CN109899312B - Fan pressure reduction performance testing method - Google Patents
Fan pressure reduction performance testing method Download PDFInfo
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- CN109899312B CN109899312B CN201910360848.8A CN201910360848A CN109899312B CN 109899312 B CN109899312 B CN 109899312B CN 201910360848 A CN201910360848 A CN 201910360848A CN 109899312 B CN109899312 B CN 109899312B
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Abstract
A method for testing the pressure reduction performance of a fan comprises the following steps: mounting a device to be tested on the adapter; controlling the fan according to a flow pressure value input by the upper computer; the wind speed and wind pressure measuring instrument detects the flow of the input end and the output end of the valve, and the pressure detector detects the pressure of a pressure measuring point on the adapter; adjusting a valve and a fan to ensure that the output flow is constant; displaying the flow value and the pressure value of the wind speed and wind pressure measuring instrument and the pressure value of the pressure detector; the upper computer receives the relevant detection data and generates a corresponding curve; and changing the flow value, repeating the operation, and performing quadratic curve fitting according to the pressure of the pressure measurement point and the flow speed converted to the adapter. The invention can carry out more precise test on the product, is convenient to know the influence of the pressure generated by the product in a closed environment and under different flow rates on the performance of the product, and further can analyze the product with higher precision and more perfect so as to improve the product with high quality.
Description
Technical Field
The invention relates to the technical field of intelligent home testing, in particular to a method for testing the pressure reduction performance of a fan.
Background
Some products used at ordinary times, such as a turbine of a sweeper, are often required to be correspondingly tested so as to ensure the quality of the products;
however, the existing testing method cannot test the product more precisely, is difficult to know the influence of the pressure generated in the closed environment and under different flow rates on the performance of the product, cannot analyze the product more perfectly, and is not convenient for improving the quality of the product.
Disclosure of Invention
Objects of the invention
In order to solve the technical problems in the background art, the invention provides a fan pressure reduction performance testing method, which can be used for more precisely testing some products at ordinary times, is convenient for knowing the influence of the pressure generated by the products in a closed environment and under different flow rates on the product performance, and can be used for more precisely and more perfectly analyzing the products so as to improve the products in high quality.
(II) technical scheme
In order to solve the problems, the invention provides a method for testing the pressure reduction performance of a fan, which comprises the following steps:
s1, assembling the test instrument, and mounting the device to be tested on the adapter;
s2, inputting a flow pressure value through an upper computer;
s3, controlling the fan according to the flow pressure value input by the upper computer;
s4, detecting the flow of the valve input end and the valve output end by the wind speed and wind pressure measuring instrument, and detecting the pressure of a pressure measuring point on the adapter by the pressure detector;
s5, adjusting the valve and the fan according to the flow data fed back by the wind speed and wind pressure measuring instrument to make the output flow constant;
s6, displaying the flow value and the pressure value of the wind speed and wind pressure measuring instrument and the pressure value of the pressure measuring instrument;
s7, the upper computer receives the relevant detection data, and each test value is displayed on software and generates a corresponding curve;
and S8, changing the flow value, repeating the operation, and performing quadratic curve fitting according to the pressure of the pressure measuring point and the flow speed converted to the adapter.
Preferably, in S1, the test instrument includes a PQ box, a fan, an upper computer, a valve, an adapter, a servo motor, two sets of wind speed and pressure measuring instruments, a pressure measuring instrument, and a connecting pipe;
the fan is arranged in the PQ box; the input end of the connecting pipeline is connected with the air outlet end of the fan, and the output end of the connecting pipeline is connected with the adapter; the valve and the two groups of wind speed and wind pressure measuring instruments are arranged on the connecting pipeline, and the wind speed and wind pressure measuring instruments are positioned on two sides of the valve; the adapter is provided with a pressure measuring point, and the pressure detector is arranged on the adapter; the servo motor controls the opening and closing of the valve;
a central processing unit is arranged in the upper computer; the upper computer is in communication connection with the servo motor, the fan, the wind speed and wind pressure measuring instrument and the pressure detector.
Preferably, the test mode includes a free mode, a PQ tank mode, a constant flow rate mode, and a constant pressure mode.
Preferably, the air volume is 510m3the/H fan with stepless speed regulation can meet the constant flow speed of 0.3-50 m/s.
Preferably, the valve is a high-precision electric valve with a communication function, and can be used for adjusting the valve to be opened and closed and controlling the output flow according to a program instruction.
Preferably, the valve satisfies a control accuracy of 1%.
Preferably, the pressure detector is a digital display pressure gauge with a communication function.
Preferably, the detection feedback speed of the wind speed and wind pressure measuring instrument is within 1 s.
Preferably, the wind speed and wind pressure measuring instrument controls the flow accuracy to be 5%.
Preferably, in S7, the generated curve is a pressure versus flow graph.
The technical scheme of the invention has the following beneficial technical effects:
the pressure sensor can test some products more precisely at ordinary times, the influence of the pressure generated by the products in a closed environment and under different flow rates on the performance of the products can be conveniently known, and then the products can be analyzed with higher precision and more perfectly, so that the products can be improved in high quality.
Drawings
Fig. 1 is a system block diagram of a method for testing the pressure reduction performance of a fan according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1, the method for testing the pressure reduction performance of the fan provided by the invention comprises the following steps:
s1, assembling the test instrument, and mounting the device to be tested on the adapter;
s2, inputting a flow pressure value through an upper computer;
s3, controlling the fan according to the flow pressure value input by the upper computer;
s4, detecting the flow of the valve input end and the valve output end by the wind speed and wind pressure measuring instrument, and detecting the pressure of a pressure measuring point on the adapter by the pressure detector;
s5, adjusting the valve and the fan according to the flow data fed back by the wind speed and wind pressure measuring instrument to make the output flow constant;
s6, displaying the flow value and the pressure value of the wind speed and wind pressure measuring instrument and the pressure value of the pressure measuring instrument;
s7, the upper computer receives the relevant detection data, and each test value is displayed on software and generates a corresponding curve;
and S8, changing the flow value, repeating the operation, and performing quadratic curve fitting according to the pressure of the pressure measuring point and the flow speed converted to the adapter.
In an alternative embodiment, in S1, the test instrument includes a PQ box, a fan, an upper computer, a valve, an adapter, a servo motor, two sets of wind speed and wind pressure measuring instruments, a pressure detector and a connecting pipe;
the fan is arranged in the PQ box; the input end of the connecting pipeline is connected with the air outlet end of the fan, and the output end of the connecting pipeline is connected with the adapter; the valve and the two groups of wind speed and wind pressure measuring instruments are arranged on the connecting pipeline, and the wind speed and wind pressure measuring instruments are positioned on two sides of the valve; the adapter is provided with a pressure measuring point, and the pressure detector is arranged on the adapter; the servo motor controls the opening and closing of the valve;
a central processing unit is arranged in the upper computer; the upper computer is in communication connection with the servo motor, the fan, the wind speed and wind pressure measuring instrument and the pressure detector.
In an alternative embodiment, the test modes include a free mode, a P-Q tank mode, a constant flow mode, and a constant pressure mode;
PQ tank mode: the aperture of the valve is 50mm, the valve is closed, and the equivalent opening diameter of the valve is equivalent to the standard value of the standard PQ box outlet diameter such as 50mm, 40mm, 30mm, 23mm, 13mm, 6.5mm and the like;
constant flow rate mode: the change of the external opening, namely the change of the system resistance, can adjust the flow of the outlet to be constant all the time;
constant voltage mode: changing the external regulation allows the outlet pressure, i.e. the measured value in the pressure gauge, to be always at a constant value.
In an alternative embodiment, an air volume of 510m is used3the/H fan with stepless speed regulation can meet the constant flow speed of 0.3-50 m/s.
In an optional embodiment, the valve is a high-precision electric valve with a communication function, the valve can be adjusted to be opened and closed and output flow can be controlled according to a program instruction, the valve meets the control precision of 1%, the control precision is high, and the valve can be conveniently controlled to be opened and closed.
In an alternative embodiment, the pressure detector is a digital display pressure gauge with a communication function.
In an optional embodiment, the detection feedback speed of the wind speed and wind pressure measuring instrument is within 1s, the wind speed and wind pressure measuring instrument controls the flow accuracy to be 5%, the control accuracy is high, and the detection feedback speed is high.
In an alternative embodiment, in S7, the generated curve is a pressure versus flow graph.
In an alternative embodiment, to ensure the stability and accuracy of the tested values, the connecting pipes with the outer diameter of 56mm, the inner diameter of 50mm and the length of 400mm are selected after the test (the pipes on both sides of the valve are ensured to reach the relative length, and the excessive proximity and the excessive error are prevented.
Firstly, assembling a test instrument, and mounting a device to be tested on an adapter; the adapter is connected with the valve outlet and the device to be tested, and the adapter can be replaced according to different sizes of the device to be tested, so that the diversity of products can be dealt with; inputting a flow pressure value through an upper computer and controlling the fan according to the flow pressure value input by the upper computer; the wind speed and wind pressure measuring instrument detects the flow of the input end and the output end of the valve, and the pressure detector detects the pressure of a pressure measuring point on the adapter; adjusting a valve and a fan according to flow data fed back by the wind speed and wind pressure measuring instrument to ensure that the output flow is constant; displaying the flow value and the pressure value of the wind speed and wind pressure measuring instrument and the pressure value of the pressure detecting instrument; the upper computer receives the relevant detection data, and each test value is displayed on software to generate a corresponding curve; changing the flow value, repeating the operations, and performing quadratic curve fitting according to the pressure of the pressure measurement point and the flow speed converted to the adapter;
the method comprises the steps of testing a pressure and flow curve graph obtained by testing an initial fan turbine (without putting a product in an idle test) so as to obtain current and voltage in the state, sealing the position of a fan, and putting a product which is not started to obtain secondary curve fitting of the corresponding pressure and flow curve graph; the pressure intensity analysis device can be used for more precisely testing products (such as a turbine of a sweeper) at ordinary times, and can be used for analyzing the products with higher precision and more perfectly aiming at the influence of the pressure intensity of the products on the performance of the products in a closed environment and under different flow rates, so that the products can be improved in high quality.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. A method for testing the pressure reduction performance of a fan is characterized by comprising the following steps:
s1, assembling the test instrument, and mounting the device to be tested on the adapter;
s2, inputting a flow pressure value through an upper computer;
s3, controlling the fan according to the flow pressure value input by the upper computer;
s4, detecting the flow of the valve input end and the valve output end by the wind speed and wind pressure measuring instrument, and detecting the pressure of a pressure measuring point on the adapter by the pressure detector;
s5, adjusting the valve and the fan according to the flow data fed back by the wind speed and wind pressure measuring instrument to make the output flow constant;
s6, displaying the flow value and the pressure value of the wind speed and wind pressure measuring instrument and the pressure value of the pressure measuring instrument;
s7, the upper computer receives the relevant detection data, and each test value is displayed on software and generates a corresponding curve;
s8, changing the flow value, repeating the above operations, fitting a quadratic curve according to the pressure of the pressure measuring point and the flow speed converted to the adapter,
in S1, the test instrument comprises a PQ box, a fan, an upper computer, a valve, an adapter, a servo motor, two groups of wind speed and wind pressure measuring instruments, a pressure detector and a connecting pipeline;
the fan is arranged in the PQ box; the input end of the connecting pipeline is connected with the air outlet end of the fan, and the output end of the connecting pipeline is connected with the adapter; the valve and the two groups of wind speed and wind pressure measuring instruments are arranged on the connecting pipeline, and the wind speed and wind pressure measuring instruments are positioned on two sides of the valve; the adapter is provided with a pressure measuring point, and the pressure detector is arranged on the adapter; the servo motor controls the opening and closing of the valve;
a central processing unit is arranged in the upper computer; the upper computer is in communication connection with the servo motor, the fan, the wind speed and wind pressure measuring instrument and the pressure detector.
2. The method for testing the pressure reduction performance of the fan according to claim 1, wherein the test modes include a free mode, a PQ tank mode, a constant flow mode and a constant pressure mode.
3. The method for testing the pressure reduction performance of the fan according to claim 1, wherein the adopted air volume is 510m3the/H fan with stepless speed regulation can meet the constant flow speed of 0.3-50 m/s.
4. The method for testing the pressure reduction performance of the fan according to claim 1, wherein the valve is a high-precision electric valve with a communication function, and can be used for adjusting the opening and closing of the valve and controlling the output flow according to a program instruction.
5. The fan decompression performance testing method according to claim 1, wherein the valve meets 1% control accuracy.
6. The method for testing the pressure reduction performance of the fan according to claim 1, wherein the pressure detector is a digital display pressure gauge with a communication function.
7. The method of claim 1, wherein the feedback speed of the wind speed and wind pressure measuring instrument is within 1 s.
8. The method for testing the pressure reduction performance of the fan according to claim 1, wherein the wind speed and wind pressure measuring instrument controls the flow accuracy to be 5%.
9. The fan pressure reduction performance test method according to claim 1, wherein in S7, the generated curve is a pressure-flow curve.
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| CN201910360848.8A CN109899312B (en) | 2019-04-30 | 2019-04-30 | Fan pressure reduction performance testing method |
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| CN201910360848.8A CN109899312B (en) | 2019-04-30 | 2019-04-30 | Fan pressure reduction performance testing method |
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| CN109899312B true CN109899312B (en) | 2021-05-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001041856A (en) * | 1999-07-28 | 2001-02-16 | Ishikawajima Harima Heavy Ind Co Ltd | Apparatus for testing efficiency of differential carbon seal |
| CN101526419A (en) * | 2009-04-09 | 2009-09-09 | 杭州杭氧股份有限公司 | Flow characteristics test method and device of a plate-fin heat exchanger fin |
| GB2468571B (en) * | 2010-03-01 | 2011-01-26 | Flakt Woods Ltd | A method of detecting and controlling stall in an axial fan |
| CN103016380B (en) * | 2012-12-05 | 2015-02-18 | 西安理工大学 | Method for determining performance of blade tip clearance region of cooling fan of automobile engine |
| CN104280069B (en) * | 2014-09-26 | 2017-05-31 | 博罗县仁凯工控器材有限公司 | A kind of air pressure air flow test device and method of testing |
| CN205805980U (en) * | 2016-06-23 | 2016-12-14 | 杭州索川科技有限公司 | A kind of test system of blower fan |
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