Electromagnetic Brake Magnetic Shielding for Shaft Protection
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Solution Overview
Problem
Conventional electromagnetic brake structures suffer from magnetic interference, which damages parts like bearings, reduces service life, and attracts iron dust, leading to reduced operational efficiency and shortened lifespan due to improper magnetic attraction distribution.
Innovation Solution
The design incorporates a silicon steel ring with slots and elongate grooves, isolation holders, and a notch for a second steel ring, allowing the magnetic field to focus on the friction piece, minimizing interference with the transmitting shaft and other parts, while maintaining strong magnetic attraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If an electromagnetic coil is used to generate magnetic attraction to press the friction piece, then the brake effect is achieved, but the transmitting shaft and other parts are damaged by magnetism, reducing service life
Solution Approach 1:
The patent extracts the harmful magnetic field from the transmitting shaft area by using a magnetic shield (silicon steel ring) that redirects magnetic lines to act only on the friction piece. The shield is positioned between the electromagnetic coil and the transmitting shaft, removing the harmful magnetic influence while preserving the useful magnetic attraction on the friction piece.
Solution Approach 2:
The silicon steel ring acts as an intermediary element that mediates the magnetic field distribution. It receives the magnetic field from the electromagnetic coil and redirects it toward the friction piece, preventing direct magnetic interaction with the transmitting shaft while maintaining the brake function.
2Productivity
If the electromagnetic coil generates magnetic field, then brake function is achieved, but iron dusts are attracted to the transmitting shaft affecting service life
Solution Approach 1:
The magnetic shield removes the harmful magnetic field from the transmitting shaft region, preventing iron dust attraction. By redirecting magnetic flux through the shield to act only on the friction piece, the patent eliminates the condition that causes iron dust to be attracted to the transmitting shaft, while maintaining brake functionality.
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 configuration prevents iron dust attachment, prolongs the service life of components, and enhances the magnetic effect on the friction piece, ensuring smooth operation and extended lifespan by isolating magnetic interference from the transmitting shaft and other parts.
Implementation Method 1
the electromagnetic coil includes a first silicon steel ring, a plurality of slots arranged around a peripheral side of the first silicon steel ring
Implementation Method 2
when the electromagnetic coil 74 is conducted power, a magnetism generates to attract a friction piece 75 magnetically
Implementation Method 3
the electromagnetic coil includes a first silicon steel ring, a plurality of slots arranged around a peripheral side of the first silicon steel ring, a number of elongate grooves radially extending along an outer side of the first silicon steel ring
Implementation Method 4
a coil seat including a plurality of receiving holes disposed on a front end thereof to receive a number of compression springs respectively
Implementation Method 5
the electromagnetic coil generates a magnetic field to attract the friction piece, thereby the magnetic lines generated from the electromagnetic coil are acted on the friction piece to obtain high magnetic effect
Data Source
AI summary
An electromagnetic brake contains a coil seat including plural receiving holes disposed on a front end thereof to receive plural compression springs respectively and an electromagnetic coil mounted on the front end thereof; a movable friction piece fitted on the front end thereof; a brake member fixed in a front end of the friction piece and including a transmitting shaft fitted thereon; a fixed member secured on a front end of the brake member, wherein the electromagnetic coil includes a first silicon steel ring, a plurality of slots and a number of elongate grooves, and each slot includes an isolation holder fitted therein, and the isolation holder includes a recess formed on one side thereof to correspond to the groove of the first silicon steel ring, and between two abutting isolation holders is provided with a coil set formed by an enameled copper wire.