Adjustable Electromagnetic Actuator Spring Preload
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Solution Overview
Problem
Existing electromagnetic actuating devices require significant manufacturing effort to achieve desired response and operating behavior, particularly in valve applications, due to the need for precise manufacturing tolerances and structural changes to accommodate different force-stroke characteristic curves.
Innovation Solution
The electromagnetic actuating device features a shank with a coaxial inner through hole for a tension member that can be adjusted to modify the restoring force, allowing for calibration of the force-stroke characteristic without strict manufacturing tolerances, and includes an adjusting screw device with external and internal threads for efficient spring force adjustment, enabling efficient manufacturing and emergency actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If precise manufacturing tolerances and structural changes are implemented to achieve desired force-stroke characteristic curves, then the response and operating behavior of the actuating device is improved, but the manufacturing effort and complexity increase significantly
Solution Approach 1:
The patent applies parameter changes by enabling adjustment of the spring preload force through a support element that can be positioned axially within the pole core. This allows modification of the restoring force parameter without changing the physical structure or requiring precise manufacturing tolerances. The coil winding parameters can also be adjusted to achieve desired force-stroke characteristic curves, resolving the contradiction between reliable operation and ease of manufacture.
Solution Approach 2:
The invention implements dynamics by making the actuating device adjustable after manufacturing. The support element for the compression spring can be repositioned to change the spring preload, and the coil winding parameters can be modified. This dynamic adjustability allows the same manufactured component to adapt to different operating requirements, eliminating the need for precise manufacturing tolerances for each specific application.
2Reliability
If the actuating device is designed with fixed structural parameters to meet specific force-stroke characteristics, then the operating behavior is optimized, but the adaptability to different customer requirements decreases
Solution Approach 1:
The patent makes the actuating device dynamic and adaptable by providing adjustable parameters. The support element can be repositioned axially to change spring preload, and coil winding parameters can be modified. This allows the same basic structure to be adapted to different customer requirements for force-stroke characteristics without requiring structural changes or new manufacturing processes.
Solution Approach 2:
The invention enables parameter changes by allowing adjustment of the spring preload force through the support element position and by modifying coil winding parameters. This flexibility allows the actuating device to be adapted to different operating requirements while maintaining the same basic structure, thus improving versatility without sacrificing optimized operating behavior.
3Adaptability or versatility
If adjustment devices and support elements are added to enable spring preload modification, then the adaptability and calibration capability are improved, but the device complexity increases
Solution Approach 1:
The support element serves multiple functions: it supports the compression spring, enables adjustment of spring preload by axial positioning, and acts as an adjustment device. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while improving adaptability and calibration capability.
Solution Approach 2:
The support element is positioned within the pole core structure, and the compression spring is positioned on the support element. This nested arrangement integrates the adjustment mechanism within the existing structure rather than adding separate external components, thus minimizing the increase in device complexity while enabling calibration capability.
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 solution allows for efficient manufacturing of actuating devices that can meet various customer requirements with minimal effort, adapting to different operating conditions and eliminating issues related to spring rate and constant variations, while enabling simple calibration and emergency operation.
Implementation Method 1
wherein when the coil winding is energized, a magnetic force acts on the armature, which seeks to move it in the direction of the pole core
Implementation Method 2
a compression spring acting on the armature being provided, which prestresses the magnet armature against a fixed end position
Data Source
AI summary
An electromagnetic actuating device, in particular a proportional magnet or switching magnet, with a magnetic armature (28) which is axially movably guided in a pole tube (8) at least partially surrounded by a coil winding (2), which has a separating area (26) forming a magnetic decoupling and to which a pole core (10) is connected, wherein when the coil winding (2) is energized a magnetic force acts on the armature (28) which seeks to move it against a restoring force (30) acting on it in the direction of the pole core (10), is characterized in that an adjusting device (52) is provided by means of which the effect of the restoring force (30) can be adjusted to a desired setpoint.