Pneumatic Tool Motor Side Cover Airflow Structure for Vane Wear
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Solution Overview
Problem
Existing pneumatic tool motors face issues with wear on vanes due to high-speed rotation and reduced airtightness, leading to decreased efficiency and shortened service life.
Innovation Solution
The design incorporates airflow-guiding structures with gas accumulation grooves and ports on the side and rear covers to enhance air pressure distribution, reducing contact between vanes and the chamber wall, thereby maintaining airtightness and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high pressure air is introduced to drive the rotor at maximum force, then the output power of the rotor is enhanced, but the wear on the vanes increases and airtightness deteriorates
Solution Approach 1:
The air inlet structure is segmented into multiple components: inlet passage, air guiding holes, and gas accumulation grooves. This segmentation allows high pressure air to be introduced in a controlled manner through multiple pathways, distributing the air flow to reduce concentrated impact on vanes while maintaining sufficient driving force for the rotor.
Solution Approach 2:
Gas accumulation grooves are designed to accumulate high pressure air before it reaches the vanes. This preliminary accumulation allows the air to be stored and then released in a controlled manner, reducing the direct impact force on the vanes while still providing sufficient pressure to drive the rotor effectively.
2Productivity
If the diameters of air guiding hole outlets are increased to fill more air into the cylinder chamber, then the rotor can be driven with higher torque, but the air pressure distribution becomes uncontrolled causing increased vane wear
Solution Approach 1:
Gas accumulation grooves act as an intermediary between the air guiding holes and the cylinder chamber. These grooves receive high pressure air from the air guiding holes and then distribute it to the cylinder chamber in a controlled manner, mediating the pressure transmission to prevent direct high-velocity impact on the vanes while still providing sufficient torque.
Solution Approach 2:
The gas accumulation grooves are strategically positioned at specific locations where air pressure needs to be regulated. By creating localized accumulation zones, the system achieves different pressure characteristics in different regions, allowing high torque generation while protecting vulnerable vane areas from excessive pressure and wear.
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 enhances airtightness and reduces rotational loss, resulting in improved durability and efficiency of the pneumatic tool motor.
Implementation Method 1
two first gas accumulation grooves (12, 14) associated with the two front inlet guiding grooves (16, 18) respectively and aligned with the two inlet passages (41, 43)
Data Source
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AI summary
A pneumatic tool motor (10) comprises a cylinder (2), a side cover (10) disposed on a front end of the cylinder (2), and a rear cover (60) disposed on a rear end of the cylinder (2). The side cover (10) includes two first gas accumulation grooves (12) and two second gas accumulation grooves (14). Each of the first and second gas accumulation grooves (12, 14) includes a gas accumulation portion (121, 141) aligned with an associated discharge passage (43) or inlet passage (41) and a gas guiding portion (122, 142) shallower than the gas accumulation portion (121, 141) Each of two exhaust ports (64) and two inlet ports (62) of the rear cover (60) includes a gas accumulation portion (641, 621) aligned with an associated discharge passage (43) or inlet passage (41) and a gas guiding portion (642, 622) shallower than the gas accumulation portion (641, 621).