Mechanical Engg.

Raipur, India

Mechanical Engg.

Raipur, India
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Bisen A.M.,Mechanical Engg. | Ganguly S.K.,Mechanical Engg.
International Journal of Applied Engineering Research | Year: 2012

In this paper, an attempt has been made to find out the effect of hard and soft starts of electric motor in the industrial application and the need of soft starting arrangement in the 3 high open train rolling mill. It is used for the three phase induction motor which generally used in the rolling mill. The A.C. Induction motor can consume the electricity of ten times its initial capital cost - in ONE YEAR. When fitted to almost any AC Induction motor Soft Starts can produce energy savings of between 10 and 20% Usually, with a payback of less than 2 years. Soft Starts is recognized by the Energy Efficiency Council. When starting, an AC Induction motor develops more torque than is required at full speed. This stress is transferred to the mechanical transmission system resulting in excessive wear and premature © Research India Publications.


Balraj U.S.,Mechanical Engg. | Anitha P.,Mechanical Engg. | Gopalakrishna A.,Mech.Engg.
Applied Mechanics and Materials | Year: 2014

In this paper, rotary electrical discharge machining of RENE 80 nickel super alloy is carried out to study the effect of process parameters like peak current, pulse on time, pulse off time and rotational speed of electrode on surface integrity characteristics like white layer thickness and surface crack density. The number of experiments, optimum levels of the parameters and their effects are studied using Taguchi method. The significant process parameters are identified using analysis of variance. It is found that the responses are affected mainly by peak current and pulse on time. The experimental results reveal that white layer thickness increases with increase of peak current and pulse on time whereas the surface crack density decreases with increase of peak current and pulse on time. © (2014) Trans Tech Publications, Switzerland.


Rajbongshi D.,Mechanical Engg | Dutta S.,Mechanical Engg | Malakar G.,Mechanical Engg | Swargiary R.,Mechanical Engg | And 2 more authors.
International Journal of Applied Engineering Research | Year: 2014

A three bladed Savonius rotor had been fabricated, and its base is fixed on square plate of cast iron. Around the savonius rotor eight semi-circular (nonmovable) blades had been kept and are fixed on the square cast iron plate. The model is kept in front of the circular pipe just after the blower and the speed of the air coming out from the circular pipe of the blower is varied by a valve inside the circular pipe. The experimental set up comprises of blower section, convergent-divergent nozzle, straight section and gate at the end. The X-axis of the square of the plate is kept in alignment with the axis of the pipe of the blower and the rotational speed of the rotor was measured in the case when the X-axis of the square plate has been rotated by 30°, 45°, 60°, 75° and 90°. And it has been found in many cases the rotation speed of the rotor is much more than the rotational speed of the rotor when there is no deflector around the bladed rotor. By taking into consideration of all type of orientation of savonius rotor and eight deflectors in front of, the wind coming from the pipe and opening of the valve by 5%, 10%, 15% and 20%, and it has been found that (a) for 5 % of valve opening the angular speed of the rotor is 64 rpm (in case when there is no deflector and 130 rpm (having 8 deflectors) (b) for 10 % of valve opening the angular speed of the rotor is 148 rpm (in case when there is no deflector and 218 rpm (having 8 deflectors) (c) for 5 % of valve opening the angular speed of the rotor is 254 rpm (in case when there is no deflector and 390 rpm (having 8 deflectors) (d) for 5 % of valve opening the angular speed of the rotor is 340 rpm (in case when there is no deflector and 530 rpm (having 8 deflectors). Thus it can be concluded that rotational speed of the savonius rotor can be increased considerably by using deflectors and thus power output can also be increased. © Research India Publications.


Pradhan S.K.,Mechanical Engg | Kumar A.,Mechanical Engg | Sinha A.N.,Mechanical Engg
Applied Mechanics and Materials | Year: 2014

AGV is mostly used in industrial application to move material around manufacturing facility. Here assembling of AGV is done by using components like chassis, wheels, wiper motors, gear motor, LED sensors, tactile sensor, actuators etc. AGV is designed with the help of electrical design of sensors which are used to control AGV during operation when it is moved on guided path. AGV design was modelled and simulated using catiaV5 software. Design was modelled and drawing preparation was done using catiaV5.Static analysis was done for stress using catiaV5.Here principal stresses at different point were obtained having different deflection. Graphs are plotted for principal stress verses deflection and Navigation performance of AGV uses electric motor. Thus AGV is used to pick up the object with proper gripping system. A navigation system has been developed using sensors. AGV contains software and hardware components and is primarily used for material handling in industries. Static analysis was done for stress using catiaV5. Graphs are plotted for principal stress vs. deflection. The same analysis can be done for different material depending on loading condition. Stress analysis concept can be used to study dynamic analysis. Optimization of AGV can be possible by using different material. To evaluate the performance simulations were conducted using catiaV5 maintaining a constant setup inputs all over. © (2014) Trans Tech Publications, Switzerland.

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