Rotary Damper Vane Valve Structure for Faster Oil Flow Response
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Solution Overview
Problem
Existing rotary dampers face limitations in improving valve responsiveness and reducing oil resistance on a vane when the valve body receives pressure from the opposite direction due to narrow gaps and restricted oil flow rates.
Innovation Solution
A rotary damper design featuring a valve body with a slope-based groove and an elastic body that maintains contact with the oil chamber wall, allowing for increased oil flow and reduced resistance by ensuring the valve body moves away from the wall surface when pressure is applied from the opposite direction, utilizing a triangular prism-shaped valve body and a spring-like elastic body for enhanced responsiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the valve body moves away from the one surface of the vane by receiving pressure from the opposite direction, then the valve responsiveness is improved, but the gap formed between the valve body and the one surface of the vane is narrow, limiting the oil flow rate
Solution Approach 1:
The invention changes the movement direction of the valve body from a direction creating a narrow gap to a direction moving along the oil passage axis. The valve body is configured to move in the oil passage direction (parallel to oil flow) rather than perpendicular to it, allowing the elastic body to push the valve body along the groove toward the opposite surface of the vane, thereby opening the oil passage without creating restrictive gaps.
Solution Approach 2:
Instead of having the valve body move away from the one surface of the vane to improve responsiveness, the invention inverts the approach by having the valve body move toward the opposite surface of the vane along the oil passage. This inversion allows the valve body to open the oil passage effectively while maintaining proper clearance, solving both responsiveness and flow rate issues simultaneously.
2Device complexity
If the gap between the valve body and the one surface of the vane is narrow, then the valve structure is compact, but the flow rate of oil passing through the groove is limited, increasing oil resistance
Solution Approach 1:
The invention resolves the conflict between compact structure and low oil resistance by changing the dimension of valve body movement. Instead of moving perpendicular to the oil passage (which creates narrow gaps), the valve body moves parallel to the oil passage direction, opening the passage width without compromising structural compactness. The elastic body mechanism maintains a compact design while enabling sufficient oil flow.
3Device complexity
If the elastic body deformation is limited, then the valve structure is simple, but the gap formed between the valve body and the one surface of the vane is narrow, restricting oil flow
Solution Approach 1:
The invention inverts the traditional elastic body mechanism configuration. Instead of the elastic body creating a narrow gap by limited deformation, the elastic body is configured to push the valve body in the opposite direction along the oil passage, effectively opening the passage. This inversion allows the same simple elastic body mechanism to achieve both structural simplicity and adequate oil flow rate.
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 design enhances valve responsiveness and reduces oil resistance on the vane by allowing unobstructed oil flow, maintaining consistent performance across varying temperatures and rotational forces, thereby improving the rotary damper's efficiency and stability.
Implementation Method 1
an elastic body which applies elasticity to the valve body and causes the valve body to come into contact with a wall surface of the oil chamber when the oil does not flow
Implementation Method 2
the valve body which is in contact with the wall surface of the oil chamber when receiving pressure of the oil from one direction moves away from the wall surface of the oil chamber when receiving the pressure of the oil from an opposite direction
Data Source
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AI summary
Provided is a rotary damper having a first valve provided in a first oil passage, the rotary damper including an oil chamber filled with oil; a vane located in the oil chamber; a groove which is formed in the vane and functions as a valve box of the first valve; a valve body of the first valve which moves while being in contact with a bottom surface of the groove; and an elastic body which applies elasticity to the valve body, and causes the valve body to come into contact with a wall surface of the oil chamber when the oil does not flow, in which the bottom surface of the groove is a slope, and thereby the valve body which is in contact with the wall surface when receiving oil pressure from one direction moves away from the wall surface when receiving the oil pressure from an opposite direction.