chaindrivenew機(jī)械設(shè)計英文ppt教案_重大(編輯修改稿)
2025-01-03 21:43 本頁面
【文章內(nèi)容簡介】 ating life expectancy because flexure and friction contact occur between hardened bearing surfaces separated by an oil film. ? Operates in hostile environments such as high temperatures, high moisture or oily areas, dusty, dirty, and corrosive atmospheres, etc., especially if high alloy metals and other special materials are used. ? Long shelf life because metal chain ordinarily doesn’t deteriorate with age and is unaffected by sun, reasonable ranges of heat, moisture, and oil. ? Certain types can be replaced without disturbing other ponents mounted on the same shafts as sprockets. Drawbacks of chain drives that might affect drive system design are: ? Noise is usually higher than with belts or gears, but silent chain drives are relatively quiet. ? Chain drives can elongate due to wearing of link and sprocket teeth contact surfaces. ? Chain flexibility is limited to a single plane whereas some belt drives are not. ? Usually limited to somewhat lowerspeed applications pared to belts or gears. ? Sprockets usually should be replaced because of wear when worn chain is replaced. Vbelt sheaves exhibit very low wear. Coiler drive Drive for a rollersupported drum with a diameter of approx. 2 m and a length of 9 m Roller conveyor Board slitter saw synchronously driven Applications Shaft center distance In general, the preferred range of center distance for roller chain drives that allow adjustable center distances is 30 to 50 chain pitches. Roller chain drives with fixed centers should be limited
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號-1