Vol 80, No 3 (2013)

Issues of imported tractors for rural areas deliveries for Russian market over 2011 year are considered.

Results of comparative testings of an experimental block-module cultivator and its analogues КПС-4 and Sunflower-5 are given.

Construction of a shrubbery topper intended for the regenerative pruning is examined. Its specification and information about laboratory and field tests are given.

A method of sectionally-continuous tractor speed variation is examined, based on the rational choice of sufficiently short diapason of diesel compensative parameter. In these conditions power doesn’t decrease below nominal one and fuel economy improves by decrease of diesel rotation rate.

Results of investigations in the field of propulsion engineering are given, aiming the obtainment of improved multispan units performance, their operating life, reliability factor, accuracy.

Procedure of simulation testings of a felling-skidding-processing machine in the actual natural conditions is presented and this process is stated.

Calculation method of resistance and moment of resistance to soil cutting in dependence on rotation angle of working organ is developed. This method can be transferred mainly to other rotation working organs.

Results of fatigue tests of steel 45 samples in the air and in corrosive mediums simulating the atmospheric exposure on shafts and their joints are examined. Functions of corrosion coefficients are suggested and nomograms for the application of these coefficients’ probabilistic values in improved calculations of corrosive fatigue resistance of constructive elements are drawn.

A new method of hydromechanical transmission friction clutches diagnostics is suggested. Results of theoretical research were confirmed experimentally. Algorithm of technical state estimation of hydromechanical transmission friction clutches in bench tests conditions is given.

Tractors manufactured by Polish companies Pronar and Ursus SA, their constructive features and key indicators of technical level are examined.

На встрече руководства ЦВК «Экспоцентр» и ТПП РФ с представителями СМИ, состоявшейся 30 января в Экспоцентре, обсуждались результаты деятельности ЦВК «Экспоцентр», а также новые проекты компании и ее планы на будущее.