cover, fluid cavity and installation cavity mutual independence, installation cavity indoor location has stator assembly and PCB board, the indoor rotation of fluid cavity install with stator assembly complex rotor assembly, be provided with water inlet and delivery port on the upper cover, its characterized in that: the rotor assembly comprises an impeller and a rotor shaft sleeve, the impeller is fixed at the upper end part of the rotor shaft sleeve, an upper wear-resistant lubricating insert and a lower wear-resistant lubricating insert are concentrically embedded in an inner hole at the lower end of the rotor shaft sleeve respectively, the upper wear-resistant lubricating insert and the lower wear-resistant lubricating insert are provided with central holes which are concentric with the inner hole of the rotor shaft sleeve, a rotor iron core is fixed on the periphery of the rotor shaft sleeve, a plurality of sintered Ru iron boron magnetic steels are uniformly distributed on the periphery of the rotor iron core around the circle center of the center hole, a rotor sleeve shell which wraps and fixes the rotor iron core and the sintered neodymium iron boron magnetic steel is fixed outside the rotor shaft sleeve, the isolating sleeve is provided with a positioning central shaft which is inserted into the central hole, the shell is provided with a heat dissipation device in heat conduction connection with the PCB, and the shell is provided with a plug connected with an external lead.

2. The high power brushless electric water pump as claimed in claim 1, wherein: the impeller comprises a lower impeller half body and an upper impeller half body, wherein the lower part of the lower impeller half body is provided with an installation cylinder part, a metal insert is arranged in an inner hole of the installation cylinder part in an interference fit mode, and the metal insert is sleeved at the upper end part of the rotor shaft sleeve in the interference fit mode.

3. The high power brushless electric water pump as claimed in claim 2, wherein: the lower wear-resistant lubricating insert is exposed from the lower end of the rotor shaft sleeve, a reinforcing protrusion protruding downwards is arranged outside the isolation sleeve, the positioning central shaft is inserted into the reinforcing protrusion, and the lower portion of the lower wear-resistant lubricating insert is in contact fit with the bottom surface of the fluid cavity.

4. A high power brushless electric water pump as claimed in claim 3, wherein: the upper cover is provided with a spiral water flow groove, the upper surface of the isolation sleeve is in sealing fit with the end face of the upper cover, and the lower part of the spiral water flow groove is plugged by the upper surface of the isolation sleeve to form a spiral water flow channel of the fluid chamber.

5. The high power brushless electric water pump as claimed in claim 4, wherein: the water inlet of the upper cover is arranged on the upper portion of the upper cover, the water outlet of the upper cover is arranged on the side face of the upper cover, an upper fixing column is arranged in the water inlet and fixed on the side wall of the water inlet through a plurality of discrete connecting ribs, a fixing blind hole for compressing the upper end of the positioning center shaft is formed in the upper fixing column, and a water inlet gap for enabling fluid to pass through is formed between the discrete connecting ribs.

6. The high power brushless electric water pump as claimed in any one of claims 1 to 5, wherein: the stator assembly comprises a stator core, an upper insulating end cover, a lower insulating end cover, a conductive support and a PCB, wherein the upper insulating end cover and the lower insulating end cover are respectively embedded and fixed at the upper end and the lower end of the stator core, a stator winding is wound between the upper insulating end cover and the lower insulating end cover, the lower part of the lower insulating end cover is provided with a plurality of damping supporting bulges, the conductive support is arranged below the lower insulating end cover, the conductive support and the stator core are fixed in the shell through fasteners, damping columns are arranged between the conductive support and the damping supporting bulges, the stator winding is in conductive connection with wire clamping pins arranged on the lower insulating end cover, the PCB is arranged below the conductive support, the lower end of the conductive support is provided with a clamping structure and a positioning column, the positioning column is inserted into a positioning hole of the PCB, and the wire clamping pins penetrate through the conductive support and are inserted into a conductive connecting hole of the PCB and are welded and fixed, the clamping structure clamps and fixes the PCB.

7. The high power brushless electric water pump as claimed in claim 6, wherein: the clamping structure comprises at least three clamping components distributed circumferentially, each clamping component comprises at least two supporting columns and one clamping column, the supporting columns and the clamping columns are arranged on the lower end face of the conductive support and distributed on three vertexes of a triangle, the end portions of the clamping columns are provided with clamping claw portions, and the PCB is provided with matching notches corresponding to the clamping claw portions.

8. The high power brushless electric water pump as claimed in claim 7, wherein: the side of shell is provided with the installation window, plug demountable installation in installation window department, the connecting pin of plug is plugged in the installation window and with the electrically conductive connecting hole welded fastening that corresponds of PCB board, heat abstractor demountable installation is in the lower terminal surface of shell.

9. The high power brushless electric water pump as claimed in claim 8, wherein: the heat dissipation device comprises a heat dissipation cover, the lower end face of the heat dissipation cover is provided with heat dissipation fins, the upper end face of the heat dissipation cover is provided with a positioning ring protruding upwards, an installation step is formed on the upper end faces of the positioning ring and the heat dissipation cover, the positioning ring is embedded into the inner hole of the shell, the upper end face of the heat dissipation cover or the lower end face of the shell are arranged in a sealing ring caulking groove, a sealing ring is installed in the sealing ring caulking groove, and the upper end face of the heat dissipation cover and the lower end face of the shell are mutually matched and extruded with the sealing ring.

10. The high power brushless electric water pump as claimed in claim 9, wherein: the outer portion cover of shell is equipped with the shock attenuation cover, be provided with location arch and positioning groove on the outside of shell and the hole of shock attenuation cover, the lower terminal surface of shock attenuation cover is provided with the protruding location jack catch that stretches downwards and block installation window both sides.

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