Probability of the Critical Length of a Fatigue Crack Occurring at the Tooth Foot of Cylindrical Geared Wheels of the Drive System of a Fiomax 2000 Ring Spinner
Journal Title: Fibres and Textiles in Eastern Europe - Year 2017, Vol 25, Issue 1
Abstract
In the present paper, we describe a method of determination of the probability of reaching the critical crack length at the tooth root of the cylindrical geared wheels of the drive system of the Fiomax 2000 ring spinner. The Paris-Erdogan formula was utilised for calculations of the fatigue crack length depending on the number of load cycles. Experimental investigations were performed on cylindrical geared wheels. The wheel specimens were manufactured from 1.6523 steel (UE) according to a technical specification relevant to the drive system of the ring spinner. The experiments were performed using a professional pulsator (pulsating test machine). Based upon the experiments (series of 12 tests), material constants and were calculated. These parameters were utilised in the Paris law of crack propagation for further calculations. Moreover it was also ascertained that these unknowns are related via the deterministic relationship. Therefore a function allowing for approximation of constant in dependence on exponent m was derived. In the next step, for the values of parameter chosen – belonging to the variability interval, established from experimental data – we determined the times of reaching the critical length of the fatigue crack. It was stated that the best approximation distribution describing the simulated random values of times of reaching the critical length of the tooth crack for the drive system of the ring spinner is the asymptotic Gumbel’s distribution. Knowing the distribution and number of cycles until reaching the critical crack length at the tooth root, one can evaluate the fatigue life of the damaged wheel in the ring spinner (Fiomax) drive system for the assumed probability. The goal of the present paper is evaluation of the working time of the elements of the drive system of a ring spinner until the occurrence of damage. The highest fatigue life of geared wheels was achieved within the interval (4.3 – 4.5)x 105 cycles. However, it is recommended to change of the geared wheel in case of the spotting of early symptoms of defect. For the stretching apparatus, the authors of the present paper suggest the exchange of the idler geared wheels at least once per year.
Authors and Affiliations
Jacek Rysiński, Robert Drobina, Jerzy Tomaszewski
Keywords
Related Articles
- EP ID EP199568
- DOI 10.5604/12303666.1227895
- Views 80
- Downloads 0
Ocena ekologicznych naturalnych preparacji antymikrobowych tekstyliów uzyskanych z udziałem ekstraktów z aloesu i miodli indyjskiej
Ekstrakty z żelu aloesowego i aktywnych substancji miodli indyjskiej mieszano w zaprawie barwiarskiej dla uzyskania gotowej preparacji. Bielone bawełniane próbki nasycano roztworem o stężeniu 5%, 7% i 10% żelu aloesowego...
Effect of Selected Injection Conditions on the Mechanical Properties and Structure of HDPE
This paper is devoted to research of high-density polyethylene (HDPE), which belongs to one of three main biomaterial groups, i.e. polymeric materials. Hence, due to its unique properties, it still plays an important rol...
Evaluation of Regenerated Bamboo, Polyester and Cotton Knitted Fabrics for Summer Clothing
aaa<br/><br/>
Impact of the Mixture of Hexa(N-hydroxymethyl)amidocyclotriphosphazene and Partially Methylated Melamine Formaldehyde Resin on the Flame Retardancy of Paper
The flame retardancy of the mixture of hexa(N-hydroxymethyl)amidocyclotriphosphazene and partially methylated melamine formaldehyde resin (HHMATP/PMMM) in paper was proposed by limiting oxygen index measurement (LOI), th...
Assemblage of Wool and Silk Textiles from Medieval Waste Layers in Prague, Czech Republic
The article summarises information on a large assemblage of medieval wool and silk textiles found during an archaeological excavation of waste layers from the fourteenth and fifteenth centuries in the centre of Prague. T...