CN102901598B - Device for measuring radial force of transient-state hydraulic power of centrifugal pump and measuring method thereof - Google Patents
Device for measuring radial force of transient-state hydraulic power of centrifugal pump and measuring method thereof Download PDFInfo
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- CN102901598B CN102901598B CN201210350353.5A CN201210350353A CN102901598B CN 102901598 B CN102901598 B CN 102901598B CN 201210350353 A CN201210350353 A CN 201210350353A CN 102901598 B CN102901598 B CN 102901598B
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- bearing
- radial force
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 38
- 230000007246 mechanism Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 12
- 239000011888 foil Substances 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 238000013016 damping Methods 0.000 claims description 3
- NOKUWSXLHXMAOM-UHFFFAOYSA-N hydroxy(phenyl)silicon Chemical compound O[Si]C1=CC=CC=C1 NOKUWSXLHXMAOM-UHFFFAOYSA-N 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000005056 compaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a device for measuring radial force of transient-state hydraulic power of a centrifugal pump and a measuring method thereof, and discloses a measuring device. The measuring device comprises a shell 1, a back fixed ring 2, a compaction plate 3, a tight bearing 4, a shaft cavity 5, tight bearing elastic supports 6, an operation hole 7, loosened bearing elastic supports 8, a loosened bearing 9 and a front fixed ring 10, wherein outer rings of the tight bearing 4 and the loosened bearing 9 are connected and fixed with the shell 1 of the device by four elastic supports 6 and 8 respectively; the elastic supports are distributed at intervals of 90 degrees; a longitudinal strain plate and a transverse strain plate are respectively arranged on each side; for calibration, an object of which the mass is known is placed at the front end of a pump shaft, output signals of a circuit are amplified, acquired and output in a combined mode, and data of the device in each direction are recorded. The mass of the object arranged at the front end of the pump shaft is changed and is measured for many times by using the same method, so that the calibration of the device and the conversion of a measuring value are realized.
Description
Technical field
The invention provides a kind of for measuring the measurement mechanism acting on the radial force of transient-state hydraulic power of vane rotor and measuring method that the inner UNSTEADY FLOW of centrifugal pump causes, belonging to radial force of transient-state hydraulic power inner to pump machines and the relevant technical field of induced vibration thereof.
Background technology
Pump is important energy conversion device and conveying equipment for fluid substances, and wherein centrifugal pump is most widely used.Centrifugal pump is not only applied in the industrial or agricultural fields such as oil, chemical industry, water conservancy, and is the key equipment of the high-tech sectors such as aviation, naval vessel, submarine.Centrifugal pump inevitably can produce vibration in operational process, and vibration can affect stability and the security of centrifugal pump operation, and affects service life of a machine.Pump is the key equipment of Important Project, reduce vibration as much as possible and can improve pumping set reliability of operation, and the incidence of major accident can be reduced, thus ensure personal safety, avoid national property to suffer a loss, there is important social effect and economic implications.Cause centrifugal pump to produce a lot of because have of vibration problem, except the reason of pure mechanical aspects, the cyclic load produced by the inner Complex Flows of pump is also the very important factor causing vibrating, and is more difficult to control.Flow-induced vibration phenomenon has become problem demanding prompt solution in engineering reality.Therefore, in order to can oscillating load situation suffered by Real-Time Monitoring centrifugal pump parts, effective control flow-induced vibration, improves the overall performance of pumping set and pipe system, is necessary to design a kind of experimental provision can measuring the inner radial force of transient-state hydraulic power of centrifugal pump in real time.
Through retrieval, the patent of declaring that current device for measuring radial force is relevant has: a kind of radial force measuring instrument, application number 201020297952; For measuring the measuring equipment of radial force and/or axial force, application number 01822374.5; Measure a sensor for radial force, application number 201020628728.6; A kind of radial force analyzer and lip-type packing radial force values determination method thereof, application number 201010274222.4; Dynamic measurer for oil seal radical force, application number 88217115.At present in these patents, still not for the measurement mechanism of the instantaneous radial force of centrifugal pump impeller rotor under rotation status, be not applicable to the measurement mechanism that Ordinary Centrifugal Pumps bearing block structure is installed, and the method for pump impeller radial force Measurement accuracy and conversion under not having perfect rotating coordinate system.
Summary of the invention
The object of the invention is to propose a kind of structure simple, cheap, what simultaneously high, the precision of response frequency was high can realize device centrifugal pump rotating mechanism being carried out to instantaneous radial measurement.New bearing block structure is suggested, and new measurement, calibration and conversion method are established.
The inventive system comprises device case, rear set collar, pressure strip, mandrel hold, axocoel, the support of holding property of mandrel, handle hole, loose bearing resiliency supported, loose bearing and front set collar.Wherein device case is connected with external stability end, and rear set collar is connected with device case, and pressure strip is connected with rear set collar, and mandrel holds to be fixed with housing with the resiliency supported of loose bearing and is connected, and front set collar is connected with device case.Axocoel is for installing pump shaft, and handle hole is convenient to install foil gauge and placement sensor cable.Outer race utilizes 4 elastic supporting plates and device case to be connected and fixed, elastic plate is of a size of: long 15cm, wide 5cm and thick 1cm, the material of resiliency supported is phenyl siloxane rubber, it is a kind of polymer damping material, can keep stable dynamic modulus when material generation thermal deformation, your the A hardness that continues of material is 50-70 degree.In the distribution of 90 °, radial direction resiliency supported interval, the 5cm*1cm plane of back up pad is connected with bearing and bearing seat respectively.2 foil gauges are respectively laid in each 15cm*5cm side of each elastic supporting plate, and become mutual vertical distribution, be used for measuring respectively the flexural deformation of both direction, therefore, can obtain the deflection of resiliency supported in all directions, thus it is stressed to be convenient to analysis axis bearing structure.In each resiliency supported, 4 foil gauges form wheatstone bridge metering circuits altogether, and this Circuit responce frequency is high, and can eliminate the error of temperature change and strain unit bending.In addition, the object simultaneously measured loose bearing and the mandrel place of holding radial force to utilize the measurement of a bearing to check the reliability of previous bearing place deformation measurement.
For above measurement mechanism, special calibration and radial force conversion method are suggested.Impeller and pump case are removed from this device, only remaining pump shaft is arranged on this measurement mechanism, lay the object of a known quality in the front end of pump shaft, on two bearing fixed supports the output signal of totally 8 groups of wheatstone bridge amplify, gather and array output.Then by axle and add object carrier keep motionless, measuring mechanism is measured after rotating 45 ° again, after the data of complete circumference to be collected (8 positions), change the quality of the object that pump shaft front end is installed, carry out measurement again, carry out the measurement of the different calibrating quality of many groups by that analogy altogether.Can ensure that measurement mechanism can carry out the calculating of radial force by collection signal in radial all directions like this, simultaneously because added quality is known, corresponding gravity value can be calculated, therefore the linear relationship chart of any radial direction bridge output voltage value and device force in radial can be drawn out, the calibration of implement device and the conversion of measurement and actual value.
The invention has the advantages that: the structure for centrifugal pump shaft bearing designs, test unit structure is simple, strain-ga(u)ge transducer is cheap, but precision is higher, bridge diagram response frequency is high, the measurement to Dynamic Signal can be realized, achieve under fixed coordinate system the measurement of rotary body force in radial and conversion simultaneously.
Accompanying drawing explanation
Fig. 1 is centrifugal pump Hydraulic Radial Force measurement mechanism schematic diagram.
Fig. 2 is the A-A cross section of Fig. 1
Fig. 3 is the schematic diagram that in resiliency supported, foil gauge is arranged.
In figure, 1. device case, set collar, 3. pressure strip 2., 4. mandrel holds, 5. axocoel, and 6. mandrel holds resiliency supported, 7. handle hole, 8. loose bearing resiliency supported, 9. loose bearing, set collar 10.
Fig. 4 is the sample result utilizing the method to measure single blade centrifugal pump radial force.
Embodiment
The example measured below in conjunction with the radial force utilizing this device to carry out and accompanying drawing are described in detail measurement mechanism of the present invention:
As shown in Figure 1, the present invention includes device case (1), rear set collar (2), pressure strip (3), mandrel hold (4), axocoel (5), mandrel holds resiliency supported (6), handle hole (7), loose bearing resiliency supported (8), loose bearing (9) and front set collar (10) composition.Wherein device case (1) is connected with external stability end, rear set collar (2) is connected with device case (1), pressure strip (3) is connected with rear set collar (2), mandrel holds resiliency supported (6) and loose bearing resiliency supported (8) and is fixed with housing (1) and is connected, and front set collar (10) is connected with device case (1).Axocoel (5) is for installing pump shaft, and handle hole (7) is convenient to install foil gauge and placement sensor cable.Bearing (4) (9) outer shroud utilizes 4 elastic supporting plates (6) (8) and device case (1) to be connected and fixed, elastic plate is of a size of: long 15cm, wide 5cm and thick 1cm, the material of resiliency supported is phenyl siloxane rubber, it is a kind of polymer damping material, can keep stable dynamic modulus when material generation thermal deformation, your the A hardness that continues of material is 50-70 degree.In the distribution of 90 °, radial direction resiliency supported interval, the 5cm*1cm plane of back up pad is connected with bearing and bearing seat respectively.2 foil gauges are respectively laid in each 15cm*5cm side of each elastic supporting plate, and become mutual vertical distribution, Q1 and Q2 measures axial deformation, L1 and L2 for measuring radial deformation, as shown in Figure 3.Therefore, the deflection of resiliency supported in all directions can be obtained, thus it is stressed to be convenient to analysis axis bearing structure, as shown in Figure 2.In each resiliency supported, 4 foil gauges form wheatstone bridge metering circuits altogether, and this Circuit responce frequency is high, and can eliminate the error of temperature change and strain unit bending.In addition, the object simultaneously measured loose bearing and the mandrel place of holding radial force to utilize the measurement of a bearing to check the reliability of previous bearing place deformation measurement.
Calibration and the conversion method of measuring radial force are: impeller and pump case are removed from this device, only remaining pump shaft is arranged on this measurement mechanism, lays a known quality m in the front end of pump shaft
calobject, respectively the output signal of 4 groups of wheatstone bridge on each bearing fixed support is amplified, is gathered and array output.Then by axle and add object carrier keep motionless, measurement mechanism often rotates 45 ° and carries out one-shot measurement, until gather the data of complete circumference (8 positions), can ensure that measurement mechanism can carry out the calculating of radial force by collection signal in radial all directions like this.Change the quality of the object that pump shaft front end is installed, use same procedure carries out measurement again, carries out the measurement of the different calibrating quality of many groups by that analogy altogether, simultaneously due to added quality m
calknown, can according to formula (1)
F
g＝m
calg (1)
Calculate the gravity value F for calibrating
g, therefore can draw linear relation (2) and (3) of any radial direction bridge output voltage value and bearing force in radial
F in formula
fixedand F
loosebe respectively mandrel to hold and the radial force size suffered by loose bearing, can simply by F
gconversion draws, F
reffor the reference value of power, U
fixedand U
loosebe respectively mandrel and hold the output voltage with loose bearing bridge diagram, a and b is the linear coefficient of radial force size and bridge diagram output voltage.Thus, can the calibration of implement device and the conversion of measurement electric signal and the radial force value of reality.
Claims (3)
1. a radial force of transient-state hydraulic power of centrifugal pump measurement mechanism, comprise housing (1), mandrel holds (4), loose bearing (9), axocoel (5), it is characterized in that, also comprise rear set collar (2), pressure strip (3), mandrel hold resiliency supported (6), handle hole (7), loose bearing resiliency supported (8), front set collar (10);
Outer race utilizes 4 elastic supporting plates and device case to be connected and fixed, elastic plate is of a size of long 15cm, wide 5cm and thick 1cm, the material of resiliency supported is polymer damping material phenyl siloxane rubber, can keep stable dynamic modulus when material generation thermal deformation, your the A hardness that continues of this material is 50-70 degree;
In the distribution of 90 °, radial direction resiliency supported interval, the 5cm*1cm plane of back up pad is connected with bearing and bearing seat respectively; 2 foil gauges are respectively laid in each 15cm*5cm side of each elastic supporting plate, and become mutual vertical distribution, be used for measuring respectively the flexural deformation of both direction, therefore, can obtain the deflection of resiliency supported in all directions, thus it is stressed to be convenient to analysis axis bearing structure;
In each resiliency supported, 4 foil gauges form wheatstone bridge metering circuits altogether, and this Circuit responce frequency is high, and can eliminate the error of temperature change and strain unit bending.
2. a radial force of transient-state hydraulic power of centrifugal pump measuring method, is characterized in that, is applied to radial force of transient-state hydraulic power of centrifugal pump measurement mechanism as claimed in claim 1; The object measured loose bearing and the mandrel place of holding radial force to utilize the measurement of a bearing to check the reliability of previous bearing place deformation measurement; Described method is:
The object of a known quality is laid in the front end of pump shaft, amplifies, gathers and array output respectively to the output signal of 4 groups of wheatstone bridge on each bearing fixed support;
Then by pump shaft with add object carrier and keep motionless, measurement mechanism often rotates 45 ° and carries out one-shot measurement, until gathered the data of a week, guarantee measurement mechanism can carry out the calculating of radial force by collection signal in radial all directions like this;
Change the quality of the object that pump shaft front end is installed, employing same method carries out measurement repeatedly.
3. method as claimed in claim 2, is characterized in that, also comprise: the linear relationship chart drawing out any radial direction wheatstone bridge output voltage values radial force different from suffered by measurement mechanism, realizes the calibration of measurement mechanism and the conversion of measured value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210350353.5A CN102901598B (en) | 2012-09-05 | 2012-09-05 | Device for measuring radial force of transient-state hydraulic power of centrifugal pump and measuring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210350353.5A CN102901598B (en) | 2012-09-05 | 2012-09-05 | Device for measuring radial force of transient-state hydraulic power of centrifugal pump and measuring method thereof |
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| Publication Number | Publication Date |
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| CN102901598A CN102901598A (en) | 2013-01-30 |
| CN102901598B true CN102901598B (en) | 2015-04-08 |
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| CN201210350353.5A Expired - Fee Related CN102901598B (en) | 2012-09-05 | 2012-09-05 | Device for measuring radial force of transient-state hydraulic power of centrifugal pump and measuring method thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092121B (en) * | 2015-08-11 | 2017-11-03 | 中国航空工业集团公司西安飞机设计研究所 | For the method for the radial load for measuring rigid pipe |
| CN106907336B (en) * | 2017-03-13 | 2019-04-30 | 江苏大学 | A kind of mixed-flow pump impeller instantaneous radial measuring device and method |
| CN109781325B (en) * | 2018-10-10 | 2021-11-16 | 南通大学 | Radial force measuring device and method for centrifugal pump |
| CN109580071B (en) * | 2018-11-29 | 2020-01-21 | 浙江大学 | Method for measuring excitation force of rotary driving shaft and excitation force of impeller |
| CN111927822B (en) * | 2020-07-24 | 2022-05-20 | 江苏大学 | Side runner pump blade capable of effectively reducing vibration and noise of side runner pump |
| CN115950581B (en) * | 2023-03-09 | 2023-06-30 | 中国航发四川燃气涡轮研究院 | Calibrating device and method for rotor shaft squirrel cage force measuring structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5649449A (en) * | 1995-04-25 | 1997-07-22 | Abs Pump Production Ab | Method and apparatus for determining the instantaneous operation conditions of a centrifugal pump |
| CN1354358A (en) * | 2000-11-21 | 2002-06-19 | 艾特华技术有限公司 | Control of absolute storage capacity by means of measurement of radial force |
| CN101419105A (en) * | 2008-11-26 | 2009-04-29 | 中国矿业大学 | Shaft part force measuring device |
-
2012
- 2012-09-05 CN CN201210350353.5A patent/CN102901598B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5649449A (en) * | 1995-04-25 | 1997-07-22 | Abs Pump Production Ab | Method and apparatus for determining the instantaneous operation conditions of a centrifugal pump |
| CN1354358A (en) * | 2000-11-21 | 2002-06-19 | 艾特华技术有限公司 | Control of absolute storage capacity by means of measurement of radial force |
| CN101419105A (en) * | 2008-11-26 | 2009-04-29 | 中国矿业大学 | Shaft part force measuring device |
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Application publication date: 20130130 Assignee: JIANGSU YONGYI PUMP TECHNOLOGY GROUP CO.,LTD. Assignor: Jiangsu University Contract record no.: 2016320000042 Denomination of invention: Device for measuring radial force of transient-state hydraulic power of centrifugal pump and measuring method thereof Granted publication date: 20150408 License type: Exclusive License Record date: 20160229 |
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