Elevator traction machine with overheating protection device

Abstract

The elevator traction machine comprises a machine base and a stator assembly installed on the machine base, an installation part is arranged on the machine base, a containing groove is formed in the installation part, one side of the containing groove penetrates through the side wall of the installation part, and the overheating protection device is installed in the containing groove. The overheating protection device comprises a containing assembly and a temperature sensor, the temperature sensor is placed in the containing assembly, the detection end of the temperature sensor makes contact with the containing assembly, one side of the containing assembly is elastically connected into the containing groove, and the outer surface of the other side of the containing assembly makes contact with the outer surface of the stator assembly. The main purpose of the utility model is to provide the elevator traction machine with the overheating protection device, which can realize overheating protection and is convenient to maintain and replace.

Description

Technical Field

[0001] The utility model relates to an elevator traction machine, in particular to an elevator traction machine with an overheat protection device. Background Art

[0002] The traction machine is the core component of the elevator system. Most of the elevator traction machines on the market are permanent magnet synchronous traction machines. The excitation source of the permanent magnet traction machine is permanent magnet steel. The permanent magnet steel is very sensitive to temperature. After reaching the temperature limit, the magnet steel is prone to irreversible demagnetization. After demagnetization, an accident will occur at the next startup due to the demagnetization of the magnet steel, which will bring safety hazards to the entire elevator system. In order to avoid this situation, the prior art generally embeds thermistors in the traction machine and encapsulates them. During operation, when the temperature of the traction machine is detected to rise to a certain level, it stops running to protect the traction machine. However, with this structure, when the thermistor is damaged, it cannot be replaced or repaired. If it is left alone, there will still be a large safety hazard. If it is repaired or replaced, the entire traction machine needs to be replaced, which is very costly. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide an elevator traction machine with an overheating protection device which can achieve overheating protection and is easy to repair and replace.

[0004] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0005] An elevator traction machine with an overheat protection device comprises a machine base and a stator assembly mounted on the machine base, the machine base is provided with a mounting portion, a placement groove is provided on the mounting portion, one side of the placement groove penetrates through the side wall of the mounting portion, an overheat protection device is installed in the placement groove, the overheat protection device comprises a housing assembly and a temperature sensor, the temperature sensor is placed in the housing assembly, and a detection end of the temperature sensor contacts the housing assembly, one side of the housing assembly is elastically connected in the placement groove, and the outer surface of the other side of the housing assembly contacts the outer surface of the stator assembly.

[0006] Furthermore, the containing assembly includes a cover plate and a containing box, one end of the containing box is provided with an opening, the temperature sensor is placed in the containing box, the cover plate is detachably connected to the open end of the containing box, and a surface of the containing box close to the stator assembly is an arc-shaped surface that fits the outer surface of the stator assembly.

[0007] Furthermore, one end of an elastic member is fixedly connected to the containing box, the other end of the elastic member is fixedly connected to a connecting seat, and the connecting seat is installed in the placement groove.

[0008] Furthermore, a limiting groove is recessed inwardly on the side wall of the placement groove, one end of the connecting seat is inserted into the above-mentioned limiting groove, and the other end of the connecting seat is connected to the mounting part by a bolt.

[0009] Furthermore, a closed annular groove is provided on the end surface of the opening end of the accommodating box, and a sealing ring is provided on the inner side surface of the cover plate, and the sealing ring is plugged into and matched with the groove.

[0010] Furthermore, a guide groove is fixedly provided on the outer side of the accommodating box, and the axis of the guide groove is distributed along the radial direction of the stator assembly. A guide column is cooperated with the connecting seat, and the guide column is slidably matched with the guide groove.

[0011] Furthermore, the stator assembly includes a stator core and a stator coil, and the stator coil is located outside the stator core.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: in the utility model, the temperature sensor is placed in a housing box with thermal conductivity and insulation, which can effectively prevent the stator core or stator coil from entering high voltage without affecting the normal temperature detection of the temperature sensor; with this design, when the temperature sensor is damaged, it can be easily replaced or repaired without replacing the entire traction machine, thereby greatly reducing the use cost and maintenance cost; at the same time, the housing box adopts an elastic connection method, which can effectively ensure the reliability of the fit between the housing box and the outer surface of the stator coil, thereby ensuring efficient and reliable heat conduction, and thereby ensuring the accuracy and real-time nature of the temperature sensor detection results; the overall structural design is reasonable, the controllability is strong, and the reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of an elevator traction machine with an overheat protection device according to the utility model;

[0014] Figure 2 This is a front view of an elevator traction machine with an overheat protection device according to the utility model;

[0015] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure cut along the AA direction;

[0016] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure cut along the BB direction;

[0017] Among them, 1. base; 11. mounting part; 12. placement slot; 121. limit slot; 2. stator coil; 3. stator core; 4. connecting seat; 41. guide column; 5. containing assembly; 51. cover plate; 511. sealing ring; 52. containing box; 521. groove; 522. arc surface; 523. guide slot; 53. elastic part; 6. temperature sensor. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] It should be noted that, in the description of the technical solution of the present invention, some directional words used to clearly describe the technical features of the present invention, such as "front", "back", "up", "down", "top", "bottom", "inside", "outside", etc., are all in accordance with the orientation of the drawings of the present invention.

[0020] Example

[0021] like Figure 1 and Figure 2 As shown, an elevator traction machine with an overheat protection device in this embodiment includes a machine base 1 and a stator assembly mounted on the machine base 1, wherein the stator assembly includes a stator core 3 and a stator coil 2, and the stator coil 2 is located outside the stator core 3. A mounting portion 11 is provided on the machine base 1, and a placement groove 12 is provided on the mounting portion 11. One side of the placement groove 12 penetrates the side wall of the mounting portion 11, and the other side of the placement groove 12 is connected to the stator assembly. An overheat protection device is installed in the placement groove 12, and the overheat protection device includes a receiving assembly 5 and a temperature sensor 6. The temperature sensor 6 is placed in the receiving assembly 5, and the detection end of the temperature sensor 6 is in contact with the receiving assembly 5. One side of the receiving assembly 5 is elastically connected in the placement groove 12, and the outer surface of the other side of the receiving assembly 5 is in contact with the outer surface of the stator assembly.

[0022] Specifically, Figure 3 and Figure 4As shown, the containing assembly 5 includes a cover plate 51 and a containing box 52. Both the cover plate 51 and the containing box 52 are made of insulating heat-conducting materials, which can not only efficiently conduct heat to the detection end of the temperature sensor 6, but also prevent the stator core 3 or the stator coil 2 from entering the high voltage when the temperature sensor 6 is damaged, thereby causing damage or influence on the main control board of the elevator control system. The containing box 52 has a containing space, and an opening is provided at one end of the containing box 52, and the opening connects the containing space with the outside of the containing box 52. The temperature sensor 6 is placed in the containing space of the containing box 52. The cover plate 51 is detachably connected to the open end of the containing box 52. Specifically, in this embodiment, the detachable connection method between the cover plate 51 and the containing box 52 is a snap connection or a bolt connection. The snap connection or the bolt connection is a conventional technical means in the prior art, so it will not be described in detail. The side of the containing box 52 close to the stator coil 2 is an arcuate surface 522 that fits the outer surface of the stator coil 2. The arcuate surface 522 that fits the outer surface of the stator coil 2 can increase the contact area between the containing box 52 and the stator assembly, thereby improving the thermal conductivity efficiency of heat conducted to the inside, thereby improving the detection sensitivity of the temperature sensor 6.

[0023] In this embodiment, a closed annular groove 521 is provided on the end surface of the opening end of the receiving box 52, and a sealing ring 511 is provided on the inner side surface of the cover plate 51, and the sealing ring 511 is plugged into the groove 521. When the cover plate 51 is installed at the opening end of the receiving box 52, the sealing ring 511 is located in the groove 521, and the end of the sealing ring 511 abuts against the bottom of the groove 521 to improve the sealing performance between the cover plate 51 and the receiving box 52. The sealing ring 511 is made of insulating rubber material and has good insulation performance.

[0024] In addition, in order to improve the reliability of the fit between the arc surface 522 of the container box 52 and the outer surface of the stator coil 2, an elastic member 53 is provided between the container box 52 and the placement groove 12 in this embodiment, and the axis of the elastic member 53 is distributed along the radial direction of the stator assembly. Specifically, one end of the elastic member 53 is fixedly connected to the container box 52, and the other end of the elastic member 53 is fixedly connected to the connecting seat 4, and the connecting seat 4 is installed in the placement groove 12. With this structural design, when the arc surface 522 of the container box 52 fits the outer surface of the stator coil 2, the elastic member 53 is in a compressed state, so that the container box 52 can always maintain a certain tightness against the outer surface of the stator coil 2 under the action of the rebound force of the elastic member 53, thereby ensuring that the arc surface 522 can always fit the outer surface of the stator coil 2, and will not separate due to the shaking or vibration of the elevator traction machine, thereby ensuring the reliability of the fit between the arc surface 522 and the outer surface of the stator coil 2. In this embodiment, the elastic member 53 is an elastic spring or an elastic sheet.

[0025] In order to ensure that the moving track of the receiving box 52 moves along the radial direction of the stator coil 2, in this embodiment, a guide groove 523 is fixedly provided on the outer side of the receiving box 52, and the axis of the guide groove 523 is distributed along the radial direction of the stator assembly. At the same time, a guide column 41 is provided on the connecting seat 4, and the guide column 41 is slidably matched with the guide groove 523. When the receiving box 52 moves along the radial direction of the stator assembly, the guide column 41 is always slidably connected in the guide groove 523 to play a guiding role.

[0026] The connection seat 4 of this embodiment adopts a detachable installation method. Specifically, a limit groove 121 is recessed inwardly on the side wall of the placement groove 12. One end of the connection seat 4 is inserted into the above-mentioned limit groove 121, and the other end of the connection seat 4 is connected to the installation part 11 by a bolt (refer to Figure 1 or Figure 3 It should be noted that the connection base 4 can also be installed in the placement groove 12 in a fixed installation manner. When the connection base 4 is fixedly installed, the receiving box 52 connected to the connection base 4 cannot be disassembled, and the temperature sensor 6 can only be repaired and replaced by removing the cover plate 51.

[0027] When the elevator traction machine is in use, the heat on the stator core 3 and the stator coil 2 is transferred to the detection end of the temperature sensor 6 inside the housing box 52 through the matching arc surface 522. When the temperature sensor 6 detects that the temperature value is too high, an alarm message is generated and transmitted to the main control board of the elevator control system. When the temperature sensor 6 is damaged, the lower cover 51 can be removed for convenient maintenance or replacement.

[0028] The utility model is an elevator traction machine with an overheat protection device, in which the temperature sensor 6 is placed in a housing box 52 with heat conduction function and insulation. Under the condition that the temperature sensor 6 does not affect the normal temperature detection, the stator core 3 or the stator coil 2 can be effectively prevented from entering the high voltage. With this design, when the temperature sensor 6 is damaged, it can be conveniently replaced or repaired without replacing the entire traction machine, thereby greatly reducing the use cost and maintenance cost. At the same time, the housing box 52 adopts an elastic connection method, which can effectively ensure the reliability of the fit between the housing box 52 and the outer surface of the stator coil 2, thereby ensuring the efficient and reliable heat conduction, and thereby ensuring the accuracy and real-time nature of the detection result of the temperature sensor 6. The overall structural design is reasonable, the controllability is strong, and the reliability is high.

[0029] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the utility model.

Claims

1. An elevator traction machine with an overheat protection device, characterized in that: The invention comprises a machine base (1) and a stator assembly mounted on the machine base (1); the machine base (1) is provided with a mounting portion (11); the mounting portion (11) is provided with a placement groove (12); one side of the placement groove (12) penetrates through the side wall of the mounting portion (11); an overheat protection device is installed in the placement groove (12); the overheat protection device comprises a receiving component (5) and a temperature sensor (6); the temperature sensor (6) is placed in the receiving component (5), and a detection end of the temperature sensor (6) is in contact with the receiving component (5); one side of the receiving component (5) is elastically connected to the placement groove (12), and the outer surface of the other side of the receiving component (5) is in contact with the outer surface of the stator assembly.

2. The elevator traction machine with an overheat protection device according to claim 1, characterized in that: The containing assembly (5) comprises a cover plate (51) and a containing box (52); one end of the containing box (52) is provided with an opening; the temperature sensor (6) is placed in the containing box (52); the cover plate (51) is detachably connected to the open end of the containing box (52); and a surface of the containing box (52) close to the stator assembly is an arc-shaped surface (522) that fits the outer surface of the stator assembly.

3. The elevator traction machine with an overheat protection device according to claim 2, characterized in that: One end of an elastic member (53) is fixedly connected to the containing box (52), and the other end of the elastic member (53) is fixedly connected to a connecting seat (4), and the connecting seat (4) is installed in the placement groove (12).

4. The elevator traction machine with an overheat protection device according to claim 3, characterized in that: A limiting groove (121) is recessed inwardly on the side wall of the placement groove (12), one end of the connection seat (4) is inserted into the limiting groove (121), and the other end of the connection seat (4) is connected to the mounting portion (11) via bolts.

5. The elevator traction machine with an overheat protection device according to claim 2, characterized in that: A closed annular groove (521) is provided on the open end surface of the containing box (52), and a sealing ring (511) is provided on the inner side surface of the cover plate (51), and the sealing ring (511) is plugged into and matched with the groove (521).

6. The elevator traction machine with an overheat protection device according to claim 4, characterized in that: A guide groove (523) is fixedly provided on the outer side of the containing box (52), and the axis of the guide groove (523) is distributed along the radial direction of the stator assembly. A guide column (41) is provided on the connecting seat (4), and the guide column (41) is slidably matched with the guide groove (523).

7. The elevator traction machine with an overheat protection device according to claim 1, characterized in that: The stator assembly comprises a stator core (3) and a stator coil (2), wherein the stator coil (2) is located outside the stator core (3).

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