High-capacity low-speed increased safety type three-phase asynchronous motor

Abstract

The invention discloses a high-capacity low-speed increased safety type three-phase asynchronous motor, which comprises a stator and a rotor, wherein the stator has an integral structure, and comprises a machine base and a sector plate; the machine base comprises two clapboards; the sector plate is arranged between the two clapboards and is laminated on the clapboards; a screw transversely passes through the two clapboards and the sector plate to fix machine base and the sector plate into the stator. The rotor is provided with a rotor support which is formed by welding steel plates; two ends of the rotor support are provided with a shaft sleeve and a subplate respectively; the two shaft sleeves are connected with each other through a cylinder; and the shaft sleeves on two sides are connected with the subplates through support bars. Because the high-capacity low-speed increased safety type three-phase asynchronous motor adopts the integral structure, after the machine base is processed, the sector plate is directly laminated on the clapboards and is tightened and welded by using the screw, and then the stator is formed. Because the stator, an end cover, a bearing and the rotor have a very high processing level, the rotor is not needed to be adjusted when inserted, and an air gap is automatically uniformized.

Description

technical field [0001] The invention relates to the field of motors, in particular to an increased safety three-phase asynchronous motor. Background technique [0002] The existing motor stator is a hoisting structure, which is composed of two parts: the stator core and the machine base. The stator core is hoisted into the machine base after being off-line, and the stator core is manually adjusted after being inserted into the rotor. Finally, the base plate and the stator core plate are connected and fixed with bolts. , because it is difficult to manually adjust the air gap, it is easy to cause uneven air gap between the stator and the rotor, causing problems such as motor vibration and noise. [0003] The rotor bracket of the existing motor rotor is integrally forged with No. 45, and is processed and formed after passing the flaw detection. However, due to the large outer diameter of the rotor bracket and the difficulty of forging, the scrap rate is high and the correspondi...

AI Technical Summary

Problems solved by technology

[0002] The existing motor stator is a hoisting structure, which is composed of two parts: the stator core and the machine base. The stator core is hoisted into the machine base after being off-line, and the stator core is manually adjusted after being inserted into the rotor. Finally, the base plate and the stator core plate are connected and fixed with bolts. , because it is difficult to manually adjust the air gap, it is easy to cause uneven air gap between the stator and rotor, causing problems such as motor vibration and noise

[0003] The rotor bracket of the existing motor rotor is integrally forged with No. 45, and it is processed and formed after passing the flaw detection. However, due to the large outer diameter of the rotor bracket and the difficulty of forging, the scrap rate is high and the corresponding cost is also high.

[0004] The existing increased safety motors are not allowed to produce corona and sparks during operation, but there is a potential danger of stator winding discharge or rotor sparks during the start-up process. If there is a certain concentration of explosive gas mixture inside the motor at this time, it may There will be an explosion, the consequences will be disastrous

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