Text version of the page 
Text version of the page 
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Selecting a Gear Unit Examples of load types for gear units: | | | | | | The selection lists provides for the combination of U | | | | | | | | | | worm gear units with 4-pole standard AC motors, the resulting gear output torque M2 output speeds n2 and operating factors fB. The operating factor fg mark the safetyof the gears with the given drive power. Each application has specific loads depending on factors such as jolts, frequent starts, intermittent operation and increased ambient temperatur, and therefore demands a specific minimal operating factor fBmin in order to guarantee reliable operation. You should note during gear unit selection with the aid of the selection list that the drive selected indicates the same or a greater operating factor fB as the minimal operating factor fBmin. The selection list "n1 = 1400 / 900 / 500 / 250 min-1" starting on page 50 is practical if a 4-pole standard AC motor is not attached. The selection list uses the operating factor fB = 1.0 as a basis. Taking into account the minimal operating factor fBmin, the installed motor power maybe at most Pemax /femin. The required minimal operating factor fBmin for an application is calculated as follows: fBmin =fB0 *fB1 *fB2 The operating factor takes into account load type A, B or C, the frequencyof activation and dailyrun time. The operating factor fB1 takes into account different ambient temperatures. The operating factor fB2 takes into account intermittent operation. The diagram below is used when determining the operating factors fB0,fB1 and fB2. | | | | | | B Decoilers, feed drives for wood processing machines, hoists manufacturer, balancing machines, tapping units, mid-sized industrial stirrers and mixers, winches, sliding doors, stall dunging machines, packaging machines, bending machines manufacturer and gear pumps. C Scissors, presses, punchers, nut bevelling machines, polishing and grinding drums, agitators and choppers. Load types A, B, and C are defined as follows: A: constant operation and maf < 0.25 B: irregular operation and maf < 3 C: highlyirregular operation and maf < 10 In which maf is the mass acceleration factor: . ^ex.red. | | | | | | | | | | Jex red = all external mass moments of inertia are reduced to the drive motor Jmot = mass moments of interia of the motor with maf > 10 are offered upon inquiry. | | | | | | | | | | | | | | irs / | | | | | | Operating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * | | | | | | | 24 | IS. | A | A | C | lagram | | | | | | _2_ | | - | - | - | — | - | - | | - | - | - | - | - | - | - | | | | | | | | | | | | | | c | | | | | | | | | | | 1,9- | 1,8' | 1,7- | 1,5 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1.7- | 1,6" | 1.4' | | - | - | — | - | - | - | - | - | - | - | - | - | - | - | | | | 1,8- | | | T | | | | | | | | | | | | | | | | | | | | 1 5" | 1,3' | | - | - | — | - | - | - | - | - | - | - | - | - | - | - | | | | 1,7" | 1,6' | | | | | | | | | | | | _ | _ | | - | — | — | | | | | 1.5- | 1.4- | 1,2 | | | | | | | | | | | | | | | | | | | 1,6- | | 1,3' | 1,1 | — | | - | — | - | - | - | - | - | - | - | - | - | - | - | | | | | 1,4" | | | / | | | | | | A | | | | | | | | | | | | | | 1 2 - | 1.0 | L_ | | | | | | A | | | | | | | | | | | | | | | f | | | | | | | | | | | | | | | | | 1,5" | 1,3- | | | | | | __, | | — | — | | | | | | | | | | | | 1,4- | 1,2- | 1,1' | 0,9' | s | | | | | | | | | | | | | | | | | | 1,0- | 0,8 | f- | - | - | — | - | - | — | - | - | - | - | - | - | - | - | | | | 1 3 | 11 | | SI | | | | | | | | | | | | | | | | | | | | | - | - | - | — | - | - | — | - | - | - | - | - | - | - | - | | | | | | C | ) 200 41 | )0 | 6 | 30 8 | 00 | 1000 | 1200 1400 | | | | | | | 100 3C | )0 5 | 00 | 700 | 9 | 00 11 | 00 | i: | S00 15 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | www.nord.com G 1035 12 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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