Permanent magnet synchronous traction machine for elevator

Abstract

This invention discloses a permanent magnet synchronous traction machine for elevators. Both the traction sheave and brake sheave are connected to the main shaft, and the traction sheave, brake sheave, and main shaft rotate synchronously. This allows for stable torque transmission between the brake sheave and traction sheave via the main shaft, enabling stable start-stop operation of the traction sheave. Because an oil-separating groove is provided on the bottom side of the brake sheave facing the receiving groove, and this groove is circumferentially arranged around the main shaft, it is positioned between the main shaft and the brake surface, effectively preventing the flow of oil between them. When the sealing structure of the permanent magnet synchronous traction machine fails and oil leakage occurs, the oil will flow along the main shaft and the inner surface of the brake sheave into the oil-separating groove. The oil-separating groove retains the oil, preventing it from continuing to flow along the inner surface of the brake sheave. This effectively prevents oil from flowing onto the brake surface in the event of leakage, greatly ensuring stable output of braking torque.

Description

Technical Field

[0001] This invention relates to the field of traction machine technology, and in particular to a permanent magnet synchronous traction machine for elevators. Background Technology

[0002] Permanent magnet synchronous traction machines, also known as gearless transmissions, are installed in elevator machine rooms or elevator shafts, typically on the top floor of a building or inside the shaft, and serve as the elevator's power unit. Permanent magnet synchronous traction machines directly drive the sheaves from the main unit, eliminating the need for a gearbox. With the rapid development of the elevator market, the application of permanent magnet synchronous traction machines is increasing, accounting for over 70% of all elevator traction machines.

[0003] Currently, most traction machines in the industry have shortcomings in their oil leakage prevention design and structural matching, making the main shaft prone to oil leakage during long-term operation. As the main shaft and brake wheel rotate, leaked oil will flow along the surface of the brake wheel, making it difficult to keep the brake surface of the traction machine clean. However, once the brake surface is contaminated with oil, it will lead to insufficient braking torque, posing a serious safety hazard to the operation of the traction machine. Summary of the Invention

[0004] Therefore, it is necessary to provide a permanent magnet synchronous traction machine for elevators to prevent oil from entering the braking surface and ensure stable output of braking torque.

[0005] The technical solution is as follows:

[0006] A permanent magnet synchronous traction machine for elevators includes: a base with a receiving groove; a brake wheel and a main shaft, wherein the brake wheel is rotatably mounted on the base via the main shaft, the brake wheel is located within the receiving groove, the brake wheel has an oil-separating groove on the side facing the bottom wall of the receiving groove, the oil-separating groove is arranged circumferentially around the main shaft, and the brake wheel has a braking surface on the side facing the side wall of the receiving groove; and a traction sheave connected to the main shaft.

[0007] The aforementioned permanent magnet synchronous traction machine for elevators connects both the traction sheave and the brake sheave to the main shaft, and synchronizes the rotation of the traction sheave, brake sheave, and main shaft. This allows for stable torque transmission between the brake sheave and traction sheave via the main shaft, enabling stable start-stop operation of the traction sheave. Because an oil separator groove is located on the side of the brake sheave facing the bottom of the receiving groove, and this groove is circumferentially arranged around the main shaft, it effectively isolates the flow of oil between the main shaft and the brake surface. When the sealing structure of the permanent magnet synchronous traction machine for elevators fails and oil leakage occurs, the oil will flow along the main shaft and the inner surface of the brake wheel into the oil separator. Under the retention effect of the oil separator, it loses the power to continue flowing along the inner surface of the brake wheel. This effectively prevents oil from flowing through the air gap between the stator and rotor in the event of an oil leak, avoiding contamination of other components inside the elevator's permanent magnet synchronous traction machine and ensuring its normal operation and lifespan. Simultaneously, it prevents oil from flowing onto the brake surface, greatly ensuring stable output of braking torque. Because the brake wheel is located within the receiving groove, and the brake surface on the brake wheel faces the side wall of the receiving groove, the brake surface is covered by the machine base, further improving its protective performance and making it even more difficult for oil from the wire rope to flow or be splashed onto the brake surface.

[0008] The principles and effects of the present invention will be further explained below in conjunction with the above-described solution:

[0009] In one embodiment, a support member is provided on the bottom wall of the receiving groove. The support member is arranged circumferentially around the main shaft. The support member is located between the braking surface and the main shaft, and the side of the support member facing the main shaft is used to receive oil stains falling from the oil separator groove.

[0010] In one embodiment, the support member is provided with an oil-blocking protrusion, which is arranged circumferentially along the main shaft. The oil-blocking protrusion, the support member, and the bottom wall of the machine base form an oil collection groove, and the opening of the oil collection groove is opposite to the opening of the oil separation groove.

[0011] In one embodiment, the base is provided with an oil drain hole, which is connected to the oil collection tank.

[0012] In one embodiment, the brake wheel and the main shaft are integrally formed, and a first bushing is provided on the base. The brake wheel is rotatably mounted in the first bushing via the main shaft.

[0013] In one embodiment, the permanent magnet synchronous traction machine for elevators further includes a first cover and a bearing. The main shaft is mounted in the first bushing via the bearing. The first cover is sleeved on the main shaft and is sealed on the end of the first bushing near the brake wheel.

[0014] In one embodiment, the permanent magnet synchronous traction machine for elevators further includes a first seal disposed between the first cover and the main shaft.

[0015] In one embodiment, the brake wheel includes a brake wheel body and a connecting portion. The brake wheel body is connected to the main shaft through the connecting portion. The oil separator groove is disposed on the connecting portion, and the brake surface is disposed on the brake wheel body.

[0016] In one embodiment, the connecting portion is inclined relative to the horizontal direction on the main shaft, and the end of the connecting portion near the brake wheel body is disposed away from the base relative to the end of the connecting portion near the main shaft.

[0017] In one embodiment, the traction sheave and the brake sheave are located on opposite sides of the machine base, and the traction sheave is provided with a second bushing, which is sleeved on the main shaft and rotates synchronously with the main shaft. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the permanent magnet synchronous traction machine for elevators according to an embodiment of the present invention;

[0019] Figure 2 This is a cross-sectional view of the permanent magnet synchronous traction machine for elevators according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100. Permanent magnet synchronous traction machine for elevators; 110. Machine base; 111. First bushing; 112. Receiving groove; 1121. Side wall of the receiving groove; 1122. Bottom wall of the receiving groove; 113. Support component; 1131. Oil baffle protrusion; 1132. Oil collection groove; 114. Motor junction box; 115. Brake junction box; 116. Rope guide component; 117. Brake; 118. Oil drain hole; 120. Traction... 121. Second shaft sleeve, 122. Second cover, 123. Second seal, 130. Brake wheel, 131. Brake surface, 132. Brake wheel body, 133. Connecting part, 134. First cover, 135. First seal, 136. Oil separator groove, 140. Main shaft, 141. Limiting protrusion, 150. Bearing, 160. Winding coil, 170. Encoder, 180. Turning gear. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of protection of this invention.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] In this invention, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0026] In one embodiment, please refer to Figure 1 and Figure 2 A permanent magnet synchronous traction machine 100 for elevators includes: a base 110, a brake wheel 130, a main shaft 140, and a traction sheave 120. The base 110 has a receiving groove 112. The brake wheel 130 is rotatably mounted on the base 110 via the main shaft 140 and is located within the receiving groove 112. An oil-separating groove 136 is provided on the side of the brake wheel 130 facing the bottom wall 1122 of the receiving groove. The oil-separating groove 136 is arranged circumferentially around the main shaft 140. A braking surface 131 is provided on the side of the brake wheel 130 facing the side wall 1121 of the receiving groove. The traction sheave 120 is connected to the main shaft 140.

[0027] The aforementioned permanent magnet synchronous traction machine 100 for elevators connects both the traction sheave 120 and the brake sheave 130 to the main shaft 140, and synchronizes the rotation of the traction sheave 120, brake sheave 130, and main shaft 140. Thus, through the main shaft 140, a stable torque transmission is achieved between the brake sheave 130 and the traction sheave 120, enabling stable start-stop operation of the traction sheave 120. Since the brake sheave 130 has an oil-separating groove 136 on the side facing the bottom of the receiving groove 112, and the oil-separating groove 136 is arranged circumferentially around the main shaft 140, the oil-separating groove 136 is located between the main shaft 140 and the brake surface 131, effectively preventing the flow of oil between the main shaft 140 and the brake surface 131. When the sealing structure on the permanent magnet synchronous traction machine 100 of the elevator fails and oil leakage occurs, the oil will flow along the inner surface of the main shaft 140 and the brake wheel 130 into the oil separator 136. Under the retention effect of the oil separator 136, the oil loses the power to continue flowing along the inner surface of the brake wheel 130. In this way, it effectively prevents the oil from flowing along the inner surface of the brake wheel 130 through the air gap between the stator and rotor in the event of an oil leak, avoiding contamination of other components inside the permanent magnet synchronous traction machine 100 of the elevator, ensuring the normal operation and lifespan of the permanent magnet synchronous traction machine 100 of the elevator; at the same time, it prevents the oil from flowing onto the brake surface 131, greatly ensuring the stable output of the braking torque. Since the brake wheel 130 is located inside the receiving groove 112 and the brake surface 131 on the brake wheel 130 is set towards the side wall 1121 of the receiving groove, the brake surface 131 is covered by the base 110, which further improves the protective performance of the brake surface 131 and makes it even more impossible for oil stains on the wire rope to flow or be thrown onto the brake surface 131.

[0028] It should be noted that the side wall 1121 and bottom wall of the receiving groove should be understood as follows: the bottom wall 1122 of the receiving groove is the part on the side facing the opening end of the receiving groove 112; the side wall 1121 of the receiving groove is the part between the bottom wall 1122 of the receiving groove and the opening end of the receiving groove 112.

[0029] Further, please refer to Figure 2A support member 113 is provided on the bottom wall 1122 of the receiving tank. The support member 113 is arranged circumferentially around the main shaft 140. The support member 113 is located between the braking surface 131 and the main shaft 140, and the side of the support member 113 facing the main shaft 140 is used to receive oil stains falling from the oil separator 136. It can be seen that when too much oil stains accumulate in the oil separator 136, the oil stains will fall onto the side of the support member 113 under their own gravity. Thus, the support member 113 on the bottom wall 1122 of the receiving tank effectively achieves stable collection of oil stains, preventing oil stains in the oil separator 136 from dripping directly onto other equipment in the machine base 110, and greatly improving the cleanliness of the inside of the elevator permanent magnet synchronous traction machine 100. Meanwhile, since the support member 113 is located between the braking surface 131 and the main shaft 140, the support member 113 in this embodiment acts as a protective layer for the braking surface 131, effectively preventing oil stains from being thrown onto the braking surface 131 under high-speed rotation, thereby effectively preventing oil stains from entering the braking surface 131.

[0030] Further, please refer to Figure 2 The support member 113 is provided with an oil-blocking protrusion 1131. The oil-blocking protrusion 1131 is arranged circumferentially along the main shaft 140. The oil-blocking protrusion 1131, the support member 113, and the bottom wall of the base 110 form an oil collection groove 1132. The opening of the oil collection groove 1132 is opposite to the opening of the oil separator groove 136. In this way, the oil-blocking protrusion 1131 forms an oil collection groove 1132 on the support member 113, increasing the amount of oil collected on the support member 113 and preventing oil stains from flowing out from the edge of the support member 113, thus avoiding secondary pollution to the permanent magnet synchronous traction machine 100 for elevators. At the same time, the oil-blocking protrusion 1131 effectively shortens the gap between the support member 113 and the brake wheel 130, reducing the probability of oil stains being thrown onto the brake wheel 130 due to high-speed rotation, and greatly improving the protective effect of the brake surface 131.

[0031] Specifically, the oil-blocking protrusion 1131 is disposed at the edge of the support member 113, increasing the effective oil-falling area on the support member 113 and greatly improving the oil collection effect of the support member 113. Meanwhile, the oil-blocking protrusion 1131 and the support member 113 are an integral structure. Of course, in other embodiments, the oil-blocking protrusion 1131 and the support member 113 can also be a component assembly structure.

[0032] In another embodiment, the oil collection groove 1132 can be directly grooved on the side of the support member 113. At the same time, the side of the support member 113 facing the spindle 140 is inclined relative to the horizontal direction, and the end of the support member 113 away from the base 110 is higher than the end of the support member 113 near the base 110. Thus, the side of the support member 113 has a certain slope on the bottom wall 1122 of the receiving groove, which facilitates the concentration of oil on the support member 113 at the base 110.

[0033] Furthermore, please refer to Figure 2 The base 110 is provided with an oil drain hole 118. The oil drain hole 118 is connected to the oil collection tank 1132. Therefore, oil that falls into the oil collection tank 1132 can be discharged from the base 110 through the oil drain hole 118, completely preventing oil from entering the brake surface 131 and further ensuring the cleanliness of the brake surface 131. Specifically, in this embodiment, the oil drain hole 118 is located at the lowest position of the support member 113. It should be noted that the lowest position of the support member 113 here should be understood as: during normal operation of the elevator permanent magnet synchronous traction machine 100, the part of the side of the support member 113 most prone to oil accumulation should be understood as the lowest position of the support member 113. For specific structure, please refer to... Figure 2 .

[0034] In one embodiment, please refer to Figure 2 The brake wheel 130 and the main shaft 140 are integrated into one structure. A first bushing 111 is provided on the base 110. The brake wheel 130 is rotatably mounted in the first bushing 111 via the main shaft 140. Therefore, the integrated design of the brake wheel 130 and the main shaft 140 simplifies the assembly process of the permanent magnet synchronous traction machine 100 for elevators and helps improve the coaxiality accuracy of the brake surface 131 and the main shaft 140. At the same time, the first bushing 111 on the base 110 makes the installation of the main shaft 140 simple and convenient, thereby improving the assembly efficiency of the permanent magnet synchronous traction machine 100 for elevators.

[0035] It should be noted that the integrated structure of brake wheel 130 and main shaft 140 should be understood as the brake wheel 130 and main shaft 140 being manufactured using an integrated molding process, such as casting, die casting, extrusion, etc.

[0036] Further, please refer to Figure 2 The elevator permanent magnet synchronous traction machine 100 also includes a first cover 134 and a bearing 150. The main shaft 140 is mounted inside the first bushing 111 via the bearing 150. The first cover 134 is sleeved on the main shaft 140 and seals the first bushing 111 at the end near the brake wheel 130. Thus, the bearing 150 allows the main shaft 140 to rotate more smoothly within the first bushing 111, thereby improving the transmission between the brake wheel 130, the main shaft 140, and the traction sheave 120, effectively reducing torque attenuation on the main shaft 140. Simultaneously, the first cover 134 effectively limits the bearing 150, ensuring it can only rotate and not move axially, greatly improving the stability of the main shaft 140 on the machine base 110. The first cover 134 is connected to the first bushing 111 by bolts or screws.

[0037] Furthermore, the bearing 150 adopts a single bearing structure, which has the characteristics of small axial dimension, enabling the elevator permanent magnet synchronous traction machine 100 to achieve the effects of compact overall structure, convenient disassembly and assembly, and easy layout of oil circuits in the structure.

[0038] Specifically, the bearing 150 is a double-row radial bearing 150, which has a large load-bearing capacity, thus effectively extending the service life of the elevator permanent magnet synchronous traction machine 100.

[0039] Furthermore, please refer to Figure 2 The elevator permanent magnet synchronous traction machine 100 also includes a first seal 135, which is disposed between the first cover 134 and the main shaft 140. Thus, the first seal 135, disposed between the first cover 134 and the main shaft 140, fills the gap between them, improving the sealing performance and further preventing lubricating oil from flowing along the inner surface of the brake wheel 130 into the air gap between the stator and rotor, thereby affecting the performance of the elevator permanent magnet synchronous traction machine 100. The first seal 135 can be a felt, a rotary lip seal, an O-ring, or other sealing device.

[0040] In one embodiment, please refer to Figure 2 The spindle 140 is provided with a limiting protrusion 141, which is matched with the bearing 150. In this way, the spindle 140 can only rotate and cannot move along the axial direction, which greatly improves the stability of the spindle 140 on the machine base 110.

[0041] In one embodiment, please refer to Figure 2 The elevator permanent magnet synchronous traction machine 100 also includes a second cover 122. The first cover 134 and the second cover 122 are respectively sealed on the opposite ends of the first bushing 111. The second cover 122 is sleeved on the main shaft 140, and the bearing 150 is confined between the first cover 134 and the second cover 122. In this way, the cooperation of the first cover 134 and the second cover 122 effectively seals both ends of the first bushing 111, effectively preventing the lubricating oil on the main shaft 140 from flowing out. This ensures that the traction sheave 120 is clean and tidy during operation. At the same time, the first cover 134 and the second cover 122 confine the bearing 150, making the bearing 150 stable within the first bearing 150 and preventing the main shaft 140 from easily becoming unbalanced during rotation due to the lateral movement of the bearing 150.

[0042] Further, please refer to Figure 2A second sealing element 123 is provided between the second cover 122 and the first bushing 111. The second sealing element 123 enhances the sealing effect between the second cover 122 and the first bushing 111, significantly reducing the risk of oil leakage in the elevator permanent magnet synchronous traction machine 100, making the elevator permanent magnet synchronous traction machine 100 safer, more reliable, and more stable in operation. The second sealing element 123 can be a felt, a rotary lip seal, an O-ring, or other sealing device. Specifically, in this embodiment, the second cover 122 is connected to the first bushing 111 by bolts or screws.

[0043] In one embodiment, please refer to Figure 2 The brake wheel 130 includes a brake wheel body 132 and a connecting portion 133. The brake wheel body 132 is connected to the main shaft 140 via the connecting portion 133. An oil separator groove 136 is provided on the connecting portion 133. A braking surface 131 is provided on the brake wheel body 132. In this way, the oil separator groove 136 and the braking surface 131 are respectively distributed on two parts of the brake wheel 130, so that the two features of the oil separator groove 136 and the braking surface 131 are set as far apart as possible, avoiding oil from the oil separator groove 136 splashing onto the braking surface 131.

[0044] For details, please refer to Figure 2 The brake wheel body 132, connecting part 133, and main shaft 140 are integrated into a single structure. This not only simplifies the assembly process of the brake wheel 130 and main shaft 140, but also improves the strength of the brake wheel 130 and main shaft 140 as a whole structure, greatly enhancing the structural strength of the elevator permanent magnet synchronous traction machine 100 and ensuring its stable operation.

[0045] Further, please refer to Figure 2 The connecting part 133 is inclined relative to the horizontal direction on the main shaft 140, and the end of the connecting part 133 near the brake wheel body 132 is positioned away from the base 110 relative to the end of the connecting part 133 near the main shaft 140. Therefore, in this embodiment, the connecting part 133 forms a certain slope in front of the main shaft 140, which is beneficial to improving the filling capacity of the molten metal, reasonably controlling solidification shrinkage, reducing casting internal stress, and reducing casting defects such as incomplete filling, shrinkage cavities, and cracks. At the same time, the connecting part 133 on the brake wheel 130 is inclined towards the main shaft 140, reducing the gap between the connecting part 133 and the support member 113. This not only helps to reduce the overall size of the elevator permanent magnet synchronous traction machine 100, but also makes the overall structure of the elevator permanent magnet synchronous traction machine 100 more compact.

[0046] In one embodiment, please refer to Figure 2The traction sheave 120 and brake wheel 130 are located on opposite sides of the base 110, and a second bushing 121 is provided on the traction sheave 120. The second bushing 121 is fitted onto the main shaft 140 and is synchronously connected to the main shaft 140. Therefore, since the traction sheave 120 and brake wheel 130 are located on opposite sides of the base 110, they are completely separated by the base 110. This effectively prevents oil stains on the wire rope from easily flowing or being splashed onto the brake surface 131 due to the brake wheel 130's proximity to the traction sheave 120, thus ensuring the cleanliness of the brake surface 131. Simultaneously, the second bushing 121 on the traction sheave 120 facilitates the assembly operation of the traction sheave 120 and the main shaft 140.

[0047] Optionally, the second bushing 121 and the main shaft 140 can be connected by key connection, expansion connection, end cover connection, snap-fit ​​or other connection methods to rotate synchronously.

[0048] Specifically, when all second bushings 121 are connected to the main spindle 140 via key connections, the main spindle 140 is provided with a key, and each second bushing 121 is provided with a keyway; when all second bushings 121 are connected to the main spindle 140 via expansion sleeves, the expansion sleeves are fitted onto the main spindle 140, and the second bushings 121 are fitted onto the expansion sleeves; when all second bushings 121 are connected to the main spindle 140 via end caps, the end caps are respectively connected to the second bushings 121 and the main spindle 140 via bolts or screws.

[0049] In one embodiment, please refer to Figure 2 The permanent magnet synchronous traction machine 100 for elevators also includes a winding coil 160. The winding coil 160 is located in the receiving groove 112 and is sleeved inside the brake wheel 130. Therefore, in this embodiment, the winding coil 160 and the brake wheel 130 constitute a motor. The winding coil 160 drives the brake wheel 130 to rotate; the rotated brake wheel 130 drives the traction wheel 120 to rotate synchronously via the main shaft 140, causing the wire rope on the traction wheel 120 to be wound or unwound, thereby realizing the operation of the elevator. Since the winding coil 160 is sleeved inside the brake wheel 130, the motor constituted in this embodiment is an external rotor motor, that is, the brake wheel 130 is outside the winding coil 160, which can achieve low speed and high torque output. Specifically, in this embodiment, a motor junction box 114 is provided on the base 110, and the motor junction box 114 is electrically connected to the winding coil 160.

[0050] Further, please refer to Figure 2 The winding coil 160 is sleeved on the support member 113. In this way, the support member 113 makes the winding coil 160 stably installed on the base 110, thereby making the permanent magnet synchronous traction machine 100 for elevators operate more stably.

[0051] In one embodiment, please refer to Figure 1 The elevator permanent magnet synchronous traction machine 100 also includes a brake 117. The brake 117 is mounted on the base 110, making the main unit structure simple, compact, and lightweight. Furthermore, the plate brake 117 outputs a large braking torque, ensuring reliable and stable braking of the traction machine. Specifically, in this embodiment, the base 110 also includes a brake junction box 115, which is electrically connected to the brake 117.

[0052] In one embodiment, please refer to Figure 1 The permanent magnet synchronous traction machine 100 for elevators also includes an encoder 170, which is used to provide feedback on the running speed and rotor position information of the motor.

[0053] In one embodiment, please refer to Figure 1 The elevator permanent magnet synchronous traction machine 100 also includes a rope-blocking component 116. The rope-blocking component 116 is mounted on the base 110 and engages with the wire rope on the traction sheave 120 for limiting its movement. Thus, when the wire rope is being wound or unwound, the rope-blocking component 116 engages with the wire rope, ensuring that one end of the wire rope is tightly pressed against the traction sheave 120, effectively preventing the wire rope from jumping off, thereby ensuring the stable operation of the elevator permanent magnet synchronous traction machine 100 and the elevator itself.

[0054] In one embodiment, please refer to Figure 1 The traction sheave 120 is equipped with a turning gear 180, so that when the elevator loses power or malfunctions during operation, the turning gear 180 makes the movement of the car easier.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A permanent magnet synchronous traction machine for elevators, characterized in that, include: The machine base is provided with a receiving groove; A brake wheel and a main shaft are provided. The brake wheel is rotatably mounted on the machine base via the main shaft. The brake wheel is located within the receiving groove. An oil-separating groove is provided on the side of the brake wheel facing the bottom wall of the receiving groove. The oil-separating groove is arranged circumferentially around the main shaft. A braking surface is provided on the side of the brake wheel facing the side wall of the receiving groove. The traction sheave is connected to the main shaft, and the traction sheave and the brake wheel are located on opposite sides of the machine base. The brake wheel and the main shaft are an integral structure. The base is provided with a first bushing, and the brake wheel is rotatably mounted in the first bushing through the main shaft. It also includes a bearing, the main shaft is mounted in the first bushing through the bearing, and the main shaft is provided with a limiting protrusion, which is matched with the bearing for limiting. A support member is provided on the bottom wall of the receiving groove. The support member is arranged around the circumference of the main shaft. The support member is located between the braking surface and the main shaft, and the side of the support member facing the main shaft is used to receive oil stains falling from the oil separator.

2. The permanent magnet synchronous traction machine for elevators according to claim 1, characterized in that, The support member is provided with an oil-blocking protrusion, which is arranged along the circumference of the main shaft. The oil-blocking protrusion, the support member, and the bottom wall of the machine base form an oil collection groove, and the opening of the oil collection groove is opposite to the opening of the oil separation groove.

3. The permanent magnet synchronous traction machine for elevators according to claim 2, characterized in that, The base is provided with an oil drain hole, which is connected to the oil collection tank.

4. The permanent magnet synchronous traction machine for elevators according to claim 1, characterized in that, It also includes a first cover, which is sleeved on the main shaft and sealed on the end of the first bushing near the brake wheel.

5. The permanent magnet synchronous traction machine for elevators according to claim 4, characterized in that, It also includes a first seal, which is disposed between the first cover and the main shaft.

6. The permanent magnet synchronous traction machine for elevators according to any one of claims 1-5, characterized in that, The brake wheel includes a brake wheel body and a connecting part. The brake wheel body is connected to the main shaft through the connecting part. The oil separator groove is disposed on the connecting part, and the brake surface is disposed on the brake wheel body.

7. The permanent magnet synchronous traction machine for elevators according to claim 6, characterized in that, The connecting part is inclined relative to the horizontal direction on the main shaft, and the end of the connecting part near the brake wheel body is located away from the machine base relative to the end of the connecting part near the main shaft.

8. The permanent magnet synchronous traction machine for elevators according to any one of claims 1-5, characterized in that, The traction sheave is provided with a second bushing, which is sleeved on the main shaft and rotates synchronously with the main shaft.

Images