Mechanization in agriculture & Conserving of the resources Vol. 60 (2014), Issue 3

SELF-PROPELLED HARVESTER WITH AN ELECTRICAL TRACTION DRIVE IN COMPARISON TO THE HYDRAULIC TRACTION DRIVE

pg(s) 3-5

Sugar Beet Harvesters belong to self-propelled agricultural machinery for trimming, lifting, cleaning and collecting sugar beets. Like most harvesting machines such vehicles are equipped with hydrostatic traction drives to ensure a continuous variable speed adjustment for the harvesting process. These drives are state of the art but rather moderate in efficiency. For further enhancement of effi- ciency the hydrostatic system was replaced by a diesel-electric traction drive. The two different systems were tested and compared in simula- tion and field. As a result, improved driving performance at reduced fuel consumption could be achieved.

RESEARCH ON RELIABILITY OF PLOWS OPERATING IN MOUNTAINOUS CONDITIONS

pg(s) 6-8

Characteristics of operational reliability of agricultural plows, operating in mountainous conditions were determined on the basis of theoretical and experimental studies. It is shown that these conditions adversely affect their workability, cause intense wear of working parts of plows, and lead to failures. For this purpose, special coefficient was introduced which takes into account the impact of mountainous conditions on reliability.

A structural-logical scheme for reliability calculations was determined, and at the level of invention, a fundamentally new plow with variable widths was developed, allowing a better use of its operation in the mountainous conditions.

PERFORMANCE ANALYSES OF WIND MACHINES OF DIFFERENT POWER CAPACITIES USED FOR FROST PROTECTION IN AN ORCHARD

pg(s) 9-11

In this research, the efficiencies of two different wind machines which were set up for the frost protection in orchard have been investigated. Wind machines are located in 150 da lemon orchard in the south of Turkey. The land is belong to Yuregir district of Adana province. Citrus production is one of the widely-held agricultural activities, and it has economic importance for this region. Frost damages occur from time to time on fruit trees due to the climatic conditions. It is a serious problem for fruit growers, and causes economic losses.

Wind machines are used in the region for reducing this risk. Power capacities of the wind machines used in the lemon orchard were 130 and 172 hp. Temperature and wind speed were measured at the different distances and heights in orchard for the determination of wind machine efficiency. As a result, it was determined that the moving air layer had prevented the trees from frost, and air temperature of the orchard increased between 0.83^oC – 2.11^oC.

A RESEARCH ABOUT COEFFICIENT AND MOMENT OF FRICTION DURING INTERACTION OF DEPOSITED LAYERS OF IRON PARTS OF AGRICULTURAL AND TRANSPORTING MACHINERY EQUIPMENT

Nikolov M.

pg(s) 12-14

The dynamics of moment and coefficient of friction change is established by experimental research of applied layers upon iron and steel parts through vibrating gas metal arc overlaying. It was established that such layers has a insignificant change of the moment of interaction within the period between 4-th and 14-th hour with rate of 5,5 to 6,5 Ncm which is a sign about transition into a period of estab- lished wear regime within shorter time.

ADAPTATION OF AN EXISTING SOLUTION FOR WORK IN NEW CONDITIONS – AN ANALYSIS OF THE METHODOLOGY

pg(s) 15-17

The analysis of the problems to be solved in the engineering practice shows that the adaptation of an existing solution to work in new conditions is one of the most common design problems. For harvesting soybeans and other row crops in the country are widely used headers HPS produced by METAREM – AD Pavlikeni. They were created in connection with the introduction of technology for row harvesting of soybeans in our agricultural production, which is well known and widespread in the world practice. Through the analysis of the collaboration of TISEM – AD, Ruse and METAREM – AD on creating headers HPS, the contents of the engineering preparation for the production, is clarified. On this basis, a model (algorithm) to solve the engineering task of adapting an existing solution to work in new conditions is proposed.

DESIGN OF PLANTING CLIP FOR GRAFTING APPLES ROOTSTOCKS

pg(s) 18-19

The paper presents the design of planting clip for grafting apples rootstocks. The design of clip provides stable clip and minimum mechanical damages of grafts.

International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"