CN102434445A - Axial force measurement device and test method of magnetic pump under instant high temperature difference environment - Google Patents
Axial force measurement device and test method of magnetic pump under instant high temperature difference environment Download PDFInfo
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- CN102434445A CN102434445A CN2011103492790A CN201110349279A CN102434445A CN 102434445 A CN102434445 A CN 102434445A CN 2011103492790 A CN2011103492790 A CN 2011103492790A CN 201110349279 A CN201110349279 A CN 201110349279A CN 102434445 A CN102434445 A CN 102434445A
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Abstract
The invention discloses an axial force measurement device and a test method of a magnetic pump under instant high temperature difference environment, which relate to an axial force detecting device structure of the magnetic pump and belong to the technical field of sensing. The axial force measurement device of the magnetic pump under the instant high temperature difference environment comprises a stress sensor, a wiring device, a signal wire, a digital strain indicator, a thermocouple signal instrument, a temperature thermocouple and a data acquisition and data analysis module. The axial force measurement device of the magnetic pump under the instant high temperature difference environment is simple in structure, practical, capable of conveniently measuring practical axial force of the magnetic pump and adopting working conditions under the instant high temperature difference environment, high in measurement accuracy and good in generality and sealing performance. The invention further discloses a measurement method applying the axial force measurement device of the magnetic pump under the instant high temperature difference environment and used for measuring the axial force of the magnetic pump.
Description
Technical field
The present invention relates to the axial stress measuring device, particularly the structure and the principle of axial force measuring device under the magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border belong to field of sensing technologies.
Background technique
The axial force measuring device is to be basic theories with the sensory technique, utilizes strain gauge and temperature transducer, realizes a kind of new technology that the magnetic drive pump axial force is measured.In carrying out magnetic drive pump structural design and optimizing process, accurately measuring the magnetic drive pump axial force is to improve the precondition of magnetic drive pump structural design.Wherein, the accurate measurement of magnetic drive pump axial force can directly obtain the size of lack of equilibrium axial force, thereby calculate to obtain deutostoma loop traffic back q more in real time through checking, and then to optimizing the balancing axial thrust structure, improves sliding bearing and flow passage part working life.
Through the balancing axial thrust formula:
And impeller gesture lift formula:
Wherein,
In the formula: balancing axial thrust A, impeller outer circle radius R
2, the impeller hub radius R
B, the impeller ring radius R
m, impeller gesture lift H
p, seal clearance resistance coefficient ζ
m, equalizing orifice resistance coefficient ζ
B, seal clearance area of passage F
m, equalizing orifice gross area F
B, impeller outlet linear velocity u
2, impeller balance hole linear velocity u
B
The generation of magnetic drive pump 8 axial forces mainly is that pressure difference is different to be produced owing to bearing before and after the impeller 8-2 cover plate.Utilize the direct method of measurement to measure the size of magnetic drive pump 8 axial forces, pressure transducer 1 must be installed between sliding bearing housing 8-3 and the sliding bearing 8-4 when requiring to measure.Because the main feature of magnetic drive pump 8 is that sealing does not have leakage by force; Sliding bearing transmission and overcurrent cavity are connected; Pressure transducer is immersed in the high-pressure working medium of magnetic drive pump 8 when measuring; So must consider magnetic drive pump 8 sealings, the problems such as instantaneous temperature that pressure transducer 1 selfsealings property, bearing capacity and overcoming come by magnetic transmission (interior magnet rotor 8-5, separation sleeve 8-7, outer magnet rotor 8-8) the eddy current torrid zone.In existing technology; Through traditional strain gauge shown in Figure 1 (is example with the SLB-700A of HBM company type sensor); Its installation dimension is excessive, and versatility and sealing are poor, is not suitable for TRANSIENT HIGH TEMPERATURE difference test environment (the TRANSIENT HIGH TEMPERATURE difference of magnetic drive pump axial force test middle finger is generally between 30-70 ℃); And cost is higher, can't satisfy magnetic drive pump axial force test request.
Summary of the invention
The objective of the invention is to solve that the axial force measuring device that is used for magnetic drive pump can not adapt to that operating mode, the measuring accuracy in TRANSIENT HIGH TEMPERATURE difference ring border (between 30-70 ℃) is low, the problem of complex structure and versatility and sealing difference.Axial force measuring device is simple in structure, practical under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring disclosed by the invention border; The size of the actual axial force of magnetic drive pump can be measured very easily, operating mode, measuring accuracy high and the versatility and the good airproof performance in TRANSIENT HIGH TEMPERATURE difference ring border can be adapted to.The present invention also discloses the method that axial force measuring device is measured the magnetic drive pump axial force under described a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border of using.
Outstanding improvement characteristics of the present invention are: (1) is amplified output signals; According to the pressure transducer loading characteristic resistance strain gauge in the strain ring is pasted district β and be designed to thin walled structures; Its processing thickness is below 2mm; Select for use Martensitic Stain Less Steel to quench in order to improve strain ring intensity, minimizing distortion and the strain ring material that increases the service life on the other hand, resistance strain gauge is wherein pasted β both sides, district reservation processing step.Adopting seat ring, strain ring and grommet that shrink-fit structure is installed separates the stickup of the resistance strain gauge in strain ring district β, resistance strain gauge with magnetic drive pump mesohigh working medium and external environment; Resistance strain gauge in seat ring, the strain ring is pasted between district β and the grommet radial direction and is had the air clearance; Because the air thermal resistance can play certain insulation effect more greatly, and bear media end pressure by seat ring and prevent that resistance strain gauge is pasted district β thin walled structures compressive deformation in the strain ring.On seat ring, strain ring step and the sliding bearing chamber interior wall sealing configuration is set; Said sealing configuration is a radial seal groove; Improve the sealing of magnetic drive pump and the selfsealings property of pressure transducer through increasing O type circle, the convenient signaling line that links to each other with strain gauge is drawn in sliding bearing housing.Under the situation that does not change the strain transducer structure, the inside/outside diameter size of seat ring, strain ring and grommet is adjusted slightly, just can install and be applicable to other model magnetic drive pumps of this series, practiced thrift the development cost highly versatile.(2) because magnetic transmission part (interior magnet rotor, separation sleeve, the outer magnet rotor) eddy current that energy loss produced heat and the fricative heat of sliding bearing start 30-70 ℃ of back medium temperature moment rising at magnetic drive pump.Under the operating mode in this TRANSIENT HIGH TEMPERATURE difference ring border, common resistance strain gauge can't reach the purpose of eliminating temperature effect.For obtaining measurement result accurately, this measuring device adopts self-temperature compensating gage, and self-temperature compensating gage is pasted district β as the vertical each other resistance strain gauge that sticks in the strain ring of active gage and compensating plate simultaneously.Self-temperature compensating gage choose considered resistance strain gauge substrate material, resistance, sensitive grid is long, temperature self-compensation form, elasticity self compensation form and wiring sealing means; Make protective coating on the resistance strain gauge surface resistance strain gauge is played protection and fixing effect.(3) for eliminating the measurement error that the circumferencial direction unbalance stress is caused, strain bridge adopts this full-bridge series circuit of Huitong.Self-temperature compensating gage is pasted district β as the vertical each other resistance strain gauge that sticks in the strain ring of active gage and compensating plate simultaneously; The stickup direction of compensating plate is uniformly distributed with along the circumferencial direction α of strain ring; Active gage is uniformly distributed with perpendicular to the circumferencial direction α of strain ring; Active gage and compensating plate are close to, and active gage and compensating plate adopt relative paster mode and two series connection of single bridge paster mode simultaneously.Obtain measurement result accurately according to experiment resistance strain gauge typical heat curve of output and measured data of experiment analysis through data capture and data analysis module.(4) for preventing that the strain ring from making and resistance strain gauge, signaling line and thermocouple being caused damage when installing, on the strain ring, paste district β and put line district γ for signaling line and thermocouple add resistance strain gauge.Wherein resistance strain gauge stickup district β is the thin wall circular structure, and processing dimension is strict controlled in the tolerance range excessive to prevent the machining deformation amount, and the annulus outer wall surface is through polishing and chemical method processing; Put line district γ and be placed on resistance strain gauge and paste and to be deep groove structure between district β and the strain ring front end step, the groove edge chamfering, signaling line requires to be arranged in to put in the line district γ with thermocouple, and optimization has limit structure paster space.(5) increase thermocouple signal appearance and thermocouple for this experimental setup; The output signal synchronous collection of thermocouple signal appearance and thermocouple and pressure transducer; The temperature that the ring of monitoring strain in real time resistance strain gauge is pasted district β; Resistance strain gauge is pasted the next heat output influence of real time temperature elimination TRANSIENT HIGH TEMPERATURE difference band of district β during through experiments of measuring, thereby proofreaies and correct The ultimate results.The thermocouple measurement end should be as far as possible near active gage, and multiple spot is placed thermocouple and measured the heat output influence to avoid temperature gradient to cause being heated inequality to bring in resistance strain gauge is pasted district β.
Be the technological scheme that realizes that the object of the invention adopted: axial force measuring device under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border, it comprises strain gauge, termination, signaling line, digital strainometer, thermocouple signal appearance, temperature thermocouple and data capture and data analysis module; The peripheral unit magnetic drive pump comprises the pump housing, impeller, sliding bearing housing, sliding bearing, interior magnet rotor, driven shaft, separation sleeve, outer magnet rotor, intermediate support and rolling bearing assembly.Wherein, strain gauge mainly is made up of seat ring, resistance strain gauge, protective coating, grommet, sealing configuration and strain ring.Seat ring, strain ring and grommet material select for use Martensitic Stain Less Steel to quench, and the outer ring surface of strain ring is provided with step, puts line district γ and resistance strain gauge stickup district β.Resistance strain gauge is pasted district β and is designed to the thin wall circular structure, and its processing thickness is below 2mm, and processing dimension is strict controlled in the tolerance range excessive to prevent the machining deformation amount, and the annulus outer wall surface is handled through polishing and chemical method; Resistance strain gauge is pasted β both sides, district and is kept processing step, puts line district γ and is placed on resistance strain gauge and pastes and be deep groove structure, groove edge chamfering between district β and the strain ring front end step; On seat ring, strain ring step and the sliding bearing chamber interior wall sealing configuration is set, said sealing configuration is a radial seal groove.Resistance strain gauge adopts self-temperature compensating gage; Self-temperature compensating gage is simultaneously as active gage and compensating plate; Resistance strain gauge sticks on resistance strain gauge by the requirement of Hui Sitong full-bridge series circuit and pastes district β, uses polyurethane, room temperature vulcanized silicone rubber and high temperature gummed tape to make protective coating on the resistance strain gauge surface and resistance strain gauge is fixed and is protected.
The annexation of axial force measuring device is under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border: strain gauge is when test; The seat ring inwall contacts with high-pressure medium, avoids the resistance strain gauge in the direct contacting strain ring of high-pressure medium to paste district's β thin wall circular structure and produce distortion.Self-temperature compensating gage is pasted district β as the vertical each other resistance strain gauge that sticks in the strain ring of active gage and compensating plate simultaneously; The stickup direction of compensating plate is uniformly distributed with along the circumferencial direction α of strain ring; Active gage is uniformly distributed with perpendicular to the circumferencial direction α of strain ring; Active gage and compensating plate are close to spacing and are being 1-2mm,, active gage and compensating plate adopt relative paster mode and two series connection of single bridge paster mode simultaneously.Active gage subtend in twos is composed in series four arms series connection full-bridge circuit " ae " and " cg " brachium pontis, and radial direction resistance strain gauge subtend in twos is composed in series four arms series connection full-bridge circuit " bf " and " hd " brachium pontis.The air thermal resistance all is provided with the air clearance between seat ring, strain ring, grommet, sliding bearing housing and the external environment, owing to can play certain insulation effect more greatly.The thermocouple assay end is fixed on resistance strain gauge pastes β surface, district, the thermocouple measurement point is positioned at resistance strain gauge and pastes district β, as far as possible near active gage; Seat ring, strain ring and grommet fit from inside to outside are mounted to one, in sealing configuration, add O type circle; Pressure transducer is installed between sliding bearing housing and the driven shaft rear end sliding bearing, and sliding bearing is pressed on pressure transducer on the counterface of sliding bearing housing; Thereby guarantee that through control sliding bearing chamber interior wall radial seal O type groove size, fitting surface jumping degree and counterface perpendicularity sliding bearing is pressed on strain transducer on the sliding bearing housing counterface.Signaling line drawn with termination from the sliding bearing housing drilling link to each other, termination is connected on the digital strainometer; Thermocouple drawn with the thermocouple signal appearance from the sliding bearing housing drilling link to each other; Digital strainometer and thermocouple signal appearance are connected on data capture and the data analysis module.
Axial force measuring method is under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border: by axial force measuring device under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border with surveyed the magnetic drive pump connecting wiring; Pressure transducer in the axial force measuring device under described a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border is installed between sliding bearing housing and the driven shaft rear end sliding bearing; Signaling line is drawn with termination from the sliding bearing housing drilling and is linked to each other, and termination is connected on the digital strainometer; Thermocouple is drawn with the thermocouple signal appearance from the sliding bearing housing drilling and is linked to each other.In the nominative testing district digital strainometer and thermocouple signal appearance were opened preheating 20 minutes before the test, treat that reading after stable returns to zero the digital strainometer reading.Turn-on data is gathered and data analysis module; Set the test relevant parameter; And guarantee that digital strainometer is connected with data analysis module normally with data capture with the thermocouple signal appearance, and open magnetic drive pump, data capture and data analysis module extract and the reservation survey data automatically; Close magnetic drive pump after reaching setting test time (being generally more than 30 minutes), and continue to keep the measurement state 10-15 minute.Data capture and data analysis module extracted data reduction and analyze acquisition magnetic drive pump axial force value after measurement finished; Resistance strain gauge is pasted the next heat output influence of real time temperature elimination TRANSIENT HIGH TEMPERATURE difference band of district β during through experiments of measuring, thereby proofreaies and correct The ultimate results.
Beneficial effect:
1, the present invention has optimized the thermal compensation property of high temperature attitude lower magnetic force pump axial force test, can under TRANSIENT HIGH TEMPERATURE difference ring border, record the size of magnetic drive pump axial force.
2, axial force measuring device under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring of the present invention border has been optimized magnetic drive pump axial force testing sensor structure, takes into full account device versatility and fabricating cost, makes the Special Pump axial force measurement simple possible that becomes.
3, the present invention is under the situation that does not change the strain transducer structure, and the inside/outside diameter size of seat ring, strain ring and grommet is adjusted slightly, just can install and be applicable to different model magnetic drive pump, highly versatile.
Description of drawings
Fig. 1 is existing strain gauge (is example with a SLB-700A) outline drawing;
Fig. 2 is an axial force measuring device annexation under the magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border;
Fig. 3 pastes district's resistance strain gauge stickup, signaling line line and thermocouple line schematic representation for resistance strain gauge;
Fig. 4 is this bridge schematic diagram of axial force measuring device Huitong under the magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border;
Fig. 5 is axial force measuring device compressive force sensor construction figure under the magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border;
Fig. 6 is axial force measuring device pressure transducer and tested magnetic drive pump assembly relation schematic representation (is example with the CLB100-200-161 type) under the magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border;
Wherein: the 1-pressure transducer; The 1-1-seat ring; The 1-2-resistance strain gauge; The 1-3-protective coating; The 1-4-grommet; The 1-5 sealing configuration; 1-5 strain ring; α strain ring circumferencial direction; The β resistance strain gauge is pasted the district; γ puts the line district; The 2-termination; The 3-signaling line; The 4-digital strainometer; 5-thermocouple signal appearance; The 6-thermocouple; 7-data capture and data analysis module; The 8-magnetic drive pump; The 8-1-pump housing; The 8-2-impeller; The 8-3-sliding bearing housing; The 8-4-sliding bearing; Magnet rotor in the 8-5-; The 8-6-driven shaft; The 8-7-separation sleeve; The outer magnet rotor of 8-8-; The 8-9-intermediate support; The 8-10-rolling bearing assembly.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation:
Axial force measuring device under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border, it comprises strain gauge 1, termination 2, signaling line 3, digital strainometer 4, thermocouple signal appearance 5, temperature thermocouple 6 and data capture and data analysis module 7; Peripheral unit magnetic drive pump 8 comprises pump housing 8-1, impeller 8-2, sliding bearing housing 8-3, sliding bearing 8-4, interior magnet rotor 8-5, driven shaft 8-6, separation sleeve 8-7, outer magnet rotor 8-8, intermediate support 8-9 and rolling bearing assembly 8-10.Wherein, strain gauge 1 mainly is made up of seat ring 1-1, resistance strain gauge 1-2, protective coating 1-3, grommet 1-4, sealing configuration 1-5 and strain ring 1-6.Seat ring 1-1, strain ring 1-6 and grommet 1-4 material select for use Martensitic Stain Less Steel to quench, and the outer ring surface of strain ring 1-6 is provided with step, puts line district γ and resistance strain gauge stickup district β.Resistance strain gauge is pasted district β and is designed to the thin wall circular structure, and its processing thickness is below 2mm, and processing dimension is strict controlled in the tolerance range excessive to prevent the machining deformation amount, and the annulus outer wall surface is handled through polishing and chemical method; Resistance strain gauge is pasted β both sides, district and is kept processing step, puts line district γ and is placed on resistance strain gauge and pastes and be deep groove structure, groove edge chamfering between district β and the strain ring 1-6 front end step; On seat ring 1-1, strain ring 1-6 step and sliding bearing housing 8-3 inwall sealing configuration 1-5 is set, said sealing configuration 1-5 is a radial seal groove.Resistance strain gauge 1-2 adopts self-temperature compensating gage, with model be CLB100-200-161 magnetic drive pump 8 BAM120-3AA (11) the type self-compensating strain meter that the self-temperature compensating gage that uses in the pressure transducer provides as electrical measurement Co., Ltd of Air China that matches.Self-temperature compensating gage is simultaneously as active gage and compensating plate; Resistance strain gauge 1-2 sticks on resistance strain gauge by the requirement of Hui Sitong full-bridge series circuit and pastes district β, uses polyurethane, room temperature vulcanized silicone rubber and high temperature gummed tape to make protective coating 1-3 on resistance strain gauge 1-2 surface and resistance strain gauge 1-2 is fixed and protects.Strain gauge 1 is when test, and seat ring 1-1 inwall contacts with high-pressure medium, avoids the resistance strain gauge among the direct contacting strain ring of the high-pressure medium 1-6 to paste district's β thin wall circular structure and produce distortion.
The annexation of axial force measuring device is under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border: self-temperature compensating gage is pasted district β as the vertical each other resistance strain gauge that sticks among the strain ring 1-2 of active gage and compensating plate simultaneously; The stickup direction of compensating plate is uniformly distributed with along the circumferencial direction α of strain ring 1-2; Active gage is uniformly distributed with perpendicular to the circumferencial direction α of strain ring 1-2; Active gage and compensating plate are close to spacing about 1-2mm, and active gage and compensating plate adopt relative paster mode and two series connection of single bridge paster mode simultaneously.Active gage subtend in twos is composed in series four arms series connection full-bridge circuit " ae " and " cg " brachium pontis, and radial direction resistance strain gauge subtend in twos is composed in series four arms series connection full-bridge circuit " bf " and " hd " brachium pontis.The air thermal resistance all is provided with the air clearance between seat ring 1-1, strain ring 1-6, grommet 1-4, sliding bearing housing 8-3 and the external environment, owing to can play certain insulation effect more greatly.Thermocouple 7 test leads are fixed on resistance strain gauge paste β surface, district, thermocouple 6 measuring points are positioned at resistance strain gauge and paste district β, as far as possible near active gage; Seat ring 1-1, strain ring 1-6 and grommet 1-4 fit from inside to outside are mounted to one, in sealing configuration 1-5, add O type circle; Pressure transducer 1 is installed between sliding bearing housing 8-3 and the driven shaft 8-6 rear end sliding bearing 8-4, and sliding bearing 8-4 is pressed on pressure transducer 1 on the counterface of sliding bearing housing 8-3; Thereby guarantee that through control sliding bearing housing 2-4 inwall radial seal O type groove size, fitting surface jumping degree and counterface perpendicularity sliding bearing 8-4 is pressed on strain transducer 1 on the sliding bearing housing 8-3 counterface.Signaling line 3 drawn with termination 2 from sliding bearing housing 8-3 drilling link to each other, termination 2 is connected on the digital strainometer 4; Thermocouple 6 drawn with thermocouple signal appearance 5 from sliding bearing housing 8-3 drilling link to each other; Digital strainometer 4 is connected on data capture and the data analysis module 7 with thermocouple signal appearance 5.
Axial force measuring method is under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border: the pressure transducer 1 in the axial force measuring device under described a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border is installed between sliding bearing housing 8-3 and the driven shaft 8-6 rear end sliding bearing 8-4; Signaling line 3 is drawn with termination 2 from sliding bearing housing 8-3 drilling and is linked to each other, and termination 2 is connected on the digital strainometer 4; Thermocouple 6 is drawn with thermocouple signal appearance 5 from sliding bearing housing 8-3 drilling and is linked to each other.In the nominative testing district digital strainometer 4 and thermocouple signal appearance 5 were opened preheating 20 minutes before the test, treat that reading after stable returns to zero digital strainometer 4 readings.Turn-on data is gathered and data analysis module 7; Set the test relevant parameter; And guarantee that digital strainometer 4 is connected with data analysis module 7 normally with data capture with thermocouple signal appearance 5, and open magnetic drive pump 8, data capture and data analysis module 7 extract and the reservation survey data automatically; Close magnetic drive pump 8 after reaching setting test time (being generally more than 30 minutes), and continue to keep the measurement state 10-15 minute.Data capture and data analysis module 7 extracted the data reduction analyses and obtain magnetic drive pump axial force value accurately after measurement finished.
Protection domain of the present invention not only is confined to present embodiment, and present embodiment is used to explain the present invention, and all and the present invention change or modification under same principle and design condition is all within protection domain disclosed by the invention.
Claims (6)
1. axial force measuring device under the magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border, it is characterized in that: it comprises strain gauge (1), termination (2), signaling line (3), digital strainometer (4), thermocouple signal appearance (5), temperature thermocouple (6) and data capture and data analysis module (7); Peripheral unit magnetic drive pump (8) comprises the pump housing (8-1), impeller (8-2), sliding bearing housing (8-3), sliding bearing (8-4), interior magnet rotor (8-5), driven shaft (8-6), separation sleeve (8-7), outer magnet rotor (8-8), intermediate support (8-9) and rolling bearing assembly (8-10); Strain gauge (1) mainly is made up of seat ring (1-1), resistance strain gauge (1-2), protective coating (1-3), grommet (1-4), sealing configuration (1-5) and strain ring (1-6); The outer ring surface of strain ring (1-6) is provided with step, puts line district γ and resistance strain gauge stickup district β; Resistance strain gauge is pasted district β and is designed to the thin wall circular structure, and its processing thickness is below 2mm, and the annulus outer wall surface is handled through polishing and chemical method; Resistance strain gauge is pasted β both sides, district and is kept processing step, puts line district γ and is placed on resistance strain gauge to paste between district β and strain ring (1-6) the front end step be deep groove structure, the groove edge chamfering; On seat ring (1-1), strain ring (1-6) step and sliding bearing housing (8-3) inwall sealing configuration (1-5) is set; Resistance strain gauge (1-2) adopts self-temperature compensating gage; Self-temperature compensating gage is simultaneously as active gage and compensating plate; Resistance strain gauge (1-2) sticks on resistance strain gauge by the requirement of Hui Sitong full-bridge series circuit and pastes district β, makes protective coating (1-3) on resistance strain gauge (1-2) surface and resistance strain gauge (1-2) is fixed and is protected;
The annexation of axial force measuring device is that seat ring (1-1) inwall contacts with high-pressure medium under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border; Self-temperature compensating gage is pasted district β as the vertical each other resistance strain gauge that sticks in the strain ring (1-2) of active gage and compensating plate simultaneously; The stickup direction of compensating plate is uniformly distributed with along the circumferencial direction α of strain ring (1-2); Active gage is uniformly distributed with perpendicular to the circumferencial direction α of strain ring (1-2); It is 1-2mm that active gage and compensating plate are close to spacing, and active gage and compensating plate adopt relative paster mode and two series connection of single bridge paster mode simultaneously; All be provided with the air clearance between seat ring (1-1), strain ring (1-6), grommet (1-4), sliding bearing housing (8-3) and the external environment; Thermocouple (7) test lead is fixed on resistance strain gauge pastes β surface, district, thermocouple (6) measuring point is positioned at resistance strain gauge and pastes district β, as far as possible near active gage; Seat ring (1-1), strain ring (1-6) and grommet (1-4) fit from inside to outside are mounted to one, in sealing configuration (1-5), add O type circle; Pressure transducer (1) is installed between sliding bearing housing (8-3) and driven shaft (8-6) the rear end sliding bearing (8-4), and sliding bearing (8-4) is pressed on pressure transducer (1) on the counterface of sliding bearing housing (8-3); Signaling line (3) drawn with termination (2) from sliding bearing housing (8-3) drilling link to each other, termination (2) is connected on the digital strainometer (4); Thermocouple (6) drawn with thermocouple signal appearance (5) from sliding bearing housing (8-3) drilling link to each other; Digital strainometer (4) and thermocouple signal appearance (5) are connected on data capture and the data analysis module (7).
2. axial force measuring device under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring according to claim 1 border is characterized in that: multiple spot placement thermocouple (6) is measured in resistance strain gauge is pasted district β.
3. axial force measuring device under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring according to claim 1 and 2 border is characterized in that: said sealing configuration (1-5) is a radial seal groove.
4. axial force measuring device under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring according to claim 1 and 2 border is characterized in that: described seat ring (1-1), strain ring (1-6) and grommet (1-4) material select for use Martensitic Stain Less Steel to quench.
5. axial force measuring method under the magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border is characterized in that: by axial force measuring device under described a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring border with surveyed magnetic drive pump (8) connecting wiring; In the nominative testing district digital strainometer (4) and thermocouple signal appearance (5) are opened preheating before the test, treat that reading after stable returns to zero digital strainometer (4) reading; Turn-on data is gathered and data analysis module (7), sets test parameter, and guarantees that digital strainometer (4) is connected normally with data analysis module (7) with data capture with thermocouple signal appearance (5); Open magnetic drive pump (8), data capture and data analysis module (7) extract automatically and keep survey data, reach to close magnetic drive pump (8) after setting the test time, and continue maintenance measurement state 10-15 minute; Data capture and data analysis module (7) extracted data reduction and analyze acquisition magnetic drive pump axial force value after measurement finished; Resistance strain gauge is pasted the next heat output influence of real time temperature elimination TRANSIENT HIGH TEMPERATURE difference band of district β during through experiments of measuring, thereby proofreaies and correct final axial force value measurement result.
6. axial force measuring device under a kind of magnetic drive pump TRANSIENT HIGH TEMPERATURE difference ring according to claim 5 border, it is characterized in that: the described setting test time is more than 30 minutes.
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| CN105698744A (en) * | 2015-12-25 | 2016-06-22 | 中国空气动力研究与发展中心超高速空气动力研究所 | High temperature static strain gauge with compensation strain gauge |
| CN105784246A (en) * | 2016-03-05 | 2016-07-20 | 太原理工大学 | Rotary shaft axial force measuring device |
| CN105864019A (en) * | 2016-04-08 | 2016-08-17 | 华电电力科学研究院 | Accurate pump efficiency measuring method used in pump thermal performance test efficiency measurement |
| CN109281775A (en) * | 2018-09-07 | 2019-01-29 | 北京航天发射技术研究所 | A kind of verifying system of hydraulic-driven pump type media feed system |
| CN112145449A (en) * | 2020-10-08 | 2020-12-29 | 兰州理工大学 | Axial force testing device for piston type impeller of centrifugal pump |
| CN113155334A (en) * | 2021-03-22 | 2021-07-23 | 安徽理工大学 | Full-range axial force transducer |
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| CN105784246A (en) * | 2016-03-05 | 2016-07-20 | 太原理工大学 | Rotary shaft axial force measuring device |
| CN105864019A (en) * | 2016-04-08 | 2016-08-17 | 华电电力科学研究院 | Accurate pump efficiency measuring method used in pump thermal performance test efficiency measurement |
| CN105864019B (en) * | 2016-04-08 | 2018-07-24 | 华电电力科学研究院 | Pump the efficiency of pump accurate measurement method in thermal performance test efficiency measurement |
| CN109281775A (en) * | 2018-09-07 | 2019-01-29 | 北京航天发射技术研究所 | A kind of verifying system of hydraulic-driven pump type media feed system |
| CN112145449A (en) * | 2020-10-08 | 2020-12-29 | 兰州理工大学 | Axial force testing device for piston type impeller of centrifugal pump |
| CN113155334A (en) * | 2021-03-22 | 2021-07-23 | 安徽理工大学 | Full-range axial force transducer |
| CN113155334B (en) * | 2021-03-22 | 2023-11-24 | 安徽理工大学 | Full-range axial force transducer |
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