Pump R-171-15 and its motor: bearing vibration dropped with no teardown or shutdown

Vibration in the pump and motor bearings fell, the bearing units stayed in service. Heat-carrier pump R-171-15, Kaustik JSC. Russia · 2002. 24-41 %.

Kaustik JSC, shop 28 · approved by N. Stepanov, Deputy General Director for Production, endorsed by M. Degtyarenko, Chief Mechanical Engineer · measurements — plant expertise service, treatment — Tekhnoservice Group LLC

Tests 16 Jan – 07 Feb 2002 · report dated 26 Feb 2002 · shop order No. 12 of 14 Jan 2002

PRODUCTXADO materialsgel into the pump oil system · restorative grease into the electric motor bearings

TEST OBJECTHeat-carrier transfer pump item R-171-15nitrite-nitrate salt · bearing units of the pump and its drive electric motor, shop 28

DOCUMENT TYPETest report
signed and stampedvibration measurement protocols No. 21 and No. 77 of the expertise service

Key result

↓24-41%

vibration velocity in the pump and motor bearings, 1.93-3.83 → 1.26-2.72 mm/s

UNIT	CONDITION AT START OF TESTS	WHAT WAS MEASURED
Heat-carrier transfer pump item R-171-15	Vibration-level rating — “good”	Vibration velocity Vrms at points 3x, 3y, 4x, 4y
Drive electric motor of the pump	Vibration-level rating — “acceptable”	Vibration velocity Vrms at points 1x, 1y, 2x, 2y, 2z

Pump R-171-15 — vibration velocity by measurement point

MEASUREMENT POINT	BEFORE, mm/s	AFTER, mm/s	Vrms REDUCTION
3x	1.9273	1.2610	34.6 %
3y	2.0066	1.5685	21.8 %
4x	1.9294	1.2811	33.6 %
4y	1.9791	1.6299	17.6 %
Pump average	—	—	27 %

Measurements by the expertise service of Kaustik JSC at fixed points on the running unit: 16 Jan 2002 — before treatment, 07 Feb 2002 — after (protocols No. 21 and No. 77).

Pump drive motor — vibration velocity by measurement point

MEASUREMENT POINT	BEFORE, mm/s	AFTER, mm/s	Vrms REDUCTION
1x	3.8301	1.9137	50.1 %
1y	3.6673	2.7202	26.0 %
2x	2.8807	1.6950	41.2 %
2y	2.0230	1.5275	24.5 %
2z	2.9327	1.8966	35.3 %
Motor average	—	—	35.3 %

A drop in vibration velocity was recorded at all nine measurement points — on both treated units, the pump and the electric motor.

Commission findings and decision

The commission of Kaustik JSC recorded: the drop in vibration level indicates an ongoing process of restoration of the friction surfaces in the bearing units of the motor and the pump. Decision taken: 1. The test result shall be deemed positive; testing on pump R-171-15 shall continue until the actual bearing service life is established. 2. It is recommended to continue test work using XADO technology on similar equipment of the shop and of the plant as a whole. 3. At the start of the tests the pump and the motor had technical condition ratings by vibration level of “good” and “acceptable” respectively, therefore the effect of applying XADO materials proved substantial but not the maximum possible; for this reason it is recommended to select for testing objects with a vibration level close to the maximum permissible.

The results refer to heat-carrier transfer pump item R-171-15 and its drive electric motor under the conditions of shop 28 at Kaustik JSC; on other equipment and in other operating modes the figures may differ. The original signed and stamped report is published in full and available for download.

Current equivalent

Revitalizant gel for hydraulic systemsHydraulics · pumps · hydraulic motors
Revitalizant gel for compressors and bearingsCompressors · bearings · spindles

How such units are treated: Pump Bearings

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