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 2012 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 SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AS5466AEROSPACESTANDARDAS5466 Issued 2012-07 Aerospace - General Requirements for Hydraulic Fuse
5、 - Quantity Measuring RATIONALE Subsequent to the cancellation of MIL-F-5006, Quantity Measuring Fuse-Hydraulic, the SAE committee membership determined there was a need for a replacement specification which is presented below. TABLE OF CONTENTS 1. SCOPE 31.1 Product Classification 31.1.1 Types. 31.
6、1.2 Classes . 31.1.3 Volumetric Capacity Rating . 31.2 Envelope and Port Configuration 32. REFERENCES 32.1 Applicable Documents 32.1.1 SAE Publications . 32.1.2 U.S. Government Publications 42.1.3 Other Documents 42.2 Definitions . 43. REQUIREMENTS . 53.1 General Design Requirements 53.1.1 Standard
7、Hydraulic Component Requirements 53.1.2 Hydraulic Fluid 53.1.3 Identification and Marking . 53.2 Specific Design Requirements 53.2.1 Functional 53.2.2 Performance 53.2.3 Physical . 83.2.4 Structural . 83.2.5 Environmental . 84. QUALITY ASSURANCE PROVISIONS 84.1 General . 84.1.1 Test Requirements and
8、 Options . 84.1.2 Classification of Tests . 84.2 Acceptance Tests 94.2.1 Examination of Product . 94.2.2 Proof Pressure Test 94.2.3 Pressure Drop Test . 94.2.4 Internal Leakage Test . 104.2.5 Minimum Flow Test . 104.2.6 Reset Test . 104.2.7 Volumetric Capacity Test 104.2.8 Manual Bypass Test 10SAE A
9、S5466 Page 2 of 14 4.3 Qualification Tests . 114.3.1 Qualification Unit Inspection . 114.3.2 Qualification Unit Functional Check 114.3.3 Weight . 114.3.4 Extended Minimum Flow Test . 114.3.5 Temperature Test 114.3.6 Operating Attitude Test . 124.3.7 Endurance Test . 124.3.8 Pressure Impulse Test 134
10、.3.9 Altitude 134.3.10 Mechanical Shock . 134.3.11 Vibration 134.3.12 Icing . 134.3.13 Rain . 134.3.14 Humidity 134.3.15 Fungus 134.3.16 Salt Spray 134.3.17 Sand and Dust 134.3.18 Burst Pressure Test 144.4 Production Tests . 144.5 Quality Assurance Tests . 145. PREPARATION FOR DELIVERY . 146. NOTES
11、14FIGURE 1 VOLUMETRIC PERFORMANCE . 6FIGURE 2 TEST SETUP 10 TABLE 1 VOLUMES AND FLOWS 6 SAE AS5466 Page 3 of 14 1. SCOPE This specification establishes the design, performance, and test requirements for hydraulic quantity measuring fuses intended to be used for hydraulic circuit protection. 1.1 Prod
12、uct Classification 1.1.1 Types Type 1 - Self-Resetting without manual bypass Type 2 - Self-Resetting with manual bypass Type 3 - Non Self-Resetting 1.1.2 Classes Class 1500 - 1500 psi (10.3 MPa) nominal system pressure Class 3000 - 3000 psi (20.7 MPa) nominal system pressure Class 4000 - 4000 psi (2
13、7.6 MPa) nominal system pressure Class 5000 - 5000 psi (34.5 MPa) nominal system pressure Class 8000 - 8000 psi (55.2 MPa) nominal system pressure 1.1.3 Volumetric Capacity Rating Refer to Figure 1 and Table 1 (see 3.2.2.2). If a different volumetric capacity than listed is desired the procuring age
14、ncy shall have the option of specifying unique parameters. 1.2 Envelope and Port Configuration The procuring agency shall specify the envelope and port configuration. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this document to the extent specified herein. The la
15、test issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes precedence. Nothing in this d
16、ocument, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org
17、.AS1241 Fire Resistant Phosphate Ester Hydraulic Fluid for Aircraft ARP1383 Impulse Testing of Aerospace Hydraulic Actuators, Valves, Pressure Containers, and Similar Fluid System Components ARP4386 Terminology and Definitions for Aerospace Fluid Power, Actuation and Control Technologies AS4716 Glan
18、d Design, O-ring and Other Elastomeric Seals SAE AS5466 Page 4 of 14 AS4941 Aerospace - General Requirements for Commercial Aircraft Hydraulic Components AS5857 Gland Design, O-ring and Other Elastomeric Seals, Static Applications AS8775 Hydraulic System Components, Aircraft and Missiles, General Sp
19、ecification For 2.1.2 U.S. Government Publications Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/.MIL-PRF-5606 Hydraulic Fluid, Petroleum Base, Aircraft and
20、 Ordnance MIL-PRF-83282 Hydraulic Fluid, Fire Resistant; Synthetic Hydrocarbon Base, Aircraft and Missile MIL-PRF-87257 Hydraulic Fluid, Fire Resistant; Low Temperature Synthetic Hydrocarbon Base, Aircraft and Missile MIL-STD-130 Identification Marking of U.S. Military Property MIL-STD-810 Environme
21、ntal Test Methods and Engineering Guidelines 2.1.3 Other Documents Available from RTCA Secretariat, 44 Suite 500, 1425 K Street, NW, Washington, DC 20005, Tel: 202-833-9339, www.rtca.org.RTCA/DO-160 Environmental Conditions and Test Procedures for Airborne Equipment 2.2 Definitions QUANTITY MEASURIN
22、G HYDRAULIC FUSE: A Quantity Measuring Hydraulic Fuse is a hydraulic component that will only permit up to a defined quantity of fluid through it in a single operation. If this defined quantity of fluid passes throughthe fuse, it will close, thereby isolating the pipeline downstream of it. NOTE: Qua
23、ntity measuring hydraulic fuses are sometimes referred to as Volumetric Fuses. VOLUMETRIC CAPACITY: The volumetric capacity of the fuse is the maximum quantity of fluid through it in a single operation passing through the fuse before it closes. RESETTING: This is the means of opening the fuse after
24、it has closed to permit the fuse to be used again. Resetting can be either automatic (self-resetting) or manual via a mechanical lever. NORMAL OPERATION: The normal operation of the fuse occurs when fluid passes through the fuse at flow rate “D” of Figure 1 (see 3.2.2.2) and then stop flowing for a
25、minimum of 5 s when 70% of volume “H” in Figure 1 has passed through the fuse. FULL FUSING CYCLE: A full fusing cycle occurs when fluid passes through the fuse at a flow rate between “B” and “E” of Figure 1 (see 3.2.2.2) until the fuse shuts off the flow. Then allowing the fuse to reset by either re
26、ducing the delta pressure to zero (Types 1 and 2 only) or passing fluid through the fuse in the reverse direction. PARTIAL FUSING CYCLE: A partial fusing cycle occurs when 60 to 80% of volume “H” in Figure 1 (see 3.2.2.2) passes through the fuse at a flow rate between “C” and “D” in Figure 1. Then a
27、llowing the fuse to reset by either stopping flow for a minimum of 5 s (Types 1 and 2 only) or passing fluid through the fuse in the reverse direction. For other definitions and terms refer to ARP4386. SAE AS5466 Page 5 of 14 3. REQUIREMENTS 3.1 General Design Requirements 3.1.1 Standard Hydraulic C
28、omponent Requirements The fuse shall meet the requirements of AS4941 for commercial applications or AS8775 for military applications. 3.1.2 Hydraulic Fluid The applicable standard for the hydraulic fluid, for example, AS1241, MIL-PRF-5606, MIL-PRF-83282, or MIL-PRF-87257 shall be specified by the pr
29、ocuring agency. 3.1.3 Identification and Marking 3.1.3.1 Identification The identification requirements for the fuse shall be in accordance with AS4941 or AS8775 as applicable. 3.1.3.2 Marking and Serialization Each fuse shall be marked and serialized in accordance with AS4941 or AS8775 as applicabl
30、e. 3.1.3.3 Flow Direction Marking An arrow shall be clearly and permanently marked on the unit to indicate the direction of fusing flow. Impression stamping is not allowed. 3.2 Specific Design Requirements 3.2.1 Functional a. The unit shall measure fluid volume within a flow range and block the outl
31、et flow if the volume reaches the specified “fusing” volume. b. The type of fuse shall be per 1.1.1 as specified by the procuring agency. 3.2.2 Performance 3.2.2.1 System Pressure The system pressure shall be per 1.1.2 as specified by the procuring agency. 3.2.2.2 Volumetric Capacity The volumetric
32、capacity of the unit shall be per Figure 1 and Table 1 as specified by the procuring agency for all pressures and environmental conditions specified in 3.2.5. The volumetric capacity shall not be affected by hydraulic line size or plumbing configuration. SAE AS5466 Page 6 of 14 FIGURE 1 - VOLUMETRIC
33、 PERFORMANCE TABLE 1 - VOLUMES AND FLOWS Volumetric Capacity cu in (l) Flow Rate gpm (lpm) Passed Volume cubic inches (liters) A B C D E F G H J K L 10 (0.164) 0.02 (0.076) 0.1 (0.38) 1.0 (3.8) 5 (19) 10 ( 38) 5 (0.082) 5 (0.082) 10 (0.164) 11 (0.18) 14 (0.23) 15 (0.246) 40 (0.655) 0.02 (0.076) 0.1
34、(0.38) 1.0 (3.8) 15 (57) 30 (114) 20 (0.328) 20 (0.328) 40 (0.655) 45 (0.737) 55 (0.90) 60 (0.983) 80 (1.31) 0.02 (0.076) 0.1 (0.38) 1.0 (3.8) 20 (76) 40 (151) 20 (0.328) 40 (0.655) 80 (1.31) 90 (1.47) 110 (1.8) 120 (1.97)130 (2.13) 0.02 (0.076) 0.1 (0.38) 1.0 (3.8) 20 (76) 40 (151) 20 (0.328) 80 (1
35、.31) 130 (2.13) 145 (2.38) 185 (3.03) 200 (3.28)200 (3.28) 0.02 (0.076) 0.1 (0.38) 1.0 (3.8) 20 (76) 40 (151) 20 (0.328) 130 (2.13) 200 (3.28) 220 (3.60) 280 (4.6) 300 (4.92) 3.2.2.3 Pressure Drop The maximum pressure drop through the unit at nominal system pressure and ambient and fluid temperature
36、 of 90 F (32 C) shall be 100 psid (689 kPa) maximum for each direction at flow rate “D” in Figure 1 and Table 1. 3.2.2.4 Minimum Flow The unit shall not fuse (close) at or below flow rate “A” in Figure 1 and Table 1. Also, the unit may or may not fuse (close) between flow rates “A” and “B” in Figure
37、 1 and Table 1. The unit must fuse (close) between flow rates “B” and “E” in Figure 1 and Table 1. This requirement allows for normal system leakage to pass through the fuse without affecting volumetric performance. SAE AS5466 Page 7 of 14 3.2.2.5 Internal Leakage The internal leakage of the fuse sh
38、all be as follows: a. After the fuse has closed and with return pressure applied at the inlet, the leakage at the outlet port shall not exceed: 1. After a 5 s seating period - 30 drops (2 cc) per minute 2. After a 2 min seating period - 10 drops (0.67 cc) per minute b. After the fuse has closed and
39、with supply pressure applied at the inlet, the leakage at the outlet port shall not exceed: 1. After a 5 s seating period - 15 drops (1 cc) per minute 2. After a 2 min seating period - 5 drops (0.33 cc) per minute 3.2.2.6 External Leakage There shall be no external leakage allowed under any combinat
40、ion of environments specified herein. External leakage shall be interpreted to mean leakage to the exterior of the unit or to any cavity vented to the exterior of the unit. Wetness sufficient to form a drop shall be considered leakage. Small cross section O-ring seals - 0.070 in (1.778 mm) diameter
41、or less - shall only be used in exceptional circumstances and shall have the approval of the procuring agency. Seal squeeze should not be less than 0.005 in (0.127 mm) or 5% of seal cross section, whichever is greater. Experience has shown that deviating from these practices contributes to external
42、leakage problems. Refer to AS4716 and AS5857 for more information. 3.2.2.7 Resetting From the closed position, self-resetting fuses shall fully open within 5 s when the differential pressure is 0 to 5 psid (34 kPa) without the aid of reverse flow. The unit shall not open at 20 psid (138 kPa) or grea
43、ter. Non self-resetting fuses shall not self-reset upon pressure equalization. 3.2.2.8 Operating Attitude The unit shall meet all the requirements of this standard when installed or operated in any position or plumbing configuration. 3.2.2.9 Manual Bypass Type 2 fuses shall have a manual bypass mech
44、anism that will allow flow through the fuse when the fuse is in the closed position. The bypass mechanism shall be spring-loaded in the off position and must shutoff within 2 s of being released. The maximum allowable force to activate the bypass mechanism shall be 20 lb (89 N) or 20 in-lb (2.26 Nm)
45、. The bypass mechanism shall be able to withstand a load of 30 lb (133 N) or 30 in-lb (3.39 Nm) without damage. The pressure drop through the bypass shall be 700 psid (4826 kPa) maximum at 3.0 gpm 0.3 gpm (11.34 lpm 1.1 lpm). 3.2.2.10 Endurance Unless otherwise specified by the procurring agency, th
46、e unit shall be designed to achieve an operating endurance life of 2000 full fusing cycles and 1 000 000 partial fusing cycles. For Type II fuses, the bypass mechanism shall be designed to operate 2000 cycles. SAE AS5466 Page 8 of 14 3.2.3 Physical 3.2.3.1 Envelope The unit shall conform to the outl
47、ine dimensions, mounting dimensions, port locations, port type, port sizes and markings as specified by the procuring agency. 3.2.3.2 Maximum Weight The maximum guaranteed drip dry weight of the unit shall be as specified by the procuring agency. 3.2.4 Structural 3.2.4.1 Proof Pressure The unit shal
48、l be designed to withstand a proof pressure as stated in AS4941 or AS8775 as applicable. 3.2.4.2 Burst Pressure The unit shall be designed to withstand a burst pressure as stated in AS4941 or AS8775 as applicable in all cavities with no evidence of external leakage, failure, or rupture. Permanent de
49、formation may occur and the fuse need not operate after being subjected to burst pressure. 3.2.4.3 Pressure Impulse Unless otherwise specified by the procurring agency, the unit shall be designed to withstand 1 500 000 pressure impulse cycles at ambient temperature per ARP1383, Figure 1, at a rate of 1 to 2 cycles per second. 75 000 of the cycles shall be with the fuse in the closed position, the outlet port open to
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