A spiral tube water-cooled aluminum alloy sprocket motor

Abstract

The invention relates to a special motor for a motor train unit locomotive, in particular to a spiral pipe water-cooled aluminum alloy sprocket motor. The spiral pipe water-cooled aluminum alloy sprocket motor comprises a motor shell, a front end cover, a rear end cover, a motor spindle, a lead pin base, a stator, a rotor and an output sprocket. The outer circle of a front bearing is fixed to a front cover center hole of the front end cover. A front bearing section of the motor spindle is fixed to an inner hole of the front bearing. The outer circle of a rear bearing is fixed to a rear cover center blind hole of the rear end cover. A rear bearing section of the motor spindle is fixed to an inner hole of the rear bearing. A mounting foot plate is arranged below the motor shell. A reinforcing connecting rib is arranged between the mounting foot plate and the motor shell. The mounting foot plate is provided with a mounting through hole. The upper portion of the motor shell is provided with a water outlet boss and a water inlet boss. A cylinder of the motor shell is provided with an embedded spiral cooling pipe formed in a cast mode. The two ends of the spiral cooling pipe are communicated with the water outlet boss and the water inlet boss respectively. The lead pin base is located on the rear end cover, and a cable penetrates through the lead pin base. A bending resistance component is fixed to the front end cover. A needle bearing is arranged between the bending resistance component and the output sprocket.

Description

technical field [0001] The invention relates to a special electric motor for EMU locomotives, which has double strict requirements on size space and service life, and in particular relates to a spiral tube water-cooled aluminum alloy sprocket motor. Background technique [0002] High-speed EMUs have special and strict requirements on the performance of the electric motor of the traction system, such as high torque, low noise, bending moment resistance and efficient heat dissipation, etc. For this reason, most developed countries in Europe and the United States adopt various water-cooling structures for improvement. In addition, except for the direct-coupled output of the squirrel-cage motor, the motor shaft only bears pure torque. More often, it is output in the form of torque force accompanied by radial bending moment, such as sprocket and so on. In the case of the same power and speed, the diameter of the motor shaft carrying bending and torsion is more than twice the dia...

AI Technical Summary

Problems solved by technology

Therefore, in order to allow the motor shaft to withstand the bending moment, the diameter of the motor shaft has to be doubled, which eventually leads to a series of disadvantages: the linear speed of the motor bearing is also doubled, its internal friction is doubled, and the heat generated by the internal friction is doubled Big

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