Centrifugal Pump

A centrifugal pump has an impeller on the inside of a casing. Liquids are forced into the centre or “eye” of the impeller. The impeller rotates and the rotational force is converted into centrifugal force. The liquid is propelled out the impeller channel into the volute chamber, where some of the force is turned into…

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Maximum Tension in the Belt

While the centrifugal tension σcfσcf acts equally throughout the belt during operation and the quasi-static tensions σtσt and σsσs are only present to this extent in the corresponding belt sections, the bending stress acts only during rotation around pulleys, with the largest bending stress acting on the smaller drive pulley (see figure above). The maximum belt stress therefore occurs on the…

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Centrifugal Tension

Since the belt continuously runs over the pulleys, therefore, some centrifugal force is caused, whose effect is to increase the tension on both, tight as well as the slack sides. The tension caused by centrifugal force is called centrifugal tension. At lower belt speeds (less than 10 m/s), the centrifugal tension is very small, but at…

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Length of a Cross Belt Drive

We have already discussed that in a cross belt drive, both the pulleys rotate in opposite directions as shown in Fig. Let  r1 and r2 = Radii of the larger and smaller pulleys, x = Distance between the centres of two pulleys (i.e. O1 O2), and L = Total length of the belt. Let the belt leaves the larger pulley at E and G and the smaller…

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Length of an open Belt Drive

We have already discussed that in an open belt drive, both the pulleys rotate in the same direction as shown in Fig. Let r1and r2= Radii of the larger and smaller pulleys, x = Distance between the centres of two pulleys (i.e. O1 O2), and L = Total length of the belt. Let the belt leaves the larger pulley at E and G and the smaller…

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