BS ISO 1813-2014 Belt drives V-ribbed belts joined V-belts and V-belts including wide section belts and hexagonal belts Electrical conductivity of antistatic belts Characteristics .pdf

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1、BSI Standards PublicationBS ISO 1813:2014Belt drives V-ribbed belts,joined V-belts and V-beltsincluding wide section beltsand hexagonal belts Electrical conductivity ofantistatic belts: Characteristicsand methods of testBS ISO 1813:2014 BRITISH STANDARDNational forewordThis British Standard is the U

2、K implementation of ISO 1813:2014. The 2014 revision of ISO 1813 includes criteria and a test method for the antistatic property of the backside, flat surface of V-ribbedbelts. The UK committee believes that this test method applies only to those belts intended for use on drive systems that incorpor

3、ate either backside driven pulleys, or backside idlers. For belts intended for use solely with grooved inside pulleys (i.e. driving surfaces on the rib side only) there is no requirement for anti-static property on the backside surface. Such belts may not necessarily meet the cri-teria for the maxim

4、um electrical resistance on the back surface, as outlined in Table 4.The UK participation in its preparation was entrusted to Technical Committee MCE/10, Belts test hexagonal belts on both sets of driving surfaces at two points each along the length of the belt; for joined V-belts, when testing the

5、belt as a whole, test at two points along the length of the belt; when testing each strand of belt within the joined V-belt, test each belt at two points along the length of the belt (see Note 1 to Table 3); for V-ribbed belts, for standard widths up to and including 20 ribs, test each belt at two p

6、oints along the length of the belt (see Note 1 to Table 2).For longer belts, increase the number of test points by one for each increase in length of 1 000 mm or part thereof.7.4 Belt electrical resistance criteriaNone of the individual values obtained in 7.3 shall be greater than the values specifi

7、ed in Tables 1, 2, and 3.For marking belts, the electrical conductivity of belts shall fulfil the values given in Tables 1, 2, and 3.8 Proof test method for individual belts (laboratory method)8.1 Conditioning and test conditionsThe following treatments and the test shall be carried out in a standar

8、d atmosphere 23/50 in accordance with ISO 23529 at a temperature of (23 2) C and (50 5) % relative humidity.8.2 Electrical conductive coatingTo ensure minimum electrical resistance between the test metal electrodes and the test belt surfaces, a conductive coating shall be provided comprising eithera

9、) a conductive silver lacquer or colloidal graphite, which shall be of the type that dries at room temperature and the surface resistivity of the dried film shall be below 10 m, orb) a conductive liquid consisting of 800 parts of anhydrous polyethylene glycol of molecular mass 600, 200 parts of wate

10、r, 1 part of wetting agent, and 10 parts of potassium chloride.In the latter case, the electrode contact areas shall be completely wetted and remain so until the end of the test.8.3 PreparationThe belt shall be maintained in an unstrained state, for a period not less than 2 h in a standard atmospher

11、e 23/50, in accordance with ISO 23529.Immediately following this conditioning, clean the belt surfaces that are to be placed against the test electrodes by rubbing with dry Fullers earth using a clean cloth.4 ISO 2014 All rights reservedBS ISO 1813:2014ISO 1813:2014(E)After cleaning away all traces

12、of the powder, wipe the surface with a cloth moistened with distilled water and rub dry with a clean dry cloth, while avoiding straining the test piece. Then, immediately apply the conductive coating material (see 8.2) on each of the belt/electrode contact areas for a length of 25 mm along the belt;

13、 these two zones shall be separated by a dry distance of 100 mm 6 mm.8.4 Test procedureThe test shall be carried out in a place having a standard atmosphere 23/50, in accordance with ISO 23529.Clean the electrodes. With the belt being in an unstrained state, apply the electrodes on the coated contac

14、t areas so only these surfaces of the belt are in contact.The belt being tested shall not be deformed (flexed). To ensure adequate electrical contact between the belt and electrode, apply the force as detailed in 5.3.Avoid breathing on the test surface as any condensation of moisture can falsify the

15、 result.Measure the resistance in ohms, 5 s 1 s after applying the voltage. The voltage applied shall not be less than 40 V.Measure the distance, L, between the contact areas of the belt and the sum, l, of the contact lengths of the face or faces of the belt.8.5 Number of testsMake at least five tes

16、ts, spaced at regular intervals along the complete length of the belt.NOTE If the belt is too short to carry out this minimum of five tests, the number of tests can be reduced accordingly.8.6 Belt electrical resistance criteriaThe specified maximum value belt electrical resistance, R, expressed in o

17、hms, in Tables 1, 2, and 3, is derived from Formula (1):RLl6105(1)whereL is the dry distance between the electrodes;l is the total length of contact across the width of the belt with the electrode.For example:a) narrow V-belt: sum of two equal flank lengths of the belt section;b) V-ribbed belts:1) o

18、n ribs: sum of the measured flank contact lengths per rib multiplied by the number of ribs;2) on back: pitch, P, multiplied by the number of ribs;c) back of a joined V-belt: width of electrode or width of belt, whichever is the lesser;d) joined V-belts: sum of two equal flank lengths of the belt sec

19、tion multiplied by the number of belts.None of the individual values obtained in 8.5 shall be greater than the specified value. ISO 2014 All rights reserved 5BS ISO 1813:2014ISO 1813:2014(E)Table 1 Limit values of electrical resistance when testing the driving surfaces of single V-belts including he

20、xagonal beltsMaximum resistance MIndustrial V-belt Automotive V-beltAgricultural beltClassical ISO 4183 ISO 4184Narrow ISO 4183 ISO 4184Wide ISO 1604Narrow ISO 2790Wide ISO 3410Hexagonal ISO 528987,16,3Y5,654,48 ZW 16HAAHBB43,63,2A SPZW 20W 25 AV 10 HGHCC2,82,52,24BSPA W 31,5W 40AV 13 HHHI HDD21,81,

21、6C SPBSPCW 50 HJHK1,421,261,2D W 63 HLHMHN1,1210,9E W 80W 100HONOTE 1 Distance between the contact areas: L = 100 mm.NOTE 2 Electrode configuration: see Figures 3, 4, 5, and 6.6 ISO 2014 All rights reservedBS ISO 1813:2014ISO 1813:2014(E)Table 2 Limit values of electrical resistance when testing the

22、 driving surfaces of V-ribbed beltsNumber of ribsaMaximum resistance MISO 9981 and ISO 9982 V-ribbed belts profilePH PJ PK PL PM3 9 5,6 3,2 2,1 1,14 6,7 4,14 2,5 1,6 0,85 5,4 3,3 2 1,3 0,646 4,5 2,8 1,6 1,1 0,537 3,9 2,4 1,4 0,9 0,468 3,4 2 1,3 0,8 0,49 3 1,9 1,1 0,7 0,3510 2,7 1,7 1 0,6 0,33NOTE 1

23、Distance between the contact areas: L = 100 mm.NOTE 2 Electrode configuration: see Figure 4.aFor V-ribbed belts with greater than four ribs, it is necessary to move the belt so that all ribs are tested.Table 3 Limit values of electrical resistance when testing the driving surfaces of joined V-beltsN

24、umber of strands in bandaMaximum resistance MNarrow ISO 5290Classical ISO 52919J 15J 20J 25J AJ BJ CJ DJ2 1,8 1,26 1 0,8 1,8 1,26 1 0,71NOTE 1 Distance between the contact areas: L = 100 mm.NOTE 2 Electrode configuration: see Figure 4.aFor joined V-belts with greater than two strands, it is necessar

25、y to move the belt so that the entire belt is tested.Table 4 Limit value of electrical resistance when testing the back surface of V-ribbed beltsNumber of ribsBack maximum resistance MISO 9981 and ISO 9982 V-ribbed belts profilePH PJ PK PL PM3 12,5 8,5 5,6 4,3 2,14 9,4 6,4 4,2 3,2 1,65 7,5 5,1 3,4 2

26、,6 1,36 6,3 4,3 2,8 2,1 1,17 5,4 3,7 2,4 1,8 0,98 4,7 3,2 2,1 1,6 0,89 4,2 2,9 1,9 1,4 0,710 3,7 2,6 1,7 1,3 0,6 ISO 2014 All rights reserved 7BS ISO 1813:2014ISO 1813:2014(E)Dimensions in millimetresKey1 suitable mass which exerts at each metal contact a force of 1 N/mm of the top width of the belt

27、2 belt3 metal contact4 insulating base5 angle to suit belt6 insulated leads to insulation test meterFigure 1 Apparatus for measuring the electrical resistance of belts8 ISO 2014 All rights reservedBS ISO 1813:2014ISO 1813:2014(E)Key1 mass2 profile3 force, in decanewtons (daN)Figure 2 Loading apparat

28、us (example)Figure 3 Fixed electrode for testing single belts ISO 2014 All rights reserved 9BS ISO 1813:2014ISO 1813:2014(E)a) Narrow V-beltsclassical V-beltsautomotive V-beltsb) Hexagonal V-beltsc) Variable speed V-beltsd) Jointed V-belts e) Multi ribbed belts (three or four ribs)KeyB insulating ba

29、seE electrodeM suitable mass which exerts at each metal contact a force of 1 N/mm of the top width of beltFigure 4 Electrode configurations for measuring the electrical resistance of beltsDimensions in millimetresFigure 5 Movable electrode for testing single belts (schematic diagram)10 ISO 2014 All

30、rights reservedBS ISO 1813:2014ISO 1813:2014(E)Figure 6 Movable electrode for testing single belts (example) ISO 2014 All rights reserved 11BS ISO 1813:2014ISO 1813:2014(E)Annex A (informative) Movable electrode for testing single beltsExample in accordance with Figures 3 and 6.Table A.1 Recommended

31、 dimensionsDimensions in millimetresProfile wnomd m nISO 4183 and ISO 4184 classical V-beltsY 6 16 15 18Z 10 20 18 23A 13 20 18 25B 17 25 20 27C 22 25 20 31D 32 31,5 25 42E 40 40 30 50ISO 4183 and ISO 4184 narrow V-beltsSPZ 10 20 18 22SPA 13 20 18 24SPB 17 25 20 26SPC 22 25 20 2912 ISO 2014 All righ

32、ts reservedBS ISO 1813:2014BS ISO 1813:2014ISO 1813:2014(E) ISO 2014 All rights reservedICS 21.220.10Price based on 12 pagesThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other standards-related publications, information and services.BSI is

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