Compression apparatus and method
First Claim
1. A power transmission apparatus for a compression stage in a compressor for loose packed materials the compressor having a first compression stage and a second compression stage, said power transmission apparatus comprising:
- a compressor piston of the second compression stage, said compressor piston being shaped to extend about at least a portion of the first compression stage and to be reciprocally movable with respect thereto;
said compressor piston having a first end and a second end;
said first end of said compressor piston being an output end thereof, and being shaped to conform to a co-operating mating cylinder within which said compressor piston is mounted to reciprocate in a longitudinal direction;
said second end being distant from said first end;
said power transmission apparatus having a power input interface at which motive force is applied to said compressor piston, said power input interface being movable;
said power input interface having a fixed position relative to said first end of said compressor piston;
said power transmission apparatus having a stationary reaction datum, said compressor piston being movable in longitudinal reciprocation relative to said stationary reaction datum;
said power transmission apparatus having a drive transmission that is free of slack between said power input interface and said first end of said compressor piston;
said power input interface being driven along a single degree of freedom of motion relative to said stationary reaction datum.
6 Assignments
0 Petitions
Accused Products
Abstract
An apparatus is provided for compressing a loose solid feedstock. The apparatus includes a two stage compressor. The first compression stage is a screw compressor. The second compressor stage is a reciprocating compressor. The reciprocating compressor operates co-axially with, and receives its feed from, the screw compressor. A choke cone maintains pressure in the outfeed from the compressor stages. The reciprocating compressor includes a piston that is driven by a pair of hydraulic rams. The position and operation of the hydraulic rams, the screw conveyor, and the choke cone is monitored by sensors. The reciprocating compressor, the screw conveyor, and the choke cone are all adjustable in real time to control the compression of the feedstock according to a pre-programmed schedule that need not have equal compression and retraction strokes. The operation of the screw conveyor may be advanced or eased off depending on the motion of the reciprocating compressor. The operation of the choke cone may be actively controlled to obtain a coordination with the compressor stages.
45 Citations
35 Claims
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1. A power transmission apparatus for a compression stage in a compressor for loose packed materials the compressor having a first compression stage and a second compression stage, said power transmission apparatus comprising:
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a compressor piston of the second compression stage, said compressor piston being shaped to extend about at least a portion of the first compression stage and to be reciprocally movable with respect thereto; said compressor piston having a first end and a second end; said first end of said compressor piston being an output end thereof, and being shaped to conform to a co-operating mating cylinder within which said compressor piston is mounted to reciprocate in a longitudinal direction; said second end being distant from said first end; said power transmission apparatus having a power input interface at which motive force is applied to said compressor piston, said power input interface being movable; said power input interface having a fixed position relative to said first end of said compressor piston; said power transmission apparatus having a stationary reaction datum, said compressor piston being movable in longitudinal reciprocation relative to said stationary reaction datum; said power transmission apparatus having a drive transmission that is free of slack between said power input interface and said first end of said compressor piston; said power input interface being driven along a single degree of freedom of motion relative to said stationary reaction datum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power transmission apparatus for a compression stage in a compressor for loose packed materials the compressor having a first compressor stage and a second compressor stage, said power transmission apparatus comprising:
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a compressor piston of the second compressor stage, said compressor piston being shaped to extend about at least a portion of the first compressor stage and to be reciprocally movable with respect thereto; said compressor piston having a first end and a second end; said first end of said compressor piston being an output end thereof, and being shaped to conform to a co-operating mating cylinder within which said compressor piston is mounted to reciprocate in a longitudinal direction; said second end being distant from said first end; said power transmission apparatus having a power input interface at which motive force is applied to said compressor piston, said power input interface being movable; said power input interface having a fixed position relative to said first end of said compressor piston; said power transmission apparatus having a stationary reaction datum, said compressor piston being movable in longitudinal reciprocation relative to said stationary reaction datum; said power input interface being driven along a single degree of freedom of motion relative to said stationary reaction datum; said power transmission apparatus includes a head and a plurality of power transmission members; said second end of said compressor piston being mounted to said head, said head extending transversely of said second end of said compressor piston; said plurality of power transmission members are each movably mounted to a stationary power input apparatus; said power transmission members are connected to said head; each said power transmission member is slackless between said stationary power input apparatus and said second end of said compressor piston; and said power transmission members are each restricted to a single degree of freedom of motion from said stationary power input apparatus to said head. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A two stage compressor feed apparatus operable to compress loose feedstock material, said feed apparatus comprising:
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a first compressor stage and a second compressor stage; said first compressor stage having a screw, said screw having a volute operable to drive the feedstock forward in an axial direction while compressing the feedstock; said second compressor stage having a compressor piston mounted to reciprocate in the axial direction, said compressor piston having an axial accommodation permitting an end of said screw to extend therethrough; said second compressor stage having a stator and rams mounted to said stator in a rigidly fixed orientation parallel to said axial direction; said second compressor stage having a cylinder mounted to said stator, said cylinder being a mating cylinder for co-operation with said compressor piston; said compressor piston of said second compressor stage having a first end and a second end; said second compressor stage includes a head; said second end of said compressor piston being mounted in a fixed orientation to said head; said first end of said compressor piston being distant from, and being oriented to face away from, said head; said rams including shafting extending to said head, said shafting constraining said head to a fixed orientation cross-wise to said axial direction; said rams, said head and said compressor piston are slacklessly connected; and said rams being constrained to a single degree of freedom of motion in linear translation parallel to said axial direction between said stator and said head. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35)
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34. A compressor for loose packed materials the compressor comprising:
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a first compression stage and a second compression stage; said first and second compression stages being mounted to work together in parallel; a discharge region downstream of said first and second compression stages toward which, in operation, said first and second compressor stages urge the loose-packed materials; said first compression stage having a screw, said screw having a proximal end and a distal end; said distal end of said screw being downstream of said proximal end of said screw relative to the direction of advance of the loose-packed material in operation; a drive connected to operate said screw;
said distal end of said screw overlapping an upstream end of said discharge;said second compression stage including a compressor piston shaped to extend about at least a portion of the first compression stage screw and to be reciprocally movable with respect thereto; a power transmission apparatus connected to drive said second compression stage;
said compressor piston having a first end and a second end;
said first end of said compressor piston being an output end thereof, and being shaped to conform to a co-operating mating cylinder within which said compressor piston is mounted to reciprocate in a longitudinal direction;in operation said first end of said compressor piston reciprocating axially within said co- operating mating cylinder and terminating its stroke upstream of said discharge, said distal end of said screw protruding beyond said first end of said piston; said second end or said piston being upstream-wise distant from said first end; said power transmission apparatus having a power input interface at which motive force is applied to said compressor piston, said power input interface being movable; said power input interface having a fixed position relative to said first end of said compressor piston; said power transmission apparatus having a stationary reaction datum, said compressor piston being movable in longitudinal reciprocation relative to said stationary reaction datum; said power input interface being driven along a single degree of freedom of motion relative to said stationary reaction datum.
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Specification