Tamil Nadu Generation And Distribution Corporation Limited Tender
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Tamil Nadu Generation And Distribution Corporation Limited - TANGEDCO Tender
Machinery and Tools
Eprocure
Opening Date7 Sep 2023
Closing Date21 Sep 2023
Tender Amount₹ 6,75,460
Costs
EMD
₹ 6,700Document Cost
Refer DocumentsTender Fee
Refer Documents
Description
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Contact
Tender Id
2023_EB_367544_1Bid Award Id
ViewTender No
CE/SE/O/TTPS/Spec.No.153/23-24Tender Authority
Tamil Nadu Generation And Distribution Corporation Limited ViewPurchaser Address
-Website
http://tntenders.gov.in
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Documents
TTPS Operation Circle MPM I Unit-III Complete overhauling of Mill during breakdown
TTPS Operation Circle MPM I Unit-III Complete overhauling of Mill during breakdown
BOQ Items
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Charges for dismantling of lube oil cooler, from lube oil system,cleaning, flushing the cooler, oil pipe lines, water pipe lines, oil separator tank, checking of water lines, valves and nipples,replacement of worn out parts, reassembling the same as per the direction of engineer-in-change.
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Charges for providing wedges between lower skirt and Mill insulation cover plate firmly, removal of gearbox bottom cover flange bolts, lowering the thrust bearing and pump housing after supporting lower radial bearing housing. Lowering the thrust bearings and reassembling of all the above parts, providing SS shims at the bottom cover flange. Blue matching the worm shaft and worm wheel engagement till we get 20 to 50% pattern by trial method releasing/ providing thin SS shim sheet at the bottom cover flange and to get proper running clearance and centering of engagement.
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Charges for lifting the vertical shaft along with worm gear and worm wheel from top of the gear box and place it in stand. Dismantling the worm wheel hub lock nut and removal of worm wheel from the worm hub by steam/induction heating. Re-fixing the worm wheel or reversing it if required by the heating procedure to the existing or new worm wheel hub, Re-fixing the worm gear to the worm wheel assembly on the vertical shaft from top of the gear box and blue matching and adjusting for correct matching. This includes lead, lift, transportation of materials from and to stores and consumables.
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Charges for dismantling and removing worn out thrust bearing of Mill vertical shaft by gas heating the racer, cleaning the bearing seating area in the vertical shaft and assembling back new thrust bearing after heating the racer in oil bath.
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Charges for Renewal of thrust bearing adopter by oil heating and using necessary fixture for assembling the adopter in correct position after positioning the shims below the worm gear hub lock nut. Removing the thrust bearing adopter (worn out) and assembling the new adopter by heating.
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Charges for removal of seperator body along with classifier assembly. Inner cone mill outlet plate and venturi dismantling the air inlet housing after segregating from hot air duct placing in appropriate place. Dismantling the bowl with bowl hub and sepearating the bowl hub from bowl and in filling the same by new / old reconditioning after transporting the workshop reassembling the same. This includes lead, lift, transportation of materials from and to stores and consumables.
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Charges for Dismantling of upper skirt assembly, lower skirt assembly, Mechanical face seal assembly, dust guard and blue matching of seal runner, renewal of seal( bronze), air seal, dismantling of Mill bottom cover, upper bearing housing cover, oil seals etc., Complete overhauling, assembling back the lower skirt assembly, scrapper assembly and arresting the oil leakages in the return line and also spillage’s at the rear side of gearbox to prevent Mill fire including cleaning and tapping the threaded holes.
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Charges for dismantling the triangular liners, cutting the bulged Mill bottom plate, applying refractory cement at the Mill bottom plate 1 set by providing bolts and welding.
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Charges for dismantling the gear coupling bolts, gear coupling (worm shaft only), distance piece, unscrewing the worm shaft extension cover bolts and bearing housing cover bolts, removing the worm shaft extension cover, lowering to ground floor, releasing the worm shaft assembly from its position and assemblies providing back the overhauled worm shaft assembly in the gear box and fitting back the worm shaft extension cover, bolting and tightening the bolts to the required torque level and assembling back the gear coupling bolts, distance piece etc.
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Charges for checking the bearing clearance after dismantling the thrust bearing and radial bearing housing covers, removing the bushes, springs etc. thoroughly cleaning the bearing housings and other components inspecting the thrust bearings, resetting the axial clearance by reducing the thickness of shims in the thrust bearing housing cover, providing of new shims and by trial method adjusting the clearance to 0.10 mm to 0.15 mm. Assembling back the thrust and radial bearing housing properly and renewing the gland studs and gland packing in the worm shaft assembly.
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Charges for changing the worm shaft thrust bearing after gas heating and releasing the old bearings from the worm shaft, heating the new bearing in oil bath and providing the new bearing in the worm shaft in proper position.
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Charges for renewing radial bearing in the worm shaft after gas heating and releasing the old bearing and providing new bearing in the worm shaft after heating the bearing in oil bath.
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Charges for dismantling the radial bearing after removing the oil pump hub and oil pump bushing and reassembling the new radial bearing in the new/old radial bearing housing and assembling the new/old pump hub and bushing.
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Charges for changing worn out scraper pin, bush, pin cover, re conditioning of scrapper, cleaning of under bowl, checking of clearance, inspection and welding of wheels support lugs, wall side liners etc in mill under bowl.
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