JB/T 6726.2-1993 Test method for internal combustion engine condensing radiator
Some standard content:
J96 | |tt | | JB | | tt | -29 Released
Ministry of Machinery Industry of the People's Republic of China
Released
Implemented on 1994-01-01
Machinery Industry Standard of the People's Republic of China
Internal combustion engine condensing type Radiator
Test method
Subject content and scope of application
JB/T6726.293
This standard cannot specify the test items and test devices for condensing radiators. Test conditions and requirements for analysis and compilation of test results. This standard applies to condensing radiators for internal combustion engines (hereinafter referred to as condensing radiators). 2 Reference standards
GB1195
GB1236
Radiator technical conditions
Ventilator aerodynamic performance test method
JB/T6726.1 Internal combustion engine cold heat dissipation Device technical conditions 3 test items
3.1 Air tightness performance test.
3.2 Working performance test of the compound water filler cover. 3.3 Flow performance test.
3.4 ??Heat dissipation performance test.
3.5 vibration resistance test.
3.6 Heat-resistant pressure pulse performance test.
4 Air Tightness Performance Test
4.1 Test Device
The simplified diagram of the device is shown in Figure 1
Pressure melting air
Simple diagram of the air tightness test device Figure
Figure 1
1 pressure gauge; 2 - water tank, 3 - water inlet valve, 4 gas pipeline, 5~ rubber stopper or special water cap with air guide pipe, 6 - wrinkle inspection Lingyao device, 7 one bolt, 8 one gasket: 9-metal plate, 10-drain valve. Approved by the Ministry of Machinery Industry on 1993-07-29
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Implemented on 1994-01-01| |tt||4.2 Test system
JB/T 6726. 293
Installation requirements: The sealing at the lower end of the condenser and the water inlet should be reliable and shall not fail due to gas pressure; a.|| tt | .Pressure holding time: 30s.
4.3 Testing content and method
Check whether there is gas leakage on the water side of the condenser under pressure to generate bubbles during the pressure holding period. For intermittent bubbles, retest every half an hour.
5 Duplex water filling port cover working performance test
According to the provisions of Appendix B (Supplement) of GB1195. 6 Flow-through performance test
6.1 Test device
The simplified diagram of the flow-through and heat dissipation performance test device is shown in Figure 2. 12
hundred
Ink slip aisle|| tt | 5 - passing section, 6 - heating water tank, 7 - condenser to be inspected, 8 - adjustable water heater, 9 - transition section, 10 - external fan: 11 - adjustment motor: 12 - thermopile and DC potential difference Gauge, 13 - Differential pressure gauge: 14 - Thermometer 6.1.1 The axial position and straight section length of the over-plated section on both sides of the condenser under inspection, where the temperature and pressure difference are measured, and the length of the straight section are as specified in Figure 3. Air flow square
100
100
Figure 3 Axial arrangement of transition section (unit: mm) 1 - thermometer, 2 - thermoelectric pusher; 3 - pressure measuring point; 4 - quilt Inspect the condenser JB/T6726.2-93
6.1.2 The pressure measurement points are symmetrically distributed around the measurement section and connected to the pressure difference meter through the main pipe. The diameter of the pressure measuring hole is 3mm and the orifice is flat. Smooth, without burrs or protrusions, and its axis is perpendicular to the pipe wall. 6.1.3 The heating elements of the air heater should be evenly distributed along the section. 6.1.4 The top of the thermometer for measuring air temperature should be placed in the center of the section being measured. 6.1.5 The air duct should comply with the regulations on "duct type air intake test device" in GB1236. 6.2 Test parts | |tt | And filled with clean water; water temperature: room temperature:
Air volume is specified in Table 1;
Table 1
12h power of supporting engine
kw
Air volume|| tt||kg/h
Flat radiator
Non-flat radiator
410
370
4
540
490
5
680
610
6
820
740
Note; Power If the value contains decimals, please consult a doctor to adjust it to the nearest power level listed in the table, rheumatism: 25~35℃
7
950
860.
8
1090
980
9
1220
1100
6.3 Detection of internal guests and methods||tt ||Air volume, measured and calculated according to the relevant provisions of GB1236, and should comply with the provisions of Table 1, kg/h; a.
b.
c
Air temperature, ℃,
The absolute value of the wind pressure difference on both sides of the condenser is the condenser wind resistance, Pa. 7 Heat dissipation performance test
7.1 Test device
The simplified diagram of the device is shown in the figure. 2.
7.1.1 The thermometer for measuring the water temperature of the condenser should be located in the center of the water inlet, and the top of the temperature-sensing part should be close to the upper main plate. 7.1.2 There should be no less than 20 pairs of thermopile, and they should be evenly distributed. On the temperature measurement section. 7.2 Test conditions
a.
b.
c.
d.
e.
Installation Requirements: Same as 6.2a;
Air volume: as specified in Table 1;
Inlet air overflow: 40±0.5℃;
Water temperature, 96±0.5℃; ||tt| |The test is carried out in the open state (that is, the water side of the condenser is directly connected to the atmosphere). 7.3 Testing content and method
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1500
1350
14|| tt | | 1900 | | tt | | 1710 | Measure the following contents when the thermal force is level: a.
b.
c
d.
air volume, kg/h;
air inlet Temperature, ℃:
Water temperature, ℃;
Potential difference between the thermopile before and after the cooler, mV. 7.4 The heat dissipation basis is calculated according to formula (1):
UU/a
In the formula, U
The average potential difference on both sides of the condenser at thermal equilibrium, mV: The two sides of the condenser at thermal equilibrium The measured potential difference on the side, mV; U
Number of thermocouple pairs in the thermopile:
8
(1)
JB/T 6726. 2 -93| |tt|| From the "potential-temperature" comparison table of the thermoelectric silk material and the potentiometer, find the overflow value relative to △U, which is the air temperature difference between the two condensers, C, and the heat dissipation of the condenser according to the formula (2) Calculation: Q = 0.001GA
Where: Q - heat dissipation of condenser, MJ/h: G
- air volume, kg/h;
A - condensation The air temperature difference on both sides of the device, ℃.
8 Vibration resistance performance testWww.bzxZ.net
8.1 Test device
The schematic diagram of the device is shown in Figure 4,
Figure 4 schematic diagram of the vibration resistance test device
1 -Motor: 2-base, 3-vibration drive mechanism, 4-acceleration sensor: 5 one plate, 6-column; 7-condenser to be inspected 8.2 Test conditions
+(2)
Installation requirements: Inspect the lower end of the condenser and fasten it with the sealing gasket and metal plate with bolts. After filling it with clean water, install it on the platform of the test device a.
;
b. Vibration frequency, 50Hz;
c. Acceleration peak: 40m/s*;
Number of vibrations: 10° times.
d.
8.3 Inspection content and methods
Check the condenser for cracks, desoldering, water leakage, and deformation that may affect installation and use. During the test, if leakage or stagnation is found, the accumulated test time can be recorded, and the air tightness performance test can be used for review. If it is a misjudgment, the test should be continued.
9 Heat-resistant pressure pulse performance test
9.1 Test device
The simplified diagram of the device is shown in Figure 5.
Pressing wax air
Atmosphere
u
Figure 5 Simplified diagram of the heat-resistant pressure pulse test device 1-three-way valve; 2-pressure gauge; 3-gas pipeline: 4-steam-water separator: 5-with sealing plug Special water cover; 6-drum inspection condenser, 7-thermometer: 8-such as hot water tank, 9-adjustable water heater JB/T 6726.293
9.2 test components
a. Installation requirements: The lower end of the inspected condenser should be fastened to the sealing gasket and heating water tank with a butterfly bolt, and filled with clean water. The air pipe and the special water inlet cover should be reliably sealed;
b. Peak pressure: force =1.5 p | | tt | :90±5℃;
Number of cycles: 3×10° times.
9.3 Testing content and methods
Same as 8.3,
Instruments, meters and accuracy requirements
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Test instruments and meters should be calibrated to be qualified . 10.1
10.2 The gas pressure is measured with a metal bullet pressure gauge or other measuring instrument. When testing the working performance of the double water filling port cover, the accuracy of the instrument should not be lower than level 0.5, and the accuracy of other tests should not be lower than level 1. 10.3 The wind is measured with a wind gauge and a micromanometer. The graduation value of the micromanometer should not be greater than 0.1Pa. 10.4 | | tt | The value should not be greater than 10Pa: The temperature should be measured with a digital thermometer, mercury thermometer, alcohol thermometer or other measuring instrument, and its graduation value should not be greater than 0.5C. The wind temperature difference is measured with a thermopile and a DC potentiometer. The graduation value of the DC potentiometer should not be greater than 0.05mV. The rotation speed is measured with a tachometer, tachometer or other measuring instrument, and its accuracy should not be lower than level 1. The frequency is measured with a counter, time-to-time ratio or other measuring instrument, and its accuracy should not be less than ±1. Time is measured with a stopwatch.
10.10
11
Acceleration is measured with an accelerometer, and its accuracy should be no less than level 1. Result analysis and documentation
into a file, the file content includes: a.
b.
c.
d.
e.
f.
g .
h.
Test name:
Model and quantity of the condenser to be inspected, sample supply unit and method; Test content:
Simplified diagram of the test device and main instruments , Equipment: test results and data compilation;
Analysis and conclusion:
Testing unit, test location, date and main test personnel; attachments, test records.
Additional notes:
This standard is proposed and administered by the Shanghai Internal Combustion Engine Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Shanghai Internal Combustion Engine Research Institute of the Ministry of Machinery and Industry and Xiangshui Radiator Factory. The main drafters of this standard are Xu Yinhu, Jin Ruikang, and Sun Dianyou. 10
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