Liquid-cooled permanent magnet governor

Abstract

The invention provides a liquid-cooling type permanent magnet speed controller. The speed controller comprises an outer rotor connected with a first shaft, and an inner rotor connected with a second shaft, wherein a conductor disk and a permanent magnet disk that are positioned in opposite are arranged between the outer rotor and the inner rotor; an air gap is formed between the conductor disk and the permanent magnet disk; the speed controller also comprises a machine shell, and a coolant liquid inlet and an oil return opening formed in the machine shell; a ring-shaped cover body is fixedly arranged on the back surface, opposite to the permanent magnet disk, of the conductor disk; an inner cavity is formed in the conductor disk; multiple oil inlets formed in the inner side of the cover body, and multiple oil outlets formed in the outer side of the cover body are formed in the back surface of the conductor disk; the oil inlets and the oil outlets are communicated through the inner cavity; the coolant liquid inlet is communicated to the inner side of the cover body on the conductor disk through a coolant liquid input pipe; and the oil outlets are communicated to the oil return opening through a coolant liquid output pipe. According to the liquid-cooling type permanent magnet speed controller, the coolant liquid enters the core heating region of the permanent magnet speed controller in a jetting manner, so that the radiating efficiency of the permanent magnet speed controller is greatly improved, and the noise generated in operation of equipment is lowered greatly.

Description

technical field [0001] The invention relates to a speed regulating device, in particular to a liquid-cooled permanent magnet speed governor. Background technique [0002] The permanent magnet speed governor is a device that adds a speed regulating mechanism to the permanent magnet coupler to realize speed regulation and energy saving. It is mainly used for speed regulation of high-power high-voltage asynchronous motors. At present, the permanent magnet governor mainly includes a permanent magnet rotor, a conductor rotor and a speed regulating mechanism. The speed regulating mechanism is mainly used to adjust the relative position between the permanent magnet rotor and the conductor rotor in the axial direction, so as to change the The effective part of the rotor coupling, thereby changing the torque transmitted between the two, and finally changing the torque of the output shaft of the permanent magnet governor. Due to the advantages of smooth stepless speed regulation, hig...

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Problems solved by technology

[0004] 1. The eddy current generated by magnetic induction on the conductor rotor generates a huge amount of heat. When the rated power of the equipment is increased, the effect of relying on the existing fin-like heat sink to force air cooling and heat dissipation is limited, and the magnetic coupler is easily burned due to high temperature. ;

[0005] 2. The noise problem generated by the finned heat sink during the operation of the magnetic coupler is very serious;

[0006] 3. The air gap adjustment unit located in the permanent magnet rotor has complex structure, high manufacturing cost and difficult assembly;

[0007] 4. For the cam mechanism in the speed-regulating inner and outer sleeves used to form the push-pull mechanism, since the cam roller adopts a sliding contact slider in contact with the groove surface, once the lubrication of the grease is lost, it is very easy to make the slider in the groove. The slot is stuck, resulting in the inability to adjust the speed; at the same time, it cannot accurately control the axial displacement of the speed regulating mechanism, which cannot reach the required air gap size, and the speed regulation accuracy is difficult to be guaranteed

[0008] The existence of the above-mentioned main defects affects the operation stability of the entire permanent magnet governor, which not only limits the application of the permanent magnet governor in some high-power requirements occasions, but also limits the widespread application of the permanent magnet governor

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