Damping Valve Emergency Operation Using an Integrated Permanent Magnet

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Solution Overview

Problem

Existing damping valve devices require additional components for emergency operation, increasing complexity and installation space, particularly due to the need for mechanical holding devices in case of solenoid coil power failure.

Innovation Solution

Incorporating a permanent magnet within the magnetic flux circuit of the solenoid coil as the emergency operation device, which simplifies the mechanical structure and eliminates the need for moving components, allowing for a more compact design and efficient actuation forces without disturbing the magnetic flux.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a mechanical holding device is used for emergency operation, then the emergency operation function is achieved, but the device complexity and installation space increase

Engineering Contradiction:

Improveemergency operation functionVSAvoidmechanical structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the mechanical holding device with a permanent magnet that generates magnetic force to act on the emergency operation armature. This substitution eliminates the need for complex mechanical holding mechanisms while maintaining the emergency operation function, directly resolving the contradiction between reliability and device complexity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The permanent magnet serves dual functions: it provides the holding force for normal operation and acts as the emergency operation device when power is lost. This multi-functionality eliminates the need for separate emergency operation components, reducing device complexity while maintaining reliability

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If a mechanical holding device is used for emergency operation, then the emergency operation function is achieved, but the installation space increases

Engineering Contradiction:

Improveemergency operation functionVSAvoidinstallation space

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent merges the emergency operation function into the existing solenoid coil structure by incorporating a permanent magnet within the magnetic flux circuit. This integration eliminates the need for separate emergency operation components and reduces installation space while maintaining the emergency operation function

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Force

If a permanent magnet with large cross section is used, then large actuating forces are achieved, but the magnetic flux is disturbed

Engineering Contradiction:

Improveactuating forceVSAvoidmagnetic flux disturbance

Core Design Contradiction:

ForceVSLoss of energy

Solution Approach 1:

The patent optimizes the permanent magnet's cross-sectional dimensions, specifically making the radial width greater than the axial height. This parameter change allows the magnet to generate sufficient actuating force while minimizing disruption to the magnetic flux circuit, resolving the contradiction between force and energy loss

Inventive Principle:

Principle #35Parameter changes

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 provides a simpler, more space-efficient emergency operation mechanism that maintains actuation forces while reducing the need for additional components and minimizing current input, thereby enhancing the damping valve device's performance and reliability.

Implementation Method 1

the permanent magnet is arranged within a magnetic flux circuit of the solenoid coil

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Implementation Method 2

Incorporating a permanent magnet within the magnetic flux circuit of the solenoid coil as the emergency operation device

Methodology Applied

Scientific EffectMagnetism: Magnetism

Data Source

PatentUS20240068542A1Damping valve device having an emergency operation function

Publication Date: 2024.02.29 ZF FRIEDRICHSHAFEN AG

AI summary

Damping valve device, having a pre-stage valve and a main-stage valve. An actuating force on the main-stage valve body is set via the pre-stage valve, which can be adjusted by a solenoid coil. The damping valve device has an emergency operation device, which sets a defined closing force at the pre-stage valve in the event of a failure of the power supply of the damping valve device. The emergency operation device is formed by at least one permanent magnet within a magnetic flux circuit of the solenoid coil.