Star feeder with comminuting insert
A star feeder for conveying all types of bulk materials having a comminuting insert for crushing bulk material agglomerates ( 29 ). Bulk material agglomerates are conveyed into the inlet of the star feeder ( 1 ) and there pass through the comminuting insert ( 10 ), which comprises at least one shearing wall ( 20 ), which includes at least two mutually angled shearing surfaces ( 21, 22 ), which widen upward, toward the inlet direction ( 11 ) and meet centrally in the region of at least one feed edge ( 23 ).
1. A star feeder for crushing bulk material agglomerates comprising
a rotary star wheel and a removable comminuting insert, the comminuting insert having a side wall formed as a substantially cylindrical shell, and having at least one shearing wall positioned at an inside surface of the side wall,
wherein the at least one shearing wall comprises at least two adjoining and mutually angled shearing surfaces, each extending at an acute angle from the side wall, and
wherein the at least one shearing wall further comprises a bottom surface abutting the sidewall, such that a shearing edge is formed where a shearing surface meets the bottom surface, and
whereby the crushing of bulk material agglomerates occurs between a surface of the rotary star wheel and a surface of the comminuting insert.
2. The star feeder as claimed in claim 1 , wherein the at least one shearing wall is an integral component of the comminuting insert.
3. The star feeder as claimed in claim 1 , further comprising a housing and an inlet,
wherein the comminuting insert is positioned by flush insertion into the inlet, and
wherein the comminuting insert is removable.
4. The star feeder as claimed in claim 3 , wherein the comminuting insert, reduces the cross-sectional area of the star feeder inlet.
5. The star feeder as claimed in claim 1 , further comprising a drive motor coupled to a rotary star wheel shaft that is configured to actuate the rotary star wheel,
wherein the rotary star wheel comprises a plurality of evenly distributed star wheel chambers interspersed with a plurality of star wheel webs,
the comminuting insert further comprising an angled side wall portion located in a diametrically opposed position relative to the shearing wall,
wherein the rotary star wheel is disposed below the comminuting insert and abutting the comminuting insert, such that upon actuation of the rotary star wheel by the drive motor in either rotational direction, agglomerates passing through the comminuting insert are crushed between the rotary star wheel and either one of the angled side wall portion or the shearing surface.
6. The star feeder as claimed in claim 5 , wherein the shearing wall and angled side wall portion are disposed in the region abutting the outer circumference of the rotary star wheel, such that agglomerates may only pass through the star feeder by fitting into star wheel chamber of the rotary star wheel.
7. The star feeder as claimed in claim 1 , wherein the shearing wall comprises at least three adjacent and mutually angled shearing surfaces, thereby providing at least three corresponding shearing edges.
8. The star feeder as claimed in claim 1 , wherein the shearing surfaces are curved.
9. The star feeder as claimed in claim 1 , wherein the shearing surfaces are flat.
10. The star feeder as claimed in claim 1 , wherein said acute angle inclines the shearing surface approximately 20° from the sidewall.