Magnetic Dual-Shaft Vacuum Pump Motor for Vibration-Free Synchronization
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Solution Overview
Problem
Existing electric motors with two shafts face challenges in synchronizing the rotation of the shafts, leading to rotational vibrations and potential collisions of displacement elements, especially at high speeds.
Innovation Solution
The implementation of at least one adjusting magnet device on each shaft generates a counter-torque through magnetic interaction, compensating for the magnetic tension between rotor magnet devices and maintaining synchronization without wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical coupling (toothed gear) is used to synchronize the two shafts, then synchronization is achieved, but wear, operating noise, and power consumption increase
Solution Approach 1:
The patent replaces the mechanical toothed gear coupling with a magnetic coupling system. Two rotor magnet devices on parallel shafts interact magnetically to synchronize rotation without mechanical contact. This eliminates wear, noise, and power consumption associated with mechanical friction while maintaining synchronization reliability through magnetic field interaction between the rotor magnets.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the two shafts. The rotor magnet devices generate magnetic fields that interact across a small air gap, serving as a non-contact mediator to transmit rotational synchronization. This magnetic intermediary replaces direct mechanical contact, eliminating harmful friction-based effects while achieving the desired synchronization.
2Object-generated harmful factors
If purely electronic control is used to synchronize the shafts, then wear is avoided, but control complexity and sensor requirements increase
Solution Approach 1:
The patent implements a self-synchronizing system where the two rotor magnet devices automatically synchronize through their mutual magnetic interaction. The magnetic coupling creates a self-regulating mechanism that maintains synchronization without external electronic control signals or sensors. The system serves itself by using the inherent magnetic field interaction to detect and correct any desynchronization, eliminating the need for complex electronic control infrastructure.
3Productivity
If the stator field is active, then the shafts are driven, but the shafts are offset by an angle of rotation due to magnetic tension
Solution Approach 1:
The patent introduces adjustable magnet devices that can dynamically modify their magnetic field strength and orientation during operation. This dynamic adjustability allows the system to compensate for the angle offset caused by magnetic tension from the stator field. By varying the magnetic parameters of the adjustable magnets, the system maintains accurate synchronization while the shafts rotate under stator field drive, resolving the conflict between productivity and synchronization accuracy.
Solution Approach 2:
The patent changes the magnetic field parameters (strength, orientation, distribution) of the adjustable magnet devices to counteract the adverse effects of the stator field's magnetic tension. By modifying these parameters, the system eliminates the angle offset between shafts while maintaining rotational drive, achieving both high productivity and precise synchronization accuracy simultaneously.
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 effectively dampens rotational vibrations and ensures stable synchronization of the shafts, preventing wear and maintaining efficient operation even at high speeds.
Implementation Method 1
at least one adjusting magnet device on each shaft generates a counter-torque through magnetic interaction
Implementation Method 2
both shafts are arranged in a common stator field. Here, the stator field acts simultaneously on two rotor magnet devices
Data Source
AI summary
An electric motor, in particular for a vacuum pump, with two magnetically coupled shafts. A correction force can be set on each shaft by means of adjusting magnet devices, whereby negative effects due to errors in the magnetic coupling can be compensated.