Bellows-Sealed Fluid Equipment for Low-Friction Energy Transfer
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Solution Overview
Problem
Existing hydraulic cylinder designs experience friction issues between the cylinder tube and seal rings, leading to reduced operability of the piston due to sliding friction, which affects the efficiency and reliability of power transmission.
Innovation Solution
The design incorporates a first bellows with a sealed end portion and a fixed end portion, separating the first and second fluid paths, and utilizes non-compressible fluids to reduce friction and enhance operability, along with a second bellows of smaller diameter and a guide portion to stabilize and guide the moving member, preventing fluid mixing and improving movement stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If seal rings and backup wear rings are used to divide fluid pressure chambers, then fluid sealing is improved, but friction between the cylinder tube and seal rings increases
Solution Approach 1:
The seal rings and backup wear rings are extracted from the cylinder tube and transferred to the piston. This allows the piston to maintain sealing functionality while eliminating the sliding friction between the seal rings and the cylinder tube, thereby improving piston operability without compromising fluid sealing reliability
2Device complexity
If a single seal ring is used for sealing, then device complexity is reduced, but sealing reliability deteriorates
Solution Approach 1:
The seal ring and backup wear ring are merged into a single integrated component mounted on the piston. This combination maintains the sealing functionality of both elements while reducing the number of separate parts, thus simplifying the sealing structure without compromising sealing reliability
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
This configuration reduces friction, prevents fluid mixing, and enhances the operability and stability of the moving member, allowing for efficient energy transmission while maintaining the integrity of the hydraulic system components.
Implementation Method 1
a first bellows capable of expanding and contracting... An inside of the first bellows is capable of communicating with the first fluid outlet/inlet path
Implementation Method 2
a moving member capable of moving in the container in response to the pressure of the first fluid, the fluid equipment transmitting energy from the first fluid to the second fluid
Data Source
AI summary
Fluid equipment includes a container configured for having first and second fluids therein, a first fluid outlet/inlet path provided for outflow and inflow of the first fluid, a second fluid outlet/inlet path for outflow and inflow of the second fluid, and a member configured for moving in the container in response to pressure of the first fluid, the fluid equipment transmitting energy from the first to the second fluid. A first bellows is configured such that one end is closed in a sealed state by the moving member, the other end is fixed to an inner surface part of the container in a sealed state, and the inside of the first bellows communicates with the first fluid outlet/outlet path.