کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5490407 1524790 2017 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Miniature magnetic fluid seal working in liquid environments
ترجمه فارسی عنوان
مایع مغناطیسی مایع در محیط های مایع کار می کند
کلمات کلیدی
مهر و موم مایع مغناطیسی، مهر و موم تنگ مایع پمپ کاتد، عقیم سازی گاز اتیلن اکسید،
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی


- A miniature magnetic fluid seal working in a liquid environment was developed.
- The seal can be installed on Ø1 mm shaft and can seal against 370 mmHg at 40000 rpm.
- The magnetic fluid seal will be useful for a catheter blood pump.

This study was carried out to develop a miniature magnetic fluid (MF) seal working in a liquid environment. The miniature MF seal is intended for use in a catheter blood pump. The requirements for the MF seal included a size of less than Ø4×4.5 mm, shaft diameter of 1 mm, sealing pressure of 200 mmHg, shaft speed of up to 40000 rpm, and life of one month.The miniature MF seal was composed of an NdFeB magnet (Ø4×Ø2×1) sandwiched between two pole pieces (Ø4×Ø1.1×0.5). A shield (Ø4×Ø1.2×1.5) was placed on the pole piece facing the liquid to minimize the influence of pump flow on the MF. The seal was installed on a Ø1 shaft. A seal was formed by injecting MF (Ms: 47.8 kA/m and η: 0.5 Pa·sec) into the gap between the pole pieces and the shaft. Total volume of the MF seal was 44 μL. A sealing pressure of 370 mmHg was obtained at motor speeds of 0-40,000 rpm. The seal remained perfect for 10 days in saline under the condition of a pump flow of 1.5 L/min (The test was terminated in accordance with plans). The seal remained intact after ethylene oxide sterilization during which the seal was exposed to high pressures. In conclusion, the newly developed MF seal will be useful for a catheter pump.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 431, 1 June 2017, Pages 285-288
نویسندگان
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