Bir Eliptik Dişli Hidrolik Pompanın Tasarımı, Modal Analizi, Katmanlı Üretimi ve Akış Performansı

Öz

Bu çalışmada, eliptik ve düz dişli profiline sahip hidrolik pompaların tasarımı, üretimi, modal analizi ve akış performansları deneysel olarak karşılaştırılmıştır. Öncelikle, her iki dişli tipi bilgisayar destekli tasarım (CAD) ortamında modellenmiş ve sonlu elemanlar yöntemi (FEM) kullanılarak doğal frekans ve mod şekilleri incelenmiştir. ABS, PC, PETG ve PLA olmak üzere dört farklı termoplastik malzeme üzerinde yapılan modal analizler sonucunda, yüksek frekans dayanımı ve üretim uygunluğu nedeniyle PLA malzemesi tercih edilmiştir. Seçilen geometri ve malzeme doğrultusunda dişli çiftleri, eklemeli imalat (3D yazıcı) yöntemiyle üretilmiş ve prototip pompaların montajı gerçekleştirilmiştir. Her iki pompa sistemi, 1000 ila 3000 rpm arası farklı devirlerde test edilerek hacimsel debi performansları ölçülmüştür. Deneysel sonuçlara göre, eliptik dişli pompa tüm devirlerde düz dişli pompaya kıyasla daha yüksek ve daha kararlı bir debi sağlamıştır. Deneysel çalışmada en yüksek devir olan 3000 rpm'de eliptik dişli pompa 23,6 L/dk ortalama debi ile çalışırken, düz dişli pompa sadece 4.9 L/dk debi sağlamıştır. Benzer şekilde, deneysel çalışmada en düşük devir olan 1500 rpm'de ise eliptik dişli pompa 8.29 L/dk, düz dişli pompa ise 2,05 L/dk debi üretmiştir. Bu bulgular, eliptik dişli geometrisinin pompa performansını artırmada yaklaşık dört kat etkili olduğunu göstermektedir. Eliptik dişli pompanın kompakt ve yüksek verimli hidrolik sistemler için umut vadeden bir alternatif sunduğunu ortaya koymaktadır.

Anahtar Kelimeler

• Eliptik dişli
• Modal analiz
• Eklemeli imalat
• Akış performansı
• Hidrolik pompa

Design, Modal Analysis, Additive Manufacturing, and Flow Performance of An Elliptical Gear Hydraulic Pump

Öz

In this study, the design, manufacturing, modal analysis and flow performance of hydraulic pumps with elliptical and spur gear profiles are compared experimentally. Firstly, both gear types are modeled in a computer-aided design (CAD) environment and their natural frequencies and mode shapes are analyzed using the finite element method (FEM). As a result of modal analyses performed on four different thermoplastic materials, ABS, PC, PETG and PLA, PLA material is preferred due to its high frequency resistance and production suitability. In line with the selected geometry and material, gear pairs were produced by additive manufacturing (3D printing) method and prototype pumps are assembled. Both pump systems are tested at rotational speeds ranging from 1000 to 3000 rpm to measure volumetric flow performance. Experimental results showed that, at all speeds, the elliptical gear pump delivered a higher and more stable flow rate compared to the spur gear pump. At the highest test speed of 3000 rpm, the elliptical gear pump achieved an average flow rate of 23.6 L/min, whereas the spur gear pump produced only 4.9 L/min. Similarly, at the lowest test speed of 1500 rpm, the elliptical gear pump generated 8.29 L/min, while the spur gear pump delivered 2.05 L/min. These findings indicate that the elliptical gear geometry can improve pump performance by approximately fourfold, offering a compact and highly efficient alternative for hydraulic systems.

Anahtar Kelimeler

• Elliptical Gear
• Modal Analysis
• Additive Manufacturing
• Flow Performance
• Hydraulic Pump

Kaynakça

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