Substantiation of the algorithm for controlling the adjustable electric drive of roller crusher-grinders of forage grain

In recent years, along with the traditional technology of dry grain storage and grinding before feeding, the technology of preserving crushed grain at an early stage of ripeness is widely used. These technologies do not replace each other, but objectively complement each other, that is, they exist in parallel and require appropriate equipment for their implementation. To do this, it is necessary to use universal energy-efficient equipment for crushing feed grain with a high annual load. As such equipment, it is advisable to use roller crusher-grinders with individual electric drive of the rollers. The process of crushing and grinding grain is significantly affected by the physical and mechanical properties of the grain and the design and technological parameters of roller crusher-grinders. Analysis of the strength properties of the grain shows that in order to reduce the energy intensity the process of crushing the grain must be carried out at a higher moisture content and the deformation rate should be as high as possible. When a certain circumferential speed of the rollers is reached, the process reaches both maximum performance and minimum energy consumption. The control algorithm is based on changing the speed of the rollers stepwise from a lower speed to a higher one. In this case, at each stage a metered portion of grain is crushed between the upper and lower flaps of the vertical loading shaft, and the time by which this portion will have been worked out is measured. This procedure is carried out by changing the speed from lower to higher until the speed at which crushing of the portion will take the minimum time is determined. If the technological process requires a grain grinding mode, the speed of one of the rollers increases from the optimal crushing rate. The speed increase occurs as long as the recu-peration current in the parallel-connected DC buses of the frequency converters increases.

1. Mel'nikov S. V. Mekhanizatsiya i avtomatizatsiya zhivotnovodcheskikh ferm. [Mechanization and automa-tion of livestock farms]. Leningrad: Kolos  Leningradskoe otd-nie, 1978. 560 p.

2. Kukta G. M. Tekhnologiya pererabotki i prigotovleniya kormov. [Technology of processing and prepara-tion of feed]. Moscow: Kolos, 1978. 240 p.

3. Merko I. T. Sovershenstvovanie tekhnologicheskikh protsessov sortovogo pomola pshenitsy. [Improvement of technological processes of varietal wheat grinding]. Moscow: Kolos, 1979. 189 p.

4. Chigarev O. Yu., Prishchepova E. M. Nekotorye podkhody v voprosakh deformirovaniya zerna. [Some approaches in the issues of grain deformation. Agropanorama] Agropanorama. 2013;(6):18-20. URL: https://rep.bsatu.by/handle/doc/7041

5. Ishlinskiy A. Yu. Prikladnye zadachi mekhaniki. [Applied problems of mechanics]. Moscow: Nauka, 1986. Vol.1. pp. 372.

6. Syrovatka V. I., Sergeev N. S. Izyskanie energosberegayushchikh rabochikh organov dlya izmel'cheniya semyan rapsa i furazhnogo zerna. [Research of energy- saving working bodies for grinding rapeseed and feed grain]. Nauchnye trudy GNU VNIIMZh Rossel'khozakademii. 2008;(3):3-12.

7. Syrovatka V. I. Ispol'zovanie vysokovlazhnogo furazhnogo zerna v zhivotnovodstve. [Use of high- moisture feed grain in animal husbandry]. Trudy GOSNITI. 2007;(100):127-131. URL: https://www.elibrary.ru/item.asp?id=15004055

8. Romaliyskiy V. S. Innovatsionnaya tekhnika i resursosberegayushchie tekhnologii dlya prigotovleniya kombikormov v khozyaystvakh. [Innovation technology and resource-saving technologies for preparation of mixed fodders at farms]. Vestnik Vserossiyskogo nauchno-issledovatel'skogo instituta mekhanizatsii zhivotnovodstva. 2016;(3(23)):158-162.

9. Sysuev V. A., Kazakov V. A. Novye tekhnologii posleuborochnoy tekhnologii posleuborochnoy pererabotki zerna i polucheniya vysokokache-stvennykh kormov dlya zhivotnovodstva. [New technologies of post-harvest processing of grain and obtaining of high-quality fodders for animal husbandry]. Agrarnaya nauka Evro-Severo-Vostoka = Agricultural Science Euro-North-East. 2015;(5(48)):73-79. URL: https://www.elibrary.ru/item.asp?id=24113608

10. Sysuev V. A., Savinykh P. A., Kazakov V. A. Dvizhenie zernovki v podvodyashchem kanale plyushchilki zerna. [Theoretical research and design development of a two-stage grain crusher]. Vestnik Vserossiyskogo nauchno-issledovatel'skogo instituta mekhanizatsii zhivotnovodstva. 2015;(4(20)):19-24. (In Russ.).

11. Odegov V. A., Savinykh P. A., Kazakov V. A., Polyakov S. M. Issledovanie vliyaniya diametra i okruzhnoy skorosti val'tsov s gladkoy rabochey poverkhnost'yu na protsess dvukhstadiynogo plyushcheniya. [A study of the influence of the diameter and the circumferential speed of the rollers with a smooth working surface for the two-stage crimping process]. Vestnik NGIEI = Bulletin NGII. 2018;(1(80)):44-55. URL: https://www.elibrary.ru/item.asp?id=32324573

12. Savinykh P. A., Kazakov V. A., Moshonkin A. M. Teoreticheskie issledovaniya i konstruktivnaya razrabotka dvukhstupenchatoy plyushchilki zerna. [Theoretical research and design development of a two-stage grain crusher]. Vestnik Vserossiyskogo nauchno-issledovatel'skogo instituta mekhanizatsii zhivotnovodstva. 2017;(3(27)):91-97.

13. Savinykh P. A., Kazakov V. A., Moshonkin A. M. Eksperimental'no-teoreticheskie issledovaniya pita-yushchego ustroystva plyushchilki zerna. [Experimental and theoretical studies of the feeding device of the grain crush-er]. Vestnik Vserossiyskogo nauchno-issledovatel'skogo instituta mekhanizatsii zhivotnovodstva. 2019;(3(35)):61-68.

14. Odegov V. A., Komkin A. S., Shilin V. V. Issledovanie vliyaniya okruzhnoy skorosti val'tsov i vlazhnosti materiala na osnovnye pokazateli rabochego protsessa dvukhstupenchatogo val'tsovogo stanka. [The influence of circumferential velocity of rollers and material moisture content on the main indicators of workflow of a two-step roller machine]. Permskiy Agrarnyy Vestnik = Perm Agrarian Journal. 2018; (1(21)):28-33. URL: https://www.elibrary.ru/item.asp?id=32664910

15. Pun'ko A. I., Romanchuk D. I., Savinykh V. N., Gud A. N. Analiz konstruktsiy val'tsovykh izmel'chiteley zernofurazha. [The analysis of designs of grain fodder roller]. Mekhanizatsiya i elektrifikatsiya sel'skogo khozyaystva. Mezhvedomstvennyy tematicheskiy sbornik. 2011;(45): 172-178. URL: https://www.elibrary.ru/item.asp?id=30716940

16. Savinykh V. N., Romanchuk D. I., Vorob'ev N. A. Rezul'taty ispytaniy plyushchilki vlazhnogo zerna PVZ-10. [The results of tests damp grain roller mill PVZ-10]. Mekhanizatsiya i elektrifikatsiya sel'skogo khozyaystva. Mezhvedomstvennyy tematicheskiy sbornik (k 80-letiyu so dnya obrazovaniya NAN Belarusi). 2008;(42): 210-214. URL: https://www.elibrary.ru/item.asp?id=35369746

17. Vorob'ev N. A. Teoreticheskie issledovaniya proizvoditel'nosti val'tsovoy plyushchilki. [Theoretical studies of productivity of the roller crusher]. Agropanorama. 2008;(2):45-48. URL: https://rep.bsatu.by/handle/doc/1263

18. Dayneko V. A., Prishchepova E. M. Matematicheskoe modelirovanie moshchnosti val'tsovoy plyushchilki zerna. [Mathematical modeling of power of roller crusher of grain]. Ukrainian Food Journal. 2012; (3):40-49. URL: http://www.ufj.ho.ua/

19. Dayneko V. A., Prishchepova E. M. Teoreticheskoe obosnovanie proizvoditel'nosti val'tsovoy plyushchilki-izmel'chitelya. [Theoretical justification of the productivity of the roller crusher-grinder]. Agropanorama. 2012;(2):14-28. URL: https://rep.bsatu.by/handle/doc/7245

20. Shilo I. N., Vorob'ev N. A., Prishchepova E. M. K obosnovaniyu moshchnosti privoda val'tsov plyushchilki. [To substantiate the drive power of the crusher rollers]. Agropanorama. 2008;(3):25-28. URL: https://rep.bsatu.by/handle/doc/1280

21. Dayneko V. A., Prishchepova E. M. K voprosu povysheniya proizvoditel'nosti i snizheniya udel'nykh energozatrat val'tsovoy plyushchilki zerna. [On the issue of increasing productivity and reducing specific energy consumption of the grain roller crusher]. Agropanorama. 2013;(2):24-27. URL: https://rep.bsatu.by/handle/doc/6398?mode=full

22. Prishchepov M. A., Gurin V. V., Prishchepova E. M., Ivanov D. M. Control device for interconnected frequency-controlled asynchronous electric drives with electric energy recovery (options): patent on the image: patent Republic of Belarus, no. 21618, 2018. URL: https://ncip.by/upload/iblock/f5a/f5a1dfcb7efc24c148aeebb6b129fa29.pdf

23. Prishchepov M. A., Gurin V. V., Prishchepova E. M., Ivanov D. M. Method for controlling interconnected electric drives with electric energy recovery: patent on the image: patent Republic of Belarus, no. 19919, 2016. Afitsyyny byul. Nats. tsentr intelektual. ulasnastsi. 2016. URL: https://ncip.by/upload/iblock/7b1/7b122278043fa35fd69d4258c4cb09ee.pdf

24. Dayneko V. A., Gurgenidze I. I., Prishchepova E. M. Obosnovanie tselevoy funktsii i kriteriya optimizatsii konstruktivnykh i tekhnologicheskikh parametrov sistemy elektroprivoda val'tsovykh plyushchilok-izmel'chiteley zerna. [Substantiation of the target function and criterion for optimizing the design and technologi-cal parameters of the electric drive system of roller grain crusher-grinders]. Agropanorama. 2015;(4):30-35. URL: https://rep.bsatu.by/handle/doc/4176

25. Prishchepova E. M., Dayneko V. A. Method for controlling interconnected drives of roller grain crusher-grinders with electric energy recovery: patent Republic of Belarus, no. 21847, 2018. URL: https://ncip.by/upload/iblock/b43/b4369672f12b7716e201e2bcd49634a5.pdf