1、BRITISH STANDARD BS3876-2: 1990 Rope rollers, pulleys, mountings and assemblies for colliery track haulage Part2: Specification for vertical spindle pulleys, mountings and assemblies UDC622.33.005:622.625.5:622.673.3:006.3/.8BS3876-2:1990 This British Standard, having been prepared under the directi
2、onof the Mining and Quarrying Requisites Standards Policy Committee, was publishedunder the authorityofthe Board of BSI and comes into effect on 31May1990 BSI11-1999 First published August1965 Second edition May1990 The following BSI references relate to the work on this standard: Committee referenc
3、e MQE/18 Draft for comment88/74303 DC ISBN 0 580 17991 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Mining and Quarrying Requisites Standards Policy Committee (MQE/-) to Technical Committee MQE/18, upon which the following bodies we
4、re represented: Association of British Mining Equipment Companies British Foundry Association British Steel Industry Federation of Wire Rope Manufacturers of Great Britain Health and Safety Executive Institution of Mining Electrical and Mining Mechanical Engineers Amendments issued since publication
5、 Amd. No. Date CommentsBS3876-2:1990 BSI 11-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 General 1 4 Shape and dimensions of pulley components and mountings 1 5 Materials 1 6 Manufacture 4 7 Marking 5 Appendix A Information to be supplied by
6、the purchaser 6 Appendix B Information to be provided by the supplier 6 Appendix C General recommendations for the design and operating speeds of pulleys 6 Appendix D Typical clause relating to inspection that the purchaser may choose to write into his order or contract for the supply of pulleys, mo
7、untings and assemblies to this Part of BS3876 6 Figure 1 Typical vertical spindle pulley type1 3 Figure 2 Typical vertical spindle pulley types2 and3 3 Table 1 Dimensions of vertical spindle pulleys 2 Table 2 Bearing characteristics and designations for vertical spindle pulleys 4 Publications referr
8、ed to Inside back coverBS3876-2:1990 ii BSI 11-1999 Foreword This Part of BS3876 has been prepared under the direction of the Mining and Quarrying Requisites Standards Policy Committee (MQE/-) and is a full technical revision of BS3876-2:1965 which is withdrawn. The other Parts in the revised editio
9、n of BS3876, are as follows: Part1: Specification for parallel barrel rollers, mountings and assemblies; Part3: (Withdrawn); Part4: (Withdrawn); Part5: Specification for suspended pulley assemblies and clamps. In the revised Parts, the following points should be noted: a) tapered rollers, covered in
10、 the1965 edition of Part2 are now omitted from the revised Part2; b) vertical rollers, which were included in the1965 edition of Part2, are now omitted as it is considered the parallel barrel rollers specified in Part1 can be used in the vertical mode; c) horizontal spindle pulleys, covered in the19
11、65 edition of Part2, are relocated in Part5 of the revised edition; d) Part3:1965 has been withdrawn because there is no longer any requirement for rollers with non-metallic rope bearing surfaces; e) the requirements for mountings for parallel barrel rollers, previously specified in BS3876-4:1966, h
12、ave been revised and incorporated into the expanded edition of Part1; there is therefore no need for retention or revision of a separate Part4. During the revision of this Part of BS3876 all dimensions have been metricated and these are not necessarily straight conversions from the imperial dimensio
13、ns previously adopted. Product certification. Users of this British Standard are advised to consider thedesirability of third party certification of product conformity with this BritishStandard based on testing and continuing surveillance, which may be coupled with assessment of a suppliers quality
14、systems against the appropriate Part of BS5750. Enquiries as to the availability of third party certification will be forwarded by BSI to the Association of Certification Bodies. If a third party certification scheme does not exist, users should consider approaching an appropriate body from the list
15、 of Association members. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages
16、 This document comprises a front cover, an inside front cover, pagesi andii, pages1 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS3876
17、-2:1990 BSI 11-1999 1 1 Scope This Part of BS3876 specifies requirements for vertical spindle rope pulleys, mountings and assemblies intended for use in colliery track haulage. NOTE 1Where the word “vertical” is used in this Part it refers to the installed position of the spindle. This Part of BS387
18、6 applies to: a) pulleys, supplied without mountings, with throat diameters less than300mm; b) mountings; and c) pulley assemblies that comprise both the pulleys and the mountings. The pulleys to which this Part applies are those intended to be used to deflect the haulage rope horizontally through s
19、mall angles around each pulley (i.e.up to about10 , see Appendix C) from its straight line direction of travel. NOTE 2Appendix A gives the information which should be supplied by the purchaser, in his enquiry and/or order for pulleys, mountings and assemblies in accordance with this Part of BS3876.
20、NOTE 3Appendix B gives the information that will be required by the purchaser, to be supplied by the supplier, prior to the supply of pulleys, mountings and assemblies in accordance with this Part of BS3876. NOTE 4Appendix C gives general recommendations for the design and operating speeds for colli
21、ery track haulage pulleys with vertical spindles. NOTE 5No inspection requirements are specified in this Part of BS3876. However, a typical requirement that a purchaser may choose to write into his order or contract for pulleys, mountings and assemblies to this Part is given in Appendix D. NOTE 6The
22、 titles of the publications referred to in this Part of BS3876 are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS3876 the following definitions apply. 2.1 barrel that part of the pulley on which the rope runs 2.2 pulley a drum having a curved or V-shaped barrel, c
23、omplete with spindle and bearings 2.3 mounting the frame to which the pulley is, or is to be attached 2.4 pulley assembly the pulley and its mounting 3 General The pulley components and mountings shall comply with the requirements specified in clauses4 to7 as appropriate. The design of the spindle s
24、hall be such that it is a fixture in the mounting, the bearings being contained within the pulley. 4 Shape and dimensions of pulley components and mountings 4.1 Dimensions The dimensions of the vertical pulley components and mountings shall be as given in Table 1. NOTEFor convenience, typical vertic
25、al pulleys are illustrated in Figure 1 and Figure 2. These illustrations identify the dimensions referred to in Table 1. For vertical spindle pulleys, the bearing face or boss shall be recessed to a maximum depth of3min. Headed stub spindles, when used, shall have a minimum head diameter of40mm and
26、a head thickness not less than6mm. 4.2 Eccentricity of the pulley barrel The eccentricity of the barrel, determined as the radial run out measured normal to the surface at any point on the barrel when the pulley is rotated about its spindle through one revolution, shall not exceed2mm. 5 Materials 5.
27、1 General Subject to the requirements of5.2 the materials used in the construction of the pulleys and mountings shall be in accordance with5.3 and5.4 respectively. 5.2 Light metals In the construction of the pulleys, mountings and assemblies, no metal shall be used that contains more than: a) 15% (m
28、/m) in total of aluminium, magnesium and titanium; b) 6% (m/m) in total of magnesium and titanium. Paints and coatings containing any of the metals aluminium, magnesium and titanium shall not be used. BS 3876-2:1990 2 BSI 11-1999 Table 1 Dimensions of vertical spindle pulleys (see also Figure 1 and
29、Figure 2) Pulley type A ( 1.5mm) B ( 1.5mm) E 1 ( 1.5mm) E 2 ( 1.5mm) aG min. r max. R 1( 1.5mm) R 2( 1.5mm) R 3( 1.5mm) R 4( 1.5mm) S min. Type1 Type2 Type3 mm 75 150 150 mm 115 120 120 mm 100 200 200 mm 150 230 300 mm 30 30 30 mm 3 3 3 mm 30 mm 100 mm 3 3 3 mm 25 25 mm 20 20 20 a Where a headed st
30、ub spindle is used the head is required to have a minimum diameter of40mm, see4.1.BS3876-2:1990 BSI 11-1999 3 NOTEThis figure does not purport to show design details. Figure 1 Typical vertical spindle pulley type1 NOTEThis figure does not purport to show design details. Figure 2 Typical vertical spi
31、ndle pulley types2 and3BS3876-2:1990 4 BSI 11-1999 5.3 Materials for pulleys 5.3.1 Pulley barrels Pulley barrels shall be made from one of the following materials. a) Spheroidal graphite iron having a minimum hardness of200HB throughout any section. b) Carbon steel in accordance with BS3100, steelA3
32、. c) Low alloy(1% chromium) steel in accordance with BS3100, steel BW4. 5.3.2 Spindles Spindles shall be made from wrought steel in accordance with BS970 grade070 M20, with a minimum tensile strength of430N/mm 2 . 5.3.3 Bearings Bearings shall be double sealed, grease filled, single row ball journal
33、 bearings of the metric series in accordance with BS292-1. NOTE 1The use of seize-resistant bearings having polyamide cages is preferred. The types of bearings to be used for each application shall be as given in Table 2. The bearings shall be sealed on both sides with an elastomeric material suitab
34、ly reinforced. NOTE 2Plain metal covers are not sufficient. The elastomeric material shall meet the fire resistant requirements of BS3790 and the antistatic requirements of BS2050. Table 2 Bearing characteristics and designations for vertical spindle pulleys 5.4 Materials for mounting plates Mountin
35、gs, when supplied, shall be fabricated from steel in accordance with either of the following: a) carbon steel in accordance with BS970, grade070 M20; b) weldable structural steel in accordance with BS4360, grade43A. 6 Manufacture 6.1 General Pulley components and mountings shall comply with6.2 and6.
36、3. NOTEIt is important that: a) all pulley components and mountings should be free from harmful defects; b) the barrels of pulleys should be smooth and free from all projections cross-jointing and defects that may be injurious to ropes; c) all machined parts should be free from sharp corners, edges
37、and undercuts, tool marks and scoring that are likely to cause excessive concentrations of stress; d) all welds should be free from the imperfections described in section6 of BS499-1:1983 and all defects (e.g.rough edges, weld spatter) likely to be injurious to persons or equipment, or to interfere
38、with mating parts should be removed. The attention of the supplier is drawn to the fact that the purchaser may reject pulleys, mountings and assemblies as being unsatisfactory on any of these grounds, notwithstanding that the requirements of this Part of BS3876 are complied with, subject to discussi
39、on in accordance with normal commercial practice. 6.2 Welding Welding techniques shall be in accordance with BS5135. NOTE 1Details of each welded joint should be agreed between the supplier and the purchaser and shown in detailed drawings, copies of which are held by both the supplier and the purcha
40、ser see Appendix B e). NOTE 2Minor defects in castings, that will not affect the mechanical strength or performance of any pulley, may be rectified by welding when the manufacturer is able by so doing to provide a satisfactory casting. When repairs to cast steel are to be undertaken then they shall
41、be in accordance with BS4570. 6.3 Machining tolerances The machining tolerances for the outer diameter of the bearing shall be M7 and the machining tolerances on the spindle diameter shall be g6, as specified in BS4500-1. Pulley type Pulley speed Bearing location Bearing designation Type1 r/min Up t
42、o800 Top 6304-2 RS Bottom 6306-2 RS Over800 Top 6404-2 RS Bottom 6406-2 RS Type2 and Type3 Up to800 Top and bottom 6306-2 RS Over800 Top and bottom 6306-2 RSBS3876-2:1990 BSI 11-1999 5 7 Marking Each pulley and mounting shall be marked 1)with an etched, stamped or cast identity, giving the following
43、 information which shall be readily visible during normal operation of the pulley: a) the manufacturers name, identification mark or trademark; b) the number of this Part of this British Standard i.e.BS3876-2; c) in the case of pulley drums, an indication of the material using the following code: S
44、carbon steel SA cast steel alloy SG spheroidal graphite iron d) in the case of mountings, the reference type (seeTable 1) of the pulley for which the mounting is intended. 1) Marking BS3876-2 on or in relation to a product represents a manufacturers declaration of conformity, i.e.a claim by or on be
45、half of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable.BS3876
46、-2:1990 6 BSI 11-1999 Appendix A Information to be supplied by the purchaser The purchaser should supply the following items of information at the time of enquiry or order: a) the number of this British Standard, i.e.BS3876-2; b) the type reference of the pulley required (seeTable 1); c) the materia
47、l of the pulley barrel (see5.3.1); d) whether castings are to be inspected and tested during manufacture (see also Appendix D); e) details of any tests which are required to be carried out on the pulley assembly during manufacture (see also Appendix D); f) the type of mounting to be supplied, if req
48、uired. Appendix B Information to be provided by the supplier Prior to supply, the supplier is to provide a detailed drawing, or drawings, including the following particulars. a) Pulley barrels. Material specification and full dimensional details. b) Spindles. Material specification and full dimensio
49、nal details. c) Bearings. Manufacturer and identification reference. d) Mountings. Material and dimensional details. e) Welding. Details of any welding, i.e.preparation, weld lengths and size, the welding material and operation used. Appendix C General recommendations for the design and operating speeds of pulleys The design of haulage pulleys depends basically on the rope speed and the loading. Several characteristics of the pulley itself affect the choice when considering a particular duty, as follows. a) Eccentricity
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