A three-phase asynchronous motor with overheat protection device

Abstract

The utility model discloses a three-phase asynchronous motor with an overheat protection device, belonging to the technical field of motors, comprising: a three-phase asynchronous motor body; a plurality of heat-conducting boxes arranged in a ring array and detachably connected to the outer periphery of the three-phase asynchronous motor body, a heat-conducting liquid for overheat protection is arranged in the heat-conducting boxes, and two adjacent heat-conducting boxes are connected through a liquid-passing pipe; the tops of the two uppermost heat-conducting boxes are connected with a vent pipe and a connecting pipe with a solenoid valve; a heat-conducting pipe is arranged on the outer periphery of the three-phase asynchronous motor body, and is connected and fixed to the three-phase asynchronous motor body through a plurality of heat-conducting rods, the inner wall of the heat-conducting pipe is provided with two internal threads, and two filter rings are connected by the threads; the inner cavity of the filter ring is provided with a storage ring, and a dustproof net and a plurality of connecting rods are connected between the storage ring and the filter ring. The three-phase asynchronous motor with an overheat protection device can perform double heat dissipation to achieve overheat protection.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, in particular to a three-phase asynchronous motor with an overheat protection device. Background Art

[0002] The three-phase asynchronous motor is a type of induction motor, which is powered by 380V three-phase AC current (phase difference of 120 degrees) at the same time. Since the rotor and stator rotating magnetic fields of the three-phase asynchronous motor rotate in the same direction and at different speeds, there is a slip rate, so it is called a three-phase asynchronous motor. The three-phase asynchronous motor needs to be set with overheat protection to protect the motor. Traditional overheat protection mostly uses fans for heat dissipation, which is generally ineffective.

[0003] After searching, the Chinese patent document (authorization announcement number CN114884271A) has a permanent magnet synchronous motor with overheat protection function, which is easy to install and maintain, and can increase the heat dissipation effect of the permanent magnet synchronous motor. It can not only protect the magnetic synchronous motor and prevent external objects from colliding with the permanent magnet synchronous motor, but also effectively improve the ventilation and heat dissipation efficiency, thereby ensuring the long-term stable operation of the permanent magnet synchronous motor, and solving the problem that the existing permanent magnet synchronous motor does not have the function of overheat protection when in use, and the surface temperature of the permanent magnet synchronous motor is too high after working for a long time, and it is easy to be dangerous if the operator accidentally touches it. Although heat dissipation protection can be performed, only the fan is used for heat dissipation, and the effect is average. Utility Model Content

[0004] The utility model aims to provide a three-phase asynchronous motor with an overheat protection device to solve the problems raised in the background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a three-phase asynchronous motor with an overheat protection device, comprising:

[0006] Three-phase asynchronous motor body;

[0007] A plurality of heat conduction boxes are arranged in a ring array and can be detachably connected to the outer periphery of the three-phase asynchronous motor body. Heat conduction liquid for overheat protection is arranged in the heat conduction boxes, and two adjacent heat conduction boxes are connected through a liquid pipe;

[0008] The top ends of the two uppermost heat transfer boxes are connected with a vent pipe and a connecting pipe with a solenoid valve;

[0009] The heat conducting pipe is arranged on the outer periphery of the three-phase asynchronous motor body and is connected and fixed to the three-phase asynchronous motor body through a plurality of heat conducting rods. The inner wall of the heat conducting pipe is provided with two internal threads, and the threads are connected to two filter rings.

[0010] The inner cavity of the filter ring is provided with a storage ring, and a dustproof net and multiple connecting rods are connected between the storage ring and the filter ring. The output shaft of the three-phase asynchronous motor body passes through one of the storage rings, and a fan for overheating protection is installed on the side of the multiple connecting rods of the other filter ring.

[0011] As a preferred embodiment, the ventilation pipe and the connecting pipe pass through the heat conducting pipe and extend to the outside of the heat conducting pipe.

[0012] As a preferred embodiment, a mounting plate is welded to the bottom end of the heat conducting pipe, and the mounting plate is connected and fixed to the heat conducting pipe via a plurality of connecting plates.

[0013] As a preferred embodiment, a plurality of circular channels for the bolts to pass through are provided at the top of the assembly plate.

[0014] As a preferred embodiment, a temperature sensor and an alarm are installed on the side of the three-phase asynchronous motor body.

[0015] As a preferred embodiment, the inner wall of the storage ring near the fan is also connected to a dustproof net for filtering the air, and the side of the storage ring is connected to a bearing.

[0016] As a preferred embodiment, the bearing includes a fixed outer ring and a movable inner ring rotatably connected thereto, and a cleaning brush for cleaning the dustproof net is connected to the side of the movable inner ring of the bearing.

[0017] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0018] The three-phase asynchronous motor with overheat protection device, during the normal operation of the three-phase asynchronous motor body, the heat conduction box cooperates with the heat conduction liquid to conduct heat dissipation. If the temperature sensor detects that the temperature exceeds the threshold, the fan is started to blow air to dissipate heat, thereby realizing overheat protection, which can not only dissipate the heat of the three-phase asynchronous motor body, but also assist the heat conduction box in dissipating heat.

[0019] The three-phase asynchronous motor with overheat protection device, if the heat of the three-phase asynchronous motor body is too high during operation, two connecting pipes can be connected to the liquid adding device and the liquid receiving device respectively, and new heat transfer liquid can be continuously introduced into the heat transfer box. During the flow process, part of the heat of the three-phase asynchronous motor body is taken away, and double overheat protection is achieved in cooperation with the fan;

[0020] The three-phase asynchronous motor with overheat protection device can filter the air through the dust net during the operation of the fan to protect the three-phase asynchronous motor body. The dust net can be filtered by manually shaking the cleaning brush, or the filter ring can be removed for cleaning.

[0021] The three-phase asynchronous motor with an overheat protection device can perform double heat dissipation to achieve overheat protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 For the utility model Figure 1 Schematic diagram of the structure after removing the dust screen;

[0025] Figure 3 It is a structural schematic diagram of another viewing angle of the utility model;

[0026] Figure 4 It is a structural schematic diagram of the three-phase asynchronous motor body of the utility model.

[0027] Description of reference numerals:

[0028] In the figure: 1-three-phase asynchronous motor body; 2-heat conduction box; 3-liquid pipe; 4-ventilation pipe; 5-connecting pipe; 6-heat conduction pipe; 7-heat conduction rod; 8-filter ring; 9-storage ring; 10-dustproof net; 11-connecting rod; 12-fan; 13-assembly plate; 14-connecting plate; 15-temperature sensor; 16-alarm; 17-bearing; 18-cleaning brush. DETAILED DESCRIPTION

[0029] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0030] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0031] The connection method can be bonding, welding, bolt connection, etc., depending on actual needs.

[0032] See also Figures 1 to 4 As shown, a three-phase asynchronous motor with an overheat protection device, this embodiment includes:

[0033] A three-phase asynchronous motor body 1; a plurality of heat-conducting boxes 2 are arranged in a ring array and can be detachably connected to the outer periphery of the three-phase asynchronous motor body 1. The side of the heat-conducting box 2 close to the three-phase asynchronous motor body 1 is constructed to be close to the arc surface of the three-phase asynchronous motor body 1 to increase the contact area. A heat-conducting liquid for overheating protection is arranged in the heat-conducting box 2. During the normal operation of the three-phase asynchronous motor body 1, the heat-conducting box 2 cooperates with the heat-conducting liquid to conduct heat and dissipate heat. Two adjacent heat-conducting boxes 2 are connected through a liquid pipe 3. The tops of the two uppermost heat-conducting boxes 2 are connected with a vent pipe 4 and a connecting pipe 5 with an electromagnetic valve. If the heat-conducting liquid is water, the opened vent pipe 4 can facilitate hot steam to take away heat and flow out. The vent pipe 4 and the connecting pipe 5 pass through the heat-conducting pipe 6 and extend to the outside of the heat-conducting pipe 6. If the heat of the three-phase asynchronous motor body 1 is too high during operation, the two connecting pipes 5 can be connected to the liquid adding device and the liquid connecting device respectively, and new heat-conducting liquid is continuously introduced into the heat-conducting box 2. During the flow, part of the three-phase asynchronous motor body 1 is taken away. The heat of the three-phase asynchronous motor body 1 is combined with the fan 12 to realize double overheat protection; the heat pipe 6 is arranged on the outer periphery of the three-phase asynchronous motor body 1, and is connected and fixed to the three-phase asynchronous motor body 1 through multiple heat-conducting rods 7. The inner wall of the heat pipe 6 is provided with two internal threads, and two filter rings 8 are threadedly connected. The inner cavity of the filter ring 8 is provided with a placement ring 9. A dustproof net 10 and multiple connecting rods 11 are connected between the placement ring 9 and the filter ring 8. The output shaft of the three-phase asynchronous motor body 1 passes through one of the placement rings 9 and the placement ring 9 near the fan 12. The inner wall is also connected to a dust-proof net 10 for filtering the air. A bearing 17 is connected to the side of the storage ring 9. The bearing 17 includes a fixed outer ring and a movable inner ring rotatably connected thereto. A cleaning brush 18 for cleaning the dust-proof net 10 is connected to the side of the movable inner ring of the bearing 17. During the operation of the fan 12, the dust-proof net 10 can filter the air to protect the three-phase asynchronous motor body 1. Manually shaking the cleaning brush 18 can filter the dust-proof net 10, or removing the filter ring 8 for cleaning.

[0034] A fan 12 for overheat protection is installed on the side of the multiple connecting rods 11 of another filter ring 8. If the temperature sensor 15 detects that the temperature exceeds the threshold, the fan 12 is started to blow air to dissipate heat, thereby achieving overheat protection.

[0035] In order to ensure stability, a mounting plate 13 is welded to the bottom end of the heat pipe 6 , and the mounting plate 13 is connected and fixed to the heat pipe 6 through a plurality of connecting plates 14 . A plurality of circular channels for bolts to pass through are provided at the top end of the mounting plate 13 .

[0036] A temperature sensor 15 and an alarm 16 are installed on the side of the three-phase asynchronous motor body 1 . The temperature sensor 15 includes a display part, a connecting wire and a measuring part. The controller is installed on the top of the assembly board 13 .

[0037] The three-phase asynchronous motor body 1, the solenoid valve, the fan 12, the temperature sensor 15 and the alarm 16 are all conventional instruments. The working principle, size and model are irrelevant to the problem solved by the present application, so no further description is given. The control mode of the present invention is controlled by a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control mode and circuit connection in detail.

[0038] How it works

[0039] The three-phase asynchronous motor with overheat protection device, during the normal operation of the three-phase asynchronous motor body 1, the heat conduction box 2 cooperates with the heat-conducting liquid to conduct heat and dissipate heat. If the temperature sensor 15 detects that the temperature exceeds the threshold, the fan 12 is started to blow air to dissipate heat to achieve overheat protection. If the heat of the three-phase asynchronous motor body 1 is too high during operation, the two connecting pipes 5 can be connected to the liquid adding device and the liquid receiving device respectively, and new heat conduction liquid is continuously introduced into the heat conduction box 2. During the flow, part of the heat of the three-phase asynchronous motor body 1 is taken away, and double overheat protection is achieved in cooperation with the fan 12. During the operation of the fan 12, the dustproof net 10 can filter the air to protect the three-phase asynchronous motor body 1. The manually shaken cleaning brush 18 can filter the dustproof net 10, or the filter ring 8 can be removed for cleaning.

[0040] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase asynchronous motor with an overheat protection device, characterized in that: include: A three-phase asynchronous motor body (1); a plurality of heat-conducting boxes (2) arranged in a ring array and detachably connected to the outer periphery of the three-phase asynchronous motor body (1); a heat-conducting liquid for overheat protection is arranged in the heat-conducting boxes (2); two adjacent heat-conducting boxes (2) are connected via a liquid-conducting pipe (3); the top ends of the two uppermost heat-conducting boxes (2) are connected via a vent pipe (4) with a solenoid valve and a connecting pipe (5); a heat-conducting pipe (6) is arranged on the outer periphery of the three-phase asynchronous motor body (1) and connected to the three-phase asynchronous motor body (1) via a plurality of heat-conducting rods (7). The asynchronous motor body (1) is connected and fixed; the inner wall of the heat conducting pipe (6) is provided with two internal threads, and two filter rings (8) are threadedly connected; the inner cavity of the filter ring (8) is provided with a storage ring (9); a dustproof net (10) and a plurality of connecting rods (11) are connected between the storage ring (9) and the filter ring (8); the output shaft of the three-phase asynchronous motor body (1) passes through one of the storage rings (9); and a fan (12) for overheat protection is installed on the side of the plurality of connecting rods (11) of the other filter ring (8).

2. A three-phase asynchronous motor with an overheat protection device according to claim 1, characterized in that: The ventilation pipe (4) and the connecting pipe (5) pass through the heat conducting pipe (6) and extend to the outside of the heat conducting pipe (6).

3. A three-phase asynchronous motor with an overheat protection device according to claim 1, characterized in that: A mounting plate (13) is welded to the bottom end of the heat conducting pipe (6), and the mounting plate (13) is connected and fixed to the heat conducting pipe (6) via a plurality of connecting plates (14).

4. A three-phase asynchronous motor with an overheat protection device according to claim 3, characterized in that: A plurality of circular channels for bolts to pass through are provided at the top end of the assembly plate (13).

5. A three-phase asynchronous motor with an overheat protection device according to claim 1, characterized in that: A temperature sensor (15) and an alarm (16) are installed on the side of the three-phase asynchronous motor body (1).

6. A three-phase asynchronous motor with an overheat protection device according to claim 1, characterized in that: The inner wall of the storage ring (9) near the fan (12) is also connected to a dustproof net (10) for filtering air, and the side surface of the storage ring (9) is connected to a bearing (17).

7. A three-phase asynchronous motor with an overheat protection device according to claim 6, characterized in that: The bearing (17) comprises a fixed outer ring and a movable inner ring rotatably connected thereto, and a cleaning brush (18) for cleaning the dustproof net (10) is connected to a side surface of the movable inner ring of the bearing (17).

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