TO PRODUCE COMPRESSED AIR USING SINGLE ACTING CYLINDER (AUTO-PNEUMATIC SYSTEM) BY USING TWO WHEELER FRONT WHEEL SHOCK ABSORBER

Transcription

1 TO PRODUCE COMPRESSED AIR USING SINGLE ACTING CYLINDER (AUTO-PNEUMATIC SYSTEM) BY USING TWO WHEELER FRONT WHEEL SHOCK ABSORBER PROJECT REFERENCE NO.: 38S1391 COLLEGE : SHAIKH COLLEGE OF ENGINEERING & TECHNOLOGY BELAGAVI BRANCH : MECHANICAL DEPARTMENT GUIDE : PROF. GIRISH ZULAPI STUDENTS : MR. DINESH JADHAV MR. KIRAN PATIL MR. SHRIHARI SAVDATTI MR. MARUTI DONE INTRODUCTION In today s industrial world man s innovative ideas has taken him towards all directions concerning about the production and safety in industrial establishments. Some instruments are of shear excellence where as others are the result of long research and persistent work, but it is not the amount of time and money spent in the invention of device or the sophistication of its operation, but its convenience, utility and operational efficiency that are important in considering the device. During times of emergency, especially during journeys if the air pressure of our vehicle decreases then it poses a great problem to the rider. In order to help during such emergencies portable equipment is required which can help the rider to easily pump air into the vehicle tyre to the required air pressure without any excess effort and power requirement. OBJECTIVES The primary objective of this project is to fabricate a very simple and portable yet an effective air pumping device which will help a common man to be self dependent. A very low capital investment; hence affordable for the common vehicle rider. This will not need an artificial power source, ensuring minimum running cost. Portability, which will be an added feature reducing the carrying or transportation cost.

2 Simple yet effective design, surfacing another feature of the machine i.e. its remarkably low maintenance cost METHODOLOGY MATERIAL: 1) Tank: Material:-mild steel, Operation:-welding. 2) Hose pipe: Material:-plastic, Operation:-Cutting, Fitting. 3) Clamp: Material:-Mild steel, Operation: fitting. 4) Cylinder: Material:-mild steel, Operation: fitting. 5) Valve: Material:-mild steel, Operation: fitting. WORKING PRINCIPLE: In APS, the pneumatic cylinder which is mounted parallel on the shock absorber of the front wheel of the motorcycle in such a way that the reciprocating action of the pneumatic cylinder is achieved, which in turn creates the movement of piston in cylinder for the compression of air. Figure: Block Diagram of AUTO-PNEUMATIC SYSTEM 3D MODELING Isometric view Front view RESULTS PRESSURE CALCULATIONS Air Pressure inside the tyre tube of a two wheeler automobile is 35psi Converting to N/m 2

3 35psi= (35x1x9.81)/ (2.24x (2.54x10-2 ) 2 ) = N/m 2 =2.375 Bar SPECIFICATIONS FOR HELICAL COIL SPRING OF THE SHOCK ABSORBER Spring Steel (modulus of rigidity) G = 78600N/mm2 Mean diameter of a coil, D=33.3mm Diameter of wire, d = 6.7mm Total no of coils, n1= 17 Height, h = 210mm Outer diameter of spring coil, D0 = D +d =40mm No of active turns, n= 15 Weight of bike = 131kg Let weight of 1person = 75Kg Weight of 2 persons = 75 2=150Kg Weight of bike + persons = 281Kg Rear Suspension = 65% 65% of 281 = 183Kg Considering dynamic loads it will be double W = 366Kg = 3590N For single shock absorber weight = w/2= 1795N = W We Know that, compression of spring (δ) = (WD3n)/ (G.d4) = 47mm CALCULATION ABOUT THE AMOUNT OF AIR VALVE In case of two people seating on the motorcycle: Weight of two people (w) =75+75=150kg (Say) Weight of bike = 131kg. (Referred) Dia. of piston = 30mm i) Pressure on the piston P= (F/A) = ( / (π/4)30^2)=5.078n/mm2 = 50.78bar =50.78* =3.57psi Storage tank is 40psi (pressure) air to be filled in the tyre tube ii) Air compressed in one stroke: V= (π/4) d^2*l = (π/4)*(0.03) ^2*0.047 =3.32*10^-5m^3

4 iii) Volume of tank: Dia. of tank = 100mm =0.1m Length of tank = 340mm =0.34m Volume = (π/4) d^2*l = (π/4)*0.1^2*0.34 = 2.67*10^-3m^3 iv) No of strokes: = (volume of tank) / (volume per stroke of piston) =2.67*10^-3 / 3.32*10^-5 =82 v) Considering per kilometer the no. of speed breakers to be 5. Based on this the motorcycle should travel Distance travelled = no. of strokes / 5 = 82/5 = 16.4 km APPLICATIONS 1) Suspension compresses air. 2) Air horn. CONCLUSIONS We have taken up this project as real challenge, as we were not experience in the field. We started our work on this project facing new hurdles initially. After the completion of the project work we tried its working in our college machine shop and we were pleased to note that it does meet the requirements for what it is meant. The maneuverability of the device is quite good and the handling is quite simple. For commercial purpose one can improve the efficiency of the device effectively by increasing the size of the device. SCOPE FOR FUTURE WORK We feel the project that we have done has a good future scope in any engineering industry. The main constraint of this device is the high initial cost but has low operating costs. Savings resulting from the use of this device will make it pay for itself with in short period of time & it can be a great companion in any engineering industry dealing with rusted and unused metals. The device affords plenty of scope for modifications, further improvements & operational efficiency, which should make it commercially available & attractive. If taken up

5 for commercial production and marketed properly, we are sure it will be accepted in the industry. It has plenty of scope if the device is made larger in size.