Drive Shaft Water-Cooling Insert for Core Drilling Heat Control
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Solution Overview
Problem
Core drilling machines experience excessive heat generation leading to reduced performance and risk of damage or injury due to overheating, as existing water supply systems are inefficient in cooling the drill bits and drive shafts.
Innovation Solution
A drive shaft with a cavity along its axis of rotation, featuring an insert device with curved guide elements that direct water flow in two directions, enhancing heat absorption and sealing to efficiently cool both the drill bit and the machine tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water is supplied only for flushing the drill bit, then drilling performance is maintained, but heat generation in the drive shaft causes overheating and potential damage
Solution Approach 1:
The water supply system is designed to perform multiple functions: it flushes the drill bit with drilling mud and simultaneously cools the drive shaft. The cavity in the drive shaft allows water to flow through and absorb heat, transforming a single-function system into a multi-functional one that addresses both flushing and cooling needs
Solution Approach 2:
The cavity in the drive shaft acts as an intermediary structure that enables heat transfer from the drive shaft to the water. The water flows through the cavity, absorbing heat generated during drilling operations, thereby serving as a thermal mediator between the heat source (drive shaft) and the cooling medium
2Temperature
If water flow path is extended through curved guide elements, then heat absorption is improved, but device complexity increases
Solution Approach 1:
The water guide elements are designed with curved geometries instead of straight paths. This curvature extends the water flow path length within the drive shaft cavity, allowing water to remain in contact with the heated surfaces longer and absorb more heat, while the curved design also promotes better sealing between components
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 effectively cools the drive shaft and core drilling device, preventing overheating, damage, and user injuries by optimizing water flow and sealing within the drive shaft, thereby improving machine efficiency and safety.
Implementation Method 1
the water for cooling the drive shaft is guided first in a first direction and then in a second direction... higher heat absorption by the water and thus better cooling can be generated
Data Source
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AI summary
Drive shaft (6) for a machine tool (1), for example a core drilling machine, connectable to a drilling tool (2), in particular a drill bit, containing a cavity (11) extending substantially over the entire length of the drive shaft (6) and along the axis of rotation (M), wherein the cavity (11) contains at least one inflow opening through which water (W) can be fed along the drive shaft into the drilling tool, characterized in that an insert device (14) is provided in the cavity (11) and through which, to cool the drive shaft (6), the water (W) is guided first in a first direction (A) and then in a second direction (B), wherein the insert device (14) contains a first curved guide element (13) and a second curved guide element (15) for separating the water (W) which is guided in the first direction (A) from the water (W) which is guided in the second direction (B), and wherein the cross-sectional area (Q1) of the first curved guide element (13) is designed point-symmetrically about a centre longitudinal axis (M) to the cross-sectional area (Q2) of the second curved guide element (15).