Internally vented brake disk with improved heat dissipation
View Patent ↗A vented brake disk has improved heat dissipation by cooling channels that extend from an inner circumference to an outer circumference and the channel walls of which are formed with flow obstructions in the form of a female thread.
1. A vented brake disk with heat dissipation, comprising:
a substantially circular, annular brake disk body formed with an inner circumferential surface and an outer circumferential surface;
at least one cooling channel formed inside said brake disk body and having a length extending from said inner circumferential surface to said outer circumferential surface, said cooling channel having an opening formed at said outer circumferential surface, said cooling channel having a cross sectional area increasing incrementally over only a portion of said length of said cooling channel in a direction from said inner circumferential surface to said outer circumferential surface, the incremental increase of said cross sectional area being defined by overlapping bores directed at different angles with respect to one another, said bores overlapping up to said opening; and
a multiplicity of substantially evenly distributed flow obstructions formed on a channel wall bounding said at least one cooling channel, said flow obstructions being defined by a helical thread formed in said cooling channel.
2. The brake disk according to claim 1 , wherein said flow obstructions are crests and troughs formed in said channel wall of said cooling channel.
3. The brake disk according to claim 2 , wherein said troughs are defined by a uniform diameter, at least within a given section of said cooling channel, and said crests have an increasing height relative to said troughs in said given section of said cooling channel.
4. The brake disk according to claim 1 , wherein said at least one cooling channel is one of a plurality of cooling channels extending substantially radially from said inner circumferential surface to said outer circumferential surface.
5. The brake disk according to claim 1 , wherein said at least one cooling channel is one of a plurality of cooling channels extending substantially linearly from said inner circumferential surface to said outer circumferential surface and enclosing an angle of between 1° and 55° with a radial direction.
6. The brake disk according to claim 1 , wherein the cooling channel is a bore drilled into said disk brake body and said flow obstructions are a female thread subsequently machined into said bore.
7. The brake disk according to claim 1 , wherein said brake disk body is formed of a ceramic material.
8. The brake disk according to claim 7 , wherein said brake disk body is formed of a material selected from the group consisting of a carbon fiber reinforced carbon composite and carbon fiber reinforced silicon carbide.
9. The brake disk according to claim 1 , wherein said brake disk body is formed of two mirror-symmetric, mating half disks.
10. The brake disk according to claim 1 , wherein said brake disk body is an integrally molded mass and said cooling channel is formed therein by lost core molding.
11. The brake disk according to claim 10 , wherein said cooling channel is curved from said inner circumferential surface to said outer circumferential surface.
12. A vented brake disk with heat dissipation, comprising:
a substantially circular, annular brake disk body formed with an inner circumferential surface and an outer circumferential surface;
at least one opening formed in said inner circumferential surface, a plurality of cooling channels each beginning at said opening and extending from said opening to said outer circumferential surface;
each of said plurality of cooling channels having a respective cross sectional area, said cross sectional area increasing incrementally over a portion of a length thereof in a direction from said inner circumferential surface to said outer circumferential surface, the incremental increase of each said respective cross sectional area being defined by overlapping bores directed at different angles with respect to one another, said bores overlapping up to said outer circumferential surface; and
a multiplicity of substantially evenly distributed flow obstructions formed on channel walls, said walls each bounding a respective one of sai plurality of cooling channels, said flow obstructions being defined by a helical thread formed in said plurality of cooling channels.