Title:
ROTOR OF ROTARY MACHINE
Document Type and Number:
Japanese Patent JP3438154
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the appearance of overstress in a conductor due to the resonance of a rotor and an electromagnetic exciting force by making vibratory characteristics of the rotor constant, for example, by increasing a torsional natural frequency of the rotor, in a rotary machine.
SOLUTION: A rotor of a rotary machine has such a structure that a part or the entire part of a head 25 of a conductor 24 may be supported in the circumferential direction and not supported in the radius direction or may be supported softer in the radius direction than in the circumferential direction. The conductor 24 is fastened to an inner circumference of a short-circuit ring 26. By eliminating a holding ring, an end of the conductor 24 can be made light-weight. As for varnish to be put in a space between the conductor and a recess of an iron core 21, hard varnish is used at a refrigerant outlet side and soft varnish is used at a refrigerant inlet side. The width of the space is made wider at the refrigerant inlet side than at the refrigerant outlet side. By this, a torsional natural frequency increases and an electromagnetic exciting force at the time of resonance becomes smaller and so, overstress does not appear in the conductor owing to the resonance of a rotor and the electromagnetic exciting force. Furthermore, vibratory characteristics of the rotor become constant and therefore overstress does not appear localy owing to the resonance of the rotor and the electromagnetic exciting force.
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Inventors:
Kazuyuki Yamaguchi
Tosuke Hirata
Toruyuki Takagi
Hayato Imai
Tatsuaki Ishikawa
Tosuke Hirata
Toruyuki Takagi
Hayato Imai
Tatsuaki Ishikawa
Application Number:
JP14882696A
Publication Date:
August 18, 2003
Filing Date:
June 11, 1996
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H02K1/28; H02K15/02; H02K17/16; (IPC1-7): H02K17/16; H02K1/28; H02K15/02
Domestic Patent References:
| JP4222446A | ||||
| JP458076U |
Attorney, Agent or Firm:
Tatsuyuki Unuma
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