SAE AS 5467-2016 General Requirements for Hydraulic Fuse - Flow Rate.pdf

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 theref

2、rom, 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 2016 SAE InternationalAll rights reserved. No part of this publi

3、cation 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: +1 724-776-4970 (out

4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/AS5467AEROSPACESTANDARDAS5467Issued 2016-01General Requirements for Hydraulic Fuse - Flow Rat

5、eRATIONALECurrently, there is no standard for hydraulic fuses that close when sensing excessive flow rate, although these devices are used in aerospace hydraulic systems. This document has been written to provide a standard to address this need.TABLE OF CONTENTS1. SCOPE 31.1 Product Classification 3

6、1.1.1 Types. 31.1.2 Classes 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 . 43.1 General Design Requirements 43.1.1 Standard Hydraulic Component Requirements. 43.1.2 Hydraulic Fluid. 43.1

7、.3 Identification and Marking . 53.2 Specific Design Requirements 53.2.1 Functional 53.2.2 Performance 53.2.3 Physical . 73.2.4 Structural. 73.2.5 Environmental . 84. QUALITY ASSURANCE PROVISIONS 84.1 General 84.1.1 Test Requirements and Options . 84.1.2 Classification of Tests . 84.2 Acceptance Tes

8、ts 84.2.1 Examination of Product . 84.2.2 Proof Pressure Test 84.2.3 Pressure Drop Test. 94.2.4 Internal Leakage Test . 94.2.5 Minimum Flow Test. 9SAE INTERNATIONAL AS5467 Page 2 of 124.2.6 Reset Test. 94.2.7 Closing Time Test . 94.2.8 Manual Bypass Test 94.3 Qualification Tests. 104.3.1 Qualificati

9、on Unit Inspection 104.3.2 Qualification Unit Functional Check 104.3.3 Weight. 104.3.4 Extended Minimum Flow Test. 104.3.5 Temperature Test 104.3.6 Operating Attitude Test . 114.3.7 Endurance Test. 114.3.8 Pressure Impulse Test 114.3.9 Altitude 114.3.10 Mechanical Shock . 114.3.11 Vibration 114.3.12

10、 Icing. 124.3.13 Rain. 124.3.14 Humidity 124.3.15 Fungus 124.3.16 Salt Spray 124.3.17 Sand and Dust. 124.3.18 Burst Pressure Test 125. PREPARATION FOR DELIVERY . 126. NOTES 126.1 Revision Indicator 12FIGURE 1 CLOSING FLOW REQUIREMENTS 6FIGURE 2 TEST SETUP 9TABLE 1 CLOSING FLOW RATES . 6TABLE 2 TEMPE

11、RATURE TEST TEMPERATURES AND PRESSURES 10SAE INTERNATIONAL AS5467 Page 3 of 121. SCOPEThis specification establishes the design, performance, and test requirements for hydraulic flow rate fuses intended to be used for hydraulic circuit protection on aircraft.1.1 Product Classification1.1.1 TypesType

12、 1 Self-Resetting without manual bypassType 2 Self-Resetting with manual bypassType 3 Non Self-Resetting1.1.2 ClassesClass 1500 1500 psi (10345 kPa) nominal system pressureClass 3000 3000 psi (20690 kPa) nominal system pressureClass 4000 4000 psi (27580 kPa) nominal system pressureClass 5000 5000 ps

13、i (34475 kPa) nominal system pressure2. REFERENCES2.1 Applicable DocumentsThe following publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of t

14、he 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 document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.2.1.1 SAE PublicationsAva

15、ilable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org.AS1241 Fire Resistant Phosphate Ester Hydraulic Fluid for AircraftARP1383 Aerospace - Impulse Testing of Hydraulic ComponentsARP43

16、86 Terminology and Definitions for Aerospace Fluid Power, Actuation and Control TechnologiesAS4716 Gland Design, O-ring and Other Elastomeric SealsAS4941 Aerospace - General Requirements for Commercial Aircraft Hydraulic ComponentsAS5857 Gland Design, O-ring and Other Elastomeric Seals, Static Appli

17、cationsAS8775 Hydraulic System Components, Aircraft and Missiles, General Specification ForSAE INTERNATIONAL AS5467 Page 4 of 122.1.2 U.S. Government PublicationsCopies of these documents are available online at http:/quicksearch.dla.mil.MIL-PRF-5606 Hydraulic Fluid, Petroleum Base, Aircraft and Ord

18、nanceMIL-PRF-83282 Hydraulic Fluid, Fire Resistant; Synthetic Hydrocarbon Base, Aircraft and MissileMIL-PRF-87257 Hydraulic Fluid, Fire Resistant; Low Temperature Synthetic Hydrocarbon Base, Aircraft and MissileMIL-STD-810 Environmental Test Methods and Engineering Guidelines2.1.3 Other DocumentsAva

19、ilable from RTCA, Inc., 1150 18th Street, NW, Suite 910, Washington, DC 20036, Tel: 202-833-9339, www.rtca.org.RTCA/DO-160 Environmental Conditions and Test Procedures for Airborne Equipment2.2 DefinitionsHYDRAULIC FLOW RATE FUSE: A Flow Rate Hydraulic Fuse is a hydraulic component that will only pe

20、rmit up to a defined flow rate of fluid through it in a single operation. If this defined flow rate of fluid passes through the fuse, it will close, thereby isolating the pipeline downstream of it.NOTE: Hydraulic Flow Rate Fuses are sometimes referred to as Velocity Fuses.RATED FLOW: The rated flow

21、of the fuse is the minimum flow rate passing through the fuse above 40 q F before it closes. This is flow rate “B” in Figure 1.RESETTING: This is the means of opening the fuse after it has closed to permit the fuse to be used again. Resetting can be either automatic (self-resetting) or manual via a

22、mechanical lever.NORMAL OPERATION: The normal operation of the fuse occurs when fluid passes through the fuse at 80% of flow rate “B” of Figure 1 (see 3.2.2.2).FULL FUSING CYCLE: A full fusing cycle occurs when fluid passes through the fuse at flow rate “C” of Figure 1 and Table1 (see 3.2.2.2) until

23、 the fuse shuts off the flow then allowing the fuse to reset by either reducing the delta pressure to zero (Types 1 and 2 only) or passing fluid through the fuse in the reverse direction.For other definitions and terms refer to ARP4386.3. REQUIREMENTS3.1 General Design Requirements3.1.1 Standard Hyd

24、raulic Component RequirementsThe fuse shall meet the requirements of AS4941 for commercial applications or AS8775 for military applications.3.1.2 Hydraulic FluidThe applicable standard for the hydraulic fluid, for example, AS1241, MIL-PRF-5606, MIL-PRF-83282, or MIL-PRF-87257shall be specified by th

25、e procuring agency.SAE INTERNATIONAL AS5467 Page 5 of 123.1.3 Identification and Marking3.1.3.1 IdentificationThe identification requirements for the fuse shall be in accordance with AS4941 or AS8775 as applicable.3.1.3.2 Marking and SerializationEach fuse shall be marked and serialized in accordanc

26、e with AS4941 or AS8775 as applicable.3.1.3.3 Flow Direction MarkingAn 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 Requirements3.2.1 FunctionalThe unit shall not close until the flow rate t

27、hrough it exceeds the limit stated herein. The unit shall close within the timelimits specified herein, when subjected to the corresponding flow of that requirement.The type of fuse shall be per 1.1.1 as specified by the procuring agency.3.2.2 Performance3.2.2.1 System PressureThe system pressure sh

28、all be per 1.1.2 as specified by the procuring agency.3.2.2.2 Closing Flow RequirementsThe unit shall not shut off flow at any flow up to the minimum closing flow as defined in Figure 1 and Table 1. The ambient temperature shall be the same as the fluid temperature specified in Figure 1.The closing

29、flow 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 closing flow shall not be affected by hydraulic line size or plumbing configuration.The unit shall shut off flow in 1.5 seconds 1.0 second at

30、 a flow rate “C” in Figure 1 and Table 1.If a different shutoff flow rate than listed is desired the procuring agency shall have the option of specifying unique parameters.SAE INTERNATIONAL AS5467 Page 6 of 12Figure 1 - Closing flow requirementsTable 1 - Closing flow ratesRated FlowGPM (LPM)Flow Rat

31、e - GPM (LPM)A B C5 ( 18.9) 2 ( 7.6) 5 ( 18.9) 7 (26.5)10 ( 37.9) 4 (15.1) 10 ( 37.9) 14 (53.0)15 ( 56.8) 6 (22.7) 15 ( 56.8) 21 (79.5)20 ( 75.7) 8 (30.3) 20 ( 75.7) 28 (106)30 (113.6) 12 (45.4) 30 (113.6) 42 (159)3.2.2.3 Pressure DropThe maximum pressure drop through the unit at nominal system pres

32、sure and ambient and fluid temperature of 80 to 100 F (27 to 38 C) shall be 100 psid (690 kPad) maximum for each direction at 80% of flow rate “B” in Figure 1 and Table 1.3.2.2.4 Internal LeakageThe internal leakage of the fuse shall be as follows:a. After the fuse has closed and with return pressur

33、e applied at the inlet, the leakage at the outlet port shall not exceed:1. After a 5 second seating period - 30 drops (2 cc) per minute2. After a 2 minute seating period - 10 drops (0.67 cc) per minuteb. After the fuse has closed and with supply pressure applied at the inlet, the leakage at the outl

34、et port shall not exceed:1. After a 5 second seating period - 15 drops (1 cc) per minute2. After a 2 minute seating period - 5 drops (0.33 cc) per minuteSAE INTERNATIONAL AS5467 Page 7 of 123.2.2.5 External LeakageThere shall be no external leakage allowed under any combination of environments speci

35、fied 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.3.2.2.6 ResettingFrom the closed position, self-resetting fuses shall fully open within 10

36、 seconds when the differential pressure is 0 to 5 psid (35 kPad) without the aid of reverse flow. The unit shall not open at 40 psid (275 kPad) or greater. Non self-resetting fuses shall not self-reset upon pressure equalization.3.2.2.7 Operating AttitudeThe unit shall meet all the requirements of t

37、his standard when installed or operated in any position or plumbing configuration.3.2.2.8 Manual BypassType 2 fuses shall have a manual bypass mechanism 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

38、must shutoff within 2 seconds of being released. The maximum allowable force to activate the bypass mechanism shall be 20 pounds (89 N) or 20 inch pounds (2.26 Nm). The bypass mechanism shall be able to withstand a load of 30 pounds (133 N) or 30 inch pounds (3.39 Nm) without damage. The pressure dr

39、op through the bypass shall be 700 psid (4830 kPad) maximum at 3.0 GPM 0.3 GPM(11.34 LPM 1.1 LPM).3.2.2.9 EnduranceUnless otherwise specified by the procuring agency, the unit shall be designed to achieve an operating endurance life of 2000 full fusing cycles. For Type 2 fuses, the bypass mechanism

40、shall be designed to operate 2000 cycles.3.2.3 Physical3.2.3.1 EnvelopeThe unit shall conform to the outline dimensions, mounting dimensions, port locations, port type, port sizes and markings as specified by the procuring agency.3.2.3.2 Maximum WeightThe maximum guaranteed drip dry weight of the un

41、it shall be as specified by the procuring agency.3.2.4 Structural3.2.4.1 Proof PressureThe unit shall be designed to withstand a proof pressure as stated in AS4941 or AS8775 as applicable.3.2.4.2 Burst PressureThe unit shall be designed to withstand a burst pressure as stated in AS4941 or AS8775 as

42、applicable in all cavities with no evidence of external leakage, failure, or rupture. Permanent deformation may occur and the fuse need not operate after being subjected to burst pressure.SAE INTERNATIONAL AS5467 Page 8 of 123.2.4.3 Pressure ImpulseUnless otherwise specified by the procuring agency,

43、 the unit shall be designed to withstand 1500000 pressure impulse cycles at ambient temperature per ARP1383, Figure 1, at a rate of 1 to 2 cycles per second. 75000 of the cycles shall be with the fuse in the closed position, the outlet port open to atmosphere and a minimum of 50 psi (345 kPa) mainta

44、ined at the inlet of the fuse in order to keep the fuse from resetting. Operating pressure shall be the nominal system pressure, minimum pressure shall be 100 psi (690 kPa). An S-N curve is not required and a single specimen is permitted.No evidence of any cracks in the fuse shall occur after being

45、subjected to impulse testing.3.2.5 EnvironmentalThe fuse shall not suffer any damage, deterioration or degradation of performance except as allowed herein when subjected to any of the environmental requirements as specified in AS4941 or AS8775 as applicable.4. QUALITY ASSURANCE PROVISIONS4.1 General

46、Each unique part number shall be subjected to the testing described herein.4.1.1 Test Requirements and OptionsAppropriate testing, as outlined herein, shall be conducted to confirm the proper design and performance of the fuse. Any request for a waiver or a modification of the test requirements shal

47、l be accompanied with detailed information and the required level of justification to enable the request to be fully considered.4.1.2 Classification of TestsThe following test programs, for the purpose of demonstrating compliance of fuses with the requirements of this specification, should be classi

48、fied as follows:4.1.2.1 Acceptance These tests are performed on each fuse to demonstrate baseline performance.4.1.2.2 Qualification These tests are performed on production configuration fuses to confirm full compliance with the requirements herein. The number of test articles shall be specified by t

49、he procuring agency.4.2 Acceptance Tests Each fuse shall be subjected to the following inspections and acceptance tests.4.2.1 Examination of ProductThe unit shall be inspected to determine that mounting provisions, safety wiring, markings, and the nameplate comply with the requirements of this standard and the approved drawings.4.2.2 Proof Pressure TestWith the outlet port capped, apply pressure in accordance with 3.2.