SAE ARP 4835-2006 Aerospace Fluid Power-Hydraulic Thermal Expansion Relief Valves《飞机液压动力热释放阀门》.pdf
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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 2006 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 ARP4835 AEROSPACE RECOMMENDED PRACTICE Issued 2006-09 Aerospace Fluid Power-Hydraulic Thermal Expansion Relief Valves RATIONALE This document was developed to assist the system designer in specifying the requirements
5、 for thermal relief valves that prevent the development of excessive pressure due to the thermal expansion of confined fluid. 1. SCOPE This SAE Aerospace Recommended Practice (ARP) establishes the general requirements for hydraulic thermal expansion relief valves used in aircraft and missile hydraul
6、ic systems having operating pressures and temperatures as identified in 1.2. 1.1 Purpose This document is intended for use in conjunction with a procurement specification to be prepared by the purchaser in which valve configuration, system fluid and other parameters for the particular application ar
7、e defined as required herein. 1.2 Classification The thermal relief valve shall be of classes and types based on the applicable system operating temperature and pressure. In addition, valves shall be classified by subtype based on fluid compatibility. The valves may be further classified by mounting
8、 style and size/flow rating. See Table 1 for the various classes, types, styles and sizes of thermal relief valves. SAE ARP4835 - 2 - TABLE 1 - CLASSIFICATION OF THERMAL RELIEF VALVES Class System Operating Pressure psi (MPa) 1500 3000 4000 5000 8000 1500 (10.3) 3000 (20.7) 4000 (27.6) 5000 (34.5) 8
9、000 (55.2) Type Temperature Range F (C) I II III IV -65 to +160 -65 to +275 -65 to +450 -40 to +250 (-54 to + 71) (-54 to +135) (-54 to +232) (-40 to +121) Sub Type Fluid Compatibility A B AB Petroleum and Synthetic Hydrocarbon Base (MIL-PRF-5606, MIL-PRF-83282, MIL-PRF-87257) Phosphate Ester Base (
10、AS1241) Compatible with both Subtype A Type I: 71 C (160 F), Type II: 135 C (275 F). NOTE: At manufacturers option, a performance test may be conducted following this test to verify performance before commencing the cyclic impulse test. REQUIREMENT: Flow pressure at rated flow shall not vary more th
11、an 10% from room temperature testing. Leakage shall not exceed two times the room temperature limits. 4.8.5 Endurance 4.8.5.1 Use a test setup to limit the rise rate to 140 MPa/s (20,300 psi/s). The valve shall be cycled between the peak pressure and a minimum pressure not to exceed 1 MPa (145 psi).
12、 4.8.5.2 Return pressure shall be limited to 1 MPa (145 psi) unless otherwise specified in the procurement specification. Minimum peak pressure shall be 135% of the pressure class of the valve as identified in Table 1. 4.8.5.3 A minimum of 4000 cycles shall be run at maximum temperature per Table 1.
13、 4.8.5.4 After every 4000 cycles, rerun flow pressure, repeatability, and reseat tests per 4.8.3 and examine the component under a microscope and note any damage. If any part appears to have failed, discontinue testing. 4.8.5.5 Continue testing until the thermal relief has been cycled 20,000 times.
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- SAEARP48352006AEROSPACEFLUIDPOWERHYDRAULICTHERMALEXPANSIONRELIEFVALVES 飞机 液压 动力 释放 阀门 PDF

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