Clutch Engagement Torque Control via Actuator Pressure Dips
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Solution Overview
Problem
Clutch engagement in agricultural machinery often results in excessive torque on the load, leading to potential damage and unnecessary activation of safety clutches, causing noise and reducing their lifespan.
Innovation Solution
A method involving a clutch system where the actuator's pressure is gradually increased while incorporating temporary pressure dips to manage torque, ensuring it remains below the load's structural limitations, and this is achieved by controlling the actuator's pressure characteristic to prevent excessive torque during initial engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the actuator pressure is gradually increased to engage the clutch plates, then the engagement is completed successfully, but the torque on the load increases excessively and may cause damage
Solution Approach 1:
The actuator pressure is applied in a periodic manner with intentional pressure dips during the engagement process. The pressure profile includes initial contact phase, engagement phase with torque-reducing pressure dips, and final coupling phase, preventing excessive torque while ensuring reliable engagement
Solution Approach 2:
The method applies preliminary action by first bringing the pressure plate into contact with the clutch plate at a lower pressure level before gradually increasing to full engagement pressure, allowing the system to prepare for the increased torque load
2Productivity
If the actuator pressure is increased quickly to engage the clutch, then the engagement time is reduced, but the torque spike activates safety clutches and causes noise
Solution Approach 1:
The pressure profile uses periodic variations with controlled dips during engagement to prevent continuous torque transmission that would trigger safety clutches and noise, while maintaining overall fast engagement through the structured pressure application sequence
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 approach reduces the maximum torque on the load, preventing safety clutch activation and noise during engagement, thereby extending the safety clutch's lifespan and ensuring smooth operation within acceptable torque limits.
Implementation Method 1
slippage occurs between engaging surfaces of the driven and driving members of the clutch while friction between these surfaces accelerates the driven shaft to the speed of the driving shaft during engagement of the clutch
Data Source
AI summary
A method for coupling a load to a power source by means of a clutch, the method having the steps ofinitially increasing the pressure of the actuator to bring the pressure plates of the clutch into contact with the clutch platesgradually increasing the pressure of the actuator even further to allow the clutch plates to be engaged with the pressure plates while decreasing at least ones the pressure during a short time to create pressure dips such that the torque generated over the load is at least temporarily decreased, andlevelling the pressure of the actuator to maintain the engagement of the pressure plates with the clutch plates to allow the load to be driven by the power source.