Depth Vibrator Adjustable Imbalance via Reversible Drive
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Solution Overview
Problem
Existing depth vibrators with non-adjustable eccentrics have limited flexibility in responding to varying soil properties during operation, leading to mechanical failures due to high loads from vibrations.
Innovation Solution
A depth vibrator design featuring a rotary drive that can rotate in two directions, with a primary and secondary mass body, allowing the center of gravity to change positions relative to the rotary axis, enabling adjustable imbalance and amplitude adjustment by reversing the rotation direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanical adjustment mechanism is used to change the imbalance mass, then the adaptability to different soil properties is improved, but the reliability decreases due to high loads causing mechanical part failure
Solution Approach 1:
The patent replaces the mechanical adjustment mechanism with an electrical control system. The rotary drive unit can be controlled to rotate in two opposite directions, allowing the secondary mass body to occupy different rotation positions (first or second position) relative to the primary mass body. This electrical control system substitutes the mechanical adjustment mechanism, eliminating mechanical parts subject to high loads while maintaining adaptability to different soil properties through directional control.
2Adaptability or versatility
If the imbalance mass is fixed during assembly, then the device complexity is reduced, but the adaptability to varying soil properties during operation is limited
Solution Approach 1:
The patent implements a dynamic imbalance adjustment system where the secondary mass body can change its position relative to the primary mass body during operation. The rotary drive unit enables the secondary mass body to occupy either a first rotation position (bringing centers of gravity closer) or a second rotation position (spacing centers of gravity apart) by rotating in opposite directions. This dynamic configuration allows the imbalance mass to be adjusted during operation without complex mechanical adjustment mechanisms, achieving adaptability through simple directional control.
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 design provides a robust and long-lasting solution for soil compaction, allowing for significant variability in vibration amplitude, potentially doubling it depending on the mass and shape of the secondary mass body, and reduces mechanical stress by simplifying the adjustment mechanism.
Implementation Method 1
the depth vibrator for compacting a soil with a first imbalance weight and a fastening element for the exchangeable mounting of a second imbalance weight. The first imbalance weight and the second imbalance weight can be driven in a rotating manner about the longitudinal axis of the depth vibrator
Implementation Method 2
The rotating imbalance generates vibrations, with which the depth vibrator compacts the soil and possible additional material
Implementation Method 3
By changing the magnitude of the imbalance mass, the effective impact force during the sinking and/or extraction is changed
Data Source
AI summary
A depth vibrator for compacting soil, comprising a rotary drive (3); a drive shaft (4), which is rotatingly drivable about a rotary axis (A) by the rotary drive (3) in a first rotation direction (R1) and in an opposite second rotation direction (R2); a primary mass body (5) connected non-rotatably to the drive shaft (4) and rotates together with the latter about the rotary axis (A); a secondary mass body (6), which is movable into a first rotation position (P1) relative to the primary mass body (5) by rotation of the drive shaft (4) in the first rotation direction (R1) and which is movable into a second rotation position (P2) by rotation of the drive shaft (4) in the second rotation direction (R2). In the first and second rotation position (P1) the secondary mass body (6) can be rotated together with the primary mass body (5) about the rotary axis (A); and the center of mass (S6) of the secondary mass body (6) and the center of mass (S5) of the primary mass body (5) have different radial distances from the rotary axis (A).