How to increase the abrasion resistance of rotor

In summary: Santhosh is looking for a way to increase the abrasion resistance of the rotor on the sealing area. The rotor is made of SS316, which is not a good choice for this application. Chromium coating was supposed to give the wear resistance, but it too failed. Inspecting the rotors to make sure the chromium coating had the required hardness was not done. Considering another kind of equipment to accomplish the task might be a better option.
  • #1
Santhosh KN
1
0
For Kaolin slurry filter presing we are using progressive cavity pumps.After three months of operation we found that the pumping rate is reduced a lot.Upon investigation we found taht this is because of the abrasion. 150 micron Chromium coating done, still after three months ,this again failed.

The rotor is having 125mm diameter and is of 2.8m long. As the medium handled is Clay Slurry with low pH the MOC of the rotor is SS316. This rotor rotates inside a neoprene rubber stator while pumping the slurry. For the pump to develop a pressure of 10 bar the sealing between th rotor and stator is very important and the damage to the sealing area reduces the pump through put.

We are looking for a suitable method for increasing the abrasion resistance of the rotor along the sealing area.

Any suggestions?

Santhosh
 
Engineering news on Phys.org
  • #2
What about pressurised water to lubricate the seal?
 
  • #3
If abrasion is really what your problem is, then you definitely need a rotor material change. 316 is not a very good choice for this. It sounds like the chromium coating was supposed to give you the wear resistance you needed, but it too failed. I don't see how you can get away with not changing rotor material to something with a higher hardness.

Did anyone inspect your rotors to make sure the chromium coating had the required hardness?
 
  • #4
Maybe a ceramic coating?
 
  • #5
This kind of equipment is used extensively in the oil field and is often referred to as a "mud pump" or "mud motor". It is used to deliver drilling fluid (aka "drilling mud") to the drill bit. Do not know the comparability of your kaolin slurry to the (typically bentonite) clay found in drilling mud - but you might look for a solution within the oil industry experience with this equipment. One thing you probably will not be able to replicate in your application is the oil industry's use of various additives to change the mud's properties.

Have you considered another kind of equipment to accomplish the task... such as an inclined conveyor?
 

1. How does the material of the rotor affect its abrasion resistance?

The material of the rotor plays a crucial role in determining its abrasion resistance. Materials such as hardened steel or ceramic are known to have high abrasion resistance, while softer materials like aluminum or plastic have lower resistance.

2. Can the shape or design of the rotor impact its abrasion resistance?

Yes, the shape and design of the rotor can affect its abrasion resistance. A smooth, streamlined design can reduce the contact surface area and minimize wear, while sharp edges or rough surfaces can lead to increased abrasion.

3. Is it possible to increase the abrasion resistance of an existing rotor?

Yes, it is possible to increase the abrasion resistance of an existing rotor through various methods such as adding a protective coating, heat treatment, or using a harder material for repairs or replacements.

4. Are there any external factors that can affect the abrasion resistance of a rotor?

External factors such as temperature, humidity, and exposure to chemicals or corrosive substances can impact the abrasion resistance of a rotor. It is important to consider these factors when designing or selecting a rotor for a specific application.

5. What are some ways to test the abrasion resistance of a rotor?

There are several industry-standard tests that can be used to evaluate the abrasion resistance of a rotor, such as the Taber Abrasion test or the ASTM G65 test. These tests involve subjecting the rotor to controlled abrasion under specific conditions and measuring the wear rate to determine its resistance.

Similar threads

How Does Air Resistance Affect the Acceleration of Falling Objects?
    • Introductory Physics Homework Help
Replies
13
Views
2K

Hot Threads

Recent Insights

Back
Top