Immersion jet device and method for cooling electromagnetic coil

Abstract

The invention discloses an immersion jet device and method for cooling an electromagnetic coil. The device comprises an immersion tank, a side cold plate, a jet flow bottom plate, a liquid driving system, a liquid outlet, a liquid level detector, an exhaust port, a pressure detector, a pressure balancing device, an immersion tank liquid inlet, a side cold plate liquid inlet, a liquid inlet cavity, a static pressure pump, a jet flow channel, a jet flow port, a liquid storage cylinder, a piston, a first radiator, a first temperature sensor, a second radiator, a second temperature sensor and a vacuum tank. And a vacuum pump liquid outlet, a stop valve and an electromagnetic coil. According to the electromagnetic coil cooling device provided by the invention, on one hand, the liquid driving device is used for driving the insulating cooling liquid to flow through the interior of the electromagnetic coil for internal cooling, on the other hand, the electromagnetic coil is immersed in the insulating cooling liquid, and jet cooling is carried out on the coil with the jet nozzle, so that multi-stage refrigeration of the electromagnetic coil is realized; and the refrigeration effect is greatly improved.

Description

Technical Field

[0001] The invention belongs to the field of electromagnetic coil thermal management, and in particular relates to an immersion jet device and method for cooling an electromagnetic coil. Background Art

[0002] The charges and currents in a magnetic field are affected by the Lorentz force, that is, the wire in the magnetic field will be pushed by a force when it is powered on. At the same time, when the wire is allowed to cut the magnetic lines of force in the magnetic field, current will also be generated on the wire. This is Faraday's law of electromagnetic induction. When a large current is supplied to an electromagnetic coil, a strong magnetic field will be generated, which has a large number of applications in the fields of medical treatment, industrial automatic control, etc.

[0003] A large amount of Joule heat will be generated in the process of generating a strong magnetic field. If this heat cannot be eliminated in time, the coil will accumulate heat and its resistance will increase, and the intensity of the magnetic field will continue to decrease. Therefore, a refrigeration device must be used to remove the heat from the coil. Summary of the invention

[0004] The object of the present invention is to provide an immersion jet device and method for cooling electromagnetic coils.

[0005] The technical solution for achieving the purpose of the present invention is: an immersion jet device for cooling an electromagnetic coil, comprising an immersion tank, a side cooling plate, a jet bottom plate, a liquid drive system, a liquid discharge port, a liquid level detector, an exhaust port, a pressure detector, a pressure balancing device, an immersion tank liquid inlet, a side cooling plate liquid inlet, a liquid inlet cavity, a static pressure pump, a jet channel, a jet port, a liquid storage cylinder, a piston, a first radiator, a first temperature sensor, a second radiator, a second temperature sensor, a vacuum tank, a vacuum pump liquid discharge port, a stop valve and an electromagnetic coil;

[0006] The liquid discharge port, liquid level detector, exhaust port, pressure detector, pressure balancing device, and immersion tank liquid inlet are located on the immersion tank; the side cold plate liquid inlet and liquid inlet cavity are located in the side cold plate; the static pressure pump, jet flow channel, and jet port are located in the jet bottom plate; the liquid storage cylinder, piston, first radiator, second radiator, vacuum tank, vacuum tank liquid discharge port, and stop valve are located in the liquid drive system;

[0007] The liquid storage cylinder is connected to the inlet of the first radiator, the outlet of the first radiator is connected to one end of the internal cooling pipe of the electromagnetic coil, the other end of the internal cooling pipe is connected to the inlet of the second radiator, the other end of the second radiator is connected to the stop valve, and the stop valve is connected to the inlet of the vacuum pump;

[0008] The liquid inlet of the side cold plate is connected to the liquid inlet cavity, the liquid inlet cavity is connected to the static pressure pump, the static pressure pump is connected to the jet channel, and there are 8 jet openings on the jet channel equipped with jet nozzles, which can adjust the angle to perform jet cooling on the electromagnetic coil, the first radiator and the second radiator.

[0009] A method for cooling an electromagnetic coil based on the above-mentioned immersion jet device comprises:

[0010] When the current is less than 40kA, only the liquid drive device is turned on for refrigeration; when the liquid drive device is started, the vacuum tank is first evacuated to make the vacuum tank a vacuum state, then the stop valve is opened, the piston moves downward, and the pressure difference between the vacuum tank and the liquid storage cylinder is used to make the coolant in the liquid storage cylinder flow through the first radiator, the coil internal cooling pipe, the second radiator and then enter the vacuum tank; when the vacuum tank is under positive pressure, the vacuum tank drain port is opened to discharge the coolant in the vacuum tank, and the coolant in the liquid storage cylinder is replenished at the same time;

[0011] When the current is between 40 and 80 kA, the liquid inlet of the immersion tank is opened to add coolant to the immersion tank until the electromagnetic coil is completely immersed, and the electromagnetic coil and the first radiator and the second radiator are immersed and cooled;

[0012] When the current is between 80-110 kA, open the liquid inlet of the side cold plate, the static pressure pump and the jet port, and adjust the angle of the jet port to ensure that the jet nozzle can perform jet cooling on the electromagnetic coil, the first radiator and the second radiator.

[0013] Compared with the prior art, the present invention has the following significant advantages: as an electromagnetic coil cooling device, the present invention uses a liquid driving device to drive insulating coolant to flow through the electromagnetic coil for internal cooling, and on the other hand, immerses the electromagnetic coil in insulating coolant, and simultaneously uses a jet nozzle to perform jet cooling on the coil, thereby achieving multi-stage cooling of the electromagnetic coil and greatly improving the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the submerged jet device for cooling electromagnetic coils according to the present invention.

[0015] Figure numerals: 0. electromagnetic coil, 1. immersion tank, 2. side cooling plate, 3. jet bottom plate, 4. liquid drive system, 11. drain port, 12. liquid level detector, 13. exhaust port, 14. pressure detector, 15. pressure balancing device, 16. liquid inlet of immersion tank, 21. liquid inlet of side cooling plate, 22. liquid inlet cavity, 31. static pressure pump, 32. jet channel, 33. jet port, 41. liquid storage cylinder, 411. piston, 42. first radiator, 43. second radiator, 44. vacuum tank, 441. vacuum pump drain port, 45. stop valve. DETAILED DESCRIPTION

[0016] like Figure 1As shown, the present invention proposes an immersion jet device for cooling an electromagnetic coil, which mainly includes an electromagnetic coil 0, a cooling pipe inside the coil, an immersion tank 1, a side cold plate 2, a jet bottom plate 3, a liquid drive system 4, a drain port 11, a liquid level detector 12, an exhaust port 13, a pressure detector 14, a pressure balancing device 15, an immersion tank liquid inlet 16, a side cold plate liquid inlet 21, a liquid inlet cavity 22, a static pressure pump 31, a jet channel 32, a jet port 33, a liquid storage cylinder 41, a piston 411, a first radiator 42, a second radiator 43, a vacuum tank 44, a vacuum pump drain port 441, and a stop valve 45;

[0017] Among them, the interior of the electromagnetic coil 0 is provided with a cooling channel for cooling liquid to flow through the interior of the coil for refrigeration; the drain port 11, the liquid level detector 12, the exhaust port 13, the pressure detector 14, the pressure balancing device 15, and the immersion tank inlet 16 are located on the immersion tank 1; the side cold plate inlet 21 and the liquid inlet cavity 22 are located in the side cold plate 2; the static pressure pump 31, the jet channel 32, and the jet port 33 are located in the jet bottom plate 3; the liquid storage cylinder 41, the piston 411, the first radiator 42, the second radiator 43, the vacuum tank 44, the vacuum tank drain port 441, and the stop valve 45 are located in the liquid drive system 4.

[0018] The liquid storage cylinder 41 is connected to the inlet of the first radiator 42, the outlet of the first radiator 42 is connected to one end of the internal cooling pipe of the electromagnetic coil 0, the other end of the internal cooling pipe is connected to the inlet of the second radiator 43, the other end of the second radiator 43 is connected to the stop valve 45, and the stop valve 45 is connected to the inlet of the vacuum tank 44.

[0019] The liquid inlet 21 of the side cold plate is connected to the liquid inlet cavity 22, the liquid inlet cavity 22 is connected to the static pressure pump 31, the static pressure pump 31 is connected to the jet channel 32, and there are 8 jet ports 33 on the jet channel equipped with jet nozzles, which can adjust the angle to perform jet cooling on the electromagnetic coil 0, the first radiator 42 and the second radiator 43.

[0020] Furthermore, the cooling channel inside the electromagnetic coil 0 is used for cooling liquid to flow through, and the outside of the electromagnetic coil 0 is wrapped with epoxy resin.

[0021] Furthermore, the first temperature sensor on the first radiator 42 and the second temperature sensor on the second radiator 43 are used to measure the radiator temperature, are installed in the immersion tank 1, need to be immersed when in use, and select different cooling modes according to different temperatures.

[0022] Furthermore, the insulating coolant in the immersion tank 1 and the insulating coolant in the cooling pipe inside the electromagnetic coil are Freon, liquid nitrogen or electronic fluoride liquid.

[0023] Furthermore, eight jet ports 33 are arranged at equal intervals on the jet channel 32 .

[0024] The cooling system is divided into three stages, which can cope with the cooling of electromagnetic coils with different heat flux densities.

[0025] Based on the same inventive concept, the present invention provides an electromagnetic coil cooling method, which is implemented based on the above-mentioned immersion jet device. The cooling system is divided into three stages of cooling, which can cope with the cooling of electromagnetic coils with different heat flux densities. The method includes:

[0026] When the current is less than 40kA, the temperature of the electromagnetic coil is low, and only the liquid drive device 4 can be turned on for cooling. When the liquid drive device 4 is started, the vacuum tank 44 is first evacuated to make the vacuum tank a vacuum state, and then the stop valve 45 is opened, and the piston 441 moves downward. The pressure difference between the vacuum tank 44 and the liquid storage cylinder 41 is used to make the coolant in the liquid storage cylinder flow through the first radiator 42, the coil internal cooling pipe, and the second radiator 43 and then enter the vacuum tank 44. When the vacuum tank is under positive pressure, the vacuum tank discharge port 441 is opened to discharge the coolant in the vacuum tank 44, and the coolant in the liquid storage cylinder 41 is replenished at the same time.

[0027] When the current is between 40 and 80 kA (including 40 kA), the immersion tank liquid inlet 16 is opened to add coolant to the immersion tank until the electromagnetic coil is completely immersed, and the electromagnetic coil 0 and the first radiator 42 and the second radiator 43 are immersed and cooled to improve the overall cooling capacity of the system.

[0028] When the current is between 80-110 kA (including 80 kA), open the side cold plate liquid inlet 21, the static pressure pump 31 and the jet port 33, and adjust the angle of the jet port 33 to ensure that the jet nozzle can perform jet cooling on the electromagnetic coil 0, the first radiator 42 and the second radiator 43.

[0029] The present invention uses immersion jet to realize cooling of electromagnetic coils with high heat generation, which can realize multi-stage cooling of electromagnetic coils and adopt different cooling modes for different heat flux densities. And it can give full play to the advantages of immersion cooling and jet cooling. Immersion cooling can realize complete immersion of the coils and uniform cooling, and can cool a large number of electromagnetic coils with heat generation; jet cooling can focus on cooling the high-density heat flux generated locally, further improving the heat dissipation capacity of the system, and at the same time, the jet can also disperse the bubbles generated on the surface of the coil due to high temperature, thereby improving the efficiency of immersion cooling.

Claims

1. An immersion jet device for cooling electromagnetic coils, characterized in that: It comprises an immersion tank (1), a side cooling plate (2), a jet bottom plate (3), a liquid drive system (4), a liquid discharge port (11), a liquid level detector (12), an exhaust port (13), a pressure detector (14), a pressure balancing device (15), an immersion tank liquid inlet (16), a side cooling plate liquid inlet (21), a liquid inlet cavity (22), a static pressure pump (31), a jet flow channel (32), a jet port (33), a liquid storage cylinder (41), a piston (411), a first radiator (42), a first temperature sensor, a second radiator (43), a second temperature sensor, a vacuum tank (44), a vacuum pump liquid discharge port (441), a stop valve (45) and an electromagnetic coil (0); The liquid discharge port (11), the liquid level detector (12), the exhaust port (13), the pressure detector (14), the pressure balancing device (15), and the immersion tank liquid inlet (16) are located on the immersion tank (1); the side cooling plate liquid inlet (21) and the liquid inlet cavity (22) are located in the side cooling plate (2); the static pressure pump (31), the jet flow channel (32), and the jet port (33) are located in the jet bottom plate (3); the liquid storage cylinder (41), the piston (411), the first radiator (42), the second radiator (43), the vacuum tank (44), the vacuum tank liquid discharge port (441), and the stop valve (45) are located in the liquid drive system (4); The liquid storage cylinder (41) is connected to the inlet of the first radiator (42), the outlet of the first radiator (42) is connected to one end of the internal cooling pipe of the electromagnetic coil (0), the other end of the internal cooling pipe is connected to the inlet of the second radiator (43), the other end of the second radiator (43) is connected to the stop valve (45), and the stop valve (45) is connected to the inlet of the vacuum tank (44); The side cold plate liquid inlet (21) is connected to the liquid inlet cavity (22), the liquid inlet cavity (22) is connected to the static pressure pump (31), the static pressure pump (31) is connected to the jet channel (32), and the jet channel has a plurality of jet ports (33) equipped with jet nozzles, which can adjust the angle to perform jet cooling on the electromagnetic coil (0), the first radiator (42) and the second radiator (43).

2. The immersion jet device for cooling electromagnetic coils according to claim 1, characterized in that: The cooling channel inside the electromagnetic coil (0) is used for cooling liquid to flow through, and the outside of the electromagnetic coil (0) is wrapped with epoxy resin.

3. The immersion jet device for cooling electromagnetic coils according to claim 1, characterized in that: The first temperature sensor on the first radiator (42) and the second temperature sensor on the second radiator (43) are used to measure the radiator temperature and are installed in the immersion tank (1). They need to be immersed when in use and different cooling modes are selected according to different temperatures.

4. The immersion jet device for cooling electromagnetic coils according to claim 1, characterized in that: The insulating coolant in the immersion tank (1) and the insulating coolant in the cooling pipe inside the electromagnetic coil are Freon, liquid nitrogen or electronic fluoride liquid.

5. The immersion jet device for cooling electromagnetic coils according to claim 1, characterized in that: Eight jet openings (33) are arranged at equal intervals on the jet flow channel (32).

6. A method for cooling an electromagnetic coil based on the immersion jet device according to claim 1, characterized in that: include: When the current is less than 40 kA, only the liquid drive device (4) is turned on for refrigeration; when the liquid drive device (4) is turned on, the vacuum tank (44) is first evacuated to make the vacuum tank a vacuum state, then the stop valve (45) is opened, the piston (441) moves downward, and the pressure difference between the vacuum tank (44) and the liquid storage cylinder (41) is used to make the coolant in the liquid storage cylinder flow through the first radiator (42), the coil internal cooling pipe, the second radiator (43), and then enter the vacuum tank (44); when the vacuum tank is under positive pressure, the vacuum tank discharge port (441) is opened to discharge the coolant in the vacuum tank (44), and at the same time, the coolant in the liquid storage cylinder (41) is replenished; When the current is between 40 and 80 kA, the immersion tank liquid inlet (16) is opened to add cooling liquid to the immersion tank until the electromagnetic coil is completely immersed, thereby immersing and cooling the electromagnetic coil (0) and the first radiator (42) and the second radiator (43); When the current is between 80-110 kA, the liquid inlet (21) of the side cold plate, the static pressure pump (31) and the jet port (33) are opened, and the angle of the jet port (33) is adjusted to ensure that the jet nozzle can perform jet cooling on the electromagnetic coil (0), the first radiator (42) and the second radiator (43).

7. The method according to claim 6, characterized in that The electromagnetic coil (0) has a pipe inside for cooling liquid to flow through, and the outside of the electromagnetic coil (0) is wrapped with epoxy resin.

8. The method according to claim 6, characterized in that The first temperature sensor on the first radiator (42) and the second temperature sensor on the second radiator (43) are used to measure the radiator temperature and are installed in the immersion tank (1). They need to be immersed when in use and different cooling modes are selected according to different temperatures.

9. The method according to claim 6, characterized in that The insulating coolant in the immersion tank (1) and the insulating coolant in the cooling pipe inside the electromagnetic coil are Freon, liquid nitrogen or electronic fluoride liquid.

10. The method according to claim 6, characterized in that Eight jet openings (33) are arranged at equal intervals on the jet flow channel (32).

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