Pressure-Compensated Load Transfer with Negative-Stiffness Beams
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing pressure-compensated load transfer devices struggle to efficiently transfer motion between spaces with significantly different pressure levels, often exceeding the capacity of shakers or actuators when the high-pressure side pressure is excessively higher, leading to loss in load transfer.
Innovation Solution
A pressure-compensated load transfer device incorporating a flat plate with perpendicularly disposed shafts, bellows, and flexible beams, along with springs and compressive-adjusting means, which utilizes negative stiffness to balance forces and efficiently transfer load between high and low-pressure sides, minimizing stiffness in the moving direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a shaker or actuator generates motion to transfer from low-pressure side to high-pressure side, then motion transfer is achieved, but the capacity of the shaker or actuator is exceeded when pressure difference is excessively high, resulting in no motion provided
Solution Approach 1:
A flexible beam is introduced as an intermediary mechanical element between the actuator and the bellows system. The flexible beam has a specific stiffness design that allows it to deform under pressure differential, mechanically coupling the low-pressure and high-pressure sides while transmitting motion. This mediator enables motion transfer across large pressure differences without requiring the actuator to directly overcome the full pressure differential force.
Solution Approach 2:
The stiffness parameter of the flexible beam is specifically designed and adjusted to optimize load transfer. By changing the stiffness parameter of the flexible beam, the system can adapt to different pressure differential conditions, allowing efficient motion transfer even when the pressure difference between sides is excessively high.
2Stability of the object's composition
If high stiffness is used in the load transfer device, then structural stability is improved, but stiffness in the moving direction increases, causing loss in load transferred
Solution Approach 1:
The flexible beam is designed with non-uniform cross-sectional properties along its length, creating different local stiffness characteristics. The beam has higher stiffness in directions perpendicular to motion for structural stability, while maintaining lower stiffness in the moving direction to reduce energy loss. This local quality differentiation allows simultaneous achievement of structural stability and efficient load transfer.
Solution Approach 2:
The flexible beam introduces dynamic compliance to the system, allowing controlled deformation during operation. The beam's flexibility enables it to adaptively deform under varying pressure differentials and load conditions, optimizing the balance between structural stability and energy-efficient motion transfer throughout the operating range.
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 device achieves uniform load transfer and reduced stiffness in the moving direction, minimizing losses and ensuring effective motion transfer across varying pressure levels by using static load balance and negative stiffness of flexible beams.
Implementation Method 1
load can be more efficiently transferred using negative stiffness of the flexible beams
Implementation Method 2
a first bellows having an opening provided in one side to surround the first shaft, with the other side being fixed to the surface of the plate
Data Source
AI summary
Provided are embodiments of a pressure-compensated load transfer device that includes a plate having a first shaft vertically installed on one side and a second shaft vertically installed on the other side to be coaxial with the first shaft. Also included is a first bellows having an opening in one side to surround the first shaft, with the other side thereof being fixed to the one side of the plate. Further included is a plurality of second bellows each having an opening in one end, with the other end thereof being attached to the other side of the plate. A housing is also included, and the housing includes a high-pressure working hole communicating with the opening of the first bellows and a high-pressure channel coplanar with the high-pressure working hole and communicating with the openings of the second bellows. The plate is back-and-forth movably received in the housing.