IE A034REPORT ON MEASUREMENTS OF LOCOMOTIVE OPERATING PARAMETERS
TEM 15 locomotive: diesel and compressor gained without teardown
The cylinder-piston group tightened up, the compressor began building up pressure faster, vibration dropped. 7–17 % — diesel cylinder compression, 560 rpm, 23–29 → 26–30 kgf/cm²; 12.9 % — KT-6 compressor output when charging 7–8 kgf/cm², 35 → 31 s; 55–69 % — vibration velocity at engine and compressor points, 3.2–6.3 → 1.1–3.1 mm/s (2009).
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Key results
| UNIT | OPERATING TIME BETWEEN MEASUREMENTS | WHAT WAS MEASURED |
|---|---|---|
| D-49 diesel engine of TEM 15 locomotive No. 166 | 470 h | Compression and maximum combustion pressure per cylinder at three speed modes; block vibration at 12 points; fuel consumption at idle |
| KT-6 air compressor of the same locomotive | 470 h | Pneumatic system filling time over three pressure ranges; housing vibration at 4 points; oil pressure in the lubrication system |
D-49 diesel engine — compression per cylinder
| CYLINDER | 320 RPM, kgf/cm² | 560 RPM, kgf/cm² | 760 RPM, kgf/cm² |
|---|---|---|---|
| I | 22.0 → 24.0 | 23.0 → 27.0 | 32.0 → 33.0 |
| II | 22.0 → 24.0 | 24.0 → 26.0 | 28.0 → 30.0 |
| V | 25.0 → 26.0 | 28.0 → 30.0 | 30.0 → 32.0 |
| VI | 26.0 → 26.0 | 29.0 → 29.0 | 30.0 → 32.0 |
| VIII | 25.0 → 26.0 | — | 31.0 → 33.0 |
Valve unit KU 55201. The largest gain is in the cylinders with the lowest initial compression: the spread between cylinders narrowed and the row evened out.
D-49 diesel engine — maximum combustion pressure
| CYLINDER | 320 RPM, kgf/cm² | 560 RPM, kgf/cm² | 760 RPM, kgf/cm² |
|---|---|---|---|
| I | 22.0 → 25.0 | 23.0 → 29.0 | 32.0 → 33.0 |
| II | 32.0 → 35.0 | 34.0 → 36.0 | 36.0 → 39.0 |
| V | 25.0 → 27.0 | 30.0 → 32.0 | 36.0 → 38.0 |
| VI | 26.0 → 28.0 | 36.0 → 36.0 | 38.0 → 40.0 |
| VIII | 48.0 → 48.0 | 48.0 → 48.0 | 52.0 → 50.0 |
Same instrument and same speed modes. According to the report's conclusions, combustion pressure rose by 2–6 kgf/cm² and compression by 1–4 kgf/cm².
KT-6 air compressor — pneumatic system filling and oil pressure
| PARAMETER | BEFORE | AFTER |
|---|---|---|
| Pneumatic system filling from 7.0 to 8.0 kgf/cm² | 35.0 s | 31.0 s |
| Pneumatic system filling from 4.0 to 8.0 kgf/cm² | 2 min 09 s | 2 min 07 s |
| Pneumatic system filling from 0 to 8.0 kgf/cm² | 4 min 18 s | 3 min 56 s |
| Oil pressure in the compressor lubrication system | 5.0 kgf/cm² | 5.0 kgf/cm² |
AGAT stopwatch and the standard pressure gauge, engine speed 250 rpm. According to the report's conclusions, compressor output increased by an average of 9 %.
D-49 diesel engine block vibration — 12 control points
| MEASUREMENT POINT | VIBRATION VELOCITY, mm/s | VIBRATION DISPLACEMENT, µm |
|---|---|---|
| 1 — vertical, front left side | 3.51 → 1.69 | 66.7 → 46.2 |
| 2 — horizontal, front left side | 4.38 → 3.05 | 72.9 → 65.3 |
| 3 — axial direction, front left side | 4.03 → 1.17 | 34.1 → 32.8 |
| 4 — vertical, rear left side | 3.42 → 1.54 | 74.4 → 57.7 |
| 5 — horizontal, rear left side | 6.33 → 1.94 | 98.3 → 69.7 |
| 6 — axial direction, rear left side | 3.22 → 1.06 | 70.6 → 38.1 |
| 7 — vertical, front right side | 3.79 → 2.30 | 33.9 → 36.5 |
| 8 — horizontal, front right side | 4.34 → 1.74 | 51.9 → 35.8 |
| 9 — axial direction, front right side | 4.64 → 1.45 | 84.2 → 43.9 |
| 10 — vertical, rear right side | 4.08 → 1.33 | — |
| 11 — horizontal, rear right side | 5.69 → 2.14 | 101.0 → 75.7 |
| 12 — axial direction, rear right side | 4.81 → 1.23 | 64.7 → 37.5 |
SENDIG 911 vibrometer, engine speed 250 rpm. Vibration velocity decreased at all 16 control points of the engine and the compressor.
KT-6 compressor housing vibration — 4 control points
| MEASUREMENT POINT | VIBRATION VELOCITY, mm/s | VIBRATION DISPLACEMENT, µm |
|---|---|---|
| 1 — vertical, front side of the block | 4.04 → 1.15 | 51.5 → 38.0 |
| 2 — horizontal, front side of the block | 3.76 → 1.64 | 39.6 → 17.4 |
| 3 — vertical, rear side of the block | 3.9 → 1.69 | 55.1 → 36.7 |
| 4 — horizontal, rear side of the block | 3.82 → 2.61 | 51.2 → 28.7 |
Measured with the same vibrometer and in the same mode as for the engine block.
Conclusions of the report
Current equivalent
- Revitalizant gel for diesel enginesDiesel engines
- Revitalizant gel for compressors and bearingsCompressors · bearings · spindles
How such units are treated:
About this result:
Method for this machine:
Limits of this report: The results relate to a TEM 15 shunting locomotive with a D-49 diesel engine and a KT-6 compressor under the stated measurement modes; on other equipment and under different operating conditions the figures may differ.