Other Steam Engines

Connect to the Kimmel Steam Power Website, scroll down to the steam engines that are not in the Kimmel Steam Engine Collection under the name: Other Engines, Boilers, Generators or Parts:
 http://kimmelsteam.com/engines.html

 

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5 Responses to Other Steam Engines

  1. Robert Green says:

    Critique of the Green Steam Engine™

    I saw your critique of my engine and I would like to make the following remarks. I feel that the critique is unfair because it only shows the engine that I offer for people who can not purchase the industrial version. It is a cheap alternative and a home-shop project. It is not representative of the engine that I sell and offer for license. The engine that I sell is a professional/ industrial version that is entirely different. You can see the professional version on my website at: http://www.greensteamengine.com I feel that your presentation is biased and is meant to denigrate my design. At best, the writer does not understand the engine design.
    The critique mentions that heat will be lost in the transfer of steam through the cylinder tubes. This is not the case on the industrial version and even if it were true, this is small compared to the massive heat sink of the old cast iron block engines.
    Another issue is the wear of the ball joints that the writer claims will need a lot of lubrication. In fact, they do not need any lubrication because the amount of movement is very small, the cylinders rotate slowly when running so the wear is even and is constantly polishing the ball fitting to a perfect fit. Any wear only moves the cylinder back by minute amounts. It does not impair or degrade the connection. The industrial engines have teflon inserts that are self-lubricating but are over engineered and not really needed.
    If one wishes to talk about lubrication, my engine does not need lubrication injected into the steam or does it need oil or grease fittings and constant maintenance as the old engines do. It has straight-line movement of the pistons and does not have side forces that wear out the cylinders. The bell crank engine forces the pistons against the sides of the cylinders twice per stroke. The angle of the piston rods cause a wide degree of angular force from the top to the bottom of the stroke. The crosshead versions also need substantial lubrication and injected oil because of the considerable friction on the pistons and crosshead.
    A straight-line drive in my engine takes out that angular force acting on the piston and cylinder and moves it to a harmless part of the mechanism. This allows the piston to be a lightweight disk that requires only saturated steam as the lubricant and O-rings for seals. These seals can be changed out in a few minutes with only a allen wrench. The piston rods, because they have no angular force, can be just as lightweight because the force is straight compression. The lighter reciprocating mass allows for less energy loss for reversing direction.
    My engine can recycle the condensed steam without having to separate out the oil. My engine has a fraction of the friction, is many times lighter weight, has fewer parts, fewer bearings and eliminates the entire block of the engine to allow full disassembly for maintenance in minutes. This engine will freewheel on two pounds of steam pressure compared to at least 15 lbs required for these other engines.
    My engines do not need flywheels and they are self-starting and reversible with one simple valve. My engine does not have compression at the end of the stroke. The valves stay fully open from the beginning to the end of the stroke for easy evacuation of the exhaust and full pressure at the start of the power stroke. The valve ports on my engine can be enlarged to any size and the valve is directly connected to the cylinder. There is no heat loss because the ports are separated. All of the bearings are sealed and do not need to be lubricated. Adjustable early shutoff requires no additional mechanism.
    The cost of my engine is a fraction of any other engine shown. It can be scaled from micro engines to massive utility size with simple arithmetic and geometry. One simple formula is all that is required to scale the engine. There are no large castings, and very few machined parts. There are many different configurations to choose from to give different performance and footprint selections. The larger engines use the “Z” drive to eliminate the oscillation. The “flex rod” is the most economical of any engine ever built. The engine can be made as an installation even without a frame. The cylinders can be incorporated as part of another structure.
    This is truly a modern engine with improvement that are long overdue. I am looking to bring steam engine into the future where they belong.
    Robert Green
    (949) 581 2529

    • tkimmel3 says:

      We are all entitled to our opinions and it is much easier to comment about general steam engine design than it is to be specific about someone’s commercial product. There are legal issues involved. I will write at some length in the future as I am studying Patent No. 8 096 787 which is amazingly well-illustrated. Most patent applications do not disclose actual information as this one does. I will comment about one aspect of this engine, the claim to not need lubricating oil in the steam line. We have all aspired to operate a steam engine without the oil and water mixing problem. This engine does not have an oil filled crankcase so there is no problem with steam leaking past the rings and getting into the crankcase. On the other hand, the only way to avoid lubrication is to either go with exotic materials such as carbon or ceramics, or to run saturated steam. Saturated steam is notoriously inefficient because of the condensation of steam in the cylinder as it expands. When a person designs a steam engine to use saturated steam, this is not any kind of an advance in modern steam engine design. It is a regression to about 150 years ago, although it is a convenience, except for using twice as much fuel to make the same amount of power. I have just enough time today to comment on the sidethrust of a conventional steam engine, either double acting with a cross head or single acting with a trunk piston as needing injected lubrication. The double acting engine with a crosshead needs lubrication of the crosshead, however, that does not involve injected oil into the steam line because this whole crosshead mechanism is on the outside of the steam area; it is below the packing where the piston rod slides into the cylinder. Oil used to lubricate this crosshead does not contaminate the steam and the crosshead lines the piston up to slide straight in and out of the cylinder without any side thrust. We can discuss at a later date how critical the sidethrust issues is in this type of a mechanism and how that compares to the complexity of having a ball joint. Later for more. I welcome any discussion of any aspect of the steam business. It is important. Tom Kimmel

      • robert green says:

        Tom, I wanted to send a copy of my e-book “Steam Age Machines” for you to look at. It has some archival etchings that may interest you. Regards, Robert Green

  2. Robert Green says:

    Tom,
    Thanks for your generous reply. On the issue of saturated steam- what else can you use in a domesticated environment? Where are you allowed to use super-heated steam in a home setting?
    Even with a cross head, there are side forces that create friction as well as the piston rod seals. These types of engines typically have compression at the end of the stroke as well. That has been completely eliminated in my engine. The ball joint allows the pistons to rotate slowly and equalize any wear. The movement is so small that there is virtually no wear and it causes no friction. The force is always against the ball joint on both the power and the exhaust stroke. So there is always a good seal because it is self sealing and any wear enhances the seal.
    Robert Green

  3. Joe Best says:

    Good morning Tom, I hope this message finds you well. I am an engineering student at Old Dominion University. I am currently working on a prototype steam engine for my senior project and I am very fascinated with Bill Ryans “Hot Head” steam engine. I would like to learn more about the injection system and feedwater pump he is using on his go kart. Would you be able to put me in contact with Bill or have additional information on his engine? I have tried contacting SACA, but have had no luck with their website. Thank you for your time and help.

    Joe Best
    (757) 419-8408
    jbest008@odu.edu

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