You could measure the flow feeding the chipper to see exactly where you are at. you run it 10 seconds and do the math for one minute.(so you run nothing dry) Two flow limiters can be mounted in parallel ? If i understand correctly the main pump is pumping against a lot of resistance,because a flow restriction occurs somewhere,so it becomes pressure,and the pump is figthing it,heating up oil. Allowing more oil flow return to the tank ,with two flow limiters instead of one,could reduce this flow resistance,so heat.
1. try installing the oil cooler on the return 2. check if there is any major narrowing of the diameters in the hydraulic lines or fittings 3. can apply a hydraulic pressure divider on the power supply with one output on the chipper and the other on the tank in the tractor Good luck!! ps. I see that you use the machines of Polish brands such as "Metalfach" or "famarol" What is your opinion about them? I am Polish and it's nice to see somebody using Polish products in Finland
Would thicker hydraulic oil help? (42 or something like that) Maybe to thick for your winters but better for this job. I’m not sure if you have a flow control on the chipper but I don’t think you need two. The chipper should be able to handle the oil flow from the Belarus I would think, if it was made for a tractor that size they would know approximately what kind of oil flow they can provide. Perhaps just a free flow return back to the tank from the chipper would help
You are right. I am also disappointed that the hydraulic is not adequately sized on the chipper. It not like I could run it with 20kw small tractor - you need a big tractor and that will set the standard for hydraulics. Now I have to spend my time to figure it out. Frustrating - but I can make videos out of it :)
Looking on the tractor data website they say an MTZ 82 (I think that’s your tractor) can give 50 litres/min of flow at 160 bar. That should be fine for your 1/2” pipe work. Thinking again I wonder if you need a higher capacity motor so you can run the valve wider without it running faster, this should give you more torque and less oil shearing (and with it cooler oil) by the valve being almost closed to keep the speed down
A have installed a bigger hydraulic pump for the loader to work normally. Hydraulic pump: www.jihostroj.com, pump q2-51r-b01d20-ss09s08-v (replacement for NZ-50): Actual displacement 51.44 cm3 Rotation speed 350 - 2500 min-1 Pressure at outlet (max. continuous) 270 bar Nominal flow rate 71.8 dm3.min-1 Nominal input power (max.) 40.8 kW
I think you have to put a oil cooler in the low pressure line and a bigest oil tank. Maybe a oil pump / tank, ... on the chipper is better. Here in france, we have on separate hydraulic system on wood splitting machine, for not overheating the hydraulic system of the tractor.
inetesting problem belarus is like that, thay haw masiv flow pump, and what tipe of oil in tractor hidraulik sistem you put im Usually put 10w40 mineral oil and i dont haw a problem
Did you set the extra flow control valve to the minimum? The manual says the chipper can handle between 5 to 20 liters per min. You have an huge pump so I think you need to set it to minimum that the flow control can handle. I'm actually wondering if the tractor's remotes can handle the higher flow pump you have.
I've been running some math to check the flow. I'm not sure what engine RPM you have when running a 1000 RPM at the PTO. But let's say it's 2000 RPMS on the engine, the pump will produce 102 l/min. That's a lot even for the 1/2" hydraulic lines. The last video you mentioned about using the power steering pump and I think it's the best option right now. Or get a small hydraulic pump running directly from the Chipper with it's own hydraulic system integrated.
Engine is running between 1500-2000 RPM I guess. If I set the extra flow control valve to minimum I will loose power at the chipper motor. So it has to be a little bit open - and when the oil heated up even more open. I really need the power on the feed roller so it can shift all the wood in with power. Running it from the steering hydraulics is one option. It's maybe easier to build than complete hydraulic system for the chipper. Another way is to find a suitable flow control valve that can handle say 120l/min flow and run big 3/4 - 1" lines - but I have my doubts because I only have ~20L of hydraulic oil in the tank and I am quite sure it will heat up at some point and like you said tractor's remotes will start to suffer - I have been looking for alternatives but it's not very easy to find a nice distributor with all the features and price-tag I would like.
I would go with the independent hydraulic pump for the chipper, a small reservoir and the valves you already have. Does the chipper have any spare pulley you could use? Seems like they do it this way in the Gt model of this chipper. A small 7 to 10 cubic centimeter pump should be enough.
You use a Gear pump? Look for Variable displacement pump..Variable displacement pump+oil cooler+bigger hydraulic oil tank..I dont know if you use 42 oil or 68 oil in the tractor.
but if at first the chipper works well it means that the revolution is the engine and oil pressures are correct What motivates the chipper to fail after a while? if the hydraulic is heated and becomes more fluid, not enough pressure in bars. but I still see it very strange
Супермашина!!!! Наше правительство бы туда. Вперед ногами.
You could measure the flow feeding the chipper to see exactly where you are at. you run it 10 seconds and do the math for one minute.(so you run nothing dry)
Two flow limiters can be mounted in parallel ?
If i understand correctly the main pump is pumping against a lot of resistance,because a flow restriction occurs somewhere,so it becomes pressure,and the pump is figthing it,heating up oil.
Allowing more oil flow return to the tank ,with two flow limiters instead of one,could reduce this flow resistance,so heat.
1. try installing the oil cooler on the return
2. check if there is any major narrowing of the diameters in the hydraulic lines or fittings
3. can apply a hydraulic pressure divider on the power supply with one output on the chipper and the other on the tank in the tractor
Good luck!!
ps.
I see that you use the machines of Polish brands such as "Metalfach" or "famarol"
What is your opinion about them? I am Polish and it's nice to see somebody using Polish products in Finland
excuse me!
It was only in other films that I noticed that you are from Estonia not from Finland.
Would thicker hydraulic oil help? (42 or something like that) Maybe to thick for your winters but better for this job. I’m not sure if you have a flow control on the chipper but I don’t think you need two. The chipper should be able to handle the oil flow from the Belarus I would think, if it was made for a tractor that size they would know approximately what kind of oil flow they can provide. Perhaps just a free flow return back to the tank from the chipper would help
You are right. I am also disappointed that the hydraulic is not adequately sized on the chipper. It not like I could run it with 20kw small tractor - you need a big tractor and that will set the standard for hydraulics. Now I have to spend my time to figure it out. Frustrating - but I can make videos out of it :)
Looking on the tractor data website they say an MTZ 82 (I think that’s your tractor) can give 50 litres/min of flow at 160 bar. That should be fine for your 1/2” pipe work. Thinking again I wonder if you need a higher capacity motor so you can run the valve wider without it running faster, this should give you more torque and less oil shearing (and with it cooler oil) by the valve being almost closed to keep the speed down
A have installed a bigger hydraulic pump for the loader to work normally.
Hydraulic pump:
www.jihostroj.com, pump q2-51r-b01d20-ss09s08-v (replacement for NZ-50):
Actual displacement 51.44 cm3
Rotation speed 350 - 2500 min-1
Pressure at outlet (max. continuous) 270 bar
Nominal flow rate 71.8 dm3.min-1
Nominal input power (max.) 40.8 kW
I remember now, I still think the pipe work would be fine. I bet the problem is with the motor size/cc
I think you have to put a oil cooler in the low pressure line and a bigest oil tank.
Maybe a oil pump / tank, ... on the chipper is better.
Here in france, we have on separate hydraulic system on wood splitting machine, for not overheating the hydraulic system of the tractor.
inetesting problem belarus is like that, thay haw masiv flow pump, and what tipe of oil in tractor hidraulik sistem you put im Usually put 10w40 mineral oil and i dont haw a problem
Did you set the extra flow control valve to the minimum? The manual says the chipper can handle between 5 to 20 liters per min. You have an huge pump so I think you need to set it to minimum that the flow control can handle. I'm actually wondering if the tractor's remotes can handle the higher flow pump you have.
I've been running some math to check the flow. I'm not sure what engine RPM you have when running a 1000 RPM at the PTO. But let's say it's 2000 RPMS on the engine, the pump will produce 102 l/min. That's a lot even for the 1/2" hydraulic lines. The last video you mentioned about using the power steering pump and I think it's the best option right now. Or get a small hydraulic pump running directly from the Chipper with it's own hydraulic system integrated.
Engine is running between 1500-2000 RPM I guess. If I set the extra flow control valve to minimum I will loose power at the chipper motor. So it has to be a little bit open - and when the oil heated up even more open. I really need the power on the feed roller so it can shift all the wood in with power. Running it from the steering hydraulics is one option. It's maybe easier to build than complete hydraulic system for the chipper. Another way is to find a suitable flow control valve that can handle say 120l/min flow and run big 3/4 - 1" lines - but I have my doubts because I only have ~20L of hydraulic oil in the tank and I am quite sure it will heat up at some point and like you said tractor's remotes will start to suffer - I have been looking for alternatives but it's not very easy to find a nice distributor with all the features and price-tag I would like.
I would go with the independent hydraulic pump for the chipper, a small reservoir and the valves you already have. Does the chipper have any spare pulley you could use? Seems like they do it this way in the Gt model of this chipper. A small 7 to 10 cubic centimeter pump should be enough.
It's probably the safest way to go with the independent system. Looks like Gt model comes with on-board hydraulics.
You use a Gear pump? Look for Variable displacement pump..Variable displacement pump+oil cooler+bigger hydraulic oil tank..I dont know if you use 42 oil or 68 oil in the tractor.
but if at first the chipper works well it means that the revolution is the engine and oil pressures are correct
What motivates the chipper to fail after a while?
if the hydraulic is heated and becomes more fluid, not enough pressure in bars.
but I still see it very strange
The manufacturer says hydraulic flow need to be ~20 liters and minimum pressure 140bar.
изпользуете для отопления эти "чипсы"?
Для подстилки животным вместо соломы
для животных, обогревая дом и компост
Для чего используете щепку?
Для подстилки животным вместо соломы
для животных, обогревая дом и компост