Lubricant Sampling Circuit With Reservoir Refill and Valid Oil Capture

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Solution Overview

Problem

Existing methods for obtaining valid oil samples from technical systems, such as wind turbines, are limited by poor accessibility and security concerns, and current solutions do not allow for flexible sampling or easy replacement of lubricant samples.

Innovation Solution

A lubricant circuit with a branching system and integrated reservoir, where lubricant flow is controlled by temperature-dependent valves and pumps, allowing for the collection of a valid lubricant sample and its replacement without manual intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual sampling methods are used, then the sampling process is simple, but accessibility and safety become problematic

Engineering Contradiction:
Improvesampling process simplicityVSAvoidaccessibility and safety issues
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

An automated sampling system acts as an intermediary between the lubricant circuit and the user. The system includes a sampling device with a reservoir that automatically collects lubricant samples from the circuit through controlled flow paths, eliminating the need for manual intervention in difficult-to-access areas while maintaining sample validity through temperature-dependent sampling conditions

Inventive Principle:
Principle #24Intermediary (Mediator)

2Quantity of substance

If a container is filled with lubricant via a switchable valve, then a lubricant sample can be obtained, but the container cannot be refilled without manual removal

Engineering Contradiction:
Improvelubricant sample availabilityVSAvoidrefilling flexibility
Core Design Contradiction:
Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The sampling system enables continuous operation through automatic refilling. When the reservoir reaches its storage capacity, the system automatically detects this condition and redirects the lubricant flow to refill the reservoir, eliminating downtime and maintaining continuous sample availability without manual intervention

Inventive Principle:
Principle #20Continuity of useful action

Solution Approach 2:

The system performs self-service through automatic detection and refilling mechanisms. Sensors monitor the reservoir level and automatically control valves to redirect lubricant flow for refilling, allowing the system to maintain itself without external intervention and ensuring continuous sample availability

Inventive Principle:
Principle #25Self-service

3Measurement precision

If oil samples are taken from a flow-through area at operating temperature, then the samples are valid for determining system condition, but the sampling process becomes more complex

Engineering Contradiction:
Improvesample validity for system condition determinationVSAvoidsampling process complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The system utilizes temperature as a controlling parameter for sample validity. Temperature-dependent valves automatically open or close based on whether the lubricant has reached operating temperature, ensuring that samples are only collected when thermally valid without requiring complex manual temperature monitoring or decision-making processes

Inventive Principle:
Principle #35Parameter changes

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

Enables flexible and simplified collection of valid lubricant samples, ensuring the sample remains valid and can be replaced without manual removal, improving accessibility and reducing operational complexity.

Implementation Method 1

temperature-dependent valves and pumps, allowing for the collection of a valid lubricant sample

Methodology Applied
Scientific EffectTemperature-dependent valve operation: Thermal Expansion

Data Source

PatentEP3818294B1Continuous provision of a valid lubricant sample
Publication Date: 2023.10.25 ZF FRIEDRICHSHAFEN AG
  • EP3818294B1 patent drawingFigure 1~2

AI summary

The invention relates to an arrangement of means forming a lubricant circuit (101), comprising at least one lubricant line (105), at least one line branching (107) which branches the lubricant line (105) into a first branch (113) and a second branch (115), and at least one lubricant reservoir (117) built into the first branch. The arrangement comprises at least one line junction (118) where the first branch (113) and the second branch (115) merge, wherein the first branch (115) is lockable and releasable.