Shovel Attachment Speed Control for Jacked-Up State Shock
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Solution Overview
Problem
Shovels experience significant shock when transitioning out of a jacked-up state, which can lead to reduced lifespan, safety concerns, and operational discomfort due to rapid contact with the ground, particularly during excavation and crawler mud removal processes.
Innovation Solution
A shovel equipped with a processor-controlled operation support system that slows down the attachment's movement during the termination of a jacked-up state by adjusting the flowrate of hydraulic oil to the boom cylinder, thereby reducing the shock impact on the vehicle body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the attachment operation is performed at normal speed to terminate the jacked-up state, then the operational efficiency is improved, but the shock impact on the vehicle body increases
Solution Approach 1:
The system dynamically adjusts the attachment operation speed based on the detected state. When a jacked-up state is detected, the control device automatically slows down the attachment operation in the lowering direction, transitioning from normal high-speed operation to controlled low-speed operation, thereby resolving the contradiction between operational efficiency and shock impact.
Solution Approach 2:
The control device continuously monitors the shovel's operational state and provides feedback control. When the jacked-up state is detected through sensors monitoring attachment position and hydraulic pressure, the system responds by adjusting the hydraulic flow rate to reduce lowering speed, thus minimizing shock while maintaining operational effectiveness.
2Stability of the object's composition
If the attachment operation is slowed down to reduce shock impact, then the vehicle body stability is improved, but the operational efficiency decreases
Solution Approach 1:
The system implements dynamic speed adjustment rather than constant slow operation. The attachment operation speed is adaptively controlled based on real-time detection of the jacked-up state, providing slow operation only when needed for stability during state termination, while maintaining normal operational speed during other phases, thus balancing stability and efficiency.
Solution Approach 2:
The control device detects the jacked-up state in advance and proactively adjusts the attachment operation speed before significant shock can occur. By preliminarily identifying the state through monitoring attachment position and hydraulic pressure, the system prepares the hydraulic system to reduce flow rate, preventing excessive shock while minimizing the duration of reduced operational efficiency.
3Loss of time
If the attachment operation is rapidly executed to quickly terminate the jacked-up state, then the time required is reduced, but the shock and wear on components increases
Solution Approach 1:
The system utilizes hydraulic flow control to manage the attachment lowering speed. By adjusting the hydraulic flow rate through the control device during attachment operation, the system achieves controlled deceleration that reduces mechanical shock and component wear while maintaining reasonable operational timing, avoiding both rapid impact and prolonged slow operation.
Solution Approach 2:
The control device changes the operational parameters of the hydraulic system based on detected state. When a jacked-up state is identified, the system modifies the hydraulic flow rate parameter to reduce attachment lowering speed, thereby reducing shock and component stress. This parameter adjustment is temporary and automatic, resolving the contradiction between time loss and component reliability.
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 system effectively minimizes shock upon ground contact, enhancing the shovel's operational safety, reducing wear and tear, and alleviating operator fatigue by gradually lowering the attachment, thus maintaining vehicle stability and comfort.
Implementation Method 1
adjusting the flowrate of hydraulic oil to the boom cylinder
Implementation Method 2
after the shovel enters the state in which the traveling body is lifted
Data Source
AI summary
A shovel includes a traveling body, a turning body turnably mounted on the traveling body, an attachment attached to the turning body and including a boom, an arm, and a bucket, and a processor, wherein the processor is configured to relatively slow down an operation of the attachment in such a direction as to terminate a state in which the traveling body is lifted, after the shovel enters the state in which the traveling body is lifted.