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R&D department Test rig in Hydac SA PowerPoint PPT Presentation


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R&D department Test rig in Hydac SA. Situation 2001. Paolo 2 Test rig in Hydac. Time schedule. Power heat dissipation test rig Pulsation test rig VG 320 test rig. Paolo 3 Test rig in Hydac. Power heat dissipation Why this test rig. To measure : POWER HEAT DISSIPATION

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R&D department Test rig in Hydac SA

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R d department test rig in hydac sa

R&D department

Test rigin

Hydac SA


R d department test rig in hydac sa

Situation 2001

Paolo 2

Test rig in Hydac

Time schedule

  • Power heat dissipation test rig

  • Pulsation test rig

  • VG 320 test rig


R d department test rig in hydac sa

Paolo 3

Test rig in Hydac

Power heat dissipation

Why this test rig

  • To measure :

  • POWER HEAT DISSIPATION

  • PRESSURE DROP

  • on liquid/air coolers.

Analyse our and the competitors’

coolers to acquire know-how

and win on the market !


R d department test rig in hydac sa

  • Available motors :

  • Electrical AC until 6 kW (20..60 Hz)

  • Electrical DC until 32 V & 30 A

  • Hydraulic until 80 l/min & 180 bar

Paolo 4

Test rig in Hydac

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


R d department test rig in hydac sa

Paolo 5

Test rig in Hydac

Power heat dissipation

Tests following DIN/EN 1048

TÜV SÜDDEUTSCHLANDcertify that Hydac SA

makes the tests following the norm EN/ISO 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 mm2/s

  • to declare what we measure !


R d department test rig in hydac sa

Paolo 6

Test rig in Hydac

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 !


R d department test rig in hydac sa

Paolo 7

Test rig in Hydac

Pulsation

Why this test rig

To evaluate the matrix of liquid/air coolers in dynamic pressure.

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.

NEW


R d department test rig in hydac sa

Paolo 8

Test rig in Hydac

Pulsation

Technical data

Liquid : mineral oil VG22

Upper pressure range : 10..30 bar

Frequency range : 0,1..3 Hz

Ambient temperature max : 110 °C

We can test 1 big element (EL11) or 3 small (EL3).


R d department test rig in hydac sa

p

pu

p(T1)  pu

40% T  (TR + T1)  60% T

p(T2)  pl

pl

= 5% pu

t

T1 30% T

90% T1 T2 110% T1

TR

TF

T = 1 / f(f  3 Hz)

Paolo 9

Test rig in Hydac

Pulsation

Tests following ISO/DIS 10771-1

In the liquid/air coolers market, the matrix is characterised by tests which follow the norm ISO/DIS 10771-1.

Test code : ISO 10771-1-16/0.8 bar-107-2Hz/190ms

Means that the test had :

pu = 16 bar

Pl = 0.8 bar

N° cycles = 107

Frequency = 2 Hz

T1 (time for p > pu) = 190 ms


R d department test rig in hydac sa

Imagine a test like this. They can easily declare a test with :

f = 2 Hz

pu = 16 bar

and get results like 109 cycles!

p

pu

p(T1)  pu

40% T  (TR + T1)  60% T

p(T2)  pl

pl

= 5% pu

t

T1 30% T

90% T1 T2 110% T1

TR

TF

T = 1 / f(f  3 Hz)

Paolo 10

Test rig in Hydac

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 ?

This is also valid for the power heat dissipation tests.


R d department test rig in hydac sa

Paolo 11

Test rig in Hydac

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.

We had other requests from the lubrication systems and wind turbine gear box market: to test with a synthetic and high viscosity oil.

NEW


R d department test rig in hydac sa

Paolo 12

Test rig in Hydac

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


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