Vacuum Capacitor with Adjustable Electrode and Radial Diaphragm
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Solution Overview
Problem
Conventional vacuum capacitors face issues with dispersion accuracy in electrostatic capacity due to low roundness and production/assembly inaccuracies, leading to increased dispersion, especially in high-capacity scenarios where ±0% dispersion is required, and they lack mechanisms for mechanically adjusting capacity, making them either high-accuracy or requiring selection within specific ranges.
Innovation Solution
The design incorporates an insulating cylinder with a stationary and movable flange, featuring an electrostatic capacity adjusting screw and a corrugated diaphragm that seals between the flanges, allowing for fine adjustment of electrostatic capacity by varying the distance between electrodes, and uses vacuum brazing with jigs to prevent adhesion during assembly, replacing axially extending bellows with a radially extending diaphragm to achieve smaller sizes and reduced dispersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional vacuum capacitors are manufactured without adjustment mechanisms, then production is simpler and faster, but electrostatic capacity dispersion increases due to low roundness and assembly inaccuracies
Solution Approach 1:
The patent introduces an adjustable movable electrode supporting plate that can be positioned at different distances from the stationary electrode supporting plate. This dynamic adjustment capability allows the electrostatic capacity to be precisely tuned after assembly, resolving the contradiction between manufacturing simplicity and capacity accuracy by enabling post-assembly optimization without requiring extremely tight manufacturing tolerances.
Solution Approach 2:
The patent changes the key parameter of electrode distance to control electrostatic capacity. By providing an adjustment mechanism that varies the distance between movable and stationary electrodes, the system can achieve precise capacity values without relying solely on manufacturing precision, thus resolving the contradiction between simple structure and high precision.
2Reliability
If axially extending bellows are used for vacuum sealing, then vacuum sealing is achieved, but the capacitor size increases
Solution Approach 1:
The patent transitions from axial extension (bellows extending in the axial direction) to radial extension (diaphragm extending in the radial direction). This dimensional change allows vacuum sealing to be achieved with a more compact overall structure, reducing the capacitor size while maintaining reliable vacuum sealing through the radially extending diaphragm.
3Manufacturing precision
If electrode plates are manufactured with tight tolerances to reduce dispersion, then electrostatic capacity accuracy improves, but manufacturing cost and complexity increase
Solution Approach 1:
The patent performs the capacity optimization action after assembly rather than requiring it during manufacturing. The adjustment mechanism allows the electrostatic capacity to be fine-tuned after the capacitor is assembled, eliminating the need for tight manufacturing tolerances on individual components and thereby reducing manufacturing difficulty while still achieving low dispersion.
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
This approach allows for precise adjustment and minimization of electrostatic capacity dispersion, enabling the production of small-sized vacuum capacitors with improved voltage proof characteristics and reduced heat generation, while maintaining high conductivity and mechanical strength, thus overcoming the limitations of conventional capacitors.
Implementation Method 1
a diaphragm sealingly connected between the movable-side flange and the movable electrode supporting plate, the diaphragm having corrugation and defining a vacuum side and an atmospheric side in the vacuum capacitor
Implementation Method 2
electrostatic capacity adjusting screw and movable relative to the stationary electrode supporting plate by turning of the electrostatic capacity adjusting screw
Data Source
AI summary
A vacuum capacitor including an insulating cylinder having first and second ends which are opposite to each other. A stationary-side flange is installed to the first end of the insulating cylinder. A stationary electrode supporting plate is installed to an inner surface side of the stationary-side flange. A movable-side flange is installed to the second end of the insulating cylinder. A movable electrode supporting plate is installed to an inner surface side of the movable-side flange through an electrostatic capacity adjusting screw and movable relative to the stationary electrode supporting plate by turning of the electrostatic capacity adjusting screw. Additionally, a diaphragm is sealingly connected between the movable-side flange and the movable electrode supporting plate, the diaphragm having corrugation and defining a vacuum side and an atmospheric side in the vacuum capacitor.