CN114498974A

CN114498974A - Stator heat radiation structure of permanent magnet synchronous motor

Info

Publication number: CN114498974A
Application number: CN202111626265.9A
Authority: CN
Inventors: 黄新建
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-05-13

Abstract

The invention discloses a stator heat dissipation structure of a permanent magnet synchronous motor, which relates to the technical field of motor stator winding heat dissipation and comprises a motor shell, wherein a rotating shaft is rotatably arranged in the motor shell through a bearing, two ends of the rotating shaft penetrate through the inner wall of the motor shell and extend to the outside of the motor shell, a rotor is fixedly sleeved in the middle of the outer side of the rotating shaft, a plurality of permanent magnets are uniformly and fixedly arranged on the outer wall of the rotor, a stator is arranged on the outer side of the rotor, and the stator is fixedly connected with the inner wall of the motor shell. According to the invention, the traditional air heat dissipation mode is replaced by the mode of directly exchanging heat with the stator core and the stator winding after the heat-conducting air bag is expanded, so that the heat exchange rate is effectively improved, the stator core and the stator winding are rapidly cooled, meanwhile, dust in the outside air can be prevented from entering the device through an air inlet mode, the condition that the heat exchange efficiency is influenced is avoided, and the good and stable heat dissipation is realized.

Description

Stator heat radiation structure of permanent magnet synchronous motor

Technical Field

The invention relates to the technical field of motor stator winding heat dissipation, in particular to a stator heat dissipation structure of a permanent magnet synchronous motor.

Background

The permanent magnet motor replaces an excitation winding with a permanent magnet to establish an excitation magnetic field, under the steady state condition, a stator rotating magnetic field and a main pole magnetic field established by the permanent magnet keep relatively static, the mutual action of the stator rotating magnetic field and the main pole magnetic field generates electromagnetic torque to drive a motor main shaft to rotate and carry out energy conversion, a stator winding is used as a main heat source when the permanent magnet motor runs, when the temperature of the winding rises above the temperature limit specified by the motor insulation grade, the risk that the armature winding is damaged in insulation can exist, and further the motor short circuit is caused, and in order to avoid the situation, the motor stator needs to be cooled and radiated in the working process of the permanent magnet motor.

The invention patent of patent application publication No. CN 105071619B discloses a permanent magnet brushless motor with a stator winding provided with a heat dissipation device, which comprises a casing, a stator, a rotor, a bearing assembly, a Venturi air duct and an axial flow fan; the stator comprises a stator core, a stator winding, a winding air inlet pipe assembly and a winding air outlet pipe assembly, wherein a stator slot is formed in the stator core, the stator winding formed by winding hollow copper wires with tubular sections is located in the stator slot, and the hollow copper wires form a heat dissipation inner air duct of the stator winding. The invention has the advantages that: the permanent magnet motor stator winding heat dissipation device is small in size, light in weight, large in power and torque, high in overload capacity and good in heat dissipation performance.

Although motor stator's heat transfer can be realized to above-mentioned structure, its main heat transfer mode also carries out the heat transfer through near hollow copper conductor and the inside stator of motor hot air, rather than carrying out direct heat transfer with stator core and stator winding, when just so leading to actual heat transfer, stator core and stator winding can't be fast and better cool down, especially when above-mentioned motor is arranged in the great environment of dust, dust when in the outside air gets into inside the motor and attached to the surface back of hollow copper conductor, hollow copper conductor's heat exchange efficiency will further receive the influence, and then can't carry out better heat dissipation more.

Therefore, it is necessary to provide a heat dissipation structure for a stator of a pmsm to solve the above problems.

Disclosure of Invention

The invention aims to provide a stator heat dissipation structure of a permanent magnet synchronous motor, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a stator heat dissipation structure of a permanent magnet synchronous motor comprises a motor shell, wherein a rotating shaft is rotatably arranged in the motor shell through a bearing, two ends of the rotating shaft penetrate through the inner wall of the motor shell and extend to the outside of the motor shell, a rotor is fixedly sleeved in the middle of the outer side of the rotating shaft, a plurality of permanent magnets are uniformly and fixedly arranged on the outer wall of the rotor, a stator is arranged on the outer side of the rotor and fixedly connected with the inner wall of the motor shell, the stator comprises a stator core, an inner convex part and a plurality of stator windings, the inner convex part and the stator windings are provided with a plurality of inner convex parts which are uniformly and fixedly arranged on the inner side of the stator core, the plurality of stator windings are respectively sleeved on the outer sides of the inner convex parts, an air bag type heat exchange mechanism is arranged on the inner side of the stator core, and a heat conduction air bag in the air bag type heat exchange mechanism is attached to the inner side wall of the stator core and the outer wall of the stator winding after being inflated and expanded, gasbag formula heat transfer mechanism both sides all are provided with air current feed mechanism, and two air current feed mechanism all communicates with gasbag formula heat transfer mechanism, is located left air current feed mechanism left side top fixedly connected with filters formula mechanism of admitting air, is located the right side air current feed mechanism right side bottom fixedly connected with exhaust mechanism, motor casing top left side is from the fixed linkage dust removal mechanism and the dust blowing mechanism that has set gradually from the left hand right side.

Preferably, gasbag formula heat transfer mechanism includes heat conduction gasbag and limiting plate, heat conduction gasbag all is provided with a plurality ofly with the limiting plate, and is a plurality of heat conduction gasbag and a plurality of stator winding crisscross setting each other, the limiting plate bonds and sets up in one side that the stator core inside wall was kept away from to the heat conduction gasbag.

Preferably, air current intercommunication mechanism includes annular honeycomb duct, horizontal honeycomb duct, collar and dead lever, horizontal honeycomb duct is provided with a plurality ofly, and is a plurality of horizontal honeycomb duct is even fixed to be run through and sets up in one side that annular honeycomb duct is close to gasbag formula heat transfer mechanism, and is a plurality of horizontal honeycomb duct is fixed respectively to run through a plurality of heat conduction gasbag outsides and communicate with a plurality of heat conduction gasbags respectively, the collar is located the annular honeycomb duct outside and with motor casing inner wall fixed connection, the dead lever is provided with a plurality ofly, and is a plurality of the dead lever all with distribute in the collar inboard, and dead lever one end and annular honeycomb duct fixed connection, the dead lever other end and collar inner wall fixed connection.

Preferably, the filtering type air inlet mechanism comprises a three-way air inlet pipe, a one-way valve, a lifting piston, a piston rod, a first linkage plate, a first nut, a reciprocating screw rod, a second bevel gear, a fixed seat, an air inlet channel and a dust screen, the three-way air inlet pipe is fixedly connected with the inner wall of the motor shell, an exhaust end of the three-way air inlet pipe penetrates through an annular flow guide pipe in the left air flow communication mechanism and is fixedly connected with the annular flow guide pipe, the number of the one-way valves is two, the two one-way valves are respectively and fixedly arranged at the air inlet end of the three-way air inlet pipe and the exhaust end of the three-way air inlet pipe, the lifting piston is arranged in the three-way air inlet pipe in a sliding manner in the vertical direction, the piston rod is fixedly arranged at the bottom of the lifting piston, the first linkage plate is fixedly arranged at the bottom end of the piston rod, the first nut is fixedly arranged at the left side of the first linkage plate, and the reciprocating screw rod is positioned at the inner side of the first nut and is in threaded connection with the first nut, the fixed setting in reciprocal lead screw bottom of second bevel gear, the fixing base rotates through the bearing and cup joints and sets up in reciprocal lead screw top, and fixing base and motor casing inner wall fixed connection, inlet channel sets up in motor casing top and communicates with tee bend intake pipe inlet end, the dust screen is fixed to be set up in motor casing top and cover and inlet channel top.

Preferably, exhaust mechanism includes blast pipe and exhaust passage, the blast pipe internal diameter is less than tee bend intake pipe internal diameter, blast pipe and motor casing inner wall fixed connection, and its top is fixed run through annular honeycomb duct in the right side air current intercommunication mechanism and with this annular honeycomb duct fixed connection, exhaust passage runs through and sets up in motor casing bottom right side, and with the blast pipe intercommunication.

Preferably, the linkage dust removing mechanism comprises two mounting plates, a transverse plate, an unidirectional screw rod, a second nut, a driven gear, a rack rod, a lifting rod and a second linkage plate, the two mounting plates are respectively positioned on two sides of the dust screen and are fixedly connected with the motor shell, the transverse plate is fixedly arranged between the two mounting plates, the unidirectional screw rod penetrates through the two mounting plates and is rotatably connected with the two mounting plates through bearings, the second nut is sleeved outside the unidirectional screw rod and is in threaded connection with the unidirectional screw rod, a brush is fixedly arranged at the bottom of the second nut, the driven gear is fixedly arranged at the left end of the unidirectional screw rod, the rack rod is positioned at the rear side of the driven gear and is meshed with the driven gear, the lifting rod is fixedly arranged at the bottom end of the rack rod and penetrates through the outer wall of the motor shell and extends to the interior of the motor shell and is simultaneously in sliding connection with the motor shell, the second linkage plate is fixedly arranged at the bottom end of the lifting rod and is fixedly connected with the first nut.

Preferably, blow dirt mechanism and be responsible for, arc flow distribution box and reposition of redundant personnel branch pipe including the reposition of redundant personnel, the reposition of redundant personnel is responsible for the bottom mounting and runs through the tee bend intake pipe and communicate with the tee bend intake pipe, the reposition of redundant personnel is responsible for the top and runs through motor casing inner wall and extend to the motor casing outside, arc flow distribution box is fixed to be set up in the motor casing top, and is responsible for the top with the reposition of redundant personnel and communicate, flow distribution branch pipe is provided with a plurality ofly, and is a plurality of flow distribution branch pipe is even fixed to be run through and is set up in arc flow distribution box left side.

The invention has the technical effects and advantages that:

the invention is provided with the air bag type heat exchange mechanism and the filtering type air inlet mechanism, so that a lifting piston in the filtering type air inlet mechanism is used for continuously lifting in the three-way air inlet pipe, and further external air is sucked through the dustproof net, at the moment, the air is filtered, the filtered air enters the heat conduction air bag in the air bag type heat exchange mechanism through the left air flow communication mechanism under the driving of the lifting piston, and further expansion of the heat conduction air bag is realized, the expanded heat conduction air bag is contacted with the inner wall of the stator core and the outer wall of the stator winding, and further directly exchanges heat with the stator core and the stator winding, the air in the heat conduction air bag enters the exhaust pipe through the right air flow communication mechanism after being cooled, and is exhausted through the exhaust passage Effectively improved heat transfer rate, and then realized stator core and stator winding's rapid cooling, can avoid outside air to enter into the device through the mode that admits air simultaneously inside, and then avoid taking place the condition that heat exchange efficiency is influenced, realized better and stable heat dissipation.

Drawings

Fig. 1 is an overall front sectional structural view of the present invention.

Fig. 2 is a schematic side view of the stator of the present invention.

Fig. 3 is a partial side view structural diagram of the stator core of the present invention.

FIG. 4 is a side view of the air flow communication mechanism of the present invention.

Fig. 5 is a schematic front sectional structural view of the filter type air inlet mechanism, the linkage dust removing mechanism and the dust blowing mechanism of the invention.

Fig. 6 is a front sectional structural schematic view of the filter type intake mechanism of the present invention.

Fig. 7 is a schematic front sectional structural view of the linkage dust removing mechanism and the dust blowing mechanism of the present invention.

Fig. 8 is a front cross-sectional structural schematic view of the exhaust mechanism of the present invention.

In the figure: 1. a motor housing; 11. a rotating shaft; 110. a first bevel gear; 12. a rotor; 13. a permanent magnet; 2. a stator; 21. a stator core; 22. an inner protrusion; 23. a stator winding; 3. an air bag type heat exchange mechanism; 31. a thermally conductive bladder; 32. a limiting plate; 4. an airflow communication mechanism; 41. an annular flow guide pipe; 42. a horizontal draft tube; 43. a mounting ring; 44. fixing the rod; 5. a filter type air inlet mechanism; 51. a three-way air inlet pipe; 52. a one-way valve; 53. a lift piston; 54. a piston rod; 55. a first linkage plate; 56. a first nut; 57. a reciprocating screw rod; 58. a second bevel gear; 59. a fixed seat; 591. an air intake passage; 592. a dust screen; 6. an exhaust mechanism; 61. an exhaust pipe; 62. an exhaust passage; 7. a linkage dust removal mechanism; 71. mounting a plate; 72. a transverse plate; 73. a one-way screw rod; 74. a second nut; 75. a driven gear; 76. a rack bar; 77. a lifting rod; 78. a second linkage plate; 8. a dust blowing mechanism; 81. a main flow distribution pipe; 82. an arc-shaped shunt box body; 83. and branch pipes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The invention provides a stator heat dissipation structure of a permanent magnet synchronous motor as shown in fig. 1-8, which comprises a motor housing 1, wherein a rotating shaft 11 is rotatably arranged in the motor housing 1 through a bearing, two ends of the rotating shaft 11 penetrate through the inner wall of the motor housing 1 and extend to the outside of the motor housing 1, a rotor 12 is fixedly sleeved in the middle of the outer side of the rotating shaft 11, a plurality of permanent magnets 13 are uniformly and fixedly arranged on the outer wall of the rotor 12, a stator 2 is arranged on the outer side of the rotor 12, the stator 2 is fixedly connected with the inner wall of the motor housing 1, the stator 2 comprises a stator core 21, an inner convex portion 22 and a stator winding 23, a plurality of the inner convex portions 22 and a plurality of the stator winding 23 are respectively arranged, a plurality of the inner convex portions 22 are uniformly and fixedly arranged on the inner side of the stator core 21, a plurality of the stator windings 23 are respectively sleeved on the outer sides of the inner convex portions 22, stator core 21 inboard is provided with gasbag formula heat transfer mechanism 3, heat conduction gasbag 31 among the gasbag formula heat transfer mechanism 3 aerifys the inflation back and laminates with stator core 21 inside wall and stator winding 23 outer wall, 3 both sides of gasbag formula heat transfer mechanism all are provided with air current feed mechanism 4, and two air current feed mechanism 4 all communicates with gasbag formula heat transfer mechanism 3, is located left 4 left side top fixedly connected with filtration formula air inlet mechanism 5 of air current feed mechanism, is located the right side 4 right side bottom fixedly connected with exhaust mechanism 6 of air current feed mechanism.

As shown in fig. 2 and 3, the air bag type heat exchange mechanism 3 includes a heat conducting air bag 31 and a limiting plate 32.

More specifically, heat conduction gasbag 31 all is provided with a plurality ofly, a plurality of with limiting plate 32 heat conduction gasbag 31 and a plurality of stator winding 23 crisscross setting each other, limiting plate 32 bonds and sets up in one side that stator core 21 inside wall was kept away from to heat conduction gasbag 31 aerifys can laminate with stator core 21 inner wall and stator winding 23 outer wall after taking place the inflation, and then carries out quick heat transfer with stator core 21 and stator winding 23, and the inside air of heat conduction gasbag 31 then carries out the heat transfer with heat conduction gasbag 31.

As shown in fig. 4, the air flow communication mechanism 4 includes an annular duct 41, a horizontal duct 42, a mounting ring 43, and a fixing rod 44.

More specifically, a plurality of horizontal guide pipes 42 are arranged, the plurality of horizontal guide pipes 42 are uniformly and fixedly arranged on one side of the annular guide pipe 41 close to the air bag type heat exchange mechanism 3 in a penetrating way, the plurality of horizontal flow guide pipes 42 respectively fixedly penetrate through the outer sides of the plurality of heat conducting air bags 31 and are respectively communicated with the plurality of heat conducting air bags 31, the mounting ring 43 is positioned outside the annular flow guide pipe 41 and is fixedly connected with the inner wall of the motor shell 1, the fixing rods 44 are provided in plurality, the fixing rods 44 are distributed on the inner side of the mounting ring 43, one end of the fixed rod 44 is fixedly connected with the annular flow guide pipe 41, the other end of the fixed rod 44 is fixedly connected with the inner wall of the mounting ring 43, so that the left air flow communication mechanism 4 can serve as an air transmission channel between the filtering type air inlet mechanism 5 and the air bag type heat exchange mechanism 3, and the right air flow communication mechanism 4 can serve as an air transmission channel between the air bag type heat exchange mechanism 3 and the exhaust mechanism 6.

As shown in fig. 5 and 6, the filtering type air intake mechanism 5 includes a three-way air intake pipe 51, a one-way valve 52, a lifting piston 53, a piston rod 54, a first linkage plate 55, a first nut 56, a reciprocating screw 57, a second bevel gear 58, a fixed seat 59, an air intake passage 591 and a dust screen 592.

More specifically, the three-way air inlet pipe 51 is fixedly connected with the inner wall of the motor housing 1, the exhaust end of the three-way air inlet pipe 51 penetrates through the annular flow guide pipe 41 in the left-side air flow communication mechanism 4 and is fixedly connected with the annular flow guide pipe 41, two check valves 52 are arranged, the two check valves 52 are respectively and fixedly arranged at the air inlet end of the three-way air inlet pipe 51 and the exhaust end of the three-way air inlet pipe 51, the lifting piston 53 is slidably arranged in the three-way air inlet pipe 51 in the vertical direction, the piston rod 54 is fixedly arranged at the bottom of the lifting piston 53, the first linkage plate 55 is fixedly arranged at the bottom end of the piston rod 54, the first nut 56 is fixedly arranged at the left side of the first linkage plate 55, the reciprocating screw 57 is positioned at the inner side of the first nut 56 and is in threaded connection with the first nut 56, the second bevel gear 58 is fixedly arranged at the bottom end of the reciprocating screw 57, the fixing seat 59 is rotatably sleeved at the top end of the reciprocating screw 57 through a bearing, the fixed seat 59 is fixedly connected with the inner wall of the motor housing 1, the air inlet passage 591 is opened at the top of the motor housing 1 and is communicated with the air inlet end of the three-way air inlet pipe 51, the dust screen 592 is fixedly arranged at the top of the motor housing 1 and covers the top of the air inlet passage 591, so that when the first linkage plate 55 is lifted circularly, the lifting piston 53 is driven by the piston rod 54 to lift circularly inside the three-way air inlet pipe 51, due to the limitation of the two one-way valves 52, the lifting piston 53 continuously sucks the outside air into the three-way air inlet pipe 51 through the dust screen 592 and the air inlet passage 591, then the air is input into the annular flow guide pipe 41 in the left air flow communication mechanism 4 through the air outlet end of the three-way air inlet pipe 51, and then the air is input into the heat conduction air bag 31 through the horizontal flow guide pipe 42 on the left annular flow guide pipe 41.

As shown in fig. 8, the exhaust mechanism 6 includes an exhaust pipe 61 and an exhaust passage 62.

More specifically, the inner diameter of the exhaust pipe 61 is smaller than the inner diameter of the three-way intake pipe 51, the exhaust pipe 61 is fixedly connected with the inner wall of the motor housing 1, the top end of the exhaust pipe fixedly penetrates through the annular flow guide pipe 41 in the right airflow communication mechanism 4 and is fixedly connected with the annular flow guide pipe 41, the exhaust passage 62 penetrates through the right side of the bottom of the motor housing 1 and is communicated with the exhaust pipe 61, so that air after heat exchange inside the heat-conducting airbag 31 can enter the right annular flow guide pipe 41 through the horizontal flow guide pipe 42 on the right annular flow guide pipe 41, then is input into the exhaust passage 62 through the exhaust pipe 61, and is finally discharged through the exhaust passage 62.

Example 2

Different from the above embodiment, the technician finds that, in the actual use process, along with the extension of the service life of the dust screen 592, dust or other impurities in the air can be accumulated on the surface of the dust screen 592, and then the entering rate of the external air is affected, and further the heat dissipation effect of the device is reduced, in order to avoid the above situations:

the linkage dust removing mechanism 7 and the dust blowing mechanism 8 are sequentially and fixedly arranged on the left side of the top of the motor shell 1 from left to right, and as shown in fig. 7, the linkage dust removing mechanism 7 comprises a mounting plate 71, a transverse plate 72, a one-way screw rod 73, a second nut 74, a driven gear 75, a rack rod 76, a lifting rod 77 and a second linkage plate 78.

More specifically, two mounting plates 71 are provided, two mounting plates 71 are respectively located at two sides of the dust screen 592 and are fixedly connected with the motor housing 1, the transverse plate 72 is fixedly arranged between the two mounting plates 71, the one-way screw rod 73 penetrates through the two mounting plates 71 and is rotationally connected with the two mounting plates 71 through a bearing, the second nut 74 is sleeved outside the one-way screw rod 73 and is in threaded connection with the one-way screw rod 73, the bottom of the second nut 74 is fixedly provided with a brush, the driven gear 75 is fixedly arranged at the left end of the one-way screw rod 73, the rack bar 76 is located at the rear side of the driven gear 75 and engaged with the driven gear 75, the lifting bar 77 is fixedly arranged at the bottom end of the rack bar 76, penetrates through the outer wall of the motor housing 1 and extends to the inside of the motor housing 1, and the second coupling plate 78 is fixedly arranged at the bottom end of the lifting rod 77 and fixedly connected with the first nut 56.

Meanwhile, the dust blowing mechanism 8 includes a main diversion pipe 81, an arc-shaped diversion box 82 and a branch diversion pipe 83.

More specifically, the reposition of redundant personnel is responsible for 81 bottom fixings and runs through tee bend intake pipe 51 and communicates with tee bend intake pipe 51, reposition of redundant personnel is responsible for 81 tops and runs through motor casing 1 inner wall and extend to motor casing 1 outside, arc reposition of redundant personnel box 82 is fixed to be set up in motor casing 1 top, and communicates with reposition of redundant personnel 81 tops, reposition of redundant personnel branch pipe 83 is provided with a plurality ofly, and is a plurality of reposition of redundant personnel branch pipe 83 evenly is fixed to be run through and is set up in arc reposition of redundant personnel box 82 left side.

Through the arrangement of the structure, in the process of lifting the first nut 56, the second linkage plate 78 can synchronously lift in a circulating manner, and then the lifting rod 77 drives the rack bar 76 to lift in a circulating manner, so that the rack bar 76 continuously drives the driven gear 75 to rotate clockwise and anticlockwise, at this time, under the limitation of the transverse plate 72, the one-way screw rod 73 repeatedly drives the second nut 74 to move left and right, and the second nut 74 continuously wipes the top of the dust screen 592 through a brush at the bottom of the second nut 74 in the moving process, so that dust or foreign matters are prevented from being accumulated on the top of the dust screen 592;

meanwhile, when gas enters the right annular flow guide pipe 41 from the three-way air inlet pipe 51, part of the gas flows into the arc-shaped flow distribution box 82 through the flow distribution main pipe 81, then the dust screen 592 and accessories of the dust screen 592 are blown through the flow distribution branch pipes 83, and then dust and sundries brushed down by the brush are blown away by the dust screen 592, so that the dust or the sundries are prevented from being accumulated near the dust screen 592 to cause that the subsequent external air is sucked in, and the dust or the sundries driving the accessories of the dust screen 592 are accumulated at the top of the dust screen 592 again, thereby effectively avoiding the influence on the entering speed of the external air caused by the accumulation of the dust or the other sundries and reducing the heat dissipation effect of the device.

The working principle of the invention is as follows:

in the practical use process, when the rotating shaft 11 rotates, the rotating shaft 11 drives the second bevel gear 58 to rotate through the first bevel gear 110, the second bevel gear 58 drives the reciprocating screw rod 57 to rotate, so that the first nut 56 circularly ascends and descends on the outer side of the reciprocating screw rod 57, and the first linkage plate 55 and the second bevel gear 58 synchronously ascend and descend in the ascending and descending process of the first nut 56;

when the first linkage plate 55 circularly ascends and descends, the piston rod 54 drives the ascending and descending piston 53 to circularly ascend and descend inside the three-way air inlet pipe 51, due to the limitation of the two check valves 52, the ascending and descending piston 53 continuously sucks the outside air into the three-way air inlet pipe 51 through the dust screen 592 and the air inlet passage 591, then the air is input into the annular flow guide pipe 41 in the left air flow communication mechanism 4 from the exhaust end of the three-way air inlet pipe 51, then the air is input into the heat conduction air bag 31 through the horizontal flow guide pipe 42 on the left annular flow guide pipe 41, at the moment, the heat conduction air bag 31 is inflated and expanded, and is attached to the inner wall of the stator core 21 and the outer wall of the stator winding 23, so as to rapidly exchange heat with the stator core 21 and the stator winding 23, the air inside the heat conduction air bag 31 exchanges heat, and the air after heat exchange enters the right annular flow guide pipe 41 through the horizontal flow guide pipe 42 on the right annular flow guide pipe 41, then is input to the inside of the exhaust passage 62 through the exhaust pipe 61, and is finally discharged from the exhaust passage 62;

when the second linkage plate 78 circularly ascends and descends, the second linkage plate drives the rack bar 76 to circularly ascend and descend through the lifting rod 77, so that the rack bar 76 continuously drives the driven gear 75 to rotate clockwise and anticlockwise, at this time, under the limitation of the transverse plate 72, the one-way screw rod 73 repeatedly drives the second nut 74 to move left and right, the second nut 74 continuously wipes the top of the dust screen 592 through a brush at the bottom of the second nut 74 in the moving process, and dust or foreign matters are prevented from being accumulated on the top of the dust screen 592;

when the air enters the right annular flow guide pipe 41 from the three-way air inlet pipe 51, part of the air flows into the arc-shaped flow distribution box 82 through the flow distribution main pipe 81, then the dust screen 592 and the dust screen 592 accessories are blown through the plurality of flow distribution branch pipes 83, and then the dust and the sundries brushed by the brush are blown away by the dust screen 592, so that the dust or the sundries which are accumulated near the dust screen 592 and cause the subsequent outside air to be sucked in and drive the dust or the sundries attached to the dust screen 592 to be accumulated on the top of the dust screen 592.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A stator heat dissipation structure of a permanent magnet synchronous motor comprises a motor shell (1), wherein a rotating shaft (11) is rotatably arranged in the motor shell (1) through a bearing, two ends of the rotating shaft (11) penetrate through the inner wall of the motor shell (1) and extend to the outside of the motor shell (1), a rotor (12) is fixedly sleeved in the middle of the outer side of the rotating shaft (11), a plurality of permanent magnets (13) are uniformly and fixedly arranged on the outer wall of the rotor (12), a stator (2) is arranged on the outer side of the rotor (12), the stator (2) is fixedly connected with the inner wall of the motor shell (1), the stator (2) comprises a stator core (21), an inner protrusion (22) and a stator winding (23), the inner protrusion (22) and the stator winding (23) are both provided with a plurality of inner protrusions, and the inner protrusion (22) is uniformly and fixedly arranged on the inner side of the stator core (21), a plurality of stator winding (23) cup joint respectively and set up in a plurality of interior protruding portion (22) outsides, its characterized in that: stator core (21) inboard is provided with gasbag formula heat transfer mechanism (3), heat conduction gasbag (31) in gasbag formula heat transfer mechanism (3) inflate the inflation back and laminate with stator core (21) inside wall and stator winding (23) outer wall, gasbag formula heat transfer mechanism (3) both sides all are provided with air current feed mechanism (4), and two air current feed mechanism (4) all communicate with gasbag formula heat transfer mechanism (3), are located the left air current feed mechanism (4) left side top fixedly connected with filtration formula mechanism (5) of admitting air, are located the right side air current feed mechanism (4) right side bottom fixedly connected with exhaust mechanism (6), motor casing (1) top left side is from the left hand right hand side fixed in proper order be provided with linkage dust removal mechanism (7) and blow dirt mechanism (8).

2. The stator heat dissipation structure of a permanent magnet synchronous motor according to claim 1, characterized in that: gasbag formula heat transfer mechanism (3) are including heat conduction gasbag (31) and limiting plate (32), heat conduction gasbag (31) all are provided with a plurality ofly, a plurality of with limiting plate (32) heat conduction gasbag (31) and a plurality of stator winding (23) crisscross setting each other, limiting plate (32) bond and set up in one side of keeping away from stator core (21) inside wall in heat conduction gasbag (31).

3. The stator heat dissipation structure of a permanent magnet synchronous motor according to claim 2, characterized in that: the air flow communication mechanism (4) comprises an annular guide pipe (41), a horizontal guide pipe (42), a mounting ring (43) and a fixed rod (44), a plurality of horizontal guide pipes (42) are arranged, the plurality of horizontal guide pipes (42) are uniformly and fixedly arranged on one side of the annular guide pipe (41) close to the air bag type heat exchange mechanism (3), and the plurality of horizontal guide pipes (42) respectively fixedly penetrate through the outer sides of the plurality of heat conducting air bags (31) and are respectively communicated with the plurality of heat conducting air bags (31), the mounting ring (43) is positioned at the outer side of the annular guide pipe (41) and is fixedly connected with the inner wall of the motor shell (1), the number of the fixing rods (44) is multiple, the fixing rods (44) are distributed on the inner side of the mounting ring (43), one end of the fixed rod (44) is fixedly connected with the annular guide pipe (41), and the other end of the fixed rod (44) is fixedly connected with the inner wall of the mounting ring (43).

4. The stator heat dissipation structure of a permanent magnet synchronous motor according to claim 3, characterized in that: the filtering type air inlet mechanism (5) comprises a three-way air inlet pipe (51), a one-way valve (52), a lifting piston (53), a piston rod (54), a first linkage plate (55), a first nut (56), a reciprocating screw rod (57), a second bevel gear (58), a fixed seat (59), an air inlet channel (591) and a dust screen (592), wherein the three-way air inlet pipe (51) is fixedly connected with the inner wall of the motor shell (1), the exhaust end of the three-way air inlet pipe (51) penetrates through an annular guide pipe (41) in the left air flow communication mechanism (4) and is fixedly connected with the annular guide pipe (41), the two one-way valves (52) are arranged, the two one-way valves (52) are respectively and fixedly arranged at the air inlet end of the three-way air inlet pipe (51) and the exhaust end of the three-way air inlet pipe (51), and the lifting piston (53) is arranged inside the three-way air inlet pipe (51) in a sliding mode in the vertical direction, the utility model discloses a motor shell structure, including piston rod (54), first linkage board (55), reciprocal lead screw (57), second bevel gear (58), fixing set up in reciprocal lead screw (57) bottom, fixing base (59) rotate through the bearing cup joint set up in reciprocal lead screw (57) top, and fixing base (59) and motor shell (1) inner wall fixed connection, inlet passage (591) are seted up in motor shell (1) top and are communicate with tee bend intake pipe (51) inlet end, dust screen (592) are fixed to be set up in motor shell (1) top and cover and inlet passage (591) top, first nut (56) are fixed to be set up in piston rod (54) bottom, first nut (56) are fixed to be set up in first linkage board (55) left side, reciprocal lead screw (57) are located first nut (56) inboard and with first nut (56) threaded connection, second bevel gear (58) are fixed to be set up in reciprocal lead screw (57) bottom, fixing base (59) rotate to cup joint set up in reciprocal lead screw (57) top, and fixing base (59) and motor shell (1) inner wall fixed connection.

5. The stator heat dissipation structure of a permanent magnet synchronous motor according to claim 4, characterized in that: exhaust mechanism (6) include blast pipe (61) and exhaust passage (62), blast pipe (61) internal diameter is less than tee bend intake pipe (51) internal diameter, blast pipe (61) and motor casing (1) inner wall fixed connection, and its top is fixed to run through annular honeycomb duct (41) in right side air current communicating mechanism (4) and with this annular honeycomb duct (41) fixed connection, exhaust passage (62) run through and set up in motor casing (1) bottom right side, and communicate with blast pipe (61).

6. The stator heat dissipation structure of the permanent magnet synchronous motor according to claim 5, characterized in that: the linkage dust removal mechanism (7) comprises a mounting plate (71), a transverse plate (72), an unidirectional screw rod (73), a second nut (74), a driven gear (75), a rack rod (76), a lifting rod (77) and a second linkage plate (78), wherein the mounting plate (71) is provided with two mounting plates (71), the two mounting plates (71) are respectively positioned on two sides of a dust screen (592) and are fixedly connected with a motor shell (1), the transverse plate (72) is fixedly arranged between the two mounting plates (71), the unidirectional screw rod (73) penetrates through the two mounting plates (71) and is rotatably connected with the two mounting plates (71) through bearings, the second nut (74) is sleeved on the outer side of the unidirectional screw rod (73) and is in threaded connection with the unidirectional screw rod (73), a brush is fixedly arranged at the bottom of the second nut (74), the driven gear (75) is fixedly arranged at the left end of the unidirectional screw rod (73), rack bar (76) are located driven gear (75) rear side and mesh with driven gear (75), lifter (77) are fixed to be set up in rack bar (76) bottom, and run through motor casing (1) outer wall and extend to inside motor casing (1), simultaneously with motor casing (1) sliding connection, second linkage board (78) are fixed to be set up in lifter (77) bottom and with first nut (56) fixed connection.

7. The stator heat dissipation structure of a permanent magnet synchronous motor according to claim 6, characterized in that: blow dirt mechanism (8) and be responsible for (81), arc reposition of redundant personnel box (82) and reposition of redundant personnel branch pipe (83) including the reposition of redundant personnel, the reposition of redundant personnel is responsible for (81) bottom mounting and runs through tee bend intake pipe (51) and communicates with tee bend intake pipe (51), the reposition of redundant personnel is responsible for (81) top and runs through motor casing (1) inner wall and extend to motor casing (1) outside, arc reposition of redundant personnel box (82) are fixed to be set up in motor casing (1) top, and communicate with reposition of redundant personnel top of being responsible for (81), reposition of redundant personnel branch pipe (83) are provided with a plurality ofly, and are a plurality of reposition of redundant personnel branch pipe (83) are evenly fixed to be run through and set up in arc reposition of redundant personnel box (82) left side.