21-03-2016, 11:47 AM
Beam Engine
2. Introduction *Beam Engines and water bucket pumps were introduced in Wanlockhead in 1745. *It was used to draw out water from mines, as well as to pump water into canals.The engine consisted of a large wooden frame into which a pivoted overhead beam was used to apply force generated by a pump rod and transfer that movement to a vertical piston. *This mechanism was mostly used in steam engines but nowadays it is used in water pumps, oil rigs , specifically designed sawing machine etc.
3. What is beam engine? • It is a type of steam engine where a pivoted overhead beam is used to apply the force from a vertical piston to a vertical connecting rod. • It is basically a 6 link mechanism that converts rotary motion of crank into linear straight line motion of vertical sliding link that in practice is used in pumps and other purposes
The first beam engines were water-powered, and used to pump water from mines. A preserved example may be seen at Wanlockhead in Scotland.
Beam engines were extensively used to power pumps on the English canal system when it was expanded by means of locks early in the Industrial Revolution, and also to drain water from mines in the same period, and as winding engines.
The first steam-related beam engine was developed by Thomas Newcomen. This was not, strictly speaking, steam powered, as the steam introduced below the piston was condensed to create a partial vacuum thus allowing atmospheric pressure to push down the piston. It was therefore called an Atmospheric Engine. The Newcomen atmospheric engine was adopted by many mines in Cornwall and elsewhere, but it was relatively inefficient and consumed a large quantity of fuel. The engine was improved by John Smeaton but James Watt resolved the main inefficiencies of the Newcomen engine in his Watt steam engine by the addition of a separate condenser, thus allowing the cylinder to remain hot. Technically this was still an atmospheric engine until (under subsequent patents) he enclosed the upper part of the cylinder, introducing steam to also push the piston down. This made it a true steam engine and arguably confirms him as the inventor of the steam engine. He also patented the centrifugal governor and the parallel motion. the latter allowed the replacement of chains round an arch head and thus allowed its use as a rotative engine.
His patents remained in place until the start of the 19th Century and some say that this held back development. However, in reality development had been ongoing by others and at the end of the patent period there was an explosion of new ideas and improvements. Watt's beam engines were used commercially in much larger numbers and many continued to run for 100 years or more.
Watt held patents on key aspects of his engine's design, but his rotative engine was equally restricted by the patent by an other of the simple crank. The beam engine went on to be considerably improved and enlarged in the tin- and copper-rich areas of south west England, which enabled the draining of the deep mines that existed there. Consequently, the Cornish beam engines became world famous, as they remain among the most massive beam engines ever constructed.
2. Introduction *Beam Engines and water bucket pumps were introduced in Wanlockhead in 1745. *It was used to draw out water from mines, as well as to pump water into canals.The engine consisted of a large wooden frame into which a pivoted overhead beam was used to apply force generated by a pump rod and transfer that movement to a vertical piston. *This mechanism was mostly used in steam engines but nowadays it is used in water pumps, oil rigs , specifically designed sawing machine etc.
3. What is beam engine? • It is a type of steam engine where a pivoted overhead beam is used to apply the force from a vertical piston to a vertical connecting rod. • It is basically a 6 link mechanism that converts rotary motion of crank into linear straight line motion of vertical sliding link that in practice is used in pumps and other purposes
The first beam engines were water-powered, and used to pump water from mines. A preserved example may be seen at Wanlockhead in Scotland.
Beam engines were extensively used to power pumps on the English canal system when it was expanded by means of locks early in the Industrial Revolution, and also to drain water from mines in the same period, and as winding engines.
The first steam-related beam engine was developed by Thomas Newcomen. This was not, strictly speaking, steam powered, as the steam introduced below the piston was condensed to create a partial vacuum thus allowing atmospheric pressure to push down the piston. It was therefore called an Atmospheric Engine. The Newcomen atmospheric engine was adopted by many mines in Cornwall and elsewhere, but it was relatively inefficient and consumed a large quantity of fuel. The engine was improved by John Smeaton but James Watt resolved the main inefficiencies of the Newcomen engine in his Watt steam engine by the addition of a separate condenser, thus allowing the cylinder to remain hot. Technically this was still an atmospheric engine until (under subsequent patents) he enclosed the upper part of the cylinder, introducing steam to also push the piston down. This made it a true steam engine and arguably confirms him as the inventor of the steam engine. He also patented the centrifugal governor and the parallel motion. the latter allowed the replacement of chains round an arch head and thus allowed its use as a rotative engine.
His patents remained in place until the start of the 19th Century and some say that this held back development. However, in reality development had been ongoing by others and at the end of the patent period there was an explosion of new ideas and improvements. Watt's beam engines were used commercially in much larger numbers and many continued to run for 100 years or more.
Watt held patents on key aspects of his engine's design, but his rotative engine was equally restricted by the patent by an other of the simple crank. The beam engine went on to be considerably improved and enlarged in the tin- and copper-rich areas of south west England, which enabled the draining of the deep mines that existed there. Consequently, the Cornish beam engines became world famous, as they remain among the most massive beam engines ever constructed.