軸承吹塵吹砂試驗箱
參照標準：MIL-STD-810G
the DUT is operated with a scoop. Heat exchangers and baffle plates must not be used
Figure 14: Schematic setup of the sand test bed (M:drive for external fan)
The test chamber must be designed in such a way that no sand is deposited in the testing space.
The volume of the test chamber upstream of the DUT must be at least 900 liters; a distance of at least 1000 mm must be adhered to between the air intake and the DUT.
Operating variable Value unit specification
Piping cross section Diameter 250 mm
Flow rate (without sand)
Center of test chamber upstream of the DUT at least 60 km/h with the fan at a standstill (or 65 km/h at Nmax)
Sand grain size 0.4~0.8 mm as per DIN EN 12904
Sand mass 10 kg
Table 11: Operating variables/parameters for sand test bed
