بلبرینگ تماس زاویه ای یا Angular Contact Ball Bearings از حلقه هایی داخلی و بیرونی تشکیل شده اند که این حلقه ها در بلبرینگ دارای زاویه ای نسبت به یکدیگر می باشند، طراحی حلقه های زاویه دار به دلیل بالا بردن قدرت تحمل بارهای شعاعی و محوری به صورت همزمان می باشد. میزان درجه زاویه بین حلقه های بلبرینگتماس زاویه ای با میزان تحمل بار محوری در این نوع از بلبرینگ ها دارای نسبت متقابل می باشد به این صورت که هر چه زاویه بزرگتر باشد تحمل بار محوری نیز توسطبلبرینگ تماس زاویه ای افزایش خواهد یافت.
انواع بلبرینگ تماس زاویه ای
بلبرینگ های تماس زاویه ای شامل موارد زیر می باشند
- بلبرینگ تماس زاویه ای یک ردیفه
- بلبرینگ تماس زاویه ای دو ردیفه
- بلبرینگ با چهار نقطه تماس
بررسی بلبرینگ تماس زاویه یک ردیفه
بلبرینگ های تماس زاویه یک ردیفه یاSingle Row Angular Contact Ball Bearings علاوره بر تحمل فشار بارهای شعناعی امکان تحمل بارهای محوری را دارا می باشند اما بارهای محوری باید رد یک جهت بر بلبرینگ تماس زاویه تک ردیفه وارد شود.
اما این نکته قابل ذکر می باشد که بارهای شعاعی بر بلبرینگ تماس زاویه تک ردیفه یک نیروی محوری ایجاد می کند که این نیرو باید مهار شود به همین علت در هنگام استفاده از بلبرینگ های تماس زاویه یک ردیفه معمولا یک بلبرینگ دیگر نیز به کار بده می شود در واقع از دو بلبرینگ تماس زاویه یک ردیفه استفاده می کنند.
استانداردهای تولیدی دربلبرینگ های تک ردیفه تماس زاویه ای به دو دسته کلی تقسیم می شود که شامل:
- در صورتی که نیاز نصب یک بلبرینگ در موقعیت باشد از بلبرینگ های دسته اول که در جلوی شماره اصلی پسوندی ندارند استفاده می شود.
- گروه دوم با پسوند CB در مواردیست که بلبرینگ به صورت دو تایی نصب می شود. این گروه که عموما اندازه های بزرگ بلبرینگ ها را شامل میشود به گونه ای جهت مصارف عمومی با یکدیگر مطابقت داده شده اند که بعد از نصب به لقی دلخواه از پیش تعیین شده رسیده و توزیع بار بر روی آنها به طور یکنواخت صورت گیرد.
بلبرینگ تماس زاویه ای دو ردیفه
بلبرینگ های تماس زاویه ای دو ردیفه یا Double Row Angular Contact Ball Bearings این نوع ازبلبرینگ ها مانند دو بلبرینگ تماس زاویه ای تک ردیفه طراحی شده که از پشت به هم جفت شده و تنها تفاوت این نوع از بلبرینگ ها تفاوت در پهنا می باشد که از در این نوع از بلبرینگ ها کمتر می باشد.
بلبرینگ های تماس زاویه ای دو ردیفه دارای قدرت تحمل بارهای سنگین شعاعی را دارا می باشند و در صورتی که فشار بارهای محوری از دو جهت باشد می توانند این نوع از بارها را متحمل شوند و همچنین قابل ذکر می باشد که زاویه تماس در اکثر بلبرینگ های تماس زاویه دو ردیفه 320می باشد.
دسته ای ازبلبرینگ های تماس زاویه ای که با پسوند A مشخص می شوند هیچ شیار ساچمه ای ندارند و به همین دلیل می توانند بارهای محوری که از دو طرف وارد می شود را متحمل شود و جنس پنجره ساچمه های این نوع از بلبرینگ ها فیبری یا همان پلی امید می باشد.
بلبرینگ هایی که بدون پسوند هستند دارای شیار هایی می باشند که ساچمه خور هستند و جنس پنجره های ساچمه آنها از فولاد و یا برنج می باشد.
و همچنین بلبرینگ هایی که دارای پسوند E می باشند دارای ساچمه بیشتری می باشند و همچنین به دلیل داشتن شیار هایی که ساچمه خور هستند دارای قدرت بالایی در تحمل بار می باشند. این نوع ازبلبرینگ ها دارای دو نوع کاسه نمد پلاستیکی و فلزی می باشند و لقی داخلی این نوع از بلبرینگ ها محوری می باشد.
همانطور که قبلا ذکر شد پنجره ساچمه ای در سه جنس پلی آمید یا فیبری که قابلیت کارکرد تا دمای 1200 درجه سانتی گراد را دارامی باشند و همچنین فولادی و برنجی تولید می شود. حتما دقت کنید که در زمان نصب بلبرینگ هایی که دارای شیار ساچمه خور هستند باید دقت کامل در نصب داشته باشید تا بار سنگین و محوری بر روی سمتی که شیار ندارد اعمال شود.
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