Thin traction machine for elevator
By designing an internal rotor structure, the excitation coil is placed outside the traction machine housing and combined with a permanent magnet to form a radial magnetic field, which solves the heat dissipation and size problems of the thin traction machine and achieves efficient heat dissipation and high-efficiency traction machine operation.
Patent Information
- Application Number
- CN202422638735.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-10-30
AI Technical Summary
Existing thin traction machines suffer from poor heat dissipation and large size. In particular, traction machines with external rotor structures have difficulty dissipating heat, resulting in a large temperature rise.
The internal rotor structure is adopted, with the excitation coil as the stator set outside the traction machine housing. Permanent magnets are installed on the outer surface of the rotor to form a radial magnetic field, which increases the heat dissipation area and reduces the coil temperature rise, while taking into account the small thickness of the external rotor traction machine.
It improves the heat dissipation performance of the traction machine, reduces temperature rise, increases the utilization rate of the machine room and shaft, and improves the efficiency of the traction machine.
Smart Images
Figure CN223583919U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power equipment technical field, in particular to a thin type tractor for elevator. BACKGROUND
[0002] The elevator tractor is the power equipment of the elevator, also called the elevator main machine, and the function is to transport and transmit power to make the elevator run. In recent years, with the progress of technology, more and more thin type tractors are used, which have the characteristics of no machine room and no load on the top of the shaft, can maximize the usable space of the building, save construction time, materials and cost, and only need to use small hoisting equipment to install, which is convenient and convenient to maintain.
[0003] But the current thin type tractor all adopts the structure of outer rotor, that is, the excitation coil is fixed on the tractor shell as the stator of the tractor, and the rotor part is provided with magnetic steel and arranged around the outer circumference of the stator coil. Since the rotor coil is located in the area close to the center of the tractor, it is not conducive to the dissipation of the heat of the rotor coil, which is easy to cause the temperature rise of the tractor to be large, affecting the heat dissipation.
[0004] Therefore, how to provide a thin type tractor for elevator with small volume and excellent heat dissipation performance is a problem to be solved by those skilled in the art. UTILITY MODEL CONTENTS
[0005] Therefore, the utility model provides a thin type tractor for elevator to solve the problems of poor heat dissipation performance of the thin type outer rotor tractor and large volume of the conventional inner rotor tractor.
[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme:
[0007] A thin type tractor for elevator, comprising a support shell, a main shaft, a stator and a rotor;
[0008] Among them, the stator is located outside the support shell, the rotor is installed on the main shaft, and the stator is arranged around the outside of the rotor to form a radial magnetic field.
[0009] Preferably, in the above thin type tractor for elevator, a permanent magnet is further included, the permanent magnet is installed on the outer surface of the rotor, and the permanent magnet is connected with the outer surface of the rotor.
[0010] Preferably, in the above thin type tractor for elevator, a traction wheel is further included, the traction wheel is connected with the rotor and arranged on one side of the protrusion of the rotor.
[0011] Preferably, in the above thin type tractor for elevator, a motor is further included, which is used to provide power to the tractor and drive the tractor to rotate;
[0012] The stator of the motor is mounted outside the rotor by a motor bearing, and the motor bearing is located on the side of the stator close to the traction sheave.
[0013] Preferably, in the thin traction machine for elevator, a bearing is arranged on the main shaft, and an outer ring of the bearing is connected with the rotor.
[0014] Preferably, in the thin traction machine for elevator, an encoder is arranged at a middle position of the main shaft, and the encoder cooperates with the rotor.
[0015] Preferably, in the thin traction machine for elevator, a brake is arranged on the housing of the motor.
[0016] The thin traction machine for elevator has the advantages that, compared with the prior art, it has the beneficial effects that:
[0017] The thin traction machine for elevator has the advantages that, compared with the prior art, it has the beneficial effects that:
[0018] The stator is close to the outer housing of the traction machine, and has a larger heat dissipation area, which is beneficial to heat dissipation of the coil, realizes lower temperature rise of the traction machine, and the stator is arranged at an outer circumference of the permanent magnet, so that conversion of the excitation magnetic field can generate greater torque, and the traction machine has higher efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the provided drawings without creative labor.
[0020] Figure 1 is a structural schematic view of the thin traction machine for elevator in the embodiments of the present application.
[0021] In the drawings:
[0022] 100 is a support housing, 200 is a main shaft, 210 is a bearing, 300 is a stator, 400 is a rotor, 410 is a permanent magnet, 500 is a traction sheave, 600 is a motor, 610 is a motor bearing, 700 is an encoder, and 800 is a brake. DETAILED DESCRIPTION
[0023] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.
[0024] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0025] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.
[0026] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0027] The existing elevator hoist usually has the problems of long motor stator and rotor, large hoist volume, and relatively low hoist efficiency if the inner rotor structure is adopted; and if the outer rotor structure is adopted, the problem of poor heat dissipation performance exists, which is easy to cause large temperature rise of the hoist.
[0028] Therefore, the utility model embodiment provides a thin hoist for elevator, as shown in the figure, comprising a support shell 100, a main shaft 200, a stator 300 and a rotor 400, the rotor 400 rotates around the main shaft 200 and is coaxially arranged relative to the stator 300. Figure 1
[0029] Among them, the stator 300 is located outside the support shell 100, and specifically the excitation coil is fixed on the support shell 100 as the stator 300 of the hoist;
[0030] The rotor 400 is also located inside the support shell 100, and the rotor 400 is installed on the main shaft 200, the outer surface of the rotor 400 is provided with permanent magnets 410, and the stator 300 is provided on the outer circumferential side of the permanent magnets 410, that is, the side of the permanent magnets 410 is in contact with the outer wall of the rotor 400, and the other side is in contact with the inner wall of the stator 300, and the stator 300 forms a radial magnetic field.
[0031] The utility model discloses a structure design, on the basis of reserving the thickness of tractor, set up excitation coil as stator 300 on the tractor shell, the excitation coil is in close proximity to the permanent magnet 410 of the surface of rotor 400, and the excitation coil is close to the circumferential shell of tractor, and it is favorable for coil heat dissipation to reduce the temperature rise of tractor coil, and the structure of the inner rotor 400 can take into account the characteristics of the small thickness of the outer rotor 400 tractor, which is convenient for the arrangement of the tractor in the machine room and the shaft, and improves the utilization rate of the machine room or the shaft.
[0032] In some embodiments of the utility model, the tractor further includes a traction wheel 500, which is connected with the rotor 400 and arranged on one side of the protrusion of the rotor 400. The rotor 400 and the traction wheel 500 can be an integral structure.
[0033] In some embodiments of the utility model, a motor 600 is further included, which is located in the motor 600 shell and installed on the support shell 100. The motor 600 is used to provide power to the tractor and drive the tractor to rotate. The stator 300 of the motor 600 is installed on the outer circumferential side of the rotor 400 through the motor bearing 610, and the motor 600 bearing 210 is located on the side of the stator 300 close to the traction wheel 500.
[0034] In some embodiments of the utility model, a bearing 210 is arranged on the main shaft 200, and the outer ring of the bearing 210 is connected with the inner side of the rotor 400. When the tractor operates, the main shaft 200 and the inner ring of the bearing 210 matched therewith do not rotate, and the rotor 400 and the outer ring of the bearing 210 matched therewith rotate around the main shaft 200.
[0035] Further, an encoder 700 is installed at the middle position of the main shaft 200, and the encoder 700 is connected with the rotor 400.
[0036] It can be understood that the encoder 700 can be fixed on the support seat and installed on the main shaft 200 through the counterbore and matched with the rotor 400. In addition, the encoder 700 can be located away from the traction wheel 500 side or close to the traction wheel 500 side, and the specific setting is according to the actual operation condition.
[0037] In some embodiments of the utility model, a brake 800 is installed on the shell of the motor 600.
[0038] It can be understood that the brake 800 can be a lever outer drum brake, a disc brake or a straight push drum (block) brake, etc.
[0039] The working principle of the thin traction machine for elevator is as follows: when the elevator car needs to move up and down, the brake is opened, the pulse power is input to the motor stator coil to generate an excitation field, the rotor permanent magnet rotates under the action of the coil excitation magnetic field, the motor provides power to the traction sheave, the steel wire rope rotates together driven by the traction sheave, and the elevator car moves up and down driven by the steel wire rope.
[0040] To sum up, the utility model discloses an inner rotor structure, and simultaneously considers the small thickness feature of the outer rotor traction machine, reduces the use amount of raw materials, facilitates the arrangement of the traction machine in the machine room and the shaft, and improves the utilization rate of the machine room or the shaft.
[0041] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and replacements can be made without departing from the technical principle of the utility model, and these improvements and replacements should also be regarded as the protection scope of the utility model.
Claims
1. A thin-type hoisting machine for an elevator, comprising a support casing, a main shaft, characterized in that, Also comprising: a stator located outside the support housing; a rotor mounted on the main shaft, and the stator is arranged outside the rotor to form a radial magnetic field.
2. The thin-type elevator hoist motor according to claim 1, characterized by Also comprising a permanent magnet mounted on the outer surface of the rotor, and the permanent magnet is connected with the outer surface of the rotor.
3. The thin-type elevator hoist motor according to claim 1, characterized by Also comprising a traction wheel connected with the rotor and arranged on one side of the protrusion of the rotor.
4. The thin-type elevator hoist motor according to claim 3, characterized by Also comprising a motor for providing power to the traction machine and driving the traction machine to rotate; The stator of the motor is mounted outside the rotor through a motor bearing, and the motor bearing is located on the side of the stator close to the traction wheel.
5. The thin-type elevator hoist motor of claim 1, wherein The main shaft is provided with a bearing, and the outer ring of the bearing is connected with the rotor.
6. The thin-type elevator hoist motor of claim 1, wherein An encoder is mounted on the middle position of the main shaft, and the encoder cooperates with the rotor.
7. The thin-type elevator hoist motor of claim 4, wherein A brake is mounted on the shell of the motor.
8. The thin-type elevator hoisting machine according to any one of claims 1 to 7, characterized by The stator is an excitation coil.