Rotatable Compaction Plate for Ballast Bed Uniformity
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Solution Overview
Problem
Existing track construction machines face challenges in achieving uniform compaction and stability of ballast beds, particularly in stressed track sections where precise leveling and multi-layer compaction are required to maintain rail alignment and extend service life.
Innovation Solution
A track construction machine with a rotatable compaction plate that can be lowered and raised between sleepers, allowing for a larger compaction area and adjustable positioning, combined with vibration generators for enhanced compaction, enables efficient layering and distribution of ballast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-size compaction plate is used, then the structure is simple, but the compaction area is limited and cannot adapt to different track sections
Solution Approach 1:
The compaction plate is made rotatable about a transverse axis, allowing it to change its longitudinal dimension dynamically. This enables the same plate to present different effective widths for compaction depending on the rotational position, providing adaptability without requiring multiple fixed-size plates or complex adjustable mechanisms.
Solution Approach 2:
The compaction plate operates in an additional rotational dimension beyond simple linear movement. By rotating the plate about a transverse axis, the effective compaction width can be varied by changing the angle of the plate relative to the track direction, thus utilizing a second degree of freedom to achieve adaptability.
2Ease of operation
If the compaction plate is lowered between sleepers, then access to ballast bed is improved, but the compaction effectiveness is reduced without rotation mechanism
Solution Approach 1:
The compaction plate rotates dynamically after being lowered between sleepers. This rotation allows the plate to sweep across a wider area of the ballast bed, ensuring uniform compaction is achieved even when the plate starts in a constrained position between sleepers. The rotational movement compensates for the initial limited positioning.
Solution Approach 2:
The plate is first lowered between sleepers to gain access to the ballast bed, then rotated into its working compaction position. This two-stage operation (lowering first, then rotating) allows the system to overcome the constraint of sleeper spacing before achieving the optimal compaction configuration.
3Manufacturing precision
If multiple compaction passes are used to achieve uniform compaction, then compaction quality is improved, but productivity decreases
Solution Approach 1:
The rotatable compaction plate performs multiple compaction functions in a single pass by rotating during movement. Instead of requiring separate passes for different areas, the rotating plate continuously adjusts its effective width and coverage area, achieving uniform compaction across varying track sections in one continuous operation.
Solution Approach 2:
The compaction process maintains continuous useful action through the rotation mechanism. As the plate rotates during forward movement, it continuously adapts its compaction width to match the required profile, eliminating idle repositioning time between passes and maintaining productive compaction throughout the entire track section.
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 solution increases productivity and stability of the ballast bed by ensuring even distribution and compaction of ballast layers, leading to improved stability and extended service life of the track.
Implementation Method 1
the compacting device is provided with vibration generators in order to achieve an even more effective compaction of the ballast bed
Data Source
Figure 1~2
AI summary
The invention relates to a track construction machine (1), which can be moved on a track (7), for compacting a ballast bed (2) below a track (7). Said track construction machine comprises a machine frame (4), which is supported on a bogie (3), and a compacting device (5), which is connected to the machine frame (4) and which comprises at least one lowerable compacting element. According to the invention, the compacting element is designed as a compacting plate (12), which, in a working position (16), is larger in a longitudinal direction of the track (22) than a distance between two cross ties (24) of the track (4), and the compacting plate (12) is arranged for rotation in order to rotate the compacting plate (12) into a pass-through position (21) for lowering and raising between two cross ties (24).