What is engine Bedplate?

A structure which forms the base of an engine upon which the bearings and frame are mounted. “The bedplate consists of high, welded longitudinal girders and cross girders with cast steel bearing supports.”

What are the frame and the bedplate used for?

Simply: a bed plate or frame, usually of steel or cast iron, upon which an engine or other machine rests and to which it is attached. Briefly: The bed plate acts as the main strength member, maintains correct alignment and supports the weight of the components.

What is a frame in marine engine?

byBijoy Chandrasekhar. It carry the crosshead guides and support the engine entablature (the cylinder block). On large engines, the A frames are individually erected on the bedplate directly above the transverse girders.

Why crosshead lubrication is difficult?

The crosshead on a slow speed 2 stroke is a difficult bearing to lubricate effectively. The load is continually downward and because the con rod swings about the pin, changing direction each stroke, true hydrodynamic lubrication cannot take place.

Which part of the bedplate supports the main bearing and crankshaft?

Transverse members are fitted between each throw of the crankshaft. These support the main bearing saddles and Tie -rod connection.

Why holding down bolts run loose?

Holding down bolts often run loose due to vibration. Vibration is due to torque; fluctuation and shock loading. Main causes are Vibration, Overloading of engine, Slack chocks and Hull deflection.

What will happen if there are leakage during the compression stroke?

Compression loss is a result of a leak in one or more of the cylinders caused by normal engine wear and tear. If you experience compression loss in one cylinder of the engine, it can cause misfiring and poor vehicle performance.

What is Crankpin bearing?

A crankpin is the part of the crank of a crankshaft to which the connecting rod is attached. Crankpins transfer up-and-down motion between the crankshaft and connecting rod. Connecting rods typically have two-piece crankpin bearings for connecting the lower end of the rod to a crankpin of a crankshaft.

How crosshead lubrication is done?

The crosshead on a slow speed 2 stroke is a difficult bearing to lubricate effectively. Instead the lubrication starts as boundary, and as the rubbing speed increases, a hydrodynamic film is built up. As the rubbing speed decreases the lubrication becomes boundary once again.

What is entablature in Ship Engine?

The entablature is usually made of cast iron. While assembling or installing an engine in the ship, entablature can be fitted either by making casting for each cylinder of the engine and then bolting the mating surfaces together, or by casting in multi-cylinder units and then bolting them together.

What happens if the entablature of an engine is damaged?

Damage to entablature can lead to loss of engine power and may also cause damage to crankshaft and other components. The Entablature of the engine comprises of the cooling jacket for the cylinder liner where the high temperature combustion takes place.

What does entablature mean in architecture?

Definition of entablature. : a horizontal part in classical architecture that rests on the columns and consists of architrave, frieze, and cornice.

Is there a single cylinder entablature engine on Mews?

Julius has prepared working drawings for all these engines and will appear on MEWS in the coming weeks. This is Muncaster’s single cylinder entablature engine with sliding crosshead.