A copper alloy retaining ring for motor rotor

Abstract

The invention discloses a copper alloy retaining ring used on a motor rotor. The copper alloy retaining ring is composed of the following components: the alloy contains: 30.0-35.0% Cu, 5.0-9.6% Pb, 0.05 ~0.25% P, 10.0~20.0% Sn, 1.0~4.8% Ni, 0.3-1.0% Al, 15.0-20.0% Fe, 0.02-0.05% Mn, and the rest are Zn and unavoidable impurities. The copper alloy of the above material, in addition to the high strength performance of the steel retaining ring, also has high toughness, good thermal conductivity, electrical conductivity and stress corrosion resistance, which is helpful for reducing the temperature rise of the rotor and reducing the rotor end. Fracture has a noticeable effect.

Description

technical field [0001] The invention relates to the technical field of motor spare parts, in particular to a copper alloy guard ring applied to a motor rotor. Background technique [0002] For some special-purpose high-power motors that use copper row rotors, the rotor pressure ring supports the inner circle of the end ring, and the eccentric unbalanced force of the end ring during rotation is borne by the rotor pressure ring. But the actual situation is that after the high-frequency induction welding process, there is a gap of about 1~10mm between the inner circle of the end ring and the rotor pressure ring, the end ring is in a state of free suspension, and the eccentricity is unbalanced. A protective ring is set on the upper sleeve; [0003] The patent number is 201220482976.3, the name is a rotor guard ring structure, which discloses a rotor guard ring, a rotor guard ring structure, including a copper end ring and a guard ring, the copper end ring is sleeved on the roto...

AI Technical Summary

Problems solved by technology

Some of these motors now use steel retaining rings, which have high strength performance and can only meet the protection requirements of some small-power motor rotor copper bars.

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