Grease supply to 4 seals with different pressure gradients

In summary, the students are trying to figure out how to provide the same volumeflow in each supply line when the pressure gradients are different. They are thinking about installing a pump for each supply line, but that will take up too much space. They are also considering using different tube diameters to regulate the flow rates.
  • #1
Harris1337
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< Mentor Note -- thread moved to HH from the technical engineering forums, so no HH Template is shown >

Hey. We are a group of 4 students, working with a project.
The focus is directed towards the supply of hydraulic fluid. Four different piston cylinders subjected to different gradient pressures needs to be supplied with lubrication, but the volumeflow needs to be the same at each supplyline. We are not sure how to manage to achieve same volumeflow in each supplyline when the pressure gradients are different. We have been thinking about installing a pump for each supply line, but that will take to much place. Everithing needs to be minimized. Do you guys have some ideas? Answers will be much appreciated!
 

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  • #2
Just use different tube diameters to regulate the flow rates? Even easier would be just to use clamps on nylon tubing so you can make fine adjustments to the flow.
 
  • #3
Sorry, i forgot to say the gradient pressures may change. So different diameters on each supply line would not work. And if one of the pistons would break, the 3 remaining would work as redundancy and the pressure will increase over the 3 remaining pisotons. Is it easy to adjust the diameter using clamps on nylon tubing?
Thanks for answers
 
  • #4
So you are pushing grease into the pistons at the lowest part of the piston cycle?

Can you place the pistons vertically and just spray them all continuously at the lowest piston point collect the waste oil and recycle it? (allowing the piston head to reach a freshly oiled part of the cylinder when it reaches the low point and carry the oil up the cylinder.)

It is easy to adjust the diameter of nylon tubing finely with a bar clamp which is opened and closed by screws either side of the tubing.
 
  • #5
So you basiclly mean you can distribute the grease through one supply line, to the bottom seal, and then to the seal above, and so on? But how is it possible to go from 75 bar to 50 bar, 50 to 25? Will this be a serial connection instead of a parallell connection?
 

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1. What is the purpose of supplying grease to 4 seals with different pressure gradients?

The purpose of supplying grease to 4 seals with different pressure gradients is to ensure that each seal is properly lubricated and can function effectively. Grease helps to reduce friction and wear between the moving parts of the seals, which can extend their lifespan and prevent potential breakdowns.

2. How does the pressure gradient affect the amount of grease needed for each seal?

The pressure gradient refers to the difference in pressure between the inside and outside of the seal. A higher pressure gradient means that the seal is under greater stress, and therefore more grease is needed to maintain proper lubrication. Conversely, a lower pressure gradient requires less grease.

3. What type of grease is recommended for use in this scenario?

The type of grease recommended for use in this scenario will depend on the specific application and the type of seals being used. It is important to choose a grease that is compatible with the materials of the seals and can withstand the pressure and temperature conditions. Consulting with a lubrication expert or referring to the manufacturer's recommendations can help determine the best type of grease to use.

4. How often should the grease supply be replenished?

The frequency of replenishing the grease supply will depend on the usage and operating conditions of the seals. It is recommended to regularly monitor the condition of the seals and grease levels, and to replenish as needed. Generally, it is good practice to perform regular maintenance and lubrication checks to ensure optimal performance and prevent premature wear.

5. What are the potential consequences of not supplying enough grease to the seals?

If the seals are not properly lubricated, it can lead to increased friction and wear, which can result in premature failure and costly downtime. Insufficient grease can also cause overheating and damage to the seals, reducing their effectiveness and potentially causing leaks. It is important to maintain a proper grease supply to ensure the longevity and functionality of the seals.

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