Track Tamping Assembly With Multi-Depth Sleeper Compaction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing track tamping methods struggle to achieve high-quality tamping results, particularly when significant track elevation is involved, leading to issues like hollow sections and increased wear on tamping units and ballast, and require multiple passes for compaction.
Innovation Solution
The method involves adjusting the tamping picks of multiple units to different depths in the ballast bed during each cycle, with coordinated vibration and positioning parameters, allowing for simultaneous tamping of multiple sleepers at varying depths, reducing the need for multiple passes and enhancing compaction uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple tamping units tamp sleepers at the same depth in the ballast bed, then the tamping process is simple and fast, but the compaction is non-uniform and hollow sections occur especially when track elevation is significant
Solution Approach 1:
The tamping unit is divided into multiple independently controllable tamping units (first, second, third units), each capable of independent vertical movement and vibration. This segmentation allows each unit to operate at different depths and with different parameters, enabling uniform compaction throughout the ballast bed without requiring complex coordinated control
Solution Approach 2:
Different tamping units are assigned different immersion depths in the ballast bed. The first tamping unit operates at a first depth, the second at a second depth, and the third at a third depth. This local differentiation ensures that each layer of the ballast bed receives appropriate compaction energy, eliminating hollow sections while maintaining relatively simple device architecture
2Manufacturing precision
If the same ballast layer is repeatedly compressed during multiple tamping passes, then thorough compaction is achieved, but ballast wear increases and processing time extends
Solution Approach 1:
Instead of achieving compaction through multiple passes in the horizontal dimension, the invention transitions to the vertical dimension by deploying multiple tamping units at different depths simultaneously. This dimensional shift allows the entire ballast bed to be compacted in a single pass, reducing processing time while maintaining compaction quality and minimizing ballast wear
Solution Approach 2:
Multiple tamping units operate simultaneously and continuously at different depths, ensuring that the entire ballast bed is compacted in one continuous action rather than through repeated sequential passes. This eliminates idle time between passes and reduces overall cycle time while achieving thorough compaction
3Manufacturing precision
If tamping picks are lowered to greater immersion depths to compact deeper ballast layers, then deep compaction is achieved, but wear on tamping units and ballast increases
Solution Approach 1:
The compaction task is segmented across multiple tamping units operating at different depths. Rather than one unit penetrating deeply and causing wear, multiple units distribute the compaction effort across shallow to moderate depths, achieving deep overall compaction through cumulative effect while minimizing wear on individual picks and ballast grains
Solution Approach 2:
The compaction effect of multiple tamping units operating at different depths is merged to achieve uniform compaction throughout the ballast bed. This combined approach replaces the need for any single unit to penetrate deeply, reducing wear while maintaining effective deep compaction through the synergistic action of multiple units
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 ensures homogeneous compaction of the ballast layer, reduces ballast load, minimizes wear, and saves time by eliminating the need for repeated tamping operations, resulting in a stable and durable track alignment.
Implementation Method 1
a tamping unit (7) for simultaneously tamping several sleepers (4) of a track (3) positioned one behind the other by means of several tamping units (14) arranged one behind the other
Implementation Method 2
These tamping tools can be set into vibration by means of drives and can be positioned relative to one another
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a method and machine for tamping multiple sleepers (4) of a track (3) laid successively in a ballast bed (2) by means of a tamping assembly (7), comprising multiple independently height-adjustable tamping units (14) arranged successively in a working direction (25) and having tamping tines (22) that can be provided relative to one another, wherein, during a tamping cycle, the tamping tines (22) of a front tamping unit (14) and the tamping tines (22) of a rear tamping unit (14) are lowered into the ballast bed (2) to different depths (Ti, T2, T3), wherein the tamping assembly (7) is moved onwards for the next tamping cycle in the working direction and by a number of sleepers (4) that is lower than the number of successively arranged tamping units (14). In this way, the successively arranged tamping units (14) tamp the same sleeper (4) multiple times in different depth zones (Ζ1, Z2, Z3) of the ballast bed (2).