Rotary Damper Groove Fluid Passage Adjustability
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Solution Overview
Problem
Existing rotary dampers face challenges in adjustability, durability, and wear resistance, with limited ability to adjust damping characteristics and implement delay functions without using valves at the top end of the wing, and they often require changes to the housing or shaft position.
Innovation Solution
The rotary damper incorporates grooves filled with viscous fluid in the wing and chamber walls, creating turbulent flow by narrowing and widening the fluid passage, allowing for adjustable damping and delay functions without altering the housing or shaft position, and using additional wings and insert pieces for customization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If valve bodies are inserted into axial slots in the wing tip ends to adjust damping, then damping characteristics can be adjusted, but the valve bodies wear down fast and must be replaced often
Solution Approach 1:
The invention removes the valve bodies from the wing tip ends and extracts the damping adjustment function to the fluid passages in the housing. The grooves are formed directly in the housing walls, eliminating the need for separate valve bodies that wear down and require replacement.
Solution Approach 2:
The invention uses the viscous fluid itself as an intermediary to achieve damping adjustment. By modifying the fluid passages with grooves in the housing, the damping characteristics are changed through fluid flow path modification rather than through mechanical valve bodies that are prone to wear.
2Adaptability or versatility
If the housing form or shaft position is changed to adjust damping characteristics, then damping can be adjusted, but the housing and shaft position are fixed and cannot be easily modified
Solution Approach 1:
The invention segments the housing into modular components with fluid passages that can be independently configured. The grooves in the housing walls create adjustable fluid flow paths without requiring changes to the overall housing form or shaft position, allowing easy adjustment of damping characteristics.
Solution Approach 2:
The invention applies local quality changes by forming grooves in specific locations of the housing walls to modify fluid passages. This allows localized adjustment of damping characteristics without changing the global structure of the housing or position of the shaft.
3Adaptability or versatility
If needle valves are provided in axial grooves to increase damping and create delay, then damping can be increased, but the configuration becomes complex and requires additional components
Solution Approach 1:
The invention merges the delay function directly into the fluid passage structure by forming grooves in the housing walls. This eliminates the need for separate needle valves and axial grooves, combining the damping and delay functions into the housing structure itself, thereby reducing device complexity.
Solution Approach 2:
The housing structure itself provides the delay function through its groove features that modify fluid passages. The system serves itself by using the housing geometry to create the necessary flow restrictions and delay effects without requiring additional valve components.
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 enhances damping and allows for adjustable delay functions at various movement positions, increasing durability and wear resistance, enabling easy adjustment of damping characteristics without replacing parts or altering the housing.
Implementation Method 1
a fluid passage between the wing and a wall of the fluid chamber for allowing the viscous fluid to flow between the first side and the second side of the wing
Implementation Method 2
at least one groove is provided in the fluid passage, the groove being provided in a side of the wing and/or in a wall of the fluid chamber
Data Source
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AI summary
Rotary damper (4) comprising: a housing (5) having at least one fluid chamber (6) filled with a viscous fluid; a wing shaft (7) with a wing (8) projecting in a radial direction of the wing shaft toward a curved cylindrical and/or conic side wall (10) of the fluid chamber (6) and comprising: a first side (11), a second side (12), a top side (13), a bottom side (27) and an upper side (28); a fluid passage (15) between the first wing (8) and a wall (25, 26, 10) of the fluid chamber (6) wherein at least one groove (16.1, 16.3, 16.5, 16.7, 16.9, 16.11, 16.12) is provided, the groove being provided in a side (13, 27, 28, 31) of the wing (8) and/or in a wall (10, 25, 26, 30) of the fluid chamber (6). The at least one groove is entirely filled with the viscous fluid, the viscous fluid in the at least one groove being in fluid communication with the viscous fluid of the fluid passage allowing the viscous fluid of the fluid passage to flow through the at least one groove.