WO2022041659A1

WO2022041659A1 - Air-water cold mixed cooling permanent magnet drum

Info

Publication number: WO2022041659A1
Application number: PCT/CN2021/075065
Authority: WO
Inventors: 张春晖; 唐海彬
Original assignee: 江苏嘉轩智能工业科技股份有限公司
Priority date: 2020-08-26
Filing date: 2021-02-03
Publication date: 2022-03-03
Also published as: CN111740545B; CN111740545A

Abstract

The present invention relates to the technical field of electric motor transmission. Disclosed is an air-water cold mixed cooling permanent magnet drum, comprising: a main shaft (10), and a reciprocating water pipe (4) and fans (6) arranged in a stator cavity (5). The main shaft (10) is provided with radial plates (8) with holes and uniformly distributed in an axial direction or rib plates (18) distributed in a radial direction, the reciprocating water pipe (4) is fixed on the plurality of radial plates (8) with holes or the plurality of rib plates (18), and the plurality of fans (6) are uniformly distributed about the main shaft (10) at end parts of the plurality of radial plates (8) with holes or the plurality of rib plates (18) in a circumferential direction. According to the permanent magnet drum provided in the present invention, besides a conventional cooling waterway for cooling a stator coil assembly, cooling water flows through a water pipe by means of the reciprocating water pipe, so that a heat dissipation area of the cooling water in the stator cavity of the permanent magnet drum is increased; and hot air in the stator cavity is blown onto the surface of the water pipe by means of the fans to exchange heat with the cooling water in the water pipe, so that the heat dissipation area of water cooling is increased, and the water cooling effect is improved.

Description

A permanent magnet drum with mixed cooling of air and water

technical field

The invention relates to the technical field of motor transmission, and more particularly, to a permanent magnet drum with mixed cooling of wind and water.

Background technique

The permanent magnet drum has the advantages of simple mechanism, reliable operation, low loss, high efficiency, and can realize direct drive control. When the outer rotor permanent magnet drum is working, the coil installed on the stator will generate a lot of induced heat, which will easily lead to motor aging and affect the service life of the outer rotor permanent magnet drum. The outer rotor permanent magnet drum mainly relies on the cooling water circuit inside the stator. The drum is cooled by an external water cooler or an external water source. The cooling method is single and the heat dissipation area is limited. The cavity part has no cooling structure, so it cannot effectively dissipate heat, resulting in a high temperature rise of the drum.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention provides a permanent magnet drum combining air cooling and water cooling.

The technical solution provided by the present invention is a permanent magnet drum with mixed cooling of air and water, comprising: a main shaft 10, a reciprocating water pipe 4 and a fan 6 set in the stator cavity 5; the main shaft 10 is provided with a plurality of axial The cloth perforated webs 8 or a plurality of radially distributed ribs 18, the reciprocating water pipes 4 are fixed on a plurality of perforated webs 8 or a plurality of the ribs 18, and the plurality of the fans 6 are circumferentially uniform. The main shaft 10 is arranged on the ends of the plurality of perforated webs 8 or the plurality of rib plates 18 . The perforated webs 8 and the ribs 18 are used to support the stator cavity 5 and arrange the reciprocating water pipes 4. The cooling water in the reciprocating water pipes 4 water-cools the stator cavity 5, and the fan 6 is used to air-cool the stator cavity 5. Through the combination of water cooling and air cooling, the heat dissipation effect of the stator is enhanced.

Preferably, the perforated web 8 or the rib 18 is provided with a fixedly connected pipe clamp 15 to fix the reciprocating water pipe 4 . The reciprocating water pipe 4 can be fixed to a plurality of the perforated webs 8 or fixed to a plurality of the ribs 18 in the axial direction. The reciprocating water pipe 4 is arranged around the main shaft 10, and is fixed on each perforated web 8 for a circle or a certain arc, and then passes through a hole on the perforated web 8, and passes through the hole in the axial direction to reach the phase. The adjacent perforated webs 8 circle the same radian and surround the other perforated webs 8 in the same way, from the perforated web 8 at one end of the main shaft 10 to the other end, passing through the holes of the perforated web 8 to The same way as described above goes around from the other end to the end, and this way it is possible to wrap around one perforated web 8 multiple times. The reciprocating water pipe 4 is fixed on the perforated web 8 by the pipe clamp 15, or the reciprocating water pipe 4 is fixed on the rib plate 18, and extends along the main shaft 10 to one end of the stator cavity 5, and then reciprocates.

Preferably, the perforated web 8 has at least one through hole 14, and the shape of the through hole 14 can be a round hole, an oval hole or other shapes, for passing through the reciprocating water pipe and the wind generated by the fan.

Preferably, the diameter of one of the through holes 14 matches the size of the fan 6 . The main shaft 10 is uniformly distributed with a plurality of perforated webs 8 along the axial direction, and at least one through hole 14 is distributed on the perforated web 8, wherein the diameter of at least one through hole 14 matches the maximum contour diameter of the fan 6 , for ventilation.

Preferably, the reciprocating water pipe 4 is connected with the cooling water channel 3 and the water outlet device, and the cooling water channel 3 is connected with the water inlet device.

Preferably, the water outlet device includes a water outlet 19 provided on the main shaft 10 and a water outlet pipe 20 connected to the reciprocating water pipe 4 .

Preferably, the water inlet device includes a water inlet 16 provided on the main shaft 10 and a water inlet pipe 17 connected to the cooling water circuit 3 . The water inlet 16 on the main shaft 10 is connected to the cooling water circuit 3 of the stator through the water inlet pipe 17, the cooling water passage 3 of the stator is connected to the water inlet end of the reciprocating water pipe 4, and the water outlet end of the reciprocating water pipe 4 is connected to the water outlet 19 on the main shaft 10 through the water outlet pipe 20. . The reciprocating water pipe 4 can be made of copper finned pipes to improve the heat dissipation effect.

Preferably, the permanent magnet drum includes a stator punch and a stator coil assembly 2 , and the cooling water path 3 is set on the yoke of the stator punch. The stator coil assembly 2 is cooled by cooling water, and then the hot air in the stator cavity 5 is exchanged with the water source in the reciprocating water pipe 4 through the blower 6. The reciprocating water pipe 4 in the stator cavity 5 increases the cooling water in the permanent magnet The heat exchange area in the drum improves the cooling effect.

Preferably, a fixing frame is provided on the main shaft 10 to fix the fan 6 . The cooling air of the fan 6 forms a circulating air inside the permanent magnet drum, so that the heat inside the stator is evenly dispersed, and the surface of the main shaft 10 and the end cover assembly 1 dissipates heat to the outside, which improves the overall heat dissipation effect of the permanent magnet drum and weakens the The heating of the permanent magnet drum.

Preferably, a wiring port 7 is provided on the main shaft 10 to connect with the fan 6, and the driving device used by the fan 6 is a three-phase asynchronous motor or a hydraulic motor.

Preferably, the hydraulic oil pipe 12 of the hydraulic motor is connected to an external hydraulic pump through the connection port 7 .

Preferably, a spacer ring 13 is provided between the stator punch and the stator coil assembly 2 .

The driving device used by the fan 6 can be a three-phase asynchronous motor or a hydraulic motor; when driven by a hydraulic motor, the stator part can use radially distributed ribs 18, and the ribs 18 are welded on the main shaft 10 in a radially uniform manner. The stator cavity 5 is divided into a plurality of small cavities, and the distributed fans 6 correspond to the small cavities one by one, thereby isolating the stator coil assembly 2 from the hydraulic motor to prevent oil leakage of the hydraulic motor from affecting the coil; the hydraulic oil pipe 12 of the hydraulic motor Lead to the outside through the wiring port 7 to connect with the hydraulic pump.

The beneficial effects of the present invention are:

(1) The permanent magnet roller provided by the present invention not only cools the stator coil assembly by the conventional cooling water circuit, but also passes the cooling water through the stator cavity through the reciprocating water pipe, which increases the cooling water heat dissipation area in the stator cavity of the permanent magnet roller, so that the cooling water can be cooled. The range radiates to the cavity, and the cooling range is wider.

(2) Combined with the fan, the hot air in the stator cavity is blown to the surface of the water pipe to exchange heat with the cooling water in the water pipe, which increases the heat dissipation area of the water cooling and improves the water cooling effect; The heat is blown to the surface of the steel parts such as the end cover assembly, and the overall cooling effect of the permanent magnet drum is further increased through the heat exchange between the steel parts such as the end cover assembly and the outside air.

(3) The reciprocating water pipe is arranged in the cavity part of the stator assembly, and the water pipe is arranged around the entire cavity through various arrangement forms.

Description of drawings

Fig. 1 is the schematic diagram of the permanent magnet drum of the mixed cooling of air-water cooling provided in Embodiment 1 of the present invention;

Fig. 2 is the arrangement diagram of the reciprocating water pipe provided by the embodiment 1 of the present invention along the perforated web;

Fig. 3 is the arrangement diagram of the more preferred reciprocating water pipe along the perforated web provided in Embodiment 1 of the present invention;

Fig. 4 is the arrangement diagram of the more preferred reciprocating water pipe along the perforated web provided in Embodiment 2 of the present invention;

FIG. 5 is an arrangement diagram of a preferred reciprocating water pipe along a rib provided in Embodiment 2 of the present invention.

Among them: end cover assembly 1, stator coil assembly 2, cooling water circuit 3, reciprocating water pipe 4, stator cavity 5, fan 6, wiring port 7, perforated web 8, gap 9, main shaft 10, hydraulic oil pipe 12, spacer ring 13. Through hole 14, pipe clamp 15, water inlet 16, water inlet pipe 17, rib plate 18, water outlet 19, water outlet pipe 20, water inlet connection port 21, water outlet connection port 22.

detailed description

Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While specific embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be more thoroughly understood, and will fully convey the scope of the present invention to those skilled in the art.

It should be noted that certain terms are used in the description and claims to refer to specific components. It should be understood by those skilled in the art that the same component may be referred to by different nouns. The description and the claims do not use the difference in terms as a way to distinguish components, but use the difference in function of the components as a criterion for distinguishing. As referred to throughout the specification and claims, "comprising" or "including" is an open-ended term and should be interpreted as "including but not limited to". Subsequent descriptions in the specification are preferred embodiments for implementing the present invention, however, the descriptions are for the purpose of general principles of the specification and are not intended to limit the scope of the present invention. The scope of protection of the present invention should be determined by the appended claims.

Embodiment 1 This embodiment provides a permanent magnet drum with mixed cooling of air and water

As shown in FIG. 1, the permanent magnet drum includes: a main shaft 10, a reciprocating water pipe 4 and a fan 6 arranged in the stator cavity 5; the main shaft 10 is provided with axially evenly distributed webs 8 with holes, each with holes The web 8 is fixed on the main shaft 10 in the circumferential direction, the reciprocating water pipe 4 is surrounded by and reciprocally fixed on the plurality of perforated webs 8, the four fans 6 are circumferentially evenly distributed on the main shaft 10 at the left end of the plurality of

perforated webs

8, and 4 fans 6 The air is directed towards the perforated web 8 at the left end. The perforated web 8 is provided with a fixedly connected pipe clamp 15 (as shown in FIG. 2 ) to fix the reciprocating water pipe 4 . As shown in FIG. 2 , each of the perforated webs 8 is provided with 16 through holes 14, the through holes 14 evenly surround the web for two weeks, 8 per week, and 4 through holes are symmetrically arranged on the same diameter of the web. The holes 14 and the through holes 14 are round holes for passing through the reciprocating water pipe 4 and the wind generated by the fan 6. The installation position of each fan 6 corresponds to the two through holes 14 arranged on two sides, which is conducive to efficient ventilation. The arrangement of the reciprocating water pipe 4 is as follows: it is fixed around the perforated web 8 of the fan 6 near the left end, and then passes through a through hole 14 on the perforated web 8, and passes through the hole in the axial direction. Reach the adjacent perforated web 8, circle around once, and then circle the remaining perforated webs 8 in the same way, from the perforated web 8 at the left end of the main shaft 10 to the right end, and pass through the perforated web 8 at the right end The through holes 14 are arranged in a reciprocating manner in the same manner as above on the perforated web 8 at the right end and then reciprocatingly arranged. The preferred arrangement of the reciprocating water pipes 4 is as follows: on the basis of the above arrangement, only the perforated webs 8 close to the fan 6 are circled multiple times, and the remaining perforated webs 8 only axially pass through the reciprocating water pipes 4, In this way, the cooling effect of the fan is ensured, and the arrangement is simpler. The reciprocating water pipe 4 is connected with the cooling water channel 3 and the water outlet device, and the cooling water channel 3 is connected with the water inlet device. The water outlet device includes a water outlet 19 provided on the main shaft 10 and a water outlet pipe 20 connected to the reciprocating water pipe 4 . The water inlet device includes a water inlet 16 provided on the main shaft 10 and a water inlet pipe 17 connected to the cooling water circuit 3 . The water inlet 16 on the main shaft 10 is connected to the cooling water circuit 3 of the stator through the water inlet pipe 17, the cooling water passage 3 of the stator is connected to the water inlet end of the reciprocating water pipe 4, and the water outlet end of the reciprocating water pipe 4 is connected to the water outlet 19 on the main shaft 10 through the water outlet pipe 20. . The cooling water circuit 3 and the reciprocating water pipe 4 each have a connection port, which are the water inlet connection port 21 and the water outlet connection port 22 respectively. The water outlet pipe 20 is connected through the water outlet connection port.

The permanent magnet drum also includes a stator punch and a stator coil assembly 2, and a cooling water channel 3 is provided on the yoke of the stator punch. The stator coil assembly 2 is cooled by cooling water, and the reciprocating water pipe 4 in the stator cavity 5 increases the heat exchange area of the water in the permanent magnet drum and improves the cooling effect.

The main shaft 10 is provided with a fixing frame to fix the fan 6 , and a wiring port 7 is provided on the main shaft 10 to connect the fan 6 with an external three-phase asynchronous motor. Through the cooling air of the fan 6, circulating air is formed inside the permanent magnet drum, so that the heat inside the stator is evenly dispersed, and through the main shaft 10, the surface of the end cover assembly 1 dissipates heat to the outside, which improves the overall heat dissipation effect of the permanent magnet drum and reduces the The temperature of the permanent magnet drum.

In a preferred embodiment, another four fans 6 are circumferentially evenly distributed on the main shaft 10 at the right end of the plurality of perforated webs 8 , and the four fans 6 discharge air toward the perforated web 8 at the right end. The preferred arrangement of the reciprocating water pipe 4 is as follows: the perforated web 8 close to the left end fan 6 is fixed in a circle and then passes through a through hole 14 on the perforated web 8, and passes through the hole in the axial direction. and the through holes 14 of the remaining perforated webs 8, after reaching the right perforated web 8, pass through the through holes 14 of the right perforated web 8, and return to the left perforated web 8 in a circle. Continue to make a circle, and after reciprocating arrangement, it can circle multiple circles on the perforated web 8 at the left end and the perforated web 8 at the right end. As shown in FIG. 3 , in a more preferred embodiment, the arrangement of the reciprocating water pipes 4 is as follows: after being fixed around a certain arc on the perforated web 8 near one end of the fan 6 , it passes through the perforated web 8 . One of the through holes 14, which pass through the hole in the axial direction to the adjacent perforated webs 8, and then surround the remaining perforated webs 8 in the same manner after encircling the same arc, from the perforated web 8 at the left end of the main shaft to the After the right end, the through holes 14 passing through the perforated web 8 at the right end are reciprocatingly arranged in the same manner as above after the perforated web 8 at the right end surrounds a certain radian. Wrap around once for efficient water cooling with fewer wraps.

Embodiment 2 This embodiment provides a permanent magnet drum driven by a hydraulic motor with mixed cooling of air and water cooling

The permanent magnet drum includes an end cover assembly 1, a stator coil assembly 2, a cooling water circuit 3 for the stator, a reciprocating water pipe 4, a fan 6 and a main shaft 10. A stator cavity 5 is formed inside the stator, and the reciprocating water pipe 4 and the fan 6 are located in the stator cavity 5. Inside, the water inlet 16 on the main shaft 10 is connected to the cooling water circuit 3 of the stator through the water inlet pipe 17, the cooling water passage 3 of the stator is connected to the water inlet end of the reciprocating water pipe 4, and the water outlet end of the reciprocating water pipe 4 is connected to the outlet on the main shaft 10 through the water outlet pipe 20. Nozzle 19. The cooling water circuit 3 and the reciprocating water pipe 4 each have a connection port, which are the water inlet connection port 21 and the water outlet connection port 22 respectively. The water outlet pipe 20 is connected through the water outlet connection port.

The main shaft 10 is provided with four fixed frames evenly distributed in the circumferential direction for installing the four fans 6 , and the fixed frames are welded on the main shaft 10 . The fan 6 enters the stator cavity 5 through the wiring port 7 opened on the left end of the main shaft 10 for wiring, and leads the hydraulic oil pipe 12 of the hydraulic motor through the wiring port 7 to the outside to connect with the hydraulic pump. The main shaft 10 is provided with a plurality of axially distributed perforated webs 8, each perforated web 8 is fixed to the main shaft 10 in the circumferential direction, and the reciprocating water pipe 4 is surrounded and reciprocatingly fixed to the plurality of

perforated webs

8, 4 The fans 6 are evenly distributed on the main shafts 10 at the left ends of the plurality of perforated webs 8 in the circumferential direction. As shown in FIG. 4 , four through holes 14 are evenly distributed along the circumferential direction on each of the perforated webs 8 for ventilation. The installation positions of the four fans 6 correspond to the four through holes 14, and the four fans 6 face the left end. Perforated spokes 8 air outlets to ensure efficient ventilation. A pipe clamp 15 is welded on the perforated web 8 to fix the reciprocating water pipe 4. The reciprocating water pipe 4 is arranged around the main shaft 10, and after a certain arc is circled on the perforated web 8 near one end of the fan 6, it passes through the perforated web. A through hole 14 on the plate 8 passes through the hole in the axial direction to the adjacent perforated web 8, and then surrounds the remaining perforated webs 8 in the same manner after encircling the same arc. After the plate 8 is circled to the right end, the through holes 14 passing through the perforated web 8 at the right end are reciprocally arranged in the same way as above after the perforated web 8 at the right end circles a certain arc. The web 8 wraps around once to achieve high-efficiency water cooling with less wrapping.

The reciprocating water pipe 4 is connected to the cooling water circuit 3. The water pipe surrounds the main shaft 10 and then passes through the perforated web 8 to the other end, then surrounds the main shaft 10 as the center and passes back through the through hole 14 of the perforated web 8. In this way, the inner cavity of the stator is reciprocated and filled, and then led out to the water outlet 19 . The water flow enters the drum from the water inlet 16 of the main shaft 10 , and flows out from the water outlet 19 of the main shaft 10 after passing through the cooling water channel 3 and the reciprocating water pipe 4 . The reciprocating water pipe 4 is welded with fins, and the pipeline adopts red copper pipe to improve the heat dissipation effect.

The fan 6 blows air against the perforated web 8 arranged in the reciprocating water pipe 4, and exchanges the heat inside the stator with the cooling water in the water pipe. 14 One-to-one correspondence, the hot air in the cavity can pass through the through holes 14 on the perforated web 8 and the gap 9 between the rotor and the stator coil assembly 2 to form circulating air, so that the air inside the stator cavity 5 can circulate and blow heat to The surface of the end cap assembly 1 and the main shaft 10, and then the end cap assembly 1 and the main shaft 10 dissipate heat through heat exchange with external air to further enhance the overall cooling effect of the drum.

The driving device used by the fan 6 is a hydraulic motor, and the hydraulic oil pipe 12 of the hydraulic motor is led to the external hydraulic pump station through the connection port 7 and connected. A spacer ring 13 is provided between the stator punch and the stator coil assembly 2 to isolate the stator coil assembly 2 from the hydraulic motor and prevent oil leakage from the motor from affecting the coil.

As shown in FIG. 5 , in a preferred embodiment, the stator part can use radial rib plates 18 to replace the axial perforated webs 8 , and the eight rib plates 18 are radially evenly distributed and welded on the main shaft 10 , wherein Four rib plates 18 are located on the back of the fan 6, and the pipe clamp 15 fixes the reciprocating water pipe 4 on each rib plate 18 in an axial reciprocating manner, dividing the stator cavity 5 into a plurality of cavities, and distributing four fans in the circumferential direction. 6. The end faces on the left and right sides of the four rib plates 18 arranged at intervals are on the same axis as the center of the fan 6, thereby further isolating the stator coil assembly 2 from the hydraulic motor and preventing oil leakage from affecting the coil.

The above-mentioned specific embodiments further describe the purpose, technical solutions and beneficial effects of the present invention in detail. In addition, it should be understood that although this specification is described in terms of implementation manners, the above-mentioned embodiments are exemplary and are not intended to be used for The protection scope of the present invention is limited, and any changes, modifications, replacements and modifications made to the above-described embodiments by those of ordinary skill in the art without departing from the principles and purposes of the present invention shall be included in the protection scope of the present invention. Inside.

Claims

An air-water-cooled mixed-cooled permanent magnet drum, characterized in that it comprises: a main shaft (10), a reciprocating water pipe (4) and a fan (6) arranged in a stator cavity (5); A plurality of axially evenly distributed perforated webs (8) or a plurality of radially distributed rib plates (18) are provided, and the reciprocating water pipes (4) are surrounded and reciprocally fixed on the plurality of perforated webs (8) Or axially reciprocatingly fixed to a plurality of said rib plates (18), and a plurality of said fans (6) are circumferentially evenly distributed on a plurality of said perforated webs (8) or the ends of a plurality of said rib plates (18). the spindle (10).
The permanent magnet drum for air-water cooling mixed cooling according to claim 1, wherein the perforated web (8) or the rib (18) is provided with a fixedly connected pipe clamp (15) to fix the reciprocating water pipe ( 4).
The permanent magnet drum with mixed cooling by air and water according to claim 1, characterized in that, each of the perforated webs (8) has at least one through hole (14).
The air-water-cooled mixed-cooled permanent magnet drum according to claim 3, characterized in that the diameter of at least one of the through holes (14) matches the size of the fan (6).
The permanent magnet drum for mixed cooling of air and water cooling according to claim 1, characterized in that the reciprocating water pipe (4) is connected with the cooling water path (3) and the water outlet device, and the cooling water path (3) is connected with the water inlet device .
The permanent magnet drum with mixed cooling of air and water cooling according to claim 5, characterized in that the water outlet device comprises a water outlet (19) provided on the main shaft (10) and an outlet connected to the reciprocating water pipe (4). Water pipe (20).
The permanent magnet drum with air-water cooling mixed cooling according to claim 5, characterized in that the water inlet device comprises a water inlet (16) provided on the main shaft (10) and a water inlet (16) connected to the cooling water circuit (3). Water inlet pipe (17).
The permanent magnet drum with air-water cooling mixed cooling according to any one of claims 5-7, wherein the permanent magnet drum comprises a stator punch and a stator coil assembly (2), and the cooling water circuit (3) is provided in the The yoke of the stator punch.
The permanent magnet drum with mixed cooling of air and water according to claim 1, characterized in that, a fixing frame is provided on the main shaft (10) to fix the fan (6).
The permanent magnet drum with mixed cooling of air and water cooling according to claim 8, characterized in that, a wiring port (7) is provided on the main shaft (10) to be connected with the fan (6), and the fan (6) uses The driving device is a three-phase asynchronous motor or a hydraulic motor.
The permanent magnet drum with mixed cooling of air and water cooling according to claim 10, characterized in that, the hydraulic oil pipe (12) of the hydraulic motor is connected to an external hydraulic pump through the connection port (7).
The permanent magnet drum with mixed cooling of air and water cooling according to claim 11, characterized in that a spacer ring (13) is arranged between the stator punch and the stator coil assembly (2).