Multi-Shaft Power Output Layout for Flexible Propulsion Drives
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Solution Overview
Problem
The existing power device for flying bodies, as disclosed in JP-A-2015-137092, has low versatility due to its mechanical drive mechanism and limited arrangement flexibility, which restricts its application and efficiency.
Innovation Solution
A power device with multiple shafts and output units that can be rotated to drive various devices, including generators and electric motors, allowing for enhanced versatility and efficient power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single output unit is used at one end portion of the crankshaft, then the mechanical drive mechanism is simple, but the arrangement flexibility and versatility are limited
Solution Approach 1:
The power device is divided into multiple independent output units (first output unit at one end portion of crankshaft, second output unit at other end portion, and third output unit at intermediate position), allowing each unit to independently drive different driven devices. This segmentation enables flexible arrangement according to the layout of driven devices while maintaining relatively simple mechanical drive mechanisms for each unit.
Solution Approach 2:
The output units are distributed not only at the end portions but also at intermediate positions along the crankshaft in the axial direction, adding spatial dimensionality to the power distribution system. This enables three-dimensional arrangement flexibility to match various driven device layouts.
2Adaptability or versatility
If multiple output units are added to increase arrangement flexibility, then the versatility is improved, but the device complexity increases
Solution Approach 1:
Multiple output units are designed with universal functionality to drive different types of driven devices (generators, electric motors, etc.). Each output unit can be independently configured to serve different purposes, expanding application range without requiring fundamentally different mechanical structures for each function.
Solution Approach 2:
Different output units are strategically positioned at different locations (end portions and intermediate positions) along the crankshaft to match the local requirements of different driven devices. This localized power distribution optimizes the arrangement for specific application scenarios while keeping the overall structure manageable.
3Productivity
If output units are positioned at end portions only, then the mechanical connection is straightforward, but the optimization of power extraction for various driven device layouts is limited
Solution Approach 1:
Output units are pre-positioned at optimal locations (end portions and intermediate positions) along the crankshaft during design, enabling flexible adaptation to different driven device layouts without requiring complex real-time adjustments or optimizations of the mechanical connection paths.
Data Source
AI summary
A power device includes: a plurality of shafts; and a case that rotatably supports the plurality of shafts. At least one of the plurality of shafts has a protruding end portion protruding outward from the case at least at one end portion in an axial direction. An output unit capable of rotationally driving a driven device is at the protruding end portion.