| 摘要 |
A turbine wheel and speed reduction gear system rotate an output shaft in response to flow through a housing having an inlet and an outlet. The output shaft is connected to a flexible and resilient clutch cup that is engageable with a clutch and valve disk. The disk cooperates with a valve seat formed on a flow responsive piston to permit or prevent flow in a flow passage in the piston. When flow occurs, the clutch is clamped to the disk, and the piston and disk move downstream until a control member connected to the disk hits a stop. The valve is opened as the disk stops while the piston continues to move downstream. The clutch rotates the valve disk and control member, and if a maximum flow volume occurs, the control member rotates to an interrupt position and is released from the stop. The valve closes preventing further flow. Restricted passages from the clutch and across the valve seat disengage the clutch and permit a piston return spring to move the piston and valve upstream until the control member engages a reset cam that rotates the control member back to an initial position. The reset cam is carried by an adjustment collar that is moved to determine the initial position and therefore the maximum volume.
|
