In a steam engine, fire box is the area where fuel is burned, generating heat to boil water in the boiler. Mostly box-shaped, hence its name. The hot gas generated in the fire box is pulled through the tube rack that flows through the boiler.
Video Firebox (steam engine)
Lokomotif uap fire tube firebox
In standard steam locomotive steam stoves, fire boxes are surrounded by water chambers on five sides. The bottom of the fire box is open to atmospheric pressure, but is covered by an open fire (solid fuel) or an ignition pan (liquid fuel). If the engine burns solid fuel, such as wood or coal, there is a scar that covers most of the bottom of the fire box to hold fire. An ashpan, mounted under a fire box and under the grates, captures and collects hot coals, ash, and other solid combustion wastes as it falls through the furnace. In a locomotive that burns coal, the stove can be shaken to clean dead ash from the bottom of the fire. They are shaken either manually or (in larger locomotives) by a powerful gratter beatter. Locomotives that burn wood have fixed grates that can not be shaken. Wood ash is generally a powder that will fall through the grates without needing more anxiety than the thrill of the locomotive that scrolls the track. The flame grates must be replaced periodically because of the extreme heat they have to endure. The combustion air enters through the bottom of the fire box and the airflow is usually controlled by a silencer door above the ash collection bag from the ash pans. Locomotives that burn liquid fuels - usually "Bunker C" fuel oil or such heavy oil - do not have grates. Instead, they have a metal gauge metal gauge welded tightly at the bottom of the fire box. The fire pans are covered with refractory bricks and the fire box has a refractory brick layer, usually up to the level of fire box door, all the way around the fire box. The oil burner is a nozzle-filled nozzle for the oil to flow over the steam jet that sprays the oil into a fine mist that burns in the fire box. The oil-burning nozzle is usually installed at the front of the fire box, protected by a fireproof brick, and directed to a brick fireplace wall under the fire box door. The silencer controls the airflow to the oil flame.
Arch bricks
There is a large brick arch (made of fire brick) attached to the front wall of a stone stove under firetubes. It extends backward in the front third to half of the ride. This is supported on a curved tube, a chiffon, or a circulator. The brick arches direct heat, fire, and smoke back over the fire to the back of the fire box. Visible smoke contains combustible carbonaceous particles and combustible combustible gas. The purpose of this diversion is to produce a more complete combustion of these particles and gases which make the locomotive more efficient and cause less smoke to be emitted from the pile. Without the curvature, the fire and visible smoke will be sucked directly into the firetubes without being completely burned, causing visible smoke to be emitted in the pile. The brick arches and their supporters (curved tubes, thermic chiffons, and circulators) require frequent replacements due to the extreme heat they bear.
Firetubes
Firetubes attached to one wall of a fire box (front wall for longitudinal boiler, upper for vertical boiler) and carrying hot gas product from burning through boiler water, heating it, before they escape to the atmosphere. Firetubes serve the additional purpose of staying flat flue sheets (flue) (front and back) so that only the top of the smoke sheet front and the bottom of the back smoke sheet should be separately prepared.
Spreadsheets and still
The metal walls of the fire box are usually called sheets , which are separated and supported by fixed . Keep supporting and installing "sheets" (plates) against pressure. Ideally, they should be located at right angles to the sheets, but because the outer sheets (wrapping sheets) are radial and the top of the fire box (crown sheets) is relatively flat by comparison, such a relationship to both sheets is not possible. The actual stay location is a compromise. Because the rest of the damage is hidden, a longitudinal hole, called tell-tales, is drilled inside which will blow water and steam, revealing if they are damaged. A boiler with more than 5 fixed ruins, or two next to each other, must be removed from service and residence replaced. The intermingling spark plug, usually located at the highest part of the crown sheet, has a melted metal alloy core that melts if the boiler's water level is too low. Steam and water blown into the fire box alerted the locomotive crew to low water conditions and helped to extinguish the fire. Not all locomotives are equipped with fusible plugs. Also, plugs that can be mixed should be replaced periodically, about every three months for locomotives in regular service, because the soft metal soft alloys will melt from time to time even if boiler water is brought to the right level. The "mudholes," or washout plugs, allow access to the inside of the boiler to wash and clean the mud and boiler scale.
The sheets on the left and the right are called "side sheets" while the sheets on the front of the fire box are chimney sheets. The "front flue sheets" are in front of the boiler and at the back of the smoke box. The "back sheet" is at the back of the fire box and has a door open in it. crown sheet is the top of the fire box. The crown sheet should be covered by water at all times. If the water level drops below the crown sheets, it will become overheated and begin to melt and change shape, usually degenerate between fixed crowns. If the condition continues, the crown sheets will eventually be forced from the fixed crown by the pressure in the boiler, resulting in a boiler explosion. This condition, usually caused by human error or lack of attention, is the biggest cause of locomotive boiler explosion.
Belpaire firebox
Usually the top of the boiler (wrapping sheet) above the fire box is radial to adjust the contour of the boiler; However, due to placement problems fixed at right angles to the wrapping sheet and crown sheets (see above), the Belpaire fire box was developed. In the Belpaire design, the wrapping sheet is approximately parallel to the firebox sheet to allow for better placement. This arrangement gives the tip of the top of the boiler to more square shapes and is usually made as large as possible in the loading meter, to offer the largest heating surface where the fires are the hottest. The most famous user of the Belpaire fire box in the United States is the Pennsylvania Railroad. Other trains, such as Great Northern and Illinois Central, have locomotives with Belpire Belpaire. Illinois Central 4-6-0 # 382, ​​â € <â €
The Wootten firebox is very high and wide to allow the burning of anthracite coal waste. Its size requires unusual crew placement, for example camelback locomotive.
Burn room
Some fire boxes are equipped with so-called combustion chambers that place additional space between fire and rear smoke sheets. This enables more complete combustion and increases the surface area of ​​the fire box for greater heat transfer.
Fireman
The role of firefighters in steam locomotives is to ensure drivers have sufficient steam supplies that can be used at any time. This is achieved by maintaining the supply of fuel to the fire, and by maintaining the boiler water level so as to cover the crown sheet at any time - otherwise the latter will become too hot and weak, and boiler explosion can occur. At the terminal after the day's work is completed, the firefighter will fill the kettle with water and either bank or fire (ie extinguish the fire), in accordance with company policy, and disconnect the driver's wheel to prevent locomotives from moving while not maintained.
Gallery
Maps Firebox (steam engine)
Locomotive road locomotive
Road locomotives, such as traction machines, usually have a fire box similar to a railroad locomotive but there are exceptions, eg. steam waggon Sentinel which has a vertical water tube boiler.
Stationary boiler firebox
There are, and many different designs of fire boxes for stationary boilers. In a flue type boiler (eg the Lancashire boiler) flue itself forms a fire box. In a water-tube boiler, the fire box is usually a brick compartment under a water canister.
Boiler marine boiler
In the marine boiler there are also various types of fire boxes. The main difference is, again, between the type of fire tube (eg the Scotch boiler, with internal fire box) and the type of water tube (eg the Yarrow boiler, with an external fire box).
See also
- Firetube boiler
- Remove
- Fusible plugs
References
Source of the article : Wikipedia
0 Comments