Investigation of Energy Saving Rotary Shaft Seals by Finite Element Analysis

Abstract

In this study, radial force, number of contacting caterpillars, and contact surfaces of rubber material-based energy-saving rotary shaft seals (ERS), which are prototyped to be used in powertrains of new generation electric vehicles that can operate at high speeds and temperatures, were analyzed by experimental and finite element analysis (FEA) was studied. A 9% difference was found between the experimental test results for the radial force, which affects the endurance life of ESSs, and the FEA results. The data obtained from the rubber material tests were matched with the Abaqus system, and the Mooey-Rivlin material coefficient values were calculated. Thanks to the prepared FEA procedure, the movement of the sealing element during the assembly, reaction force, and other changes in the lip were easily observed. The number of lips in contact was the same in both studies, and a deviation of 2% was obtained between the contact surfaces. In this way, it has been seen that the design of sealing elements can be used as an alternative development method that saves time with finite element analysis without the need for prototypes, depending on the correct material definition.

Keywords

• Rotary shaft seals
• Finite element analysis
• Hyperelastic material models
• Rubber
• Energy saving seal

Enerji Tasaruflu Döner Mil Keçelerinin Sonlu Elemanlar Analizi ile İncelenmesi

Öz

Bu çalışmada yüksek devir ve sıcaklıklarda çalışabilen yeni nesil elektrikli araçların güç aktarma organlarında kullanılmak üzere prototipi üretilen, kauçuk malzeme esaslı enerji tasarruflu döner mil keçelerinin(ESS) statik yükleme durumundaki radyal kuvvet, temas eden tırtıl sayısı ve temas yüzeylerinin durumu deneysel ve sonlu elemanlar analiziyle (FEA) incelenmiştir. ESS’lerin dayanım ömrünü etkileyen radyal kuvvet için yapılan deneysel ölçümler ile FEA sonuçları arasında %9’a kadar bir fark görülmüştür. Kauçuk malzeme testlerinden elde edilen veriler, Abaqus sistemi ile eşleştirilerek Mooey-Rivlin malzeme katsayı değerleri hesaplanmıştır. Hazırlanan FEA prosedürü sayesinde de sızdırmazlık elemanının montajı sırasındaki hareketi, reaksiyon kuvveti, dudakta meydana gelen diğer değişimler rahatlıkla gözlenmiştir. Temas eden tırtıl sayıları her iki çalışma içinde aynı olup, temas yüzeyleri arasında %2’lik bir sapma değeri elde edilmiştir. Bu şekilde, sızdırmazlık elemanlarının tasarlanması doğru malzeme tanımlamasına bağlı, prototip ihtiyacı duyulmadan sonlu elemanlar analizi ile zaman kazandıran alternatif bir geliştirme yöntemi olarak kullanılabileceği görülmüştür.

Anahtar Kelimeler

• Döner mil keçeleri
• Sonlu elemanlar analizi
• Hiperelastik malzeme modelleri
• Kauçuk
• Enerji tasarruflu keçe
• Döner mil keçeleri, Sonlu elemanlar analizi, Hiperelastik malzeme modelleri, Kauçuk, Enerji tasarruflu keçe

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