Servo motor with explosion-proof function

Abstract

The utility model relates to the technical field of servo motors, in particular to a servo motor with an explosion-proof function, which comprises a shell, a working cavity arranged in the shell, a rotor rotationally arranged in the working cavity, a stator arranged on the cavity wall of the working cavity around the rotor, and a heat dissipation module arranged on the side surface of the shell, an air inlet cavity, a heat exchange cavity and an air outlet cavity are sequentially formed in the heat dissipation module, a plurality of heat exchange pipes are arranged in the heat exchange cavity, one end of each heat exchange pipe communicates with the air inlet cavity, the other end of each heat exchange pipe communicates with the air outlet cavity, and the air inlet cavity communicates with the position, close to the front end of the shell, of the working cavity through a first air pipe. The air outlet cavity communicates with the position, close to the rear end of the shell, of the working cavity through a second air pipe, a miniature fan is arranged at the position where the first air pipe communicates with the air inlet cavity, cooling airflow formed by the working cavity is internal circulation air and does not make contact with external air, the sealing performance is improved while cooling is conducted, external dust is prevented from entering the working cavity, and the service life of the working cavity is prolonged. And the explosion-proof performance of the servo motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of servo motors, in particular to a servo motor with an explosion-proof function. Background Art

[0002] In today's highly automated industrial production, servo motors, with their exceptional precision and performance, have become indispensable drive components in various control systems. However, in certain specialized operating environments, such as those with flammable and explosive gases or high concentrations of volatile dust, the operation of conventional servo motors can generate potential hazards such as sparks and high-temperature hotspots due to the operation of internal electrical components and friction between mechanical parts. These factors, when interacting with surrounding flammable and explosive materials, can easily trigger violent explosions, severely disrupting production processes and causing immeasurable losses to personnel and property.

[0003] Therefore, explosion-proof servo motors are usually used in these special operating environments. The principles of explosion-proof servo motors are mainly based on the following aspects to achieve explosion-proof functions: 1. Limiting energy release: By adopting special designs and materials, the energy such as sparks and arcs generated during motor operation is limited to a safe range, so that it is not enough to ignite the surrounding flammable and explosive substances. 2. Strengthening sealing: Seal the motor casing, including the connection between the motor shaft and the casing, cable interfaces and other parts, to prevent flammable and explosive gases or dust from entering the inside of the motor. 3. Lowering surface temperature: Optimize the heat dissipation structure and cooling system of the motor to ensure that the surface temperature of the motor during operation is lower than the ignition temperature of flammable and explosive substances.

[0004] Traditional explosion-proof servo motors, while primarily designed with improved housings and enhanced sealing, often lack sufficient heat dissipation. Due to the inevitable heat generated by electromagnetic conversion and mechanical friction during motor operation, poor heat dissipation can lead to a sharp rise in the motor's internal temperature. This not only affects the motor's operating efficiency and accuracy, but more seriously, the high temperatures can trigger electrical failures within the motor, generating sparks and even arcing. In flammable and explosive environments, these high temperatures and sparks can easily ignite surrounding combustible materials, causing explosions and posing significant threats to production and personnel safety.

[0005] Furthermore, some common heat dissipation designs, such as simple fans or natural convection, often fail to effectively dissipate heat in high-load conditions or harsh environments. Furthermore, the heat dissipation structure of traditional motors can be poorly sealed, allowing flammable and explosive substances to enter the motor through the heat dissipation channels, increasing the risk of explosion. Therefore, to meet the requirements for safe operation in flammable and explosive environments, there is an urgent need to develop a servo motor with efficient heat dissipation and excellent explosion-proof performance. Utility Model Content

[0006] The purpose of the utility model is to provide a servo motor with explosion-proof function, so as to solve the problem in the prior art that traditional explosion-proof servo motors use simple fans for heat dissipation and have poor sealing performance.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A servo motor with explosion-proof function includes a shell, a working chamber is provided in the shell, a rotor is rotatably provided in the working chamber, the front end of the rotor is placed outside the shell through the output hole at the front end of the shell, the cavity wall of the working chamber is surrounded by a stator and includes a heat dissipation module installed on the side of the shell, the heat dissipation module is sequentially provided with an air inlet chamber, a heat exchange chamber and an air outlet chamber, a plurality of heat exchange tubes are provided in the heat exchange chamber, the heat exchange chamber is filled with coolant, one end of the heat exchange tube is connected to the air inlet chamber, and the other end is connected to the air outlet chamber, the air inlet chamber is connected to the working chamber near the front end of the shell through a first air pipe, the air outlet chamber is connected to the working chamber near the rear end of the shell through a second air pipe, and a micro fan is provided at the position where the first air pipe is connected to the air inlet chamber.

[0009] A further technical solution is that it also includes a radiator, a water tank and a water pump, the water inlet of the water pump is connected to the heat exchange chamber through a first water pipe, the water outlet of the water pump is connected to the water inlet of the radiator through a second water pipe, the water outlet of the radiator is connected to the water inlet of the water tank through a third water pipe, the water outlet of the water tank is connected to the heat exchange chamber through a fourth water pipe, and a cooling fan is installed on the radiator for dissipating heat from the radiator.

[0010] A further technical solution is that the portion of the heat exchange tube placed in the heat exchange cavity is in a curved or coiled shape.

[0011] A further technical solution is that the first air pipe is connected to the working chamber through a connecting seat, a through hole connected to the working chamber is provided on the surface of the shell near the front end, an air hole connected to the side of the connecting seat is provided at the bottom of the connecting seat, the connecting seat is installed on the surface of the shell, and the through hole is aligned with the air hole at the bottom of the connecting seat; the first air pipe is connected to one end of the air hole on the side of the connecting seat.

[0012] A further technical solution is that a first sealing ring is provided around the air hole at the bottom of the connecting seat, and when the connecting seat is mounted on the surface of the shell, the first sealing ring and the surface of the shell are sealed and fitted.

[0013] A further technical solution is that a sealing block is installed at the position of the output hole in the working chamber, and a first rotating hole is provided on the sealing block, which passes through the front and rear ends. The first rotating hole is aligned with the output hole, and the rotor is placed in the first rotating hole. A second sealing ring and a first bearing are provided around the hole wall of the first rotating hole. The outer wall of the second sealing ring is connected to the hole wall of the first rotating hole, and the inner wall is rotatably fitted with the outer wall of the rotor. The outer ring of the first bearing is connected to the hole wall of the first rotating hole, and the inner ring is connected to the outer wall of the rotor.

[0014] A further technical solution is that a support plate is provided in the working chamber near the rear end of the shell, and a second rotating hole is provided on the support plate that passes through the front and rear sides. A second bearing is provided in the second rotating hole, and the outer ring of the second bearing is connected to the inner wall of the second rotating hole, and the inner ring is connected to the outer wall of the rear end of the rotor.

[0015] Compared with the prior art, the present invention has at least one of the following beneficial effects: 1. Through the micro fan, the air in the working chamber can be driven from the first air pipe into the air inlet chamber, and then into the heat exchange chamber through the air inlet chamber. In the heat exchange chamber, heat exchange is performed with the coolant in the heat exchange chamber through the heat exchange pipe, thereby reducing the temperature of the air passing through and forming low-temperature air. The low-temperature air enters the working chamber from the air outlet chamber and the second air pipe, and can absorb the temperature of the rotor and stator, thereby cooling the rotor and stator; 2. The first air pipe and the second air pipe are respectively connected to the front and rear ends of the working chamber, and a reasonable heat dissipation duct can be formed in the working chamber, so that the low-temperature air can gradually absorb the temperature from the rear side of the working chamber and move toward the front side of the working chamber; 3. The cooling airflow formed in the working chamber of the present invention is internal circulating air, which does not contact with the external air. In this way, while cooling, it can also improve the sealing of the entire servo motor, prevent external dust from entering the working chamber, and improve the explosion-proof performance of the servo motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall schematic diagram of a servo motor with explosion-proof function according to the present utility model.

[0017] Figure 2 The utility model is a cross-sectional schematic diagram of a servo motor with explosion-proof function.

[0018] Figure 3 for Figure 2 The enlarged schematic diagram of the part marked A in the middle.

[0019] Icon: 1-housing, 2-working chamber, 3-rotor, 4-output hole, 5-stator, 6-heat dissipation module, 7-air inlet chamber, 8-heat exchange chamber, 9-air outlet chamber, 10-heat exchange tube, 11-first air pipe, 12-second air pipe, 13-micro fan, 14-radiator, 15-water tank, 16-water pump, 17-first water pipe, 18-second water pipe, 19-third water pipe, 20-fourth water pipe, 21-cooling fan, 22-connecting seat, 23-through hole, 24-sealing block, 25-first rotating hole, 26-second sealing ring, 27-first bearing, 28-support plate, 29-second rotating hole, 30-second bearing. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] Figures 1 to 3 Shown is an embodiment of the present utility model.

[0022] Example:

[0023] A servo motor with explosion-proof function includes a shell 1, a working chamber 2 is provided in the shell 1, a rotor 3 is rotatably provided in the working chamber 2, the front end of the rotor 3 is placed outside the shell 1 through the output hole 4 at the front end of the shell 1, and the cavity wall of the working chamber 2 is surrounded by a stator 5. It also includes a heat dissipation module 6 installed on the side of the shell 1, and the heat dissipation module 6 is sequentially provided with an air inlet chamber 7, a heat exchange chamber 8 and an air outlet chamber 9. A plurality of heat exchange tubes 10 are provided in the heat exchange chamber 8, and the heat exchange chamber 8 is filled with coolant. One end of the heat exchange tube 10 is connected to the air inlet chamber 7, and the other end is connected to the air outlet chamber 9. The air inlet chamber 7 is connected to the working chamber 2 near the front end of the shell 1 through a first air pipe 11, and the air outlet chamber 9 is connected to the working chamber 2 near the rear end of the shell 1 through a second air pipe 12. A micro fan 13 is provided at the position where the first air pipe 11 is connected to the air inlet chamber 7. The micro fan 13 can drive the air in the working chamber 2 from the first air pipe 11 into the air inlet chamber 7, and then into the heat exchange chamber 8 through the air inlet chamber 7. In the heat exchange chamber 8, the heat exchange pipe 10 exchanges heat with the coolant in the heat exchange chamber 8, thereby reducing the temperature of the air passing through, forming low-temperature air. The low-temperature air enters the working chamber 2 from the air outlet chamber 9 and the second air pipe 12, and can absorb the temperature of the rotor 3 and the stator 5, thereby cooling the rotor 3 and the stator 5. The first air pipe 11 and the second air pipe 12 are respectively connected to the front and rear ends of the working chamber 2, and can form a reasonable heat dissipation duct in the working chamber 2, so that the low-temperature air can gradually absorb the temperature from the back side of the working chamber 2 and move toward the front side of the working chamber 2. The cooling airflow formed in the working chamber 2 of the utility model is internal circulating air and does not come into contact with the outside air. In this way, while cooling, it can also improve the sealing of the entire servo motor, prevent external dust from entering the working chamber 2, and improve the explosion-proof performance of the servo motor.

[0024] The radiator 14 also includes a water tank 15 and a water pump 16. The water inlet of the water pump 16 is connected to the heat exchange chamber 8 through a first water pipe 17, the water outlet of the water pump 16 is connected to the water inlet of the radiator 14 through a second water pipe 18, the water outlet of the radiator 14 is connected to the water inlet of the water tank 15 through a third water pipe 19, and the water outlet of the water tank 15 is connected to the heat exchange chamber 8 through a fourth water pipe 20. A cooling fan 21 is installed on the radiator 14 for dissipating heat from the radiator 14. Since the air in the working chamber 2 continuously exchanges heat with the coolant in the heat exchange chamber 8, the temperature of the coolant in the heat exchange chamber 8 will gradually rise. Therefore, in order to reduce the temperature of the coolant in the heat exchange chamber 8, the coolant in the heat exchange chamber 8 is cooled by the water pump 16, the water tank 15 and the radiator 14. The water pump 16 pumps the coolant from the heat exchange chamber 8 into the radiator 14, where it passes through the heat dissipation fins and is cooled by the cooling fan 21. The cooled coolant then flows into the water tank 15, where the low-temperature coolant in the water tank 15 flows into the heat exchange chamber 8. The water tank 15 can be flat to utilize its large surface area for auxiliary cooling.

[0025] The portion of the heat exchange tube 10 disposed in the heat exchange chamber 8 is curved or coiled, so that air can hit the surface of the heat exchange tube 10 as much as possible during circulation, thereby performing heat exchange.

[0026] The first air pipe 11 is connected to the working chamber 2 via a connecting seat 22. A through hole 23 connected to the working chamber 2 is provided on the surface of the housing 1 near the front end. An air hole connected to the side of the connecting seat 22 is provided at the bottom of the connecting seat 22. The connecting seat 22 is mounted on the surface of the housing 1, and the through hole 23 is aligned with the air hole at the bottom of the connecting seat 22. The first air pipe 11 is connected to one end of the air hole located on the side of the connecting seat 22. The provision of the mounting seat facilitates the fixing of the first air pipe 11. The mounting seat can be firmly fixed to the surface of the housing 1 using screws or adhesives, serving as the connection point between the first air pipe 11 and the through hole 23, thereby reducing the risk of leakage at the connection between the first air pipe 11 and the through hole 23.

[0027] A first sealing ring is provided around the air hole at the bottom of the connection base 22. When the connection base 22 is mounted on the surface of the housing 1, the first sealing ring is in sealing contact with the surface of the housing 1. By providing the first sealing ring, the through hole 23 and the air hole are sealed to prevent air leakage.

[0028] A sealing block 24 is installed in the working chamber at the position of the output hole 4. The sealing block 24 is provided with a first rotating hole 25 that runs through the front and rear ends. The first rotating hole 25 is aligned with the output hole 4. The rotor 3 is placed in the first rotating hole 25. A second sealing ring 26 and a first bearing 27 are provided around the hole wall of the first rotating hole 25. The outer wall of the second sealing ring 26 is connected to the hole wall of the first rotating hole 25, and the inner wall is rotatably fitted with the outer wall of the rotor 3. The outer ring of the first bearing 27 is connected to the hole wall of the first rotating hole 25, and the inner ring is connected to the outer wall of the rotor 3. By providing the sealing block 24, the output hole 4 can be sealed, improving the sealing performance of the entire housing 1. The first bearing 27 can improve the smoothness of the rotation of the rotor 3. The second sealing ring 26 can provide sealing during the rotation of the rotor 3. Multiple second sealing rings 26 can be provided to enhance the sealing effect.

[0029] A support plate 28 is provided near the rear end of the housing 1 in the working chamber. A second rotation hole 29 is provided on the support plate 28, extending through the front and rear ends. A second bearing 30 is disposed within the second rotation hole 29. The outer ring of the second bearing 30 is connected to the inner wall of the second rotation hole 29, while the inner ring is connected to the outer wall of the rear end of the rotor 3. The support plate 28 and the second bearing 30 provide support for the rear end of the rotor 3 and enhance smooth rotation.

[0030] Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and implementations may be devised by those skilled in the art that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, the drawings, and the claims, various variations and modifications may be made to the components and / or layout of the subject combination arrangement. In addition to variations and modifications to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A servo motor with explosion-proof function, comprising a housing (1), a working chamber (2) provided in the housing (1), a rotor (3) rotatably provided in the working chamber (2), a front end of the rotor (3) being placed outside the housing (1) through an output hole (4) at the front end of the housing (1), a stator (5) being provided around the rotor (3) on the wall of the working chamber (2), and characterized in that: The heat dissipation device further comprises a heat dissipation module (6) mounted on the side of the housing (1), wherein an air inlet cavity (7), a heat exchange cavity (8) and an air outlet cavity (9) are sequentially arranged in the heat dissipation module (6), wherein a plurality of heat exchange tubes (10) are arranged in the heat exchange cavity (8), wherein the heat exchange cavity (8) is filled with a coolant, wherein one end of the heat exchange tube (10) is connected to the air inlet cavity (7), and the other end is connected to the air outlet cavity (9), wherein the air inlet cavity (7) is connected to a position of the working cavity (2) near the front end of the housing (1) through a first air pipe (11), and the air outlet cavity (9) is connected to a position of the working cavity (2) near the rear end of the housing (1) through a second air pipe (12), and a micro fan (13) is arranged at a position where the first air pipe (11) is connected to the air inlet cavity (7).

2. The explosion-proof servo motor according to claim 1, characterized in that: The invention also includes a radiator (14), a water tank (15) and a water pump (16), wherein the water inlet of the water pump (16) is connected to the heat exchange chamber (8) through a first water pipe (17), the water outlet of the water pump (16) is connected to the water inlet of the radiator (14) through a second water pipe (18), the water outlet of the radiator (14) is connected to the water inlet of the water tank (15) through a third water pipe (19), the water outlet of the water tank (15) is connected to the heat exchange chamber (8) through a fourth water pipe (20), and a cooling fan (21) is installed on the radiator (14) for dissipating heat from the radiator (14).

3. The explosion-proof servo motor according to claim 2, characterized in that: The portion of the heat exchange tube (10) placed in the heat exchange cavity (8) is in a curved or coiled shape.

4. The explosion-proof servo motor according to claim 1, characterized in that: The first air pipe (11) is connected to the working chamber (2) through the connecting seat (22); a through hole (23) connected to the working chamber (2) is provided on the surface of the housing (1) near the front end; an air hole connected to the side of the connecting seat (22) is provided at the bottom of the connecting seat (22); the connecting seat (22) is mounted on the surface of the housing (1), and the through hole (23) is aligned with the air hole at the bottom of the connecting seat (22); the first air pipe (11) is connected to one end of the air hole located on the side of the connecting seat (22).

5. The explosion-proof servo motor according to claim 4, characterized in that: A first sealing ring is provided at the bottom of the connecting seat (22) surrounding the air hole. When the connecting seat (22) is mounted on the surface of the housing (1), the first sealing ring and the surface of the housing (1) are sealed and fitted.

6. The explosion-proof servo motor according to claim 1, characterized in that: The working chamber is provided with a sealing block (24) at the position of the output hole (4). The sealing block (24) is provided with a first rotating hole (25) passing through the front and rear ends. The first rotating hole (25) is aligned with the output hole (4). The rotor (3) is placed in the first rotating hole (25). A second sealing ring (26) and a first bearing (27) are provided around the hole wall of the first rotating hole (25). The outer wall of the second sealing ring (26) is connected to the hole wall of the first rotating hole (25), and the inner wall is rotatably fitted with the outer wall of the rotor (3). The outer ring of the first bearing (27) is connected to the hole wall of the first rotating hole (25), and the inner ring is connected to the outer wall of the rotor (3).

7. The explosion-proof servo motor according to claim 1, characterized in that: The working chamber is provided with a support plate (28) at a position close to the rear end of the housing (1); the support plate (28) is provided with a second rotation hole (29) penetrating the front and rear sides; a second bearing (30) is provided in the second rotation hole (29); the outer ring of the second bearing (30) is connected to the inner wall of the second rotation hole (29), and the inner ring is connected to the outer wall of the rear end of the rotor (3).

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