Oil Mist Separator With Injection Hole And Spraying Surface

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Solution Overview

Problem

Existing oil mist separation devices experience reduced performance when the textile or non-woven cloth covering the collision wall absorbs a large amount of oil, leading to decreased efficiency in separating oil mist from blow-by gas.

Innovation Solution

A separator system with a separation chamber that increases the flow velocity of oil-containing gas, featuring injection holes and a spraying surface for condensing oil mist, along with an oil discharge and gas discharge portion to enhance separation efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If textile or non-woven cloth is used to absorb oil mist, then oil mist separation is achieved, but separation performance deteriorates when the textile absorbs a large amount of oil

Engineering Contradiction:
Improveseparation performanceVSAvoidoil absorption capacity
Core Design Contradiction:
ReliabilityVSQuantity of substance

Solution Approach 1:

The invention changes the fundamental parameter of the separation mechanism from absorption (textile-based) to condensation (surface-based). By using a spraying surface that condenses oil mist through controlled cooling or surface tension effects, the system achieves separation performance that does not deteriorate with oil accumulation, as the condensation surface can continuously process oil mist without becoming saturated like absorbent materials.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The invention replaces the mechanical absorption process (textile absorbing oil vapor) with a physical condensation process (oil mist condensing on a spraying surface). This substitution eliminates the limitation of absorbent saturation and enables continuous high-efficiency separation as the condensation surface can be regenerated or is inherently reusable unlike consumable absorbent materials.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If flow velocity is increased in the separation chamber, then oil mist condensation efficiency is improved, but energy consumption increases

Engineering Contradiction:
Improveoil mist separation efficiencyVSAvoidenergy consumption
Core Design Contradiction:
ProductivityVSUse of energy by moving object

Solution Approach 1:

The invention segments the flow path into multiple stages with multiple spraying surfaces. Instead of requiring extremely high flow velocity throughout a single chamber, the system uses several injection holes and spraying surfaces arranged in sequence, allowing the gas to be sprayed multiple times. This segmentation achieves high separation efficiency through cumulative condensation effects while maintaining more moderate flow velocities that reduce energy consumption.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention transitions from a single-stage separation approach to a multi-stage approach by adding the dimension of sequential spraying surfaces. The gas flow is directed through multiple injection holes onto multiple spraying surfaces in succession, effectively multiplying the separation opportunity without proportionally increasing the energy required for each individual spraying stage.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

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 system effectively enhances the separation performance of oil mist from blow-by gas by maintaining efficiency even when the separator absorbs a significant amount of oil, promoting continuous and efficient oil mist removal.

Implementation Method 1

an injection hole configured to inject the oil-containing gas while increasing a flow velocity thereof compared with a flow velocity in a gas channel

Methodology Applied
Scientific EffectFlow velocity increase:

Implementation Method 2

a spraying surface, facing the injection hole, onto which the oil-containing gas injected from the injection hole is sprayed, an oil discharge portion, communicating with the separation chamber, configured to discharge oil condensed on the spraying surface

Methodology Applied
Scientific EffectCondensation: Condensation

Data Source

PatentUS9260992B2Oil mist separator
Publication Date: 2016.02.16 TOKYO ROKI CO LTD
  • US9260992B2 patent drawing
  • US9260992B2 patent drawing
  • US9260992B2 patent drawing

AI summary

[Problem to be Solved]To enhance the performance for separation of oil mist from blow-by gas.[Solution]A filter element 13 which is to be attached to an oil separator unit 3 includes a core 31. This core is a double tube having an internal cylindrical member 34 and an external cylindrical member 35, and a space between the internal cylindrical member and the external cylindrical member is used as a separation chamber 36. An injection hole 39 for injecting blow-by gas while increasing its flow velocity is provided in the internal cylindrical member. A surface which is an inner wall surface of the external cylindrical member and which faces the injection hole is a spraying surface onto which the blow-by gas injected from the injection hole is sprayed. Moreover, an opening for oil discharge from which oil OL condensed on the spraying surface is discharged, and an opening for discharge from which the blow-by gas from which oil mist has been separated is discharged are provided in the core.