1, rain test is divided into the pendulum type rain test and sprinkler type rain test
2, rain test is applicable to aviation, automotive, home appliances, external lighting and signaling devices and automotive lamps and lanterns shell protection.
3, rain test standards are:
GB 4208-2008
GB10485-89
GJB150.8-86
GJB 150.8 rain test standards
(1) Scope and purpose of the test
GJB 150.8 applies to Military equipment that may encounter rain environment, not applicable to do rain corrosion test, also not applicable to assess the adaptability of aircraft windshield rain remover.
It is well known that military equipment, whether in working condition or in storage, will be affected by various kinds of water to varying degrees, of which the most common is affected by rain, and some of the equipment, though protected against rain, will also be affected by condensation or leakage of water exposed on its upper surface.
When it rains, it can have a variety of effects on military equipment and its materials due to the infiltration, flow, impact and accumulation of rainwater. For example, heavy rainfall can interfere with the propagation of radar signals; heavy raindrops can erode the surface of
high-speed airplanes and missiles; and rainwater can penetrate the interior of equipment and destroy its structure and components. Therefore, the impact of rainfall on products cannot be ignored.
The purpose of the rain test for military equipment is to determine the ability of the enclosure to prevent rainwater penetration under rain conditions and the effectiveness of the equipment when or after it has been subjected to rain.
It is used primarily to determine:
a. the effectiveness of the protective cover or shell against rain penetration;
b. the ability of the equipment to meet its performance requirements during or after exposure to rain;
c. physical damage to the equipment as a result of rain;
d. the effectiveness of the rainwater removal system.
(2) Test conditions
The test conditions of GJB 150.8 are given in terms of three different test procedures, i.e., the rainfall test with a wind source, the drip test, and the water resistance test.
a. Rainfall test with wind source Mainly simulates wind-blown rain during natural rainfall. Applicable to outdoor use and there is no rain protection measures for the equipment, the main rain parameters include:
Rainfall intensity Minimum 10 cm / h;
Droplet diameter 0.5 ~ 4.5 mm;
Horizontal wind speed of not less than 18 m / s;
Test duration of 30 min;
Temperature of the specimen The start of the rain test for each 30 min At least 10°C above the rain temperature;
Test water Water Water from a local source.
b. Dripping rain test Mainly simulates dripping water. Applicable to equipment that is protected from rain but may have condensation or leakage water on the exposed upper surface. Its main rain parameters include:
Drop diameter 0.5 ~ 4.5 mm;
Drip volume not less than 280 +30-0 L/m2.h;
Test time 15 min
c. Waterproofing test is not to simulate the natural precipitation, but to assess the waterproofness of the equipment subjected to waterproofing to provide a high degree of confidence in the waterproofness of the equipment. Provide a high degree of confidence for the waterproofness of the equipment. Applicable to large-scale test equipment, wind source rain test can not meet the test requirements. Its main rain parameters include:
Droplet diameter 2 ~ 4.5 mm;
Nozzle pressure not less than 375 kPa;
Test time 40 min
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GB/T automobile rain test standard
Published: 2012-06-13 10:03:38
The rain test standard retains the part of QC/T4449-19999 that has been practically proved to be suitable for our country's situation when revising QC/T4449-19999 "Test Methods for the Performance of Thermal Insulated Vehicles and Refrigerated Vehicles". For the test of the basic performance of the vehicle, basically the latest version of the national standard, and the reliability test to failure mode as the basis for assessment, for the compartment special performance test, mainly on the air leakage times and heat transfer coefficient and static temperature regulation and other tests have been changed in order to make it more reasonable, in line with the international norms.
The rain test standard from the date of implementation, while replacing the QC/T4449-19999.
This standard appendix A and appendix B are the standard appendix.
This standard is proposed by the State Bureau of Machinery Industry.
This standard by the national automobile standardization technical committee under the centralization.
This standard drafting unit: zhenjiang fei chi automobile group limited liability company, jinan kogel special automobile co.
The main drafter of this standard: Zou Chunxi, Gao Youle, Chen Renkui, Zhang Changjing, Han Jiyin.
The Chinese people*** and the national automobile industry standard QC/T 449-2000
The insulated truck, refrigerated truck performance test methods instead of QC/T449-1999
1 . Rain test standard scope
This standard specifies the insulation truck, refrigerated truck test methods. Rain test standard applies to the use of stereotyped automobile chassis modified insulation and refrigerated trucks (this standard refers to the mechanical refrigeration refrigerated
car) and insulation semi-trailer, refrigerated semi-trailer, other similar models can be referred to the implementation.
2. Rain test standard reference standards
The following standards contain provisions, by reference in this standard and constitute the provisions of this standard. When this standard is published, the version shown is valid. All standards are subject to revision, the use of this standard parties should explore the possibility of using the latest version of the following standards.
GB l496-1979 Motor vehicle noise measurement methods
GB l4761-1999 Vehicle emission pollutant limits and test methods
GB 3847-1999 Compression-ignition engines and vehicles equipped with compression-ignition engines exhaust visible pollutant limits and test methods
GB/T 12534- 1990 General Principles for Road Test Methods for Automobiles
GB/T 12536-1990 Test Methods for Vehicle Skidding
GB/T 12538-1990 Methods for Determining the Height of the Center of Gravity of Vehicles
GB/T 12539-1990 Test Methods for Vehicles Climbing Steep Grades
GB/T 12543-1990 Test Methods for Acceleration Performance of Vehicles
GB/T 12543-1990 Test Methods for Acceleration Performance of Vehicles
GB/T 12545-1990 Test Method for Fuel Consumption of Vehicles
GB/T 12540-1990 Test Method for Determining the Minimum Turning Diameter of Vehicles
GB/T 12544-1990 Test Method for Maximum Vehicle Speed of Vehicles
GB/T 12547-1990 Test Method for Minimum Stable Vehicle Speed of Vehicles
GB/T 12547-1990 Test Method for Minimum Stable Test Method for Minimum Stable Speed of Vehicles
GB/T 12673-1990 Measurement Method of Main Dimensions of Vehicles
GB/T 12674-1990 Method for Determination of Mass (Weight) Parameters of Vehicles
GB l2676-1999 Structure, Performance and Test Method of Vehicle Brake System
QC/T 252-1998 Test Procedure for Specialized Vehicles Sizing test specification
QC/T 450-2000 Thermal insulation truck, refrigerated truck technical conditions
QC/T 589-1999 van-type automobile product quality inspection and evaluation methods
3. Standard test conditions for rain test
The test conditions and test preparation for thermal insulation truck and refrigerated truck are in accordance with the provisions of GB/T12534.
4 test methods
The measurement of dimensional parameters of heat preservation trucks and refrigerated trucks is carried out according to the provisions of GB/T12673.
The measurement of the center of gravity height of the heat preservation truck and refrigerated truck is carried out according to the provisions of GB/T12538.
The measurement of quality parameters of heat preservation vehicle and refrigerated vehicle is carried out according to the provisions of GB/T12674.
4.4 Maximum speed test is conducted according to the provisions of GB/T1254
44.
4.5 Acceleration performance test according to the provisions of GB/T12543.
4.6 Minimum stabilized speed test according to the provisions of GB/T12547.
4.7 Climbing steep slopes test according to the provisions of GB/T12539.
4.8 Fuel consumption test shall be conducted in accordance with the provisions of GB/T12545.
4.9 Skidding test is conducted according to the provisions of GB/T12536.
4.10 insulated trucks, refrigerated trucks brake test GB12676 provisions.
4.11 insulated trucks, refrigerated trucks minimum turning diameter test according to the provisions of GB/T12540.
4.12 noise measurement according to the provisions of GB1496.
4.13 The measurement of emissions from gasoline vehicles is carried out in accordance with the provisions of GB14761; the measurement of emissions from diesel engines is carried out in accordance with the provisions of GB3847
.
4.14 Reliability driving test.
41.42.43.
4.14.1 Drenching Test Standard Test Purpose
To assess the working reliability of the compartment and refrigeration unit, compartment and chassis and their connections.
4.14.2 Test Methods
The test mileage and mileage distribution QC/T252 provisions for the test, the test according to QC/T589-19
999 in the provisions of 5.5 of the protection
warmer trucks, refrigerated trucks appeared in the failure to classify and statistics.
4.15 rain test
4.15.1 purpose of the test
To assess the sealing performance of the compartment and the refrigeration unit electrical control box.
4.15.2 Standard test conditions for rain test
The rain test is carried out in a specially set up rain room. Cabin door, refrigeration unit electrical control box door is normally closed, gasoline
or diesel engine-driven refrigeration unit must be blocked its exhaust pipe.
4.15.3 test method
Drenching test, rainfall intensity of 5 to 7m
mm/min, the direction of 45 ° angle with the plumbing, the carriage and electrical control box for
30min rain test, after the test to dry the compartment and the control box of the external water, open the door, check the various parts of the, there should be no water and leakage
Evidence.
Image.
4.16 airtightness test
4.16.1 purpose of the test
The assessment of the airtightness of the compartment, the measurement of air leakage should be arranged after the rain test.
4.16.2 test conditions
The test site can control the ambient temperature of the artificial climate chamber sunshade and no other heat sources affect the indoor or equivalent natural environment compartments, unloaded, clean interior, floor drain holes, evaporator drain holes pre-blocked, the door and the ventilator is in a normal state of closure
Pressure difference between inside and outside of the compartment (100 ± 10) Pa Temperature sensing element layout from the top of the car outside the center above and inside the car floor above 0.1m each set a temperature measurement point, inside and outside the car temperature
In 288 ~ 298K range, each temperature sensing element stabilized at ± 1.5K, the temperature difference between the components is not greater than 3K greater than 273K, each temperature sensing element stabilized at ± 3K
4.16.13 test equipment
4.16.13 test equipment
a) Temperature difference (100 ± 10Pa) p>
a) thermometer, temperature sensing element;
b) differential pressure gauge;
c) flow meter;
d) pressure gauge;
Test instrument accuracy see appendix A (appendix to the standard).
4.16.4 test method
Drenching test standard with the pressurization method using a gas source to pressurize the interior of the compartment, is the pressure difference between the inside and outside of the compartment to meet the specified requirements, and to ensure a stable gas supply.
Test conditions are established and stabilized, the air flow measurement, every 5min measurement, the number of consecutive measurements shall not be less than 6 times.
4.16.15 Data processing
Test results are entered in Appendix B (standard appendix) Table B1, the measured flow rate should be converted to standard conditions (273K, 1.013 × 105Pa) under the flow rate of the volumetric flowmeter using the formula (1) to be corrected. For other flow meters should also use the corresponding correction method, the measurement results converted to standard conditions of the flow.
V = (P0T/PT0) V0 where: V - the standard state of the leakage, m3 / h; V0 - the flowmeter measured by the leakage, m3 / h; T -standard state absolute temperature, 273K; T0 - flow measurement at the absolute temperature of the air, K; P - standard atmospheric pressure 1.013 × 105Pa; P0 -- absolute pressure of air at the flow measurement, Pa.
4.17 Thermal insulation performance test
4.17.1 Purpose of the test
The assessment of the thermal insulation performance of the compartment shall be arranged after the airtightness test.
4.17.2 test conditions
Shade and no other heat sources affecting the indoor or equivalent test site can control the ambient temperature of the artificial climate chamber conditions of the natural environment air velocity from the outside surface of the compartment at 0.1m is not greater than 2m/s compartment unloaded, the interior is clean, dry, the floor drain holes and evaporator drain holes in normal use, the door and the ventilating device is closed in the normal way. The doors and ventilators are closed in the normal way.
The rain test standard temperature sensing element layout
Located at 0.1m from the inside and outside surface of the car, inside and outside the car 8 top corners and inside and outside the car each 4 longitudinal surface of the center of each one, inside and outside of each of the 12 measuring points located in the interior and exterior of the car from the car at 0.1m, inside and outside the car in the center of each of the 6 surfaces of each one of the 6 points inside and outside of each one of the temperature averaged wall temperature 293 ~ 298K not higher than 308K. 298K is not higher than 308K inside and outside the compartment temperature difference is not less than 20K
The temperature outside the compartment temperature sensing element maximum temperature difference is not greater than 2K, the average temperature difference is not greater than 1.5K
The temperature difference of temperature-sensitive elements is not greater than 3K, the average temperature is stable in ± 1.5 temperature inside the compartment
The temperature sensing element maximum temperature difference is not greater than 3K, the average temperature difference is not greater than 1.5K temperature sensing element temperature difference is not greater than 3K, the average temperature difference is not greater than 1.5K. Element temperature difference is not greater than 3K, the average temperature stabilized at ± 1.5K within the electric power fluctuations in the maximum heating power and the minimum heating power difference is not greater than 3% of the minimum heating power
4.17.3 Test Instruments
a) Wattmeter;
b) thermometers, sensing elements;
c) anemometer.
The accuracy of the test apparatus is shown in Appendix A.
4.17.4 Test Methods
The standard test for the drenching rain test is the internal heating method, and the operating temperatures of all heaters in the test shall be at the lowest possible value to minimize the effect of thermal amplitude. In order to ensure that the temperature inside the compartment in accordance with the requirements of Table 2, you can use a fan or several fans, its air volume to adequate circulation is appropriate, each temperature-sensitive components should be thermal radiation protection measures. Reach the test conditions after stabilization 1h to start measuring, measuring every 15min, continuous testing time of not less than 4h, in the entire test process, the temperature inside and outside the compartment and the total heating power shall not monotonically rise or fall.
4.18 Static thermoregulation performance test
4.18.1 Purpose of the test
To determine the function of the refrigerated truck to maintain the rated internal temperatureèi under the condition of the given external temperatureèe when it is static.
4.18.2 Test conditions
The test is divided into three levels, of which the third level test is only used for the factory test see table 3, of which the third level test
is only used for the factory test.
The rain test standard can control the ambient temperature of the artificial climate chamber without direct sunlight and other heat effects of the room equivalent conditions of the natural environment of the natural environment of the shade without rain.
Air velocity from the outer surface of the compartment at 0.1m is not greater than 2m / s
Cabin empty, new car, door and ventilator closed in the normal way, the floor drainage holes and evaporator drain holes in normal use
Drenching rain test standard temperature sensing element layout
In addition to the arrangement of the provisions of Table 2, and another in the evaporator air import and export of the uniformly distributed four
In addition to the arrangement stipulated in Table 2, there are 2 temperature sensing elements evenly distributed at the air inlet and outlet of the evaporator, and 1 temperature sensing element inside and outside the compartment. The temperature outside the compartment is stabilized at (303± 0.5)K, and the temperature difference between the sensing elements is not more than 2K. 3K
The temperature outside the compartment is not less than 273K, and the temperature inside and outside the compartment is not more than 5K.
4.18.3 Test Instruments
a) Wattmeter
b) Thermometer, temperature sensing element;
c) Anemometer.
4.18.4 Type inspection test method
4.18.4.1 This test is carried out after determining the amount of air leakage and the rate of heat leakage from the compartments;
4.18.4.2 Drenching rain test standard in the absence of additional heat load, the refrigeration test is carried out, and then the additional heat load is added and the refrigeration unit continues to run.
4.18.4.3 The operation of the refrigeration unit equipment shall be run with the fluctuation of the internal temperature (thermostat adjustment temperature QC/T450-20000 in 4.3.17 of the provisions) for more than 2h, and then put into the additional heat load Qa produced by the additional heaters (including fans), to re-establish the test conditions to achieve equilibrium and stabilization, and thereafter continue to run for more than 2h. In the above two running period, with a gap of not more than 15min to measure the temperature of the inside and outside of the compartment at each point of measurement, as well as the power consumption of the heater and fan.
Standard Measurement Parameters for Drenching Test
Maximum Allowable Measurement Error
Test Level
Level I, II, III
Surface Area 0.5%, 1%, 1%
Air Pressure 3%, 3%, 5%
Air Flow 3%, 3%, 5%
Air Temp. 1.0
Electrical power 0.5% 1% 1%
Air velocity 3% 3% 5%