JB/T 6723.4-1999 Internal combustion engine cooling fan Part 4: Test method for condensing internal combustion engine cooling fan
Some standard content:
ICS27.020
J96
JB
Machinery Industry Standard of the People's Republic of China
JB/T6723.3~6723.4-1999
Internal combustion engine cooling fan|| tt |
Foreword
This standard is part of the JB/T6723 "Internal Combustion Engine Cooling Fan" series of standards. This series of standards includes the following four parts: JB/T6723.1—1993
Internal Combustion Engine Cooling fan
3 Internal combustion engine cooling fan
JB/T6723.2—1993
Internal combustion engine cooling fan
JB/T6723.3—1999
No. 1 Part: Metal cooling fan technical specifications Part 2: Plastic cooling air technical specifications
Part 3: Condensing internal combustion engine cooling fan technical specifications Part 4: Condensing internal combustion engine cooling fan JB/T6723.4-1999 Internal combustion engine Cooling fan test method
Appendix A of this standard is a reminder appendix.
This standard is proposed and coordinated by the National Internal Combustion Engine Standardization Technical Committee. This standard was drafted by: Shanghai Internal Combustion Engine Research Institute, Changzhou Diesel Engine Factory Governor Branch. The main drafters of this standard: Jin Ruikang, Xu Yanping, Zhou Feng, Jia Zhensheng, Jiang Nanqin, Liu Xinglong. Machinery Industry Standard of the People's Republic of China
Internal combustion engine cooling fan
Part 4: Test method for cooling fan of condensing internal combustion engines Part 4: Testmethod for cooling fan of condensing engines Scope||tt| |JB/T6723.4-1999
This standard specifies the test items, methods, content, data calculation, result analysis and documentation requirements for condensing internal combustion engine cooling fans.
This standard applies to two types of cooling fans for condensing internal combustion engines with and without generators (hereinafter collectively referred to as fans) 2 Referenced Standards
The provisions contained in the following standards are adopted in this standard The referenced text constitutes a provision of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB/T 12361985
GB/T 4942.1—1985
JB/T 6723.3—1999
3 test items
test items include:
a) Fan performance;
b) Fan noise;
c) Electrical performance:
d) Durability.
4 Fan Performance
4.1 Test Requirements and Methods
Ventictor Aerodynamic Performance Test Method
Motor Housing Protection Classification
Internal Combustion Engine Cooling Fan Part 3 : Condensing internal combustion engine cooling fan technical conditions 4.1.1 The test uses the device shown in Figure 1. The device consists of two parts: a hairdryer and a balancing motor. The wind turbine should comply with the relevant provisions of "Duct Type Air Intake Test Device" in GB/T1236, and the use of "conical inlet collector" is recommended. Approved by the National Machinery Industry Bureau on September 17, 1999
Implemented on 2000-01-01
JB/T6723.4—1999
Jingguang
shop||tt ||1 - atmospheric pressure gauge: 2 - overflow meter; 3 - conical inlet collector; 4 - micro pressure gauge: 5 - throttling metal mesh; 6 - porous rectifier: 7 - test pipeline: 8 — Transition joint; 9 — Fan to be inspected 10 — Speed ??measuring device; 11 — Balanced motor diagram! Simplified diagram of fan performance test device
4.1.2 The basic outer diameter D of the impeller of the fan under test and the diameter d of the wind blade should comply with the requirements in Table 1. Table 1. Selection of air cylinder diameter
impeller basic outer diameter D,
air cylinder diameter d
The test should be conducted indoors.
4.1.3
4.1.4 The height of the fan axis from the ground should not be less than 1m. ≤160
150
>160
180
4.1.51
Within 1.5m in front and rear of the test device, and within 1.2m on both sides There should be no walls or major obstacles. The test is carried out according to the "air intake method" specified in GB/T1236. 4.1.6
The test speed should include at least the following four types
4.1.7
1.1nn, 0.75n.0.5no
Note: Eight is the fan calibration speed. | |tt | Roughly evenly distributed.
The generator should be in no-load condition.
4.1.9
4.2 Test content and data calculation
According to the specified working conditions, measure in sequence;
a) Atmospheric pressure p., Pa;||tt ||b) Atmospheric temperature T., K;
c) Fan speed ne: r/min:
d) Static pressure Ap, and pe. of the inlet collector and test pipeline, Pa; e) Balance motor speed n, r/min;
f) Balance torque M of balance motor, N·m. JB/T6723.4—1999
Note: The balance torque can also be expressed by measuring the length L of the balance motor's moment arm and the balance weight (G-△G) and taking the product, that is, ML (G-4G) Based on the above data, according to the provisions of Table 9 in GB/T1236-1985, calculate the following basic parameters of the wind lift, and draw the fan performance curve in the format of Appendix A (prompt appendix): a) Air volume 9, m/h;|| tt||b) Static pressure Pa, Pa;
c) Shaft power N, kW;
d) Static pressure efficiency na%.
If the environmental conditions during the test deviate from 298K and 10'Pa, the fan performance should be converted to the above specified working conditions according to the provisions of Table 10 in GB/T1236-1985.
5 Fan noise
5.1 Test requirements and methods
5.1.1 The device shown in Figure 1 is used for the test. 5.1.2 The test is conducted indoors and the influence of reflected sound should be avoided. During the test, the A sound level difference at 1m and 2m away from the sound source point should not be less than 5dB(A).
5.1.3 The influence of background noise (environmental noise when the fan is not rotating) should be avoided. The background noise should be at least 10dB(A) lower than the fan under test. If it cannot be reached, when the difference between the two is 3~9dB(A), it should be corrected according to Table 2. When the difference is less than 3dB(A), the measurement should be stopped. Table 2 Sound correction value
Correction value for the difference between the sound pressure level of the measuring point and the background noise sound pressure level
3
3
5.1.4 When installing, the wind The height of the room axis should not be less than 1m. 4. 5
-2
6,7,8.9
-
dB(A)
5.1.5 measuring point is located in front of the fan drive end , ±45° with the wind axis, and on the same horizontal plane, 1m away from the center of the driving wheel. 5.1.6 During the test, the wind speed and air volume shall be as specified in Table 1 of JB/T6723.3-1999. 5.2 Test content and data calculation
According to the specified working conditions, measure the average value of the following sound pressure levels within 10 seconds: a) The total noise (sound pressure level) of the tested fan and drive system, dB (A); b)) Background noise, dB(A).
Note: If the change in the indicated value exceeds 4dB(A), the test results will be invalid. Based on the above data, perform the following processing and calculations in sequence: a) Correct the original reading according to the calibration curve of the instrument; b) Correct the background noise according to the provisions of 5.1.3; c) Calculate the average of the measurement surface according to Equation (1) Sound pressure level LL, Ln+Lp
2
where: L,—The average sound pressure level of the measurement surface, dB(A); —The sound pressure level at the two measuring points corrected by readings and background noise, respectively, in dB(A). LeLea
10
1
Electrical properties
According to the following procedures and methods.
JB/T6723.4—1999
Note: The sequence of membranes for factory inspection is: cold working performance test, vinegar voltage test. 6.1 Cold operating performance test
6.1.1 Test requirements and methods
6.1.1.1 The test should be conducted under the environmental conditions of 15~35℃. 6.1.1.2 The non-inductive resistor used as the rated load should be made of copper-nickel alloy (constantan) and have a resistance value under rated working conditions. 6.1.1.3 The voltage fluctuation within 1 minute during reading should be less than ±0.2V. 6.1.2 Test content and data calculation
According to the specified working conditions: Measure in sequence:
a) Terminal voltage U, V under calibrated speed and rated load; b) Calibrated speed and rated load The output current is 1, A; c) The terminal voltage Umin, V at the lowest operating speed and rated load: d) The terminal voltage U., V at the highest operating speed and rated load. Note: The minimum 1. operating speed is 50% of the calibrated speed; the maximum operating speed is 110% of the calibrated speed. Based on the above data, calculate the corresponding rated output power P. according to equation (2): P-,u,
rated output power of the generator, W.
In the formula: P
6.2 Overspeed test
6.2.1 Test requirements and methods
The fan generator operates without load for 2 minutes at 1.2 times the calibrated speed. 6.2.2 Test content
Observe the damage and tightening conditions of the label components, and retest the cold working performance. 6.3 Vibration test
6.3.1 Test requirements and methods
The fan generator shall vibrate continuously for 10° times under the operating conditions of frequency 50Hz and peak acceleration 40m/s*. 6.3.2 Test content
Same as 6.2.2.
6.4: Temperature rise test
6.4.1 Test requirements and methods
The fan generator shall run continuously for 3 hours under rated working conditions, and the test shall be completed within 20s after the end of the test. 6.4.2 Test content and data calculation
According to the specified working conditions, measure in sequence:
a) The resistance R, Q of the winding at the beginning of the test; b) The temperature of the cooling medium at the beginning of the test 1 , ℃; c) The temperature of the cooling medium at the end of the test, ℃; d) The resistance of the winding R at the end of the test: α. ·(2)
JB/T6723.4—1999
Based on the above data, calculate the corresponding winding temperature rise 4t according to equation (3): R, -R(235+f,)+ff -t2
Ats
where: 4 winding temperature rise, ℃.
6.5 Withstand voltage test
6.5.1 Test requirements and methods
R
6.5.1.1 Voltage is applied between the charged conductor and the non-charged conductor. 6.5.1.2 The test voltage is 550V, 50Hz, and should be sine wave as much as possible. (3)
6.5.1.3 The initial voltage should not exceed 50% of the test voltage, and then rise evenly to the full voltage. The voltage rise time should be no less than 10s. After the full voltage is maintained for 1 minute, the voltage should be evenly discharged. All. 6.5.2 Test content
Check whether the winding insulation is broken down.
6.6 High temperature test
6.6.1 Test requirements and methods
6.6.1.1 The fan generator is placed in a high temperature box, gradually heated from room temperature to 85°C, and kept warm for 2 hours. 6.6.1.2 It is allowed to be tested after being taken out of the high temperature box, but the test should be completed within 3 minutes after being taken out of the high temperature box. 6.6.2 Testing content
Observe the changes in appearance quality and retest the cold working performance. 6.7 Temperature change test
6.7.1 Test requirements and methods
6.7.1.1 The fan generator is placed in the low temperature and high temperature boxes successively. 6.7.1.2 The temperatures inside the low-temperature box and the high-temperature box are -10°C and +85°C respectively (temperature tolerance ±2°C), and each placement time is 2 hours. 6.7.1.3 The test is conducted for a total of 3 cycles.
6.7.1.4 The transfer time between two boxes should not exceed 3 minutes. 6.7.2 Test content
Same as 6.6.2.
6.8 protection level
According to the regulations of GB/T4942.1.
7 Durability
7.1 Test requirements and methods
7.1.1 The device shown in Figure 1 is used for the test. 7.1.2 The fan operates continuously under calibrated working conditions (the fan generator should also be under rated output power) (interruptions are allowed, but each operation time is not less than 6 hours).
7.1.3 The cumulative operating time is 3000h.
7.2 Test content and data calculation
Measured according to specified working conditions:
a) Appearance and assembly quality of the fan before and after the test (coating, paint layer, label, tight circumference parts and fan axial movement) 12
JB/T6723.4-1999
b) Fan performance under calibration conditions before and after the test: c) The fan generator should also be measured Cold operating performance before and after the test, and calculate the reduction rate AP of the rated output power according to equation (4):
Bz-P×100%
AP
where: △P——Rated output power reduction rate, %; R
P..-The rated output power of the fan generator after the test, W; Psz-——The rated output power of the fan generator after the test, W. 8 Instrumentation and accuracy requirements
8.1 The instruments and meters used for testing should be calibrated to be qualified. 8.2 The air volume and static pressure are measured with a blower and a micromanometer. The accuracy of the micromanometer is not less than ±0.1Pa. 8.3 The accuracy of the rotational speed measuring device should not be lower than level 0.5. 8.4 The accuracy of the power (torque) measuring device should not be lower than level 1.5. 8.5 The noise is measured with a precision sound pressure meter, and its graduation value should not be greater than 0.5dB(A). 8.6 The graduation value of the atmospheric pressure gauge should not be greater than 10Pa. The graduation value of the thermometer should not be greater than 0.5K. 8.7
8.8 The accuracy of the voltmeter should not be lower than level 0.5, and the accuracy of other electrical measuring instruments should not be lower than level 1. Result analysis and documentation
9
Test and calculation results should be analyzed and compiled into documents. The contents of the document include: a) Test name;
b) Source of task:
c) Model and quantity of the fans tested:
d) Unit and sampling method of the fans tested: e ) Test content and methods;
f) Test equipment and diagram and main instruments, instruments and equipment: 8) Test results and data calculation:
h) Analysis and conclusion;
) Testing unit, test location, date; J) Main test personnel and approval records;
k) Fan performance curve and test records.
·(4)
13
A1 typical fan characteristic curve is shown in Figure A1. JB/T 6723.4-1999
Appendix A
(prompted appendix)
Fan characteristic curve
Wind room model: FF1840 JB/T6723.31999 Sample receiving unit ：XXXXXX
Detection unit: XXXX×X
Impeller outer diameter D: 180mm
Calibrated speed: 6500r/min
Calibrated air volume: 1050ml/h||tt ||a=7150r/mir
6500
4875
3250
800
static
original 600
Pa
Pa
14
400
200
-7150
650
4875
3250| |tt||200
400
20
600
Figure A1
26
800
Inspection date :
.1000
Fan characteristic curve
1200
>30%
1400
0.6
0.4|| tt||0.2
1600
Air volume 9m/h
axis
work
thing
N
kw| |tt||4—1999
Note: The order of membrane inspection before leaving the factory is: cold working performance test, vinegar voltage test. 6.1 Cold operating performance test
6.1.1 Test requirements and methods
6.1.1.1 The test should be conducted under the environmental conditions of 15~35℃. 6.1.1.2 The non-inductive resistor used as the rated load should be made of copper-nickel alloy (constantan) and have a resistance value under rated working conditions. 6.1.1.3 The voltage fluctuation within 1 minute during reading should be less than ±0.2V. 6.1.2 Test content and data calculation
According to the specified working conditions: Measure in sequence:
a) Terminal voltage U, V under calibrated speed and rated load; b) Calibrated speed and rated load The output current is 1, A; c) The terminal voltage Umin, V at the lowest operating speed and rated load: d) The terminal voltage U., V at the highest operating speed and rated load. Note: The minimum 1. operating speed is 50% of the calibrated speed; the maximum operating speed is 110% of the calibrated speed. Based on the above data, calculate the corresponding rated output power P. according to equation (2): P-,u,
rated output power of the generator, W.
In the formula: P
6.2 Overspeed test
6.2.1 Test requirements and methods
The fan generator operates without load for 2 minutes at 1.2 times the calibrated speed. 6.2.2 Test content
Observe the damage and tightening conditions of the label components, and retest the cold working performance. 6.3 Vibration test
6.3.1 Test requirements and methods
The fan generator shall vibrate continuously for 10° times under the operating conditions of frequency 50Hz and peak acceleration 40m/s*. 6.3.2 Test content
Same as 6.2.2.
6.4: Temperature rise test
6.4.1 Test requirements and methods
The fan generator shall run continuously for 3 hours under rated working conditions, and the test shall be completed within 20s after the end of the test. 6.4.2 Test content and data calculation
According to the specified working conditions, measure in sequence:
a) The resistance R, Q of the winding at the beginning of the test; b) The temperature of the cooling medium at the beginning of the test 1 , ℃; c) The temperature of the cooling medium at the end of the test, ℃; d) The resistance of the winding R at the end of the test: α. ·(2)
JB/T6723.4—1999
Based on the above data, calculate the corresponding winding temperature rise 4t according to equation (3): R, -R(235+f,)+ff -t2
Ats
where: 4 winding temperature rise, ℃.
6.5 Withstand voltage test
6.5.1 Test requirements and methods
R
6.5.1.1 Voltage is applied between the charged conductor and the non-charged conductor. 6.5.1.2 The test voltage is 550V, 50Hz, and should be sine wave as much as possible. (3)
6.5.1.3 The initial voltage should not exceed 50% of the test voltage, and then rise evenly to the full voltage. The voltage rise time should be no less than 10s. After the full voltage is maintained for 1 minute, the voltage should be evenly discharged. All. 6.5.2 Test content
Check whether the winding insulation is broken down.
6.6 High temperature test
6.6.1 Test requirements and methods
6.6.1.1 The fan generator is placed in a high temperature box, gradually heated from room temperature to 85°C, and kept warm for 2 hours. 6.6.1.2 It is allowed to be tested after being taken out of the high temperature box, but the test should be completed within 3 minutes after being taken out of the high temperature box. 6.6.2 Testing content
Observe the changes in appearance quality and retest the cold working performance. 6.7 Temperature change test
6.7.1 Test requirements and methods
6.7.1.1 The fan generator is placed in the low temperature and high temperature boxes successively. 6.7.1.2 The temperatures inside the low-temperature box and the high-temperature box are -10°C and +85°C respectively (temperature tolerance ±2°C), and each placement time is 2 hours. 6.7.1.3 The test is conducted for a total of 3 cycles.
6.7.1.4 The transfer time between two boxes should not exceed 3 minutes. 6.7.2 Test content
Same as 6.6.2.
6.8 protection level
According to the regulations of GB/T4942.1.
7 Durability
7.1 Test requirements and methods
7.1.1 The device shown in Figure 1 is used for the test. 7.1.2 The fan operates continuously under calibrated working conditions (the fan generator should also be under rated output power) (interruptions are allowed, but each operation time is not less than 6 hours).
7.1.3 The cumulative operating time is 3000h.
7.2 Test content and data calculation
Measured according to specified working conditions:
a) Appearance and assembly quality of the fan before and after the test (coating, paint layer, label, tight circumference parts and fan axial movement) 12
JB/T6723.4-1999
b) Fan performance under calibration conditions before and after the test: c) The fan generator should also be measured Cold operating performance before and after the test, and calculate the reduction rate AP of the rated output power according to equation (4):
Bz-P×100%
AP
where: △P——Rated output power reduction rate, %; R
P..-The rated output power of the fan generator after the test, W; Psz-——The rated output power of the fan generator after the test, W. 8 Instrumentation and accuracy requirements
8.1 The instruments and meters used for testing should be calibrated to be qualified. 8.2 The air volume and static pressure are measured with a blower and a micromanometer. The accuracy of the micromanometer is not less than ±0.1Pa. 8.3 The accuracy of the rotation speed measuring device should not be lower than level 0.5. 8.4 The accuracy of the power (torque) measuring device should not be lower than level 1.5. 8.5 The noise is measured with a precision sound pressure meter, and its graduation value should not be greater than 0.5dB(A). 8.6 The graduation value of the atmospheric pressure gauge should not be greater than 10Pa. The graduation value of the thermometer should not be greater than 0.5K. 8.7
8.8 The accuracy of the voltmeter should not be lower than level 0.5, and the accuracy of other electrical measuring instruments should not be lower than level 1. Result analysis and documentation
9
Test and calculation results should be analyzed and compiled into documents. The contents of the document include: a) Test name;
b) Source of task:
c) Model and quantity of the fans tested:
d) Unit and sampling method of the fans tested: e ) Test content and methods;
f) Test equipment and diagram and main instruments, instruments and equipment: 8) Test results and data calculation:
h) Analysis and conclusion;
) Testing unit, test location, date; J) Main test personnel and approval records;
k) Fan performance curve and test records.
·(4)
13
A1 typical fan characteristic curve is shown in Figure A1. JB/T 6723.4-1999
Appendix A
(prompted appendix)
Fan characteristic curve
Wind room model: FF1840 JB/T6723.31999 Sample receiving unit ：XXXXXX
Detection unit: XXXX×X
Impeller outer diameter D: 180mm
Calibrated speed: 6500r/min
Calibrated air volume: 1050ml/h||tt ||a=7150r/mir
6500
4875
3250
800
static
original 600
Pa
Pa
14
400
200
-7150
650
4875
3250| |tt||200
400
20
600
Figure A1
26
800
Inspection date :
.1000
Fan characteristic curve
1200
>30%
1400
0.6
0.4|| tt||0.2
1600
Air volume 9m/h
axis
work
thing
N
kw| |tt||4—1999
Note: The order of membrane inspection before leaving the factory is: cold working performance test, vinegar voltage test. 6.1 Cold operating performance test
6.1.1 Test requirements and methods
6.1.1.1 The test should be conducted under the environmental conditions of 15~35℃. 6.1.1.2 The non-inductive resistor used as the rated load should be made of copper-nickel alloy (constantan) and have a resistance value under rated working conditions. 6.1.1.3 The voltage fluctuation within 1 minute during reading should be less than ±0.2V. 6.1.2 Test content and data calculation
According to the specified working conditions: Measure in sequence:
a) Terminal voltage U, V under calibrated speed and rated load; b) Calibrated speed and rated load The output current is 1, A; c) The terminal voltage Umin, V at the lowest operating speed and rated load: d) The terminal voltage U., V at the highest operating speed and rated load. Note: The minimum 1. operating speed is 50% of the calibrated speed; the maximum operating speed is 110% of the calibrated speed. Based on the above data, calculate the corresponding rated output power P. according to equation (2): P-,u,
rated output power of the generator, W.
In the formula: P
6.2 Overspeed test
6.2.1 Test requirements and methods
The fan generator operates without load for 2 minutes at 1.2 times the calibrated speed. 6.2.2 Test content
Observe the damage and tightening conditions of the label components, and retest the cold working performance. 6.3 Vibration test
6.3.1 Test requirements and methods
The fan generator shall vibrate continuously for 10° times under the operating conditions of frequency 50Hz and peak acceleration 40m/s*. 6.3.2 Test content
Same as 6.2.2.
6.4: Temperature rise test
6.4.1 Test requirements and methods
The fan generator shall run continuously for 3 hours under rated working conditions, and the test shall be completed within 20s after the end of the test. 6.4.2 Test content and data calculation
According to the specified working conditions, measure in sequence:
a) The resistance R, Q of the winding at the beginning of the test; b) The temperature of the cooling medium at the beginning of the test 1 , ℃; c) The temperature of the cooling medium at the end of the test, ℃; d) The resistance of the winding R at the end of the test: α. ·(2)
JB/T6723.4—1999
Based on the above data, calculate the corresponding winding temperature rise 4t according to equation (3): R, -R(235+f,)+ff -t2
Ats
where: 4 winding temperature rise, ℃.
6.5 Withstand voltage test
6.5.1 Test requirements and methods
R
6.5.1.1 Voltage is applied between the charged conductor and the non-charged conductor. 6.5.1.2 The test voltage is 550V, 50Hz, and should be sine wave as much as possible. (3)
6.5.1.3 The initial voltage should not exceed 50% of the test voltage, and then rise evenly to the full voltage. The voltage rise time should be no less than 10s. After the full voltage is maintained for 1 minute, the voltage should be evenly discharged. All. 6.5.2 Test content
Check whether the winding insulation is broken down.
6.6 High temperature test
6.6.1 Test requirements and methods
6.6.1.1 The fan generator is placed in a high temperature box, gradually heated from room temperature to 85°C, and kept warm for 2 hours. 6.6.1.2 It is allowed to be tested after being taken out of the high temperature box, but the test should be completed within 3 minutes after being taken out of the high temperature box. 6.6.2 Testing content
Observe the changes in appearance quality and retest the cold working performance. 6.7 Temperature change test
6.7.1 Test requirements and methods
6.7.1.1 The fan generator is placed in the low temperature and high temperature boxes successively. 6.7.1.2 The temperatures inside the low-temperature box and the high-temperature box are -10°C and +85°C respectively (temperature tolerance ±2°C), and each placement time is 2 hours. 6.7.1.3 The test is conducted for a total of 3 cycles.
6.7.1.4 The transfer time between two boxes should not exceed 3 minutes. 6.7.2 Test content
Same as 6.6.2.
6.8 protection level
According to the regulations of GB/T4942.1.
7 Durability
7.1 Test requirements and methods
7.1.1 The device shown in Figure 1 is used for the test. 7.1.2 The fan operates continuously under calibrated working conditions (the fan generator should also be under rated output power) (interruptions are allowed, but each operation time is not less than 6 hours).
7.1.3 The cumulative operating time is 3000h.
7.2 Test content and data calculation
Measured according to specified working conditions:
a) Appearance and assembly quality of the fan before and after the test (coating, paint layer, label, tight circumference parts and fan axial movement) 12
JB/T6723.4-1999
b) Fan performance under calibration conditions before and after the test: c) The fan generator should also be measured Cold operating performance before and after the test, and calculate the reduction rate AP of the rated output power according to equation (4):
Bz-P×100%
AP
where: △P——Rated output power reduction rate, %; R
P..-The rated output power of the fan generator after the test, W; Psz-——The rated output power of the fan generator after the test, W. 8 Instrumentation and accuracy requirements
8.1 The instruments and meters used for testing should be calibrated to be qualified. 8.2 The air volume and static pressure are measured with a blower and a micromanometer. The accuracy of the micromanometer is not less than ±0.1Pa. 8.3 The accuracy of the rotation speed measuring device should not be lower than level 0.5. 8.4 The accuracy of the power (torque) measuring device should not be lower than level 1.5. 8.5 The noise is measured with a precision sound pressure meter, and its graduation value should not be greater than 0.5dB(A). 8.6 The graduation value of the atmospheric pressure gauge should not be greater than 10Pa. The graduation value of the thermometer should not be greater than 0.5K. 8.7
8.8 The accuracy of the voltmeter should not be lower than level 0.5, and the accuracy of other electrical measuring instruments should not be lower than level 1. Result analysis and documentation
9
Test and calculation results should be analyzed and compiled into documents. The contents of the document include: a) Test name;
b) Source of task:
c) Model and quantity of the fans tested:
d) Unit and sampling method of the fans tested: e ) Test content and methods;
f) Test equipment and diagram and main instruments, instruments and equipment: 8) Test results and data calculation:
h) Analysis and conclusion;
) Testing unit, test location, date; J) Main test personnel and approval records;
k) Fan performance curve and test records.
·(4)
13
A1 typical fan characteristic curve is shown in Figure A1. JB/T 6723.4-1999
Appendix A
(prompted appendix)
Fan characteristic curve
Wind room model: FF1840 JB/T6723.31999 Sample receiving unit ：XXXXXX
Detection unit: XXXX×X
Impeller outer diameter D: 180mm
Calibrated speed: 6500r/min
Calibrated air volume: 1050ml/h||tt ||a=7150r/mir
6500
4875
3250
800
static
original 600
Pa
Pa
14
400
200
-7150
650
4875
3250| |tt||200
400
20
600
Figure A1
26
800
Inspection date :
.1000
Fan characteristic curve
1200
>30%
1400
0.6
0.4|| tt||0.2
1600
Air volume 9m/h
axis
work
thing
N
kw| |tt||2. The non-inductive resistor used as the rated load should be made of copper-nickel alloy (constantan) and have a resistance value under rated working conditions. 6.1.1.3 The voltage fluctuation within 1 minute during reading should be less than ±0.2V. 6.1.2 Test content and data calculation
According to the specified working conditions: Measure in sequence:
a) Terminal voltage U, V under calibrated speed and rated load; b) Calibrated speed and rated load The output current is 1, A; c) The terminal voltage Umin, V at the lowest operating speed and rated load: d) The terminal voltage U., V at the highest operating speed and rated load. Note: The minimum 1. operating speed is 50% of the calibrated speed; the maximum operating speed is 110% of the calibrated speed. Based on the above data, calculate the corresponding rated output power P. according to equation (2): P-,u,
rated output power of the generator, W.
In the formula: P
6.2 Overspeed test
6.2.1 Test requirements and methods
The fan generator operates without load for 2 minutes at 1.2 times the calibrated speed. 6.2.2 Test content
Observe the damage and tightening conditions of the label components, and retest the cold working performance. 6.3 Vibration test
6.3.1 Test requirements and methods
The fan generator shall vibrate continuously for 10° times under the operating conditions of frequency 50Hz and peak acceleration 40m/s*. 6.3.2 Test content
Same as 6.2.2.
6.4: Temperature rise test
6.4.1 Test requirements and methods
The fan generator shall run continuously for 3 hours under rated working conditions, and the test shall be completed within 20s after the end of the test. 6.4.2 Test content and data calculation
According to the specified working conditions, measure in sequence:
a) The resistance R, Q of the winding at the beginning of the test; b) The temperature of the cooling medium at the beginning of the test 1 , ℃; c) The temperature of the cooling medium at the end of the test, ℃; d) The resistance of the winding R at the end of the test: α. ·(2)
JB/T6723.4—1999
Based on the above data, calculate the corresponding winding temperature rise 4t according to equation (3): R, -R(235+f,)+ff -t2
Ats
where: 4 winding temperature rise, ℃.
6.5 Withstand voltage test
6.5.1 Test requirements and methods
R
6.5.1.1 Voltage is applied between the charged conductor and the non-charged conductor. 6.5.1.2 The test voltage is 550V, 50Hz, and should be sine wave as much as possible. (3)
6.5.1.3 The initial voltage should not exceed 50% of the test voltage, and then rise evenly to the full voltage. The voltage rise time should be no less than 10s. After the full voltage is maintained for 1 minute, the voltage should be evenly discharged. All. 6.5.2 Test content
Check whether the winding insulation is broken down.
6.6 High temperature test
6.6.1 Test requirements and methods
6.6.1.1 The fan generator is placed in a high temperature box, gradually heated from room temperature to 85°C, and kept warm for 2 hours. 6.6.1.2 It is allowed to be tested after being taken out of the high temperature box, but the test should be completed within 3 minutes after being taken out of the high temperature box. 6.6.2 Testing content
Observe the changes in appearance quality and retest the cold working performance. 6.7 Temperature change test
6.7.1 Test requirements and methods
6.7.1.1 The fan generator is placed in the low temperature and high temperature boxes successively. 6.7.1.2 The temperatures inside the low-temperature box and the high-temperature box are -10°C and +85°C respectively (temperature tolerance ±2°C), and each placement time is 2 hours. 6.7.1.3 The test is conducted for a total of 3 cycles.
6.7.1.4 The transfer time between two boxes should not exceed 3 minutes. 6.7.2 Test content
Same as 6.6.2.
6.8 protection level
According to the regulations of GB/T4942.1.
7 Durability
7.1 Test requirements and methods
7.1.1 The device shown in Figure 1 is used for the test. 7.1.2 The fan operates continuously under calibrated working conditions (the fan generator should also be under rated output power) (interruptions are allowed, but each operation time is not less than 6 hours).
7.1.3 The cumulative operating time is 3000h.
7.2 Test content and data calculation
Measured according to specified working conditions:
a) Appearance and assembly quality of the fan before and after the test (coating, paint layer, label, tight circumference parts and fan axial movement) 12
JB/T6723.4-1999
b) Fan performance under calibration conditions before and after the test: c) The fan generator should also be measured Cold operating performance before and after the test, and calculate the reduction rate AP of the rated output power according to equation (4):
Bz-P×100%
AP
where: △P——Rated output power reduction rate, %; R
P..-The rated output power of the fan generator after the test, W; Psz-——The rated output power of the fan generator after the test, W. 8 Instrumentation and accuracy requirements
8.1 The instruments and meters used for testing should be calibrated to be qualified. 8.2 The air volume and static pressure are measured with a blower and a micromanometer. The accuracy of the micromanometer is not less than ±0.1Pa. 8.3 The accuracy of the rotation speed measuring device should not be lower than level 0.5. 8.4 The accuracy of the power (torque) measuring device should not be lower than level 1.5. 8.5 The noise is measured with a precision sound pressure meter, and its graduation value should not be greater than 0.5dB(A). 8.6 The graduation value of the atmospheric pressure gauge should not be greater than 10Pa. The graduation value of the thermometer should not be greater than 0.5K. 8.7
8.8 The accuracy of the voltmeter should not be lower than level 0.5, and the accuracy of other electrical measuring instruments should not be lower than level 1. Result analysis and documentation
9
Test and calculation results should be analyzed and compiled into documents. The contents of the document include: a) Test name;
b) Source of task:
c) Model and quantity of the fans tested:
d) Unit and sampling method of the fans tested: e ) Test content and methods;
f) Test equipment and diagram and main instruments, instruments and equipment: 8) Test results and data calculation:
h) Analysis and conclusion;
) Testing unit, test location, date; J) Main test personnel and approval records;
k) Fan performance curve and test records.
·(4)
13
A1 typical fan characteristic curve is shown in Figure A1. JB/T 6723.4-1999
Appendix A
(prompted appendix)
Fan characteristic curve
Wind room model: FF1840 JB/T6723.31999 Sample receiving unit ：XXXXXX
Detection unit: XXXX×X
Impeller outer diameter D: 180mm
Calibrated speed: 6500r/min
Calibrated air volume: 1050ml/h||tt ||a=7150r/mirbZxz.net
6500
4875
3250
800
static
original 600
Pa
Pa
14
400
200
-7150
650
4875
3250| |tt||200
400
20
600
Figure A1
26
800
Inspection date :
.1000
Fan characteristic curve
1200
>30%
1400
0.6
0.4|| tt||0.2
1600
Air volume 9m/h
axis
work
thing
N
kw| |tt||2. The non-inductive resistor used as the rated load should be made of copper-nickel alloy (constantan) and have a resistance value under rated working conditions. 6.1.1.3 The voltage fluctuation within 1 minute during reading should be less than ±0.2V. 6.1.2 Test content and data calculation
According to the specified working conditions: Measure in sequence:
a) Terminal voltage U, V under calibrated speed and rated load; b) Calibrated speed and rated load The output current is 1, A; c) The terminal voltage Umin, V at the lowest operating speed and rated load: d) The terminal voltage U., V at the highest operating speed and rated load. Note: The minimum 1. operating speed is 50% of the calibrated speed; the maximum operating speed is 110% of the calibrated speed. Based on the above data, calculate the corresponding rated output power P. according to equation (2): P-,u,
rated output power of the generator, W.
In the formula: P
6.2 Overspeed test
6.2.1 Test requirements and methods
The fan generator operates without load for 2 minutes at 1.2 times the calibrated speed. 6.2.2 Test content
Observe the damage and tightening conditions of the label components, and retest the cold working performance. 6.3 Vibration test
6.3.1 Test requirements and methods
The fan generator shall vibrate continuously for 10° times under the operating conditions of frequency 50Hz and peak acceleration 40m/s*. 6.3.2 Test content
Same as 6.2.2.
6.4: Temperature rise test
6.4.1 Test requirements and methods
The fan generator shall run continuously for 3 hours under rated working conditions, and the test shall be completed within 20s after the end of the test. 6.4.2 Test content and data calculation
According to the specified working conditions, measure in sequence:
a) The resistance R, Q of the winding at the beginning of the test; b) The temperature of the cooling medium at the beginning of the test 1 , ℃; c) The temperature of the cooling medium at the end of the test, ℃; d) The resistance of the winding R at the end of the test: α. ·(2)
JB/T6723.4—1999
Based on the above data, calculate the corresponding winding temperature rise 4t according to equation (3): R, -R(235+f,)+ff -t2
Ats
where: 4 winding temperature rise, ℃.
6.5 Withstand voltage test
6.5.1 Test requirements and methods
R
6.5.1.1 Voltage is applied between the charged conductor and the non-charged conductor. 6.5.1.2 The test voltage is 550V, 50Hz, and should be sine wave as much as possible. (3)
6.5.1.3 The initial voltage should not exceed 50% of the test voltage, and then rise evenly to the full voltage. The voltage rise time should be no less than 10s. After the full voltage is maintained for 1 minute, the voltage should be evenly discharged. All. 6.5.2 Test content
Check whether the winding insulation is broken down.
6.6 High temperature test
6.6.1 Test requirements and methods
6.6.1.1 The fan generator is placed in a high temperature box, gradually heated from room temperature to 85°C, and kept warm for 2 hours. 6.6.1.2 It is allowed to be tested after being taken out of the high temperature box, but the test should be completed within 3 minutes after being taken out of the high temperature box. 6.6.2 Testing content
Observe the changes in appearance quality and retest the cold working performance. 6.7 Temperature change test
6.7.1 Test requirements and methods
6.7.1.1 The fan generator is placed in the low temperature and high temperature boxes successively. 6.7.1.2 The temperatures inside the low-temperature box and the high-temperature box are -10°C and +85°C respectively (temperature tolerance ±2°C), and each placement time is 2 hours. 6.7.1.3 The test is conducted for a total of 3 cycles.
6.7.1.4 The transfer time between two boxes should not exceed 3 minutes. 6.7.2 Test content
Same as 6.6.2.
6.8 protection level
According to the regulations of GB/T4942.1.
7 Durability
7.1 Test requirements and methods
7.1.1 The device shown in Figure 1 is used for the test. 7.1.2 The fan operates continuously under calibrated working conditions (the fan generator should also be under rated output power) (interruptions are allowed, but each operation time is not less than 6 hours).
7.1.3 The cumulative operating time is 3000h.
7.2 Test content and data calculation
Measured according to specified working conditions:
a) Appearance and assembly quality of the fan before and after the test (coating, paint layer, label, tight circumference parts and fan axial movement) 12
JB/T6723.4-1999
b) Fan performance under calibration conditions before and after the test: c) The fan generator should also be measured Cold operating performance before and after the test, and calculate the reduction rate AP of the rated output power according to equation (4):
Bz-P×100%
AP
where: △P——Rated output power reduction rate, %; R
P..-The rated output power of the fan generator after the test, W; Psz-——The rated output power of the fan generator after the test, W. 8 Instrumentation and accuracy requirements
8.1 The instruments and meters used for testing should be calibrated to be qualified. 8.2 The air volume and static pressure are measured with a blower and a micromanometer. The accuracy of the micromanometer is not less than ±0.1Pa. 8.3 The accuracy of the rotation speed measuring device should not be lower than level 0.5. 8.4 The accuracy of the power (torque) measuring device should not be lower than level 1.5. 8.5 The noise is measured with a precision sound pressure meter, and its graduation value should not be greater than 0.5dB(A). 8.6 The graduation value of the atmospheric pressure gauge should not be greater than 10Pa. The graduation value of the thermometer should not be greater than 0.5K. 8.7
8.8 The accuracy of the voltmeter should not be lower than level 0.5, and the accuracy of other electrical measuring instruments should not be lower than level 1. Result analysis and documentation
9
Test and calculation results should be analyzed and compiled into documents. The contents of the document include: a) Test name;
b) Source of task:
c) Model and quantity of the fans tested:
d) Unit and sampling method of the fans tested: e ) Test content and methods;
f) Test equipment and diagram and main instruments, instruments and equipment: 8) Test results and data calculation:
h) Analysis and conclusion;
) Testing unit, test location, date; J) Main test personnel and approval records;
k) Fan performance curve and test records.
·(4)
13
A1 typical fan characteristic curve is shown in Figure A1. JB/T 6723.4-1999
Appendix A
(prompted appendix)
Fan characteristic curve
Wind room model: FF1840 JB/T6723.31999 Sample receiving unit ：XXXXXX
Detection unit: XXXX×X
Impeller outer diameter D: 180mm
Calibrated speed: 6500r/min
Calibrated air volume: 1050ml/h||tt ||a=7150r/mir
6500
4875
3250
800
static
original 600
Pa
Pa
14
400
200
-7150
650
4875
3250| |tt||200
400
20
600
Figure A1
26
800
Inspection date :
.1000
Fan characteristic curve
1200
>30%
1400
0.6
0.4|| tt||0.2
1600
Air volume 9m/h
axis
work
thing
N
kw| |tt||：P-,u,
Rated output power of generator, W.
In the formula: P
6.2 Overspeed test
6.2.1 Test requirements and methods
The fan generator operates without load for 2 minutes at 1.2 times the calibrated speed. 6.2.2 Test content
Observe the damage and tightening conditions of the label components, and retest the cold working performance. 6.3 Vibration test
6.3.1 Test requirements and methods
The fan generator shall vibrate continuously for 10° times under the operating conditions of frequency 50Hz and peak acceleration 40m/s*. 6.3.2 Test content
Same as 6.2.2.
6.4: Temperature rise test
6.4.1 Test requirements and methods
The fan generator shall run continuously for 3 hours under rated working conditions, and the test shall be completed within 20s after the end of the test. 6.4.2 Test content and data calculation
According to the specified working conditions, measure in sequence:
a) The resistance R, Q of the winding at the beginning of the test; b) The temperature of the cooling medium at the beginning of the test 1 , ℃; c) The temperature of the cooling medium at the end of the test, ℃; d) The resistance of the winding R at the end of the test: α. ·(2)
JB/T6723.4—1999
Based on the above data, calculate the corresponding winding temperature rise 4t according to equation (3): R, -R(235+f,)+ff -t2
Ats
where: 4 winding temperature rise, ℃.
6.5 Withstand voltage test
6.5.1 Test requirements and methods
R
6.5.1.1 Voltage is applied between the charged conductor and the non-charged conductor. 6.5.1.2 The test voltage is 550V, 50Hz, and should be sine wave as much as possible. (3)
6.5.1.3 The initial voltage should not exceed 50% of the test voltage, and then rise evenly to the full voltage. The voltage rise time should be no less than 10s. After the full voltage is maintained for 1 minute, the voltage should be evenly discharged. All. 6.5.2 Test content
Check whether the winding insulation is broken down.
6.6 High temperature test
6.6.1 Test requirements and methods
6.6.1.1 The fan generator is placed in a high temperature box, gradually heated from room temperature to 85°C, and kept warm for 2 hours. 6.6.1.2 It is allowed to be tested after being taken out of the high temperature box, but the test should be completed within 3 minutes after being taken out of the high temperature box. 6.6.2 Testing content
Observe the changes in appearance quality and retest the cold working performance. 6.7 Temperature change test
6.7.1 Test requirements and methods
6.7.1.1 The fan generator is placed in the low temperature and high temperature boxes successively. 6.7.1.2 The temperatures inside the low-temperature box and the high-temperature box are -10°C and +85°C respectively (temperature tolerance ±2°C), and each placement time is 2 hours. 6.7.1.3 The test is conducted for a total of 3 cycles.
6.7.1.4 The transfer time between two boxes should not exceed 3 minutes. 6.7.2 Test content
Same as 6.6.2.
6.8 protection level
According to the regulations of GB/T4942.1.
7 Durability
7.1 Test requirements and methods
7.1.1 The device shown in Figure 1 is used for the test. 7.1.2 The fan operates continuously under calibrated working conditions (the fan generator should also be under rated output power) (interruptions are allowed, but each operation time is not less than 6 hours).
7.1.3 The cumulative operating time is 3000h.
7.2 Test content and data calculation
Measured according to specified working conditions:
a) Appearance and assembly quality of the fan before and after the test (coating, paint layer, label, tight circumference parts and fan axial movement) 12
JB/T6723.4-1999
b) Fan performance under calibration conditions before and after the test: c) The fan generator should also be measured Cold operating performance before and after the test, and calculate the reduction rate AP of the rated output power according to equation (4):
Bz-P×100%
AP
where: △P——Rated output power reduction rate, %; R
P..-The rated output power of the fan generator after the test, W; Psz-——The rated output power of the fan generator after the test, W. 8 Instrumentation and accuracy requirements
8.1 The instruments and meters used for testing should be calibrated to be qualified. 8.2 The air volume and static pressure are measured with a blower and a micromanometer. The accuracy of the micromanometer is not less than ±0.1Pa. 8.3 The accuracy of the rotation speed measuring device should not be lower than level 0.5. 8.4 The accuracy of the power (torque) measuring device should not be lower than level 1.5. 8.5 The noise is measured with a precision sound pressure meter, and its graduation value should not be greater than 0.5dB(A). 8.6 The graduation value of the atmospheric pressure gauge should not be greater than 10Pa. The graduation value of the thermometer should not be greater than 0.5K. 8.7
8.8 The accuracy of the voltmeter should not be lower than level 0.5, and the accuracy of other electrical measuring instruments should not be lower than level 1. Result analysis and documentation
9
Test and calculation results should be analyzed and compiled into documents. The contents of the document include: a) Test name;
b) Source of task:
c) Model and quantity of the fans tested:
d) Unit and sampling method of the fans tested: e ) Test content and methods;
f) Test equipment and diagram and main instruments, instruments and equipment: 8) Test results and data calculation:
h) Analysis and conclusion;
) Testing unit, test location, date; J) Main test personnel and approval records;
k) Fan performance curve and test records.
·(4)
13
A1 typical fan characteristic curve is shown in Figure A1. JB/T 6723.4-1999
Appendix A
(prompted appendix)
Fan characteristic curve
Wind room model: FF1840 JB/T6723.31999 Sample receiving unit ：XXXXXX
Detection unit: XXXX×X
Impeller outer diameter D: 180mm
Calibrated speed: 6500r/min
Calibrated air volume: 1050ml/h||tt ||a=7150r/mir
6500
4875
3250
800
static
original 600
Pa
Pa
14
400
200
-7150
650
4875
3250| |tt||200
400
20
600
Figure A1
26
800
Inspection date :
.1000
Fan characteristic curve
1200
>30%
1400
0.6
0.4|| tt||0.2
1600
Air volume 9m/h
axis
work
thing
N
kw| |tt||：P-,u,
Rated output power of generator, W.
In the formula: P
6.2 Overspeed test
6.2.1 Test requirements and methods
The fan generator operates without load for 2 minutes at 1.2 times the calibrated speed. 6.2.2 Test content
Observe the damage and tightening conditions of the label components, and retest the cold working performance. 6.3 Vibration test
6.3.1 Test requirements and methods
The fan generator shall vibrate continuously for 10° times under the operating conditions of frequency 50Hz and peak acceleration 40m/s*. 6.3.2 Test content
Same as 6.2.2.
6.4: Temperature rise test
6.4.1 Test requirements and methods
The fan generator shall run continuously for 3 hours under rated working conditions, and the test shall be completed within 20s after the end of the test. 6.4.2 Test content and data calculation
According to the specified working conditions, measure in sequence:
a) The resistance R, Q of the winding at the beginning of the test; b) The temperature of the cooling medium at the beginning of the test 1 , ℃; c) The temperature of the cooling medium at the end of the test, ℃; d) The resistance of the winding R at the end of the test: α. ·(2)
JB/T6723.4—1999
Based on the above data, calculate the corresponding winding temperature rise 4t according to equation (3): R, -R(235+f,)+ff -t2
Ats
where: 4 winding temperature rise, ℃.
6.5 Withstand voltage test
6.5.1 Test requirements and methods
R
6.5.1.1 Voltage is applied between the charged conductor and the non-charged conductor. 6.5.1.2 The test voltage is 550V, 50Hz, and should be sine wave as much as possible. (3)
6.5.1.3 The initial voltage should not exceed 50% of the test voltage, and then rise evenly to the full voltage. The voltage rise time should be no less than 10s. After the full voltage is maintained for 1 minute, the voltage should be evenly discharged. All. 6.5.2 Test content
Check whether the winding insulation is broken down.
6.6 High temperature test
6.6.1 Test requirements and methods
6.6.1.1 The fan generator is placed in a high temperature box, gradually heated from room temperature to 85°C, and kept warm for 2 hours. 6.6.1.2 It is allowed to be tested after being taken out of the high temperature box, but the test should be completed within 3 minutes after being taken out of the high temperature box. 6.6.2 Testing content
Observe the changes in appearance quality and retest the cold working performance. 6.7 Temperature change test
6.7.1 Test requirements and methods
6.7.1.1 The fan generator is placed in the low temperature and high temperature boxes successively. 6.7.1.2 The temperatures inside the low-temperature box and the high-temperature box are -10°C and +85°C respectively (temperature tolerance ±2°C), and each placement time is 2 hours. 6.7.1.3 The test is conducted for a total of 3 cycles.
6.7.1.4 The transfer time between two boxes should not exceed 3 minutes. 6.7.2 Test content
Same as 6.6.2.
6.8 protection level
According to the regulations of GB/T4942.1.
7 Durability
7.1 Test requirements and methods
7.1.1 The device shown in Figure 1 is used for the test. 7.1.2 The fan operates continuously under calibrated working conditions (the fan generator should also be under rated output power) (interruptions are allowed, but each operation time is not less than 6 hours).
7.1.3 The cumulative operating time is 3000h.
7.2 Test content and data calculation
Measured according to specified working conditions:
a) Appearance and assembly quality of the fan before and after the test (coating, paint layer, label, tight circumference parts and fan axial movement) 12
JB/T6723.4-1999
b) Fan performance under calibration conditions before and after the test: c) The fan generator should also be measured Cold operating performance before and after the test, and calculate the reduction rate AP of the rated output power according to equation (4):
Bz-P×100%
AP
where: △P——Rated output power reduction rate, %; R
P..-The rated output power of the fan generator after the test, W; Psz-——The rated output power of the fan generator after the test, W. 8 Instrumentation and accuracy requirements
8.1 The instruments and meters used for testing should be calibrated to be qualified. 8.2 The air volume and static pressure are measured with a blower and a micromanometer. The accuracy of the micromanometer is not less than ±0.1Pa. 8.3 The accuracy of the rotational speed measuring device should not be lower than level 0.5. 8.4 The accuracy of the power (torque) measuring device should not be lower than level 1.5. 8.5 The noise is measured with a precision sound pressure meter, and its graduation value should not be greater than 0.5dB(A). 8.6 The graduation value of the atmospheric pressure gauge should not be greater than 10Pa. The graduation value of the thermometer should not be greater than 0.5K. 8.7
8.8 The accuracy of the voltmeter should not be lower than level 0.5, and the accuracy of other electrical measuring instruments should not be lower than level 1. Result analysis and documentation
9
Test and calculation results should be analyzed and compiled into documents. The contents of the document include: a) Test name;
b) Source of task:
c) Model and quantity of the fans tested:
d) Unit and sampling method of the fans tested: e ) Test content and methods;
f) Test equipment and diagram and main instruments, instruments and equipment: 8) Test results and data calculation:
h) Analysis and conclusion;
) Testing unit, test location, date; J) Main test personnel and approval records;
k) Fan performance curve and test records.
·(4)
13
A1 typical fan characteristic curve is shown in Figure A1. JB/T 6723.4-1999
Appendix A
(prompted appendix)
Fan characteristic curve
Wind room model: FF1840 JB/T6723.31999 Sample receiving unit ：XXXXXX
Detection unit: XXXX×X
Impeller outer diameter D: 180mm
Calibrated speed: 6500r/min
Calibrated air volume: 1050ml/h||tt ||a=7150r/mir
6500
4875
3250
800
static
original 600
Pa
Pa
14
400
200
-7150
650
4875
3250| |tt||200
400
20
600
Figure A1
26
800
Inspection date :
.1000
Fan characteristic curve
1200
>30%
1400
0.6
0.4|| tt||0.2
1600
Air volume 9m/h
axis
work
thing
N
kw| |tt||)+ff -t2
Ats
where: 4 winding temperature rise, ℃.
6.5 Withstand voltage test
6.5.1 Test requirements and methods
R
6.5.1.1 Voltage is applied between the charged conductor and the non-charged conductor. 6.5.1.2 The test voltage is 550V, 50Hz, and should be sine wave as much as possible. (3)
6.5.1.3 The initial voltage should not exceed 50% of the test voltage, and then rise evenly to the full voltage. The voltage rise time should be no less than 10s. After the full voltage is maintained for 1 minute, the voltage should be evenly discharged. All. 6.5.2 Test content
Check whether the winding insulation is broken down.
6.6 High temperature test
6.6.1 Test requirements and methods
6.6.1.1 The fan generator is placed in a high temperature box, gradually heated from room temperature to 85°C, and kept warm for 2 hours. 6.6.1.2 It is allowed to be tested after being taken out of the high temperature box, but the test should be completed within 3 minutes after being taken out of the high temperature box. 6.6.2 Testing content
Observe the changes in appearance quality and retest the cold working performance. 6.7 Temperature change test
6.7.1 Test requirements and methods
6.7.1.1 The fan generator is placed in the low temperature and high temperature boxes successively. 6.7.1.2 The temperatures inside the low-temperature box and the high-temperature box are -10°C and +85°C respectively (temperature tolerance ±2°C), and each placement time is 2 hours. 6.7.1.3 The test is conducted for a total of 3 cycles.
6.7.1.4 The transfer time between two boxes should not exceed 3 minutes. 6.7.2 Test content
Same as 6.6.2.
6.8 protection level
According to the regulations of GB/T4942.1.
7 Durability
7.1 Test requirements and methods
7.1.1 The device shown in Figure 1 is used for the test. 7.1.2 The fan operates continuously under calibrated working conditions (the fan generator should also be under rated output power) (interruptions are allowed, but each operation time is not less than 6 hours).
7.1.3 The cumulative operating time is 3000h.
7.2 Test content and data calculation
Measured according to specified working conditions:
a) Appearance and assembly quality of the fan before and after the test (coating, paint layer, label, tight circumference parts and fan axial movement) 12
JB/T6723.4-1999
b) Fan performance under calibration conditions before and after the test: c) The fan generator should also be measured Cold operating performance before and after the test, and calculate the reduction rate AP of the rated output power according to equation (4):
Bz-P×100%
AP
where: △P——Rated output power reduction rate, %; R
P..-The rated output power of the fan generator after the test, W; Psz-——The rated output power of the fan generator after the test, W. 8 Instrumentation and accuracy requirements
8.1 The instruments and meters used for testing should be calibrated to be qualified. 8.2 The air volume and static pressure are measured with a blower and a micromanometer. The accuracy of the micromanometer is not less than ±0.1Pa. 8.3 The accuracy of the rotation speed measuring device should not be lower than level 0.5. 8.4 The accuracy of the power (torque) measuring device should not be lower than level 1.5. 8.5 The noise is measured with a precision sound pressure meter, and its graduation value should not be greater than 0.5dB(A). 8.6 The graduation value of the atmospheric pressure gauge should not be greater than 10Pa. The graduation value of the thermometer should not be greater than 0.5K. 8.7
8.8 The accuracy of the voltmeter should not be lower than level 0.5, and the accuracy of other electrical measuring instruments should not be lower than level 1. Result analysis and documentation
9
Test and calculation results should be analyzed and compiled into documents. The contents of the document include: a) Test name;
b) Source of task:
c) Model and quantity of the fans tested:
d) Unit and sampling method of the fans tested: e ) Test content and methods;
f) Test equipment and diagram and main instruments, instruments and equipment: 8) Test results and data calculation:
h) Analysis and conclusion;
) Testing unit, test location, date; J) Main test personnel and approval records;
k) Fan performance curve and test records.
·(4)
13
A1 typical fan characteristic curve is shown in Figure A1. JB/T 6723.4-1999
Appendix A
(prompted appendix)
Fan characteristic curve
Wind room model: FF1840 JB/T6723.31999 Sample receiving unit ：XXXXXX
Detection unit: XXXX×X
Impeller outer diameter D: 180mm
Calibrated speed: 6500r/min
Calibrated air volume: 1050ml/h||tt ||a=7150r/mir
6500
4875
3250
800
static
original 600||
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