Tandem Roller. Monday , June 04th , 2018 - 15:04:15 PM
The next machine is usually a single smooth drum compactor that compacts the high spots down until the soil is smooth and this is usually done in combination with a motor grader to get a level surface. Sometimes at this stage a pneumatic tyre roller would be used. These rollers feature two rows (front and back) of pneumatic tyres that overlap and the flexibility of the tyres provides a kneading action that seals the surface and with some vertical movement of the wheels enables the roller to operate effectively on uneven ground. Once the soil base is flat the pad drum compactor is no longer used on the road surface.
In the photo assuming the smallest gear is connected to the motor it is called the drive gear or input gear. The somewhat larger gear in the middle is called an idler gear. It is not connected directly to either the motor or the output shaft and only transmits power between the input and output gears. There is a third gear in the upper-right corner of the photo. Assuming that gear is connected to the machine s output shaft it is the output or driven gear.
As internal combustion engine technology improved during the 20th century kerosene- gasoline- (petrol) and diesel-powered rollers gradually replaced their steam-powered counterparts. The first internal-combustion powered road rollers were very similar to the steam rollers they replaced. They used similar mechanisms to transmit power from the engine to the wheels typically large exposed spur gears. Some users did not like them in their infancy as the engines of the era were typically difficult to start particularly the kerosene-powered ones.
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