Screw Device Cooling Nozzle Using Coanda Effect for Leakage-Free Gas Cooling
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Solution Overview
Problem
Existing screw device and motion guide device cooling systems face challenges in processing cooling passages and preventing coolant or cooling water leakage, leading to inefficiencies in cooling efficiency, particularly with air-cooled systems which have lower cooling efficiency compared to liquid cooling.
Innovation Solution
A cooling nozzle design that surrounds the screw shaft or guide rail, featuring an internal passage for gas introduction, a deflection surface to bend the gas flow, and a guide path to draw in external gas, utilizing the Coanda effect to amplify the gas flow for effective cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If liquid cooling systems are used for screw devices and motion guide devices, then cooling efficiency is improved, but processing difficulty and leakage prevention complexity increase
Solution Approach 1:
The patent replaces the liquid cooling system with a gas cooling system. The gas cooling nozzle introduces gas through an internal passage, creates a low pressure region via the Coanda effect at the deflection surface, and draws in external gas through a guide path to form amplified gas flow for cooling. This substitution eliminates the need for complex liquid cooling passages and seal mechanisms while maintaining effective cooling capability.
2Temperature
If liquid cooling systems are used for screw devices and motion guide devices, then cooling efficiency is improved, but device complexity increases due to seal mechanisms
Solution Approach 1:
The patent replaces the liquid cooling system with a gas cooling system. The gas cooling nozzle introduces gas through an internal passage, creates a low pressure region via the Coanda effect at the deflection surface, and draws in external gas through a guide path to form amplified gas flow for cooling. This substitution eliminates the need for complex liquid cooling passages and seal mechanisms while maintaining effective cooling capability.
3Reliability
If air cooling is used instead of liquid cooling, then leakage issues are resolved, but cooling efficiency decreases
Solution Approach 1:
The patent utilizes pneumatic principles by introducing gas through an internal passage and leveraging the Coanda effect at the deflection surface to create a low pressure region. This draws in external gas through a guide path, amplifying the gas flow to achieve effective cooling without the leakage problems associated with liquid cooling systems.
Solution Approach 2:
The patent changes the physical parameters of the cooling system by using gas instead of liquid and by amplifying the gas flow through the Coanda effect and guide path mechanism. This parameter change enables the system to achieve cooling efficiency comparable to liquid cooling while maintaining the reliability advantages of gas cooling.
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 amplified gas flow effectively cools the screw device and motion guide device, achieving comparable cooling efficiency to liquid cooling while preventing leakage, thus addressing the inefficiencies of air-cooled systems.
Implementation Method 1
a deflection surface, provided adjacent to the opening, for bending the gas flow released from the opening; and a guide path for drawing in gas outside the cooling nozzle
Data Source
AI summary
Provided is a screw device nozzle that can gas-cool a screw device effectively. A screw device cooling nozzle (4) of the present invention is placed in such a manner as to surround at least one of a screw shaft (1) and a nut (2). The cooling nozzle (4) includes an internal passage (8) into which gas is introduced, an opening (7) for releasing the gas flow introduced into the internal passage (8), a deflection surface (27), provided adjacent to the opening (7), for bending the gas flow released from the opening (7), and a guide path (10) for drawing in gas outside the cooling nozzle (4).