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1、BRITISH STANDARD BS 4999-141: 1987 General requirements for rotating electrical machines Part 141: Specification for standard dimensions UDC 621.31313:006.78 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:50:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4999-141:1987 This British Stand
2、ard, having been prepared under the direction of the Power Electrical Engineering Standards Committee, was published under the authority of the Board of BSI and comes into effect on 27 February 1987 BSI 02-1999 First published as BS 4999-10 May 1976 First revision as BS 4999-141 February 1987 The fo
3、llowing BSI references relate to the work on this standard: Committee reference PEL/1 Revision announced in BSI News October 1986 ISBN 0 580 15781 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Power Electrical Engineering Standards C
4、ommittee (PEL/-) to Technical Committee PEL/1, upon which the following bodies were represented: Association of Consulting Engineers Association of Electrical Machinery Trades Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Ltd.) Association of Supervisory and Ex
5、ecutive Engineers British Coal Bureau of Engineer Surveyors ERA Technology Ltd. Electricity Supply Industry in England and Wales Engineer Surveyors Section of the ASTMS Engineering Equipment and Materials Users Association Health and Safety Executive Ministry of Defence Power Generation Association
6、(BEAMA Ltd.) Rotating Electrical Machines Association (BEAMA Ltd.) South of Scotland Electricity Board Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:50:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4999-141:1987 BSI 02-
7、1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2References1 3General1 4Shaft end dimensions2 5Dimensions of foot-mounted frames5 6Dimensions of flange-mounted frames7 7Dimensions of skirt-mounted frames8 8Dimensions of face-flange frames10 9Dimensions of large foot-m
8、ounted frames12 10Dimensions of pad-mounted or rod-mounted frames12 11Dimensions of slide rails13 Figure 1 Indicator mounting for measurement of spigot run-out and shaft extension run-out1 Figure 2 Indicator mounting for measurement of squareness of mounting face of flange to shaft2 Figure 3 Symbols
9、 for shaft end dimensions2 Figure 4 Symbols for foot-mounted machines6 Figure 5 Symbols for flange-mounted machines8 Figure 6 Symbols for skirt-mounted machines10 Figure 7 Symbols for face-flange mounted machines11 Figure 8 Symbols for pad-mounted or rod-mounted machines14 Figure 9 Symbols for slide
10、 rails15 Table 1 Dimensions of shaft ends and keyways3 Table 2 Dimensions of single tapped hole in shaft extension4 Table 3 Dimensions of two tapped holes in shaft extension4 Table 4 Fixing dimensions of foot-mounted frames, all enclosures5 Table 5 Fixing dimensions of foot-mounted frames, ventilate
11、d enclosure, for d.c. machines6 Table 6 Fixing dimensions of flange-mounted frames, enclosure D7 Table 7 Fixing dimensions of flange-mounted frames, enclosure C8 Table 8 Fixing dimensions of skirt-mounted frames, enclosure D9 Table 9 Fixing dimensions of skirt-mounted frames, enclosure C9 Table 10 F
12、ixing dimensions of face-flange frames, enclosures C and D11 Table 11 Preferred fixing dimensions for large horizontal shaft motors with high shaft centres12 Table 12 Preferred fixing dimensions for large horizontal shaft motors with low shaft centres13 Table 13 Fixing dimensions of pad-mounted or r
13、od-mounted frames, enclosure D13 Table 14 Standard dimensions of slide rails14 Table 15 Dimension AT for fabrication15 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:50:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4999-141:1987 ii BSI 02-1999
14、Foreword This Part of BS 4999 has been prepared under the direction of the Power Electrical Engineering Standards Committee and supersedes BS 4999-10:1976, which is withdrawn. This Part has been issued to implement the decision to renumber all the Parts of BS 4999 to bring the Part numbers more into
15、 line with those of IEC Publication 34. In addition to the renumbering of the Part, the inclusion of the Part number in the point numbering system adopted in Part 10, has been abandoned. No technical changes have been made to the text of BS 4999-10:1976. This Part of BS 4999 is compatible with IEC P
16、ublications 72 and 72A. 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
17、This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 16, 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. L
18、icensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:50:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4999-141:1987 BSI 02-19991 1 Scope This Part of this British Standard gives dimensions applicable to rotating electrical machines and is compatible with IEC Publications 72 and 72A. A series
19、of frame sizes up to 400 mm centre height is defined by association of dimensions. These frame sizes are intended primarily for low voltage induction motors but may be used for a variety of types of machine. For large machines from 355 mm centre height upwards, the tables give a number of preferred
20、values from which selection can be made to give the combination necessary for effective design. Dimensions are given for a limited range of slide rails. 2 References The titles of the standards publications referred to in this standard are listed on the inside back cover. 3 General 3.1 Tolerances. W
21、here tolerance grades are quoted, they have the meanings defined in BS 4500. 3.2 Run-outs. Where appropriate, shaft extension and spigot run-outs and the squareness of the flange face to the shaft shall not exceed the values specified in Table 1, Table 6, Table 7, Table 8, Table 9 and Table 10. Meas
22、urements shall be made in accordance with 3.2.1, 3.2.2 and 3.2.3. 3.2.1 Shaft extension run-out. To measure the run-out with rotation of the shaft, the point of the indicator shall be applied on the shaft midway along its length E. The maximum and minimum values on the indicator shall be read throug
23、h one slow revolution of the shaft avoiding the keyway; the difference between the values shall be taken as the full indicator measurement1). The indicator shall be mounted as shown in Figure 1. 3.2.2 Spigot run-cut. To measure the run-out the indicator shall be fixed rigidly on the shaft extension
24、by means of a device similar to that shown in Figure 1 at a distance of about 10 mm from the flange face. The maximum and minimum values on the indicator shall be read through one slow revolution of the shaft; the difference between the values shall be taken as the full indicator measurement. NOTEIt
25、 is recommended that the test should be carried out on the machine set up with shaft vertical to make the measurement free from the effects of gravity. 3.2.3 Squareness of mounting face of flange to shaft. To measure the run-out the indicator shall be fixed rigidly on the shaft extension by means of
26、 a device similar to that shown in Figure 2 at a distance of about 10 mm from the flange face. The maximum and minimum values on the indicator shall be read through one slow revolution of the shaft; the difference between the values shall be taken as the full indicator measurement. NOTEIt is recomme
27、nded that the test should be carried out on the machine set up with shaft vertical to eliminate the effects of axial clearance in the bearings. 1) This term is synonymous with total indicator reading (t.i.r.). Figure 1 Indicator mounting for measurement of spigot run-out and shaft extension run-out
28、Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 01:50:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4999-141:1987 2 BSI 02-1999 4 Shaft end dimensions Motors shall have shaft dimensions as specified in the appropriate line in Table 1. The significance of the symbols is illustrated by Figur
29、e 3. Each size of shaft is identified by a shaft number in the first column and the number is the nominal diameter of the shaft in millimetres. The keyway corner radius shall be in accordance with the following dimensions, which are abstracted from BS 4235-1. 4.1 When a single tapped hole is require
30、d in the shaft extension, the dimensions of the hole shall be in accordance with Table 2. The depth of thread shall be not less than 1.5 diameters, and there shall be a 60 angle at the centre. In special cases when the purchaser wishes to specify two tapped holes in the shaft extension, as an altern
31、ative to the single tapped hole, the dimensions of the holes shall be in accordance with Table 3. The depth of thread shall be not less than 1.75 diameters. NOTE 1The provision of a tapped hole or holes is primarily for the attachment of shaft fitments including couplings, and is not intended for th
32、e attachment of devices for lifting or handling either the motor or the rotor. NOTE 2The dimensions DH are selected from BS 3643-2 with tolerance class 6H. Figure 2 Indicator mounting for measurement of squareness of mounting face of flange to shaft Shaft numberRadius max.Radius min. 9 to 11 inclusi
33、ve 14 to 28 inclusive 32 to 65 inclusive 70 to 110 inclusive 120 to 150 inclusive mm 0.16 0.25 0.40 0.60 1.0 mm 0.08 0.16 0.25 0.40 0.70 NOTEThese symbols are selected from those given in BS 4999-103 and are those affecting interchangeability. Figure 3 Symbols for shaft end dimensions Licensed Copy:
34、 sheffieldun sheffieldun, na, Fri Dec 01 01:50:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4999-141:1987 BSI 02-19993 Table 1 Dimensions of shaft ends and keyways All dimensions are in millimetres. Shaft number Diameter DLength E Limit of shaft extension run-out (note 1) Width of keyway FGED (m
35、in.) NominalToleranceNominalToleranceNominalTolerance 99j6+ 0.007 0.002 200.033N9 0.004 0.029 7.2+ 0 0.1 8 1111j6+ 0.008 0.003 230.0354N9+ 0 0.030 + 0 0.1 10 1414j6+ 0.008 0.003 300.0355N9+ 0 0.030 + 0 0.1 14 1919j6+ 0.009 0.004 400.046N9+ 0 0.030 15.5+ 0 0.2 25 2222j6+ 0.009 0.004 500.046N9+ 0 0.03
36、0 18.5+ 0 0.2 32 2424j6+ 0.009 0.004 500.048N9+ 0 0.036 20.0+ 0 0.2 32 2828j6+ 0.009 0.004 600.048N9+ 0 0.036 24.0+ 0 0.2 40 3232k6+ 0.018 + 0.002 800.0510N9+ 0 0.036 27.0+ 0 0.2 56 3838k6+ 0.018 + 0.002 800.0510N9+ 0 0.036 33.0+ 0 0.2 56 4242k6+ 0.018 + 0.002 1100.0512N9+ 0 0.043 37.0+ 0 0.2 80 484
37、8k6+ 0.018 + 0.002 1100.0514N9+ 0 0.043 42.5+ 0 0.2 80 5555m6+ 0.030 + 0.011 1100.0616N9+ 0 0.043 49.0+ 0 0.2 80 6060m6+ 0.030 + 0.011 1400.0618N9+ 0 0.043 53.0+ 0 0.2 110 6565m6+ 0.030 + 0.011 1400.0618N9+ 0 0.043 58.0+ 0 0.2 110 7070m6+ 0.030 + 0.011 1400.0620N9+ 0 0.052 62.5+ 0 0.2 110 7575m6+ 0.
38、030 + 0.011 1400.0620N9+ 0 0.052 67.5+ 0 0.2 110 8080m6+ 0.030 + 0.011 1700.0622N9+ 0 0.052 71.0+ 0 0.2 140 8585m6+ 0.035 + 0.013 1700.0722N9+ 0 0.052 76.0+ 0 0.2 140 9090m6+ 0.035 + 0.013 1700.0725N9+ 0 0.052 81.0+ 0 0.2 140 9595m6+ 0.035 + 0.013 1700.0725N9+ 0 0.052 86.0+ 0 0.2 140 Licensed Copy:
39、sheffieldun sheffieldun, na, Fri Dec 01 01:50:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4999-141:1987 4 BSI 02-1999 Table 1 Dimensions of shaft ends and keyways Table 2 Dimensions of single tapped hole in shaft extension Table 3 Dimensions of two tapped holes in shaft extension All dimensions
40、 are in millimetres. Shaft number Diameter DLength E Limit of shaft extension run-out (note 1) Width of keyway FGED (min.) NominalToleranceNominalToleranceNominalTolerance 100100m6+ 0.035 + 0.013 2100.0728N9+ 0 0.052 90.0+ 0 0.2 160 110110m6+ 0.035 + 0.013 2100.0728N9+ 0 0.052 100+ 0 0.2 160 120120m
41、6+ 0.035 + 0.013 2100.0732N9+ 0 0.062 109.0+ 0 0.2 160 125a125m6+ 0.040 + 0.015 2100.0732N9+ 0 0.062 114.0+ 0 0.2 160 130130m6+ 0.040 + 0.015 2500.0732N9+ 0 0.062 119.0+ 0 0.2 200 140140m6+ 0.040 + 0.015 2500.0736N9+ 0 0.062 128.0+ 0 0.3 200 150150m6+ 0.040 + 0.015 2500.0736N9+ 0 0.062 138.0+ 0 0.3
42、200 NOTE 1The limits of shaft extension run-out apply only to flange-mounted and skirt-mounted motors and refer to the full indicator measurement at a point mid-way along the shaft extension E. NOTE 2The parallelism tolerance is the permitted difference in height above the base plane of two points o
43、n the axis of the shaft. The difference should be less than 0.1 mm per 100 mm of shaft length between the two points. If it is desired to limit the parallelism tolerance to a lower value, special agreement should be made. NOTE 3When using indirect drives such as belts, ropes and pinions to couple mo
44、tors to their loads, there is a danger that excessive stress may be imposed on the motor shafts and bearings by the side loading inherent in these methods of power transmission. It is advisable to consult the motor manufacturer when such drives are being designed, particularly for the larger motors
45、having shaft number 48 or greater. NOTE 4For shafts larger than 90 mm diameter, users may require shafts shorter than those listed in this table. In such cases it is recommended that the length should be in accordance with the short series of Table 1 in BS 4506:1970. F and G should remain unchanged,
46、 but ED reduced as appropriate. a This is a non-preferred ISO size. Diameter of shaft DTapped hole diameter DH mm 9 10 13 16 21 24 30 38 50 85 mm 43 55 70 75 80 95 110 125 140 mm 55 70 75 80 95 110 125 140 150 M12 M12 M12 M16 M16 M20 M20 M24 M24 mm 30 35 45 45 55 65 70 70 80 Licensed Copy: sheffield
47、un sheffieldun, na, Fri Dec 01 01:50:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 4999-141:1987 BSI 02-19995 5 Dimensions of foot-mounted frames Frames shall conform to the dimensions given in Table 4 or Table 5. The significance of the symbols is illustrated in Figure 4. Table 4 applies primari
48、ly to low voltage a.c. induction motors. Table 5 applies to foot-mounted d.c. machines. 5.1 The terminal box shall be situated with its centre line within a sector ranging from the top to 10 below the horizontal centre line of the motor, on the right-hand side when looking at the driving end. The pr
49、eferred position for frames 80 and above is on or about the horizontal centre line. Table 4 Fixing dimensions of foot-mounted frames, all enclosures All dimensions are in millimetres. Frame numberHABC Kb Fixing bolt or screw NominalNegative tolerancea 56560.59071365.8M5 63630.510080407M6 71710.511290457M6 80800.51251005010M8 90S 90L 90 90 0.5 0.5 140 140 100 125 56 56 10 10 M8 M8 100S 100