D-Shaped Strainer Reducing Hydraulic Oil Blow-Back
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing strainers mounted to oil supply ports in hydraulic oil tanks experience hydraulic oil blow-back during oil supply due to contact with the strainer, which can lead to unreliable liquid surface height confirmation.
Innovation Solution
A strainer design with a bottomed tubular shape and a rod system where the rod is guided along a longitudinal direction, featuring a D-shaped side surface with a notched and curved portion, and a conical bottom surface that prevents oil from passing through, reducing blow-back and allowing accurate liquid surface height confirmation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional strainer is mounted to an oil supply port, then the liquid surface height can be confirmed, but hydraulic oil blow-back occurs during oil supply
Solution Approach 1:
The strainer body is designed with an asymmetric D-shaped cross-section instead of a conventional circular shape. This asymmetric geometry creates a specific flow pattern where the oil jet is directed along the curved surface portion, preventing direct contact with the strainer body and eliminating blow-back while maintaining liquid surface height visibility
Solution Approach 2:
The invention introduces a vertical dimension to the strainer design by creating a three-dimensional D-shape with a notched portion and curved surface portion. This dimensional change allows the oil flow to follow the curved surface in a specific trajectory, directing it away from the strainer body and preventing blow-back
2Adaptability or versatility
If the strainer body is made cylindrical for unrestricted installation, then installation flexibility is improved, but liquid blow-back cannot be prevented
Solution Approach 1:
The strainer body uses a D-shaped asymmetric cross-section that maintains rotational adaptability for unrestricted installation while the specific asymmetric geometry of the notched portion and curved surface portion prevents blow-back by directing oil flow away from the strainer body
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 strainer effectively reduces liquid blow-back and allows for stable and accurate confirmation of the liquid surface height within the tank, while maintaining a cylindrical shape for unrestricted installation.
Implementation Method 1
a float 22 is provided on a distal end on the bottom surface side of the rod. The float, namely, the rod rises and falls as a liquid surface rises and falls.
Implementation Method 2
The side surface includes a net body through which the liquid is passable.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A liquid surface height inside a tank is allowed to be confirmed while blow-back of a liquid is reduced. A strainer body having a substantially bottomed tubular shape has a substantially D shape when viewed in a longitudinal direction. A bottom surface of the strainer body has a shape in which a part of a substantially conical shape is cut away, and a top of the substantially conical shape overlaps with a notched portion notched to form the substantially D shape. The bottom surface protrudes toward an opening of the strainer body. A rod having a substantially rod shape is provided adjacent to the notched portion of the strainer body, and a float is provided on a lower end of the rod.