Hydraulic Clutch Assembly with Fluid Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Mechanical clutches face issues such as wear, insufficient axial force for power transmission, excessive heat, shock, and damage from prolonged slipping modes, which limit their capabilities and lifespan in applications like marine and hybrid drive systems.
Innovation Solution
The development of a hydraulic actuated clutch system with a fluid coupling mechanism that provides controlled axial compression and disengagement of clutch discs, utilizing a fluid bath for cooling and torque transmission through fluid shear forces, and serrated Belleville springs for balanced separation and engagement, allowing for extended slipping mode operation without adverse consequences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If mechanical clutches use high friction material on discs to enhance engagement, then power transmission capability is improved, but heat generation increases and clutch life is reduced
Solution Approach 1:
The patent introduces a hydraulic actuation system with a piston and hydraulic fluid to apply axial force to the clutch discs, replacing traditional mechanical spring-based actuation. This hydraulic system allows for more controlled and distributed force application, reducing peak temperatures while maintaining adequate friction engagement for power transmission.
Solution Approach 2:
The patent introduces a fluid coupling mechanism as an intermediary between the driver and driven devices. This fluid coupling allows torque transmission through fluid shear forces, distributing the power transmission load away from the friction discs and reducing the heat generation associated with high-friction material engagement.
2Power
If mechanical clutches apply sufficient axial force to transmit required power, then power transmission capability is improved, but wear of clutch discs increases
Solution Approach 1:
The hydraulic actuation system provides controlled axial force application to the clutch discs, allowing for optimized force distribution that maintains adequate power transmission while reducing excessive compression that accelerates wear. The hydraulic system can modulate force more precisely than mechanical springs.
Solution Approach 2:
The fluid coupling acts as an intermediary torque transmission mechanism, allowing power to be transmitted through fluid shear rather than direct friction contact. This reduces the wear burden on the clutch discs while maintaining the required power transmission capability.
3Productivity
If mechanical clutches engage rapidly to transmit power quickly, then productivity is improved, but shock and jarring damage to driven devices increases
Solution Approach 1:
The hydraulic actuation system inherently provides smooth, controlled engagement by utilizing fluid compression and flow characteristics. The hydraulic fluid acts as a cushion, distributing the engagement force over time and preventing sudden shocks to the driven devices while still achieving rapid engagement when needed.
Solution Approach 2:
The hydraulic system provides beforehand cushioning through the compressibility and viscosity of the hydraulic fluid, which absorbs and distributes engagement forces before they reach the clutch discs and driven devices. This prevents shock and jarring during engagement while maintaining productivity.
4Adaptability or versatility
If mechanical clutches operate in slipping mode for extended periods, then adaptability is improved, but damage to clutch components increases
Solution Approach 1:
The fluid coupling serves as an intermediary that enables extended slipping mode operation without damaging the clutch components. Torque can be transmitted through the fluid shear forces even when the clutch discs are slipping, allowing the mechanical clutch to operate in a protective capacity rather than bearing the full load during slipping conditions.
Solution Approach 2:
The hydraulic actuation system provides controlled axial force that can be modulated to allow extended slipping operation. The hydraulic system can maintain adequate disc contact pressure for power transmission while preventing excessive compression that would cause damage during prolonged slipping conditions.
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 enhances power transmission capabilities, extends clutch lifespan, reduces wear and heat issues, and enables controlled engagement and disengagement, allowing for efficient operation in marine and hybrid drive systems with reduced risk of damage from slipping.
Implementation Method 1
torque transmission through fluid shear forces
Implementation Method 2
utilizing a fluid bath for cooling
Implementation Method 3
serrated Belleville springs for balanced separation and engagement
Implementation Method 4
hydraulic actuated clutch system with a fluid coupling mechanism that provides controlled axial compression
Data Source
AI summary
Power transmission systems including clutch arrangements and systems are adapted to be used in marine and other environments. Such power transmission systems may include clutch arrangements that provide more effective power transmission capabilities as well as greater durability and longer life. Slipping clutch arrangements may effectively vary the output speed of a clutch arrangement from the speed of the engine or other driver as desired for the particular application. Various clutch arrangements also provide for greater flexibility and drive options, lighter weight, and diverse types of capabilities.