Pneumatic Motor Blade Segmentation for Axle Strength
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Solution Overview
Problem
Conventional pneumatic motors have structural weaknesses due to thin axles that are prone to damage under load, and inefficient air chamber design leading to wasted pressure and limited torque.
Innovation Solution
The design includes an axle with increased blade recesses and blades featuring straight segments and rectangular tabs, allowing for enhanced structural strength and more efficient air chamber utilization, enabling the use of up to twelve blades without compromising axle thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of blades is increased to increase the number of air chambers, then the air chamber volume is reduced and air pressure waste is minimized, but the axle thickness at the axis position becomes thinner and structural strength is reduced
Solution Approach 1:
The blade inner side edge is segmented into a straight segment and a curved segment, with the straight segment positioned at the axis-proximal region and the curved segment at the axis-distal region. This segmentation allows the axle to maintain sufficient thickness at the critical axis position while still accommodating multiple blades for increased air chamber count.
Solution Approach 2:
The blade design applies different geometric characteristics to different regions: a straight inner side edge at the axis-proximal region for structural support, and a curved inner side edge at the axis-distal region for aerodynamic efficiency. This local differentiation resolves the contradiction between structural strength and productivity.
2Loss of energy
If the number of blades is increased to reduce air chamber volume, then air pressure utilization is improved, but the axle becomes thinner and more prone to damage
Solution Approach 1:
The blade inner side edge is divided into straight and curved segments, with the straight segment positioned at the axis-proximal region to maintain axle thickness and reliability, while the curved segment at the axis-distal region optimizes air pressure utilization for reduced energy loss.
Solution Approach 2:
Different regions of the blade are given different geometric properties: straight inner side edge for structural reliability at the axis position, and curved inner side edge for energy efficiency in the air chamber region. This local quality differentiation simultaneously improves reliability and reduces energy loss.
3Productivity
If the axle thickness is reduced to accommodate more blades, then the number of air chambers increases, but the torque capability is limited due to excessive air pressure in large volume chambers
Solution Approach 1:
The blade geometry is segmented with a straight inner side edge and a curved inner side edge in different regions, allowing the axle to maintain sufficient thickness for torque capability while accommodating multiple blades for increased air chamber count and improved productivity.
Solution Approach 2:
The blade design applies straight geometry at the axis-proximal region for structural integrity and torque transmission, while applying curved geometry at the axis-distal region for optimal air pressure utilization, thereby simultaneously improving productivity and maintaining force capability.
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 configuration increases the number of air chambers, reduces air pressure waste, enhances torque, and extends the motor's operational life by distributing load more effectively.
Implementation Method 1
When pressured air is led into the pneumatic motor, the pneumatic motor is rotated to drive a tool to rotate
Implementation Method 2
the blades 70 are pushed by the pressured air to rotate the axle 60
Data Source
AI summary
A pneumatic motor has a housing, an axle, and multiple blades. The axle is rotatably mounted in the housing and has multiple blade recesses. The blades are mounted respectively and moveably in the blade recesses. Each blade has an inner side edge. The inner side edge is mounted in a corresponding one of the blade recesses. The inner side edge of each one of at least half of the multiple blades has a straight segment and a rectangular tab. Each one of the blade recesses which holds the blade having the straight segment and the rectangular tab has a bottom having a straight segment and a tab hole.