Spindle Drum Cooling Channel Segmentation for Thermal Displacement
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Solution Overview
Problem
Existing multi-spindle lathes face challenges in uniformly cooling the spindle drum to minimize thermal displacements and optimize heat dissipation from spindle motors.
Innovation Solution
The implementation of a cooling channel system with multiple parallel sub-channel systems that discharge liquid cooling medium into an annular space around the spindle drum, allowing for adjustable cooling capacity across different heat input areas, with sub-channel systems arranged to optimize cooling efficiency and minimize radial expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a cooling channel system is implemented in the spindle drum, then heat dissipation from spindle motors is improved, but uniform cooling across different sections is difficult to achieve
Solution Approach 1:
The cooling channel system is divided into multiple independent sub-channel systems, each responsible for cooling a specific section of the spindle drum. This segmentation allows each sub-channel to be optimized for its local heat dissipation requirements, achieving uniform cooling across the entire spindle drum while maintaining effective heat removal from all spindle motors.
Solution Approach 2:
Each sub-channel system is designed with locally adapted cooling capacity to match the heat input of its corresponding spindle motor section. The cooling channels are configured with varying dimensions, lengths, or flow rates to provide appropriate cooling intensity for each specific location, ensuring optimal temperature control throughout the spindle drum.
2Loss of energy
If sub-channel systems are arranged to enclose the spindle motor mount, then cooling coverage is improved, but radial expansion of the spindle drum increases
Solution Approach 1:
Instead of expanding the cooling channels radially outward from the spindle motor mount, the sub-channel systems are arranged axially along the spindle drum. This dimensional change allows the cooling channels to enclose and cool the motor mounts effectively while maintaining a compact radial profile of the spindle drum.
Solution Approach 2:
The cooling channels are nested within the existing structural walls and webbing of the spindle drum. The sub-channel systems are integrated into the drum's wall structure, utilizing the available space between the outer and inner surfaces of the drum walls, thereby achieving comprehensive cooling coverage without increasing the overall radial dimensions of the spindle drum.
3Loss of energy
If multiple sub-channel systems are arranged in successive areas, then cooling efficiency is improved, but structural complexity increases
Solution Approach 1:
The wall webs of the spindle drum serve dual functions: they provide structural support for the drum and simultaneously act as the walls containing the cooling channels. This multi-functionality reduces the need for additional structural elements, maintaining structural simplicity while enabling efficient cooling through the multiple sub-channel systems arranged in successive areas.
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
This solution provides efficient and uniform cooling of the spindle drum, allowing for specific heat management in different sections, reducing thermal displacements, and optimizing heat dissipation while maintaining a cost-effective and space-saving design.
Implementation Method 1
the liquid cooling medium provides efficient cooling of the spindle drum via the cooling channel system
Implementation Method 2
the sub-channel systems discharge the liquid cooling medium into an annular space for cooling medium that encloses the spindle drum
Implementation Method 3
the flow of cooling medium through the different sub-channel systems can be adjusted by throttle elements
Data Source
Figure 1
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AI summary
A multi-spindle lathe comprising a machine frame (12), a spindle drum (14) arranged in the machine frame (12) and rotatable about a spindle drum axis (16), the spindle drum being at least partially constructed from segments (80) cut from flat material in a stacking direction (82) parallel to the spindle drum axis (16) and extending in stacking planes (88) transversely to the stacking direction (82) with overlapping receiving cutouts (90) and cooling channel cutouts (92, 96, 106), such that the spindle drum (14) has spindle motor mounts (30) for spindle motors (32) and a cooling channel system (120, 130, 180) separated from it by wall webs (98), characterized in that the cooling channel system has several parallel-fed sub-channel systems (120, 130, 180) for a liquid cooling medium, and that the sub-channel systems (120, 130, 180) discharge the liquid cooling medium into an annular space (170) surrounding the spindle drum (14) for cooling medium.