What is Alpha lubrication system?
An Alpha Lubricator or ME Lube operating in ACC-mode (Adaptive Cylinder oil Control) adapts the lubricating oil feed rate to the fuel oil sulphur content and the engine load. The ACC-mode has been the standard on MAN B&W two-stroke engines since 2004.
What are 2 types of lubrication systems in 4 stroke engines?
Four-stroke engines are lubricated by oil held in an oil sump. The oil is distributed through the engine by splash lubrication or a pressurized lubrication pump system; these systems may be used alone or together.
How many accumulators does an alpha lubricator have?
Lubricator Unit: It Is Consisting Of Two Or One Lubricator (depending On Cylinder Bore). Each Lubricator Unit Equipped With One Accumulator With Nitrogen Pressure Of 25-30 Bar On The Inlet Side And One At Outlet Side With A Pre Pressure Of 1.5 Bars For Every Lubricator.
What is the function of accumulator in Alpha lubricator?
Accumulator tanks on the lubricator inlet pipes ensure adequate filling of the lubricator while accumulators on the outlet pipes serve to dampen the pressure fluctuations.
What is HMI setting in Alpha lubricator?
In the present version of the Alpha Lubricator System, the crew onboard the vessel inputs the so-called “HMI-setting” based on the sulphur percentage of the fuel used and a conversion table, as in the figure.
What are the 3 or 4 types of lubrication systems?
There are three different types of lubrication: boundary, mixed and full film. Each type is different, but they all rely on a lubricant and the additives within the oils to protect against wear.
What are four different types of lubricants?
Let’s start with the fundamentals. Lubricants are classified into four types: oil, grease, penetrating lubricants, and dry lubricants. The two most common lubricants you’ll encounter on a daily basis are oil and grease, but your facility will still use dry and penetrating lubricants.
What is pulse lubrication?
A pulse lubrication system is an electronically controlled cylinder oil lubrication system for Wartsila engines, wherein metered quantity of cylinder oil is injected in to the liner, depending on the engine load.
What is the purpose of accumulator in Alpha lubricator?
What is cylinder lubrication?
Cylinder lubrication is required in order to lubricate the piston rings to reduce friction between the rings and liner, to provide a seal between the rings and the liner, and to reduce corrosive wear by neutralising the acidity of the products of combustion.
What is sweep test in main engine?
The sweep test determines the optimal cylinder oil feed rate relative to the sulfur content in the fuel. This engine and operation-specific ‘feed rate factor’ can then be used to recalculate the optimal feed rate when switching to fuels with different sulfur content.
What are the 5 types of lubricants?
Lubricants are classified into four types: oil, grease, penetrating lubricants, and dry lubricants. The two most common lubricants you’ll encounter on a daily basis are oil and grease, but your facility will still use dry and penetrating lubricants.
What are the types of lubrication?
There are three different types of lubrication: boundary, mixed and full film. Each type is different, but they all rely on a lubricant and the additives within the oils to protect against wear. Full-film lubrication can be broken down into two forms: hydrodynamic and elastohydrodynamic.
What are H1 lubricants?
H1 lubricants are food-grade lubricants used in food-processing environments where there is the possibility of incidental food contact. H2 lubricants are food-grade lubricants used on equipment and machine parts in locations where there is no possibility of contact.
What are the three types of lubricants?
What will happen if cylinder oil has too much alkaline?
At high feed rates, drip oil analysis shows high residual BN — the oil has an excess of alkalinity to neutralize any acids formed in the engine during the combustion. As well as using an excessive amount of cylinder oil, alkalinity overfeeding can lead to the formation of deposits on the piston top and ring lands.
What are marine lubricants?
Marine lubricants are a special class of lubricants that are manufactured to meet the rugged performance required in marine vessels for optimized operations. Various machinery component in marine systems require lubricants for better functioning, protection, and prolong life cycles.
What is TBN value?
Total Base Number (TBN) is a measurement of basicity that is expressed in terms of the number of milligrams of potassium hydroxide per gram of oil sample (mg KOH/g). TBN is an important measurement in petroleum products, and the value varies depending on its application.
Why choose Alpha lubricants?
We accomplish the highest level of performance and protection in the industry by using the latest in lubrication technologies and the highest grade of additives available on the market today. Alpha Lubricants specifically formulates its wide selection of oils and greases for almost all types of engines, machinery, and environments.
How does the Alpha cylinder lubrication system work?
Figure 2.1: Cylinder lubrication system with Alpha lubricators. A pump station delivers lube oil to the lubricators at 45 bar pressure. The lubricators have a small piston for each lube oil quill in the cylinder liner, and the power for injecting the oil comes from the 45 bar system pressure, acting on a larger common driving piston.
What is the feed rate of Alpha cylinder lubricator?
The Alpha cylinder lubricator has demonstrated a reduction of cylinder oil feed rate to 0.3 gm / BHP hr, which on a 50,000 BHP engine, saves US $ 50,000 p.a. Figure 2.1: Cylinder lubrication system with Alpha lubricators.
What is high speed lubrication system?
The new lubrication system is given by a unit currently called the “Alpha lubricator” which is also the trade name. In this paper, the system is called the “High speed lubricator”. The high speed lubricator supplies more oil between the piston rings than conventional lubricator by the lubrication system given below.