Dual Linear-Motor Pendulum Damping for Compact Machine Tools
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Solution Overview
Problem
Existing vibration damping solutions for machines and machine tools are inefficient in reducing unwanted vibrations, leading to reduced productivity, and often require significant installation space and maintenance.
Innovation Solution
A compact device utilizing two linear motors with a pendulum mass and support plate arrangement, where the linear motors actively counteract vibrations, ensuring effective damping with minimal space and maintenance requirements, and incorporating a position detection system for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vibration damping solutions are used, then vibration damping effect is achieved, but installation space requirement increases and maintenance needs increase
Solution Approach 1:
The patent combines multiple functional components into a single integrated device: the pendulum mass serves both as the damping element and the moving component of the linear motor, while the support plate arrangement integrates bearing functions and mounting functions. This merging eliminates the need for separate damping devices and reduces overall installation space.
Solution Approach 2:
The pendulum mass serves multiple functions simultaneously: it acts as the damping mass, the moving component of the linear motor, and the mounted component for secondary parts. The support plate arrangement provides both support and bearing functions. This multi-functionality reduces the number of separate components needed, thereby reducing installation space.
2Reliability
If conventional vibration damping solutions are used, then vibration damping effect is achieved, but maintenance requirements increase
Solution Approach 1:
The linear motor uses permanent magnets to generate magnetic fields without requiring external power supply or complex control systems. The electromagnetic bearing system automatically maintains the pendulum mass in position using magnetic forces, eliminating the need for manual adjustment or maintenance of mechanical bearing components.
Solution Approach 2:
The patent replaces traditional mechanical bearing systems with an electromagnetic bearing system. Instead of using physical contact bearings that require lubrication and maintenance, the system uses magnetic fields to support and position the pendulum mass, eliminating mechanical wear and maintenance requirements.
3Device complexity
If a single linear motor is used, then device complexity is reduced, but damping performance is insufficient
Solution Approach 1:
The damping function is segmented into two independent linear motors that can address different vibration modes and directions. Each linear motor can be optimized for specific vibration characteristics, allowing comprehensive vibration control across multiple axes and frequencies while maintaining manageable system complexity.
4Volume of stationary object
If compact design is pursued, then installation space is reduced, but degrees of freedom for vibration modes are limited
Solution Approach 1:
The pendulum mass is configured to move in multiple spatial dimensions, providing degrees of freedom for different vibration modes. The support plate arrangement allows the pendulum mass to oscillate in various directions, enabling the compact device to dampen vibrations across multiple axes and frequency ranges 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
The device achieves effective vibration damping with reduced installation space and maintenance needs, providing high mechanical stability and increased degrees of freedom for vibration modes, while maintaining a compact design.
Implementation Method 1
a first linear motor primary part LMP1, a pendulum mass PM, which is mounted by means of at least one support plate arrangement 40 in such a way that a relative movement of the pendulum mass PM can be carried out along the first linear motor primary part LMP1, a first linear motor secondary part LMS1, which is fastened to the pendulum mass PM in such a way that the pendulum mass can be actuated by means of the first linear motor primary part LMP1
Implementation Method 2
the pendulum mass can be actuated by means of the first linear motor primary part LMP1 to dampen vibrations of the machine 1
Data Source
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AI summary
The invention relates to a device (D) for damping vibrations of a machine (1), in particular for damping vibrations of a machine tool. In order to achieve an especially compact device (D) that makes it possible to damp vibrations of machines, in particular machine tools, effectively and without maintenance, a device is proposed which has a first linear motor primary part (LMP1), a pendulum mass (PM), which is mounted by means of at least one supporting sheet-metal assembly (40) in such a way that a relative motion of the pendulum mass (PM) along the first linear motor primary part (LMP1) can be performed, a first linear motor secondary part (LMS1), which is fastened to the pendulum mass (PM) in such a way that the pendulum mass can be actuated by means of the first linear motor primary part (LMP1) in order to damp vibrations of the machine, a second linear motor primary part (LMP2), and a second linear motor secondary part (LMS2), which is fastened to the pendulum mass (PM) in such a way that the pendulum mass can be actuated additionally by means of the second linear motor primary part (LMP1) in order to damp vibrations of the machine (1). The invention further relates to a machine tool.