Epicyclic Gear Unit.K) also available with integrated low speed coupling. minimizing customer interfaces. . Gearbox is furnished with an integrated high speed coupling and coupling guard and requires no high speed shaft bearings.. 2 Epicyclic Gear Unit (with integrated coupling) Parallel Shaft Gear (incl. eliminating bearing losses and substantially reducing oil requirements. Sun gear is lubricated from inside. cost effective systems. Patented Combi design (RTP.. Superior noise and vibration characteristics.. longer than any other gear manufacturer. coupling) Fig.Epicyclic Gear Units Often the Best Solution BHS has been producing Epicyclic Gear Units using the Stoeckicht design since 1932. Coupling available as a BHS TWINTORS® Diaphragm Coupling or a Gear Coupling. Please ask for our E-PACK® brochure! For many applications. 1: Size comparison between a BHS Epicyclic Gear Unit (Type RTP 40) to that of a Parallel Shaft Gear Unit (Type FD 3). with base frame and torquemeter shaft. Fig. (Page 9).K. 1). 2: BHS Epicyclic Gear Unit. Type RTP. E-PACK® Systems feature Epicyclic Gearboxes integrated with electric motors or generators into compact. For many applications BHS Stoeckicht Epicyclic Gear Units have features which make them superior to other gear designs: Optimum utilization of space and minimum weight due to effective load distribution (Fig. with identical input and output speeds. resulting in effective heat dissipation with minimal lubrication. No bearings are required for the high speed shaft. BHS Epicyclic Gear Units are the ideal solution with regard to gearbox performance and cost effectiveness. The radially elastic design of the annulus compensates for manufacturing tolerances.8 to 12. 4. Identical direction of rotation of input and output shafts. Opposite direction of rotation of input and output shafts. Type RT . 4: BHS works premises.. Sun wheel connected to the high speed shaft. Sun wheel connected to the high speed shaft. and RT. BHS Stoeckicht Epicyclic Gear Units are particularly effective at balancing the torque equally between the planets. Fig. Annulus connected to the low speed shaft. Type RT . 3: Differences between two basic designs: Type RH.. Annulus connected to the gearcase (stationary). combined with low strain on the components. * In case of double helical gears. 3 .. Torque Distribution in Epicyclic Gear Units The most significant advantage of Epicyclic Gears is that the input torque is distributed to all of the planets... Gear ratio of one stage ranging from 1.) Type RH . Planet carrier Annulus Planet wheel Sun wheel Fixed member connected with gearcase Fig. Planet carrier connected to the gearcase (stationary). (The red vectors show the circumferential velocity of the respective component..8 to 11.. 1/5.Designs and Principles Type RH . 1/6 of the respective torque. Depending on the gear ratio 3. Principle of Stoeckicht Load Equalization Free radial and axial* mobility of sun wheel and annulus results in best load equalization at the tooth contact points..... The radial forces of each gear mesh offset each other. So with BHS Epicyclic Gear Units a compact design is achieved. Each gear mesh then transmits only 1/3.. Planet carrier connected to the low speed shaft. Gear ratio of one stage ranging from 2. 1/4. 5 or 6 planet wheels may be installed (in special designs up to 7). The design standardization and the machining processes especially developed for double helical Stoeckicht Epicyclic Gear Units allow: Optimum utilization of available space by shaping of the teeth. Short delivery times due to "finish shaving" with subsequent nitriding of planet and sun wheel. BHS Epicyclic Gears are thus especially suitable for high powers and speeds. (Page 10 . depending on type and operating speeds. DIN. BHS Stoeckicht Epicyclic Gear Units ensure: Optimum load distribution to all gear components. Applications up to 50 MW available. 4 Fig 5: Epicyclic Gear Unit. AGMA and ISO. which allows minimization of the gap. Rating and dimensional tables. pumps. Rating possible according to API. High bonding quality of the babbit metal due to in-house manufacturing of the planet spindle sliding surfaces by the metal spraying method. All the geared components adjust themselves freely in radial and axial direction until their position is determined by an equilibrium of forces with all the other components. (option) Smooth running and long service life due to fluid-film bearings. The rights to the Stoeckicht patent were acquired by BHS in 1970. Type RTP. . Minimum influence of additional dynamic forces. industrial blowers. Type RHP. High wear resistance of the gear teeth of the sun wheel and planets since the tooth flanks are not machined after nitriding. compressors. 6: Epicyclic Gear Unit. Fig.Designs Stoeckicht Epicyclic Gear Types RHP and RTP BHS has built well over 10. High surface quality of annulus gearing possible with shaving of the internal gearing.000 Epicyclic Gear Units according to the Stoeckicht design. Low influence of manufacturing tolerances.11) BHS Epicyclic Gear Units drive machinery including generators. and marine propellers. CS.Designs Compact Epicyclic Gear Type RTG For applications where small and medium powers must be transmitted.. type RTG. Fig. High bonding quality of the babbit metal due to in-house manufacturing of the planet spindle sliding surfaces by the metal spraying method.. 8). Rating and dimensional tables.CS (Fig. A straight forward design with an attractive price-performance relationship with short delivery times. Fig. Type RTG. Type RTG. the well proven BHS compact Epicyclic Gear Unit is an economic alternative. in free-standing as well as flangemounted designs. (Page 10 . . High axial forces may be transmitted when RTG Units are equipped with thrust collars. 5 Fig. When equipped with a second set of planets. 7: BHS Integral Epicyclic Gear Unit.11) Compact BHS Epicyclic Gear Units are used as Integral Gear Units in stationary and mobile generator or compressor plants. This is called a Stage-Type Epicyclic Gear Unit. 9: BHS set of gears for a RTG Epicyclic Gear Unit. 8: BHS Stage-Type Epicyclic Gear Unit. extreme gear ratios up to 25 may be achieved... By the patented „Double-Twin“ arrangement of the planet wheels a gear ratio up to 18 may be achieved in one stage. Quiet running due to planet wheels and gearing corrections. Epicyclic Stage Parallel Shaft Stage V H RTP.Gear Configurations for any Application High Speed Side Possible Configurations RHG RHP Coupling In the basic version we supply the high speed coupling as an integral component of the gear unit. H The integration with an electric machine at the low speed side is particularly cost effective. Integration of Impellers External Stage The BHS basic gear unit may be combined with external stages at the high speed side. V H Gear Coupling BHS-Cincinnati TWINTORS® Diaphragm Coupling Bearing BHS Epicyclic Gear Units incorporate a bearing on the highspeed shaft in order to support e. impellers or heavy couplings. If high radial and/or axial forces must be absorbed at the low speed side.g. 6 H Bevel Gear Stage Installations V H vertical horizontal Possible combinations RTG RTP . and/or high gear ratio requirements. then appropriate bearings will be installed. The low speed shaft is supported in bearings. water power plants and pump drives. Typical applications include marine propulsions. Fields of application are plants with high power. RTG FD The connection with a bevel gear stage at the high speed side is used for Vertical Roller Mill Drives. The integration of the low speed coupling results in especially compact installations. Epicyclic Gear Basic versions Low Speed Side Possible Configurations RHG RHP RHP RTG RTP Bearing V H Standard V H RTP E-Pack V H Motors. Generators with flange-mounted gear unit H RHG Coupling integrated H V V H Combi-design without shaft journal (RTP..K) RTG Bearing V H Axial thrust bearing V H Fig: 10 7 .. 12: BHS Vertical Epicyclic Gear Unit. Also available with rolling bearings for specific applications. epicyclic or parallel shaft gear). Smooth running due to fluidfilm bearings and gearing corrections. particularly for high torque applications. Fig. Fig. 70 years of experience in the manufacturing of Large-Scale Epicyclic Gear Units ensure: Straight forward design with simple assembly and maintenance.Designs Large-Scale Epicyclic Gear Type RHG BHS Large-Scale Epicyclic Gear Units are significantly more compact than parallel shaft designs. with thrust bearing. pump stations. Type RHG. and steel mill plants.11) Typical applications for RHG Units include water power plants. (Page 6 . A variety of design configurations are available. Rating and dimensional tables. 8 .: 11: BHS Epicyclic Gear Unit. marine propulsions. 13: BHS-Cincinnati Epicyclic Gear Unit for a water power plant. for pump and mill drives. Fig.7) RHG Units may be integrated with other gearing stages (bevel. High bonding quality of the babbit metal due to in-house manufacturing of the planet spindle sliding surfaces by the metal spraying method. (Page 10 . for a megayacht. for a blower drive. 15: BHS Epicyclic Gear Unit.Application Examples Fig. 14: BHS Epicyclic Gear Unit. Type RTG. Type RTP. for a steam turbine. 18: BHS Epicyclic Gear Unit. between electric motor and compressor. Fig. 9 . driven by a steam turbine. Type RHP. 17: BHS Epicyclic Marine Reversing Gear Unit. Fig. Fig. 16: BHS Epicyclic Gear Unit. in a compressor plant. 19: BHS E-PACK® Epicyclic Gear Unit mounted on the generator. Fig. Fig. Type RHP. 6 0.1 0 0.8 0.4 0.5 32 310 0 72 30 64 1 0.6 0.9 0.4 0.3 0.5 0.3 25 400 0 20 56 10 8 6 5 4 3 20 490 0 0.6 0.4 0.2 400 20 18 16 14 12 250 270 0 300 0 320 0 0 0 1 0.2 22 20 18 16 14 12 440 0 490 0 545 0 0 0 0 0 600 345 670 375 400 750 850 955 0.2 16 600 0 12 0.1 2 750 0 1 955 3 4 5 6 7 8 9 10 11 12 2 3 4 5 0 6 7 8 9 10 11 Ratio i = n1/n2 Diagram 3 Ratio i = n1/n2 Diagram 4 10 .1 3 4 5 6 7 8 9 10 11 12 0 2 3 4 5 6 7 8 9 10 11 Ratio i = n1/n2 Diagram 1 Ratio i = n1/n2 Diagram 2 Type RH 600 500 400 300 Type RTG 20 15 Gear size 180 160 Gear size 56 Maximum permissible speed n2 (rpm) 12 10 50 45 220 0 0 0 140 200 8 125 6 5 Power factor on the low speed shaft = P/n2 [kW/rpm] Power factor on the low speed shaft = P/n2 [kW/rpm] 112 100 80 60 50 40 250 100 4 3 40 280 90 80 2 1.5 0.7 0.8 0.7 0.8 0.5 0.Rating Diagrams Type RH 70 60 50 40 30 20 Type RTP Gear size Maximum permissible speed n2 (rpm) 70 60 50 40 Gear size Maximum permissible speed n2 (rpm) 72 64 56 53 50 45 42 40 36 32 28 25 22 30 20 72 64 56 100 Power factor on the low speed shaft = P/n2 [kW/rpm] Power factor on the low speed shaft = P/n2 [kW/rpm] 10 9 8 7 6 5 4 3 2 0 105 0 115 0 120 0 125 0 140 1500 0 160 0 175 0 0 0 0 10 9 8 7 6 5 4 3 2 53 50 42 40 36 32 28 25 45 180 0 200 0 220 0 240 0 250 0 280 0 300 0 310 0 350 0 0 205 225 1 0.3 0.9 0. 1 1. Driven Machine Driving Machine E-Motor Turbine Piston Engine Turbocompressor Piston compressor 2 cyl. base load and continuous operation Generators. or RTP 45.Calculation Examples Size Selection Rating per DIN 3990.7 2. By means of the Power Factor P/n2 (kW/rpm) and the ratio „ i “ the proper gear size and the admissible speed may be determined from the respective rating diagram.3 1.0 1. For these two sizes.3 1. or deviating rating specifications we recommend that you contact the BHS project department. additional axial and radial loads.1 1.0 1.6 2. ISO 6336 and AGMA 421. peak load operation 1.3 1. n2 max. The correct gear size is determined by the power diagram: Po P f [kW] [kW] Rated power of the gear unit Po x f Application factor depending upon the machines connected (Table 3) [rpm] [rpm] n1 n2 High speed shaft Low speed shaft The typical start-up and short circuit shocks are taken into consideration when designing the BHS-Cincinnati Epicyclic Gear Units. applications outside the specified limits. Pumps Table 3: Application factor „ f “ according to API 613 specification recommended service factors (excerpt). admissible speed n2 (Page 10).06 Given factors: Po = 2400 kW n1 = 16500 rpm n2 = 1500 rpm Driving machine: turbine Driven machine: generator f = 1.3 2.4 2. the max.0 Important: For each gear rating be sure that the operating speed of the determined gear type is below the max.0 1. Generators.7 1. admissible speed for the low speed shaft can be determined from the rating diagram.1 = 2640 kW Power factor: P/n2 = 2640/1500 = 1.1 (from Table 3) Rated power: P = Po x f = 2400 x 1. 11 .76 kW/rpm i = n1/n2 = 16500/1500 = 11 From the power diagram you will obtain a gear size RP 40.7 2. = 1600 rpm (RP) or 3000 rpm (RTP) Operating speed: n2 = 1500 rpm < n2 max. Thus permissible. In case of extreme shock loads. RTP. d2.Main Dimensions High Speed Shaft l3 Epicyclic Gear Unit B A Low Speed Shaft C1 l1 D d d3 d1 H l E min C2 l2 d2 Fig. d1. l1. l3 to be agreed upon with customer. l. 12 . l2. 20 Dimension Table RHP. RTG (Dimensions in mm) Gearsize 12 14 16 18 20 22 25 28 32 36 40 45 50 56 64 72 D A B RTP RHP RTG 50 50 50 50 50 50 50 60 60 60 60 60 70 70 70 70 60 60 60 60 60 80 80 100 100 110 110 125 125 125 125 125 C1 H Emin Table 1 Weight (kg) 230 250 270 380 420 630 670 1000 1100 1750 1900 2900 3900 5500 6700 7500 Dimension Table RHG (Dimensions in mm) Gearsize 56 64 72 80 90 100 112 125 140 160 180 D A B C1 C2 Table 2 Emin 400 400 400 490 490 550 550 670 670 840 840 940 1040 1300 1570 1570 200 200 200 250 250 290 290 370 370 460 460 500 530 600 686 686 220 220 220 240 240 255 255 315 315 340 340 360 370 400 654 654 225 225 225 300 300 315 315 420 420 520 520 585 650 800 975 975 75 75 75 95 95 110 110 140 140 170 170 190 200 225 260 260 1150 1250 1400 1550 1730 1950 2200 2500 2750 3000 3400 575 625 700 775 865 975 1100 1250 1375 1500 1700 70 76 86 94 106 120 134 150 166 180 200 410 445 500 550 620 700 790 890 980 1070 1200 820 890 1000 1100 1200 1400 1560 1780 1960 2100 2400 215 235 260 290 325 365 410 470 515 560 630 Applies to both tables: C1 without axial thrust bearing C2 with axial thrust bearing Dimensions d. d3. de BHS Getriebe Inc.com .bhs-getriebe. phone +1 513 797 .A.0 fax +49 83 21 802 .8100 fax +1 513 797 .689 www.de [email protected] Getriebe GmbH Hausanschrift: Hans-Böckler-Strasse 7 D-87527 Sonthofen Germany Postanschrift: Postfach 1251 D-87516 Sonthofen Germany phone +49 83 21 802 . Ohio 45245 U. 4357 Ferguson Drive Suite 280 Cincinnati.8103 www.bhs-gears.S.