A ventilation structure and method for distributing internal and external cooling medium flow according to loss ratio
A technology of cooling medium and external ventilation, applied in the direction of casing/cover/support, electrical components, electromechanical devices, etc., can solve the problems of unreasonable air circulation distribution, lack of cooling effect, etc., to enhance heat exchange capacity, The effect of reducing the radial temperature difference and enhancing the heat dissipation capacity
Inactive Publication Date: 2018-05-29
HARBIN UNIV OF SCI & TECH
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem that the internal components of the motor cannot get the proper cooling effect due to the unreasonable distribution of air circulation in the common motor ventilation structure, and provide an exchange ventilation structure that matches the stator and rotor loss and the cooling effect of the medium. method, a reasonable ventilation mode can indirectly improve the operating performance and power density of the motor, and improve the service life of each component
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[0027] The present invention will be further described below in conjunction with the embodiments and with reference to the accompanying drawings.
[0028] See figure 1 . figure 1 It is a schematic diagram of the structure of the internal and external air duct baffles of the original motor. The present invention will figure 1 The common internal and external air duct baffles shown are based on the characteristics of the casing ventilation ditch and combined with the distribution of the internal and external air ducts to optimize the structure. figure 2 The structure shown is placed on both ends of the ventilation channel formed by the stator in the casing. For the external ventilation duct, the transmission end enters the air and the non-transmission end exits. Most motors have external ventilation channels on the casing that are used to cool the stator part. This solution allocates half of the outer ventilation channel to the internal fluid, which can optimize the cooling...
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The invention discloses a ventilating structure and a method for distributing flow of internal and external cooling medium based on loss ratio. A novel flowing path for a motor internal cooling medium is designed. The problem of relatively high temperature rise distribution difference of a stator and a rotor caused by unbalanced air ventilation distribution of the original ventilating structure is solved by the ventilating structure provided by the invention; the duty cycle of the internal and external ventilating ducts can be determined according to the ratio of the stator loss in the total loss; on the basis of a common ventilating baffle structure, a baffle is improved; a part of the original external ventilating duct is adopted as the flowing path for the internal cooling medium; the ventilating ducts filled by different cooling mediums are distributed at intervals, so that the internal air can be cooled by the external air; the matching between the baffle and a machine case along the width is adjusted only according to the stator and rotor loss ratio, and the effective heat exchange between a primary circuit and a secondary circuit is realized; balanced cooling effect distribution for the stator part and the rotor part can be realized as well; and therefore, the overall temperature rise distribution condition of the motor is perfected.
Description
technical field [0001] The invention relates to a ventilation structure and method for a motor, in particular to an exchange ventilation structure and method for a motor, and belongs to the technical field of motors. Background technique [0002] The heat transfer inside the motor is a process that is difficult to control. With the increasing requirements for the motor capacity, the increase in unit loss will lead to an increase in temperature. If the temperature rise is too high, it will greatly affect the reliability and life of each component. influences. [0003] Since the ratio of the stator and rotor losses to the total loss of different types of motors is different, the flow of each part of the cooling medium should be reasonably allocated according to the proportion of loss and heat generation. [0004] There is a certain temperature difference between the stator part and the rotor part. Since the temperature is transferred from high temperature to low temperature, ...
Claims
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IPC IPC(8): H02K5/20
CPCH02K5/20H02K2205/09
Inventor 丁树业李珊珊陈景易
Owner HARBIN UNIV OF SCI & TECH