Liquid circulation device for machine tool and tank
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Solution Overview
Problem
In liquid circulation devices for machine tools, metal scrap deposition on heat exchangers reduces heat exchange efficiency, and temperature instability occurs due to uneven cooling and heating, as the heat exchanger is often not designed to prevent deposition or ensure uniform temperature distribution.
Innovation Solution
A liquid circulation device with a tank featuring a two-layer structure and a throttle portion with a reduced cross-sectional area, where the heat exchanger is strategically positioned within the throttle portion to enhance flow rate and prevent metal scrap deposition, ensuring uniform temperature adjustment across the liquid and tank.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heat exchanger is disposed in the liquid without any ingenuity, then the liquid temperature can be adjusted, but the metal scarp in the liquid is deposited on the heat exchanger to lower heat exchange efficiency
Solution Approach 1:
The patent applies local quality by creating a throttle portion with reduced cross-sectional area at a specific location in the tank, where the heat exchanger is disposed. This localized structural change causes liquid to flow at higher speed through this region, preventing metal scarp deposition on the heat exchanger while maintaining temperature adjustment functionality throughout the entire tank.
2Quantity of substance
If the heat exchanger is disposed in a tank having a large capacity for storing the liquid, then the liquid can be stored, but a liquid that is cooled down around the heat exchanger and a liquid of a high temperature away from the heat exchanger are generated and thus the temperature of the liquid sent to the machine tool is not stable
Solution Approach 1:
The patent utilizes hydraulic principles by designing a throttle portion that restricts liquid flow cross-section, causing the liquid to flow at higher velocity through the region where the heat exchanger is disposed. This enhanced flow dynamics ensures uniform heat exchange throughout the liquid in the large-capacity tank, stabilizing the temperature of the liquid sent to the machine tool while maintaining large storage capacity.
3Productivity
If the cross-sectional area of the liquid passage is reduced at the throttle portion, then the liquid flow rate increases to prevent scarp deposition, but the liquid passage area is reduced
Solution Approach 1:
The patent applies local quality by reducing the cross-sectional area only at the specific throttle portion where the heat exchanger is disposed, rather than reducing the entire liquid passage area. This localized restriction creates high-velocity flow precisely where needed to prevent metal scarp deposition on the heat exchanger, while maintaining adequate passage area elsewhere in the tank for sufficient liquid storage capacity.
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 suppresses metal scrap deposition on the heat exchanger and achieves uniform temperature adjustment of the liquid, improving heat exchange efficiency and stability in supplying cooled or heated liquid to machine tools.
Implementation Method 1
a heat exchanger disposed in the tank... adjusts the temperature of the liquid by disposing the heat exchanger in the liquid to be circulated
Implementation Method 2
the tank has a throttle portion in which a cross-sectional area of a liquid passage between the introduction portion and the lead-out portion is reduced... at least a portion of the heat exchanger is disposed in the throttle portion
Data Source
Figure 1
Figure 2
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AI summary
Provided are a liquid circulation device capable of suppressing a deposition of a metal scarp in a liquid on a heat exchanger (23) and uniformly adjusting a temperature of the liquid and a tank. The liquid circulation device (1) for a machine tool includes a tank (21) that has an introduction portion and a lead-out portion (25A, 25B) of a liquid and stores a liquid circulated between the liquid circulation device and the machine tool, and a heat exchanger (23) that is disposed in the tank. The tank (21) has a throttle portion (211h) in which a cross-sectional area of a passage is reduced in the middle of a liquid passage between the introduction portion and the lead-out portion (25A, 25B), and at least a portion of the heat exchanger (23) is disposed in the throttle portion (211h).