Measuring Device for Hydraulic Oil Impurity Detection Under High Pressure
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Solution Overview
Problem
Existing impurity particle measuring devices using glass tubes are prone to cracking under high pressure, leading to measurement errors due to the pressure resistance limitations of optically transparent materials.
Innovation Solution
A measuring device with a housing containing a flow path hole and two cavities, each with a transparent, substantially cylindrical cell, where light is emitted orthogonally to the flow path to accurately measure impurity particles in hydraulic oil, with a tapered shape and flat surfaces to stabilize flow and prevent swirls, and sealing members to secure the cells and improve accuracy under high pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a glass tube is used as the pipe for measuring impurity particles, then optical transparency is improved, but pressure resistance deteriorates
Solution Approach 1:
The device divides the optical path into two separate transparent windows positioned on opposite sides of the flow path hole, rather than using a single glass tube. Each window is independently mounted in the housing, allowing the flow path to pass through the housing body rather than through a pressure-resistant glass tube. This segmentation enables the use of transparent materials for optical purposes while the housing structure provides pressure resistance.
Solution Approach 2:
The housing acts as an intermediary structure that separates the optical function (performed by transparent windows) from the pressure containment function (performed by the housing body). The transparent windows serve as intermediaries for light transmission, while the housing provides the pressure-resistant enclosure, eliminating the need for a single component to fulfill both functions simultaneously.
2Stability of the object's composition
If the flow path hole has a tapered shape, then flow stability is improved, but manufacturing complexity increases
Solution Approach 1:
The tapered shape is applied locally only to the linking portions that connect the flow path hole to the cavities, rather than to the entire flow path. The measurement section maintains a uniform cylindrical shape for accurate particle detection, while only the transition zones incorporate tapering to guide flow smoothly. This localized application of tapering achieves flow stabilization without unnecessarily complicating the manufacturing of the critical measurement section.
3Measurement precision
If sealing members are added to secure the cells, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The sealing function is merged with the mounting structure by integrating sealing members into the cell attachment mechanism. The transparent windows are secured to the housing with sealing members that prevent leakage at the interface between the windows and housing, combining the sealing function with the structural mounting function rather than adding separate sealing 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 device effectively measures impurity particles in hydraulic oil with high accuracy even under high pressure, reducing measurement errors and preventing swirls, while maintaining structural integrity and stability.
Implementation Method 1
a light emitting section configured to irradiate a hydraulic oil flowing in the flow path hole with light via the first cell in a direction substantially orthogonal to the center axis; and a light receiving section disposed facing the light irradiating section across the first cell, the flow path hole, and the second cell
Data Source
AI summary
A measuring device can be used under high pressure and can measure impurity particles contained in a hydraulic oil with high accuracy. A flow path hole opening on two facing surfaces of a housing has flat side surfaces. A cavity opens on the side surface, and a cavity opens on the side surface. Light emitted from a light irradiating section irradiates a hydraulic oil flowing in the flow path hole, via a cell disposed in the cavity in a direction substantially orthogonal to a center axis. Light passing through the hydraulic oil is received by a light receiving section via a cell disposed in the cavity opening on the side surface.