Swing hammer for particulate size reduction system
The invention provides a particulate size reduction system including a grinding chamber, a center shaft defining an axis of rotation and configured for rotational motion within the grinding chamber, a wheel assembly mounted on the center shaft and at least one swing hammer mounted on the wheel assembly. The at least one swing hammer preferably includes a base portion having a first end having a mounting portion for attachment to a wheel assembly of a material treatment system, a second end, an inboard portion proximate the mounting and an outboard portion proximate the second end. The swing hammer also preferably includes a wear pad disposed on the base portion that preferably includes an interrupted surface to improve wear resistance of the swing hammer.
1. A swing hammer for a particulate size reduction system, comprising:
a) a base portion having:
i) a first end having a mounting portion for attachment to a wheel assembly of a particulate size reduction system;
ii) a second end;
iii) an inboard portion proximate the mounting; and
iv) an outboard portion proximate the second end; and
b) a wear pad disposed on the base portion, the wear pad substantially covering a face of the base portion, the wear pad extending from a point proximate the second end of the base portion toward the first end of the base portion to a location proximate the mount, wherein the wear pad includes an interrupted wear surface.
2. The swing hammer of claim 1 , wherein the interrupted surface is defined by a plurality of raised surfaces.
3. The swing hammer of claim 2 , wherein the raised surfaces include a first plurality of elongate raised surfaces oriented along a first direction, and a second plurality of elongate raised surfaces oriented along a second direction different from the first direction.
4. The swing hammer of claim 3 , wherein the first direction is oriented at an angle of about 90° with respect to the second direction.
5. The swing hammer of claim 2 , wherein at least some of the raised surfaces are transversely oriented with respect to the swing hammer.
6. The swing hammer of claim 5 , wherein the transversely-oriented raised surfaces are generally straight.
7. The swing hammer of claim 5 , wherein the transversely-oriented raised surfaces are generally chevron-shaped.
8. The swing hammer of claim 2 , wherein at least some of the raised surfaces are generally cylindrical in shape.
9. The swing hammer of claim 2 , wherein at least some of the raised surfaces are generally dome-shaped.
10. The swing hammer of claim 2 , wherein at least some of the raised surfaces are generally pyramid-shaped.
11. The swing hammer of claim 2 , wherein the raised surfaces are provided in different shapes.
12. A particulate size reduction system comprising:
a) a grinding chamber;
b) a center shaft defining an axis of rotation and configured for rotational motion within the grinding chamber;
c) a wheel assembly mounted on the center shaft; and
d) at least one swing hammer mounted on the wheel assembly, the at least one swing hammer including:
i) a base portion having:
(1) a first end having a mounting portion for attachment to a wheel assembly of a particulate size reduction system;
(2) a second end;
(3) an inboard portion proximate the mounting; and
(4) an outboard portion proximate the second end; and
ii) a wear pad disposed on the base portion, the wear pad substantially covering a face of the base portion, the wear pad extending from a point proximate the second end of the base portion toward the first end of the base portion to a location proximate the mount, wherein the wear pad includes an interrupted wear surface.
13. The particulate size reduction system of claim 12 , wherein the interrupted surface is defined by a plurality of raised surfaces.
14. The particulate size reduction system of claim 13 , wherein the raised surfaces include a first plurality of elongate raised surfaces oriented along a first direction, and a second plurality of elongate raised surfaces oriented along a second direction different from the first direction.
15. The particulate size reduction system of claim 13 , wherein at least some of the raised surfaces are transversely oriented with respect to the swing hammer.
16. The particulate size reduction system of claim 15 , wherein the transversely-oriented raised surfaces are generally straight.
17. The particulate size reduction system of claim 13 , wherein at least some of the raised surfaces are generally cylindrical in shape.
18. The particulate size reduction system of claim 13 , wherein at least some of the raised surfaces are generally dome-shaped.
19. The particulate size reduction system of claim 13 , wherein at least some of the raised surfaces are generally pyramid-shaped.
20. The particulate size reduction system of claim 13 , wherein the raised surfaces are provided in different shapes.