FR2531284A1 - ASSEMBLY METHOD AND APPARATUS FOR DYNAMOELECTRIC MACHINES - Google Patents

Abstract

THE INVENTION CONCERNS A METHOD AND AN APPARATUS FOR ASSEMBLING DYNAMO-ELECTRIC MACHINES AND THE MACHINES MANUFACTURED BY THIS PROCESS OR BY MEANS OF THIS APPARATUS. ACCORDING TO THE INVENTION, THE STATOR 33 OF THE MACHINE INCLUDES TENSIONS 37 EQUIPPED AT THEIR OPPOSITE ENDS WITH AXIAL WELDING LEGS WHILE THE FLANGES 27, 27A ARE EQUIPPED WITH SIGNIFICANTLY LARGER OPENINGS TO RECEIVE THEM. DEPENDING ON THE PROCEDURE, WE PLACE ONE OF THE FLANGES ON A SEAT 87, ADAPT ROTOR 47 WITH ITS SHAFT 43 TO IT, PLACE A SET OF SHIMS 107 AROUND THE ROTOR, WE PLACE STATOR 33 AROUND THE SHIMS THEN ON MOUNT THE SECOND FLASK ON THE OTHER END OF THE STATOR AND SIMULTANEOUSLY WELD ALL THE LEGS IN THE OPENINGS. BE CAREFUL, DURING ASSEMBLY, THAT THE LEGS DO NOT COME IN CONTACT WITH THE SIDE WALLS OF THE OPENINGS SO THAT ANY RESIDUAL STRESS IS AVOIDED AND THAT, ON ASSEMBLY, ALL THE POSSIBLE FAILURES OF THE OBLIQUITY OF THE BORING OF STATOR OR LEFT-HANDING OF FLANGES.

Description

As a rule, we classify dynamo-electric machines, such as

electric motors,

  basically in three different types of construction

  rents, i.e. closed motors, protected motors and open motors A definition of a closed motor is that it is enclosed so as to prevent the free exchange of air between the inside and the outside of the motor housing but is not closed enough to be airtight and an example of such a closed motor is

  described in U.S. Patent No. 2,974,856 A defini-

  tion of an open motor is that it has openings

  ventilation res that allow the passage of external cooling air on and around the windings of such an open motor and examples of such an open motor are described in US Patents NO 3,164,422, and NO 3,858,067 A definition of a sheltered motor is that it is an open motor in which the openings of

  ventilation are constructed in such a way that a function

  satisfactory operation is not hindered when drops of liquid or particles hit its housing

  or enter it at any angle between approx.

  ron Oeet about 150 with respect to the vertical, from top to bottom, and an example of such a sheltered engine is described in US Patent No. 3,270,223 The above definitions can be found for closed, sheltered and open engines in the book, by CG Veinott entitled "Fractional and Subfractional Horse-power Electric Motors"

  fractional) (third edition, McGraw-Hill Book Co).

  In the open engine construction of the bre-

  vet of the aforementioned USA No. 3,858,067, several tie rods fixed to a stator have two opposite end parts

  received inside several respectively formed alveoli

  tively in two opposite end flanges To secure the opposite end flanges against movement relative to the end portions of the tie rods, metal plugs are solidified and contained in the cells and they are respectively

  fixed between the respective ends of opposite ends

  ves of tie rods and at least part of the cells. Various methods and apparatuses have been used

  for the assembly of such dynamo-electric machines.

  For example, in the method and apparatus described in

  U.S. Patent No. 3,857,150, two end flanges

  mite 1 a rotor and a stator are aligned with respect to each other so as to compensate for any defect

  of square of the opposite end faces of the stator and -

  a hardenable material is introduced between the opposite end parts of a series of tie rods carried by the stator and the flanges so as to join together the elements of the dynamoelectric machine in

  their layout aligned and assembled.

  In the method and apparatus described in

  the aforementioned US Patent No. 3,164,422, a flask of ex-

  end of the dynamo-electric machine is provided with an approximately central bearing assembly and is placed in a preselected position on a seat provided on a device for assembling the apparatus

  When this first end flange

  opposite mite is thus placed on the seat of the assembly device, four welding flanges spaced from each other, arranged approximately around its periphery and formed in one piece with it, extend approximately vertically upwards above it A rotor and shaft assembly includes two stop and oil spray members

  opposite respectively fixed from the shaft through the

  appears to be a bearing of said first end flange until the stop and oil spraying member is in abutment against the bearing assembly of this first flange There is provided a positioning recess associated with the device assembly of the apparatus to receive the first end of the shaft of the rotor assembly and shaft approximately as it was introduced through the bearing assembly of the first flange The first end of the tree being so

  received in the device positioning recess

  reil, we place the rotor and shaft assembly in a

  preselected position in which it extends per-

  perpendicular to the seat of the device

  assembly on which the first flange is placed.

  After having thus positioned the rotor and shaft assembly and the first flange in their preselected positions with respect to each other, a set of shims of the device is introduced through the ventilation openings provided for this end in the first flange in positions in which these

  shims are arranged around the periphery of the rotor.

  At this time, the bore of the stator of the dynamoelectric machine is also placed around the rotor with the shim clearance in adjustment support between them so as to form an approximately uniform gap between the periphery of the rotor and the bore of the stator. When the stator is lowered in place around the rotor, its lower end face abuts against a series of positioning fingers intended to cooperate with it and arranged in predetermined locations of the device relative to its assembly device and, in this way, the lower end face of the stator is placed in position in a predetermined manner or vertically spaced from the first flange placed on the

  seat At the same time, four peri-

  stator spheres are arranged inside the four welding flanges formed on the first flange and at least closely adjacent to these flanges The stator of the dynamo-electric machine being thus placed

  on the positioning fingers of the device and also

  relative to the rotor and the first flange, we

  shows the bearing assembly and the other end flange

  mite on the opposite end of the shaft and in abutment against the other stop and oil projection member wedged on the other end of the shaft Like the first flange, the other flange is provided with four

  welded flanges spaced, approximately perimeter

  which formed in one piece with it and which extends

  tooth approximately vertically with respect to its surface When sliding the bearing assembly of the other flange on the other end of the shaft, the four welding flanges of the other flange are arranged around the four surfaces of stator welding at least

  in a closely related arrangement of these sur-

  faces and in an approximately axial arrangement-

  aligned and spaced from the four welding flanges of the

  first flange Another assembly device is tightened

  upper or opposite locking of the device against the other

  flange and the upper assembly device is operated

  laughing to ensure the abutment of the bearing assemblies of the opposed flanges against the opposite stop and oil projection members mounted respectively on the opposite ends of the shaft, thus ensuring that there is no axial play between the rotor and shaft assembly and the opposite flanges Then, we

  operates the upper assembly device of the appliance

  reil to lift the other flange from a pre-

  lectionée, generally between about 1 mm and about 1.3 mm, which simultaneously raises or spreads the bearing assembly of the other flange out of support against the stop member and oil projection carried by the other end of the shaft so as to introduce a predetermined amount of axial play in the dynamo-electric machine between the rotor and shaft assembly and the opposite end flanges While the upper assembly device of the maintains the other

  flange in its raised position to ensure the hand-

  In accordance with the preselected axial play in the dynamo-electric machine, four welding devices are moved from the device to the position to simultaneously weld the four flanges located on the first end flange to the four welding surfaces of the stator associated with them. having carried out these welds, the four welding devices of the apparatus are moved to another position to simultaneously weld the four welding flanges of the other flange to the four surfaces

  welding stator peripherals associated with them

  ciées After welding the end flanges oppo-

  placed on the stator to carry out the final assembly of the dynamoelectric machine in the assembly apparatus,

  the dynamo-electric machine is removed in the assembled state

wheat out of said device.

  A particular problem which arises during the assembly of a dynamo-electric machine is that

  avoiding the establishment of radial constraints is sufficient

  to produce a non-uniform air gap between the

  rotor and the bore of a stator which surrounds it The non

  uniformity of the air gap can also occur as a result of warping of the end flanges of

  same as due to an obliquity of the stator bore.

  According to one aspect of the present invention, there is provided a method for fixing a series of tie rods of a fixed assembly of a dynamoelectric machine to two end flanges of said machine, respective tabs extending from the opposite ends. tie rods while each of the flanges has a series of openings which pass through it, the openings being dimensioned in a predetermined manner, larger than the legs, this method consisting in placing the legs situated at the opposite ends of the tie rods

  at least partly inside the openings respec-

  tives formed in the flanges and to space the legs of the side walls of the openings; and to weld at least part of the flanges approximately simultaneously

  adjacent to the respective openings to at least one par-

  tie of each of the legs which are housed there.

  According to another aspect of the present invention,

  a method is provided for assembling a dynamo machine

  electric having a fixed assembly and a rotating assembly,

  the fixed assembly comprising two opposite end flanges

  ss crossed by respective series of openings, a

  stator and a series of tie rods fixed to the stator, the

  opposite half of the tie rods being provided with respective lugs

  tives which extend in opposite directions; and the rotating assembly comprising a rotor fixed to a shaft between the opposite end parts of the latter, this

  method of placing a first flange and inserting it

  seems to rotate approximately in preset positions so that one of the end portions

  of the tree extends through an approximate opening

  central formation formed in the flange; aligning a bore of the stator at least partially around the rotor to define an air gap between them; to receive the tabs located at a first end of the tie rods in the respective openings of the series of openings

  formed in the positioned flange; to arrange the open-

  tures of the series of openings formed in the second flange approximately around the legs situated at the

  second ends of the tie rods; and solder the flas-

  that at least approximately in the vicinity of the series

  respective openings to at least part of each

  one of the legs housed in the respective openings.

  According to another aspect of the present invention, there is provided a dynamo-electric machine which comprises: an end flange which has an opening which intersects its opposite faces; a tie supporting the flange and which has a stop surface in abutment against a first of said opposite faces in a

  location adjacent to its intersection with the opening

  ture, a leg formed in one piece with the

  abutment surface and extending in the axial assembly-

  ment from the latter, at least partly through the opening, a free end of the tab being arranged spaced adjacent to the other of said opposite faces and the tab being dimensioned in a predetermined manner smaller than the opening so as to form a predetermined spacing between a

  side wall of the opening and the leg; and

  hard which extend in the space between the side wall and the tab to connect between them the flange and the free end of the tab at least in the vicinity of the intersection of the side wall with the other face of the

  flaccid and therefore maintain a predeter-

  mined, the spacing between the leg and the side wall.

  According to another aspect of the present invention

  tion, there is provided a dynamo-electric machine which comprises: two opposite end flanges each of which is provided with a series of openings which pass through it;

  a series of tie rods, each of which has its outer parts

  opposite mites with respective legs which extend

  tooth at least partly through the corresponding openings

  of the respective flange, the legs being dimen-

  in a predetermined way smaller than

  the openings and being arranged in a predefined manner

  terminated in an arrangement spaced from the openings; and each flange being assembled by

  respective series of welds adjacent to the openings

  tures with at least part of each of the respective legs.

  According to another aspect of the present invention

  tion, there is provided an apparatus for fixing a series of tie rods provided on a fixed assembly of a dynamo-electric machine with two opposite end flanges of said machine, the tie rods comprising two series of lugs formed respectively on their parts opposite ends and the flanges having two series of openings which pass through them which are of a

  predetermined larger than the cor-

  corresponding, this apparatus comprising means for placing a first of said flanges so that a

  first of opposite ends of at least one of -

  tie rods is in abutment against it, while a first of the tabs formed on the opposite ends of each of the tie rods is received in each of the openings in the series of openings formed in the first flange in an arrangement spaced apart from said opening; means for urging the second end flange to bear against the second ends of at least two

  tie rods, the second legs formed on these ends

  opposite half of the tie rods being received in openings

  tures of the second series of openings formed in the second flange in an arrangement spaced from the corresponding openings; and means for approximately simultaneously welding at least a portion of each of the first and second tabs to the first flange and to the second flange at least at locations approximately adjacent to each of the openings of the first series of openings and the second series of openings, when the legs and the series of openings are in their spaced relative arrangement

  The rest of the description refers to

  appended figures which represent, respectively: figure 1, an exploded perspective view of a dynamo-electric machine; Figures 2-6 and 9, partial sectional views which illustrate a method of assembling the dynamo-electric machine of Figure 1; Figure 7, a partial elevational view, on a larger scale, of an end flange of the dynamo-electric machine of Figure 1, this view showing an opening of the flange and a tab of a stator rod the dynamoelectric machine received there; Figure 8, a sectional view, taken along line 8-8 of Figure 7; Figure 10, a schematic front view in elevation of an apparatus designed to assemble the dynamo-electric machine of Figure 1; Figure 11, a plan view of a lower assembly device of the apparatus of Figure 10, partial sectional views of the lower assembly device being shown in Figures 3 and 4; Figure 12, a partial sectional view, taken along line 12-12 of Figure 11; Figure 13, a partial elevational view

  lateral, on a larger scale, of an assembly device

  upper wiring of the device of Figure 10, a sectional view of the upper assembly device being shown in Figure 9; Figure 14, a top plan view of the upper assembly device of Figure 13; Figure 15, a sectional view, on a larger scale, showing the dynamo-electric machine of Figure 1, in section; Figure 16, an elevational view of the right side of the dynamo-electric machine of Figure 15; Figure 17, a partial sectional view

253,1284

  representing another bearing construction for the dynamoelectric machine of FIG. 1, associated with

a flange of this machine.

  The same references were used to designate

  generate the same elements in all the figures of the drawings. In the drawings to which reference will generally be made, a dynamo-electric machine 21 is shown which comprises a fixed or stationary assembly 23 and a rotating assembly 25 (FIGS. 1

  to 9) The fixed assembly 23 comprises two flanges of ex-

  opposite ends each fitted with a series 29 and, respectively

  29, has openings running through them, the flange

  27 also comprising an approximate opening 31

  central stator (FIG. 1) A stator 33 of the fixed assembly 23 is crossed by a bore 35 and a series of tie rods 37 are fixed to the stator The tie rods 37 are

  fixed to stator 33 in the vicinity of a peripheral surface

  than of the latter We will find a description more

  detailed construction and fixing of the tie rods to the stator in the aforementioned US patent

No. 3,858,067.

  The two opposite series of ends 39 and, respectively, 39 has tie rods 37 are provided with two

  series of legs 41 and, respectively, 41 a which extends

  tooth in opposite directions (Figure 1) The whole

  ble turning 25 comprises a shaft 43 which comprises two opposite end parts or extensions 45, 45 a and

  a rotor 47 is fixed to the shaft between the end parts

  opposite half of the latter (Figure 1) The flange 27 and the rotary assembly 25 are placed approximately in preselected positions or assembly positions so that the end portion 45 of the shaft extends through the central opening 31 of the flange (FIGS. 2 and 3) The bore 35 of the stator is aligned at least in part around the rotor 47 of the rotating assembly to define between them a desired or predetermined air gap and the tabs 41 formed on the ends 39 tie rods 37 are received in the openings 29 of the flange 2-7, the tabs and the openings being placed in a provision

  relative spacing predetermined spacing (Figures 5 to 8).

  The openings 29a of the flange 27a are disposed approximately

  matively around the legs 4 la formed on the ends

  mites opposite 39 to tie rods 37, the tabs and the openings being placed in a predetermined spaced relative arrangement, and the flanges 27, 27 a are welded simultaneously, at least approximately in the vicinity of the openings 29, 29 a which are formed therein, legged

  41, 41 has received in these openings, the provision relating

  tive spaced from the legs and openings being main-

naked (Figure 7).

  More specifically and as shown on

  Figures 1 and 15 which will be referred to in particular

  bind, the flanges 27 and 27 a are stamped and punched or punched or otherwise formed in a metal sheet, such as a steel sheet Since the two flanges are approximately identical, only the flange 27 will be described more completely, the similar parts of the flange 27 a being

  identified by adding the letter "a".

  An approximately planar part 49 of the

  flange 27 extends around a central part of the flange

  which which has a chambered part 51 forming a boss formed as a whole The boss 51 comprises a

  side wall 510 approximately cylindrical extends

  axially and a base wall 530 which is part

  integral with the side wall, a passage opening 31

  tree sage being formed through the base wall.

  The base wall 530 forms a partially spherical bearing seat surface 53 in which is pressed at least one key 551 designed to be engaged in a provision preventing rotation at

  less to a limited extent, on a key groove

  vette 571 formed on a bearing 71 of the alignment type

  automatic, as will be described in more detail below

  after. The flat part 49 of the flange 27 has ventilation openings 55 arranged around the

  boss 51 and a series of reinforcing ribs 57.

  Openings consisting of elongated slots 29 each having a side wall 59 extend between the opposite faces 61, 63 of the flange 27, the openings being arranged in preselected locations located generally radially outside the boss and approximately adjacent to a marginal edge or peripheral part 65 of the flange A series of surfaces 67

  support rods are formed on the face 63 of the flas-

  27 in the vicinity of the intersection of the side walls

  the 59 of the openings with the face 63 Although the over-

  face 53 a of the bearing seat of the flange 27 a is represented

  felt as being closed, as can be seen in FIG. 9, it is envisaged that a shaft passage orifice similar to orifice 31 can be formed therein

formed in the flange 27.

  Two lubrication and bearing assemblies 69, 69 a are associated or pre-assembled respectively with the flange 27 and with the flange 27 a around their boss portion 51 and 51 a, respectively, these assemblies

  comprising bearings or self-supporting means

  respective alignment 71, 71 a which have bores

  ges 73, 73 a in which the shaft is rotated

  and surfaces 75, 75 a thrust supports which extend

  tooth approximately around the bores Given that the lubrication and bearing assemblies 69, 69 a have an almost identical construction, only the lubrication and bearing assembly 69 will be described in detail,

  and we will identify the corresponding elements of the set

  lubrication and bearing ble 69 a by adding

of the letter "a".

  As shown in FIG. 15 to which reference will be made more particularly, the lubrication and bearing assembly 69 comprises the bearing 71, a device 813 with a wick for supplying lubricant, a wicking material 815 for lubricant storage and a 817 case forming a cover serving to contain the lubricant storage wick material A bore

  73 for receiving or supporting the shaft extends into the

  seems axially through the bearing 71 which is of the self-aligning type and has partially spherical bearing surfaces 910 bearing in a self-aligning bearing relation against the seat surface 53

  bearing formed on the base wall 530 of the flange 27.

  The keyway 571 of the bearing 71 is formed in one end of the latter, adjacent to the bearing surface 910 and is engaged in a position preventing rotation at least to a limited extent on the key 551 of the seat surface 53 of formed bearing

  on the flange 27 Although the cooperation of the

  vette 551 and the keyway 571 provides support for the bearing 71 against the seat surface 53 provided for receiving it which prevents rotation, at least to a limited extent, such cooperation of the key and the keyway allows effectively a desirable degree of self-aligning movement of the partially spherical bearing surface 910 of the bearing 71 on the seat 53 intended to receive it formed in the

  We can note that the spaced relation, predeter-

  mined above between the legs 41, 41 has tie rods 37 and the side walls 59, 59 has openings 29, 29 a formed in the flanges 27, 27 a contributes to ensuring sufficient automatic alignment of the bearings 71, 71 a associated with the flanges and carrying the shaft 43 in rotation to guarantee the uniformity of the air gap formed between the bore 35 of the stator and the rotor 47 as well as the

  free rotation of the rotating assembly 25 in the assembly

  ble ble 23. The feed bit 813 is in contact with lubricant application against a region of the end part 45 of the shaft rotatably mounted in the bore 73 of the bearing 71 and in support of lubricant transfer against lubricant storage wick material 815 The feeding wick 813 can be made of a material, such as felt, and the lubricant storage wick material 815 can be

  made up of a material, such as absorbent wool

  bante or the product "GE Lube" which can be obtained from the company General Electric Company, Fort Wayne, Indiana (UAE) The bearing 71, the feed bit 813 and the

  815 lubricant storage wick material are available

  placed inside a boot 817 which is an organ

  open-ended bowl-shaped having an end

  mite fixed around the boss 51 of the flange 27.

  In FIG. 17 to which reference will be made, another lubrication and bearing assembly 201 has been represented. This assembly comprises on the whole the same elements which operate in approximately the same manner as that described above but with the

following exceptions.

  The end plate 213 can, if desired, be the same as the end plate 27 and a sealed bearing, such as a ball bearing 255, has an outer bearing ring 217 received in an arrangement of support preventing any rotation

  inside a 287 shoemaker and a roll ring

  inside received around the end part 45 of the shaft so as to rotate jointly with the shaft when the machine is energized

  dynamo-electric 21 In this other set, the bol-

  tier 287 is approximately similar to bootmaker 817

  with the exception that the housing 287 is diametrically

  very stepped and that the outer rolling ring 217 of the bearing is axially retained in abutment between a part of the end wall 530 of the boss 51 of the flange 213 and an end flange of the shoemaker 287

  formed opposite the end wall 530 The flange of ex-

  opposite end may have an airtight bearing

  similar associated in the same way with the part of ex-

  end 45 a of the shaft and the stop devices 97, 97 a can be associated in the same way with the inner bearing rings of the hermetic-mounted bearings

  in the opposite end flanges.

  The stator 33 has two opposite end faces 77, 77a connected together by a surface

  peripheral 79 to which the tie rods 37 are fixed.

  The bore 35 of the stator 33 intersects the end faces

  miter 77, 77 a and a series of notches 81 are also formed and intersect both the bore of the stator and the end faces of the stator Windings 83, such as a series of turns or coils of conductors,

  are mounted in the notches 81, adequate insulation

  required being arranged between them, and the windings comprising two groups of opposite end turns of generally annular shape or coil heads 85, 85 a arranged around the bore of the stator 35 in the vicinity

  respective end faces 77, 77 a of the stator.

  To assemble the dynamo-electric machine 21, the flange 27 is placed or oriented in an assembly position on a positioning seat 87 provided

  on a lower assembly device 89 of an appliance

  reil 91 designed to assemble the dynamo machine

  electric, as more particularly shown in FIGS. 2 and 10 to 13 When the flange 27 is placed on the positioning seat 87, shown in FIG. 2, an opening 93 for positioning or orientation formed in the flange is threaded on or received around a positioning or orientation finger 95 disposed in a predetermined manner on the lower assembly device 89 relative to the positioning seat of the latter Thus, when

  the flange 27 is thus disposed in its pre-

  read on the positioning seat and the finger 95 extends through the positioning opening 93 formed in the flange, the flange is disposed in its assembly position relative to the device

  lower assembly 89 for subsequent assembly

  laughing with other parts of the dynamo machine

electric 21.

  Two devices absorbing the thrust loads, such as stop collars 97, 97 a are assembled around the opposite end parts 45 and, respectively, 45 a of the shaft 43 A pressure spring 99 is biased between a part or end face of the rotor 47 and the stop collar 97 which is slidably mounted on the end part 45 of the shaft while the stop collar 97 a is fixed in clamping support around the end part 45 a of the shaft It is possible to assemble the stop collars 97, 97 a and of the pressure spring 99 on the shaft 43 either before or after, or even more generally at the same time as one puts in position the flange-27, as described above, on the positioning seat 87. The end part is then inserted or inserted

  of the shaft in the bore 73 of the bearing 71 of the

  seems lubrication and bearing 69 carried by the flange 27 and also through the orifice 31 of the latter and the stop collar 97 is moved in abutment against the thrust load support surface 75 of the bearing, as more particularly shown on FIG. 3 The stop collar 97 thus being in abutment against the bearing 71, the end part 45 of the shaft is pushed more completely into the bore 73 of the bearing and into the central opening 31 of the flange 27 until so that it comes into support for guiding and positioning in a positioning recess, such as the sleeve 101 disposed in the lower assembly arrangement 89 In response to this further movement of the end portion 45 of the shaft in the positioning recess 101, the spring of

  pressure 99 is compressed in a jail layout-

  born or caged between the rotor 47 and the stop collar

  97 pressing against the bearing 71 When the ex-

  end 45 of the shaft is thus received in the positioning recess 101, it can be noted that the assembly

  turn 25 is then placed in a preset position

  position or assembly position relative to the flange 27 disposed on the positioning seat 87 and that, in this assembly position, the axis of rotation of the rotary assembly is arranged to coincide

  approximately with an assembly axis A of the device

* lower assembly point 89, that is to say it is approximately perpendicular to the positioning seat 87 of the lower assembly device and to the flange 27 placed in its determined assembly position

on the device.

  A locking or blocking mechanism 103 associated with the lower assembly device 89 can be operated by suitable means, as described in more detail below, so as to place its plunger 105 in restraint or blocking support against a region of the end part 45 of the shaft situated inside the positioning recess 101 In this way, when the plunger 105 of the locking mechanism 103 is in its retaining position in abutment against the part end 45 of the shaft, the rotary assembly 25 is retained in its assembled position against a movement of displacement in response to the compression force of the pressure spring 99 which acts on it,

  as more particularly shown in FIG. 4.

  In other words, the coming into blocking support of the plunger 105 against the end part 45 of the shaft located in the positioning recess 101 serves to retain the compression spring 99 trapped or caged in its state compressed between the rotor 47 and the stop collar 97 pushed back against the stop surface 75 of the bearing 71 and the engagement of the pressure spring 99 by the locking mechanism 103 retains the

  end of the shaft against a displacement

  ment out of the positioning recess so as to keep the rotating assembly 25 in its assembled position. The rotating assembly 25 is thus maintained in its preselected position by the locking mechanism 103, as described above, it is possible to introduce or deploy a series of wedges 107 through a series of wedge openings or passages 109 provided for this purpose. end through the lower assembly device 89 and also through the ventilation openings 55 formed in the flange 27 which are aligned with the shim openings and the shims are thus positioned or placed approximately around the surface

  peripheral 79 of rotor 47, as more particular-

ment shown in Figure 5.

  When the shims 107 are thus arranged around the peripheral surface 79 of the rotor, as described above, the bore 35 of the stator 33 can be placed or aligned around the peripheral surface of the rotor with the shims extending in abutment. spacing adjustment between them so as to create or establish a

  predetermined way the approximately uniform air gap

  desired shape between the stator bore and the peri-surface

  of the rotor, as more particularly represented in FIG. 6 Although it is preferable that

  the bore 35 of the stator 33 is axially perpendicular to

  the opposite end faces of the stator, such bores may, in some stators, be slightly

  inclined relative to the end faces of the stator.

  However, even if the bore 35 of the stator 33 is inclined, the arrangement of the shims 107 in adjustment support between the bore of the stator and the peripheral surface 79 of the

  rotor 47 serves, at least in part, to ensure the establishment

  approximately uniform air gap between them.

  In general, when the bore 35 of the stator is arranged around the rotor 47 and shims 107,

  as described above, the tabs 41 provided on the sides

  end ties 39 are threaded or inserted at least -

  partly through the openings of the flange 27 then

  that the flange is placed in its preselected position

  fitted on seat 87 of the lower assembly device

  laughing 89 It should be noted that the side walls 59, 59 has openings 29, 29 a are dimensioned in a way

  predetermined so as to be in a predetermined way

  born larger than the legs 41 and 41 a which are respectively received there, as more particularly shown in Figures 7 and 8 Thus, when the legs 41 are received in the openings 29 of the flange 27, the legs are placed in a spaced arrangement predetermined side walls 59 of the respective openings It should also be noted that, even if

  the bore 35 of the stator 33 is slightly inclined when

  that it is arranged around the rotor 47 with the shims 107 in support of spacing adjustment between them, as previously described, the predetermined sizes

  tabs 41, 41 a and openings 29, 29 have for

  blurring the spacing relationship between them serves to

  put to make up such an inclination of the bore of the stator.

  It sometimes happens that, as a result of technical-

  defective manufacturing and / or handling,

  thermal contraction and / or thermal expansion

  mique of the material in which the flanges are made, the flanges 27, 27 a warp or otherwise deform out of their desired configuration In such cases, it should also be noted that the predetermined dimensions of the legs 41, 41 a and openings 29, 29 a so as to establish the predetermined spacing relationship between them also serve to compensate for such warping. Consequently, the predetermined spacing relationship between the tabs 41 and the side walls 59 of the openings 29, when the legs are received there, as described above, serves not only to compensate for an undesirable inclination of the bore 35 of the stator 33 but also an undesirable warping of the flange 29 during the assembly of the

dynamo-electric machine 21.

  Two series of stop surfaces 111, lila, oriented in opposite directions, are formed on the opposite end parts 39, 39 to tie rods 37 and

  the legs 41, 41 a extend approximately axially-

  from the respective abutment surfaces, such as

  more particularly shown in FIGS. 1 and 8.

  Thus, when the tabs 41 of the tie rods are introduced

  tes in the openings 29 of the flange 27 and that the rela-

  tion of the aforementioned predetermined spacing is established between them, as previously described, an abutment surface 111 of at least one of the tie rods 37 rests against a seat surface 67 facing each other, provided for the

25312 L 84

  receive on the flange 27 at least approximately in the vicinity of the opening in which the lug of this single tie or these tie rods is received Naturally, if the bore 35 of the stator is not inclined in an undesirable manner and if the flange 27 is not undesirably warped, the abutment surface 111 of each tie rod bears against the seat surface 67, opposite the flange 27, designed to receive it at least approximately in the vicinity of the opening 29 of said flange In the case where one of the opposite lateral edges of certain tabs 41 abuts against a

  part opposite the side walls 59 of the openings

  res when inserting the tabs into the openings

  res, the stator 33 and the tie rods can be adjusted or rotated together approximately around the peripheral surface 79 of the rotor 47 so as to space the lateral edges of the tabs and the

  parts opposite the side walls 59 of the openings

  tures 29 of flange 27, as more particularly

shown in figure 7.

  After the tabs 41 and the abutment surfaces 111 of the tie rods 37 have thus been arranged with respect to the openings 29 and to the seat surfaces 67 of the flange 27, as described above, the assembly or other adaptation is made. bore 73 a of bearing 71 a

  of the lubrication and bearing assembly 69 has flas-

  that 27 a, on the end part 45 a of the shaft 43,

  as more particularly shown in FIG. 9.

  When the bore 73 a of the bearing has thus been received around the end part 45 a of the shaft, the flange 27 a is moved so as to thread its openings 29 a on the legs 41 a formed on the parts d end 39 a

  tie rods 37 in such a way that the side walls

  the 59 has openings 29 a are placed in a dis-

  spaced position of the legs 4 la in the same manner as described above with reference to the legs 41 and to the openings 29 of the flange 27 This downward movement of the flange 27 a ends when the stop surfaces Illa of at least two tie rods 37 bear against the seat surfaces 67 a vis-à-vis formed

  on the flange 27 has at least approximately in the vicinity

  swings openings 29 a in which the legs 41

  are received in order to define a preset position

  tioned or assembly position of the flange Thus, when the legs 41 a are received in the openings 29 a of the flange 27 a, as described above, the legs

  are arranged in a predetermined relationship with respect to

  side wall port 59 has respective openings

  In this case also, it should be noted that even if the bore 35 of the stator 33 is inclined in an undesirable manner when it is placed around the rotor 47 with the shims 107 in adjustment support between them and even if the flange 27 a has undesirable warping, the predetermined dimensions of the legs 41 a and

  openings 29a, so as to establish in a prede-

  ended the spacing relationship between them, serve to catch not only the undesirable inclination or obliquity of the bore 35 of the stator but also the undesirable warping of the flange 27 a Naturally, if the bore 35 of the stator 33 does not have a obliquity

  undesirable and if the flange 27 a does not have a left

  undesirable shifting, the abutment surfaces 11 la of

  all tie rods 37 come to bear against the over-

  seat faces 67 a vis-à-vis provided on the flange 27 a to receive them, at least approximately in the vicinity of the openings 29 a of the flange In the case where one of the lateral edges of the legs 41 a abuts against a part opposite the side walls 59 has openings 29 a, when the tabs are received in these openings, the flange 27 a can be adjusted or rotated as a whole around the part of the bore 73 a of the bearing 71 a bears against the end part 45 a of the shaft so as to space the lateral edges of the legs of the parts facing the side walls of the respective openings of the flange 27 a. When the flange 27 a is placed in its assembled position, as described above, it is possible to

  operate or move an upper assembly device

  retractable laughter 113 of the device 91 downwards towards the flange 27 a in order to apply against the latter a set of elastic means, such as, for example, coil springs 115 or the like, worn

  by the upper assembly device and which exer-

  cent on the flange a biasing force When the elastic means or springs 115 are pressed against the flange 27 a, the compression forces of the springs

  push the flange back to its hand-assembled position

  holding the spacing relationship between the openings 29a of the flange and the tabs 4 la of the tie rods 37 At this time, the locking mechanism can be released 103 so as to remove the retaining support between the plunger 105 of the locking mechanism and the end part 45 of the shaft 43 which is received in the positioning recess 101 of the interior assembly device 89, blocking which, as previously mentioned, served to

  maintain the rotating assembly 25 in its assembled position

  against the compression force of the caged pressure spring 99 Therefore, when the force

  dje retainer of blocking plunger 105 ceases to be applied

  quée at the end portion 45 of the shaft, the compression force of the pressure spring 99 is used to move

  the assembly rotating upwards relative to the flas-

  ques 27, 27 a and stator 33 kept in their posi-

  tion assembled Following this upward movement of the rotating assembly 25 in response to the compression force of the pressure spring 99, the rotor 47 is returned to position by sliding inside the bore 35 of the stator 33 on wedges 107 interposed

  between them and the upward movement ends when

  that the stop collar 97 has mounted on the end part 45 a of the shaft 43 bears against the thrust support surface of the bearing 71 a of the lubrication and bearing assembly 69 a of the flange 27 a From this

  way, the axial play is ensured in the dynamo machine

  electric 21 by the pressure spring 99 which pushes the collars 97, 97 a into abutment against the respective thrust support surfaces 75, 75 a of the brackets 71, 71 a, as described above; however, it should be noted that the compression forces of the springs 115 mounted on the upper assembly device 113 are greater, in a predetermined manner, than that of the pressure spring 99 so as to ensure that the flange 27 has n ' is not displaced from its assembled position on the tie rods 37 when the compression force of the spring

  pressure is exerted against the flange by means of

  support bearing diary 71 a against surface 53 a

flange bearing seat.

  As shown in FIG. 9 and as more particularly represented in FIGS. 11, 13 and 14, two series of welding means 117, 117 a are provided for approximately simultaneously welding the flanges 27, 27 a at least approximately in the vicinity of the side walls. 59, 59 has openings 29, 29 a-formed in the flanges, with legs 41, 41 a formed on the opposite end portions 39, 39 has tie rods 37 and which extend through the respective openings, as more particularly shown in Figures 7 and 8 Two series of welds 119, 119 a thus created by the welding means extend across at least a portion of the space established in a predetermined manner between the legs 41, 41 a and the side walls 59, 59 has respective openings so as to secure the flanges against displacement relative to

  at the opposite ends of the tie rods when the flas-

  ques and stator 33 are in their assembly positions

  respective wiring The welding means 117 are mon-

  tees so as to be able to be moved in extension and retraction on the lower assembly device 89 with respect to preset welding positions of said means and the upper welding means 117 a are carried by the upper assembly device 113 so to be able to be moved together with it to preset welding positions, as is

  will describe below in more detail.

  After welding of the flanges 27, 27 a and tie rods 37, the shims 107 are removed through the ventilation holes 55 of the flange 27 and the shim passages 109

  of the positioning seat 87 of the assembly device

  lower wiring 89 so as to remove them from their posi-

  in support of spacing adjustment between the bore

  of the stator and the peripheral surface 79 of the rotor.

  Thus, following the retraction of the shims 107, it should be noted that the above-mentioned approximately uniform air gap established by the shims 107 between the bore 35 of the

  stator and the peripheral surface 79 of the rotor is main-

  held by the welded assembly of the flanges 27, 27 a and of the tie rods 37 of the stator 33 since not only the undesirable obliquity of the bore of the stator but also the undesirable warping of the flanges is caught up by this method of assembly the dynamoelectric machine 21, as previously described For

  complete the description of this method of assembling the

  dynamo-electric machine 21, it will be noted that then the upper assembly device 113 is retracted upwards, which separates its springs 115 from the flange 27 a and we can then remove the dynamoelectric machine from the device 91 by moving the flange 27 and the end part 45 of the shaft of the positioning seat

  87 and the positioning recess 101 of the device

  tif of the lower assembly 89. Referring again to the drawings as a whole and taking up and summarizing at least in part the

  above description, it will be indicated that the device 91

  is designed to be used to fix the tie rods 37 of the assembly

  fixed line 23 of the dynamo-electric machine 21 at -

  flanges 27, 27 a of this machine, the tie rods being provided with lugs 41, 41 a at their opposite ends 39, 39 a and the flanges being provided with openings which pass through them 29, 29 a which are predetermined in size larger the respective tabs (Figures 1- 14) Means, such as the positioning seat 87, are provided on the lower assembly device 89 for positioning the flange 27 with an end portion 39 of at least minus one of the tie rods 37 pressing against it and with the legs 41 placed in

  the openings 29 of the flange in a space arrangement

  created in a predetermined manner with respect to the respective openings (FIGS. 2, 7, 8, 11 and 15) Elastic means, such as the springs 115 of the upper assembly device 113, are provided to urge the flange 27 a to bear against the opposite end portions 39 a of at least two of the tie rods 37, the lugs 41 a of these opposite end portions 39 a of tie rods being received in the openings 29 a of the flange 27 a and

  placed in a predetermined manner in an arrangement

  tion spaced from the respective openings (Figures 7-9 and 13) Welding means 117, 117 a are provided for welding the lugs 41, 41 a approximately simultaneously to a portion of the flanges 27, 27 a at least approximately in the vicinity of the openings 29, 29a when the tabs and the openings are in a spaced relative arrangement (Figures 7-9 and

11-13).

  More particularly and as shown more specifically in FIGS. 10-13 to which reference will be made, the apparatus 91 comprises a work station which comprises a frame or chassis 131 which comprises a base plate or lower transverse sole 133, a plate or sole transverse midsection 135 and an upper transverse plate or sole 137 which

  are respectively fixed to the frame by appropriate means

  prayed as more particularly represented on the

figure 10.

  The lower assembly device 89 is

  located approximately in the center of the inter-

  135 of the device 91 to which it is fixed by appropriate means (not shown) and this assembly device extends through an opening 139 formed to receive it in the intermediate plate as more

  particularly shown in Figures II and 12.

  The above-mentioned welding means 117 comprise a set of

  ble of four torches 141 of needle arc welding

  plasma ones which are mounted respectively sliding

  on rods or guide bars 143 fixed to the plate

  that intermediate around the lower assembly device

  laughing machine 89 and the torches are assembled so as to be moved in reciprocating movements together with piston rods or respective driving rods 145-of a set of actuating means, such as, for example, servomotors 147 or the like

  which can be of the hydraulic or pneumatic motor type

  as double acting Thus, following the actuation of the servomotors or actuators 147 i the torches 141 are moved from a retracted or rest position on the guide bars 143 towards their preselected welding position or deployed position ,

  as represented by their outline in inter-

  broken in FIG. 12, in which they are adjacent to the lower assembly device 89 to form approximately simultaneously welds 119 which assemble the flange 27 to the lugs 41 of the tie rods 37, as previously described and as shown in FIGS. 7 to 9. 141 torches can be obtained from the Linde Division at Union Carbide Corp.

  Chicago, Illinois (USA) under model number 997450.

  Although the welding means 117 and the torches 141 have been shown here for the purposes of the disclosure, it is envisaged that welding means may be used

  various other types without departing from the scope of the invention

  tion and in a way to achieve at least

some of its goals.

  The blocking or locking mechanism 103 also comprises operating means such as, for example, a servomotor 149 or the like which may be of the pneumatic or hydraulic double-acting type and the operating means or servomotors 149 are mounted using appropriate means on the intermediate plate of the device 91, generally adjacent to the lower assembly device 89 carried by this plate, as more particularly shown in FIGS. 4 and 11 The plunger 105 of the locking mechanism 103 can slide back and forth in a passage, such as, for example, a groove or slot 151 or the like,

  provided for this purpose in the lower assembly device

  laughing 89 and which intersects or enters the sleeve of

  setting in position 101 of this device, as more

  particularly shown in Figures 4 and 11

  locking block 105 is assembled to the piston rod or

  drive rod 153 of servo motor 149 so as to move

  cer jointly with it Thus, when the servomotor 149 is maneuvered, the plunger 105 of the blocking or locking mechanism 105 is deployed and retracted

  between a rest position, such as more particularly

  rement shown in Figure 11, and a deployed or actuated position, as more particularly shown in Figure 4 Naturally, in its deployed position, the plunger 105 is supported in a retaining arrangement against the end portion of the rotating assembly shaft 25 received in the

  sleeve for positioning the assembly device 101

  lower block, as previously described and as

  more particularly shown in FIG. 4.

  As more particularly shown in FIGS. 10 to 12, other maneuvering means, such as, for example, a servomotor 155 or the like which may be of the pneumatic or hydraulic double-acting type, are mounted using suitable means. on the base plate 133 of the apparatus 91 and comprise a piston rod or drive rod 157 movable back and forth which is connected to means, such as a mechanism 159 for guiding or supporting the shims, by example, and which carries two cylinders or sleeves 161, 163 disposed approximately concentrically used to carry the wedges 107 and which are connected by suitable means to the piston rod 157 of the actuator 155 so as to move together with it going back and forth The outer shim support sleeve 161 is received and guided by sliding in a bore formed approximately axially or vertically to receive it in the

  lower end part of the assembly device

  lower block 89, and the inner shim support sleeve 163 is received and guided by sliding on a guide rod 167 carried by the assembly device

  lower and extending approximately concentric-

  ment in the bore of the lower assembly device down from said device towards the base plate'133 of the apparatus 91 The lower end parts of the shims 107 are received between the sleeves 161, 163 supports of shims and the upper end parts of the shims are slidably received in the shim passages 109 provided for this purpose in the lower assembly device 89 Quick-dismounting means, such as, for example, a series of latches 169 or the like are mounted on the outer shim support sleeve 161 so as to come

  in a hanging and positioning arrangement

  tion of the shims 107 so as to facilitate rapid disassembly of the latter each time it is necessary to change them. Thus, following the operation of the servomotor 155, the mechanism 159 for operating the shims and the shims 107 are jointly moved. upwards from a retracted or rest position, as more particularly shown in FIG. 12, to a deployed or actuated position so as to control the upward movement of the wedges 107 through the passages 109 of shim formed in the lower assembly device 89 so as to place the shims around the peripheral surface 79 of the rotor 47, as previously described and as more

  particularly shown in Figures 5 and 12.

  The upper assembly device 118

  comprises a support plate 171, the part of which approximately

  matively central 173 is fixed by appropriate means

  required at the end of the piston rod or rod

  motor 175 moving back and forth from another action-

  neur such as, for example, a servo motor 177 or the like

  which may be of the pneumatic or hydraulic double-acting type, and the actuator or servomotor 177 is, in turn, fixed by suitable means to the upper transverse plate 137 of the frame 131 of the apparatus 91, as more particularly shown in the figures, 13 and 14 A series of arms 179 are formed in one piece with the support plate 171 and extend approximately radially from the central part 173 of this support plate and the means of

  welding 117 a are rigidly fixed by means -

  suitable for the upper faces of the respective arms of

  the support plate The welding means 117 a comprise

  another series of four plasma needle arc welding torches 181, which are, overall,

  similar to the welding torches 141 described above

  above and the nozzles of the torches 181 extend to

  through a series of openings 183 provided for receptions

  see in preselected locations in the central part 173 of the support plate 171 The springs 115 are carried by a series of retaining members 185 provided

  for this purpose fixed to the support plate 171 in the assembly

  ble in the vicinity of the central part 173 and extending below its lower face Thus, during the

  actuation of the actuator or servomotor 177, the provision

  sitive upper assembly 113 is moved or deployed from a retracted or rest position, as shown in Figures 10 and 18 down towards the lower assembly device 89 carried by the transverse plate 135 of the 91 to

  a deployed or actuated position such that more

  particularly shown in Figure 9 Following

  this movement of extension or deployment of the device

  tif of upper assembly 113 to its position

  activated, the springs 115 carried by the lower face

  upper assembly device are

  pushed back against the flange 27 a and the chalu-

  welds are placed in a predetermined way

  born to form the welds 119 a which assemble the

  flange 27 has legs 41 has beams 37, as above

  as described and as shown in Figures 7 to 9.

Claims (34)

  1 Method for fixing a series of tie rods   (37) of a fixed assembly (23) of a dynamo machine   electric (21) with two end flanges (27, 27 a) of said machine, respective lugs (41, 41 a) extending from the opposite ends (39, 39 a) of the tie rods while each of the flanges comprises a series of openings (29, 29 a) which pass through it, the   openings being sized in a predetermined manner   born larger than the legs, this process being characteristic   characterized in that it consists in: placing the tabs (41, 41 a) situated at the opposite ends of the beams (37) at least partly inside the respective openings (29, 29 a) formed in the flanges (27 , 27 a) and to space the tabs of the side walls (59, 59 a) of the openings; and approximately simultaneously weld at least a part of the flanges adjacent to the respective openings to at least a part of each of the legs who are housed there.   2 The method of claim 1, wherein the legs (41, 41 a) extend from respective seats (111, lla) formed on the opposite end portions (39, 39 a) of the tie rods (37) and the   side walls (59, 59 a) of the openings (29, 29 a) -   intersect the opposite faces (61, 63, 61 a, 63 a) of   respective flanges, the method being further characterized   laughed in that it comprises the steps which consist in: placing at least one of the opposite seats (111, illa) of at least one of the tie rods (37) in abutment against one (61) of the faces opposite of a first of the flanges (27); rotating the tie rods together with respect to the first flange and causing the tabs 141) formed on the corresponding ends (39) of the tie rods to be spaced from the side walls (59) of the openings (29) of the first flange; place the second openings (29 a)   flange (27 a) as a whole around the respective legs   tives (41 a) formed at opposite ends (39 a) of the respective tie rods; bringing the opposite seats (11a) from at least two of the tie rods in abutment against one (61a) of the opposite faces of the second flange; and rotating the second flange around the opposite seats (illa) of said two tie rods and ensuring that the side walls (59a) of the openings (29a)   of the second flange (27 a) are spaced from the forelegs   mées on the second ends (39 a) of the tie rods (37).   3 Method for fixing a series of tie rods   (37) mounted on the stator (33) of a dynamo machine   electric (21) with two opposite end flanges (27, 27 a) to ensure the alignment of a bore (35) formed in the stator around a preselected axis in the case where the bore of the stator is oblique , each of the tie rods having two opposite ends (39, 39 a) from which extend two opposite tabs (41, 41 a), each of the flanges comprising a series of openings (29, 29 a) which pass through it, side walls (59, 59 a) of the openings being dimensioned in a predetermined way larger than the tabs formed on the opposite ends of the tie rods, this method being characterized in that it consists in: placing the tabs (41) formed on one of the opposite ends of the tie rods (37) at least partially in the openings (29) of a first flange (27) and to jointly incline the tie rods and their tabs located in said openings to compensate   any obliquity of the bore (35) of the stator and effect   kill its alignment around said preselected axis; adjust the tie rods together so as to ensure that the tabs carried by said end (39) of the tie rods are spaced from the side walls (59) of the respective openings (29) of the first flange while maintaining the alignment of the stator bore around the preselected axis;   o place the openings (29 a) of the second flas-   that (27 a) as a whole around the legs (41 a) form   mées at the second ends (39 a) of the tie rods (37) and to adjust the second flange so as to ensure that the side walls (59 a) of the openings (29 a) of the other flange (27 a) are spaced from the legs respective (41 a); and   weld the flanges at least approximately-   at least in the vicinity of the openings formed therein at least part of each of the tabs arranged in the respective openings.   4 Method for assembling a dynamo machine   electric (21) having a fixed assembly (23) and a set   rotating beam (25), the fixed assembly comprising two flas-   opposite end ques (27, 27 a) crossed by respective series of openings (29, 29 a), a stator (33) and a series of tie rods (37) fixed to the stator, the opposite ends (39, 39 a) tie rods being provided with respective lugs (41, 41 a) which extend in opposite directions; and the rotating assembly comprising a rotor (47) fixed to a shaft (43) between the parts   opposite ends (45, 45 a) of the latter, this pro-   assigned being characterized in that it consists of:   place a first flange (27) and the whole   wheat rotating (25) approximately in positions   preselected so that one of the end parts   the shaft of the tree extends through an approximately central opening (31) formed in the flange; align a bore (35) of the stator (33) with   less in part around the rotor to delimit a   iron between them; receiving the tabs (41) located at a first end of the tie rods (37) in the respective openings (29> of the series of openings formed in the flange placed in position (27); arranging the openings (29 a) of the series openings formed in the second flange (27a) approximately around the tabs (41a) located at the second ends of the tie rods; and   weld the flanges at least approximately-   lying in the vicinity of the respective series of openings to at least part of each of the tabs housed in the respective openings.   5 Method according to claim 4, character-   laughed at in that it comprises, in addition, the step which consists in supporting the first end of at least one   tie rods against the flange in position (27> when-   that the tabs (41) located at the first ends of the   tie rods are received in the respective openings.   6 Method according to any one of the res-   dications 4 and 5, characterized in that the second   ends of at least two of the tie rods (37) bearing against the other flange (27 a) when the tabs (41 a) formed on the second ends of the tie rods are   arranged in the respective openings (29 a).   7 Method according to any one of the res-   dications 4 to 6, characterized in that it comprises, in   in addition, the step which consists in blocking the rotational assembly   tif (25) in its preselected position.   8 Method according to claim 7, charac-   in that it further comprises the step of unlocking the rotating assembly (25) and   resiliently move to another preset position.   selected with respect to the bore (36) of the stator (33)   and to the flanges (27, 27 a) before the welding of the flanges.   9 Method according to claim 4, character-   laughed in that the second flange (27 a) is biased in one direction to ensure that it comes to bear against said second ends of at least two of the tie rods   (37) before welding the flanges.   Method according to claim 4, character-   laughed in that the openings (29, 29 a) are dimension-   born in a predetermined manner larger than the respective lugs (41, 41 a) and in that the lugs (41) formed on the first ends (39) of the tie rods are placed in a spaced arrangement relative to the corresponding openings when they are placed there.   11 The method of claim 10, character-   laughed at in that the legs (41a) formed on the seconds   ends (39a) of the tie rods are placed in the assembly   ble in an arrangement spaced apart from the openings   corresponding tures (29 a) when these openings are placed around them.   12 Method according to claim 4, character-   laughed in that the alignment step consists in placing a series of shims (107) approximately around the   rotor (47) of the rotary assembly (25) and to be placed -   the bore (35) of the stator (33) around the rotor and of the series of shims, the series of shims being supported between the rotor and the bore of the stator so as to define the air gap between them.   13 Method for assembling a dynamo machine   -30 electric (21) having a fixed assembly (23) and a set   ble tournable (25), the fixed assembly comprising two flas-   opposite end ques (27, 27 a) which comprise two series of through openings (29, 29 a), at least one first of the flanges comprising an orifice (31) approximately central spaced from said openings, a stator (33), a series of tie rods (37) fixed to the   stator, each of the tie rods having two end parts   opposite mites (39, 39 a) from which extend two legs (41, 41 a) oriented in opposite directions, the rotating assembly comprising a shaft (43) having two opposite end portions (45, 45 a ) and   a rotor (47) fixed to the shaft between the end parts   opposite mites, this process being characterized in that it consists in:   place the first flange (27) approximately   in a preselected position; placing the rotary assembly (25) in a preselected position relative to the first flange and so that one (45) of the end parts of the shaft extends through the central orifice (31) of the first flaccid; o lock the rotary assembly in its preselected position; o align the stator (33) around the rotor (47) to define an air gap between them; placing the tabs (41) of a first of the opposite end parts of the tie rods (37) at least partly in that of the pairs of openings (29) which is formed in the first end flange; bringing a first end of at least one of the tie rods (37) into abutment against the first flange; position the second series of openings (29 a) of the second flange approximately around the   tabs (41 a) formed on the second end parts   mite (39 a) tie rods; bring the opposite ends of the   minus two of the tie rods in abutment against the second flange   that (27 a); o exert a force on the second flange urging it towards the arrangement in abutment against the second ends of the two tie rods; and o welding the flanges approximately simultaneously at least approximately in the vicinity of the series of openings (29, 29 a) which are formed therein at least to a part of each of the tabs (41, 41 a) formed on the opposite end parts tie rods   and arranged in the respective series of openings.   14 The method of claim 13, charac-   terized in that the series of openings (29, 29 a) are delimited by side walls (59, 59 a) in the   flanges (27, 27 a), the side walls being dimen-   predefined larger than the legs (41, 41 a) formed on the opposite end portions of the tie rods (37) and in that the first step of positioning consists in placing the formed legs (41) on the first end portions (39) of   tie rods in a predetermined manner in a provision   spaced apart from the side walls (59) of the series   openings formed in the first flange (27).   Process according to claim 14, charac-   terized in that the second positioning step consists in placing the tabs (41 a) formed on the second end parts (39 a) of the tie rods (37) in a predetermined manner in a spaced arrangement   side walls (59a) of the second series of openers   tures (29 a) formed in the second flange (27 a).   16 The method of claim 13, charac-   characterized in that the alignment step comprises the step which consists in introducing a series of shims (107) between the rotor (47) and the stator (33) so as to define the air gap between them.   17 The method of claim 13, charac-   characterized in that it comprises the intermediate step which consists in unlocking the rotating assembly (25) and in - 2531284   move relative to the fixed assembly (23) to another preselected position, before the welding step.   18 Process for assembling a dynamo machine   electric (21) having a fixed assembly (23) which comprises first and second opposite end flanges (27, 27 a) with which are associated first and second bearings (71, 71 a) respectively, first and second surfaces of stop (75, -75 a) being respectively formed on the first and second bearings, at least the first end flange (27) being traversed by a   orifice (31) approximately central aligned approxi-   matively coaxially with the first bearing (71), first and second series of openings (29, 29 a) extending approximately axially through the first and second flanges, a stator (33) traversed by a bore (35) approximately axial, a series of tie rods (37) fixed to the stator, the tie rods having first and second opposite end parts (39, 39 a) of the first and second legs (41, 41 a) extending approximately axially respectively   from the first and second ends   opposite half of the tie rods, the dynamo-electric machine also comprising a rotating assembly (25) which comprises a shaft (43) having first and second opposite end parts (45, 45 a), a rotor (47) fixed to the 'shaft between the first and second end parts of said shaft, a first stop collar (97), a pressure spring (99) and a second stop collar (97 a) fixed on the second end part (45 a) of the tree, the process being characterized in that it consists in:   place the first flange (27) approximately   tively in a preselected position; place the first stop collar (97) and the pressure spring (99) on the first end part (45) of the shaft with the pressure spring trapped between the first stop collar and a   part of the rotor (47) at least in the vicinity of the first   first end of the tree; introduce the first end part   of the shaft through the first bearing (71) and through   towards the orifice (31) formed in the first flange (27).   bringing the first end collar disposed on the first part of the shaft to bear against the first abutment surface (75) formed on the first bearing; further move the first end portion of the shaft through the first bearing and   the orifice formed in the first flange towards a posi-   preselected with respect to these; compressing the pressure spring between the rotor and the first stop collar bearing against the first stop surface formed on the first bearing when the first end part of the shaft is moved to its preselected position; locking the first end portion of the shaft in its preselected position;   place a series of shims (107) approximately   tively around the rotor (47); arrange the bore (35) of the stator (33) approximately around the rotor and the series of shims with the series of shims in an arrangement of spacing adjustment between them; -   penetrate the first tabs (41) formed on the first end parts (39) of the tie rods (37) at least partly in the first openings (29) formed in the first flange (27) in the whole during placing the stttor bore around the rotor and the series of shims; sit the first end of at least one of the tie rods against the first flange after having made the first legs of the tie rods penetrate at least partially into the first openings of the first flange; simultaneously adjusting the stator and the tie rods relative to the first flange so as to place the first legs in an arrangement spaced from the respective first openings of the first flange; introducing the second end part (45 a) of the shaft (43) into the second bearing (71 a) associated with the second flange (27 a); placing the second openings (29 a) formed in the second flange (27 a) approximately around the second tabs (4 la) formed on the second ends of the tie rods; seating the second ends of at least two of the tie rods against the second flange (27 a) during the positioning of the second openings of the latter around the second legs of the tie rods; adjusting the second flange relative to the tie rods so as to place the second openings formed in the second flange in a spaced arrangement relative to the respective second legs of the tie rods; elastically load the second flange relative to the tie rods thus arranged in the direction of the   second ends of the tie rods; -   o unlock the first end part (45) of the shaft; moving the first and second end portions of the shaft in the first and second bearings and also the rotor in the stator bore in response to the compression force of the pressure spring (99) following the release of the first end portion of the shaft; bringing the second stop collar (97 a) into abutment against the second stop surface (75 a) of the second bearing (71 a) associated with the second flange following the execution of the second displacement step; weld the first and second flanges approximately simultaneously at least approximately at the   neighborhood of each of the first and second open-   res formed therein at least part of each of the legs which extend at least partly in the first and second openings; and removing the series of shims (107) from their arrangement for adjusting the spacing between the rotor and the bore of the stator.   19 Procedure for assembling a dynamo machine   electric (26) and for cnpser, when it exists, the warping   ment of a stator (33) of the, supplied to compensate for the obliquity when it exists, of the bore (35) of two end flanges (27, 27 a) of the dynamo-electric machine, the stator also comprising a series of tie rods (37) which are fixed thereto, two series of legs (41, 41 a) extending in opposite directions being formed on the respectively opposite end parts (39, 39 a)   tie rods, the flanges comprising two series of openings   respective through tures (29, 29 a), the side walls (59, 59 a) of the openings being dimensioned in a predetermined manner larger than the corresponding tabs, this method being characterized in that it consists in:   put in position a first (27) flas-   end ques in an assembly position;   place one (41) of the series of legs   mées on the tie rods in that (29) of the series of openings   tures which are formed in the first flange in a relation spaced in a predetermined manner from the side walls (59) of the openings of said series avoiding any bracing contact between them and placing the axis of the bore ( 35) of the stator (33) approximately in alignment with a preselected assembly axis (A) relative to the preselected assembly position of the first flange so as to compensate for the obliquity of the stator bore and the warping of the first flange in the case where they exist, when the first flange is in its assembly position and the axis of the stator bore is aligned with the preselected assembly axis provided; associate the other end flange (27 a) in an assembly position relative to the stator <33) when the axis of the latter is aligned with the preselected assembly axis provided and to place the side walls ( 59 a) openings in the second series of openings (29a) spaced in a predetermined manner from the corresponding lugs of the second series of lugs (41a) formed in the tie rods avoiding any contact   bracing between them so as to compensate for the obli-   of the stator bore (35) and the warping of the other flange in the case where they exist, when the other flange is in its assembly position and the axis of the stator bore is aligned with the axis of the preselected assembly planned; and forming approximately simultaneously two series of welds (119, 119 a) which join the series of legs to the flanges at least approximately in the vicinity of the side walls of the series of openings and extend across the spaces formed between them in a manner predetermined, so as to maintain the assembly position of the flanges relative to the stator with the stator axis disposed approximately   coinciding with the preselected assembly axis.   20 Apparatus (91) for assembling a dynamo-electric machine (21) having a fixed assembly (23) and a rotating assembly (25), the fixed assembly comprising a stator (33) through which a bore (35) passes, a series tie rods (37) fixed to the stator, each tie rod having two opposite end portions (39, 39 a) which carry two legs (41, 41 a) extending in respectively opposite directions, two end flanges   opposites (27, 27 to) which have two series of openings   through through (29, 29 a), the openings being dimen-   in a predetermined manner larger than the corresponding legs and at least one first (27) of the flanges having a through orifice f 31)   approximately central, the rotating assembly includes   nant a shaft (43) having two opposite end parts   sées (45, 45 a) and a rotor (47) fixed to the shaft between the opposite end parts of the shaft, this apparatus, being characterized in that it comprises: support means (87) for carrying the first flange (27); means (95) provided on the support means for bearing against at least one part   (93) of the first flange in order to place it in the set   ble in a preselected position on the support means; means (101) forming a recess, associated with the support means for receiving that (45) of the opposite ends of the shaft which extends through the orifice (31) approximately central of the first   flange to align the rotating assembly (25) approxi-   matively along a preselected axis (A); means (105) designed to come into locking abutment against the end part (45) of the shaft   received in the recess means so as to hand-   hold the rotating assembly approximately aligned as follows   in front of the planned preselected axis; means (155-169) for advancing a series of shims (107) approximately around the   rotor (47) of the rotary assembly (25) when the latter   nier is approximately aligned along the pre-   lectionne expected, the shims being arranged between the rotor and the bore (35) of the stator (33) to establish between them a preselected air gap when positioning the bore of the stator around the series of shims and the rotor while the tabs (41) formed on one of the opposite end parts of the tie rods penetrate at least partially into the openings of the series of openings (29) formed in the first flange, in an arrangement spaced from the respective openings ;   means (113, 115) for urging elas-   tick the second flange (27 a) towards an arrangement in abutment against the second ends of at least two of the tie rods while the openings of the second series of openings (29 a) are generally arranged around the legs of the second series of legs (41 a) formed on the second end portions (39 a) of the tie rods, in an arrangement spaced from said legs; and two series of means (117, 117 a) for approximately simultaneously welding at least a part of each of the legs of the first and second series of legs to a part of the first or second flange at least in a location approximately adjacent to the opening corresponding to the first or second series of openings, while the legs   are located in their spaced arrangement.   21 Apparatus for fixing a series of tie rods (37) provided on a fixed assembly (23) of a dynamo-electric machine (21) with two opposite end flanges (27, 27 a) of said machine, the tie rods comprising two series of legs (41, 41 a) formed respectively on their opposite end portions   (39, 39 a) and the flanges comprising two series of openings   through vertices (29, 29 a) which are in a way   predetermined larger than the corresponding legs-   tes, apparatus characterized in that it comprises: means (87) for positioning one-first (29) of said flanges so that a first of the opposite ends of at least one of the   is in support against him, while a first   (41) legs formed on the opposite ends   the dimensions of each of the tie rods is received in each of the openings in the series of openings (29) formed in the first flange in an arrangement spaced apart from said opening; means (115) for urging the second end flange (27 a) to bear against the second ends of at least two of the tie rods, the second tabs (41 a) formed on these second ends of the tie rods being received in openings of the second series of openings (29a) formed in the second flange (27a) in an arrangement spaced from the corresponding openings; and   means (117, 117 a) for welding approximately   matively simultaneously at least a part of each of the first and second tabs at the first flange and at the second flange at least in locations approximately adjacent to each of the openings of the first series of openings and of the second series   openings, when the legs and series of openings   tures are in their spaced relative arrangement.   22 Apparatus according to claim 21, charac-   in that the positioning means include   nent a seat (87) on which the first flange (27) is oriented.   23 Apparatus according to claim 21, charac-   terized in that the positioning means comprise means (95) designed to cooperate with a part (93) of the first flange to ensure a preselected orientation of the first flange on the positioning means.   24 Apparatus according to claim 21, charac-   terized in that it comprises two assembly devices   wiring (89, 113) which respectively comprise the positioning means (87) and the biasing means (115), one (113) of the assembly devices being mobile relative to each other.   Apparatus according to claim 24, charac-   characterized in that the welding means (117, 117 a) comprise two series of welding torches (141,   181), the torches (181) of one of the series of lime-   solder welds being mounted on one (113) of the arrangements   assembly components and the torches (141) of the other series of welding torches being mounted mobile on   the device in the vicinity of the other assembly device blage (89).   26 Apparatus (91) for assembling a dynamo-electric machine (21) having a fixed assembly (23) and a rotating assembly (25), the fixed assembly comprising a stator (33) traversed by a bore (35), a series tie rods (37) fixed to the stator, each tie rod having at its opposite end parts (39, 39 a) two   legs (41, 41 a) extending in respective directions   two opposite flanges, two opposite end flanges   (27, 27 a) which have two series of openings   slopes (29, 29 a), the openings being dimensioned in a predetermined manner larger than the corresponding legs and at least one first (27) of the flanges comprising an approximately central through-orifice (31), the rotating assembly comprising a shaft (43) having two opposite end parts (45, 45 a) and a rotor (47) fixed to the shaft between the opposite end parts of the shaft, apparatus characterized in that it comprises: two devices assembly (89, 113) movable relative to each other; seat means (87) provided on a first (89) of the assembly devices for carrying the first flange in an assembly arrangement; recess means (101) formed in the first assembly device for receiving a first end portion (45) of the shaft which extends through the approximately central orifice (31) formed in the first flange ( 27); means (107) for establishing a preselected air gap between the bore (35) of the stator (33) and the rotor (47) when the first end portion of the shaft is received in the recess means following the positioning of the stator around the rotor while one (41) of the series of legs of the   tie rods is held in position in a pre-   terminated in the openings of the series of openings (29) formed in the first flange in an arrangement spaced from said openings; elastic means (115) arranged on the second assembly device (113) to come into biasing support against the second flange (27 a) while the openings of the second series of openings (29 a) formed in this flange receive the legs of the second series of legs (41 a) in a spaced relative arrangement; motor means (177) associated with the second   assembly device (113) for direct maneuvering   tion of the first assembly device (89) in order to cause the resilient biasing of the elastic means against the second flange (27a); two sets of means (117, 117 a) likely   to be moved to pre-welded positions   selected to weld the flanges approximately simultaneously to the series of lugs while these   are kept in their arrangement spaced apart from   port to the corresponding openings of the series of openings formed in the flanges, one (117 a) of the series   welding means being mounted on the second device   assembly tif (113) so as to be mobile joint-   lie with him towards his welding position   preselected when the second assembly device   blage is operated by the driving means; and O a series of means (143-147) associated with the other series of welding means for actuating this other series of welding means in the direction of its welding position.   27 Apparatus according to claim 26, charac-   terrified in that the means used to establish a   iron include a series of shims (107) designed to support the adjustment of spacing between the bore (35) of the stator and the rotor (47).   28 Apparatus according to claim 27, charac-   terrified in that the means used to establish a   iron further comprise means (155-167) for moving the shims (107) to a position in which they surround the rotor (47) before placing   in position of the bore (35) of the stator around the totor.   29 Apparatus according to claim 28, charac-   terized in that the first assembly device (89) is traversed by a series of passages (109) designed to be in guide support against the respective shims (107) from the series of shims.   Apparatus according to claim 26, charac-   terized in that it further comprises means (103) associated with the recess forming means (101) provided on the first assembly device and capable of being maneuvered to come into locking abutment against the first part d end (45) of the shaft (43) received in the recess means.   31 Dynamo-electric machine (21), characteristic   laughed in that it comprises: SWÀ at least one end flange (27, 27 a) having two opposite faces; at least one opening (29, 29 a) formed   in this flange, this opening having a side wall   line (59, 59 a) which intersects the opposite faces (61, 63, 61 a; 63 a) of the flange; at least one tie rod (37) carrying the flange in the dynamo-electric machine and comprising at least one abutment surface (111, IIIa) disposed in support of   stop against the moon (61, 61 a) of the opposite faces of the flas-   that at least at the vicinity of the intersection of the side wall of the opening with the other face (63, 63 a) of the flange, a tab (41, 41 a) formed in one piece with said abutment surface of the pulling and extending generally axially from this surface at least partially in the opening of the flange, this tab having a free end arranged spaced apart adjacent to the other end face of the flange, this tab being dimensioned in a predetermined manner smaller than said opening so as to form a space between the side wall of the opening and the tab; and   a weld (119, 119 a) extending through   towards the space between the side wall and the lug to assemble the flange therebetween, at least in the vicinity of the intersection of the side wall and the other face of the flange, and the free end of the lug so as to maintain predetermined spacing   between the tab and the side wall of the opening.   32 Dynamo-electric machine, characterized in that it comprises: two opposite end flanges (27, 27 a) * each of which is provided with a series of transverse openings   health (29, 29 a); a series of tie rods (37) each of which has its opposite end parts (39, 39 a) provided with respective lugs (41, 41 a) which extend at least partly through the corresponding openings of the respective flange, the tabs being predeterminedly sized smaller than the openings and being   arranged in a predetermined manner in an arrangement   spaced apart from the openings; and each flange being assembled by series   respective welds (119, 119 a) adjacent to the openings   tures with at least part of each leg respective.   33 Dynamo-electric machine as claimed   cation 32, characterized in that the end parts   opposite half (39, 39 a) of the tie rods (37) have respective abutment surfaces (111, 111 a), one of the abutment surfaces of at least one of the tie rods being in abutment against one of the flanges and the opposite abutment surfaces of at least two of the tie rods being in abutment against the other flange.   34 Dynamo-electric machine according to one   any of claims 32 and 33, characterized in   that each of the openings (29, 29 a) has a side wall (59, 59 a) which extends through the respective flange (27, 27 a), the side walls being in an arrangement spaced apart from the legs (41, 41 a) which are received there.   Dynamo-electric machine according to one   any of claims 32 to 34, characterized in   that the respective welds (119, 119 a) extend across the spaces between the tabs (41, 41 a) and the respective openings (29, 29 a) to ensure   assembling the flanges with the legs.   36 Dynamo-electric machine according to one   any of claims 32 to 35, characterized in   what it comprises, in addition, a stator (33) disposed between the end flanges (27, 27 a), the tie rods (37) being fixed to the stator.   37 Dynamo-electric machine according to the res-   dication 36, characterized in that it further comprises a rotating assembly (25) associated with the stator (33), each flange (27, 27 a) comprising a bearing (71, 71 a)   to rotate the rotating assembly.   38 Dynamo-electric machine (21), characteristic   sée in that it comprises: two opposite end flanges (27, 27 a); two series of openings (29, 29 a) extending   respectively each approximately axially through   towards one of the corresponding flanges; a stator (33), crossed by an approximately axial bore (35), disposed between the flanges; windings (83) associated with the stator and extending generally around the bore (35); a series of tie rods (37) fixed to the stator and each comprising opposite end parts (39, 39 a), one of the end parts of at least one of the tie rods being in abutment against one flanges and the other end parts of at least two of the tie rods being in abutment against the other flange, two series of legs (41, 41 a) extending approximately axially and oriented in opposite directions being formed in the opposite end portions of the beams and extending at least in part in the series of flange openings in which they are   arranged in a predefined relationship   finished; two series of welds (119, 119 a) connecting the flanges, at least in the vicinity of the openings formed therein, to at least a portion of the legs which extend, at least in part, into the openings to maintain the relationship of 'spacing between them; a rotor (47) disposed at least partially in the bore (35) of the stator (33); a shaft (43) fixed to the rotor (47); and two bearings (71, L 1 a) associated with the flanges   end to carry the shaft for rotation.   39 Dynamo-electric machine (21), characteristic   located in that it comprises: first and second opposite end flanges (27, 27 a) each having a peripheral portion (65, 65 a) and a portion (51, 51 a) approximately central;   an orifice (31) passing through the central part   trale of at least one of the first and second flanges; first and second series of openings (41, 41 a) formed in preselected locations approximately adjacent the peripheral portions of the first and second flanges, respectively, the openings having respective side walls (59, 59 a) which extend generally axially through the first and second flanges; a stator (33) placed approximately   in an axially spaced arrangement between the flas-   ques end and traversed by an axial bore (35) and comprising a series of notches (81) for receiving windings disposed in the assembly around the bore; windings (83) received in the stator slots and extending generally around the bore; a series of tie rods (37) fixed to the stator and comprising first and second opposite abutment surfaces (111, illa), the first abutment surface (111) of at least one of the tie rods being disposed in abutment against the first flange (27) and the second abutment surfaces of at least two of the tie rods being disposed in abutment against the second flange (27 a), first and second series of opposite tabs (41, 41 a) being formed on the first and second surfaces of   opposite stop of the tie rods and extending approximately-   axially from said surfaces at least in part through the first and second openings of the   first and second flanges, the legs being dimension-   predeterminedly born smaller than the openings and being placed in a predetermined manner in a general arrangement radially spaced from the side walls (59, 59 a) of the respective openings; first and second series of welds (119, 119 a) which assemble the first and second flanges, at least in the vicinity of the side walls of the first and second series of openings formed therein, at least at a portion of each of the legs first and   second series of legs which extend at least partly   tie through the first and second openings in a relative arrangement spaced from the side walls of the openings; a rotating assembly (25) comprising a   shaft (43) having first and second end portions   mite (45, 45 a) and a rotor (47) arranged at least in par-   tie inside the bore (35) of the stator (33) and fixed to the shaft between said end parts; and first and second levels -71, 71 a)   associated with the first and second approximate flanges-   ment in the vicinity of their respective central part (51, 51 a) to rotate the first and second end parts of the shaft, one (71) of the first and second bearings extending approximately around the 'central hole (31) forms in the first flange (27), one of the first and second end portions of the shaft extending   generally axially through this orifice.