Traction machine integrating fan and traction wheel

Abstract

A traction machine integrating a fan and a traction wheel relates to the technology of traction machines and comprises a motor shell, a stator, a rotor, a rotating shaft and the traction wheel, the traction wheel is fixed on the rotating shaft and comprises a supporting sleeve, an outer ring and a plurality of fan blades, the outer surface of the outer ring is provided with a rope groove, and the fan blades are evenly distributed around the axis of the rotating shaft and connected between the supporting sleeve and the outer ring. The included angle between the fanning face of the fan blade and the axis of the rotating shaft is an acute angle, an air guide hole is formed in the side wall of the front end, facing the traction wheel, of the motor shell, and the fan blade, the air guide hole, the stator and the ventilation opening on the traction wheel form a cooling air channel. Compared with the prior art, the traction wheel has the advantages of being simple in structure, small in size, low in manufacturing cost, good in heat dissipation performance, convenient to replace and capable of being applied to the traction machine with the inner rotor and the outer rotor.

Description

Technical Field

[0001] The present invention relates to the technology of traction machines, in particular to a traction machine with a fan integrated with a traction wheel. Background Art

[0002] For traction machines used in elevators, due to the limitations of the use environment and conditions, natural cooling is generally adopted. Therefore, the traction machines are relatively large in volume and weight, and the cost is high. To reduce the cost and weight, setting a fan to cool the stator is the best way. Therefore, some people have the idea of additionally setting a fan on the rotating shaft of the traction machine. The fan is located inside the machine shell to ensure a smooth air guide channel. For such a traction machine, since the fan is additionally installed, inevitably, the overall volume of the traction machine is relatively large. Since the fan is installed inside the machine shell, its diameter cannot be greater than the diameter of the stator of the inner-rotor motor or the outer diameter of the outer rotor of the outer-rotor motor. Therefore, the air volume of the fan is limited; Some technologies additionally set an electric fan to inject cold air into the stator of the traction machine for cooling. For this technology, since the traction machine works for a long time, the fan is prone to damage after working for a long time, resulting in damage to the traction machine due to the inability to cool in time, thus affecting the overall reliability of the traction machine. Moreover, additionally setting a fan will result in a high manufacturing cost of the traction machine; To this end, the technology of the patent application CN202410250359.8, which integrates a traction wheel and a rotor, includes a machine base, a stator winding, and a rotor mechanism. The stator winding is installed on the machine base, and the rotor mechanism is installed on the machine base and is rotationally matched with the machine base. The stator winding has a second heat dissipation channel and a second heat dissipation port, and the rotor mechanism has a first heat dissipation channel and a first heat dissipation port. The first heat dissipation port, the first heat dissipation channel, the second heat dissipation channel, and the second heat dissipation port are sequentially connected; wherein, the rotor mechanism has a fan blade, the fan blade is located between the first heat dissipation port and the second heat dissipation port, and both ends of the fan blade are respectively installed on the mounting seat and the traction wheel, which can increase the connection strength between the mounting seat and the traction wheel, thereby improving the overall structural strength of the rotor mechanism. And the fan blade is located in the first heat dissipation channel, and the fan blade extends along the radial direction of the traction wheel. When the strength of the rotor mechanism is improved, the fan blade can also rotate with the rotor mechanism, so that the rotor mechanism can not only drive the traction wheel to rotate and provide power for the traction wheel, but also use the rotor mechanism as a fan to dissipate heat inside the traction machine, improving the practicability of the traction machine; moreover, the fan blade arranged in this way avoids occupying the space on the rotor mechanism, and the fan blade is cleverly installed in the first heat dissipation channel, improving the structural compactness of the traction machine and making the volume of the traction machine smaller. The first heat dissipation port, the first heat dissipation channel, the second heat dissipation channel, and the second heat dissipation port of this traction machine are sequentially connected. The first heat dissipation channel is used to absorb the heat generated by the rotor mechanism, and the second heat dissipation channel is used to absorb the heat generated by the stator winding; the rotor mechanism is rotationally matched with the machine base. When the rotor mechanism cooperates with the stator winding, the rotor mechanism rotates around the stator winding, and the rotor mechanism has a fan blade, and the fan blade is located between the first heat dissipation port and the second heat dissipation port, and the fan blade rotates with the rotor mechanism, so as to suck the air at the first heat dissipation port, make the air outside the traction machine flow into the first heat dissipation channel and the second heat dissipation channel, and accelerate the air flow in the heat dissipation channel, so that the air inside and outside the traction machine is exchanged with each other, and the heat inside the traction machine is discharged to the outside of the traction machine; to improve the problem that the existing traction machine cannot dissipate heat automatically. This kind of technology, because the rotor is suspended and supported on the base, is only suitable for the outer rotor structure and cannot be used for the inner rotor structure. In addition, the traction wheel and the rotor are designed as one body. When the traction wheel is worn, the traction wheel and the rotor need to be replaced at the same time, and the traction wheel cannot be replaced alone. Firstly, the maintenance cost is high, and secondly, the maintenance workload is large. Since the rotating shaft cannot be set, the traction wheel cannot be supported by the rotating shaft. In order to ensure reliability, the material and processing quality requirements of the traction wheel are high, resulting in high manufacturing costs. Summary of the Invention

[0003] The object of the present invention is to provide a traction machine with an integrated fan and traction wheel that has a simple structure, small volume, low manufacturing cost, good heat dissipation performance, convenient replacement of the traction wheel, and can be applied to both inner and outer rotor traction machines.

[0004] The present invention is implemented as follows: It includes a motor housing, a stator and a rotor arranged inside the motor housing, a rotating shaft rotatably arranged inside the motor housing and driven by the rotor, and a traction wheel. The traction wheel is fixed on the rotating shaft that penetrates outside the motor housing. The special feature is that the traction wheel includes a support sleeve, an outer ring with a rope groove on its outer circular surface, and several fan blades. The fan blades are evenly distributed around the axis of the rotating shaft and are connected between the support sleeve and the outer ring. The angle between the air blowing surface of the fan blade and the axis of the rotating shaft is an acute angle. A wind guiding hole is provided on the front side wall of the motor housing facing the traction wheel, and a ventilation opening is provided on the motor housing. The ventilation opening is located at other parts of the motor housing except the front side wall. The fan blade part, the wind guiding hole, the stator part, and the ventilation opening on the traction wheel form a cooling air duct.

[0005] During operation, the rotor rotates along the axis of the stator, driving the rotating shaft to rotate. The rotating shaft drives the traction wheel to rotate, driving the traction rope wound around the traction wheel to move, so as to drive the elevator car to move up and down through the traction rope. While the traction wheel rotates, the fan blades on the traction wheel blow air. When the fan blades blow air towards the wind guiding hole, the outside air enters the motor housing through the wind guiding hole, flows through the stator coil and the gap between the stator and the rotor, and then the hot air is discharged from the ventilation opening of the motor housing, taking away the heat energy generated by the operation of the stator and the rotor to reduce the temperature of the stator; when the fan blades blow air away from the wind guiding hole, a negative pressure is formed in the wind guiding hole, and the air inside the motor housing is pumped out. The outside air is introduced from the ventilation opening of the motor housing, flows through the stator coil and the gaps between the stator and the rotor, takes away the heat energy generated by the operation of the stator and the rotor, and then is discharged from the wind guiding hole, thereby reducing the temperature of the stator. Since the traction wheel is integrated with the fan blades, and moreover, the traction wheel does not need to be connected to the rotor as a whole, both the inner and outer rotor structures can use the traction wheel with fan blades, and the traction wheel can be driven to work in the form of a rotating shaft. When the traction wheel is damaged and needs to be repaired, it is convenient to replace and repair the traction wheel. Moreover, the structure is simple, the volume is small, and the manufacturing cost is low. The inclined structure of the fan blades has high air blowing efficiency and large air blowing volume, ensuring the air volume required for heat dissipation.

[0006] Compared with the prior art, the present invention has the advantages of simple structure, small volume, low manufacturing cost, good heat dissipation performance, convenient replacement of the traction wheel, and can be applied to both inner and outer rotor traction machines. Description of the Drawings

[0007] Figure 1 It is a schematic structural diagram of Embodiment 1 of the traction machine with the fan and the traction wheel integrated in the present invention; Figure 2 It is an exploded view of Embodiment 1; Figure 3 It is Figure 1 the A-A cross-sectional view of Figure 4 It is a schematic structural diagram of Embodiment 2 of the traction machine with the fan and the traction wheel integrated in the present invention; Figure 5 Structural schematic diagram of Embodiment 3 of the traction machine with the fan and the traction wheel integrated as one of the present invention; Figure 6 Structural schematic of Embodiment 4 of the traction machine with the fan and the traction wheel integrated as one of the present invention; Figure 7 Is a three-dimensional view of the traction wheel.

[0008] Label description: 1 - motor housing; 101 - motor base; 102 - first base; 103 - first front end cover; 104 - stator fixing ring; 105 - second base; 106 - first rear end cover; 107 - third base; 108 - second front end cover; 109 - fourth base; 110 - second rear end cover; 2 - stator; 3 - rotor; 4 - rotating shaft; 5 - traction wheel; 501 - support sleeve; 502 - rope groove; 503 - outer ring; 504 - fan blade; 505 - middle of the back; 6 - air guide hole; 7 - ventilation opening; 8 - front bearing seat; 9 - rear bearing seat; 10 - bearing; 11 - air guide plate; 12 - slit-type air outlet; 13 - air guide cover; 1301 - cover opening; 14 - connecting piece; 1401 - fixing ring; 15 - air hole. Detailed implementation manners

[0009] The traction machine with the fan and the traction wheel integrated as one of the present invention will be further described in detail with reference to the accompanying drawings and embodiments: Embodiment 1: As Figure 1 —3 shows, the traction machine with the fan and the traction wheel integrated as one of the present invention includes a motor housing 1 with a motor base 101, a stator 2 and a rotor 3 arranged in the motor housing 1, a rotating shaft 4 rotatably arranged in the motor housing 1 and driven by the rotor 3, and a traction wheel 5. The traction wheel 5 is fixed on the rotating shaft 4 extending out of the motor housing 1. As Figure 1 、 2 shown, its special feature is that the traction wheel 5 includes a support sleeve 501, an outer ring 503 with a rope groove 502 on its outer surface, and several fan blades 504. The fan blades 504 are evenly distributed around the axis D of the rotating shaft and are connected between the support sleeve 501 and the outer ring 502. The angle between the air blowing surface of the fan blade 504 and the axis D of the rotating shaft is an acute angle. An air guide hole 6 is provided on the side wall of the motor housing 1 facing the traction wheel 5, and a ventilation opening 7 is provided on the motor housing 1.

[0010] Preferably, front bearing seats 8 and rear bearing seats 9 are respectively arranged at the axes of the front end and the rear end of the motor housing 1. The rotating shaft 4 is rotatably arranged on the bearings 10 of the front bearing seat 8 and the rear bearing seat 9. The front bearing seat 8 protrudes from the front end face of the motor housing 1. Correspondingly, the middle part 505 of the back surface of the traction wheel 5 is concave, so that the front end of the front bearing seat 8 extends into the concave middle part 505 of the back surface of the traction wheel 5, and there is only a very small gap between the outer edge of the side surface of the traction wheel 5 and the front end of the motor housing 1, so that the air blown by the fan blades 504 of the traction wheel 5 will not diffuse to the outside of the motor from the gap between the traction wheel 5 and the front end of the motor housing 1, but will accurately flow to the end and be seamlessly connected to the air guide hole 6, so that the cooling air can smoothly flow through the air guide hole 6.

[0011] By adopting the front bearing seat 8 protruding from the front end face of the motor housing 1, by avoiding the interference of the front bearing seat 8 on the setting of the stator 2, the motor housing 1 is narrow, the housing of the motor housing 1 is thin, and the installation space is small, and the stator 2 can also be reliably installed, realizing the technical effects of the whole traction machine being narrow and small in volume.

[0012] Preferably, a wind guide plate 11 is arranged on the outer end face of the traction wheel 5; slit-shaped air vents 12 are arranged along the circumferential surface of the wind guide plate 11. By adopting the slit-shaped air vents 12, large external objects can be effectively blocked from being sucked by the fan and entering the stator 2.

[0013] Preferably, the slit-shaped air vents 12 are radially distributed with the center of the wind guide plate 11 as the center. A wind guide cover 13 is arranged outside the slit-shaped air vents 12. The cover opening 1301 of the wind guide cover 13 is perpendicular to the rotation direction of the traction wheel 5 to facilitate the entry and exit of air; when the fan blades 504 blow air towards the air guide hole 6, the cover opening 1301 of the wind guide cover 13 faces the wind so that the air can be injected into the slit-shaped air vents 12; when the fan blades 504 blow air towards the outside of the traction wheel 5 to make the air flow from the stator 2 to the outside of the air guide hole, the cover opening 1301 of the wind guide cover 13 faces away from the wind so that the air can flow out from the slit-shaped air vents 12.

[0014] Preferably, the motor housing 1 includes a first housing 102 with a rear bearing seat 9 and a first front end cover 103 with an air guide hole 6. The front end of the first housing 102 is open. The motor base 101 is arranged at the bottom of the first housing 102. The front bearing seat 8 is arranged on the first front end cover 103. The first front end cover 103 is fixed to the open front end of the first housing 102 by bolts. A stator fixing ring 104 is arranged on the back surface of the first front end cover 103. The stator 2 is fixed on the stator fixing ring 104. The rotating shaft 4 passing through the stator fixing ring 104 is rotatably connected to the bearings of the front bearing seat 8 and the rear bearing seat 9. The rotor 3 is an outer rotor and is fixedly connected to the rear end of the rotating shaft 4 in front of the rear bearing seat 9 through a disc-shaped connecting member 14 with a fixing ring 1401 fixed on the rotating shaft 4. The disc-shaped connecting member 14 is provided with several air holes 15. The fan blade 504 of the traction wheel 5, the air guide hole 6, the stator 2, the air holes 15, and the ventilation port 7 form a cooling air duct.

[0015] The rotor 3 drives the rotation of the rotating shaft 4, the rotating shaft 4 drives the rotation of the traction wheel 5, and the fan blades 504 on the traction wheel 5 drive the cooling air flow through the stator 2. The fan blades 504, air guiding holes 6, stator 2, air holes 15, and ventilation openings 7 on the traction wheel 5 form a cooling air duct to discharge the heat energy dissipated by the stator 2 outside the motor housing 1 to ensure the normal operation of the traction machine.

[0016] The ventilation opening 7 is provided at one or more of the peripheral wall and the back wall of the first machine base 102.

[0017] Embodiment 2: As Figure 4 shown, based on Embodiment 1, the motor housing 1 includes a second machine base 105 with a front bearing seat 8 and air guiding holes 6, and a first rear end cover 106 with a rear bearing seat 9. The rear end of the second machine base 105 is open. The motor feet 101 are provided at the bottom of the second machine base 105. The first rear end cover 106 is fixed to the open rear end of the second machine base 105 by bolts. A stator fixing ring 104 is provided at the rear of the second machine base 105, and the stator 2 is fixed to the stator fixing ring 104. The rotating shaft 4 passing through the stator fixing ring 104 is rotatably connected to the bearings of the front bearing seat 8 and the rear bearing seat 9. The rotor 3 is an outer rotor and is fixedly connected to the rear end of the rotating shaft 4 in front of the rear bearing seat 9 through a disc-shaped connecting member 14 with a fixing ring 1401 fixed to the rotating shaft 4. The disc-shaped connecting member 14 is provided with several air holes 15. The fan blades 504, air guiding holes 6, stator 2, air holes 15, and ventilation openings 7 on the traction wheel 5 form a cooling air duct.

[0018] Embodiment 3: As Figure 5 shown, the motor housing 1 includes a third machine base 107 with a rear bearing seat 9 and a second front end cover 108 with air guiding holes 6. The front end of the third machine base 107 is open. The motor feet 101 are provided at the bottom of the third machine base 107. The front bearing seat 8 is provided on the second front end cover 108. The second front end cover 108 is fixed to the open front end of the third machine base 107 by bolts. The annular stator 2 is fixed to the annular inner wall of the third machine base 107. The rotating shaft 4 passes through the annular stator 2 and is then rotatably connected to the bearings of the front bearing seat 8 and the rear bearing seat 9. The rotor 3 located inside the annular stator 2 is an inner rotor and is fixed to the rotating shaft 4. The fan blades 504, air guiding holes 6, stator 2, and ventilation openings 7 on the traction wheel 5 form a cooling air duct.

[0019] Embodiment 4: As Figure 6As shown in the figure, the motor housing 1 includes a fourth housing 109 with a front bearing seat 8 and a second rear end cover 110 with a rear bearing seat 9. The rear end of the fourth housing 109 is open. The motor feet 101 are arranged at the bottom of the fourth housing 109. The second rear end cover 110 is fixed to the open rear end of the fourth housing 109 by bolts. The annular stator 2 is fixed to the annular inner wall of the fourth housing 109. The rotating shaft 4 passes through the annular stator 2 and is rotatably connected to the bearings of the front bearing seat 8 and the rear bearing seat 9. The rotor 3 located inside the annular stator 2 is an inner rotor and is fixed to the rotating shaft 4. The fan blade 504 on the traction wheel 5, the air guiding holes 6, the stator 2, and the ventilation openings 7 form a cooling air duct.

Claims

1. A traction machine with a fan and a traction wheel integrated into one, comprising a motor housing, a stator and a rotor arranged in the motor housing, a rotating shaft driven by the rotor and rotatably arranged in the motor housing, and a traction wheel, wherein the traction wheel is fixed on the rotating shaft passing through the motor housing, and is characterized in that: The traction wheel includes a supporting sleeve, an outer ring with rope grooves on the outer surface, and several fan blades. The fan blades are evenly distributed around the axis of the rotating shaft and connected between the supporting sleeve and the outer ring. The angle between the fan surface of the fan blade and the axis of the rotating shaft is an acute angle. An air guide hole is provided on the front end side wall of the motor casing facing the traction wheel. The motor casing is provided with a vent. The vent is located at other parts of the motor casing except the front end side wall. The fan blades, air guide holes, stator and vent on the traction wheel constitute a cooling air duct.

2. The traction machine with integrated fan and traction wheel according to claim 1, characterized in that: A front bearing seat and a rear bearing seat are respectively arranged at the axis of the front end and the rear end of the motor housing, and the rotating shaft is rotatably arranged on the bearings of the front bearing seat and the rear bearing seat.

3. The traction machine with integrated fan and traction wheel according to claim 2, characterized in that: The motor housing includes a first base with a rear bearing seat, a first front end cover with an air guide hole and a front bearing seat, the front end of the first base is open, the first front end cover is fixed on the front end opening of the first base, a stator fixing ring is arranged on the back of the first front end cover, the stator is fixed on the stator fixing ring, the rotating shaft passing through the stator fixing ring is rotatably connected to the bearings of the front bearing seat and the rear bearing seat, the rotor is an outer rotor and is fixedly connected to the rear end of the rotating shaft in front of the rear bearing seat through a connecting piece with a fixing ring fixed on the rotating shaft, the connecting piece is provided with a plurality of air holes, and the fan blades, air guide holes, stator, air holes and vents on the traction wheel constitute a cooling air duct.

4. The traction machine with integrated fan and traction wheel according to claim 2, characterized in that: The motor housing includes a second base with a front bearing seat and an air guide hole, a first rear end cover with a rear bearing seat, the rear end of the second base is open, the first rear end cover is fixed to the rear end opening of the second base, a stator fixing ring is arranged at the rear of the second base, the stator is fixed on the stator fixing ring, a rotating shaft passing through the stator fixing ring is rotatably connected to the bearings of the front bearing seat and the rear bearing seat, the rotor is an outer rotor and is fixedly connected to the rear end of the rotating shaft in front of the rear bearing seat through a connecting piece with a fixing ring fixed on the rotating shaft, the connecting piece is provided with a plurality of air holes, and the fan blades, air guide holes, stator, air holes and vents on the traction wheel constitute a cooling air duct.

5. The traction machine with integrated fan and traction sheave according to claim 2, characterized in that: The motor housing includes a third base with a rear bearing seat, a second front end cover with an air guide hole and a front bearing seat, the front end of the third base is open, the second front end cover is fixed on the front end opening of the third base, the stator is fixed on the annular inner wall of the third base, the rotating shaft passes through the stator and is rotatably connected to the bearings of the front bearing seat and the rear bearing seat, the rotor located in the stator is an inner rotor and is fixed on the rotating shaft, and the fan blades, air guide holes, stator and vents on the traction wheel constitute a cooling air duct.

6. The traction machine with integrated fan and traction sheave according to claim 2, characterized in that: The motor housing includes a fourth base with a front bearing seat and a second rear end cover with a rear bearing seat. The rear end of the fourth base is open, the second rear end cover is fixed to the rear end opening of the fourth base, the stator is fixed to the annular inner wall of the fourth base, the rotating shaft passes through the stator and is rotatably connected to the bearings of the front bearing seat and the rear bearing seat, the rotor located in the stator is an inner rotor and is fixed on the rotating shaft, and the fan blades, air guide holes, stator and vents on the traction wheel constitute a cooling air duct.

7. The traction machine with integrated fan and traction wheel according to claim 2, 3, 4, 5 or 6, characterized in that: The front bearing seat protrudes from the front end surface of the motor housing, and correspondingly, the middle part of the back side of the traction wheel is concave, so that the front end of the front bearing seat extends into the middle part of the concave back side of the traction wheel, and the outer edge of the back side of the traction wheel is close to the front end of the motor housing, so that the fan blade air blowing end of the traction wheel is almost seamlessly connected to the air guide hole, so that the heat dissipation wind can flow smoothly through the air guide hole, avoiding the infiltration of outside air from the gap between the traction wheel and the front end of the motor housing to interfere with the smooth flow of the heat dissipation wind.

8. The traction machine with integrated fan and traction wheel according to claim 1, 2, 3, 4, 5 or 6, characterized in that: An air guide plate is arranged on the outer end surface of the traction wheel, and slit-type air outlets are arranged along the circumference of the air guide plate.

9. The traction machine with integrated fan and traction sheave according to claim 8, characterized in that: The slit air outlets are distributed radially with the center of the air guide plate as the center. An air guide cover is arranged outside the slit air outlet. The cover opening of the air guide cover is perpendicular to the rotation direction of the traction wheel to facilitate the entry and exit of wind.

10. The traction machine with integrated fan and traction sheave according to claim 7, characterized in that: An air guide plate is arranged on the outer end surface of the traction wheel, and slit-type air outlets are arranged along the circumference of the air guide plate.

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