| 摘要 |
<p>The shaft for the flap of a fluid flow regulator extends through the tubular housing of the regulator and its end portions are received in thrust bearings which subject the shaft to axial stresses. The bearings have internally threaded sleeves which are bonded to the housing, externally threaded plastic plugs which mate with the respective sleeves and have sockets for the respective end portions of the shaft, and hard metallic balls in the innermost portions of the respective sockets. The flap has two mutually inclined sections at the opposite sides of the shaft and is biased to open position, in which one of its sections lies flush against a centrally located partition in the housing, by a helical spring whose characteristic can be changed from the outside of the housing.</p> |
