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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2009 SAE International All rights reserved. No part of this publication m
3、ay 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: 724-776-4970 (outside USA)
4、 Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SURFACE VEHICLE RECOMMENDED PRACTICE J1598 MAY2009 Issued 1988-07 Revised 2009-05 Superseding J1598 DEC1999 Laboratory Testing of Vehicle and Industrial Heat Exchangers for Durability Under Vibration-Induced Loading
5、RATIONALE This document has been converted to Word format and corrections have been made to spelling, punctuation, and grammar. SAE J2679, Charge Air Cooler Leakage, has been added to the list of applicable publications in section 2.1.1 and it has been specified in section 5.7 as the method of deter
6、mining leaks in charge air coolers. A suggestion to filter road cycle data has been added to section 5.3.1 to reduce test time. 1. SCOPE This SAE Recommended Practice is applicable to all liquid-to-gas, liquid-to-liquid, gas-to-gas, and gas-to-liquid heat exchangers used in vehicle and industrial co
7、oling systems. This document outlines the test to determine durability characteristics of the heat exchanger from vibration-induced loading. 1.1 Purpose This document provides a test guideline for determining the durability of a heat exchanger under specified vibration loading. 2. REFERENCES 2.1 App
8、licable Publications The following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside US
9、A and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1542 Laboratory Testing of Vehicle and Industrial Heat Exchangers for Thermal Cycle Durability SAE J1597 Laboratory Testing of Vehicle and Industrial Heat Exchangers for Pressure-Cycle Durability SAE J2679 Charge Air Cooler Leakage Copyr
10、ight SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J1598 Revised MAY2009 Page 2 of 4 3. OBJECTIVE To verify compliance with established criteria that insures durability in a specific application. This do
11、cument describes a system to induce stresses in a heat exchanger resulting from vibration loading. The process is accomplished by vibrating the unit at specified frequencies, and amplitudes or at specified frequencies and acceleration. 4. FACILITY REQUIREMENT The facility should provide the followin
12、g as required: 4.1 Vibration equipment with controls on frequency, amplitude, and acceleration (for 50 Hz and below, electrohydraulic is suggested, higher frequencies may require electrodynamic). 4.2 Test Fixture 4.2.1 Actual Installation 4.2.2 If actual installation is not available, a fixture shou
13、ld support the heat exchanger with orientation as in service or as specified. The fixture must be rigid so as not to induce any additional dynamic inputs. 4.3 Means of checking heat exchanger integrity. 4.4 Equipment to monitor motion of unit during test. 4.5 Source for pressurizing and heating test
14、 unit if required. 4.6 Additional equipment may include but not be limited to the following: a. Accelerometers b. Automatic data logging equipment c. Automatic emergency shutdown d. Cycle counters e. Digital signal analyzer f. Function generator (sine wave, random noise, square wave, ramp function,
15、etc.) g. Load transducers h. Pressure gauges i. Pressure regulators j. Road data recording equipment k. Safety features as specified by regulatory codes and common practices l. Strain measurement equipment m. Temperature monitoring and control equipment 5. TESTING 5.1 Test heat exchanger for integri
16、ty. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J1598 Revised MAY2009 Page 3 of 4 5.2 Install test unit on vibration test fixture, fill with specified test fluid, orientation the same as in s
17、ervice or as specified, and to include all mounting hardware: isolators, tie rods, mounting brackets, etc. All heat exchanger mounted masses will affect the response characteristics of the test unit and should be attached. Examples of mounted masses for a radiator are: charge air cooler, condensers,
18、 oil cooler, air dryers, shrouds, shutter, etc. 5.3 Set up control system to obtain the specified vibration cycle under one of the following modes: 5.3.1 Road or duty cycle (simulation or replication). It may be desirable to filter road cycle data to remove non damaging portions of the drive event (
19、smooth road for example) to reduce overall test time. 5.3.2 Failure mode simulation. 5.3.3 Sine sweep at specified acceleration or amplitude. 5.3.4 Resonant frequency at specified energy input. 5.3.5 Random noise at specified acceleration levels. 5.3.6 Per established specification. 5.4 Pressurize a
20、nd heat the test unit if required. CAUTION: Pressures exceeding specified maximum value can cause significant structural damage which will invalidate the test results. The system shall be capable of maintaining this pressure within 5% absolute pressure unless otherwise specified and should be measur
21、ed within or as near the test units a possible. 5.5 Run test to specified duration or component failure. 5.6 Remove and test heat exchanger for leaks and structural damage. Methods described in SAE J2679, Charge Air Cooler Leakage, should be used for air-to-air charge air coolers to determine if pos
22、t test leakage is acceptable. 6. TEST DOCUMENTATION 6.1 During and after test, document leakage rate(s), location(s), and structural failures for comparison to acceptance criteria. Methods described in SAE J2679, Charge Air Cooler Leakage, should be used for air-to-air charge air coolers to determin
23、e if post test leakage is acceptable. 6.2 Document the following: a. Condition of unit prior to test (new or previous history) b. Unit Orientation (Reference to 5.2) c. Test Mode (Reference to 5.3) d. Pressure and Temperature (Reference to 5.4) e. Duration of Test (Reference to 5.5) f. Location of l
24、eaks and structural damage (Reference to 5.6) 6.3 Testing should be adequately documented to allow test reproduction. Documentation to include a test log of the complete test, recording any changes in the heat exchanger and fixture. Test log to include cycles or hours, time of day for all test start
25、s and stops with reasons for stops. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J1598 Revised MAY2009 Page 4 of 4 7. This document is valid for durability comparison of vibration induced load
26、ings. Correlation to field results must be developed on an individual basis. Other tests affecting heat exchanger durability are SAE J1542 (Thermal Cycle) and SAE J1597 (Pressure Cycle). These tests can be run in combination as well as independently. NOTE: Combination testing may make it difficult t
27、o determine cause of failure. 8. NOTES 8.1 Marginal Indicia A change bar (I) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the docum
28、ent 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 COOLING SYSTEMS STANDARDS COMMITTEE Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
