Collage of ductile iron castings, machine components, worm gears, spur gears, sand castings, investment castings and die castings

Flywheel Flanges

What are Flywheels?

Flywheels are mechanical components that store kinetic energy and convert it later into circulatory motion. Essentially, these are big wheels that require a lot of momentum to start, but once they start are hard to stop. This momentum is typically used in situations where abrupt and unpredictable speed changes are needed. In mechanical engineering terms, flywheels store kinetic energy and convert it into angular momentum as and when needed. The advantages of a flywheel are that they conserve momentum and dampen speed fluctuations of the engine. The larger the diameter of the flywheel, or the heavier they are, the more kinetic energy they store. Likewise, the flywheels that revolve faster store more angular momentum than flywheels that revolve slowly. While steel was the preferred choice of material for flywheels earlier, carbon-fiber based composite materials are a popular choice today.

What are flanges?

Flanges are mechanical components that are frequently used to connect two sections together by joining them together so that sections can be assembled / disassembled easily. They are typically flat protruding surfaces that are either bolted together or welded together with a gasket between them. Flanges protect the components themselves, while allowing them to function as a unit. Pipes, gears, and flywheels are examples of where flanges are used. Flanges can be classified in many ways. Bulk head flanges, slip-on or hubbed flanges, lap joint flanges, welding neck flanges, blind flanges and threaded flanges are some ways of classifying them.

What are flywheel flanges?

As the name implies, flywheel flanges are flanges that are attached to the flywheel. In most of the cases, the crankshaft is connected to the flywheel by means of the flanges. The flywheel end of the crankshaft has a larger diameter than the other end. This provides a flanged face to mount the flywheel. A shallow grove in the flywheel allows it to be aligned over the flanged end of the crankshaft; it also provides radial support for the joints.

Materials used in Casting Flywheel Flanges

India is a major manufacturer of flywheels and flywheel flanges due to availability of inexpensive labour and raw material. Quality conscious flywheel flanges manufacturers take adequate measures to provide flanges that are perfectly within tolerance limits. Ductile iron, S.G.I. and gray iron are some of the materials that are used for casting of flywheel flanges.