Stator of submerged motor
First Claim
1. A stator of a submerged motor comprising:
- a stator core having a winding applied thereto;
an outer cylinder supporting said stator core at the outside;
an inner cylinder supporting said stator core at the inside; and
end covers joining said outer and inner cylinders together at end portions thereof to provide a watertight container composed of said outer and inner cylinders and said end covers and having a hardened resin filled in a vacant space between the inner and outer cylinders and the end covers;
wherein the improvement comprises;
increased wall thickness portions formed at said inner cylinder at axial opposite end portions thereof in the vicinity of joints of the inner cylinder with the end covers, one of said increased wall thickness portions being formed on an outer side surface of one axial end portion and the other increased wall thickness portion being formed on an inner side surface of the other axial end portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A stator of a submerged motor is provided with cylinders formed of carbon fiber reinforced plastics of superhigh precision. To obtain flawless joints between the cylinders of carbon fiber reinforced plastics and the end covers increased wall thickness portions are provided at opposite axial end portions of an inner cylinder near joints of the inner cylinder with the end covers, one increased wall thickness portion being located at one axial end portion on an outer side surface thereof and the other increased wall thickness portion being located at the other axial end portion on an inner side surface thereof. Thus, the inner cylinder has a small wall thickness at an axial central portion to reduce an eddy current loss while its wall thickness is increased at the opposite axial end portions to improve mechanical strength and facilitate joining of the end covers to the inner cylinder.
58 Citations
8 Claims
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1. A stator of a submerged motor comprising:
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a stator core having a winding applied thereto; an outer cylinder supporting said stator core at the outside; an inner cylinder supporting said stator core at the inside; and end covers joining said outer and inner cylinders together at end portions thereof to provide a watertight container composed of said outer and inner cylinders and said end covers and having a hardened resin filled in a vacant space between the inner and outer cylinders and the end covers; wherein the improvement comprises; increased wall thickness portions formed at said inner cylinder at axial opposite end portions thereof in the vicinity of joints of the inner cylinder with the end covers, one of said increased wall thickness portions being formed on an outer side surface of one axial end portion and the other increased wall thickness portion being formed on an inner side surface of the other axial end portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification