Double-Pole Train Current Collector for Vibration-Decoupled Rail Contact
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Solution Overview
Problem
Rigid current collection systems in high-speed railways are limited by structural form, suspension methods, span length, and dynamic performance, leading to adverse effects from lateral and vertical vibrations, which compromise contact current collection performance.
Innovation Solution
A double-pole current collecting device with a collector arm and reflux arm connected to a bogie, featuring a crossbeam, bearing seats, a rotating shaft, booster springs, and limiting plates, which decouples vibrations and maintains constant contact area between collector shoes and power supply rails, and reflux shoes and reflux rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a rigid current collection system is used, then the structure is simple and current capacity is high, but lateral and vertical vibrations of the train adversely affect contact current collection performance
Solution Approach 1:
The current collection system is segmented into independent suspension components (collector arm, reflux arm, collector shoe, reflux shoe) that can move relative to each other. This segmentation allows the rigid power supply rails to be decoupled from train vibrations through flexible connection elements, maintaining structural simplicity while improving contact reliability during high-speed operation
Solution Approach 2:
Flexible connection elements (hinges, springs, and suspension mechanisms) are introduced as intermediaries between the rigid power supply rails and the train body. These intermediaries absorb and isolate lateral and vertical vibrations, preventing them from being transmitted to the contact interface between collector shoes and rails, thus maintaining stable current collection performance
2Productivity
If the train runs at high speed, then productivity is improved, but vibrations severely limit the performance of contact current collection
Solution Approach 1:
The system transitions from a static rigid connection to a dynamic suspension structure where collector arms and reflux arms can adaptively move in response to train vibrations. The flexible suspension components provide dynamic adjustment capability that maintains optimal contact conditions between collector shoes and power supply rails even at high speeds, enabling productivity improvement without sacrificing current collection reliability
3Device complexity
If a monopole contact current collection method is used, then the system is simple, but it cannot effectively eliminate the influence of train vibrations on current collection
Solution Approach 1:
The system merges the power supply function and current reflux function into a unified double-pole current collection structure. By combining collector arms with reflux arms and coordinating their suspension mechanisms, the system achieves vibration elimination for both current collection paths simultaneously, effectively addressing harmful vibration influences while maintaining reasonable system simplicity through functional integration
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 device effectively eliminates the impact of lateral and vertical vibrations on current collection, maintaining constant contact areas and enhancing high-speed railway performance by decoupling vibration forces and ensuring consistent contact pressure.
Implementation Method 1
two ends of a booster spring are fixed to the middle part of the collector arm and the middle part of the current reflux arm respectively
Implementation Method 2
the top end of the collector arm and the top end of the current reflux arm are hingedly connected with the bearing seats respectively via a rotating shaft arranged in parallel to the longitudinal direction of the train
Data Source
Figure 1
Figure 2
AI summary
Provided is a current collecting device for a train, comprising a collector arm (1) and a current reflux arm (2) connected with a bogie. The current collecting device for a train further comprises: two sets of bearing seats (8), located on the bogie, wherein a top end of the collector arm (1) is hingedly connected with one of the two sets of bearing seats (8), and a top end of the current reflux arm (2) is hingedly connected with the other one of the two sets of bearing seats (8); a collector shoe (3); a reflux shoe (4), wherein a fixed end of the collector shoe (3) is hingedly connected with a bottom end of the collector arm (1), a free end of the collector shoe (3) is arranged in contact with a power supply rail (10), the fixed end of the reflux shoe (4) is hingedly connected with a bottom end of the reflux arm (2), and a free end of the reflux shoe (4) is arranged in contact with a reflux rail (11); a booster spring (6), wherein one end of the booster spring (6) is connected with the collector arm (1), and the other end of the booster spring (6) is connected with the reflux arm (2). The current collecting device for a train can effectively eliminate the interference on contact-type current collection on the train caused by lateral and vertical vibrations of the train.