CN110374857A - A kind of gentle pressure monitoring device of membrane compresses oil pressure and method - Google Patents
A kind of gentle pressure monitoring device of membrane compresses oil pressure and method Download PDFInfo
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- CN110374857A CN110374857A CN201910615493.2A CN201910615493A CN110374857A CN 110374857 A CN110374857 A CN 110374857A CN 201910615493 A CN201910615493 A CN 201910615493A CN 110374857 A CN110374857 A CN 110374857A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
- F04B45/053—Pumps having fluid drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- General Engineering & Computer Science (AREA)
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Abstract
The application belongs to Compressor Technology field, more particularly to a kind of gentle pressure monitoring device of membrane compresses oil pressure and method.The pressure ratio that can be run due to diaphragm type compressor is high, pressure limit is wide, and pressure at expulsion reaches as high as 300MPa, if not only influencing cylinder intensity, it is also possible to cause to leak, bring security risk using the method for processing pressure tap on cylinder body.This application provides a kind of monitoring devices of gentle pressure of membrane compresses oil pressure, including cylinder and foil gauge circuit, cylinder include cylinder head；Foil gauge circuit includes foil gauge component and bridge circuit interconnected, and foil gauge component is set on cylinder head.By the way that foil gauge component is set to cylinder head, foil gauge component is connected with bridge circuit, improves the sensitivity of foil gauge component, and makes to output and input in a linear relationship.Securely and reliably, not damaged to diaphragm type compressor, it can be achieved to be monitored the air pressure in the hydraulic and gas side cylinder head in the cylinder head of membrane compresses machine oil side especially under high pressure operating condition.
Description
Technical field
The application belongs to Compressor Technology field, more particularly to a kind of gentle pressure monitoring device of membrane compresses oil pressure and
Method.
Background technique
Membrane compressor is that there is no the gas compression special equipments of leakage for a kind of compression chamber.It can be provided due to it
Good seal performance, pressure limit are wide, compression is bigger, be therefore widely used in hydrogenation stations, compress in petrochemical industry it is defeated
Send various high-purity gas, valuable rare gas, toxic and harmful gas and corrosive gas.In diaphragm type compressor, pass through piston
Working fluid in pusher cylinder oil pocket, and then diaphragm is pushed to move reciprocatingly in membrane cavity, to change the swept volume of air cavity,
The periodic duty process of No leakage is realized under suction, the cooperation of exhaust valve.In the hydraulic oil circulating system of diaphragm type compressor,
Pass through the oil liquid of hydraulic piston ring leakage by compensation loop compensation, and is mended by installing spill valve on oily side cylinder head with adjusting
Oil mass.
The oil pressure and air pressure change of diaphragm type compressor are the concentrated expression of compressor operating performance and operating status, by every
The oil pressure and air pressure change curve of film compressor operation can reflect out piston position, breathing process time, inlet valve are opened
Movement, exhaust process time, oil spilling valve events and the oil replenishing process of movement, exhaust valve opening and the closing opening and close, therefore
Oil pressure, air pressure change curve are the diagnosis most effective tools of diaphragm type compressor compressor fault, are carried out to membrane compresses oil pressure
Dynamic monitoring be improve equipment reliability of operation, safety effective ways, ensure equipment monitoring running state be also every
The tight demand of film compressor designer and user.
The pressure ratio that can be run due to diaphragm type compressor is high, pressure limit is wide, and pressure at expulsion reaches as high as 300MPa, if adopted
With the method for processing pressure tap on cylinder body, the air pressure in the hydraulic and gas side cylinder head in the cylinder head of membrane compresses machine oil side is carried out
Monitoring not only influences cylinder intensity, it is also possible to cause to leak, bring security risk.
Summary of the invention
1. technical problems to be solved
Wide based on the pressure ratio height, pressure limit that can be run due to diaphragm type compressor, pressure at expulsion reaches as high as 300MPa, such as
Fruit is using the method for processing pressure tap on cylinder body, to the air pressure in the hydraulic and gas side cylinder head in the cylinder head of membrane compresses machine oil side
It is monitored, not only influences cylinder intensity, it is also possible to cause the problem of leaking, bringing security risk.This application provides one kind
The gentle pressure monitoring device of membrane compresses oil pressure and method.
2. technical solution
To achieve the above object, this application provides a kind of gentle pressure monitoring devices of membrane compresses oil pressure, including
Cylinder and foil gauge circuit；
The cylinder includes cylinder head and air release valve hole, and the air release valve hole is set on the cylinder head；
The foil gauge circuit includes foil gauge component and bridge circuit interconnected, and the foil gauge component includes the
One foil gauge group and the second foil gauge group, the first foil gauge group are set to the cylinder head outer surface, second foil gauge
Group is set to the air release valve hole baseplane, and the first foil gauge group is connected with the bridge circuit, second strain
Piece group is connected with the bridge circuit.
Optionally, the first foil gauge group includes the first foil gauge and the second foil gauge, first foil gauge and institute
The second foil gauge is stated to be arranged in a mutually vertical manner；
The second foil gauge group includes third foil gauge and the 4th foil gauge, and the third foil gauge is answered with the described 4th
Become piece to be arranged in a mutually vertical manner.
Optionally, the foil gauge component further includes third foil gauge group and the 4th foil gauge group；
The third foil gauge group is set on flange, and the flange is set on gas exhaust piping, the 4th foil gauge
Group is set on the flange.
Optionally, the foil gauge component is connected with half-bridge circuit.
Optionally, the foil gauge component is connected with full-bridge circuit.
It optionally, further include photoelectric sensing unit and data acquisition unit, the photoelectric sensing unit includes flywheel, described
Flywheel is corresponding to photoelectric sensor to be arranged, and the data acquisition unit is connected with the foil gauge component, the data acquisition
Unit is connected with the photoelectric sensor；The data acquisition unit is connected with data processing unit.
The application also provides a kind of gentle pressure monitoring method of membrane compresses oil pressure, and described method includes following steps:
Step 1, building strain measurement system: according to cylinder head size selection foil gauge model, by the foil gauge chosen into
Row connects electric bridge after pasting, after photoelectric sensor then is installed at flywheel, configuration data acquisition unit；
Step 2, acquisition signal: defeated by the data acquisition unit synchronous acquisition first voltage signal and foil gauge circuit
Second voltage signal out, while the first voltage signal of acquisition is converted into the first digital signal and is stored, by acquisition
Second voltage signal is converted to the second digital signal and is stored；
Step 3, the beginning and ending time that a complete cycle is judged according to the first digital signal；
Step 4, according to the beginning and ending time of one complete cycle, second digital signal is handled, is obtained
Oil pressure value and atmospheric pressure value.
Optionally, carrying out processing to second digital signal in the step 4 includes:
(1) according to the voltage data measured, the strain of working strain gauge is calculated separately out:
Wherein, θ represents crank angle, and ε (θ) is strain, and e (θ) is collected voltage signal, and μ is Poisson's ratio, and E is bullet
Property modulus, KsFor foil gauge sensitivity coefficient；
(2) oil pressure is calculated:
Cylinder head is reduced to round flat plate model, the radial stress of cylinder head outer surface foil gauge is calculated according to the strain gauge measured
And circumferential stress, then according to diaphragm type compressor structure, the boundary condition for bringing the periphery fixed plate of uniform load into is counted
Calculation obtains oil pressure value；
(3) air pressure is calculated:
According to the radial stress and circumferential stress of the strain calculation exhaust valve opening baseplane measured, gas is then calculated
Pressure value.
Optionally, first voltage signal described in the step 2 is converted by filtering, amplification, conditioning and A/D conversion
First digital data transmission is handled into intelligent terminal, and the second voltage signal is by filtering, amplification, conditioning and A/D
Conversion, is converted into the second digital data transmission and is handled into intelligent terminal.
3. beneficial effect
Compared with prior art, the beneficial effect of the gentle pressure monitoring device of membrane compresses oil pressure provided by the present application and method
Fruit is:
The gentle pressure monitoring device of membrane compresses oil pressure provided by the present application, by the way that foil gauge component is set to gas side cylinder
Foil gauge component is connected by head with bridge circuit, improves the sensitivity of foil gauge component, and makes to output and input linear pass
System.Due to the stickup foil gauge of the gas side cylinder head non-invasive in diaphragm type compressor, foil gauge component is set and measures gas side cylinder head
Strain, is measured oil pressure and air pressure indirectly, can be with lossless security measurement membrane compresses oil pressure.To membrane compresses
The accurate measurements of not damaged, the safe and reliable gentle lateral pressure of oil pressure achievable especially under the operating condition of high pressure of machine.
Detailed description of the invention
Fig. 1 is the gentle pressure monitoring device first structure diagram of membrane compresses oil pressure of the application；
Fig. 2 is the foil gauge arrangement schematic diagram of the application；
Fig. 3 is the foil gauge half-bridge connected mode schematic diagram of the application；
Fig. 4 is the gentle pressure monitoring device schematic illustration of membrane compresses oil pressure of the application；
Fig. 5 is that sensor measures oil pressure and gas side cylinder head foil gauge measures oil pressure data comparison schematic diagram；
Fig. 6 is that sensor measures air pressure and gas side cylinder head foil gauge measures barometric information contrast schematic diagram；
In figure: the gas side 1- cylinder head, 2- air release valve hole, the first foil gauge of 3-, the second foil gauge of 4-, 5- third foil gauge, 6-
4th foil gauge, 7- signal acquisition unit, 8- flywheel, 9- photoelectric sensor, 10- data processing unit.
Specific embodiment
Hereinafter, specific embodiment of the reference attached drawing to the application is described in detail, it is detailed according to these
Description, one of ordinary skill in the art can implement the application it can be clearly understood that the application.Without prejudice to the application principle
In the case where, the feature in each different embodiment can be combined to obtain new embodiment, or be substituted certain
Certain features in embodiment, obtain other preferred embodiments.
Foil gauge is the element being made of sensitive grid etc. for measuring strain.The working principle of resistance strain gage is to be based on answering
Change effect production, i.e., when conductor or semiconductor material generate mechanically deform under the action of external force, resistance value is corresponding
It changes, this phenomenon is known as " strain effect ".
For the quadrangle measurement bridge circuit being made of elements such as resistance, capacitor, inductance electric bridge, electric bridge four edges are bridge
Arm.As measuring circuit, DC power supply is connected at a diagonal line both ends of quadrangle, draws the electricity at another diagonal line both ends
Pressure, using bridge balance equation, can be acquired according to the numerical value of the well known elements in bridge arm detected element parameter (such as resistance,
Resistance, capacitor, inductance).
Referring to Fig. 1~6, the application provides a kind of gentle pressure monitoring device of membrane compresses oil pressure, including cylinder and strain
Piece circuit；
The cylinder includes cylinder head 1 and air release valve hole 2, and the air release valve hole 2 is set on the cylinder head 1；
The foil gauge circuit includes foil gauge component and bridge circuit interconnected, and the foil gauge component includes the
One foil gauge group and the second foil gauge group, the first foil gauge group are set to 1 outer surface of cylinder head, second foil gauge
Group is set to 2 baseplane of air release valve hole, and the first foil gauge group is connected with the bridge circuit, second strain
Piece group is connected with the bridge circuit.
Here cylinder head 1 is that gas side cylinder head or oily side cylinder head, foil gauge component are pasted onto gas side cylinder head by adhesive
Or on the cylinder head of oily side.The component for posting foil gauge component is always in a certain temperature field, if foil gauge sensitive grid is linear
The coefficient of expansion and the line style coefficient of expansion for constructing material are unequal, then when temperature changes, due to stretching for sensitive grid and component
Long (or compression) amount differs, and receives additional stretching (or compression) so as to cause sensitive grid, the resistance of sensitive grid can change, and make
At measurement inaccuracy, this phenomenon is temperature effect.
Foil gauge component is a kind of sensor that resistance itself changes with stress variation.Almost all of foil gauge component
2, sensitivity is all relatively low, can significantly improve its sensitivity using bridge circuit, and make to output and input in a linear relationship.
Using the variation of bridge circuit detection foil gauge component, also have the electric current passed through extremely low, the low advantage of foil gauge self-heating.
So in strain-ga(u)ge transducer application, through frequently with bridge circuit.Bridge circuit includes a quarter bridge connection type, half-bridge
Connection type and full-bridge connection type.The conducting wire of foil gauge is band 25mm contracted payment copper wire (diameter is 0.12mm~0.16mm), no
The diameter of same unit piston rod is different, and the foil gauge model of selection can also be different.That is, corresponding to according to actual needs
Become piece to be selected.
The first foil gauge group is set i.e. in gas side cylinder head outer surface application work piece group, due to working as film in 1 outer surface of cylinder head
For piece when not contacting gas side cylinder head, there are accompanying relationships for oil pressure air pressure, almost unanimously, so when cylinder head 1 due to caused by air pressure
Strain strains unanimously with the cylinder head 1 due to caused by oil pressure, and when film contact gas side cylinder head, the pressure that oil is surveyed can be straight by diaphragm
It connects and is applied on the cylinder head of gas side, therefore oil pressure in cylinder can be monitored by the first foil gauge group pasted at gas side cylinder pressure head 1.
Air pressure in cylinder is monitored by the second foil gauge group, that is, active gage group pasted at 2 baseplane of air release valve hole.
The position that foil gauge is pasted on the cylinder head of gas side is: the front of gas side cylinder head, along air-breathing valve opening and the air release valve hole center of circle
The extended line of line is pasted in the demifacet region of no air-breathing valve opening；
What the foil gauge on gas side cylinder head or oily side cylinder head was surveyed is oil pressure, and what the foil gauge of air release valve hole was surveyed is air pressure.
Further, the first foil gauge group includes the first foil gauge 3 and the second foil gauge 4, first foil gauge 3
It is arranged in a mutually vertical manner with second foil gauge 4；
The second foil gauge group includes third foil gauge 5 and the 4th foil gauge 6, the third foil gauge 5 and described the
Four foil gauges 6 are arranged in a mutually vertical manner.
Using the orthogonal active gage of two panels, these active gages are accessed into half-bridge circuit, active gage is and half-bridge circuit
A bridge arm be connected.
Further, the foil gauge component further includes third foil gauge group and the 4th foil gauge group；
The third foil gauge group is set on flange, and the flange is set on gas exhaust piping, the 4th foil gauge
Group is set on the flange.
First foil gauge is radially pasted along gas side cylinder head outer surface, and the second foil gauge is circumferentially viscous along gas side cylinder head outer surface
Patch；Third foil gauge is radially pasted along 2 baseplane of air release valve hole, and the 4th foil gauge is circumferentially pasted along 2 baseplane of air release valve hole；
In this scheme, in gas side, 1 outer surface of cylinder head is vertically arranged two panels active gage, vertically sets in 2 baseplane of air release valve hole
Two panels active gage is set, 4 compensating plates i.e. the 5th foil gauge group and the 6th foil gauge group is set on the flange of gas exhaust piping, is passed through
It pastes compensating plate and eliminates influence of the temperature of conducting wire to measurement result, compensating plate, which also can be set, here can guarantee compensation at other
Temperature and cylinder cap temperature at piece approach and not by the place of stress.
Two foil gauges are pasted respectively in two positions (2 bottom surface of 1 outer surface of cylinder head and air release valve hole), this four are work
Make piece, (because being round plate, there are circumferential and radial 2 directions for measuring the circumferential and radial strain of paste position
Strain), oil pressure and air pressure can be calculated according to strain radially and circumferentially.Active gage is pasted on cylinder body, cylinder head 1 and exhaust valve
When deformation occurs 2 bottom surface of hole, the foil gauge being attached to herein also can be therewith to stretch, therefore the resistance of active gage can change,
Resistance variations cause the output voltage of bridge circuit to change.
Further, the foil gauge component is connected with half-bridge circuit.It selects half-bridge method to construct bridge circuit, realizes and add
The output of big foil gauge and the temperature for eliminating conducting wire influence.Such as the half-bridge method in Fig. 3, active gage and temperature-compensating plate are connect respectively
Enter two adjacent bridge arms, other two bridge arm connects fixed resistance.
Further, the foil gauge component is connected with full-bridge circuit.
The method of attaching of foil gauge has an a quarter bridge, half-bridge and 3 kinds of full-bridge, rationally.A quarter bridge, half-bridge connection
2 foil gauges are only accessed, full-bridge accesses 4 foil gauges.
It further, further include photoelectric sensing unit and data acquisition unit 7, the photoelectric sensing unit includes flywheel 8,
The flywheel 8 is corresponding to photoelectric sensor 9 to be arranged, and the data acquisition unit 7 is connected with the foil gauge component, the number
It is connected according to acquisition unit 7 with the photoelectric sensor 9；The data acquisition unit 7 is connected with data processing unit 10.
The detection method of piston endstop signal is more, and Hall-type and photoelectric sensor, sensing are commonly used in Compressor Technology
The transmitting end of device is typically located on flywheel 8, and photoelectric sensor 9 generally uses reflective, the probe installation position of photoelectric sensor 9
It sets and needs to be accurately positioned, i.e., rotary flywheel 8 makes piston be respectively at interior outer dead point, and alignment probe is then transmitted point (magnet steel, iron
Block or reflective strip).
Flywheel 8 is rotated around axis vertical axis, and jiggering finds base of the piston motion to the position of top dead centre, as phase reference
Standard does a label in any position of flywheel 8 at this time, installs a light point sensor on the rack, makes its alignment mark.Just
In normal situation, photoelectric sensor 9 collects stable signal, to be marked impact signal then occur when going to photoelectric sensor 9,
It is a cycle between the continuous impact signal of every two as cycle initial position.
Photoelectric sensing unit is periodic signal in order to obtain, to judge a complete period.Photoelectricity is installed at flywheel 8
Sensor 9 determines compressor crank angle θ initial value 0 by obtained outer dead point signal；The simulation that photoelectric sensor 9 exports
Signal is converted into final required digital signal storage for subsequent analysis and processing by data acquisition unit 7.
That data acquisition is used here is strain acquirement card NI9237, NI9205 of American National instrument (NI) Co., Ltd
With acquisition cabinet cDAQ-9185, data acquisition is carried out by writing LabVIEW program.
Data processing unit is intelligent terminal.Here intelligent terminal refers to the equipment that data can be carried out with calculate analysis,
Such as computer, computer also want operation data capture program other than storing data, control the sampling and display of signal, such as
The parameters such as sample frequency and Sample preservation length are set.Data collection system realizes signal filtering, amplification, conditioning and A/D conversion
This series function.Collected 9 endstop signal of photoelectric sensor of Computer display and foil gauge circuit output voltage signal.It is aobvious
Showing can be monitored in real time.
Data acquisition unit 7 includes capture card and signal conditioning module.Data sampling frequency and corresponding acquisition are set
Channel.
Data acquisition unit 7 realizes signal filtering, amplification, and conditioning and A/D convert this series function.
The application also provides a kind of gentle pressure monitoring method of membrane compresses oil pressure, and described method includes following steps:
Step 1, building strain measurement system: according to cylinder head size selection foil gauge model, by the foil gauge chosen into
Row connects electric bridge after pasting, after photoelectric sensor then is installed at flywheel, configuration data acquisition unit；
Step 2, acquisition signal: defeated by the data acquisition unit synchronous acquisition first voltage signal and foil gauge circuit
Second voltage signal out, while the first voltage signal of acquisition is converted into the first digital signal and is stored, by acquisition
Second voltage signal is converted to the second digital signal and is stored；
Step 3, the beginning and ending time that a complete cycle is judged according to the first digital signal；
Step 4, according to the beginning and ending time of one complete cycle, second digital signal is handled, is obtained
Oil pressure value and atmospheric pressure value.
Further, carrying out processing to second digital signal in the step 4 includes:
(1) according to the voltage data measured, the strain of working strain gauge is calculated separately out:
Wherein, θ is represented crank angle (0~360 °), and ε (θ) is strain, and e (θ) is collected voltage signal, and μ is Poisson
Than E is elasticity modulus, KsFor foil gauge sensitivity coefficient；Here the strain of 4 active gages is first calculated；
(2) oil pressure is calculated:
Cylinder head is reduced to round flat plate model, the radial stress of cylinder head outer surface foil gauge is calculated according to the strain gauge measured
And circumferential stress, then according to diaphragm type compressor structure, the boundary condition for bringing the periphery fixed plate of uniform load into is counted
Calculation obtains oil pressure value；
(3) air pressure is calculated:
According to the radial stress and circumferential stress of the strain calculation exhaust valve opening baseplane measured, gas is then calculated
Pressure value.
Further, first voltage signal described in the step 1 is by filtering, amplification, conditioning and A/D conversion, conversion
It is handled at the first digital data transmission into intelligent terminal, the second voltage signal is by filtering, amplification, conditioning and A/
D conversion, is converted into the second digital data transmission and is handled into intelligent terminal.
Data acquire detailed process, and the analog signal that foil gauge and photoelectric sensor export is converted by data collection system
At final required digital signal storage into hard disc of computer for subsequent analysis and processing.
It is calculated with computer according to formula when calculating, implementation can be with software programming, be also possible to excel.
It according to collected data, is calculated using formula, what is used herein is exactly computer, writes LabVIEW journey
Sequence calculate.
Foil gauge used herein at 2 bottom surface platform of 1 surface of diaphragm type compressor gas side cylinder head and air release valve hole to answering
Change is monitored, including eight foil gauges, four active gages, four compensating plates.In gas side, 1 outer surface of cylinder head, application work are answered
Become piece Rw1 and Rw2, wherein Rw1 radially pastes, and Rw2 circumferentially pastes.At the bottom end platform of gas side cylinder head air release valve hole 2,
Application work foil gauge Rw3 and Rw4, wherein Rw3 radially pastes, and Rw4 circumferentially pastes.For compensating plate: being mended by pasting
It repays piece and eliminates influence of the temperature to measurement result, compensating plate is pasted on the flange of gas exhaust piping (or other can guarantee and mend
It repays temperature and cylinder cap temperature at piece to approach and not by the place of stress).It selects half-bridge method to construct bridge circuit, realizes to increase and answer
The output for becoming piece and the temperature for eliminating conducting wire influence.
Diaphragm type compressor oil pressure monitoring apparatus provided by the present application will by the way that foil gauge component is set to gas side cylinder head
Foil gauge component is connected with bridge circuit, improves the sensitivity of foil gauge component, and makes to output and input in a linear relationship.By
In the stickup foil gauge of the gas side cylinder head non-invasive in diaphragm type compressor, foil gauge component is set and measures the strain of gas side cylinder head,
Oil pressure and air pressure are indirectly measured, it can be with the lossless gentle pressure of security measurement membrane compresses oil pressure.This method peace
It is complete reliable, it is not damaged to diaphragm type compressor, the accurate prison of the gentle lateral pressure of oil lateral pressure can be achieved especially under the operating condition of high pressure
It surveys.
" first, second ... " in the application is intended merely to distinguish foil gauge, and structure is all the same.
Although the application is described above by referring to specific embodiment, one of ordinary skill in the art are answered
Work as understanding, in principle disclosed in the present application and range, many modifications can be made for configuration disclosed in the present application and details.
The protection scope of the application is determined by the attached claims, and claim is intended to technical characteristic in claim
Equivalent literal meaning or range whole modifications for being included.
Claims (9)
1. a kind of gentle pressure monitoring device of membrane compresses oil pressure, it is characterised in that: including cylinder and foil gauge circuit；
The cylinder includes cylinder head (1) and air release valve hole (2), and the air release valve hole (2) is set on the cylinder head (1)；
The foil gauge circuit includes foil gauge component and bridge circuit interconnected, and the foil gauge component is answered including first
Become piece group and the second foil gauge group, the first foil gauge group are set to the cylinder head (1) outer surface, the second foil gauge group
It is set to the air release valve hole (2) baseplane, the first foil gauge group is connected with the bridge circuit, second strain
Piece group is connected with the bridge circuit.
2. the gentle pressure monitoring device of membrane compresses oil pressure as described in claim 1, it is characterised in that: first foil gauge
Group includes the first foil gauge (3) and the second foil gauge (4), and first foil gauge (3) and second foil gauge (4) are mutually hung down
Straight setting；
The second foil gauge group includes third foil gauge (5) and the 4th foil gauge (6), the third foil gauge (5) with it is described
4th foil gauge (6) is arranged in a mutually vertical manner.
3. the gentle pressure monitoring device of membrane compresses oil pressure as described in claim 1, it is characterised in that: the foil gauge component
It further include third foil gauge group and the 4th foil gauge group；
The third foil gauge group is set on flange, and the flange is set on gas exhaust piping, and the 4th foil gauge group is set
It is placed on the flange.
4. the gentle pressure monitoring device of membrane compresses oil pressure as described in claim 1, it is characterised in that: the foil gauge component
It is connected with half-bridge circuit.
5. the gentle pressure monitoring device of membrane compresses oil pressure as described in claim 1, it is characterised in that: the foil gauge component
It is connected with full-bridge circuit.
6. such as the gentle pressure monitoring device of membrane compresses oil pressure according to any one of claims 1 to 5, it is characterised in that: also
Including photoelectric sensing unit and data acquisition unit (7), the photoelectric sensing unit includes flywheel (8), the flywheel (8) and light
Electric transducer (9) is accordingly arranged, and the data acquisition unit (7) is connected with the foil gauge component, and the data acquisition is single
First (7) are connected with the photoelectric sensor (9)；The data acquisition unit (7) is connected with data processing unit (10).
7. a kind of gentle pressure monitoring method of membrane compresses oil pressure, it is characterised in that: described method includes following steps:
Step 1, building strain measurement system: according to cylinder head size selection foil gauge model, the foil gauge chosen is glued
Electric bridge is connected after patch, after photoelectric sensor then is installed at flywheel, configuration data acquisition unit；
Step 2, acquisition signal: pass through the data acquisition unit synchronous acquisition first voltage signal and foil gauge circuit output
Second voltage signal, while the first voltage signal of acquisition is converted into the first digital signal and is stored, by the second of acquisition
Voltage signal is converted to the second digital signal and is stored；
Step 3, the beginning and ending time that a complete cycle is judged according to the first digital signal；
Step 4, according to the beginning and ending time of one complete cycle, second digital signal is handled, obtains oil pressure
Value and atmospheric pressure value.
8. the gentle pressure monitoring method of membrane compresses oil pressure as claimed in claim 7, it is characterised in that: right in the step 4
Second digital signal carries out processing
(1) according to the voltage data measured, the strain of working strain gauge is calculated separately out:
Wherein, θ represents crank angle, and ε (θ) is strain, and e (θ) is collected voltage signal, and μ is Poisson's ratio, and E is springform
Amount, KsFor foil gauge sensitivity coefficient；
(2) oil pressure is calculated:
Cylinder head is reduced to round flat plate model, radial stress and the week of cylinder head outer surface foil gauge are calculated according to the strain gauge measured
To stress, then according to diaphragm type compressor structure, the boundary condition for bringing the periphery fixed plate of uniform load into calculate
Oil pressure value out；
(3) air pressure is calculated:
According to the radial stress and circumferential stress of the strain calculation exhaust valve opening baseplane measured, air pressure is then calculated
Value.
9. the gentle pressure monitoring method of membrane compresses oil pressure as claimed in claim 7, it is characterised in that: institute in the step 2
First voltage signal is stated by filtering, amplification, conditioning and A/D conversion, is converted into the first digital data transmission into intelligent terminal
It is handled, the second voltage signal is converted into the second digital data transmission and arrives by filtering, amplification, conditioning and A/D conversion
It is handled in intelligent terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910615493.2A CN110374857B (en) | 2019-07-09 | 2019-07-09 | Oil pressure and air pressure monitoring device and method for diaphragm compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910615493.2A CN110374857B (en) | 2019-07-09 | 2019-07-09 | Oil pressure and air pressure monitoring device and method for diaphragm compressor |
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| CN110374857B CN110374857B (en) | 2020-08-25 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111927750A (en) * | 2020-07-14 | 2020-11-13 | 西安交通大学 | Nondestructive monitoring system and method for diaphragm of diaphragm compressor |
| CN111927751A (en) * | 2020-07-14 | 2020-11-13 | 西安交通大学 | Diaphragm displacement nondestructive monitoring system and method for diaphragm compressor |
| CN111927749A (en) * | 2020-07-14 | 2020-11-13 | 西安交通大学 | Diaphragm compressor air pressure nondestructive monitoring system and method |
| CN113007081A (en) * | 2021-04-15 | 2021-06-22 | 沈阳理工大学 | Complete balanced high-speed diaphragm compressor capable of realizing monitoring based on industrial internet platform |
| CN113153724A (en) * | 2021-04-15 | 2021-07-23 | 沈阳理工大学 | Diaphragm compressor diaphragm pulsation system fault diagnosis device based on industrial internet platform |
| US20210340974A1 (en) * | 2019-02-21 | 2021-11-04 | Xi'an Jiao Tong University | Device and method for monitoring oil pressure in oil cylinder of diaphragm compressor |
| CN114320827A (en) * | 2021-11-19 | 2022-04-12 | 西安交通大学 | Nondestructive monitoring device and method for indicator diagram of liquid-driven piston compressor |
| CN116591949A (en) * | 2023-07-18 | 2023-08-15 | 合肥通用机械研究院有限公司 | Non-invasive type air pressure monitoring device and monitoring method for high-pressure diaphragm compressor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03244873A (en) * | 1990-02-20 | 1991-10-31 | Hino Motors Ltd | Differential pressure sensor and automatic transmission |
| JP2007085319A (en) * | 2005-09-26 | 2007-04-05 | Denso Corp | Free-piston engine |
| CN104501863A (en) * | 2014-12-10 | 2015-04-08 | 西安工程大学 | Composite cross arm stress strain online monitoring system and monitoring method thereof |
| CN206399569U (en) * | 2017-01-06 | 2017-08-11 | 重庆理工大学 | A kind of torque monitoring system for united reaper |
| CN208011315U (en) * | 2017-12-31 | 2018-10-26 | 大连船舶重工集团有限公司 | Pepe monitoring system for maritime platform |
| CN109883742A (en) * | 2019-02-21 | 2019-06-14 | 西安交通大学 | A kind of diaphragm type compressor nondestructive state monitoring system and method |
| CN109973354A (en) * | 2019-02-21 | 2019-07-05 | 西安交通大学 | Air pressure monitoring device and method in a kind of reciprocating compressor non-intrusion type cylinder |
-
2019
- 2019-07-09 CN CN201910615493.2A patent/CN110374857B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03244873A (en) * | 1990-02-20 | 1991-10-31 | Hino Motors Ltd | Differential pressure sensor and automatic transmission |
| JP2007085319A (en) * | 2005-09-26 | 2007-04-05 | Denso Corp | Free-piston engine |
| CN104501863A (en) * | 2014-12-10 | 2015-04-08 | 西安工程大学 | Composite cross arm stress strain online monitoring system and monitoring method thereof |
| CN104501863B (en) * | 2014-12-10 | 2016-09-28 | 西安工程大学 | Compound cross-arm ess-strain on-line monitoring system and monitoring method thereof |
| CN206399569U (en) * | 2017-01-06 | 2017-08-11 | 重庆理工大学 | A kind of torque monitoring system for united reaper |
| CN208011315U (en) * | 2017-12-31 | 2018-10-26 | 大连船舶重工集团有限公司 | Pepe monitoring system for maritime platform |
| CN109883742A (en) * | 2019-02-21 | 2019-06-14 | 西安交通大学 | A kind of diaphragm type compressor nondestructive state monitoring system and method |
| CN109973354A (en) * | 2019-02-21 | 2019-07-05 | 西安交通大学 | Air pressure monitoring device and method in a kind of reciprocating compressor non-intrusion type cylinder |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210340974A1 (en) * | 2019-02-21 | 2021-11-04 | Xi'an Jiao Tong University | Device and method for monitoring oil pressure in oil cylinder of diaphragm compressor |
| CN111927751A (en) * | 2020-07-14 | 2020-11-13 | 西安交通大学 | Diaphragm displacement nondestructive monitoring system and method for diaphragm compressor |
| CN111927749A (en) * | 2020-07-14 | 2020-11-13 | 西安交通大学 | Diaphragm compressor air pressure nondestructive monitoring system and method |
| CN111927750A (en) * | 2020-07-14 | 2020-11-13 | 西安交通大学 | Nondestructive monitoring system and method for diaphragm of diaphragm compressor |
| CN111927751B (en) * | 2020-07-14 | 2021-07-02 | 西安交通大学 | Diaphragm displacement nondestructive monitoring system and method for diaphragm compressor |
| CN111927750B (en) * | 2020-07-14 | 2021-12-28 | 西安交通大学 | Nondestructive monitoring system and method for diaphragm of diaphragm compressor |
| CN111927749B (en) * | 2020-07-14 | 2021-08-10 | 西安交通大学 | Diaphragm compressor air pressure nondestructive monitoring system and method |
| CN113007081A (en) * | 2021-04-15 | 2021-06-22 | 沈阳理工大学 | Complete balanced high-speed diaphragm compressor capable of realizing monitoring based on industrial internet platform |
| CN113153724A (en) * | 2021-04-15 | 2021-07-23 | 沈阳理工大学 | Diaphragm compressor diaphragm pulsation system fault diagnosis device based on industrial internet platform |
| CN114320827A (en) * | 2021-11-19 | 2022-04-12 | 西安交通大学 | Nondestructive monitoring device and method for indicator diagram of liquid-driven piston compressor |
| CN114320827B (en) * | 2021-11-19 | 2022-10-25 | 西安交通大学 | Nondestructive monitoring device and method for indicator diagram of liquid-driven piston compressor |
| CN116591949A (en) * | 2023-07-18 | 2023-08-15 | 合肥通用机械研究院有限公司 | Non-invasive type air pressure monitoring device and monitoring method for high-pressure diaphragm compressor |
| CN116591949B (en) * | 2023-07-18 | 2023-10-03 | 合肥通用机械研究院有限公司 | Non-invasive type air pressure monitoring device and monitoring method for high-pressure diaphragm compressor |
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