Introduction To Mechanical Devices

Humans have been building mechanical systems for thousands of years. Over time, several basic elements were created, and are now referred to as "simple machines". Simple machines are the very basic building blocks of mechanical operation, and provide the user with a form of mechanical advantage. Simple machines make working and living easier, and have allowed for continual human development throughout history.
6 different simple machines:
the lever
the wheel and axle
the pulley
the inclined plane
the wedge
and the screw.
These 6 elements form the basis for complex machinery even today. The 6 machines can be divided into 2 categories based on their operation: machines that require an equilibrium of torque, and those that require an equilibrium of vector forces.

CAD : What A Wonderful Field It Is

Engineers, design professionals, and manufacturers have learned the value of using and developing technologies based on CAD, or Computer Aided Drafting. This ever expanding field utilizes CAD for conceptual design and layout of virtual products, effectively eliminating the high cost of manufacturing a test product; creating architectural, construction, and building plans for contractors; planning mechanical, electrical, and plumbing layouts for builders and manufacturers; and all in a fraction of the time of what was once possible using 2 dimensional drafting practices.
So why seek a career in CAD drafting? The median salary for an entry-level CAD is approximately $40,000 per year, and it provides employment opportunities in almost every field. CAD is used in the medical and forensic science fields; for manufacture of aviation, automotive, and ship building; and 2D & 3D modeling of tools and machinery. CAD drafting has had an enormous impact on almost every field imaginable, and without it modern advancements would still be decades away.
The future of CAD is already moving forward, and students of CAD and Auto-CAD will be poised on the cutting edge of technology as 3D and Spatial 3-D holographic imaging replace 2D as the standard. In order to take full advantage of this, finding the right CAD drafting school is important, and one city stands out: Kansas City, Missouri is in the right location and has the right schools to help students learn the skills they'll need.

Disadvantages of Mechanical Engineering

Disadvantages of Mechanical Engineering
The workload is usually high and the atmosphere is competitive. Even Working environment is not so best. You find much Air conditioners like Software jobs. Also, despite recent increases in enrollment of women across all science and engineering disciplines, mechanical engineering still contains the lowest percentage of women. Since, it involves bit hard work.

Advantages are more than Disadvantages. so, dont afraid of Mechanical engineering.

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Mechanical Core Jobs

Mechanical Core Jobs

As a Mechanical Engineer we all like to join in a Mechanical Core Job. Mechanical engineering is finding more and more applications these days in other areas of engineering also.

Now we are having great opportunities in CAD/CAM industry. It is the future of Mechanical engineering.

Simplex and Duplex Pump

Simplex and Duplex Pump

A simplex pump, sometimes referred to as a single pump, is a pump having a single liquid (pump) cylinder. A duplex pump is the equivalent of two simplex pumps placed side by side on the same foundation.The driving of the pistons of a duplex pump is arranged in such a manner that when one piston is on its upstroke the other piston is on its downstroke, and vice versa. This arrangement doubles the capacity of the duplex pump compared to a simplex pump of comparable design.

Direct-Acting and Indirect-Acting Pumps

Direct-Acting and Indirect-Acting Pumps

Some reciprocating pumps are powered by prime movers that also have reciprocatingmotion, such as a reciprocating pump powered by a reciprocating steam piston. The piston rod of the steam piston may be directly connected to the liquid piston of the pump or it may be indirectly connected with a beam or linkage. Direct-acting pumps have a plunger on the liquid (pump) end that is directly driven by the pump rod (also the piston rod or extension thereof) and carries the piston of the power end. Indirect-acting pumps are driven by means of a beam or linkage connected to and actuated by the power piston rod of a separate reciprocating engine.

Reciprocating Pumps types

Reciprocating positive displacement pumps are generally categorized in four ways:
Direct-acting or indirect-acting
Simplex or duple
Single-acting or double-acting
Power pump