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1、. INTERNATIONAL STANDARD INTERNATIONAL ORGANlZATlON FOR STANDARDlZATlON .MEXflYHAPOflHAI OPI-AHCI3AUHR II0 CTAHLIAPTW3AUHH.ORGANlShTlON INTERNATIONALE DE NOAMALlSATlnN Continuous mechanical handling equipment for loose bulk materials - Troughed belt conveyors (other than portable conveyors) - Idlers
2、 Engins de manutention continue pour produits en vrac - Transporteurs d courroie en auge (autres que mobiles) - Rouleaux de sou tien First edition - 1975-10-15 UDC 621.867.2 Ref. No. IS0 1537-1975 (El Descriptors : handling equipment, continuous handling, bulk products, conveyors, belt conveyors, id
3、lers, dimensions. Price based on 5 pages FOREWORD IS0 (the International Organization for Standardization) is a worldwide federation of national standards institutes (IS0 Member Bodies). The work of developing International Standards is carried out through IS0 Technical Committees. Every Member Body
4、 interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the Technical Committe
5、es are circulated to the Member Bodies for approval before their acceptance as International Standards by the IS0 Council. Prior to 1972, the results of the work of the Technical Committees were published as IS0 Recommendations; these documents are now in the process of being transformed into Intern
6、ational Standards. As part of this process, Technical Committee ISO/TC 101 has reviewed IS0 Recommendation R 1537 and found it technically suitable for transformation. International Standard IS0 1537 therefore replaces IS0 Recommendation R 1537-1970 to which it is technically identical. IS0 Recommen
7、dation R 1537 was approved by the Member Bodies of the following countries : Belgium Canada Colombia Czechoslovakia Egypt, Arab Rep. of Finland France Germany Greece India Israel Italy Netherlands New Zealand Norway South Africa, Rep. of Spain Sweden Switzerland Thailand Turkey United Kingdom U.S.A.
8、 U.S.S.R. The Member Body of the following country expressed disapproval of the Recommendation on technical grounds : Japan No Member Body disapproved the transformation of ISO/R 1537 into an International Standard. 0 International Organization for Standardization, 1975 l Printed in Switzerland -,-,
9、- INTERNATIONAL STANDARD IS0 1537-1975 (E) Continuous mechanical handling equipment for loose bulk materials - Troughed belt conveyors (other than portable conveyors) - Idlers 1 SCOPE AND FIELD OF APPLICATION This International Standard specifies the dimensions of idlers and their arrangement and cl
10、earances for troughed belt conveyors (other than portable conveyors) with three carrying idlers. 2 REFERENCE IS0 64, Steel tubes - Outside diameters. 3 CLASSIFICATION Idlers for belts include a) carrying idlers in line, of equal length, supporting the carrying belt; b) return idlers of two types, su
11、pporting the return belt, namely : 1) with one single return idler; 2) with one set of two return idlers of equal length, the axes of which are equally inclined to the horizontal to form a V. The angle of inclination is IO”. The latter arrangement is applicable to conveyors with belts at least 800 m
12、m wide. 4 SPECIFICATIONS 4.1 Materials 4.1 .I Steel Where the idlers, carrying and return, are constructed from steel tubes, their diameters shall be extracted from IS0 64 (see table 1). 4.1.2 Other materials The subject of idlers made of other materials will be considered at a later date. 4.2 Dimen
13、sions 4.2.1 External diameters, dl, of carrying idlers and return idlers -I -._ +- FIGURE 1 - Idler TABLE 1 - External diameters, dl, of carrying idlers and return idlers 63.5 76.1 88.9 101.6 108 127 133 152.4 159 168.3 193.7 219.1 in 2 l/2 3 3 If2 4 4 II4 5 5 l/4 6 6 l/4 6 518 7 5/8 8 5/8 IS0 1537-
14、1975 (El 4.2.2 Lengths These lengths are applicable to fixed conveyors; other lengths may be necessary for field conveyors. 4.2.2.1 LENGTHS OF CARRYING IDLERS Table 2 gives the lengths of carrying idlers suitable for troughed belt conveyors using a centre idler and two side idlers in line. FIGURE 2
15、-Carrying idlers TABLE 2 - Lengths of carrying idlers II See ISOIR 251, Widths and lengths of conveyor belts. 2 -,-,- IS0 1537-1975 (E) 4.2.2.2 LENGTHS OF RETURN IDLERS Table 3 gives the lengths of the return idlers f6r the two following arrangements : a) one single return idler (see figure 3); b) o
16、ne set of two return idlers in V form (see figure 4). FIGURE 3 -One return idler ,A .- IOmm c- /:3 -_ 6 -_ ./-.- -. 1. “0 I2 FIGURE 4 -Two return idlers in V form TABLE 3 - Lengths of return idlers TABLE 3 - Lengths of return idlers Belt widths 111 mm in mm in mm in 400 16 500 20 I 500 I I 20 600 I
17、I 24 r- 650 1 26 750 30 1 800 32 950 38 465 185/B 1 000 40 1 150 46 600 24 1 200 48 1 400 56 700 (670) ) 28 1 400 56 1 600 64 800 (750) ) 32 1) These values are employed for conveyors used in and supplied to COMECON courtries. 3 -,-,- IS0 1537-1975 (E) 4.2.3 Spindle ends FIGURE 5 - Spindle end witho
18、ut added end cap FIGURE 6 - Spindle end with added end cap The standard dimensions for spindle ends are - diameter d2; - diameter d3, corresponding to the inner diameter of the bearing; - partial lengths m and n; - width on flats 61. TABLE 4 - Spindle ends - Dimensions in millimetres 1 6 1 d3 I bl I
19、 m I n ) I without added end cap (see figure 5) I with added end cap (see figure 6) 20 25 30 l-l 40 35 45 20 25 30 40 20 25 (30) without added end cap with added end cap TABLE 5 - Spindle ends - Dimensions in inches - d2 d3 61 m ” 2) 25132 or 51 I64 25132 or 51164 63164 63164 1 3/16 1 3/16 1 9/l 6 o
20、r 1 37/64 1 9/l 6 or 1 37/64 1 3/8 25132 or 51164 1 49/64 or 1 25/32 63164 (1 3/l 6) 35164 or 9/I 6 45164 or 23132 55164 or 718 1 11164 1 3/16 1 31/64or 1 l/2 5132 11132 or 23164 5132 15132 or 31164 5132 15132 or 31 I64 5132 15132 or 31164 5132 25164 5132 15132 or 31 I64 I) For return idlers, the di
21、mension n + 10 mm is allowed. 2) For return idlers, the dimension n + 25164 in is allowed. 4 IS0 1537-1975(E) 4.3 Arrangement of carrying idlers1 ) 4.3.1 Angle of inclination X of side idlers 4.3.1.1 DEFINITION Angie of the axis of these idlers from the horizontal. 4.3.1.2 VALUES Values of the angle
22、 of inclination h for the normal parts of the installation are given in table 6. TABLE 6 - Values of the angle of inclination h For all standard widths of belts 20” 25” 30” 35 45” (55”) NOTES 1 In view of the developments in belt manufacturing techniques, when using angles greater than 30” the user
23、shall satisfy himself that the belt will trough adequately on the idler set. 2 The 55” value shall not be used except for handling of special materials. 4.3.2 Angle of tilt cp of side idlers 4.3.2.1 DEFINITION Angle formed by the projections of their axes and the axis of the centre idler on the belt
24、 plane (see figure 2). 4.3.2.2 VA LU ES If an angle of tilt cp is required, it shall be chosen as a function of the angle of inclination h and the belt speed, and shall be as small as practicable, and in any case not more than 3 . 4.3.3 Gap between side idlers and centre idler The gap between side i
25、dlers and the centre idler is 10 mm (25/64 in) maximum. In order to comply with this condition, it may be necessary, in certain cases, to adopt minor modifications in design, such as rounding or chamfering of spindle ends or to reduce dimension n as defined in 4.2.3. In any case the distance n defin
26、ed in 4.2.3 shall remain at 4 mm (5/32 in). 4.4 idlers clearance 4.4.1 Definition The gap between the periphery of idlers and the top of the idler transom or any other structural part (see figure 2). 4.4.2 Values The minimum values for idlers clearances are given in table 7. TABLE 7 - Minimum idlers
27、 clearances Idler diameters Minimum clearance a mm in mm in 63.5 to 133 2 l/2 to 5 114 30 1 l/4 152.4 to 168,3 6 to 6 5/8 38 1 t/2 193.7 7 518 50 2 219.1 8 578 60 2 3/a I) The case where the axis of side idlers and centre idler are not in the same plane (staggered idlers) will be the subject of further consideration. 5