Active Hydraulic Mount Layout for Compact Sealing and Vibration Damping
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Solution Overview
Problem
Existing active hydraulic anti-vibration devices are cumbersome and difficult to seal due to the need for additional seals and space constraints, making them less suitable for installation in limited spaces between engine and body of motor vehicles.
Innovation Solution
A compact active hydraulic anti-vibration device design featuring an elastomer body, an elastomeric membrane, and a voice coil actuator with a magnetic element, where the electrical conductors are routed through a central part to minimize space and enhance sealing, and fluid communication between chambers is maintained through ducts filled with fluid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If an active hydraulic anti-vibration device is installed in the same space as a conventional hydraulic anti-vibration device, then the space requirement is satisfied, but the device becomes particularly cumbersome due to additional elements (actuator, piston, power supply)
Solution Approach 1:
The actuator is integrated within the housing of the anti-vibration device, and the piston moves within the working chamber that is already part of the hydraulic system. The electrical wires are routed through the housing wall rather than requiring separate sealing mechanisms, nesting multiple functions within existing structural elements to minimize overall device footprint while maintaining active control capabilities
Solution Approach 2:
The housing serves multiple functions: it contains the hydraulic chambers, provides structural support, and acts as a seal for the electrical wires passing through it. The piston combines mechanical movement with hydraulic pressure control, merging actuation and fluid control functions into a single integrated component that reduces the number of separate elements needed
2Ease of operation
If two electrical wires are connected to the actuator to enable operation, then the actuator can be powered, but sealing becomes difficult due to the need to pass wires through the anti-vibration device wall
Solution Approach 1:
The housing wall acts as an intermediary structure that provides a sealed pathway for electrical wires. Instead of requiring separate seals for each wire, the housing integrates the wire passage into its wall structure, maintaining the seal between the internal hydraulic environment and the external electrical connections while enabling power transmission to the actuator
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design results in a more compact and easily sealed anti-vibration device, effectively damping and filtering vibrations while reducing installation complexity and space requirements.
Implementation Method 1
the actuator includes a translation voice coil in the main direction of vibration, the voice coil being integral with the piston, the actuator further comprising at least one magnetic element, integral with the second armature
Implementation Method 2
an elastomer body which connects the first reinforcement to the second reinforcement, the said elastomer body being adapted to deform elastically according to a main direction of vibration by allowing relative movements between the first armature and the second armature
Implementation Method 3
the working chamber, the compensation chamber and the at least one conduit are filled with fluid
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The hydraulic anti-vibration device (10) comprises first (12) and second (14) armatures and an elastomer body (26) between the two armatures (12; 14). The second armature (14), together with the elastomer body (26) and an elastomer diaphragm (30), forms a first hydraulic chamber (36). The second armature (14) receives a piston (32) and an actuator (34) for the piston (32) to deform the elastomer diaphragm (30). The actuator (34) is electrically powered through an electrical circuit (60) comprising two conductors (64) extending partially along the principal direction of vibration (Z0) from a free end of the second armature (14). The second armature (14), together with an elastomer bellows (40), forms a second, annular hydraulic chamber (38) extending around the conductors (64). The two hydraulic chambers (36; 38) are in fluid communication through a conduit (42; 44) in the second frame (14).