Oil Mist Filter Collar Venting to Block Downstream Oil Spray
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Solution Overview
Problem
Existing oil mist filters allow oil sprays to scatter and be sent downstream when blow-by gas passes through, causing inefficiencies in oil separation and contamination in processing-target gas.
Innovation Solution
An oil mist filter design with a collar portion on the first end plate that projects outward beyond the filter body's edge, catching any oil sprays and preventing them from passing through ventholes, ensuring high mist capture efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter body is used to capture oil mist from blow-by gas, then oil separation is achieved, but oil sprays scatter from the filter body and are sent to downstream
Solution Approach 1:
The end plate with collar portion acts as an intermediary component between the filter body and the downstream gas flow path. It intercepts and captures oil sprays that escape from the filter body, preventing them from reaching downstream while allowing processed gas to pass through freely.
Solution Approach 2:
The harmful function of oil spray generation is extracted and isolated from the main gas flow path by positioning the collar portion at the periphery of the end plate. The collar captures oil sprays in a separate zone, removing them from the downstream gas stream without interfering with the primary filtration function.
2Reliability
If the filter body captures oil mist, then processing-target gas is purified, but oil accumulates at the bottom and the filter body becomes immersed in oil
Solution Approach 1:
The internal space is segmented into distinct functional zones: an upper gas flow path for purified gas passage and a lower oil accumulation zone. The end plate with collar creates a physical separation that allows oil to collect at the bottom without interfering with the filter body's operation in the upper zone.
Solution Approach 2:
The end plate structure serves as an intermediary barrier that prevents direct contact between the filter body and accumulated oil. The collar portion extends to intercept oil sprays before they can reach the filter body, maintaining operational stability even when oil accumulates in the housing.
3Quantity of substance
If blow-by gas passes through the filter body, then oil mist is captured, but air bubbles form in oil and oil sprays scatter when bubbles blow out
Solution Approach 1:
The collar portion of the end plate performs preliminary interception of oil sprays at the source, preventing them from entering the gas flow path where they could be re-aerosolized by air bubbles. This preliminary action stops the harmful effect before it can propagate through the system.
Solution Approach 2:
The collar structure acts as an intermediary barrier between the oil accumulation zone and the gas flow path. It captures oil sprays that form when air bubbles exit the oil, preventing secondary spray generation in the downstream gas stream.
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 design effectively prevents oil sprays from entering the downstream gas flow, maintaining high separation efficiency and reducing oil contamination in the processing-target gas.
Implementation Method 1
the filter body (47) captures an oil mist
Data Source
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AI summary
An object of the present invention is to prevent sprayed oil from being sent to downstream. An oil mist filter 10 includes : a filter body 11 having a tubular shape, the filter body 11 causing processing-target gas supplied to a hollow in the filter body 11 to pass through an outer peripheral surface to capture oil mist contained in the processing-target gas; and an end plate 12 disposed at one end surface of the filter body 11, the end plate 12 projecting outward beyond an outer peripheral edge of the one end surface of the filter body 11. A plurality of ventholes 12d are formed at a portion of the end plate 12 projecting beyond the outer peripheral edge of the one end surface of the filter body 11. The processing-target gas blown out from the outer peripheral surface of the filter body passes through the ventholes 12d.