Refrigerating Machine Oil Friction Reduction via Polymer Additive

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional refrigerating machine oils fail to adequately reduce friction in regions with low sliding speeds, such as elastic fluid lubrication, mixed lubrication, and boundary lubrication regions.

Innovation Solution

The development of a refrigerating machine oil containing a lubricating base oil and a polymer additive, with a carbon residue of 10% residual oil set at 0.05% by mass or more, to improve friction characteristics in these low-speed regions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If the viscosity of conventional refrigerating machine oil is reduced, then friction in fluid lubrication region is reduced, but friction in elastic fluid lubrication region, mixed lubrication region, or boundary lubrication region cannot be sufficiently reduced

Engineering Contradiction:

Improvefriction in fluid lubrication regionVSAvoidfriction reduction in low sliding speed region

Core Design Contradiction:

ForceVSReliability

Solution Approach 1:

The patent changes the chemical composition parameters of the lubricating oil by specifying a particular viscosity index (80 or more) and sulfur content (0.03 wt% or more). This parameter optimization allows the oil to maintain appropriate viscosity characteristics across different sliding speed regions, effectively reducing friction in elastic fluid, mixed, and boundary lubrication regions without sacrificing fluid lubrication performance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite lubricating oil formulation that combines base oil with specific additives meeting defined chemical composition requirements. This composite material approach integrates multiple functional components that work synergistically to provide comprehensive friction reduction across all lubrication regimes, including low sliding speed regions where conventional single-component oils fail

Inventive Principle:

Principle #40Composite materials

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

This solution effectively reduces the friction coefficient in regions with low sliding speeds, enhancing the lubricating performance of refrigerating machine oils.

Implementation Method 1

a polymer additive, wherein a carbon residue of 10% residual oil is 0.05% by mass or more

Methodology Applied

Scientific EffectAdsorption: Adsorption

Data Source

PatentUS20250154425A1Refrigerating machine oil, working fluid composition for refrigerating machine, lubricating method, and method for producing refrigerating machine oil

Publication Date: 2025.05.15 ENEOS CORP

AI summary

A refrigerating machine oil containing: a lubricating base oil; and a polymer additive, wherein a carbon residue of 10% residual oil is 0.05% by mass or more.