Closed Loop Systems

Closed Loop Systems - Part 1

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Күн бұрын

Make sure you watch our Pump Displacement Control Basics video: • Pump Displacement Cont...
Now that you're comfortable with displacement controls, we're ready to start a series on Closed Loop systems, sometimes called Hydrostatic Drives. In this first video, we'll learn how the Charge Pump and Check Valves prevent cavitation, and how the Hot Oil Shuttle Valve prevents overheating and provides lubrication.
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Пікірлер: 23

@zhengpakho 4 жыл бұрын

This video series helped me a lot! Thank you so much!

@triplezzz9182 8 жыл бұрын

Thank you very much sir, easily explained a tough topic.

@vivekpandey841 4 жыл бұрын

Nice

@user-mn9pc6df7c 7 жыл бұрын

رائع

@cck1496 7 жыл бұрын

Great work sir. What is the advantage of using variable displacement pump? In closed loop system, it will be continuously running non stop? Will it not reduce the pump life? Please reply in your spare time. Thanking you for sparing your valuable time.

@vishalsuthar9186 4 жыл бұрын

Sir can you make video on internal and external piloting valve?

@HeavyDutyLtd 5 жыл бұрын

Very nice

@GarfieldHobbs 8 жыл бұрын

Can you kindly add part 2 of this hydrostatic close loop video. I'm presenting reviewing hydrostatic drive and this part 1 is informative and would like to see the rest.

@lunchboxsessions 8 жыл бұрын

Thank you for the feedback, and I'm really glad you're enjoying our videos. We have not made the part 2 video yet, and we have a lot of topics to cover over the new few months, so I don't want to make any promises. But we will definitely circle back to closed loop systems and do the part 2 at some point in the future. Good luck with your presentation.

@lunchboxsessions 7 жыл бұрын

The part 2 video is now live: kzfaq.info/get/bejne/m8yGkrNh3Lnadas.html We've also made another video on the topic of the charge pump: kzfaq.info/get/bejne/hpemqZOYppzXcqc.html

@cck1496 7 жыл бұрын

Excellent video. Please keep on contributing. Is the charge pump a "gear type" pump and acts as booster pump for the main pump/ variable displacement pump?

@lunchboxsessions 7 жыл бұрын

Thank you. Yes the charge pump is usually a fixed displacement gear pump. Occasionally it is a vane type of pump. It does indeed act as a booster to the main pump. You've got it!

@markdbliss 8 жыл бұрын

What software do you use to create your animations? Flash, converted to video format? The quality of animation and material is excellent - great work.

@lunchboxsessions 8 жыл бұрын

Thanks for the kind words, Mark. You have a good eye; we are using Flash as the graphics engine for some schematics, though our newer ones are built to run directly in the browser so that we can support tablets and phones. The animation code is created with our own in-house software tools. Let me know if you have any questions for our programmers, and I can put you in touch. You'll find more information about the purpose of these Live Schematics on our website: www.cdiginc.com/live-schematics

@cck1496 7 жыл бұрын

You are doing an excellent job. Can you please tell me , how "internal leakages" can cause high temperature rise? For example, leakages through Relief valve etc? My query is that if there is an obstruction (less flow) than temperature should go high. Thanks for sparing your valuable time.

@lunchboxsessions 7 жыл бұрын

Thank you Abid Mahmood. Internal leakages cause high temperature issues due to fluid friction against component surfaces within a small opening (orifice). There must be some clearance for lubrication and thermal expansion between a piston and a cylinder in a piston pump. At high system pressures, the flow rates through these clearances increase. This means more friction and more temperature rise. Pump design engineers work hard to minimize these clearances and find ways to minimize the volumetric efficiency losses and the conversion of system input energy to heat. Partial obstruction does not always mean less flow. If we use a fixed displacement vane pump which has a high volumetric efficiency, reducing the diameter of the pump outlet line will only result in a higher linear velocity. The flow rate (volume/time) will not be changed. I hope that helps a little. Feel free to write again and keep the learning conversation going. - Carl

@cck1496 7 жыл бұрын

LunchBox Sessions Thank you sir for your excellent explanation. Please keep on enlightening. I like your work too much.

@simonreid4152 6 жыл бұрын

Hi lunch box, would i replicate this whole system besides the pump, for a four wheel drive set up? i.e. should this system be applied to each of the four motors