High pressure feeder having smooth pocket in rotor
AssigneeAndritz Inc.
InventorJ. Robert Prough
Life of this patent
Estimating the term…
Abstract
A high pressure transfer device has a rotor mounted in a housing for rotation with respect to inlet and outlet ports and having through going pockets. The pockets have interior surface configurations substantially devoid of nooks, crannies, and related flow restrictions. This can be accomplished by providing inserts in the pockets, or by constructing the pockets so that there are substantially smooth interior wall tubes extending from one end of the rotor and the other and cooperating with an inlet and an outlet at the same time. Using the high pressure transfer device to feed wood chips or the like in a slurry using a high pressure transfer pump can result in flow through the rotor pockets that is more uniform by at least 5% compared to in conventional high pressure transfer devices.
Claims20
A high pressure transfer device comprising:
- a housing;
- a pocketed rotor containing a plurality of through going pockets, said rotor rotatable about a given axis of rotation and said pockets having opposite end openings which function as both inlets and outlets depending upon the angular position of the rotor and said pockets are provided in at least first and second sets;
- a housing enclosing said rotor, said housing having an exterior periphery and first through fourth ports disposed around the exterior periphery thereof for registry with the inlets to and outlets from said through going pockets, for each set;
- for each set said first port being opposite said third port;
- and said second port opposite said fourth port;
- said rotor mounted in said housing for rotation with respect to said ports about said given axis of rotation;
- and
- said pockets having an interior surface configuration substantially devoid of nooks, crannies, and related flow restrictions.
A high pressure transfer device comprising:
- a housing;
- a pocketed rotor containing a plurality of through going pockets, said rotor rotatable about a given axis of rotation and said pockets having opposite end openings which function as both inlets and outlets depending upon the angular position of the rotor and said pockets are provided in at least first and second sets, with the pockets in each set offset from the pockets in the at least one other set;
- a housing enclosing said rotor, said housing having an exterior periphery and first through fourth ports disposed around the exterior periphery thereof for registry with the inlets to and outlets from said through going pockets, for each set;
- for each set said first port being opposite said third port;
- and said second port opposite said fourth port;
- said rotor mounted in said housing for rotation with respect to said ports about said given axis of rotation;
- and
- said pockets defined by substantially smooth interior wall tubes.
A high pressure transfer device comprising:
- a housing;
- a pocketed rotor containing a plurality of through going pockets, said rotor rotatable about a given axis of rotation and said pockets having opposite end openings which function as both inlets and outlets depending upon the angular position of the rotor and said pockets are provided in at least first and second sets;
- a housing enclosing said rotor, said housing having an exterior periphery and first through fourth ports disposed around the exterior periphery thereof for registry with the inlets to and outlets from said through going pockets, for each set;
- for each set said first port being opposite said third port;
- and said second port opposite said fourth port;
- said rotor mounted in said housing for rotation with respect to said ports about said given axis of rotation;
- and
- said pockets filled at side portions thereof with flow precluding inserts.
A method of enhancing the flow transfer characteristics of a high pressure transfer device comprising:
- a high pressure transfer device comprising:
- a housing;
- a pocketed rotor containing a plurality of through going pockets, the rotor rotatable about a given axis of rotation and the pockets having opposite end openings which function as both inlets and outlets depending upon the angular position of the rotor and the pockets are provided in at least first and second sets;
- a housing enclosing the rotor, the housing having an exterior periphery and first through fourth ports disposed around the exterior periphery thereof for registry with the inlets to and outlets from the through going pockets, for each set;
- for each set the first port being opposite the third port;
- and the second port opposite the fourth port;
- the rotor mounted in the housing for rotation with respect to the ports about the given axis of rotation;
- said method comprising:
- (a) substantially filling the nooks, crannies, and related flow restrictions in the pockets to provide a more uniform flow area through the pockets;
- and
- (b) rotating the rotor about its axis while causing a low pressure slurry to flow from the second port through the rotor pockets to the fourth port, and causing a high pressure liquid to flow from the first port through the rotor pockets to the third port.
A method of constructing and operating a high pressure transfer device comprising a housing having opposite first and third ports, and opposite second and fourth ports and a rotor mounted for rotation within the housing, said method comprising:
- (a) providing at least two tubes defining substantially smooth interior wall through extending pockets in the rotor;
- and
- (b) rotating the rotor about its axis while causing a low pressure slurry to flow from the second port through the rotor pockets to the fourth port, and causing a high pressure liquid to flow from the first port through the rotor pockets to the third port.
Dependencies are inferred from the claim text.