ifp ch. no. 4 intro. to & compon. of pneumatic system
TRANSCRIPT
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Subject:- Industrial Fluid Power (IFP)CHAPTER NO: 04
INTRODUCTION TO AND COMPONNTS OF PNEUMATIC SYTEMS (24 Marks (14)
BY
Prof. Kokare A.Y.
BABASAHEB PHADTARE POLYTECHNICKALAMB-WALCHANDNAGAR.
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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General Layout of Pneumatic System
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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1. Operating pressure of compressed air.2. Flow rate of compressed air.3. Filter rating for selection of filter.4. Stroke length required for selection of cylinder.5. Force required and speed required by the actuator.6. Compatibility, durability, cost etc.7. Port size, pipe size etc. of connections.8. Environmental conditions such as temperature, humidity etc.9. Surrounding condition such as chemical, high temp. etc.
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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1. It is very fast in operation, because very low viscosity of compressed air.
2. It can run continuously for long period.3. It works better even in hot surrounding. It cools even at 125oc4. Its better work in mines, because it does not generate any
spark and hence no chances of explosion and fire hazard.5. It is very clean and absolutely dust free surrounding.6. It is environment friendly.7. Return line is absent, makes circuit simpler.8. Leakage of compressed air does not have any problem.9. If overloaded system is stalls. System will start working once
the load is reduced.10.Automatic and safety circuits are possible.
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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1. Force develop is very less as compare with Hydraulic system.2. The compression of air is very costly.3. Lubrication is required.4. System is noisy unless exhaust port are fitted with silencer.5. Precise control of speed is not possible. Because low viscosity.
1. Pneumatic tools: Drilling m/c, nut runner, screw driver etc.2. Packing m/c. 3. Material handling: Clamps, conveyor, robotic
arm.4. Mining 5. Automobile: Air brake, Air suspension etc.6. Machine tools: Pneumatic press, clamps, vices etc.7. Medical and dental equipment: Dental chair, operating table, Dental drill.
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Double acting Reciprocating compressor Selection criteria for Air
compressor
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
1. Avg. air consumption- capacity should be 2 to 3 times of avg. air.
2. FAD3. Air receiver capacity- volume of
receiver tank is greater than volume is comp. in 1 minute.
4. Power supply.5. Configuration- tank mounted or
base type, simplex or duplex, Reciprocating or rotary type.6. Component and accessories- power switch relays,
thermostats, pressure gauge, drain plug.
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Double acting Reciprocating compressor Important point considered
in air receiver tank
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
1. Receiver tank must be sufficiently large
2. Receiver tank must be sufficiently strong to withstand pressure
3. Receiver tank must have important accessories- pressure relief valve, drain valve, press. Gauge, temp. gauge etc.
4. Capacity of Receiver is atm. Press. X FAD per minute
to the Press. Of comp. air.
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FRL Unit- (Filter, Regulator, Lubricator)
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Air Filter Air Regulator
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Air Lubricator Condensation of waterMoisture Separator
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Coalescence Element type Filter Air Dryers
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
There are two types-1.Refrigerated air dryer.2.Chemical air dryer. A. Deliquescent air dryers. B. Absorption air dryers.
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a) According to function: 1. Pressure control valves:
Relief valve Reducing valve Unloading valveCounter balanced valve Sequence valve .
2. Direction control valve:check valve 2/2 valve 3/2 valve 4/2 valve
4/3 valve 5/2 valve. 3. Flow control valve :
Fixed restriction FCV Variable restriction FCVFCV with Reverse free flow Pressure compensated
valveTemperature compensated valve Cam operated FCV
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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b) According to the method actuation: 1. Manual operated:
Palm operated Push button operated Hand lever operated. Foot pedal operated Cam(roller) operated 2. Pilot operated:
a.Single pilot b.Double pilot. 3. Solenoid operated:
Single solenoid Double solenoid.c) According to construction: 1. Poppet type: Ball type, conical poppet type. 2. Spool type: Sliding spool type, rotary spool type. 3. Flow control : Gate valve, plug valve, needle valve, poppet
valve, butterfly valve etc.
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Pressure Relief Valve Pressure Reducing Valve
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Sequence Valve
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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a) According to the method actuation: 1. Manual operated:
Palm operated Push button operated Hand lever operated. Foot pedal operated Cam(roller)
operated 2. Pilot operated:
a.Single pilot b.Double pilot. 3. Solenoid operated:
Single solenoid Double solenoid. b) According to ype of spool: 1. Poppet type. 2. Sliding Spool type. 3. Rotary spool type.a)According to number of ports and position:
check valve 2/2 valve 3/2 valve 4/2 valve4/3 valve 5/2 valve.
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Check Valve
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Check Valve Animation.mp4
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Sliding Spool type 2/2 DCV
Rotary Spool type 2/2 DCV
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
2/2 Direction Control Valve
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Sliding Spool type 3/2 DCV
Rotary Spool type 3/2 DCV
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
3/2 Direction Control Valve
using a 3 2 valve NO to control a cylinder.mp4
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Sliding Spool type 4/2 DCV
Rotary Spool type 4/2 DCV
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
4/2 Direction Control Valve
4-2 Directional control valve.mp4 rotary spool directional valves work.mp4
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Sliding Spool type 4/3 DCV
Rotary Spool type 4/3 DCV
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
4/3 Direction Control Valve
4-3 Directional control valve.mp4
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Sliding Spool type 5/2 DCV
Rotary Spool type 5/2 DCV
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
5/2 Direction Control Valve
5 2 valve .mp4
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Method of Actuation and there Symbol
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Variable Restriction FCV FCV with Reverse Free Flow
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Flow Control Valve
Fixed Restriction FCV
Flow control valves work.mp4
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Quick Exhaust Valve Cam operated FCV with integral check valve
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Camshaft _ Valve Animation .mp4
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1.Time Delay Valve 2. Shuttle Valve
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Special Type Valves
Shuttle valve .mp4
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3.Twin Pressure Valve 4. Quick Exhaust Valve
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Special Type Valves
Pilot Operated Relief Valve Animation.mp4
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Classification of Actuators
2. Rotating Cylinder
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Single acting cylinder Double acting cylinder
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Single Acting Cylinder.mp4Double Acting Cylinder.mp4
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Diaphragm cylinder Double rod end cylinder
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Diaphragm Cylinder.mp4
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Tandem cylinder Cylinder with cushioning
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Tandem Cylinder .mp4
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Telescope cylinder Cylinder Mountings
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Telescopic cylinder 2.mp4
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A) Vane type B) Piston type (Rack and pinion type
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Rotary Actuators
Piston type Actuator.mp4Vane Actuator.wmv.mp4
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External Gear Motor Radial Piston Motor
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
EXTERNAL GEAR PUMP.mp4 Internal Gear Pump.3gp
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Gerotor Motor Vane type Motor
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
Gerotor Operation.mp4
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Axial Piston Motor
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
SWASH PLATE PISTON PUMP .mp4
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a) Rigid pipe: Cast iron, Low carbon steel, Alloy steels, stainless steel, Copper and its alloy, Aluminum and its alloy. b) Flexible hoses : Nylon braided hoses, steel wire reinforced rubber hoses, poly-urethene tubes, Nylon tubes, polyethylene tubes, PVC tubes, polypropylene etc.a)According to strength:
Standard pipe (STD), Extra strong pipe(XS), Double Extra strong Pipe (XXS).
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Flexible Hose
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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a) According to method of sealing: 1. Positive seal: perfect seal, 100 % leak proof. 2. Non- positive seal: allow small amount of leakage.b) According to application: 1. Steel seal : used between mating parts having no relative motion. E.g. sealing between flange, gasket etc. 2. Dynamic seal: used between mating parts with relative motion.E.g. rotary motion seal between pump shaft and casing.a)According to shape configuration:
O-ring, quad-ring, T-ring, V-ring, U-cap, Hat ring etc.
B.P.P. Kalamb-Walchandnagar Prof.
Kokare A.Y.
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Following are the reason for failure of hydraulic seals.Excessive heat.Excessive load.Excessive clearance.Excessive pressure.Improper fitting.Improper groove gravity.Improper filter rating.Contamination of fluid.Idle storage of sealsAge hardening.Abrasion.
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.
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Thank youThank you
B.P.P. Kalamb-Walchandnagar Prof. Kokare A.Y.