Permanent magnet synchronous motor traction machine

Abstract

The utility model provides a permanent magnet synchronous motor traction machine, which relates to the technical field of traction machines and comprises a transmission box body, a motor is fixedly erected on one side of the transmission box body, and a traction wheel is rotatably arranged on the side wall, far away from the motor, of the transmission box body. The rotating speed of the traction wheel can be adjusted to adapt to different conditions in practical application, the torque of the traction wheel is increased through the designed differential unit, the braking unit plays an emergency locking braking role on the motor, the speed changing unit, the braking unit and the motor are adjusted and controlled through the control unit, the operation efficiency of elevator equipment is improved, and the safety of the elevator equipment is improved. The energy consumption is reduced, and the overall performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of traction machines, in particular to a permanent magnet synchronous motor traction machine. Background Art

[0002] With the development of economy and society, the development of various electrical appliances needs to pay more attention to sustainable development and the improvement of market competitiveness, and more and more attention is paid to environmental protection. The permanent magnet synchronous traction machine, as the driving device of people's elevators, is no exception. The permanent magnet synchronous traction machine is commonly known as a non-reduction box transmission. It is installed in the elevator machine room or the elevator shaft, generally above the top floor of the building or inside the shaft. It is the power device of the elevator. Generally, the permanent magnet synchronous traction machine mainly consists of a permanent magnet synchronous motor, a traction wheel and a braking system. High-performance permanent magnet materials and special motor structures are adopted. The braking system of the traction machine consists of a brake, a brake wheel, a brake arm and brake shoes, etc. The traction wheel and the brake are supported by two points.

[0003] The existing permanent magnet synchronous traction machine is not easy to realize the speed regulation function, cannot meet the occasions with high power and high requirements for speed regulation, and is not easy to adjust the output torque and speed of the motor, and cannot meet the needs of the elevator in different operating stages. Content of the Utility Model

[0004] The purpose of the utility model is to provide a permanent magnet synchronous motor traction machine to alleviate the technical problems in the prior art that the equipment is not easy to realize the speed regulation function, not easy to adjust the output torque and speed of the motor, and cannot meet the needs of the elevator in different operating stages.

[0005] A permanent magnet synchronous motor traction machine provided by the utility model includes:

[0006] A transmission box body, on one side of which a motor is fixedly installed, and a traction wheel is rotatably arranged on the side wall of the transmission box body far away from the motor;

[0007] It further includes:

[0008] A speed change unit for adjusting the output torque and speed of the traction wheel, and the speed change unit is located inside the transmission box body;

[0009] A differential unit for increasing the torque when the traction wheel works, and the motor drives the traction wheel to operate through the speed change unit and the differential unit;

[0010] A braking unit for urgently locking the rotor shaft of the motor;

[0011] A control unit for regulating the transmission state of the motor, the transmission ratio of the speed change unit, and the opening and closing state of the braking unit.

[0012] In an alternative embodiment,

[0013] The speed change unit includes an input shaft and a second output shaft rotatably assembled inside the transmission housing. The output end of the motor is fixedly provided with a first output shaft, and the first output shaft is rotatably inserted into the interior of the transmission housing. The input shaft and the first output shaft are coaxial, the second output shaft is parallel to the input shaft, and the outer surfaces of the input shaft and the second output shaft are respectively assembled with a driving wheel and a driven wheel, and a conveyor belt is drivingly assembled between the driving wheel and the driven wheel;

[0014] The driving wheel and the driven wheel respectively include two separated driving wheel discs and two separated driven wheel discs. The facing surfaces of the two driving wheel discs and the two driven wheel discs are inclined conical surfaces, and the driving wheel and the driven wheel form the outer wall of a V-shaped groove. The conveyor belt is embedded between the two V-shaped grooves. One of the driving wheel discs and one of the driven wheel discs are respectively fixedly sleeved on the outer surfaces of the input shaft and the second output shaft, and the other driving wheel disc and the other driven wheel disc are respectively axially slidably sleeved on the outer surfaces of the input shaft and the second output shaft, and the axially slidable driving wheel disc and driven wheel disc are staggeredly distributed. A pushing component for adjusting the distance between the two driving wheel discs and the two driven wheel discs is further provided inside the transmission housing.

[0015] In an alternative embodiment,

[0016] The pushing component includes a hydraulic push rod fixedly provided inside the transmission housing. The cylinder part of the hydraulic push rod is fixedly assembled with the transmission housing, and the output end of the hydraulic push rod is fixedly installed with the axially slidable driving wheel disc and the driven wheel disc. An oil pump for driving the hydraulic push rod is further provided inside the transmission housing.

[0017] In an alternative embodiment,

[0018] A torque converter is provided between the first output shaft and the input shaft, and the torque converter is used to transmit the power and torque of the first output shaft to the input shaft.

[0019] In an alternative embodiment,

[0020] The differential unit includes a planetary gear unit fixedly assembled between the traction wheel and the second output shaft. The output end of the planetary gear unit rotatably penetrates the transmission housing, and the traction wheel is fixedly sleeved on the outer surface of the output end of the planetary gear unit. The input end of the planetary gear unit is connected to the second output shaft through a coupling.

[0021] In an alternative embodiment,

[0022] The control unit includes a control cabinet fixed to the transmission housing, and a microcomputer installed inside the control cabinet.

[0023] In an alternative embodiment,

[0024] The braking unit includes a brake fixedly arranged at one end of the motor away from the transmission housing, and the brake has two states of locking and non-locking the rotor shaft of the motor.

[0025] In an alternative embodiment,

[0026] Lubricant is applied to the rotating parts of the input shaft, the second output shaft and the transmission housing, as well as the rotating through parts of the first output shaft, the output end of the planetary gear unit and the motor.

[0027] In an alternative embodiment,

[0028] The rotational speed of the input end of the planetary gear unit is less than that of the output end.

[0029] In an alternative embodiment,

[0030] The distance between the first output shaft and the second output shaft is greater than the sum of the radii of the driving wheel and the driven wheel.

[0031] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0032] A permanent magnet synchronous motor traction machine provided by the present utility model can adjust the rotational speed of the traction wheel under the action of the speed change unit to adapt to different situations in actual applications. The designed differential unit increases the torque of the traction wheel. The braking unit plays an emergency braking role on the motor. Through the adjustment and control of the speed change unit, the braking unit and the motor by the control unit, the operation efficiency of the elevator equipment is improved, which helps to reduce energy consumption and improve the overall performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic diagram of the overall structure of a permanent magnet synchronous motor traction machine provided by an embodiment of the present utility model;

[0035] Figure 2A cross-sectional view of a permanent magnet synchronous motor traction machine provided by an embodiment of the present invention.

[0036] Icon: 1 - motor; 2 - first output shaft; 3 - transmission housing; 4 - traction wheel; 5 - input shaft; 6 - second output shaft; 7 - driving wheel; 8 - conveyor belt; 9 - hydraulic torque converter; 10 - planetary gear unit; 11 - brake; 12 - driven wheel. Specific embodiments

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0041] Embodiment 1

[0042] Please refer to Figure 1 — Figure 2 This embodiment provides a permanent magnet synchronous motor traction machine, including:

[0043] The transmission box body 3 is provided with a motor 1 fixedly mounted on one side thereof, and a traction wheel 4 is rotatably arranged on the side wall of the transmission box body 3 away from the motor 1;

[0044] It further includes:

[0045] A speed change unit for adjusting the output torque and speed of the traction wheel 4, and the speed change unit is located inside the transmission box body 3;

[0046] A differential unit for increasing the torque when the traction wheel 4 is working, and the motor 1 drives the traction wheel 4 to operate through the speed change unit and the differential unit;

[0047] A braking unit for urgently locking the rotor shaft of the motor 1;

[0048] A control unit for regulating the driving state of the motor 1, the transmission ratio of the speed change unit, and the opening and closing state of the braking unit.

[0049] For a permanent magnet synchronous motor traction machine provided by the present utility model, under the action of the speed change unit, the rotation speed of the traction wheel 4 can be adjusted to adapt to different situations in actual applications. The designed differential unit increases the torque of the traction wheel 4, and the braking unit plays an emergency locking and braking role for the motor 1. Through the adjustment and control of the speed change unit, the braking unit, and the motor 1 by the control unit, the operation efficiency of the elevator equipment is improved, which helps to reduce energy consumption and improve the overall performance.

[0050] Based on the above embodiments, in a permanent magnet synchronous motor traction machine provided in this embodiment, the speed change unit includes an input shaft 5 and a second output shaft 6 rotatably assembled inside the transmission box body 3. The output end of the motor 1 is fixedly provided with a first output shaft 2, and the first output shaft 2 is rotatably embedded inside the transmission box body 3. The input shaft 5 and the first output shaft 2 are coaxial. The second output shaft 6 is parallel to the input shaft 5. The outer surfaces of the input shaft 5 and the second output shaft 6 are respectively assembled with a driving wheel 7 and a driven wheel 12, and a conveyor belt 8 is transmission-assembled between the driving wheel 7 and the driven wheel 12;

[0051] The motor 1 is used to drive the first output shaft 2 to rotate, thereby driving the input shaft 5 to rotate. The transmission between the input shaft 5 and the second output shaft 6 is completed through the driving wheel 7, the driven wheel 12, and the conveyor belt 8. The coaxiality of the first output shaft 2 and the input shaft 5 makes the transmission of the conveyor belt 8 smoother.

[0052] The driving wheel 7 and the driven wheel 12 respectively include two separate driving wheel discs and two separate driven wheel discs. The facing surfaces of the two driving wheel discs and the two driven wheel discs are inclined conical surfaces, and the driving wheel 7 and the driven wheel 12 form the outer walls of the V-shaped grooves. The conveyor belt 8 is embedded between the two V-shaped grooves. One of the driving wheel discs and one of the driven wheel discs are respectively fixedly sleeved on the outer surfaces of the input shaft 5 and the second output shaft 6, and the other driving wheel disc and the other driven wheel disc are respectively axially slidably sleeved on the outer surfaces of the input shaft 5 and the second output shaft 6, and the axially slidable driving wheel discs and driven wheel discs are staggeredly distributed. Inside the transmission housing 3, there is also a pushing component that plays a role in adjusting the distance between the two driving wheel discs and the two driven wheel discs;

[0053] The two driving wheel discs and the two driven wheel discs are separated from each other, enabling one of the driving wheel discs and one of the driven wheel discs to axially slide. The V-shaped grooves on the driving wheel 7 and the driven wheel 12 cause the conveyor belt 8 to mesh and contact with them, thereby guiding the transmission of the conveyor belt 8. At the same time, the V-shaped grooves on the driving wheel 7 and the driven wheel 12 facilitate adjusting the working diameter at the meshing position between the conical surface and the conveyor belt 8. Under the action of the pushing component, the staggeredly distributed driving wheel discs and driven wheel discs cause the widths of the V-shaped grooves of the driving wheel 7 and the driven wheel 12 to change synchronously and in opposite directions.

[0054] The pushing component includes a hydraulic push rod fixedly arranged inside the transmission housing 3. The cylinder part of the hydraulic push rod is fixedly assembled with the transmission housing 3, and the output end of the hydraulic push rod is fixedly installed with the axially slidable driving wheel disc and driven wheel disc. Inside the transmission housing 3, there is also an oil pump for driving the hydraulic push rod;

[0055] The pushing component can push the axially slidable driving wheel disc and driven wheel disc, thereby adjusting the widths of the V-shaped grooves of the driving wheel 7 and the driven wheel 12 to meet the requirements of the speed change unit for adjusting the transmission ratio;

[0056] When the hydraulic push rod pushes the width of the V-shaped groove of the driving wheel 7 to become larger, the width of the V-shaped groove of the driven wheel 12 will become smaller accordingly. Conversely, when the hydraulic push rod drives the width of the V-shaped groove of the driving wheel 7 to become smaller in the reverse direction, the width of the V-shaped groove of the driven wheel 12 will become larger accordingly.

[0057] A torque converter 9 is arranged between the first output shaft 2 and the input shaft 5. The torque converter 9 is used to transfer the power and torque of the first output shaft 2 to the input shaft 5;

[0058] The torque converter 9 promotes the smooth start of the traction machine and can amplify the torque of the motor 1, making the start-up process of the traction machine faster. At the same time, the torque converter 9 can also relieve the impact force, thereby extending the service life of the first output shaft 2 and the input shaft 5. The second output shaft 6 is also connected to the input end of the planetary gear unit 10 through a torque converter 9.

[0059] The differential unit includes a planetary gear unit 10 fixedly assembled between the traction wheel 4 and the second output shaft 6. The output end of the planetary gear unit 10 rotates through the transmission housing 3, and the traction wheel 4 is fixedly sleeved on the outer surface of the output end of the planetary gear unit 10. The input end of the planetary gear unit 10 is connected to the second output shaft 6 through a coupling;

[0060] The planetary gear unit 10 can achieve different transmission ratios to meet different speed and torque requirements.

[0061] The control unit includes a control cabinet fixed to the transmission housing 3 and a microcomputer installed inside the control cabinet;

[0062] A variety of sensors such as a load sensor, a speed sensor, and a temperature sensor are fixedly arranged inside or outside the transmission housing 3. The microcomputer receives the information output by the various sensors. The sensors monitor parameters such as load, speed, and temperature in real time. The microcomputer calculates and judges at any time according to the information provided by the sensors such as the passenger weight of the elevator car, the speed of the traction machine, and the distance of the elevator ascending or descending, and issues control instructions to the motor 1, the speed change unit, and the braking unit.

[0063] The braking unit includes a brake 11 fixedly arranged at one end of the motor 1 away from the transmission housing 3. The brake 11 has two states of locking and not locking the rotor shaft of the motor 1;

[0064] When the motor 1 gets out of control and its internal rotor shaft rotates rapidly under the action of external force, the brake 11 can urgently lock and brake the rotor shaft to avoid elevator accidents.

[0065] Lubricants are applied to the rotating parts of the input shaft 5, the second output shaft 6 and the transmission housing 3, as well as the rotating through part of the output end of the planetary gear unit 10 and the motor 1;

[0066] The lubricating oil makes the rotation of the input shaft 5, the first output shaft 2, the second output shaft 6 and the planetary gear unit 10 smoother.

[0067] The rotational speed of the input end of the planetary gear unit 10 is less than that of the output end;

[0068] The planetary gear unit 10 is used to reduce the output speed of the second output shaft 6, thereby increasing the torque.

[0069] The distance between the first output shaft 2 and the second output shaft 6 is greater than the sum of the radius of the driving wheel 7 and the radius of the driven wheel 12;

[0070] The distance between the first output shaft 2 and the second output shaft 6 avoids the situation of mutual interference between the driving wheel 7 and the driven wheel 12, and at the same time enables the conveyor belt 8 to smoothly change its diameter to adjust the transmission ratio.

[0071] Working principle:

[0072] The running program in the microcomputer controls the opening and closing of the motor 1. The output end of the motor 1 drives the first output shaft 2 to rotate. The speed and torque of the first output shaft 2 are transmitted to the input shaft 5 through the hydrodynamic torque converter 9, so as to drive the driving wheel 7 to rotate by the input shaft 5. The driven wheel 12 sleeved on the outer surface of the second output shaft 6 is driven by the driving belt 8 between the driving wheel 7, so that the second output shaft 6 rotates, and under the deceleration and torque increasing action of the planetary gear unit 10, the traction wheel 4 operates.

[0073] The hydraulic push rod drives the axially sliding driving wheel disc and the driven wheel disc to slide synchronously and in the same direction on the outer surfaces of the input shaft 5 and the second output shaft 6 respectively through the operation of the oil pump, so as to adjust the V-groove width distance between the driving wheel 7 and the driven wheel 12, thereby changing the working diameter of the meshing point between the V-grooves of the driving wheel 7 and the driven wheel 12 and the driving belt 8, so that when the diameter of one pulley increases, the diameter of the other pulley will decrease, and thus the transmission ratio is changed;

[0074] When the meshing diameter between the driving wheel 7 and the driving belt 8 is smaller than the meshing diameter between the driven wheel 12 and the driving belt 8, the speed change unit is in a deceleration state to increase the torque. When the meshing diameter between the driving wheel 7 and the driving belt 8 is larger than the meshing diameter between the driven wheel 12 and the driving belt 8, the speed change unit is in an acceleration state to increase the speed.

[0075] The combined use of multiple sensors can real-time monitor the load of the elevator and the speed of the traction wheel 4, and transmit the collected data to the converter. The converter converts the data into electrical signals. After receiving the electrical signals, the microcomputer calculates, processes and judges the data collected by the sensors. Finally, the microcomputer outputs operation instructions to the motor 1, the oil pump and the brake 11, and then dynamically adjusts the transmission ratio of the motor 1 and the speed change unit, and controls the emergency braking of the motor 1.

[0076] Embodiment 2

[0077] Please refer to Figure 1 , another implementation manner of the conveyor belt 8 described in this embodiment:

[0078] The conveyor belt 8 includes push pieces that contact the V-grooves in the driving wheel 7 and the driven wheel 12. The push pieces are composed of at least four hundred high-strength pressure steel pieces butt-jointed in sequence from head to tail, and annular steel belts are installed on both sides of the push pieces. Each bundle of annular steel belts is composed of twelve high-tensile thin steel pieces stacked together.

[0079] In this embodiment:

[0080] The function of the annular steel belt is to press the pushing piece tightly on the V-grooves of the driving wheel 7 and the driven wheel 12, so as to cause sufficient frictional force between the pushing piece and the driving wheel 7 and the driven wheel 12, and transmit torque through the pressure generated by the extrusion of the V-grooves of the driving wheel 7 and the driven wheel 12 and the pushing piece.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A permanent magnet synchronous motor traction machine, characterized in that: include: A transmission case (3), a motor (1) being fixedly mounted on one side of the transmission case (3), and a traction wheel (4) being rotatably arranged on a side wall of the transmission case (3) away from the motor (1); Also includes: A speed change unit, used for adjusting the output torque and speed of the traction wheel (4), wherein the speed change unit is located inside the transmission housing (3); A differential unit, used to increase the torque of the traction wheel (4) when it is working, and the motor (1) drives the traction wheel (4) to operate through the speed change unit and the differential unit; A brake unit for performing an emergency locking operation on the rotor shaft of the motor (1); A control unit is used to regulate the transmission state of the motor (1), the transmission ratio of the speed change unit, and the on / off state of the brake unit.

2. The permanent magnet synchronous motor traction machine according to claim 1, characterized in that: The speed change unit comprises an input shaft (5) and a second output shaft (6) which are rotatably mounted inside the transmission housing (3); a first output shaft (2) is fixedly arranged at the output end of the motor (1), and the first output shaft (2) is rotatably embedded inside the transmission housing (3); the input shaft (5) and the first output shaft (2) are coaxial, and the second output shaft (6) and the input shaft (5) are arranged in parallel; a driving wheel (7) and a driven wheel (12) are respectively mounted on the outer surfaces of the input shaft (5) and the second output shaft (6), and a transmission belt (8) is mounted between the driving wheel (7) and the driven wheel (12); The driving wheel (7) and the driven wheel (12) respectively include two separated driving wheel discs and two separated driven wheel discs, the facing surfaces of the two driving wheel discs and the two driven wheel discs are inclined conical surfaces, and the driving wheel (7) and the driven wheel (12) form the outer wall of a V-shaped groove, and the conveyor belt (8) is embedded between the two V-shaped grooves, one of the driving wheel discs and one of the driven wheel discs are respectively fixedly mounted on the outer surfaces of the input shaft (5) and the second output shaft (6), and the other driving wheel disc and the other driven wheel disc are respectively axially slidably mounted on the outer surfaces of the input shaft (5) and the second output shaft (6), and the axially slidable driving wheel discs and the driven wheel discs are staggered, and the transmission housing (3) is also provided with a push assembly for adjusting the distance of the two driving wheel discs and the two driven wheel discs.

3. The permanent magnet synchronous motor traction machine according to claim 2, characterized in that: The pushing assembly comprises a hydraulic push rod fixedly arranged inside the transmission housing (3); the cylinder portion of the hydraulic push rod is fixedly assembled with the transmission housing (3); the output end of the hydraulic push rod is fixedly installed with the axially sliding driving wheel disc and the driven wheel disc; and an oil pump for driving the hydraulic push rod is also arranged inside the transmission housing (3).

4. The permanent magnet synchronous motor traction machine according to claim 2, characterized in that: A hydraulic torque converter (9) is provided between the first output shaft (2) and the input shaft (5), and the hydraulic torque converter (9) is used to transmit the power and torque of the first output shaft (2) to the input shaft (5).

5. The permanent magnet synchronous motor traction machine according to claim 2, characterized in that: The differential unit comprises a planetary gear (10) fixedly mounted between the traction wheel (4) and the second output shaft (6); the output end of the planetary gear (10) rotates through the transmission case (3), and the traction wheel (4) is fixedly sleeved on the outer surface of the output end of the planetary gear (10); the input end of the planetary gear (10) is connected to the second output shaft (6) via a coupling.

6. The permanent magnet synchronous motor traction machine according to claim 1, characterized in that: The control unit comprises a control cabinet fixed to the transmission housing (3), and a microcomputer installed inside the control cabinet.

7. The permanent magnet synchronous motor traction machine according to claim 6, characterized in that: The brake unit comprises a brake (11) fixedly arranged at one end of the motor (1) away from the transmission housing (3), and the brake (11) has two states of locking and non-locking for the rotor shaft of the motor (1).

8. The permanent magnet synchronous motor traction machine according to claim 5, characterized in that: The rotating parts of the input shaft (5), the second output shaft (6) and the transmission housing (3), as well as the rotating parts of the first output shaft (2), the output end of the planetary gear (10) and the motor (1) are all coated with lubricant.

9. The permanent magnet synchronous motor traction machine according to claim 5, characterized in that: The rotation speed of the input end of the planetary gear (10) is lower than the rotation speed of the output end.

10. The permanent magnet synchronous motor traction machine according to claim 2, characterized in that: The distance between the first output shaft (2) and the second output shaft (6) is greater than the sum of the radius of the driving wheel (7) and the radius of the driven wheel (12).

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