AIR NOISE SUPPRESSING DEVICE

PROBLEM TO BE SOLVED: To reduce air noise arising from current collectors including a pantograph fixed to the roof of a rolling stock running at high speed. SOLUTION: Many longitudinal straightening fins 2 for suppressing air noise are provided on current collectors including a collector shoe 1 fixe...

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Bibliographische Detailangaben
1. Verfasser:	ISHII MASAYASU
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PERFORMING OPERATIONS PHYSICS SOUND-PRODUCING DEVICES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To reduce air noise arising from current collectors including a pantograph fixed to the roof of a rolling stock running at high speed. SOLUTION: Many longitudinal straightening fins 2 for suppressing air noise are provided on current collectors including a collector shoe 1 fixed on a pantograph causing air noise. Also, lateral straightening fins 3 are provided on the side of the longitudinal straightening fins 2. Furthermore, air holes 4 are provided in the longitudinal and lateral straightening fins 2, 3. Then, air noise is suppressed by providing a drowning-out pipe 5 passed through the collector shoe 1 parallel to the heading direction of the car, a noise drowning-out opening 6 streamlining the side of the collector shoe 1 at the end part of the noise drowning-out pipe 5 and the like.