scholarly journals Improving the Efficiency of Grinding Sugar Beet in Centrifugal Beet Cutters

2021 ◽  
Vol 31 (1) ◽  
pp. 37-55
Author(s):  
Feliks Ya. Rudik ◽  
Sergey А. Bogatyrev ◽  
Anatoliy P. Kovylin ◽  
Madina S. Tulieva
Keyword(s):  
Wear Resistance ◽  
Sugar Beet ◽  
Experimental Studies ◽  
The State ◽  
Design Parameters ◽  
Grinding Process ◽  
Theoretical Studies ◽  
Factors Affecting ◽  
Relative Wear ◽  
Relative Wear Resistance

Introduction. Grinding sugar beet should be carried out with minimal losses in centrifugal beet cutters with specially designed knives that provide frequent and constant chaotic longitudinal-lateral cutting of circular conductive beet knots. The objective of the work is to increase the reliability of the knives of centrifugal beet cutters by structural and technological strengthening in the process of their production and restoration. Materials and Methods. The state of the cutting edges of the knives was determined by using the micrometric measurement of the wear and deformation of the edges. Physical and mechanical indicators were analyzed based on the values of wear resistance, microhardness, and bending endurance. Results. The analyzes of the defective state of the knives of centrifugal beet cutters and theoretical studies of the grinding process have allowed formulating the factors affecting the permeability of the beet chips and the efficiency of their grinding with knives of a special diamond-shaped design. Experimental studies have made it possible to establish dynamically substantiated design parameters of an improved knurled knife. Discussion and Conclusion. The proposed measures ensured an increase in the durability of knives by 27–30%, the relative wear resistance of cutting edges by 20%, the limit of endurance of cutting edges for bending by 25% and a shift increase in the length of chips by 18–20% with an increase in its permeability by 16–18%.

Relative wear resistance of borided steels

1976 ◽  
Vol 18 (9) ◽  
pp. 826-827
Author(s):  
V. P. Bezruchko ◽  
A. S. Korotya
Keyword(s):  
Wear Resistance ◽  
Relative Wear ◽  
Relative Wear Resistance

Microstructure and Corrosive Wear Property of Super High Chromium Cast Iron (SHCCI)

2011 ◽  
Vol 228-229 ◽  
pp. 905-908
Author(s):  
Liu Jie Xu ◽  
Shi Zhong Wei ◽  
Ji Wen Li ◽  
Guo Shang Zhang ◽  
Xiang Dong Ma
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Carbon Content ◽  
Corrosive Wear ◽  
Wear Property ◽  
High Chromium ◽  
High Chromium Cast Iron ◽  
Relative Wear ◽  
Relative Wear Resistance ◽  
Chromium Cast Iron

To increase the wear resistance of components in slurry pump suffering from serious corrosive abrasion, new super high chromium cast iron (SHCCI) which contains 37wt.% chromium approximately and different carbon content were developed based on the high chromium cast iron with 26wt.% Cr (Cr26). The microstructure of SHCCI was investigated by SEM and XRD. The hardness and impact toughness of SHCCI was tested, and the corrosive wear property of SHCCI was also researched using MCF-30 type erosion abrasion tester under H3PO4 medium condition. The results show that the microstructure of SHCCI is composed of carbide of M7C3+M23C6, martensite and retained austenite. With the increase of carbon content, the hardness of SHCCI first increases and then decreases, the toughness increases, and the corrosive wear property decreases. The relative wear resistance of SHCCI is obviously superior to that of Cr26 cast iron, and the maximal relative wear resistance of SHCCI is three times higher than that of Cr26 cast iron.

scholarly journals RESULTS OF MECHANICAL RESISTANCE TEST OF LABORATORY SAMPLES COATING APPLIED BY LASER DEPOSITION

2016 ◽  
pp. 77-83
Author(s):  
S. A. Frolov ◽  
V. N. Svetashov ◽  
D. D. Vodorezov ◽  
D. S. Leontiev ◽  
O. M. Stolbova
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Protective Coatings ◽  
Laser Deposition ◽  
Resistance Test ◽  
Mechanical Resistance ◽  
Relative Wear ◽  
Relative Wear Resistance ◽  
Application Methods ◽  
Laboratory Specimen

The article analyzes the results of tests of mechanical resistance of laboratory specimen coating applied by laser deposition. Based on the analysis a conclusion is drawn about the effect of protective coatings and their application methods on the friction coefficient and relative wear resistance.

Approach to better beet washing. Part 2

2018 ◽  
pp. 345-350 ◽  
Author(s):  
Daniel Nouws ◽  
Jan L.M. Struijs
Keyword(s):  
Sugar Beet ◽  
Contact Time ◽  
Clay Soil ◽  
Pilot Scale ◽  
Additional Benefit ◽  
Wash Water ◽  
Clay Soils ◽  
Design Parameters ◽  
Theoretical Studies ◽  
Short Contact Time

In 2014 the first part of the “Approach to better beet washing” was published by Spapens-Oerlemans et al. [1]. The enlargement of capacities and the increase of the relative amount of clay-soil received by the Dutch Suiker Unie factories, requires a more effective beet washing. The experiments done since 2009 gave new insights in ‘mechanical’ washing of sugar beet originating from clay-soils. To reach the desired washing result a sufficient ‘mechanical’ washing is required with an additional spray washing step. Since 2013 new understandings about the relevant design parameters and the optimal configuration for spray washing of clay-soil-beet were derived from theoretical studies as well as pilot and factory scale experiments. An additional benefit of spray washing instead of extended mechanical washing is the more gentle treatment and short contact time with wash water, which results in less sugar elution. By implementing the pilot scale based washing curve and analyzing the sugar elution to wash water a technical design of two new beet washing facilities in the Netherlands could be made.

STUDY OF THE RESISTANCE OF TAPERS WHEN APPLYING METAL-CLADDING LUBRICANT-COOLING FLUIDS

2021 ◽  
pp. 57-61
Author(s):  
IVAN Yu. IGNATKIN ◽  
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Cutting Speed ◽  
Calculated Data ◽  
High Speed Steel ◽  
Additive Concentration ◽  
Relative Wear ◽  
Relative Wear Resistance ◽  
Industrial Oil ◽  
Rotary Speed

The paper discusses the results of comparative tests of the period of tap resistance in various technological environments. The workpieces were processed in the medium of industrial oil I-30 with using a 10 and 20 percent solution of the metal-coating additive “Valena SV” in the same oil. The tests were performed on M10×1 taps made of high-speed steel of the R6M5 brand during the production of through threaded holes in samples made of steel of the Steel 40X brand. The cutting speed varied from 5.7 to 11.1 m/min at the rotary speed of the tool ranging between 180 and 355 rpm. Based on the experimental material, a regression model of the relationship between the relative wear resistance and the additive concentration, and cutting speed has been determined. The author has evaluated the model adequacy and the convergence of the experimental and calculated data. It has been found that at a cutting speed of 11.1 m/min and an additive concentration of 20%, the relative wear resistance of the taps increased by 3.1 times. The results obtained testify to the eff ectiveness of the composition and confi rm the hypothesis of an increase in the wear resistance of the taps in the medium of metal-plating lubricating-and-cooling liquids.

scholarly journals Influence of vibration impacts from vehicles on the state of the foundation structure of a residential building

2019 ◽  
Vol 135 ◽  
pp. 03053
Author(s):  
Tatiana Zolina ◽  
Natalya Kupchikova
Keyword(s):  
Seismic Waves ◽  
Soil Layer ◽  
Experimental Studies ◽  
Residential Building ◽  
Structural Type ◽  
The State ◽  
Building Structures ◽  
Factors Affecting ◽  
Building Foundation ◽  
Foundation Structure

In this work, experimental studies were conducted on the effect of vibrational influences from highways on the state of the foundation structures of a five-story residential building in Astrakhan. The studies were combined with an examination of the geo-base, foundations, and foundation of a multi-story brick residential building. Studies have shown that over four years, damaged building structures underwent significant changes due to increased vibration from the highway, and the rate of deformation in the supporting structures prove their emergency state. It is confirmed that the main factors affecting the magnitude of vibration acceleration of the building foundation structure are: structural type of the building; distance from the building to the source of seismic waves; longitudinal wave propagation velocity in the soil layer.

Experimental Study on Wear Resistance of Engine Cylinder Based on Surface Hardening Technology

2011 ◽  
Vol 189-193 ◽  
pp. 599-602
Author(s):  
Jian Min Sun ◽  
Yi Zhang
Keyword(s):  
Wear Resistance ◽  
Surface Hardening ◽  
High Load ◽  
Cylinder Wall ◽  
Hardening Material ◽  
Assessment Index ◽  
Relative Wear ◽  
Relative Wear Resistance ◽  
Engine Cylinder ◽  
Iron Plating

In order to improve wear resistance of engine cylinder, the surface hardening technology is analyzed. The hardening methods which iron plating and composite iron plating have application in engine cylinder repair are put forward. The relative speed and pressure between piston ring and cylinder wall are determined as main wear factors of engine cylinder. And wear resistance of hardening material is chosen as assessment index. At the high load, the relative wear resistance of engine cylinder hardened by composite iron plating is twice as high as high phosphors cast iron. By comprehensive contrast of the wear resistance of hardening materials, relative wear resistance of composite iron plating is better than common engine cylinder material, and can fit for the cylinder hardening of high load engine.

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