Tandem Roller Cooler Layout for Space-Constrained Engine Compartments
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Solution Overview
Problem
Conventional pivot-steered tandem rollers face space constraints in the engine compartment due to increased cooling demands from emissions regulations, leading to reduced water tank volumes and decreased work efficiency.
Innovation Solution
Relocating the cooler from the engine compartment to a machine compartment associated with one of the compaction drums, allowing for a larger cooler size and improved cooling air management, while utilizing the engine compartment space for additional components like exhaust gas aftertreatment systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the cooler is located in the engine compartment, then the cooling air management is simplified, but the available space for the cooler is insufficient and other components must be downsized
Solution Approach 1:
The cooler is relocated from the horizontal plane (engine compartment) to the vertical space above the compaction drums, utilizing the third dimension (vertical height) to resolve the space conflict. This allows the cooler to be positioned in an previously underutilized vertical zone without expanding the machine's footprint.
Solution Approach 2:
The cooler is extracted from the engine compartment and repositioned to a separate location above the compaction drums. This separation resolves the space conflict by removing the cooler from the constrained engine compartment volume while maintaining its cooling function through redesigned air routing.
2Temperature
If the cooler size is increased to meet cooling demands, then the cooling efficiency improves, but the water tank volume must be reduced due to space constraints
Solution Approach 1:
By moving the cooler to the vertical space above the compaction drums, the solution accesses unused vertical volume rather than competing for horizontal space. This enables both the cooler and water tanks to maintain their required volumes without mutual interference.
3Adaptability or versatility
If the cooler is relocated outside the engine compartment, then more space is available in the engine compartment for exhaust gas aftertreatment components, but the cooling air routing becomes more complex
Solution Approach 1:
The cooling air routing system is designed to serve multiple functions: it cools the cooler itself, passes through the engine compartment to cool the drive motor, and exits through the compaction drum region. This multi-functional air path justifies the increased routing complexity by providing comprehensive cooling throughout the machine.
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 arrangement enhances cooling efficiency, reduces the need for frequent water tank refills, and maintains machine efficiency by optimizing installation space and cooling air routing, resulting in environmentally friendly operation.
Implementation Method 1
A fan conveying a flow of cooling air is associated with this cooler, which conveys cooling air through the cooler and thereby achieves cooling of the medium contained in the cooler
Implementation Method 2
A fan conveying a flow of cooling air is associated with this cooler, which conveys cooling air through the cooler
Implementation Method 3
one or both of the compaction drums may additionally be set into vibration during operation via an imbalance exciter
Implementation Method 4
two compaction drums spaced apart in the longitudinal direction of the machine, which are commonly referred to as drums
Data Source
AI summary
A pivot-steered tandem roller for ground compaction, comprising a machine frame with an operator platform, two compaction drums which are spaced apart from one another in the longitudinal direction of the machine and are each steerably mounted on the machine frame via a pivot steering system, a drive motor, a cooler, and a fan associated with the cooler and conveying a cooling air flow, the cooler being arranged vertically above and/or in the longitudinal direction of the machine at the level of one of the compaction drums. Moreover, the invention relates to a method for operating such a pivot-steered tandem roller.