Evaporative cooling system of hybrid motor stator

Abstract

The invention discloses an evaporative cooling system of a hybrid motor stator. A stator sealing space comprises a stator housing (1), an insulated sleeve (3) and an end cover (2), wherein a hollow pipeline (7), an end part spraying system, a stator evaporation space and a condenser (16) which are arranged in a stator core (6) or the straight line section of a stator winding (8), and an external forced circulation system form an evaporative cooling loop. Heat produced by the straight line section of the stator winding (8) is transferred to an evaporative cooling medium inside the hollow pipeline (7). A plurality of nozzles (10) are arranged around the end part of the stator winding (8), and the evaporative cooling medium is directly sprayed on the end part of the stator winding (8) after atomized by the nozzles (10) for absorbing the heat produced on the end part. A liquid part subjected to heat exchange in the evaporative cooling medium on two parts flows into the stator sealing space, the vaporized evaporative cooling medium raises to enter the condenser (16), and is condensed by the condenser (16) to become liquid, and the liquid flows back to the stator sealing space.

Description

technical field [0001] The invention relates to a motor stator evaporative cooling system Background technique [0002] With the increase of motor capacity, the calorific value increases, and the heat dissipation capacity of the motor directly affects the performance and life of the motor, which puts forward higher requirements for the cooling system of the motor. Evaporative cooling technology uses the principle of evaporative cooling medium to vaporize and absorb heat to cool the motor. Compared with traditional cooling methods, it has unique advantages. The evaporative cooling technology uses the latent heat of vaporization to absorb heat, with high cooling efficiency and uniform and comprehensive cooling effect. It uses high insulation, suitable boiling point, non-flammable, non-explosive, safe, stable, non-toxic and environmentally friendly evaporative cooling medium, which ensures the safe and stable operation of the motor. [0003] At present, there are two convent...

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Problems solved by technology

However, there are two main disadvantages of this cooling method: on the one hand, the use of the full immersion structure requires a relatively large amount of evaporative cooling medium, especially the space occupied by the end heating parts is small, but a lot of evaporative cooling medium needs to be wasted. to fill

At present, the price of the new environment-friendly evaporative cooling medium is relatively high, and the cost of the stator adopting the full immersion structure is limited by the high evaporative cooling medium, which seriously affects the economy of the motor; on the other hand, the internal sealing of the stator adopting the full immersion The space is filled with evaporative cooling medium, which puts forward higher requirements on the rigidity of the isolation sleeve and the reliability of the sealing structure, especially in order to maintain sufficient rigidity, the isolation sleeve needs to have a certain radial thickness. The increase increases the difficulty of the motor design and increases the cost of the motor

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