CN104034377A - Air compressor flow measurement device and calibration system and method thereof - Google Patents
Air compressor flow measurement device and calibration system and method thereof Download PDFInfo
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Abstract
Disclosed are an air compressor flow measurement device and a calibration system and method thereof. The air compressor flow measurement device is disposed on the intake side of an air compressor to be measure and comprises a housing with an air pass opening; a flow measurement unit is mounted on the wall of the housing; the flow measurement unit comprises a hot-film air flow sensor, a data processing unit and a data interface connected in order. The air compressor flow measurement device is small in size, low in cost, simple in structure and convenient to mount. The calibration method is provided in order to acquire characteristic curves of flow of the air compressor and electrical signals that the air compressor flow measurement device outputs. The calibration system comprises the air compressor flow measurement device, the air compressor, an air reservoir, a regulating valve and a standard flowmeter which are disposed on a pipeline sequentially along the air flow direction; both the standard flowmeter and the air compressor flow measurement device are connected with a data collection and processing device. By calibration, the air compressor flow measurement device can output accurate flow of the air compressor even when mounted on the intake side.
Description
Technical field
The invention belongs to mechanical field, be specifically related to a kind of air compressor flow measurement device and calibration system and scaling method.
Background technology
Air compressor is the main body of compressed air source unit, and it is the mechanical energy of prime mover to be converted into the device of gaseous tension energy, is compressed-air actuated pressure generator.Air compressor flow refers to the interior discharge of air compressor unit interval, is converted into the volumetric flow rate under air-suction state; Air compressor air inflow referred in the unit interval, and air compressor air inlet side sucks the volumetric flow rate of gas; Due to the operating characteristic of air compressor, in its course of work, there is the reasons such as Leakage Gas, make air compressor flow in fact be less than air compressor air inflow.Due to strength, be one of important parameter of air compressor operation, obtain fast and accurately the flow of air compressor for the operational efficiency that improves air compressor, the important in inhibitings such as economy.In air compressor industry, measuring flow mainly adopts the classic methods such as ASME nozzle at present, although classic method measuring accuracy is higher, but because it must be arranged on the exhaust side of compressor, complex installation process and complex structure, with high costs, cannot realize on-line proving, these deficiencies have limited the use occasion of traditional measurement method, make the measurement of flow in air compressor industry, do not popularized in a large number.
Summary of the invention
The object of the invention is to solve above-mentioned the deficiencies in the prior art, provide a kind of easy for installation, simple in structure, lower-cost air compressor flow measurement device and calibration system and scaling method.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of air compressor flow measurement device, it is arranged on the air inlet side of air compressor to be measured, comprise the housing with air ports, flow measurement unit is installed on the wall of housing, wherein flow measurement unit comprises the hot diaphragm type air flow sensor of the electric signal while flowing through for measurement gas, for the treatment of the data processing unit of the electric signal recording with for the data-interface to data acquisition and treatment facility by the electrical signal transfer after processing, hot diaphragm type air flow sensor, data processing unit is connected successively with data-interface, and hot diaphragm type air flow sensor is positioned at the cavity of housing, data-interface is positioned at the wall outside of housing.
Before the air inlet side of described air compressor refers to the air intake filter of air compressor or between the air intake filter of air compressor and the compression chamber of air compressor.
The inside of described housing is provided with for adjustments of gas the fair water fin of the flow state in housing.
On the wall of described housing, leave for the opening of flow measurement unit is installed, flow measurement cellular installation is at opening part.
Described housing is circular pipe type housing.
The calibration system of air compressor flow measurement device, comprise the air compressor flow measurement device, air compressor, gas-holder, variable valve and the proving flowmeter that are successively set on pipeline, wherein proving flowmeter is arranged on the exhaust side of air compressor, air compressor flow measurement device is arranged on the air inlet side of air compressor, and proving flowmeter is connected with treatment facility with data acquisition respectively with air compressor flow measurement device.
Described proving flowmeter comprises ASME nozzle flowmeter.
Described data acquisition and treatment facility are PC.
The scaling method of air compressor flow measurement device, comprises the following steps:
1) open air compressor, within the scope of the rated speed of air compressor, the rotating speed that regulates successively air compressor is default different rotating speeds N
1, N
2, N
3... N
n, and regulate variable valve take to guarantee that the discharge pressure of air compressor under each rotating speed is its specified supply gas pressure; Wherein n is the rotational speed regulation number of times of default air compressor, N
nit is the rotating speed of the air compressor of the n time adjusting;
2) with proving flowmeter, record different rotating speeds N
1, N
2, N
3... N
nthe volumetric flow of gas of lower air compressor exhaust side and the thermophysical parameter of gas;
3) by data acquisition and treatment facility according to step 2) data that record calculate different rotating speeds N
1, N
2, N
3... N
nthe gas mass flow of lower air compressor exhaust side;
4) by data acquisition and treatment facility according to step 3) gas mass flow of the air compressor exhaust side that calculates, and according to the air heat physical parameter of air compressor air inlet side, be converted into the volumetric flow of gas of air compressor air inlet side under corresponding rotating speed;
5) with data acquisition and treatment facility, record different rotating speeds N
1, N
2, N
3... N
nunder the corresponding electric signal of air compressor flow measurement device;
6) with data acquisition and treatment facility, generate the volumetric flow rate of air compressor flow measurement device and the characteristic curve of electric signal, complete the demarcation to air compressor flow measurement device.
The thermophysical parameter of described gas comprises density, temperature, humidity and the pressure of air.
With respect to prior art, the present invention has following beneficial effect:
Tradition flowmeter is bulky, complex structure, and all needs to be arranged on the gas exhaust piping of air compressor, and installation process is very loaded down with trivial details.The present invention has adopted volume is little, accuracy is high hot diaphragm type air flow sensor as the core cell of measuring flow, volume and the system complex degree of flowmeter have greatly been reduced, and hot diaphragm type air flow sensor price is comparatively cheap, reduced hardware cost, proposed to be arranged on air compressor air inlet side simultaneously, with respect to tradition, be placed in the flowmeter of air compressor exhaust side, greatly simplified its installation process, be beneficial to popularizing of product.
Operating characteristic due to air compressor, directly by flowmeter from exhaust side change into be arranged on air inlet side obviously cannot Measurement accuracy flow, therefore the invention provides a kind of scaling method of air compressor flow measurement device, proving flowmeter is arranged on to the exhaust side of air compressor, flow measurement device to be measured is arranged on to air inlet side, through the too much simple test of group, can obtain the characteristic curve between the flow of air compressor and electric signal that air compressor flow measurement device is exported, when using air compressor flow measurement device to measure air compressor flow, with the electric signal that the characteristic curve obtaining records air compressor flow measurement device, revise, can obtain measurement result comparatively accurately, thereby can guarantee that flowmeter is arranged on to air inlet side also can export the flow of air compressor accurately.
In order to implement the scaling method of above-mentioned air compressor flow measurement device, the measuring system that must depend on air compressor flow measurement device is carried out, calibration system provided by the invention is simple in structure, install and use very conveniently, adopting data acquisition and treatment facility to improve robotization and the intelligent degree of data acquisition and processing; Be convenient to air compressor flow measurement device to demarcate.
Accompanying drawing explanation
Fig. 1 is the structural representation of air compressor flow measurement device provided by the invention;
Fig. 2 is the structural representation of the calibration system of air compressor flow measurement device provided by the invention;
In figure: 1 is housing, 2 is fair water fin, and 3 is flow measurement unit, and 4 is hot diaphragm type air flow sensor, 5 is data processing unit, 6 is data-interface, and 7 is air compressor, and 8 is gas-holder, 9 is variable valve, 10 is proving flowmeter, and 11 is air compressor flow measurement device, and 12 is data acquisition and treatment facility.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be described in detail.
As shown in Figure 1, air compressor flow measurement device provided by the invention is arranged on the air inlet side of air compressor, comprises housing 1, fair water fin 2, flow measurement unit 3;
Before the air inlet side of described air compressor refers to the air intake filter of air compressor or between the air intake filter of air compressor and the compression chamber of air compressor;
Described housing 1 is the circular pipe type object with air ports, and its positioned inside has fair water fin 2 and flow measurement unit 3, leaves the opening of settling described flow measurement unit 3 on its wall;
Described fair water fin 2 is arranged on housing 1 inside, and the flow state for adjustments of gas in housing 1 flows it more even, is conducive to improve the accuracy of measurement result;
Described flow measurement unit 3 comprises successively connected hot diaphragm type air flow sensor 4, data processing unit 5 and data-interface 6, hot diaphragm type air flow sensor is positioned at the cavity of housing, data-interface is positioned at the wall outside of housing, electric signal when described hot diaphragm type air flow sensor 4 flows through for measurement gas, passed to data processing unit 5, described data processing unit 5 obtains hot diaphragm type air flow sensor 4 and transmits the electric signal of coming, described data-interface 6 for electrical signal transfer that data processing unit 5 is generated to data acquisition and treatment facility,
The core of a kind of air compressor flow measurement device provided by the present invention is to use hot diaphragm type air flow sensor as the core component of measuring, and be arranged on the air inlet side of air compressor, and the unconventional exhaust side that is installed on air compressor.Adopt hot diaphragm type air flow sensor can greatly reduce volume and the system complex degree of flow measurement device as the core component of measuring, hot diaphragm type air flow sensor price is comparatively cheap simultaneously, has reduced hardware cost.The air inlet side that is arranged on air compressor can be utilized the little advantage of hot diaphragm type air flow sensor volume, before being arranged on the air intake filter of air compressor or between air intake filter and compression chamber, especially for connecting the unit of gas exhaust piping, greatly reduce the difficulty of installation.
If but directly by take the air compressor flow measurement device that hot diaphragm type air flow sensor is core, be arranged on front end, it is the air inflow of air compressor by what record, but not the flow of air compressor.The air inflow of air compressor referred in the unit interval, the volumetric flow rate of the gas that the air inlet side of air compressor sucks, and the flow of air compressor referred in the unit interval, the gas that the exhaust side of air compressor is discharged, is converted into the volumetric flow rate under suction condition.Due to the operating characteristic of air compressor, in its course of work, can have the factors such as Leakage Gas, so the flow of air compressor is less than the air inflow of air compressor.As certain type screw air compressor, its rated flow is 3.1 cubic meters per minute, but its air inflow is about 3.3 cubic meters per minute.Obviously, the air inlet side that direct flow measurement device is arranged on air compressor will cause measured flow value to be greater than actual flow, therefore must again demarcate flow measurement device.
For demarcating the calibration system of described air compressor flow measurement device, comprise along airflow direction and be successively set on air compressor flow measurement device 11, the air compressor 7 on pipeline, gas-holder 8, variable valve 9 and proving flowmeter 10, proving flowmeter 10 is connected with treatment facility 12 respectively at data acquisition with air compressor flow measurement device 11; Described proving flowmeter 10 is arranged on the exhaust side of air compressor 7; Described air compressor flow measurement device 11 is arranged on the air inlet side of air compressor 7; Described data acquisition and treatment facility 12 are realized by computer;
Gas-holder 8 and variable valve 9 are for regulating the supply gas pressure of air compressor 7, to reach its specified supply gas pressure; Proving flowmeter 10 is traditional flowmeter, and as ASME nozzle flowmeter etc., it is arranged on the exhaust side of air compressor 7, and the flow being recorded is demarcated the air compressor flow measurement device 11 that is installed on air compressor air inlet side as exact value.
The core of the scaling method of air compressor flow measurement device provided by the invention is proving flowmeter 10 to be arranged on to the exhaust side of air compressor 7, air compressor flow measurement device 11 to be calibrated is arranged on to the air inlet side of air compressor 7; Adopt computer as the key equipment of data acquisition and processing, improved robotization and the intelligent degree of data acquisition and processing; And the fundamental purpose of this scaling method is the characteristic curve obtaining between the flow of air compressor and electric signal that air compressor flow measurement device 11 is exported.
The scaling method of air compressor flow measurement device provided by the invention comprises the following steps:
1) open air compressor, within the scope of the rated speed of air compressor, the rotating speed that regulates successively air compressor is default different rotating speeds N
1, N
2, N
3... N
n, and regulate variable valve take to guarantee that the discharge pressure of air compressor under each rotating speed is its specified supply gas pressure; Wherein n is the rotational speed regulation number of times of default air compressor, N
nit is the rotating speed of the air compressor of the n time adjusting;
2) with proving flowmeter, record different rotating speeds N
1, N
2, N
3... N
nthe volumetric flow of gas of lower air compressor exhaust side and the thermophysical parameter of gas; The thermophysical parameter of described gas comprises density, temperature, humidity and the pressure of air;
3) by data acquisition and treatment facility according to step 2) data that record calculate different rotating speeds N
1, N
2, N
3... N
nthe gas mass flow of lower air compressor exhaust side;
4) by data acquisition and treatment facility according to step 3) gas mass flow of the air compressor exhaust side that calculates, and according to the air heat physical parameter of air compressor air inlet side, be converted into the volumetric flow of gas of air compressor air inlet side under corresponding rotating speed;
5) with data acquisition and treatment facility, record different rotating speeds N
1, N
2, N
3... N
nunder the corresponding electric signal of air compressor flow measurement device;
6) with data acquisition and treatment facility, generate the volumetric flow rate of air compressor flow measurement device and the characteristic curve of electric signal, complete the demarcation to air compressor flow measurement device.
While using air compressor flow measurement device 11 to measure air compressor flow, with the electric signal that the characteristic curve generating records air compressor flow measurement device 11, revise, can obtain measurement result comparatively accurately
Certain specific rotation speeds of certain air compressor of take is below example, and scaling method of the present invention is given an example, and those skilled in the art should be noted that this is not determinate.
1) by the rotational speed regulation of air compressor 7, be 3000rpm, regulate the aperture of variable valve 9, make the discharge pressure of air compressor 7 reach its specified supply gas pressure, and stable operation certain hour;
2) to record the volumetric flow rate of air compressor 7 exhaust sides under 3000rpm be 0.4 cubic meters per minute to proving flowmeter 10, gas temperature 330K, air pressure 0.8MPa, humidity 30%;
3) to calculate the now gas mass flow of the exhaust side of air compressor 7 be 3kg/min for data acquisition and treatment facility 12;
4) data acquisition and treatment facility 12 is according to the gaseous state of air compressor 7 air inlet sides: temperature 293K now, humidity 30%, pressure 0.1MPa is in conjunction with gas mass flow 3kg/min, and calculating the volumetric flow of gas that is scaled air inlet side is 3 cubic meters per minute;
5) data acquisition and treatment facility 12 are recorded now air compressor flow measurement device 11 and are transmitted the electric signal of coming, and electric signal is 1.3mV;
6) regulating successively the rotating speed of air compressor 7 is 2900,2800,2700......1000rpm, and the volumetric flow of gas and the air compressor flow measurement device 11 that record the air compressor 7 air inlet sides under different rotating speeds transmit the electric signal of coming;
7) generate the volumetric flow of gas of air compressor 7 air inlet sides and the characteristic curve that air compressor flow measurement device 11 transmits between next electric signal, complete demarcation.
In sum, the present invention proposes the theory that flow measurement device is installed on to air compressor air inlet side, and select hot diaphragm type air flow sensor as the core cell of measuring flow, simplified the structure of measurement mechanism, reduced hardware cost.For solving, be directly installed on the inaccurate problem of compressor air inlet side existence measurement simultaneously, a kind of scaling method is provided, efficiently solve the problems referred to above.
The above is the description to one embodiment of the present invention, but not determinate, one of ordinary skilled in the art is by reading instructions of the present invention, in the situation that not departing from spirit of the present invention and purport, any equivalence that technical solution of the present invention is adopted changes, and is claim of the present invention and contains.
Claims (10)
1. an air compressor flow measurement device, it is characterized in that: it is arranged on the air inlet side of air compressor to be measured, comprise the housing (1) with air ports, flow measurement unit (3) is installed on the wall of housing (1), wherein flow measurement unit (3) comprise the hot diaphragm type air flow sensor (4) of the electric signal while flowing through for measurement gas, for the treatment of the data processing unit (5) of the electric signal recording with for the data-interface (6) to data acquisition and treatment facility (12) by the electrical signal transfer after processing, hot diaphragm type air flow sensor (4), data processing unit (5) is connected successively with data-interface (6), and hot diaphragm type air flow sensor (4) is positioned at the cavity of housing (1), data-interface (6) is positioned at the wall outside of housing (1).
2. air compressor flow measurement device according to claim 1, is characterized in that: before the air inlet side of described air compressor refers to the air intake filter of air compressor or between the air intake filter of air compressor and the compression chamber of air compressor.
3. air compressor flow measurement device according to claim 1 and 2, is characterized in that: the inside of described housing (1) is provided with the fair water fin (2) of the flow state in housing (1) for adjustments of gas.
4. air compressor flow measurement device according to claim 1 and 2, is characterized in that: on the wall of described housing (1), leave for the opening of flow measurement unit (3) is installed, flow measurement unit (3) are arranged on opening part.
5. air compressor flow measurement device according to claim 1 and 2, is characterized in that: described housing (1) is circular pipe type housing.
6. the calibration system of the air compressor flow measurement device as described in any one in claim 1-5, it is characterized in that: comprise the air compressor flow measurement device (11) being successively set on pipeline, air compressor (7), gas-holder (8), variable valve (9) and proving flowmeter (10), wherein proving flowmeter (10) is arranged on the exhaust side of air compressor (7), air compressor flow measurement device (11) is arranged on the air inlet side of air compressor (7), proving flowmeter (10) is connected with treatment facility (12) with data acquisition respectively with air compressor flow measurement device (11).
7. the calibration system of air compressor flow measurement device according to claim 6, is characterized in that: described proving flowmeter (10) comprises ASME nozzle flowmeter.
8. according to the calibration system of the air compressor flow measurement device described in claim 6 or 7, it is characterized in that: described data acquisition and treatment facility (12) are PC.
9. a scaling method for the air compressor flow measurement device of the calibration system of the air compressor flow measurement device based on described in any one in claim 6-8, is characterized in that, comprises the following steps:
1) open air compressor (7), within the scope of the rated speed of air compressor (7), the rotating speed that regulates successively air compressor (7) is default different rotating speeds N
1, N
2, N
3... N
n, and regulate variable valve (9) take to guarantee that the discharge pressure of air compressor under each rotating speed (7) is its specified supply gas pressure; Wherein n is the rotational speed regulation number of times of default air compressor, N
nit is the rotating speed of the air compressor of the n time adjusting;
2) with proving flowmeter (10), record different rotating speeds N
1, N
2, N
3... N
nthe volumetric flow of gas of lower air compressor (7) exhaust side and the thermophysical parameter of gas;
3) by data acquisition and treatment facility (12) according to step 2) data that record calculate different rotating speeds N
1, N
2, N
3... N
nthe gas mass flow of lower air compressor (7) exhaust side;
4) by data acquisition and treatment facility (12) according to step 3) gas mass flow of air compressor (7) exhaust side that calculates, and according to the air heat physical parameter of air compressor (7) air inlet side, be converted into the volumetric flow of gas of air compressor under corresponding rotating speed (7) air inlet side;
5) with data acquisition and treatment facility (12), record different rotating speeds N
1, N
2, N
3... N
nunder the corresponding electric signal of air compressor flow measurement device (11);
6) with data acquisition and treatment facility (12), generate the volumetric flow rate of air compressor flow measurement device (11) and the characteristic curve of electric signal, complete the demarcation to air compressor flow measurement device (11).
10. the scaling method of air compressor flow measurement device according to claim 9, is characterized in that: the thermophysical parameter of described gas comprises the density of air, temperature, humidity and pressure.
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| CN201410270209.XA CN104034377B (en) | 2014-06-17 | 2014-06-17 | Air compressor flow measurement device and calibration system and method thereof |
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|---|---|---|---|
| CN201410270209.XA CN104034377B (en) | 2014-06-17 | 2014-06-17 | Air compressor flow measurement device and calibration system and method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105716669A (en) * | 2016-03-18 | 2016-06-29 | 浙江西田机械有限公司 | Turbine compressor flow detection device |
| CN106382973A (en) * | 2016-08-31 | 2017-02-08 | 南昌工控电装有限公司 | Air flow sensor calibration device |
| CN108036833A (en) * | 2017-12-28 | 2018-05-15 | 潍柴动力股份有限公司 | Air cleaner flow measuring structure and engine assembly |
| CN108931277A (en) * | 2018-07-06 | 2018-12-04 | 西安工程大学 | A kind of detection method of the total leakage rate of textile mills' compressed air system |
| CN111855141A (en) * | 2020-07-21 | 2020-10-30 | 浙江科维节能技术股份有限公司 | Method for obtaining nozzle coefficient of ASME nozzle measuring device |
| CN113482902A (en) * | 2021-06-08 | 2021-10-08 | 苏州东泽物联科技有限公司 | Actual measurement and real marking system and method for air compressor |
| CN115342867A (en) * | 2022-07-26 | 2022-11-15 | 桐乡泰爱斯环保能源有限公司 | Compressed air flow measuring and calculating method and device based on heat and humidity balance |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108036833A (en) * | 2017-12-28 | 2018-05-15 | 潍柴动力股份有限公司 | Air cleaner flow measuring structure and engine assembly |
| CN108931277A (en) * | 2018-07-06 | 2018-12-04 | 西安工程大学 | A kind of detection method of the total leakage rate of textile mills' compressed air system |
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| CN113482902A (en) * | 2021-06-08 | 2021-10-08 | 苏州东泽物联科技有限公司 | Actual measurement and real marking system and method for air compressor |
| CN115342867A (en) * | 2022-07-26 | 2022-11-15 | 桐乡泰爱斯环保能源有限公司 | Compressed air flow measuring and calculating method and device based on heat and humidity balance |
| CN115342867B (en) * | 2022-07-26 | 2023-11-17 | 桐乡泰爱斯环保能源有限公司 | Compressed air flow measuring and calculating method based on heat-humidity balance |
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| CN104034377B (en) | 2017-02-08 |
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