Perhitungan

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PERHITUNGAN DAYA MOTOR direncanakan : F ( beban ) L ( panjang poros dari motor sampai blade ) f ( frekuensi standard motor ) p (jumlah kutub)

= = = = = =

1 kW 1 kW Torsi pada motor listrik (M)

= =

kec. Sinkron medan stator (n)

= =

daya motor listrik INDUKSI (P)

= = = =

PERHITUNGAN POROS Diketahui M n P

= = =

0.6 3000 0.252

Pada Elemen Mesin direncanakan poros mempunyai beban puntir fc Penentuan Daya Desain (Pd) Mengubah Daya Desain Menjadi Torsi T Menghitung diameter poros berdasarkan beban torsi d

=

0.5 = = 5

= =

9.74 . 10 x (Pd/n) 40.98

= =

[5.1T/ζ]1/3 9

σb

sf1 sf2 dimana

= maka termasuk jenis material poros = S50C = = = ζ = ζa = Tegangan Geser Ijin Material ζa

62 (kg/mm2)

6 untuk jenis material SC (1.3 s/d 3.0) 1.3 =

σb (sf1 x sf2)

=

7.95

Koreksi diameter akibat Beban Kejut (kt) jika beban yang dikenakan dengan kejutan atau tumbukan besar direncanakan (kt) = (1.5 s/d 3.0) = 1.5 Koreksi diameter akibat Beban Lentur (Cb) direncanakan (Cb) = (1.2 s/d 2.3) = 1.2 Pehitungan Diameter Poros Terkoreksi d

= = =

[5.1T*kt.Cb/ζ]1/3 15.78 0.631

MOTOR 10 0.06 50 2 1.34 1000

Newton meter Hz HP Watt

FXL 0.6 Nm

f x 120 (Rpm) p 3000 Rpm

2 x phi . 60 x 1000 0.188 188.4 0.252

n.M kW Watt HP

OROS Nm Rpm HP

P x fc 0.126 HP

kgmm

mm

(kW)

ntuk jenis material SC

(kg/mm2)

mm inch

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