In stationary steam engines typically used for pumping water, driving. Valve gear definition of valve gear by merriamwebster. Zoom right into the valve gear to see the detail and timing methods used by the gear. Allan wallace also has a steam locomotive valve gear simulator and notes on full and scale valve gears. Steam engine valve gear on the computer windows version by charles dockstader hcr 69 box 3111 california valley ca 93453 805 475 2519. Howto update firmware valveindex valve developer community. Southern valve gear was popular on steam locomotives in the united states. The baker gear contains a fourbar linkage as one of its parts. Were seeking collaborators who are the best at what they do.
Any content you bought on steam for your htc vive, htc vive pro, oculus rift, or windows mixed reality headsets will work with the valve index and vice versa. The steam diagram defines the potential output and efficiency of the engine. Uninstall steam how tos knowledge base steam support. The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to escape, respectively, at the correct points in the cycle. Browse vr titles for valve index, htc vive, oculus rift, windows mixed reality, and other steamvrcompatible headsets. Results exclude some products based on your preferences.
Two are recommended on each boiler and are installed without shut off valves from the boiler. At right are the zip files containing all the program elements. The programs cover just about all the valve gears in common use, and can be used for the design or analysis of steam engine valve gear. As always, steam is hardware agnostic we dont believe your content should be locked to your headset. The exacting design and manufacturing of our quarterturn, rotary, linear, control and specialty valves result in reliable performance, extended service life, and safe operation in a wide range of applications and. Jun 26, 2017 valve gear valve gear is the mechanism used to move the valve system that opens and closes the inlet and exhaust ports that let steam into and out of a locomotives cylinders. Charlie dockstader jamie foster of colorado springs, colorado. Stephenson gear was invented first, and it is perhaps the first fullfunction valve gear offering not only forward and reverse but also a range of steam cutoffs during the piston stroke. Southern valve gear was devised by locomotive designers on the southern railway and used on many locomotives on that line. The mechanism is usually connected a steam engine s valves, and was often used in early locomotives. Algodoo steam engine with baker valve gear youtube. Valve gear on a steam locomotive is used to control the admission of steam into the. An approximate, but logical, method of designing walschaerts. There are other valve gear analysis tools available.
Stephenson valve gear most common valve gear in the 19th century, normally inside the locomotive frame. Don ashtons site devoted to steam locomotive valve gears and their design, kinematics and distribution problems, particularly for walschaerts and stephensons gears. Steamvr supports the valve index, htc vive, oculus rift, windows mixed reality headsets, and others. The longer valve travel was connected with super power engines, as it allowed larger steam openings in the valve bushings, making the steam flow more efficient. Charlie has put this program in the public domain but is not to be sold.
Steamvr supports the valve index, htc vive, oculus. Control valves and controllers automatically maintain pressure, temperature, etc. Steam is an online windows, mac, and linux game store run by valve software, the makers of the halflife, counterstrike, dota 2, and left 4 dead games. Starting today, you can use steam to purchase software other than games, though at. These open and close various passages as required to permit admission and exhaust. In the lefthand column of your registry editor, navigate to. Steamvr is the ultimate tool for experiencing vr content on the hardware of your choice. Most valve gear designs provide it, the exception being early stephenson valve gear.
Cutoff, usually quoted as a percentage, is the point in the piston stroke at which the supply of steam to the cylinder is cut off by the closing of the valve. The gear is sometimes named without the final s, since it. Valve events can be more accurately determined by iterative computer programs such as. Since then i have made continuous additions and improvements to add other types of valve gear and improve functionality and ease of use. Steam engines used in boats and ships operate under a constant, unvarying load through the propeller and so have a fixed cutoff, with speed being controlled through the regulator. Service sheet 04 slipeccentric valve gear valve timing adjustment on early roundhouse locomotives. Windows 7x64, windows 8x64 64bit os required processor. Open 247, the valve store is your source for swagalicious apparel, posters, books, and collectibles for all your favorite valve games. Here you can see, graphically, the resultant changes in steam flow and therefore engine performance caused by variations in valve gear geometry, angle of advance, and valve lap. Dockstader graciously made the software available to future generations by placing it in the public domain as. For those that would like to study how valve the valves of a stanley engine function this program is highly recommended.
Promotional items can be gained from other vr games. Valve gear definition is any of numerous gears by which motion is given to the valves of an engine and especially a steam engine. James valve gear 1832, used first by baltimore and ohio railroad, united states. Apr 10, 2010 steam engines used in boats and ships operate under a constant, unvarying load through the propeller and so have a fixed cutoff, with speed being controlled through the regulator. Valve gear definition of valve gear by the free dictionary. Steam engine valve gear on the computer by charles dockstader link updated 22 december 2011. Valve launches nongame software on steam slashgear. An effort was made to make the sound the correct speed for the animation. Steam engine valve gear on the computer downloadable freeware simulations of every kind of valve gear youve ever heard of by charles dockstader ca. I have gone around looking at all of the steam engine models at model train shows and noticed a variety of liberties with valve gear, perhaps because the valve gear is a mass of rods, links and levers to the model maker without perhaps having an understanding of what these things do.
The article discusses the mechanical details regarding baker valve gear, as well as influences from the usa which lead to its use on several new zealand steam locomotives. The valve gear also controls the distance that the valve travels across the ports and the time that the ports open and close relative to the stroke of the piston. The video model is taken from beyerpeacocks order 890. The valve operating mechanism often known as the valve gear. He made the software freely available by placing it in the public domain as freeware.
It was used on the overwhelming majority of marine engines. Steam locomotive valve gear trains magazine trains. From a page on which shows detailed animations on how all 5 of the common american valve gear systems work. The reversing lever, or johnson bar, does more than simply provide the reverse function of the valve gear. Charles dockstader has written a program for ms windows which will take the geometry of your valve gear design pretty much every gear type imaginable and show the physical arrangement of the motion, animate the. Tools source 2 toolset includes the hammer level editor, and tools for creating models, materials and particle systems. Chaperone is technology that indicates the boundaries of your play area. Maximum cutoff typically 75% is used for starting a train and is reduced by the operator as the train accelerates to speed. The animations seen on this page were created with software written by. Poppet valve gear cambox and gearbox location front unit rev. Features such as reversing and speed can also be adjusted onthefly. Opportunities at valve run broad and deep across the following areas, where were always hiring for all positions. Don ashtons steam locomotive valve gear treatise on full and scale valve gears, including simulation and setting of model valve gears, is quite useful. Paxman microfilm records suggest the order was for a set of lentz valve gear, not solely a cam chamber.
Roomscale vr gives you the freedom to move around and to gain an entirely new perspective on ingame worlds. One biggie is that the gear is almost almost in neutral. There are not yet enough steam curators to show in this space. The sound will not necessarily synchronize with the animation. It is the developer of the software distribution platform steam and the halflife, counterstrike, portal, day of defeat, team fortress, left 4 dead, and dota series. This link will take you to a page where you can download an amazing free program for your pc. A resource site for those interested in smallscale live steam railroad locomotives as a hobby.
The valve gear of a steam engine is the mechanism that operates the inlet and exhaust valves to admit steam into the cylinder and allow exhaust steam to. Gwr 4 cylinder walschaerts valve gear animation youtube. A history of lentz valve gear on british steam locomotives. By default chaperone displays a grid pattern when you approach the boundary. If you get too close to the real world while in the virtual one, the. Steam locomotive walschaert valve gear animation note. You can also view the valve gear operation with simulated steam and sound.
These records also say it was for an indian state railways 462 locomotive, xs2 type. Apr, 2020 steam is an online windows, mac, and linux game store run by valve software, the makers of the halflife, counterstrike, dota 2, and left 4 dead games. The correct way is shown in the charles dockstader valve gear software program. Control valves, controllers tlv a steam specialist.
Perform and perwal simulation software packages created by prof bill hall and downloadable from this website. Instructions for download and installation the bcwrr is delighted to host charlies valve gear program on its web site. When the baker rod is standard when it controls the locomoitve anywhere. Valve corporation, also known as valve software, is an american video game developer, publisher, and digital distribution company headquartered in bellevue, washington. There are many different designs of valve gear, including the following more commonly used types.
Stephenson valve gear is a convenient arrangement for any engine that needs to reverse and was widely applied to railway locomotives, traction engines, steam car engines and to stationary engines that needed to reverse, such as rollingmill engines. A long near 100% cutoff gives maximum tractive effort for starting or climbing a ruling grade, but it is not energy efficient. In the meantime, click here to read more about steam curators and learn how to become a curator yourself. The walschaerts valve gear is a type of valve gear invented by belgian railway mechanical engineer egide walschaerts in 1844 used to regulate the flow of steam to the pistons in steam engines. Dec 08, 2010 valve gear design simulator software charles dockstader has written a program for ms windows which will take the geometry of your valve gear design pretty much every gear type imaginable and show the physical arrangement of the motion, animate the events, draw an indicator card, etc. Multipurpose control valves and highprecision control valves for steam with a pressure reducing valve as the base. You establish these chaperone boundaries during the setup process by designating the play area with your controllers. The stanley steam engine stephenson valve gear computer simulation program charles dockstader has created an excellent program that simulates the operation of stephenson valve gear action. Industrial sites around the world trust flowserve to provide unmatched control for the most difficult fluid management applications. Steam locomotive valve gear trains magazine trains news.
Steam and water pressure relief valves are offered. This software is a must for any steam or live steam enthusiast fantastic stuff. The vulcan foundry at newtonlewillows received an order in 1928 for two xs2 type engines with lentz valve gear for the north western railway of india. As promised, valve has launched nongame software offerings on steam, albeit a little behind schedule. Providing variable cutoff is an important function of the valve gear. Dec 04, 20 that link another person contributed showing the major types of valve gear has the baker gear.
These programs were never sold, and are not to be sold. Valve gear valve gear is the mechanism used to move the valve system that opens and closes the inlet and exhaust ports that let steam into and out of a locomotives cylinders. The walschaerts valve gear is a type of valve gear invented by belgian railway mechanical engineer egide walschaerts in 1844 used to regulate the flow of steam to the pistons in. It is fitted to 040wt dolgoch, preserved on the talyllyn railway. There is an excellent article regarding baker valve gear in the march, 2003 issue of, new zealand railfan. Such an engine is typically most efficient when the inlet is open for a short time, before it reaches the cutoff point when no more steam goes into the. Mar 29, 2020 a valve gear is a component that controls the intake and exhaust of steam in an engine.
Working as part of valve s core development team, adding features and components to our bestofbreed computer games and pioneering ecommerce platform regularly shipping a variety of products from small internal tools to largescale web applications used by millions of people per month. There is a construction manual i got one on amazon a few months ago to. My profile order history addresses wish list sign out. Principles of steam locomotive valve systems page 3 the valves themselves. The valve gear is there to move the valve over the cylinder ports allowing steam to enter the cylinder at the correct time and then allow it to escape once its job is done. Feb 28, 2010 gwr 4 cylinder walschaerts valve gear animation, as used on the stars, castles and kings. Timing marshall hackworth valve gear the home machinist. In 1986 i wrote the first of the msdos versions of the software to simulate baker valve gear. In early 1999 i started converting one of the valve gears to the windows format. Mar 23, 2019 this is a baker valve gear for a pm 1225, nkp 765 and any locomotives. Please note that this software is neither supported by charles or myself. Can be used for a variety of types of control when combined with a controller. Players can perform tasks assigned by valve to unlock spawnable tools, props and avatar pieces.
The cutoff is set by the cyan color lever which goes first forward and then backward. Steam engine steam cutoff explained engineman wook. Steam relief valves relieve excess boiler steam pressure. The red area represents steam admission and the blue, steam exhaust.