1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2013 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J1308_201312 SURFACE VEHICLE RECOMMENDED PRACTICE J1308 DEC2013 Issued 1985-09 Re
5、vised 2013-12 Superseding J1308 AUG2008 Fan Guard for Off-Road Machines RATIONALE This standard is being revised to reflect the latest revision of SAE J1116 which removed Agricultural Tractors from the scope. FOREWORD This update consists of referring to the 2013 version of SAE J1116. 1. SCOPE This
6、practice applies to guarding of engine cooling fans used on Off-Road Self-Propelled Work Machines defined in SAE J1116. It does not include guarding for belts, pulleys, or other rotating equipment used on these machines. 1.1 Purpose This document provides performance guidelines for engine cooling fa
7、n guard device(s). 2. REFERENCES 2.1 Applicable Document The following publication forms a part of the specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publication Available from SAE International, 400 Commonwealth
8、Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1116 Categories of Off-Road Self-Propelled Work Machines SAE INTERNATIONAL J1308 Revised DEC2013 Page 2 of 3 3. DEFINITIONS 3.1 FAN GUARD A device to protect against inadverte
9、nt contact with a rotating fan by objects or personnel. 3.2 FAN SHROUD A device to improve the performance of a cooling fan by enclosing the blade tips. 3.3 EXPOSED AREA OF FAN The portion of the fan from the hub to the blade tips not blocked by integral components of the machine that remain in plac
10、e during maintenance or periodic inspection. 4. PERFORMANCE REQUIREMENTS 4.1 The fan guard shall cover or enclose all exposed areas of the fan blades and spider with which inadvertent contact could be made by personnel or extraneous material. 4.2 The maximum nominal width of opening in the guard sha
11、ll depend on its distance from the exposed area of the fan according to Table 1: TABLE 1 - MAXIMUM OPENING WIDTH Opening Distance From Guard to Fan 12 mm (0.47 in) Less Than 90 mm (3.54 in) 16 mm (0.63 in) 91 mm (3.58 in) to 140 mm ( 5.51 in) 19 mm (0.75 in) 141 mm (5.55 in) to 165 mm ( 6.50 in) 22
12、mm (0.87 in) 166 mm (6.54 in) to 190 mm ( 7.48 in) 32 mm (1.26 in) 191 mm (7.52 in) to 320 mm (12.60 in) 4.3 The guard shall be sufficiently rigid to retain the distances defined in 4.2 under the following conditions: 4.3.1 When subjected to a force of 800 N (179.8 lbs.) distributed over any 75 x 15
13、0 mm (2.95 x 5.90 in.) area and applied in any direction toward the fan. 4.3.2 When subjected to a force of 1100 N (247.3 lbs.) distributed over any 75 x 150 mm (2.95 x 5.90 in.) area and directed radially to the axis of the fan rotation. 4.3.3 Any surface within 20 degrees of horizontal must meet t
14、he requirements of 4.3.2. 4.4 Design Considerations 4.4.1 The fan guard shall minimize sharp edges and pinch points. 4.4.2 The guard shall be easy to remove and install with common hand tools. 4.4.3 The guard should allow belt adjustment and replacement as required and reversal of fan if needed. 4.4
15、.4 When the fan shroud or other components are used as a fan guard, they must meet fan guard performance requirements. SAE INTERNATIONAL J1308 Revised DEC2013 Page 3 of 3 5. NOTES 5.1 Marginal Indicia A change bar (I) located in the left margin is for the convenience of the user in locating areas wh
16、ere technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE OPERATOR PROTECTION TECHNICAL COMMITTEE SC1 PERSONNEL PROTECTION (GENERAL)
