2/26/2021 K.N.Toosi University of Technology Machine Element Design II Rolling-Contact Bearings By Soheil Nakhodchi 1 -1اﻫﺪاف آﻣﻮزﺷﻲ : در ﭘﺎﻳﺎن اﻳﻦ ﻓﺼﻞ از ﻛﺘﺎب ﻣﺴﺎﻳﻞ ﻣﺮﺑﻮط ﺑﻪ ﻣﻮارد زﻳﺮ ﻗﺎﺑﻞ ﺣﻞ ﺧﻮاﻫﺪ ﺑﻮد: ﺷﻨﺎﺧﺖ ﻛﺎﻣﻠﻲ از اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎ و ﻛﺎرﺑﺮد آﻧﻬﺎ ﻣﻔﻬﻮم و ﻧﺤﻮه ﻣﺤﺎﺳﺒﻪ و ارﺗﺒﺎط ﺑﻴﻦ ﻗﺎﺑﻠﻴﺖ اﻋﺘﻤﺎد ،ﻃﻮل ﻋﻤﺮ و ﺑﺎرﮔﺬاري ﻳﻚ ﻳﺎﺗﺎﻗﺎن را ﺑﺪاﻧﻴﻢ -روﻳﻪ اﻧﺘﺨﺎب ﻳﻚ ﺑﻠﺒﺮﻳﻨﮓ در ﻳﻚ ﻣﺎﺷﻴﻦ ﺑﻪ ﻛﻤﻚ ﻛﺎﺗﺎﻟﻮﮔﻬﺎي ﺷﺮﻛﺘﻬﺎي ﺳﺎزﻧﺪه ﻣﺎﻧﻨﺪ SKF 2 1 2/26/2021 ﻓﻬﺮﺳﺖ ﻣﻄﺎﻟﺐ -1ﻣﻔﺎﻫﻴﻢ اوﻟﻴﻪ -2ﻣﻘﺪﻣﻪ – ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -3ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﻛﺎرﺑﺮد ,اﺟﺰاء ,ﺗﻌﺎرﻳﻒ -4ﺑﺎرﮔﺬاري در ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -5اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -6ﺳﺎﺧﺖ )ﻣﻮﻧﺘﺎژ( ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -7اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﺟﺰﻳﻴﺎت -8ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ -9ﻋﻤﺮ ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -10اﻧﺘﺨﺎب ﻳﺎﺗﺎﻗﺎن ﻣﻨﺎﺳﺐ ﺑﺮاي ﻃﺮاﺣﻲ 3 -1ﻣﻔﺎﻫﻴﻢ اوﻟﻴﻪ ﻳﺎﺗﺎﻗﺎن ﻗﺴﻤﺘﻲ از ﻳﻚ ﻣﺎﺷﻴﻦ اﺳﺖ ﻛﻪ اﺟﺎزه ﺣﺮﻛﺖ ﺑﺎ ﺣﺪاﻗﻞ ﻧﻴﺮوي اﺻﻄﻜﺎك ﺑﻴﻦ دو ﻋﻀﻮ ﻣﺎﺷﻴﻦ را ﻣﻲ دﻫﺪ .ﻳﺎﺗﺎﻗﺎﻧﻬﺎ ﻣﻲ ﺗﻮاﻧﻨﺪ ﻧﻴﺮو ﺗﺤﻤﻞ ﻛﻨﻨﺪ. در واﻗﻊ ﻫﺮ ﻳﺎﺗﺎﻗﺎن از دو ﻗﺴﻤﺖ رﻳﻨﮓ داﺧﻠﻲ و رﻳﻨﮓ ﺧﺎرﺟﻲ ﺗﺸﻜﻴﻞ ﺷﺪه اﺳﺖ ﻛﻪ ﺑﻴﻦ اﻳﻦ دو رﻳﻨﮓ ﻳﻚ ﻻﻳﻪ ﻧﺎزك ﻓﻴﻠﻢ روﻏﻦ ) (journal bearingو ﻳﺎ ﻳﻚ ﺟﺰ ﻏﻠﺘﺸﻲ )(such as ball bearing Ball bearing 2 Journal bearing 4 2/26/2021 -1ﻣﻔﺎﻫﻴﻢ اوﻟﻴﻪ – اداﻣﻪ 5 -1ﻣﻔﺎﻫﻴﻢ اوﻟﻴﻪ -اداﻣﻪ ﻳﻜﻲ از ﺗﻼش ﻫﺎي ﺑﺸﺮ – ﻏﻠﺒﻪ ﺑﺮ ﻧﻴﺮوي اﺻﻄﻜﺎك ﺑﻮده اﺳﺖ ﺗﺎ ﺑﺘﻮاﻧﺪ ﺑﺎر ﻫﺎ را راﺣﺖ ﺗﺮﺟﺎﺑﺠﺎ ﻧﻤﺎﻳﺪ ﺑﻪ ﻣﺮور زﻣﺎن – ﻫﻢ اﻛﻨﻮن ﺑﻠﺒﺮﻳﻨﮓ ﻫﺎﻳﻲ ﺑﺎ دﻗﺘﻬﺎي ﺑﺴﻴﺎر ﺑﺎﻻ در ﺣﺠﻢ اﻧﺒﻮه ﺗﻮﻟﻴﺪ ﻣﻲﺷﻮد. 6 3 2/26/2021 -2ﻣﻘﺎﻳﺴﻪ و دﺳﺘﻪ ﺑﻨﺪي ﻳﺎﺗﺎﻗﺎﻧﻬﺎ 7 -2ﻣﻘﺎﻳﺴﻪ و دﺳﺘﻪ ﺑﻨﺪي ﻳﺎﺗﺎﻗﺎﻧﻬﺎ – اداﻣﻪ 8 4 2/26/2021 -3ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﻛﺎرﺑﺮد -ﺗﻘﺮﻳﺒﺎ در اﻛﺜﺮ ﻣﺎﺷﻴﻨﻬﺎ ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ اﺳﺘﻔﺎده ﺷﺪه اﺳﺖ. Gearbox 9 -3ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﻛﺎرﺑﺮد -ﺗﻘﺮﻳﺒﺎ در اﻛﺜﺮ ﻣﺎﺷﻴﻨﻬﺎ ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ اﺳﺘﻔﺎده ﺷﺪه اﺳﺖ. 10 5 2/26/2021 -3ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﻛﺎرﺑﺮد ﺗﻮرﺑﻴﻦ ﺑﺎدي 11 -3ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﻛﺎرﺑﺮد Roller skates ﻗﺮﻗﺮه ﻣﺎﻫﻴﮕﻴﺮي 12 6 2/26/2021 -3ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﻛﺎرﺑﺮد -ﺗﻘﺮﻳﺒﺎ در اﻛﺜﺮ ﻣﺎﺷﻴﻨﻬﺎ ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ اﺳﺘﻔﺎده ﺷﺪه اﺳﺖ. 13 -3ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ – اﺟﺰاء -ﻳﻚ ﻳﺎﺗﺎﻗﺎن ﻏﻠﺘﺸﻲ ﺑﻪ ﻃﻮر ﻛﻠﻲ از اﺟﺰا زﻳﺮ ﺗﺸﻜﻴﻞ ﺷﺪه اﺳﺖ. 14 7 2/26/2021 اﺟﺰاء- ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ-3 :• ﻗﻄﻌﺎت اﺻﻠﻲ ﻣﺸﺘﺮك در اﻛﺜﺮ ﺑﻠﺒﺮﻳﻨﮕﻬﺎ رﻳﻨﮓ داﺧﻠﻲ رﻳﻨﮓ ﺧﺎرﺟﻲ ﺳﺎﭼﻤﻪ ﻫﺎ ﺟﺪا ﻛﻨﻨﺪه- 15 اﺟﺰاء- ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ-3 ﺑﻠﺒﺮﻳﻨﮕﻬﺎ در ﻳﻚ اﺳﻤﺒﻠﻲ 1- Cylindrical roller bearing 2- Four-point contact ball bearing 3- Housing 4- Shaft 5- Shaft abutment shoulder 6- Shaft diameter 7- Lock plate 8- Radial shaft seal 9- Distance ring 11- Housing bore diameter 12- Housing bore 13- Housing cover 16 8 2/26/2021 اﺟﺰاء- ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ-3 1- Inner ring 2- Outer ring 3- Rolling element: ball, cylindrical roller, needle roller, tapered roller, spherical roller, toroidal roller 4- Cage 5- Capping device Seal – made of elastomer Shield – made of sheet steel 6- Outer ring outside surface 7- Inner ring bore 8- Inner ring shoulder surface 9- Outer ring shoulder surface 10- Snap ring groove 11- Snap ring 12- Outer ring side face 13- Seal anchorage groove 14- Outer ring raceway 15- Inner ring raceway 16- Recess for capping device 17- Inner ring side face 18-Chamfer 19- Bearing pitch circle diameter 17 اداﻣﻪ- ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ – اﺟﺰاء-3 :• ﻗﻄﻌﺎت اﺻﻠﻲ ﻣﺸﺘﺮك در اﻛﺜﺮ ﺑﻠﺒﺮﻳﻨﮕﻬﺎ رﻳﻨﮓ داﺧﻠﻲ رﻳﻨﮓ ﺧﺎرﺟﻲ ﺳﺎﭼﻤﻪ ﻫﺎ ﺟﺪا ﻛﻨﻨﺪه- 18 9 2/26/2021 اداﻣﻪ- ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ – اﺟﺰاء-3 ﺳﺎﭼﻤﻪ ﻫﺎ Machined metal 19 ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ – اﺟﺰاء – اداﻣﻪ-3 (Cage) ﻗﻔﺲ ﻧﮕﻬﺪارﻧﺪه دﻟﻴﻞ اﺳﺘﻔﺎده از ﻗﻔﺲ ﺟﺪاﻛﻨﻨﺪه 1) Stamped metal cages 2) Machined metal cages 3) Polymer cages 4) Pin-type cages 20 Pin-type cages Polymer cages Machined metal Stamped metal 10 2/26/2021 - 3ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﺗﻌﺎرﻳﻒ • - ﭘﺎراﻣﺘﺮﻫﺎي ﻣﻬﻢ )اﺑﻌﺎدي( ﻃﺮاﺣﻲ : ﻗﻄﺮ داﺧﻠﻲ ﻗﻄﺮ ﺧﺎرﺟﻲ ﺿﺨﺎﻣﺖ )ﺷﻌﺎع ﮔﻮﺷﻪ ﻫﺎ( Bore diameter d Outside diameter D Bearing width B Bearing height H Chamfer dimension r Contact angle α 21 -4ﺑﺎرﮔﺬاري در ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﺑﺮاي ﺗﺤﻤﻞ ﺑﺎرﻫﺎي ﻣﺨﺘﻠﻔﻲ ﻃﺮاﺣﻲ و ﺳﺎﺧﺘﻪ ﻣﻲ ﺷﻮﻧﺪ: 22 11 2/26/2021 -4ﺑﺎرﮔﺬاري در ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -اداﻣﻪ ﺑﺎرﮔﺬاري ﻫﺎي ﻣﺨﺘﻠﻒ در ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ:• ﺑﺎرﮔﺬاري ﺷﻌﺎﻋﻲ • ﺑﺎرﮔﺬاري ﻣﺤﻮري • ﺑﺎرﮔﺬاري ﺗﺮﻛﻴﺒﻲ 23 -5اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ – اداﻣﻪ ﺗﻘﺴﻴﻢ ﺑﻨﺪي ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ: 24 12 2/26/2021 -5اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -اداﻣﻪ ﺗﻘﺴﻴﻢ ﺑﻨﺪي ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ: 25 -5اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -اداﻣﻪ ﻧﻮﻋﻲ دﻳﮕﺮ از ﺗﻘﺴﻴﻢ ﺑﻨﺪي ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ: ﺑﻠﺒﺮﻳﻨﮕﻬﺎ )(ball bearing روﻟﺮ ﺑﺮﻳﻨﮕﻬﺎ )(roller bearing روﻟﺮ ﺑﺮﻳﻨﮕﻬﺎي ﻣﺤﻮري )(Axial roller bearing 13 ﺑﻠﺒﺮﻳﻨﮕﻬﺎي ﻣﺤﻮري )(Axial ball bearing 26 2/26/2021 -6ﺳﺎﺧﺖ )ﻣﻮﻧﺘﺎژ( ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ روش اول : ﻓﻴﻠﻢ ﻛﻮﺗﺎه 27 -6ﺳﺎﺧﺖ )ﻣﻮﻧﺘﺎژ( ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ روش دوم : اﺳﺘﻔﺎده از ﺷﻴﺎر ﭘﺮﻛﻨﻨﺪه 28 14 2/26/2021 K.N.Toosi University of Technology Machine Element Design II )Rolling-Contact Bearings(2nd part By Soheil Nakhodchi 27 ﻓﻬﺮﺳﺖ ﻣﻄﺎﻟﺐ -1ﻣﻔﺎﻫﻴﻢ اوﻟﻴﻪ -2ﻣﻘﺪﻣﻪ – ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -3ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﻛﺎرﺑﺮد ,اﺟﺰاء ,ﺗﻌﺎرﻳﻒ -4ﺑﺎرﮔﺬاري در ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -5اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -6ﺳﺎﺧﺖ )ﻣﻮﻧﺘﺎژ( ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -7اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -ﺟﺰﻳﻴﺎت -8ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ -9ﻋﻤﺮ ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ -10اﻧﺘﺨﺎب ﻳﺎﺗﺎﻗﺎن ﻣﻨﺎﺳﺐ ﺑﺮاي ﻃﺮاﺣﻲ 28 15 2/26/2021 ﺟﺰﻳﻴﺎت- اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ-7 Ball bearings with seal and shield Shields are used to prevent insertion of dirts and foreign objects 29 اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ-7 Ball bearings with seal and shield 1- Open basic design 2-With contact seals 32 16 2/26/2021 اﻧﻮاع ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ-7 Ball bearings with seal and shield For example: 6001 RSH Deep groove ball bearings 33 Ball bearings with seal and shield Integral sealing can significantly prolong bearing service life because it keeps lubricant in the bearing and contaminants out of it. Shields There is a small gap between the shield and inner ring. Bearings fitted with shields are used where the operating conditions are relatively clean, or where low friction is important because of speed or operating temperature considerations. 34 17 2/26/2021 Ball bearings with seal and shield Seals Bearings with seals are preferred for arrangements where contamination is moderate. Where the presence of water or moisture cannot be ruled out, contact seals are typically used. These seals make positive contact with the sliding surface on one of the bearing rings. Low-friction seals and non-contact seals can accommodate the same speeds as bearings with shields, but with improved sealing effectiveness. non-contact seals 35 Low-friction seals contact seals Ball bearings with seal and shield SKF Example design (Page 45) Low-friction seals Contact seals 36 18 2/26/2021 Angular contact ball bearings اﻳﻦ ﻧﻮع ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﻃﺮاﺣﻲ ﺷﺪه اﻧﺪ ﺗﺎ ﻋﻼوه ﺑﺮ ﺑﺎر ﺷﻌﺎﻋﻲ ﺑﺎر ﻣﺤﻮري ﻧﻴﺰ ﺗﺤﻤﻞ ﻧﻤﺎﻳﺪ. ﺑﺎ اﻓﺰاﻳﺶ زاوﻳﻪ ﺗﻤﺎس )(contact angleﻣﻴﺰان ﺗﺤﻤﻞ ﺑﺎر ﻣﺤﻮري ﻧﻴﺰ ﺑﻴﺸﺮ ﻣﻲ ﺷﻮد.زاوﻳﻪ ﺗﻤﺎس ﻋﻤﻮﻣﺎ ﺣﺪاﻛﺜﺮ 40درﺟﻪ اﺳﺖ ﺟﻬﺖ ﻧﻴﺮوﻫﺎﻳﻲ ﻛﻪ وارد ﻣﻲ ﺷﻮد. ﭼﻨﺎﻧﭽﻪ ﺧﻼف اﻳﻦ ﺟﻬﺖ ﻧﻴﺮو وارد ﺷﻮد؟ 37 Angular contact ball bearings در اﻳﻦ ﻧﻮع ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﻧﻴﺮو از رﻳﻨﮓ داﺧﻠﻲ ﺑﻪ رﻳﻨﮓ ﺧﺎرﺟﻲ اﻧﺘﻘﺎل ﭘﻴﺪا ﻣﻲ ﻛﻨﺪ .اﻳﻦ اﻧﺘﻘﺎلدر واﻗﻊ ﺗﺤﺖ زاوﻳﻪ اي اﺳﺖ )(contact angleﻛﻪ ﺑﺎ ﺧﻂ ﻣﺮﻛﺰي )(center line ﺑﻮﺟﻮد ﻣﻲ آﻳﺪ. اﻳﻦ زاوﻳﻪ ﺑﺎﻋﺚ ﺑﻮﺟﻮد آﻣﺪن ﻳﻚ ﺗﻐﻴﻴﺮ ﻣﻜﺎن در ﻣﺮﻛﺰ ﺑﻠﺒﺮﻳﻨﮓ ﻣﻲ ﮔﺮدد) .ﺷﻜﻞ (1 در ﺣﺎﻟﺘﻲ ﻛﻪ ﻳﻚ ﻋﺪد از اﻳﻦ ﻧﻮع ﺑﻠﺒﺮﻳﻨﮕﻬﺎ اﺳﺘﻔﺎده ﻣﻲ ﺷﻮد ،ﻓﻘﻂ ﻧﻴﺮو در ﻳﻚ ﺟﻬﺖ ﻣﻲﺗﻮاﻧﺪ وارد ﺷﻮد) .ﺷﻜﻞ(2 )ﺷﻜﻞ (1 19 )ﺷﻜﻞ (2 38 2/26/2021 Angular contact ball bearings . اﻳﻦ ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﻋﻤﻮﻣﺎ ﺑﻪ ﺻﻮرت ﺟﻔﺖ اﺳﺘﻔﺎده ﻣﻲ ﺷﻮﻧﺪ- Bearings mounted back-to-back provide a relatively rigid bearing arrangement. The wide span between bearing effective centers makes this arrangement particularly well suited to support moment loads. 39 Angular contact ball bearings . اﻳﻦ ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﻋﻤﻮﻣﺎ ﺑﻪ ﺻﻮرت ﺟﻔﺖ اﺳﺘﻔﺎده ﻣﻲ ﺷﻮﻧﺪ- The shorter span between effective bearing centres makes face-to-face arrangements less suitable to support moment loads compared to bearings in a back-to-back arrangement. 40 20 2/26/2021 Angular contact ball bearings . اﻳﻦ ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﻋﻤﻮﻣﺎ ﺑﻪ ﺻﻮرت ﺟﻔﺖ اﺳﺘﻔﺎده ﻣﻲ ﺷﻮﻧﺪThe tandem arrangement, called the DT mounting, is used where the thrust is always in the same direction; Since the two bearings have their thrust functions in the same direction, a preload, if required, must be obtained in some other manner. 41 Double row ball bearing - Better radial loads can be tolerated - Moderate speed and poor axial load 42 21 2/26/2021 Self-aligning ball bearings The bearings are insensitive to angular misalignment of the shaft relative to the housing, which can be caused, for example, by shaft deflection. 43 Thrust ball bearing - No radial load - Good axial load 44 22 2/26/2021 Cylindrical Roller bearing Line contact – greater load – more rolling resistance Types of roller bearing: - Cylindrical - Tapered - Barrel (Spherical) 45 Cylindrical roller bearing Cylindrical roller bearings are not design to take much axial loads SKF single row cylindrical roller bearings are available in many designs, series and sizes. The major design differences between the bearings presented in this section are in: - the cage design and material - the configuration of the inner and outer ring flanges NU N NJ NUP 46 23 2/26/2021 Cylindrical roller bearing 1) :روﻟﺮ ﺑﺮﻳﻨﮕﻬﺎ ﻧﻴﺰ در اﻧﻮاع ﻣﺨﺘﻠﻔﻲ ﺗﻮﻟﻴﺪ ﻣﻲ ﺷﻮﻧﺪ Cylindrical roller bearings, single row 2) High-capacity cylindrical roller bearings: SKF high-capacity cylindrical roller bearings have the high load carrying capacity of full complement bearings and the high speed capability of bearings with cage. 3) Double row cylindrical roller bearings 4) Four-row cylindrical roller bearings 2 .1 47 4 3 Tapered roller bearing Normally used as pairs facing to each other to handle trust loads in both directions 48 24 2/26/2021 Tapered roller bearing- assembly Normally used as pairs facing to each other to handle trust loads in both directions 49 Barrel (Spherical) roller bearing - High load carrying capacity - Ability to accommodate misalignment helps you obtain low maintenance costs and long bearing service life. - Available in both open and sealed types. 50 25 2/26/2021 Needle bearing – linear bearings Needle bearing linear bearing 51 اﺳﻤﺒﻠﻲ ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ-8 • در ﺣﺎﻟﺖ ﻛﻠﻲ ﺑﻬﺘﺮ اﺳﺖ از ﻗﻮاﻧﻴﻦ و دﺳﺘﻮراﻟﻌﻤﻞ ﻫﺎي ﺳﺎزﻧﺪه ﭘﻴﺮوي ﺷﻮد وﻟﻲ در ﺣﺎﻟﺖ :ﻛﻠﻲ ﻣﻮارد زﻳﺮ را ﻣﻲ ﺗﻮان ﭘﻴﺸﻨﻬﺎد ﻧﻤﻮد ﻣﻮﻧﺘﺎژpress fit (ﺑﺎ ﺗﻠﺮاﻧﺲrotating ring) رﻳﻨﮓ )ﻃﻮﻗﻪ( ﭼﺮﺧﻨﺪه ﺑﻠﺒﺮﻳﻨﮓ-1 .ﺷﻮد push fit ( ﺑﺎ ﺗﻠﺮاﻧﺲnon-rotating ring) رﻳﻨﮓ )ﻃﻮﻗﻪ( ﻣﺘﺤﺮك ﺑﻠﺒﺮﻳﻨﮓ-2 .ﻣﻮﻧﺘﺎژ ﻣﻲ ﺷﻮد Bearings are usually mounted with the rotating ring a press fit, whether it be the inner or outer ring (To ensure that the bearing ring will not slip or rotate). The stationary ring is then mounted with a push fit. This permits the stationary ring to creep in its mounting slightly, bringing new portions of the ring into the loadbearing zone to equalize wear. (For example allow an axial slip in thermal expansion cases) 52 26 2/26/2021 اﺳﻤﺒﻠﻲ ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ-8 press fit (ﺑﺎ ﺗﻠﺮاﻧﺲrotating ring) رﻳﻨﮓ )ﻃﻮﻗﻪ( ﭼﺮﺧﻨﺪه ﺑﻠﺒﺮﻳﻨﮓ-1 push fit ( ﺑﺎ ﺗﻠﺮاﻧﺲnon-rotating ring) رﻳﻨﮓ )ﻃﻮﻗﻪ( ﻣﺘﺤﺮك ﺑﻠﺒﺮﻳﻨﮓ-2 53 اﺳﻤﺒﻠﻲ ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ- 8 Preloading The purpose of preloading is to remove the internal clearance usually found in bearings, to increase the fatigue life, and to decrease the shaft slope at the bearing. 54 27 2/26/2021 -8اﺳﻤﺒﻠﻲ ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ از ﻧﻈﺮ ﻋﻤﻠﻲ ﺑﻪ 2ﺷﻜﻞ ﻣﻤﻜﻦ اﺳﺖ اﻧﺠﺎم ﺷﻮد: press fit -1 shrink fit – 2 55 -8اﺳﻤﺒﻠﻲ ﻳﺎﺗﺎﻗﺎﻧﻬﺎي ﻏﻠﺘﺸﻲ در اﻧﺠﺎم ﻓﺮاﻳﻨﺪ shrink fit ﺑﺎﻳﺪ ﻣﻘﺪار ﺗﻐﻴﻴﺮ ﻗﻄﺮ را در اﺛﺮ ﺣﺮارت ﺑﺪاﻧﻴﻢ ﺗﺎ ﻓﺸﺎر ﻧﻬﺎﻳﻲ اﻋﻤﺎﻟﻲ را ﻣﺤﺎﺳﺒﻪ ﻧﻤﺎﻳﻴﻢ. 56 28 2/26/2021 -9ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﺷﻤﺎره ﮔﺬاري ﺑﻠﺒﺮﻳﻨﮕﻬﺎ از ﺳﻪ ﺟﺰء ﺗﺸﻜﻴﻞ ﺷﺪه اﺳﺖ ZZ 6 3 05 Type Width Outside Dia Series Bore 57 ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ -ﺗﺸﺨﻴﺺ ﻗﻄﺮ ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﺑﺮاي ﺑﻠﺒﺮﻳﻨﮕﻬﺎﻳﻲ ﻛﻪ ﺳﻪ ﻋﺪد دارﻧﺪ – ﻋﺪد آﺧﺮ ﻫﻤﺎن ﻗﻄﺮ اﺳﺖ.601: OD=01 mm 602: OD=02 mm …. 609: OD=09 mm ﺑﺮاي ﺑﻠﺒﺮﻳﻨﮕﻬﺎﻳﻲ ﻛﻪ 4اﻟﻲ 5ﻋﺪد دارﻧﺪ و ﺑﻪ اﻋﺪاد 00و 01و 02و 03ﺗﻤﺎم ﻣﻲ ﺷﻮﻧﺪ -ﻗﻄﺮ 10اﻟﻲ 17ﻣﻴﻠﻴﻤﺘﺮ دارﻧﺪ. XX00: OD=10 mm XX01: OD=12 mm XX02: OD=15 mm XX03: OD=17 mm ﺑﺮاي ﺑﻠﺒﺮﻳﻨﮕﻬﺎي 4اﻟﻲ 5ﻋﺪدي ﻛﻪ ﺑﻪ ﻋﺪد 04و ﺑﻴﺸﺘﺮ ﺗﻤﺎم ﻣﻲ ﺷﻮﻧﺪ-ﻋﺪد آﺧﺮ در 5ﺿﺮب ﻣﻲ ﺷﻮد. XX04: OD=20 mm XX05: OD=25 mm ……. XX096: OD=480 mm 29 58 2/26/2021 ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﺑﺮاي ﺑﻠﺒﺮﻳﻨﮕﻬﺎي 4اﻟﻲ 5ﻋﺪدي ﺑﻪ ﻋﺪد 04و ﺑﻴﺸﺘﺮ از 480ﻗﻄﺮ داﺷﺘﻪﺑﺎﺷﻨﺪ ﺧﻮد ﻋﺪد ﻗﻄﺮ اﺳﺖ. XX520: OD=520 mm XX6800: OD=6800 mm ……. 59 ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ -ﻛﺎﺗﺎﻟﻮگ SKF 60 30 2/26/2021 ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﻧﻮع ﺑﻠﺒﺮﻳﻨﮕﻬﺎ: )(Bearing type 61 ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﻧﻮع ﺑﻠﺒﺮﻳﻨﮕﻬﺎ: )(Bearing type 62 31 2/26/2021 ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﻧﻮع ﺑﻠﺒﺮﻳﻨﮕﻬﺎ(Bearing type) : 63 ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﻧﻮع ﺑﻠﺒﺮﻳﻨﮕﻬﺎ(Bearing type) : 64 32 2/26/2021 ﻧﺎﻣﮕﺬاري در ﺑﻠﺒﺮﻳﻨﮕﻬﺎ ﻧﻮع ﺑﻠﺒﺮﻳﻨﮕﻬﺎ(Bearing type) : 65 33
