Reversible refiner feeder

Claim 2

In a disc type refiner for high consistency stock comprising a frame, a refiner shaft rotatably supported on said frame, a rotor mounted on said shaft for rotation therewith, a nonrotating head mounted on said frame, and refining plates mounted in juxtaposed relation on said rotor and said nonrotating head to produce a refining action on stock introduced therebetween upon rotation of said drive shaft, the improvement comprising reversible conveyor means for introducing stock into the space between said refining plates, said conveying means comprising a substantially cylindrical conveying chamber surrounding said drive shaft adjacent said rotor in coaxial relation thereto, a plurality of conveying lugs fixed to said drive shaft and extending into said conveying chamber, said conveying lugs each having a pair of intersecting faces oppositely angularly inclined with respect to the drive shaft axis, the lug edge formed by said intersecting faces being directed toward said rotor, and conduit means for introducing stock into said conveying chamber, said lugs upon rotation of said drive shaft serving to advance stock introduced into said conveying chamber toward said rotor for passage between said plates regardless of the direction of the shaft rotation.

Claim 3

The invention as claimed in claim 1 including a steam discharge conduit communicating with said conveying chamber, said steam discharge conduit being axially outwardly spaced with respect to said stock inlet conduit means from said rotor.

Claim 4

The invention as claimed in claim 1 wherein said conveying lugs are arranged in evenly spaced relation in axially aligned rows, the lugs of each row being axially staggered with respect to the lugs of the adjacent rows.

Claim 5

The invention as claimed in claim 1 wherein said conveying lugs extend substantially radially outWardly from said drive shaft.

Claim 6

The invention as claimed in claim 1 including a conveyor sleeve secured to said drive shaft, said conveying lugs being mounted on said conveyor sleeve.

Claim 7

The invention as claimed in claim 1 wherein said conveying lugs are triangular in section.

Claim 8

The invention as claimed in claim 6 wherein said conveying lugs in section each comprise an isosceles triangle with the apex of the equilength edges thereof being directed toward said rotor.

Claim 9

In a disc type refiner for high consistency stock comprising a frame, a refiner shaft rotatably supported on said frame, a rotor mounted on said shaft for rotation therewith, a non-rotating head mounted on said frame, means for rotating said shaft and rotor, and refining plates mounted in juxtaposed relation on said rotor and said non-rotating head to produce a refining action on stock introduced therebetween upon rotation of said drive shaft, the improvement comprising reversible conveyor means for introducing stock into the space between said refining plates, said conveying means comprising a conveyor housing defining a cylindrical conveying chamber surrounding said drive shaft adjacent said rotor in coaxial relation thereto, seal means axially spaced from said rotor extending between said shaft and said housing for sealing one end of said conveying chamber, said conveying chamber extending axially between said seal means and said rotor, a stock inlet conduit for introducing stock to be refined into said conveying chamber intermediate said rotor and said seal means, a steam discharge conduit communicating with said conveying chamber axially disposed between said seal means and said stock inlet conduit, a plurality of conveying lugs extending from said drive shaft within said conveying chamber, said conveying lugs each having a pair of intersecting faces angularly inclined with respect to the axis of said drive shaft, the lug edge formed by said intersecting faces being directed toward said rotor, said lugs upon rotation of said drive shaft serving to advance stock introduced into said conveying chamber through said stock inlet conduit toward said rotor for passage between said plates regardless of the direction of shaft rotation, the conveyed stock being centrifugally directed around the periphery of said conveying chamber to permit passage of steam from said refining plates between said lugs adjacent said shaft to said steam discharge conduit.

Claim 10

In a disc type refiner for high consistency stock comprising a frame, a refiner shaft rotatably supported on said frame, a rotor mounted on said shaft for rotation therewith, a non-rotating head mounted on said frame, means for rotating said shaft and rotor, and refining plates mounted in juxtaposed relation on said rotor and said non-rotating head to produce a refining action on stock introduced therebetween upon rotation of said drive shaft, the improvement comprising reversible conveyor means for introducing stock into the space between said refining plates, said conveying means comprising a conveyor housing defining a cylindrical conveying chamber surrounding said drive shaft adjacent said rotor in coaxial relation thereto, seal means axially spaced from said rotor extending between said shaft and said housing for sealing one end of said conveying chamber, said conveying chamber extending axially between said seal means and said rotor, a stock inlet conduit for introducing stock to be refined into said conveying chamber intermediate said rotor and said seal means, a steam discharge conduit communicating with said conveying chamber axially disposed between said seal means and said stock inlet conduit, a plurality of conveying lugs extending from said drive shaft within said conveying chamber, said conveying lugs each having a pair of intersecting faces angularly inclined with respect to the axis of said drive shaft, the lug edge formed by said intersecting faces being directed toward said rotor, said lugs upon rotation of said drive shaft serving to advance stock introduced into said conveying chamber through said stock inlet conduit toward said rotor for passage between said plates regardless of the direction of shaft rotation, the conveyed stock being centrifugally directed around the periphery of said conveying chamber to permit passage of steam from said refining plates between said lugs adjacent said shaft to said steam discharge conduit.

Claim 11

The invention as claimed in claim 8 wherein said conveying lugs are arranged in evenly spaced relation in axially aligned rows, the lugs of each row being axially staggered with respect to the lugs of the adjacent rows.

Claim 12

The invention as claimed in claim 8 wherein said conveying lugs extend substantially radially outwardly from said drive shaft.

Claim 13

The invention as claimed in claim 8 including a conveyor sleeve secured to said drive shaft, said conveying lugs being mounted on said conveyor sleeve.

Claim 14

The invention as claimed in claim 8 wherein said conveying lugs are triangular in section.

Claim 15

The invention as claimed in claim 12 wherein said conveying lugs in section each comprise an isosceles triangle with the apex of the equilength edges thereof being directed toward said rotor.

Claim 16

In a disc type refiner for high consistency stock comprising a frame, a refiner shaft rotatably supported on said frame, a rotor mounted on said shaft for rotation therewith, a non-rotating head mounted on said frame, reversible means for driving said shaft in rotation, and refining plates mounted in juxtaposed relation on said rotor and said non-rotating head to produce a refining action on stock introduced therebetween upon rotation of said drive shaft, the improvement comprising reversible conveyor means for introducing stock into the space between said refining plates, said conveying means comprising a substantially cylindrical conveyor housing surrounding said drive shaft adjacent said rotor in coaxial relation thereto, seal means extending bEtween said housing and said drive shaft axially spaced from said rotor, a conveyor sleeve secured to said drive shaft and extending between said rotor and said seal means, said conveyor sleeve, coaxial cylindrical housing, seal means and rotor defining therebetween a conveying chamber, said conveying chamber opening at the rotor end thereof into the refiner throat through which the stock passes into the refining region between the juxtaposed plates, a stock inlet conduit for introducing stock into said conveying chamber, a steam discharge conduit communicating with said conveying chamber intermediate said stock inlet conduit and said seal means, and a plurality of conveying lugs extending radially from said conveyor sleeve, said conveying lugs in section each comprising an isosceles triangle with the apex of the equilength edges thereof being directed toward said rotor, said conveying lugs being arranged in evenly spaced relation in axially aligned rows, the lugs of each row being axially staggered with respect to the lugs of the adjacent rows, said conveying lugs upon rotation in either direction of said shaft serving to advance stock introduced into said conveying chamber toward the refiner throat, the centrifugal force of the rotating lugs serving to advance the stock around the periphery of said conveying chamber permitting steam from the refining zone to pass along said conveyor sleeve between said lugs into said steam discharge conduit without interfering with the flow of stock into the refiner throat.

Claim 17

In a disc type refiner for high consistency stock comprising a frame, a refiner shaft rotatably supported on said frame, a rotor mounted on said shaft for rotation therewith, a non-rotating head mounted on said frame, reversible means for driving said shaft in rotation, and refining plates mounted in juxtaposed relation on said rotor and said non-rotating head to produce a refining action on stock introduced therebetween upon rotation of said drive shaft, the improvement comprising reversible conveyor means for introducing stock into the space between said refining plates, said conveying means comprising a substantially cylindrical conveyor housing surrounding said drive shaft adjacent said rotor in coaxial relation thereto, seal means extending bEtween said housing and said drive shaft axially spaced from said rotor, a conveyor sleeve secured to said drive shaft and extending between said rotor and said seal means, said conveyor sleeve, coaxial cylindrical housing, seal means and rotor defining therebetween a conveying chamber, said conveying chamber opening at the rotor end thereof into the refiner throat through which the stock passes into the refining region between the juxtaposed plates, a stock inlet conduit for introducing stock into said conveying chamber, a steam discharge conduit communicating with said conveying chamber intermediate said stock inlet conduit and said seal means, and a plurality of conveying lugs extending radially from said conveyor sleeve, said conveying lugs in section each comprising an isosceles triangle with the apex of the equilength edges thereof being directed toward said rotor, said conveying lugs being arranged in evenly spaced relation in axially aligned rows, the lugs of each row being axially staggered with respect to the lugs of the adjacent rows, said conveying lugs upon rotation in either direction of said shaft serving to advance stock introduced into said conveying chamber toward the refiner throat, the centrifugal force of the rotating lugs serving to advance the stock around the periphery of said conveying chamber permitting steam from the refining zone to pass along said conveyor sleeve between said lugs into said steam discharge conduit without interfering with the flow of stock into the refiner throat.