Vehicle Oil Cooler Swelling Casing Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional oil coolers for vehicles face issues with cavitation and erosion due to high cooling water flow rates in narrow spacings, leading to decreased heat exchange efficiency and larger size requirements.
Innovation Solution
The design incorporates an outwardly swelling part in the casing's sidewall, increasing the cooling water passage area and reducing flow rates, while maintaining heat exchange efficiency by distributing cooling water passages on opposite sides of the oil passages and forming the swelling part in areas where cavitation occurs, thus preventing erosion and allowing for a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spacing between the outer periphery of the heat exchange core and the inner periphery of the casing is increased, then cavitation and erosion are prevented, but the heat exchange efficiency deteriorates
Solution Approach 1:
The patent applies local quality by creating an outwardly swelling part at specific locations on the casing sidewall where cavitation and erosion occur. This localized structural modification increases the spacing only in those critical areas rather than uniformly throughout the entire casing, thereby preventing cavitation and erosion while maintaining optimal spacing elsewhere to preserve heat exchange efficiency.
2Reliability
If the inner peripheral radius of the casing is increased to prevent cavitation, then cavitation and erosion are prevented, but the oil cooler size increases
Solution Approach 1:
The patent uses local quality by implementing outwardly swelling parts only at specific locations on the casing sidewall where cavitation and erosion problems occur. This localized approach prevents the need to increase the overall inner peripheral radius of the entire casing, thereby preventing cavitation and erosion while maintaining a compact overall oil cooler size.
3Reliability
If the inlet-side oil passage is arranged spaced away from the inner surface of the casing, then cavitation and erosion are prevented, but the distance between inlet-side and outlet-side oil passages is shortened and heat exchange efficiency deteriorates
Solution Approach 1:
The patent applies local quality by forming outwardly swelling parts on the casing sidewall at locations corresponding to where cavitation and erosion occur. This creates localized increased spacing in the cooling water passage at critical areas without requiring a uniform rearrangement of the inlet-side oil passage, thereby preventing cavitation and erosion while maintaining optimal passage spacing to preserve heat exchange 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
This solution effectively prevents cavitation and erosion, maintains heat exchange efficiency, and allows for a smaller oil cooler construction by optimizing the cooling water flow and passage design.
Implementation Method 1
a heat exchange core is housed in a casing such that a cooling water passage is formed around the heat exchange core... the heat exchange core enables oil to be delivered from the inlet-side oil passage to the outlet-side oil passage
Data Source
AI summary
In an oil cooler, a heat exchange core is housed in a casing including a cylindrical sidewall part in a way that a cooling water passage is formed around a heat exchange core. The heat exchange core includes inlet-side and outlet-side oil passages, and enables oil to be delivered from the inlet-side oil passage to the outlet-side oil passage. Inlet and outlet pipes are connected to the sidewall part. The inlet pipe forms a cooling water inlet passage in communication with the cooling water passage. The outlet pipe forms a cooling water outlet passage in communication with the cooling water passage. Outward of the inlet-side oil passage, an outwardly swelling part is formed in the sidewall part of the casing. This arrangement avoids the oil cooler being constructed in a large size and avoids decreasing the heat exchange efficiency of the oil cooler, and also prevents cavitation and erosion from occurring due to the flow of cooling water in an area corresponding to the inlet-side oil passage.