Examples of mechanical loads with constant torque are:
- lifting mechanisms, elevators, winches
- machine tools with a constant cutting force
- conveyor belts, feed motors
- grinders without fan action
- piston pumps and compressors at constant pressure
- roller mills
- in part also shears and punches
- planers
- bearings, gearing
The mean load torque MLm in these applications corresponds roughly to the
rated torque MN of the load. Thus, in these applications the power P can be proportionally
reduced by reducing the speed n. Cutting the speed in half cuts the
power in half.
3.1.2 Torque increases in proportion to speed
This relationship arises as shown in Figure 3.2.1 for example in speed-proportional
friction (viscous friction) during rolling and processing of paper, textiles or
rubber tiles.
Examples of mechanical loads with constant torque are:- lifting mechanisms, elevators, winches- machine tools with a constant cutting force- conveyor belts, feed motors- grinders without fan action- piston pumps and compressors at constant pressure- roller mills- in part also shears and punches- planers- bearings, gearingThe mean load torque MLm in these applications corresponds roughly to therated torque MN of the load. Thus, in these applications the power P can be proportionallyreduced by reducing the speed n. Cutting the speed in half cuts thepower in half.3.1.2 Torque increases in proportion to speedThis relationship arises as shown in Figure 3.2.1 for example in speed-proportionalfriction (viscous friction) during rolling and processing of paper, textiles orrubber tiles.
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