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Repairing & dynamic balancing of 24mw pelton runner

Repairing and Dynamic Balancing of 24mw Pelton Runner

A Pelton turbine or Pelton runner is a type of hydro turbine (specifically an impulse turbine) used frequently in hydroelectric plants. These turbines are generally used for sites with heads greater than 300 meters. This type of turbine was created during the gold rush in 1880 by Lester Pelton.

The operation of a Pelton turbine is fairly simple. In this type of turbine, high speed jets of water emerge from the nozzles that surround the turbine. These nozzles are arranged so the water jet will hit the buckets at splitters, the center of the bucket where the water jet is divided into two streams.

Dynamic balancing as per IS1940/1 at Grade G1

Diameter- 1560 mm

Weight- 1510 KG

Material - G-X5CrNi134

Head - 528M

Flow - 5.54CuM/Sec

No Of Nozzles - 6 Nos

Capacity - 24MW

No Of Buckets - 20 Nos

Scope Of Work

Buffing & cleaning process

Hardness checking

Metallography

Dye penetrant test (dp test)

Dynamic balancing of mandrel & runner assembly

Process followed is briefed below:

Repairing and Dynamic Balancing of 24mw Pelton Runner
Repairing and Dynamic Balancing of 24mw Pelton Runner

Step:1

Buffing & cleaning of all running buckets

Repairing and Dynamic Balancing of 24mw Pelton Runner
Repairing and Dynamic Balancing of 24mw Pelton Runner

Step:2

Condition before & after buffing

Hardness check of the runner buckets

Step:3

Hardness check of the runner buckets

repair-and-dynamic-balancing-of-ihi-lance-compressor-pinion-shaft-assembly

Step:4

Surface is first cleaned properly with acetone, then the area is polished with the help of sand paper

Diamond paste is applied on polished surface to get mirror polish

Step:5

Diamond paste is applied on polished surface to get mirror polish

Diamond paste is applied on polished surface to get mirror polish

Step:6

Villea’s re-agent used for ething process

Diamond paste is applied on polished surface to get mirror polish

Step:7

Replica process being carried out

 Replica collected from the polished area for metallography

Step:8

Replica collected from the polished area for metallography

 Use of penetrant for dp test
Use of penetrant for dp test

Step:9

Use of penetrant for dp test

 Use of developer for dp test
 Use of developer for dp test
 Use of developer for dp test
 Use of developer for dp test

Step:10

Use of developer for dp test

  Dynamic balancing of individual mandrel

Step:11

Dynamic balancing of individual mandrel

  Dynamic balancing of individual mandrel

Initial Reading

  Dynamic balancing of individual mandrel

Final Reading

 Use of penetrant for dp test
Use of penetrant for dp test

Step:12

Assembly of runner with mandrel

 Use of penetrant for dp test

Step:13

Process for balancing of runner

  Dynamic balancing of individual mandrel

Initial Reading

  Dynamic balancing of individual mandrel

Final Reading

 Job ready for dispatch

Step:14

Job ready for dispatch

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