How Massive Ship Steering Gears Work!
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- čas přidán 16. 07. 2021
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Learn how ship steering gears work! How do you turn a 200,000 tonne ship? This video will teach you all of this and a lot more!
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▶️Introduction
There are two main types of ship steering gear, these are the ram type and the rotary vane type. This video focuses on the four-ram electrohydraulic type steering gear, its main components, and how it works.
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First
Excellent model and explanation, Jon
Thank you!
Heeeey. I'd love to see more courses related to process Engineering. It could be sizing of tanks, equipment design, material and energy balance maybe. Anyway. Your channel is awesome
Hey, what is name of program you use for 3d modeling?
I did work on a steering gear from time to time on the same ship. One year 2 ships were docked stern to stern, we had just stepped out of the steering room. The other ship decided to do and engine test while the ship i was on had the rudder completely disconnected. The wash from the other ship flipped the rudder 180 degrees and almost killed the engineer working on the gear. It got wedged up agents the big cylinders and bent a bunch of things. spent the next weekend in there cutting the 1.75" grade 8 bolts with a reciprocating saw, then making new bolts .
original had to make up some tube clamps and the brass blocks where the cylinder rod connects to the rudder stock.
Excellent information. What do you mean by "wash from other ship" (while engine testing) because can the propeller be disconnected while engine testing (no load running)?
Thanks.
@@cck1496 well they didn't if they could ... this is not the best shipping company lol I'm a machinist not a marine engineer so i really don't know the finer details of that other ship , only walked through it once .
@@turboprint3d Thanks for your prompt reply. Keep it up.
@@cck1496 thanks I have been playing around with makeing a channel with just me and my buddy talking about the cool stuff we have worked on. Figure some people might like it .
Please make a video regarding ship's main engine water cooling and lub oil cooling system. With rhe help of 3D models and cut section view it is much easier to understand complex things 🙏👍.
We have a whole ship two stroke engine course planned. I've noted your comments.
Yes sir indeed
@@savree-3d Thank you, looking forward to it.
Sir, I wish to congratulate you on your beautiful spoken English Language and carefully chosen words and vocabulary to communicate to the listener, as well as establishing a specific voice style. You are a Gentleman Engineer who is tuned
up well in both the language spoken symbols and the real fact engineering static and dynamic functions, selecting the right components to fit the function.
You said that this is a simple diagram but it describes a very robust system both in schematic and practical terms. I can see the dump valves complete with a line to the high-pressure pump. What I am admiring most is the piston seal position as it could be maintained rather easier than being on the piston end as found in some other push-pull cylinder systems. In one system I had to introduce baffles and cooling in the settling tank as the dump valves were operating too often and so bubbles needed time to settle and not be sucked into the pump. Many pumps get eroded because of the hydraulic oil not having time to settle in the tank and the bubbles rising to the surface.
Just for you to consider including crosshead bearing blocks where you mentioned that a lot of grease is necessary to reduce the pressure on those pins. Please note the propeller blades need to be reconsidered as normally your leading edge is the trailing edge. As it is that propeller will cavitate a lot due to the fact that the apparent entry angle in the leading edge of the blade is lost. I see that on the rudder you introduced one of those propeller hub streamlining devices.
Your voice sounds very young but you have accumulated a lot of experience. Congratulations.
Thanks Carmel! I will be 40 years old in a few years...but I feel young :)
Grease also reduces wear, keeping slack to a minimum. Nice explanation and graphics.
Awesome video. Your 3D models are very visual, and you give great detailed explanation. I used to be a wheelsman on Great Lakes bulk cargo vessels, so this hits right at home.
I'm literally gonna download all your videos. To be taken used at sea while I have no internet. This is beyond great content thanks so much
Who ever drew your propeller had no idea what they were doing. hahahahaha
Props don't rotate trailing edge first. The flukes are back to front.
I really enjoyed your diagram. Very clever how you did that for showing the different types of valves. You made it easy and fun to learn. I'm Very impressed, good job sir!
Thanks Austin, much appreciated.
this was my career with a steering gear manufacturer and with a marine engineering company worked from small to medium to very large but not vlcc class been retired ten years now. The systems I worked on the cylinder rods were pinned to the tiller arm only used the slide type tiller on small point to point ferries.
I saw a video of an engineer going through his activities to start up a ship and he goes to the rudder angle indicator, then goes on the radio to the bridge and the bridge moves the rudder and they confirm the rudder moves at the angles and direction the bridge signals and, that the angles and direction shown in the bridge's indicators correspond to the positions shown on the rudder indicator. You can't check the brakes, but you can check the steering before moving.
Simple video and easy to understand, thanks!!🥰🥰🥰🥰🥰
You are saviour for marine engineers like me by providing 3d models....u r simply too good....hope to see more detailed videos on marine engineering to clear our concepts....will tell my colleagues to subscribe you like i did.... once again thanks a ton for videos...
Just one doubt how bidirectional valve controls i mean how it get signal from to change position
A truly accurate description: thanks!
Thanks for making such 3D videos
18:40 port and starboard reversed. Thank you for such an informative video.
no, the view is looking aft at that poit
Clear cut conceptual video
Will love to see some videos related to LNG carrier ships like difference between conventional 2 stroke engine and MEGI engines or maybe the equipments related to MEGI engines.
Love your efforts.
Excellent tutorial about ship equipments
I enjoy watching
Thank u so much such as working
Really informative... I'm just installing a stearing gear setup on a vessel now a days... your did cleared alot of my concepts
Your video make me feels like I'm on ships
Great video thank you, I used to work on this systems in the navy then on conventional tugs ,,, never run a z-drive or a-pods though
Brilliant video and very informative, thank you for your short and precise explanation 👍
Brilliant video. This is a must watch for all mechanical engineers !
Excellent effort to explain the 4 Ram type steering. Next video could be about the Rotary Vane Steering gear. Subsequently, you could add Safematic Steering (IMO requirement for large tankers). Also, the significance of Rudder drop and the Jumping clearance.👌👍
Rotary vane steering gear is planned Vikram!
I sailed on a number of very large ships in the late sixties/seventies, for the most part they had steering gear as is your diagram...Usually manufactured by John Haste, (Scotland) even on ships built in Japan. The ships steering wheel on the bridge could be operated either in manual mode ...where you felt hydraulic resistance...or electrically. The former would always return to amidships if you released pressure, the later had to be returned manually. These VLCC ships were quite easy to steer once you got used to the fact they didn't react very quickly to initial rudder movement. Very good explanation of these huge pieces of equipment.
Modern driver assistance technology is now much more advanced. it was installed to turn the boat and power it now
3:59 "Between 35 to 35 degrees maximum" lol
It is fully possible to adjust the position of a rudder - even on a 200,000 ton ship - manually with the use of pulleys. You would simply need a whole lot of gear shifting or multiple people.
Perhaps practical is the word to use instead of possible.
@@carultch It was done by the 20,000 ton heavy cruiser Admiral Hipper after being bombed by the RAF during WWII. So possible, but given that it required a significant percentage of the crew to lean on a tiller, it was certainly not especially effective.
Thanks John.I finally got to know how these steering engines worked despite having sailed in over 50 merchant ships in the 1950s to 60s.
As one of the aforementioned muscley sailors, we rarely had occasion to enter the steering flat, that being engineer domain.
Most ships had this kind of steering equipment, referred to as telemotors but a couple of older ships had steam powered steering engines. Although they did the job, they made a hell of a clattering banging din, and as the steering flat was immediately below the sailors and firemens accommodation, sleep was difficult to say the least. The merest touch of the helm generated bedlam.
So thank God for hydraulic steering motors.
A
I could've gotten the same information in two minutes of this video.
Like I said previously, I am not an engineer but required to know about ships occasionally, as part of my profession. I find your videos absolutely enlightening, and, simple and easy to understand. Thank you very much for your series of videos on ships. PS: I think there is a tiny typo error in the angle of movement of the rudder. It seems repeat 35 degrees twice. Thanks again.
wonderful ... explanation
Please upload next video of this series
I love hearing those Dutch words in the English language. Stock = stok, the Dutch word for a stick. Helmstok = Tiller.
Simple straight forward , thank u
Certainly a more modern steering gear system. While the new directional valves and rudder indicator sensors provide for good control and sensor feeds to remote indicators I still have a soft spot in my heart for the mechanical elegance of a hunting gear controlled system using variable stroke pumps and telemotor receivers. Good introductory teaching video though.
Fantastic explanation ! Beautiful animation ! Very informative material 👍 thank you very much 🙏 much appreciated 🙏 God bless you sir ! 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏
Thank you for sharing. High quality animation and clear delivery of the material.
Sukerna, as Jon is a Marine Engineer, good quality is always assured 😉
Very nice, Jon. Excellent 3D model makes the explanation very easy to comprehend.👍
Many thanks!
Very thorough, thank you !
A magnificent explanation Sir Thanks for posting!
Really interesting! I wasn't aware of how complex the ship steering gear is and this video explained it really well!
Many thanks!
Glad you enjoyed it!
Thank you mate!
Thank you so much brother ❤️❤️❤️❤️
you are helping me a lot for my class 4 exams with your videos ❤️❤️🔥
Plz keep doing 🙏🏾🙏🏾
It's my pleasure. I also took my class 4 exams, although it was a while ago!
excellent,learning made simple,Please keep making more videos on marine machinery and systems
eg-air starting system etc
very, very good
Modern props are a thing of beauty.
Best youtube Channel for engineers
Awesome content. Thank you. Codpiece … been awhile since I’ve heard that 😂
What Engineering Mindset : Electrical , saVRee : Marine...Muchas Gracias.
thank you
Thank you sooo much for this video.. it's suoer clear
very clear. Thanks!
Glad it helped!
Most interesting, thanks!
I'd be curious to see the scale of the rudder control in relation to, say, a human. It must be fairly massive.
It largely depends on the vessel size but cylinders can be up to 18 inches in outside diameter, are the largest I worked on or can be as small as 50 mm. The largest cylinders I have worked on require a 4 ton chain hoist on an I beam track above them to service them individually.
Very nice video. Great in depth explanation
Excellent video....thank you
excellent explanation!!
Please make a 3d animated video on purifiers and air compressor used on ship. It will help me and many other like me who are newly promoted to 4th engineer. Thank you
Please make a video of ship internal structure part names and about three framing system
Looking at the scale of things the motors on the hydraulic units would be very large. I'm wondering about the dimensions, weight, HP ratings and electric requirements of those motors. Also looks like the diameter of the rams would be several feet thick.
Oh yes, you got a ship the size of a continent , those motors would be power equivilant of tractor engines
Sir you put so much effort for each videos, really appreciate it. By the way, it would be great if you can make a video on Directional Control Valves solely.
Noted. Not sure when we can do it though. Will do our best!
There are already many videos on Directional control valves. No need to reinvent the wheel 😉
Here is the link to one such video
czcams.com/video/leCy8Gb2k6U/video.html
@@vikrammgokhale Thank you Sir
Well done for these videos
the wheelhouse is not always the bridge. Usually the wheelhouse is directly below the bridge
Memories of my mechanic courses in the French national navy !!
Very informative and great CGI. Well done.
Really cool stuff!
sir pls make video on sewage treatment plant construction working
Just a curious landlubber here. I guess the term "steering gear" led me up the garden path. I thought there would be gears. 🤣
Could you please make a video for two strokes engine lubrication system
EVER GREEN : HOLD MY BEER.
Who and how the DCV are controlled......once we achieve the command from bridge how rudder comes to original position.....pls pls 🙏pls pls pls 🙏......make another video with great detail.............you really work hard for ......thanks dear
Thank you Soooo much....
One small point that I noticed: in the beginning of the video, you have mentioned the electric motors, but not specified what the motors are actually driving? A short description of the main types of pumps would make it clearer: viz. axial piston or radial piston types. Besides driving the main pumps, they also provide the drive for the servo pumps. The oil from the main pumps is sent to the rams, whilst the oil from the servo pumps is used to operate the bypass valves. Also, there are auto isolation valves used to restore steering in case of any leakage ('single failure' is the term used in SOLAS). Maybe you are intending to make another video for these details? 😀
Yeah, there is a lot missing. We could actually make a 1.5 hour video course just about steering gears, its just that my time is restricted a lot at the moment. We have axial piston pumps in the 3D library, but I did not want to mention them because then I would have had to discuss the servo pumps (probably) and the whole momentum of the video slows-down. We will do all of this stuff at some point though.
Thank you
Great video✌️
Working on ships the hydraulic line was the thicknesses i have ever seen.
The OD was around 1.25" and ID was around . 378"
So the hydraulic pressure must be huge. No checking for leaks with your finger 😬☠
sir pls make videos on fuel oil purifier also pls construction and working
wow, perfect
Great video!! Keep it up!
@saVRee Please keep making videos about naval engineering. I am a yacht design student, and these topics are very useful to me
Noted. No promises though! I worked as an engineer on super yachts for about 8 years. Nice boats.
Great videos 👍
Thanks 👍
@@savree-3d You're welcome !
Awesome video, thanks.
You're welcome
Please make a video regarding CHP (combined heat and power) gas engine
Thanyou ❤️❤️❤️
Is the pump kept on through out the voyage or pressure is maintained by jockey and pump is started at the instant of changing the direction.
The pump is kept on during the voyage and during manoeuvring both are running.
But there are systems were the pumps are powered by VFD’s and run when required by the auto pilot or helmsman.
Top notch cad
I always thought propellers always spun with the rounded edge going in the direction of rotation D:
The propeller was going in reverse.
Idk why.
Just saying.
@@michaelgarrow3239 Sir, RJ was correct, the propeller blades are not shown correctly and it is not reversing. indicated by the pitch angle shown and rotation shown.
It looked like a salad on a plate so i clicked what do you want me to do i was hungry
Nice video, had to watch it in 1,75x speed tho, you seem like a slow fella 🙂
Slow and steady wins the race!
But, yes, a lot of people say I should speed up a bit :-)
Flip side of the coin: If you speed up the process, you are likely to miss some points.
good video 😍
Excellent tutorial video. (@3:00) In the discussion of the tiller and pin being a high friction point that requires "a lot of grease". Are there no roller bearings on the pins? Seems like there would be to extend the life of the tiller running surfaces..."with a lot of grease", too.
Normally the pin has a roller type bearing on it. In fact, the outer ring of the bearing runs in the slot of the tiller. But there are variations in the lay-out
@@janvisser2223 Thanks for clarifying this point. I've worked on a lot of mechanical production line equipment over the decades and every successful cam and roller design mechanism incorporated roller bearings to prevent wear. I can't even imagine the psi of force this rudder control encounters...got to be measured in tons.
Great explanation of the workings of these massive systems. 'Just a question from a non-engineer though - why do the systems use tanks of fluid as well as the fluid already in the cylinders? Would it work if you used pumps to just fill one cylinder with the fluid from its opposite partner?
Really interesting video. Make so much better by the complete absence of irrelevant irritating background music.
and how does the rudder and steering gear assembly deals with the reaction or opposing forces caused by the flow of water? the forces must be high, so how these assemblies are mounted on the ship (or how their mountings are mounted), so that they dont get ripped apart during their mode of operation? (or just the massive bed is enough, which is shown here?)
very very well bolted to the deck head and beams
@@licencetoswill i already got my answer long time ago, but thanks anyway
So im currently in a squall like 120 mph sustained winds and consistant 40 ft crests or air pockets. How do i keep my engines and inverters from flooding or jamming blow outs etc... im on a 350 ft aircraft carrier and looking to upgrading to the PRELUDE once i pick a route and can re pressurize the bow and stern ports... and add an engine system other than that might as well install some masts incase we capsize the air waves could flip me back over like a nice drift soc eh.
Nice work again but one question please. Are the head ends of the cylinders vented to atmosphere? Or just simplified view of double acting cylinders.
So this fork thing... It it to get faster responses at small rudder deflections? I am guessing that based on the lever arm being variable length. Longest when the most force is required at max deflection.
in what situation would u be in that u need a local rudder scale to know the derees in ?
if u cant steer it from there anyway?
You can steer the rudder from there if needed, by manually operating the direction valves.
Why no videos , your work has been great 👍 ,
Sir can you please explain about emergency fire pump and air compressor 🙏
Interesting so it gains leverage as it turns further. Man why didnt i go 2 school 4 engineering. Mechanic now a commercial carpenter i understand all this stuff but no degree=lower pay
i am a River Pilot (Captain) on the river Rhine. And we use Rudders up to 90° and this with full effect. Though i got before a bit smaller ship (52m long) where 90°didnt has as much of a turning power, there my experience showed me, that 60° wasth most effective. But that caused of the pecific ruddertype we had.
Normal Inland waterway carriers usually use 90° with best effect. Those ships usually are between 110m and 183m long...
maybe we use more degrees because we are driving in currents. Or maybe its because the Engine power to rudder size ratio is different than it is by offshore bulk carriers. or can you explainme why this is so?