H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 6/02 (2006.01) E21B 4/02 (2006.01) F04C 2/107 (2006.01) H05B 6/36 (2006.01)
Patent
CA 2692995
Embodiments of the invention provide a system and method for induction heating a helical rotor of a progressing cavity pump in order to reduce the surface roughness of the rotor. In order to heat the rotor most evenly, it is desired to space the coil as closely around the rotor as possible. The invention provides a mechanism for threading the helical rotor through an induction coil having an interior diameter which is less than the major diameter of the rotor. The induction coil may include one loop and overlapping ends. The rotor to be heated is rotated about its longitudinal axis and advanced axially through the coil as it rotates. The axial speed and rotational speed are synchronized so that the rotor moves one pitch through the coil for each complete rotation.
Coulas James
Mills Robert A. R.
Borden Ladner Gervais Llp
Kudu Industries Inc.
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