Damper Device Elastic Valve Braking Torque Durability
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Solution Overview
Problem
Existing damper devices face challenges in achieving accurate braking torque and durability due to the movable valve receiving a large load, leading to damage and reduced durability.
Innovation Solution
The damper device incorporates a rotational wing with a viscous-fluid passage and an elastic valve that opens and blocks the passage based on rotor direction, using silicone oil and ethylene-propylene-diene rubber to ensure precise braking torque and improved durability by minimizing valve load and resisting temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a movable valve is used to control viscous fluid flow, then the braking torque can be adjusted, but the valve receives large loads causing damage and reduced durability
Solution Approach 1:
The patent extracts the valve from the high-load braking torque transmission path. The valve is now only responsible for controlling fluid flow direction, while the braking torque is generated by the viscous fluid flowing through fixed passages between the rotor and housing, eliminating the large loads on the valve
Solution Approach 2:
The patent introduces the viscous fluid as an intermediary to transmit the braking torque. Instead of the valve directly handling torque transmission, the fluid acts as a mediator that carries the braking force from the rotor to the housing, protecting the valve from large mechanical loads
2Adaptability or versatility
If the valve is disposed to be movable and rotatable to control fluid flow, then flow direction can be changed, but it is difficult to obtain desired braking torque with certain accuracy
Solution Approach 1:
The patent inverts the approach: instead of using a movable valve to create precise passages, it uses fixed passages and a movable rotor to achieve both flow direction control and precise braking torque. The rotor's position relative to the housing passages naturally controls flow direction while maintaining accurate torque
Solution Approach 2:
The patent replaces the mechanical valve system with a fluid-based control system. The movable rotor directs fluid flow through fixed passages, substituting the complex mechanical valve mechanism with a simpler rotational element that achieves both adaptability and precision
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 solution achieves high accuracy in braking torque generation while enhancing the durability of the damper device by maintaining a constant passage gap and reducing valve damage, allowing operation in cold climates without issues.
Implementation Method 1
A damper device is generally composed of a housing; viscous fluid filled inside the housing; a rotor rotatably disposed inside the housing
Implementation Method 2
A valve or valve device may be provided on the rotational wing, and is formed of an elastic member capable of deforming elastically
Data Source
AI summary
A damper device includes a housing; a viscous fluid filled inside the housing; a rotor rotatably disposed inside the housing; and a sealing member for preventing the viscous fluid from leaking through the rotor and the housing. A rotational wing with a viscous-fluid passage is provided on one of the housing and the rotor. The rotational wing moves relative to the viscous fluid in a circumferential direction, and extends in a radial direction for dividing a housing portion of the housing filled with the viscous fluid. A valve is provided on the rotational wing, and is formed of an elastic member capable of deforming elastically. The valve opens the viscous-fluid passage when the rotor rotates in one direction, and blocks the viscous-fluid passage when the rotor rotates in the other direction.