RA Power Solutions was approached by a leading Fertilizer producing company based in north India regarding the requirement of onsite grinding and polishing of compressor crankshaft.

The company has five high-capacity CO2 compressors which have been imported from a leading company based in Europe.

Our team consisting of three technicians along with onsite crankshaft grinding equipment was deputed to the site and following was observed:

Details of CO2 Compressor Crankshaft:

S. NO	Crankshaft Details
1	Engine Make/ Model	CO2 COMPRESSOR
2	Crankpin Diameter Standard	317.30 MM
3	Crankpin Bearing Width	210.00 MM
4	Main Journal diameter	330 mm & 317.30 mm
5	Main Journal Width	370 mm & 225 mm
6	Place of execution of crankshaft repair	Fertilizers & Chemicals Plant in India

• On dimensional inspection of crankpin it was observed that crankpin nos. 02 developed excessive ovality. It also had deep line marks due to the failure of bearings which are of babbitt white metal type.
• The team inspected all the remaining crankpins. They observed rough surfaces and bearing line marks.
• The main journal had a standard diameter of 330 mm. It also had a rough surface and required polishing.

Action Taken by RA Power Solutions

The team noticed that the main journal, with a diameter of 330 mm, had a rough surface and bearing line marks. They decided to remove the crankshaft from the compressor.

RA Power Solutions technicians submitted a drawing of the V-Block, which was manufactured in the factory for the placement of the crankshaft.

The team ground crankpin no. 02 and maintained the final dimensions between 315.58 mm and 315.60 mm. They observed an ovality of only 0.02 mm.

All the remaining five crankpins were polished. The team removed the line marks and improved the surface finish. The surface finish after polishing measured less than 15 RA.

The team polished all the main journals onsite. They reduced the ovality to some extent and improved the surface finish to less than 15 RA.

Advantage of getting the crankshaft grinding/ Polishing done by RA Power Solutions

• RA Power Solutions is the only company in India having experience of forty-five years in crankshaft repair.
• We have ready availability of equipment up to 700 mm in diameter.The equipment is portable and lightweight. Technicians can carry it to any site worldwide as accompanied baggage.
• The modification in the onsite crankshaft grinding and polishing equipment is possible as per the site requirement.
• In this case, the team needed to polish the main journal diameter. They designed and fabricated the V-block onsite.
• RA Power Solutions as a protocol undertakes all the checks prior to grinding and polishing like cracks by MPI, Hardness test, deflection, etc.
• We also manufacture babbitt white metal bearings and do rebabbitting of old bearing up to 1500 mm diameter.

For more information on compressor crankshaft grinding and polishing onsite, crankshaft grinding services, in situ crankshaft grinding and polishing, onsite crankshaft repair, or crankshaft polishing services, email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com. Call at +91 9582647131,+91 9810012383.

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