Green Engineering

Green Engineering is the design, commercialization and use of processes and products that are feasible and economical while minimizing:
Generation of pollution at the source and risk to human health and the environment.

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Comment by Andrew Feliks on April 11, 2018 at 12:17am

Does not this remind you of the mechanics drawn by James Watt ? But it's necessary to back 250 years back ..

Hand-drawn diagram by James Watt explaining his discovery of the "parallel motion" in a letter to his Sohn: "The idea originated in this manner. On finding double chains, or racks and sectors, very inconvenient for communicating the motion of the piston-rod to the angulat motion of the working-beam, I set to work to try if I could not contrieve some means of performing the same form motions turning upon centres, and after some time it occured to me that AB, CD, being two equal radii revolving on the centres B and C, and connected together by a rod AD, in moving through arches of certain length, the variations from straight line would be nearly equal and opposite, and that the point E would describe a line nearly straight, and that if for convenice the radius CD was only half of AB, by moving the point E nearer to D, the same would take place; and from this the construction, afterwards called the parallel motion was derived."

Of course, instead of a rope, you can use any type of parallel movement mechanism.

And of course, it's getting higher and higher speed after that ...

So this Wats is not bad anymore .. but this string can have such a form of springs from the watch's bannister .. and then it is the simplest solution and guaranteeing higher revolutions .. obviously the ideal is Peaucellier-Lipkin, but also is the most complicated .. But after some analysis, to which the arms attach to the connecting rod, i.e. which carries the main forces, the rest may not have to be a monstrous size ..
In any case, the use of a traditional crosshead certainly became archaism ... because with the use of any of these solutions, the side force on the crowd does not occur, and was not moved below, to crosshedas, and was liquidated at all ..

Also from my drawing you can see that a very easy way we can do cooling with the water of the piston ..
This can give us, due to its very low temperature, a change to Teflon efflorescence and one would be tempted to completely give up the oil.
And this is a very important matter, which allows us this construction, so it seems to me that maybe you can do practically this matter and try some teflon bearings and seals


Here is the animation of THE PEAUCELLIER-LIPKIN LINKAGE which is automatically downloaded

Normal position engine crosshead Peaucellier-Lipkin :rolleyes:


Comment by Andrew Feliks on April 9, 2018 at 5:42pm

So I continued to divide the hair into four... :D

Yes, we slowly develop this way of bypassing the lateral force of the piston .. here, that's all you have to do is one lever that has a half-ring at the end, but the other way round. This way one pulls up and the other down during the movement of the lever ... It can be used for a full four-stroke engine .. Well, see how easy we can cool the water piston ..


Regards Andrew

Comment by Andrew Feliks on February 24, 2018 at 5:02pm

Well, I can imagine the future development of Feliks Crosshead:


So here is such a nice professional site with such an engine with a variable degree of compression ..
But the crank layout has modes ...

The lateral force of the piston has not been removed, only moved to the side wall ..


Comment by Andrew Feliks on February 18, 2018 at 9:56am

A traditional crosshead, usually unbalanced, to save a little on the construction .. But for this, when the command "whole back" is taken for the ship's engine, only 60% of the power can actually be used, because of this unsymmetrical crosshead, which can not withstand greater load, in the reverse than usual turnover.
In my solution, it does not matter which engine the engine is on, so "the whole back" can actually be "all", i.e. 100% ..

But in my solution, it may be asymmetrically, for the same reason as in the traditional one, it means that the piston is pressed down all the time, if not by the work stroke, then by the compression stroke ... (of course, it is 2 stroke ) .. Therefore, the second lower frame, can be "symbolic" and the thin line, just to keep the kinematic bond in some abnormal situations.
Of course, all this new mechanism can be in a separate housing, separating the oiled space, from the space under the piston, which can be cooled water ..
Developing further ideas for smaller engines, instead of a rope, we can use a toothed belt, whose durability is known from the mechanisms of timing .. :D But the revolutions can be a little bigger ..


[img][/img] Here is a handbook, but it is very long uploading, because 35 MB .. On the 74 page, such a two-stroke engine, whose piston pin, is a ball, which moves only pressure from above in a pristine way ..



Comment by Andrew Feliks on February 18, 2018 at 9:53am
Comment by Andrew Feliks on February 18, 2018 at 9:53am

Here is a textbook of a young handyman..

Now he will describe how we can change the crankshaft pitch in relation to the piston stroke and what it can give us in Feliks Crosshead .



Comment by Andrew Feliks on February 18, 2018 at 9:51am

Here all the forces in the crank mechanism ... Reduction in the stroke of the shaft twice reducing, with the same stroke of the piston causes a large increase in efficiency, by reducing the forces of inertia. Also the force Nm sometimes reaches up to 30% of gas force , which can be seen in the charts.

When it does not exist at all, the average efficiency of these 10 to 15% of the engine will be higher. only because of its lack ..

Adding a fall in the shaft stroke by 50% from the inertia forces, even the next 10% increase in efficiency will be able to achieve ... in total, some 25% efficiency will be better ...


Comment by Andrew Feliks on February 18, 2018 at 9:51am

we lost forge Nm

Okay, yes, do we continue to develop ideas ...
here one of the advantages: the possibility of completely separating the piston chamber, from the crankshaft chamber and main connecting rod .. This causes that the oil used for lubricating the shaft will not be contaminated with combustion products. He is in a clean state ... As someone will want to lubricate the piston with oil, it can use a different oil for this purpose.
However, I think that Teflon will fulfill its role ......



Comment by Andrew Feliks on February 18, 2018 at 9:49am

What if you made Teflon so much ?
And maybe in diesel it would be enough to lubricate them with fuel ?

And the rolling bearings on the crank with the grease in the middle ?

This ... the engine could have been WITHOUT lubricating oil.

Just what would Castrol say ?

:smoking: :smoking:

Or maybe a carbon fiber line ?

Comment by Andrew Feliks on February 18, 2018 at 9:49am

Well, there is one big advantage of such a crosshead. We can freely change the stroke, piston in relation to the crankshaft stroke .. For example, the stroke of the piston is the same, and the crankshaft stroke even twice as long .. Everything will depend on the demand, and what is most important in a given engine application ..
Of course, the rope has to go exactly in the axis of the piston ..

So that his way of placing the crankshaft, as you can see in the figure, from the side, will make the engine will be much lower ..
Of course, only for marine engines 102 rpm





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