Vidalı hava kompresörlerinde kabin kapaklarının ve PUR esaslı akustik yalıtımın gürültü düzeyine etkisi

Öz

Bu çalışmada, vidalı bir hava kompresöründe kabin kapaklarının ve kapaklara uygulanan poliüretan (PUR) esaslı akustik yalıtımın gürültü yayılımı üzerindeki etkisi deneysel olarak incelenmiştir. Deneyler, 11 kW güce sahip, 10 bar çalışma basıncında ve 2940 dev/dk devir hızında çalışan bir kompresör üzerinde, EN ISO 3744 ve EN ISO 2151 standartları esas alınarak açık test sahasında gerçekleştirilmiştir. Ölçümler, kompresörü çevreleyen yansıtıcı düzlem üzerindeki dokuz mikrofon noktasında, aynı ölçüm geometrisi korunarak her noktada üç tekrarla gerçekleştirilmiştir. Arka plan gürültüsü, kapakların açık, kapalı-yalıtımsız ve kapalı-PUR yalıtımlı olduğu dört farklı çalışma durumu değerlendirilmiştir. Her ölçüm noktası için enerji esaslı ortalama ses basınç düzeyleri (LpA,i) hesaplanmış, dokuz ölçüm noktasının birleştirilmesiyle genel ölçüm yüzeyi ortalama ses basınç düzeyi (LpA,ort) belirlenmiştir. Ayrıca A-ağırlıklı ses güç düzeyleri (LwA) hesaplanmıştır. Sonuçlar, kapakların kapatılmasının gürültü düzeyini azalttığını ve PUR esaslı akustik yalıtımın ilave bir azalma sağladığını göstermiştir. Kapalı-PUR yalıtımlı durumda (LpA,ort), kapalı-yalıtımsız duruma göre 5.24 dB(A), açık duruma göre ise 7.34 dB(A) daha düşük bulunmuştur. Bulgular, PUR esaslı akustik yalıtımın kompresör gürültüsünün azaltılmasında etkili olduğunu göstermektedir.

Anahtar Kelimeler

• Vidalı hava kompresörü
• Akustik yalıtım
• Poliüretan
• Ses basınç düzeyi
• Ses gücü düzeyi

Teşekkür

Bu çalışmanın gerçekleştirilmesi ve sonuçlandırılması sürecinde sağlanan teknik ve kurumsal katkılardan dolayı, başta Üretim ve Teknik Genel Müdür Yardımcısı Sayın Sinan Gülmez olmak üzere Lupamat Makina San. A.Ş. Ar-Ge ekibinin tüm üyelerine teşekkürlerimizi sunarız. Ayrıca, çalışmalarımızın etkin biçimde yürütülmesinde sağladığı kurumsal destek, koordinasyon ve motivasyon desteği için İnsan Kaynakları Müdürü Sayın Özgül Kayalı Çetiner’e teşekkür ederiz.

The effect of compressor cabinet covers and PUR-based acoustic insulation on noise levels in screw air compressors

Öz

This study experimentally investigated the effects of cabinet covers and polyurethane (PUR)-based acoustic insulation on noise propagation in a screw air compressor. Experiments were conducted on an 11-kW compressor operating at 10 bar and 2940 rpm in an open test area based on EN ISO 3744 and EN ISO 2151. Measurements were performed at nine microphone positions on the reflecting plane surrounding the compressor, using the same measurement geometry and three repetitions at each position. Four conditions were evaluated: background noise, covers open, covers closed without insulation, and covers closed with PUR insulation. Energy-averaged sound pressure levels (LpA,i) were calculated for each measurement position, and the overall measurement-surface-averaged sound pressure level (LpA,avg) was determined from the nine measurement positions. A-weighted sound power levels (LwA) were also calculated. The results showed that closing the covers reduced the overall noise level, while PUR-based acoustic insulation provided an additional reduction. The (LpA,avg) value for the closed and PUR-insulated condition was 5.24 dB(A) lower than that for the closed and uninsulated condition and 7.34 dB(A) lower than that for the open condition. These findings demonstrate the effectiveness of PUR-based acoustic insulation in reducing compressor noise.

Anahtar Kelimeler

• Screw air compressor
• Acoustic insulation
• Polyurethane
• Sound pressure level
• Sound power level

Kaynakça

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