Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Internally ventilated brake disk rotor

A brake disc and rotor technology, applied in the direction of brake disc, brake type, brake components, etc., can solve the problems of uneven heat transfer, uneven temperature, etc.

Active Publication Date: 2013-10-09
BREMBO SGL CARBON CERAMIC BRAKES GMBH
View PDF10 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to non-uniform heat transfer and, subsequently, to non-uniformity in temperature, which causes warping of the brake disc rotor due to differences in thermal expansion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Internally ventilated brake disk rotor
  • Internally ventilated brake disk rotor
  • Internally ventilated brake disk rotor

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] Experiments have been carried out to figure 1 A distinction is made between the represented design according to the invention and that described in the co-pending patent application EP10160307.4, in order to show, independently of the direction of rotation, the design according to the invention compared to the state of the art Improvement of the performance of the rotor ring. In both cases the material of the ventilated brake discs is the same carbon fiber reinforced silicon carbide ceramic material with a cooling channel height of 20mm, an overall thickness of 40mm, an outer diameter of 400mm and an inner diameter of 200mm. Both designs are optimized for a good uniformity of heat transfer on the surface of the brake disc rotor, which results in a uniform temperature distribution over the friction surface area of ​​the brake disc, thereby also reducing heat transfer within the brake disc caused tension.

[0037] with the according to EP10160307.4 figure 1 The cooling...

example 2

[0042] In a further experiment, the heat transfer from the heated brake disc to the cooling air was evaluated in different directions of rotation. Using the same brake disc at the same initial temperature of 500° C. as in Example 1, the heat transfer was evaluated in terms of the temperature of the cooling air before and after passing through the cooling tubes and the mass flux of the cooling air.

[0043] The following data is obtained (direction of rotation: ccw=counterclockwise, cw=clockwise):

[0044]

[0045] As can be seen, operation of the brake disc rotor "comp." ("comparative example") in the wrong direction reduces significantly the heat transfer that can be achieved by rotating the disc in the correct direction of rotation by 22 % heat transfer efficiency. Brake discs according to the invention "Inv." ("Invention") have a slightly increased (+4%) heat transfer efficiency compared to rotating the disc rotor "comp." in a predetermined direction. Since the results...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Outer diameteraaaaaaaaaa
Login to View More

Abstract

Internally vented brake disk rotors (1) having the form of a cylindrical slab having annular geometry and having an axis of circular symmetry for its outer circumference and its inner circumference, with a centre hole which is symmetric with regard to the said axis, comprising at least two parallel ring disks (2) which are connected with each other by a repeating series of ribs, the design of which brake disk rotor is symmetric with regard to different sense of rotation of the said brake disk (1), i. e. symmetric to at least one plane spanned by the axis of rotation of the brake disk and one radius of the cylindrical brake disk.

Description

technical field [0001] The invention relates to an internally ventilated brake disc rotor in the form of a cylindrical plate of annular geometry and having a circular axis of symmetry for its outer circumference and its inner circumference, said internally ventilated brake disc rotor The disc rotor has a central bore symmetrical about said axis, said internally ventilated brake disc rotor comprising at least two discs arranged parallel to each other, said at least two discs being interconnected by a series of repeating ribs. Background technique [0002] Internally ventilated brake discs are known, for example, from DE 2 257 176 A1 and from US Patent 7,100,748 B2. US Patent 7,100,748 B2 has two annular discs or friction rings connected to each other by webs or ribs, between which tubes are formed, which tubes guide cooling air. The rib extends in a curved manner between its end regions, said end region at the periphery being radially aligned with the brake disc and at an an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F16D65/12
CPCF16D2065/1328F16D65/128F16D65/12
Inventor 安德烈亚斯·皮皮利斯克里斯蒂安·维特克亚历山大·克林格尔赫弗彦尼克·威尔莱敏
Owner BREMBO SGL CARBON CERAMIC BRAKES GMBH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com