Hydraulic vibration damper with noise reducing valve structure

Details Hydraulic vibration damper with noise reducing valve structure Hydraulic vibration damper with noise reducing valve structure

1997-02-07

1998-05-26

Dang, Khanh

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181233, 188282, F16K 4702, F16F 9348

Patent

active

057553050

ABSTRACT:
A hydraulic vibration damper includes a noise-reducing valve structure that isolates the region of cavitation away from the metal structures forming the pressure cylinder, the piston and valve structures. The improved design includes a sharper rebound land edge angle forming a boundary near the valve exit, enlarging the region of working fluid adjacent the valve structure exit within which implosions can take place. This design also dispenses with the use of a skirt around the perimeter of the piston, and removes contact between the piston and the pressure cylinder. A support piston provides contact with the interior surface of the pressure cylinder. These features distance the region of cavitation from metal surfaces of the piston and valve structures, thereby significantly reducing the transmission throughout the vibration damper of noise and vibration caused by implosions within the working fluid.

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