Hydraulic Return-Line Jet Pump for Oil Deaeration in Loading Vehicles
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Solution Overview
Problem
Existing oil deaeration systems for hydraulic circuits in loading vehicles and tractors are costly and require significant installation space, failing to efficiently remove air and gas from hydraulic fluid, leading to cavitation, noise, and reduced component lifespan.
Innovation Solution
A jet pump is integrated into the return line between the hydraulic motor arrangement and storage, using vacuum pressure to deaerate hydraulic fluid, comprising a motive nozzle, mixing chamber, and diffuser, with the motive medium branched off from the pressurized portion of the hydraulic system, and an inclined outlet tube with orifices for efficient air bubble segregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a suction device is used to deaerate hydraulic fluid, then air and gas are removed from hydraulic fluid, but the construction becomes costly and installation space increases
Solution Approach 1:
The suction device is integrated directly into the return line between the hydraulic motor arrangement and hydraulic fluid storage, merging the deaeration function with the existing hydraulic circuit rather than being a separate component. This reduces installation space and simplifies construction while maintaining deaeration efficiency
Solution Approach 2:
The system uses the hydraulic fluid's own pressure to drive the jet pump, eliminating the need for external power sources or additional complex mechanisms. The hydraulic fluid circulates through the jet pump which creates vacuum pressure to deaerate itself, making the system self-sufficient and reducing overall complexity
2Productivity
If hydraulic fluid flows back to the sump at excessive velocity, then hydraulic system operates, but air mixing and foaming occur
Solution Approach 1:
The jet pump is positioned in the return line to create a vacuum that draws hydraulic fluid into the hydraulic fluid storage before it can flow back at excessive velocity. This preliminary action prevents the high-velocity flow that causes atomization and air mixing, eliminating foaming before it occurs
Solution Approach 2:
The jet pump acts as an intermediary device between the hydraulic motor arrangement and the hydraulic fluid storage. It mediates the flow of hydraulic fluid by creating a controlled suction that prevents direct high-velocity discharge into the storage, thereby preventing air entrainment and foaming
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 provides a space-saving, efficient oil suction system that is independent of rotational direction, effectively separates air bubbles, and can be used in various agricultural machines, enhancing hydraulic system performance and extending component life.
Implementation Method 1
the suction device guides hydraulic fluid out of the hydraulic motor arrangement into the hydraulic fluid storage by means of vacuum pressure (Δp)
Implementation Method 2
the suction device is constructed as a jet pump and is integrated in the return line between the hydraulic motor arrangement and hydraulic fluid storage
Data Source
AI summary
A device for the deaeration of a hydraulic fluid of a hydraulic system has at least one hydraulic motor arrangement and a hydraulic fluid storage which is hydraulically coupled with this hydraulic motor arrangement. A suction device for sucking out the hydraulic fluid is associated with the at least one hydraulic motor arrangement such that the suction device guides hydraulic fluid out of the hydraulic motor arrangement into the hydraulic fluid storage by means of vacuum pressure (Δp). The suction device is constructed as a jet pump and is integrated in the return line between the hydraulic motor arrangement and hydraulic fluid storage.