Power plants – Pressure fluid source and motor – Having means controlling or attenuating shock vibration,...
Patent
1994-12-21
1996-10-01
Ryznic, John E.
Power plants
Pressure fluid source and motor
Having means controlling or attenuating shock vibration,...
60494, F16D 3102
Patent
active
055602053
ABSTRACT:
In many hydraulic systems, fluid borne noise is generated during operation due to the effects of the hydraulic pump. This fluid borne noise is many times transmitted to the hydraulic valves, hydraulic lines, and other structures that valves and lines are mounted on. The structure then emits vibrations that create the largest portion of the system air borne noise. In the subject invention, an apparatus is provided for the attenuation of fluid borne noise in a hydraulic system. The apparatus includes a fluid vessel having a volumetric space of a predetermined size located in the system generally adjacent a pump and a flow restrictor located in the system downstream of the fluid vessel. In the subject arrangement, the flow restrictor may be adjustable in response to various system parameters so that the fluid borne noise is effectively controlled over wide ranges of system pressures, pump drive speeds, and pump displacements. By reducing the fluid borne noise in the hydraulic system, the associated air borne noise that is created by various components that are associated with the hydraulic system is further attenuated.
REFERENCES:
patent: 3606243 (1971-09-01), Ichiryu et al.
patent: 3660979 (1972-05-01), Kamakura et al.
patent: 3956969 (1976-05-01), Hein
patent: 4063824 (1977-12-01), Baker et al.
patent: 4103489 (1978-08-01), Fletcher et al.
patent: 4132506 (1979-01-01), Dantlgraber
patent: 4292805 (1981-10-01), Acheson
patent: 4801245 (1989-01-01), de Haas et al.
patent: 4979441 (1990-12-01), Welch et al.
patent: 5085051 (1992-02-01), Hirata
patent: 5168703 (1992-12-01), Tobias
patent: 5193885 (1993-03-01), Yamaguchi et al.
patent: 5199856 (1993-04-01), Epstein et al.
patent: 5355676 (1994-10-01), Inokuchi
patent: 5475976 (1995-12-01), Phillips
Diesel Progress Engines & Drives, "The dB(A)s of Hydraulic System Noise", R. Henke, Jul. 1994, pp. 42-26.
SAE paper No. 801006, "A Ripple-Free Gear Pump Using Controlled Leakage", Headrick & King, 1980, Fluid Power Research Center.
Burrows J. W.
Caterpillar Inc.
Ryznic John E.
LandOfFree
Attenuation of fluid borne noise does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Attenuation of fluid borne noise, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Attenuation of fluid borne noise will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1495524