Vibro Hammer Transmission Segmentation for Resonance Control
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Solution Overview
Problem
Existing vibro hammers used for driving and extracting steel formed materials suffer from rapid deformation and unsound structure due to the use of multiple transmission devices with fixed shafts and single-sided ball bearings, leading to vibration inefficiencies and reduced durability.
Innovation Solution
A vibro hammer design featuring a single shaft with ball bearings on both sides and a transmission device that allows 180-degree weight rotation, enabling synchronized operation of upper and lower weight sets to generate vibrations efficiently and maintain balance, thus preventing resonance and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmission devices with fixed shafts and single-sided ball bearings are used, then the vibro hammer can operate, but the transmission device deforms rapidly and has unsound structure
Solution Approach 1:
The transmission device is segmented into an upper transmission device and a lower transmission device, each with independent shafts and ball bearings. This segmentation allows each component to be optimized independently, with the upper shaft supported by a first ball bearing and the lower shaft supported by a second ball bearing, eliminating the structural instability caused by single-sided support in unified designs.
Solution Approach 2:
The transmission device uses a composite structure combining multiple shafts (upper shaft and lower shaft), multiple ball bearings (first and second ball bearings), and weighted elements. This composite design distributes mechanical loads across multiple components, preventing rapid deformation and enhancing overall reliability compared to single-component transmission systems.
2Reliability
If weights are fixed in position, then the transmission device structure is simple, but vibrations cannot be generated effectively
Solution Approach 1:
The transmission device incorporates dynamic weight positioning through the upper and lower weighted elements that can rotate relative to the shafts. The upper weight and lower weight are positioned at adjustable angles, allowing the system to generate controlled vibrations when the weights are misaligned and to achieve balance when aligned, providing dynamic control over vibration generation without excessive structural complexity.
3Device complexity
If a single shaft with one-sided ball bearing is used, then the device complexity is reduced, but the shaft fails rapidly and deforms easily
Solution Approach 1:
The single shaft is segmented into an upper shaft and a lower shaft, each supported by its own ball bearing (first ball bearing for upper shaft, second ball bearing for lower shaft). This segmentation provides dual support points that distribute radial and axial loads, preventing the rapid failure and deformation associated with single-sided ball bearing support while maintaining relatively simple device architecture.
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 solution enhances the durability and vibration efficiency of the vibro hammer by ensuring balanced operation and reduced risk of deformation, allowing for effective driving and extraction of steel profiles and pipes without resonance, thereby extending the device's lifespan and improving performance.
Implementation Method 1
at least one first ball bearing (16), whose inner ring is mounted to the stepped shaft (12) and whose outer ring is arranged on the transmission body (6), and which, thereby, enables the stepped shaft (12) to rotate within the transmission body (6)
Implementation Method 2
variable moment vibratory driver hydraulically shifts the phase of two sets of eccentric weights via a transmission device
Implementation Method 3
These weights generate vibrations of different intensities at different directions during rotation
Data Source
Figure 1
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AI summary
The present invention relates to a vibro hammer; which is mounted on parts such as steel formed pipes and profiles and used in driving and extracting these parts to and from the soil, and is able to rotate without resonance; and which, by means of the transmission device whose main parts are the stepped shaft, toothed piston and transmission body, performs phase change between the upper weight set and lower weight set with fewer parts.