Gearbox standard series Your industrial Gearboxes. Standard Industrial NH/NHK

Transcription

1 Standard Industrial 1

2 Contents Gear Design and Construction 3 Service Factors 5 Example of Selection 7 Spur Gearboxes NH I 8 NH II, NHS II, NHZ I2 NH III, NHS III, NHZ II7 NH IV, NHS IV, NHZ IV 23 Bevel and Spur Gearboxes NHK II, NHKS II, NHKZ II 28 NHK III, NHKS III, NHKZ III 33 NHK IV, NHKS IV 39 Hollow Shaft Design 43 Built-in cooler connection dimensions 45 Installation examples 46 Range of Products 47 This catalogue is in force subject to changes that may have been introduced since printing, adaptation to new regulations or new scientific knowledge. Copyright according to DIN 34. 2

3 Standard NH Series Gearbox Design and Construction General The NH series of Gamesa Gearbox are the result of many years experience in the construction of modern heavy-duty gearboxes. The design and construction of these gearboxes is of proven quality and reflects the state of the art in drive technology. These gearboxes are manufactured with the aid of the latest available machine tools. All stages of production are continuously monitored with a view to ensuring optimal quality as well as low noise operation and high levels of efficiency. Prior to delivery every gearbox is operated for several hours and subjected to stringent acceptance tests. The various gear ratios, main dimensions and sizes are standardised: this is essential for economic production and storage. Housings The torsionally rigid housings with substantial internal ribs are made from fabricated steel. They are designed to minimise vibrations, and ensure that all operational forces are reliably absorbed. No oil can escape nor can any dust or moisture enter the housing. The gearing, the bearings and the oil supply system can be easily checked through a large inspection aperture. Special models consisting of nodular cast iron, or cast steel can be supplied if required. Gear-wheels All gear-wheels are made from highly wear-resistant case-hardened and ground alloy steels, and have profile-corrected involute helical gear teeth in accordance with the latest scientific trends and manufacturing processes. Bevel wheels have casehardened and lapped profile-corrected spiral gearing. The high load carrying capacity of the gears allows for a compact and weight saving design of the gearboxes. Bearings and shafts All shafts are supported by conservatively dimensioned high-precision roller bearings. The bearings match the high performance characteristics of the gearboxes in general. The bearing seats, sealing points and gear-wheel seats on the shafts are ground. The free shaft ends are provided with a threaded centre bore as specified in DIN 332. Capacity and efficiency The listed capacities presuppose smooth operation for not more than 10 hours a day. The starting torque may be twice as high as the listed capacity. However, when deciding on the size of a gearbox, the service factors corresponding to the given application must be taken into account. This is illustrated by the example on page 5. The capacities can be calculated by linear conversion provided that they are within the range of listed driving speeds. The efficiency depends on the number of gear stages. The following percentages apply: 99.0% with single-stage spur gearboxes 98.0% with two-stage spur gearboxes 97.5% with three-stage spur gearboxes 97.0 % with four-stage spur gearboxes 97.5% with two-stage bevel and spur gearboxes 97.0% with three-stage bevel and spur gearboxes 96.5% with four-stage bevel and spur gearboxes Lubrication The bearings and gears are supplied with oil by splash lubrication or, additionally, with the aid of a gear pump. The pump may be attached to the housing or separate from the gearboxes and driven by an electric motor. With standard designs the base of the gearbox also serves as an oil sump. 3

4 Standard NH Series Gearbox Design and Construction Cooling Within certain capacity ranges such heat as is generated during general use can be dissipated via the housing surface. If the maximum thermal capacity of a gearbox is exceeded additional cooling has to be provided. This can be achieved with the aid of an external fan mounted on the input shaft or by cooling the lubricating oil by means of a built-in cooler or separate filter oil cooler. It is also possible to combine an external fan and a built-in cooler if this is necessary under the given operating conditions. The specified maximum thermal capacity values were determined with a gearboxes temperature of 100 C and an ambient or coolant temperature of 20 C. Monitoring operation Gearboxes equipped for forced oil lubrication and with oil filter coolers have ordinary pressure gauges or contact pressure gauges and thermometers enabling operating personnel to monitor their operational state. As regards gearboxes for non-supervised operation additional instruments are required which if a fault develops trigger optical or acoustic signals with the aid of electric contacts or stop the plant via auxiliary circuits. In such cases we recommend the installation of the following additional instruments: Flow monitor, pressure switch, contact thermometer, and temperature sensor for all bearings. Back stop mechanisms Gearboxes for applications in which reverse operation of the machine is not permissible are equipped with back stop mechanisms, attached to the housing or built in. These mechanisms do not require any maintenance. Enquiries or orders should state the required direction of gear rotation and holding torque. Flat and v-belt pulleys, gear wheels and sprockets The bearings enable flat and V-belt pulleys, gearwheels and sprockets of appropriate dimensions to be mounted on the input and output shafts. In order to enable us to judge the need of reinforcing the bearings please state in your enquiry or order: a) The type of component is to be mounted on the stub end of the shaft. b) The maximum outer diameter of the pulleys and/ or sprockets and the distance between the centre distance between the driving and driven shafts. Scope of delivery The gearboxes are despatched in a fully assembled state but without oil. In most cases they are not packaged but bolted to pallets or support frames. Accessories such as oil line fittings and components of the external oil supply system are packed separately, in order to prevent damage during transit. On the inside the housings are coated with oil and impact-proof lacquer. The standard external coating is proof against weak acids and alkalis as well as oils and solvents. The colour of the external coating is in accordance with RAL9005 or RAL9017. The inner protective coating is sufficient for a normal shipping and storage period of 6 months. This does not apply if the gearboxes are stored in an acid atmosphere. In this regard we refer customers to the assembly, maintenance and lubrication instructions supplied with every GAMESA GEARBOX 4

5 NH Series Service factors Machine Excavators f 1 Operating time per day (hours) Chain bucket excavators 1,6 1,8 1,8 Travelling gear (caterpillar) 1,25 1,4 1,6 Travelling gear (rails) 1 1,25 1,4 Suction pumps 1,25 1,4 1,6 Bucket wheels 1,25 1,4 1,6 Cutter heads 1,4 1,8 2 Slewing gear 1 1,25 1,4 Winches 1 1,25 1,4 Mining, stones Crushers 2 Rotary kilns 1,6 Mine ventilators 1,8 Vibrators 1,6 Chemical plant Agitators (thin liquid) 0,9 1 1,25 Agitators (viscous liquid) 1 1,25 1,4 Centrifuges (thin) 1 1,25 1,4 Centrifuges (viscous) 1,4 1,6 1,8 Conveyor plant Conveyors 1,8 Slatted conveyors 1 1,4 1,6 Belt conveyors (bulk materials) 0,9 1 1,25 Slatted conveyors (piece goods) 1 1,25 1,4 Pocket belt conveyors 0,9 1 1,25 Reels 1 1,4 1,6 Bucket chain conveyors 1 1,25 1,4 Rotary conveyors 1 1,25 1,4 Elevators 1 1,25 1,4 Bucket type flour elevators 0,9 1 1,25 Machine 5 f 1 Operating time per day (hours) Lifts 1,4 1,6 1,8 Apron conveyors 1 1,25 1,4 Screw conveyors 1 1,25 1,4 Steel belt conveyors 1 1,25 1,4 Redler conveyors 1 1,25 1,4 Blowers, ventilators Rotary piston blowers 1 1,25 1,4 Blowers (axial and radial) 0,9 1 1,25 Cooling tower ventilators Induced draught fans 1 1,25 1,4 Turbo-blowers 0,9 1 1,25 Generators, converters Frequency converters Generators 0,9 1 1,25 Welding generators 2 Rubber and plastic machinery Extruders 1,6 Calenders 1,6 Kneading machines 1,8 Mixers 1,6 Rolling plant 1,8 Wood processing machines Debarking drums 1,4 1,6 1,8 Planers 1 1,25 1,4 Frame saws 1 1,25 1,4 Foundry plant Blast furnace blowers 1,4 Converters 2 Inclined blast furnace elevators 1,8 Slag crushers 1,8 f 1 Operating time Machine per day (hours) Cranes Luffing gear 0,9 1 1,25 Traversing gear 1,25 1,4 1,6 Hoists 1 1,25 1,4 Slewing gear 1 1,25 1,4 Winches 0,9 1 1,25 Metal working Press brakes 1,6 Sheet straighteners 1,8 Hammers 1,8 Shears 1,6 Forging presses 1,8 Stamping machines 1,8 Mills Hammer mills 2 Ball mills 2 Suspended roller mills 2 Impact mills 2 Rod mills 2 Roller mills 2 Food machinery Fillers 0,9 1 1,25 Kneading machines 1 1,25 1,4 Packaging machines 0,9 1 1,25 Sugar cane crushers 1,6 Sugar cane cutters 1,6 Sugar cane mills 1,8 Sugar beet cutters 1,6 Sugar beet washing plant 1,6

6 Machine Paper machines f 1 Operating time per day (hours) Couch presses 1,8 M. G. cylinders 2 Beating engines 1,6 Pulp grinders 1,8 Calenders 1,6 Wet presses 1,8 Opening machines 1,8 Agitators 1,8 Suction presses 1,6 Suction couch rolls 1,8 Drying cylinders 2 Presses Folding presses 1,4 1,6 1,8 Briquetting presses 1,6 1,8 2 Eccentric presses 1,4 1,6 1,8 Forging presses 1,4 1,6 1,8 Brick moulding presses 1,6 1,8 2 Pumps Centrifugal pumps (thin liquid) 0,9 1 1,25 Centrifugal pumps (viscous liquid) 1 1,25 1,4 Reciprocating pumps (U 1:100) 1,4 1,6 1,8 Reciprocating pumps (U 2: ) 1 1,25 1,4 Plunger pumps 2 Sludgers 1 1,25 1,4 ELMO-Vacuum pump 1,5 Textile machines Winders 1 1,25 1,4 Printing and dying machines 1 1,25 1,4 Tanning vats 1 1,25 1,4 Calenders 1 1,25 1,4 Opening machines 1 1,25 1,4 Machine 6 f 1 Operating time per day (hours) Weaving looms 1 1,25 1,4 Compressors Reciprocating compress. (U 1:100) 1,6 1,8 2 Reciprocating compressors (U 1: ) 1,25 1,4 1,6 Turbo compressors 1,25 1,4 1,6 Rolling mills Sheet metal shears 1,8 Sheet turning machines 1,6 Ingot slab mills 2 Block conveyors 1,8 Block pushers 2 Tape and wire reels 1,4 Descalers 1,6 Sheet mills 1,8 Plate mills 2 Cold rolling mills 2 Track-type tractors 1,6 Billet shears 1,8 Cooling beds 1,4 Transfer skids 1,4 Roller tables (light) 1,4 Roller tables (heavy) 1,8 Roller levellers 1,6 Trimming shears 1,4 End shears 1,8 Loop lifters 1,4 Roller control gear 1,4 The listed service factors f 1 are average values and may be modified in accordance with the actual operating conditions. Machine f 2 Electric motors 1 Steam turbines I.c. engines with more than 2 cylinders 1,1 Water turbines I.c. engines with 1 or 2 cylinders 1,25 Starts per hour Service factor f 1 0,9-1 1,2-1,6 1, ,2 1,12 1, ,3 1,2 1,12 >60 1,5 1,3 1,2 f 3

7 Example of selection Gear box for reciprocating compressor Drive: Electric motor P = 800 kw; n 1 = 1500 min -1 Reciprocating compressor: P e = 720 kw; n 2 = 300 min -1 Coefficient of cyclic variation U 1:100 Operating time 24 hours per day Starts per hour: 3 Rel. operating time ED = 100% Ambient temperature t = 30 C Spur gear unit P N P e f 1 f 2 f 3 P e P G(1, 2, 3, 4) f w Determination of type in accordance with speed reduction: i N = i N = = 5 Result: NH I Determination of size: P N P e f 1 f 2 f 3 Result: NH I for P N = 1700 kw P N = 1440 kw Control of the max. thermal capacity: P G1 f w 550 0,88 = 484 kw P e > P G1 f w Result: Additional cooling required P G2 f w 960 0,9 = 864 kw P e P G2 f w In this example fan cooling is adequate Result: NH I 400 with fan cooling Symbols i N rated speed n 1 driving speed of motor (engine ) or turbine (min -1 ) n 2 driving speed of machine (min -1 ) P N rating of gear box according to rating table (kw) P e effective output of machine (kw) f 1 service factor of machine as listed in table of service factors f 2 service factor of drive unit as listed in table of service factors f 3 service factor in accordance with start frequency as listed in table of service factors f w thermal factor as listed in thermal capacity table t ambient temperature ( C) E D rel. operating time per hour (%) P G1 max. thermal capacity without additional cooling as listed in thermal capacity table (kw) P G2 max. thermal capacity with fan cooling as listed in thermal capacity table (kw) P G3 max. thermal capacity with built - in cooler as listed in thermal capacity table (kw) P G4 max. thermal capacity with fan and built-in cooler (kw) as listed in thermal capacity table Operating time per hour Without cooling ambient temperature C Thermal Factor fw Fan cooling ambient temperature C Built-in cooler ambient temperature C % ,12 1 0,88 0,75 0,63 1,12 1 0,9 0,8 0,7 1,12 1 0,9 0,8 0,7 80 1,35 1,2 1,06 0,9 0,76 1,35 1,2 1,08 0,96 0,84 1,35 1,2 1,08 0,96 0, ,6 1,4 1,25 1,06 0,9 1,6 1,4 1,25 1,12 0,98 1,6 1,4 1,25 1,12 0, ,8 1,6 1,4 1,2 1 1,8 1,6 1,44 1,28 1,12 1,8 1,6 1,44 1,28 1, ,8 1,6 1,35 1,12 2 1,8 1,6 1,44 1,26 2 1,8 1,6 1,44 1,2 7

8 Gear boxes NH I Table of Ratings Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) 1,12 1,25 1,4 1,6 1,8 2* 2,24 2,5 2,8*

9 Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) , ,55* * , ,5* * , , ,6* ,3 11, ,5 8, , , ,5 7 9, Forced oil lubrication essential * Recommended ratios Permissible ratio variation approximately ±3% Intermediate ratios available 9

10 Gear boxes NH I Maximum Thermal Capacity i N n 1 (rpm) 3.15 > > > >3.15 Size of gear box Maximum thermal capacity P G1 (kw) for gearboxes without cooling Maximum thermal capacity P G2 (kw) for gearboxes with fan cooling Maximum thermal capacity P G3 (kw) for gearboxes with built-in cooling Maximum thermal capacity P G4 (kw) for gearboxes with fan cooling and built-in cooling

11 NH I Series Dimension table Right-handed type Aeration Oil dipstick from size 180 Left-handed type Oil-level gauge Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Oil drain Fan Series Housing Shafts Screws NH I i < 3.15:1 i = 3.15:1-4.5:1 i > 4.5:1 Size A B C G H h K M c D 2 I 2 D 3 E V F N a b s Quantity , , Weight (kg) Quantity of oil (litres)

12 Gear boxes NH II, NHS II, NHZ II Table of Ratings Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) , ,1* , , , * , , ,0 15, ,0 11,5 16, , ,5* ,0 13, ,0 10, * , , , * , , , * ,0 9, , , * ,0 8 11, ,0 6 8,5 12, , , ,0 6, ,0 5 7, Forced oil lubrication essential * Recommended ratios Permissible ratio variation approximately ±3% Intermediate ratios available 12

13 Gear boxes NH II, NHS II, NHZ II Maximum Thermal Capacity i N n 1 (rpm) 12.5 > > >22.4 Size of gear box Maximum thermal capacity P G1 (kw) for gearboxes without cooling Maximum thermal capacity P G2 (kw) for gearboxes with fan cooling ) ) ) 1) ) ) ) 1) Maximum thermal capacity P G3 (kw) for gearboxes with built-in cooling ) ) ) 1) Maximum thermal capacity P G4 (kw) for gearboxes with fan cooling and built-in cooling ) ) ) 1) 1) Maximum thermal capacity on request 13

14 NH II Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type Oil-level gauge Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Oil drain Fan Series Housing Shafts Screws NH II i < 12.5:1 i = 12.5:1-20:1 i > 20:1 Size A B C G H h K M c D 2 I 2 D 3 E V F N a b s Quantity , , , , Weight (kg) Quantity of oil (litres)

15 NHS II Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type Shrink disc 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Oil-level gauge Fan Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Oil drain Series Housing Shafts Screws NHS II i < 12.5:1 i = 12.5:1-20:1 i > 20:1 Size A B C G H h K M c E 1 D 3 E V F N a b s Quantity , , , , , , , , Weight (kg) Quantity of oil (litres)

16 NHZ II Series Dimension table Right-handed type Oil dipstick Left-handed type Aeration Shrink disc 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Fan Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Oil drain Series Housing Shafts NHZ II i < 12.5:1 i = 12.5:1-20:1 i > 20:1 Size A B C H h P R T U E 1 D 3 E V , , , , , , Weight (kg) Quantity of oil (litres)

17 Gear boxes NH III, NHS III, NHZ III Table of Ratings Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) 22,4 25* 28 31,5 35,5* 40 45* 50* 56* , , , , , , , , , , , ,0 12, , , , , , , , , , , ,0 15, ,0 10, ,0 7,8 11, ,0 13, , ,4 6,

18 Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) , * ,0 8 11, ,0 6 8, ,0 10, , ,5 5,3 7, ,8 9, * ,5 6, ,40 4, ,7 8,5 12, * ,1 5,7 8, ,30 4,3 6, ,0 7,5 10, * , ,50 3,8 5,3 7, ,4 6,6 9,5 13, * ,90 4,4 6, , ,70 3,3 4, Forced oil lubrication essential * Recommended ratios Permissible ratio variation approximately ±3% Intermediate ratios available 18

19 Gear boxes NH III, NHS III, NHZ III Maximum Thermal Capacity i N n 1 (rpm) Size of gear box Maximum thermal capacity P G1 (kw) for gearboxes without cooling Maximum thermal capacity P G2 (kw) for gearboxes with fan cooling ) 1) ) 1) ) 1) ) 1) ) 1) ) 1) Maximum thermal capacity P G3 (kw) for gearboxes with built-in cooling ) 1) ) 1) ) 1) Maximum thermal capacity P G4 (kw) for gearboxes with fan cooling and built-in cooling ) 1) ) 1) ) 1) 1) Maximum thermal capacity on request 19

20 NH III Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type Oil-level gauge Oil drain Fan Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Series Housing Shafts Screws NH III i < 50:1 i = 50:1-80:1 i > 80:1 Size A B C G H h K M c D 2 I 2 D 3 E V F N a b s Quantity Weight (kg) Quantity of oil (litres)

21 NHS III Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type Shrink disc 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Oil-level gauge Oil drain Fan Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Series Housing Shafts Screws NHS III i < 50:1 i = 50:1-80:1 i > 80:1 Size A B C G H h K M c E 1 D 3 E V F N a b s Quantity Weight (kg) Quantity of oil (litres)

22 NHZ III Series Dimension table Right-handed type Oil dipstick from size 225 Aeration Left-handed type Shrink disc 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Oil drain Fan Series Housing Shafts NHZ III i < 50:1 i = 50:1-80:1 i > 80:1 Size A B C H h P R T U E 1 D 3 E V , Weight (kg) Quantity of oil (litres)

23 Gear boxes NH IV, NHS IV, NHZ IV Table of Ratings Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) * * 180* 200* 224* 250* 280* 315* 355* , , , , , , , , , , ,25 9, ,68 7 9, , ,56 8, ,17 6, , ,00 7, ,75 5,8 7, , ,47 7 9, , , , ,00 6 8, ,00 4,5 6,2 8, , ,57 5,4 7, ,67 4 5,5 7,5 8,6 12 8, ,76 7,2 9, ,17 4,8 6,4 8, ,38 3,6 4,8 6,5 7,5 11 7, ,23 6,5 8, ,82 4,4 5,8 8 9,2 12 9, ,12 3,3 4,4 6 6,9 8,8 6,

24 Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) 400* 450* 500* 560* ,75 5,8 7,8 10, ,50 3,8 5,2 7,1 8,1 10 8, ,88 2,9 3,9 5,3 6,1 7,8 6, , , , ,22 3,5 4,7 6,4 7,4 9,3 7, ,66 2,5 3,5 4,8 5,6 7 5, ,00 4,5 6,3 8,5 9, ,00 3 4,2 5,6 6,6 8,3 6, ,50 2,3 3,1 4,3 4,9 6,3 4,9 9, , ,68 3,9 5,3 7,5 8,6 11 8, ,78 2,6 3,6 5 5,8 7 5, ,34 2 2,7 3,8 4,4 5,5 4,4 7,8 9, ,38 3,4 4,7 6,5 7,5 9,2 7, ,59 2,2 3,1 4,4 5,0 6,2 5,0 8, ,19 1,7 2,3 3,3 3,9 4,6 3,9 6,5 7,7 9, * Recommended ratios Permissible ratio variation approximately ±3% Intermediate ratios available Gear boxes NH IV, NHS IV, NHZ IV Maximum Thermal Capacity n Size of gear box i 1 N (rpm) Maximum thermal capacity P G1 (kw) for gearboxes without cooling

25 NH IV Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type Oil-level gauge Oil drain Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Series Housing Shafts Screws NH IV i = 112:1-250:1 i > 250:1-630:1 Size A B C G H h h 1 K M c D 2 I 2 E F N a b s Quantity Weight (kg) Quantity of oil (litres)

26 NHS IV Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type Oil-level gauge Shrink disc 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Oil drain Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Series Housing Shafts Screws NHS IV i = 112:1-250:1 i > 250:1-630:1 Size A B C G H h h 1 K M c E 1 E F N a b s Quantity Weight (kg) Quantity of oil (litres)

27 NHZ IV Series Dimension table Right-handed type Oil dipstick Aeration Left-handed type Shrink disc 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Oil drain Series Housing Shafts NHZ IV i = 112:1-250:1 i > 250:1-630:1 Size A B C G H h h 1 K M c E 1 E Weight (kg) Quantity of oil (litres)

28 Gear boxes NHK II, NHKS II, NHKZ II Table of Ratings Nominal Ratio Rated speeds (rpm) Size of gear box T i N n 1 n 2 Rated capacity P N (kw) , ,1* * , * , ,0 11,5 16, ,2* ,0 12, , , , , * , , ,0 7, , ,0 8,5 12, ,0 6, , * ,0 6,3 8,5 10, ,0 4,8 6, Forced oil lubrication essential * Recommended ratios Permissible ratio variation approximately ±3% Intermediate ratios available 28

29 Gear boxes NHK II, NHKS II, NHKZ II Maximum Thermal Capacity i N n 1 (rpm) < < Size of gear box T Maximum thermal capacity P G1 (kw) for gearboxes without cooling Maximum thermal capacity P G2 (kw) for gearboxes with fan cooling Maximum thermal capacity P G3 (kw) for gearboxes with built-in cooling Maximum thermal capacity P G4 (kw) for gearboxes with fan cooling and built-in cooling

30 NHK II Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type Oil-level gauge Oil drain Fan Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Series Housing Shafts Screws NHK II i < 11.2:1 i = 11.2:1-18:1 Size A B G H h K M c D 2 I 2 D 3 E V F N a b s Quantity , , , , Weight (kg) Quantity of oil (litres)

31 NHKS II Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Fan Oil-level gauge Oil drain Shrink disc Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Series Housing Shafts Screws NHKS II i < 11.2:1 i = 11.2:1-18:1 Size A B G H h K M c E 1 D 3 E V F N a b s Quantity , , , , Weight (kg) Quantity of oil (litres)

32 NHKZ II Series Dimension table Right-handed type Oil dipstick Aeration Left-handed type 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Fan Oil drain Shrink disc Series Housing Shafts NHKZ II i < 11.2:1 i = 11.2:1-18:1 Size A B H h P R T U E 1 D 3 E V , , , , , , Weight (kg) Quantity of oil (litres)

33 Gear boxes NHK III, NHKSIII, NHKZIII Table of Ratings Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) , , , * , , , * , , , * , , , ,4* , , , * , , , , ,0 13, , ,5* , ,0 12, , ,5* , , , * , , , , , ,

34 Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) ,0 15, * ,0 10, ,0 7,8 11, ,0 13, , ,4 6, , * ,0 8 11, ,0 6 8, ,0 10, , ,5 5,3 7, ,8 9, * ,5 6, ,40 4, ,7 8,5 12, * ,1 5,7 8, ,30 4,3 6, ,0 7,5 10, * , ,50 3,8 5,3 7, ,4 6,6 9,5 13, * ,90 4,4 6, ,70 3,3 4, , Forced oil lubrication essential * Recommended ratios Permissible ratio variation approximately ±3% Intermediate ratios available 34

35 Gear boxes NHK III, NHKSIII, NHKZ III Maximum Thermal Capacity i N n 1 (rpm) Size of gear box Maximum thermal capacity P G1 (kw) for gearboxes without cooling Maximum thermal capacity P G2 (kw) for gearboxes with fan cooling ) 1) ) 1) ) 1) ) 1) ) 1) ) 1) Maximum thermal capacity P G3 (kw) for gearboxes with built-in cooling ) 1) ) 1) ) 1) Maximum thermal capacity P G4 (kw) for gearboxes with fan cooling and built-in cooling ) 1) ) 1) ) 1) 1) Maximum thermal capacity on request 35

36 NHK III Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type Oil-level gauge Oil drain Fan Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Series Housing Shafts Screws NHK III i < 50:1 i = 50:1-112:1 Size A B G H h K M c D 2 I 2 D 3 E V F N a b s Quantity Weight (kg) Quantity of oil (litres)

37 NHKS III Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Fan Oil-level gauge Oil drain Shrink disc Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Series Housing Shafts Screws NHKS III i < 50:1 i = 50:1-112:1 Size A B G H h K M c E 1 D 3 E V F N a b s Quantity Weight (kg) Quantity of oil (litres)

38 NHKZ III Series Dimension table Right-handed type Oil dipstick Aeration Left-handed type 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Fan Oil drain Shrink disc Series Housing Shafts NHKZ III i < 50:1 i = 50:1-112:1 Size A B H h P R T U E 1 D 3 E V Weight (kg) Quantity of oil (litres)

39 Gear boxes NHK IV, NHKS IV Table of Ratings Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) , , , , , , , * , ,00 9, , * , , , ,25 9, ,68 7 9, , * ,56 8, ,17 6, , * ,00 7, ,75 5,8 7, , * ,47 7 9, ,35 5 7,0 9, , ,00 6 8, ,00 4,5 6,2 8, , * ,57 5,4 7, ,67 4 5,5 7,5 9, ,76 7,2 9, ,17 4,8 6,4 8, ,38 3,6 4,8 6,5 7,

40 Nominal Ratio Rated speeds (rpm) Size of gear box i N n 1 n 2 Rated capacity P N (kw) ,23 6,5 8, * ,82 4,4 5,8 8, ,12 3,3 4,4 6,0 7,2 8, ,75 5,8 7, ,50 3,8 5,2 7, ,88 2,9 3,9 5,3 6,4 7,8 9, , , * ,22 3,5 4,7 6,4 7, ,66 2,5 3,5 4,8 5,8 7,0 8, ,00 4,5 6,3 8, * ,00 3,0 4,2 5,6 6,9 8, ,50 2,3 3,1 4,3 5,1 6,3 7, ,68 3,9 5,3 7,5 9,0 11, ,78 2,6 3,6 5,0 6,1 7,0 8, ,34 2 2,7 3,8 4,6 5,5 6, ,38 3,4 4,7 6,5 7,8 9, ,59 2,2 3,1 4,4 5,3 6,2 7,4 8, ,19 1,7 2,3 3,3 4,0 4,6 5,5 6,5 7, * Recommended ratios Permissible ratio variation approximately ±3% Intermediate ratios available Gear boxes NHK IV, NHKS IV Maximum Thermal Capacity i N n 1 (rpm) Size of gear box Maximum thermal capacity P G1 (kw) for gearboxes without cooling

41 NHK IV Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type Oil-level gauge Oil drain Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Series Housing Shafts Screws NHK IV i = 100:1-250:1 i > 250:1-600:1 Size A B G H h h 1 K M c D 2 I 2 E F N a b s Quantity Weight (kg) Quantity of oil (litres)

42 NHKS IV Series Dimension table Right-handed type Aeration Oil dipstick from size 225 Left-handed type 1. For detailed hollow shaft interface dimensions see page Feather keys are used for sizes up to Shrink discs are used from size 200 Oil-level gauge Oil drain Shrink disc Larger gearboxes on request Shaft ends up to 50 mm dia. to ISO k6, above 50 mm dia. to m6 Shaft ends with feather keys to DIN-6885 sheet 1 form A Dimensions subject to modification Series Housing Shafts Screws NHKS IV i = 100:1-250:1 i > 250:1-600:1 Size A B G H h h 1 K M c E 1 E F N a b s Quantity Weight (kg) Quantity of oil (litres)

43 NH Series Hollow shaft design With feather key: With Shrink Disc: * Space for shrink disc screw tightening to be considered Groove acc. to DIN 6885, sheet 1 H = Draw Screws Groove acc. to DIN 6885, sheet 1 Gearbox Hollow shaft design with feather key Shaft centring acc. to DIN 332, form D, with thread Shaft centring acc. to DIN 332, form D, with thread Up to Ø140 h6 From Ø160 g6 Size L 1 E 1 A 1 B 1 C 1 D m min U d d 2 d w ,5 3 2, ,5 3 2, ,5 4 2, ,5 4 2, , ,5 5 3 Gearbox Hollow shaft design with shrink disc Shrink disc Screws Weight (kg) Size L 1 E 1 A 1 B 1 C 1 D m min U d d 2 d w a R Type D G Mt kn H Ma Nm ,6 M M M M M M M M M M M M M

44 NH Series Hollow shaft design Hollow shaft with shrink disc: 2 holes Safety ring Gearboxes middle Screws Min. space "x" for torque wrench has to be considered Gearbox Hollow shaft design with shrink disc Shrink disc Screws Size J 1 M M 1 b b 2 b 0 b 1 e D f d w d 3 m a d 5 c 1 c 2 d 1 Type D S H S 1 M a (Nm) , M M M M M M , M M M M M M

45 Series Built-in cooler connection dimensions NH I NH/NHS II, NH/NHS III, NH/NHS IV NHK/NHKS II, NHK/NHKS III, NHK/NHKS IV Connecting sleeve DIN 2986 Series NH I NH / NHS NHK / NHKS II, III, IV Dimensions Gearbox size d R 1/2" R 3/4" h f m d R 1/2" R 3/4" h f m

46 Series Installation examples NHZ III with Lantern, Coupling and Motor NHKS II with Console, Coupling and Motor NHKZ III with Lantern, Coupling and Motor Available as complete units if required 46

47 Range of products Apart from the standard series of gearboxes described in this catalogue, Gamesa Gearbox manufactures a wide variety of gearbox types which cover almost every application. Below are examples of some of the types from our wide range of products. Single and multi-stage spur gearboxes with helical gearing systems Beyond the standard gear programme exists a wide range of gearboxes with helical, double helical or herringbone tooth systems, with self-hardening, nitrided or case-hardened gears, up to 150 tonnes unit weight. Coaxial spur gearboxes with helical gearing systems For very high transmission torques and compact design for mill drives in the cement industry, steel rolling mills, etc., up to 150 tonnes unit weight. Multi-engine spur gearboxes with helical gearing systems For very high transmission torques, for example double and multiple gearboxes, for tubular mill drives, converters, etc., up to 150 tonnes unit weight. Rubber and plastic mixer gearboxes Transmission torques up to 1,000 knm for calender roll, roller mill and extrusion equipment drives, etc. Rolling mill gearboxes With or without incorporated pinion stands up to 1,000 knm. Marine gearboxes Single and multi-stage, with or without multiple disk clutches, hydraulic couplings with electromagnetic slide etc., and power outputs up to 40,000 HP. Special executions for reverse gears. Bevel gearboxes with helical gearing system With Klingelnberg or Gleason gearing systems, with or without built in thrust bearing (up to 80 tonne axial load), horizontal or vertical output shafts for the widest possible range of installation conditions: vertical mills, pumps, agitators, etc. Shaft mounted gearboxes (hollow input shaft) For paper machinery drives, roller bed drives, elevating installations, etc., for torques up to approximately 150 knm. Vertical spur gearboxes with helical gearing system Free standing type, up to approx. 3,500 kw drive power, for ventilators, pumps, agitating mechanisms, etc. Turbo gearboxes With journal bearings and exchangeable bearing shells, for high speeds, horizontal or vertical type, with circumferential speeds of more than 100 m/sec., for turbines, compressors, pumps, etc. Speed changing gearboxes Shiftable at standstill and under load, with and without remote-control in a wide range of types. Coaxial spur gearboxes Two or three stages available in different configurations. Engine flange gearboxes With spur and helicoidal gears, of two or three stages and horizontal or vertical installation. Curved tooth couplings The curved-tooth coupling is particularly suitable for linking the drive unit, the gearbox and the driven machine. This Gamesa Gearbox invention has proved its worth for several decades, particularly in applications in which shaft displacements are likely or unavoidable. Its flexibility in all directions protects the shaft bearings on either side against axial and radial forces. As a result, the safety and life of the entire drive system are increased. Curved tooth couplings are made for shafts with diameters ranging from 12 to 1200 mm. 47

48 Iron and steel Gearbox standard series Hydro Cement Chemical Paper Siemens VAI MT DMS Fivesgroup Andritz Sundwig Arcelor Mittal Group Global Steel Celsa Group Gerdau Group SMS Group Danieli Alstom Hydro Andritz Hydro Acciona Agua Global Hydro Voith Hydro Iginsa Italcementi Group F.L.Smidth Cemex Group Lafarge Group Portland Dow Chemical Repsol Petronor Papresa Voith Saica clients countries continents 48

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