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. The wear pad preferably substantially covers a face of the base portion. The wear pad preferably extends 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.
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 portion; 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 substantially covers the inboard portion of the base portion.
2. The swing hammer of claim 1 , wherein the wear pad is bonded to the base portion from a material selected from the group consisting of (i) brazing, (ii) soldering, (iii) welding and combinations thereof.
3. The swing hammer of claim 1 , wherein the wear pad and base portion are forged from a single piece of material.
4. The swing hammer of claim 1 , wherein the base portion is made from steel.
5. The swing hammer of claim 1 , wherein the wear pad is made from an abrasion resistant cast iron.
6. 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 portion; 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 substantially covers the inboard portion of the base portion.
7. The particulate size reduction system of claim 6 , wherein the wear pad is bonded to the base portion from a material selected from the group consisting of (i) brazing, (ii) soldering, (iii) welding and combinations thereof.
8. The particulate size reduction system of claim 6 , wherein the wear pad and base portion are forged from a single piece of material.
9. The particulate size reduction system of claim 6 , wherein the base portion is made from steel.
10. The particulate size reduction system of claim 6 , wherein the wear pad is made from an abrasion resistant cast iron.
11. The swing hammer of claim 1 , wherein the wear pad is bonded to the base portion by a solder material including silver.
12. The swing hammer of claim 1 , wherein the base portion is a ductile forging and the wear pad is a casting.
13. The swing hammer of claim 1 , wherein the wear pad has a Brinell hardness of about 700 to about 750.
14. The swing hammer of claim 1 , wherein the base portion has a Brinell hardness of about 200 to about 255.
15. The particulate size reduction system of claim 6 , wherein the swing hammer is attached to the wheel assembly by way of a hammer pin.
16. The particulate size reduction system of claim 6 , wherein the system is adapted and configured to pulverize coal.
17. The particulate size reduction system of claim 6 , wherein the wear pad of the hammer is bonded to the base portion of the hammer by a solder material including silver.
18. The particulate size reduction system of claim 6 , wherein the base portion of the hammer is a ductile forging and the wear pad of the hammer is a casting.
19. The particulate size reduction system of claim 6 , wherein the wear pad of the hammer has a Brinell hardness of about 700 to about 750.
20. The particulate size reduction system of claim 6 , wherein the base portion of the hammer has a Brinell hardness of about 200 to about 255.