Hydraulic accumulator and method of manufacture

F - Mech Eng,Light,Heat,Weapons – 15 – B

Patent

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F15B 1/10 (2006.01)

Patent

CA 2747071

An accumulator for a hydraulic system includes a polymer liner defining a cavity. A metal bellows assembly is housed in the cavity and separates the cavity into a first chamber and a second chamber, with the first and second chambers isolat-ed from one another by the bellows assembly. A composite shell substantially encases the liner. The liner and shell are configured so that the first chamber receives hydraulic fluid from and delivers hydraulic fluid through an opening in the liner and the shell as the bellows assembly expands and compresses due to pressurized gas in the second chamber balancing fluid pressure changes in the first chamber. In one embodiment, the metal bellows assembly includes hydro formed bellows.

L'invention porte sur un accumulateur pour un système hydraulique, qui comprend une doublure polymère définissant une cavité. Un ensemble de soufflet métallique est logé dans la cavité et sépare la cavité en une première chambre et une seconde chambre, les première et seconde chambres étant isolées l'une de l'autre par l'ensemble de soufflet. Une coque composite enveloppe sensiblement la doublure. La doublure et la coque sont configurées de telle sorte que la première chambre reçoit un fluide hydraulique et délivre un fluide hydraulique à travers une ouverture dans la doublure et dans la coque lorsque l'ensemble de soufflet se dilate et se comprime du fait que les gaz sous pression dans la seconde chambre équilibrent les changements de pression de fluide dans la première chambre. Dans un mode de réalisation, l'ensemble de soufflet métallique comprend un soufflet hydraulique.

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