Required power calculation to small rotor tip drive

Introduction. The problem of accelerating and reducing the cost of road construction without reducing their quality can be solved by creating a complex of continuous units. The units, following each other, carry out the whole range of works aimed at the construction of roads. One of the elements of the continuous unit that forms the cuvette is a direct-flow rotary ripper. It was revealed that for excavation near the axis of rotation of the rotor of a direct-flow rotary ripper, a small rotor with a higher angular velocity coaxially with a large rotor should be installed. The small rotor contains of a small rotor tip with spiral knives, two teeth and two knives. Previously, the structural layout of the small rotor was determined, the height of the spiral of the spiral knife was calculated. By analyzing the interaction of the elements of the working bodies of the direct-flow rotary ripper with the soil, it is necessary to identify the power on the drive of the tip of the small rotor.

The method of research. The calculation methods of power for the introduction of a cone into the ground, power for friction of the cone on the ground, power for the introduction of the end of the spiral knife into the ground, power for the introduction of a spiral knife into the ground in the radial direction, power to overcome the friction of the spiral knife on the ground, power to overcome the force of resistance of the soil to the rotation of the spiral knife have been developed.

Results. On the basis of the developed methods, the parameters were calculated. From the spatial models of the forces of interaction with the soil of the spiral knife, their resultant, normal forces, the forces of resistance of the soil to the rotation of the spiral knife are revealed, the friction forces of the soil on the rear surfaces of the first and second turns of the spiral knife are calculated. The total power for the drive of the tip of the small rotor and the volumetric energy for the introduction of a cone with a spiral knife into the ground are calculated.

Conclusion. The total power for the drive of the tip of the small rotor includes power for the introduction of the cone into the ground, power for friction of the cone on the ground, power for the introduction of the end of the spiral knife into the ground; power for the introduction of a spiral knife into the ground in the radial direction, power to overcome the friction of the spiral knife on the ground, power to overcome the force of resistance of the soil to the rotation of the spiral knife. The required power to drive the tip of the small rotor is 1127 W. The volumetric energy for the introduction of a cone with a spiral knife into the ground is 16.9 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. Moskva. 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/10.26518/2071-7296-202219-6-800-813.

4. Karasjov G. N. Opredelenie sily rezanija grunta s uchjotom uprugih deformacij pri razrushenii [Definition of the cutting force of soil considering elastic deformation at fracture]. Stroitel’nye i dorozhnye mashiny. 2008; 4: 36-42. (In Russ)

5. Karnauhov A. I., Orlovskij S. N. Opredelenie zatrat udel’noj jenergii na process rezanija lesnyh pochv torcevymi frezami [Costing of specific energy on the cutting process of forest soils end mills]. Stroitel’nye i dorozhnye mashiny. 2010; 1: 20-22. (In Russ)

6. Kravec I. M. Opredelenie kriticheskoj glubiny rezanija pri kombinirovannom rezanii gruntov gidrofrezoj [Determine critical cutting depth when combined cutting soils gidrofrezoj]. Stroitel’nye i dorozhnye mashiny. 2010; 5: 47-49. (In Russ)

7. Kirillov F. F. Determinirovannaja matematicheskaja model’ vremennogo raspredelenija tjagovogo usilija dlja mnogorezcovyh rabochih organov zemlerojnyh mashin [Deterministic mathematical model of the temporal distribution of traction for mnogorezcovyh working bodies of earthmoving machines]. Stroitel’nye i dorozhnye mashiny. 2010; 11: 44-48. (In Russ)

8. Berestov E. I. Vlijanie trenija grunta po poverhnosti nozha na soprotivlenie rezaniju [Influence of friction of soil on the surface of the knife cutting resistance]. Stroitel’nye i dorozhnye mashiny. 2010; 11: 34-38. (in Russ)

9. Balovnev V. I., Nguen Z. Sh. Opredelenie soprotivlenij pri razrabotke gruntov ryhlitelem po integral’nomu pokazatelju prochnosti [Identification of resistances when designing primers Ripper by a combined indicator of strength]. Stroitel’nye i dorozhnye mashiny. 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. 36:115128.

11. Liu X., Liu P. Experimental research on the compressive fracture toughness of wing fracture of frozen soil. Cold Regions Science and Technology. 2011; 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. Issledovanie upravljaemyh nozhevyh sistem zemlerojno-transportnyh mashin [Study of guided knife systems of ground-moving vehicles]. Stroitel’nye i dorozhnye mashiny. 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. Chmil’ V. P. Nasosno-akkumuljativnyj privod ryhlitelja s avtomaticheskim vyborom ugla rezanija [Pump-accumulating ripper drive with automatic cutting angle selection]. Stroitel’nye i dorozhnye mashiny. 2016; 11: 18-20. (In Russ.)

18. Kabashev R. A., Turgumbaev S. D. Jeksperimental’nye issledovanija processa kopanija gruntov rotorno-diskovymi rabochimi organami pod gidrostaticheskim davleniem [Experimental studies of the process of digging soils by rotary-disk working organs under hydrostatic pressure]. Vestnik SibADI. 2016; 4: 23-28. (In Russ.)

19. Sjomkin D.S. O vlijanii skorosti rabochego organa na silu soprotivlenija rezaniju grunta [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.)

20. Konstantinov Ju. V. Metodika raschjota soprotivlenija i momenta soprotivlenija rezaniju pochvy prjamym plastinchatym nozhom frezy [The method of calculating resistance and the moment of resistance to soil cutting with a straight plate cutter knife]. Traktory i sel’hozmashiny. 2019; 5: 31-39. (In Russ.)

21. Parhomenko G. G., Parhomenko S. G. Silovoj analiz mehanizmov peremeshhenija rabochih organov pochvoobrabatyvajushhih mashin po zadannoj traektorii [Power analysis of the mechanisms of movement of working bodies of soil processing machines on a given trajectory]. Traktory i sel’hozmashiny. 2018; 1: 47-54. (In Russ.)

22. 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/10.26518/2071-7296-202320-2-194-203

23. 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. EDN: TTTPPI