Presentation on theme: "R&D department Test rig in Hydac SA R&D department Test rig in Hydac SA."— Presentation transcript:
R&D department Test rig in Hydac SA R&D department Test rig in Hydac SA
Time schedule Power heat dissipation test rig Pulsation test rig VG 320 test rig Paolo 2 Test rig in Hydac Situation 2001
Power heat dissipation Why this test rig Power heat dissipation Why this test rig To measure : POWER HEAT DISSIPATION PRESSURE DROP on liquid/air coolers. Paolo 3 Test rig in Hydac Analyse our and the competitors’ coolers to acquire know-how and win on the market !
Power heat dissipation Technical data Power heat dissipation Technical data Liquid : mineral oil VG68 Flow max : 350 l/min Power max : 120 kW Inlet air temperature : ambient temperature Inlet liquid temperature max : 70 °C Paolo 4 Test rig in Hydac Available motors : Electrical AC until 6 kW ( Hz) Electrical DC until 32 V & 30 A Hydraulic until 80 l/min & 180 bar
Power heat dissipation Tests following DIN/EN 1048 Power heat dissipation Tests following DIN/EN 1048 This mean that the accuracy of instruments and the complete system is guaranteed. The variations of values, during a test, are : ± 0.2 °C for temperatures ± 0.02 bar for pressures ± 1 % for liquid flow rate to stay in the declared tolerances ! The tests are made at : inlet temperature drop = 40 °C oil viscosity = 30 mm 2 /s to declare what we measure ! Paolo 5 Test rig in Hydac TÜV SÜDDEUTSCHLAND certify that Hydac SA makes the tests following the norm EN/ISO 1048 !
Power heat dissipation Costs and improvements Power heat dissipation Costs and improvements A test takes in average 1 day to be done. An operator dedicated at 60 %, the power to heat the oil and the electricity to run fan, pumps and other elements are not the only cost that we have to assume. The certification from TÜV, to calibrate the probes and maintenance have to be summarised to the construction and the new improvemtns. We are looking at an investment to run completely automated tests, to make tests during the night too ! Paolo 6 Test rig in Hydac
Pulsation Why this test rig Pulsation Why this test rig To evaluate the matrix of liquid/air coolers in dynamic pressure. NEW Paolo 7 Test rig in Hydac We start this year to test with this rig. In the past this test was made with external resources. This was a problem because we lost know-how and to have the results we wanted was not always possible.
Pulsation Technical data Pulsation Technical data Liquid : mineral oil VG22 Upper pressure range : bar Frequency range : 0,1..3 Hz Ambient temperature max : 110 °C Paolo 8 Test rig in Hydac We can test 1 big element (EL11) or 3 small (EL3).
Pulsation Tests following ISO/DIS Pulsation Tests following ISO/DIS In the liquid/air coolers market, the matrix is characterised by tests which follow the norm ISO/DIS Test code : ISO /0.8 bar Hz/190ms Means that the test had : pu = 16 bar Pl = 0.8 bar N° cycles = 10 7 Frequency = 2 Hz T1 (time for p > pu) = 190 ms p t pu pl = 5% pu TR T1 30% T TF 90% T1 T2 110% T1 T = 1 / f (f 3 Hz) 40% T (TR + T1) 60% T p(T2) pl p(T1) pu Paolo 9 Test rig in Hydac
Test result Why follow a norm Test result Why follow a norm It is important that the data that is declared follows a norm, because otherwise it is impossible to compare values ! How can you win against competitors ? Imagine a test like this. They can easily declare a test with : f = 2 Hz pu = 16 bar and get results like 10 9 cycles! p t pu pl = 5% pu TR T1 30% T TF 90% T1 T2 110% T1 T = 1 / f (f 3 Hz) 40% T (TR + T1) 60% T p(T2) pl p(T1) pu Paolo 10 Test rig in Hydac This is also valid for the power heat dissipation tests.
VG320 Why this test rig VG320 Why this test rig During the integrated bypass project we saw that the viscosity was not sufficient to create the necessary pressure drop in the matrix. Now we are able to see the correct functionality of this particular element. NEW Paolo 11 Test rig in Hydac We had other requests from the lubrication systems and wind turbine gear box market: to test with a synthetic and high viscosity oil.
VG320 Technical data VG320 Technical data Liquid : mobilgear oil VG320 (sinthetic) Pressure max : 20 bar Flow rate max : 170 l/min Heat power : 4 kW Cooling power : 30 kW Paolo 12 Test rig in Hydac