KhTK turbocompressor: bearing clearance reduced, drive turns more freely

PGT «KHIMPROM», shop 101 — chlorine production line · approved by chief mechanical engineer A. A. Levchenko; signed by shop manager A. F. Kalina, shop power engineer A. B. Bolshakov, XADO LLC engineers A. I. Novikov and N. I. Babanskikh

Ukraine · contract No. 20 of 28.05.2001 · measurements 19.07.2001 and 29.08.2001

PRODUCTXADO restorative compoundin the report — «XADO restorative grease»; the current product generation is revitalizants

TREATED COMPONENTBearings No. 32222 and No. 222Lsupports of the KhTK turbocompressor electric drive, shop 101

DOCUMENT TYPEMeasurement report on electric
drive bearing parametersapproved by the plant chief mechanical engineer, certified with a seal

Key results

↓16.7%

no-load current draw, 120 → 100 A

↑30%

electric drive coast-down time, 10 → 13 min

COMPONENT	WHERE IT OPERATES	WHAT WAS MEASURED
Bearing No. 32222	Support of the KhTK turbocompressor electric drive	Radial clearance
Bearing No. 222L	Support of the same electric drive	Radial clearance
Electric drive assembly	Chlorine production line, shop 101, continuous cycle	No-load current, coast-down time

Turbocompressor supports — radial clearance

BEARING	RADIAL CLEARANCE CHANGE	MEASUREMENTS
No. 32222	−48 %	19.07.2001 → 29.08.2001
No. 222L	−36 %	19.07.2001 → 29.08.2001

Clearance decreased in both supports — a layer built up in the friction zone. The relative change is given: it does not depend on the recording scale used in the report.

Turbocompressor electric drive — current and coast-down

PARAMETER	BEFORE TREATMENT	AFTER TREATMENT	CHANGE
No-load current draw	120 A	100 A	−16.7 %
Coast-down time	10 min	13 min	+30 %

Lower current and longer coast-down on one and the same unit are two independent indications that rotational resistance in the supports has dropped.

What the report recorded

The report of shop 101 at PGT «KHIMPROM» states: «in accordance with contract No. 20 of 28 May 2001, restorative repair of bearings No. 32222 and No. 222L of the KhTK turbocompressor electric drive was carried out with XADO restorative grease» — without disassembling the units and without taking the chlorine line out of service. Measurements before treatment and 41 days after it showed a reduction of radial clearance in both supports: by 48 % in bearing No. 32222 and by 36 % in bearing No. 222L — this is restored geometry in the friction zone. Measurements of the drive itself point the same way: no-load current draw fell by 16.7 % (120 → 100 A), and coast-down time grew by 30 % (10 → 13 min) — the shaft began to turn more freely. The report is approved by the plant chief mechanical engineer and certified with a seal.

The results apply to bearings No. 32222 and No. 222L of the KhTK turbocompressor electric drive under the conditions of shop 101 at PGT «KHIMPROM»; on other units and duty modes the figures may differ. The original report with signatures and seal is published in full and available for download.

Current equivalent

Revitalizant gel for compressors and bearings →

Piston, screw and centrifugal compressors; rolling and sliding bearings running in an oil bath; machine-tool spindle units and slideways.

How such units are treated: Bearings Electric motor

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