CN104034377B - 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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- CN104034377B CN104034377B CN201410270209.XA CN201410270209A CN104034377B CN 104034377 B CN104034377 B CN 104034377B CN 201410270209 A CN201410270209 A CN 201410270209A CN 104034377 B CN104034377 B CN 104034377B
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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 is and in particular to a kind of air compressor flow measurement device and its calibration system and mark
Determine method.
Background technology
Air compressor is the main body of compressed air source unit, and it is the dress that the mechanical energy of prime mover is converted into gas pressure energy
Put, be the pressure generator of compressed air.Air compressor flow refers to discharge in the air compressor unit interval, conversion
Become the volume flow under air-suction state；Air compressor air inflow refers in the unit interval, and air compressor air inlet side sucks
The volume flow of gas；Due to the operating characteristic of air compressor, exist in its work process gas leakage etc. reason so that
Air compressor flow is actually less than air compressor air inflow.Because strength is the important parameter that air compressor runs
One of, for the operational efficiency improving air compressor, economy etc. has the flow fast and accurately obtaining air compressor
Significance.In air compressor industry, measurement flow mainly adopts the traditional methods such as ASME nozzle at present, although traditional method
Certainty of measurement is higher, but because it is necessarily mounted at the exhaust side of compressor, complex installation process and complex structure, high cost
High, on-line proving cannot be realized, these deficiencies limit the use occasion of traditional measurement method so as to the measurement of flow not
Popularized in a large number in air compressor industry.
Content of the invention
It is an object of the invention to solving above-mentioned the deficiencies in the prior art, provide a kind of easy for installation, structure is simple, cost
Relatively low air compressor flow measurement device and its calibration system and scaling method.
For reaching above-mentioned purpose, 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, including band
There is the housing of air ports, the wall of housing is provided with airflow measurement unit, wherein airflow measurement unit is included for surveying
The hot diaphragm type air flow sensor of signal of telecommunication when amount gas flows through, the data processing unit for processing the signal of telecommunication recording
With the data-interface for the signal of telecommunication after processing being passed to data acquisition and procession equipment, hot diaphragm type air mass flow sensing
Device, data processing unit data interface are sequentially connected, and hot diaphragm type air flow sensor is located in the cavity of housing, data
Interface is located at outside the wall of housing.
Before the air inlet side of described air compressor refers to the air intake filter of air compressor or the entering of air compressor
Between air filter and the compression chamber of air compressor.
The inside of described housing is provided with the deflector for adjusting flow regime in housing for the gas.
Opening for installing airflow measurement unit is left on the wall of described housing, airflow measurement unit is arranged on out
At mouthful.
Described housing is pipe sandwich type element.
The calibration system of air compressor flow measurement device, including the air compressor flow being successively set on pipeline
Measurement apparatus, air compressor, air accumulator, regulating valve and proving flowmeter, wherein proving flowmeter are arranged on air compressor
Exhaust side, air compressor flow measurement device is arranged on the air inlet side of air compressor, proving flowmeter and air compression
Machine flow measurement device is connected with data acquisition and procession equipment respectively.
Described proving flowmeter includes ASME nozzle flowmeter.
Described data acquisition and procession equipment is PC.
The scaling method of air compressor flow measurement device, comprises the following steps：
1) open air compressor, in the nominal speed range of air compressor, adjust turning of air compressor successively
Speed is default different rotating speeds N1, N2, N3......Nn, and adjust regulating valve to ensure air compressor under each rotating speed
Pressure at expulsion is its specified supply gas pressure；Wherein n is the rotational speed regulation number of times of default air compressor, NnAdjust for n-th
The rotating speed of the air compressor of section；
2) record different rotating speeds N with proving flowmeter1, N2, N3......NnThe gas volume of lower air compressor exhaust side
Flow and the thermophysical parameter of gas；
3) by data acquisition and procession equipment according to step 2) data that records calculates different rotating speeds N1, N2,
N3......NnThe gas mass flow of lower air compressor exhaust side；
4) by data acquisition and procession equipment according to step 3) gas mass flow of air compressor exhaust side that calculates
Amount, and the gas thermophysical parameter according to air compressor air inlet side, are converted into air compressor air inlet under corresponding rotating speed
The volumetric flow of gas of side；
5) use data acquisition and procession equipment record different rotating speeds N1, N2, N3......NnUnder air compressor flow survey
The signal of telecommunication corresponding to amount device；
6) data acquisition and procession equipment is used to generate volume flow and the signal of telecommunication of air compressor flow measurement device
Characteristic curve, completes the demarcation to air compressor flow measurement device.
The thermophysical parameter of described gas includes density, temperature, humidity and the pressure of air.
With respect to prior art, the invention has the advantages that：
Conventional flow meters are bulky, complex structure, and on the gas exhaust piping being required for be arranged on air compressor, install
Process is extremely loaded down with trivial details.Present invention employs the high hot diaphragm type air flow sensor of small volume, accuracy as measurement flow
Core cell, substantially reduces volume and the system complexity of effusion meter, and hot diaphragm type air flow sensor price is relatively
For cheap, reduce hardware cost, propose simultaneously and be installed in air compressor air inlet side, be placed in sky with respect to tradition
The effusion meter of air compressor exhaust side, enormously simplify its installation process, popularizing beneficial to product.
Due to the operating characteristic of air compressor, directly being changed to be arranged on air inlet side from exhaust side by effusion meter is clearly no
Method accurately measures flow, therefore the invention provides a kind of scaling method of air compressor flow measurement device, by standard
Effusion meter is arranged on the exhaust side of air compressor, and flow measurement device to be measured is arranged on air inlet side, through multigroup simple
The feature that test can obtain between the signal of telecommunication that the flow of air compressor and air compressor flow measurement device are exported is bent
Line, using air compressor flow measurement device measurement air compressor flow when, with obtain characteristic curve to air pressure
The signal of telecommunication that contracting machine flow measurement device records is modified, you can obtains accurate measurement result, thereby may be ensured that
Effusion meter is arranged on the flow that air inlet side also can export accurate air compressor.
In order to implement the scaling method of above-mentioned air compressor flow measurement device it is necessary to depend on air compressor flow
Carrying out, the calibration system structure that the present invention provides is simple for the measuring system of measurement apparatus, installs and using very convenient, adopts
Data acquisition and procession equipment improves the intellectually and automatically degree of data acquisition and procession；It is easy to air compressor stream
Measuring device is demarcated.
Brief description
Fig. 1 is the structural representation of the air compressor flow measurement device that the present invention provides；
Fig. 2 is the structural representation of the calibration system of air compressor flow measurement device that the present invention provides；
In figure：1 is housing, and 2 is deflector, and 3 is airflow measurement unit, and 4 is hot diaphragm type air flow sensor, and 5 is number
According to processing unit, 6 is data-interface, and 7 is air compressor, and 8 is air accumulator, and 9 is regulating valve, and 10 is proving flowmeter, and 11 are
Air compressor flow measurement device, 12 is data acquisition and procession equipment.
Specific embodiment
The present invention will be described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the air compressor flow measurement device that the present invention provides is arranged on the air inlet side of air compressor,
Including housing 1, deflector 2, airflow measurement unit 3；
Before the air inlet side of described air compressor refers to the air intake filter of air compressor or air compressor air inlet
Between filter and the compression chamber of air compressor；
Described housing 1 is the circular pipe type object with air ports, and its positioned inside has deflector 2 and flow measurement list
Unit 3, its wall leaves the opening disposing described airflow measurement unit 3；
Described deflector 2 is arranged on inside housing 1, for adjusting flow regime in housing 1 for the gas so as to flow more
For uniform, be conducive to improving the accuracy of measurement result；
Described airflow measurement unit 3 includes hot diaphragm type air flow sensor 4, data processing unit 5 and being sequentially connected
Data-interface 6, hot diaphragm type air flow sensor is located in the cavity of housing, and data-interface is located at outside the wall of housing, institute
State hot diaphragm type air flow sensor 4 for measuring signal of telecommunication when gas flows through, pass it to data processing unit 5, institute
State data processing unit 5 and obtain the signal of telecommunication that hot diaphragm type air flow sensor 4 transmission comes, described data-interface 6 is used for number
Pass to data acquisition and procession equipment according to the signal of telecommunication that processing unit 5 generates；
A kind of core of air compressor flow measurement device provided by the present invention is using hot diaphragm type air mass flow
Sensor is as the core component of measurement, and is installed in the air inlet side of air compressor, and unconventional is installed on air
The exhaust side of compressor.Flow measurement can be substantially reduced as the core component of measurement using hot diaphragm type air flow sensor
The volume of device and system complexity, hot diaphragm type air flow sensor price is more cheap simultaneously, reduces hardware cost.
And the air inlet side being installed in air compressor then can utilize the advantage of hot diaphragm type air flow sensor small volume, by it
Before being arranged on the air intake filter of air compressor or between air intake filter and compression chamber, particularly with having connected aerofluxuss
For the unit of pipeline, greatly reduce the difficulty of installation.
But if directly by the air compressor flow measurement device peace with hot diaphragm type air flow sensor as core
Be contained in front end, then its by record be air compressor air inflow, rather than the flow of air compressor.The entering of air compressor
Tolerance refers in the unit interval, the volume flow of the gas of air inlet side suction of air compressor, and the stream of air compressor
Amount refers in the unit interval, and the exhaust side expellant gas of air compressor are converted into the volume flow under suction condition.By
In the operating characteristic of air compressor, in its work process, can there is the factors, the therefore flow of air compressor such as gas leakage
It is less than the air inflow of air compressor.As certain type screw air compressor, its metered flow is 3.1 cubic meters per minute, but its
Air inflow is about 3.3 cubic meters per minute.Obviously, direct flow measurement apparatus are arranged on the air inlet side of air compressor and will lead
Measured flow value is caused to be more than actual flow it is therefore necessary to flow measurement device re-scales.
For demarcating the calibration system of described air compressor flow measurement device, set gradually including along airflow direction
Air compressor flow measurement device 11 on pipeline, air compressor 7, air accumulator 8, regulating valve 9 and proving flowmeter 10,
Proving flowmeter 10 is connected respectively at data acquisition and procession equipment 12 with air compressor flow measurement device 11；Described standard
Effusion meter 10 is arranged on the exhaust side of air compressor 7；Described air compressor flow measurement device 11 is arranged on air compression
The air inlet side of machine 7；Described data acquisition and procession equipment 12 to be realized by computer；
Air accumulator 8 and regulating valve 9 are the supply gas pressures for adjusting air compressor 7, to reach its specified confession air pressure
Power；Proving flowmeter 10 is traditional effusion meter, such as ASME nozzle flowmeter etc., and it is arranged on the exhaust side of air compressor 7,
The flow being recorded to demarcate the air compressor flow measurement device being installed on air compressor air inlet side as exact value
11.
The core of the scaling method of air compressor flow measurement device that the present invention provides is to pacify proving flowmeter 10
It is contained in the exhaust side of air compressor 7, air compressor flow measurement device 11 to be calibrated is arranged on air compressor 7
Air inlet side；Using computer as the key equipment of data acquisition and procession, improve automatization and the intelligence of data acquisition and procession
Degree can be changed；And the main purpose of this scaling method is to obtain flow and the air compressor flow measurement device of air compressor
Characteristic curve between 11 signals of telecommunication being exported.
The scaling method of the air compressor flow measurement device that the present invention provides comprises the following steps：
1) open air compressor, in the nominal speed range of air compressor, adjust turning of air compressor successively
Speed is default different rotating speeds N1, N2, N3......Nn, and adjust regulating valve to ensure air compressor under each rotating speed
Pressure at expulsion is its specified supply gas pressure；Wherein n is the rotational speed regulation number of times of default air compressor, NnAdjust for n-th
The rotating speed of the air compressor of section；
2) record different rotating speeds N with proving flowmeter1, N2, N3......NnThe gas volume of lower air compressor exhaust side
Flow and the thermophysical parameter of gas；The thermophysical parameter of described gas includes density, temperature, humidity and the pressure of air；
3) by data acquisition and procession equipment according to step 2) data that records calculates different rotating speeds N1, N2,
N3......NnThe gas mass flow of lower air compressor exhaust side；
4) by data acquisition and procession equipment according to step 3) gas mass flow of air compressor exhaust side that calculates
Amount, and the gas thermophysical parameter according to air compressor air inlet side, are converted into air compressor air inlet under corresponding rotating speed
The volumetric flow of gas of side；
5) use data acquisition and procession equipment record different rotating speeds N1, N2, N3......NnUnder air compressor flow survey
The signal of telecommunication corresponding to amount device；
6) data acquisition and procession equipment is used to generate volume flow and the signal of telecommunication of air compressor flow measurement device
Characteristic curve, completes the demarcation to air compressor flow measurement device.
Using air compressor flow measurement device 11 measurement air compressor flow when, with generate characteristic curve to sky
The signal of telecommunication that air compressor flow measurement device 11 records is modified, you can obtain accurate measurement result
Below taking certain specific rotation speeds of certain air compressor as a example, the scaling method of the present invention is illustrated, ability
Technical staff in domain should be noted that this is not determinate.
1) rotational speed regulation of air compressor 7 is 3000rpm, the aperture adjusting regulating valve 9 is so that air compressor 7
Pressure at expulsion reach its specified supply gas pressure, and stable operation certain time；
2) proving flowmeter 10 record air compressor 7 exhaust side at 3,000 rpm volume flow be 0.4 cubic metre/
Minute, gas temperature 330K, air pressure 0.8MPa, humidity 30%；
3) gas mass flow that data acquisition and procession equipment 12 calculates the now exhaust side of air compressor 7 is
3kg/min；
4) data acquisition and procession equipment 12 is according to the gaseous state of now air compressor 7 air inlet side：Temperature 293K, wet
Degree 30%, pressure 0.1MPa bound gas mass flow 3kg/min, calculate be scaled air inlet side volumetric flow of gas be 3
Cubic meters per minute；
5) data acquisition and procession equipment 12 records the telecommunications that now air compressor flow measurement device 11 transmission comes
Number, the signal of telecommunication is 1.3mV；
6) rotating speed adjusting air compressor 7 successively is 2900,2800,2700......1000rpm, records different rotating speeds
Under the signal of telecommunication that comes of the volumetric flow of gas of air compressor 7 air inlet side and air compressor flow measurement device 11 transmission；
7) generate the volumetric flow of gas of air compressor 7 air inlet side and air compressor flow measurement device 11 transmission comes
The signal of telecommunication between characteristic curve, complete demarcate.
In sum, the present invention proposes the theory that flow measurement device is installed on air compressor air inlet side, and selects
With hot diaphragm type air flow sensor as the core cell of measurement flow, simplify the structure of measurement apparatus, reduce hardware
Cost.It is directly installed on compressor air inlet side for solution simultaneously and there is the inaccurate problem of measurement, there is provided a kind of scaling method,
Efficiently solve the problems referred to above.
The above is the description to one embodiment of the present invention, rather than determinate, common skill in the art
Art personnel pass through to read description of the invention, in the case of the spirit without departing from the present invention with purport, to the technology of the present invention side
Any equivalence changes that case is adopted, the claim being the present invention is covered.
Claims (7)
1. a kind of calibration system of air compressor flow measurement device it is characterised in that：Including being successively set on pipeline
Air compressor flow measurement device (11), air compressor (7), air accumulator (8), regulating valve (9) and proving flowmeter (10),
Wherein proving flowmeter (10) is arranged on the exhaust side of air compressor (7), and air compressor flow measurement device (11) is installed
In the air inlet side of air compressor (7), proving flowmeter (10) and air compressor flow measurement device (11) respectively with data
Collection is connected with processing equipment (12), and wherein, air compressor flow measurement device (11) includes the shell with air ports
Body (1), the wall of housing (1) is provided with airflow measurement unit (3), and wherein airflow measurement unit (3) is included for measuring gas
The hot diaphragm type air flow sensor (4) of signal of telecommunication when body flows through, the data processing unit for processing the signal of telecommunication recording
(5) with for the signal of telecommunication after processing being passed to the data-interface (6) of data acquisition and procession equipment (12), hot diaphragm type air
Flow transducer (4), data processing unit (5) data interface (6) are sequentially connected, and hot diaphragm type air flow sensor (4)
In the cavity of housing (1), data-interface (6) is located at outside the wall of housing (1), and the inside of described housing (1) is provided with
For adjusting the deflector (2) of flow regime in housing (1) for the gas, the described wall of housing (1) leaves for pacifying
The opening of dress airflow measurement unit (3), airflow measurement unit (3) is arranged at opening.
2. air compressor flow measurement device according to claim 1 calibration system it is characterised in that：Described sky
Before the air inlet side of air compressor (7) refers to the air intake filter of air compressor (7) or air compressor (7) air intake filter
And the compression chamber of air compressor (7) between.
3. air compressor flow measurement device according to claim 1 and 2 calibration system it is characterised in that：Described
Housing (1) be pipe sandwich type element.
4. air compressor flow measurement device according to claim 1 calibration system it is characterised in that：Described mark
Quasi- effusion meter (10) includes ASME nozzle flowmeter.
5. the air compressor flow measurement device according to claim 1 or 4 calibration system it is characterised in that：Described
Data acquisition and procession equipment (12) be PC.
6. a kind of scaling method based on the air compressor flow measurement device described in any one in claim 1-5, its
It is characterised by, comprise the following steps：
1) open air compressor (7), in the nominal speed range of air compressor (7), adjust air compressor (7) successively
Rotating speed be default different rotating speeds N1, N2, N3......Nn, and adjust regulating valve (9) to ensure air pressure under each rotating speed
The pressure at expulsion of contracting machine (7) is its specified supply gas pressure；Wherein n is the rotational speed regulation number of times of default air compressor, Nn
The rotating speed of the air compressor adjusting for n-th；
2) record different rotating speeds N with proving flowmeter (10)1, N2, N3......NnThe gas body of lower air compressor (7) exhaust side
Long-pending flow and the thermophysical parameter of gas；
3) by data acquisition and procession equipment (12) according to step 2) data that records calculates different rotating speeds N1, N2,
N3......NnThe gas mass flow of lower air compressor (7) exhaust side；
4) by data acquisition and procession equipment (12) according to step 3) gaseous mass of air compressor (7) exhaust side that calculates
Flow, and the gas thermophysical parameter according to air compressor (7) air inlet side, are converted into air compressor under corresponding rotating speed
(7) volumetric flow of gas of air inlet side；
5) data acquisition and procession equipment (12) is used to record different rotating speeds N1, N2, N3......NnUnder air compressor flow survey
The signal of telecommunication corresponding to amount device (11)；
6) data acquisition and procession equipment (12) is used to generate volume flow and the telecommunications of air compressor flow measurement device (11)
Number characteristic curve, complete the demarcation to air compressor flow measurement device (11).
7. air compressor flow measurement device according to claim 6 scaling method it is characterised in that：Described gas
Thermophysical parameter include density, temperature, humidity and the pressure of air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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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 |
Applications Claiming Priority (1)
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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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| CN104034377A CN104034377A (en) | 2014-09-10 |
| CN104034377B true CN104034377B (en) | 2017-02-08 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108931277B (en) * | 2018-07-06 | 2020-06-19 | 西安工程大学 | Method for detecting total leakage of compressed air system of textile mill |
| 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 |
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4807150A (en) * | 1986-10-02 | 1989-02-21 | Phillips Petroleum Company | Constraint control for a compressor system |
| CN101126651A (en) * | 2007-09-18 | 2008-02-20 | 邵作友 | Hot film type air flowmeter |
| CN202008375U (en) * | 2011-01-24 | 2011-10-12 | 徐宗保 | Hot film type air mass flow meter |
| CN202531406U (en) * | 2011-12-22 | 2012-11-14 | 吉林大学 | Combustion-gas adaptive control system for combustion-gas type natural gas compressor |
| CN102937104A (en) * | 2012-10-30 | 2013-02-20 | 合肥通用机械研究院 | Turbine compressor test system |
| CN203441721U (en) * | 2013-07-25 | 2014-02-19 | 安徽工程大学 | Compressor test device |
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Inventor after: He Zhilong Inventor after: Wang Tao Inventor after: Guo Jun Inventor after: Xia Pu Inventor before: He Zhilong Inventor before: Guo Jun Inventor before: Xia Pu Inventor before: Wang Tao |
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Effective date of registration: 20180803 Address after: 200439 room 2425, 545-551 Jipu Road, Baoshan District, Shanghai. Patentee after: Shanghai step Mdt InfoTech Ltd Address before: 710049 Xianning West Road, Xi'an, Xi'an, Shaanxi Patentee before: Xi'an Jiaotong University |
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