Method of assembling a dyanamoelectric machine

• US 3,961,416 A
• Filed: 06/09/1975
• Issued: 06/08/1976
• Est. Priority Date: 04/21/1972
• Status: Expired due to Term

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Otto, Charles W.
• Primary Examiner(s): Hall, Carl E.
• Application Number:
  US05/585,148
• Time in Patent Office: 365 Days
• Field of Search: 29/596, 29/598, 310/42, 310/43, 310/89, 310/254, 310/258, 310/259, 164/108, 164/110, 164/111, 228/165, 228/173, 228/244, 228/257, 228/185
• US Class Current: 29/596
• CPC Class Codes: B23K 28/00 Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
• CPC Class Codes: H02K 1/185 to outer stators
• CPC Class Codes: H02K 15/16 Centering rotors within the stator; Balancing rotors
• CPC Class Codes: H02K 5/04 Casings or enclosures characterised by the shape, form or construction thereof
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine

Abstract

A method of assembling a dynamoelectric machine having a stationary member, a rotatable member, and a pair of means for rotatably supporting the rotatable member within the stationary member. In this method, beams are attached to the stationary member, and opposite end portions of the beams extend from the stationary member. The rotatable means is then mounted with the stationary member and the supporting means with one of the opposite end portions of the beams within means in one of the supporting means for receiving them. The receiving means is at least partially filled with molten metal which solidifies for interconnecting the one opposite end portion of the beams with the one supporting means, and the other of the supporting means is then secured to the other of the opposite end portions of the beams.

Claims

1. A method of assembling a dynamoelectric machine comprising the steps of:

a. mounting a set of beams to a magnetic core with two spaced portions of each beam extending from opposite faces of the core, respectively;

b. positioning a rotor within the bore of the magnetic core with a rotor shaft journaled through a bearing of a first bearing carrying end shield;

c. positioning the set of beam portions extending from one of the opposite faces of the core within a set of sockets in the first bearing carrying end shield with an air gap existing between the inner walls of the sockets and the extending beam portions residing therewithin;

d. filling at least portions of the air gaps with molten metal;

e. solidifying the molten metal to form metallic plugs within the sockets in abutment with the inner socket walls and the extending beam portions residing therewithin;

f. positioning the set of beam portions extending from the other of the opposite faces of the core within a set of second sockets in a second bearing carrying end shield with air gaps existing between the inner walls of the second sockets and the extending beam portions residing therewithin, and with the rotor shaft journaled through the bearing of the second bearing carrying end shield;

g. filling at least portions of the air gaps within the second set of sockets with molten metal; and

h. solidifying the molten metal in the second set of sockets in abutment with the second set of socket inner walls and the extending beam portions residing therebetween.

2. A method in accordance with claim 1 wherein the extending portions of the beams residing within the first and second sets of sockets each have an aperture which is filled with molten metal while portions of the air gaps therewith are filled, and wherein the molten metal in the beam apertures is solidified while the molten metal within the air gaps is soldified.

3. A method in accordance with claim 1 wherein at least a portion of each of the sockets is bifurcated by a socket stud projecting from an inner wall of the socket into the air gap therewithin, and wherein during the first filling step and the second filling step the air gap adjacent the socket stud is filled with molten metal, and wherein during the first solidifying step and the second solidifying step the molten metal adjacent the socket stud is solidified.

4. A method in accordance with claim 1 wherein at least a portion of each of the sockets is bifurcated by a socket stud projecting from an inner wall of the socket into the air gap therewithin and wherein during the first filling step and the second filling step the air gap about the socket stud is filled with molten metal and wherein during the first solidifying step and the second solidifying step the molten metal adjacent the socket stud is shrunk thereon.

5. In assembling a dynamoelectric machine a method of mounting a bearing carrying end shield to a magnetic core comprising the steps of:

securing a plurality or rigid beams to the magnetic core with a portion of each beam extending from the core;

positioning a rotor within the magnetic core with the rotor shaft journaled through a bearing carried by the end shield and with part of the extending portion of each beam positioned within a socket in the end shield;

introducing molten metal into the sockets; and

solidifying the molten metal.

6. The method of claim 5 wherein the beams are U-shaped in cross section, and wherein the molten metal is introduced into the sockets by pouring the molten metal into the U-shaped beams above the sockets and permitting the molten metal to flow downwardly within the U-shaped beams and into the sockets.

7. The method as set forth in claim 5 comprising the intermediate step of closing an end of the sockets prior to the introducing step.

8. The method of claim 5 wherein a portion of each socket is bifurcated by a socket stud projecting from an inenr socket wall, and wherein molten metal in introduced into the sockets to envelope the socket studs.

9. A method of mounting first and second bearing carrying end shields to a magnetic core member of a dynamoelectric machine comprising the steps of:

securing a plurality of rigid beams to the magnetic core with portions of each beam extending from first and second core faces;

positioning a rotor within the magnetic core with the rotor shaft journaled through the bearing of a first bearing carrying end shield positioned adjacent the first core face;

securing the extending portions of the plurality or rigid beams to the first bearing carrying end shield by respectively positioning part of the extending portions of the plurality of beams within a plurality of sockets in the first bearing carrying end shield, introducing molten metal into the plurality of sockets, and solidifying the molten metal; and

securing the second bearing carrying end shield to the plurality of beams with the rotor shaft journaled through the bearing of the second bearing carrying end shield.

10. A method of assembling a dynamoelectric machine having a stationary member, a rotatable member adapted to be rotatably received in the stationary member, and a pair of means for rotatably supporting the rotatable member within the stationary member comprising the steps of:

a. attaching to the stationary member a plurality of beams having opposite end portions extending from the stationary member, respectively;

b. mounting the rotatable member with the stationary member and the supporting members with at least one of the opposite end portions of the beams within means in at least one of the supporting means for receiving them;

c. filling at least partially the receiving means with molten metal and solidifying it for interconnecting the one opposite end portion of the beams with the one supporting means; and

d. securing the other of the supporting means to the other of the opposite end portion of the beams.

11. The method as set forth in claim 10, wherein the filling and solidifying step includes shrinking of the metal upon its soldification for gripping engagement with at least some of the one opposite end portions and at least a portion of at least some of the receiving means.

12. The method as set forth in claim 10, wherein at least some of the one opposite end portions include means adapted to be at least partially enveloped by the metal thereby to prevent relative displacement of the beams and the one supporting means subsequent to the filling and solidifying step.

13. The method as set forth in claim 10, comprising the intermediate step of closing an end of the receiving means prior to the filling and solidifying step.

14. The method as set forth in claim 13, wherein the intermediate step further comprises engaging means for resisting heat with the one supporting means about the receiving means therein.

15. The method as set forth in claim 14, wherein the mounting step comprises spacing the one opposite end portion from the ends of the receiving means for preventing engagement of the one opposite end portion with the heat resisting means.

16. The method as set forth in claim 10, wherein the mounting step further comprises spacing the one opposite end portion from confronting side walls of the receiving means.

17. The method as set forth in claim 10, comprising the preliminary step of providing the one opposite end portion with means for engagement with the meatl upon the soldifying thereof to prevent displacement of the one opposite end portion from the receiving means.

18. The method as set forth in claim 17, wherein the engagement means includes at least one aperture extending through the one opposite end portion, resepctively.

19. The method as set forth in claim 17, wherein the engagement means include means on the one opposite end portion and extending therefrom.

20. The method as set forth in claim 10, wherein the receiving means comprise sockets having side walls disposed in spaced relation with the one opposite end portion.

21. The method as set forth in claim 20, wherein the sockets include means integral with the side walls and extending generally away therefrom into the sockets for gripping engagement with the metal upon the solidifying thereof.

22. The method as set forth in claim 21, wherein the gripping means include a stud having one end connecting with the side wall and having a cross-member on a free end thereof within the socket.

23. The method as set forth in claim 10, wherein the attaching step further comprises staking the beams into displacement preventing engagement with means for containing them provided in the stationary member.

24. The method as set forth in claim 10, wherein the filling and solidifying step further comprises pouring the molten metal between gaps formed between the one opposite end portion and the receiving means thereby to provide metal plugs upon the solidifying of the metal in engagement between the one opposite end portion and the receiving means.

25. The method as set forth in claim 10, comprising the preliminary step of forming means in at least some of the one opposite end portions for accomodating the passage therethrough of molten metal during the filling and solidifying step.

26. The method as set forth in claim 10, wherein the beams are generally U-shaped in cross-section, and wherein the filling and solidifying step further comprises pouring the molten metal generally into the U-shaped section of the beams adjacent the entry thereof into the receiving means and flowing the molten metal downwardly within the U-shaped section of the beams into the receiving means.

27. A method of assembling a dynamoelectric machine having a stationary member, a rotatable member, and a pair of means for supporting the rotatable member with respect to the stationary member comprising the steps of:

a. connecting to the stationary member a plurality of beams each having a pair of opposite end portions;

b. assembling the rotatable member with the stationary member and at least one of the supporting means with one of the opposite end portions of each of the beams disposed within a generally open end of means integrally formed in the at least one supporting means for accepting the beam end portions;

then

c. providing a hardenable material in the accepting means and freely flowing it therein into interfacing relation with both the at least one supporting means and at least a part of the beam end portions within the accepting means; and

then

d. solidifying the hardenable material to form a generally solidified rigid tie between the supporting means and the beam end portions; and

e. securing the other of the supporting means to the other of the opposite end portions of each of the beams.

28. The method as set forth in claim 27, wherein the hardenable material is generally constituted by a metal.

29. The method as set forth in claim 27, wherein the solidifying step includes shrinking the hardenable material into mechanical connection between the at least a part of the beam end portions and an associated portion of the supporting means thereby forming the generally solidified rigid tie.

30. The method as set forth in claim 27, wherein the providing and flowing step includes supplying at least a predetermined amount of the hardenable material in the accepting means.

31. The method as set forth in claim 27, comprising the intermediate step of closing an end opposite the open end of the accepting means prior to the providing and flowing step.

32. The method as set forth in claim 27, wherein the at least part of the beam end portions includes means for engagement with the hardenable material upon the forming of the generally solidified rigid tie thereby to generally prevent displacement of the beams from the at least one supporting means.

33. The method as set forth in claim 27, wherein the at least one supporting means includes means extending into the accepting means for engagement with the hardenable material upon the forming of the generally solidified rigid tie thereby to generally prevent displacement of the at least one supporting means from the beams.

34. The method as set forth in claim 27, comprising the additional step of securing other means for supporting the rotatable member to the other of the end portions of the at least one supporting means.

35. In the manufacture of a dynamoelectric machine, a method of assembling a structural component and a stationary member of the dynamoelectric machine comprising the steps of:

a. attaching to the stationary member at least one generally elongate beam having an end portion extending from the stationary member;

b. disposing a rotatable member for the dynamoelectric machine in the stationary member and the structural component and positioning the end portion within means in the structural component for generally encompassing at least a part of the end portion; and

then

c. providing in the encompassing means a hardenable material and freely flowing it therewithin into interfacing relation with both at least a part of the structural component and the at least part of the end portion; and

d. solidifying the hardenable material to form a solidified connection between the structural component and the end portion.

36. The method as set forth in claim 35, wherein the hardenable material is generally constituted by metal.

37. The method as set forth in claim 35, wherein the solidifying step includes shrinking the hardenable material into mechanical interconnecting engagement with both the at least part of the supporting means and the at least part of the end portion thereby to form the generally solidified connection therebetween.

38. The method as set forth in claim 35, wherein the at least part of the structural component is generally constituted by means integral with the structural component and extending into the encompassing means for engagement with the hardenable material upon the forming of the generally solidified conenction thereby to generally prevent displacement of the structural component from the at least one beam.

39. The method as set forth in claim 35, wherein the at least part of the end portion includes means for engagement with the hardenable material upon the forming of the generally solidified connection to generally prevent displacement of the at least one beam from the structural component.

40. The method as set forth in claim 35, comprising the intermediate step of closing an end of the encompassing means prior to the providing an flowing step.

41. The method as set forth in claim 35, wherein the providing and flowing step includes supplying to the encompassing means at least a predetermined amount of the hardenable material.

42. The method as set forth in claim 35, comprising the additional step of associating another structural member with the rotatable member and the at least one beam at another portion thereof generally opposite to the first named end portion.