Bevel-helical gearbox B4 er GmbH Flender MD Options for operation Cooli B4-KV-15B

Flender/Flender Gear Units/Bevel-helical gearbox B4

velocity at the tip of the pinion tooth (Table 4..Table 4.4 Calculation of ash factor Designation Formula No. Flash factor XME1 1 1 4BMIf 1E2and1 (4. where: BM 0:0/C1MMcMp Mthermal conductivity Mdensity cMspecic thermal capacity per unit of mass(4. For common steels: XM5:0Ks1 2mm N3 4m1(4. Table 4.4 Calculation of mesh approach factor Designation Formula No. Mesh approach factor for pinion driving wheelXJ1a /C2 (4. XJ1CeffCa2 5Y A/C1/C1 atY<0(4. Mesh approach factor for wheel driving pinionXJ1a /C2 (4. XJ1CeffCa1 5Y A/C1/C1 atY>0(4. CeffKAKmpFt bcostc(4. where: Kmp1 number of mates meshing with the actual gear c2 /(mm )approximate value for mesh stiffness according to [ ISO1 ] Part 1 Ca1,2amount of tip relief pinion/wheel4.2 Load Capacity Calculation 1 Bulk temperature MThe maximum contact temperature is given by the maxi- mum ash temperature maxand the bulk temperature , which can be calculated as described in Table 4.4. Permissible contact temperature The calculated maximum contact temperature Bmax is compared to the permissible contact temperature . This can be deter- mined in scufng test, .., the FZG-/8.3/9 test [ DIN5 ] for lubricants with no or few additives or other test procedures [ FVA2 ] for EP-lubricants. For the FZG-/8.3/9 test, the permissible contact temperature is calculated according tothe following relationship (Table 4.:Table 4.4 Calculation of geometry factor Designation Formula No. Geometry factor XG0:5/C1X/C1cot1cot2 1=4/C1yp 1y/C1tan1=tan2p/C1/C1/C1/C1 1y/C1=4/C1y/C1tan1=tan2/C1=4 where: Xinuence factor of pressure and spiral angle X1 approximate value for gears with normal pressure angle of n2/C1(4. Table 4.4 Calculation of bulk temperature Designation Formula No. Bulk temperature Moil0:4/C1XSXmpfl (4. where: XSlubrication factor 1.0 for dip lubrication 1.2 for injection lubrication0.2 for dip lubrication under optimum cooling conditions mp1np 2(npnumber of wheels meshing wit