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GB/T 35472.2-2017: Test method for friction element of wet automatic transmission -- Part 2: SZBL type friction test machine guidelines
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 35472.2-2017 | English | 119 |
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Test method for friction element of wet automatic transmission -- Part 2: SZBL type friction test machine guidelines
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GB/T 35472.2-2017
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Basic data | Standard ID | GB/T 35472.2-2017 (GB/T35472.2-2017) | | Description (Translated English) | Test method for friction element of wet automatic transmission -- Part 2: SZBL type friction test machine guidelines | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Q69 | | Classification of International Standard | 43.040.40 | | Word Count Estimation | 6,671 | | Date of Issue | 2017-12-29 | | Date of Implementation | 2018-11-01 | | Regulation (derived from) | National Standards Bulletin 2017 No. 32 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 35472.2-2017: Test method for friction element of wet automatic transmission -- Part 2: SZBL type friction test machine guidelines
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Test method for friction element of wet automatic transmission - Part 2. SZBL type friction test machine guidelines
ICS 43.040.40
Q69
National Standards of People's Republic of China
Wet Automatic Transmission Friction Elements Test Method
Part 2. Guidelines for the use of SZBL friction testing machines
Part 2.SZBLtypefrictiontestmachineguidelines
2017-12-29 Posted
2018-11-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
GB/T 35472 "wet automatic transmission friction element test method" is divided into the following seven sections.
--- Part 1. Terms and definitions;
--- Part 2. SZBL friction test machine use guide;
--- Part 3. Low speed power increment test method;
--- Part 4. High-speed power increment test method;
--- Part 5. Durability test methods;
--- Part 6. Test methods for the relationship between friction performance and pressure, speed and temperature;
--- Part 7. Belt friction test method.
This section GB/T 35472 Part 2.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This part is proposed by China Building Materials Federation.
This part of the National Non-metallic Mineral Products and Products Standardization Technical Committee (SAC/TC406) centralized.
This part of the drafting unit. Northwestern Polytechnical University, Xi'an Shun Electrical and Mechanical Technology Institute, Xianyang non-metallic mineral research and Design Institute Limited
the company.
The main drafters of this section. Fu Ye Wei, Zhu Mianpeng, Liu Xuegeng, Liu Yi, Shi Zhigang, Du Ming, Duan Yaping, Wen Jia Yu.
Wet Automatic Transmission Friction Elements Test Method
Part 2. Guidelines for the use of SZBL friction testing machines
1 Scope
GB/T 35472 of this part is SZBL-type friction testing machine as a guide to the implementation of the standard test equipment, test equipment, Code
Type test conditions and parameters, pre-test preparation for the provisions.
This section is mainly applicable to the inertia brake test equipment for friction element testing, but also for transmission or braking device and its
Analysis of the friction performance of his friction test equipment.
2 test equipment
2.1 with static joints SZBL type friction testing machine.
2.2 The flywheel provides the required kinetic energy.
2.3 Data acquisition frequency is greater than 1000Hz, the measurement accuracy corresponding to the following.
a) Torque measurement accuracy. not more than ± 0.5% of full scale;
b) Pressure measurement accuracy. no more than ± 0.5% of full scale;
c) Speed measurement accuracy. no more than ± 0.1% of full scale;
d) Oil temperature measurement accuracy, less than ± 1% of full scale.
2.4 Heaters and/or coolers are used to control the temperature of the test oil. Includes immersion or bushing heating to control cooling oil temperature
And configure the relevant components that control the external flow of cooling oil. If connected to an immersion heater, the flow can not be changed to ensure the heater
The power density is less than 2W/cm2.
2.5 piston seal can be sealed with fluorine rubber or Teflon ring.
2.6 test machine should be gravity lubrication, centrifugal lubrication and forced lubrication system.
2.7 adapter and washer. The internal spline connection friction plate, the outer spline connection pairs, the pressure plate connected to the piston, with a gasket to adjust the appropriate distance
With the gap. The test oil provides lubrication to the radial direction of the friction element through the oil hole of the internal spline. Pressure plate and gasket flatness does not exceed
0.013mm, the measurement point should be chosen as far as possible in the pressure plate and gasket on the outside.
2.8 Pneumatic system should meet the following requirements.
a) Dry air supply;
b) pressure regulator, adjustable air pressure;
c) gas flow meter should be configured to flow less than 300cm3/min;
d) Regularly inspect the lip seal to ensure that compressed air in the piston cavity will not leak to the test chamber through the lip seal
Oil inspection.
3 typical test conditions and parameters
3.1 Piston area of 15000mm2 ~.20000mm2.
3.2 piston effective stroke 4.0mm ~ 5.0mm.
3.3 Piston can load 0.25MPa ~ 1.00MPa pressure, pressure measurement control accuracy of ± 0.5%.
3.4 pressure plate pressure rate of 1.0MPa/s ~ 3.0MPa/s.
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