Resistance evaluation of nonmetallic elements of pneumatic suspension of machines to influence of negative temperatures

2021 ◽  
Vol 0 (3) ◽  
pp. 41-46
Author(s):  
I. G. Marenkov ◽  
◽  
N. I. Baurova ◽  
Keyword(s):  
Strength Characteristics ◽  
Resistance Evaluation ◽  
Operation Conditions ◽  
Negative Temperatures ◽  
Rubber Part ◽  
Pneumatic Suspension

The operation conditions of nonmetallic elements of the pneumatic suspension of road-making machines have been studied and analyzed. Evaluation of the strength characteristics of the nonmetallic elements of the pneumatic suspension under the influence of negative temperatures was carried out. It was found out by experiments that the influence of negative temperatures resulted in an increase in stiffness of a rubber part of an air cell. It was determined that for increasing resistance of the nonmetallic elements of the pneumatic suspension to the influence of negative temperatures it was necessary to use anaerobic impregnating compounds.

Evaluation of the strength characteristics of non-metallic elements of the air suspension of machines under the influence of negative temperatures and aggressive environments

2021 ◽  
pp. 3-6
Author(s):  
Keyword(s):  
Operating Conditions ◽  
Strength Characteristics ◽  
Pneumatic Cylinder ◽  
Metallic Elements ◽  
Road Vehicles ◽  
Air Suspension ◽  
Negative Temperatures ◽  
Rubber Part ◽  
Metallic Rubber ◽  
Deicing Agents

The operating conditions of non-metallic elements of the air suspension of road vehicles are analyzed. The influence of deicing agents and negative temperatures on non-metallic (rubber) elements of the pneumatic spring is studied. The methods of conducting tests to assess the effect of negative temperatures and aggressive environments on non-metallic elements of the air suspension are described. It is shown that the destruction of the microstructure is caused by the action of reagents on the rubber part of the pneumatic cylinder. Keywords: road vehicles, air suspension, rubber elements, negative temperatures, deicing agent

Resistance determination of joints of plastic components, made by additive technologies, to effect of negative temperatures

2021 ◽  
Vol 0 (1) ◽  
pp. 23-27
Author(s):  
I. S. Nefyolov ◽  
◽  
N. I. Baurova ◽  
Keyword(s):  
Low Temperature ◽  
Room Temperature ◽  
Negative Influence ◽  
Strength Properties ◽  
Additive Technologies ◽  
Strength Characteristics ◽  
Hot Gas ◽  
Negative Temperatures ◽  
Plastic Components

The effect of negative temperatures on strength characteristics of plastic component joints (hot gas welding, gluing, 3D-welding) made with the use of additive technologies has been examined. It has been found out that 3D-wlding allows one to produce joints with the highest strength properties. It was shown that low temperature values (–30 °С) did not have the negative influence on strength properties of ABS-plastic joints but even increased them as compared with analogues samples tested at the room temperature.

Application prospect of impregnating compounds for maintenance of suspension components of road machines under different temperature conditions

2021 ◽  
Vol 0 (6) ◽  
pp. 40-44
Author(s):  
I. G. Marenkov ◽  
◽  
N. I. Baurova ◽  
Keyword(s):  
Service Life ◽  
General Purpose ◽  
Temperature Conditions ◽  
Impregnating Compound ◽  
Negative Temperatures ◽  
Pneumatic Suspension ◽  
Increase Service Life ◽  
Plastic Grease

The application possibility of impregnating compounds for maintenance of rubber components of a pneumatic suspension of road machines under different temperature conditions has been assessed. Solid oil (the cheapest general-purpose plastic grease) and anaerobic material of AN-1U grade (richer impregnating compound) were used as impregnating compounds. It was found out that the use of impregnating compounds for maintenance of rubber components of a pneumatic suspension of road machines made possible to increase their resistance to the effect of negative temperatures, to minimize material cracking and as a result to increase service life of the suspension.

Change in strength characteristics of non-metallic components of air machine suspension under influence of negative temperatures

2020 ◽  
Vol 0 (10) ◽  
pp. 27-31
Author(s):  
I.G. Marenkov ◽  
◽  
N. I. Baurova ◽  
Keyword(s):  
Elastic Properties ◽  
Cold Season ◽  
Strength Characteristics ◽  
Air Spring ◽  
Term Operation ◽  
Air Suspension ◽  
Negative Temperatures

Operation features of non-metallic components of an air suspension of road-making machines have been examined. The main reasons of occurrence of the most widespread defects were analyzed. The strength characteristics of non-metallic components of the air machine suspension under the influence of negative temperatures were determined. It was found out that the rigid characteristics of nonmetallic components of an air spring bellow considerably increased under the influence of negative temperatures, and it resulted in degradation of the elastic properties and increasing the crack occurrence risk during the long-term operation of equipment in a cold season.

Study of operating properties of aanticorrosion packing papers

2020 ◽  
Vol 76 (10) ◽  
pp. 1021-1027
Author(s):  
A. P. Ponomarev ◽  
L. G. Kolyada ◽  
E. V. Tarasyuk
Keyword(s):  
Steel Strip ◽  
Low Carbon Steel ◽  
Strength Characteristics ◽  
Low Carbon ◽  
Operating Characteristics ◽  
Packing Materials ◽  
Accelerated Corrosion ◽  
Operating Properties ◽  
Deformation And Strength Characteristics ◽  
Anticorrosion Properties

Metal products are subjected to atmospheric corrosion during transportation and storing. An important way to prevent this negative phenomenon is application of special packing materials, in particular materials, containing volatile inhibitors of corrosion, which protect metal against various corrosion agents. To protect metal effectively it is necessary to provide a definite level of operating characteristics of packing materials. The purpose of the work was the study of operating properties of inhibited crepe, inhibited and laminated polyethylene film, inhibited crepe and reinforced by polypropylene web papers, manufactured by OJSC “PP TechnoKhim”, Magnitogorsk, used for packing of metals. Structural and dimensional, sorption, deformation and strength characteristics, of the studied anticorrosion papers are presented, the characteristics being calculated based on the results of measurements. To determine their physical-mechanical and anticorrosion properties, standard methods and methodologies were used. To evaluate impact of moisture and transportation conditions, indices of water adsorption and wear of the studied papers were determined. Inhibitor content in these materials was determined by thermogravimetric analysis method. Their protective ability was studied on samples of low carbon steel strip. For accelerated corrosion tests the strip samples were degreased by alcohol, dried in air and packed in the studied anticorrosion papers, after that they were exposed under increased temperatures and moisture conditions. It was determined, that among the materials under the study, the inhibited crepe paper, reinforced by polypropylene web, hhas the best complex of physical-mechanical and anticorrosion properties. It provides a higher level of prevention corrosion of metal l and surpasses other materials in a number of deformation and strength characteristics. Recommendations were proposed to improve qquality of produced anticorrosion papers.

On the dynamics of distribution of the American White Butterfly, Hyphantria cunea Drury, 1973 (Lepidoptera, Arctiidae), in Ukraine regarding the annual minimal air temperatures

2018 ◽  
Vol 14 (1) ◽  
pp. 44-57
Author(s):  
S. N. Shumov
Keyword(s):  
Air Temperature ◽  
Annual Reports ◽  
Complete Elimination ◽  
Hyphantria Cunea ◽  
White American ◽  
Gis Technologies ◽  
Data Analyses ◽  
Air Temperatures ◽  
Negative Temperatures

The spatial analysis of distribution and quantity of Hyphantria cunea Drury, 1973 across Ukraine since 1952 till 2016 regarding the values of annual absolute temperatures of ground air is performed using the Gis-technologies. The long-term pest dissemination data (Annual reports…, 1951–1985; Surveys of the distribution of quarantine pests ..., 1986–2017) and meteorological information (Meteorological Yearbooks of air temperature the surface layer of the atmosphere in Ukraine for the period 1951-2016; Branch State of the Hydrometeorological Service at the Central Geophysical Observatory of the Ministry for Emergencies) were used in the present research. The values of boundary negative temperatures of winter diapause of Hyphantria cunea, that unable the development of species’ subsequent generation, are received. Data analyses suggests almost complete elimination of winter diapausing individuals of White American Butterfly (especially pupae) under the air temperature of −32°С. Because of arising questions on the time of action of absolute minimal air temperatures, it is necessary to ascertain the boundary negative temperatures of winter diapause for White American Butterfly. It is also necessary to perform the more detailed research of a corresponding biological material with application to the freezing technics, giving temperature up to −50°С, with the subsequent analysis of the received results by the punched-analysis.

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