EXPLOSION-PROOF BEARING HOUSING OF ELECTRIC MOTOR Russian patent published in 1997 - IPC

FIELD: electric engineering. SUBSTANCE: device has rolling bearing 2 which is mounted on shaft 1, bearing cap 3, which has ring groove 4 in which sleeve is mounted for axial and radial movement. Sleeve 5, bearing cap 3 and shaft 1 provide explosion- proof longitudinal slots. Length of explosion-proof longitudinal slot between bearing cap 3 and sleeve 5 is less than length of explosion- proof longitudinal slot between sleeve 5 and shaft 1. End surfaces of ring groove 4 and sleeve 5 provide additional explosion-proof flat slots which total maximal size when sleeve 5 glides to rest in end of ring groove of is not less than total size of explosion-proof longitudinal slots between ring groove 4 of bearing cap 3 and sleeve 5 and between sleeve 5 and shaft 1 ((W₁+W₂≅ W_d1+W_d2)). Width and length of explosion-proof longitudinal slots between bearing cap 3 and sleeve 5 and between sleeve 5 and shaft 1 conform to conditions 0,8 < W_d1/W_d2≅ 1 and L₁/L₂≥ 0,32, where W₁ is width of explosion-proof flat slot between bearing cap and sleeve; W₂ is width of explosion-proof flat slot between sleeve and bearing cap; W_d1 is width of explosion-proof longitudinal slot between bearing cap and sleeve; W_d2 is width of explosion-proof longitudinal slot between sleeve and shaft; L₁ is length of explosion-proof longitudinal slot between bearing cap and shaft; L₂ is length of explosion-proof longitudinal slot between sleeve and shaft. EFFECT: increased functional capabilities, increased protection against explosion. 2 dwg