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    Mechanical Power Transmission

    INTRODUCTION

    Mechanical Power Transmission from the electrical motors to machines is usually done by connecting the electrical motors to the machine by coupling. excluding the coupling arrangement, various machine parts square measure wont to transmit power from prime movers to meant machines for his or her movement. there’s the following machine part that’s utilized for mechanical power transmission are:

    (1) Belts

    (2) Pulleys

    (3) Gears

    (4) Chains

    (5) Sprockets

    TYPE OF BELTS

    (1) Flat belt

    (2) Rope belt

    (3)”V” Belt

    FLAT BELTS:

    Flat belts are a simple machine element accustomed transmit power between a pair of parallel shafts. they’re going to supply power transmission at intervals on the vertical plane in addition. they are mostly used in textile mills for power transfers to machines. they have splice joints. space unit|they’re} used once parallel shafts square measure at an associate outsized distance. they are often conversant in prune the higher rotating speed of electrical motors to the slower speeds required by mechanical instrumentality. they are skinny and rectangular in cross-sectional, however, their breadth is reasonably smart. they are fabricated from cotton material. they are low value and want low maintenance costs. A belt drive is consists of a driving block, a driven block, and a belt. Power is transmitted by the belt victimization the resistance force Flat Belt block Mechanical Power Transmission

     

    Flat-belt-pully-mechanical power transmission
    Flat-belt-pully-mechanical power transmission

     

    ROPE BELTS:

    Ropes belts are of two types

    (1) Fiber ropes

    (2) Steel wire rope

    FIBRE ROPES

    Fiber ropes are fabricated from cotton, hemp, and Manila. Manila ropes could be a heap of stronger than cotton and hemp ropes. A rope belt is an element in circular cross-sections. Rope element is used in grooved pulleys. The grooved pulleys angle should not be over forty-five degrees. the amount of ropes is utilized on, which can increase the load propulsion capability of the ropes. they are not smart to resist shock a whole lot whereas lifting a whole lot. lately nylon ropes square measure in use.

    STEEL WIRE ROPES

    Steel wire ropes are fabricated from steel wires, they are circular cross-sectional. they are capable to handle vital a whole lot. they are used in cranes, overhead cranes in industries for lifting vital machines and instrumentality. These space units square measure capable to resist shock a whole lot whereas lifting vital a whole lot, because of their constructional features.

    CONSTRUCTION OF STEEL WIRE ROPE

    While constructing steel wire ropes, the quantity of wires is twisted into a strand. The strand consists of wires seven,19, or 37 in numbers. Then strands square measure twisted around a core to form the rope. Strands might even be 0.5 a dozen or eight in numbers. The Centre of the rope is formed from hemp.

    “V” BELT

    V belts are machine elements widely used for mechanical power transmission. they are used once the parallel shaft is at a bit distance. the world unit quadrangle is cross-sectional and is employed with V grooved pulleys, the groove angle might even be from 34 to cardinal degrees. V belts unit of measurement usually fabricated from material and rubber. The manufactured in a pair of series (1) traditional V belt (2) High capability V belt “V” Belt block Mechanical Power Transmission

    'V' BELT PULLEY MECHANICAL POWER TRANSMISSION
    ‘V’ BELT PULLEY MECHANICAL POWER TRANSMISSION

     

    TIMING BELT

    Timing belts unit of measurement the toothed V belts. They keep the shaft running at an awfully synchronous speed. style of the block (1) Flat Rim block (2) Single V groove block (3) Multi V groove block FLAT RIM pulleys unit of measurement used for flat belt power transmission. they are having a complicated rim surface. they are usually fabricated from cast iron, steel, or fashioned steel. ‘V’ GROOVE block they’re manufactured as single grooves and multi-groove pulleys. The V groove created in them contains a V angle from 34 to cardinal degrees. V groove block might even be made up of cast iron, steel, or fashioned steel.

    TYPE OF GEARS

    (1) Spur gears

    (2) Bevel gears

    (3) Miter Gears

    (4) Spiral bevel gears

    (5) Worm and gear wheel

    (6) Rack and pinion

    (7) involute gears

    (8) Roller chains and Sprockets

    SPUR GEARS

    The gear wheel is that the most common kind of gear conversant in transmits motion and power to the parallel shafts. they are having straight teeth parallel to the gear axis. they are fabricated from cast-iron or solid steel

    BEVEL GEARS

    Bevel gears are accustomed transmit power from one shaft to a unique once a pair of shaft axes unit of measurement crossed each other at some angle. These gears seem as if a cone shape. This arrangement of power transmission is known as an angular train.

    MITER GEARS

    Miter gears are the bevel gears. When the bevel gears shaft intersects each other at ninety degrees, miter gears are used.

    SPIRAL BEVEL GEARS

    Spiral bevel gears having curvilinear teeth. They are used to transmit the power to the crossed shaft at some angle. They transmit heavy positive power to the crossed shaft as their teeth pairing area is larger than the teeth pairing area of spur gears. They operate taciturnly with little vibrations. Spiral bevel gears are more economical than spur gears.

    WORM AND COG WHEEL

    Worm and gear wheel arrangement is used to transmit motion and power between non-parallel and non-intersecting shafts. This arrangement is consists of a worm and gear wheel.

    ROLLER CHAINS AND SPROCKETS

    Chain drives have a pair of toothed wheels named sprockets. Sprockets are mounted on parallel shafts. Rotating motion and power are transmitted from one shaft to another by a running roller chain over the sprockets.

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