Dynamic Balance Tester with Centered Vertical Spring Support
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Solution Overview
Problem
Conventional dynamic balance testing devices suffer from reduced measurement sensitivity due to the vertical spring attachment being offset from the center of gravity of the rotating body, leading to increased displacement of the base and diminished sensitivity differences in imbalance measurements.
Innovation Solution
A dynamic balance testing device with a vibrating unit supported by a vertical spring and three orthogonal springs, aligning the center of gravity of the rotating body with the vertical spring attachment point, allowing for precise measurement of imbalances on both sides of the rotating body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vertical spring is attached to the base at a position largely deviated from the projection of the center of gravity of the rotating body, then the base is stably supported, but the measurement sensitivity of the dynamic balance testing device degrades
Solution Approach 1:
The patent applies asymmetry by deliberately positioning the vertical spring attachment point away from the center of gravity projection, creating an asymmetric support configuration that generates a moment arm. This asymmetric arrangement causes the base to rotate in response to imbalance forces, thereby converting linear displacement into rotational motion that enhances measurement sensitivity while maintaining stable support through the combined action of vertical and horizontal springs.
Solution Approach 2:
The patent transitions from a one-dimensional linear displacement measurement to a two-dimensional rotational response by positioning the vertical spring offset from the center of gravity. This dimensional change allows the system to detect imbalance forces through rotational motion of the base, thereby improving measurement sensitivity while maintaining stability through the multi-directional spring support system.
2Device complexity
If the vertical spring attachment position is offset from the center of gravity projection, then the base structure is simplified, but the displacement difference between upper and lower sides of the base decreases
Solution Approach 1:
The asymmetric positioning of the vertical spring creates a moment arm that amplifies the displacement difference between the upper and lower sides of the base. This asymmetric configuration, combined with the horizontal springs, generates a rotational response that increases the measurable displacement difference, thereby improving measurement precision while maintaining a relatively simple base structure.
Solution Approach 2:
The patent employs dynamic principles by allowing the base to rotate freely about the vertical spring attachment point. This dynamic rotational response, driven by the offset spring configuration, transforms static support into a dynamic measurement system that automatically amplifies displacement differences in response to imbalance forces, enhancing measurement precision without complicating the base structure.
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
Enhances measurement sensitivity by increasing the difference in displacement values between the upper and lower sides of the vibrating unit, enabling accurate imbalance detection regardless of the imbalance location.
Implementation Method 1
a first spring configured to elastically support the vibrating unit and restrict displacement of the vibrating unit in a direction parallel to a rotation axis
Implementation Method 2
at least three second springs configured to elastically support the vibrating unit and restrict displacement of the vibrating unit in a predetermined direction orthogonal to the rotation axis
Data Source
AI summary
A dynamic balance testing device includes a vibrating unit configured to rotatably hold a predetermined rotating body being a specimen, a first spring configured to elastically support the vibrating unit and restrict displacement of the vibrating unit in a direction parallel to a rotation axis of the predetermined rotating body, and at least three second springs configured to elastically support the vibrating unit and restrict displacement of the vibrating unit in a predetermined direction orthogonal to the rotation axis. The at least three second springs are attached to the vibrating unit on a same predetermined plane, and the vibrating unit holds the predetermined rotating body such that a projection of a center of gravity of the predetermined rotating body onto the predetermined plane is substantially at the same position as a position where the first spring is attached to the vibrating unit.