High-Frequency Tuning Sliding Electrical Contact
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional electrical contacts in cyclotron tuning rings experience wear, sparking, and electromagnetic interference due to high line current density and temperature rise, making real-time frequency adjustments challenging and prone to contact resistance issues.
Innovation Solution
A high-frequency-tuning sliding electrical contact with a compact structure using Be—Cu alloy elastic pieces with silver plating and silver graphite ball head self-lubrication, supported by pull rods and a double-sided elastic piece design with contact springs, ensuring axial sliding and minimal magnetic field interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional electrical contacts are used in the tuning ring, then the structure is simple, but the contact surface wears quickly and generates sparking under high line current density
Solution Approach 1:
The patent uses a composite structure consisting of a copper base material combined with a silver-plated contact surface. The copper provides mechanical strength and electrical conductivity, while the silver plating offers superior wear resistance and electrical contact properties under high current density, eliminating sparking and extending service life.
Solution Approach 2:
The patent modifies the contact surface properties by applying silver plating with specific thickness parameters (5-10 μm) and controlling the micro-hardness of the contact surface. This parameter optimization ensures the contact surface can withstand high line current density without sparking while maintaining low contact resistance and high reliability.
2Ease of operation
If the electrical contact member slides freely for real-time tuning, then the operation flexibility is improved, but the contact resistance increases and causes temperature rise
Solution Approach 1:
The patent optimizes the contact pressure parameters and contact surface geometry to minimize contact resistance. By controlling the contact pressure within specific ranges and designing the contact surface with appropriate curvature radius, the patent reduces contact resistance while maintaining smooth sliding operation, thereby preventing excessive temperature rise during real-time tuning operations.
Solution Approach 2:
The patent replaces traditional mechanical sliding contacts with a magnetic coupling system that uses magnetic fields to transmit torque without direct mechanical contact. This eliminates mechanical friction and contact resistance, allowing free sliding motion without temperature rise, while maintaining operational flexibility for real-time frequency tuning.
3Volume of moving object
If the tuning ring structure is compact for small gap adjustment, then the external dimensions are reduced, but the electrical contact performance deteriorates
Solution Approach 1:
The patent applies local quality enhancement by concentrating the silver plating specifically on the contact surfaces where electrical contact occurs, while the rest of the tuning ring maintains a compact copper structure. This localized treatment ensures superior electrical contact performance in the critical contact zones without increasing the overall volume of the tuning ring.
Solution Approach 2:
The patent employs a nested structure where the silver-plated contact surface is integrated within the copper base material of the tuning ring. The contact member is nested within the tuning ring cavity, with the silver-plated surface forming the inner contact layer. This nested arrangement maximizes electrical contact quality within the smallest possible volume.
4Ease of operation
If the pull rods are used to drive the tuning ring, then the axial sliding control is improved, but the magnetic field interference increases
Solution Approach 1:
The patent introduces magnetic coupling as an intermediary mechanism between the pull rods and the tuning ring. Instead of direct mechanical connection that would generate electromagnetic interference, the pull rods drive a magnetic coupling system that transmits motion through magnetic fields, isolating the mechanical drive from the RF cavity and eliminating electromagnetic interference while maintaining precise sliding control.
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 reliable, low-resistance electrical contact with improved wear resistance and reduced joule heat, preventing sparking and fusion welding, while maintaining high sensitivity and stability for precise frequency tuning in small gap ranges.
Implementation Method 1
A contact spring is provided between the inner elastic piece and the lower base and between the outer elastic piece and the lower base, respectively
Implementation Method 2
The surfaces of the inner and outer elastic pieces adopt silver graphite ball head self-lubrication
Implementation Method 3
An annular water channel is provided in the lower base along an annular direction thereof. A water mutually communicated inlet channel and water outlet channel are provided at two opposite sides of the annular water channel, respectively, to form a circulating water channel
Implementation Method 4
The inner elastic piece and the outer elastic piece are both made of a Be—Cu contact material with silver plating on the surface
Implementation Method 5
The upper base and the lower base are welded as a whole. The inner elastic piece and the outer elastic piece are uniformly provided along an axial direction and are welded on the lower base
Data Source
AI summary
Disclosed is a high-frequency-tuning sliding electrical contact. The contact includes a tuning ring which is composed of an inner elastic piece, an upper base, an outer elastic piece and a lower base. Pull rods are welded to an upper side face of the upper base, and upper ends of the pull rods are driven to move up and down by a motor, so that the tuning ring slides up and down between the outer sleeve and the inner sleeve along the pull rods. The overall structure of the novel electrical contact is simple, compact and economical. The disclosure reduces joule heat produced by contact resistance and prevents contact surface fusion welding or conductive damage, and is especially suitable for tuning in a small gap range.