Vibrator for Vibratory Pile Driver with Dynamic Mass Control
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Solution Overview
Problem
Vibration generators in construction equipment face increased loads on machine elements due to changing vibration speeds, exacerbated by performance enhancements like lightweight construction and increased static moment, leading to potential damage and inefficiency.
Innovation Solution
The implementation of sensors and an evaluation unit to detect relative positions and accelerations of unbalanced masses, allowing for the determination of angular acceleration and static moment, with a control device to adjust the rotational position of unbalanced masses and regulate the vibration generator, thereby reducing load peaks and enabling automatic control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vibration speed is increased to enhance performance, then the productivity is improved, but the loads on machine elements such as bearings and couplings increase
Solution Approach 1:
The patent applies dynamics by making the imbalance masses rotatable relative to each other, allowing the static moment to be dynamically adjusted during operation. The control device rotates the imbalance masses to optimize the static moment based on operating conditions, thereby reducing dynamic loads on machine elements while maintaining high vibration speeds for improved productivity.
2Use of energy by moving object
If lightweight construction is implemented to improve performance, then the use of energy is reduced, but the loads on machine elements increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the static moment parameter through rotation of the imbalance masses. This allows the system to optimize the distribution of masses to reduce peak loads on machine elements while maintaining lightweight construction and low energy consumption, resolving the contradiction between energy efficiency and mechanical loading.
3Productivity
If the static moment is increased to enhance vibration generation, then the productivity is improved, but the loads on machine elements increase
Solution Approach 1:
The patent applies dynamics by enabling dynamic adjustment of the static moment through rotation of the imbalance masses relative to each other. The control device optimizes the static moment in real-time based on operating conditions, allowing high vibration generation capability for improved productivity while simultaneously reducing peak loads on machine elements through optimal mass distribution.
4Reliability
If sensors and control devices are added to reduce loads, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent applies feedback by using sensors to detect the relative position of imbalance masses and the acceleration of the vibration generator, then feeding this information to the control device. The control device processes this feedback to determine angular acceleration and static moment, and automatically adjusts the imbalance mass positions to reduce peak loads, thereby improving reliability through a systematic feedback control mechanism.
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 solution effectively reduces the loads on machine elements, preventing damage and improving operational efficiency by detecting and managing load peaks and adjusting the vibration generator's static moment in real-time.
Implementation Method 1
Sensors are provided for detecting the relative position of the unbalanced masses to one another and for detecting the acceleration of the vibration generator
Implementation Method 2
Vibration generators are linear vibration generators whose centrifugal force is generated by rotating imbalances
Data Source
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AI summary
The vibrator has unbalance masses (3311, 3321, 3331) arranged on shafts (33, 35) that are supported in a housing in a rotatable manner, where the shafts are provided with toothed wheels (331-333, 351-353). An adjusting unit is provided for adjusting relative rotating positions of the masses. Inductive sensors (310) are arranged at a distance to each other at the circumference of the wheels and provided for detecting an angular acceleration of the masses. The sensors are connected with a programmable controller that compares measured values detected by the sensors with maximum values.