Magnetic Rail Transport in Vacuum Without Lubricants or Wear
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Solution Overview
Problem
Ultra-high vacuum systems face challenges in achieving smooth and long-lasting movement mechanisms without lubricants, as existing solutions require precise manufacturing tolerances and are prone to wear due to sliding friction, especially when contaminants are present.
Innovation Solution
A mechanism using magnetic force to move a rail with spherical bodies, eliminating the need for cutting and notching, and utilizing point contacts to reduce abrasion and maintain cleanliness, allowing for reliable operation without lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cylindrical rollers with guide teeth and raceways are used, then durability and wear resistance are improved, but manufacturing complexity and precision requirements increase significantly
Solution Approach 1:
The patent replaces cylindrical rollers with spherical bodies (balls) that roll between the movable rail and fixed rail. This spherical geometry eliminates the need for complex guide teeth and raceways, significantly simplifying manufacturing while maintaining smooth rolling motion and reducing wear through point contact.
Solution Approach 2:
The patent substitutes the mechanical engagement system (guide teeth and raceways) with a magnetic coupling system. The magnetic unit provides both the driving force and positioning, eliminating the need for mechanical interlocking components and reducing manufacturing complexity.
2Ease of manufacture
If conventional ball bearings are used, then ease of manufacture is improved, but service life is reduced due to sliding friction and wear
Solution Approach 1:
The patent replaces conventional ball bearing assemblies with a magnetic coupling system that eliminates sliding friction. The magnetic unit couples to the movable rail and provides both drive and positioning forces, eliminating the need for complex bearing assemblies with cages and retaining rings.
Solution Approach 2:
The magnetic unit serves multiple functions simultaneously: it provides the driving force, maintains positioning, and eliminates the need for separate bearing components. This multi-functionality simplifies the overall mechanism while improving reliability.
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 achieves significantly longer service life and higher reliability, exceeding prior art by a factor of 100, with minimal wear and contamination resistance, maintaining cleanliness at pressures below 5x10^-13 mbar during operation.
Implementation Method 1
the spherical bodies are designed to enable a, preferably linear, movement of the movable rail relative to the fixed-position rail... As soon as the movable rail is moved by means of the unit, the spherical bodies roll along the stationary rail, thus enabling a linear movement of the movable rail relative to the stationary rail. The forces are designed so that only rolling friction occurs, and sliding friction is avoided.
Implementation Method 2
a unit which is designed to move the movable rail relative to the fixed-position rail by means of magnetic coupling and, after successful movement of the movable rail, to hold it in a fixed position. A rail movable by means of magnetic force enables an externally transmitted drive of this rail, whereby the drive does not require an interface, e.g. in a chamber wall of a vacuum chamber, since the drive can be effected by means of a magnetic coupling.
Data Source
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AI summary
The invention relates to a device for frictionless and lubricant-free movement in vacuum, wherein the device comprises a positionally fixed rail and a rail that can be moved relative thereto by means of magnetic force. The invention further relates to a vacuum chamber, for example for a coating installation comprising a device according to the invention.