KR970018910A

KR970018910A - Induction Motor for Centrifugal Compressor

Info

Publication number: KR970018910A
Application number: KR1019970002193A
Authority: KR
Inventors: 임기순; 박인철
Original assignee: 김평길; 삼진 주식회사
Priority date: 1997-01-27
Filing date: 1997-01-27
Publication date: 1997-04-30

Abstract

본 발명은 고속회전이 가능한 원심압축기용 유도전동기에 관한 것으로서, 종래의 유도전동기는 저속회전(3400∼3550rpm)을 기준으로 회전자 슬롯의 형상과 슬롯충전바 및 고정자 슬롯의 형상은 물론이고 회전자와 고정자 사이의 공극 등이 설계되었기 때문에 60000rpm이상의 고속회전시 공극내에서의 냉각유체 유동과 리액턴스 누설 및 기자력 구속 등에 의한 효율저하와 과도한 원심력에 의한 회전자 파괴 등의 문제점을 해결하기 어려운 것이었다.The present invention relates to an induction motor for a centrifugal compressor capable of high speed rotation, and a conventional induction motor is a rotor as well as a shape of a rotor slot and a slot filling bar and a stator slot based on a low speed rotation (3400 to 3550 rpm). Because the air gap between the rotor and the stator is designed, it is difficult to solve the problems such as the decrease of efficiency due to cooling fluid flow, reactance leakage and confinement of magnetic fluid during the high speed rotation of more than 60000rpm, and rotor destruction by excessive centrifugal force.

이를 해결하기 위하여 본 발명은 원통형의 회전자 코어(11) 등을 포함한 회전자(1)와 고정자2)로 이뤄져 있는 원심압축기용 유도전동기에 있어서, 상기 회전자(1)는 회전자 코어(11)등을 외주면 부근에서 원형상으로 배치되고 그 외주면의 외곽까지 평행하게 형성되어진 슬롯개구부(1b)을 갖고 있는 다수의 원형단면의 원형 슬롯(1a)과, 이 원형 슬롯(1a) 및 슬롯개구부(1b)에 슬롯 충전바(1c)를 이루도록 충전됨과 아울러 상기 회전자 코어(11)의 양단에 일체로 돌출형성되어진 엔드링(12)과, 이 엔드링(12)의 외곽며에 억지끼워맞춤으로 압입 결합되어져서 고속회전시 회전자 코어(11) 양단의 엔드링(12) 침식을 방지하도록 보호하여 주는 보호캡(13)으로 구성됨을 특징으로 하는 원심압축기용 유도전동기를 제공하는데 있다.In order to solve this problem, the present invention is an induction motor for a centrifugal compressor comprising a rotor (1) and a stator (2) including a cylindrical rotor core (11), wherein the rotor (1) is a rotor core (11). ), A circular slot 1a of a plurality of circular cross sections having a slot opening portion 1b arranged in a circular shape near the outer circumferential surface and formed in parallel to the outer circumference of the outer circumferential surface, and the circular slot 1a and the slot opening portion ( 1b) is filled to form a slot filling bar 1c and is integrally protruded from both ends of the rotor core 11 and the outer ring of the end ring 12 by interference fit. It is to provide an induction motor for a centrifugal compressor, characterized in that it is composed of a protective cap 13, which is press-coupled to prevent erosion of the end ring 12 on both ends of the rotor core 11 during high-speed rotation.

Description

Induction Motor for Centrifugal Compressor

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

도2는 본 발명의 유도 전동기를 축의 수직방향에서 잘라본 요부 단면도.2 is a cross-sectional view of the main parts taken from the vertical direction of the shaft of the induction motor of the present invention.

도3은 도2에서 회전자를 발췌하여 그 일부를 파단한 상태의 참고 사시도.FIG. 3 is a reference perspective view of a state in which a part of the rotor is broken in FIG. 2;

도4는 도2에서 고정자 슬롯과 회전자 슬롯 부분을 확대하여 나타낸 상세도.4 is an enlarged detail view of a stator slot and a rotor slot in FIG. 2; FIG.

도5는 본 발명에 따른 회전자를 다르게 실시한 분해 사시도.Figure 5 is an exploded perspective view of a different implementation of the rotor according to the present invention.

Claims

In an induction motor for a centrifugal compressor consisting of a rotor (1) including a cylindrical rotor core (11) and the like, and a stator (2), the rotor (1) is located near the outer circumferential surface of the rotor core (11). Slot slots 1a of a plurality of circular cross-sections having a slot opening portion 1b arranged in a shape and formed in parallel to the outer periphery of the outer circumferential surface thereof, and slot filling bars (a) in the circular slot 1a and the slot opening portion 1b. 1c) and the end ring 12, which is integrally protruded from both ends of the rotor core 11, and is press-fitted to the outer surface of the end ring 12 by press fit to the high speed rotation Induction motor for a centrifugal compressor, characterized in that it consists of a protective cap (13) to protect the end of the rotor core (11) to prevent erosion of the end ring (12).

2. The stator (2) is characterized in that the slot wedge (2e) having a convex cross-sectional shape is installed so that grooves do not exist in the slot opening portion (2d) of the stator slot (2a). Induction motor for centrifugal compressors.

According to claim 1, wherein the rotor (1) is formed so that the slot filling bar (1c) of the second rotor core (11A) protrudes at a predetermined length from the flat surface of the upper and lower ends of the second rotor core (11A) And a second end ring 12A having a plurality of bar holes 12a corresponding to the slot filling bars 1c at both ends of the rotor core 11A is fitted and fixed by pressing or welding. Induction motor.

The method of claim 1, wherein the circular slot (1a) of the rotor core 11 is formed of 4 to 6mm so that the surface temperature of the rotor core 11 by the secondary induced current value does not exceed 400 ℃ or more, The cutting width of the slot opening 1b is a centrifugal compressor characterized in that it is formed in 0.4 ~ 0.5mm to prevent breakage and dedance of the slot filling bar (1c) due to excessive centrifugal force when the rotor core 11 rotates at 60000rpm Induction motor.

The induction motor of a centrifugal compressor according to claim 1, wherein the air gap (g) formed between the rotor (1) and the stator (2) is formed at 0.5 to 0.6 mm.

※ Note: The disclosure is based on the initial application.