Decoupling Mechanism for Large-Displacement Vibration Testing
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Solution Overview
Problem
Conventional electrodynamic vibration tables are limited to a maximum displacement of 100 mm, restricting the development and exploration of large-displacement vibration testing technologies, as they cannot meet the increasing demands for higher displacement tests.
Innovation Solution
A decoupling mechanism comprising a first transfer decoupling assembly, a rotary amplifying assembly, and a second transfer decoupling assembly, which amplifies the force received from a vibration exciter and transfers it to a sliding table assembly, enabling large-displacement vibration testing by connecting the first transfer decoupling assembly to the vibration exciter and the second transfer decoupling assembly to the sliding table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a conventional electrodynamic vibration table is used, then the structure is simple and easy to operate, but the maximum displacement is limited to 100 mm
Solution Approach 1:
The vibration transmission system is divided into three independent modules: a first transfer decoupling assembly connected to the vibration exciter, a rotary amplifying assembly in the middle, and a second transfer decoupling assembly connected to the sliding table. This segmentation allows each module to perform a specific function, enabling displacement amplification while maintaining operational simplicity through modular design
Solution Approach 2:
The rotary amplifying assembly acts as an intermediary between the vibration exciter and the sliding table. It receives vibration from the first transfer decoupling assembly, amplifies the displacement through rotational motion conversion, and transmits the amplified vibration to the second transfer decoupling assembly, thereby achieving large-displacement vibration without requiring a fundamentally new exciter design
2Length of moving object
If the internal structure and guidance of the table are maintained as conventional, then the device complexity remains low, but the displacement cannot exceed 100 mm
Solution Approach 1:
The system dynamically converts linear vibration from the vibration exciter into rotational motion through the first transfer decoupling assembly, then uses the rotary amplifying assembly to amplify the displacement through rotational expansion, and finally converts the rotational motion back to linear vibration through the second transfer decoupling assembly. This dynamic transformation enables the system to achieve large-displacement vibration tests while maintaining the conventional simple structure of the vibration table itself
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 decoupling mechanism allows for the realization of large-displacement vibration of the sliding table assembly, overcoming the limitations of conventional vibration tables and enhancing the capabilities of vibration testing technologies.
Implementation Method 1
a rotary amplifying assembly (3), wherein the rotary amplifying assembly (3) is connected to the first transfer shaft (11) by means of the first transfer main body (12)... the rotary amplifying assembly (3) and the second transfer decoupling assembly (2) are connected by means of the second transfer main body (22)
Data Source
AI summary
A decoupling mechanism (01) for large-displacement vibration tests includes a first transfer decoupling assembly (1), a rotary amplifying assembly (3) and a second transfer decoupling assembly (2), wherein the first transfer decoupling assembly (1) includes a first transfer shaft (11) and a first transfer main body (12) axially connected to the first transfer shaft (11); the second transfer decoupling assembly (2) includes a second transfer shaft (21) and a second transfer main body (22) axially connected to the second transfer shaft (21); an extension direction of the axis of the first transfer shaft (11) is the same as that of the axis of the second transfer shaft (21); a first connecting shaft (15) is arranged between the rotary amplifying assembly (3) and the first transfer main body (12), and a second connecting shaft (25) is arranged between the rotary amplifying assembly (3) and the second transfer main body (22); and extension directions of the axis of the first connecting shaft (15) and the axis of the second connecting shaft (25) are the same and are perpendicular to that of the axis of the first transfer shaft (11) or the second transfer shaft (21). A vibration testing apparatus prepared by combining the decoupling mechanism (01) with a vibration exciter (02) and a sliding table assembly (03) realizes large-displacement vibration of the sliding table assembly.