锤片粉碎机设计(3)

2020-02-21 16:06

下辊轴直径:dc??0.5~0.6?Dc=130mm 最小卷圆直径:

Dn??1.25~2.5?Da=600mm

筒体回弹前内径: Dn??4.1.2 主电机的功率确定

D1?(2K1?SK2/2D)ES?sD=506.607mm

因在卷制板材时,板材不同成形量所需的电机功率也不相同,所以要确定主电机功率,板材成形需按四次成形计算:

1.成形40%时

1)板料变形为40%的基本参数

?.4?Dn?? D0R'0.450.6607mm ?126.56180.4D?S1266.518?12?n0.4??639.259mm

22sin?0.439022???0.235 sDc639.259?6?120R'0.4??22ttg?0.4?0.242

2)板料由平板开始弯曲时的初始弯矩M1

M1?K1W?s?1.5?4.8?104?235?1.692?107 kgf·mm

BS22000?122??4.8?104 W为板材的抗弯截面模量。W?663)板料变形40%时的最大弯矩M0.4

M0.4?(K1?K0S11.6?12)W??s?(1.5?)?4.8?104?235?1.815?107 2R'0.42?639.259kgf·mm

4)板料从R'?卷制到R'0.4时的变形弯矩Mn1

Mn1?(M1?M0.4)(11Dc?) R'0.4R'0411?240?????3.292?106kgf· ?(1.692?1.815)?107??mm

639.259?4??上辊受力:

Pa0.42M0.42?1.815?107???2.325?105kgf

S??'?639.259?6??0.242R?tg??0.4?0.42??下辊受力: Pc0.4M0.41.815?107???1.197?105kgf

S??'?639.259?6??0.235R?Sin??0.4?0.42??5)消耗于摩擦的摩擦阻力矩Mn2

Mn2?f?Pa0.4?2Pc0.4??m?PadaDc?m?Pcdc2Da

180240??0.06?1.197?105?1302300?0.8??2.325?1.192?2??105?0.06?2.325?105?

=2.315?106 kgf·mm

6)板料送进时的摩擦阻力矩MT

MT?f?Pa?2Pc??m?PaDcdaDa2

180240?2300?1.381?106

?0.8??3.292?2.325?2??105?0.06?3.292?105?kgf·mm

7)拉力在轴承中所引起的摩擦阻力矩Mn3 Mn3??Mn1?MT??m?dcDc??32.92?13.81??105?0.06?130?1.519?105 240kgf·mm

8)锤片粉碎机送进板料时的总力矩Mp

56mm Mp?mPcDc?0.18?1.197?10?240?5.171?10 kgf·

9)锤片粉碎机空载时的扭矩Mn4:

G1:板料重量G1:

2??DnS?2?DnS??G1?????????????b?7.8?10?6?22?????22??

2??60012?2?60012???????????????2000?7.8?10?6?588.106kg

2?2???2???2?G2:联轴器的重量[8]: 选ZL10,G2=180.9kg

G3:下辊重量:

?240?G3?2???2?7.8?10?6??????2500?1764.318kg

?2?Mn4?m??G1?G2?G3??dc 2130?9.88?1032

2?0.06??588.106?180.9?1764.318??kgf·mm

10)卷板时板料不打滑的条件:

Mn1?MT?Mn4?Mp

Mn1?MT?Mn4?3.292?106?1.381?106?9.88?103?4.682?106

kgf·mm

mm Mp?5.171?106 kgf·

因为Mn1?MT?Mn4?Mp,所以满足。

11)驱动功率:

Mn?Mn1?Mn2?Mn3?Mn4?5.769?106 kgf·mm

d2VNq?[Mn??P(f??)]

2Dc?2?0.15?[5.769?106?3.522?10(0.8?0.06?75)]?7.954k

240?0.8w

2. 成形70%时

1)板料成型70%的基本参数

D'506.607D0.7'?n??723.724mm

0.70.7R0.7'?Dn0.7'?S?367.862mm 2Sin?0.739022???0.395 SDc367.862?6?120R'0.7??22tTg?0.7?0.429

2)板料变形70%时的最大弯矩M0.7

11.6?12????KSM0.7??K?0W??1.5??4.8?104?235'?s??(2?R0.7)?2?367.862???

?1.905?107 kgf·mm

Pa0.7'2M0.72?1.905?107???2.376?105kgf

12S??(367.862?)?0.429R'?Tg??0.7?0.722??M0.71.905?107???1.289?105kgf

12S??(367.862?)?0.395R'?Sin??0.7?0.722??Pc0.7'3)板料从R'0.4变化到R'0.7时的板料变形弯矩Mn1

?11?Dc?Mn1??Mn0.4?M0.7????R?4 R0.4??0.711??240??1.851?1.905??107????2.601?106 ???367.862639.259?4kgf·mm

4)消耗于摩擦的扭矩Mn2

Mn2?f?Pa'?2Pc'??M'Pa'daDc??M'Pcdc 2Da?0.8??2.376?2?1.289??105?0.06?2.376??2.428?106 kgf·mm

180240??105?0.06?1.289?130?10523005)板料送进时的摩擦阻力矩MT

MT?f?Pa'?2Pc'??M'Pa'dcDc? 2Da1802405?0.8?(2.7?36?21.?2589)?10?0.06?2.?736?2300kgf·mm 6)拉力在轴承中所引起的摩擦损失Mn3

Mn3??Mn1?MT?m?dc130??2.601?106?1.423?106??0.06? Dc240?6 1?01.42310?1.308?105

kgf·mm

7)机器送进板料时的总力矩Mp

56mm Mp?MPcDc?0.18?1.289?10?240?5.568?10 kgf·

8)锤片粉碎机空载时的扭矩Mn4?9.88?103 kgf·mm 9)板料不打滑的条件

Mn1?Mn4?MT?2.601?106?9.88?103?1.423?106?4.033?106

kgf·mm

因Mn1?Mn4?MT?MP,所以满足。 10)驱动功率

Mn?Mn1?Mn2?Mn3?Mn4

?(2.601?2.428?0.1308?0.00988)?106?5.169?106

kgf·mm

d2VNq?[Mn??P(f??)]

2Dc?2?0.15?[5.169?106?3.665?10(0.8?0.06?75)]?7.408kw

240?0.83.成形90%时

1) 板料成型90%的基本参数

'? D0.9R0.9'Dn'506.607??562.8mm 99 0.90.9562.899?12??287.45mm

2


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