1、BRITISH STANDARD BS 6911-6: 1992 ISO 8813:1992 Testing earth-moving machinery Part 6: Method for the evaluation of lift capacity of pipelayers and wheel tractors or loaders equipped with side boomBS6911-6:1992 This British Standard, having been prepared under the directionof the Technical Committee
2、B/513, was publishedunder the authorityofthe Standards Boardand comes into effect on 15 June 1992 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference B/513/1 Draft for comment 90/14230 DC ISBN 0 580 20865 6 Committees responsible for this British Standar
3、d The preparation of this British Standard was entrusted by the Technical Committee B/513, Construction Equipment and Plant, and Site Safety, to Subcommittee B/513/1, Earth-moving machinery, upon which the following bodies were represented: Associated Offices Technical Committee British Coal Corpora
4、tion Construction Plant (Hire Association) Federation of Civil Engineering Contractors Federation of Manufacturers of Construction Equipment and Cranes Health and Safety Executive Institution of Civil Engineers Institution of Highways and Transportation Ministry of Defence Silsoe Research Institute
5、Amendments issued since publication Amd. No. Date CommentsBS6911-6:1992 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative references 1 3 Definitions 1 4 Lift capacity calculations procedure 3 5 Verification testing, test results and vali
6、dation of calculations 3 6 Performance requirements 4 7 Rated lift capacity 5 8 Load rating chart 5 9 Test summary 14 Annex A (informative) Hook and rope Maintenance and repair 16 Figure 1 Pipelayer 6 Figure 2 Wheeled machine steered straight 7 Figure 3 Articulated wheeled tractor steered left; non-
7、oscillating axle 8 Figure 4 Articulated wheeled tractor steered left; oscillating axle 9 Figure 5 Articulated wheeled machine steered right; non-oscillating axle 10 Figure 6 Articulated wheeled machine steered right; oscillating axle 11 Figure 7 Articulated machine using outriggers; steered left 12
8、Figure 8 Articulated machine using outriggers; steered right 13 Figure 9 Lift capacity 15 List of references Inside back coverBS6911-6:1992 ii BSI 10-1999 National foreword This Part of BS 6911 has been prepared under the direction of Technical Committee B/513, Construction Equipment and Plant, and
9、Site Safety. It is identical with ISO 8813:1992 Earth-moving machinery Lift capacity of pipelayers and wheeled tractors or loaders equipped with side boom published by the International Organization for Standardization (ISO). ISO 8813 was prepared by Subcommittee SC 1, Test methods relating to machi
10、ne performance, and SC 2, Safety requirements and human factors, of Technical Committee ISO/TC 127, Earth-moving machinery, with the active participation and approval of the UK. It is envisaged that a Part of BS 6911, identical with ISO 9248 Earth-moving machinery Units for dimensions, performance a
11、nd capacities and their measurement accuracies, will be published. 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 immunit
12、y from legal obligations. Cross-references International Standard Corresponding British Standard ISO 6016:1982 BS 6300:1982 Methods of measuring the masses of whole machines, their equipment and components of earth-moving machinery (Identical) ISO 6165:1987 BS 6914 Terminology (including definitions
13、 of dimensions and symbols) for earth-moving machinery Part 1:1988 Glossary of terms for basic types of earth-moving machinery (Identical) ISO 7131:1984 BS 6685:1986 Glossary of terms for loaders used for earth-moving (Identical) ISO 7136:1986 BS 6914 Terminology (including definitions of dimensions
14、 and symbols) for earth-moving machinery Part 5:1988 Glossary for pipelayers (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may hav
15、e had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS6911-6:1992 BSI 10-1999 1 1 Scope This International Standard provides a uniform method of calculating, and a test method for validating, rated lift capacity as presented in commercial literature
16、 for pipelayers and wheeled tractors or loaders equipped with a vertical-only pivoted, hydraulic or mechanically operated, side boom. The rated lift capacity considers hoist mechanism limits, tipping loads and rope factor. After the lift capacity has been calculated and validated, a reduction factor
17、 is applied to establish the rated lift capacity for the specific pipelayer or wheeled machine configuration. This International Standard applies to machines having a lift capacity greater than 10 000 N when used in lifting applications. It includes pipelayers as defined in ISO 6165 and ISO 7136, an
18、d wheeled tractors and loaders as defined in ISO 6165, ISO6747 and ISO 7131. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. A
19、ll standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standar
20、ds. ISO 6016:1982, Earth-moving machinery Methods of measuring the masses of whole machines, their equipment and components. ISO 6165:1987, Earth-moving machinery Basic types Vocabulary. ISO 6747:1988, Earth-moving machinery Tractors Terminology and commercial specifications. ISO 7131:1984, Earth-mo
21、ving machinery Loaders Terminology and commercial specifications. ISO 7136:1986, Earth-moving machinery Pipelayers Terminology and commercial specifications. ISO 9248:, Earth-moving machinery Units for dimensions, performance and capacities, and their measurement accuracies 1) . 3 Definitions For th
22、e purposes of this International Standard, the following definitions apply. 3.1 load external force including the weight of attaching equipment applied at the load hook. See Figure 1 and Figure 2 3.2 lift point line vertical line through the centre of the load hook 3.3 outrigger extendable or fixed
23、arm attached to the base machine which rests on the supporting surface and defines the tipping line. See Figure 7 and Figure 8 3.4 tipping line; balance point fulcrum (See3.4.1 to 3.4.4.) 3.4.1 tipping line (for crawler machines) outer edge of the outer track link rail on the boom side of the machin
24、e. See Figure 1 3.4.2 tipping line (for wheeled machines with non-oscillating axle) line connecting the centres of contact of the front and rear tyres with the ground reference plane on the boom side of the machine. See Figure 2, Figure 3 and Figure 5 3.4.3 tipping line (for wheeled machines with os
25、cillating axle) line in the ground reference plane connecting the centre of contact of the tyre on the rigid axle on the boom side of the machine and the vertical line through the centre of oscillation of the oscillating axle. See Figure 4 and Figure 6 3.4.4 tipping line (for machines with outrigger
26、s) line in the ground reference plane connecting the centres of contact of the outrigger pads on the boom side of the machine. See Figure 7 and Figure 8 3.5 load overhang horizontal and perpendicular distance from the tipping line to the lift point line. See W12 in Figure 1 and WW12 in Figure 2 to F
27、igure 8 1) To be published.BS6911-6:1992 2 BSI 10-1999 3.6 moment acting to overturn machine product of a force acting through the lift point line and the load overhang 3.7 moment acting to resist overturn of machine product of the weight of the machinery and the distance from the centre of gravity
28、to the tipping line 3.8 balance point (See 3.8.1 and 3.8.2.) 3.8.1 calculated balance point moment acting to overturn the machine at a specific load overhang which is equal to the moment acting to resist over-turning 3.8.2 measured balance point (See 3.8.2.1 to3.8.2.3.) 3.8.2.1 measured balance poin
29、t (for crawler machines) moment acting to overturn the machine at a specific load overhang that will not cause any track roller on the track opposite the boom side to lift more than6mm from the track link 3.8.2.2 measured balance point (for wheeled machines) moment acting to overturn the machine at
30、a specific load overhang that will not cause any tyre on the side opposite the boom to lift more than 2 mm from the ground reference plane 3.8.2.3 measured balance point (for machines with outriggers) moment acting to overturn the machine at a specific load overhang that will not cause any tyre or o
31、utrigger pad on the side opposite the boom to lift more than 2 mm from the ground reference plane 3.9 tipping load vertical load applied at the load hook at a specific load overhang which achieves the balance point 3.10 rope wire rope used for the boom support or the load line 3.11 rope factor rope
32、breaking strength divided by rope load 3.12 draw works (See 3.12.1 and 3.12.2.) 3.12.1 mechanical draw works drums and mechanical drive systems that operate the boom position and the load hoist lines 3.12.2 hydraulic draw works hydraulic pumps, motors, valves, lines and cylinders that position the b
33、oom and operate the hoist line 3.13 hydraulic pressure (See 3.13.1 and 3.13.2.) 3.13.1 working circuit pressure nominal pressure applied to the specific circuit by the pump(s) 3.13.2 holding circuit pressure maximum static pressure in a specific circuit, limited by a relief valve pressure that is me
34、asured at a flow no greater than 10 % of rated circuit flow 3.14 lift mechanism lift capacity Load that can be lifted at the load hook by a force generated by any combination of mechanical or hydraulic power to the draw works and/or hydraulic cylinder(s), at a specific load overhang without exceedin
35、g any of the following limits: tipping load; hydraulic working or holding circuit pressure in any circuit; rope factor in either the load or boom hoist line. Some of the possible combinations of power to the lift mechanism include: a) mechanical draw works power to the load and boom hoist line; b) h
36、ydraulic draw works power to the load and boom hoist line; c) mechanical power to the draw works for the load hoist line and hydraulic cylinder(s) for the boom hoist line; d) hydraulic cylinders for the load and boom hoist line. The lift mechanism powers may be sub-defined as in3.14.1 to 3.14.3. 3.1
37、4.1 mechanical draw works lift capacity lift capacity obtained by applying mechanical power to the load and boom hoist draw works without exceeding tipping load or rope factorBS6911-6:1992 BSI 10-1999 3 3.14.2 hydraulic lift capacity lift capacity obtained by applying working circuit pressure to the
38、 hydraulically actuated draw works and/or lift cylinder(s) without exceeding the holding circuit pressure in any circuit, the tipping load, or the rope factor 3.14.3 rope factor lift capacity lift capacity, limited so that the rope factor is not less than 4, or under special provisions, not less tha
39、n 2,5 (see 6.1.2) 3.15 rated lift capacity maximum load that can be raised without exceeding the rated tipping load lift capacity, the rated lift mechanism lift capacity, or the rated rope factor lift capacity. See clause 7 3.16 operating mass of the machine (See definition2.4 in ISO 6016:1982.) NOT
40、E 1Equipment such as dozers and buckets, if included in the manufacturers specifications, are in the transport position recommended by the manufacturer when assessing operating mass. 4 Lift capacity calculations procedure 4.1 Machine preparation All lift capacity calculations shall be made with adju
41、stable counterweights fully extended and with the machine on a firm level surface. 4.2 Attachment variations Because of the number of attachment variations possible, the manufacturer shall publish revised lift capacity charts if these variations decrease the machine rated lift capacity by more than
42、5 %. 4.3 Tipping load calculation This calculation is made, in accordance with 4.3.1 to4.3.3.2, at a given load overhang position to determine the tipping load. Sufficient load overhang dimensions shall be used to develop the lift capacity chart. See Figure 9. 4.3.1 Pipelayers Calculations shall be
43、made at standard machine configuration. 4.3.2 Wheeled machines Preliminary calculations shall be made using load overhang lines defined in 3.5 with the machine steered straight ahead, steered fully left, and steered fully right. These preliminary calculations shall be used to select the steering pos
44、ition that results in minimum tipping load. The steering position that results in minimum tipping load for both oscillating axle and non-oscillating axle configurations shall be used to develop the lift capacity chart. 4.3.3 Machines with outriggers Tipping load calculations for machines equipped wi
45、th outriggers shall be made to develop lift capacity charts both with and without outriggers being used, in accordance with 4.3.3.1 and 4.3.3.2. 4.3.3.1 When making calculations for machines not using outriggers, the requirements of 4.3.2 apply. 4.3.3.2 When making calculations for machines using ou
46、triggers, the steering position that results in minimum tipping load shall be used to develop the lift capacity chart. 4.4 Lift mechanism lift capacity calculations This calculation is made at a load overhang to determine the load that can be lifted at the load hook when the load from the lift mecha
47、nism (defined in 3.14) is less than the tipping load. Sufficient load overhang dimensions shall be used to develop the lift capacity chart. See Figure 9. 5 Verification testing, test results and validation of calculations 5.1 Test site The test site shall consist of a firm and level horizontal concr
48、ete, steel or equally firm surface and shall be level within 1 %. 5.1.1 Dead weight test site The load shall be applied by lifting on a fixed anchor (the “dead weight”) and adjusting the lifting force to achieve the balance point. 5.1.2 Live weight test site The load shall be applied by a weight of
49、known mass (the “live weight”) with the load overhang adjusted to achieve the balance point. 5.2 Test equipment 5.2.1 Force transducer of sufficient capacity or weights of known mass. 5.2.2 Means to measure the load overhang distance. 5.2.3 Means to determine that the lift point line is perpendicular to the ground reference plane.BS6911-6:1992 4 BSI 10-1999 5.2.4 Means to monitor pressure in all hydraulic circuits that will be under pressure during the lift capacity tests. 5.3 Test equipment accuracy Accuracy of the instrumenta
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