Bi-Directional Impact Compactor Drum With Wedge Damping
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Solution Overview
Problem
Conventional impact compactors are limited to uni-directional operation, requiring wide turns and causing strain on the tractor, are unstable on uneven surfaces, ineffective on certain soil types, and inefficient on tightly cemented soils, and lack effective bi-directional operation and soil compaction.
Innovation Solution
A bi-directional impact compactor with non-round drums, a damping arrangement featuring a non-circular channel and resilient wedge formations, and a braking mechanism to stabilize and enable operation in both directions, along with a leveller arrangement for surface compaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional impact compactors are designed for uni-directional operation, then the compaction function is simple and reliable, but the machine requires wide turns, causes severe strain on the tractor, and wastes valuable time (up to 50% of operational time)
Solution Approach 1:
The impact compactor is designed with a bi-directional drum that can effectively compact soil in both forward and reverse directions. The drum geometry is specifically engineered to produce impact blows regardless of rotation direction, eliminating the need for 180-degree turns and allowing continuous compaction operations without time loss for repositioning.
Solution Approach 2:
The drum features an asymmetric profile with salient points and compacting faces arranged to function in both directions. The non-round cross-section with specific geometric features allows the drum to deliver effective impact blows whether rotating clockwise or counter-clockwise, enabling bi-directional operation without requiring separate drums for each direction.
2Stability of the object's composition
If conventional impact compactors use spring connections to eliminate jerk loads, then the connection is flexible, but the traction force varies cyclically causing unacceptably large jerk on the tractor
Solution Approach 1:
The patent replaces the mechanical spring connection with a hydraulic damping arrangement. This hydraulic system provides flexible connection between the impact compactor and tractor while maintaining stable traction force, eliminating the cyclic jerk loads that occur with spring connections during the drum's lifting and dropping cycles.
Solution Approach 2:
The damping arrangement changes the mechanical parameters of the connection system by using hydraulic fluid compression and damping elements to absorb and smooth out force variations. This transforms the connection from a purely mechanical spring system with variable traction force to a hydraulically damped system with stabilized force transmission.
3Force
If conventional impact compactors are designed as large machines, then they have sufficient compaction power, but they require large turning radius wider than the working surface and cannot operate on narrow sites
Solution Approach 1:
The bi-directional drum design allows the compactor to operate effectively in both forward and reverse directions without requiring wide turning radius. This dynamic operational capability enables the machine to work on narrow construction sites and confined spaces where conventional uni-directional compactors cannot maneuver, while maintaining sufficient compaction force through the same drum geometry.
4Adaptability or versatility
If conventional impact compactors operate on uneven surfaces, then they can access various terrains, but they become unstable due to the large turning radius and wide stance requirement
Solution Approach 1:
The bi-directional operation capability allows the compactor to maintain stability on uneven surfaces by eliminating the need for wide turning maneuvers. The machine can operate continuously in both directions without requiring large clearance spaces, reducing lateral movements and improving stability on inclined or uneven terrain where conventional compactors would be unstable.
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
Enables efficient compaction in both forward and reverse directions, stabilizes on uneven surfaces, and effectively compacts various soil types, including tightly cemented soils, reducing operational strain and improving efficiency.
Implementation Method 1
a damping arrangement which is connected between the first and second parts and which is configured to provide a damping function for the relative movement between the first and second parts
Implementation Method 2
at least one wedge formation which is wedged between the shaft member and the tubular member, wherein the wedge formation is at least partially resiliently deformable and is configured to resist/oppose relative rotation between the shaft member and the tubular member
Implementation Method 3
a first part on which at least one non-round compactor drum is rotatably mounted... the compactor drum rises up on each salient point and then falls forwardly and downwardly as it passes over that point, with the result that the following compacting face applies an impact blow to the soil surface
Implementation Method 4
a hydraulic system where a ram was activated in and out of a hydraulic cylinder, to drive fluid into an accumulator of large capacity relative to the amount of fluid displaced by the movement of the ram in and out of the cylinder
Data Source
AI summary
The invention relates to an impact compactor which includes a first part on which at least one non-round compactor drum is rotatably mounted; and a second part which is connected to, and movable relative to, the first part. The impact compactor also includes a damping arrangement which is connected between the first and second parts and which is configured to provide a damping function for the relative movement between the first and second parts. The damping arrangement includes an outer tubular member which defines a non-circular inner channel/passage; a non-circular inner shaft member which defines a first axis of rotation and which is positioned, at least partially, in the channel/passage defined by the outer tubular member; and at least one wedge formation which is wedged between the shaft member and the tubular member. The wedge formation is at least partially resiliently deformable and is configured to resist/oppose relative rotation between the shaft member and the tubular member about the first axis of rotation. One of the members is connected to the first part, while the other member is connected to the second part.