Totally-enclosed self-ventilation traction motor for low-loss and low-noise 100% floor vehicle

Abstract

The invention relates to a totally-enclosed self-ventilation traction motor for a low-floor vehicle. The motor comprises a base, a stator assembly, a rotor assembly, transmission end covers and non-transmission end covers which are respectevly installed at two sides of the base. Irregular counter bores and large air holes are formed in the outer edge of the periphery of a stator punching sheet inthe stator assembly. A stator pressing ring air channel communicating with the irregular counter bores and large air holes is formed in the position, close to the edge of the stator pressing ring, ofthe stator pressing ring, an air inlet communicating with the stator pressing ring air channel is formed in the non-transmission end covers, and an air outlet communicating with the irregular counterbores, large air holes and the stator pressing ring air channel is formed in the non-transmission end covers; an air outlet formed between the counter bores and the inner wall of the base, the large air holes and the stator pressing ring air channel commonly form an external circulating air path; small air holes located in the sealed space of the motor are arranged at the periphery of the stator punching sheet, an air gap is formed between the stator assembly and the rotor assembly, and an axial ventilation channel is arranged in the rotor; and the small air holes, the air gap and the rotor form two internal circulating air paths.

Description

technical field [0001] The invention relates to the field of traction motors, in particular to a fully enclosed self-ventilating traction motor for 100% low-floor vehicles with low loss and low noise. Background technique [0002] 100% low-floor light rail vehicles refer to rail transit vehicles whose floor surface is generally below 250-400mm from the rail surface, which is 40% lower than the floor surface to rail surface height of 70% low-floor vehicles. The track can be directly laid on the road, or the original tram track can be used; the vehicle can pass through the curve with a small radius, which is suitable for the urban ground road conditions, and can significantly reduce the cost of the line. The train formation of 100% low-floor light rail vehicles is generally 4 to 5 sections, with a total length of 33 to 35m. It belongs to the medium-volume traffic mode and is suitable for trunk line traffic in small and medium-sized cities and branch line traffic in large citie...

AI Technical Summary

Problems solved by technology

The self-ventilated open structure is installed at the bottom of the low-floor vehicle. Rainwater can easily enter the motor through the air inlet and outlet, and then enter the junction box from the position of the lead wires, resulting in burnout of the three-phase lead wires.

The weight of the motor is 486kg, which cannot meet the needs of 100% low-floor vehicles with a motor weight of ≤440kg

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