0
Mechanical Engineering
Mechanical Engineering is a branch of engineering that encompasses the generation and application of heat and mechanical power and the design, production, and use of machines and tools. Mechanical engineering involves application of the principles of dynamics, control, thermodynamics and heat transfer, fluid mechanics, strength of materials, materials science, electronics, and mathematics.
10,989 Questions
What is a turbine barring gear?
When a large turbine rotor stops it will still be hot and will tend to bend in the middle if left to cool normally. To prevent this the barring gear will turn the rotor slightly at given intervals during the cool down period.
How balance disc in boiler feed pump works?
The balancing disk is fixed to and rotates with the shaft. It is separated by a small axial clearance from the balancing disk head, or balancing sleeve, which is fixed to the casing. The leakage through this clearance flows into the balancing chamber and from there either to the pump suction or to the vessel from which the pump takes its suction. The back of the balancing disk is subject to the balancing chamber back pressure, whereas the disk face experiences a range of pressures. These vary from discharge pressure at its smallest diameter to back pressure at its periphery. The inner and outer disk diameters are chosen so that the difference between the total force acting on the disk face and that acting on its back will balance the impeller axial thrust.
If the axial thrust of the impellers should exceed the thrust acting on the disk during operation, the latter is moved toward the disk head, reducing the axial clearance between the disk and the disk head. The amount of leakage through the clearance is reduced so that the friction losses in the leakage return line are also reduced, lowering the back pressure in the balancing chamber. This lowering of pressure automatically increases the pressure difference acting on the disk and moves it away from the disk head, increasing the clearance. Now the pressure builds up in the balancing chamber, and the disk is again moved toward the disk head until an equilibrium is reached.
To assure proper balancing in disk operation, the change in back pressure in the balancing chamber must be of an appreciable magnitude. Thus, with the balancing disk wide open with respect to the disk head, the back pressure must be substantially higher than the suction pressure to give a resultant force that restores the normal disk position. This can be accomplished by introducing a restricting orifice in the leakage return line that increases back pressure when leakage past the disk increases beyond normal. The disadvantage of this arrangement is that the pressure on the seal chamber is variable, a condition that may be injurious to the life of the seal and therefore should avoided.
yes you certainly can mate
B4A72A is an old General Electric designation for a low carbon hot rolled plate steel grade similar in composition to AISI 1015 or 1018.
What are the weaknesses of cast iron?
Cast iron has been used for centuries, and was used occasionally in architecture in the pre-modern period. It was in 18th century Britain that new production methods first allowed cast iron to be produced cheaply enough and in large enough quantities to regularly be used in large building projects. One of the first important projects was The Iron Bridge in Shropshire, a precedent setting structure made almost entirely of cast iron. However, it was grossly over-designed, and the makers (principally Abraham Darby) suffered financially as a result. The quality of the iron used in the bridge is not high, and nearly 80 brittle cracks are visible in the present structure. Later designers and engineers, such as Thomas Telford improved both the design and quality of the material in his bridges (for example, at Buildwas upstream of Coalbrookdale) and aqueducts (such as the world-famous Pontcysyllte Aqueduct in North Wales.)
Architectural useWhat type of degree do you need to be a mechanical engineer designer?
A degree in Engineering or in Mechanical Engineering
What is the Brinell hardness test used for?
The Brinell hardness test is a standardized test in material science. It measures the hardness of a metal by measuring the indentation on the material caused by an indenter.
What are small milling machines used for?
Small milling machines do the same work as larger milling machines but tend to be used by individuals for their hobbies rather than by businesses. Milling machines are used to cut shapes out of metal and other materials.
What is the best brand for cast iron sinks?
Kohler is one of the top rated brands when it comes to sinks, cast iron or otherwise. They are available at Lowe's, Home Depot, and Berry Home Centers.
Where could one get cast iron tea pots?
Cast iron teapots are an item present on Teavana's website and are handmade with a holistically enameled inside and come equipped with a stainless steel basket for the purpose of holding fresh tea leaves. For example, the hobnail cast iron teapot is a featured item for $129.95.
What is a cast iron trivet used for?
A trivet is an object that can be placed on a table and is used for putting hot dishes on top of to avoid damaging the table. A cast iron model is a heavy duty and long lasting trivet.
When were Cast Iron Clawfoot Tubs created?
Cast iron clawfoot tubs have been around since the 19th century. People who had them back then were very high class and rich. Some claw foot tubs are considered antique today and can sell for a lot of money.
What are the capacity of Steam Turbines?
The capacity of each steam turbines has more than 530 GW in over 6000 installed units. The steam turbines provide high reliability and sustained high efficiency.
Where can one find cast iron Dutch ovens?
Many retailers offer cast iron Dutch ovens in the cooking section of their stores or websites, including Walmart, JC Penney, and Amazon. Outdoor stores such as Cabela's and Bass Pro Shops also sell cast iron Dutch ovens in the camping section. Cast iron Dutch ovens are available in both traditional and enameled coating.
What is a metering pump used for?
The metering pump is a kind that can meet the needs of various strict technological processes. The flow of the metering pump can be steplessly adjusted within the range of 0-100%. The structural characteristics of metering pumps are used to transport liquids (especially corrosive liquids). Special displacement pump.
Metering pumps are also called quantitative pumps or proportional pumps. Metering pumps are reciprocating positive displacement pumps, which are used for accurate metering, and the stability accuracy of metering pumps is usually required to not exceed ±1%. With the continuous development of modern industry toward automated operation and remote automatic control, Advantages of metering pumps, such as strong matching and adaptable medium (liquid), are particularly outstanding.
Guangzhou Ascend Precision Machinery Co.,Ltd.
How much does a large cast iron kettle cost?
Large cast iron kettles are usually pretty cheap however it depends on the brand you are getting. They go for about 30$ to 100$. They can be purchased online and locally at retail stores.
Which stress is used during the tensile test of mild steel?
During a tensile test of mild steel, the bar is tested until it breaks. It measures how much stress the mild steel can take before it finally breaks under the pressure.
What is a tool and cutter grinder used for?
A tool and cutter grinder is used to sharpen tool bits, milling cutters, along with a bunch of different cutting tools. It is a versatile machine that can perform a wide variety of grinding operations.
What is the use of hp and lp dosing in boilers?
hp dosing used for precipitate the silica from bfw in drum and lp dosing used for increase the ph in boiler to maintain 9.5 to 10.5
What are the advantages of pneumatic comparator over a mechanical comperator?
advantages and disadvantages of pneumatic comparators
What is critical pressure in nozzle?
Critical pressure in a nozzle is the pressure at which the flow of material through the nozzle reaches its maximum. Beyond which any increase in pressure will not result in an increase in flow. The point at which the velocity of a fluid in the throat of the nozzle reaches the local speed of sound, creating a sonic wave, or a sonic choke.
How cranes lift heavy loads without toppling?
Because anticlockwise torque is equal to clockwise torque and therefore the net torque is zero so the crane is in state of equillibrium and also there center of gravity pass through base therefore the cranes lift heavy load without toppling
What is fracture toughness of ceramics?
It depends on the ceramic. Most ceramics have fracture toughness between 0.7 AND 1 MPa - m^1/2. Some are lower, and some higher, up to 5 MPa-m^1/2
