Traction machine with heat dissipation structure and heat dissipation method

Abstract

The application discloses a traction machine with a heat dissipation structure and a heat dissipation method, and belongs to the technical field of traction machines. The traction machine comprises a first support frame, a second support frame, a traction shaft and a traction wheel. The traction wheel is sleeved on the traction shaft. The two ends of the traction shaft are respectively mounted on the first support frame and the second support frame. A bearing assembly is arranged between the traction shaft and the first support frame and the second support frame. The traction shaft is rotationally connected with the first support frame and the second support frame through the two bearing assemblies. The first support frame is provided with a stator. The traction wheel is provided with a rotor matched with the stator. The stator and the rotor have a gap therebetween. A first air inlet hole and a first air inlet channel are formed in the first support frame. The traction wheel and the first support frame are provided with a first air outlet channel and a first air outlet hole. The first air inlet hole, the first air inlet channel, the gap, the first air outlet channel and the first air outlet hole are sequentially connected and form a heat dissipation channel. The heat dissipation channel is used for dissipating heat of the stator, the rotor and the bearing assembly.

Description

Technical Field

[0001] This invention relates to the technical field of traction machines, and in particular to a traction machine with a heat dissipation structure and a heat dissipation method. Background Technology

[0002] With the development of super high-rise buildings in China, the application of ultra-high-speed elevators is becoming increasingly widespread in the domestic market. Currently, the traction machines used in ultra-high-speed elevators are divided into two types: dual-support permanent magnet synchronous internal rotor and external rotor structures, with the internal rotor being the mainstream. These products generally suffer from key technical problems such as large external dimensions, especially axial dimensions, heavy weight, and complex structures. This results in large space requirements for the elevator's machine room, increasing the construction cost of high-rise buildings and failing to meet market demands for high-performance, high-efficiency, small-volume, and lightweight elevator traction machines. Therefore, developing permanent magnet synchronous traction machines with small external dimensions, especially axial dimensions, light weight, and a simple and compact structure would be more suitable for small machine room applications and could further enhance the product's market competitiveness.

[0003] In existing technologies, such as axially excited traction machines, two axially excited motors are typically arranged symmetrically on the left and right, with a traction sheave between them. This type of traction machine has a relatively short axial length, making it suitable for small machine room applications. However, during installation, due to manufacturing precision errors and fit tolerances in the components, an unbalanced magnetic force exists in the axial direction of the traction machine. This forces the bearings to withstand a certain axial force, thus affecting their service life. Furthermore, when the traction sheave and its main bearings are subjected to large loads, deformation can easily occur, resulting in uneven clearance between the disc rotor and the stator, thereby affecting the electrical performance stability of the motor.

[0004] In existing technologies, such as Chinese Patent No. CN202411326969.8, a traction machine with dual motors and its assembly method are disclosed. This method changes the magnetic field direction of the permanent magnet, solving the problem of unbalanced load-bearing capacity in the axial direction. However, in this traction machine, the internal heat dissipation channel has low heat dissipation efficiency, and the motor components are prone to overheating, resulting in insufficient work efficiency. The internal structure of the traction machine is complex, making it difficult to improve heat dissipation efficiency without changing the overall structure. Moreover, existing heat dissipation channels generally focus primarily on motor cooling, failing to address bearing cooling. This leads to severe bearing overheating, and improper use can easily shorten bearing life. Summary of the Invention

[0005] The purpose of this invention is to improve the problem of low heat dissipation efficiency in existing traction machines, which leads to the inability to maximize work efficiency and also fails to address the issue of bearing heat dissipation, and to provide a traction machine with a heat dissipation structure and a heat dissipation method.

[0006] The technical solutions for achieving the above objectives include the following:

[0007] A traction machine with a heat dissipation structure includes: the traction machine includes a first support frame, a second support frame, a traction shaft, and a traction wheel, the traction wheel is sleeved on the traction shaft, the two ends of the traction shaft are respectively installed on the first support frame and the second support frame, and bearing assemblies are provided between the traction shaft and the first support frame and the second support frame, and the traction shaft is rotatably engaged with the first support frame and the second support frame through the two bearing assemblies;

[0008] The first support frame has a stator, the traction sheave has a rotor that cooperates with the stator, and there is a gap between the stator and the rotor; the first support frame is provided with a first air inlet hole and a first air inlet channel, the first air inlet channel is located between the bearing assembly and the stator, and there is a first air outlet channel and a first air outlet hole between the traction sheave and the first support frame;

[0009] The first air inlet, the first air inlet channel, the gap, the first air outlet channel, and the first air outlet are connected in sequence to form a heat dissipation channel, and the heat dissipation channel is arranged around the stator; the heat dissipation structure is installed on the first support frame and is arranged close to the first air inlet, and the air outlet direction of the heat dissipation structure is towards the first air inlet.

[0010] In one embodiment, the first support frame is further provided with a second air inlet and a second air inlet channel, the stator is provided with a third air inlet channel, the second air inlet, the second air inlet, and the third air inlet channel are connected in sequence, and the air outlet surface of the heat dissipation structure covers the first air inlet and the second air inlet;

[0011] The first air inlet channel is located close to the bearing assembly, and the second and third air inlet channels are on the same straight line.

[0012] There is a converging chamber between the stator and the traction sheave. The first air inlet channel and the third air inlet channel are both connected to the first end of the converging chamber, and the second end of the converging chamber is connected to the gap.

[0013] In one embodiment, the first support frame further has a second air outlet and a second air outlet channel, the second air outlet is connected to the first end of the second air outlet channel, and the second end of the second air outlet channel is connected to the gap;

[0014] The second air outlet channel intersects with the first air outlet channel;

[0015] The second air outlet channel is offset from the first air inlet channel or the second air inlet channel in the radial direction of the traction shaft.

[0016] In one embodiment, the first support frame has a first outer surface and a second outer surface, which are located on two adjacent sides of the first support frame; the first air inlet, the second air inlet, and the second air outlet are all disposed on the first outer surface;

[0017] The first air outlet is located on the second outer surface.

[0018] In one embodiment, the first air inlet channel, the second air inlet channel, the third air inlet channel, and the second air outlet channel all extend along the axis of the traction shaft.

[0019] The first air inlet channel and the second air inlet channel are arranged in parallel, and the second air inlet channel and the second air outlet channel are arranged in parallel;

[0020] The first air outlet duct extends radially along the traction shaft.

[0021] In one embodiment, the heat dissipation structure has at least two, wherein one heat dissipation structure is mounted on a first support frame and the other heat dissipation structure is mounted on a second support frame;

[0022] The heat dissipation channel has two channels, which are located on both sides of the traction sheave respectively; one of the heat dissipation structures corresponds to the first heat dissipation channel, and the other second heat dissipation structure corresponds to the second heat dissipation channel.

[0023] The air outlet directions of the two heat dissipation structures are arranged opposite to each other.

[0024] In one embodiment, a first ventilation groove is provided inside the traction sheave, the first ventilation groove extending from one side of the traction sheave to the other side, and the two ends of the first ventilation groove are respectively connected to a first heat dissipation channel and a second heat dissipation channel.

[0025] In one embodiment, the heat dissipation channel has four channels: the first heat dissipation channel and the third heat dissipation channel are disposed on the first side of the traction sheave and are located at the upper end and the lower end of the traction sheave, respectively; the second heat dissipation channel and the fourth heat dissipation channel are disposed on the second side of the traction sheave and are located at the upper end and the lower end of the traction sheave, respectively.

[0026] The two bearing assemblies are provided with two second ventilation slots between the two sides of the traction sheave. The first heat dissipation channel is connected to the third heat dissipation channel through one of the second ventilation slots, and the second heat dissipation channel is connected to the fourth heat dissipation channel through the other second ventilation slot.

[0027] In one embodiment, the traction sheave has a brake disc, the first support frame has a brake, the brake includes two brake pads, the brake disc is located between the two brake pads, and the two brake pads are used to abut against the brake disc;

[0028] One of the brake pads forms a fitting air gap with the brake disc, and the fitting air gap is connected to the first air outlet channel.

[0029] This invention also proposes a heat dissipation method for a traction machine with a heat dissipation structure, comprising the following steps:

[0030] Step 1: After the stator of the traction machine is energized, the stator and rotor cooperate and drive the traction wheel to rotate;

[0031] Step 2: Activate the heat dissipation structure. The heat dissipation structure accelerates the airflow near the traction machine, and the air accelerates into the first air inlet channel through the first air inlet hole and passes through the gap. The airflow carries away the heat from the bearing assembly, stator, and rotor, and the hot air flows out from the first air outlet channel.

[0032] The technical solution provided by this invention has the following advantages and effects:

[0033] On one hand, when the motor assembly starts, the heat dissipation structure blows air towards the first air inlet, accelerating the airflow speed at the first air inlet. This causes cold air to enter the gap from the first air inlet channel. The gap is located between the stator and the rotor, where heat exchange occurs between the cold air and the stator and rotor, forming hot air within the gap. This hot air is then discharged through the first air outlet channel and the first air outlet hole, thus achieving heat dissipation for the motor assembly. The first air inlet hole, the first air inlet channel, the gap, the first air outlet channel, and the first air outlet hole are sequentially connected, forming a heat dissipation channel that surrounds the stator. Therefore, the air flowing through the heat dissipation channel will inevitably flow around the stator, carrying away most of the heat from the stator's outer surface. The rotor also needs to be positioned close to the stator, and its heat will also be carried away by the airflow, thereby improving the heat dissipation efficiency of the motor assembly.

[0034] On the other hand, the first air inlet channel is located between the bearing assembly and the stator. Therefore, when the bearing in the bearing assembly rotates, the heat generated by it can also be carried away by the air in the first air inlet channel. This ensures that the heat dissipation channel can simultaneously dissipate heat from the motor assembly and the bearing, improving the working efficiency of the motor assembly and extending the service life of the bearing. Compared to existing technologies, this heat dissipation channel is arranged along the outer periphery of the stator and flows towards the gap between the stator and the rotor. The air flowing within the heat dissipation channel can inevitably carry away the heat generated by the motor assembly and the bearing, thereby greatly improving the heat dissipation efficiency of the traction machine. Attached Figure Description

[0035] The accompanying drawings illustrate specific examples of the technical solutions described in this invention and, together with the detailed embodiments, form part of the specification, serving to explain the technical solutions, principles, and effects of this invention.

[0036] Unless otherwise specified or defined, the same reference numerals in different figures represent the same or similar technical features, and different reference numerals may be used to represent the same or similar technical features.

[0037] Figure 1 This is a schematic diagram of a traction machine with a heat dissipation structure according to an embodiment of the present invention;

[0038] Figure 2 This is a cross-sectional view of a traction machine with a heat dissipation structure according to an embodiment of the present invention;

[0039] Figure 3 This is one embodiment of the present invention. Figure 2 Enlarged view of point A;

[0040] Figure 4 This is a side view of a traction machine with a heat dissipation structure according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the first support frame in one embodiment of the present invention;

[0042] Figure 6 This is a front view of the first support frame in one embodiment of the present invention;

[0043] Figure 7 This is a front view of the iron core in one embodiment of the present invention;

[0044] Explanation of reference numerals in the attached figures:

[0045] 100. Traction machine;

[0046] 1. Base; 21. First support frame; 211. First outer surface; 212. Second outer surface; 22. Second support frame; 23. Bearing assembly; 3. Traction shaft; 4. Traction sheave; 41. Rope groove; 42. Brake disc; 43. First ventilation groove; 44. Traction rope; 5. Stator; 51. Iron core; 511. Through hole; 6. Rotor; 7. Brake; 71. Brake pad; 8. Junction box; 9. Encoder;

[0047] 200. Heat dissipation channel; 110. Heat dissipation structure; 101. First air inlet; 102. First air inlet channel; 103. Converging chamber; 104. Gap; 105. First air outlet channel; 106. Second air outlet channel; 107. First air outlet; 108. Second air outlet; 109. Second ventilation slot; 201. Second air inlet; 202. Second air inlet channel; 203. Third air inlet channel;

[0048] 211. First heat dissipation channel; 212. Second heat dissipation channel; 213. Second heat dissipation channel; 214. Second heat dissipation channel. Detailed Implementation

[0049] To facilitate understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0050] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0051] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the related listed items.

[0052] It should be noted that when a component is considered "fixed" to another component, it can be directly fixed to the other component or there can be an intervening component; when a component is considered "connected" to another component, it can be directly connected to the other component or there can be an intervening component; when a component is considered "mounted" on another component, it can be directly mounted on the other component or there can be an intervening component; when a component is considered "placed" on another component, it can be directly placed on the other component or there can be an intervening component.

[0053] In existing technologies, if an air outlet channel and an air inlet channel are respectively provided at the upper and lower ends of the traction sheave shaft, testing has shown that when the traction sheave shaft rotates, it is difficult for the air in the air inlet channel at the lower end of the traction sheave shaft to completely pass through the ventilation slot and enter the air outlet channel. This is because the traction sheave shaft generates centrifugal force when rotating, which agitates the airflow in the ventilation slot, preventing the air in the air inlet channel from completely passing through the ventilation slot and entering the air outlet channel, resulting in low heat dissipation efficiency. Therefore, this invention proposes a traction machine 100 with a heat dissipation structure 110.

[0054] like Figures 1 to 7As shown, the traction machine 100 includes a first support frame 21, a second support frame 22, a traction shaft 3, a traction sheave 4, and a base 1. The first support frame 21 and the second support frame 22 are both mounted on the base 1. The traction sheave 4 is sleeved around the traction shaft 3. Both ends of the traction shaft 3 are respectively mounted on the first support frame 21 and the second support frame 22. Bearing assemblies 23 are provided between the traction shaft 3 and both the first support frame 21 and the second support frame 22, allowing the traction shaft 3 to rotate with the first support frame 21 and the second support frame 22 via the two bearing assemblies 23. The first support frame 21 has a stator 5, and the traction sheave 4 has a rotor 6 that cooperates with the stator 5. A gap 1 is provided between the stator 5 and the rotor 6. 04; The first support frame 21 is provided with a first air inlet 101 and a first air inlet channel 102. The first air inlet channel 102 is located between the bearing assembly 23 and the stator 5. The traction wheel 4 and the first support frame 21 are provided with a first air outlet channel 105 and a first air outlet 107. The first air inlet 101, the first air inlet channel 102, the gap 104, the first air outlet channel 105, and the first air outlet 107 are connected in sequence to form a heat dissipation channel 200, and the heat dissipation channel 200 is arranged around the stator 5. The heat dissipation structure 110 is installed on the first support frame 21 and is arranged close to the first air inlet 101. The air outlet direction of the heat dissipation structure 110 is towards the first air inlet 101.

[0055] Specifically, the rotor 6 on the traction sheave 4 cooperates with the stator 5 on the first support frame 21. After the stator 5 conducts electricity, it drives the rotor 6 to rotate, which in turn drives the traction sheave 4 to rotate. The stator 5 and the rotor 6 form a motor assembly. The two ends of the traction shaft 3 are rotatably connected to the first support frame 21 and the second support frame 22 through two bearing assemblies 23. Both the first support frame 21 and the second support frame 22 are equipped with stators 5, and the traction sheave 4 is also equipped with rotors 6 on both sides. Therefore, the traction machine 100 has two axial excitation structures, and the two motor assemblies are symmetrically arranged on the left and right.

[0056] Furthermore, when the motor assembly starts, the heat dissipation structure 110 blows air towards the first air inlet 101 and accelerates the airflow speed of the first air inlet 101, causing cold air to enter the gap 104 from the first air inlet channel 102. The gap 104 is located between the stator 5 and the rotor 6, where the cold air exchanges heat with the stator 5 and the rotor 6, forming hot air within the gap 104. The hot air is then discharged through the first air outlet channel 105 and the first air outlet 107, thereby achieving heat dissipation for the motor assembly. The first air inlet 101, the first air inlet channel 102, the gap 104, the first air outlet channel 105, and the first air outlet 107 are sequentially connected, forming a heat dissipation channel 200 that surrounds the stator 5. Therefore, the air in the heat dissipation channel 200 will inevitably flow around the stator 5, thus carrying away most of the heat from the outer surface of the stator 5. The rotor 6 also needs to be located close to the stator 5, and the heat from the rotor 6 will also be carried away by the airflow, thereby improving the heat dissipation efficiency of the motor assembly.

[0057] Furthermore, the first air inlet channel 102 is located between the bearing assembly 23 and the stator 5. Therefore, when the bearing in the bearing assembly 23 rotates, the heat generated by it can also be carried away by the air in the first air inlet channel 102. This ensures that the heat dissipation channel 200 can simultaneously dissipate heat from the motor assembly and the bearing, improving the working efficiency of the motor assembly and extending the service life of the bearing. Compared to the prior art, this heat dissipation channel 200 is arranged along the outer periphery of the stator 5 and flows towards the gap 104 between the stator 5 and the rotor 6. The air flowing within the heat dissipation channel 200 can inevitably carry away the heat generated by the motor assembly and the bearing, thereby greatly improving the heat dissipation efficiency of the traction machine 100.

[0058] Preferably, the heat dissipation structure 110 is a fan or a blower.

[0059] In this embodiment, the traction machine 100 also includes a junction box 8 and an encoder 9. The encoder 9 is mounted on the traction shaft 3, and the junction box 8 is mounted on the first support frame 21 or the second support frame 22. The encoder 9 is used to monitor the rotational speed of the traction shaft 3, and the junction box 8 is used to store the wires connecting the stator 5 and the brake 7.

[0060] To further improve the heat dissipation efficiency of the traction machine 100, preferably, the first support frame 21 is also provided with a second air inlet 201 and a second air inlet channel 202, and the stator 5 is provided with a third air inlet channel 203. The second air inlet 201, the second air inlet channel 202, and the third air inlet channel 203 are connected in sequence, and the air outlet surface of the heat dissipation structure 110 covers the first air inlet 101 and the second air inlet 201. The first air inlet channel 102 is located close to the bearing assembly 23, and the second air inlet channel 202 and the third air inlet channel 203 are on the same straight line. There is a converging chamber 103 between the stator 5 and the traction sheave 4. The first air inlet channel 102 and the third air inlet channel 203 are both connected to the first end of the converging chamber 103, and the second end of the converging chamber 103 is connected to the gap 104.

[0061] Specifically, since the second air intake channel 202 and the third air intake channel 203 are on the same straight line, the air resistance in the heat dissipation channel 200 is reduced, and the airflow attenuation phenomenon is avoided when it enters the third air intake channel 203. When the heat dissipation structure 110 is activated, the air in the second air intake channel 202 and the third air intake channel 203 passes through the lower end of the stator 5 and enters the converging chamber 103, realizing the first heat dissipation of the stator 5.

[0062] Furthermore, the first air inlet channel 102 is located close to the bearing assembly 23, and the air in the first air inlet channel 102 also enters the converging chamber 103. The first air inlet channel 102 is the first heat dissipation air duct, while the second air inlet channel 202 and the third air inlet channel 203 form the second heat dissipation air duct. The bearing assembly 23 and the stator 5 have their respective corresponding heat dissipation air ducts. The airflow in the converging chamber 103 flows out from the gap 104. When the air in the converging chamber 103 flows to the gap 104, it passes through the upper end of the stator 5 and carries away the heat of the stator 5 and the rotor 6, realizing the second heat dissipation of the stator 5. This allows the heat of the key heat-generating components inside the traction machine 100 to be discharged from the first air outlet channel 105 and the first air outlet 107, further improving the heat dissipation efficiency of the traction machine 100.

[0063] To further improve the heat dissipation efficiency of the traction machine 100, preferably, the first support frame 21 also has a second air outlet 108 and a second air outlet channel 106. The second air outlet 108 is connected to the first end of the second air outlet channel 106, and the second end of the second air outlet channel 106 is connected to the gap 104. The second air outlet channel 106 intersects with the first air outlet channel 105, and the second air outlet channel 106 is offset from the first air inlet channel 102 or the second air inlet channel 202 in the radial direction of the traction shaft 3.

[0064] Specifically, after the heat dissipation channel 200 removes the heat from the bearing and motor assembly, part of it is discharged from the first air outlet channel 105 and the first air outlet 107, and the other part is discharged from the second air outlet channel 106 and the second air outlet 108. The second air outlet channel 106 intersects with the first air outlet channel 105. Therefore, the heat dissipation direction of the second air outlet channel 106 is different from that of the first air outlet channel 105, which is conducive to dispersing heat dissipation and further improving the heat dissipation efficiency of the traction machine 100.

[0065] Furthermore, the second air outlet duct 106 is radially offset from the first air inlet duct 102 or the second air inlet duct 202 on the traction shaft 3, such as... Figure 4 , Figure 6 As shown, the heat dissipation structure 110 is positioned close to the first air inlet 101 and the second air inlet 201, so that the heat dissipation structure 110 and the second air outlet 108 are radially offset from each other on the traction shaft 3. This prevents hot air from the second air outlet 108 from being drawn into the first air inlet 101 and the second air inlet 201 by the heat dissipation structure 110, and ensures that cold air enters the first heat dissipation air duct and the second heat dissipation air duct to dissipate heat from the motor assembly and bearings.

[0066] Preferably, the first support frame 21 has a first outer surface 211 and a second outer surface 212, which are located on two adjacent sides of the first support frame 21; the first air inlet 101, the second air inlet 201, and the second air outlet 108 are all located on the first outer surface 211; and the first air outlet 107 is located on the second outer surface 212.

[0067] Specifically, the first outer surface 211 and the second outer surface 212 are located on two adjacent sides of the first support frame 21, with the first air inlet 101, the second air inlet 201, the second air outlet 108, and the first air outlet 107 all located on the first support frame 21, ensuring that hot air flows and dissipates heat in a static structure. The first air inlet 101, the second air inlet 201, and the second air outlet 108 are all located on the first outer surface 211, while the first air outlet 107 is located on the second outer surface 212, thus offsetting the air inlet and outlet directions. This prevents hot air from repeatedly entering the heat dissipation channel 200. Furthermore, utilizing two different surfaces for heat dissipation also improves the heat dissipation efficiency of the traction machine 100.

[0068] To ensure the traction machine 100 meets structural strength requirements while improving its heat dissipation efficiency, preferably, the first air inlet channel 102, the second air inlet channel 202, the third air inlet channel 203, and the second air outlet channel 106 all extend along the axis of the traction shaft 3; the first air inlet channel 102 and the second air inlet channel 202 are arranged parallel to each other, and the second air inlet channel 202 and the second air outlet channel 106 are arranged parallel to each other; the first air outlet channel 105 extends radially along the traction shaft 3.

[0069] Specifically, the first air inlet channel 102, the second air inlet channel 202, the third air inlet channel 203, and the second air outlet channel 106 all extend along the axis of the traction shaft 3. This ensures that each air inlet channel faces the air intake direction of the heat dissipation structure 110, increasing the airflow speed within the traction machine 100 and improving the heat exchange frequency of the heat-generating components in the traction machine 100. Furthermore, the first air inlet channel 102, the second air inlet channel 202, and the second air outlet channel 106 are arranged parallel to each other, ensuring a regular pattern of openings within the first support frame 21 and preventing tilted openings from reducing its structural strength. Additionally, the first air outlet channel 105 extends radially along the traction shaft 3. The first air outlet channel 105 can be formed using the gap between the first support frame 21 and the traction sheave 4, avoiding the need to create the first air outlet channel 105 directly on the first support frame 21 and thus preventing a reduction in the structural strength of the first support frame 21.

[0070] Preferably, a through hole 511 is provided on the iron core 51 of the stator 5. The through hole 511 extends from one side of the iron core 51 to the other side, thereby forming a third air intake channel 203 in the iron core 51, ensuring that the heat generated by the stator 5 can be carried away by the air in the third air intake channel 203.

[0071] To simultaneously dissipate heat from both sets of motor assemblies of the traction machine 100, preferably, there are at least two heat dissipation structures 110, one of which is mounted on the first support frame 21 and the other on the second support frame 22; there are two heat dissipation channels 200, which are located on both sides of the traction sheave 4; one heat dissipation structure 110 corresponds to the first heat dissipation channel 211 and the other corresponds to the second heat dissipation channel 212; the air outlet directions of the two first heat dissipation structures are arranged opposite to each other.

[0072] Specifically, two heat dissipation channels 200 are respectively corresponding to two heat dissipation structures 110. One heat dissipation structure 110 accelerates the air flow in the first heat dissipation channel 211 to dissipate heat from the motor assembly on the first support frame 21; the other heat dissipation structure 110 accelerates the air flow in the second heat dissipation channel 212 to dissipate heat from the motor assembly on the second support frame 22, thus satisfying the simultaneous heat dissipation of the two sets of motor assemblies of the traction machine 100.

[0073] Preferably, a first ventilation slot 43 is provided inside the traction sheave 4, extending from one side of the traction sheave 4 to the other side. The two ends of the first ventilation slot 43 are connected to the first heat dissipation channel 211 and the second heat dissipation channel 212, respectively. Specifically, when both heat dissipation structures 110 are activated simultaneously, the air in the first heat dissipation channel 211 and the second heat dissipation channel 212 is in a convection state. Therefore, the air in the first heat dissipation channel 211 and the air in the second heat dissipation channel 212 are mutually repelled, and the air in the first heat dissipation channel 211 has difficulty entering the second heat dissipation channel 212 through the first ventilation slot 43. Each of the two heat dissipation channels 200 is responsible for the heat dissipation of its corresponding motor assembly.

[0074] Preferably, the outer wall of the traction sheave 4 is provided with a rope groove 41, which is used to wind the traction rope 44. When the traction sheave 4 rotates, it pulls the car through the traction rope 44 to realize the up and down movement of the car.

[0075] When one of the heat dissipation structures 110 fails, one of the heat dissipation channels 200 cannot effectively dissipate heat. However, there is no simultaneous air intake at both ends of the first ventilation slot 43, and the air in the first heat dissipation channel 211 and the air in the second heat dissipation channel 212 will not repel each other. Therefore, when only the first heat dissipation structure 110 is activated, the air in the first heat dissipation channel 211 can enter the second heat dissipation channel 212 through the first ventilation slot 43. After the first heat dissipation channel 211 dissipates heat from the first motor assembly, it can also dissipate heat from the second motor assembly. It can be seen that even if one of the heat dissipation structures 110 fails, it can still meet the heat dissipation needs of both sets of motor assemblies, improving the fault tolerance rate of the traction machine 100's heat dissipation.

[0076] Preferably, the heat dissipation channel 200 has four channels: the first heat dissipation channel 211 and the third heat dissipation channel 213 are disposed on the first side of the traction sheave 4 and are located at the upper and lower ends of the traction sheave 4, respectively; the second heat dissipation channel 212 and the fourth heat dissipation channel 214 are disposed on the second side of the traction sheave 4 and are located at the upper and lower ends of the traction sheave 4, respectively; there are two second ventilation slots 109 between the two bearing assemblies 23 and the two sides of the traction sheave 4, the first heat dissipation channel 211 is connected to the third heat dissipation channel 213 through one of the second ventilation slots 109, and the second heat dissipation channel 212 is connected to the fourth heat dissipation channel 214 through the other second ventilation slot 109.

[0077] Specifically, the first heat dissipation channel 211 and the third heat dissipation channel 213 can be located on one side of the traction sheave 4, and the second heat dissipation channel 212 and the fourth heat dissipation channel 214 can be located on the other side of the traction sheave 4, so as to dissipate heat from the two sets of motor assemblies and two bearings at the upper and lower ends of the traction sheave 4 and improve the heat dissipation coverage.

[0078] Furthermore, the first heat dissipation channel 211 is connected to the third heat dissipation channel 213 through one of the second ventilation slots 109, and the second heat dissipation channel 212 is connected to the fourth heat dissipation channel 214 through another second ventilation slot 109. The airflow of the first heat dissipation channel 211 can enter the third heat dissipation channel 213, and the airflow of the second heat dissipation channel 212 can enter the fourth heat dissipation channel 214. Therefore, the heat dissipation structure 110 can be installed at the first air inlet 101 near the first heat dissipation channel 211 or the third heat dissipation channel 213, or it can be installed at the first air inlet 101 near the second heat dissipation channel 212 or the fourth heat dissipation channel 214, making the installation of the heat dissipation structure 110 more flexible.

[0079] To achieve heat dissipation for the brake disc 42 and brake pads 71 ​​and improve the braking efficiency of the brake 7, preferably, the traction sheave 4 has a brake disc 42, and the first support frame 21 has a brake 7. The brake 7 includes two brake pads 71, the brake disc 42 is located between the two brake pads 71, and the two brake pads 71 ​​are used to abut against the brake disc 42; one of the brake pads 71 ​​forms a mating air gap with the brake disc 42, and the mating air gap is connected to the first air outlet channel 105.

[0080] Specifically, since the traction machine 100 uses a disc brake 7, with two brake pads 71 ​​located on both sides of the support disc 42, and the traction machine 100 is the power system of the elevator, the elevator frequently starts and stops, therefore, the brake 7 also needs to be frequently started and stopped. A fitting air gap is formed between the brake pads 71 ​​and the brake disc 42, and this air gap is connected to the first air outlet duct 105. When the air flows through the first air outlet duct 105, it can also carry away the heat from the brake disc 42 and the brake pads 71, preventing the high temperature of the brake pads 71 ​​and the brake disc 42 from affecting the braking stroke of the brake 7 and improving the braking efficiency of the brake 7.

[0081] The present invention also proposes a heat dissipation method for a traction machine 100 with a heat dissipation structure 110, comprising the following steps:

[0082] Step 1: After the stator 5 of the traction machine 100 is energized, the stator 5 cooperates with the rotor 6 and drives the traction wheel 4 to rotate.

[0083] Step 2: Activate the heat dissipation structure 110. The heat dissipation structure 110 accelerates the airflow near the traction machine 100, and the air accelerates into the first air inlet channel 102 through the first air inlet hole 101 and passes through the gap 104. The airflow carries away the heat of the bearing assembly 23, stator 5 and rotor 6, and the hot air flows out from the first air outlet channel 105.

[0084] Specifically, since the positions of the first air inlet channel 102 and the gap 104 are fixed, the heat dissipation structure 110 can be activated only when the traction machine 100 is in operation, which can meet the heat dissipation needs of the motor assembly and bearing assembly 23 inside the traction machine 100. The operation is simple; during maintenance, only the heat dissipation structure 110 needs to be inspected.

[0085] When referencing drawings, new features are explained. To avoid redundant references to drawings that would make the description less concise, features already described will not be referenced again on the drawings if the description is clear.

[0086] The purpose of the above embodiments is to reproduce and derive the technical solution of the present invention by way of example, and to fully describe the technical solution, purpose and effect of the present invention. The purpose is to enable the public to have a more thorough and comprehensive understanding of the disclosure of the present invention, and not to limit the scope of protection of the present invention.

[0087] The above embodiments are not an exhaustive list based on the present invention, and there may be many other embodiments not listed. Any substitutions and improvements made without departing from the concept of the present invention are within the protection scope of the present invention.

Claims

1. A traction machine with a heat dissipation structure, characterized in that, The traction machine includes a first support frame, a second support frame, a traction shaft, and a traction wheel. The traction wheel is sleeved on the outside of the traction shaft. Both ends of the traction shaft are respectively installed on the first support frame and the second support frame. Bearing assemblies are provided between the traction shaft and the first support frame and the second support frame. The traction shaft rotates with the first support frame and the second support frame through two bearing assemblies. The first support frame has a stator, the traction sheave has a rotor that cooperates with the stator, and there is a gap between the stator and the rotor; the first support frame is provided with a first air inlet hole and a first air inlet channel, the first air inlet channel is located between the bearing assembly and the stator, and there is a first air outlet channel and a first air outlet hole between the traction sheave and the first support frame; The first air inlet, the first air inlet channel, the gap, the first air outlet channel, and the first air outlet are connected in sequence to form a heat dissipation channel, and the heat dissipation channel is arranged around the stator; the heat dissipation structure is installed on the first support frame and is arranged close to the first air inlet, and the air outlet direction of the heat dissipation structure is towards the first air inlet; The first support frame is also provided with a second air inlet and a second air inlet channel, and the stator is provided with a third air inlet channel. The second air inlet, the second air inlet channel, and the third air inlet channel are connected in sequence, and the air outlet surface of the heat dissipation structure covers the first air inlet and the second air inlet. The first air inlet channel is located close to the bearing assembly, and the second and third air inlet channels are on the same straight line. There is a converging chamber between the stator and the traction sheave. The first air inlet channel and the third air inlet channel are both connected to the first end of the converging chamber, and the second end of the converging chamber is connected to the gap. The first support frame also has a second air outlet and a second air outlet channel. The second air outlet is connected to the first end of the second air outlet channel, and the second end of the second air outlet channel is connected to the gap. The second air outlet channel intersects with the first air outlet channel; The second air outlet channel is offset from the first air inlet channel or the second air inlet channel in the radial direction of the traction shaft; The first support frame has a first outer surface and a second outer surface, which are located on two adjacent sides of the first support frame; the first air inlet, the second air inlet, and the second air outlet are all located on the first outer surface; The first air outlet is located on the second outer surface.

2. The traction machine with a heat dissipation structure as described in claim 1, characterized in that, The first air inlet channel, the second air inlet channel, the third air inlet channel, and the second air outlet channel all extend along the axis of the traction shaft. The first air inlet channel and the second air inlet channel are arranged in parallel, and the second air inlet channel and the second air outlet channel are arranged in parallel; The first air outlet duct extends radially along the traction shaft.

3. The traction machine with a heat dissipation structure as described in claim 1 or 2, characterized in that, The heat dissipation structure has at least two, one of which is mounted on the first support frame and the other is mounted on the second support frame. The heat dissipation channel has two channels, which are located on both sides of the traction sheave respectively; one of the heat dissipation structures corresponds to the first heat dissipation channel, and the other heat dissipation structure corresponds to the second heat dissipation channel. The air outlet directions of the two heat dissipation structures are arranged opposite to each other.

4. The traction machine with a heat dissipation structure as described in claim 3, characterized in that, The traction sheave has a first ventilation slot that extends from one side of the traction sheave to the other side. The two ends of the first ventilation slot are connected to a first heat dissipation channel and a second heat dissipation channel, respectively.

5. The traction machine with a heat dissipation structure as described in claim 3, characterized in that, The heat dissipation channel has four channels. The first and third heat dissipation channels are located on the first side of the traction sheave, at the upper and lower ends of the traction sheave, respectively. The second and fourth heat dissipation channels are located on the second side of the traction sheave, at the upper and lower ends of the traction sheave, respectively. The two bearing assemblies are provided with two second ventilation slots between the two sides of the traction sheave. The first heat dissipation channel is connected to the third heat dissipation channel through one of the second ventilation slots, and the second heat dissipation channel is connected to the fourth heat dissipation channel through the other second ventilation slot.

6. The traction machine with a heat dissipation structure as described in claim 1 or 2, characterized in that, The traction sheave has a brake disc, and the first support frame has a brake. The brake includes two brake pads, the brake disc is located between the two brake pads, and the two brake pads are used to abut against the brake disc. One of the brake pads forms a fitting air gap with the brake disc, and the fitting air gap is connected to the first air outlet channel.

7. A heat dissipation method for a traction machine with a heat dissipation structure as described in claim 1, characterized in that, Includes the following steps: When the stator of the traction machine is energized, the stator engages with the rotor and drives the traction wheel to rotate; The heat dissipation structure is activated, which accelerates the airflow near the traction machine. The air is accelerated into the first air inlet channel through the first air inlet hole and passes through the gap. The airflow carries away the heat from the bearing assembly, stator, and rotor, and the hot air flows out from the first air outlet channel.

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