The process of hydrodynamic cleaning and flushing of oil systems is used among others to clean oil systems of turbines
Cleaning and flushing of oil systems of machines and equipment
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The performance and reliability of oil systems of machines depends to a large extent on the cleanliness of oil and the installation. The removal of contaminants such as oil aging products, rust and metal filings directly contributes to a decrease in the wear of bearings, gears and seals and consequently to a reduction in the costs of repairs and improvement in work safety.
Hydrodynamic cleaning and flushing of an oil system makes it possible to obtain the cleanliness class of the oil and installation compliant with guidelines of the system being cleaned.The cleaning process is divided into three stages:
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1. Hydrodynamic cleaning
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Hydrodynamic cleaning of internal surfaces of the oil system with a high-pressure water jet.
A proper combination of water pressure and high-pressure cleaning accessories makes it possible to loosen all sludge, resins, rust, corrosion products and other contaminants, including those connected to assembly (welding slag, filler metal drops, filings left after polishing). The entire internal surface of the oil system, i. e. all pipes, tanks, bearing crankcases, radiators, filter housings, etc. is cleaned. A clean and dried pipe is secured against corrosion until its assembly with an oil mist sprayed across its entire length. This prevents the corrosion process from starting.
2. Flushing
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Flushing of an oil system with oil intended for operation along with its simultaneous filtration.
In order to remove all contaminants a forced turbulent flow of oil through the system is used.Full-flow flushing is carried out using a high-performance pumping and flirting unit. The so-calledbypasses are made in front of bearings and servo-motors.During flushing oil flows through absolute filters. Oil cleanliness class is checked at this time inorder to determine the effectiveness of the process. Tests are performed on site using automaticparticle counters, integrated in the configuration of the pumping and filtering system. Theflushing process is considered complete when all the defined criteria (cleanliness class and thelack of particles above a specified size in various areas of the oil system) are met.
3. Filtering
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Additional bypass filtering of oil after assembly of the system, both before and during its start-up.
Final cleaning of the system is carried out using oil pumps of the machine with a simultaneously working pumping and filtering unit connected via a bypass to the main oil tank. The purpose of this process is to remove after-assembly contaminants from the oil system. When the defined oil cleanliness is obtained in the entire oil system, the machine is ready for use.
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Main advantages of the use of the process
- Longer intervals between repairs
- Higher availability of the machines
- Introduction of active preventive maintenance of machines and devices
- Detection of the beginnings of wear of machine elements by monitoring contaminants originating in oil
- Longer time periods between oil changes and the resulting lower oil onsumption
- Lower wear of oil filtering inserts
- Lower emissions of used oils
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The process of hydrodynamic cleaning and flushing of oil systems is used among others to clean oil systems of turbines
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