Water-Lubricated Compressor Actuator with Composite Sleeves
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional oil-lubricated and cooled actuators for compressors suffer from power loss, seal wear, oil contamination, and risk of water-induced corrosion or short circuits, making them inefficient and prone to failure in applications requiring oil-free compressed gas.
Innovation Solution
A water-lubricated and cooled actuator with a stainless steel shaft, epoxy resin-embedded windings, and composite sleeves, eliminating the need for oil and preventing corrosion, with an integrated water circuit for both cooling and lubrication, and no seals between the actuator and compressor element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional oil-lubricated actuators are used, then the actuator can be lubricated and cooled effectively, but the compressed gas becomes contaminated with oil and power loss occurs due to seal friction
Solution Approach 1:
The invention extracts and removes the oil lubrication system entirely from the actuator, replacing it with a water-based lubrication and cooling system. This extraction eliminates the source of oil contamination in the compressed gas while also removing the need for oil seals that cause power loss through friction.
Solution Approach 2:
The invention transitions from oil-based lubrication to water-based lubrication and cooling. Water is introduced as the hydraulic medium for both lubricating the bearings and cooling the actuator, eliminating oil contamination while providing effective lubrication with water-lubricated bearings that do not require oil seals.
2Reliability
If seals are used to prevent oil contamination and water entry, then protection is provided, but the seals wear out, cause power loss, and can fail leading to leaks
Solution Approach 1:
The invention extracts and removes the seal components from the actuator design. By eliminating the need for seals between the actuator and compressor element, the problems of seal wear, power loss, and potential failure are completely avoided. The water-lubricated bearing system allows for sealless operation.
Solution Approach 2:
The water-lubricated bearing system is inherently self-protecting against corrosion and wear without requiring additional sealing components. The water circulation system provides continuous lubrication and cooling that protects the bearings and internal components without the need for external seals that would wear and require maintenance.
3Temperature
If copper windings are exposed to air for cooling, then heat dissipation occurs, but the windings are vulnerable to water-induced short circuits when water enters the actuator
Solution Approach 1:
The invention replaces air cooling with water-based cooling through the composite sleeve system. The laminations are surrounded by composite sleeves that conduct heat away from the copper windings, and water circulation provides efficient thermal management without requiring the windings to be directly exposed to water, thus preventing short circuits while maintaining effective cooling.
4Reliability
If stainless steel shaft and composite sleeves are used, then corrosion resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The invention employs composite materials, specifically stainless steel for the shaft and composite sleeves surrounding the laminations. These materials provide superior corrosion resistance in the water-lubricated environment. The composite sleeves also provide electrical insulation and heat conduction pathways, combining multiple functions in a single material system that, while requiring specialized manufacturing, significantly enhances reliability.
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 solution results in a 100% oil-free compressed gas with 'class zero' ISO certification, improved heat dissipation, reduced wear, and simplified assembly, as well as protection against water-induced damage, enhancing the reliability and efficiency of the compressor system.
Implementation Method 1
the epoxy resin will protect the windings on the motor stator
Implementation Method 2
the composite sleeves will protect the laminations on the motor rotor and motor stator
Implementation Method 3
the motor bearings are water-lubricated
Implementation Method 4
the actuator is further equipped with a cooling circuit for a coolant characterized in that the coolant is water
Implementation Method 5
the epoxy resin is better able to remove heat than air... Heat is conducted better by this epoxy resin than by air
Data Source
AI summary
An actuator for a compressor element, the actuator comprising an electrical motor with a motor casing which defines a motor chamber in which a motor rotor is positioned rotatably with the help of one or more motor bearings in relation to a motor stator, whereby the motor stator is built of laminations around which windings are attached and whereby the motor rotor is built of a shaft with laminations, whereby the actuator is further equipped with a cooling circuit for a coolant, wherein the coolant is water, the motor bearings are water-lubricated, the shaft on the motor rotor is made from stainless steel, the windings are embedded in an epoxy resin and a composite sleeve is applied around each of the laminations on the motor rotor and on the motor stator.