Rail Brake End Piece Segmentation for Wear Reduction
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Solution Overview
Problem
Existing link-type magnetic rail brake devices have high operating costs due to extensive wear on braking components and complex power supply requirements, limiting their efficiency and practicality for rail vehicles.
Innovation Solution
A sectional magnetic rail brake device with a magnet coil body featuring end members with detachable lower parts for reduced wear and an integrated electrical connection system for simplified power supply, allowing for modular design and reduced mass of replaceable parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the pole shoes are formed on the end faces of the magnetic cores of the intermediate links that face the rail, then the braking force is generated through frictional contact with the rail, but the mass of the parts to be replaced increases due to extensive wear on the braking components
Solution Approach 1:
The end piece is divided into a first upper portion and a second lower portion that can be separately replaced. The first upper portion includes the web and upper parts of the legs, while the second lower portion includes the lower parts of the legs with pole shoes. This segmentation allows only the worn second lower portion to be replaced, reducing the mass of replaceable parts while maintaining braking force generation through the pole shoes on the rail-contacting ends.
2Strength
If the end members have one-piece legs extending up to the upper section of the magnet coil body, then the structural integrity is maintained, but the operating costs increase due to extensive wear on the braking components requiring frequent replacement of entire assemblies
Solution Approach 1:
The end piece is segmented into a first upper portion (web and upper legs) that remains structurally integrated with the magnet coil body, and a second lower portion (lower legs with pole shoes) that can be separately replaced. This allows the structural integrity of the upper portion to be maintained while reducing operating costs by replacing only the worn second lower portion rather than the entire end piece assembly.
3Power
If the magnet coil body has a complex power supply system, then the magnetic flux can be maintained, but the device complexity increases
Solution Approach 1:
The electrical connection device is integrated directly into the end piece structure, merging the power supply function with the mechanical end piece. The first upper portion of the end piece includes an electrical connection device that receives power supply cables and conducts current to the magnet coil winding, eliminating the need for separate complex power supply systems while maintaining the required magnetic flux.
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 reduces operating costs by minimizing the mass of replaceable parts and enabling a straightforward power supply, enhancing the efficiency and adaptability of the rail brake device while maintaining effective braking performance.
Implementation Method 1
The direct current flowing in the magnet coil causes a magnetic voltage that generates a magnetic flux in the magnet core, which is short-circuited via the rail head as soon as the brake magnet rests with its pole shoes on the rail. This creates a magnetic attraction between the brake magnet and the rail.
Implementation Method 2
This creates a braking force due to the sliding friction between the brake magnet and the rail in connection with the magnetic attraction.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a link magnetic rail brake device of a rail vehicle, comprising at least one brake magnet made of a link magnet (2), having at least the following features: the link magnet (2) has a magnetic coil element (8), at least one magnetic core (7), and two end links (14, 15) which are rigidly connected to the magnetic coil element (8); each end link (14, 15) has an end link magnetic core (7); the magnetic coil element (8) has at least one upper chord (30) and a lower chord (32) which form a through-opening (13) between each other; the end link magnetic core (7) is designed in the shape of a horseshoe when viewed on a plane arranged perpendicularly to the longitudinal direction of the magnetic coil element (8), comprising a connecting piece (17) and two limbs (19a, 19b) extending away from the connecting piece (17), wherein pole shoes (16a, 16b) are provided on the limb (19a, 19b) ends facing a rail (1) in order to frictionally contact the rail (1); and the connecting piece (17) extends transversely through the through-opening (13) of the magnetic coil element (8). According to the invention, the end link magnetic core (7) has a single-piece end link magnetic core upper part (20) which comprises at least the connecting piece (17) and at least one first limb (19a, 19b) upper part (21a, 21b) in the assembled position and on which a respective second lower and separate limb (19a, 19b) part (23a, 23b) in the assembled position is releasably secured, the pole shoe (16a, 16b) of the limb (19a, 19b) being formed on the free end of said part.