1、BS ISO10770-1:2009ICS 23.100.50NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDHydraulic fluidpower Electricallymodulated hydrauliccontrol valvesPart 1: Test methods for four-portdirectional flow-control valvesThis British Standard was published under the author
2、ity of the Standards Policy and Strategy Committee on 30 November 2009 BSI 2009ISBN 978 0 580 60277 1Amendments/corrigenda issued since publicationDate CommentsBS ISO 10770-1:2009National forewordThis British Standard is the UK implementation of ISO 10770-1:2009. Itsupersedes BS ISO 10770-1:1998 whi
3、ch is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee MCE/18/-/8, Product testing.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contr
4、act. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunityfrom legal obligations.BS ISO 10770-1:2009Reference numberISO 10770-1:2009(E)ISO 2009INTERNATIONAL STANDARD ISO10770-1Second edition2009-10-01Hydraulic fluid power Electrically modulated
5、hydraulic control valves Part 1: Test methods for four-port directional flow-control valves Transmissions hydrauliques Distributeurs hydrauliques modulation lectrique Partie 1: Mthodes dessai pour distributeurs de commande de dbit quatre voies BS ISO 10770-1:2009ISO 10770-1:2009(E) PDF disclaimer Th
6、is 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 licensed to and installed on the computer performing the editing. In downloading this file, parties accept th
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9、UMENT ISO 2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member bod
10、y in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedBS ISO 10770-1:2009ISO 10770-1:2009(E) ISO 2009 All rights reserved i
11、iiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms, definitions, symbols and units2 3.1 Terms and definitions .2 3.2 Symbols and units.2 4 Standard test conditions 3 5 Test installation .3 6 Accuracy.5 6.1 Instrument accuracy .5 6.2 Dynamic range.5 7 Electrical tests
12、 for valves without integrated electronics.5 7.1 General .5 7.2 Coil resistance .5 7.3 Coil inductance Optional test 5 7.4 Insulation resistance.7 8 Performance tests .7 8.1 Steady state tests 7 8.2 Dynamic tests 24 9 Pressure impulse test .29 10 Presentation of results30 10.1 General .30 10.2 Test
13、reports30 11 Identification statement (Reference to this part of ISO 10770)31 Annex A (informative) Testing guidance 32 BS ISO 10770-1:2009ISO 10770-1:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standa
14、rds bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organ
15、izations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given i
16、n the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 %
17、 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 be held responsible for identifying any or all such patent rights. ISO 10770-1 was prepared by Technical Committee ISO/TC 131, Flu
18、id power systems, Subcommittee SC 8, Product testing. This second edition cancels and replaces the first edition (ISO 10770-1:1998), which has been technically revised. ISO 10770 consists of the following parts, under the general title Hydraulic fluid power Electrically modulated hydraulic control v
19、alves: Part 1: Test methods for four-port directional flow-control valves Part 2: Test methods for three-way directional flow control valves Part 3: Test methods for pressure control valves BS ISO 10770-1:2009ISO 10770-1:2009(E) ISO 2009 All rights reserved vIntroduction This part of ISO 10770 has b
20、een prepared with the intention of improving the uniformity of valve testing and hence the consistency of recorded valve performance data so that these data can be used for system design, regardless of the data source. BS ISO 10770-1:2009BS ISO 10770-1:2009INTERNATIONAL STANDARD ISO 10770-1:2009(E)
21、ISO 2009 All rights reserved 1Hydraulic fluid power Electrically modulated hydraulic control valves Part 1: Test methods for four-port directional flow-control valves 1 Scope This part of ISO 10770 describes methods for determining the performance characteristics of electrically modulated, hydraulic
22、, four-port directional flow-control valves. This type of electrohydraulic valve controls the direction and flow in a hydraulic system. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited appli
23、es. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1219-1, Fluid power systems and components Graphic symbols and circuit diagrams Part 1: Graphic symbols for conventional use and data-processing applications ISO 3448, Industrial liquid
24、lubricants ISO viscosity classification ISO 4406, Hydraulic fluid power Fluids Method for coding the level of contamination by solid particles ISO 5598, Fluid power systems and components Vocabulary ISO 6743-4, Lubricants, industrial oils and related products (class L) Classification Part 4: Family
25、H (Hydraulic systems) ISO 9110-1, Hydraulic fluid power Measurement techniques Part 1: General measurement principles ISO 10771-1, Hydraulic fluid power Fatigue pressure testing of metal pressure-containing envelopes Part 1: Test methods IEC 60617-DB-12M, Graphical symbols and diagrams BS ISO 10770-
26、1:2009ISO 10770-1:2009(E) 2 ISO 2009 All rights reserved3 Terms, definitions, symbols and units 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5598, together with the following, apply. 3.1.1 electrically modulated, hydraulic directional flow-contr
27、ol valve valve that provides a degree of proportional flow control in response to a continuously variable electrical input signal NOTE The flow direction can be changed by the input signal. 3.1.2 input signal deadband portion of input signal that does not produce a controlled flow 3.1.3 threshold ch
28、ange of input signal required to produce a reversal in continuous control valve output NOTE The threshold is expressed as a percentage of rated signal. 3.1.4 rated input signal that signal defined by the manufacturer to achieve rated output 3.2 Symbols and units For the purposes of this document, th
29、e symbols given in Table 1 apply. NOTE The graphic symbols in this part of ISO 10770 conform to ISO 1219-1 and IEC 60617-DB-12M. Table 1 Symbols and units Parameter Symbol Unit Inductance LcH Insulation resistance Ri Insulation test current IiA Insulation test voltage UiV Resistance Rc Dither amplit
30、ude % (of max. input signal) Dither frequency Hz Input signal I, or U A, or V Rated input signal In, or UnA, or V Output flow q l/min Rated flow qnl/min Flow gain Kv= (q/I), or Kv= (q/U) l/min/A, or l/min/V Hysteresis % (of max. output signal) Internal leakage qll/min Supply pressure pPMPa (bar) Ret
31、urn pressure pTMPa (bar) BS ISO 10770-1:2009ISO 10770-1:2009(E) ISO 2009 All rights reserved 3Table 1 (continued) Parameter Symbol Unit Load pressure pAor pBMPa (bar) Load pressure difference pL= pA pB, or pL= pB pAMPa (bar) Valve pressure drop pV= pP pT pLMPa (bar) Rated valve pressure drop pnMPa (
32、bar) Pressure gain Kp= (pL/I), or Kp= (pL/U) MPa (bar)/A MPa (bar)/V Threshold % (of max. input signal) Amplitude (ratio) dB Phase lag Temperature C Frequency f Hz Time t s Time constant tcs Linearity error qerrl/min 4 Standard test conditions Unless otherwise specified, tests shall be carried out u
33、sing the standard test conditions given in Table 2. Table 2 Standard test conditions Parameter Condition Ambient temperature 20 C 5 C Fluid cleanliness Solid contaminant code number shall be stated in accordance with ISO 4406. Fluid type Commercially available mineral-based hydraulic fluid (i.e. L -
34、 HL in accordance with ISO 6743-4 or other fluid with which the valve is able to operate) Fluid viscosity 32 cSt 8 cSt at valve inlet Viscosity grade Grade VG32 or VG46 in accordance with ISO 3448 Pressure drop Test requirement 2,0 % Return pressure Shall conform to the manufacturers recommendations
35、 5 Test installation A test installation conforming to the requirements of Figure 1 shall be used for testing all valves. SAFETY PRECAUTIONS It is essential that consideration be given to the safety of personnel and equipment during the tests. Figure 1 shows the minimum items required to carry out t
36、he tests without any safety devices to protect against damage in the event of component failure. For tests using the test circuit shown in Figure 1, the following apply. a) Guidance on carrying out the tests is given in Annex A. b) A separate circuit may be constructed for each type of test. This ca
37、n improve the accuracy of test results as it eliminates the possibility of leakage through the shut-off valves. c) Hydraulic performance tests are carried out on a combination of valve and amplifier. Input signals are applied to the amplifier and not directly to the valve. For electrical tests, the
38、signals are applied directly to the valve. BS ISO 10770-1:2009ISO 10770-1:2009(E) 4 ISO 2009 All rights reservedd) If possible, hydraulic tests should be conducted using an amplifier recommended by the valve manufacturer. If not, the type of amplifier used should be recorded, with the operating deta
39、ils (i.e. pulse-width modulation frequency, dither frequency and amplitude). e) The amplifier supply voltage and magnitude and sign of the voltage applied to the valve during the on and off periods of the pulse-width modulation should be recorded. f) Electronic test equipment and transducers should
40、have a bandwidth or natural frequency at least ten times greater than the maximum test frequency. Key 1 main flow source 10, 11 flow transducer S1 to S9 shut-off valves 2 main relief valve 12 signal generator A, B control ports 3 external pilot flow source 13 temperature indicator P supply port 4 ex
41、ternal pilot relief valve 14 pressure gauge T return port 5 unit under test 15 signal conditioner X pilot supply port 6 to 9 pressure transducers 16 data acquisition Y pilot drain port Figure 1 Test circuit BS ISO 10770-1:2009ISO 10770-1:2009(E) ISO 2009 All rights reserved 56 Accuracy 6.1 Instrumen
42、t accuracy Instrumentation shall be accurate to within the limits shown in Class B of ISO 9110-1: a) electrical resistance: 2 % of the actual measurement; b) pressure: 1 % of the valves rated pressure drop to achieve rated flow; c) temperature: 2 % of the ambient temperature; d) flow: 2,5 % of the v
43、alves rated flow; e) input signal: 1,5 % of the electrical input signal required to achieve the rated flow. 6.2 Dynamic range For the dynamic tests, ensure that the measuring equipment, amplifiers and recording devices do not generate any damping, attenuation or phase shift of the output signal bein
44、g recorded that can affect the measured value by more than 1 % of the measured value. 7 Electrical tests for valves without integrated electronics 7.1 General As appropriate, perform the tests described in 7.2 to 7.4 on all valves without integrated electronics before proceeding to subsequent tests.
45、 NOTE Tests 7.2 to 7.4 apply only to current-driven valves. 7.2 Coil resistance 7.2.1 Coil resistance Cold Carry out the test as follows. a) Soak the complete, un-energized valve at the specified ambient temperature for at least 2 h. b) Measure and record the electrical resistance between the two le
46、ads or terminals of each coil in the valve. 7.2.2 Coil resistance Hot Carry out the test as follows. a) Soak the complete, energized valve, mounted on a subplate recommended by the manufacturer, at its maximum rated temperature and operate the complete valve, fully energized and without flow, until
47、the coil temperature stabilizes. b) Measure and record the electrical resistance between the two leads or terminals of each coil in the valve. The resistance value shall be measured within 1 s of removing the supply voltage. 7.3 Coil inductance Optional test This test method shall not be construed t
48、o determine a definitive value of inductance. The value obtained shall be used for comparison purposes only. BS ISO 10770-1:2009ISO 10770-1:2009(E) 6 ISO 2009 All rights reservedCarry out the test as follows. a) Connect the coil to a constant voltage supply capable of delivering at least the rated c
49、urrent of the coil. b) The armature shall be held stationary at 50 % of its working stroke during the test. c) Monitor the coil current on an oscilloscope or similar equipment. d) Adjust the voltage so that the steady-state current equals the rated current of the coil. e) Switch the voltage off then on and record the current transient behaviour. f) Determine the time constant, tc, of the coil (see Figure 2) and calculate the
