| 摘要 |
<p>1. Brake governor, comprising a block (1) traversed by a boring (2) with a step (3), this boring being closed at one of its ends by a plug (4), and comprising a valve piston disposed coaxially in said boring and containing at one of its ends a piston (5) which extends to the outside and which is submitted to a counter-force (F), and at its other end a valve (5b), a movable annular wall (6), the displacement of which is restricted by at least a first stop (7) and which is disposed coaxially in the stepped boring for defining a first (12) and a second chamber (13) which communicate with each other and which are respectively connected to inlet and outlet openings (10, 11), the central opening (6a) of said annular wall (6) which is traversed by the valve piston being furnished with a valve seat (6b), characterized in that the sectional area (S1 ) of the piston (5) is substantially larger than the sectional area (S2 ) of the valve (5b), and that it comprises a return spring (9) for the annular wall (6), this spring being disposed in the outlet chamber between the closing plug (4) and that side of the wall which faces the plug.</p> |
