AGMA-6034-B92-1992-R-2005.pdf
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1、AGMA 6034-8 m Ob87575 0002768 582 m ANSZIAGMA 6034-B92 (Revision of ANWAGMA 6034-A87) AMERICAN NATIONAL STANDARD Practice for Enclosed Cylindrical Wormgear Speed Reducers and Gearmotors AGMA STANDARD Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=I
2、HS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 09:18:21 MDTNo reproduction or networking permitted without license from IHS -,-,- AGUA 6034-8 m Ob87575 O002767 417 m Practice for Enclosed Cylindrical Wormgear Speed Reducers and Gearmotors AGMA 6034-892 (Revision of 6034-A87) A
3、pproval of an American National Standard requires verification by ANSI that the requirements for due process, consensus, and other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreeme
4、nt has been reached by directly and materially affected interests. Substantial agreement means much more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use of Amer
5、ican National Standards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the standardsor not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standar
6、ds tnstitute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreover, no person shall have the right or authority to issue an interpretation of an American National Standard in the name of the American National Standards Institute. R
7、equests for interpretation of this standard should be addressed to the American Gear Manufacturers Association. CAUTION NOTICE: AGMA Standards are subject to constant improvement, revision, or withdrawal as dictated by experience. Any person who refers to any AGMA Technical Publication should be sur
8、e that the publication is the latest available from the Association on the subject matter. Fables or other self-supporting sections may be quoted or extracted in their entirety. Credit lines should read: Extracted from AGMA 6034-B92, Practice for Enclosed Cylindrical Wormgear Speed Reducers and Gemt
9、ors with the permission of the publisher, the American Gear Manufacturers Association, 1500 King Street, Suite 201, Alexandria, Virginia 223141. Approved February 7, 1992 American National Standards Institute, Inc. ABSTRACT This standard gives a method for rating and design of specific enclosed cyli
10、ndrical wormgear reducers and geamtors at speeds nut greater than 3600 tpm or mesh sliding velocities not more than 6000 ftlmin (30 ds). It contains power, toque and efficiency equations with guidance on component design, thermal capacity, service factor selection, lubrication, and self-locking feat
11、ures of wormgears. Annexes are supplied on service factors and user recommendations. Copyright O 1992 by American Gear Manufacturers Association Published by American Gear Manufacturers Association 1500 King Street, Suite 201, Alexandria, Virginia 22314 ISBN: 1-55589-57 Px is axial pitch in inches (
12、millimeters). -The worm and gear design guidelines specified in AGMA 341 .O2 are followed. These material and proportion design constraints are strictly empirical. 3.2 Discussion of wear rating formula The rating of wormgearing obtained from the following formulas is based on pitting and wear resist
13、ance, not on Hertzian stress considerations, because of the relatively ductile bronze material used for the wormgear and the sliding velocities between the worm threads and the gear teeth. Actually, the performance of wormgearing is more comparable to that of plain bearings than ball or roller beari
14、ngs. In addition to surface contact stress, the temperature of the oil film separating the gear teeth is an important consideration in the load carrying capacity of wormgearing. Ratings provided by this standard take this into account. 3.3 Power formula The input power rating formula includes two ex
15、pressions. The first provides output power at the gear, and the second adds power loss at the tooth mesh. n W t Dm v Wf + i = 126 O00 mG 33000 (4M) where Pi is rated input power in horsepower (kilowatts); n is rotational speed of worm in rpm; Wt is tangential load on wormgear tooth in pounds (Newton
16、s) (see 3.3.1); D , is mean gear diameter in inches (millimeters); mG v is gear ratio, mG= NG INW ; is sliding velocity at mean worm diameter in feet per minute (meters per second) (see 3.3.3); is friction force in pounds (Newtons) (see 3.3.2). 3 . 3 . 1 Tangential load The tangential load on the wo
17、rmgear tooth, wt , is determined by: Wf 08 Wt = C D , Fe Cm C, c , D , F, c , CY 0 . 8 w. = . 75.948 t where Cs is materials factor. See figure 1 or 2; Dm is mean gear diameter in inches (millimeters); 5 is effective face width (actual facewidth, except not to exceed 0.67 dm) of gear in inches (mill
18、imeters); Cm i s ratio correction factor. See table 2; C , is velocity factor. See tables 3 and 4. 3 Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 09:18:21 MDTNo reproduction o
19、r networking permitted without license from IHS -,-,- AGHA b034-B D Ob87575 0002777 595 W ANSUAGMA 6034492 BRONZE GEAR WITH WORM HAVING SURFACE HARDNESS OF 58 Rc MIN 1 O00 900 C Y b 2 9 4 700 w G o ? o 800 5 WHICH THESE FACTORS APPLY USE FIGURE 2 FOR MAXIMUM Cs FACTOR FOR CENTER 600 500 2 . 5 3 4 5
20、6 7 8 910 15 20 25 30 40 50 60 70 80 90 MEAN GEAR DIAMETER, Dm - INCHES I IIii I I I I I I I I I I I I I 60 70 80 90 100 150 200 300 400 500 600 700800 1000 1500 2000 2500 MEAN GEAR DIAMETER, Dm - mm Figure 1 - Materials factor, CS, for center distances 3.0 in (76 mm) BRONZE GEAR WITH WORM HAVING SU
21、RFACE HARDNESS OF 58 Rc MIN 1 O00 8 L 2 9 g . 900 CHECK FIGURE 1 AND s E USE THE LOWER OF k 800 THE TWO VALUES I 1 .o 1 . 5 2.0 2 . 5 3.0 700 0.5 CENTER DISTANCE - INCHES 12 20 30 40 50 60 70 75 CENTER DISTANCE - mm Figure 2 - Maximum materials factor, CS, for center distances ver 6 in. 152mm) ip to
22、 12 in. 305mm) menters )ver 12 in. 305mm) ip to 18 in. 457mm) ;enters her 18 in. 457mm) ip to 24 in. 61 Omm) :enters her 24 in. 61 Omm) :enters Table 8 - AGMA lubricant number recommendations for enclosed cylindrical wormgear drives Worm iot greatei than 700 S P d o 450 300 250 200 AGMA lubricant nu
23、mber for cvlindrical worms Ambient te 15“F(-1 0C) to 50F(1 0C) * 7 comp. 7 comp. 7 comp. 7 comp. 7 comp. perature 50F(1 0C) to 125“F(52“C) 8 comp. 8 comp. 8 grip. 8 comp. 8 comp. Worm speed greater than 700 (rpm) 450 300 250 200 Ambient te l5“F(-1O0C) to * 50F(1 0C) 7 comp. 7 comp. 7 comp. 7 comp. 7
24、 comp. perature 5OoF(1 0C) to 125“F(52“C 8 comp. 7 comp. 7 comp. 7 comp. 7 comp. Pour point of the oil used should be 10F (6OC) less than the minimum ambient temperature expected Wormgears operating at speeds above 2400 rpm or 2000 Wmin (1 O d s ) sliding velocity may require pressurized lubrication
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