Hydrodynamic bearing

By introducing a combination of an offset decoupling diaphragm and a stop element into the hydraulic damping bearing, the problem of increased dynamic stiffness under high-frequency small vibrations is solved, enabling compensation for volume changes under small vibration amplitudes, extending service life and maintaining good acoustic characteristics.

CN117231671BActive Publication Date: 2026-07-03VIBRACOUSTIC SE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
VIBRACOUSTIC SE
Filing Date
2023-06-14
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing hydraulic damping bearings exhibit increased dynamic stiffness under high-frequency, low-amplitude vibrations, leading to poor acoustic characteristics. Furthermore, the path of the decoupling diaphragm cannot be effectively limited, affecting service life and damping effect.

Method used

An offset decoupling membrane is introduced into the hydraulic damping bearing. The decoupling membrane, which is fixed to the outer periphery, is formed in accordance with the elastomer and fixed by a support. Combined with a stop element to limit the offset, it ensures that the volume change is compensated under small vibration amplitude and avoids hydraulic fluid loss.

Benefits of technology

It effectively reduces the overall stiffness of the bearing, extends its service life, maintains good acoustic characteristics, and keeps the hydraulic fluid closed under large vibration amplitude, thus improving the damping effect.

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Abstract

The present invention relates to a hydraulically damped bearing (10) having an outer sleeve (12) surrounding an internal space, a bearing core (14), at least one elastomer (16) located between the outer sleeve (12) and the bearing core (14), and at least one separation membrane (18, 20) dividing the internal space into at least two chambers (22, 24) filled with hydraulic fluid, and having at least one channel fluidly connecting the at least two chambers filled with hydraulic fluid. In addition to the at least one separation membrane (18, 20), the elastomer (16) further includes at least one repositionable decoupling membrane (26) formed in accordance with the elastomer material located between the chambers (22, 24), wherein the peripheral connection (58) of the decoupling membrane (26) is fixed relative to the outer sleeve (12). Therefore, the present invention provides a further improved hydraulically damped bearing (10) that can be easily manufactured and is therefore cost-effective.
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