Minor rotor tines and knives soil interaction. Total power calculation for minor rotor drive

Introduction. The problem of fast and high-quality road construction, when economic facilities and settlements are spatially separated, located at a considerable distance from each other, cannot be solved without the use of a complex of continuous units. An important element of the continuous unit forming the ditch and the unit for tunneling is the direct-flow rotary ripper. Current theoretical studies are not sufficient to calculate the interaction with the soil of the elements of a direct-flow rotary ripper. The lack of theoretical justification for the parameters of direct-flow rotary rippers hinders their use. Therefore, there is a need for theoretical research to identify the geometric, kinematic, dynamic and energy parameters of structural elements.

The method of research. Methods for calculating the required power to drive the teeth, to separate the seam from the soil mass with knives and divide it into fragments, to overcome the inertia force of the incoming soil on two small rotor knives, to accelerate the soil towards the large rotor, to move the soil towards the large rotor, to overcome the friction force of the soil on the front surface of the knives have been developed. The total power required to drive the small rotor corresponds to the sum of the powers: for the introduction of a cone with a spiral knife into the ground, for the drive of the teeth and for the drive of the knives.

Results. On the basis of the developed methods, the parameters were calculated. From the flat and spatial model of the forces of interaction with the ground of the elements of the small rotor, their resultant, their components, and normal forces are revealed. The friction force of the soil on the front surface of the knife is calculated. The total power for the drive of the small rotor and the volumetric energy for the introduction of the small rotor into the ground are calculated.

Conclusion. The energy costs for driving small rotor knives include: energy for separating the reservoir and dividing it into fragments, energy for overcoming the pressure of the soil on the front surface of the knife, energy for accelerating the soil, energy for moving the soil, energy for overcoming the friction force of the soil on the front surfaces of the knives. The total energy cost of the small rotor drive includes the energy required to introduce the spiral knife cone, teeth and knives of the small rotor into the ground. As a result of the calculations, the power to drive the teeth of the small rotor is 735 W, the total power required to drive the small rotor is 2.2 kW. The volumetric energy for the introduction of a small rotor into the ground is 33.1 kJ / cubic meter.

1. Nikolayev V.A. Determination of the energy required to expose the surface of the knife and the bottom of the bulldozer blade to the ground at the beginning of the pass. The Russian Automobile and Highway Industry Journal. 2022;19(4):484-499. (In Russ.) https://doi.org/10.26518/2071-7296-2022-19-4-484-499

2. Nikolaev V. A. Raschjot skorosti prjamotochnogo rotornogo ryhlitelja [Calculation of the speed of the ramjet rotary ripper]. Dorogi i mosty. Sbornik, vypusk 41/1. Moscow. 2019: 35-39. (In Russ.)

3. Nikolayev V.A. Structural layout and operating parameters for a large rotor of a direct-flow bucket wheel type aggregator. The Russian Automobile and Highway Industry Journal. 2022; 19 (6): 800-813. (In Russ.) https://doi.org/10.26518/2071-7296-2022-19-6-800-813.

4. Karasjov G. N. Definition of the cutting force of soil considering elastic deformation at fracture. Construction and road building machinery. 2008; 4: 36-42. (In Russ)

5. Karnauhov A. I., Orlovskij S. N. Costing of specific energy on the cutting process of forest soils end mills. Construction and road building machinery. 2010; 1: 20-22. (In Russ)

6. Kravec I. M. Determine critical cutting depth when combined cutting soils gidrofrezoj. Construction and road building machinery. 2010; 5: 47-49. (In Russ)

7. Kirillov F. F. Deterministic mathematical model of the temporal distribution of traction for mnogorezcovyh working bodies of earthmoving machine]. Construction and road building machinery. 2010; 11: 44-48. (In Russ)

8. Berestov E. I. Influence of friction of soil on the surface of the knife cutting resistance. Construction and road building machinery. 2010; 11: 34-38. (in Russ)

9. Balovnev V. I., Nguen Z. Sh. Identification of resistances when designing primers Ripper by a combined indicator of strength. Construction and road building machinery. 2005; 3: 38-40. (In Russ)

10. Ryabets N., Kurzhner F. Weakening of frozen soils by means of ultra-high frequency energy. Cold Regions Science and Technology. 2003; Vol. 36:115-128.

11. Liu X., Liu P. Experimental research on the compressive fracture toughness of wing fracture of frozen soil. Cold Regions Science and Technology. 2011; Vol. 65:421-428.

12. Talalay P.G. Subglacial till and Bedrock drilling. Cold Regions Science and Technology. 2013; Vol. 86: 142-166.

13. Li Q. Development of Frozen Soil Model. Advances in Earth Science. 2006; 12: 96-103.

14. Atkinson J. The Mechanics of Soils and Foundations. CRC. Press. 2007: 448.

15. Balovnev V. I., Danilov R. G., Ulitich O. Ju. Study of guided knife systems of ground-moving vehicles. Construction and road building machinery. 2017; 2: 12-15. (In Russ.)

16. Nilov V. A., Fjodorov E. V. Razrabotka grunta skreperom v uslovijah svobodnogo rezanija [Ground development with a scraper in free cutting conditions]. Stroitel’nye i dorozhnye mashiny. 2016; 2: 7-10. (In Russ.)

17. Kabashev R. A., Turgumbaev S. D. Experimental studies of the process of digging soils by rotary-disk working organs under hydrostatic pressure. Vestnik SibADI. 2016; 4: 23-28. (In Russ.)

18. Sjomkin D.S. On the impact of the speed of the working body on the force of resistance to ground cutting. Vestnik SibADI. 2017; 1: 37-43. (In Russ.)

19. Konstantinov Ju. V. Methods of calculating the resistance and the moment of resistance to cutting the soil with a straight blade knife cutters. Tractors and agricultural machinery. 2019; 5: 31-39. (In Russ.)

20. Parhomenko G. G., Parhomenko S. G. Force analysis of the mechanisms of tillage machines working elements following a specified path. Tractors and agricultural machinery. 2018; 1: 47-54. (In Russ.) https://doi.org/10.17816/0321-4443-66395

21. Nikolaev V.A. Constructive layout for small rotor of straight-flow rotary ripper. The Russian Automobile and Highway Industry Journal. 2023;20(2):194-203. (In Russ.) https://doi.org/10.26518/2071-7296-2023-20-2-194-203

22. Nikolayev V.A. Turn height calculation for spiral blade. The Russian Automobile and Highway Industry Journal. 2023;20(3):326-336. (In Russ.) https://doi.org/10.26518/2071-7296-2023-20-3-326-336.