Hydraulic Oil Filter Layout With Air Discharge for Auxiliary Pumps
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Solution Overview
Problem
The existing hydraulic oil suction and filtering arrangements in work vehicles suffer from air accumulation in the auxiliary pump assembly, leading to noise issues and malfunctions due to discontinuous operation, which is not effectively addressed by prior solutions.
Innovation Solution
The hydraulic oil suction and filtering arrangement incorporates an air discharge means with a conduit system that directs air accumulation into a dedicated space, allowing pumps to suck out the air, thereby preventing its entry into the auxiliary pump assembly, utilizing a syphon-like mechanism within the filter module to ensure continuous operation and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If auxiliary pump assembly operates discontinuously, then energy consumption is reduced, but air accumulates in conduits causing noise and malfunctions
Solution Approach 1:
An air discharge conduit is introduced as an intermediary component between the filter and auxiliary pump assembly. This conduit provides a dedicated pathway for air to escape from the system, preventing air accumulation that would otherwise cause noise and malfunctions during discontinuous pump operation.
Solution Approach 2:
The hydraulic system is segmented into separate air handling and oil flow paths. The air discharge conduit creates a distinct channel for air removal independent of the main hydraulic circuit, allowing air to be discharged separately while maintaining continuous oil flow to the auxiliary pump when needed.
2Reliability
If air discharge means is added to prevent air accumulation, then auxiliary pump reliability is improved, but device complexity increases
Solution Approach 1:
The air discharge conduit is merged with the existing filter assembly structure. The conduit integrates with the filter housing and utilizes existing components, combining the air discharge function with the filtration system rather than adding a completely separate air management subsystem.
Solution Approach 2:
The air discharge system operates passively using pressure differentials and gravity. Air naturally accumulates in the highest point of the conduit and is discharged automatically when the auxiliary pump creates sufficient suction, eliminating the need for additional valves, pumps, or control mechanisms.
3Object-generated harmful factors
If air is allowed to accumulate in dedicated space, then air can be discharged by pumps, but oil quality may deteriorate due to air mixing
Solution Approach 1:
Air is extracted from the hydraulic oil stream at the filter location where it naturally accumulates. The air discharge conduit taps into the oil flow at the filter and creates a separate exit path for air, removing it from the system before it can mix with and deteriorate the oil quality downstream.
Solution Approach 2:
Air removal is performed preliminarily at the filter stage before oil enters the hydraulic circuits. By discharging air at the highest point in the system where it accumulates first, the air is removed before it can contaminate the oil that will be used in the hydraulic circuits, preventing quality deterioration.
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 air accumulation in the auxiliary pump assembly, ensuring better oil quality and reducing noise, allowing for a simplified and more compact pump layout, and potentially eliminating the need for a charge pump, thus enhancing operational efficiency and economy.
Implementation Method 1
utilizing a syphon-like mechanism within the filter module to ensure continuous operation and reduce noise
Data Source
Figure 1
Figure 2
AI summary
Suction and filtering hydraulic arrangement (1) for feeding hydraulic pumps assemblies (2, 3) of a work vehicle, comprising at least an auxiliary pump assembly (2) and at least one hydraulic circuit pump (3), both pumps (2, 3) comprising an inlet fluidly connected to a source (4) of oil and a filter module (5) fluidly interposed between each of said pumps (2, 3) and said source (4), this latter being an oil transmission tank of the work vehicle, wherein the arrangement (1) comprises air discharge means (13) configured to accumulate air from filter module (5) and to allow the suction of such air from the at least one pump (3).