Hydraulic flow-rate regulating device

摘要

The regulating device (1) comprises a body (2) including a hub (3) which has a first end (3a) connected to a surrounding ring (4), such as to define therebetween at least one passage (6) for the fluid, between the upstream and downstream regions, and the other or second end (3b) of which protrudes with respect to the ring (4). The ring (4) has, on a surface thereof, an annular distribution of projections (7). On the second end (3b) of the hub (3) there is mounted a flexible, ring-shaped, regulating member (8) facing and spaced from the tops of said projections (7) and capable during use of resiliently flexing towards them as a result of and depending on the difference in pressure between the upstream and downstream regions. The ring (4) is further provided with a plurality of restricted holes (10) having a fluid flow parallel to the at least one passage (6). These restricted holes (10) are formed essentially in the same radial portion (C) of the ring (4) in which the projections (7) are provided such that the holes (10) are circumferentially and radially comprised each between a pair of projections (7).

主权项

1. Hydraulic flow-rate regulating device (1) intended to be mounted in a conduit between a hydraulic fluid source and a user device, and comprising
a body (2) including a central axial hub (3) which has a first end (3a) connected to a surrounding ring (4), such as to define therebetween at least one passage (6) for the hydraulic fluid, between the upstream and downstream regions, and the other or second end (3b) of which protrudes with respect to the ring (4) from the side facing the source during use; the ring (4) having, on the surface thereof which during use is directed towards the source, an annular distribution of projections (7); on said other end (3b) of the hub (3) there being mounted a flexible, ring-shaped, regulating member (8) facing and spaced from the tops of said projections (7) and capable during use of resiliently flexing towards said projections (7) as a result of and depending on the difference in pressure between said upstream and downstream regions; the ring (4) being further provided with a plurality of restricted holes (10) having a fluid flow parallel to said at least one passage (6); wherein said restricted holes (10) are provided essentially in the same radial portion (C) of the ring (4) in which there is provided said plurality of projections (7), such that said holes (10) are circumferentially and radially comprised each between a pair of projections (7); and wherein each restricted hole (10) has an essentially L-shaped section, with an inlet portion Of branch (10c) which extends essentially in a radial direction, and an outlet portion or branch (10d) which extends essentially in a direction parallel to the axis of the hub (3).