The pump is mounted on the end of driver shaft while the turbine on the driven shaft. The fluid enters into the pump through its centre and when the drive shaft rotates, due to centrifugal force it is pushed outwards.
The casing is such that it diverts the motion of fluid into the turbine and the turbine blades along with the turbine start rotating. This way the pump and the turbine both make a coupling. When an extra part called a reactor is introduced between the pump and the turbine, surprisingly the device becomes a torque converter which is an alternative to manual clutch in automatic transmission systems in cars!
Application- It is widely used in marine and industrial applications where controlled start-up of the power transmission is very essential. This is sooo cool! Also it is able to transmit power through variable angles. The joint is protected by applying grease on it and is covered by rubber boots.
Application- Rzeppa joint is used in vehicles with independent rear suspension. In India, if you notice, you can see these joints near the rear wheels of rickshaws and tuk-tuks or chhakdas. As the name suggests, this type of coupling can be used anywhere. The universal joint can transmit power even at high parallel or angular misalignments. It consists of a pair of hinges close together perpendicular to each other connected by cross shafts.
Unlike Rzeppa joint, the universal joint is not a constant velocity joint. Application- Universal joints are used in machines where there are space restrictions or high flexibility is needed. A good example would be the usage of this joint for transmission of power from the engine to the rear differential via propeller shaft. You could clearly see the universal joint under the trucks! I hope you found the article helpful, up to point was easy to understand.
If you liked it please comment down below. Help your friends by sharing it with them because that is what I want- I want to help maximum people who are pursuing mechanical engineering. It was great experience about your article. It gained lot important things and knowledge in very simple language.
Thank you very much.. Interesting article, I have always been fascinated by things mechanical and after spending most of my life working on many automobiles and motorcycles, I have great respect for the designs and engineers who created them! Diaphragm couplings are one of the nonlubricated couplings used in high-performance turbomachinery, transmitting torque and serving misalignment between equipment shafts.
This type of coupling transmits torque from the outside to inside diameter, and then from inside diameter to outside diameter.
Diaphragm couplings uses a single or a series of plates for the flexible members. Diaphragm coupling allows angular, axial or parallel misalignment. This coupling are used where high torque and high speed required. A fluid coupling is also known as hydraulic coupling. It is a hydrodynamic device used to transmit rotating mechanical power through the acceleration and deceleration of hydraulic fluid.
It is consists of an impeller on the driving shaft input and a runner on the driven shaft output. The impeller act as a pump and the runner acts as a turbine. In impeller near its axis, the tangential component of absolute velocity is low. An increase in velocity also increases in kinetic energy. The fluid emerges at high velocity from the impeller, strikes on the runner blades, transfers its energy, and leaves the runner at low velocity.
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Coupling and Types. How does a Shaft Coupling Work? Why Shaft Coupling is Used? Types of Coupling 4. Download PDF. Enter your email address Sign Up. Say hi to him Helped me a lot. Glad you liked it. Preparing for my trade test, useful. Where can I get more of this? We have tons of articles on our website.
Please checkout. Sir i want to download this pdf. I have sent you the PDF file of this article to your inbox. Really great sir Reply. There is always some clearance in between the both muffs at centre line for the tightening space of the nuts. The torque is transmitted from one shaft to another by means of friction between the sleeve and the shafts periphery. A key is also placed in between the sleeve and shaft for the proper connection which is necessary for the torque transmission.
Both friction and shear force between key and shaft are responsible for the torque transmission. The major difference between the clamp coupling and muff coupling is the way of torque transmission. In muff coupling torque is transferred by means of shear forces of the key where as in clamp coupling torque is transmitted by the two ways one is by means of friction between the sleeve and shaft and other by shear resistance between key and shafts.
This coupling is not suitable for high speed applications. Its applications in line shaft power transmissions. As name implies flange coupling has flanges for the joining of both the shafts.
It is another type of rigid coupling so all the conditions are also applicable here like proper alignment of both the shafts and connection should not have any kind of vibrations and jerks. Here we use two flanges one is for input shaft and the other is for the output shaft. The shafts are joining with the flanges by means of keys and both the flanges are connected together by using nut and bolt connections.
Key is responsible for the power transmission in this coupling. The flanges have spigot and recesses at the centre for the proper connection. The proper alignment is always required for the good connection. This is used for high speed applications because it has proper and tight connection by means of flanges and nut-bolts.
It is widely used in power transmission because easy to assemble and simple in construction. This is another category of coupling. As name suggest it has flexible connection between the input and the output shaft because it is very difficult to make a proper aligned connection between the two mating shafts and there are various reasons for the misalignment between the two shafts such as deflection of shafts, thermal expansions etc.
Flexible coupling able to tolerate small eccentricity between the two shafts and in flexible couplings some kind of flexible element know as bush are used as extra part which helps in reduction of vibrations and jerks so which make it to use in little vibration conditions. We can say that flexible couplings are the best for the power transmission between two shafts.
The cost and the complex construction is the main disadvantage of this coupling. Bush-Pin flexible coupling is one of the most famous type of flexible coupling. In this bushes are used for absorbing the shocks and vibrations. The bushes are made up of the flexible elements like rubber. The construction of bush-pin coupling is almost same as the flange coupling as we discussed above the only extra part is bushes. These bushes are mounting in between the flanges and the shafts.
Bushes are not only able compensate the small eccentricity between the two mating shafts as well as provide a tight connection between flange and shaft due to this reason Bush-Pin coupling used for high torque transmissions.
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