1、BSR/CEMA B105.1 Welded Steel Conveyor Pulleys With Compression Type Hubs CEMA Standard B105.1 Specifications for Welded Steel Conveyor Pulleys With Compression Type Hubs Conveyor Equipment Manufacturers Association ANSI / CEMA B105.1-2009 A REVISION OF ANSI/CEMA B105.1-2003 (Approved May 19, 2009) I
2、SBN: 978-1-891171-40-6BSR/CEMA B105.1 Welded Steel Conveyor Pulleys With Compression Type Hubs For Information on Company Membership visit the CEMA Web Site at http:/www.cemanet.org Conveyor Chain CEMA ORGANIZATIONAL CHART Controls Palletizers Meet in March and/or September Conference Strategic Plan
3、ning Insurance Meetings Membership Public Relations Statistics Finance and Budget Past Presidents Bulk Handling Section Committees Unit Handling Section Engineering Conference Conveyor Chain Performance Terminology Unit Handling Standards Idlers Pulleys Belt Systems Screw Conveyors Belt Manual Acces
4、sories Safety Controls Terms and Definitions International Standards Meets Each June Screw Conveyors Bulk Handling Components and Systems General Bulk Handling Section Bulk Accessories Unit Handling Conveying Section COMMITTEES BOARD OF DIRECTORS OFFICERS SAFETY NOTICE The Conveyor Equipment Manufac
5、turers Association has developed Industry Standard Safety Labels for use on the conveying equipment of its member companies. The purpose of the labels is to identify common and uncommon hazards, conditions, and unsafe practices which can injure, or cause the death of, the unwary or inattentive perso
6、n who is working at or around conveying equipment. The labels are available for sale to member companies and non-member companies. A full description of the labels, their purpose, and guidelines on where to place the labels on typical equipment, has been published in CEMAs Safety Label Brochure No.
7、201. The Brochure is available for purchase by members and non-members of the Association. Safety Labels and Safety Label Placement Guidelines, originally published in the Brochure, are also available free on the CEMA Web Site at http:/www.cemanet.org/CEMA_Safety_Pg.htm PLEASE NOTE: Should any of th
8、e safety labels supplied by the equipment manufacturer become unreadable for any reason, the equipment USER is then responsible for replacement and location of these safety labels. Replacement labels and placement guidelines can be obtained by contacting your equipment supplier or CEMA.BSR/CEMA B105
9、.1 Welded Steel Conveyor Pulleys With Compression Type Hubs DISCLAIMER The information provided in this document is advisory only. These recommendations are provided by CEMA in the interest of promoting safety in the work place. These recommendations are general in nature and are not intended as a s
10、ubstitute for a thorough safety program. Users should seek the advise, supervision or consultation of qualified engineers or other safety professionals. Any use of this document, the information contained herein, or any other CEMA publication may only be made with the agreement and understanding tha
11、t the user and the users company assume full responsibility for the design, safety, specifications, suitability and adequacy of the system component, or mechanical or electrical device designed or manufactured using this information. The user and the users company understand and agree that CEMA, its
12、 member companies, its officers, agents and employees shall not be liable in any manner under any theory of liability for the user or users reliance on these recommendations. The users and the users company agree to release, hold harmless and indemnify CEMA, its member companies, successors, assigns
13、, officers, agents and employees from any and all claims of liability, costs, fees (including attorneys fees), or damages arising in any way out of the use of this information. CEMA and its member companies, successors, assigns, officers, agents and employees make no representations or warranties wh
14、atsoever, either express or implied, about the information contained in this document, including, but not limited to, representations or warranties that the information and recommendations contained herein conform to any federal, state or local laws, regulations, guidelines or ordinances.BSR/CEMA B1
15、05.1 Welded Steel Conveyor Pulleys With Compression Type Hubs FOREWORD Welded steel conveyor pulleys have been in common use since the 1930s. MPTA formed a Steel Pulley Engineering Commit- tee in 1958 to develop recommended pulley load ratings. This Committee consisted of pulley and conveyor enginee
16、rs who studied available information on pulley design, theoretical stress analysis, and data from actual tests. All parts of the pulley and shaft assembly were included in the study. In May, 1960, recommended load ratings for standard conveyor pulleys were published. The committee has continued its
17、work since then and published the following: October, 1961 - WELDED STEEL CONVEYOR PULLEY STANDARD, which covered the overall dimensions repre- senting standard practice in welded steel conveyor pulley design at that time. March, 1962 - MPTA submitted both of the above standards with a letter ballot
18、 to a list of substantially concerned organizations. On the basis of suggestions received, the standards were combined and revised. June, 1966 - The combined revised standard was approved as B105.1 U. S. STANDARD SPECIFICATION FOR WELDED STEEL CONVEYOR PULLEYS. June, 1974 - The MPTA submitted MPTA 3
19、01-1974 to ANSI as a proposed revision of B105.1. July 23, 1976 - The standard was approved as ANSI B 105.1-1976 December 30, 1983 - The standard was approved as ANSI B105.1-1983 November, 1987 - The standard was transferred to the Conveyor Equipment Manufacturers Association (CEMA). In 1987, the CE
20、MA Engineering Committee reviewed the standard and decided to revise the method used for deter- mining Drive Shaft diameters so that the method would conform to the ANSI B106.1M-1985 “Design of Transmission Shafting” standard. Also, a runout tolerance on pulley diameters was added. This industry sta
21、ndard is not intended in any way to limit the design of any manufacturer. ANSI B106.1M was withdrawn in 1994. 1995, the CEMA Eng. Conference determined that the methods used by this former standard were technically sound and consistent with modern fatigue analysis methods. Therefore, the relevant da
22、ta from ANSI B106.1M remains incorporated in this standard, and in Chapter 8 of CEMAs Publication “Belt Conveyors for Bulk Materials.” In the 2003 edition, the Conveyor Pulley Subsection: 1) Revised the Scope to clarify that the standard is not applicable to cone clamping keyless locking devices 2)
23、Added Section 2.6 Shaft Runout 3) Added information to Section 3.2 and a footnote to Table 2 describing the origin of the Load Ratings For this 2009 edition, the Conveyor Pulley Committee made the following changes to the 2003 Standard: 1) Added capability to use keyless locking devices in Scope and
24、 3.6 Hub and bushing types 2) Added data and trapezoidal crown to 2.5 Crown 3) Clarified applications where better than standard tolerance is recommended in 2.6 Shaft Runout 4) Added Section 2.7 limiting belt speed to 800 fpm. 5) Added overload information for 6 thbelt book into 3.4 Overloads 6) Sta
25、ndard has had selection method and examples intermingled. Created a generic selection method (4.1 4.7) and put examples into Appendix IV. 7) Inserted figures and tables in area of use rather than grouped at the end. 8) Reduced maximum PIW to 800 in Table 1 of Section 4.1 Pulley Diameter selection. 9
26、) Added resultant load updates from 6 thBelt Book into Section 4.2 and added discussion of use without weight. 10) Created section 4.3 overhung loads, added Appendix III for more background and historical reference. 11) Added overhung load multiplier to section 4.4 Shaft Fatigue. 12) Added Section 4
27、.5 Pulley Fatigue Life. 13) Added overhung load and fatigue factors into Section 4.6 Pulley Selection. 14) Clarified deflection versus stress control in Table 2. and added shaded area to clarify loads potentially exceeding 800 piw. The Conveyor Pulley Subsection of the Conveyor Equipment Manufacture
28、rs Association has the responsibility for maintenance of this standard. Copyright 2009 Conveyor Equipment Manufacturers Association 6724 Lone Oak Blvd Naples, FL 34109 (239) 514-3441 FAX (239) 514-3470 http:/www.cemanet.orgBSR/CEMA B105.1 Welded Steel Conveyor Pulleys With Compression Type Hubs 1. S
29、COPE 2. DIMENSIONS AND TOLERANCES 3 PULLEY SELECTION GENERAL INFORMATION 4. PULLEY SIZE SELECTION METHOD 4.1 Pulley diameter selection 4.2 Belt resultant loads 4.3 Overhung loads 4.4 Shaft fatigue 4.5 Pulley fatigue 4.6 Pulley shaft size selection 4.7 Pulley availability APPENDICES: I. Conversion fa
30、ctors to SI Units II. Shaft deflection formula III. Overhung load derivation and discussion IV. Example Pulley selections 1. Non-drive pulley (no torque or overhung load) 2. Drive pulley (no overhung load) 3. Drive pulley (with overhung loads) 4. Non-symmetric multiple overhung loads (Drive Pulley w
31、ith backstop) TABLE OF CONTENTSBSR/CEMA B105.1 Welded Steel Conveyor Pulleys With Compression Type Hubs 1. SCOPE 1.1 This standard applies to a series of straight face and crowned face welded steel conveyor pulleys that have a continuous rim and two end discs each with a compression type hub to prov
32、ide a clamp fit on the shaft. It is not applicable to single disc pulleys, wing or slat type pulleys, or cast pulleys. This standard applies to pulleys using compression type hubs and high pressure keyless locking assemblies. It does not cover pulleys welded to the shaft. The standard establishes lo
33、ad ratings, allowable variation from nominal dimensions, permissible crown dimen- sions and such overall dimensions as are normally necessary to establish clearances for location of adjacent parts. It is not intended to specify construction details, other than as outlined above, nor to establish the
34、 actual dimensions of any component parts. The series of pulley sizes and shaft combinations shown in Table 3 and the load ratings shown in Table 2 cover the majority of combinations of welded steel pulleys with compression type hubs normally used in belt conveyor and elevator practice. Only the ser
35、ies shown are covered by this standard. This standard is not intended to provide thorough guidance on shaft design at all potential failure points. The standard is intended to provide a shaft diameter at the pulley connection consistent with other external compo- nents such as bearings and drive com
36、ponents. It is assumed shaft is a consistent diameter throughout and layout clearances between components are minimized. 1.2 Welded steel conveyor pulleys covered by this standard should not be used with steel cable and other high modulus belts because such belts create stress concentrations and dem
37、and manufacturing tolerances beyond the capacities of these pulleys. High modulus belts are defined as those having operating tension ratings greater than 800 PIW or a modulus greater than 80,000 PIW. 2. DIMENSIONS AND TOLERANCES 2.1 Diameters Standard welded steel pulley diameters are as shown in T
38、able 3. All other sizes are considered special. These nominal diameters apply to straight and crown face pulleys and are for bare pulleys only; they do not include any increase brought about by lagging. 2.2 Diameter Variations Permissible diameter variations from nominal diameter are based on face w
39、idth as follows: These limitations apply equally to straight face and crown face pulleys with nominal diameter measured at the midpoint of the face width. The diameter is defined as the bare diameter exclusive of lagging. Permissible diameter variations listed are not to be considered as diameter ru
40、nout tolerances. Listed nominal diameter variation may occur from one pulley to another. Diameter runout tolerance at midpoint of the bare pulley face is as follows: 1. FACE WIDTH OVER NOMINAL DIAMETER UNDER NOMINAL DIAMETER Inches Inches Inches 12 thru 26 1/4 1/8 over 26 thru 66 5/8 1/8 DIAMETERS M
41、AXIMUM TOTAL INDICATOR READING ( TIR ) Inches Inches 8 thru 24 0.125 over 24 thru 48 0.188 over 48 thru 60 0.250BSR/CEMA B105.1 Welded Steel Conveyor Pulleys With Compression Type Hubs 2.3 Face Width Variations Permissible face width variation from nominal face width is plus or minus 1/8 inch for al
42、l sizes. Face width is defined as the length of the rim along the shaft axis. The permissible face width variation is not to be construed as an edge runout tolerance. The listed variation in face width may occur from one pulley to another. Edge runout tolerance is specified by the individual pulley
43、manufac- turers. 2.4 Clearance Along the Shaft The distance between the outer faces of the hubs shall never exceed the overall pulley face width. 2.5 Crown Crown is defined as the amount (expressed in inches) per foot of total face width by which the diameter at the center of the face exceeds the di
44、ameter at the edge. Crowns running the full face are often made at a set diameter to face travel change rate, which results in the diameter difference increasing with face width. Amount of crown may be from 1/16 to 1/8 inch per foot of total face width. Trapezoidal crowns have a center section of un
45、iform diameter with tapered sections on either end. The difference in diameter from center to end ranges from 1/8 to 1/4 inch regardless of face width. Crowned end sections typically have a diameter versus face travel rate of change similar to full crowns. 2.6 Shaft Runout The shaft extension runout
46、 is measured from the bearing journals after the shaft is installed in the pulley. Radial shaft extension Total Indicator Reading (TIR) shall not exceed 0.002 inch per inch of shaft extension beyond the bearing center. Typically bearings will introduce an additional runout, which is not included in
47、this limit. Flexible couplings, backstops and parallel shaft mount reducers are used with this limit as long as components remain close to bearing, torque restraint has ample flexibility and visual motion is permitted. Examples of situations where a more conservative limit may be desired are given.
48、Consult your pulley manufacturer for details. As shaft extension increases, runout may become visually noticeable. A perception issue may occur even when component attachments are designed to tolerate the runout. Right angle reducer/motor assemblies supported by pulley shaft commonly require lower l
49、imits. These assemblies tend to be quite long, which accentuates the runout. Drives attached with rigid couplings commonly require lower limits. The coupling essentially increases the shaft extension which accentuates the runout. 2.7 Belt Speed It is not recommended to operate standard drum pulleys above a belt speed of 800 feet per minute. For higher speeds consult your pulley manufacturer for details. 2.BSR/CEMA B105.1 Welded Steel Conveyor Pulleys With Compression Type Hubs 3. PULLEY SELECTION - GENERAL INFORMATION 3.1 Pulley Diameter and Face Width The f
