Electromagnetic coil cooling device and method for control rod drive mechanism
A technology of electromagnetic coil and driving mechanism, which is applied in the direction of cooling/ventilation/heating transformation, etc., and can solve the problems of affecting the driving mechanism and shortening the life of the coil
Active Publication Date: 2016-05-04
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology
At present, the cooling method used by the electromagnetic coil is static oil cooling. The coil sleeve is filled with α fireproof oil, and the heat generated when the coil is energized is transmitted by the α fireproof oil. The α fireproof oil is in a static state in the coil sleeve, and the heat Relying entirely on natural conduction, it reaches an equilibrium temperature of about 100°C after stable operation. Long-term operation at this temperature will shorten the life of the coil and affect the stiffness of the drive mechanism system
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Embodiment Construction
[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0024] like figure 1 As shown, an electromagnetic coil cooling device of a control rod drive mechanism, the device includes an oil-cooled coil assembly, a heat exchanger connected to one end of the oil-cooled coil assembly, and a magnetic pump connected to the heat exchanger, and the other end of the magnetic pump Connect with the other end of the oil cooling coil assembly to form an oil cooling circuit.
[0025] In this embodiment, there are 3 coil assemblies, and each coil assembly is composed of 2 sets of coils. This design can increase the surface area of the coils in contact with the cooling oil and improve the cooling capacity. The main cooling pipeline is connected with the coil by bellows, and the bellows can move up and down with the coil.
[0026] In this embodiment, the oil cooling circuit mainly includes an oil cooling coil asse...
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The invention relates to a cooling device and method for a solenoid coil of a control rod drive mechanism and belongs to the field of nuclear reactor control rods. A solenoid coil of an existing control rod drive mechanism of an experiment reactor completely adopts the static cooling mode that heat is completely and naturally conducted, the equilibrium temperature is too high, the service life of the coil can be shortened if operation is performed for a long time, and the system rigidity of the drive mechanism is affected. The device comprises an oil-cooling coil assembly, a heat exchanger and a magnetic drive pump, wherein the heat exchanger is connected with one end of the oil-cooling coil assembly, and the magnetic drive pump is connected with the heat exchanger. The other end of the magnetic drive pump is connected with the other end of the oil-cooling coil assembly, and an oil-cooling loop is formed. Heat generated by the solenoid coil is taken away from the coil through alpha fireproof oil dynamic circulation, hot alpha fireproof oil is cooled through the heat exchanger, and the cooled alpha fireproof oil is pumped into the solenoid coil through the magnetic drive pump. The heat generated by working of the solenoid coil can be rapidly and efficiently taken away from coil sleeve cooling coils, the service life of the solenoid coil is effectively prolonged, and the system rigidity of the drive mechanism is guaranteed.
Description
technical field [0001] The invention belongs to the field of nuclear reactor control rods, and in particular relates to an electromagnetic coil cooling device and method of a control rod driving mechanism. Background technique [0002] Control rods are movable parts of thermal neutron absorbing material used to control reactivity. By adjusting the depth of its insertion into the core, start-up, shutdown and power adjustment can be implemented simply and quickly. [0003] The control rod drive mechanism is one of the important safety components of the experimental reactor, which drives the control rod assembly to move up and down in the core or maintain it at a certain height. There are several forms such as reluctance motor drive mechanism, magnetic lifting drive mechanism and hydraulic transmission mechanism, all of which have the characteristics of full sealing, fast and reliable rod drop. After the electromagnetic coil in the control rod driving mechanism is energized, ...
Claims
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IPC IPC(8): H05K7/20
Inventor 朱学微甄建霄
Owner CHINA INSTITUTE OF ATOMIC ENERGY