Device for detecting air output performance of air blower

Abstract

The utility model discloses a blower air output performance detection device, which comprises an air duct system, test instruments and meters and a measurement and control hardware unit, the air duct system comprises a square pipeline, an air static pressure front pipe section and the like and is connected with a tested blower to form an air flow channel, and the test instruments and meters such as a pressure tester, a differential pressure type flowmeter and the like are connected with the measurement and control hardware unit. A plurality of parameters such as air volume and air pressure are collected in real time, a measurement and control hardware unit is powered by a power supply cabinet and an isolation voltage-stabilized power supply, a PLC verification control cabinet communicates with a central core industrial personal computer and is connected with an instrument, the air pressure measurement range of the device is-100 Pa to 1000 Pa, a plurality of differential pressure type flowmeters are connected in parallel, a performance curve is generated, a report is output, the standard air suction working condition is met, and the measurement and control precision is high. The adjustable pipeline support is adaptive to fans of multiple sizes, accurate and efficient detection is guaranteed, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial test field, concretely say a kind of air volume detection device of air blower. BACKGROUND

[0002] With the continuous development of various production technology, mechanical technology, electronic technology and automation control technology, people's application requirements of various air blowers in different fields are higher and higher, especially as the power source for gas flow measurement and detection, the performance of various types of air blowers needs to be detected, and the test parameters can be curve fitted, and the performance curve of fan is output. These test research and measurement work need to be carried out on the gas power performance, noise performance and mechanical running performance detection of the whole machine of the air volume performance detection device meeting the characteristics of air blower, so a kind of air volume performance detection device of air blower is needed, which is accurate, stable in performance, safe and reliable, wide in flow range, high in detection efficiency, low in labor intensity and can realize automatic detection. UTILITY MODEL CONTENT

[0003] To solve the above problems, the utility model discloses an air volume performance detection device of air blower.

[0004] The specific technical scheme is as follows:

[0005] An air volume performance detection device of air blower comprises:

[0006] An air duct system is composed of a square pipe, a gas static pressure front pipe section, a gas dynamic pressure rear pipe section, a rectifier grid, a flow regulating valve, a silencer and an adjustable pipe support, and is used to connect the measured fan and form a gas flow channel;

[0007] Test instruments and meters include pressure testers, differential pressure flowmeters, differential pressure transmitters, temperature transmitters, wind speed testers, precision noise level meters, power meters and speed and torque meters, and are used to collect wind volume, wind pressure, temperature, wind speed, shaft power, noise and speed and torque parameters in real time;

[0008] A measurement and control hardware unit includes a power cabinet, an isolation voltage stabilizer, a PLC calibration control cabinet and a central core industrial computer; the PLC calibration control cabinet is connected with the central core industrial computer through a TCP communication module, and is electrically connected with the test instruments and meters; the power cabinet supplies power to the test instruments and meters and the measurement and control hardware unit through the isolation voltage stabilizer.

[0009] In the air duct system:

[0010] The gas static pressure front pipe section and the gas dynamic pressure rear pipe section are respectively provided with pressure testers and differential pressure transmitters, which are used to collect full pressure, static pressure and differential pressure data;

[0011] The rectifier grid is installed between the gas static pressure front pipe section and the gas dynamic pressure rear pipe section, used for decomposing vortex and stabilizing flow field.

[0012] The flow regulating valve is arranged inside the wall of the gas dynamic pressure rear pipe section, and the gas dynamic pressure rear pipe section is connected with the silencer, and the pipe support is placed below the gas static pressure front pipe section and the gas dynamic pressure rear pipe section through the flange.

[0013] In the test instrument:

[0014] The precision noise sound level meter is arranged near the square pipe, the wind speed tester is arranged in the gas dynamic pressure rear pipe section, the temperature transmitter is arranged in the gas dynamic pressure rear pipe section, the differential pressure flowmeter is arranged between the gas static pressure front pipe section and the gas dynamic pressure rear pipe section, and is connected with the gas static pressure front pipe section and the gas dynamic pressure rear pipe section respectively, the differential pressure transmitter is also connected with the gas static pressure front pipe section and the gas dynamic pressure rear pipe section, the pressure tester is arranged in the gas static pressure front pipe section, the power instrument is connected with the motor of the measured fan, and the speed and torque instrument is connected with the transmission device of the measured fan.

[0015] The differential pressure flowmeter is a plurality of parallel combination structures, the flow measurement range is 10-20000 m3 / h, and the accuracy level meets the 1.5 level requirement of verification.

[0016] The computer automatic measurement and control system realizes data fusion through a special verification software system, generates a performance curve of the wind volume, wind pressure, shaft power, noise and speed and torque parameters, and outputs a test report.

[0017] The wind pressure measurement range of the device covers-100 Pa to 1000 Pa, and the static pressure measurement repeatability deviation is less than or equal to ±1.5%.

[0018] The precision noise sound level meter adopts a double-channel differential measurement method, and is used for analyzing the noise spectrum of the measured fan under different operating states.

[0019] The power instrument and the speed and torque instrument work cooperatively, and the shaft power of the measured fan is calculated through the electric measurement method.

[0020] The flow regulating valve dynamically adjusts the pipe cross-sectional area according to the test requirement, and optimizes the operating parameters of the measured fan in combination with a closed-loop control algorithm.

[0021] The device meets the standard suction working condition: temperature 20℃, pressure 101.3 kPa, relative humidity 65%, and air density 1.2 kg / m3, and the test result is converted into standard working condition data through working condition correction.

[0022] The adjustable pipe support supports the installation of measured fans of different sizes, and ensures that the pipe connection is leak-free.

[0023] The advantages of this utility model are: multiple differential pressure flow meters are arranged in parallel, which can be used individually or combined for expansion, covering a flow range of 10 to 20,000 m3 / h; the measurement and control hardware unit is centrally arranged, reducing external interference and improving system reliability; and the collected wind pressure data is processed and analyzed in real time to ensure the real-time performance and accuracy of the wind pressure data. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] A blower output performance testing device, comprising:

[0027] The duct system consists of a square pipe 2, a gas static pressure pre-pipe section 3, a gas dynamic pressure post-pipe section 5, a flow rectifier 4, a flow regulating valve 6, a silencer 7, and an adjustable pipe support 8; it is used to connect the fan under test 1 and form a gas flow channel.

[0028] The testing instruments include a pressure tester 14, a differential pressure flow meter 12, a micro differential pressure transmitter 13, a temperature transmitter 11, an anemometer 10, a precision noise level meter 9, a power meter 15, and a speed and torque meter 16; used to collect air volume, air pressure, temperature, air speed, shaft power, noise, and speed and torque parameters in real time.

[0029] The measurement and control hardware unit includes a power supply cabinet 17, an isolated regulated power supply 18, a PLC calibration control cabinet 19, and a central core industrial control computer 20. The PLC calibration control cabinet 19 and the central core industrial control computer 20 are connected via a TCP communication module and are electrically connected to the test instrument group. The power supply cabinet 17 supplies power to the test instrument group and the measurement and control hardware unit via the isolated regulated power supply 18.

[0030] The air duct system:

[0031] The gas static pressure pre-pipe section 3 and the gas dynamic pressure post-pipe section 5 are respectively equipped with a pressure tester 14 and a differential pressure transmitter 13 for collecting total pressure, static pressure and differential pressure data.

[0032] The rectifier grid 4 is installed between the gas static pressure front pipe section 3 and the gas dynamic pressure rear pipe section 5 to decompose eddies and stabilize the flow field.

[0033] The flow regulating valve 6 is arranged inside the wall of the post-gas-dynamic pipe section 5, and the post-gas-dynamic pipe section 5 is connected with the silencer 7, and the adjustable pipe support 8 is arranged below the post-gas-dynamic pipe section 5 and the pre-gas-static pipe section 3 through flanges.

[0034] In the test instrument:

[0035] The precision noise sound level meter 9 is arranged near the square pipe 2, the wind speed tester 10 is arranged in the post-gas-dynamic pipe section 5, the temperature transmitter 11 is arranged in the post-gas-dynamic pipe section 5, the differential pressure flowmeter 12 is arranged between the pre-gas-static pipe section 3 and the post-gas-dynamic pipe section 5 and connected with the pre-gas-static pipe section 3 and the post-gas-dynamic pipe section 5 respectively, the differential pressure transmitter 13 is also connected with the pre-gas-static pipe section 3 and the post-gas-dynamic pipe section 5, the pressure tester 14 is arranged in the pre-gas-static pipe section 3, the power meter 15 is connected with the motor of the measured fan 1, and the rotational speed and torque meter 16 is connected with the transmission device of the measured fan 1.

[0036] The differential pressure flowmeter 12 is a plurality of parallel combination structures, the flow measurement range is 10-20000 m3 / h, and the accuracy level meets the 1.5-level requirement of verification.

[0037] The computer automatic measurement and control system realizes data fusion through a special verification software system 21, generates a performance curve of air volume, air pressure, shaft power, noise and rotational speed and torque parameters, and outputs a test report.

[0038] The air pressure measurement range of the device covers -100 Pa to 1000 Pa, and the static pressure measurement repeatability deviation is less than or equal to ±1.5%.

[0039] The precision noise sound level meter 9 adopts a double-channel differential measurement method and is used for analyzing the noise spectrum of the measured fan 1 under different operating states.

[0040] The power meter 15 and the rotational speed and torque meter 16 work cooperatively, and the shaft power of the measured fan 1 is calculated through an electric measurement method.

[0041] The flow regulating valve 6 dynamically adjusts the pipe cross-sectional area according to test requirements, and combines a closed-loop control algorithm to optimize the operating parameters of the measured fan 1.

[0042] The device meets the standard suction working condition: temperature 20 DEG C, pressure 101.3 kPa, relative humidity 65%, air density 1.2 kg / m3, and the test result is converted into standard working condition data through working condition correction.

[0043] The adjustable pipe support 8 supports the installation of measured fans 1 of different sizes and ensures that the pipe connection is leak-free.

[0044] The working principle of the utility model is that:

[0045] After the fan is started, the gas flows through the duct system: in turn through the gas static pressure front pipe section, the rectifier grid, the gas dynamic pressure rear pipe section, the flow regulating valve and the silencer, and finally discharged to the atmosphere.

[0046] The rectifier grid decomposes large-scale vortex into uniform small vortex, reduces turbulence intensity and ensures stable flow field; the flow regulating valve dynamically adjusts the pipe cross-sectional area to optimize gas flow rate.

[0047] The gas static pressure front pipe section and the gas dynamic pressure rear pipe section are connected with the pressure tester and the differential pressure transmitter through the pressure measuring hole, respectively, to collect static pressure, dynamic pressure and differential pressure data in real time; the differential pressure flowmeter calculates the air volume according to the differential pressure signal generated by the gas flow rate, and the parallel design of multiple units can cover a wide flow range (10-20000 m3 / h) and ensure 1.5 level precision; the wind speed tester converts the wind speed by measuring the dynamic pressure in the pipeline; the precision noise sound level meter adopts a double-channel structure to capture the noise frequency spectrum at the inlet and outlet of the fan, respectively; the power meter and the speed and torque meter cooperate to measure the input power of the motor and the shaft power of the fan, and evaluate the mechanical efficiency in combination with the speed data.

[0048] Closed-loop control and data processing

[0049] The PLC test control cabinet receives the instructions of the central core industrial computer, adjusts the speed of the tested fan through the built-in frequency conversion speed regulation module, and forms a closed-loop control loop.

[0050] The test data (air volume, air pressure, noise, power, etc.) are transmitted in real time from the instrument group to the industrial computer, and after being summarized, the performance parameter table and the test report are generated through the printer 22,

[0051] The adjustable pipe support adjusts the height and angle to adapt to different sizes of fan flange interface, ensuring the sealing connection; stable power is provided for the system to reduce the influence of external interference on the measurement accuracy.

Claims

1. A device for testing the air output performance of a blower, characterized in that, include: The duct system consists of square pipes, a gas static pressure pre-pipe section, a gas dynamic pressure post-pipe section, a rectifier grid, a flow regulating valve, a silencer, and adjustable pipe supports; the testing instruments include a pressure tester, a differential pressure flow meter, a micro differential pressure transmitter, a temperature transmitter, an anemometer, a precision noise level meter, a power meter, and a speed and torque meter; the measurement and control hardware unit includes a power cabinet, an isolated regulated power supply, a PLC calibration control cabinet, and a central core industrial control computer; the PLC calibration control cabinet is connected to the central core industrial control computer via a TCP communication module and is electrically connected to the testing instrument group; the power cabinet supplies power to the testing instrument group and the measurement and control hardware unit via an isolated regulated power supply.

2. The blower air output performance testing device according to claim 1, characterized in that, The air duct system: Pressure testing instruments and differential pressure transmitters are respectively installed in the gas static pressure pre-pipe section and the gas dynamic pressure post-pipe section; The rectifier grille is installed between the gas static pressure front pipe section and the gas dynamic pressure rear pipe section; The flow regulating valve is installed inside the wall of the gas dynamic pressure downstream pipe section, and the gas dynamic pressure downstream pipe section is connected to the silencer. The adjustable pipe support is placed below the gas static pressure upstream pipe section and the gas dynamic pressure downstream pipe section through a flange.

3. The blower air output performance testing device according to claim 1, characterized in that, In the aforementioned testing instruments: A precision noise level meter is installed near the square pipe; an anemometer is installed inside the gas dynamic pressure section; a temperature transmitter is installed inside the gas dynamic pressure section; a differential pressure flow meter is installed between the gas static pressure section and the gas dynamic pressure section, and is connected to both sections respectively; a micro differential pressure transmitter is also connected to both sections; a pressure meter is installed inside the gas static pressure section; a power meter is connected to the motor of the fan under test; and a speed and torque meter is connected to the transmission device of the fan under test.

4. The blower air output performance testing device according to claim 1, characterized in that: The differential pressure flow meter is a multi-unit parallel combination structure, with a flow measurement range of 10 to 20,000 m³ / h.

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