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Internally ventilated brake disc rotors

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

Active Publication Date: 2016-08-17
BREMBO SGL CARBON CERAMIC BRAKES GMBH
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  • 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

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  • Internally ventilated brake disc rotors
  • Internally ventilated brake disc rotors
  • Internally ventilated brake disc rotors

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, the 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 res...

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Abstract

The internally ventilated brake disc rotor (1) has the form of a cylindrical plate with a ring geometry, and the internally ventilated brake disc rotor has a circular axis of symmetry for its outer circumference and its inner circumference, said internally ventilated A moving disc rotor with a central hole symmetrical about said axis, said internally ventilated brake disc rotor comprising at least two parallel annular discs (2) interconnected by a series of repeating ribs , the design of the brake disc rotor is symmetrical with respect to the different directions of rotation of the brake disc (1), ie with respect to at least one The plane is symmetrical.

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

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D65/12
CPCF16D65/128F16D2065/1328F16D65/12
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