1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 10094-2:2010Pneumatic fluid power Electro-pneumatic pressurecontrol valvesPart 2: Test methods to determine maincharacteristics to include in the suppliersliteratureBS ISO
2、 10094-2:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 10094-2:2010.The UK participation in its preparation was entrusted to TechnicalCommittee MCE/18/-/5, Control components.A list of organizations represented on this committee can beobtained on request
3、 to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 66276 8ICS 23.100.50Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard
4、 was published under the authority of theStandards Policy and Strategy Committee on 30 November 2010.Amendments issued since publicationDate Text affectedBS ISO 10094-2:2010Reference numberISO 10094-2:2010(E)ISO 2010INTERNATIONAL STANDARD ISO10094-2First edition2010-10-15Pneumatic fluid power Electr
5、o-pneumatic pressure control valves Part 2: Test methods to determine main characteristics to include in the suppliers literature Transmissions pneumatiques Appareils lectropneumatiques de distribution commande continue de pression Partie 2: Mthodes dessai pour dterminer les principales caractristiq
6、ues inclure dans la documentation des fournisseurs BS ISO 10094-2:2010ISO 10094-2:2010(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are li
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11、erland ii ISO 2010 All rights reservedBS ISO 10094-2:2010ISO 10094-2:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .2 4 Symbols and units.2 5 Test conditions 3 5.1 Gas supply .3 5.2 Temperature.3 5.3 Pressure
12、s .3 5.4 Electrical supply 3 6 Test procedures.3 6.1 Test conditions 3 6.2 Inlet pressure .3 6.3 Static tests .4 7 Control signal/pressure static-characteristics test at null forward or relief flow rate .4 7.1 Test installation .4 7.2 Test procedures.5 7.3 Calculation of characteristics 6 8 Flow/pre
13、ssure static characteristics test10 8.1 Test circuit for flow rate measurement .10 8.2 General requirements .11 8.3 Test procedures.11 8.4 Calculation of characteristics 12 9 Pressure regulation characteristics test.14 9.1 Test circuit .14 9.2 Test procedure.14 10 Leakage at null forward flow rate o
14、r relief flow rate characteristic test 15 10.1 Test circuit .15 10.2 Test procedure.15 10.3 Calculation of characteristic 15 11 Dynamic characteristics .16 11.1 Step responses16 11.2 Frequency responses .20 12 Presentation of test results 21 12.1 General .21 12.2 Control signal/pressure static chara
15、cteristics .22 12.3 Flow rate/pressure characteristics 22 12.4 Pressure regulation characteristics 22 12.5 Leakage characteristic22 12.6 Dynamic characteristics .22 Annex A (informative) Calculation procedures of gain and phase lag23 Bibliography27 BS ISO 10094-2:2010ISO 10094-2:2010(E) iv ISO 2010
16、All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a su
17、bject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (
18、IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical commi
19、ttees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not b
20、e held responsible for identifying any or all such patent rights. ISO 10094-2 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 5, Control products and components. ISO 10094 consists of the following parts, under the general title Pneumatic fluid power Electro-pneu
21、matic pressure control valves: Part 1: Main characteristics to include in the suppliers literature Part 2: Test methods to determine main characteristics to include in the suppliers literature BS ISO 10094-2:2010ISO 10094-2:2010(E) ISO 2010 All rights reserved vIntroduction In pneumatic fluid power
22、systems, power is transmitted and controlled through a gas under pressure within a circuit. When pressure tracking or pressure regulation is required, electro-pneumatic continuous pressure control valves can be used to track a variable set point with low tracking error or to maintain the pressure of
23、 the gas at an approximately constant level. These control valves continuously modulate the pneumatic power of a system in response to a continuous electrical input signal and link the electrical input value to a proportional pressure value. It is therefore necessary to know some performance charact
24、eristics of these electro-pneumatic continuous pressure control valves in order to determine their suitability. BS ISO 10094-2:2010BS ISO 10094-2:2010INTERNATIONAL STANDARD ISO 10094-2:2010(E) ISO 2010 All rights reserved 1Pneumatic fluid power Electro-pneumatic pressure control valves Part 2: Test
25、methods to determine main characteristics to include in the suppliers literature 1 Scope This part of ISO 10094 specifies the test procedures and a method of presenting the results concerning the parameters which define the main characteristics to be included in the suppliers literature of the elect
26、ro-pneumatic continuous pressure control valves, conforming to ISO 10094-1. The purpose of this part of ISO 10094 is to facilitate the comparison by standardizing the test methods and the presentation of the test results, and to assist in the proper application of these components in compressed air
27、systems. The specified tests are intended to allow comparison between the different types of continuous pressure control valves; these are not production tests to be carried out on each manufactured product. NOTE 1 The tests related to non-electrically modulated pneumatic continuous pressure control
28、 valves are specified in ISO 6953-2. NOTE 2 The tests related to electro-pneumatic continuous flow control valves are specified in ISO 10041-2. NOTE 3 The tests described in this part of ISO 10094 are realised on components with an exhaust port vented to the atmosphere. 2 Normative references The fo
29、llowing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 5598, Fluid power systems and components Vocabulary
30、 ISO 6358-11), Pneumatic fluid power Determination of flow-rate characteristics of components Part 1: General rules and test methods for steady-state flow ISO 6953-1, Pneumatic fluid power Compressed air pressure regulators and filter-regulators Part 1: Main characteristics to be included in literat
31、ure from suppliers and product-marking requirements ISO 10094-1:2010, Pneumatic fluid power Electro-pneumatic pressure control valves Part 1: Main characteristics to include in the suppliers literature 1) To be published. BS ISO 10094-2:2010ISO 10094-2:2010(E) 2 ISO 2010 All rights reserved3 Terms a
32、nd definitions For the purposes of this document, the terms and definitions given in ISO 5598, ISO 6953-1 and ISO 10094-1 apply. 4 Symbols and units For the purposes of this document, the symbols and units listed in Table 1 apply. Table 1 Symbols and units Description Symbol SI unit Maximum sonic co
33、nductance at the inlet Cf,maxm3/(sPa) (ANR)bSonic conductance at the exhaust Crm3/(sPa) (ANR)bAtmospheric pressure patmPa Reference pressurebp0Pa Total relative pressure at the inlet portap1Pa Total relative pressure at the outlet portap2Pa Total relative pressure at the exhaust portap3Pa Pressure d
34、ifference p Pa Hysteresis H % Maximal difference of hysteresis p2,h,maxPa Linearity L % Maximal difference of the linearity p2,l,maxPa Volume flow rate at standard reference atmosphere qVm3/s (ANR)bMaximum volume flow rate at the inlet qV,f,maxm3/s (ANR)bVolume flow rate at the outlet qV,rm3/s (ANR)
35、bRepeatability r Reference temperature T0K Temperature at the inlet portaT1K Temperature at the outlet portaT2K Electrical control signal for which the regulated pressure increases again wstartV, mA or numerical signal Electrical control signal for which the regulated pressure no longer evolves wsto
36、pV, mA or numerical signal Resolution S % a In accordance with ISO 11727. b The reference atmosphere is defined in lSO 8778, i.e.: T0= 293,15 K, p0= 100 kPa (1 bar) and a relative humidity of 65 %. BS ISO 10094-2:2010ISO 10094-2:2010(E) ISO 2010 All rights reserved 35 Test conditions 5.1 Gas supply
37、Unless otherwise specified, testing shall be conducted with compressed air. If another gas is used, it shall be noted in the test report. 5.2 Temperature The ambient, fluid and the component-under-test temperatures shall be maintained at 23 C 10 C during all the tests. 5.3 Pressures 5.3.1 General Th
38、e specified pressures shall be maintained within 2 %. 5.3.2 Inlet pressure The inlet pressure used for testing shall be the lower of the following pressures: the maximum regulated pressure, p2,max, plus 200 kPa (2 bar); and the specified maximum inlet pressure, p1,max. 5.3.3 Test pressures The prefe
39、rential test pressures are chosen as approximately equal to 20 %, 40 %, 60 %, 80 % and 100 % of the maximum of the setting pressure scale. 5.3.4 Checking It shall be periodically verified that no pressure bleed of measuring instruments is obstructed by solid or liquid particles. 5.4 Electrical suppl
40、y The tests shall be carried out under electrical nominal conditions. 6 Test procedures 6.1 Test conditions The component under test shall be used according to the manufacturers application instructions. 6.2 Inlet pressure During every measurement concerning the static or dynamic tests described in
41、Clauses 7 to 11, the inlet pressure, p1, shall be maintained constant. In the case of the dynamic tests as described in Clause 11, a tank buffer shall be used in order to reduce the inlet pressure, p1, fluctuations, as indicated in Figures 9 and 10. BS ISO 10094-2:2010ISO 10094-2:2010(E) 4 ISO 2010
42、All rights reserved6.3 Static tests During every measurement series concerning static tests described in Clauses 7, 8, 9 and 10, as soon as the steady conditions are reached, every series of results obtained with related specified test conditions shall be recorded. When these measurements are perfor
43、med step by step, slowly modify the conditions to prevent instability. NOTE 1 Figures 1, 6, 8, 9 and 10 represent typical circuits that do not show the electrical supply circuit necessary to operate electrically modulated pneumatic valves and that do not contain all the necessary safety devices for
44、protection against hazards that may be caused by the failure of a component or piping. It is important that those responsible for conducting the tests take into account the necessity to protect personnel and property. NOTE 2 The graphic symbols used in Figures 1, 6, 8, 9 and 10 are in accordance wit
45、h ISO 1219-1. 7 Control signal/pressure static-characteristics test at null forward or relief flow rate 7.1 Test installation 7.1.1 Test circuit Figure 1 represents a typical test circuit for the control signal/pressure characterization at null forward or relief flow rate. For all tests described in
46、 7.2, apply the inlet pressure chosen according to 5.3.2. Key 1 supply pressure regulator 7 component under test 2 shut-off valve 8 connector with pressure-measuring tap 3 pressure-measuring tube 9 plug 4 inlet temperature T1measuring-element 10 regulated pressure p2gauge or transducer 5 inlet press
47、ure p1gauge or transducer 11 signal generator 6 upstream transition connector 12 X-Y recorder Figure 1 Typical test circuit for control signal/pressure characterization BS ISO 10094-2:2010ISO 10094-2:2010(E) ISO 2010 All rights reserved 57.1.2 Pressure measurement The inlet pressure sensor is instal
48、led on a pressure-measuring tube in accordance with ISO 6358-1. The regulated pressure sensor is an external measurement sensor, even if the component under test has an internal pressure sensor. The connector 8 which measures the regulated pressure in Figure 1, is plugged to guarantee a null operati
49、ng flow rate. The length (volume) of this connector shall be as short (small) as possible. 7.2 Test procedures 7.2.1 Control signal/pressure static characteristics test Using a signal generator to create a triangular signal to explore the control signal full-scale (0 % to 100 %), record the electrical control signal, w, in the X-axis and the regulated pressure, p2, in the Y-axis of a recorder so as to obtain a hysteresis curve. The triangular electrical control signal shall
