Oil Filter Reservoir Baffle for Cold Viscosity
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Solution Overview
Problem
Hydraulic filters in hydraulic systems face challenges during cold temperature operations, including increased viscosity of hydraulic fluid, pressure buildup, and noise issues due to air bubbles, which existing bypass valves fail to adequately address.
Innovation Solution
An oil filter reservoir with a permeable wall and a spring-loaded bypass valve that allows oil to bypass the filter, combined with a baffle that separates the outlet chamber into a reserve and bypass chamber, facilitating oil flow and reducing pressure buildup, especially under cold conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a standard filter is used in cold temperature conditions, then the filter structure remains simple, but the hydraulic fluid viscosity increases causing increased resistance to flow and pump noise
Solution Approach 1:
The reservoir is segmented into multiple chambers (inlet chamber, outlet chamber, bypass chamber, reserve chamber) separated by baffles. This segmentation allows different zones to serve different functions: the bypass chamber handles high-pressure cold fluid while the reserve chamber maintains normal filtration, resolving the contradiction between simple structure and operational ease in cold conditions.
Solution Approach 2:
A baffle structure acts as an intermediary element between the filter and the outlet, creating a bypass chamber that mediates the flow of cold, viscous fluid. The baffle with its specific opening configuration directs cold fluid away from the filter while maintaining normal operation, reducing flow resistance without complicating the filter itself.
2Reliability
If existing bypass valves are used, then some pressure relief is achieved, but they cause increased noise at low temperature operation and fail to adequately address viscosity issues
Solution Approach 1:
The harmful function of existing bypass valves (noise generation) is extracted and eliminated. Instead of using a traditional bypass valve that creates noise, the invention uses a passive baffle structure with controlled openings that directs flow without the mechanical components that generate noise, while still achieving pressure relief functionality.
Solution Approach 2:
The solution moves from a one-dimensional valve opening/closing mechanism to a three-dimensional chambered structure with multiple baffles and openings. This dimensional change creates a more effective pressure relief system that also addresses fluid direction and viscosity management, reducing noise while improving reliability.
3Ease of manufacture
If the filter is designed for normal temperature operation, then manufacturing is simple, but cold temperature operation causes pressure buildup and pump strain
Solution Approach 1:
The baffle structure is pre-configured with specific opening patterns and chamber volumes designed to anticipate cold temperature conditions. Before cold fluid enters the system, the bypass chamber is already positioned to receive and redirect viscous fluid, preventing pressure buildup and reducing pump strain without requiring complex active control systems.
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 reduces noise and improves hydraulic pump performance by allowing oil to bypass the filter and directing viscous oil towards the outlet, minimizing circulation and aiding in quicker warming of the fluid, thus enhancing hydraulic system efficiency at low temperatures.
Implementation Method 1
The bypass valve allows a portion of the oil to bypass the permeable wall to release the increased oil pressure and volume in the inlet chamber
Implementation Method 2
The filter includes a permeable wall and a spring loaded bypass valve
Implementation Method 3
The baffle is present in the outlet chamber, spaced apart from the bypass valve, and includes openings to permit a limited oil flow through the baffle
Implementation Method 4
The filter divides the reservoir housing into an oil inlet chamber and an oil outlet chamber... The filter includes a permeable wall
Data Source
AI summary
An oil filter reservoir includes a reservoir housing having a filter, which divides the housing into an oil inlet chamber and an oil outlet chamber. A housing inlet and a housing outlet circulate oil in and out of the reservoir housing. The filter includes a permeable wall and a bypass valve, which releases the increased oil pressure and volume in the inlet chamber during cold temperature operation. A baffle in the outlet chamber is spaced apart from the bypass valve and permits limited oil flow through the baffle. The baffle separates the outlet chamber into a reserve chamber and a bypass chamber.