Laboratory Test of a Gear Hydraulic Pump during the Application of an Environmentally Friendly Hydraulic Fluid with Constant Pressure and Temperature
Abstract
:1. Introduction
2. Materials and Methods
2.1. Conditions for Measuring Flow Characteristics
2.2. Hydraulic Fluid Contamination Measurement
- Kinematic Viscosity—Spectro VISC Q300 (Spectro Scientific, Chelmsford, MA, USA),
- Acidity number—FluidScan Q1000 (Spectro Scientific, Chelmsford, MA, USA) and Titra—Lube Tan Test Kit (DEXSIL, Hamden, CT, USA).
3. Results
4. Conclusions
- (1).
- At the beginning of the laboratory test, the flow efficiency of the gear hydraulic pump at rated speed was 90.85%. After 25 h, the flow efficiency reached 98.82%. The above fact demonstrates that, after 25 h, the break-in phase of the gear hydraulic pump was completed.
- (2).
- After the completion of the laboratory test (100 h), the flow efficiency of the tooth hydraulic pump reached 99.42%. Compared to the time of measuring the flow characteristics after 25 h, there was a slight decrease in the flow efficiency of the tooth hydraulic pump, but this decrease is within the inaccuracy of the flow meter shown in Figure 2.
- (3).
- The largest increases in pollutant elements were found for potassium (K), tin (Sn) and sodium (Na). The above elements are mainly found in bearing and sleeve deposits. The increase is not significant, hence only operational wear of the gear hydraulic pump occurs.
- (4).
- We can confirm the presence of cutting, sliding, fatigue and non-metallic particles based on the LaserNet Fines evaluation.
- (5).
- The kinematic viscosity at 40 °C and at 100 °C did not exceed the limit value of 20% set by ISO 15380:2016.
- (6).
- The acid number of the hydraulic fluid did not exceed the limit value given by ISO 15380:2016.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Parameter | Unit | Value | |
---|---|---|---|
Actual displacement | cm3 | 17.24 | |
Inlet pressure | min. | MPa | −0.03 |
max. | MPa | 0.05 | |
Maximum pressure | MPa | 29 | |
Speed | nominal | min−1 | 1500 |
minimum | min−1 | 350 | |
maximum | min−1 | 3200 | |
Flow at nominal speed | min−1 | 23.5 | |
Maximum input power | kW | 33.6 | |
Nominal input power | kW | 16.1 | |
Volumetric flow rate at maximum speed | dm3.min−1 | 54.3 | |
Volumetric flow rate at nominal speed | dm3.min−1 | 23.2 | |
Volumetric efficiency | % | 92 |
Speed, min−1 | Count of Hours | ||||
---|---|---|---|---|---|
0 | 25 | 50 | 75 | 100 | |
500 | 7.48 | 7.73 | 7.86 | 7.95 | 7.99 |
750 | 11.48 | 11.74 | 11.91 | 12.12 | 12.25 |
1000 | 15.53 | 15.79 | 15.91 | 16.19 | 16.39 |
1250 | 19.62 | 19.96 | 20.34 | 20.36 | 20.52 |
1500 | 23.70 | 23.88 | 23.99 | 24.58 | 24.73 |
1750 | 27.75 | 28.42 | 28.62 | 28.85 | 29.00 |
2000 | 31.77 | 32.98 | 33.08 | 33.28 | 33.34 |
2250 | 35.64 | 37.29 | 37.38 | 37.49 | 37.53 |
2500 | 39.62 | 41.47 | 41.51 | 41.67 | 41.72 |
2750 | 43.67 | 45.74 | 45.80 | 45.94 | 46.10 |
Number of Hours Worked | Abrasion Particles (20 µm–100 µm) | |||
---|---|---|---|---|
Cutting Particles | Slippery Particles | Fatigue Particles | Non-Metallic Particles | |
0 | 24.3 | 27.2 | 21.3 | 31.8 |
25 | 25.6 | 30.1 | 23.8 | 33.1 |
50 | 28.8 | 30.2 | 24.2 | 35.7 |
75 | 29.1 | 35.3 | 24.6 | 36.1 |
100 | 30.2 | 36.1 | 28.7 | 38.5 |
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Kosiba, J.; Tkáč, Z.; Jablonický, J.; Čurgaliová, G.; Tulík, J.; Halenár, M. Laboratory Test of a Gear Hydraulic Pump during the Application of an Environmentally Friendly Hydraulic Fluid with Constant Pressure and Temperature. Lubricants 2024, 12, 304. https://doi.org/10.3390/lubricants12090304
Kosiba J, Tkáč Z, Jablonický J, Čurgaliová G, Tulík J, Halenár M. Laboratory Test of a Gear Hydraulic Pump during the Application of an Environmentally Friendly Hydraulic Fluid with Constant Pressure and Temperature. Lubricants. 2024; 12(9):304. https://doi.org/10.3390/lubricants12090304
Chicago/Turabian StyleKosiba, Ján, Zdenko Tkáč, Juraj Jablonický, Gabriela Čurgaliová, Juraj Tulík, and Marek Halenár. 2024. "Laboratory Test of a Gear Hydraulic Pump during the Application of an Environmentally Friendly Hydraulic Fluid with Constant Pressure and Temperature" Lubricants 12, no. 9: 304. https://doi.org/10.3390/lubricants12090304