Dual-Channel Cooling Attachment for Tool-Only Heat Removal
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Solution Overview
Problem
Existing cooling attachments for work machines are inefficient in cooling the tool and work machine, as they primarily conduct coolant from one end to the other, leading to inadequate cooling and unintended cooling of the workpiece.
Innovation Solution
A double-channel cooling system with a connecting hole between the channels, where the coolant is swirled and directed from the tool to the work machine, preventing coolant from reaching the workpiece, utilizing a conical design for efficient heat dissipation and minimizing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single cooling channel conducts coolant from one end to the other, then the structure is simple, but the cooling effect is insufficient and the workpiece is unintentionally cooled
Solution Approach 1:
The single cooling channel is divided into two separate channels: a first cooling channel that conducts coolant from the end close to the work machine to the free end for tool cooling, and a second cooling channel that conducts coolant from the free end back to the end close to the work machine. This segmentation allows independent control of coolant flow paths, improving cooling effectiveness while preventing unintended workpiece cooling.
Solution Approach 2:
The cooling system transitions from a one-dimensional linear flow to a two-dimensional dual-channel system with distinct inlet and outlet paths. The first channel handles coolant supply while the second channel handles coolant return, creating separate thermal management zones that prevent cross-contamination of cooling effects between tool and workpiece.
2Device complexity
If coolant flows directly from the tool to the workpiece, then the cooling attachment structure is simple, but the workpiece is unintentionally cooled which is harmful
Solution Approach 1:
The cooling system separates the coolant flow path into two distinct channels: the first cooling channel delivers coolant to the tool, and the second cooling channel returns coolant to the work machine end without allowing it to reach the workpiece. This segmentation eliminates the harmful unintended cooling effect while maintaining structural feasibility.
Solution Approach 2:
The second cooling channel acts as an intermediary path that intercepts and redirects coolant before it can reach the workpiece. By providing this intermediate return path, the system prevents direct coolant contact with the workpiece, eliminating the harmful cooling effect.
3Device complexity
If the coolant flow is not swirled, then the cooling attachment structure is simple, but the cooling effect on the tool is insufficient
Solution Approach 1:
The connecting hole at the free end of the housing shaft is designed with a conical shape that induces swirling motion in the coolant flow. This curvature-based design transforms the linear coolant flow into a rotational pattern, increasing the cooling effect on the tool through enhanced fluid dynamics and improved heat transfer efficiency.
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
Enhances the cooling effect on the tool, reduces wear, and increases its lifespan while preventing unwanted cooling of the workpiece, providing effective temperature insulation for the work machine and the cooling attachment.
Implementation Method 1
The inner housing is made of a material with relatively good thermal conductivity, which ensures sufficient dissipation of frictional heat from the work region of the work machine
Implementation Method 2
the flow of the coolant in the return line can advantageously be influenced, advantageously swirled, by the flow of the coolant in the supply line
Data Source
AI summary
A cooling attachment can be releasably fastened to a work machine, which has a shaft in which a rod-like tool is guided with a rotary or hammering action and exits the shaft at a free end. The cooling attachment has a housing that encloses the work machine and in particular the shaft thereof and the tool that exits it, the latter only partially. Formed within the housing is a first cooling channel for conducting a coolant from an inlet opening to the tool exiting the free end of the housing shaft. In order to improve the cooling of the tool without cooling the workpiece to be machined, at least one connecting hole is provided, at the free end of the housing shaft, between the first cooling channel and a second cooling channel, in order to divert the coolant from the first cooling channel into the second cooling channel.