MPRBC 's Final Design step 47 / 50
An intake pipe (in pink) is placed on the large radius of the gas exchange face.
Machine controlled beating in rotary piston (MPRBC)
- Pascal HA PHAM
- Grand Econologue
- posts: 1461
- Registration: 30/01/06, 14:56
- Location: sun
- x 25
multilobage
Hello Raymond,
I come back to "multilobage" as mentioned in your patent and in your discussion from pages 2/3:
when the number of lobes of the rotating cam increases, the number of beats per piston increases in the same proportions for each revolution of cam,
So for a given output shaft speed there is a corresponding frequency of piston beats:
according to you what would be the optimal configuration in terms of lobe number:
if nb is large the torque should be very strong but the max speed of rotation of the output shaft more limited?
that's right...?
what are the reversibility criteria when it is the axis that causes the piston to beat (pump / compressor operation for example) ...
Here are my questions of the day ...
A+
Pascal
I come back to "multilobage" as mentioned in your patent and in your discussion from pages 2/3:
when the number of lobes of the rotating cam increases, the number of beats per piston increases in the same proportions for each revolution of cam,
So for a given output shaft speed there is a corresponding frequency of piston beats:
according to you what would be the optimal configuration in terms of lobe number:
if nb is large the torque should be very strong but the max speed of rotation of the output shaft more limited?
that's right...?
what are the reversibility criteria when it is the axis that causes the piston to beat (pump / compressor operation for example) ...
Here are my questions of the day ...
A+
Pascal
Last edited by Pascal HA PHAM the 13 / 04 / 10, 07: 03, 1 edited once.
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All around my work, full videos on the web:
https://www.google.fr/webhp?source=sear ... 80&bih=672
https://www.google.fr/webhp?source=sear ... 80&bih=672
Good evening Pascal,
Well, you're asking great questions ...
MPRBCs have N pairs of pistons and basically need an N-lobes cam.
But we can also Overmind the cams to force the MPRBC to cycle more than once on a single cam, and therefore deliver more power for the same turn of this tree.
Here is a M3PRBC: 3 Pistons for Trilobed Cam
To better understand the overlay, let's look at the simplest case :an M1PRBC (1 single pair of rotary pistons with controlled flapping)
here is basic monolobed cam
Here is a heptabobée cam (overmixing of an 7 factor)
That requires 7 times more beats to make a turn than the monolobed cam.
So of course, when multiplying the lobes, we change the cam / roller pressure angles, and we can fall into irreversibility if we want to operate the rotary pistons via the cam (but never the opposite).
However, this aspect is possibly interesting: for example for a compressed air winch, a rupture of the air supply will be automatically secured by spontaneous locking of the rollers in the recesses of the cam.
here is for example an irreversible POGDC by strong overmultilobage
In practice, by radially deporting the rollers, it is always possible to adjust the cam / roller pressure angles, even in the event of a major overwound, as here with an M4PRBC overloaded with an 3 factor (ie 3 x 4 = 12 lobes)
So to be synthetic:
* there is nooptimum in lobes that relative to the chosen application.
* given pneumatic motor power, overloaded leads to lowering the speed of rotation and increasing the torque, and possibly without a gearbox (the power will then be modulated by the flow, therefore the speed pistons)
* Overmultilobage drastically increases the compactness of the motor : maximize the fresh air sucked in from the first ever rotating shaft by the engine.
More details can be found on the page "MPRBC motion conversion"
See you soon.
Well, you're asking great questions ...
MPRBCs have N pairs of pistons and basically need an N-lobes cam.
But we can also Overmind the cams to force the MPRBC to cycle more than once on a single cam, and therefore deliver more power for the same turn of this tree.
Here is a M3PRBC: 3 Pistons for Trilobed Cam
To better understand the overlay, let's look at the simplest case :an M1PRBC (1 single pair of rotary pistons with controlled flapping)
here is basic monolobed cam
Here is a heptabobée cam (overmixing of an 7 factor)
That requires 7 times more beats to make a turn than the monolobed cam.
So of course, when multiplying the lobes, we change the cam / roller pressure angles, and we can fall into irreversibility if we want to operate the rotary pistons via the cam (but never the opposite).
However, this aspect is possibly interesting: for example for a compressed air winch, a rupture of the air supply will be automatically secured by spontaneous locking of the rollers in the recesses of the cam.
here is for example an irreversible POGDC by strong overmultilobage
In practice, by radially deporting the rollers, it is always possible to adjust the cam / roller pressure angles, even in the event of a major overwound, as here with an M4PRBC overloaded with an 3 factor (ie 3 x 4 = 12 lobes)
So to be synthetic:
* there is nooptimum in lobes that relative to the chosen application.
* given pneumatic motor power, overloaded leads to lowering the speed of rotation and increasing the torque, and possibly without a gearbox (the power will then be modulated by the flow, therefore the speed pistons)
* Overmultilobage drastically increases the compactness of the motor : maximize the fresh air sucked in from the first ever rotating shaft by the engine.
More details can be found on the page "MPRBC motion conversion"
See you soon.
0 x
MPRBC 's Final Design step 49 / 50
4 exhaust elbows were added.
Again, we could also consider a collector connected to 4 locations that appear.
Putting a gas recirculation through an EGR valve would be very easy too since fresh air and flue gases come out on the same face of the engine.
Also note the 4 blue pipes perimeter on the crankcase. These are the 4 coolant inlets ...
4 exhaust elbows were added.
Again, we could also consider a collector connected to 4 locations that appear.
Putting a gas recirculation through an EGR valve would be very easy too since fresh air and flue gases come out on the same face of the engine.
Also note the 4 blue pipes perimeter on the crankcase. These are the 4 coolant inlets ...
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MPRBC 's Final Design step 50 / 50
Here is a broken view of the engine where we can see most of the organs of the MPRBC.
We understand in particular the flow of cooling fluid into the housing, by successive round trips.
The color of the fluid turns from blue to red through orange to indicate where the fresh fluid is injected and where the heated fluid flows.
Of course, finned air cooling is an alternative.
This closes the publication of the Final Design. I hope everyone was able to enjoy it.
See you later friends.
Here is a broken view of the engine where we can see most of the organs of the MPRBC.
We understand in particular the flow of cooling fluid into the housing, by successive round trips.
The color of the fluid turns from blue to red through orange to indicate where the fresh fluid is injected and where the heated fluid flows.
Of course, finned air cooling is an alternative.
This closes the publication of the Final Design. I hope everyone was able to enjoy it.
See you later friends.
Last edited by Remundo the 14 / 04 / 10, 20: 02, 1 edited once.
0 x
- Pascal HA PHAM
- Grand Econologue
- posts: 1461
- Registration: 30/01/06, 14:56
- Location: sun
- x 25
global animation exploded
Hello Raymond,
wonderful concept that this MPRBC.
Can you give a global animation of your beautiful object
go raymond ... please!
the next step :
for the achievements and development of a thermal prototype, you will need the experience of an experienced engine builder who is not afraid of the unknown ....
hey, I have my idea!
A+
Regards
Pascal
wonderful concept that this MPRBC.
Can you give a global animation of your beautiful object
go raymond ... please!
the next step :
for the achievements and development of a thermal prototype, you will need the experience of an experienced engine builder who is not afraid of the unknown ....
hey, I have my idea!
A+
Regards
Pascal
0 x
Rotary piston machine with controlled flapping
Hello Remundo.
Congratulations on this machine. I wish you to make it work as quickly as possible.
Looking quickly at the last boards, I wondered how will you master the t ° of the pistons in the case of a thermal version?
They will be subject to strong t ° on both sides while on a classic engine we take advantage of the face inf. to evacuate calories.
JLG
Congratulations on this machine. I wish you to make it work as quickly as possible.
Looking quickly at the last boards, I wondered how will you master the t ° of the pistons in the case of a thermal version?
They will be subject to strong t ° on both sides while on a classic engine we take advantage of the face inf. to evacuate calories.
JLG
0 x
Hi AXEAU,
First of all, thank you for your encouragement.
The cooling of a MPRBC is not a problem with the following design (eg water circulation)
http://sycomoreen.free.fr/imgs/MPRBC_re ... nt_eau.JPG
It can also be cooled by the center if necessary with the crankcase oil.
First of all, thank you for your encouragement.
The cooling of a MPRBC is not a problem with the following design (eg water circulation)
http://sycomoreen.free.fr/imgs/MPRBC_re ... nt_eau.JPG
It can also be cooled by the center if necessary with the crankcase oil.
0 x
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