Rotary electric machine
View Patent ↗In a power generator provided with a stator frame having a stator iron core incorporating a stator coil therein in an inner portion thereof, and a rotor in which a rotor coil rotating so as to oppose to the stator frame and the stator iron core is incorporated, the power generator is provided with a noise insulation plate fixed to a noise insulation plate attaching seat welded to an outer surface of the stator frame by a bolt and a nut, an elastic body (a gasket) is provided in a contact portion between the noise insulation plate attaching seat and the noise insulation plate, and a vibration-proofing rubber washer is provided in a contact portion between the noise insulation plate and the nut.
1. A rotary electric machine comprising:
a stator structured such that a stator coil is incorporated in a stator iron core;
a rotor arranged so as to oppose to said stator and structured such that a rotor coil is incorporated in a rotor iron core;
the stator and the rotor being stored within a stator frame,
wherein the rotary electric machine comprises:
an acoustic absorbent arranged on an outer surface of said stator frame;
a noise insulation plate arranged in a divided manner on an outer surface of said acoustic absorbent; and
a T-shaped noise insulation plate attaching seat firmly attached to a part of the outer surface of said stator frame, and
wherein an end portion of said divisionally arranged noise insulation plate is fixed to said T-shaped noise insulation plate attaching seat by a fastening means, and an elastic body is arranged between said T-shaped noise insulation plate attaching seat and said noise insulation plate.
2. A rotary electric machine as claimed in claim 1 , wherein a space portion is provided between said acoustic absorbent and said stator frame.
3. A rotary electric machine as claimed in claim 2 , wherein a retention bracket holding said acoustic absorbent is arranged in said space portion.
4. A rotary electric machine as claimed in claim 1 , wherein a space portion is provided between said noise insulation plate and said acoustic absorbent.
5. A rotary electric machine as claimed in claim 1 , wherein a vibration-proofing means is provided between said noise insulation plate and said fastening means.
6. A rotary electric machine as claimed in claim 5 , wherein said fastening means is constituted by a stud bolt passing through said T-shaped noise insulation plate attaching seat, the elastic body, the noise insulation plate and the vibration-proofing means and having one end firmly attached to said stator frame, and a nut fastening said stud bolt, a vibration-proofing rubber washer serving as said vibration-proofing means is arranged between said nut and said noise insulation plate, and a gasket serving as said elastic body is arranged between said T-shaped noise insulation plate attaching seat and said noise insulation plate.
7. A rotary electric machine as claimed in claim 5 , wherein said fastening means is constituted by a bolt passing through said T-shaped noise insulation plate attaching seat, the elastic body, the noise insulation plate and the vibration-proofing means, and a nut fastening said bolt, a vibration-proofing rubber washer serving as said vibration-proofing means is arranged between said nut and said noise insulation plate, and a gasket serving as said elastic body is arranged between said T-shaped noise insulation plate attaching seat and said noise insulation plate.
8. A rotary electric machine comprising:
a stator structured such that a stator coil is incorporated in a stator iron core;
a rotor arranged so as to oppose to said stator and structured such that a rotor coil is incorporated in a rotor iron core;
the stator and the rotor being stored within a stator frame,
wherein the rotary electric machine comprises:
a T-shaped noise insulation plate attaching seat firmly attached to a part of an outer surface of said stator frame, and
wherein an end portion of said divisionally arranged noise insulation plate is fixed to said T-shaped noise insulation plate attaching seat by a fastening means, an elastic body is arranged between said T-shaped noise insulation plate attaching seat and said noise insulation plate, a space portion is formed between said stator frame and said noise insulation plate, and a pressure of the space portion is set to a negative pressure or an inert gas is filled in the space portion.
9. A rotary electric machine as claimed in claim 8 , wherein in the case of setting said space portion under a negative pressure, the pressure is set between 10 −1 torr and 10 −2 torr.
10. A rotary electric machine as claimed in claim 8 , wherein in the case that the inert gas is filled in said space portion, the inert gas is constituted by a helium or an argon.
11. A rotary electric machine as claimed in claim 8 , wherein a vibration-proofing means is provided between said noise insulation plate and said fastening means.