Excavator Compactor Hydraulic Rectifier Amplitude Control
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Solution Overview
Problem
Existing attachment compressors for construction machines, such as excavators, face challenges in efficiently managing the vibration amplitude and direction, leading to mechanical stress and reduced lifespan when switching between operating modes.
Innovation Solution
The proposed solution involves a hydraulic circuit with a hydraulic rectifier and a separate device for amplitude adjustment, allowing for independent control of the vibrator's drive and amplitude. This decouples the amplitude from the vibration, enabling consistent operation direction and reducing mechanical stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reversing weight is used to adjust vibration amplitude by changing rotation direction, then amplitude adjustment is achieved, but mechanical stress increases and reliability decreases due to abrupt direction switching
Solution Approach 1:
The patent segments the control of vibration parameters by separating amplitude adjustment from rotation direction control. The vibration exciter maintains constant rotation direction while amplitude is adjusted independently through a separate control mechanism, eliminating the need for reversing weights and abrupt direction changes.
Solution Approach 2:
The patent implements dynamic amplitude adjustment during operation without changing rotation direction. The vibration amplitude can be continuously varied while the exciter rotates in one direction, allowing flexible adaptation to different compacting requirements without mechanical stress from direction reversal.
2Ease of operation
If the vibration exciter is driven by bidirectional hydraulic flow, then operation flexibility is improved, but mechanical stress increases due to frequent direction changes
Solution Approach 1:
Instead of using bidirectional hydraulic flow to control rotation direction, the patent inverts the approach by maintaining unidirectional rotation and using separate mechanisms for amplitude control. The hydraulic system provides constant directional flow while amplitude modulation is achieved through other means, reducing mechanical stress from flow direction changes.
3Adaptability or versatility
If the handling weight position is used to control vibration intensity, then amplitude adjustment is possible, but the indifferent position causes unreliable operation
Solution Approach 1:
The patent implements a controlled feedback mechanism where the vibration amplitude is actively regulated through a dedicated control system rather than relying on the passive position of a handling weight. This ensures reliable amplitude control without the indifference problem, as the system actively maintains the desired vibration intensity.
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 design allows for reduced mechanical stress and increased lifespan of the compressor by decoupling the amplitude from the vibration, enabling consistent operation direction and reducing wear and tear.
Implementation Method 1
a hydraulic circuit which comprises a hydraulic rectifier and is designed such that a first part H of the directionally variable volume flow which can be supplied via the hydraulic connection is directed in the same direction as its flow direction to a drive of the vibration exciter
Implementation Method 2
a vibration exciter which is arranged and configured to cause the compactor plate to vibrate and which can be driven via the hydraulic connection by means of the volume flow
Implementation Method 3
a second part N of the directionally variable volume flow which can be supplied is directed in a non-rectified manner to a device for adjusting the amplitude of the vibration exciter
Data Source
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AI summary
The invention relates to an attachment compactor (1) for compacting a subsoil, with a fastening device (2) by means of which it can be connected as an attachment to a construction machine, in particular an excavator, with a compaction plate (3) which is arranged for compacting a subsoil, with a hydraulic connection (4) via which a directionally variable volume flow of a hydraulic fluid can be supplied from the construction machine and a vibration exciter (8) which is arranged to set the compaction plate (3) into vibration and which can be driven via the hydraulic connection (4) by means of the volume flow.According to the invention, the attached compressor (1) has a hydraulic circuit comprising a hydraulic rectifier (11-12-13-14) and is designed such that a first part of the variable-flow volume flow that can be supplied via the hydraulic connection (4) is directed in the same direction as the flow to a drive (15) of the vibration exciter (8), and a second part of the variable-flow volume flow that can be supplied is directed in a different direction to a device (10) for adjusting the amplitude of the vibration exciter (8).