| 摘要 |
A testing apparatus includes a crosshead and a head assembly. The head assembly includes a head cover having an interior volume. An electric actuator, controls and other electric components are located within the interior volume, wherein the motor, controls and other electric components generates heat when energized. A divider within the interior volume separates a first volume from a second volume. The first volume includes the heat generating electric motor, controls and electric components and the second volume contains substantially no heat generating components. The head assembly includes at least one fan within the second volume that draws cool air from outside the head cover and forces the cool air through the second volume and into the first volume to remove heat. |
