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Title: Double-stator electromagnetic pump having alignment ring and spine assembly

A support structure for clamping the inner coils and inner lamination rings of an inner stator column of an electromagnetic induction pump to prevent damaging vibration. A spine assembly, including a base plate, a center post and a plurality of ribs, serves as the structural frame for the inner stator. Stacked alignment rings provide structure to the lamination rings and locate them concentrically around the spine assembly central axis. The alignment rings are made of a material having a high thermal expansion coefficient to compensate for the lower expansion of the lamination rings and, overall, provide an approximate match to the expansion of the inner flow duct. The net result is that the radial clamping provided by the duct around the stator iron is maintained (approximately) over a range of temperatures and operating conditions. Axial clamping of the inner stator structure is achieved via tie rods which run through grooves in the ribs and engage the base plate at the bottom of the inner stator and engage a clamping plate at the top. Slender tie rods and a flexible clamping plate are used to provide compliance in the axial clamping system to accommodate differential thermal growth (axially) between the tiemore » rods and lamination ring elements without losing clamping force.« less
 [1];  [2];  [3];  [1]
  1. (San Jose, CA)
  2. (Aptos, CA)
  3. (Livermore, CA)
Issue Date:
OSTI Identifier:
General Electric Company (San Jose, CA) OAK
Patent Number(s):
US 5642011
Contract Number:
Research Org:
General Electric Co
Country of Publication:
United States
double-stator; electromagnetic; pump; alignment; spine; assembly; support; structure; clamping; inner; coils; lamination; rings; stator; column; induction; prevent; damaging; vibration; including; base; plate; center; post; plurality; ribs; serves; structural; frame; stacked; provide; locate; concentrically; central; axis; material; thermal; expansion; coefficient; compensate; overall; approximate; match; flow; duct; net; result; radial; provided; iron; maintained; approximately; range; temperatures; operating; conditions; axial; achieved; via; tie; rods; run; grooves; engage; bottom; top; slender; flexible; compliance; accommodate; differential; growth; axially; elements; losing; force; tie rods; inner coil; inner flow; thermal growth; electromagnetic pump; differential thermal; base plate; expansion coefficient; central axis; operating conditions; thermal expansion; support structure; induction pump; operating condition; inner coils; clamping force; electromagnetic induction; flow duct; structural frame; /310/417/