مهندسی ساخت و تولید ایران

مهندسی ساخت و تولید ایران

بررسی اثر هندسه بافت بر روی رفتار اصطکاکی آب‌بندهای مکانیکی گرافیتی

نوع مقاله : مقاله پژوهشی

نویسندگان
ادیب ریاحی
مسعود فرحناکیان
حمزه شاهرجبیان
گروه مهندسی مکانیک، واحد نجف آباد، دانشگاه آزاد اسلامی، نجف آباد، ایران
10.22034/ijme.2025.519612.2073
چکیده
مکانیزم آب‌بندهای مکانیکی به عنوان یکی از اجزای حیاتی در سیستم‌های دوار صنعتی، نقش تعیین‌کننده‌ای در جلوگیری از نشت سیالات تحت فشار و کاهش تلفات انرژی ایفا می‌کنند. عملکرد بهینه این آب‌بندها تا حد زیادی به رفتار اصطکاکی بین سطوح تماس آن‌ها وابسته است که خود متأثر از مشخصات هندسی و توپوگرافی سطح می‌باشد. در این تحقیق، بافت‌هایی با هندسه مختلف و چگالی سطحی یکسان توسط لیزر فایبر با توان 30 وات بر روی آب‌بندهای مکانیکی دوار ایجاد شده است. بافت نمونه‌ها به صورت اشکال هندسی لوزی، دایره و مربع درنظر گرفته شد، و تست اندازه‌گیری اصطکاک توسط دستگاه ویژه‌ای که به این منظور ساخته شده است در فشارها و سرعت‌های مختلف انجام شد. نتایج آزمایش‌ها نشان داد سطوح دارای بافت هندسی نسبت به سطح بدون بافت هندسی در همه شرایط باعث افزایش بازده آب‌بندی شد. در محدوده فشار 5 تا 15 بار (فشار پمپ‌های صنعتی گریز از مرکز دبی بالا) سطح با بافت لوزی شکل بهترین عملکرد را نسبت به بقیه سطوح با بافت‌های دیگر نشان داد، بطوریکه در فشار 5 بار نسبت به سطح بدون بافت حدود 50% گشتاور و اصطکاک را کاهش داد.
کلیدواژه‌ها
آب‌بند مکانیکی؛ هندسه بافت؛ چگالی سطحی بافت؛ تست اصطکاک

عنوان مقاله English

The effect of surface texture geometry on the frictional behavior of graphite mechanical seals

نویسندگان English

Adib Riahi
Masoud Farahnakian
Hamzeh Shahrajabian
Department of Mechanical Engineering, Na. C, Islamic Azad University, Najafabad, Iran
چکیده English

Mechanical seals serve as critical components in industrial rotary systems, playing a decisive role in preventing pressurized fluid leakage and reducing energy losses. The optimal performance of these seals largely depends on the frictional behavior between their contact surfaces, which is itself influenced by surface geometric characteristics and topography. In this study, various geometric textures with identical surface densities were created on rotary mechanical seals using a 30W fiber laser. The sample textures were designed as diamond (rhombic), circular, and square patterns. Friction measurements were conducted using a custom-built test rig under varying pressures and rotational speeds. Experimental results demonstrated that textured surfaces consistently outperformed non-textured surfaces in sealing behavior across all test conditions. Within the pressure range of 5-15 bar (typical for high-flow industrial centrifugal pumps), the diamond-patterned surface exhibited superior performance compared to other textures, reducing torque and friction by approximately 50% relative to the non-textured surface.

کلیدواژه‌ها English

Mechanical Seal
Texture Geometry
Textured Surface Density
Friction Test
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