SYMBOLS, UNITS AND DEFINITIONS

Transcription

1

2 SYMBOLS, UNITS AND DEFINITIONS Values depending on the APPLICATION term u.m. definition A 2 [N] Thrust force on output shaft R 2 [N] Radial force on output shaft ED [min] Loading time ED% [%] Loading time % L 10h [h] Bearings basic rating life M 1 PEAK [Nm] Maximum input torque (usually motor) M 2(1)... M 2(n) [Nm] Output torque at each of the time periods t 1... t n M 2 EQU [Nm] Equivalent output torque M 2 MAX [Nm] Maximum output torque in case of emergency n 2(1)... n 2(n) [min -1 ] Output speed based on the time periods t 1... t n n 2 EQU [min -1 ] Equivalent output speed n 2 MAX [min -1 ] Maximum output speed n 2 [min -1 ] Output speed T [ C] Ambient temperature t 1... t n [s] Time periods of motion t [s] Cycle duration including pause Z [1/h] Cycle number per hour Values depending on the GEAR DRIVE SELECTION term u.m. definition A n [N] Admissible thrust force A n [N] Thrust force acting simultaneously with the rated radial force R n [N] Admissible radial force at midpoint of output shaft C t Torsional stiffness f n Speed factor f z Cycle factor f T Temperature correction factor i Gearbox ratio J G [kgm²] Mass moment of inertia of the gearhead L Z [mm] Factor for bearing's lifetime calculation M T2 ref [Nm] Reference tilting moment C B [Nm] Costant for bearing's lifetime calculation p Bearing lifetime exponent M n 2 [Nm] Rated output torque M a 2 [Nm] Maximum acceleration output torque M p 2 [Nm] Emergency stop output torque n 1 ref [min -1 ] Reference input speed of the gearhead n 1 max [min -1 ] Maximum momentary input speed. The speed the unit can be driven at occasionally and in non-repetitive conditions. For cycle duty type S5, it cannot be applied continuously for more than 30 seconds η [%] Gear efficiency φ S [arcmin] Standard backlash is calculated in static conditions and with the application of a torque equal to 2% of the gear unit rated torque φ R [arcmin] Reduced backlash is calculated in static conditions and with the application of a torque equal to 2% of the gear unit rated torque

3 SUMMARY Chapter Contents 1 General information Features of KR series Versions Mounting positions Coordinated shaft rotation Selecting the gear unit Ordering code Technical specifications Mass moment of inertia KR 10...KR 40 with standard ball bearings KR 20...KR 40 with taper roller bearings (HDB option) Dimensions...10 KR KR KR KR Gearbox without motor adapter - FM Machine shaft...19 Revisions Refer to page 20 for the catalogue revision index. Visit to search for catalogues with up-to-date revisions. 1

4 1 GENERAL INFORMATION 1.1 FEATURES OF KR SERIES KR KR KR KR Bevel helical units type KR, manufactured under the most stringent quality specifications, are designed for dynamic and accurate applications where light weight and space effectiveness are a factor. Many options can be selected from the catalogue as far as motor adapters and output shaft configurations that facilitate the installation on the driven equipment. Available in one only backlash option (j S = 8 ) Single reduction: ratios i = 1, 2, 5 Radial ball bearings are of standard supply, while taper roller bearings can be optionally specified for particularly demanding loading conditions Degree of protection IP65 Oil seals from Viton compound as standard Max. noise level L P 70 n 1 = 3000 min -1 Units are factory charged with synthetic lubricant suitable for operation at ambient temperatures in the range 0 40 C. The lubricant quantity is affected by mounting position, that therefore will have to be specified at the time of ordering. In the absence of contamination lubricant does not require periodical changes. The type of lubricant, whether grease or oil, depends on type of duty, as charted below: duty KR KR 40 S1 (continuous) synthetic oil viscosity ISO VG 220 S5 (intermittent) NLGI grease consistency 00 2

5 1.2 VERSIONS Parallel shaft LP LPF LD LDF single extension single extension + flange double extension double extension + flange Hollow shaft H HF S SF keyed (KR 30...KR 40) keyed shaft + flange (KR 30...KR 40) with shrink disc with shrink disc + flange 1.3 MOUNTING POSITIONS U VA 1.4 COORDINATED SHAFT ROTATION 3

6 1.5 SELECTING THE GEAR UNIT M 2(1) Load diagram M 2: Output torque 0 M 2(2) [s] M 2(3) n 2(2) Speed diagram n 2(1) n 2(3) n 2(1) = n 2(3) = 0.5 n 2(2) n 2: Output speed 0 t 1 t 2 t 3 t 4 [s] ED Ratio i n 1 i = 1 n n 2(1) t Equivalent output torque M 2 EQU [Nm] 3 1 M 2(1) n 2(n) t n M 2(n) M 2 EQU = 2.1 n 2(1) n Equivalent output speed n 2 EQU [min -1 ] n 2(1) t 1 + n 2(2) n 2(n) t n 2 EQU = 2.2 t 1 + t t n t 1 t 2 If n 2 EQU i n 1 ref f n = 1 n 2(n) t n Speed factor f n If n 2 EQU i > n 1 ref f n = 3 n 2 EQU n 1 ref i 2.3 Loading time ED% [%] t 1 + t t n ED% = 100 t 3 Loading time ED [min] ED = t 1 + t t n Cycle number Z [1/h] Z = 3600 t 4 Cycle factor f z Temperature factor f T Maximum input torque M 1 PEAK [Nm] Z Z < Z < Z < Z < Z Z > 6000 If T 20 C f T = 1 T 20 C If T > 20 C f T = C f z contact us a) maximum possible application torque b) limited motor torque by inverter c) maximum motor torque

7 Select a smaller ratio Estimate ratio i 1 NO n 2 MAX i n 1 max YES Define M 2 EQU 2.1 Define n 2 EQU 2.2 Select gear unit Select a bigger unit Define f n 2.3 NO M 2 EQU f n M n 2 YES ED% 60% and ED 20 min ED% 60% or ED 20 min 3 4 Z 1000 NO YES S5 cycle duty S1 cycle duty Define f Z 5.1 Define f T 5.2 Select a bigger unit Define M 1 PEAK Define M 1 PEAK 5.3 Select a bigger unit NO M 1 PEAK i M a 2 M 1 PEAK i f Z f T M a 2 NO Select a bigger unit YES YES NO M 2 MAX M p 2 YES Check the external forces on output shaft 5

8 1.6 ORDERING CODE KR 30 1 STD H 60A CD 14 S1 U HEAVY DUTY BEARINGS, HDB (KR 20...KR 40) MOUNTING POSITION U, VA 3 DUTY S1 continuous duty S5 intermittent duty INPUT SHAFT BORE MOTOR COUPLING CD clamping device INPUT SECTION motor adapter FM without motor adapter 18 VERSION Parallel shaft: LP, LPF, LD, LDF Hollow shaft: H (KR 30...KR 40), HF (KR 30...KR 40), S, SF 3 BACKLASH STD (j S = 8 arcmin) GEAR RATIO 1, 2, 5 FRAME SIZE 10, 20, 30, 40 SERIES KR 6

9 2 TECHNICAL SPECIFICATIONS KR 10 M n 2 M a 2 M p 2 n 1 ref n 1 max ϕ S η [Nm] [Nm] [Nm] [min -1 ] [min -1 ] [arcmin] % i = KR 20 M n 2 M a 2 M p 2 n 1 ref n 1 max ϕ S η [Nm] [Nm] [Nm] [min -1 ] [min -1 ] [arcmin] % i = i = i = i = i = KR 30 M n 2 M a 2 M p 2 n 1 ref n 1 max ϕ S η [Nm] [Nm] [Nm] [min -1 ] [min -1 ] [arcmin] % i = KR 40 M n 2 M a 2 M p 2 n 1 ref n 1 max ϕ S η [Nm] [Nm] [Nm] [min -1 ] [min -1 ] [arcmin] % i = i = i = i = i = LP R n 2 R n 3...LD A n 2 A n 3 R n 2 A n 2 A n' 2 R n 3 A n 3 A n' 3 [N] [N] [N] [N] [N] [N] KR KR 20 HDB KR 30 HDB KR 40 HDB

10 3 MASS MOMENT OF INERTIA 3.1 KR 10...KR 40 with standard ball bearings KR 10 KR 20 J G [kgcm 2 ] J G [kgcm 2 ] 6 D D 14 8 D D S, SF S, SF i = 1 LP, LPF i = 1 LP, LPF LD, LDF LD, LDF S, SF S, SF i = 2 LP, LPF i = 2 LP, LPF LD, LDF LD, LDF S, SF S, SF i = 5 LP, LPF i = 5 LP, LPF LD, LDF LD, LDF KR 30 KR 40 J G [kgcm 2 ] J G [kgcm 2 ] 11 D D D D D 24 D = 28 H, HF H, HF i = 1 S, SF LP, LPF i = 1 S, SF LP, LPF LD, LDF LD, LDF H, HF H, HF i = 2 S, SF LP, LPF i = 2 S, SF LP, LPF LD, LDF LD, LDF H, HF H, HF i = 5 S, SF LP, LPF i = 5 S, SF LP, LPF LD, LDF LD, LDF

11 3.2 KR 20...KR 40 with taper roller bearings (HDB option) KR 20 KR 30 J G [kgcm 2 ] J G [kgcm 2 ] HDB 8 D D 14 HDB 11 D D D 24 S, SF H, HF i = 1 LP, LPF LD, LDF i = 1 S, SF LP, LPF LD, LDF S, SF H, HF i = 2 LP, LPF LD, LDF i = 2 S, SF LP, LPF LD, LDF S, SF H, HF i = 5 LP, LPF LD, LDF i = 5 S, SF LP, LPF LD, LDF KR 40 J G [kgcm 2 ] HDB 14 D D 24 D = 28 H, HF i = 1 i = 2 i = 5 S, SF LP, LPF LD, LDF H, HF S, SF LP, LPF LD, LDF H, HF S, SF LP, LPF LD, LDF

12 KR 10 4 DIMENSIONS M4x N5 56 N3 M4x N4 N1 N4 Ø N Ø D 86 N N1 min N1 max N N1 N2 N3 N4 N5 min max 25AH AH AH AH AH AH AH AH AH A M4x B M4x A M4x B M5x BH C M4x MH A M5x A M5x B M5x C M5x A M6x B M5x A M5x A M6x

13 KR 10 KR S KR SF Nm Ø Ø 10 H7 Ø 11 G7 Ø h Ø h M4x10 12 k Ø 45 g6 Ø 45 g Ø Ø 45 g KR LP KR LPF KR LD KR LDF M4x10 12 k

14 KR 20 M5x8 38 N N M5x8 6.5 N4 Ø N Ø D N1 N N N1 N2 N3 N4 N5 40B M4x A M4x B M5x BH C M4x D M6x A M6x A M5x AH B M5x C M5x MH A M6x AH B M5x A M5x AH A M6x A M8x B M8x A M8x B M8x B M8x

15 KR 20 KR S KR SF Nm Ø Ø 15 H7 Ø 16 G7 Ø h Ø h M5x k Ø 60 g6 Ø 60 g Ø Ø 60 g KR LP KR LPF KR LD KR LDF M5x k

16 KR 30 M5x N N M5x8 11 N4 Ø N Ø D N1 N N N1 N2 N3 N4 N5 50D M6x A M6x A M5x AH B M5x A M6x AH B M5x A M6x AH A M8x A M8x B M8x A M8x A M8x B M8x B M8x A M10x A M10x

17 KR 30 KR H KR HF Ø Nm Ø 20 H7 Ø 22 G7 Ø h h G M8x19 22 k Ø 70 g6 Ø 70 g6 Ø 70 g KR S KR SF Ø Ø Ø Ø 70 g KR LP KR LPF KR LD KR LDF M8x19 22 k

18 KR 40 M6x N N3 M6x N4 Ø N Ø D N1 N N N1 N2 N3 N4 N5 55A M6x A M6x A M8x A M8x B M8x A M12x A M10x A M10x A M14x A M14x

19 KR 40 KR H KR HF Ø Nm Ø 30 H7 Ø 32 G7 Ø h h G M12x28 32 k Ø 90 g6 Ø 90 g6 Ø 90 g KR S KR SF Ø Ø Ø Ø 90 g KR LP KR LPF KR LD KR LDF M12x28 32 k

20 4.1 GEARBOX WITHOUT MOTOR ADAPTER - FM L3 L2 L1 D4 30 D1 L5 D2 D F7 D5 L4 D3 30 D1 D2 D3 D4 D5 L1 L2 L3 L4 L5 KR 10 KR 20 KR 30 KR M4x8 M M4x8 M M4x8 M M4x8 M M6x10 M M6x10 M M6x10 M M6x10 M M6x15 M M6x15 M M6x15 M M6x15 M M8x15 M M8x15 M M8x15 M M8x15 M

21 4.2 MACHINE SHAFT Pivot of driven equipment should be made from high grade alloy steel. Table below shows recommended dimensions for the Customer to consider when designing mating shaft. A device retaining the shaft axially is also recommended (not shown). The number and size of relative tapped holes at shaft end depend on application requirements. B B1 B2 R MAX S 15 H A1 A2 A3 A4 D C C D A1 A2 A3 A4 B B1 B2 C D R MAX UNI 6604 S KR h h x6x25 A KR h h x7x35 A 1 B B1 B2 R MAX S 15 S A1 A2 A3 A4 A1 A2 A3 A4 B B1 B2 R MAX S KR h h KR h h KR h h KR h h

22 INDEX OF REVISIONS (R) R2 Description The specifications formerly corresponding to option DH are now integrated as a standard product configuration Chapter 4 Dimensions : - harmonized the code number for some of the input adapters - dropped availability of hollow output shaft, H and HF type, for KR This publication supersedes and replaces any previous edition and revision. We reserve the right to implement modifications without notice. This catalogue cannot be reproduced, even partially, without prior consent. 20 COD. TIR 0051 R2

23

24