WO2000001057A2 - Procede de montage d'un moteur electrique - Google Patents

Procede de montage d'un moteur electrique Download PDF

Info

Publication number
WO2000001057A2
WO2000001057A2 PCT/BR1999/000051 BR9900051W WO0001057A2 WO 2000001057 A2 WO2000001057 A2 WO 2000001057A2 BR 9900051 W BR9900051 W BR 9900051W WO 0001057 A2 WO0001057 A2 WO 0001057A2
Authority
WO
WIPO (PCT)
Prior art keywords
supporting block
stator
shaft
guide means
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/BR1999/000051
Other languages
English (en)
Other versions
WO2000001057A3 (fr
Inventor
Ingwald Vollrath
Egídio BERWANGER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Empresa Brasileira de Compressores SA
Original Assignee
Empresa Brasileira de Compressores SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Empresa Brasileira de Compressores SA filed Critical Empresa Brasileira de Compressores SA
Priority to EP99928934A priority Critical patent/EP1090454A2/fr
Priority to SK1995-2000A priority patent/SK19952000A3/sk
Priority to JP2000557537A priority patent/JP2002519988A/ja
Priority to KR1020007014773A priority patent/KR20010053187A/ko
Publication of WO2000001057A2 publication Critical patent/WO2000001057A2/fr
Publication of WO2000001057A3 publication Critical patent/WO2000001057A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/16—Centring rotors within the stators

Definitions

  • the present invention refers to a process for mounting a rotor and a stator of an electric motor of this type used in a hermetic compressor for a refrigeration system, with said rotor being carried by a supporting block and with the stator already mounted inside a motor housing.
  • a reciprocating hermetic compressor there is mounted, inside the shell thereof, a supporting block journalling a shaft which moves, through a connecting rod, a piston reciprocating inside a cylinder provided in a portion of the supporting block, said shaft carrying, with no axial gaps, a rotor of an electric motor.
  • the electric motor has a stator, which is mounted to the compressor shell and in whose inside is concentrically positioned the rotor carried by the shaft, being provided, between the rotor and the stator, a certain radial gap which is calculated so as to avoid uhe contact between said parts during operation of the motor.
  • the shaft of the connecting rod has an annular flange which seats onto an axial bearing defined in the supporting block concentrically with a throughbore provided ir. the latter and into which the shaft is introduced and radially journalled.
  • the fixation of the supporting block to the stator is achieved by means of fixation screws acting on both said parts.
  • the supporting block has fixation holes located parallely to the throughbore for mounting the shaft, each fixation hole being aligned with a respective mounting hole provided in the stator and dimensioned as a function of the dimensions of the fixation screw to be used.
  • This fixation system leads to a high number of parts being returned from the mounting line and reprocessed, which parts need to be dismounted and remounted, after eliminating the problems detected in said parts and which caused the devolution thereof .
  • One of the problems of mounting the motor to the supporting block by screwing refers to the requirement of an adequate planing of the contact faces of the stator and the cylinder block, in order to avoid misalignment of the stator axis in relation to the shaft axis, which will lead to a decentralization of the rotor in relation to the stator and, consequently, of the contact therebetween during operation of the motor.
  • the latter In order to obtain an adequate planing of the contact face of the supporting block, the latter must have a precise machining with adequate tooling.
  • the amount of laminations which form said stator and the radial thickness and dimensioning of each lamination are calculated as a function of the amount of screws needed for each compressor model .
  • Another objective of the present invention is to provide a mounting process as cited above, which does not require modifications in the lamination stack of the stator, such as increasing the dimensions as a function of material removal or also increasing the radial gap upon material being removed from either the rotor or the stator of the electric motor.
  • a further objective of the present invention is to provide a mounting process with the above cited advantages, which does not require planing of the ad acents faces of each of the parts defined by the supporting block and the stator.
  • a process for mounting an electric motor comprising a stator, which is affixed inside a motor housing affixed to a supporting block; and a rotor affixed around a shaft, which is axially and radially retained in a bearing incorporated to the supporting block, said process comprising the steps of: a- mounting a guide means to one of the parts defined by the stator and the supporting block: b- slidingly fitting the other of said parts into the guide means, in order to make the axes of the stator and the bearing of the supporting block coincide with each other, said displacement being limited by seating at least an end portion of the motor housing against the supporting block; c- affixing, without applying tension, the motor housing to the supporting block in the seating position; and d- removing the guide means from the part to which it has been mounted.
  • Figure 1 shows, schematically and in a longitudinal vertical sectional view, a reciprocating compressor having the stator of its electric motor affixed to the supporting block, through a plurality of fixation screws, according to the prior art;
  • Figure 2 shows, schematically and in a longitudinal vertical sectional view, a reciprocating compressor having the stator of its electric motor affixed to the supporting block, according to the present invention
  • Figure 3 shows, schematically and in an exploded perspective view, the supporting block and the stator of the electric motor of the present invention
  • Figure 4 shows, schematically and in a perspective view, a reciprocating compressor having its supporting block affixed to the motor housing, according to the present invention
  • an electric motor for example of the type used in a hermetic compressor with a vertical shaft, such as illustrated in figure 1, and which comprises a hermetic shell 1 defining, in the bottom thereof, a sump 2 of lubricant oil and lodging therewithin a supporting block 10 which has, in an end portion, a cylinder 11 and which incorporates, in a median portion, concentrically with a throughbore 12, a bearing 13 , axially and radially supporting a shaft 20, which is vertical and has, at an upper portion, an eccentric 21 articulated through a connecting rod 30 to a piston 40 reciprocating inside a cylinder 11, as a function of the rotation of the shaft 20.
  • Shaft 20 is provided, at its upper portion, with a flange portion 22 which seats onto the bearing 13 of the supporting block 10 and, at its lower portion, with an oil pump 23 which takes oil from the sump 2 to the parts with relative movement and needing lubrication.
  • the shaft 20 also carries, between the flange portion 22 and the oil pump 23, a rotor 50, of the electric motor of the compressor, affixed to said shaft 20 with no radial gaps.
  • the supporting block 10 is affixed to an electric motor stator 60 in the form of stack of aligned and superposed laminations, so that the rotor 50 carried by the shaft 20 be located inside and concentrically in relation to the stator 60 and presents a certain previously calculated minimum radial gap in relation to said stator 60.
  • the supporting block 10 is provided with fixation holes 14, each receiving a respective fixation screw 15, which fits into a respective mounting hole provided in the lamination stack of the stator 60, in order to retain to the latter the supporting block 10.
  • the mounting of the supporting block 10 to the stator 60 of the electric motor is obtained by a mounting process to be described ahead, in which the supporting block 10 is attached to a motor housing 70, for example in the form of a tubular body with its ends opened and retaining, internally, the stator 60 of the electric motor .
  • the stator 60 For mounting the stator 60 inside the motor housing 70, the latter is previously heated so that, when dilated, presents a diameter which is sufficient to receive the stator 60. In the thermal contraction, the diameter of the motor housing 70 is reduced, surrounding the stator 60 and retaining the latter with no radial gaps.
  • a guide means 80 which guides the sliding fitting of the other of said parts, so as to make coincide the axes of the stator 60 and the bearing 13 of the supporting block 10, said guide means 80 further determining that, between the stator 60 and the rotor 50 be established a minimum radial distance which results in a desired uniform air gap throughout the whole axial and circumferential extension of the rotor 50.
  • the relative sliding between the supporting block 10 and stator 60 is limited by seating at least an end portion 71 of the motor housing 70 against the supporting block 10.
  • the guide means 80 is removed from the part to which it has been mounted, after the fixation between the supporting block and the motor housing has been obtained.
  • the fixation is obtained without applying any tension, for example, by gluing or welding the parts to each other.
  • the motor housing 70 is provided, from one of its end portions, with axial projections, for example three, each defining an end portion 71 to be fitted into a respective receiving recess 16 provided in a mounting face 17 of the supporting block 10 and whose depth is calculated as a function of the limitation of the desired relative approximation between the supporting block 10 and the motor housing 70.
  • the motor housing 70 carries, externally, mounting flanges 71, having for instance an "L" profile and through which the housing affixing the stator 60 is mounted inside the hermetic shell 1 of the compressor.
  • At least one of the parts defined by the end portion 71 and by the receiving recess 16 receives, before the mutual fitting, an amount of adhesive which will be cured afterwards to provide the fixation between the supporting block 10 and the motor housing 70.
  • the shaft 20 upon mounting the electric motor, the shaft 20 is introduced inside the throughbore 12 provided in the supporting block 10, until its peripheral flange 22 seats onto the bearing 13 of the supporting block 10, before receiving and affixing the rotor 50, before mounting the supporting block 10 to the motor housing 70.
  • the guide means 80 has an annular shape and is placed between the stator 60 and the rotor 50, in order to define the radial gap therebetween .
  • the guide means 80 has a stop portion 81 in the form of a cylindrical hub, which is provided at least partially outside the stator 60, during assembly of the motor, and wherefrom are projected axial blades 82, which are circumferentially disposed from the external surface of the cylindrical hub, for example equally spaced from each other and having a thickness corresponding to the air gap to be provided between the rotor 50 and stator 60.
  • the guide means 80 in this solution may be mounted to the stator 60, in such a way as to receive the sliding fitting of the rotor 50 mounted to the shaft 20 which is journalled to the supporting block 10, or it may be mounted around the rotor 50 already affixed to said shaft 30 which is journalled to the supporting block 10.
  • the guide means 80 has the shape of a cylindrical hub dimensioned so as to occupy the entire radial space between the stator 60 and the shaft 20.
  • the guide means 80 may be mounted to the stator 60, in order to receive the sliding fitting of the shaft 30 which is journalled to the supporting block 10, or be mounted around the shaft 30 which is journalled to the supporting block 10, in order to be slidingly fitted into the stator 60.
  • the rotor 50 is affixed around the shaft 20 which is already journalled to the supporting block 10, in an initial step of the mounting process of the motor according to the present invention, prior to a seating step of the supporting block 10 to the motor housing 70.
  • the guide means 80 is in the form of a hub which is dimensioned to occupy the whole internal diametral space of the stator, having a radius corresponding to the sum of the air gap, of the radial thickness of the rotor 50 and of the shaft 20 and which is placed between the stator 60 and the bearing 13 of the supporting block 10.
  • the guide means 80 may be mounted to the stator 60, so as to be slidingly fitted in the bearing 13 of the supporting block 10 or mounted to the bearing, in order to receive the sliding fitting of the stator 60 of the supporting block 10.
  • the shaft 20 is mounted to the bearing 13 of the supporting block 10 and receives posteriorly the rotor 50, which is affixed around a portion of the longitudinal extension of said shaft 20 which is already journalled to the supporting block 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Compressor (AREA)
  • Motor Or Generator Frames (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

Ce procédé de montage d'un moteur se décompose en plusieurs temps. Le procédé consiste d'abord a) à monter un organe de guidage (80) sur l'une des pièces définies par un berceau (10) comportant un palier (13) et par un stator (60) d'un moteur électrique qui est fixé à l'intérieur d'un carter de moteur (70) fixé au berceau (10). Le procédé consiste alors b) à faire glisser dans l'organe de guidage (80) les autres pièces considérées de façon à présenter l'axe du stator (60) dans l'axe du palier (13) du berceau (10). Le déplacement se limite à la pose d'au moins une extrémité (71) du carter moteur (70) sur le berceau (10). Le procédé consiste ensuite c) à fixer, sans appliquer de tension, le carter moteur (70) sur le berceau (10) en position posée. Le procédé consiste enfin d) à déposer l'organe de guidage (80) de la pièce sur laquelle il a été monté.
PCT/BR1999/000051 1998-06-26 1999-06-22 Procede de montage d'un moteur electrique Ceased WO2000001057A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP99928934A EP1090454A2 (fr) 1998-06-26 1999-06-22 Procede de montage d'un moteur electrique
SK1995-2000A SK19952000A3 (sk) 1998-06-26 1999-06-22 Proces upevnenia elektromotora
JP2000557537A JP2002519988A (ja) 1998-06-26 1999-06-22 電動機を取り付ける方法
KR1020007014773A KR20010053187A (ko) 1998-06-26 1999-06-22 전동기의 장착 방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR9802567A BR9802567C1 (pt) 1998-06-26 1998-06-26 Processo de montagem de motor elétrico.
BRPI9802567-8 1998-06-26

Publications (2)

Publication Number Publication Date
WO2000001057A2 true WO2000001057A2 (fr) 2000-01-06
WO2000001057A3 WO2000001057A3 (fr) 2000-02-10

Family

ID=4069981

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR1999/000051 Ceased WO2000001057A2 (fr) 1998-06-26 1999-06-22 Procede de montage d'un moteur electrique

Country Status (6)

Country Link
EP (1) EP1090454A2 (fr)
JP (1) JP2002519988A (fr)
CN (1) CN1310877A (fr)
BR (1) BR9802567C1 (fr)
SK (1) SK19952000A3 (fr)
WO (1) WO2000001057A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4481024B2 (ja) * 2004-01-30 2010-06-16 三菱電機株式会社 電動機製造治具および電動機の製造方法
ES2415505T3 (es) * 2010-05-06 2013-07-25 The Switch Drive Systems Oy Una máquina eléctrica y un procedimiento para el montaje de ésta
CN102710070B (zh) * 2012-06-14 2015-02-25 湘潭电机股份有限公司 一种定子与转子合装的装配装置
CN105858154B (zh) * 2016-04-28 2018-06-26 浙江厚达智能科技股份有限公司 电机定子端子插入机的端子理料机构
CN111313623A (zh) * 2019-11-29 2020-06-19 青岛中加特电气股份有限公司 永磁电机的组装方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT618278A (fr) * 1958-11-04
US4031610A (en) * 1974-04-30 1977-06-28 Airborne Mfg. Co. Method of assembly of dynamoelectric machines
US4128935A (en) * 1978-01-05 1978-12-12 Whirlpool Corporation Assembly method for a motor
DE3318921A1 (de) * 1983-05-25 1984-11-29 Robert Bosch Gmbh, 7000 Stuttgart Motorverdichter
US5033941A (en) * 1990-02-27 1991-07-23 American Standard Inc. Method for assembling rotors without fixtures

Also Published As

Publication number Publication date
EP1090454A2 (fr) 2001-04-11
JP2002519988A (ja) 2002-07-02
BR9802567A (pt) 2000-03-28
BR9802567C1 (pt) 2000-07-04
CN1310877A (zh) 2001-08-29
SK19952000A3 (sk) 2001-06-11
WO2000001057A3 (fr) 2000-02-10

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