Air-cooled permanent-magnet coupler and method for cooling the same

Abstract

The invention discloses an air-cooled permanent-magnet coupler and a method for cooling the same. On the basis of the gas film technique, an isolation gas film is formed between a copper conductor and a permanent-magnet rotor in an air-cooled permanent-magnet coupler. Therefore, while the copper conductor and the permanent-magnet rotor are cooled, heat transferring between the copper conductor and the permanent-magnet rotor is isolated, so that the cooling efficiency and degree are increased and thus reliable operation of the permanent-magnet coupler can be guaranteed.

Description

technical field [0001] The invention relates to permanent magnet drive technology in the industrial field, in particular to an air-cooled permanent magnet coupler and a method for cooling the air-cooled permanent magnet coupler. Background technique [0002] Permanent magnet drive technology is a breakthrough new technology developed internationally in recent years. It is an applicable technology for speed regulation and energy saving of fans and pump centrifugal loads. It has the characteristics of high efficiency and energy saving, high reliability, no rigid connection to transmit torque, can be applied in harsh environments, greatly reduces the overall system vibration, reduces system maintenance and prolongs the service life of the system. In particular, its excellent speed regulation characteristics of no high-order harmonics and no heating of the motor at low speeds make it the first choice for energy-saving technical transformation of fans and pumps. [0003] The per...

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Problems solved by technology

[0005] At present, different types of permanent magnetic couplers adopt different cooling methods. The air-cooled permanent magnetic coupler has a simple structure, and the main heat dissipation depends on the installation of aluminum heat dissipation fins on the outside of the guide disk, and relies on the rotational speed to form eddy currents. The heat is brought out, and the purpose of heat exchange and cooling can be achieved by forming a temperature difference in the surrounding air, so that the permanent magnetic coupler can operate reliably; the structure of the water-cooled permanent magnetic coupler is relatively complicated, and there are certain requirements for water quality. The waterway design involved It is complex and requires circulation system, cooling system, external water cooling system control system and feedback system, etc. There are many fault points, and it is necessary to increase the pipes and nozzles and use water as the cooling medium to take away the heat from the guide disk so that the permanent magnetic coupler can operate reliably. ; The structure of the oil-cooled permanent magnetic coupler is complex, and the oil occupies a large area, including the cooling system and the feedback system, etc., and the oil quality needs to be measured, and the environment is poor. and reuse the hot oil after cooling to achieve reliable operation of the permanent magnetic coupling

[0006] It can be seen that for high-power permanent magnet couplers, that is, water-cooled permanent magnet couplers or oil-cooled permanent magnet couplers with power above 400kw, the cooling is complicated and the efficiency and degree of cooling are not high, which will affect the performance of water-cooled permanent magnets. Reliable operation of couplings or oil-cooled permanent magnetic couplings

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