A three-phase asynchronous motor for high-temperature environments

Abstract

This utility model relates to a three-phase asynchronous motor for high-temperature environments, applicable to the field of electric motors. It includes a motor body, with a mounting plate fixedly connected to the upper end of the motor body. Two mounting shells are provided on the upper end of the mounting plate, and a lower mounting shell is fixedly connected to the mounting plate. A terminal block is fixedly connected to the inner bottom wall of the lower mounting shell, and multiple terminal heads are installed on the upper end of the terminal block. A pressure plate is fixedly connected to one end of each of the two mounting shells. Multiple outlet holes, corresponding to the multiple terminal heads, are chiseled at the front end of the pressure plate. A sealing strip is fitted onto the outer surfaces of the two pressure plates and the two mounting shells. A limit groove is chiseled at the end of the sealing strip near the mounting shell, and a limit strip is provided within the limit groove. This dual heat dissipation function significantly reduces the operating temperature of the junction box, avoiding long-term high-temperature operation, thereby reducing the risk of damage to internal components and effectively improving the stability and reliability of the motor operation.

Description

Technical Field

[0001] This utility model relates to an electric motor, and more particularly to a three-phase asynchronous electric motor for use in high-temperature environments. Background Technology

[0002] Three-phase asynchronous motors are a type of induction motor that are powered by three-phase AC current connected to the same source (380V). Because the rotor and stator rotating magnetic fields of a three-phase asynchronous motor rotate in the same direction but at different speeds, there is slip, hence the name three-phase asynchronous motor.

[0003] Due to different working environments, some electric motors operate in high-temperature environments. Generally, cooling structures are used to cool down internal components such as the rotor, thereby improving the motor's adaptability to high-temperature environments. For example, Chinese Patent Publication No. CN217984746U discloses a motor for use in high-temperature environments. This utility model has a U-shaped water flow channel inside the rotating shaft and a water inlet assembly at one end of the water flow channel. During operation, water from the transition water tank is drawn in from one end of the U-shaped water flow channel through the water inlet assembly and discharged back into the transition water tank from the other end of the U-shaped water flow channel. The water re-entering the transition water tank mixes with the water entering the transition water tank through the water inlet, ensuring that the water temperature in the transition water tank does not rise too much, thus achieving the purpose of cooling the rotor inside the motor.

[0004] Some motor cooling systems typically focus on dissipating heat from the motor's internal structure (such as core components like the stator and rotor), but often neglect temperature management at the junction box area where the motor connects to the cable. This results in the junction box operating in a high-temperature environment for extended periods, which can easily lead to heat buildup, thermal aging of the connectors, and other malfunctions. These factors can increase the junction box failure rate and, consequently, severely affect the normal operation and reliability of the motor. Utility Model Content

[0005] The technical problem that this utility model aims to solve in view of the above-mentioned prior art is that existing motor cooling systems often neglect temperature management of the junction box area, causing the junction box to be in a high-temperature environment for a long time, which makes its internal structure prone to damage and affects the normal operation of the motor.

[0006] To address the aforementioned problems, this utility model provides a three-phase asynchronous motor for high-temperature environments, comprising a motor body, a mounting plate fixedly connected to the upper end of the motor body, two mounting shells on the upper end of the mounting plate, a lower mounting shell fixedly connected to the mounting plate, and a wiring block fixedly connected to the inner bottom wall of the lower mounting shell, with multiple terminals mounted on the upper end of the wiring block, and pressure plates fixedly connected to corresponding ends of the two mounting shells, with multiple outlet holes corresponding to the multiple terminals cut at the front end of the pressure plates, and sealing strips fitted together on the outer surfaces of the two pressure plates and the two mounting shells, with a limiting groove cut at the end of the sealing strip near the mounting shell, a limiting strip provided in the limiting groove, and the limiting strip fixedly connected to the adjacent pressure plate, a receiving shell fixedly fitted outside the mounting shell, a cooling channel fixedly connected between the receiving shell and the mounting shell, a liquid pipe fixedly connected outside the receiving shell, and a drain pipe fixedly connected between the two receiving shells.

[0007] In the aforementioned three-phase asynchronous motors used in high-temperature environments, the cables are orderly isolated through multiple outlet holes on the pressure plate, ensuring neat cable arrangement inside the mounting housing and effectively improving heat dissipation space. At the same time, the externally designed cooling channels actively dissipate heat from the mounting housing through heat exchange, indirectly reducing the temperature at the wiring points inside the housing. This dual heat dissipation function significantly reduces the operating temperature of the junction box, avoiding long-term high-temperature operation and thus reducing the risk of damage to internal components. Consequently, it effectively improves the stability and reliability of motor operation.

[0008] As a further supplement to this application, the inner bottom wall of the lower mounting shell is fixedly connected to two positioning tubes, which are located on the rear side of the wiring block. The inner top wall of the upper mounting shell is fixedly connected to a heat insulation block, and two screws are provided on the upper part of the upper mounting shell. The lower end of the screws is threaded through the adjacent mounting shell, heat insulation block and positioning tube in sequence.

[0009] As a further supplement to this application, the longitudinal section of both the limiting groove and the limiting strip is T-shaped, and the sealing strip is made of flexible material.

[0010] As a further supplement to this application, the corresponding ends of the two housing shells are in contact with the adjacent pressure plate, the cooling channel is spiral, the drain pipe is located at the rear end of the mounting shell, and the drain pipe is a telescopic pipe.

[0011] As a further addition to this application, the upper liquid pipe is located above the adjacent cooling channel, and the lower liquid pipe is located below the adjacent cooling channel.

[0012] As a further supplement to this application, the two pressure plates are fitted together, and the two outlet holes form a complete circular hole. The front ends of the two pressure plates are provided with multiple baffles that correspond to multiple connectors respectively. The rear ends of the baffles are fixedly connected to two piston heads, and the rear ends of the piston heads can move through the adjacent pressure plates.

[0013] As a further supplement to this application, the baffle completely covers the two adjacent outlet holes, and the rear end of the baffle is in contact with the pressure plate, while the front end of the baffle is fixedly connected to a pull rod.

[0014] In summary, in practical applications, after installing the cables and connectors, they should be placed in the adjacent outlet holes in an orderly manner according to their arrangement. This ensures that the cables inside the mounting housing are neatly arranged, effectively improving heat dissipation space. After sealing and positioning the two mounting housings with sealing strips and screws, coolant is drained from the lower liquid pipe into the lower cooling channel to dissipate heat inside the lower mounting housing. Then, the coolant is drained from the lower cooling channel into the upper cooling channel through the drain pipe, and then discharged through the upper liquid pipe. This active heat dissipation of the mounting housing through heat exchange indirectly reduces the temperature at the wiring points inside the housing, significantly lowering the operating temperature inside the junction box. This effectively prevents the junction box from operating in a high-temperature environment for extended periods, reducing the risk of damage to internal components and thus effectively improving the stability and reliability of motor operation. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the first embodiment of this application; Figure 2 This is a schematic diagram of the mounting shell structure according to the first embodiment of this application; Figure 3 This is a cross-sectional view of the mounting shell structure according to the first embodiment of this application; Figure 4 This is a schematic diagram of the pressure plate structure according to the first embodiment of this application; Figure 5 This is a schematic diagram of the sealing strip structure according to the first embodiment of this application; Figure 6 This is a schematic diagram of the cooling channel structure according to the first embodiment of this application; Figure 7 This is a schematic diagram of the baffle structure according to the second embodiment of this application.

[0016] Explanation of the labels in the diagram: 1-Motor body, 2-Mounting plate, 3-Mounting shell, 4-Terminal block, 5-Pressure plate, 6-Outlet hole, 7-Sealing strip, 8-Limiting groove, 9-Limiting strip, 10-Accommodation shell, 11-Cooling channel, 12-Liquid pipe, 13-Drain pipe, 14-Positioning pipe, 15-Heat insulation block, 16-Screw, 17-Baffle, 18-Piston head. Detailed Implementation

[0017] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0018] First implementation method: Figures 1-4 The following is illustrated: A three-phase asynchronous motor for high-temperature environments includes a motor body 1. A mounting plate 2 is fixedly connected to the upper end of the motor body 1, providing a rigid mounting platform. Two mounting shells 3 are provided on the upper end of the mounting plate 2. The lower mounting shell 3 is fixedly connected to the mounting plate 2, facilitating the fixing of a terminal block 4. The upper mounting shell 3 is removable for maintenance. A terminal block 4 is fixedly connected to the inner bottom wall of the lower mounting shell 3. Multiple terminals are installed on the upper end of the terminal block 4 for easy connection to cables. A pressure plate 5 is fixedly connected to one end of each of the two mounting shells 3. The front end of the pressure plate 5 is open... Multiple outlet holes 6 are drilled, each corresponding to a multiple connector. Two pressure plates 5 are fitted together, and the two outlet holes 6 form a complete circular hole, which can match the outer diameter of the cable, thereby effectively preventing the intrusion of high-temperature gas or dust. Two positioning tubes 14 are fixedly connected to the inner bottom wall of the lower mounting shell 3. The positioning tubes 14 are located on the rear side of the connector block 4. A heat insulation block 15 is fixedly connected to the inner top wall of the upper mounting shell 3. Two screws 16 are provided on the upper part of the upper mounting shell 3. The lower end of the screws 16 is threaded through the adjacent mounting shell 3, the heat insulation block 15 and the positioning tubes 14 in sequence. The screws 16 can limit and fix the upper and lower mounting shells 3.

[0019] Figure 4 and Figure 5 As shown: The outer surfaces of the two pressure plates 5 and the two mounting shells 3 are covered with sealing strips 7. A limiting groove 8 is chiseled at the end of the sealing strip 7 near the mounting shell 3. A limiting strip 9 is provided in the limiting groove 8. The limiting strip 9 is fixedly connected to the adjacent pressure plate 5. The longitudinal section of the limiting groove 8 and the limiting strip 9 are both T-shaped. The sealing strip 7 is made of flexible material. The sealing strip 7 can seal the place where the two pressure plates 5 and the two mounting shells 3 are in contact, thereby effectively preventing external dust and impurities from penetrating into the interior of the mounting shell 3 through the gap. The sealing strip 7 made of flexible material can deform according to the shape of the pressure plate 5 and the mounting shell 3, thereby improving the sealing effect.

[0020] Figure 2 , Figure 3 and Figure 6The diagram shows that a housing 10 is fixedly fitted onto the outer side of the mounting housing 3. A cooling channel 11 is fixedly connected between the housing 10 and the mounting housing 3. A liquid pipe 12 is fixedly connected to the outer side of the housing 10. A drain pipe 13 is fixedly connected between the two housings 10. One end of each housing 10 is in contact with an adjacent pressure plate 5. The cooling channel 11 is spiral-shaped. The drain pipe 13 is located at the rear end of the mounting housing 3 and is a telescopic pipe. The upper liquid pipe 12 is located above the adjacent cooling channel 11, and the lower liquid pipe 12 is located below the adjacent cooling channel 11. Coolant is discharged from the lower liquid pipe 12 into the lower cooling channel 11 to dissipate heat inside the lower mounting housing 3. Then, the coolant is discharged from the lower cooling channel 11 into the upper cooling channel 11 through the drain pipe 13, and then discharged through the upper liquid pipe 12. This active heat dissipation of the mounting housing 3 through heat exchange indirectly reduces the temperature of the wiring points inside the housing, thereby significantly reducing the operating temperature inside the junction box.

[0021] When the motor body 1 is in use, the cables and terminals can be pre-installed and placed in the adjacent outlet holes 6 in an orderly manner according to the cable arrangement order. This makes the cables inside the mounting housing 3 neatly arranged, effectively improving the heat dissipation space. After the two mounting housings 3 are sealed and positioned by the sealing strip 7 and the screw 16, the coolant is drained from the lower liquid pipe 12 into the lower cooling channel 11 to dissipate heat inside the lower mounting housing 3. Then, the coolant is drained from the lower cooling channel 11 into the upper cooling channel 11 through the drain pipe 13, and then discharged through the upper liquid pipe 12. This active heat dissipation of the mounting housing 3 through heat exchange indirectly reduces the temperature of the wiring points inside the housing, thereby significantly reducing the working temperature inside the junction box. This effectively avoids the junction box being in a high-temperature operating environment for a long time, thereby reducing the risk of damage to internal components and effectively improving the stability and reliability of the motor body 1.

[0022] Second implementation method: This embodiment adds a baffle 17 and a piston head 18 to the first embodiment, while the rest remains the same as the first embodiment.

[0023] Figure 7 As shown: The front ends of the two pressure plates 5 are provided with multiple baffles 17, each corresponding to a multiple terminal block. The rear ends of the baffles 17 are fixedly connected to two piston heads 18. The rear ends of the piston heads 18 can move through the adjacent pressure plates 5. The baffles 17 completely cover the two adjacent outlet holes 6, and the rear ends of the baffles 17 are in contact with the pressure plates 5. By blocking the outlet holes 6 through the baffles 17, external dust and impurities are effectively prevented from entering the interior of the mounting housing 3. The front ends of the baffles 17 are fixedly connected to a pull rod, which facilitates the installation and removal of the baffles 17.

[0024] When the motor body 1 is not in use, its internal cables may not be fully connected. In this case, the outlet hole 6 can be blocked by the baffle 17 to effectively prevent external dust and impurities from entering the mounting shell 3, thereby effectively improving the cleanliness of the mounting shell 3 and preventing a large amount of dust and impurities from affecting it after the cables are connected.

[0025] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A three-phase asynchronous motor for high temperature environments comprising a motor body (1), characterized in that: The upper end of the motor body (1) is fixedly connected with a mounting plate (2), the upper end of the mounting plate (2) is provided with two mounting shells (3), the lower mounting shell (3) is fixedly connected with the mounting plate (2), the inner bottom wall of the lower mounting shell (3) is fixedly connected with a wiring block (4), a plurality of terminal blocks are mounted on the upper end of the wiring block (4), one end of the two mounting shells (3) is fixedly connected with a pressing plate (5), a plurality of wire outlet holes (6) corresponding to the plurality of terminal blocks are formed in the front end of the pressing plate (5), the outer surfaces of the two pressing plates (5) and the two mounting shells (3) are jointly sleeved with a sealing strip (7), the end of the sealing strip (7) close to the mounting shell (3) is provided with a limiting groove (8), a limiting strip (9) is arranged in the limiting groove (8), the limiting strip (9) is fixedly connected with the adjacent pressing plate (5), the mounting shell (3) is fixedly sleeved with a containing shell (10), the containing shell (10) and the mounting shell (3) are fixedly connected with a cooling channel (11), the containing shell (10) is fixedly connected with a liquid pipe (12), the two containing shells (10) are fixedly connected with a liquid discharge pipe (13).

2. A three-phase induction motor for high temperature environments as claimed in claim 1, wherein: The inner bottom wall of the lower mounting shell (3) is fixedly connected with two positioning pipes (14), the positioning pipes (14) are located at the rear side of the wiring block (4), the inner top wall of the upper mounting shell (3) is fixedly connected with a heat insulation block (15), and the upper end of the upper mounting shell (3) is provided with two screw rods (16), the lower ends of the screw rods (16) are threaded through the adjacent mounting shell (3), the heat insulation block (15) and the positioning pipe (14) in sequence.

3. A three-phase induction motor for high temperature environments as claimed in claim 1, wherein: The longitudinal section of the limiting groove (8) and the limiting strip (9) is T-shaped, and the sealing strip (7) is made of flexible material.

4. A three-phase induction motor for high temperature environments as claimed in claim 1, wherein: The corresponding ends of the two containing shells (10) are in contact with the adjacent pressing plates (5), the cooling channel (11) is spiral-shaped, the liquid discharge pipe (13) is located at the rear end of the mounting shell (3), and the liquid discharge pipe (13) is a telescopic pipe.

5. A three-phase asynchronous motor for high temperature environments according to claim 4, characterized in that: The upper liquid pipe (12) is located above the adjacent cooling channel (11), and the lower liquid pipe (12) is located below the adjacent cooling channel (11).

6. A three-phase induction motor for high temperature environments as claimed in claim 1, wherein: The two pressing plates (5) are in contact, the two wire outlet holes (6) form a complete circular hole, the front ends of the two pressing plates (5) are provided with a plurality of baffle plates (17) corresponding to the plurality of terminal blocks, the rear ends of the baffle plates (17) are fixedly connected with two piston heads (18), and the rear ends of the piston heads (18) are movably threaded through the adjacent pressing plates (5).

7. A three-phase asynchronous motor for high temperature environments according to claim 6, characterized in that: The baffle plate (17) completely covers the adjacent two wire outlet holes (6), and the rear end of the baffle plate (17) is in contact with the pressing plate (5), and the front end of the baffle plate (17) is fixedly connected with a pull rod.

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