Return Filter Vortex Bubble Removal Hydraulic Oil
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Solution Overview
Problem
Existing hydraulic oil return systems face issues with bubble production during filtration, requiring separate bubble removal devices and inadequate bubble removal within the hydraulic oil tank.
Innovation Solution
A return filter with a vortex forming portion, featuring a spiral blade member, collects bubbles through a vortex mechanism within the outflow portion, allowing effective removal of bubbles from hydraulic oil during filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate bubble removing device is provided outside the hydraulic oil tank, then bubbles can be removed from hydraulic oil, but the device complexity increases
Solution Approach 1:
The bubble removing device is merged with the return filter assembly and installed inside the hydraulic oil tank. The filter case integrates both filtration and bubble removal functions, eliminating the need for a separate external bubble removing device while maintaining bubble removal capability
Solution Approach 2:
The return filter assembly performs multiple functions: filtering hydraulic oil through the filter element and removing bubbles through the vortex forming portion. This multi-functional design consolidates what would traditionally require separate devices into a single integrated unit
2Reliability
If hydraulic oil passes through a return filter, then oil is filtered, but bubbles are produced in the hydraulic oil
Solution Approach 1:
The vortex forming portion utilizes the flowing hydraulic oil to generate a vortex that naturally separates and removes bubbles. The harmful bubbles produced during filtration are converted into a beneficial separation process through centrifugal force, where bubbles rise to the center of the vortex and are discharged through the air discharge port
Solution Approach 2:
The vortex forming portion acts as an intermediary mechanism between the filter element and the hydraulic oil tank. It receives filtered oil containing bubbles, processes them through vortex formation, and discharges both cleaned oil and separated bubbles, mediating the transition from filtered to bubble-free hydraulic oil
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 vortex forming portion effectively collects and removes bubbles from hydraulic oil, preventing air from being suctioned into pumps and reducing the risk of bubble bursting within the hydraulic circuit, which can cause temperature and pressure fluctuations leading to part damage.
Implementation Method 1
the vortex forming portion that includes a blade member having a spiral shape is provided in the outflow portion that has a substantially cylindrical shape and communicates with the hollow portion of the filter element. This configuration allows the hydraulic oil flowing through the outflow portion to produce a vortex.
Implementation Method 2
A lower end of the outflow pipe may be covered by a lower end surface having a substantially truncated cone shape that increases in height and decreases in width toward a center, and a side surface of the outflow pipe in a vicinity of the lower end surface may include a plurality of holes. This configuration causes a flow of the hydraulic oil to change to a direction substantially orthogonal to the axis
Data Source
AI summary
A return filter is provided in a tank, for removing bubbles from hydraulic oil before returning the hydraulic oil to the tank. A vortex forming portion that includes a spiral-shaped blade member is provided in an outflow portion that has a substantially cylindrical shape and communicates with a hollow portion of a filter element. Thus, a vortex forms in the hydraulic oil flowing through the outflow portion and bubbles contained in the hydraulic oil are collected.