Claims
- 1. A disc mill assembly for a pulverizing system, including:
a housing; a flywheel received in the housing and adapted for being secured to an associated rotating spindle; a water jacket; first and second disc blades disposed in facing operative relation, each disc blade having a cutting surface, wherein the first disc blade is disposed adjacent the flywheel and the second disc blade is disposed adjacent the water jacket so the cutting surfaces are facing; and first and second ring clamps, the first ring clamp at least partially securing the first disc blade to the flywheel and the second ring clamp at least partially securing the second disc blade to the water jacket.
- 2. The disc mill assembly as set forth in claim 1, further including:
a center hub clamp at least partially securing the first disc blade to the flywheel.
- 3. The disc mill assembly as set forth in claim 1, further including:
a third ring clamp at least partially securing the second disc blade to the water jacket.
- 4. The disc mill assembly as set forth in claim 1, further including:
an air inlet secured to the housing and disposed to direct air from an external air supply toward material being ground by the first and second disc blades in response to a vacuum created in the disc mill assembly by a blower associated with the pulverizing system.
- 5. The disc mill assembly as set forth in claim 4, wherein the air inlet is an adjustable air inlet, the adjustable air inlet including:
a damper to adjust the amount of air flowing through the air inlet.
- 6. The disc mill assembly as set forth in claim 4, wherein the air directed by the air inlet forms an input air stream that is at least partially tangential to outer walls of the first and second disc blades.
- 7. The disc mill assembly as set forth in claim 4, wherein the external air supply is at least partially supplied from at least one of a group including: i) a device producing chilled air, ii) ambient air from outside a building associated with the pulverizing system, and iii) ambient air within the building and in a vicinity of the pulverizing system.
- 8. The disc mill assembly as set forth in claim 1, wherein:
the flywheel includes a plurality of elongated protrusions extending from the flywheel toward the first disc blade; and the first disc blade includes a plurality of elongated cavities for receiving the elongated protrusions when the first disc blade is secured to the flywheel; wherein undesired rotational movement of the first disc blade is resisted when the elongated protrusions are received in the elongated cavities.
- 9. The disc mill assembly as set forth in claim 1, wherein:
the water jacket includes a plurality of elongated protrusions extending from the water jacket toward the second disc blade; and the second disc blade includes a plurality of elongated cavities for receiving the elongated protrusions when the second disc blade is secured to the water jacket; wherein rotational movement of the second disc blade is resisted when the elongated protrusions are received in the elongated cavities.
- 10. The disc mill assembly as set forth in claim 1, wherein the water jacket is secured to a lid associated with the housing by a plurality of blade height adjustment mechanisms to adjust the second disc blade to a desired spaced apart relation from the first disc blade.
- 11. The disc mill assembly as set forth in claim 10, each blade height adjustment mechanism including:
an adjustable elongated spacing member having a central aperture along its axial length to adjust the water jacket to a desired spaced apart relation from the lid; and an adjustable elongated securing member extending through the central aperture of the spacing member to secure the water jacket to the lid.
- 12. The disc mill assembly as set forth in claim 11, wherein the spacing member includes:
a bolt having a central aperture along its axial length.
- 13. The disc mill assembly as set forth in claim 11, wherein the securing member includes:
a threaded rod having a first end secured to the water jacket and a second end extending through the aperture of the spacing member; and a nut mating with the second end of the threaded rod extending through the aperture of the spacing member and thereby securing the water jacket to the lid.
- 14. The disc mill assembly as set forth in claim 1, the water jacket including:
a first portion having an exterior side facing the second disc blade, an interior side opposite the exterior side, an outer wall extending from the exterior side to the interior side along an outer periphery of each side, and an inner wall extending from the exterior side to the interior side forming an aperture through a central area of the first portion, a surface of the interior side including:
an outer groove nearest to the outer wall; a central groove forming a cavity for receiving coolant; and an inner groove nearest the inner wall; an outer O-ring received in the outer groove of the first portion; an inner O-ring received in the inner groove of the first portion; and a second portion secured to the first portion, the second portion having an exterior side facing away from the second disc blade, an interior side opposite the exterior side and adapted to mate with the interior side of the first portion, an outer wall extending from the exterior side to the interior side along an outer periphery of each side, and an inner wall extending from the exterior side to the interior side forming an aperture through a central area of the second portion.
- 15. The disc mill assembly as set forth in claim 1, wherein each disc blade assembly has a thickness perpendicular to the generally planar surface and the cutting surface with no openings through the thickness other than an aperture through a central portion.
- 16. A disc blade for a disc mill assembly of a pulverizing system, including:
an annular member formed by a generally planar first surface, a cutting surface opposite the first surface, an outer wall extending from the first surface to the cutting surface, and an inner wall extending from the first surface to the cutting surface, wherein the member has a thickness perpendicular to the first surface and cutting surface, an aperture through the central portion being the only opening through the thickness.
- 17. The disc blade as set forth in claim 16, wherein the thickness is less than ⅝ inch (1.58 cm).
- 18. The disc blade as set forth in claim 16, wherein the thickness is less than ½ inch (1.27 cm).
- 19. The disc blade as set forth in claim 16, wherein the thickness is less than {fraction (25/64)} inch (0.99 cm).
- 20. The disc blade as set forth in claim 16, wherein the first surface includes a plurality of elongated cavities adapted to receive a corresponding plurality of elongated protrusions projecting from a component adjacent to the first surface toward the disc blade, wherein undesired rotational movement of the disc blade is resisted when the protrusions are received in the cavities.
- 21. The disc blade as set forth in claim 16, wherein the disc blade is constructed from material including about 11-27% Chromium.
- 22. A method for controlling a temperature of material in a disc mill assembly having first and second disc blades, the method including the steps:
a) directing an adjustable input air stream toward the first and second disc blades; b) rotating at least the first disc blade; c) directing material to be ground toward the first and second disc blades; d) grinding material between the first and second disc blades into smaller particles; e) monitoring the temperature of the material in the disc mill assembly; and f) controlling at least one of the air stream directing step and the material directing step in response to the temperature monitoring step to maintain a temperature of the material within a predetermined threshold of a desired temperature.
- 23. The method as set forth in claim 22, wherein the adjustable air inlet includes a damper, the step f) further including:
f) adjusting the damper to minimize the temperature of the material.
- 24. The method as set forth in claim 22, wherein the input air stream directed toward the first and second disc blades is at least partially tangential to outer walls of the first and second disc blades.
- 25. The method as set forth in claim 22, wherein the external air supply is at least partially supplied from at least one of a group including: i) a device producing chilled air, ii) ambient air from outside a building associated with the disc mill assembly, and iii) ambient air within the building and in a vicinity of the disc mill assembly.
Parent Case Info
[0001] This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60/445,623, filed on Feb. 7, 2003, the disclosure of which is incorporated herein by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60445623 |
Feb 2003 |
US |