Rotatable Piston Shaft Pneumatic Vibration for Deep-Hole Drilling
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Solution Overview
Problem
Existing vibration devices for drilling long and deep holes face challenges in achieving a compact structure while providing effective rotation and vibration, often resulting in large sizes and high mechanical friction.
Innovation Solution
A pneumatic vibration device with a rotatable piston shaft, comprising a piston body with a hollow spindle and connected pistons, and a gas diverter that alternately supplies gas to the pistons to create vibration, while an input shaft drives rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a piezoelectric ultrasonic vibrator is disposed on a rotary shaft to realize rotation and vibration, then the vibration effect is improved, but the structure size becomes excessively large
Solution Approach 1:
The patent replaces the piezoelectric ultrasonic vibrator with a pneumatic vibration generation mechanism. A piston connected to the rotary shaft through a connecting rod receives periodic pneumatic pressure to generate vibrations. This pneumatic approach achieves the required vibration effect while allowing for a more compact structure compared to the piezoelectric alternative.
Solution Approach 2:
The patent substitutes the piezoelectric mechanical system with a pneumatic-mechanical system. Instead of using piezoelectric ceramics that require large sizes for effective vibration, the invention uses compressed air acting on a piston to generate the same vibrational effect, resulting in a more space-efficient design.
2Adaptability or versatility
If an eccentric shaft and lever ring are used to realize vibration of a rotating shaft, then the vibration function is achieved, but mechanical friction increases and wear occurs
Solution Approach 1:
The patent eliminates the eccentric shaft and lever ring mechanical vibration mechanism by introducing a pneumatic system. Compressed air is supplied periodically to a piston, which transfers motion to the rotary shaft through a connecting rod. This pneumatic approach generates the required vibration function while avoiding the mechanical contact and friction inherent in eccentric shaft mechanisms.
Solution Approach 2:
The patent extracts and removes the eccentric shaft and lever ring components that cause mechanical friction and wear. By replacing this mechanical vibration generation approach with a pneumatic system, the harmful friction and wear are eliminated while the vibration function is preserved.
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 device allows for controlled vibration frequency and impact force, enabling efficient cutting and improved surface quality of deep holes, while being compact and adaptable for various applications.
Implementation Method 1
a gas diverter; wherein the first piston cavity and the second piston cavity are communicated with the first gas hole and the second gas hole respectively
Implementation Method 2
two ends of the spindle are connected to a first piston and a second piston through connection bearings respectively
Data Source
AI summary
A pneumatic vibration device with a rotatable piston shaft comprises a piston body and a gas diverter. The piston body comprises a piston shaft, an input shaft and a piston cylinder body. The piston shaft comprises a hollow spindle with two ends connected to a first piston and a second piston through connection bearings respectively. The first piston and the second piston are connected through an inner sleeve. The spindle is connected to a rotary connection member. The input shaft stretches into the inner sleeve and is matched and connected with the rotary connection member. The gas diverter comprises a first gas diversion port and a second diversion port. The pneumatic vibration device is compact in structure and high in adaptability, and can realize rotation and vibration of drilling tools.