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Liquid-cooled disc brakes

A liquid cooling, brake disc technology, applied in the direction of brake type, brake components, brake disc, etc., can solve problems such as coolant loss

Inactive Publication Date: 2009-04-01
QINETIQ LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, an excessively rapid rate of heat transfer through the pan to the coolant can cause a large portion of the liquid in the pan to boil, resulting in excessive pressurization of the system and possible loss of coolant

Method used

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  • Liquid-cooled disc brakes
  • Liquid-cooled disc brakes
  • Liquid-cooled disc brakes

Examples

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Embodiment Construction

[0020] refer to figure 1 , figure 1 Illustrating one form of drive arrangement, a brake arrangement and disc such as the present invention may be found particularly useful for a track drive of a skid-turn vehicle as described in WO-02 / 083483 or WO-2006 / 021745 device. It will be appreciated, however, that the invention has more general application to the braking of axles, propshafts, wheels or the like in any environment requiring internal liquid cooling.

[0021] figure 1 In it, a transverse drive device consists of two electric propulsion motors 1a and 1b, whose shift lever units 2a and 2b are connected, which rotate drive shafts 3a and 3b. On the outside of these units, the transmission includes in each case the brakes 4a, 4b and the final drive gear reduction 5a, 5b, all of which are housed within the body, resulting in the respective track drive sprockets 6a and 6b on the opposite side of the vehicle . Inboard drive shafts 3a and 3b are connected to a controlled diffe...

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PUM

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Abstract

A liquid-cooled brake disc comprises a central stationary aluminium cooling plate (14) with an internal chamber (17) for the circulation of water or other liquid coolant, and a series of cast iron sectors (20) mounted on opposite sides of the plate for contact by conventional brake friction material carried by discs on a shaft to be braked (not shown). The cooling plate (14) and sectors (20) are separated by thin air gaps (22) or other thermally insulative layers. In use the sectors (20) have sufficient thermal capacity to store the heat generated by a braking event over a relatively short period, and this heat is then transferred to the coolant over a relatively longer period at a rate determined by the conductance of the air gaps. In particular this form of construction can absorb and dissipate the heat of braking without bulk boiling of the coolant.

Description

【Field of Invention】 [0001] This invention relates to disc brakes and in particular to dry friction, internally liquid cooled disc brakes and a novel construction of such liquid cooled discs. Brakes comprising discs according to the invention can be used to brake axles, crankshafts, wheels or the like in various vehicle applications or other machinery including calipers, and are particularly suitable for heavy vehicles such as armored military vehicles or large trucks. As described in WO-02 / 083483 or WO-2006 / 021745, one application involves a brake in a drive configuration for a combat tank, bulldozer or other skid steer vehicle. 【Background technique】 [0002] The most common vehicle braking system uses dry friction, external air cooled disc brakes. Such brakes rely on having a disc large enough to absorb the energy necessary to satisfy the braking duty cycle with an acceptable temperature rise, and having sufficient surface area to move the The heat generated by braking ...

Claims

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Application Information

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IPC IPC(8): F16D65/12F16D65/853
CPCF16D65/853F16D2065/784F16D2065/1312F16D2065/1328F16D2065/1324F16D2065/1364F16D65/128F16D65/12
Inventor R·W·汤普森
Owner QINETIQ LTD