![]() Due to the smaller wrap angle, power transmission capacity is also lower. The angle of wrap or contact angle between belt and pulley is always below 180°. DIFFERENCE BETWEEN OPERA AND OPERA TOUCH DRIVERHere driver and driven shafts rotate in opposite directions. Here driver and driven shafts rotate in the same direction. Here belt bends in two different planes in every rotation. Here the entire belt remains in the same plane in every rotation. In cross belt drive, the belt proceeds from the top of one pulley to the bottom of another pulley and thus crosses itself. Open Belt Drive Cross Belt Drive In an open belt drive, the belt proceeds from the top of one pulley to the top of another pulley without crossing. In addition, it requires relatively long belts. However, continuous rubbing of the belt leads to the short life and quick failure of the belt. The wrap angle also increases, resulting in higher power transmission capability. Here the driven shaft rotates in the opposite direction to the driver shaft. On the other hand, in the cross belt drive, the belt moves from the top of one pulley to the bottom of the other pulley and thus crosses itself. In addition, the wrap angle is always below 180 ° thus, the power transmission capacity is also reduced. Here the induced shaft will rotate in the same direction as the driver shaft. In an arrangement where the endless (joint) belt moves from the top of one winch to the top of another pulley without crossing it, it is called open belt drive. This classification applies mostly to flat belts because v-belts are always used in open configurations. It also affects the power transmission capacity due to the change in wrap angle between the belt and the pulleys. ![]()
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