Water Lubricated Twin-Screw Compressor Water Quality Management

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Solution Overview

Problem

Conventional water lubrication screw-type compressors face issues with water quality degradation, leading to decreased cooling and airproofing effectiveness over time, which affects compression efficiency and increases metal corrosion.

Innovation Solution

A water lubrication twin-screw air compressor system that includes a water-loop system with multiple water treatment and filtration devices to maintain water quality, comprising a water supply device with a first and second water-treatment device and a water filter, ensuring purified water is injected into the compressor for improved cooling, lubrication, and airproofing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-generated harmful factors

If water is used for lubrication in screw-type compressors, then oil-free operation is achieved with no vaporized oil contamination, but water quality degrades over time leading to decreased cooling and airproofing effectiveness

Engineering Contradiction:
Improvevaporized oil contaminationVSAvoidwater quality stability
Core Design Contradiction:
Object-generated harmful factorsVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-treating water through filtration and treatment devices before it enters the compressor. The water-loop system includes a water filter and water treatment device that prepare the water in advance, ensuring it maintains high quality throughout operation and preventing degradation before it can affect compression efficiency.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements continuity of useful action through the closed water-loop system that continuously circulates and re-treats water. The water is constantly filtered and treated as it recirculates through the compressor, maintaining consistent cooling and lubrication effectiveness without interruption or quality loss over time.

Inventive Principle:
Principle #20Continuity of useful action

2Device complexity

If water quality is not maintained, then the system is simpler, but corrosion of metal components increases

Engineering Contradiction:
Improvewater treatment system complexityVSAvoidmetal corrosion
Core Design Contradiction:
Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by pre-treating water through filtration and treatment devices before it enters the compressor. The water-loop system includes a water filter and water treatment device that prepare the water in advance, ensuring it maintains high quality throughout operation and preventing degradation before it can affect compression efficiency.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent implements continuity of useful action through the closed water-loop system that continuously circulates and re-treats water. The water is constantly filtered and treated as it recirculates through the compressor, maintaining consistent cooling and lubrication effectiveness without interruption or quality loss over time.

Inventive Principle:
Principle #20Continuity of useful action

3Temperature

If water is injected into the compression chamber, then cooling and airproofing effects are improved, but water quality degradation reduces these effects over time

Engineering Contradiction:
Improvecompression temperatureVSAvoidcooling and airproofing effectiveness
Core Design Contradiction:
TemperatureVSReliability

Solution Approach 1:

The patent implements continuity of useful action through the closed water-loop system that continuously circulates and re-treats water. The water is constantly filtered and treated as it recirculates through the compressor, maintaining consistent cooling and lubrication effectiveness without interruption or quality loss over time.

Inventive Principle:
Principle #20Continuity of useful action

Solution Approach 2:

The patent applies parameter changes by continuously monitoring and adjusting water quality parameters through filtration and treatment processes. The system modifies the physical and chemical properties of the water to maintain optimal conditions for cooling and airproofing, ensuring consistent performance throughout operation.

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

The system maintains water quality, reducing metal corrosion and enhancing compression efficiency by continuously purifying and filtering water, thereby improving cooling and airproofing within the compressor.

Implementation Method 1

The second water-loop unit includes a water filter to remove the impurities in water

Methodology Applied
Scientific EffectFiltration: Filter (physical)

Implementation Method 2

the oil cools down the compression heat during the compression process, thus decreasing the compression temperature

Methodology Applied
Scientific EffectCooling: Cooling

Implementation Method 3

The water lubrication screw-type compressor employs an oil-free design in the compression chamber

Methodology Applied
Scientific EffectLubrication: Lubrication

Data Source

PatentUS11421687B2Water lubrication twin-screw air compressing system
Publication Date: 2022.08.23 FUSHENG IND CO LTD
  • US11421687B2 patent drawing
  • US11421687B2 patent drawing
  • US11421687B2 patent drawing

AI summary

A water lubrication screw type air compressor includes a compressor, an air-loop system and a water-loop system. The water-loop system includes a water supply device, a first water-loop unit and a second water-loop unit. The water supply device includes a first water-treatment device to modify the water quality and provide purified water. The first water-loop unit includes a second water-treatment device to modify water quality and reduce the corrosion of metal components. The second water-loop unit includes a water filter to remove the impurities in water and maintain the purity of cycling water. Therefore, the water-loop system in the present disclosure includes multiple water-treatment devices and filters to maintain the water quality. The purified water ensures better cooling, lubrication and air proofing when injected into the compressor.