General Electric Company

Richard D Burns

Albert J Wesseldyk

Eldon E Moodie

Connection insulators having a plurality of insulating compartments for electrically isolating electrical connections formed from strips of insulating material of indeterminate length. In one embodiment, a first strip of insulating material is supplied to a securing station at a predetermined average rate of supply and a second strip of insulating material is supplied to a forming station at a predetermined average rate of supply greater than the predetermined average rate of supply of the first strip with the pliability of the second strip being enhanced by heating the strip for aiding the deformability characteristics of the second strip. The second strip of insulating material is deformed into predetermined patterns at the forming station and then moved into position adjacent to the first strip of insulating material at the securing station. The two strips are secured together by ultrasonically welding the strips at the securing station and then advanced and positioned at a cutting station, for severing the two insulating strips for establishing a connection insulation having a plurality of insulating compartments or pockets. In another embodiment, a plurality of insulating compartments are established by securing together a first strip or sheet of insulating material and a second strip or sheet of insulating material, and then the compartments are substantially closed at one end thereof by reconfiguring one of the strips of insulating material.

Connection insulators

Methods and apparatus for making electrical phase insulators for dynamoelectric machines are disclosed wherein a phase insulator includes two spaced apart planar portions formed of an insulating material interconnected by at least one connector made of an insulating material. First and second strips of planar insulating material are supplied and positioned at spaced apart locations at a securing station. At least one strip of connector material is supplied to a conditioning station and stretched for elongating and assuring straightness of the at least one connector strip. The stretching of the connector material is accomplished by gripping a second section of the connector strip at a location longitudinally spaced apart from a gripped first section and relatively moving the first and second sections thereby elongating a confined portion of the connector material located between the first and second sections. Elongation of the connector material strip removes curvature or 'set' existing in the connector material and assures that the phase insulators being fabricated are provided with straight connectors. Straight connectors facilitate automatic or machine insertion of the phase insulators into dynamoelectric machine cores. A stretched portion of the at least one connector strip is advanced to the securing station and severed thereby establishing at least one elongated segment of connector material. The at least one elongated segment is positioned relative to the two strips of spaced apart planar insulating material at the securing station so that respective ends of the elongated segment overlap the first and second strips of planar material. The ends of the elongated segment are then fused or ultrasonically welded to the respective strips of planar insulating material thereby interconnecting the planar strips with the elongated segment or connector portion for establishing a phase insulator having a straight connector portion so as to facilitate machine insertion into a dynamoelectric machine magnetic core.

Methods for fabricating electrical phase insulators for dynamoelectric

Methods for making connection insulators

Disclosed are stator assemblies with phase insulators that are prestraightened. Insulators may be severed from a sheet of insulating material or fabricated from planar insulation pieces alone or from a combination of planar insulation pieces and one or more filamentary pieces. Details of different methods, insulators, and apparatus are also disclosed.

Dynamoelectric machine phase insulators and apparatus for making the same

This patent discloses a method of manufacturing rotors particularly adapted for use in hermetically sealed motor-compressor units of the type to be utilized for refrigeration applications. Previously known standard manufacturing steps are followed in producing a rotor having counterweights at one end thereof secured to the rotor by any suitable fastening means. Practice of the present invention results in rotors that include a shroud overlying the counterweights. In the manufacture of the shroud itself, I locate a centrally disposed region and define such region by piercing the shroud material along a major portion of its perimeter, but retain at least two tabs or ears which interconnect the centrally disposed portion of the shroud with the remainder of the shroud. The resulting shroud preferably has a centrally disposed portion which then may be separated from the remainder of the shroud by fracturing the interconnecting tabs in order to expose the rotor shaft. Thereafter, the shaft may be pressed out of the rotor, and the central portion of the shroud retained. Subsequently, the central portion of the shroud is relocated on the remainder of the shroud, pressed into position, and refastened by any suitable means, such as, but not limited to, spot welds, silver solder, brazing, etc. The rotor having a reassembled shroud then is usable in a reassembled compressor.

Methods of making improved rotor assembly

Methods and apparatus for fabricating electrical phase insulators for

Methods and apparatus for making electrical phase insulators for dynamoelectric machines are disclosed wherein a phase insulator includes two spaced apart planar portions formed of an insulating material interconnected by at least one connector made of an insulating material. First and second strips of planar insulating material are supplied and positioned at spaced apart locations at a securing station. At least one strip of connector material is supplied to a conditioning station and stretched for elongating and assuring straightness of the at least one connector strip. The stretching of the connector material is accomplished by gripping a second section of the connector strip at a location longitudinally spaced apart from a gripped first section and relatively moving the first and second sections thereby elongating a confined portion of the connector material located between the first and second sections. Elongation of the connector material strip removes curvature or 'set' existing in the connector material and assures that the phase insulators being fabricated are provided with straight connectors. Straight connectors facilitate automatic or machine insertion of the phase insulators into dynamoelectric machine cores. A stretched portion of the at least one connector strip is advanced to the securing station and severed thereby establishing at least one elongated segment of connector material. The at least one elongated segment is positioned relative to the two strips of space apart planar insulating material at the securing station so that respective ends of the elongated segment overlap the first and second strips of planar material. The ends of the elongated segment are then fused or ultrasonically welded to the respective strips of planar insulating material thereby interconnecting the planar strips with the elongated segment or connector portion for establishing a phase insulator having a straight connector portion so as to facilitate machine insertion into a dynamoelectric machine magnetic core.

Apparatus for making connection insulators

Apparatus holds in alignment a stack of a plurality of loose laminations so that clamp bolt holes therein are held in an accurately aligned condition while the stack is compressed (in the vicinity of the bolt holes) between pads that simulate mounting pads in a compressor, and a means for applying a force localized in the bolt hole regions. The compressive forces simulate and closely approximate the compressive forces that ultimately will be applied to the bolt hole regions under the heads of mounting bolts in a compressor. Various eccentricities and dimensional variations between the bore and bolt holes are transferred to the bore, and while the stack is held with the preselected compressive forces, the bore is shaped with a roller burnisher so that it will be concentric relative to the bolt holes.

Apparatus for making dynamoelectric machine stators

This patent discloses methods of manufacturing rotors particularly adapted for use in hermetically sealed motor-compressor units of the type to be utilized for refrigeration applications. Previously known standard manufacturing steps are followed in producing a rotor having counterweights at one end thereof secured to the rotor by any suitable fastening means. Practice of the present invention results in rotors that include a shroud overlying the counterweights. In the manufacture of the shroud itself, I locate a centrally disposed region and define such region by piercing the shroud material along a major portion of its perimeter, but retain at least two tabs or ears which interconnect the centrally disposed portion of the shroud with the remainder of the shroud. The resulting shroud preferably has a centrally disposed portion which then may be separated from the remainder of the shroud by fracturing the interconnecting tabs in order to expose the rotor shaft. Thereafter, the shaft may be pressed out of the rotor, and the central portion of the shroud retained. Subsequently, the central portion of the shroud is relocated on the remainder of the shroud, pressed into position, and refastened by any suitable means, such as, but not limited to, spot welds, silver solder, brazing, etc. The rotor having a reassembled shroud then is usable in a reassembled compressor.

Rotor assembly having shroud with replaceable knock-outs

Methods are disclosed for making a phase insulator for a desired core size from a phase insulator of a smaller size. The insulator may be severed from a sheet of insulating material or fabricated from planar insulation pieces alone or from a combination of planar insulation pieces and one or more filamentary pieces. Details of different methods, insulators, and apparatus are also disclosed.

Methods for making dynamoelectric machine phase insulators

Take-up apparatus for phase insulator fabrication equipment. A take-up reel is mounted at the exit end of the equipment in properly aligned and squared relationship to the fabricated phase insulator belt and is driven in a continuously rotating mode alternately at high and slow speeds. The fabricated belt forms a downwardly depending loop into the trough of which is laid a constant mass adjustable width shaped somewhat like a dumbbell in form. The tension roll has two cylindrical end weights adjustably positioned onto a grooved connecting rod. The positioning of the end weights is adjustable to accommodate fabricated phase insulator belts of different widths without changing the weight of the tension roll thus assuring proper tensioning of the accumulated belt roll on the reel irrespective of the width of the belt being accumulated.

Take-up apparatus for electrical phase insulator fabricating equipment

A method which involves aligning a stack of a plurality of loose laminations so that clamp bolt holes therein are held in an accurately aligned condition while the stack is compressed (in the vicinity of the bolt holes) between pads that simulate mounting pads in a compressor, and a means for applying a force localized in the bolt hole regions. The compressive forces are preselected to simulate and closely approximate the compressive forces that ultimately will be applied to the bolt hole regions under the heads of mounting bolts in a compressor. Since the stack is initially aligned before the compressive forces are applied and while the laminations are free to shift relative to one another, the various eccentricities and dimensional variations between the bore and bolt holes are transferred to the bore. Then, while the stack is held with the preselected compressive forces, the bore is shaped to be concentric relative to the bolt holes. One means that may be used to shape the bore is a tool known in the motor manufacturing art as a roller burnishing tool.

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Holland, MI, United States of America

Richard D Burns