Drilling Machine Damping Chamber Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rock drilling methods face challenges in maintaining optimal percussion pressure, leading to idle percussion and self-oscillation, which can damage equipment and reduce drilling efficiency, especially in varying rock conditions.
Innovation Solution
A method and device that control percussion pressure as a function of damping chamber pressure, adjusting between start-up and normal drilling levels based on pressure levels in the damping chamber, ensuring correct percussion pressure is maintained to prevent damaging reflexes and optimize contact with the rock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If percussion pressure is increased to normal drilling level when damping pressure exceeds a defined level, then drilling efficiency is improved, but the risk of idle percussion and damaging reflexes increases when contact with rock is poor
Solution Approach 1:
The control system continuously monitors damping pressure and uses it as feedback to dynamically adjust percussion pressure. When damping pressure indicates poor rock contact, the system automatically reduces percussion pressure to prevent idle percussion and damaging reflexes, while maintaining high efficiency when contact is good.
Solution Approach 2:
The percussion pressure is made dynamically adjustable based on real-time damping pressure conditions. The system transitions between different pressure levels (start-up, normal, and intermediate) depending on the damping pressure, allowing optimal adaptation to varying rock contact conditions throughout the drilling process.
2Adaptability or versatility
If damping pressure is used to control percussion pressure with continuous adjustment, then optimal percussion pressure is maintained in varying conditions, but the control system complexity increases
Solution Approach 1:
The system controls percussion pressure by changing the damping chamber pressure as the primary control parameter. This parameter change approach allows continuous adaptation to varying rock conditions while using a relatively simple control mechanism that adjusts pressure levels based on damping pressure feedback.
Solution Approach 2:
The damping chamber pressure serves as an intermediary parameter that mediates between the percussion mechanism and the rock contact conditions. By controlling percussion pressure through this intermediate damping pressure parameter, the system achieves adaptive control without requiring direct complex sensing and control of rock contact quality.
3Productivity
If percussion pressure is kept at normal drilling level when damping pressure is between start-up and normal levels, then drilling efficiency is maintained, but damaging reflexes occur when rock contact deteriorates
Solution Approach 1:
The system takes preliminary anti-action by reducing percussion pressure in advance when damping pressure indicates deteriorating rock contact. This prevents the occurrence of idle percussion and damaging reflexes before they can occur, rather than reacting after damage has been done.
Solution Approach 2:
The control system performs preliminary action by proactively adjusting percussion pressure based on damping pressure trends. When damping pressure begins to decrease from normal levels, the system preemptively reduces percussion pressure to maintain optimal conditions and prevent harmful reflexes before contact deterioration becomes severe.
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 risk of idle percussion and self-oscillation, extends the life of drill components, and enhances drilling sensitivity by maintaining optimal percussion pressure, even in conditions with varying rock hardness and contact quality.
Implementation Method 1
a damping piston, which is also used to damp reflexes from the impact of the shock waves against the rock. During drilling, the damping piston is pressed against the drill steel, and the drill steel is thus pressed against the rock, by pressurization of a pressure chamber working against the damping piston.
Implementation Method 2
a percussion piston, which is often operated hydraulically, is used to create a shock wave with the aid of an impact force that is generated by hydraulic pressure (percussion pressure), the shock wave being transmitted to the drill bit and hence to the rock through the drill steel (drill string).
Implementation Method 3
create a shock wave with the aid of an impact force that is generated by hydraulic pressure
Implementation Method 4
a damping piston, which is also used to damp reflexes from the impact of the shock waves against the rock
Data Source
AI summary
The present invention relates to a method and a device for controlling at least one drill parameter when drilling in rock with a drilling machine. During drilling, an impulse-generating device uses an impact means to induce shock waves in a tool working against the rock, a pressure level for a shock-wave-generating pressure is controlled during the drilling, and said drilling machine includes a damping chamber that can be pressurized. The contact of the drilling machine against the rock is affected at least partially by the pressure prevailing in said damping chamber. When the pressure in said damping chamber exceeds said first level and is below said second level, the percussion pressure is controlled as a function of the pressure in said damping chamber.