Device for controlled separation between two parts and use of such a device

Patent metadata

Field	Value
Publication number	US-10689134-B2
Application number	US-201615764645-A
Country	US
Kind code	B2
Filing date	Sep 19, 2016
Priority date	Sep 30, 2015
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

Disclosed is a device for controlled separation of a first so-called stationary part and a second so-called mobile part, the stationary part having a stationary connecting surface opposite a mobile connecting surface of the mobile part, the stationary part having a different thermal expansion coefficient from that of the mobile part, the separation device including: at least one connecting agent arranged in a layer between the stationary connecting surface and the mobile connecting surface, at least one device for heating at least one of the stationary part and the mobile part, and at least one system for controlling the heating device.

First claim

The invention claimed is:

1. A separation device for controlled separation of a first stationary part and a second mobile part, the stationary part having a thermal expansion coefficient different from that of the mobile part, the separation device comprising:
at least one bonding agent placed in a layer between a stationary connecting surface of the stationary part and an opposite mobile connecting surface of the mobile part,
at least one device for heating at least one of the stationary part and the mobile part, and
at least one control system of the heating device,
wherein the at least one bonding agent has a decomposition temperature greater than a heating temperature of the heating device.

2. The separation device according to claim 1 , in which the heating device is mounted on the stationary part, without contact with the mobile part.

3. The separation device according to claim 1 , in which the bonding agent has a glass transition temperature less than a heating temperature of the heating device.

4. The separation device according to claim 1 , in which the heating device comprises electric heating elements.

5. The separation device according to claim 1 , in which the bonding agent is an adhesive of the Hysol® EA9321 type.

6. The separation device according to claim 1 , in which the thermal expansion coefficient of the stationary part is greater than the thermal expansion coefficient of the mobile part.

7. The separation device according to claim 6 , in which the stationary part is produced from aluminium or one of its alloys, and the mobile part is produced by selecting one of the following materials: Invar, titanium, silicon carbide, carbon fibre-reinforced polymer (CFRP).

8. The separation device according to claim 7 , in which the stationary part is produced from aluminium and the mobile part is produced from Invar, the difference between the thermal expansion coefficient of the stationary part and the thermal expansion coefficient of the mobile part is of the order of 20.10 −6 ° C. −1 .

9. The separation device according to claim 1 , in which the separation of the stationary part and the mobile part is carried out in a period between 2 and 10 minutes.

10. The separation device according to claim 1 , in which the maximum temperature of the heating device is 200° C.

11. The separation device according to claim 1 , in which the control system comprises a wireless communication system for receiving a control signal.

12. The separation device according to claim 1 , in which the stationary part and the mobile part are cylindrical in shape.

13. The separation device according to claim 1 , in which the stationary part and the mobile part are not in direct contact.

14. Use of the separation device ( 6 ) according to claim 1 for space launchers, space probes, satellites, missiles.

15. The separation device according to claim 1 , wherein the stationary connecting surface of the stationary part is flat and the opposite mobile connecting surface of the mobile part is flat.

16. A separation device for controlled separation of a first stationary part and a second mobile part, the stationary part having a thermal expansion coefficient different from that of the mobile part, the separation device comprising:
at least one bonding agent placed in a layer between a stationary connecting surface of the stationary part and an opposite mobile connecting surface of the mobile part,
at least one device for heating at least one of the stationary part and the mobile part, and
at least one control system of the heating device,
wherein the separation of the stationary part and the mobile part is carried out in a period between 2 and 10 minutes.

17. The separation device according to claim 16 , in which the heating device is mounted on the stationary part, without contact with the mobile part.

18. The separation device according to claim 16 , in which the bonding agent has a glass transition temperature less than a heating temperature of the heating device.

19. The separation device according to claim 16 , in which the heating device comprises electric heating elements.

20. The separation device according to claim 16 , in which the bonding agent is an adhesive of the Hysol® EA9321 type.

21. The separation device according to claim 16 , in which the thermal expansion coefficient of the stationary part is greater than the thermal expansion coefficient of the mobile part.

22. The separation device according to claim 21 , in which the stationary part is produced from aluminium or one of its alloys, and the mobile part is produced by selecting one of the following materials: Invar, titanium, silicon carbide, carbon fibre-reinforced polymer (CFRP).

23. The separation device according to claim 22 , in which the stationary part is produced from aluminium and the mobile part is produced from Invar, the difference between the thermal expansion coefficient of the stationary part and the thermal expansion coefficient of the mobile part is of the order of 20.10 −6 ° C. 1 .

24. The separation device according to claim 16 , in which the maximum temperature of the heating device is 200° C.

25. The separation device according to claim 16 , in which the control system comprises a wireless communication system for receiving a control signal.

26. The separation device according to claim 16 , in which the stationary part and the mobile part are cylindrical in shape.

27. The separation device according to claim 16 , in which the stationary part and the mobile part are not in direct contact.

28. Use of the separation device ( 6 ) according to claim 16 for space launchers, space probes, satellites, missiles.

29. The separation device according to claim 16 , wherein the stationary connecting surface of the stationary part is flat and the opposite mobile connecting surface of the mobile part is flat.

Assignees

• Airbus Defence & Space Sas

Inventors

• Oldham Robert
• Mayo Philippe
• Levallois Franck
• Figus Christophe
• Logut Daniel

Classifications

• F42B15/36 Primary

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• B64G1/6457

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• B64G1/2228

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• B64G1/6455

  Pyrotechnics; Using heat · CPC title

• B64G1/2224

  about multiple axes · CPC title