Fan Airflow Test Stand

One Overview

The air volume measurement test device is an air volume testing system manufactured according to IEC standards.

The basic testing principle is to simulate the actual working state of the test sample in the testing wind tunnel (using an auxiliary fan to make the outlet pressure of the test sample consistent with the requirements), then measure the pressure difference on both sides of the nozzle in the wind tunnel, calculate the corresponding wind speed using a standard formula, and finally multiply it by the nozzle area and relevant flow coefficient to obtain the air volume.

The device adopts a computer automatic measurement and control method, which only requires manual installation of the test sample and replacement of the nozzle. The entire process of testing one test sample only takes ten minutes. It can measure the corresponding curves of static pressure and air volume, air volume and speed, current, power, efficiency, etc. It is also possible to inhale and expel the test sample

Test in two different states. It has the characteristics of convenience, speed, stability, reliability, and good reproducibility. Satisfy the testing and use of related products in scientific research and production processes.

1. Product Name: Airflow Measurement Test Device

2. Model and specification: DMS-FS

3. Standard basis: IEC61591, GB/T1236, GB/T14806 and related product standards.

4. Applicable products: industrial fans, cooling fans, axial fans, ventilation fans, range hoods, supply fans, etc.

5. Performance and feature requirements:

1) The device adopts a multi nozzle wind chamber structure. The corresponding nozzle can be selected based on the measured flow rate, so a device can measure a wide range of flow rates.

2) Equipped with an auxiliary fan, the full range performance curve with zero flow rate and zero static pressure can be measured.

3) Automated testing, calculation, and data output are achieved through computers and their peripheral devices, with graphical display and printing of test results. The human-machine dialogue operation is simple, with high accuracy, saving time and effort.

4) Test items: P-Q characteristics (relationship between flow rate and static pressure) Q-η

Main technical parameters and indicators

1. Laboratory power supply: AC 220V/AC 380V 50HZ; capacity: 5KVA

2. Laboratory environment: 20 ℃± 5 ℃ Humidity: 30% -80% Atmospheric pressure: Normal

3. Measurement range of air volume: (0.06m3-50m3)/min

4. Static differential pressure: 0-2250Pa ± 0.2% Pa

5. Electrical parameters: The measurement accuracy of voltage, current, and power is level 0.5, with digital display instruments

Range: Voltage AC 0-300V

Current AC 0-5A

Power range 0-1000W

6. Speed: 0-19999 revolutions per minute ± 5RPM digital display

7. Air temperature: -10-100 ℃± 0.5 ℃

8. Air humidity: (5-99)% R · H ± 5%

9. Variable frequency stabilized power supply:

Input voltage: AC 220V 50HZ

Output voltage: AC 0-110V-220V -300V continuously adjustable, ≤ 1%

Output frequency: 50HZ or 60HZ

Output power: 0-1000W

10. Operating condition testing, automatically adjustable flow orifice plate for testing and calculating items.

1）. Static pressure measured inside the pressure reducing cylinder: Ps6 (Pa)

2）. Input power: P (W)

3）. Airflow under experimental conditions: Qv (m3/s)

4）. Total pressure under test conditions: Pfb (Pa)

5）. Total pressure of air standard state: Pfbn (Pa)

6）. Static pressure under experimental conditions: Ps2n (pa)

7）. Total pressure efficiency under experimental conditions: η (%)

11. The measurement results that can be automatically calculated by the computer after the test is completed;

1）. Maximum static pressure (static pressure value at zero air volume): Ps2n (max) Pa

2）. Maximum airflow (airflow value at zero static pressure): Qv (max) m3/min

3）. Static pressure at specified air volume (7m3/min): Ps2ns Pa

4）. Main motor input power at specified air volume (7m3/min): P W

5）. Total pressure efficiency at specified air volume (7m3/min): η%

12. It can measure the corresponding curves of static pressure and air volume, air volume and speed, current, power, efficiency, etc. The test sample can also be tested in both inhalation and excretion states.

13. Summary of testing ranges for various parameters

Accuracy within the scope of the project unit

Airflow m3/min 0.06-50 ± 1% at maximum airflow of each nozzle

Static pressure/differential pressure Pa 0-1250 ± 0.2%

RPM 0~19999 ± 5 RPM

Current A 0-20 ± 0.5%

Voltage V 0-300 ± 0.5%

Power W 0-1000 ± 0.5%

Temperature ℃ -10~100 ± 0.5 ℃

Humidity range of 5% to 99 ± 5%

Air pressure h Pa 940-1060 ± 2 h Pa

4、 Requirements for device composition

The device consists of a main body and a computational system.

1. Main equipment

1) Wind chamber

The cross-sectional size of the wind chamber shall not exceed: length 2200 x width 1800 mm x height 1800 mm

Weight not exceeding: 300kg

2) Auxiliary fan

Meet the maximum requirement of 50m3/min 1000Pa

Variable speed control is achieved through a frequency converter. Weight not exceeding: 50kg

3) Nozzle

Use 4 different specifications of nozzles, totaling 10 (1 each for diameter 20 and 30, and 2 each for diameter 50, 60, 80, and 120). Scope of application for each nozzle

Spray nozzle diameter in mm, quantity of air flow in m3/min, differential pressure in Pa

20 1 0.3～1.0 50～700

30 1 0.6～1.5 50～700

50 2 each 1.2~4.1 50~700

60 2, each 1.5~5.6, 50~700

80 2 each 2.7~10.0 50~700

120 2, each ranging from 6.0 to 22.4, 50 to 700

The nozzle conversion is done manually, and the nozzle chamber is equipped with transparent doors that can be opened and closed, providing sufficient space for manual operation.