Тракторы и сельхозмашины

by A.M. Yegozhev, Ye.A. Polischuk (Kabardino-Balkaria State Agricultural Academy)
Contact information: A.M. Yegozhev, artyr-egozhev@yandex.ru

Summary
A method for calculating the complex rotor dynamic stability, taking into account the distribution of mass of the shaft along the length and the variable-rate rigidity, is presented.

Keywords:
rotor dynamics, adjusted calculation.

by G.D. Kokorev, I.A. Uspensky, I.N. Nikolotov, Ye.A. Kartsev (Ryazan State Agrotechnological University)
Contact information: G.D. Kokorev, kgd5408@rambler.ru

Summary
A method of forecasting the technical state of mobile agricultural equipment, based on the laws of change in the probability of failures in units under test, is suggested.

Keywords:
mobile agricultural equipment, technical diagnosis, technical state forecasting, diagnostic parameters, unit under test, control frequency.

by P.I. Kuznetsov, N.A. Bezrodnov, T.G. Konstantinova, A.Ye. Novikov (All-Russian Research Institute of Irrigated Cropping)
Contact information: tel. 8 (8442) 411831; vniioz@bk.ru

Summary
The influence of diameter and length of the polyethylene pipelines of Bauer drum-type machines (Rainstar models) for strip irrigation on specific capital costs is considered. Three schemes of an irrigated field are analysed. Optimal diameters and lengths of polyethylene pipelines are established, which correspond to the minimum specific costs.

Keywords:
irrigation systems, specific capital costs, optimal parameters, polyethylene pipeline, pressure, water discharge, sprinkling machine.

by I.P. Dobrolyubov (Novosibirsk State Agrarian University)
Contact information: tel. 8 (383) 2673944

Summary
The use of integral indices in the measuring expert system of internal combustion engine is concidered.

Keywords:
internal combustion engine, technical state, tests, diagnostic parameters.

by P.A. Avdeyev (Voronezh State Agrarian University)
Contact information: avdej84@mail.ru

Summary
The cells are filled with pelleted seeds in reverse direction, that is from the center of the disc to its periphery, when the internal space of distributor is already filled with seeds. In this case the centrifugal force doesn’t block the seeds, but helps their penetration in every point of the disc. The application of this feed method considerably widens the filling zone and contributes to improve the seed distributor’s work.

Keywords:
seed distributor, pelleted seeds, cells, speed.