Sir, you mentioned on metering out in both directions would cause a significant increase in pressure on the rod end. What it not be better to meter out the bottom end and meter in the rod end? Thank you for any information.
Hello, i have a cilinder with a simulair movement. When the cilinder is max in and I steer the cilinder out, the first movement is really fast and uncontrolled, after the first steering, it is normal speed how i set with the orifice. Is this the case because of the vacuum/cavitation?
I'm not sure I understand your question. At 3:57 the 4 port, 3 position directional control valve has returned to it's closed center. It is centered by springs. Is that the valve you are referring to? That valve has two solenoids, one on each end. The solenoids are the valve operators and are the rectangles with the diagonal slash on each end of the valve symbol. Only one solenoid is activated at any one time.
I'll try to help as best I can. Half of the battle in hydraulic system troubleshooting is knowing exactly what 'normal' is. So it will definitely help if you provide even more detail about how the machine has functioned right up until recently and then what exactly you are observing now in the faulted state. You said "traverse motor OR slewing motor runs jerky when traversing" (upper case letters - mine). Does this mean that the traverse function is jerky when traversing only, and that when slewing while traversing, that it is now the slewing motor that is jerky? Are there pressure gauges on the hydraulic system ? If so, do you have any pressure reading data from before and now during the fault? - Carl
Hi tnx for reverting back! Actually the crane it self jerky while slewing the slewing motor foundation is OK. Do you think that any problems with the slewing ring or bearing ? Shall I conduct a rocking test. Or might be some other fault in the system line itself ? And none pressure gauge fitted over it.
If there is a hydraulic system schematic, please email it to info@lunchboxsessions.com. If there is no hydraulic schematic, I would recommend that you try to obtain one from the crane manufacturer, and or have a schematic made up for you. The schematic is an important tool for troubleshooting. There are a good number of possibilities for this behavior, and yes sometimes a mechanical binding fault outside of the hydraulic system, is the cause. I once had a client with a hydraulic slewing motor that would stall, and every few weeks they would continue to increase the relief valve pressure setting, well beyond the machine manufacturer's specification (very dangerous) to get the motor to turn. They believed there was a hydraulic fault. They later discovered that the slewing bearing lube system had failed. The slewing motor itself may have an internal fault. If there are cross-port relief valve between the motor ports, there may be a fault in them. The list of potential faults is long, if we are just speaking theoretically. It is difficult for me to say exactly what you should do next without specific knowledge of your machine. Is the crane manufacturer still in business? If so, you will want to get them involved. They will have safe and best practices for your next steps. If you have access to a hydraulics maintenance/troubleshooting expert who can come and help you at the site, they will most likely spend some time making sure that the hydraulic system overall is adjusted correctly (pressure control, pump controls, flow settings etc.) before diving into the specific sub-circuit for the slewing system. - Carl
Excellent video, thank you for making this. On a flow control spec that i've found it shows a one directional arrow after the orifice (not 45 deg across as shown in video) perpendicular to the flow path. What is that representing?
i dont mean to be so offtopic but does someone know a way to get back into an instagram account?? I was stupid lost my login password. I love any tricks you can offer me.
@Denver Brennan Thanks so much for your reply. I found the site on google and im trying it out atm. I see it takes a while so I will reply here later when my account password hopefully is recovered.
Thanks! We've got some information about how we make these simulations here on our website: www.lunchboxsessions.com/help/what-software-do-you-use-to-make-the-simulations
bardet hammer We built this software in-house for our own use. It is not available at this time as a user installable package. But you can certainly work the controls and pull the levers yourself when you sign up for a session at LunchBoxSessions.com. Thanks so much for your inquiry.
Dear Sir............Example Problem I have a single acting hydraulic cylinder with a stroke of 300 mm, a bore of 18 mm and a rod of 10 mm if the press weight is 10 mm on the Piston Head what is the pressure.....Please explain the calculations
Sir my telescopic crane boom is jerking when we getting it out or in. its smoothly coming out about 4mtters after that its start jerking (jumping). same issue in tele1 & tele2. need ur help plaza.
Sir my telescopic crane boom is jerking when we getting it out or in. its smoothly coming out about 4mtters after that its start jerking (jumping). same issue in tele1 & tele2. need ur help plzz
Thanks for making this topic simple with animation. Really loved the way you explained.
This is a tremendous help! Thank you!!
the music goes hard
Sir, you mentioned on metering out in both directions would cause a significant increase in pressure on the rod end. What it not be better to meter out the bottom end and meter in the rod end? Thank you for any information.
It is very difficult to match the flow rates of two flow control valves working on both sides of a differential cylinder.
What is opposing load and running away load
thanx for these videos :) can you please make video on electrohydraulics and electro pneumatics?
Nice information...
Great video.Understood everything you said.
Thank you so much
Thank you sir 😊😊
Do you know how to calculate the actuator's operating speed? Under loaded and unloaded conditions.
Great video! Thanks!
Hello, i have a cilinder with a simulair movement. When the cilinder is max in and I steer the cilinder out, the first movement is really fast and uncontrolled, after the first steering, it is normal speed how i set with the orifice. Is this the case because of the vacuum/cavitation?
use restrictive valve with 4 mm hole and use counterbalance valve
nice video
Thanks...
I felt very easy after refering to this video....
what set of dynamical equations can be used to determine the vaccum pressure in the chambers?
What is the difference between fixed displacement pump and variable displacement pump?
Is this open loop or closed loop system?
Thanks good information ❤❤
Why oil should go through a check valve only, when return (meter-in), needle valve installed in parallel and it is open as well?
Oil takes the path of least resistance. In this case the check valve
The relief valve does not function?
what if you put a spring on the load to keep it against the cylinder?
please upload video hydraulic pressure intensifier animation
ı wish we could see the pressure while retracting and extending between relief valfe and pump
in your example (3:57) is that a double acting valve or a single acting valve?
I'm not sure I understand your question. At 3:57 the 4 port, 3 position directional control valve has returned to it's closed center. It is centered by springs. Is that the valve you are referring to? That valve has two solenoids, one on each end. The solenoids are the valve operators and are the rectangles with the diagonal slash on each end of the valve symbol. Only one solenoid is activated at any one time.
Hi, I need some information to connect an electro-hydraulic distributor
Very helpful for video.
can you please tell me if my Marine hydraulic crane traverse motor or slewing motor runs jerky when traversing what might be the problem with this?
I'll try to help as best I can. Half of the battle in hydraulic system troubleshooting is knowing exactly what 'normal' is. So it will definitely help if you provide even more detail about how the machine has functioned right up until recently and then what exactly you are observing now in the faulted state. You said "traverse motor OR slewing motor runs jerky when traversing" (upper case letters - mine). Does this mean that the traverse function is jerky when traversing only, and that when slewing while traversing, that it is now the slewing motor that is jerky? Are there pressure gauges on the hydraulic system ? If so, do you have any pressure reading data from before and now during the fault? - Carl
Hi tnx for reverting back! Actually the crane it self jerky while slewing the slewing motor foundation is OK. Do you think that any problems with the slewing ring or bearing ? Shall I conduct a rocking test. Or might be some other fault in the system line itself ? And none pressure gauge fitted over it.
If there is a hydraulic system schematic, please email it to info@lunchboxsessions.com. If there is no hydraulic schematic, I would recommend that you try to obtain one from the crane manufacturer, and or have a schematic made up for you. The schematic is an important tool for troubleshooting.
There are a good number of possibilities for this behavior, and yes sometimes a mechanical binding fault outside of the hydraulic system, is the cause. I once had a client with a hydraulic slewing motor that would stall, and every few weeks they would continue to increase the relief valve pressure setting, well beyond the machine manufacturer's specification (very dangerous) to get the motor to turn. They believed there was a hydraulic fault. They later discovered that the slewing bearing lube system had failed. The slewing motor itself may have an internal fault. If there are cross-port relief valve between the motor ports, there may be a fault in them. The list of potential faults is long, if we are just speaking theoretically.
It is difficult for me to say exactly what you should do next without specific knowledge of your machine. Is the crane manufacturer still in business? If so, you will want to get them involved. They will have safe and best practices for your next steps.
If you have access to a hydraulics maintenance/troubleshooting expert who can come and help you at the site, they will most likely spend some time making sure that the hydraulic system overall is adjusted correctly (pressure control, pump controls, flow settings etc.) before diving into the specific sub-circuit for the slewing system. - Carl
Very interesting!
Would you have a video that explains end cushioning ?
Isnt end cushioning just to protect internal components from shock loading? Could be wrong.
Excellent video, thank you for making this. On a flow control spec that i've found it shows a one directional arrow after the orifice (not 45 deg across as shown in video) perpendicular to the flow path. What is that representing?
i dont mean to be so offtopic but does someone know a way to get back into an instagram account??
I was stupid lost my login password. I love any tricks you can offer me.
@Justice Adriel Instablaster ;)
@Denver Brennan Thanks so much for your reply. I found the site on google and im trying it out atm.
I see it takes a while so I will reply here later when my account password hopefully is recovered.
@Denver Brennan it did the trick and I finally got access to my account again. Im so happy!
Thanks so much you saved my account!
@Justice Adriel happy to help =)
That meter out and in is that the turtle and rabbit sign on the panel?
Nice
What software is being used in these videos? The videos are very well made 👌
Thanks! We've got some information about how we make these simulations here on our website: www.lunchboxsessions.com/help/what-software-do-you-use-to-make-the-simulations
Can I have the program or demo to try which you use to create and simulate your hydraulic diagrams ?
bardet hammer We built this software in-house for our own use. It is not available at this time as a user installable package. But you can certainly work the controls and pull the levers yourself when you sign up for a session at LunchBoxSessions.com. Thanks so much for your inquiry.
@@lunchboxsessions Can you send me link regarding stimulation where i can work on this?
Dear Sir............Example Problem I have a single acting hydraulic cylinder with a stroke of 300 mm, a bore of 18 mm and a rod of 10 mm if the press weight is 10 mm on the Piston Head what is the pressure.....Please explain the calculations
Great vedio🇧🇩🇧🇩
Think you too much my favourite teacher's
Sir I want to learn difference between external piloting and internal piloting how to work and what is benefir.
tq sir
Sir my telescopic crane boom is jerking when we getting it out or in.
its smoothly coming out about 4mtters after that its start jerking (jumping).
same issue in tele1 & tele2.
need ur help plaza.
Sir my telescopic crane boom is jerking when we getting it out or in.
its smoothly coming out about 4mtters after that its start jerking (jumping).
same issue in tele1 & tele2.
need ur help plzz
Kavit Kadu
TYME
Vinod Habale TYME
Hindi language
very bad demonstrations no need writing onvideo