converting Froude FO209 water brake  

Page 1 / 2
  RSS
 Udo
(@udo)
Member

Hello,

I am Udo fink from germany, I working since 35 years with motors and have a Froude dyno that i use 2-3 times per year to brake in engines that I build for me ore frends. The Dyno is an froude F0209 and this is a rock solid constriction made for industrial use. I got them 25 yars ago with much luck from a Team that have develop the Group C XJ220 Jaguar on that dyno. The steering complete analoge and I get often trubble with that. Normal I replace all IC and Transistors anf after that it work for the next two years . But now tthat is not working anymore and it is time to replace. The outlet valve was controlled by an hydraulic actor and should be replace with an stepper motor.

Here I need your help, how can I calculate the force that needed to operate the throttel blade style valve ?

Thenks for your help. I will post pictures from the convertion so maybe others can use the expiriance from that project

 

 

This topic was modified 1 month ago by Udo
Quote
Posted : 15/12/2019 10:09 am
 Udo
(@udo)
Member

I removed hydraulic actor and with water on it is very easy to turn valve by hand

No great force.

What stepper motor you recomend?

 

ReplyQuote
Posted : 15/12/2019 1:05 pm
(@admin)
Member Admin

Udo, Will you be able to measure the torque with the water pressure on? 

ReplyQuote
Posted : 15/12/2019 2:21 pm
 Udo
(@udo)
Member

I messure tork with an small torke adjuster theat I normal use for bearing praload.

8N/cm was need to turn with water on

ReplyQuote
Posted : 15/12/2019 5:52 pm
 Udo
(@udo)
Member
 Udo
(@udo)
Member
(@admin)
Member Admin

Hi,

Both motors are strong. The 23ssm8442 has feedback. Feedback is not needed in a perfectly tuned setup (speed and acceleration and torque), we run without it. But can be nice, in particular if you are unsure about the setup. 

ReplyQuote
Posted : 15/12/2019 7:33 pm
(@mach_1)
Member

Welcome to the forum Udo , can you please post a picture of the ID_tag of your  froude F0209 dynamometer ? Would greatly appreciate it.

ReplyQuote
Posted : 16/12/2019 10:19 am
(@mach_1)
Member

Never seen those numbers in a h&f F series dyno. Are you sures it is a F249 maybe ?????

ReplyQuote
Posted : 16/12/2019 10:33 am
 Udo
(@udo)
Member

No it is a F209 I will take pictures later

 

 

ReplyQuote
Posted : 16/12/2019 3:26 pm
 Udo
(@udo)
Member

So I got the stepper motor and controller and will install it next days

Here a few pics from the dyno and hydraulic controller that I will replace

This post was modified 3 weeks ago by Udo
ReplyQuote
Posted : 04/01/2020 11:02 am
(@mach_1)
Member

Hi Udo , Nice my first time I have seen a Froude F0209 engine brake dynamometer ID_tag , this is a high speed 750Kw (1005Bhp)@7,000/16,000 RPM engine dyno. Is it possible to get more pictures of the whole Froude F0209 engine brake dynamometer from many angles please plus the remote control panel and hydraulic pump system?

What engines have you been testing on this Froude F0209 engine brake dynamometer ? Can you share the Bhp@RPM you have been testing them at ?

On your Froude F0209 engine brake dynamometer the water is controlled on the outlet, I'm only going on the picture you posted ???? only? or both inlet and outlet ? 

I have a couple of H&F G-series engine hydraulic dynamometer models, one  GB4 and  a G490EH and a  friend of mine has a F246.

I'm converting a H&F GB4 engine hydraulic dynamometer. 

I love the sound and the speed the G490EH is controlled on this youtube clip which I have already posted on this forum. Look at the tacho ! and look at the water inlet stepper motor size and gear arrangement.

https://www.youtube.com/watch?v=mG2Q48l2V7A

https://www.youtube.com/watch?v=nM6-2ROEDq0

 

F-Series Hydraulic Dynamometer Models
Model = F24 , rating Max Speed (RPM)= 9,000 , Torque Nm (lb.ft) = 2,700 (1,990) , Power kW (BHP) = 750 (1,010)
Model = F246 , rating Max Speed (RPM) = 9,000  Torque Nm (lb.ft) = 2,700 (1,990) ,  Power kW (BHP) = 750 (1,010)
Model = F246FRR , rating Max Speed (RPM) = 11,000  Torque Nm (lb.ft) = 2,000 (1,480) ,  Power kW (BHP) = 750 (1,010)
Model = F249  rating Max Speed (RPM) = 16,000  Torque Nm (lb.ft) = 1,270 (940) , Power kW (BHP) = 750 (1,010)
F-Series Hydraulic Dynamometer Models
KEY to Model Letter Designations:
R= Reversible,
D= Dual Compartment,
AV= Axial Vane (bi-directional),
GT= Gas Turbine,
FRR= Fixed Return Ring
KEY to Numeric:
F359: 35 = rotor size (cm),
9 = 90° crop on rotor
 
 
 
ReplyQuote
Posted : 05/01/2020 5:30 am
 Udo
(@udo)
Member

it is controlled only beý outlet.

The control unit ist there and I can made pictures. I have all factory paperwork for it.

I not use it often and in the past I have many problems with the controll unit. Somtimes when I switch them on it have peaks and the gauges not working. then I cange any small IC and after that it work for a while but lat time during a test the controller went off and motor rev up I was just fast enough to get throttle off before overrev. There is some defect in the controller board and I will switch to YouDyno because it is the most economy way.

Most Motor I do are V8 in the 150-800HP range so the roped rotor is not the best for my use the motors can only brake down to 3000-3500rpm

 

 
 
This post was modified 3 weeks ago 5 times by Udo
ReplyQuote
Posted : 06/01/2020 9:24 pm
(@admin)
Member Admin

Udo, it is interesting that it has the control valve only on the outlet, I believe it is more common to have the control valve on the inlet + a manual valve on the outlet. Some dynos have controlled valves both input and output that go opposite of each other, this gives faster response. 

 

ReplyQuote
Posted : 06/01/2020 9:57 pm
(@mach_1)
Member
Yes Udo your froude f0209 has a 
cropped rotor ends.  I'm actaully suprised that the
dyno loads up at 3000 to 3500 RPM ... I'm only going
of you ID_Tag information but the working range is
7000rpm to 16.000rpm.

Can you look in the froude f209
workshop manual ans see if
there is a torque power curve
operating graph and post a
picture of it please?

Yes He can tap into the inlet
side plus have a electric or
manual valve operating on the
oulet side to adkust sensitivity
for all different engine
torque &RPM curves but
control water inlet with
yourdyno controller.


This post was modified 3 weeks ago by Mach_1
ReplyQuote
Posted : 06/01/2020 11:55 pm
Page 1 / 2
Share:
Select your currency
NOK Norwegian krone
EUR Euro
  
Working

Please Login or Register