| 摘要 |
PURPOSE:To permit prediction of gear noises in the stage of rated running with good accuracy by measuring gear noises in the transient stage corresponding to rated running. CONSTITUTION:A semi-anechoic room 10 enclosed with sound absorbing wedges 11 over the entire part, a dynamo 12 as a driving machine installed in a dynamo chamber 13, a test gear speed reducer 16 of which input side 16a is connected to the extension shaft 14 of the dynamo via a gear coupling 17, a speed-increasing gear 18 connected to the output side 16b via a gear coupling 19, and a regenerative motor 20 as a brake device connected to the gear 18 via a coupling 21 are provided and the entire part is covered with a soundproofing cover 22. A test gear 16 is used in the test gear speed reducer of such testing machine and the gear noises in the transient stage corresponding to rated running are measured with a noise meter, whereby the gear noises in the state of rated running are predicted. |
