Test Facilities for AMAGB
Endurance Test Rig (ETR) consists of a motor coupled with step-up gear box (20,000 rpm) connected to the test Aircraft Mounted Accessory Gear Box (AMAGB)through a power take off shaft and loaded on its output pads through water brake dynamometerto simulate the functional performance of various mission profiles.
Attitude test rig (ATR) is used to test the performance of gearbox by simulating the aircraft maneuvers like pitch and roll as per user specifications. The drive is provided by the pump in the gearbox instead of PTO shaft. The pump performance parameters are checked at various attitudes namely low oil pressure, delivery pressure and flow rate at outlet.
This test unit along with ETR is used to simulate the starting sequence test of Aircraft engine. Under this test setup, the JFS drive pad of AMAGB is driven by hydrostatic drive simulating the engine inertia during start up condition of aircraft engine.
Altitude chamber is used to simulate the dynamic performance of AMAGB under high altitude condition(16 km). The test set up is used to simulate the high altitude pressure condition inclusive of temperature simulation. Under this condition the performance of AMAGB lube pump and operation of AMAGB is tested.
Test Facilities for Hydraulic Filters
Extensive test facilities have been established at CVRDE as per International Standards of MIL- F- 8815D.
- Bubble point test rig
- Multi pass test rig
- Cold start test rig
- Collapse pressure test rig
- Impulse pressure test rig
- Proof pressure test rig
- Shut off valve test rig
- Ultrasonic cleaner
- Bottle flushing stand to clean the bottles to collect oil samples
- UCC Particle counters to check oil contamination level to find filtration efficiency
Test Facilities for PTO Shaft
The PTO shaft should be tested for its capability of transmitting with torque at high speed accommodating centrifugal stresses, acceleration and stress due to large axial and lateral misalignments by means of stringent endurance and environmental tests. The endurance testing of PTO shaft are carried out using custom designed test rigs positioned at AP Division of CVRDE . These endurance tests are to be conducted on continuous basis for the acceptance and Life extension of PTO shaft, in co-ordination with Air Worthiness Certifying Authorities (AWCA). The Back to Back Test Rig is a “state-of-art Technology” based test rig used to conduct Acceptance and Qualification tests of PTO shafts at AP Division. With the PTO shaft Torsional fatigue Test rig, Torsioanl fatigue testing of PTO shaft is carried out. The static thrust test rig used for the axial misalignment capability of PTO shaft,has precision guidance to apply the imposed load in line with the PTO shaft center without any resulting side load on the assembly. The Static torque test rig to check and verify the satisfactory performance of Torque carrying capability of PTO shaft without any permanent deformation. This Static torque test Rig is also used for conducting shear section test, which is an important test to qualify the shear bolts of the PTO shaft to fail within the predetermined toque range within narrow band of tolerance.
Test Facilities for Bearings
To carry out acceptance test and qualification test bearings, the test facilities such as vibration test rig, frictional torque test rig, static radial load test rig, endurance test rig, etc., are established.
Bearing endurance rig is used to evaluate the bearing performance by simulating the real application condition such as speed, loads. This test rig is capable of testing the bearings at high speed (20000 rpm) and high radial load (25 kN).
Static radial load test rig is established to test the static load capacity (65 kN) of bearings. Frictional Torque test rig is custom designed test rig to evaluate the rolling frictional force and frictional torque as per Mil standard.
Test Facilities for BLDC Generator
Generator Endurance Test rig is used to carry out Endurance test cycles on the 5 kW Generating system. The test rig comprises a variable speed motor with drive and an electrical load bank. The test rig features automated pre-programming of speed and load for various test schedule.
Test Facilities for Landing Gear
CVRDE established the following inhouse test facilities to test the Main landing gear and nose landing gear shock struts, Hydraulic actuator, landing gear controller and wire harnesses.
- MLG & NLG spring curve test
- Landing gear integration test facility
- Hydraulic actuator endurance Test facility
- Wire harnesses endurance test facility
- Landing gear controller ATE test facility