Section 9: Gearboxes: Series F

Transcription

1 GEARBOXES Section 9: Gearboxes: Series F The new Fenner Series F geared motor range is primarily designed as a compact shaft mounted unit incorporating an integral torque reaction bracket. ew range now has 11 sizes power up to 110 torque up to 16,500 Ratios from 5:1 to 350:1 available Dimensionally interchangeable with market leaders Accepts standard IEC motors ATEX certification available Geared Drives: Design Data Required Motorised (integral motor) or non-motorised? Shaft mounting or flange mounted? Type of driven machine Rotational speed of driven machine absorbed by driven machine (or required output torque) Hours/day duty & start/stop frequency Visit > If motorised: electrical supply available any special motor features required (brake, thermistors, flameproof etc.) > If non-motorised: type of prime mover rotational speed of prime mover power rating of prime mover is an input shaft coupling required? If so, prime mover shaft dia. > If shaft mounted, machine shaft diameter/length > if flange mounted, is an output shaft and coupling required? > constant or variable over what range? Series F Page Motorised 249 Motorised Dimensions 250 on Motorised 266 Reducer Dimensions 273 Exact Ratios 274 B14 Flange Dimensions 275 s 276 Installation & Maintenance 277 Lubrication 278 Bush Dimensions 279 Ordering Instructions 280

2 SERIES F Highly Efficient and Versatile. Compact solutions > ew range now has 11 sizes > power up to 110 > torque up to 16,500 > Ratios from 5:1 to 350:1 available > Dimensionally interchangeable with market leaders > Accepts standard IEC motors > ATEX certification available The Mark of Engineering Excellence

3 GeArboxes Series F Gearboxes : Motorised selection MOTORISED UITS SELECTIO PROCEDURE (a) From Table 1 select the Mechanical (Fm) applicable to the drive. If the unit is to be subjected to frequent stop/starts in excess of 10 times per day then multiply factor Fm by Fs from table 2 below. (b) Motor Refer to the selection tables on pages 249 to 263 and choose a motor power equal to or in excess of that required, if the motor power is not known then from the formula below determine the power requirements of the driven machine and select a motor power in excess of the calculated machine absorbed power. M 2 x n 2 P2 = 9550 P 2 = machine absorbed power () M 2 = machine absorbed torque () n 2 = machine speed (rev/min) If the absorbed power is given in use the formula below to check the selected unit will give sufficient output torque. torque values for Fenner Series F Gear Motor units are given in column two of the selection tables. M P 2 x = n M 2 = machine absorbed torque () P 2 = machine absorbed power () n 2 = machine speed (rev/min) (c) Refer to the selection tables on page 249 to 263 and choose the closest above that calculated in step (b). Then read down the column headed until a speed equal to or near to the required speed is found. On this line read across to the service factor column and check that the service factor exceeds the value from step (a). If the service factor is either lower or much higher than that required check the speeds at each side of the required speed to see if a more suitable unit and factor can be found. (d) s If the unit is to be fitted with an output shaft and an indirect drive attached to the shaft, calculate the overhung load value using the formula on page 276 and compare this value with the maximum allowable value given in column 5 of the selection tables. If the value exceeds the maximum allowed, then either re-design the indirect drive or select a larger unit capable of supporting the overhung load. (e) Shaft Mounted If the unit is to be shaft mounted determine the relevant machine shaft size from the dimension tables on page 264. bush dimensions can be found on page 279. SELECTIO EXAMPLE A Series F shaft mounted gearbox is required to drive a non-uniformly loaded conveyor, which absorbs 2 at 48 rpm and operates for up to 16 hours per day. The conveyor stops and starts on average 6 times a day. Specify the shaft diameter required to fit the unit selected, a torque bush is also required please specify the relevant product code. (a) From table 1 a non-uniformly loaded conveyor is classed as a moderately loaded machine and when running for up to 16 hours per day has a service factor of 1.5. The machine stops and starts only 6 times a day therefore an additional stop/start factor is not required. (b) Motor The absorbed power is given as 2 therefore use the next largest standard motor power above this which is 2.2. To determine the required torque use the absorbed power () and the machine shaft speed in the formula given. Therefore the machine absorbed T = 2 x 9550 = (c) The nearest standard motor power above 2 is 2.2 therefore we go to the 2.2 geared motor selections on page 255. Reading down the column headed nominal output it is found that there are 5 units listed at 48 rpm, at the first one of these read across to service factor column, it can be seen that the unit size 781A1445 has a service factor of 1.31, which does not exceed the 1.5 required service factor therefore read down the table to a factor that equals or exceeds this. TABLE 1 - MECHAICAL SERVICE FACTOR (Fm) Types of Driven Machine Uniform s Agitators and Mixers liquid or semi-liquid Blowers centrifugal Bottling Machines Conveyors and Elevators uniformly loaded Cookers Laundry Washing Machines non-reversing Line Shafts Pumps centrifugal and gear Wire Drawing Machines Moderate Shock s Agitators and Mixers variable density Conveyors not uniformly loaded Cranes travel motion and hoisting Drawbench Feeders pulsating load Hoists Kilns Laundry Tumblers Lifts Pumps reciprocating with 3 or more cylinders Pump and Paper Making Machinery Rubber Mixers and Calendars Screens rotary Textile Machinery Heavy Shock s Brick Presses Briquetting Machines Conveyors reciprocating and shaker Crushers Feeders reciprocating Hammer Mills Pumps reciprocating, 1 or 2 cylinders Rubber Masticators Screens vibrating TABLE 2 - STARTIG FACTOR (Fs) It can be seen that the 783A1445 is the first unit with a factor above 1.5, the last two digits of the product code (45) indicate that this unit is fitted with a 6 pole motor, it is usually more economical to select a 4 pole version if possible. Therefore the next unit down 783A1836 would be selected as this is the same size gearbox (783), and has a service factor of 1.58 exceeding the required value of 1.5. The output torque for this selection is 422 which exceeds the required 398, therefore is suitable for the application. (d) s The gearbox is to be shaft mounted therefore no overhung loads present. (e) Shaft Mounted The unit is to be shaft mounted, referring to page 264 we see that the hub bore size is 40mm. From page 279 the torque bush to suit the size 783 unit selected has a product code of 881A9600. Operational Hours Under 3 3 to 10 Over Start/stops per hour Up to >200 Fs For high inertia applications, consult you local Authorised Distributor for verification of selection. FE01/14 : Drive Design & Maintenance Manual 249

4 Roller Chain Drive Series F Gearboxes : Motorised selection GEARBOXES Bold print indicates a 6 pole motor is used Double reduction Triple reduction 0.12 KW Motor A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A KW Motor A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A

5 GEARBOXES Series F Gearboxes : Motorised selection Roller Chain Drive 0.25 KW Motor A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A KW Motor A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A FE01/14 : Drive Design & Maintenance Manual 251

6 Roller Chain Drive Series F Gearboxes : Motorised selection GEARBOXES Bold print indicates a 6 pole motor is used Double reduction Triple reduction A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A KW Motor A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A

7 GEARBOXES Series F Gearboxes : Motorised selection Roller Chain Drive 0.75 KW Motor A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A KW Motor A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A FE01/14 : Drive Design & Maintenance Manual 253

8 GEARBOXES Series F Gearboxes : Motorised selection Bold print indicates a 6 pole motor is used Double reduction Triple reduction A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A KW Motor A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A

9 GEARBOXES Series F Gearboxes : Motorised selection A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A KW Motor A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A FE01/14 : Drive Design & Maintenance Manual 255

10 GEARBOXES Series F Gearboxes : Motorised selection Bold print indicates a 6 pole motor is used Double reduction Triple reduction A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A KW Motor A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A