BACKGROUND: When springs are used, a cyclic load of “compression - decompression” occurs, which results in gradual decrease its elastic properties, performance, microcracks and destruction. Moreover, if these the valve mechanism internal combustion engine, then they subject to heating, intensifies processes loss elasticity In practice, spring control often comes down external inspection, assessment geometric parameters dynamic testing. The latter requires expensive equipment long time for...

The aim of the research was to compare a classical (turning) machining and an abrasive-free ultrasonic (bufo) at three different materials. surface evaluated on basis Olympus LEXT 3100 measuring roughness hardness HV5. An set I - 4 consisted generator, power output 630 W working frequency 22 kHz ± 10%, used for research. Main results are: increasing HV5 machined surface, lowering parameters Ra application machining, Rz not statistically proved machining. It is possible say according visual...

The design features of shredders and the type feedstock have a decisive influence on quality finished product leveling its granulometric composition.Inadequate prepared feed reduces effectiveness using forage grains up to 30 %.For various species age categories animals poultry, it is necessary produce mixed fodders, nutritionally balanced in particle size.This article presents methodology for assessing efficiency process grinding grain materials based actual performance technological...

Abstract In order to ensure the best digestibility of feed, all nutrients included in their composition should be given animals crushed form. Particle size feed is different for species and age categories animals. The most common “shock” crushers give up 30% dust fraction 20% underground one. Nowadays, impact centrifugal-rotor grain that use a “slice-chipping” are effective ones. small-sized horizontal crusher, which constructive technological scheme grinding fixed patents Russian...

The aim of the research was to compare a classical (turning) machining and an abrasive-free ultrasonic (bufo) at aluminium alloy. An set I - 4 consisted generator, power output 630 W working frequency 22 kHz ± 10%, used for research. Three different cutting fluids containing nanoparticles were compared finishing. A rise hardness HV0.05 HBW2.5/62.5 occurred application technology alloy by various nanoparticles. It is obvious from results that considerable fall surface roughness parameters Ra Rz using

Renouncement and downtime of combine harvesters in operation lead to significant financial losses.One the most important reasons for this machinery is failure key connections, which account up 10.5 % total number failures.The main disadvantage connection that keyway a stress concentrator reduces fatigue strength parts, leading an asymmetric deformation shaft hub.The wear individual parts fixed mainly due gradual surface destruction material accompanied by separation particles, changing...

The service life of the working bodies soil-cultivating machines depends on properties processed environment. influence soil moisture change in its physical state and wear capacity is analyzed. factors reduction loss performance disc coulters grain seeders are established. It proposed to assess by coulter coefficient kрс. An analytical dependence kрс intensity "normal" "wear" periods obtained. At kрс=0.25, ratio 1:3. kрс=0.75, this 3:1. original experimental setup was created studies...

Abstract Increasing the efficiency of diesel equipment operation is primarily associated not only with increasing reliability its main components, assemblies, joints and parts, but also reducing costs fuel consumption during production processes. At same time, operating experience shows that a significant share fully loaded, often up to 40…50%. The transient unsteady modes arise in this case, as well design features domestic engines, lead an excessive increase unevenness supply through...

Abstract Increasing the efficiency of diesel equipment operation is primarily associated not only with increasing reliability its main components, assemblies, joints and details, but also reducing costs fuel consumption during production processes. At same time, operating experience shows that a significant share time fully loaded, often up to 40 … 50%. The transient unsteady modes arise in this case, as well design features domestic engines, lead an excessive increase unevenness supply...

Abstract The paper describes a method for improving the reliability of machine-tractor unit in technological processes. Two approaches aimed at least reliable elements are analyzed. To improve power units, it is proposed to spray SiO 2- based thin-film coatings on working surfaces plunger pairs. calculations show that an increase service life pairs 2 ... 2.5 times higher than serial ones. machines, example improved cultivator paws due modernization their design provided. Results comparative...

Sowing is carried out in certain agronomic terms, and up to 80 % of grain seeders produced at present are equipped with double-disc coulters.Excessive stickiness the soil causes sticking on tools, dried leads disruption formation grooves, increased wear tools.Each these factors normal functioning coulters increases traction resistance machine-tractor unit.To combat high adhesion metal, various coatings used.The most widely used polymeric materials, such as fluoroplastic polyethylene.There a...

When considering the work of key connections with broken geometry working surfaces units, we can observe that often is not properly fixed in groove shaft and sleeve when rotating coupling, it skews perceives transmitted torque unevenly at some point, which a stress concentrator. (Research purpose) The research purpose to increase durability keyways by preventing failures through quality control manufacture their basic units. (Materials methods) Authors have noted standard keyway has three...

Abstract Plate type vacuum pumps are used in various industries and agriculture due to their high specific efficiency simple design. The disadvantage of this pump is a low inter-repair resource, which caused by an increase internal gas flows wear the main friction pair “cast iron-textolite”. To modernize design plate-type pump, authors proposed using anti-friction material PTFE, as result, replacing iron-textolite” with pairs iron-PTFE” “textolite - PTFE”. Therefore, article presents results...

Grain crops, after appropriate processing, are used as the main human food product, feed for farm animals and raw materials many industries (seed production, deep processing of grain, others).For each specific direction, corresponding machines their complexes used.The most important operation grain is grinding.This process accompanied by formation an over-grinded flour fraction presence in finished product intact, not destroyed, grains, which violates particle size uniformity distribution up...

Material of workpiece and structural parameters the device for combination machining surface plastic deformation have a significant effect on roughness unstable components such as hollow cylinder.

The use of a device for combined machining and surface plastic deformation with specified rolling force has great advantages when nonrigid parts such as hollow cylinder.

Additional rotation tools in the turret lathe is using devices with complex kinematics, so proposed and considered a simple reliable construction of axial drive tool for lathes.

Cutting modes and structural parameters of the device for combined cutting processing surface plastic deformation have a significant impact on roughness processed unstable parts type hollow cylinder.

Today, the use of compressed natural gas as fuel for internal combustion engines is becoming a global trend. Stavropol Krai one leaders among all regions Russia in this matter, level gasification which 99.8 percent. Such high region serves catalyst leadership motor fuel. (Research purpose) The research purpose determining effectiveness transfer mobile agricultural machinery and stationary equipment to engine (Materials methods) Developed program "Calculation efficiency conversion diesel...