SAE-AIR-560C-1999-R2007.pdf
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1、AEROSPACE INFORMATION REPORT AIR560 REV. C Issued1957-08 Revised1999-12 Superseding AIR560B Missile Hydraulic Pumps 1.SCOPE: 1.1Missile pumps are categorized by a moderate testing life and a relatively short operational service life. Generally, the pumps are operated at higher speeds, temperatures,
2、and pressures than those used in manned aircraft systems, yet reliability must be extremely high, since there rarely is a redundant system aboard the missile. Due to the short but critical life and performance requirements, development, reliability and acceptance testing should be focussed on elimin
3、ating infant mortality failures. 1.2Missile pumps must be compatible with very severe environmental conditions during the service life. In general, the temperature, vibration, shock, and acceleration encountered are more severe than those met in manned aircraft. 1.3This SAE Aerospace Information Rep
4、ort (AIR) will be confined to describing missile environments and pump usage that differ significantly from those normally encountered in manned aircraft. Since missile pumps are usually driven by a secondary power source, and since this AIR is intended for use by systems designers, as well as pump
5、designers, a brief description of some of these sources and some potential problem areas associated with each are included for reference. A more detailed treatment of auxiliary power sources can be found in AIR744. 1.4Detailed test requirements are not included in this AIR since a wide variation exi
6、sts between those operating conditions and environments that might be encountered on an air-to-air missile, hung beneath the wing of a fighter aircraft, and that of an ICBM (Intercontinental Ballistic Missile), launched from an environmentally controlled silo. Missile pumps frequently have their gen
7、esis in standard aircraft pumps, however, what distinguishes them from manned aircraft pumps is that they are usually operated outside of, or at the extreme of their long-life design parameters. Therefore, if a new design pump is being proposed for a missile application, environmental conditions ref
8、erenced in this AIR should be considered, as opposed to long-life operation and environmental requirements of a manned aircraft, engine-driven pump. Reaffirmed 2007-07 RATIONALE This document has been reaffirmed to comply with the SAE 5-Year Review policy. SAE Technical Standards Board Rules provide
9、 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 therefrom, is the sole responsibility of the user.
10、” 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 2007 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval syste
11、m 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) Fax: 724-776-0790 Email: CustomerServicesae.
12、org SAE WEB ADDRESS: http:/www.sae.org Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:24:53 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AIR560 Revision C - 2 - 1.4 (Continued): A
13、ppendix A is intended to indicate typical environments for several different types of missiles. The actual requirements for a given system should be used and specified in the detailed specification. 1.5Purpose: 1.5.1This AIR delineates those factors in which the requirements of hydraulic pumps for u
14、se in missiles differ from the requirements of hydraulic pumps for use in manned aircraft. 1.5.2It is intended that this AIR shall alert both the pump designer and systems designer to these differences and thus achieve lighter, simpler and more reliable hydraulic pumps which are particularly suited
15、for missile use. 2.REFERENCES: 2.1SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. ARP598Determination of Particulate Contamination in Liquids by the Particle Count Method AIR744Aerospace Auxiliary Power Sources AIR974Long-Term Storage of Missile Hydraulic Sys
16、tems AS4059Aerospace - Cleanliness Classification for Hydraulic Fluids AS5440Hydraulic Systems, Aircraft, Design and Installation, Specifications For AS19692Pump Units, Hydraulic, Variable Delivery, General Specification For 2.2U.S. Government Publications: Available from DODSSP, Subscription Servic
17、es Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. MIL-STD-461ERequirements for the Control of Electromagnetic Interference Characteristics of Subsystems and Equipments MIL-STD-810Environmental Test Methods and Engineering Guidance 3.REQUIREMENTS: 3.1Materials: 3.1.1All materials
18、 shall be carefully chosen for chemical and dimensional stability when subjected to extremes of temperature and varieties of hydraulic fluids. 3.1.1.1The choice and installation of elastomeric materials are particularly strongly affected by ranges of temperature and pressure and the chemical nature
19、of the hydraulic fluid. Careful attention must be paid to the requirements of the detailed specification. Copyright SAE International Provided by IHS under license with SAELicensee=Defense Supply Ctr/5913977001 Not for Resale, 12/04/2007 20:24:53 MSTNo reproduction or networking permitted without li
20、cense from IHS -,-,- SAE AIR560 Revision C - 3 - 3.1.1.2Chemically active materials such as cadmium, zinc, and silver whose reactions with other materials are accelerated by high operating temperatures shall not be used in contact with the operating fluid. In elevated temperature applications (fluid
21、 or ambient), consideration should also be given to the stress alloying with steel components. In particular, cadmium shall not be used at temperatures conducive to stress alloying of steel parts. 3.2Design and Construction: 3.2.1All dynamic spring-mass systems in the pumps shall be damped to an ext
22、ent that assures no adverse operation under the specified vibrational requirements. Insure that acceleration forces will not adversely affect the compensator control (variable pumps). 3.2.2All compliant members shall be chosen, designed, or installed such that any changes in strength and/or modulus
23、of elasticity caused by changes in the temperature environment will not affect the operating characteristics of the pump. 3.2.3Insofar as possible, the pump design shall minimize the effect on performance resulting from changes in fluid viscosity, density, and compressibility caused by changes in te
24、mperature. 3.2.4If cooling circulation ports are used, the flow passages in the pump should be designed so that they will not add additional pressure drop (heat) in the circulation process. In applications where the pump is contained in a reservoir, the reservoir shall be capable of heat radiation.
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