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Manufacture Of Resin Based Composite Heat Insulators Through Powder Metallurgy Route For Use In Aircraft Brake Systems
Abstract: The Aircraft brake functions by virtue of the conversion of the kinetic energy of the moving aircraft to heat energy and the absorption and subsequent dissipation of the same by the heat sink (Heat pack) Aircraft brake unit consists of heat pack assembly where friction brake discs are assembled, which are operated by applying the hydraulic pressure through piston cylinder assembly (Fig-1). The Heat generation arises from the rubbing of the surfaces of the brake discs by means of hydraulic pressure applied through Piston during the braking application. The generated heat due to rise in temperature during braking should not transfer to piston Cylinder assembly of the brake unit to avoid the failure of the cylinder assembly due to high temperature. To avoid the heat transfer in important to introduce a Heat insulator (Fig-2) component on the piston assembly, which acts as barrier for heat transfer from Heat pack to brake unit to safeguard the brake unit. These heat insulators should act as insulation for heat and also should be capable of taking compressive loads generated during braking application. No single material will have the above mentioned properties. No conventional process can manufacture a component with the above mentioned properties. Powder metallurgy route is the only economical processing route to manufacture heat insulators. Here, in this Invention the Resin powder based composite heat insulator was manufactured to meet the desired Heat insulation properties at elevated temperatures & also to withstand the high compressive loads during braking application.
Notices, Deadlines & Correspondence
Patent Information
Applicants
HINDUSTAN AERONAUTICS LTD.
Inventors
1. YAJNAPAL
2. SKR CHAKRAVARTHY
Specification
1) Title of the invention
Manufacture of Resin Based Composite Heat Insulators through Powder Metallurgy route for use in Aircraft Brake Systems.
2) Field of invention
The present invention is a Resin powder based composite material manufactured through Powder Metallurgy route.
3) Use of invention
The part manufactured with this composite is used as a Insulator in aircraft brake system to prevent heat transfer from brake heat pack to the brake unit & prevents the damage of brake unit.
4) Prior art
Not applicable as the newly developed Resin Based Insulator is new in invention & meets the requirement.
5) Draw backs of prior art
Not applicable.
6) Compari
son between prior art and present invention
Not applicable.
7) Aim of the invention
Aim of the invention is to develop a new Resin powder Based Composite Heat insulator component to be used in the brake assembly of the aircraft on the piston assembly to prevent heat transfer from Brake heat pack assembly to brake unit due to Instantaneous Heat generated on very high temperature rise of the Brake heat pack during braking application.
8) Summary of the present invention The present invention is the manufacture of resin based composite Heat insulator to use in the piston & cylinder assembly of the aircraft brake unit. The manufactured heat Insulator finds application in aircraft brake systems to prevent heat transfer from Brake heat pack to Cylinder piston assembly. For the said application, the Heat Insulator needs to have excellent heat resistant properties, density, hardness and should be able to bear the hydraulic compression loads which are applied to the brake heat pack through piston & cylinder assembly during braking application.
These properties are achieved in the present invention by manufacturing Resin powder based composite heat Insulator through powder metallurgy route.
9) Brief description of drawings
Not applicable
10) Statement of invention
Manufacture of Resin powder based composite Heat Insulators through powder metallurgy route for use in Aircraft Brake systems, which needs to prevent the heat transfer from brake heat pack to the brake cylinders. High amount of heat will be generated in the brake heat pack due to Instantaneous temperature rises to as high as 1000°C during braking application.
11) Detailed description of invention
The heat Insulators are designed for the particular aircraft based on the maximum temperature rise of the brake unit varies from 200 -1500 ° C & also to with stand the compression load of 2000 kg to 15000 kgf generated due to application of the brake pressure. No single engineering product will meet the diverse temperature range & compressive strength requirement.
. The present invention is best suited for Heat Insulating pad on the piston of the brake unit of an aircraft whose brake compressive force is about 9000 kgf & temperature rise is about 800°C during braking. The primary function of the heat Insulator is to prevent the heat transfer from brake heat pack to the hydraulic cylinders.
Manufacturing process of Resin powder based Heat Insulators:
The above manufactured Heat Insulators are needs to perform the function of the Insulating heat from brake heat pack to Cylinder assembly of the brake unit. To perform this function the selected heat insulator part should have the following the properties.
TITLE: Manufacture of Resin Based Composite Heat Insulators through Powder Metallurgy route for use in Aircraft Brake Systems.
Claims "We claim"
1 Resin powder based heat Insulator composite is a new Insulating material composite for aircraft brake application , the details of which is hitherto not available in open literature.
2 The formulation of the composite has been developed by Foundry and Forge Division of HAL, Bangalore and the parameters are optimized for aircraft braking system which is having compressive load of 9000kgf & temperature rise of the brake heat pack during braking is 800°C
3 The material composition was optimized with Resin powder, Brass powder, Barium Sulphate, Asbestos fiber, Glass fiber.
4 The Heat Insulator made of this composition is tested on aircraft for checking of the performance. The results of these tests were satisfactory& Repeatable.
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 6110-CHE-2015-FER.pdf | 2021-10-17 |
| 1 | 6110-CHE-2015-Form 5-131115.pdf | 2015-11-24 |
| 2 | 6110-CHE-2015-Form 3-131115.pdf | 2015-11-24 |
| 2 | Form18_Normal Request_21-08-2019.pdf | 2019-08-21 |
| 3 | 6110-CHE-2015-Form 1-131115.pdf | 2015-11-24 |
| 3 | 6110-CHE-2015-Form 2(Title Page)-131115.pdf | 2015-11-24 |
| 4 | 6110-CHE-2015-Form 1-131115.pdf | 2015-11-24 |
| 4 | 6110-CHE-2015-Form 2(Title Page)-131115.pdf | 2015-11-24 |
| 5 | 6110-CHE-2015-Form 3-131115.pdf | 2015-11-24 |
| 5 | Form18_Normal Request_21-08-2019.pdf | 2019-08-21 |
| 6 | 6110-CHE-2015-FER.pdf | 2021-10-17 |
| 6 | 6110-CHE-2015-Form 5-131115.pdf | 2015-11-24 |
Search Strategy
| 1 | 6110-che-2015-searchstrategyE_23-04-2021.pdf |