1、BRITISH STANDARD AEROSPACE SERIES BS A328-1: 1999 ISO8399-1: 1998 Accessory drives and mounting flanges (Metric sizes) Part 1: Design criteria ICS 49.035; 49.050BSA328-1:1999 This British Standard, having been prepared under the directionof the Engineering SectorCommittee, was publishedunder the aut
2、hority ofthe Standards Committee andcomes into effect on 15 February1999 BSI05-1999 ISBN 0 580 30327 6 National foreword This British Standard reproduces verbatim ISO8399-1:1998 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committe
3、e ACE/14, Aerospace details and parts, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international an
4、d European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI
5、 Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respons
6、ible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theISO title page, page ii, pages1 to3 and a back cover. This standard has be
7、en updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSA328-1:1999 BSI 05-1999 i Contents Page National foreword Inside front cover Foreword ii 1 Sc
8、ope 1 2 Normative references 1 3 Installation and removal 1 4 Transfer tubes and locating and/or torque-reaction pins 1 5 Coupling clamps 1 6 Spline drives 1 7 Sealing 2 8 Spline lubrication 2 9 Rotation of the shaft 2 10 Agreements between manufacturers 2 11 Designation 2 Figure 1 3ii blankBSA328-1
9、:1999 ii BSI 05-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a
10、subject for which a technical committee has been established 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. ISO collaborates closely with the International Electrotechnical Commission
11、 (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International St
12、andard ISO8399-1 was prepared by Technical Committee ISO/TC20,Aerospace, Subcommittee SC12, Mechanical system parts. ISO8399 consists of the following parts, under the general title Aerospace Accessory drives and mounting flanges (Metric series): Part 1: Design criteria; Part 2: Dimensions. Descript
13、ors: Aircraft industry, mechanical drives, gear boxes, accessories, retaining flanges, design, specifications, designation.BSA328-1:1999 BSI 05-1999 1 1 Scope This part of ISO8399 establishes the design criteria for accessory drives and mounting flanges with quick attach/detach provisions primarily
14、intended for use in aircraft gearboxes or engine accessories. NOTESome design criteria are subject to agreement between the engine/gearbox manufacturer and the accessory manufacturer (see clause10). 2 Normative references The following standards contain provisions which, through reference in this te
15、xt, constitute provisions of this part of ISO8399. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO8399 are encouraged to investigate the possibility of applying the most recent editions of the s
16、tandards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO3601-1:1988, Fluid systems Sealing devices O-rings Part1: Inside diameters, cross-sections, tolerances and size identification code. ISO4156:1981, Straight cylindrical involute splines
17、Metric module, side fit Generalities, dimensions and inspection. ISO8399-2:1998, Aerospace Accessory drives and mounting flanges (Metric series) Part2: Dimensions. ISO9214:, Aerospace V-retainer clamps for accessory drives and mounting flanges Geometrical configuration and dimensions 1) . ISO13715:1
18、994, Technical drawings Corners Vocabulary and indication on drawings. 3 Installation and removal 3.1 In order to facilitate installation, the protrusion length of the splined drive shall be such that the splines are engaged by at least5mm before the transfer tube or locating pin becomes engaged in
19、their respective housings. 3.2 It shall be possible to remove the accessories while the engine or gearbox remains installed. 4 Transfer tubes and locating and/or torque-reaction pins 4.1 All transfer tubes and locating pins shall be retained in the accessory flange. The accessory flange manufacturer
20、 is responsible for the method of retention and supply of transfer tubes or locating pins. 4.2 Transfer tubes or locating pins shall accept torque reaction. If other devices are necessary, they shall be defined by agreement between the engine/gearbox manufacturer and the accessory manufacturer. The
21、use of transfer tubes for torque reaction shall be limited to those applications where fluid flows, fluid pressure and reaction torque requirement are minor. 5 Coupling clamps Specifications relating to coupling clamps are dealt with in ISO9214. The space envelope of coupling clamps and the correspo
22、nding accessibility required for their installation shall be taken into account. 6 Spline drives 6.1 The accessory shall be driven by an involute drive spline. The dimensions of the shaft and splines shall be as specified in ISO4156 and ISO8399-2. The spline length shall be as specified in ISO8399-2
23、. Corners are indicated in Figure1 in accordance with ISO13715. 6.2 The accessory is provided with a drive shaft with radial clearance. 6.3 The accessory shall be capable of being operated satisfactorily with the pitch diameter of the spline on its input shaft displaced by a maximum of0,15mm from th
24、e spigot diameter. 1) To be published.BSA328-1:1999 2 BSI 05-1999 Deviation from squareness caused by a maximum displacement of0,15mm, in any direction, of the drive shaft axis with respect to the axis defined by the bearing face and the spigot diameter shall not exceed3l/100 (in accordance with Fig
25、ure 1). 7 Sealing 7.1 Sealing rings with dimensions as specified in ISO3601-1 shall be used for the sealing of transfer tubes and spigots. The sealing ring size and material shall be selected by the engine/gearbox manufacturer. 7.2 If it is likely that oil leakage from the accessory onto the interfa
26、ce cavity may occur, the leakage shall not exceed a rate of2ml/h and if necessary the accessory shall be provided with the means for draining the engine or gearbox cavity. 7.3 Leakage from the drive shaft seal into the interface cavity shall not exceed2ml/h. 7.4 No provision for oil recovery or reci
27、rculation in the event of excessive leakage is specified for accessories in accordance with ISO8399. However, should a draining device prove to be necessary, it shall be subject to agreement between the engine/gearbox manufacturer and the accessory manufacturer. 7.5 Seals shall be compatible with al
28、l fluid types present in the engine or gearbox cavity. 8 Spline lubrication Arrangements concerning the lubrication of splines shall be subject to agreement between the engine/gearbox manufacturer and the accessory manufacturer. 9 Rotation of the shaft The rotation of the shaft shall be defined as v
29、iewed looking at the bearing face (in accordance with Figure 1) and shall be indicated by one of the following markings: clockwise: CW counter-clockwise: CCW 10 Agreements between manufacturers The following design criteria shall be subject to agreement between the engine/gearbox manufacturer and th
30、e accessory manufacturer: a) angular spacing of oil transfer tubes or locating pins; b) requirements relating to torque reaction by other devices, if necessary (in accordance with4.2); c) arrangements for lubricating the spline drive (in accordance with clause8); d) the method for preventing drive o
31、verload; e) the location, in either the accessory or the drive, of the accessory/drive interface cavity (in accordance with7.4). 11 Designation Accessory drive and mounting flanges shall be designated by the identity block as shown in the following example EXAMPLEBSA328-1:1999 BSI 05-1999 3 Figure 1
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