Experiment No :03 Test on linear /rotary actuator

Expt No :03   Test on  linear /rotary actuator

Aim: Test on  linear actuator

Apparatus:  Automation studio Software 5.7/ Festo Fluid Sim

Theory:

Hydraulic actuators are devices used to convert pressure energy of the fluid into mechanical energy.  Depending on the type of actuation, hydraulic actuators are classified as follows:

       1. Linear actuator: For linear actuation (hydraulic cylinders).

       2. Rotary actuator: For rotary actuation (hydraulic motor).

       3. Semi-rotary actuator: For limited angle of actuation (semi-rotary actuator).

Hydraulic cylinders extend and retract a piston rod to provide a push or pull force to drive the external load along a straight-line path.

In this experiment we will see the behavior of piston in two different ways.

 A)  Cylinder Inclination Test    B)  Cylinder Diameter and Load Test 

 In Cylinder Inclination test both the pistons will have the same parameters,  except cylinder Inclination. The First cylinder is without any inclination and second will have 90 degree inclination. We have to check the behavior of both the cylinders while extraction and its pressure readings

Cylinder Inclination Test		Cylinder Diameter and Load Test
1ST Cylinder Parameters	2nd  Cylinder Parameters	1st Cylinder Parameters	2nd  Cylinder Parameters
Piston Diameter (D) = 50 mm Rod Diameter (d) = 25 mm  Stroke = 0.5  m  External Load  = 10 N   Inclination = 0 degree	Piston Diameter (D) = 50 mm Rod Diameter (d) = 25 mm  Stroke = 0.5  m  External Load  = 10 N  Inclination = 90 degree	Piston Diameter (D) = 50 mm Rod Diameter (d) = 25 mm  Stroke = 0.5  m  External Load  = 10 N    Inclination = 90 degree	Piston Diameter (D) = 40 mm Rod Diameter (d) = 25 mm  Stroke = 0.5  m  External Load  = 10 N   Inclination = 90 degree

Fig : Cylinder Diameter and Load Test

Fig :Cylinder Inclination Test    

Click on this link to understand Hydraulic Cylinder Inspection

Observation Table:

Cylinder Inclination Test   

Both cylinder are identical:

Piston Diameter (D) = 10 cm , Rod Diameter (d) = 5 cm, Stroke = 1 m  , external Load  = 6300 Kg

Sr No	Position of Cylinder	Ext. Load	Extension Pressure
1	Horizontal	10N
2	Vertical	10N

Cylinder Diameter and Load Test

Sr No	Position of Cylinder	Piston Diameter	Rod Diameter	Ext. Load	Stroke	Extension Pressure
1	Vertical	50mm	25mm	10N	0.5m
2	Vertical	40mm	25mm	10N	0.5m

Conclusion:  

Cylinder Inclination Test:

1.      In Simulation you can see that first Circuit is showing  ________ bar pressure while extraction of the Cylinder, and second Cylinder is showing _______ bar Pressure during Extraction. 

2.      So due to 90⁰inclination of the Cylinder in Second Circuit, System requires Higher pressure to push the Cylinder, since Gravitational force is acting on the Load applied on Cylinder.

Cylinder Diameter and Load Test:

1.      In the first circuit, Piston is unable to push the load and extract, whereas in the Second Circuit, Piston is able to push the Load because of a Higher Piston Diameter of _________mm.

2.    In this experiment load is same on both the piston but due to different diameters they are showing different Load handling Capacities.