CN113530839A

CN113530839A - Water pump

Info

Publication number: CN113530839A
Application number: CN202010285265.6A
Authority: CN
Inventors: 陈业震; 陈淑君; 倪江卫; 江军
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2021-10-22

Abstract

The invention discloses a water pump, which comprises: the water pump comprises a shell, a water pump body and a motor body, wherein a pump water cavity and a motor cavity are defined in the shell, and the shell is provided with an inlet and an outlet which are communicated with the pump water cavity; the stator is arranged in the motor cavity and comprises a stator inner iron core, a stator outer iron core and a winding, the winding is wound on the stator inner iron core, and the stator outer iron core is assembled on the outer side of the stator inner iron core; the rotor is arranged in the motor cavity and is rotatably matched with the stator; the impeller is arranged in the pump water cavity and is in transmission connection with the rotor. The water pump has the advantages of high power, large output flow and the like.

Description

Water pump

Technical Field

The invention relates to the technical field of pump body equipment, in particular to a water pump.

Background

The water pump in the related art mainly comprises a shell, a motor, an impeller and other components, wherein a stator iron core of the motor is limited in specification of a winding due to the fact that the stator iron core is narrow in winding space due to the structure of the stator iron core, so that the output power of the water pump is insufficient, and when the water pump is applied to systems such as a thermal management system, the output requirement of large flow cannot be met.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a water pump having advantages of high power and large output flow.

To achieve the above object, there is provided a water pump according to an embodiment of the present invention, including: the water pump comprises a shell, a water pump body and a motor body, wherein a pump water cavity and a motor cavity are defined in the shell, and the shell is provided with an inlet and an outlet which are communicated with the pump water cavity; the stator is arranged in the motor cavity and comprises a stator inner iron core, a stator outer iron core and a winding, the winding is wound on the stator inner iron core, and the stator outer iron core is assembled on the outer side of the stator inner iron core; the rotor is arranged in the motor cavity and is rotatably matched with the stator; the impeller is arranged in the pump water cavity and is in transmission connection with the rotor.

The water pump provided by the embodiment of the invention has the advantages of high power, large output flow and the like.

According to some embodiments of the invention, the stator outer core is an interference fit with the stator inner core.

According to some embodiments of the invention, the wire diameter of the winding is 1.5mm to 2.12 mm.

According to some embodiments of the invention, the stator inner core includes: a yoke having a ring-shaped cross-section; a plurality of teeth connected to an outer circumferential surface of the yoke and provided at intervals in a circumferential direction of the yoke; the tooth shoulders are connected to one ends, far away from the yoke, of the tooth parts in a one-to-one correspondence mode; wherein the winding is wound around the plurality of teeth portions.

Further, the cross section of the stator outer core is annular, the stator outer core surrounds the outer sides of the plurality of tooth shoulders, a plurality of assembling grooves which are arranged along the circumferential direction of the inner circumferential surface of the stator outer core at intervals are formed in the inner circumferential surface of the stator outer core, and the plurality of tooth shoulders are matched with the plurality of assembling grooves in a one-to-one correspondence mode.

According to some specific embodiments of the present invention, the outer circumferential surface of the yoke is provided with a plurality of slots, each of which extends in the axial direction of the yoke and is located between two adjacent teeth; wherein a plurality of through holes are formed in each notch at intervals in the axial direction of the yoke, and each through hole penetrates through the yoke in the thickness direction of the yoke.

Further, the width of the notch is less than 0.6 mm.

According to some specific embodiments of the present invention, the stator inner core is formed by stacking and plastic-wrapping a plurality of punching sheets, and a part of the punching sheets are arranged in a broken manner in a circumferential direction of the stator inner core to form the through hole.

According to some specific embodiments of the invention, the rotor comprises: a rotor core; the rotating shaft penetrates through the rotor iron core and is in transmission connection with the impeller; the permanent magnets are arranged on the rotor core and are distributed along the circumferential direction of the rotor core; and the sealing sleeve coats the rotor core and the permanent magnet.

Furthermore, the outer peripheral surface of the rotor core is provided with a plurality of magnetic isolation bridges, each magnetic isolation bridge extends along the axial direction of the rotor core and corresponds to a part of the position between two adjacent permanent magnets, and the outer contour of the cross section of each magnetic isolation bridge is in a circular arc shape protruding towards the outer side of the rotor core.

According to some specific embodiments of the present invention, a first bearing chamber and a second bearing chamber are configured in the motor cavity, the first bearing chamber has a first bearing in an interference fit therein, the second bearing chamber has a second bearing in an interference fit therein, a central axis of the first bearing coincides with a central axis of the second bearing, and two ends of the rotating shaft are supported on the housing through the first bearing and the second bearing respectively.

Furthermore, the first bearing is adjacent to the impeller, an adjusting ring and a thrust block are sleeved at one end, facing the impeller, of the rotating shaft, the adjusting ring and the thrust block are located between the sealing sleeve and the first bearing along the axial stop of the rotating shaft, and the outer surface of the thrust block is a smooth surface.

According to some embodiments of the invention, the water pump further comprises: the controller is also limited in the shell and is arranged in the electric control cavity; the plug connector is electrically connected with the controller and is exposed out of the shell.

Further, the housing includes: a motor housing; the volute is mounted at one end of the motor shell and defines the pump water cavity together with the motor shell, and the inlet and the outlet are arranged on the volute; the motor end cover is arranged in the motor shell and divides the motor cavity and the electric control cavity in the motor shell; and the sealing cover is arranged at the other end of the motor shell and covers the electric control cavity in a sealing manner.

Furthermore, a clamping groove extending along the circumferential direction of the volute is formed in the inner circumferential surface of the volute, an elastic check ring is arranged in the clamping groove, and the volute is mounted at one end of the motor shell through the elastic check ring; a volute sealing ring is arranged between the inner peripheral surface of the volute and the outer peripheral surface of the motor shell; both ends of the elastic retainer ring are respectively provided with a dismounting hole; the peripheral face of motor casing is equipped with at least one spacing lug, the orientation of spiral case the terminal surface of motor casing is equipped with spacing breach, spacing lug cooperate in spacing breach.

According to some specific embodiments of the invention, the outer circumferential surface of the other end of the motor casing is provided with a ring edge extending along the circumferential direction of the motor casing, and the outer circumferential edge of the sealing cover is configured with a flange wrapping the ring edge.

According to some embodiments of the invention, a sealant is filled between the sealing cover and the motor casing.

According to some embodiments of the present invention, the controller is mounted on the motor end cover through a threaded fastener and/or a heat conducting adhesive, a mounting protrusion is disposed on a side wall of the motor casing, the plug connector is mounted on a surface of the mounting protrusion, the surface of the plug connector faces away from the motor casing and penetrates through the mounting protrusion, and an electrically controlled sealing ring is disposed between the plug connector and the mounting protrusion.

According to some specific embodiments of the present invention, the inner circumferential surface of the motor casing is provided with a glue groove extending along a circumferential direction thereof, and the glue groove is filled with fixing glue adhered to the stator outer core.

According to some embodiments of the invention, the stator outer core is in interference fit with the motor casing; the outer peripheral face of the outer iron core of stator is equipped with at least one spacing groove, the spacing groove is followed the axis of the outer iron core of stator extends, the stator passes through the bellied cooperation on spacing groove and the frock sleeve and with motor casing circumference location.

According to some embodiments of the invention, the water pump further comprises: the motor casing is provided with at least one circulation hole, the circulation hole is communicated with the pump water cavity and the rotor in the motor cavity, the waterproof casing is arranged between the rotor and the stator, and two ends of the waterproof casing are respectively connected with the motor casing in a sealing mode through waterproof sealing rings.

Furthermore, the waterproof shell is provided with an inverted buckle, the stator is provided with a buckle groove, and the inverted buckle is clamped in the buckle groove;

the waterproof shell is provided with a stator outlet hole, and the cross sectional area of the stator outlet hole is gradually increased towards the direction of the stator; the waterproof case is provided with an angle positioning protrusion, the stator is provided with an angle positioning groove, and the angle positioning protrusion is matched with the angle positioning groove.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of a water pump according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a water pump according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a waterproof case of a water pump according to an embodiment of the invention from different perspectives;

FIG. 4 is a schematic structural diagram of a stator inner core and a stator outer core of a water pump according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a rotor of a water pump according to an embodiment of the present invention;

FIG. 6 is a schematic view of the internal structure of a rotor of a water pump according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a motor housing of a water pump according to an embodiment of the invention;

FIG. 8 is a cross-sectional view of a volute of a water pump according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a seal cover and a motor casing of a water pump according to an embodiment of the invention;

fig. 10 is a schematic structural view of a circlip of a water pump according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a stator of a water pump according to an embodiment of the present invention;

fig. 12 is a schematic structural view of a volute of a water pump according to an embodiment of the present invention.

Reference numerals:

a water pump 1,

A shell 100,

A pump water cavity 110, a motor cavity 120, an inlet 130, an outlet 140, an electric control cavity 150,

A first bearing 121, a second bearing 122,

A motor casing 160, a volute 170, a motor end cover 180, a sealing cover 190, a clamping groove 171, an elastic retainer ring 172,

A volute sealing ring 173, a dismounting hole 174, a limit lug 101, a limit notch 175, a ring edge 102, a flange 191,

A waterproof shell 10, a circulation hole 11, a waterproof sealing ring 12, an inverted buckle 13, a stator outlet hole 14, an angle positioning bulge 15,

Mounting lug 161, electronic control sealing ring 162, rubber groove 163,

A stator 200,

Stator inner core 211, stator outer core 212, winding 220,

Yoke portion 201, tooth portion 202, tooth shoulder 203, fitting groove 204, notch 205, through hole 206, and,

A limit groove 208, a buckle groove 209, an angle positioning groove 20,

Rotor 300, rotor core 310, rotating shaft 320, permanent magnet 330, sealing sleeve 340, magnetic isolation bridge 311,

An adjusting ring 321, a thrust block 322,

An impeller 400,

Controller 500, plug 510.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more, and "several" means one or more.

A water pump 1 according to an embodiment of the present invention is described below with reference to the drawings.

As shown in fig. 1 to 12, a water pump 1 according to an embodiment of the present invention includes a housing 100, a stator 200, a rotor 300, and an impeller 400.

The housing 100 defines a pump water chamber 110 and a motor chamber 120 therein, and the housing 100 is provided with an inlet 130 and an outlet 140 communicating with the pump water chamber 110. The stator 200 is disposed in the motor cavity 120, the stator 200 includes a stator inner core 211, a stator outer core 212, and a winding 220,

the winding 220 is wound around the stator inner core 211, and the stator outer core 212 is fitted to the outside of the stator inner core 211. The rotor 300 is provided in the motor cavity 120 and rotatably coupled to the stator 200. The impeller 400 is disposed in the pumping water chamber 110 and is in driving connection with the rotor 300.

For example, as shown in fig. 1, the housing 100 may be in the shape of a rotating body, the inlet 130 and the outlet 140 are disposed at the same end of the housing 100, the impeller 400 is disposed adjacent to a position between the inlet 130 and the outlet 140, and the impeller 400 is driven by the rotor 300 to rotate, thereby drawing fluid such as water out of the inlet 130 and sending the fluid out of the outlet 140.

According to the water pump 1 of the embodiment of the invention, the stator iron core is provided with the stator inner iron core 211 and the stator outer iron core 212 which are separately arranged, so that the winding 220 can be wound on the stator inner iron core 211 firstly, the winding space of the winding 220 is large due to the fact that the stator outer iron core 212 is installed outside, the winding of the winding 220 with a large diameter can be met, and the stator outer iron core 212 is assembled after the winding 220 is wound to form the complete stator iron core, so that a motor adopting the stator iron core has larger output power, the driving force on the impeller 400 is effectively improved, and the pumping capacity is improved.

Therefore, the water pump 1 according to the embodiment of the invention has the advantages of high power and large output flow.

In some embodiments of the present invention, as shown in fig. 4, the stator outer core 212 is interference fitted with the stator inner core 211.

The stator outer iron core 212 and the stator inner iron core 211 are connected more stably, and can not move mutually, so that the stable operation of the stator 200 is more facilitated, the size of the stator 200 is reduced, the miniaturization of the water pump 1 is guaranteed, and the 400W high power can be output.

In some embodiments of the present invention, the wire diameter of the winding 220 is 1.5mm to 2.12mm, i.e., the diameter of the enameled wire of the winding 220 is 1.5mm to 2.12 mm.

The winding 220 with a larger diameter is selected to meet the requirement that the winding 220 can pass larger current under high-power output so as to output larger power, for example, the winding 220 in the embodiment of the invention can be applied to a 12V system and can output 300W-400W of power to the maximum, and the output power of the water pump 1 is improved by adopting the winding 220 with the diameter of 1.5 mm-2.12 mm. In some embodiments of the present invention, as shown in fig. 4, the stator inner core 211 includes a yoke portion 201, a plurality of tooth portions 202, and a plurality of tooth shoulders 203.

The yoke 201 is annular in cross-section. The plurality of tooth portions 202 are connected to the outer circumferential surface of the yoke 201 and arranged at equal intervals in the circumferential direction of the yoke 201. The plurality of tooth shoulders 203 are connected to one end of the plurality of tooth portions 202 away from the yoke 201 in a one-to-one correspondence. Wherein the winding 220 is wound around the plurality of teeth 202.

Accordingly, the stator core 211 can be wound with more windings 220, and thus can output higher power. The winding 220 can be formed by winding the winding 220 around the tooth portions 202, and the plurality of tooth portions 202 are provided corresponding to the plurality of tooth shoulders 203. The stop provided by the yoke 201 and the tooth shoulders 203 provides a location for the windings 220 so that the windings 220 do not disengage from the stator core 211.

Further, the cross section of the stator outer core 212 is annular, as shown in fig. 4, the stator outer core 212 surrounds the outer sides of the plurality of tooth shoulders 203, the inner circumferential surface of the stator outer core 212 is provided with a plurality of fitting grooves 204 arranged at equal intervals along the circumferential direction thereof, and the plurality of tooth shoulders 203 are fitted to the plurality of fitting grooves 204 in one-to-one correspondence.

The stator inner core 211 can be assembled inside the stator outer core 212, and the corresponding arrangement of the tooth shoulder 203 and the assembling groove 204 prevents the stator inner core 211 and the stator outer core 212 from rotating with each other, so that the assembling stability of the stator 200 is improved. And the stator inner core 211 and the rotor inner core have detachability to facilitate winding the winding 220.

In addition, when the stator outer core 212 is assembled, the adjacent teeth 202 of the stator inner core 211 pass through the gaps between the shoulders 203 to form a relatively open structure so as to wind the winding 220 having a large diameter. After winding of the winding 220 is completed, the relatively open structure is closed by the stator outer core 212 to ensure stability of the winding 220.

In some embodiments of the present invention, as shown in fig. 4, the outer circumferential surface of the yoke 201 is provided with a plurality of slots 205, and each slot 205 extends in the axial direction of the yoke 201 and is located between two adjacent teeth 202. A plurality of through holes 206 are formed in each notch 205 at intervals in the axial direction of the yoke 201, and each through hole 206 penetrates the yoke 201 in the thickness direction of the yoke 201. Thus, the performance and efficiency of the motor are ensured, and the structural strength of the motor is ensured under the condition that the manufacturing process can be realized. Wherein the width of the notch 205 is less than 0.6 mm.

In some embodiments of the present invention, as shown in fig. 4, the stator core 211 is formed by stacking and overmolding a plurality of stamped sheets, and a part of the stamped sheets is cut off in the circumferential direction of the stator core 211 to form the through hole 206.

Specifically, the punching sheets of the stator inner core 211 comprise two punching sheets, one punching sheet is in an integral ring shape, the other punching sheet is circumferentially disconnected, the two punching sheets are alternately arranged, the disconnected punching sheets form the through hole 206, then the punching sheets are riveted together, and finally plastic is coated through an injection mold, so that the punching sheets can be used as an insulating coating layer of the winding 220, the mechanical strength is increased, and the deformation is avoided.

For example, the stator inner core 211 may include 6 punched pieces, and each through hole 206 is formed by 5 broken punched pieces. The stator 200 may have an outer diameter of 78mm, an inner diameter of 39mm, and an axial height of 30.5mm, and the motor has an output of 400W.

In some embodiments of the present invention, as shown in fig. 5 and 6, the rotor 300 includes a rotor core 310, a rotating shaft 320, a plurality of permanent magnets 330, and a gland 340.

The rotating shaft 320 penetrates through the rotor core 310 and is in transmission connection with the impeller 400. A plurality of permanent magnets 330 are provided in rotor core 310 and arranged along the circumferential direction of rotor core 310.

Specifically, the outer diameter of rotor core 310 may be 35.4mm, the axial height may be 30.5mm, and rotor core 310 and permanent magnet 330 may be assembled by interference fit, so as to ensure that permanent magnet 330 does not separate from rotor core 310 due to rotation of rotor 300. The permanent magnets 330 may be four and uniformly arranged in the circumferential direction of the rotor core 310. A gland 340 encapsulates the rotor core 310 and the permanent magnet 330. The material of seal cover 340 can be stainless steel, and through the mode of laser welding, weld in rotor core 310 periphery, make rotor core 310 and permanent magnet 330 sealed to prevent that the medium from entering into in rotor core 310 and the permanent magnet 330, protection rotor core 310 and permanent magnet 330 do not receive the corrosion, guarantee that the magnetic property of rotor 300 meets the demands.

For convenience of assembly, the sealing sleeve 340 has a separate structure, and includes a portion that is wrapped around the rotor core 310 in the circumferential direction and portions that are wrapped around both end surfaces of the rotor core 310.

Further, as shown in fig. 5, the outer circumferential surface of the rotor core 310 is configured with a plurality of magnetic isolation bridges 311, each magnetic isolation bridge 311 extends along the axial direction of the rotor core 310 and corresponds to a part between two adjacent permanent magnets 330, the outer contour of the cross section of the magnetic isolation bridge 311 is a circular arc protruding to the outside of the rotor core 310, for example, the outer contour of the cross section of the magnetic isolation bridge 311 is a 1/4 semicircular structure, and thus, the width of the magnetic isolation bridge 311 has a small size under the condition of satisfying the process production conditions, and the magnetic leakage of the rotor 300 can be reduced, the utilization rate of the permanent magnets 330 can be improved, and the magnetic performance of the rotor 300 can be improved.

In some embodiments of the present invention, as shown in fig. 2, a first bearing chamber (not shown) and a second bearing chamber (not shown) are configured in the motor cavity 120, the first bearing chamber has a first bearing 121 in an interference fit manner, the second bearing chamber has a second bearing 122 in an interference fit manner, a central axis of the first bearing 121 coincides with a central axis of the second bearing 122, and two ends of the rotating shaft 320 are respectively supported on the housing 100 through the first bearing 121 and the second bearing 122.

The first bearing 121 and the second bearing 122 may be graphite bearings. The specific assembly process of the first bearing 121 and the second bearing 122 is as follows:

the housing 100 is heated and baked, and then the first bearing 121 and the second bearing 122 are assembled to the first bearing chamber and the second bearing chamber, respectively, using the principle of expansion with heat and contraction with cold. The concentricity of the first and

second bearings

121 and 122 at both ends of the rotation shaft 320 is sufficiently secured by the interference fit with the housing 100, so that the rotor 300 is completely centered. The first bearing 121 and the second bearing 122 provide smoother and more stable rotation of the rotating shaft 320.

Further, as shown in fig. 2, the first bearing 121 is disposed adjacent to the impeller 400, an end of the rotating shaft 320 facing the impeller 400 is sleeved with an adjusting ring 321 and a thrust block 322, the adjusting ring 321 and the thrust block 322 are stopped between the sealing sleeve 340 and the first bearing 121 along an axial direction of the rotating shaft 320, and an outer surface of the thrust block 322 is a smooth surface.

For example, the thrust block 322 may be ceramic, smooth surfaced, and fit snugly within the adjustment ring 321 with less friction. The thrust block 322 is in contact with the end face of the first bearing 121, and since the thrust block 322 is a smooth ceramic plane, the friction between the thrust block 322 and the first bearing 121 does not generate noise when the rotor 300 rotates. The adjusting ring 321 may be a silicone rubber material that is interference fitted on an end surface of the rotor 300 and rotates with the rotor 300. Therefore, no gap exists among the rotor 300, the adjusting ring 321, the thrust block 322 and the first bearing 121, the stability of the rotor 300 in rotation is ensured, and the axial movement of the rotor 300 is avoided.

In some embodiments of the present invention, as shown in fig. 7, the water pump 1 further includes a controller 500 and a plug 510.

An electronic control chamber 150 is further defined in the housing 100, and a controller 500 is mounted in the electronic control chamber 150 for controlling the normal operation of the water pump 1. The plug member 510 is electrically connected to the controller 500, for example, the plug member 510 may be connected to the terminal of the controller 500 by resistance welding, which ensures good welding strength of the plug member 510, and the plug member 510 is exposed from the housing 100, thereby facilitating external line connection.

Further, as shown in fig. 2, 8 and 9, the housing 100 includes a motor case 160, a scroll case 170, a motor end cover 180 and a sealing cover 190.

The volute 170 is mounted at one end of the motor housing 160 and defines the pump water chamber 110 together with the motor housing 160, and the inlet 130 and the outlet 140 are provided at the volute 170. The motor end cover 180 is disposed in the motor casing 160 and separates the motor cavity 120 and the electrical control cavity 150 in the motor casing 160. Therefore, different cavities are formed in the shell 100 to correspondingly install corresponding functional components, mutual interference among the components is avoided, it is ensured that fluid such as water cannot flow to the electric control cavity 150, short circuit is avoided, and safety of the water pump 1 is improved. The sealing cover 190 is installed at the other end of the motor case 160 and covers the electric control chamber 150. The electric control chamber 150 has a space for accommodating and installing the controller 500, so that the controller 500 is stably maintained in the electric control chamber 150, and further, stable electric connection is maintained.

Further, as shown in fig. 2 and 10, an inner circumferential surface of the volute 170 is provided with a locking groove 171 extending along a circumferential direction thereof, a resilient ring 172 is provided in the locking groove 171, and the volute 170 is mounted on one end of the motor casing 160 through the resilient ring 172.

The clamping groove 171 provides an installation space for the elastic retainer ring 172, the elastic retainer ring 172 stops at one end of the motor casing 160, the installation of the motor casing 160 and the volute 170 is achieved, the elastic retainer ring 172 is utilized to be assembled and fixed, compared with the prior art adopting bolt connection, the screw hole site structural design of the motor casing 160 and the volute 170 is reduced, the size of the water pump 1 is reduced, and the installation of the water pump 1 in a narrow space is facilitated.

A volute sealing ring 173 is disposed between an inner circumferential surface of the volute 170 and an outer circumferential surface of the motor casing 160 to enhance the sealing between the motor casing 160 and the volute 170, and prevent fluid such as water from leaking.

In some embodiments of the present invention, as shown in fig. 10, the elastic collar 172 has a mounting hole 174 at each end. So, utilize tools such as jump ring pincers to press from both sides tight circlip 172 and can carry out dismouting spiral case 170, it is more convenient to dismantle.

In some embodiments of the present invention, as shown in fig. 2, 7 and 12, at least one limiting protrusion 101 is disposed on the outer circumferential surface of the motor casing 160, a limiting notch 175 is disposed on the end surface of the volute 170 facing the motor casing 160, and the limiting protrusion 101 fits in the limiting notch 175. Therefore, through the matching assembly of the limiting convex blocks 101 and the limiting notches 175, the motor casing 160 and the volute 170 can be circumferentially limited, and relative rotation between the motor casing 160 and the volute is avoided.

In some embodiments of the present invention, as shown in fig. 2 and 9, the outer circumferential surface of the other end of the motor casing 160 is provided with a ring edge 102 extending along the circumferential direction thereof, the outer circumferential edge of the sealing cover 190 is configured with a flange 191, and the flange 191 wraps the ring edge 102. Through the assembly of turn-ups 191 and ring edge 102, need not set up the screw and can guarantee the assembly of motor casing 160 and sealed lid 190, reduced the spatial structure design of spare part screw hole site, reduced the volume of water pump 1.

Further, a sealant, for example, a sealing silica gel, is filled between the sealing cover 190 and the motor casing 160, so that the sealing cover 190 and the motor casing 160 are completely sealed, external dust and liquid are prevented from entering and contacting the controller 500, and the safe and reliable operation of the whole water pump 1 is ensured.

In some embodiments of the present invention, as shown in fig. 7, the controller 500 is mounted to the motor end cover 180 by a threaded fastener and/or a thermal conductive adhesive, a mounting protrusion 161 is disposed on a side wall of the motor casing 160, the plug 510 is mounted on a surface of the mounting protrusion 161 facing away from the motor casing 160 and penetrates through the mounting protrusion 161 to be electrically connected to the controller 500, and an electrically controlled sealing ring 162 is disposed between the plug 510 and the mounting protrusion 161.

For example, the motor end cover 180 and the motor casing 160 may be sealed by a sealing ring, the controller 500 is mounted on the motor end cover 180 by using a threaded fastener, and the controller 500 is fixed on the motor end cover 180 by using a heat-conducting adhesive, so that stable connection between the controller 500 and the motor end cover 180 is ensured, and effective heat dissipation is formed. The mounting bumps 161 provide a mounting carrier for the plug 510, allowing the controller 500 to be in electrical communication with the plug 510. And is beneficial to the operation of the plug-in unit 510 by the operator, thereby improving the stability of the plug-in unit 510. The electronic control seal ring 162 ensures the sealing between the plug 510 and the mounting protrusion 161, preventing external liquid from entering the electronic control chamber 150.

In some embodiments of the present invention, the inner circumferential surface of the motor case 160 is provided with a glue groove 163 extending along the circumferential direction thereof, and the glue groove 163 is filled with a fixing glue adhered to the stator outer core 212. The motor casing 160 is bonded and fixed with the stator outer core 212 to assist in firmly fixing the stator 200, and ensure that the stator 200 meets certain vibration resistance requirements.

In some embodiments of the present invention, as shown in fig. 2, the stator outer core 212 is in interference fit with the motor casing 160, so that the stator outer core 212 and the motor casing 160 do not rotate and the same axis is ensured. The outer circumferential surface of the stator outer core 212 is provided with at least one limiting groove 208, the limiting groove 208 extends along the axis of the stator outer core 212, and the stator 200 is circumferentially positioned with the motor casing 160 through the matching of the limiting groove 208 and the protrusion on the tooling sleeve.

For example, the number of the limiting grooves 208 provided in the stator 200 may be two, a tool sleeve with a protrusion is first installed on the motor casing 160, the stator 200 is then installed in the tool sleeve, the limiting grooves 208 correspond to the protrusions, and the stator 200 is installed on the motor casing 160 by using the tool sleeve, so that the installation direction of the stator 200 in the circumferential direction of the motor casing 160 is unique. The housing 100 is heated and baked, the stator 200 is easily pressed by expansion with heat and contraction with cold of the housing 100, and the tooling sleeve can be drawn out after the pressing is completed.

In some embodiments of the invention, as shown in fig. 2 and 3, the water pump 1 further comprises a waterproof case 10.

The motor casing 160 is provided with at least one circulation hole 11, the circulation hole 11 communicates the pump water cavity 110 with the rotor 300 in the motor cavity 120, the waterproof casing 10 is arranged between the rotor 300 and the stator 200, and two ends of the waterproof casing 10 are respectively connected with the motor casing 160 through waterproof sealing rings 12 in a sealing manner.

Specifically, the motor casing 160 may have three circulation holes 11, the circulation holes 11 correspond to the position of the rotor 300, so that the fluid such as water in the pump water cavity 110 is driven by the impeller 400 to contact with the rotor 300 for heat exchange, and the heat generated by the controller 500 may also be transferred to the fluid such as water at the rotor 300 through the motor end cover 180, so as to transfer the heat through the continuous circulation of the fluid such as water, thereby sufficiently dissipating the heat of the water pump. Further, the waterproof case 10 and the waterproof seal ring 12 seal each other, thereby preventing a medium such as water from coming into contact with the stator 200.

Further, as shown in fig. 3 and 4, the waterproof case 10 is provided with the reverse buckles 13, the stator 200 is provided with the fastening grooves 209, and the fastening grooves 209 may be provided on the plastic-coated material of the stator 200, for example, the reverse buckles 13 are provided in plurality at intervals in the circumferential direction of the waterproof case 10, the fastening grooves 209 are provided in plurality at intervals in the circumferential direction of the stator 200, and the plurality of reverse buckles 13 are engaged with the plurality of fastening grooves 209 in one-to-one correspondence. Thus, it is ensured that the waterproof case 10 is not flicked in the axial direction by the elastic force of the waterproof seal ring 12, thereby ensuring the sealing property and the mounting reliability of the waterproof case 10.

In some embodiments of the present invention, as shown in fig. 3, the waterproof case 10 is provided with a stator outlet hole 14, and the cross-sectional area of the stator outlet hole 14 is gradually increased toward the stator 200. For example, the number of the stator outlet holes 14 may be three, so as to correspond to the extraction of the three-phase wire harness, and the stator outlet holes 14 are configured to have a large chamfer structure with a cross-sectional area gradually increasing toward the stator 200, so that in the case of uneven three-phase wire harness, the three-phase wire harness can be corrected, and the wire harness can more easily pass through the stator outlet holes 14.

In some embodiments of the present invention, as shown in fig. 3 and 11, the waterproof case 10 is provided with an angle positioning protrusion 15, the stator 200 is provided with an angle positioning groove 20, and the angle positioning protrusion 15 is fitted to the angle positioning groove 20. Therefore, the circumferential relative positions of the waterproof case 10 and the stator 200 are fixed, and the stator outlet hole 14 on the waterproof case 10 is ensured to correspond to the appearance position of the three-phase line, so that the three-phase line and the controller 500 are reliably assembled.

Other constructions and operations of the water pump 1 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of "a particular embodiment," "a particular example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A water pump, comprising:

the water pump comprises a shell, a water pump body and a motor body, wherein a pump water cavity and a motor cavity are defined in the shell, and the shell is provided with an inlet and an outlet which are communicated with the pump water cavity;

the stator is arranged in the motor cavity and comprises a stator inner iron core, a stator outer iron core and a winding, the winding is wound on the stator inner iron core, and the stator outer iron core is assembled on the outer side of the stator inner iron core;

the rotor is arranged in the motor cavity and is rotatably matched with the stator;

the impeller is arranged in the pump water cavity and is in transmission connection with the rotor.

2. The water pump of claim 1, wherein the stator inner core comprises:

a yoke having a ring-shaped cross-section;

a plurality of teeth connected to an outer circumferential surface of the yoke and provided at intervals in a circumferential direction of the yoke;

the tooth shoulders are connected to one ends, far away from the yoke, of the tooth parts in a one-to-one correspondence mode;

wherein the winding is wound around the plurality of teeth portions.

3. The water pump according to claim 2, wherein the stator outer core has a ring-shaped cross section, the stator outer core surrounds the outside of the plurality of tooth shoulders, an inner circumferential surface of the stator outer core is provided with a plurality of fitting grooves arranged at intervals along a circumferential direction thereof, and the plurality of tooth shoulders are fitted to the plurality of fitting grooves in a one-to-one correspondence.

4. The water pump according to claim 2, wherein the outer circumferential surface of the yoke is provided with a plurality of notches, each of which extends in the axial direction of the yoke and is located between two adjacent teeth;

wherein a plurality of through holes are formed in each notch at intervals in the axial direction of the yoke, and each through hole penetrates through the yoke in the thickness direction of the yoke.

5. The water pump according to claim 4, wherein the stator inner core is formed by overlapping and plastic-coating a plurality of punching sheets, and part of the punching sheets are arranged in a breaking manner in the circumferential direction of the stator inner core to form the through hole.

6. The water pump of claim 1, wherein the rotor comprises:

a rotor core;

the rotating shaft penetrates through the rotor iron core and is in transmission connection with the impeller;

the permanent magnets are arranged on the rotor core and are distributed along the circumferential direction of the rotor core;

and the sealing sleeve coats the rotor core and the permanent magnet.

7. The water pump according to claim 6, wherein the outer circumferential surface of the rotor core is configured with a plurality of magnetic isolation bridges, each magnetic isolation bridge extends along the axial direction of the rotor core and corresponds to a part between two adjacent permanent magnets, and the outer contour of the cross section of each magnetic isolation bridge is in the shape of a circular arc protruding towards the outer side of the rotor core.

8. The water pump according to claim 6, wherein a first bearing chamber and a second bearing chamber are formed in the motor cavity, a first bearing is arranged in the first bearing chamber in an interference fit mode, a second bearing is arranged in the second bearing chamber in an interference fit mode, a central axis of the first bearing coincides with a central axis of the second bearing, and two ends of the rotating shaft are supported on the shell through the first bearing and the second bearing respectively.

9. The water pump of claim 8, wherein the first bearing is disposed adjacent to the impeller, an end of the rotating shaft facing the impeller is sleeved with an adjusting ring and a thrust block, the adjusting ring and the thrust block are stopped between the sealing sleeve and the first bearing along an axial direction of the rotating shaft, and an outer surface of the thrust block is smooth.

10. The water pump of claim 1, further comprising:

the controller is also limited in the shell and is arranged in the electric control cavity;

the plug connector is electrically connected with the controller and is exposed out of the shell.

11. The water pump of claim 10, wherein the housing comprises:

a motor housing;

the volute is mounted at one end of the motor shell and defines the pump water cavity together with the motor shell, and the inlet and the outlet are arranged on the volute;

the motor end cover is arranged in the motor shell and divides the motor cavity and the electric control cavity in the motor shell;

and the sealing cover is arranged at the other end of the motor shell and covers the electric control cavity in a sealing manner.

12. The water pump according to claim 11, wherein a clamping groove extending along a circumferential direction of the inner circumferential surface of the volute is formed in the inner circumferential surface of the volute, a circlip is arranged in the clamping groove, and the volute is mounted at the one end of the motor casing through the circlip;

a volute sealing ring is arranged between the inner peripheral surface of the volute and the outer peripheral surface of the motor shell;

both ends of the elastic retainer ring are respectively provided with a dismounting hole;

the peripheral face of motor casing is equipped with at least one spacing lug, the orientation of spiral case the terminal surface of motor casing is equipped with spacing breach, spacing lug cooperate in spacing breach.

13. The water pump of claim 11, wherein the outer peripheral surface of the other end of the motor casing is provided with a ring edge extending along the circumferential direction of the motor casing, and the outer peripheral edge of the sealing cover is provided with a flange wrapping the ring edge.

14. The water pump of claim 11, wherein the controller is mounted to the motor end cap by a threaded fastener and/or a thermally conductive adhesive, a mounting protrusion is disposed on a side wall of the motor housing, the plug is mounted to a surface of the mounting protrusion facing away from the motor housing and penetrating through the mounting protrusion, and an electrically controlled sealing ring is disposed between the plug and the mounting protrusion.

15. The water pump of claim 11, wherein the stator outer core is in interference fit with the motor casing;

the outer peripheral face of the outer iron core of stator is equipped with at least one spacing groove, the spacing groove is followed the axis of the outer iron core of stator extends, the stator passes through the bellied cooperation on spacing groove and the frock sleeve and with motor casing circumference location.

16. The water pump of claim 11, further comprising:

the motor casing is provided with at least one circulation hole, the circulation hole is communicated with the pump water cavity and the rotor in the motor cavity, the waterproof casing is arranged between the rotor and the stator, and two ends of the waterproof casing are respectively connected with the motor casing in a sealing mode through waterproof sealing rings.

17. The water pump of claim 16, wherein the waterproof case is provided with an inverted buckle, the stator is provided with a buckle groove, and the inverted buckle is clamped in the buckle groove;

the waterproof shell is provided with a stator outlet hole, and the cross sectional area of the stator outlet hole is gradually increased towards the direction of the stator;

the waterproof case is provided with an angle positioning protrusion, the stator is provided with an angle positioning groove, and the angle positioning protrusion is matched with the angle positioning groove.