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GB/T 21486-2019 English PDF

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GB/T 21486-2019: Hydraulic fluid power - Filter elements - Sequence of tests for verifying performance characteristics
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GB/T 21486: Evolution and historical versions

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GB/T 21486-2019English199 Add to Cart 3 days [Need to translate] Hydraulic fluid power - Filter elements - Sequence of tests for verifying performance characteristics Valid GB/T 21486-2019
GB/T 21486-2008English319 Add to Cart 3 days [Need to translate] Hydraulic fluid power -- Filter elements -- Sequence of tests for verifying performance characteristics Obsolete GB/T 21486-2008

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Basic data

Standard ID GB/T 21486-2019 (GB/T21486-2019)
Description (Translated English) Hydraulic fluid power - Filter elements - Sequence of tests for verifying performance characteristics
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J20
Classification of International Standard 23.100.60
Word Count Estimation 10,181
Date of Issue 2019-10-18
Date of Implementation 2020-05-01
Older Standard (superseded by this standard) GB/T 21486-2008
Quoted Standard ISO 2941; ISO 2942; ISO 2943; ISO 3723; ISO 3724; ISO 3968; ISO 4406; ISO 5598; ISO 16889; ISO 23181
Adopted Standard ISO 11170-2013, IDT
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration
Summary This standard specifies test procedures for checking the performance characteristics of filter elements for the hydraulic, mechanical and filtration characteristics of filter elements. This standard does not apply to the qualification verification of filter elements with special requirements or specific working conditions. If these verifications are to be carried out, dedicated test procedures should be developed, including actual use conditions (eg working fluids). The test procedures specified in this standard are applicable to the filter element with hydraulic oil or liquid with similar chemical properties as the working medium.

GB/T 21486-2019: Hydraulic fluid power - Filter elements - Sequence of tests for verifying performance characteristics


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Hydraulic fluid power--Filter elements--Sequence of tests for verifying performance characteristics ICS 23.100.60 J20 National Standards of People's Republic of China Replaces GB/T 21486-2008 Inspection performance characteristics of hydraulic transmission filter Test procedure (ISO 11170..2013, Hydraulicfluidpower-Sequenceoftestsfor verifyingperformancecharacteristicsoffilterelements, IDT) Published on October 18,.2019 2020-05-01 implementation State Administration of Market Supervision Published by China National Standardization Administration

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 21486-2008 "Test procedures for inspecting performance characteristics of hydraulic filter elements" and is in line with GB/T 21486-2008 The main technical changes are as follows. --- Added test procedure for measuring flow fatigue tolerance using high viscosity oil [see 5.1.1g) and Figure 1]; --- Added "If it can be proved that this test has nothing to do with the design of the test filter element, the No. 2 filter element (see 5.2.4 for the numbering method of the filter element) can be To omit the description of the test "[see 5.1.1h)]; --- Amended some terms in Table 1, the changes are as follows. ● The "contamination capacity" in the test project was modified to "scale capacity", "rupture resistance" was modified to "crushed (rupture) rated pressure" "Flow fatigue characteristics" was modified to "Flow fatigue tolerance" (see Table 1, Table 1 of the.2008 edition); ● The test procedure for which the test item is “filter ratio” has been added without first structural integrity verification (see Table 1); ● The test procedure for which the test item is "Rated Axial Load" has added no compatibility test of materials and liquids (see Table 1); ● The test items are deleted from the test procedures of "compressed (ruptured) rated pressure", "rated axial load" and "flow fatigue tolerance". Structural integrity verification (see Table 1 of the.2008 edition); ● Format adjustments (see Table 1, Table 1 of the.2008 edition). This standard uses the translation method equivalent to ISO 11170..2013 "Test Procedures for Testing Performance Characteristics of Filters for Hydraulic Transmissions". The Chinese documents that have a consistent correspondence with the international documents referenced normatively in this standard are as follows. --- GB/T 14039-2002 Hydraulic transmission oil solid particle pollution level code (ISO 4406..1999, MOD); --- GB/T 14041.1-2007 Hydraulic filter element Part 1. Verification of structural integrity and determination of initial bubble point (ISO 2942..2004, IDT); --- GB/T 14041.2-2007 Hydraulic filter element Part 2. Test method for material and liquid compatibility (ISO 2943..1998, IDT); --- GB/T 14041.3-2010 Hydraulic filter element Part 3. Test method for crushing resistance (ISO 2941..2009, IDT); --- GB/T 14041.4-2019 Hydraulic transmission filter element Part 4. Test method for rated axial load (ISO 3723. 2015, MOD); --- GB/T 17446-2012 Vocabulary of fluid transmission systems and components (ISO 5598..2008, IDT); --- GB/T 17486-2006 Evaluation of pressure drop flow characteristics of hydraulic filters (ISO 3968..2001, IDT); --- GB/T 17488-2008 Hydraulic filter element uses particulate pollutants to determine anti-flow fatigue characteristics (ISO 3724..2007, IDT); --- GB/T 18853-2015 Multi-pass method for assessing the filtration performance of filter elements by hydraulic transmission filters (ISO 16889. 2008, MOD). The following editorial changes have been made to this standard. --- The name of the standard was changed to "Test procedure for inspecting performance characteristics of hydraulic transmission filter elements" to make it conform to the existing standards in China rule. This standard is proposed by China Machinery Industry Federation. This standard is under the jurisdiction of the National Hydraulic and Pneumatic Standardization Technical Committee (SAC/TC3). This standard was drafted. Xinxiang Pingfei Hydraulic Co., Ltd., Liming Hydraulic Co., Ltd., Aviation Industry (Xinxiang) Measurement Technology Co., Ltd. Division, Jiujiang Seventh Precision Electromechanical Technology Co., Ltd., Sinoma Science and Technology Co., Ltd., Northwest Nonferrous Metal Research Institute, Beijing University of Chemical Technology. The main drafters of this standard. Lu Jizhong, Han Xingmin, Zheng Yuan, Ma Pengjie, Wang Changhua, Yan Jie, Wang Jianyong, and Li Fangjun. The previous versions of the standards replaced by this standard are. --- GB/T 21486-2008.

Introduction

In a hydraulic transmission system, power is transmitted and controlled by means of a pressurized liquid in a closed circuit. The liquid is both a lubricant and It is a power transmission medium. The presence of solid particulate contaminants in hydraulic fluids will not only affect the lubrication performance of the fluid, but also cause component wear damage. The degree of particle contamination in the oil directly affects the performance and reliability of the hydraulic system, so it needs to be controlled to allow range. In order to achieve the above purpose, different methods can be used, one of which is to use a filter element installed in the filter housing for filtering. Filter element It is a porous element that performs the actual filtration process. The housing and the filter element are combined into a filter. The performance of the filter element is measured through tests, and a series of related national standards have been formulated. In order to improve the reliability of the use of filter elements, these standards Most of the standard test methods can be used to verify the performance characteristics of the filter element. Inspection performance characteristics of hydraulic transmission filter Test procedure

1 Scope

This standard specifies a test procedure for inspecting the performance characteristics of the filter element, which is used to check the hydraulic, mechanical and filter characteristics of the filter element. This standard does not apply to the qualification verification of filter elements with special requirements or specific working conditions. To perform these verifications, Special test procedures need to be developed, including actual use conditions (such as working fluids). The test procedures specified in this standard are applicable to filter elements using hydraulic oil or liquids with similar chemical properties as the working medium.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. ISO 2941 Test method for crush resistance (rupture) characteristics of hydraulic transmission filter elements (Hydraulicfluidpower-Filterele- ments-Verificationofcolapse/burstpressurerating) ISO 2942 Hydraulic structural integrity verification and determination of initial bubble point (Hydraulicfluidpower- Filterelements-Verificationoffabricationintegrityanddeterminationofthefirstbubblepoint) ISO 2943 Test Method for Compatibility of Hydraulic Transmission Filter Material and Liquid (Hydraulicfluidpower-Filterele- ments-Verificationofmaterialcompatibilitywithfluids) ISO 3723 Test Method for Axial Load of Hydraulic Transmission Filter Elements (Hydraulicfluidpower-Filterelements- Methodforendloadtest) ISO 3724 hydraulic drive filters use particulate pollutants to determine flow fatigue tolerance (Hydraulicfluidpower- Filterelements-Determinationofresistancetoflowfatigueusingparticulatecontaminant) ISO 3968 Evaluation of pressure drop flow characteristics of hydraulic drive filters (Hydraulicfluidpower-Filters- Evaluationofdifferentialpressureversusflowcharacteristics) ISO 4406 Hydraulic Transmission Fluid Solid Particle Pollution Degree Code (Hydraulicfluidpower-Fluids-Method forcodingthelevelofcontaminationbysolidparticles) ISO 5598 Vocabulary for Fluid Power Systems and Components ISO 16889 Multi-pass method for assessing the filtration performance of a filter element with a hydraulic drive filter ters-Multi-passmethodforevaluatingfiltrationperformanceofafilterelement) ISO 23181 Determination of Flow Fatigue Endurance with High Viscosity Hydraulic Oil for Hydraulic Transmission Filter Elements (Hydraulicfluidpower- Filterelements-Determinationofresistancetoflowfatigueusinghighviscosityfluid)

3 terms and definitions

The terms and definitions defined in ISO 5598 apply to this document.

4 Test samples

The filter element used in the test should be the same type as that of the common stock product. Some tests are destructive or make the filter element no longer suitable for subsequent tests. Therefore, a sufficient number of filter elements need to be prepared. Complete this standard The specified test procedure requires a minimum of 3 test filters.

5 Test procedure

5.1 Overview 5.1.1 Through the test procedures specified in this standard, the following filter element characteristics data can be provided. a) structural integrity (see ISO 2942); b) material and liquid compatibility (see ISO 2943); c) filter ratio (see ISO 16889); d) dirt holding capacity (see ISO 16889); e) crush (rupture) rated pressure (see ISO 2941); f) pressure drop flow characteristics (see ISO 3968); g) flow fatigue tolerance (see ISO 3724 or ISO 23181); h) Rated axial load (see ISO 3723); if it can be shown that this test has nothing to do with the design of the test element, filter element 2 (See 5.2.4 for numbering.) This test can be omitted. 5.1.2 The test shall be carried out in accordance with the procedure of Figure 1 (see 5.2.4 for the numbering method of the filter element), and shall meet the requirements of Table 1. Note. The purpose of the sequence is to complete the test procedure with the least number of tests. a See 5.2.4. Figure 1 Test procedure Table 1 Test requirements for verification of structural integrity and compatibility with materials and liquids Filter element serial number test item test procedure acceptance standard or reported data No. 1 filter (BP1a) Filter ratio According to ISO 16889, no first structural completion Integrity verification Particle size in μm (c) for ISO 16889 Prescribed βX (c) value Holding capacity according to ISO 16889 CR value Crush (rupture) preset pressure According to ISO 2941, do not do the first structural integrity Sexual verification No visible damage to structure, seals, or media As the pollutants increase, the slope of the pressure drop curve does not drop suddenly No. 2 filter (BP2a) Axial load rating According to ISO 3723, do not do the first structural integrity Verification and compatibility of materials and liquids No visible damage to structure, seals, or media As the pollutants increase, the slope of the pressure drop curve does not drop suddenly No. 3 filter (BP3a) Pressure drop flow characteristics according to ISO 3968 Flow fatigue tolerance Not according to ISO 3724 or ISO 23181 First structural integrity verification Pressure drop-flow curve No visible damage to structure, seals, or media As the pollutants increase, the slope of the pressure drop curve does not drop suddenly a See 5.2.4. 5.2 Structural integrity verification 5.2.1 Structural integrity verification of 3 filter elements in accordance with ISO 2942, failed to verify the filter element can not be used in subsequent tests. 5.2.2 Record the initial bubble point of each filter element. 5.2.3 The filter element is dried in a vacuum drying box or air-dried in a well-ventilated place. It is best to use a fume hood. Caution --- When drying the filter element soaked in low flash point solvent, please pay attention to safety. 5.2.4 Identify the three filter elements in turn according to the initial bubble point. The element with the lowest initial bubble point is identified as No. 1 (BP1). The high filter element is identified as No. 3 (BP3), so that the initial bubble point meets BP1 \u003cBP2\u003cBP3。 Make sure that these markings do not conflict with other markings on the element. 5.3 Material and liquid compatibility test Caution --- This inspection should take full account of national requirements for safe production. 5.3.1 According to the requirements of ISO 2943, warm the test solution and immerse the filter element. 5.3.2 Perform a visual inspection of the filter element, and its structure, seal, and filter material should not be damaged. Do not use any filter element damaged by inspection For subsequent tests. 5.3.3 The filter element is immersed in a clean solvent and repeatedly washed 3 times for 10 minutes each time. This solvent is compatible with the test solution and initial The bubble point test solution is compatible, and its pollution level should be better than or equal to-/ 11/9 level specified in ISO 4406. Then, the inner and outer surfaces of the filter element were cleaned by spraying with the same solvent filtered through a filter membrane having a pore size of 0.8 μm. Cleaned Try to be as careful as possible to avoid damaging the filter element. Needle injectors should be avoided, as needle injectors can damage filter materials. Use a fan sprayer. 5.3.4 Air-dry the filter element according to 5.2.3. Caution --- When drying the filter element soaked in low flash point solvent, please pay attention to safety. 5.3.5 Perform structural integrity verification of 3 filter elements according to ISO 2942. Unqualified filter elements shall not be used in subsequent tests. Select the filter element for the above test. Record all failed filters. 5.3.6 Record the initial bubble point of each filter element. 5.3.7 Air-dry the filter element according to 5.2.3. Caution --- When drying the filter element soaked in low flash point solvent, please pay attention to safety. 5.4 Other tests Use the procedure specified in Figure 1 and follow the requirements in Table 1 to complete the remaining tests on filter elements 1, 2, and 3. The test order of the three filter elements is not divided Sequentially (for example, the No. 2 filter element can be tested before the No. 1 filter element), but the test procedure of each filter element should be performed in accordance with the provisions of Figure 1.

6 Test report

Prepare test reports in accordance with the requirements of the standards for each completed test. The test report shall include all specified test reports And related test data. 7 Labeling instructions (when referring to this standard) When fully complying with this standard, the following can be stated in the test report, product catalog and sales documents. Test Procedure ".

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