Mechanical Engineering Information

T he pump is a mechanical conveying liquid or liquid booster.   It will be the prime mover of the mechanical energy or other external energy transmitted to the liquid, the liquid energy increase.   The pump is mainly used to transport liquids including water, oil, acid and alkali liquid, emulsion, suspension, emulsion and liquid metal, etc., but also transport liquid, gas mixtures and liquids containing suspended solids.   Upgrading of water for human life and production are equally important.Centrifugal pump is one of the commonly used pumps in our daily life. C ENTRIFUGAL PUMP A centrifugal pump is a rotodynamic pump that uses a rotating impeller to increase the pressure of a fluid. Centrifugal pumps are commonly used to move liquids through a piping system. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits into the ...

H ave you ever watched wisps of smoke drifting from smokestacks and wondered how much   energy they're uselessly pumping into the air? Maybe less than you might think! Saving energy is a huge and costly problem for factory bosses and it's one reason they often install devices called   heat exchangers   to salvage as much heat as possible from waste gases. Heat exchangers have lots of other familiar uses too. Engines in cars,   ships and planes  use heat exchangers to work more efficiently, and if you have a refrigerator or an air-conditioner in your home, those are using heat exchangers too. So what exactly are heat exchangers and how do they work?                                  HEAT EXCHANGER   Definition Suppose you have a gas  central heating furnace  (boiler) that heats hot-water radiators in various rooms in your home. It works by burnin...

T rickling down from the motocross world, disc brakes have now become popular on off-road bicycles. Discs provide powerful and reliable braking in all types of weather and terrain so they're ideal for trail riding. Plus, unlike rim brakes, discs aren't compromised should you hit a hole or land hard and bend your wheel. There are significant differences between discs and rim brakes, however. So here we provide an overview of how discs work, the different types, and basic maintenance instructions. Disc brakes generate amazing stopping power even in the worst conditions because they utilize rotors (photo) attached to the wheel hubs, and calipers attached to the frame containing specially designed pads (also called "brake shoes").  Unlike the soft rubber pads used on rim brakes, discs use hard metallic- or ceramic-based pads that are less affected by water, mud and heat  . Figure Disc Brake DISC BRAKE A   disc brake  is a type of   bra...