ROTATABLE COMPONENT OVERSPEED PROTECTION METHOD

摘要

An overspeed protection method for a machine having an engine drivably coupled to a pump is disclosed. The method includes determining a speed of a rotatable component connected to the engine based on an engine speed and determining a minimum power limit based on the speed of the rotatable component. The minimum power limit corresponds to a minimum power required to retard the engine in order to prevent an overspeed condition of the rotatable component. The method further includes determining a minimum flow limit based on a predetermined relationship between the minimum power limit and the minimum flow limit. The minimum flow limit corresponds to a required flow of the pump in order to provide the minimum power limit. The method further includes regulating the pump in order to achieve the minimum flow limit.

主权项

1. A rotatable component overspeed protection method for a machine having an engine drivably coupled to a pump, the method comprising:
determining a speed of a rotatable component connected to the engine based on an engine speed; determining a minimum power limit based on the speed of the rotatable component, wherein the minimum power limit corresponds to a minimum power required to retard the engine in order to prevent an overspeed condition of the rotatable component; determining a minimum flow limit based on a predetermined relationship between the minimum power limit and the minimum flow limit, wherein the minimum flow limit corresponds to a required flow of the pump in order to provide the minimum power limit; and regulating the pump in order to achieve the minimum flow limit.