![]() ![]() Only inside surface of the belt can come in contact with the pulleys. It has rectangular cross-section where the width is substantially larger than the thickness. So it is costlier.Ĭonfiguration of belt: A flat belt is hinged at one point to make an endless belt. ![]() V-belt and corresponding pulleys have complicated construction. ![]() V-belt cannot be utilized for stepped pulley system as shifting from one pulley to another is infeasible.įlat belt and corresponding pulleys are simple in construction. In case of stepped pulley system, flat belt can be shifted from one diameter pulley to another without pausing the rotation. Higher speed reduction, up to 1:7, is attainable. Slip also limits the achievable speed reduction. It is preferred for short to medium distance power and motion transmission. It is recommended for long distance power and motion transmission. V-belt can transmit more power without slip due to increased friction. Power transmission capacity of flat belt is comparatively lower due to higher chance of slip. In V-belt drive, two side surfaces of the belt remain in contact with the pulleys. In flat belt drive, only one surface of the belt remains in contact with the pulleys. V-belt has trapezoidal cross-section where larger side width is almost same with thickness.įlat belt is jointed (hinged). Table: Difference between flat belt drive and V-belt drive Flat Belt Driveįlat belt has rectangular cross-section where width is substantially larger than thickness. Various differences between flat belt drive and V-belt drive are given below in table format. However, it is particularly suitable when driver and driven shafts are small distance away. Here two side surfaces of the belt remain in contact with pulley, which increases transmission capability and reduces slip. V-belt drive utilizes an endless trapezoidal (cross-section) belt with pulleys having corresponding V-grove. It can have two arrangements-open and crossed. Although its capacity is low, it is overwhelmingly used for long distance power transmission. In flat belt drive a joined belt of rectangular cross-section is used where only one flat face of the belt remains in contact with the pulley. This is realized by employing V-belt drive. Typical flat belt drive (Image courtesy: )Īnother way of improving power transmission capacity is by increasing contact area between the belt and pulley. This can be done by replacing open belt drive by cross belt drive, if otherwise permitted. One way to increase transmission capacity is by increasing wrap or contact angle. Since friction force between the pulley and the belt helps transmitting power, capacity of belt drive is mainly limited by frictional characteristics, contact angle and initial tension. Belt drive is suitable for small to long distance power transmission and can inherently protect the system from overloading and vibration. An endless belt is then partially wrapped around the pulleys maintaining appropriate tension. Here two pulleys are first mounted with the driver and driven shafts. Four mechanical drives, namely gear drive, belt drive, chain drive and rope drive are utilized to serve this purpose.īelt drive is one friction drive where motion and power are transmitted by means of friction. Here comes the role of mechanical power transmission system, which transmits motion, torque and power from driver element (like prime mover) to the driven element (such as machine unit). However, such prime movers are located away from the machine unit and thus another transmission system is desired. For example, an electric motor converts electric energy into mechanical power. A prime mover is used to convert other form of energy to mechanical energy. Majority of the machines are driven be mechanical power, which is nothing but torque of rotational shaft. Machine can be defined as the cluster of mechanisms that can perform certain task by expanding energy. ![]()
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