| 摘要 |
FIELD: electric engineering, in particular, electric linear final-control units with periodic variation in direction of rod motion. SUBSTANCE: device has electric motor, worm gear which converts rotation to linear movement, and pneumatic pump which cools housing of electric drive. Bearing shields 4 and 5 of electric motor has flanges 8 and 9 which are connected to housing 10. Ends of running worm 7 has pistons 12 and 13. Both flanges 8, 9 and pistons 12 and 13 have through axial holes which goes in reverse direction with respect to pneumatic valves 14, 15, 16 and 17 which are located in them and are open in direction from housing to over-travel of worm. EFFECT: increased efficiency due to better ventilation. 1 dwg |
