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GB/T 15623.1-2018 English PDF

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GB/T 15623.1-2018: Hydraulic fluid power -- Electrically modulated hydraulic control valves -- Part 1: Test methods for four-port directional flow-control valves
Status: Valid

GB/T 15623.1: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 15623.1-2018679 Add to Cart 6 days Hydraulic fluid power -- Electrically modulated hydraulic control valves -- Part 1: Test methods for four-port directional flow-control valves Valid
GB/T 15623.1-2003RFQ ASK 5 days Hydraulic fluid power -- Electrically modulated hydraulic control valves -- Part 1: Test methods for four-way directional flow control valves Obsolete
GB/T 15623-1995999 Add to Cart 6 days Hydraulic fluid power--Servovales--Test methods Obsolete

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Basic data

Standard ID: GB/T 15623.1-2018 (GB/T15623.1-2018)
Description (Translated English): Hydraulic fluid power -- Electrically modulated hydraulic control valves -- Part 1: Test methods for four-port directional flow-control valves
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J20
Classification of International Standard: 23.100.50
Word Count Estimation: 34,350
Date of Issue: 2018-02-06
Date of Implementation: 2018-09-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 15623.1-2018: Hydraulic fluid power -- Electrically modulated hydraulic control valves -- Part 1: Test methods for four-port directional flow-control valves


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Hydraulic fluid power-Electrically modulated hydraulic control valves-Part 1. Test methods for four-port directional flow-control valves ICS 23.100.50 J20 National Standards of People's Republic of China Replace GB/T 15623.1-2003 Hydraulic transmission electric modulation hydraulic control valve Part 1. Test method for flow control valves in four-way direction Part 1. Testmethodsforfour-portdirectionalflow-controlvalves (ISO 10770-1.2009, MOD) Published on.2018-02-06 2018-09-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration issued

Content

Foreword I Introduction III 1 Scope 1 2 Normative references 1 3 Terms and definitions, symbols and units 1 4 Test conditions 3 5 test device 3 6 accuracy 4 7 Electrical characteristics test of valves without integrated amplifiers 5 8 performance test 6 9 Pressure pulse test 26 10 results expression 26 11 Labeling instructions 27 Appendix A (Informative Appendix) Test Implementation Guide 28

Foreword

GB/T 15623 "Hydraulic transmission electric modulation hydraulic control valve" is divided into the following three parts. --- Part 1. Test method for flow control valve in four-way direction; ---Part 2. Test method for flow control valve in three-way direction; --- Part 3. Test method for pressure control valves. This part is the first part of GB/T 15623. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 15623.1-2003 "Hydraulic drive electric modulation hydraulic control valve - Part 1. Flow control in four-way direction Valve test method, compared with GB/T 15623.1-2003, the main technical changes are as follows. --- Added reference standard GB/T 19934.1, JB/T 7033-2007 (see Chapter 2); --- Removed the term "electrically modulated hydraulic flow control valve" (2003 version 3.1), adding the term "electrically modulated hydraulic four-way directional flow Volume control valve" "input signal dead zone" "threshold" and "rated input signal" (see 3.1); ---Modified the contents of "symbols and units" (see Table 1, Table 1 of the.2003 edition); ---In the test conditions, the "hydraulic fluid temperature" and "supply pressure" (Table 2 of the.2003 edition) were deleted, and the "fluid viscosity grade" was added. And "pressure drop" (see Table 2); --- Modified the test circuit (see Figures 1 and 5, Figure 1 and Figure 2 of the.2003 version); --- Increased the "resistance" and "dynamic range" requirements for meter accuracy (see 6.1 and 6.2); --- Added cold and hot test of "coil resistance" (see 7.1 and 7.2); --- Removed "throttle adjustment characteristic test" "output flow - load differential pressure characteristic test" and "pressure difference - oil temperature characteristic test" (2003) Versions 8.1.6, 8.1.7 and 8.1.11); --- Removed the "durability test" and "environmental test" (Chapters 9 and 11 of the.2003 edition); This part adopts the redrafting method to modify the ISO 10770-1.2009 "hydraulic drive electric modulation hydraulic control valve Part 1. Four Test method for flow control valve in the direction. The structural adjustments in this section compared to ISO 10770-1.2009 are as follows. --- Add "8.1 Overview" in the original "Chapter 8 Performance Test", including the suspension segment, and the following article number is postponed. The technical differences between this part and ISO 10770-1.2009 and their reasons are as follows. ---About the normative reference documents, this part has made technical adjustments to adapt to China's technical conditions, adjustments The situation is reflected in Chapter 2, “Regulatory References”, and the specific adjustments are as follows. ● Replace ISO 1219-1 with GB/T 786.1 equivalent to the international standard; ● Replace ISO 3448 with GB/T 3141-1994 equivalent to international standards; ● Replace IEC 60617 with GB/T 4728.1 equivalent to the international standard; ● Replace ISO 6743-4 with GB/T 7631.2 equivalent to the international standard; ● Replace ISO 4406 with GB/T 14039 modified to adopt international standards; ● Replace ISO 5598 with GB/T 17446 equivalent to the international standard; ● Replace ISO 10771-1 with GB/T 19934.1 equivalent to the international standard; ● Replace ISO 9110-1 with JB/T 7033-2007 modified to international standards. --- Removed the term "electrically modulated hydraulic direction flow control valve" (see ISO 10770-1.2009 3.1.1) with the addition of the term "electrical adjustment" Hydraulic four-way direction flow control valve" (see 3.1.1); --- specifies that the mineral hydraulic oil should meet the L-HL of GB/T 7631.2 (see Table 2); --- For the accuracy of Chapter 6, the instrument temperature allows the system error to be "c) temperature. ±2% of ambient temperature", modified to "c) temperature Degree. ±2% of the measured temperature value, because the test temperature is more reasonable. This section also made the following editorial changes. --- In Chapter 8, Figure 14, add the Y1 symbol to the curve to indicate the "amplitude ratio curve"; add the Y2 symbol to indicate "Phase lag curve". --- Removed the unit of pressure "bar". This part was proposed by the China Machinery Industry Federation. This part is under the jurisdiction of the National Hydraulic and Pneumatic Standardization Technical Committee (SAC/TC3). This section drafted by. Haimen Vitos Hydraulic Valve Co., Ltd., Beijing Precision Electromechanical Control Equipment Research Institute, AVIC Aviation Industry Jincheng Nanjing Electromechanical Hydraulic Engineering Research Center, Shanghai Hengtuo Hydraulic Control Technology Co., Ltd., Nanjing Chenguang Group Co., Ltd. Division, Zhejiang University, Haimen Oilpower Hydraulic Industry Co., Ltd., Beijing Huade Hydraulic Industry Group Co., Ltd., Shanghai Boschli Shile Hydraulic & Automation Co., Ltd., Sikesi Hydraulic Technology Co., Ltd. The main drafters of this section. Lin Guang, Chen Dongsheng, He Youwen, Xiao Lin, Gong Daping, Zou Xiaozhou, Fang Qun, Jin Yaolan, Yuan Yong, Zhang Xiaojie, Xu Bing, But Xinqiang, Zhou Liqin, Zhu Hongyan, Hu Qihui, Shen Guorong, Liang Yong, Gao Weilei. The previous versions of the standards replaced by this section are. ---GB/T 15623-1995, GB/T 15623.1-2003.

Introduction

The purpose of the GB/T 15623.1 is to improve the standardization of the valve test, and thus improve the consistency of the recorded valve performance data, so that this These data are used for system design without having to consider the source of the data. Hydraulic transmission electric modulation hydraulic control valve Part 1. Test method for flow control valves in four-way direction

1 Scope

This part of GB/T 15623 specifies the test method for the performance characteristics of the electric modulation hydraulic four-way flow control valve. This section applies to the electric modulation hydraulic four-way direction flow control valve. Note. In the hydraulic system, the electric modulation hydraulic four-way flow control valve generally includes different types of products such as servo valves and proportional valves, which can be continuously transmitted through electrical signals. Control flow and direction changes. Unless otherwise specified, "valve" means an electrically modulated hydraulic four-way flow control valve.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 786.1 Fluid transmission systems and components - Graphical symbols and diagrams - Part 1 . diagrams for general purpose and data processing Shape symbol (GB/T 786.1-2009, ISO 1219-1.2006, IDT) GB/T 3141-1994 Industrial liquid lubricants ISO viscosity classification (eqvISO 3448.1992) GB/T 4728.1 Graphical symbols for electrical diagrams - Part 1. General requirements (GB/T 4728.1-2005, IEC 60617 Base, IDT) GB/T 7631.2 Classification of lubricants, industrial oils and related products (Class L) Part 2. Group H (hydraulic systems) (GB/T 7631.2- 2003, ISO 6743-4..1999, IDT) GB/T 14039 hydraulic transmission oil solid particle pollution level code (GB/T 14039-2002, ISO 4406.1999, MOD) GB/T 17446 fluid drive system and component vocabulary (GB/T 17446-2012, ISO 5598.2008, IDT) GB/T 19934.1 Hydraulic fluid power - Pressure-bearing shells - Part 1 . Test methods (GB/T 19934.1-2005, ISO 10771-1.2002, IDT) JB/T 7033-2007 General rules for hydraulic transmission measurement technology (ISO 9110-1..1990, MOD) 3 Terms and definitions, symbols and units 3.1 Terms and definitions The following terms and definitions as defined in GB/T 17446 apply to this document. 3.1.1 Electric modulation hydraulic four-way direction flow control valve electricalymodulatedhydraulicfour-portdirectionalflow-controlvalve A four-way valve that responds to continuously changing electrical input signals to control output flow and direction. 3.1.2 Input signal dead zone inputsignaldeadband It is not possible to generate an input signal range that controls the change in flow. 3.1.3 Threshold threshold The continuous control valve produces the amount of change in the input signal required for the reverse output. Note. The threshold is expressed as a percentage of the nominal signal. 3.1.4 Rated input signal ratedinputsignal The input signal given by the manufacturer to the rated output. 3.2 Symbols and units The symbols used in this section are shown in Table 1. All graphic symbols shall comply with the provisions of GB/T 786.1 and GB/T 4728.1. Table 1 Symbols and units Parametric symbol unit Inductance LC H Insulation resistance Ri Ω Insulation test current Ii A Insulation test voltage Ui V Resistance RC Ω Shake amplitude value - % (% of maximum input signal) Flutter frequency - Hz Input signal I or UA or V Rated input signal In or Un A or V Output flow q L/min Rated flow rate qn L/min Flow gain KV=(Δq/ΔI) or KV=(Δq/ΔU) (L/min)/A or (L/min)/V Hysteresis - % (% of maximum output signal) Internal leakage qI L/min Oil supply pressure pP MPa Return pressure pT MPa Load pressure pA or pB MPa Load differential pressure pL=pA-pB or pL=pB-pA MPa Valve pressure drop pV=pP-pT-pL MPa Rated valve pressure drop pn MPa Pressure gain KP=(ΔpL/ΔI) or KP=(ΔpL/ΔU) MPa/A or MPa/V Threshold - % (% of maximum output signal) Amplitude ratio (ratio) - dB Phase shift - (°) Table 1 (continued) Parametric symbol unit Temperature - °C Frequency f Hz Time ts Time constant tC s Linearity error qerr L/min

4 test conditions

Unless otherwise specified, the valve shall be tested in accordance with the test conditions given in Table 2. Table 2 Test conditions Parameter condition Ambient temperature 20 °C ± 5 ° C Oil pollution degree solid particle pollution should be expressed in accordance with the code specified in GB/T 14039 Fluid type mineral hydraulic oil (in accordance with GB/T 7631.2 L-HL) The inlet of the fluid viscosity valve is 32mm2/s±8mm2/s The viscosity of the fluid meets the VG32 or VG46 specified in GB/T 3141-1994. ±2.0% of the required pressure drop test Return pressure meets manufacturer's recommendations

5 test device

For test equipment of all types of valves, test circuits complying with the requirements of Figure 1 shall be used. Safety Tip. The test process should take into account the safety of personnel and equipment. The test circuit shown in Figure 1 is the most basic requirement required to complete the test and does not include a safety device. Use the loop test shown in Figure 1. When using the following steps. a) See Appendix A for the test implementation guidelines. b) A separate test circuit can be established for each test to eliminate the possibility of leakage caused by the shut-off valve and improve the test results. Authenticity. c) The hydraulic performance test is carried out in a combination of valves and amplifiers. The input signal acts on the amplifier instead of acting directly on the valve. For electrical testing, the input signal acts directly on the valve. d) Whenever possible, use the amplifier recommended by the manufacturer for hydraulic testing, otherwise the type and operation details of the amplifier should be recorded (eg pulse Wide modulation frequency, dither frequency and amplitude, etc.). e) recording the supply voltage, amplitude and voltage signal acting on the valve under test during the opening and closing of the pulse width modulation frequency Size and waveform. f) The bandwidth or natural frequency of the electrical test equipment and sensors is at least 10 times greater than the maximum test frequency. Description. 1 --- main oil source; 10, 11---flow sensor; S1~S9---stop valve; 2 --- main relief valve; 12 --- signal generator; A, B --- control port; 3 --- external pilot oil source; 13 --- temperature indicator; P --- inlet port; 4 --- external pilot oil source relief valve; 14 --- pressure gauge; T --- return port; 5 ---test valve; 15 --- signal conditioner; X --- pilot inlet port; 6~9---pressure sensor; 16 --- data acquisition; Y --- pilot drain port. Figure 1 Test circuit

6 Accuracy

6.1 Instrument accuracy The accuracy of the meter shall be Class B as specified in JB/T 7033-2007, allowing the systematic error to be. a) Resistance. ±2% of the actual measured value; b) Pressure. ±1% of the rated pressure drop of the valve at rated flow; c) temperature. ±2% of the measured temperature value; d) flow rate. ±2.5% of the rated flow of the valve; e) Input signal. ±1.5% of the input electrical signal at rated flow. 6.2 Dynamic range Perform dynamic tests to ensure that any damping, attenuation, and phase shifts produced by the measuring equipment, amplifier, or recording device are recorded The effect of the outgoing signal does not exceed 1% of its measured value.

7 Electrical characteristics test of valves without integrated amplifier

7.1 Overview The tests described in 7.2 to 7.4 shall be performed only for valves without integrated amplifiers, as needed, prior to subsequent testing. Note. The test of 7.2~7.4 is only applicable to valves that are driven directly by current. 7.2 Coil resistance 7.2.1 Coil resistance (cold state) Test as follows. a) placing the unpowered valve at the specified ambient temperature for at least 2 h; b) Measure and record the resistance across each coil on the valve. 7.2.2 Coil resistance (hot state) Test as follows. a) Install the valve on the manufacturer's recommended base plate, internally immersed in oil, fully energized, and when the maximum rated temperature is reached, the valve starts to work. Maintain sufficient excitation and no oil flow until the coil temperature is stable; b) The resistance value at each end of each coil shall be measured and recorded within 1 s after the valve is de-energized. 7.3 Coil inductance (optional) The inductance value measured by this method does not represent the inductance of the coil itself, and is only used as a reference when comparing. Experiment with the following steps. a) connect the coil to a regulated power supply that provides and guarantees the rated current of the coil; b) During the test, the armature should be kept at 50% of the working stroke; c) monitor the coil current with an oscilloscope or similar device; d) adjust the voltage so that the steady state current is equal to the rated current of the coil; e) turn off the power and turn it on again to record the transient characteristics of the current; f) Determine the time constant tC of the coil (see Figure 2) and calculate the inductance value LC using equation (1). LC=RCtC (1) Description. X---time; Y---current; 1---DC current curve; 2---time constant, tC. a starting point. Figure 2 coil inductance measurement curve 7.4 Insulation resistance Determine the insulation resistance of the coil as follows. a) If the internal electrical components are exposed to oil (such as wet coils), hydraulic fluid should be injected into the valve before performing this test; b) connect the two ends of the coil and apply a DC voltage between the connection point and the valve body, Ui=500V for 15s; c) using a suitable insulation resistance tester to measure, record the insulation resistance Ri; d) If the insulation test current Ii is measured using a tester with current reading, the insulation resistance can be calculated using equation (2). Ri= Ui (2)

8 performance test

8.1 Overview All performance tests should be directed to the combination of valve and amplifier, as the input signal acts only on the amplifier, not directly on the valve. Where possible, for multi-stage valves, the valve configuration mode should be the pilot external supply and external drain. Conventional mechanical/electrical adjustments such as zero position, input signal deadband and gain adjustment should be performed prior to starting any test. 8.2 steady state test 8.2.1 Overview When performing a steady-state performance test, care should be taken to eliminate factors that affect its dynamic characteristics. Steady-state tests should be performed in the following order. a) Withstand voltage test (optional) (see 8.2.2). b) Internal leakage test (see 8.2.3). c) Test the output flow-input signal characteristics of the valve at a constant pressure drop (see 8.2.4 and 8.2.5) to determine. 1) rated flow; 2) flow gain; 3) Flow linearity; 4) Flow hysteresis; 5) Flow symmetry; 6) Flow polarity; 7) the spool cover state; 8) Threshold. d) Output flow - valve pressure drop characteristics test (see 8.2.6); e) limit output flow - valve pressure drop characteristics test (see 8.2.7); f) output flow - oil temperature characteristics test (see 8.2.8); g) Pressure gain - input signal characteristic test (see 8.2.9); h) Pressure zero drift test (see 8.2.10); i) Failure protection function test (see 8.1.21). 8.2.2 Withstand voltage test (optional) 8.2.2.1 Overview The pressure test of the tested valve can be carried out before the test of other items to verify the integrity of the valve. 8.2.2.2 P, A, B and X port test procedures When performing the withstand voltage test, the oil return port is opened, and the pressure is applied to the oil inlet P of the valve, the control ports A, B, and the external pilot port X. press The following steps are tested. a) The pressure applied by P, A, B and pilot port X of the valve is 1.3 times its rated pressure for at least 30 s; during the first half of the cycle, Enter the maximum input signal; in the second half of the cycle, enter the minimum input signal. b) Check the valve for external leaks during the test. c) After the test, check the valve for permanent deformation. d) Record the withstand voltage test. 8.2.2.3 T port test procedure Experiment with the following steps. a) The pressure applied by the valve T port is 1.3 times its rated pressure, at least 30s; b) check the valve for external leakage during the test; c) After the test, check the valve for permanent deformation; d) Record the withstand voltage test. 8.2.2.4 Pilot drain Y port Any external pilot......
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