| 摘要 |
<p>The regulation cone (1) of the valve has a roll shape in principle and it is equipped with four grooves (2,3), having a shape of the capital V, on its rolling tangential surface, the cross-section of which is growing along the longitudinal axis closed to the regulation cone (1). Two of them are the primary grooves (2) passing along the total length of the regulation cone (1) and the second two of these grooves are the secondary grooves (3) passing along the part closed to the active length of the regulation cone (1), the primary grooves (2) of which have the greatest cross-section surface.</p> |
