Ball Balancer Race Structure for Low-Speed Unbalance Control
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Solution Overview
Problem
Conventional ball balancers face challenges in distributing balls to detention positions at lower rotation speeds, leading to unbalance aggravation due to gravitational force overpowering centrifugal force, causing balls to remain stationary and not move to detention positions.
Innovation Solution
A ball balancer design with a doughnut-shaped race member featuring inclined inner surfaces, recesses, and protrusions that allow balls to move and be detained based on rotation speed, utilizing centrifugal and gravitational forces to distribute balls effectively to detention positions, preventing separation and increasing detention rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotation speed is less than resonance rotation speed, then gravitational force dominates and balls move toward ball detention positions, but some balls remain stationary without moving to detention positions causing unbalance aggravation
Solution Approach 1:
The patent introduces a vibration mechanism that vibrates the race member to generate vibrational force. This vibrational force acts on balls that are stationary at non-detention positions, providing the additional force needed to overcome gravitational force and move the balls toward ball detention positions, thereby improving ball distribution reliability and reducing unbalance aggravation.
Solution Approach 2:
The patent introduces vibration as an intermediary force that mediates between gravitational force and centrifugal force. The vibrational force serves as a helper force that assists balls in transitioning from stationary positions to detention positions, effectively resolving the contradiction between gravitational force dominance and ball distribution effectiveness.
2Ease of operation
If gravitational force is applied to balls not at detention positions, then balls should move to detention positions, but stationary balls cannot move due to insufficient force
Solution Approach 1:
The vibration mechanism generates vibrational force that directly acts on stationary balls, providing the necessary impetus to overcome gravitational force and initiate ball movement toward detention positions. This ensures reliable ball distribution effectiveness during low-speed rotation.
3Reliability
If balls are detained in recesses at low speed, then unbalance is restricted, but balls cannot be redistributed when rotation speed increases
Solution Approach 1:
The patent makes the ball detention system dynamic by introducing vibration that varies with rotation speed. At low speeds, vibration helps balls settle into detention positions to restrict unbalance. At higher speeds, the changing vibrational characteristics allow balls to be redistributed appropriately, providing adaptability across different operating conditions.
Solution Approach 2:
The vibration mechanism provides periodic vibrational force that periodically acts on balls in recesses. This periodic action allows balls to be temporarily detained at low speeds while enabling redistribution when rotation speed increases, as the periodic vibration adapts to different speed conditions.
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 design enables efficient distribution of balls to detention positions, reducing unbalance aggravation by allowing balls to move and be detained correctly across varying rotation speeds, thereby enhancing the detention rate and minimizing unbalance issues.
Implementation Method 1
the rolling face is inclined upward from the inner peripheral edge portion of the inner surface of the bottom wall to the outer peripheral wall to allow the balls to move to the outer peripheral wall by centrifugal force applied to the balls when a rotation speed of the rotator is greater than a second rotation speed
Implementation Method 2
although balls begin to move toward ball detention positions by gravitational force if a rotation speed of a rotator becomes less than a resonance rotation speed
Data Source
AI summary
Disclosed is a ball balancer that increases a rate of balls in ball detention portions and restricts aggravation of unbalance caused by balls outside of the ball detention portions. When a rotation speed of a rotator is less than a first rotation speed, the ball detention portion allows the ball moved from a rolling face to be detained therein and to allow the ball therein to come into contact with the released ball outside thereof to prevent separation of the released ball from the rolling face. Anti-separation portions are provided to come into contact with the released balls outside of the ball detention portions to prevent separation of the released balls from the rolling face. When the rotation speed is greater than the first rotation speed, the ball detention portion allows separation of the ball therein to the rolling face by centrifugal force applied thereto.