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Journals / Isı Bilimi ve Tekniği Dergisi / 2016 / Cilt: 36 - Sayı: 2

DEĞİŞKEN DEVİRLİ HERMETİK KOMPRESÖR YAĞLAMA SİSTEMİ İÇİN AKIŞ MODELİNİN ANALİTİK VE SAYISAL OLARAK KARŞILAŞTIRILMAS

A COMPARISON OF AN ANALYTICAL AND NUMERICAL FLOW MODEL FOR THE LUBRICATION SYSTEM OF A VARIABLE SPEED HERMETIC COMPRESSOR

Sertac CADIRCI
Mustafa OZSIPAHI
Hasan GUNES
Kemal SARIOGLU
Pages
41–49
Publication Date
2022-10-18
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Specifically, the effects of the rotational speed, the oil viscosity, the submersion depth of the crankshaft in the oil sump and screw aspect ratio are investigated in this paper.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This study presents an analytical flow model for the screw pump and compares it with the numerical simulations for the lubrication system of a variable speed hermetic reciprocating compressor used mainly in household refrigerators.
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Key Findings & Data:Since variable capacity compressors (VCC) can be operated at different rotational speeds, a sufficient lubrication is required even at low rotational speeds where centrifugal effects are at a minimum.
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Conclusion & Impact:Specifically, the effects of the rotational speed, the oil viscosity, the submersion depth of the crankshaft in the oil sump and screw aspect ratio are investigated in this paper.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

This study presents an analytical flow model for the screw pump and compares it with the numerical simulations for the lubrication system of a variable speed hermetic reciprocating compressor used mainly in household refrigerators. Since variable capacity compressors (VCC) can be operated at different rotational speeds, a sufficient lubrication is required even at low rotational speeds where centrifugal effects are at a minimum. The lubrication system of such compressors includes a screw pump inside their crankshaft for this purpose. Using the analytical flow model, effects of the main design parameters for the screw pump to maximize the mass flow rate of the lubricant released from the upper part of the crankshaft are predicted and compared with numerical results. Specifically, the effects of the rotational speed, the oil viscosity, the submersion depth of the crankshaft in the oil sump and screw aspect ratio are investigated in this paper.

Özet

Bu çalışmada ev tipi buzdolaplarında kullanılan değişken devirli hermetik pistonlu kompresörlerin yağlama sisteminde bulunan vidalı pompa etrafındaki akış analitik olarak modellenmiş olup, sayısal modellemeler ile karşılaştırılmıştır. Değişken kapasiteli kompresörler (VCC) farklı devir sayılarında çalıştırılabildikleri için, merkezkaç etkilerin en az seviyede olduğu düşük devir sayılarında dahi yeterli bir yağlamaya ihtiyaç duyulmaktadır. Bu amaç için, krank mili içerisinde yer alan vidalı pompa bu tip kompresörlerin yağlama sisteminin bir parçasıdır. Analitik akış modeli kullanılarak, krank mili ucundan çıkan kütlesel yağ debisini arttıracak ana tasarım parametrelerinin etkileri tahmin edilmiş ve sayısal sonuçlar ile karşılaştırılmıştır. Bu çalışmada özellikle devir sayısının, yağ viskozitesinin, krank milinin yağ haznesi içerindeki daldırma derinliğinin ve vida diş oranının etkileri incelenmiştir.

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Cite This Article

CADIRCI, S., OZSIPAHI, M., GUNES, H., SARIOGLU, K. (2022). DEĞİŞKEN DEVİRLİ HERMETİK KOMPRESÖR YAĞLAMA SİSTEMİ İÇİN AKIŞ MODELİNİN ANALİTİK VE SAYISAL OLARAK KARŞILAŞTIRILMAS. Isı Bilimi ve Tekniği Dergisi, Cilt: 36 - Sayı: 2, 41–49. https://ajindex.com/articles/542517

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References (7)

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