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GB/T 41980.1-2022: Hydraulic fluid power - Determination method of pressure ripple levels generated in systems and components - Part 1: Hydraulic pumps(precise method)
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Hydraulic fluid power - Determination method of pressure ripple levels generated in systems and components - Part 1: Hydraulic pumps(precise method)
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GB/T 41980.1-2022
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Basic data | Standard ID | GB/T 41980.1-2022 (GB/T41980.1-2022) | | Description (Translated English) | Hydraulic fluid power - Determination method of pressure ripple levels generated in systems and components - Part 1: Hydraulic pumps(precise method) | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J20 | | Classification of International Standard | 23.100.10 | | Word Count Estimation | 26,269 | | Date of Issue | 2022-10-14 | | Date of Implementation | 2022-10-12 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 41980.1-2022: Hydraulic fluid power - Determination method of pressure ripple levels generated in systems and components - Part 1: Hydraulic pumps(precise method)
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Hydraulic fluid power -- Determination method of pressure ripple levels generated in systems and components -- Part 1.Hydraulic pumps(precise method)
ICS 23.100.10
CCSJ20
National Standards of People's Republic of China
in hydraulic transmission systems and components
Determination of pressure fluctuations
Part 1.Hydraulic Pumps (Precision Method)
2022-10-12 Released 2022-10-12 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
directory
Preface I
Introduction II
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Meter 3
5 Installation of the pump 3
6 Test Conditions and Setup 4
7 Test bench 5
8 Test procedure 8
9 Test report 10
10 Notes (in accordance with this document) 11
Appendix A (Informative) Dual Pressure/Dual System Method 12
Appendix B (Normative) Test Form 17
Reference 22
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
drafted.
This document is the first part of GB/T 41980 "Determination of pressure fluctuations in hydraulic transmission systems and components". GB/T 41980
The following sections have been published.
--- Part 1.Hydraulic pumps (precision method);
--- Part 2.Hydraulic pumps (simplified method).
This document is modified using ISO 10767-1.2015 "Determination of pressure fluctuations in hydraulic transmission systems and components - Part 1.Determination of pumps
Methods of Source Flow Pulsation and Source Impedance.
The technical differences between this document and ISO 10767-1.2015 and their reasons are as follows.
--- Replaced ISO 5598 (see Chapter 3) with the normatively cited GB/T 17446 to adapt to my country's technical conditions and increase the operability
action;
--- Changed "the instrument does not need to respond to steady-state pressure" to "the instrument should not be affected by steady-state pressure" (see 4.2), the expression is more accurate;
--- Change the magnetic gap detector that measures the rotational speed of the drive motor to a sensor (see 6.4, Figure 4) to adapt to the technical conditions of our country;
--- Added "Pipeline should be fixed with pipe clamps" (see 7.6.1) to adapt to the technical conditions of our country;
--- Change the dynamic pressure measurement requirements to use piezoelectric pressure sensors to dynamic pressure sensors, and change the static pressure measurement requirements to use
Changing from piezoresistive pressure sensor or strain pressure sensor to static pressure sensor does not limit the pressure sensor principle
(see 7.7) to adapt to the technical conditions of our country;
--- Changed the diagram and description of the hydraulic test circuit and measurement system of the dual pressure/dual system method (see Figure 4) to adapt to our country's technology
condition.
The following editorial changes have been made to this document.
--- In order to harmonize with existing standards, the name of the standard is changed to "Determination of Pressure Fluctuations in Hydraulic Transmission Systems and Components Part 1"
Part. Hydraulic Pump (Precision Method)";
--- Redrawing Figure 2 according to GB/T 786.1-2021 (see 7.1);
--- Adjusted the appendix number and order;
--- Change the pressure unit bar in Appendix B to MPa;
--- Change "see Chapter 9" in Table B.1 to "see Chapter 10".
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed by China Machinery Industry Federation.
This document is under the jurisdiction of the National Hydraulic Pneumatic Standardization Technical Committee (SAC/TC3).
This document was drafted by. Yanshan University, Zhejiang University, Hefei Haiyuan Machinery Co., Ltd., Xiamen University, Beijing Huade Hydraulic Industry Group
Co., Ltd., Taizhong Group Yuci Hydraulic Industry Co., Ltd., Hunan Welllead Technology Co., Ltd., Shanghai Qiulin Machinery Co., Ltd.,
Qingdao Leikechuan Hydraulic Machinery Co., Ltd., Taiyuan University of Science and Technology, Shanghai University of Engineering Technology, Foshan Yongheng Hydraulic Machinery Co., Ltd., Guangdong
Tianheng Hydraulic Machinery Co., Ltd., Beijing Machinery Industry Automation Research Institute Co., Ltd.
The main drafters of this document. Cai Wei, Zhao Jingyi, Xu Bing, Shen Sihai, Hou Liang, Ye Shaoqian, Yang Guangwen, Zhao Liquan, Yang Huijie, Zhang Hongliang,
Wang Jinbo, An Gaocheng, Wang Zhaoqiang, Xie Jianhua, Zhang Fu, Cao Qiaohui, Compass.
Introduction
GB/T 41980 "Determination of pressure fluctuations in hydraulic transmission systems and components" aims to standardize pressure waves in hydraulic systems and components
The dynamic measurement method consists of three parts.
--- Part 1.Hydraulic pumps (precision method). A test designed to determine source flow pulsation and source impedance for measuring positive displacement hydraulic pumps
program.
--- Part 2.Hydraulic pumps (simplified method). The purpose is to determine the test procedure for measuring the accuracy of a positive displacement hydraulic pump without high requirements.
--- Part 3.Hydraulic motors. The purpose is to determine the test procedure for the hydraulic motor under steady state conditions.
If the source flow pulsation and source impedance of the hydraulic pump are known, the pressure fluctuations generated by the pump in the hydraulic system can be determined by using the system components
The known harmonic propagation characteristics are simulated. This document establishes the measurement process of hydraulic pump source flow pulsation and source characteristic impedance for
The design of low-noise hydraulic systems helps.
Since the source flow pulsation and source impedance of hydraulic pumps are extremely important for the design of low noise pumps and hydraulic systems, ISO 10767-1.1996
The use of the "secondary source method" measurement is proposed in this test procedure, in which a determined secondary pulsation source is used to generate large pulses in the test system.
However, it requires the use of complex test systems and signal processing techniques, which is relatively difficult to implement, and is only adopted by the sponsoring country, the United Kingdom. therefore
ISO 10767-1.2015 adopts the method proposed by Weddfelt and Kojima, only based on the measured pressure fluctuation of the pump under test, simplifying the test system and
Signal processing method, and can achieve higher precision, Appendix A gives the theoretical basis of this method.
in hydraulic transmission systems and components
Determination of pressure fluctuations
Part 1.Hydraulic Pumps (Precision Method)
1 Scope
This document establishes a test procedure for source flow pulsation and source impedance of positive displacement hydraulic pumps.
This document applies to all types and sizes of volumes with pumping frequencies in the range of 50 Hz to 400 Hz under steady state conditions
type pump.
This document uses the calculation of high impedance pressure fluctuations as an example. The methodology and rationale for the test procedure are explained in Appendix A. Measurement
The test procedure is called the dual pressure/dual system method. The ratings are as follows.
a) source flow pulsation (in standard Norton model) amplitude (m3/s) and phase (°) over 10 individual pump frequency harmonics;
b) source flow pulsation (in the corrected model) amplitude (m3/s), phase (°) and time-domain waveforms for more than 10 individual pump frequency harmonics;
c) source impedance magnitude (N s/m5) and phase (°) for more than 10 individual pump frequency harmonics;
d) High impedance pressure fluctuations (MPa) over 10 individual pumping frequency harmonics, rms square of pressure fluctuation harmonics f1~f10
mean.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GB/T 17446 Vocabulary of Fluid Transmission Systems and Components (GB/T 17446-2012, ISO 5598.2008, IDT)
3 Terms and Definitions
GB/T 17446 as well as the following terms and definitions apply to this document.
3.1
sourceflowripple
The flow pulsation component generated in the pump (independent of the characteristics of the connecting circuit).
Note 1.Since there are two definitions of pump source flow pulsation, they need to be used differently.
--- The source flow pulsation in the standard Norton model, QS is the source flow pulsation assumed to be generated at the pump outlet, as shown in Figure 1a);
--- Correct the source flow pulsation in the model, Q*S is the source flow pulsation assumed to be inside the end of the outlet pipe, as shown in Figure 1b).
Note 2.According to the size and structure of the pump, the physical properties and operating conditions of the fluid, the theoretical pump source flow pulsation and correction model calculated by computer simulation
The pump flow pulsation in Q*S is comparable.
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