CN116317355A - A cooling system for a servo motor and its application method - Google Patents

Abstract

The invention provides a servo motor heat dissipation system in the field of servo motor heat dissipation and its use method. Through the annular heat exchange cavity installed inside the casing and filled with heat transfer oil, the heat inside the motor is quickly transferred to the heat dissipation fins of the outer casing. At the same time, the fan impeller and the guide ring are used to make the air flow and the heat dissipation fins contact and exchange heat efficiently, and the heat is quickly taken away from the vicinity of the casing. The combination of the two improves the heat exchange efficiency. The heat exchange chamber is divided into an inner annular chamber and an outer annular chamber connected at the ends, and an impeller barrel arranged in the annular heat exchange chamber. By monitoring the internal temperature of the servo motor, the impeller barrel is started in good time, so that the heat transfer oil can be realized in the annular heat exchange chamber. The internal and external circulation accelerates the internal flow of the heat transfer oil and accelerates the heat transfer speed. Through the pumping cylinder, the internal and external circulation of the heat transfer oil as well as the up and down circulation are realized, further increasing the overall heat transfer speed of the heat transfer oil.

Description

A cooling system for a servo motor and its application method

technical field

The invention relates to the field of servo motor heat dissipation, in particular to a servo motor heat dissipation system and a use method thereof.

Background technique

The servo motor can control the speed, the position accuracy is very accurate, and the voltage signal can be converted into torque and speed to drive the controlled object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an actuator, and has the characteristics of small electromechanical time constant and high linearity. It can convert the received electrical signal into the motor shaft. The angular displacement or angular velocity output; for the heat dissipation of the servo motor, you can choose natural air cooling, forced air cooling, liquid circulation and other methods.

Conventional servo motor heat dissipation systems mostly use a single heat dissipation method, but each single heat dissipation method has its own advantages and disadvantages. The air-cooled heat dissipation system has a simple structure but the heat transfer efficiency within the motor is not high. shell surface.

The present application provides a heat dissipation system for a servo motor and a method for using the same. The heat dissipation system is composed of a combination of air cooling and liquid cooling.

Contents of the invention

The purpose of this application is to solve the shortcomings of the single heat dissipation system of the traditional servo motor. Compared with the prior art, it provides a servo motor heat dissipation system and its use method, which can realize liquid cooling and improve the efficiency of internal heat transfer to the outside, and air cooling is fast. Heat away from the vicinity of the case.

A heat dissipation system for a servo motor, comprising a housing, a stator is installed inside the housing, and a rotor is rotatably connected to the inner side of the stator; the inner wall of the housing is provided with an annular heat exchange chamber that abuts against the outer wall of the stator and is filled with heat-conducting oil, and the outer wall of the housing is fixed It is connected with cooling fins that are distributed in a circle and extend into the annular heat exchange chamber. The left part of the cooling fins is covered with a guide ring that is fixedly connected with the outer wall of the housing; The left side of the partition is provided with a fan impeller that is socketed and fixed with the rotor, the outer wall of the housing located on the left side of the guide ring is provided with an air inlet hole, and the outer wall of the housing located on the right side of the guide ring is provided with a flow guide hole. Air outlet holes connected to the inner cavity of the ring;

The annular heat exchange chamber is nested with a split ring that divides it into an inner annular chamber and an outer annular chamber. The left end of the split ring is provided with a flow groove connecting the inner annular chamber and the outer annular chamber, and the right side of the split ring is provided with a communication groove that communicates with the inner annular chamber. and the circulation hole of the outer annular cavity; the inner annular cavity is nested with an impeller tube, the right end of the impeller tube is sleeved with a gear ring, the gear ring is meshed with a driving gear, and the driving gear is fixedly connected with the first transmission extending to the outside of the annular heat exchange cavity. shaft, the first transmission shaft is connected to the output shaft of the electromagnetic clutch through the first transmission gear set, the input shaft of the electromagnetic clutch is connected to the second transmission shaft, and the second transmission shaft is connected to the rotor through the second transmission gear set;

A temperature sensor is installed in the stator, and the temperature sensor is electrically connected with an external servo controller through a wire.

Further, the servo motor heat dissipation system also includes a circulation mechanism, the circulation mechanism includes a liquid pumping cylinder installed under the housing, the liquid pumping tube communicates with the lower cavity of the annular heat exchange chamber through the liquid pumping tube, and the liquid pumping tube communicates with the lower cavity of the annular heat exchange chamber through the liquid injection tube. The upper cavity of the annular heat exchange chamber is connected; the pumping tube is nested with a piston, the piston extends to the outside of the pumping tube and is fixedly connected with a clamping frame, the clamping frame is clamped with an eccentric groove plate, and the eccentric groove plate is fixedly connected with an extension To the vertical shaft in the housing, the vertical shaft is connected to the first transmission shaft through the third transmission gear set.

Preferably, the heat dissipation fins are S-shaped heat dissipation fins, the heat dissipation fins extend into the outer annular cavity and abut against the outer end surface of the split ring, and the heat dissipation fins divide the outer annular cavity into multiple groups of S-shaped circulation channels distributed around the circumference. aisle.

Preferably, the section of the guide ring is horizontally L-shaped, and the guide ring is welded and fixed to the outer wall of the casing.

Preferably, the right end of the split ring is fixedly connected to the inner wall of the annular heat exchange chamber, and the inner side of the split ring is provided with a baffle integrally formed with it and abuts and slides with the impeller barrel, and the gear ring and the driving gear are installed on the right side of the baffle.

Preferably, the impeller cylinder is a cylinder with openings at both ends, and blades distributed equidistantly are fixedly connected to the left end thereof.

Preferably, the flow holes are set between the blades and the baffle, and the flow holes distributed equidistantly around the circumference are set on the split ring; the flow groove is an annular gap formed between the split ring and the left inner wall of the annular heat exchange chamber.

Preferably, the connection between the liquid suction pipe and the annular heat exchange chamber is provided with a first one-way valve that prevents the heat transfer oil from flowing back into the annular heat exchange chamber from the liquid suction pipe, and the connection between the liquid injection pipe and the annular heat exchange chamber is provided to prevent the heat transfer oil from flowing back into the annular heat exchange chamber. The second one-way valve of the return flow injection pipe of the annular heat exchange chamber.

Preferably, the liquid pumping cylinder is a horizontal cylinder and is provided with a dividing plate inside to separate it into two independent cavities, the liquid suction tube and the liquid injection tube are both connected to the left cavity, and the piston is nested in the left cavity .

A method for using a servo motor heat dissipation system, comprising the following steps: Step 1, turn on the power supply of the servo motor, start the servo motor and a temperature sensor through a servo controller, and perform air cooling and liquid cooling for heat dissipation; Step 2, the temperature sensor The temperature inside the servo motor is monitored in real time and the temperature is sent back to the servo controller; step 3, the servo controller compares the returned temperature data with the set threshold, and when the returned temperature data is greater than the threshold, the electromagnetic clutch is activated , so that the heat transfer oil circulates inside and outside the annular heat exchange chamber; at the same time, the pumping cylinder makes the heat transfer oil circulate up and down.

Compared with the prior art, the present invention has the advantages of:

(1) The present invention quickly transfers the internal heat of the motor to the heat dissipation fins of the outer casing through the annular heat exchange chamber installed inside the casing and filled with heat transfer oil, and at the same time uses the fan impeller and guide ring to make the air flow and heat dissipation The fins are in contact with heat exchange efficiently, and the heat is quickly taken away from the vicinity of the casing. The combination of the two improves the heat exchange efficiency. Cavity and the impeller barrel set in the annular heat exchange chamber, by monitoring the internal temperature of the servo motor, the impeller barrel is activated in time, so that the heat transfer oil can realize internal and external circulation in the annular heat exchange chamber, accelerate the internal flow of the heat transfer oil, and accelerate the heat exchange efficiency.

(2) The present invention is provided with S-shaped cooling fins extending from the annular heat exchange chamber to the outside of the housing, which increases the contact area between the cooling fins and the external airflow under the condition of horizontal length, and at the same time, the S-shaped cooling fins The outer annular cavity is divided into a plurality of S-shaped channels for the flow of the heat transfer oil distributed around the circumference, so as to increase the contact area between the heat transfer oil and the heat dissipation fins, and further improve the heat transfer effect of the heat dissipation fins.

(3) The present invention realizes the up-and-down circulation flow of the heat-conducting oil in the annular heat-exchanging chamber through the pumping cylinder installed at the lower part of the casing and communicated with the upper and lower parts of the annular heat-exchanging chamber, so that the heat-conducting oil not only circulates internally and externally but also circulates up and down circulation, further improving the overall heat transfer efficiency of the heat transfer oil.

(4) The use method of the servo motor heat dissipation system disclosed in the present invention monitors the internal temperature of the motor in real time through a temperature sensor. Internal and external circulation and up and down circulation, automatically adjust the heat dissipation method according to the heat production state.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is the sectional structure schematic diagram of the present invention;

Fig. 3 is the schematic diagram of the enlarged structure of place A in Fig. 2;

Fig. 4 is the sectional structure schematic diagram of housing in the present invention;

Fig. 5 is a schematic diagram of the three-dimensional structure of heat dissipation fins in the present invention;

Fig. 6 is a schematic diagram of the three-dimensional structure of the guide ring in the present invention;

FIG. 7 is a schematic diagram of an enlarged structure at B in FIG. 2;

Fig. 8 is a schematic diagram of the three-dimensional structure of the split ring in the present invention;

Fig. 9 is a schematic diagram of the three-dimensional structure of the impeller barrel in the present invention;

Fig. 10 is a schematic longitudinal sectional structure diagram of the present invention.

Explanation of symbols in the figure: 1. Shell; 101. Annular heat exchange chamber; 102. Air inlet; 103. Air outlet; 2. Rotor; 3. Stator; 4. Radiating fin; 5. Baffle; 6. Fan Impeller; 7, guide ring; 8, split ring; 801, baffle plate; 802, flow hole; 803, flow groove; 9, impeller barrel; 901, blade; 10, gear ring; 11, driving gear; 1. transmission shaft; 13. first transmission gear set; 14. electromagnetic clutch; 15. second transmission shaft; 16. second transmission gear set; 17. pumping cylinder; 18. pumping pipe; 19. liquid injection pipe; 20. Piston; 21. Clamping frame; 22. Eccentric grooved disc; 23. Vertical shaft; 24. Third transmission gear set; 25. Temperature sensor; 26. Servo controller.

Detailed ways

The embodiments will clearly and completely describe the technical solutions of the present application in conjunction with the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to this application. The scope of the application for protection.

Example 1:

The present invention provides a cooling system for servo motors, please refer to Figures 1-7, including a housing 1, a stator 3 is installed in the housing 1, and a rotor 2 is connected to the inner side of the stator 3; The outer wall is in contact with the annular heat exchange chamber 101 filled with heat-conducting oil. The outer wall of the housing 1 is fixedly connected with heat dissipation fins 4 that are distributed in a circle and extend into the annular heat exchange chamber 101. The left part of the heat dissipation fin 4 is sheathed There is a deflector ring 7 fixedly connected to the outer wall of the housing 1; the inner part of the housing 1 located on the left side of the stator 3 is fixedly connected with a partition 5, and the left side of the partition 5 is provided with a fan impeller 6 which is socketed and fixed with the rotor 2. The outer wall of the body 1 located on the left side of the guide ring 7 is provided with an air inlet 102, and the outer wall of the housing 1 located on the right side of the guide ring 7 is provided with an air outlet 103 communicating with the inner cavity of the guide ring 7;

The annular heat exchange chamber 101 is nested with a split ring 8 that divides it into an inner annular chamber and an outer annular chamber. The left end of the split ring 8 is provided with a circulation groove 803 connecting the inner annular chamber and the outer annular chamber, and the right side of the split ring 8 is provided with a There is a flow hole 802 connecting the inner annular cavity and the outer annular cavity; the inner annular cavity is nested with an impeller cylinder 9, the right end of the impeller cylinder 9 is sleeved with a gear ring 10, and the gear ring 10 is meshed with a driving gear 11, and the driving gear 11 is fixedly connected There is a first transmission shaft 12 extending to the outside of the annular heat exchange chamber 101, the first transmission shaft 12 is connected to the output shaft of the electromagnetic clutch 14 through the first transmission gear set 13, and the input shaft of the electromagnetic clutch 14 is connected to the second transmission shaft 15 , the second transmission shaft 15 is connected to the rotor 2 for transmission through the second transmission gear set 16;

A temperature sensor 25 is installed inside the stator 3, and the temperature sensor 25 is electrically connected to an external servo controller 26 through wires.

Specifically, the heat transfer oil in the annular heat exchange chamber 101 absorbs the heat in the housing 1, and the heat of the heat transfer oil is transferred to the cooling fins 4 for heat dissipation. At the same time, the rotor 2 drives the fan impeller 6 to rotate when it rotates, and The air flow is injected into the guide ring 7 through the air inlet hole 102 and the air outlet hole 103, and the air flow is ejected horizontally in the guide ring 7, and the heat is quickly taken away by the heat dissipation fin 4, and the combination of air cooling and liquid cooling Quickly take the heat away from the housing 1, overcoming the problems of low heat dissipation efficiency of single air cooling and easy accumulation of heat near the motor by single liquid cooling;

At the same time, the temperature of the stator 3 and rotor 2 is detected by the temperature sensor 25 and the temperature information is sent back to the servo controller 26. When the temperature exceeds the set threshold, the electromagnetic clutch 14 is activated, and the rotor 2 passes through the second transmission gear set 16. Drive the second transmission shaft 15 to rotate, the second transmission shaft 15 drives the first transmission shaft 12 to rotate through the electromagnetic clutch 14 and the first transmission gear set 13, the first transmission shaft 12 drives the impeller cylinder 9 to rotate through the drive gear 11, the impeller cylinder 9 The heat transfer oil is promoted to circulate in the inner annular cavity and the outer annular cavity, and the contact speed between the heat transfer oil and the cooling fins 4 is accelerated, the heat exchange effect is improved, and the heat dissipation speed of the stator 3 and the rotor 2 is accelerated.

In this embodiment, the heat dissipation fins 4 are S-shaped heat dissipation fins, and the heat dissipation fins 4 extend into the outer annular cavity and abut against the outer end surface of the split ring 8, and the heat dissipation fins 4 divide the outer annular cavity into circumferentially distributed Multiple sets of S-shaped circulation channels.

Specifically, when the heat transfer oil flows in the outer annular cavity, it has a larger contact area and longer contact time with the heat dissipation fins 4, so that the heat transfer oil and the heat dissipation fins 4 can exchange heat more fully, so that The heat dissipation fins 4 have a larger contact area with the air, which improves the heat dissipation speed.

In this embodiment, the section of the guide ring 7 is horizontally L-shaped, and the guide ring 7 is welded and fixed to the outer wall of the casing 1 .

Specifically, the airflow entering the guide ring 7 becomes a horizontal airflow under the action of the inner cavity of the guide ring 7, which facilitates the uniform contact between the airflow and the heat dissipation fins 4 distributed in a circle, and improves the exchange rate between the airflow and the heat dissipation fins 4. heat effect.

In this embodiment, the right end of the split ring 8 is fixedly connected to the inner wall of the annular heat exchange chamber 101, and the inner side of the split ring 8 is provided with a baffle 801 integrally formed with it and abuts and slides with the impeller barrel 9, the gear ring 10 and the driving gear 11 are both Installed on the right side of the baffle 801.

Specifically, avoid contact of the heat transfer oil with the gear ring 10 and the driving gear 11 .

In this embodiment, the impeller cylinder 9 is a cylinder with openings at both ends, and blades 901 equidistantly distributed are fixedly connected to its left end.

Specifically, when the impeller cylinder 9 rotates, its blades 901 drive the heat transfer oil to circulate between the inner annular cavity and the outer annular cavity.

In this embodiment, the circulation holes 802 are provided between the blades 901 and the baffle plate 801, and the circulation holes 802 distributed equidistantly around the circumference are provided on the split ring 8; The annular gap formed between the side inner walls.

Specifically, it is convenient for the heat transfer oil to circulate between the inner annular cavity and the outer annular cavity driven by the blade 901 .

Example 2:

The present invention provides a servo motor heat dissipation system, please refer to Fig. 2 and Fig. 7-10, the difference between this embodiment and Embodiment 1 is: the servo motor heat dissipation system also includes a circulation mechanism, and the circulation mechanism includes a The liquid pumping tube 17 is connected with the lower cavity of the annular heat exchange chamber 101 through the liquid pumping tube 18, and the liquid pumping tube 17 is communicated with the upper cavity of the annular heat exchange cavity 101 through the liquid injection tube 19; the liquid pumping tube 17 A piston 20 is nested inside, the piston 20 extends to the outside of the pumping cylinder 17 and is fixedly connected with a clamping frame 21, the clamping frame 21 is clamped with an eccentric groove plate 22, and the eccentric groove plate 22 is fixedly connected with a frame extending into the housing 1 The vertical shaft 23 is connected to the first transmission shaft 12 through the third transmission gear set 24 for transmission.

Specifically, while the heat transfer fluid circulates inside and outside the inner annular chamber and the outer annular chamber, the pumping cylinder 17 intermittently pumps the heat transfer oil from the lower part of the annular heat exchange chamber 101 to the upper part of the annular heat exchange chamber 101, so that the annular heat exchange chamber 101 The heat transfer oil in the heat chamber 101 not only circulates internally and externally, but also realizes the intermittent circulation of the heat transfer oil, thereby improving the circulation effect of the heat transfer oil, making the heat distribution more uniform, and improving the overall heat absorption effect of the heat transfer oil.

In this embodiment, the connection between the pumping pipe 18 and the annular heat exchange chamber 101 is provided with a first one-way valve to prevent the heat transfer oil from flowing back into the annular heat exchange chamber 101 from the liquid suction pipe 18, and the liquid injection pipe 19 and the annular heat exchange chamber The connection point 101 is provided with a second one-way valve to prevent the heat transfer oil from flowing back into the liquid injection pipe 19 from the annular heat exchange chamber 101 .

Specifically, ensure that the heat transfer oil flows in one direction from bottom to top.

In this embodiment, the pumping cylinder 17 is a horizontal cylinder and is provided with a dividing plate inside which divides it into two independent cavities. The pumping tube 18 and the liquid injection tube 19 are both connected to the cavity on the left side, and the piston 20 Nests in left cavity.

Specifically, it is convenient to install the clamping frame 21 and the eccentric groove plate 22 .

A method for using a servo motor heat dissipation system, the method for using the servo motor heat dissipation system as described above includes the following steps: step 1, turn on the power supply of the servo motor, start the servo motor and the temperature sensor 25 through the servo controller 26, and perform air cooling Cooperate with liquid cooling to dissipate heat; step 2, the temperature sensor 25 monitors the temperature inside the servo motor in real time and sends the temperature back to the servo controller 26; step 3, the servo controller 26 compares the returned temperature data with the set threshold For comparison, when the returned temperature data is greater than the threshold value, the electromagnetic clutch 14 is activated to make the heat transfer oil circulate inside and outside the annular heat exchange chamber 101; at the same time, the pumping cylinder 17 makes the heat transfer oil circulate up and down.

Specifically, the heat output of the servo motor is detected by the temperature sensor 25, and when the heat output exceeds a predetermined threshold, internal and external circulation and up-and-down circulation of the heat transfer oil are performed, so that the combination of air cooling and liquid cooling has a better heat dissipation effect.

The above description is only a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto.

Claims (10)

1. The servo motor heat dissipation system is characterized by comprising a shell (1), wherein a stator (3) is arranged in the shell (1), and a rotor (2) is rotationally connected to the inner side of the stator (3); an annular heat exchange cavity (101) which is abutted with the outer wall of the stator (3) and filled with heat conducting oil is formed in the inner wall of the shell (1), radiating fins (4) which are circumferentially distributed and extend into the annular heat exchange cavity (101) are fixedly connected to the outer wall of the shell (1), and a guide ring (7) fixedly connected with the outer wall of the shell (1) is sleeved on the left part of each radiating fin (4); the inner part of the shell (1) positioned at the left side of the stator (3) is fixedly connected with a baffle plate (5), the left side of the baffle plate (5) is provided with a fan impeller (6) which is sleeved and fixed with the rotor (2), the outer wall of the shell (1) positioned at the left side of the guide ring (7) is provided with an air inlet hole (102), and the outer wall of the shell (1) positioned at the right side of the guide ring (7) is provided with an air outlet hole (103) communicated with the inner cavity of the guide ring (7);

a dividing ring (8) for dividing the annular heat exchange cavity (101) into an inner annular cavity and an outer annular cavity is nested in the annular heat exchange cavity (101), a circulation groove (803) for communicating the inner annular cavity and the outer annular cavity is formed in the left end of the dividing ring (8), and a circulation hole (802) for communicating the inner annular cavity and the outer annular cavity is formed in the right side of the dividing ring (8); an impeller cylinder (9) is nested in the inner annular cavity, the right end of the impeller cylinder (9) is sleeved with a gear ring (10), the gear ring (10) is meshed with a driving gear (11), the driving gear (11) is fixedly connected with a first transmission shaft (12) extending to the outer side of the annular heat exchange cavity (101), the first transmission shaft (12) is connected with an output shaft of an electromagnetic clutch (14) through a first transmission gear set (13), an input shaft of the electromagnetic clutch (14) is connected with a second transmission shaft (15), and the second transmission shaft (15) is connected with a rotor (2) through a second transmission gear set (16) for transmission;

a temperature sensor (25) is arranged in the stator (3), and the temperature sensor (25) is electrically connected with an external servo controller (26) through a wire.

2. A heat dissipation system for a servo motor according to claim 1, further comprising a circulation mechanism, wherein the circulation mechanism comprises a liquid suction cylinder (17) arranged below the shell (1), the liquid suction cylinder (17) is communicated with the lower cavity of the annular heat exchange cavity (101) through a liquid suction pipe (18), and the liquid suction cylinder (17) is communicated with the upper cavity of the annular heat exchange cavity (101) through a liquid injection pipe (19); the liquid suction barrel (17) is internally nested with a piston (20), the piston (20) extends to the outer side of the liquid suction barrel (17) and is fixedly connected with a clamping frame (21), the clamping frame (21) is clamped with an eccentric groove disc (22), the eccentric groove disc (22) is fixedly connected with a vertical shaft (23) extending into the shell (1), and the vertical shaft (23) is connected with the first transmission shaft (12) through a third transmission gear set (24) for transmission.

3. A servo motor heat radiation system according to claim 1, characterized in that the heat radiation fins (4) are S-shaped heat radiation fins, the heat radiation fins (4) extend into the outer annular cavity and are abutted with the outer end surface of the dividing ring (8), and the heat radiation fins (4) divide the outer annular cavity into a plurality of groups of circulating channels which are distributed in a circumferential manner and are S-shaped.

4. The servo motor heat dissipation system according to claim 1, wherein the cross section of the guide ring (7) is in a horizontal L shape, and the guide ring (7) is welded and fixed with the outer wall of the shell (1).

5. The servo motor heat dissipation system according to claim 1, wherein the right end of the dividing ring (8) is fixedly connected with the inner wall of the annular heat exchange cavity (101), a baffle plate (801) which is integrally formed with the dividing ring (8) and is in abutting sliding connection with the impeller cylinder (9) is arranged on the inner side of the dividing ring, and the gear ring (10) and the driving gear (11) are both arranged on the right side of the baffle plate (801).

6. A servo motor heat dissipation system according to claim 5, characterized in that the impeller cylinder (9) is a cylinder with openings at both ends and the left end is fixedly connected with equally distributed blades (901).

7. The servo motor heat dissipation system as recited in claim 6, wherein the flow holes (802) are formed between the blades (901) and the baffle plates (801), and the dividing ring (8) is provided with flow holes (802) distributed at equal intervals along the circumference; the circulation groove (803) is an annular gap formed between the dividing ring (8) and the left inner wall of the annular heat exchange cavity (101).

8. The servo motor heat dissipation system according to claim 2, wherein a first one-way valve for preventing heat conduction oil from flowing back from the liquid suction pipe (18) to the annular heat exchange cavity (101) is arranged at a position where the liquid suction pipe (18) is communicated with the annular heat exchange cavity (101), and a second one-way valve for preventing heat conduction oil from flowing back from the annular heat exchange cavity (101) to the liquid injection pipe (19) is arranged at a position where the liquid injection pipe (19) is communicated with the annular heat exchange cavity (101).

9. A servo motor heat dissipation system according to claim 2, characterized in that the liquid suction cylinder (17) is a horizontal cylinder and is internally provided with a dividing plate dividing the liquid suction cylinder into two independent cavities, the liquid suction pipe (18) and the liquid injection pipe (19) are communicated with the left cavity, and the piston (20) is nested in the left cavity.

10. The method of using a heat dissipation system for a servo motor according to claim 2, comprising the steps of: step one, switching on a power supply of a servo motor, starting the servo motor and a temperature sensor (25) through a servo controller (26), and carrying out air cooling and liquid cooling in a matched mode; step two, the temperature sensor (25) monitors the temperature inside the servo motor in real time and returns the temperature to the servo controller (26); step three, the servo controller (26) compares the returned temperature data with a set threshold value, and when the returned temperature data is larger than the threshold value, the electromagnetic clutch (14) is started, so that the heat conduction oil circulates inside and outside the annular heat exchange cavity (101); simultaneously, the liquid suction cylinder (17) enables the heat conduction oil to circulate up and down.

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