Portable Planing Machine Cooling Duct Suction Effect
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Solution Overview
Problem
Portable planing machines face inefficiencies in cooling their electric drive motors, leading to reduced performance and potential overheating during operation.
Innovation Solution
Incorporating a fan wheel-driven cooling system with angled cooling ducts integrated into the planing shaft, which enhances airflow by creating a suction effect, and a separate chip discharge flow to manage waste materials, improving cooling efficiency and motor performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a fan wheel is used to generate cooling air flow, then the electric drive motor can be cooled, but the cooling effectiveness is insufficient and the structure becomes complex
Solution Approach 1:
The patent combines the cooling air flow generation and chip removal functions into a single fan wheel system. The fan wheel serves dual purposes: generating cooling air flow for the motor and creating suction for chip removal, thereby reducing structural complexity while maintaining effective cooling
Solution Approach 2:
The fan wheel is designed to perform multiple functions simultaneously: it generates cooling air flow, creates suction effect for chip removal, and directs air through cooling ducts. This multi-functionality eliminates the need for separate cooling and chip removal systems
2Temperature
If cooling ducts are integrated into the planing shaft, then cooling effectiveness is improved, but the structural complexity increases
Solution Approach 1:
The cooling ducts are integrated within the hollow planing shaft, nesting the cooling system inside the existing planing shaft structure. This approach improves cooling effectiveness while minimizing additional structural complexity by utilizing the internal space of the planing shaft
3Productivity
If the outflow opening is positioned at greater radial spacing, then suction effect is enhanced, but the duct length increases
Solution Approach 1:
The cooling ducts are arranged at different angles and orientations within the planing shaft, utilizing three-dimensional space efficiently. This angular arrangement enhances the suction effect by positioning outflow openings at greater radial spacing while managing duct length through optimized spatial configuration
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 effectively cools the electric drive motor and enhances chip removal, leading to improved operational efficiency and extended machine lifespan by maintaining optimal temperatures and cleanliness.
Implementation Method 1
the cooling air flow which is generated by the fan wheel is guided through a cooling duct which is integrated into the planing shaft... an effect which assists the flow is achieved, which effect assists the flow-generating effect of the fan wheel. At this location, the greater spacing of the outflow opening in the cooling duct through the planing shaft leads to a suction effect
Implementation Method 2
a fan wheel, via which a cooling air flow is generated which is guided by the housing, in particular along the drive motor
Data Source
AI summary
A portable planing machine has a rotatably mounted planing shaft in a housing. The planing shaft is driven by a drive motor. Furthermore, a fan wheel is configured to generate a cooling airflow. At least one cooling duct is integrated into the planing shaft. An outflow opening of the cooling channel is at a greater radial spacing from the rotational axis than an inflow opening of the cooling duct.