Hydraulic vibration-damping support

摘要

Controllable hydraulic vibration-damping support comprising a main hydraulic circuit comprising a working chamber, a compensation chamber, and a first constricted passageway, and an auxiliary hydraulic chamber separated from the working chamber by a decoupling valve and communicating with the main hydraulic circuit by means of a second constricted passageway having a resonance frequency of less than 5 Hz. The auxiliary chamber is separated from a pneumatic chamber by a movable wall, and a control device is provided for selectively either connecting the pneumatic chamber to the open air, or bleeding air from the pneumatic chamber.

主权项

1. A controllable hydraulic vibration-damping support intended to be interposed for damping purposes between first and second rigid elements, said vibration-damping support comprising:
first and second strength members adapted to be secured to the first and second rigid elements an elastomer body which connects the first and second strength members and which delimits, at least in part, a working chamber, a deformable compensation chamber which communicates with the working chamber via a first constricted passageway, the compensation chamber, working chamber, and first constricted passageway forming a hydraulic volume filled with liquid, the first constricted passageway having a resonance frequency of between 5 and 20 Hz, an auxiliary chamber, a decoupling valve comprising: an elastomeric isolating diaphragm, a first stop gate and a second stop gate,
wherein the elastomeric isolating diaphragm separates the working chamber and the auxiliary chamber, andthe first and second stop gates respectively communicate with the working chamber and with the auxiliary chamber, the isolating diaphragm being arranged between the first and second stop gates and distanced from each stop gate to allow it to travel freely between said first and second stop gates a control device adapted for selectively locking the isolating diaphragm, wherein the auxiliary chamber is filled with liquid and communicates with said hydraulic volume via a second constricted passageway having a resonance frequency of less than 5 Hz, wherein it further comprises a pneumatic control chamber separated from the auxiliary chamber by a movable wall, and wherein the control device is adapted for selectively connecting or disconnecting said pneumatic control chamber to the open air.