Methods for restricting backflow of solids in a pump assembly

摘要

A pump assembly includes a rotating component and a stationary component coupled to the rotating component such that the stationary component substantially circumscribes at least a portion of the rotating component. A high pressure outlet extends at least partially through the rotating and stationary components. An inlet is positioned a predefined distance from the high pressure outlet. The inlet extends at least partially through the rotating and stationary components. A solid fuel flow is channeled from the inlet to the outlet as the rotating component rotates. A flow control member is coupled to the rotating and stationary components in a first predefined position. The flow control member is selectively moveable from the first predefined position to a second predefined position to form a seal within the pump assembly such that the solid fuel flow and a fluid flow are substantially restricted from being channeled back into the inlet.

主权项

1. A pump assembly comprising:
a rotating component; a stationary component coupled to said rotating component such that said stationary component substantially circumscribes at least a portion of said rotating component; a high pressure outlet extending at least partially through each of said rotating component and said stationary component; an inlet positioned a predefined distance from said high pressure outlet, said inlet extends at least partially through each of said rotating component and said stationary component, a solid fuel flow is channeled from said inlet to said high pressure outlet as said rotating component rotates; and a flow control member coupled to said rotating and stationary components in a first predefined position, said flow control member is selectively moveable from the first predefined position to a second predefined position to form a seal within said pump assembly such that the solid fuel flow and a fluid flow are substantially restricted from being channeled back into said inlet.