CN220775486U

CN220775486U - DC fan motor

Info

Publication number: CN220775486U
Application number: CN202322491954.4U
Authority: CN
Inventors: 孙折折; 赵延军; 杨豪
Original assignee: Xinxiang Hengrun Electromechanical Co ltd
Current assignee: Xinxiang Hengrun Electromechanical Co ltd
Priority date: 2023-09-12
Filing date: 2023-09-12
Publication date: 2024-04-12
Anticipated expiration: 2033-09-12

Abstract

The application relates to a direct current fan motor, its characterized in that includes: a housing, a stator core, and a rotor assembly; the shell is sleeved on the outer side of the stator core; the rotor assembly includes: rotor punching, rotating shaft and magnetic steel; the stator core is sleeved on the outer side of the rotor punching sheet; the rotor punching sheet is sleeved on the outer side of the rotating shaft, and the magnetic steel is embedded into the rotor punching sheet; the shell is provided with a heat dissipation water channel, and the outer side wall of the shell is provided with a water inlet and a water outlet; the water inlet is communicated with the water outlet through a heat dissipation water channel. The magnetic steel is directly placed inside the rotor punching sheet, so that the strength of the rotor assembly is improved, the magnetic steel is not easy to deform, the magnetic steel has good dynamic performance, and compared with a mode of magnetic steel pasting, the magnetic steel pasting structure has the advantages of high installation stability, small assembly difficulty, reduction of technological steps of pasting, glue dispensing and the like, improvement of production efficiency, larger generated torque and inductance and capability of improving the power density of a motor.

Description

DC fan motor

Technical Field

The application relates to the field of motors, in particular to a direct current fan motor.

Background

The permanent magnet brushless motor mainly comprises a rotor made of permanent magnets, a stator made of a plurality of pairs of coil windings and an induction control circuit, wherein the induction control circuit replaces the brush and commutator structure of the traditional brush motor, the service life of the motor is longer, the noise is lower, and the efficiency is higher. The rotor assembly of the permanent magnet motor comprises a rotor punching sheet and magnetic steel, wherein in the prior art, the magnetic steel is fixed on the surface of the rotor punching sheet in a pasting mode, and the novel oilfield oil pumping half direct-drive permanent magnet synchronous motor with the publication number of CN213585330U can be referred to, but the fixing mode has the potential defect that the magnetic steel is not firmly pasted and thrown away during high-speed operation, so that the stability of a generator is affected.

Disclosure of Invention

In view of this, the present application provides a dc fan motor, which is suitable for improving the installation stability of the magnetic steel, so as to avoid being thrown off during high-speed operation.

According to an aspect of the present application, there is provided a direct current fan motor, including: a housing, a stator core, and a rotor assembly;

the shell is sleeved on the outer side of the stator core;

the rotor assembly includes: rotor punching, rotating shaft and magnetic steel; the stator core is sleeved on the outer side of the rotor punching sheet; the rotor punching sheet is sleeved on the outer side of the rotating shaft, and the magnetic steel is embedded into the rotor punching sheet;

the shell is provided with a heat dissipation water channel, and the outer side wall of the shell is provided with a water inlet and a water outlet; the water inlet is communicated with the water outlet through a heat dissipation water channel.

In one possible implementation, the rotor sheet is provided with magnetic steel grooves,

the magnetic steel groove is matched with the magnetic steel, and the magnetic steel groove is detachably connected with the magnetic steel.

In one possible implementation, the magnetic steel groove is provided with more than two magnetic steel grooves; more than two magnetic steel grooves are arranged on the rotor punching sheet in a circumferential arrangement.

In one possible implementation, the rotor assembly is provided with: a rotor baffle;

the rotor baffle is provided with two, and two rotor baffles are respectively fixed on two sides of the rotor punching sheet.

In one possible implementation, the rotor assembly is further provided with: a bracket;

the support is arranged between the rotor punching sheet and the rotating shaft.

In one possible implementation, the rotor assembly is further provided with: a first bearing and a second bearing;

the first bearing and the second bearing are sleeved on the rotating shaft;

the first bearing and the second bearing are respectively arranged on two opposite sides of the bracket.

In one possible implementation, the method further includes: a first end cap and a second end cap;

the first end cover and the second end cover are respectively arranged at two opposite ends of the shell.

In one possible implementation, the housing includes: an outer shell and an inner shell;

the outer shell is tightly sleeved on the outer side wall of the inner shell.

In one possible implementation, the heat sink channel is helically open on the outer side wall of the inner shell.

In one possible implementation, the water inlet is provided with a water inlet joint and the water outlet is provided with a water outlet joint.

The beneficial effects are that: the magnetic steel is directly placed inside the rotor punching sheet, so that the strength of the rotor assembly is improved, the magnetic steel is not easy to deform, the magnetic steel has good dynamic performance, and compared with a mode of magnetic steel pasting, the magnetic steel pasting structure has the advantages of high installation stability, small assembly difficulty, reduction of technological steps of pasting, glue dispensing and the like, improvement of production efficiency, larger generated torque and inductance and capability of improving the power density of a motor. The cooling liquid flows into the heat dissipation water channel through the water inlet, flows on the shell fully through the heat dissipation water channel, and flows out of the heat dissipation water channel from the water outlet to form cooling circulation, so that the components in the shell are cooled, and the working stability of the components is ensured. The application has the characteristics of high size/power ratio, strong stability, high temperature resistance and impact resistance, can still work stably under the conditions of high temperature, high humidity, sand dust, impact, vibration and the like.

Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features and aspects of the present application and together with the description, serve to explain the principles of the present application.

Fig. 1 shows a main body structure diagram of a direct current fan motor according to an embodiment of the present application;

fig. 2 shows a schematic exploded view of a dc fan motor according to an embodiment of the present application;

fig. 3 shows a cross-sectional view of a dc fan motor according to an embodiment of the present application;

FIG. 4 illustrates a structural exploded schematic view of a rotor assembly of an embodiment of the present application;

FIG. 5 shows a schematic exploded view of the structure of a housing of an embodiment of the present application;

FIG. 6 illustrates a structural exploded schematic view of a first end cap according to an embodiment of the present application;

FIG. 7 illustrates a block diagram of a second end cap of an embodiment of the present application;

fig. 8 shows six views of a direct current fan motor according to an embodiment of the present application.

Detailed Description

Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

It should be understood, however, that the terms "center," "longitudinal," "transverse," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the utility model or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

In addition, numerous specific details are set forth in the following detailed description in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements, and circuits have not been described in detail as not to unnecessarily obscure the present application.

Fig. 1 shows a main body structure diagram of a direct current fan motor according to an embodiment of the present application; fig. 2 shows a schematic exploded view of a dc fan motor according to an embodiment of the present application; FIG. 3 illustrates a cross-sectional view of a DC fan motor according to an embodiment of the present disclosure; FIG. 4 illustrates a structural exploded schematic view of a rotor assembly 200 of an embodiment of the present application; fig. 5 shows a schematic exploded view of the structure of the housing 100 according to the embodiment of the present application; FIG. 6 illustrates a structural exploded schematic view of a first end cap 300 of an embodiment of the present application; FIG. 7 illustrates a block diagram of a second end cap 400 of an embodiment of the present application; fig. 8 shows six views of a direct current fan motor according to an embodiment of the present application. As shown in fig. 1, the dc fan motor includes: comprising the following steps: a housing 100, a stator core 500, and a rotor assembly 200; the casing 100 is sleeved outside the stator core 500; the rotor assembly 200 includes: rotor punching 210, rotating shaft 230 and magnetic steel 220; the stator core 500 is sleeved outside the rotor punching sheet 210; the rotor punching sheet 210 is sleeved on the outer side of the rotating shaft 230, and the magnetic steel 220 is embedded into the rotor punching sheet 210; a heat dissipation water channel 123 is arranged in the cavity of the shell 100, and a water inlet 122 and a water outlet 121 are arranged on the outer side wall of the shell 100; the water inlet 122 is communicated with the water outlet 121 through a heat dissipation water channel 123.

The application is applicable to driving fans to rotate. It should be noted that, the casing 100 may fix the stator core 500, protect and isolate the internal rotor assembly 200 and the stator core 500, prevent the external interference to the normal operation of the motor, prolong the service life of the overall structure, and the stator core 500 is suitable for generating a rotating magnetic field, and the main function of the rotor assembly 200 is to be cut by magnetic lines of force in the rotating magnetic field to generate (output) current; the magnetic steel 220 is directly placed inside the rotor punching sheet 210, so that the strength of the rotor assembly 200 is improved, the magnetic steel 220 is not easy to deform, and the rotor assembly has good dynamic performance, and compared with a mode of pasting the magnetic steel 220, the rotor assembly has high installation stability and small assembly difficulty, reduces the process steps of pasting, dispensing and the like, improves the production efficiency, has larger generated torque and inductance, and can improve the power density of a motor. The cooling liquid flows into the cooling water channel 123 through the water inlet 122, fully flows on the shell 100 through the cooling water channel 123, and flows out of the cooling water channel 123 from the water outlet 121 to form a cooling cycle, so that the components in the shell 100 are cooled down, and the working stability of the components is ensured. The application has the characteristics of high size/power ratio, strong stability, high temperature resistance and impact resistance, can still work stably under the conditions of high temperature, high humidity, sand dust, impact, vibration and the like.

In one possible implementation, the rotor sheet 210 is provided with a magnetic steel groove, which is matched with the magnetic steel 220, and the magnetic steel groove is detachably connected with the magnetic steel 220. The main body of the rotor punching sheet 210 is in a cylindrical structure, the end surface is in a circular ring structure, as shown in fig. 4, a through hole in the middle part is suitable for being inserted into the rotating shaft 230, a magnetic steel groove is formed in the end surface of the circular ring structure, and the end surface of the magnetic steel groove is in a V-shaped structure; the end face of the magnetic steel 220 matched with the magnetic steel is also in a V-shaped structure. The magnetic steel grooves penetrate opposite sides of the rotor sheet 210. The magnet steel 220 is inserted into the magnet steel groove to fix the inside of the rotor punching sheet 210, and the magnet steel 220 is embedded into the rotor punching sheet 210, so that falling off in the working process is effectively avoided.

In one possible implementation, the magnetic steel groove is provided with more than two magnetic steel grooves; more than two magnetic steel grooves are arranged on the rotor punching sheet 210 in a circumferential arrangement. Further, the number of the magnetic steel grooves is 10, and the number of the magnetic steel 220 is also 10; as shown in fig. 4, 10 magnetic steel grooves are circumferentially arranged; each magnetic steel groove is internally provided with one magnetic steel 220 matched with the magnetic steel groove.

In one possible implementation, the shaft sleeve is divided into a first mounting shaft 231, a second mounting shaft 232, a third mounting shaft 233 and a fourth mounting shaft 234, which are sequentially connected; all have cylindrical structures. The diameter of the first mounting shaft 231 is the same as the diameter of the third mounting shaft 233; the diameter of the second mounting shaft 232 is larger than the diameter of the first mounting shaft 231; the diameter of the fourth mounting shaft 234 is smaller than the diameter of the first mounting shaft 231. The two ends of the second mounting shaft 232 are sleeved with a first clamping part 235 and a second clamping part 236, and the first clamping part 235 and the second clamping part 236 are provided with key holes.

In one possible implementation, the rotor assembly 200 is further provided with: a bracket 240; the bracket 240 is disposed between the rotor blade 210 and the second mounting shaft 232. As shown in fig. 3, the bracket 240 is provided with a connection portion; the main body of the bracket 240 is in a cylindrical structure, the end surface is in a circular ring structure, and a plurality of bolt holes are formed around the end surface; the inner side wall of the bracket 240 is provided with a connecting part in a protruding way, the connecting part is in a circular ring structure, and the inner side of the connecting part is matched with the second mounting shaft 232. The inner side wall of the rotor punching sheet 210 is sleeved on the outer side wall of the bracket 240; the inner side wall of the connecting portion is sleeved on the outer side wall of the second mounting shaft 232, so that the rotor punching sheet 210 is coaxially connected with the rotating shaft 230 through the bracket 240.

In one possible implementation manner, the bracket 240 is connected with the second mounting shaft 232 through the connection key 241, as shown in fig. 4, the connection key 241 is in a cylindrical structure as a whole, and when the connection part of the bracket 240 is sleeved on the second mounting shaft 232; the connection key 241 is inserted into the key hole of the first clamping portion 235, the key hole of the connection portion, and the key hole of the second clamping portion 236, respectively, and then locked, so as to connect the rotation shaft 230 with the bracket 240.

In one possible implementation, the rotor assembly 200 is provided with: a rotor baffle; the rotor baffles are two, and the two rotor baffles are respectively fixed on two sides of the rotor punching sheet 210. It should be noted that, the two rotor baffles are tightly fixed on two sides of the rotor punching sheet 210 respectively to achieve sealing and fixing effects, so that the magnetic steel 220 is limited inside the rotor punching sheet 210, and the magnetic steel 220 is prevented from separating from the rotor punching sheet 210 during the working process of the motor.

In one possible implementation, the two rotor baffles are fixedly connected to both end surfaces of the bracket 240 by bolts, respectively. As shown in fig. 4, the two rotor baffles are respectively a rotor baffle 211 and a rotor baffle 212; the middle parts of the rotor baffle 211 and the rotor baffle 212 are sleeved on the rotating shaft 230 and fixed on the two end surfaces of the cylindrical structure of the rotor punching sheet 210; further, the main body of the rotor baffle 211 is in a circular ring structure, the inner side wall of the circular ring structure of the rotor baffle 211 is provided with a plurality of bolt holes, and the bolt holes are circumferentially arranged along the circular ring structure; similarly, the main body of the rotor baffle 212 is also in a circular ring structure, and a plurality of bolt holes are formed in the inner side wall of the circular ring structure of the rotor baffle 212 and are circumferentially arranged along the circular ring structure; bolts respectively penetrate through the bolt holes of the rotor baffle 211 and the bolt holes of the bracket 240 to realize the connection between the rotor baffle 211 and one end face of the rotor punching sheet 210; bolts respectively penetrate through the bolt holes of the rotor baffle 212 and the bolt holes of the bracket 240 to realize the connection between the rotor baffle 212 and the other end surface of the rotor punching sheet 210; to achieve clamping of the two rotor baffles to the rotor punching 210 and sealing of the magnetic steel grooves. Here, the diameters of the two rotor baffles are the same as the diameters of the end faces of the rotor sheet 210.

In one possible implementation, the rotor assembly 200 is further provided with: a first bearing 250 and a second bearing 260; the first bearing 250 and the second bearing 260 are both sleeved on the rotating shaft 230; the first bearing 250 and the second bearing 260 are disposed on opposite sides of the rotor sheet 210, respectively. Further; the main body of the first bearing 250 is in a circular ring structure, the inner side of the circular ring structure is matched with the first installation shaft 231, and the first bearing 250 is sleeved on the first installation shaft 231. The main body of the second bearing 260 is also in a ring structure, the inner side of the ring structure is matched with the third mounting shaft 233, and the second bearing 260 is sleeved on the third mounting shaft 233.

In one possible implementation, the rotor assembly 200 is further provided with: a first retainer 270 and a second retainer 280; the first check ring 270 and the second check ring 280 are both sleeved on the rotating shaft 230; the first check ring 270 and the bracket 240 are respectively arranged on two opposite sides of the first bearing 250; the second retainer ring 280 and the bracket 240 are disposed on opposite sides of the second bearing 260, respectively. Further, the main body of the first retainer ring 270 is in a ring structure, the inner side of the ring structure is matched with the first mounting shaft 231, and the first retainer ring 270 is sleeved on the first mounting shaft 231 and is clung to the first bearing 250. The main body of the second check ring 280 is also in a circular ring structure, the inner side of the circular ring structure is matched with the third installation shaft 233, and the second check ring 280 is sleeved on the third installation shaft 233 and is clung to the second bearing 260.

In one possible implementation, the method further includes: first end cap 300 and second end cap 400; the first end cap 300 and the second end cap 400 are disposed at opposite ends of the housing 100. The first and second end caps 300 and 400 are detachably connected with respect to the housing 100 to facilitate maintenance and installation of the internal components.

As shown in fig. 6, the main body of the first end cover 300 is in a disc-shaped structure, a through hole 330 is formed in the middle of the main body, the first end cover 300 is sleeved on the third installation shaft 233 through the through hole 330, the through hole 330 is tightly attached to the second check ring 280, so that the second check ring is tightly attached to the casing 100, a plurality of bolt holes 310 are formed around the peripheral edge of the disc-shaped structure of the first end cover 300, a plurality of bolt holes 124 are formed around the surface, fixed to the first end cover 300, of the inner casing 120 of the casing 100, and the first end cover 300 is fixedly connected with the inner casing 120 of the casing 100 through bolts. The first end cap 300 is further provided with a plurality of heat dissipation holes 320; the heat dissipation holes 320 have a fan-shaped structure; a plurality of heat dissipating holes 320 are circumferentially arranged on the first end cap 300.

In one possible implementation, as shown in fig. 6, the first end cap 300 is further provided with a cap 340; the body of the cover 340 has a disc-shaped structure; the edge of the disc-shaped structure is provided with 6 bolt holes 341 in a surrounding mode, and the outer side of the first end cover 300 is also provided with 6 corresponding bolt holes 301; the cover 340 is fixed to the middle of the outside of the first end cap 300 by bolts; adapted to seal the through hole 330 in the middle of the first end cap 300.

In one possible implementation, the method further includes: a resolver shaft 600; the main body of the rotary transformer shaft 600 has a cylindrical structure, and the end surface has a circular ring structure; the central through hole 601 of the circular ring structure is matched with the fourth installation shaft 234, and the rotary transformer shaft 600 is sleeved on the fourth installation shaft 234.

In one possible implementation, the method further includes: resolver stator 620 and resolver rotor 610; the main body of the resolver stator 620 has a circular ring structure; the central through hole 621 of the annular structure is matched with the resolver shaft 600; resolver stator 620 is sleeved on resolver shaft 600. Resolver rotor 610 is fixed on the inner sidewall of first end cap 300; meanwhile, the main body of the rotary transformer rotor 610 is also in a circular ring structure; the central through hole 611 of the circular ring structure is sleeved on the outer side of the resolver stator 620, and a preset gap is arranged between the resolver rotor 610 and the resolver stator 620.

In one possible implementation, the method further includes: a third retainer ring 630; the main body of the third retainer ring 630 has a circular ring structure; the central through hole 631 of the annular structure mates with the fourth mounting axle 234; the third retainer ring 630 is sleeved on the fourth mounting shaft 234 and is disposed closely to the resolver shaft 600, and is suitable for limiting the resolver shaft 600.

In one possible implementation, the method further includes: output disc 700 and fourth retaining ring; the main body of the output disc 700 has a disc-shaped structure, a through hole is arranged in the middle of the main body, and the output disc 700 is sleeved on the rotating shaft 230 and is closely attached to the third check ring 630. Further, the fourth retainer ring and the cover 340 are respectively disposed on two opposite sides of the output disc 700, and are suitable for limiting the output disc 700.

In one possible implementation, the housing 100 includes: an outer case 110 and an inner case 120; the outer case 110 is closely sleeved on the outer sidewall of the inner case 120. As shown in fig. 5, the main body of the housing 110 has a circular tube structure; the main body of the inner case 120 is also of a circular tube type structure. The inner sidewall of the outer case 110 is disposed on the outer sidewall of the inner case 120. More than two bolt holes 124 are formed on two end surfaces of the inner shell 120, and the inner shell is suitable for being connected with the first end cover 300 and the second end cover 400 through bolts.

In one possible implementation, the heat sink channel 123 is spirally formed on the outer sidewall of the inner housing 120. The side of the inner case 120 connected to the second end cap 400 is provided with a water outlet 121 and a water inlet 122. As shown in fig. 5, the outer side wall of the inner case 120 is provided with a groove structure in a screw shape; the water outlet 121 is communicated with the water inlet 122 through a heat dissipation water channel 123, and is suitable for the sufficient circulation of cooling liquid.

In one possible implementation, the water inlet 122 is provided with a water inlet connector 130 and the water outlet 121 is provided with a water outlet connector 140. As shown in fig. 5, one end of the water inlet joint 130 is matched with the water inlet 122, and the water inlet joint 130 is inserted into the water inlet 122; one end of the water outlet connector 140 is matched with the water outlet 121, and the water outlet connector 140 is inserted into the water outlet 121 to realize the communication between the outside and the heat dissipation water channel 123.

In one possible implementation, as shown in fig. 7, the body of the second end cap 400 is in a disc-shaped structure; through holes 410 are formed in the middle of the shell, the second end cover 400 is sleeved on the first bearing 250 through the through holes 410 and is tightly attached to the first bearing 250, so that the second end cover 400 is tightly attached to the shell 100, a plurality of bolt holes 430 are formed around the disc-shaped structure of the second end cover 400, a plurality of bolt holes are formed around one surface, fixed to the second end cover 400, of the inner shell 120 of the shell 100, and the second end cover 400 is fixedly connected with the inner shell 120 of the shell 100 through bolts.

In one possible implementation, the second end cap 400 is further provided with a relief hole 420; the abdication hole 420 is in a rectangular structure, and the positions of the abdication hole are matched with the positions of the water inlet 122 and the water outlet 121; is adapted to yield the water inlet connector 130 and the water outlet connector 140.

In one possible implementation, the inner sidewall of the inner case 120 is provided with a clamping groove; the outer sidewall of the stator core 500 is matched with the clamping groove, the stator core 500 is clamped into the clamping groove of the inner shell 120, and the stator core 500 and the second end cover 400 are locked through bolts, so that the stator core 500 is installed.

The traditional fan motor's axle designs more for the major axis in the past, and the overall dimension is great, and is with high costs, and the pivot 230 length of this application is shorter, rotor subassembly 200 is less in the function simultaneous dimension that satisfies, through the holistic cost of manufacture of this application of reduction of above two points, is showing the technical level that has improved fan motor. The cooling efficiency of the fan motor is low and cannot be guaranteed, the fan motor adopts water cooling for cooling, water enters the cooling water channel 123 through the water inlet joint 130, circulates the whole device in a spiral running position, then flows out through the water outlet joint 140 to form cooling liquid circulation, so that the whole motor dissipates heat, and the surface temperature of the motor is less than or equal to 100 ℃ after the system works for 2 hours within the temperature requirement range; the efficiency is higher, brand new structural design, make simple structure, the cost is lower. Compared with the traditional fan motor, the novel fan motor adopts a brand new shell 100 and end cover structure; the motor can normally work under the conditions of high temperature, high humidity, sand dust and severe impact and vibration, and solves the problems that the prior motor works abnormally under severe conditions and the like. The application can work normally under the following conditions: (1) operating temperature: -43 ℃ -55 ℃; (2) storage temperature: -43 ℃ -70 ℃; (3) ambient humidity (35 ℃): 95% ± 3%; (4) altitude (m): 0-5000; (5) air pressure: 70kpa (absolute).

The embodiments of the present application have been described above, the foregoing description is exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A direct current fan motor, comprising: a housing, a stator core, and a rotor assembly;

the shell is sleeved on the outer side of the stator core;

the shell is provided with a heat dissipation water channel, and the outer side wall of the shell is provided with a water inlet and a water outlet; the water inlet is communicated with the water outlet through the heat dissipation water channel.

2. A direct current fan motor according to claim 1, wherein the rotor lamination is provided with a magnetic steel groove,

3. The direct current fan motor according to claim 2, wherein the magnetic steel groove is provided with more than two; more than two magnetic steel grooves are arranged on the rotor punching sheet in a circumferential arrangement mode.

4. A direct current fan motor according to claim 1, wherein the rotor assembly is provided with: a rotor baffle;

the rotor baffles are arranged in two, and the two rotor baffles are respectively fixed on two sides of the rotor punching sheet.

5. The direct current fan motor of claim 1, wherein the rotor assembly is further provided with: a bracket;

6. The direct current fan motor of claim 5, wherein the rotor assembly is further provided with: a first bearing and a second bearing;

the first bearing and the second bearing are sleeved on the rotating shaft;

7. The direct current fan motor of claim 1, further comprising: a first end cap and a second end cap;

8. The direct current fan motor of claim 1, wherein the housing comprises: an outer shell and an inner shell;

the outer shell is tightly sleeved on the outer side wall of the inner shell.

9. The direct current fan motor of claim 8, wherein the heat dissipation water channel is spirally formed on the outer side wall of the inner casing.

10. The direct current fan motor of claim 8, wherein the water inlet is provided with a water inlet connector and the water outlet is provided with a water outlet connector.