欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    AECMA PREN 2624-1990 Aerospace Series Pressure Impulse Testing of Hydraulic System Components Issue P 1《航空航天系列飞机液压系统元器件压力脉冲试验》.pdf

    • 资源ID:419541       资源大小:278.42KB        全文页数:7页
    • 资源格式: PDF        下载积分:5000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要5000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    支付方式: 支付宝扫码支付    微信扫码支付   
    验证码:   换一换

    加入VIP,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。

    AECMA PREN 2624-1990 Aerospace Series Pressure Impulse Testing of Hydraulic System Components Issue P 1《航空航天系列飞机液压系统元器件压力脉冲试验》.pdf

    1、AECMA PREN262i Edition approved for publication Comments should be sent within six months after the date of publicafion decision 88, Bd. Malesherbes 20th January 1990 A.E.C.M.A. 75008 PARIS - FRANCE 90 C4 Chairman Mr. STAIB - 724 2 A .E .C, M .A. STAN DARD NORME A. E.C. M.A. A.E.C.M.A. NORM prEN 262

    2、4 Issue P 1 January 1990 DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS -TL. 45-63-82-85 UDC : Key words : ENGLISH VERSION Aerospace series Pressure impulse testing of hydraulic system components Srie arospatiale Luft- und Raumfahrt Essa

    3、i dimpulsion de pression Druckimpulsprfung des composants de systmes hydrauliques von Komponenten in Hydraulik-Anlagen This Aerospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green pape

    4、r for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shallnot be changed to an extent that interchangeability is affected, phy

    5、sically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreemenf of the Official Services of the Member countries it will be submitted as a draft European Standard to CEN (European Committee for Stand

    6、ardization) for final vote. aecma 1990 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN2b24 90 m LO123LL 0003725 4 D”FN 7674 ?ne 2 Contents 1

    7、 Scope and field of application 2 References 3 Definitions 3.1 Components 3.2 Shape of impulse trace 3.3 Rate of rise 4 Requirements 4.1 Rate of rise ,4.2 Cycling rate 4.3 Temperature 4.4 Number of cycles 4.5 Preparation of specimens 4.6 Test specimens 4b7 Test fluid 4.8 Perfomance after test 5 Test

    8、 procedure 5.1 Accuracy 5,2 Component set up 5.3 Impulse test 5.4 Component verification Figure 1 - Pressure impulse trace Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without l

    9、icense from IHS-,-,-AECMA PREN262Li 90 1012311 000372b b 1 prEN 2624 Page 3 1 This test method shall be used to vepify the structural integrity of certain Scope and field of application O - hydraulic components under pressure impulse-type loading. For the purpose of pressure impulse testing the hydr

    10、aulic system components shall be divided into passive and active components. This standard establishes the requirements and the procedures for impulse testing of passive hydraulic components only, Unless otherwise specified in the detail specification or in existing component related standards, the

    11、following procedures shall be used. Active hydraulic components shall be tested according to tailored test require- ments as specified in detail specifications. 2 References IS0 6772 , Aerospace-fluid systems- Impulse testing of hydraulic hose, tubing and fitting assemblies O 3 Definitions 3.1 Compo

    12、nents 3.1.1 Passive components Passive components are units under pressure whose impulse loading in service primarily results from pressure fluctuations in the hydraulic system. The number of cycles, the amplitudes and the wave shape of these impulses in general cannot be predicted or calculated wit

    13、h sufficient accuracy. Passive components are, for example : - “manifalds“ and fluid distribution components except lines, fittings and hoses - filter housings 3.1.2 Active components Active components are units under pressure which have to sustain (active) pressure pulses resulting from their own f

    14、unction in addition to the normal (passive) system pressure fluctuations. The active portion of the impulse loading in general can be predicted or calculated or derived from the duty cycle of the component. Active components are, for example : - flight control actuators and control components - land

    15、ing gear and other utility hydraulics - braking and nose wheel steering hydraulics O Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2624 Page 4 3

    16、.2 Shape of impulse trace When observed on an oscilloscope the impulse traces show as approximate pressure-time cycles. The dynamic cycle produced by the test machine shall be in conformance with the trace illustrated in figure 1. It is mandatory that the pressure time curve be confined to the shade

    17、d area on figure 1. 3.3 Rate of rise The rate of rise is defined as the slope of the pressure-time curve in the straight portion of the pressure increase portion. For purposes of definition, the rate of rise shall be determined between 10% of the total rise above back pressure and 10% of the total r

    18、ise below peak pressure. Sweep rate of the oscilloscope shall be adjusted so that the slope of the pressure rise shall take advantage of the full size of the screen. The trace and photos of the impulse cycle should be an accurate record of the impulse cycle and show a grid or other means to permit a

    19、ccurate checking. 4 Requirements When this EN is referenced in a design specification as part of the requirements the i-ollowing requirements shall be specified : a) Nominal system pressure b) Operating fluid and ambient temperature c) Fluid 4.1 Rate of rise The rate of pressure rise shall be less t

    20、han 1400000 kPa/a (14000 bars/) unless otherwise specified in the detail specification. 4.2 Cycling rate The cycling rate shall be between 1 cyclejs (large components) and 5 cyclesrs (small components), with the actual cyclic rate to be defined in the component detail specification. At rates higher

    21、than 1 cycle/s the component shall be instrumented to verify that intended stresses are applied. 4.3 Temperature The fluid and ambient temperature during testing shall be maintained at the nominal component operating temperature as specified in %he detail specification. Copyright Association Europee

    22、ne des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.4 Number of cycles O Unless otherwise specified in thr: detail specification, the following number of pressure impulse cycles shal

    23、l be applied as a minimum separately to both the pressure and returns (when applicable), cavities of the component. Avoid backflowing electro-hydraulic servo valves if present in the assembly under test. High pressure 300.000 cycles Low pressure 150.000 cycles See figure 1 4.5 Preparatioo of specime

    24、ns The preparation of test specimens shall be defined in the component detail specification. 4.6 Test equipment The test equipment and circuit shall produce repeatable pressure pulses within the limits defined in clause 3.2. 4.7 Test fluid The fluid used for the test shall be the service fluid of th

    25、e component undergoing the test, unless otherwise specified in the component detail specification. 4.8 Performance after test The comDonent shall conform to the performance requirements specified in the detail specification after completion of the impuise testing. 5 Test procedure This method of tes

    26、ting is intended to determine the ability of hydraulic system components to withstand hydraulic impulse for qualification testing. 5.1 Accuracy Set up and maintain .,quiPrnent accuracy so that all data are accurate within 2% of actual. 5.2 Component Set-up Bleed entrapped air from the component and

    27、test circuit being pressurised. Allow all drains and low pressure ports that are not part of tne pressure containing envelopes to drain freely and keep them at atmospheric pressure. Metal shot or loosely fitting metal pieces may be placed in the unit under test is desired tc minimize fluid volume, *

    28、 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I I AECMA PREN2b24 90 W IOI23II O003729 I prEN 2624 Page 6 e 5.3 Impulse test Conduct the impulse test

    29、 as required in clause 4 and the detail specification. 5.4 Component verification After completion of the pr !sure impulse testing, the unit shall be tested to the performance limits specified in clause 4.8. The unit shall then be disassembled and inspected for cracks or structural failure. Copyrigh

    30、t Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-k 3 o) o) a, k a U Q) ci (I OI IH O ci C a, u k a, Q 135 120 1 IS 110 100 75 50 .25 O AECMA PREN2624 90 W LOL23

    31、11i 0003730 B ! prEN 2624 Page 7 Percent of Cycle Note : Rated Pressure for High Pressure Components: 100% nominal System Pressure Rated Pressure for Low Pressure Components: 50% nominal System Pressure Figure 1 - Pressure impulse trace Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-


    注意事项

    本文(AECMA PREN 2624-1990 Aerospace Series Pressure Impulse Testing of Hydraulic System Components Issue P 1《航空航天系列飞机液压系统元器件压力脉冲试验》.pdf)为本站会员(inwarn120)主动上传,麦多课文档分享仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开