Rigid Catenary Temperature Compensation Device
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Solution Overview
Problem
Current overhead rigid catenary systems face challenges with temperature compensation due to heat expansion and cold contraction, leading to complex installation requirements, potential arcing and electrical discharge, and limited applicability at higher speeds, affecting safety and reliability.
Innovation Solution
A temperature compensation device featuring slide guide rails with staggered slide ways and conductive shaft sleeves, conducting rods with spring contact fingers, and a retractable protecting sheath, allowing for smooth sliding and continuous electrical connection, ensuring stable operation and safety at higher speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a broken-type anchoring section joint structure is adopted for temperature compensation, then temperature compensation is achieved, but installation accuracy requirements are high and layout is complex
Solution Approach 1:
The device is divided into left and right slide guide rails that can move independently relative to each other, allowing each segment to handle thermal expansion/contraction separately. This segmentation simplifies the overall layout while maintaining effective temperature compensation capability.
Solution Approach 2:
The slide guide rails incorporate dynamic sliding mechanisms with slide ways and shaft sleeves that allow continuous movement during thermal expansion and contraction. This dynamic structure replaces the static broken-type joint, reducing layout complexity while maintaining compensation reliability.
2Reliability
If an expansion element is used for temperature compensation, then temperature compensation is achieved, but arcing and electrical discharge occur due to structural problems and heavy weight
Solution Approach 1:
Conducting rods serve as intermediary elements that maintain continuous electrical connection between the moving slide guide rails and the fixed busbars. This intermediary connection prevents direct contact issues between expansion elements, eliminating arcing and electrical discharge while preserving temperature compensation function.
Solution Approach 2:
The patent replaces the traditional mechanical expansion element with a sliding mechanism guided by shaft sleeves and slide ways. This mechanical substitution eliminates the structural deficiencies of expansion elements that caused arcing, while maintaining the ability to compensate for thermal effects.
3Ease of operation
If a traditional anchoring section joint structure is used, then installation is straightforward, but it cannot satisfy rapid running requirements at speeds higher than 120km/h
Solution Approach 1:
The slide guide rails with sliding mechanisms provide dynamic adjustment capability that maintains electrical continuity during high-speed pantograph movement. This dynamic structure satisfies rapid running requirements at speeds above 120km/h while keeping installation relatively simple through standardized components.
Solution Approach 2:
The device allows for adjustable parameters including the distance between contact line latch grooves and the positioning of conducting rods, enabling optimization for different speed requirements. These parameter adjustments maintain ease of installation while adapting to high-speed operation conditions.
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 provides a simple, lightweight structure for effective temperature compensation, preventing arcing and electrical discharge, ensuring smooth pantograph transition and reliable current collection, while allowing for precise installation adjustments and compensation of up to 1000mm of expansion and contraction.
Implementation Method 1
a spring contact finger is embedded into the circular through hole, and the conducting rod pass through the spring contact finger
Implementation Method 2
a wear-resisting, self-lubricating and electric-conductive shaft sleeve is embedded in the slide way
Implementation Method 3
a wear-resisting, self-lubricating and electric-conductive shaft sleeve is embedded in the slide way
Implementation Method 4
a wear-resisting, self-lubricating and electric-conductive shaft sleeve is embedded in the slide way
Data Source
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AI summary
An overhead rigid catenary temperature compensation device, having a left slide guide rail and a right slide guide rail, one end of each of which is fixedly connected to an end of each of busbars; slide ways and slide rails are manufactured throughout on inner side surfaces of the two slide guide rails, by inserting the slide rails into the slide ways on the opposite side, the two slide guide rails are connected together to be relatively slidable freely; contact line latch grooves are manufactured throughout at lower ends of outer side surfaces of the two slide guide rails, and the contact line latch grooves correspond to contact line latch grooves at lower ends of the busbars that are coupled to the contact line latch grooves; conducting rods are fixed by conducting supports and parallel conducting pedestals on top surfaces of both of the two slide guide rails, and middle sections of the conducting rods pass through the parallel conducting pedestals on the opposite side and can slide freely along with the two slide guide rails. The overhead rigid catenary temperature compensation device is installed in an overhead rigid catenary system, compensates for the heat expansion and cold contraction of the system produced due to temperature change, thereby realizing good electrical continuity and smooth transition between anchoring sections, ensuring stable operation of locomotive and improving safety and reliability of operation of locomotive.