CN103591032B - The monitoring method of a kind of vane pump flow instability degree and device - Google Patents
The monitoring method of a kind of vane pump flow instability degree and device Download PDFInfo
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- CN103591032B CN103591032B CN201310502543.9A CN201310502543A CN103591032B CN 103591032 B CN103591032 B CN 103591032B CN 201310502543 A CN201310502543 A CN 201310502543A CN 103591032 B CN103591032 B CN 103591032B
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Abstract
The monitoring method of a kind of vane pump flow instability degree and device, by measuring the instantaneous input voltage and electric current driving motor, it is calculated the transient state input power of motor, and transient state input power is normalized, then the normalized data obtained are carried out standard deviation calculating, using standard deviation as the magnitude of physical quantity weighing now thereof instability degree, it is achieved the monitoring to pump flow instability degree.Described monitoring device includes signal acquisition module, Signal-regulated kinase, signal processing module, Upper machine communication module and human-computer interaction module；Signal acquisition module is according to the requirement of the defeated acquisition parameter of human-computer interaction module, the collection of motor transient voltage x current is realized by signal acquisition module and Signal-regulated kinase, the calculating of transient power is realized by signal processing module, the normalized of transient power, the calculating of the standard deviation of normalization data, result, human-computer interaction module display result is issued by Upper machine communication module.
Description
Technical field
The present invention relates to fluid machinery method of testing field, refer in particular to the prison of a kind of vane pump flow instability degree
Survey method, and realize the device of this method.
Background technology
Vane pump, as important energy conversion and fluid delivery system, is widely used in each several part of national economy
And the sophisticated technology field such as Aero-Space.Therefore, reduce its energy consumption, improve and run security and the reliability, tool
Having huge economic benefit, to improving, China's Industry Development Level is significant.The hydraulic performance of pump is main
Refer to flow lift characteristic, efficiency characteristic etc., directly related with the energy-saving run ability of water pump.In recent years, more
Carry out the most research and show that the unstable characteristic of pump internal flow and the external characteristics of pump are close association, be to affect pump
This quality factor of external characteristics.
Affect the flow instability within pump to be mainly stator-rotor interaction, import and export backflow, cavitation and Secondary Flow
Deng, alternation axial force and radial force that the flow operating mode of these unstable characteristics produces are to cause bearing burn with close
The main cause that envelope is destroyed, these faults the most then cause stop work and production, heavy then can cause the catastrophic failures such as fire,
These are closely bound up with pump safe operation and reliability.
Unstable degree when judging the operation of pump the most timely and accurately is very important.And at present about
The documents and materials of pump internal flow instability research, mainly reflect flowing instability Producing reason, and work as
Impact on pump operation during flowing instability, but the monitoring about the unstable degree running centrifugal pump seldom goes out
Existing.
Summary of the invention
It is an object of the invention to provide the monitoring method of a kind of centrifugal pump flow instability degree, and realize
The device of this method realizes the monitoring to flowing instability degree during pump operation, to ensure that centrifugal pump can
Lean on, energy-saving run.
Technical scheme: for solving above technical problem, present invention employs following technical scheme: a kind of vane pump
The monitoring method of flow instability degree, it is characterised in that: by measuring the instantaneous input voltage driving motor
And electric current, it is calculated the transient state input power of motor, and transient state input power is normalized, the most right
The normalized data obtained carry out standard deviation calculating, using standard deviation as weighing now thereof instability degree
Magnitude of physical quantity, it is achieved the monitoring to pump flow instability degree.
A kind of monitoring device of vane pump flow instability degree, it is characterised in that: include signal acquisition module,
Signal-regulated kinase, signal processing module, Upper machine communication module and human-computer interaction module；
Signal acquisition module according to the requirement of the defeated acquisition parameter of human-computer interaction module, by signal acquisition module and
Signal-regulated kinase realizes the collection of motor transient voltage x current, realizes transient power by signal processing module
Calculating, the normalized of transient power, the calculating of the standard deviation of normalization data, by upper machine communication mould
Block issues result, human-computer interaction module display result.
Signal acquisition module includes Hall voltage sensor and Hall current sensor, pump can be driven the defeated of motor
The Dynamic Signal entering voltage x current measures.
Signal processing module is according to the three-phase voltage V of the transient state collectedΦ(t), current signal IΦ(t), according to
Following formula motor transient input power P to motortotT () calculates:
Pφ(t)=Vφ(t)*Iφ(t)
Ptot(t)=Pφa(t)+Pφb(t)+Pφc(t)
To calculated motor transient input power PtotT () is normalized by being divided by with its sliding average
Process, then to the normalized data obtained, carry out standard deviation calculating.
Beneficial effect: producing on power input to machine fluctuates accordingly realizes flowing not the present invention by quantifying
The monitoring of extent of stability, it is ensured that centrifugal pump is reliable, energy-saving run.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the monitoring device of the present invention a kind of vane pump flow instability degree.
Fig. 2 is that assembly of the invention is installed and Acquisition Circuit schematic diagram.
Fig. 3 is signal conditioning circuit figure.
Fig. 4 is signal processing flow.
Fig. 5 is for closing dead point operating mode result.
Fig. 6 is 0.5 times of optimum efficiency operating mode result.
Fig. 7 is optimum efficiency operating mode result.
Fig. 8 is 1.2 times of optimum efficiency operating mode results.
Fig. 9 is the measurement analysis result of flow and unstability index.
In Fig. 3,10 is operational amplifier.
Detailed description of the invention
The present invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings.
As it is shown in figure 1, the monitoring device of a kind of vane pump flow instability degree includes signal acquisition module,
Signal-regulated kinase, signal processing module, Upper machine communication module and human-computer interaction module.
This device is installed with on the driving motor of pump to be monitored, is connected with the supply line of motor, leads to simultaneously
Cross human-computer interaction module Input Monitor Connector time interval and circuit frequency acquisition, when water pump operation, as in figure 2 it is shown,
By being embedded in Hall voltage sensor and the Hall current sensor of PCB, pump is driven motor
The Dynamic Signal of input voltage and electric current measures, then by signal conditioning circuit as shown in Figure 3, logical
Cross operational amplifier 10 and interlock circuit thereof input signal is isolated and follows, by input signal conditioning with
Adapt to DSP Acquisition Circuit, then carry out anti-aliasing process by low pass filter, eliminate High-frequency Interference, finally
The A/D modular converter being internally integrated by DSP and data buffer zone, be timed sampling and deposit above-mentioned signal
Storage.
In the signal processing, according to the three-phase voltage V of the transient state collectedΦ(t), current signal IΦ(t), root
According to following formula motor transient input power P to motortotT () calculates:
Pφ(t)=Vφ(t)*Iφ(t)
Ptot(t)=Pφa(t)+Pφb(t)+Pφc(t)
Then in conjunction with the signal processing flow figure shown in Fig. 4, first to calculated motor transient input power
PtotT (), is normalized by being divided by with its sliding average, close dead point work as Fig. 5 Fig. 8 is respectively
Result shown in condition, 0.5 times of optimum efficiency operating mode, optimum efficiency operating mode and 1.2 times of optimum efficiency operating modes, so
The standard deviation of rear each sample of calculating, its acquired results is as shown in Figure 9.
The service data of last motor and water pump is shown by human-computer interaction module, simultaneously by upper machine communication mould
Block and host computer carry out communication.
Claims (1)
1. a monitoring device for vane pump flow instability degree, including signal acquisition module, Signal-regulated kinase, signal
Processing module, Upper machine communication module and human-computer interaction module, according to the requirement of human-computer interaction module input parameter, by letter
Number acquisition module and Signal-regulated kinase realize the collection of motor transient voltage x current, realize transient power by signal processing module
Calculating, the normalized of transient power, the calculating of normalization data standard deviation, by Upper machine communication module issue result,
Human-computer interaction module display result；Signal acquisition module includes Hall voltage sensor and Hall current sensor, can drive pump
The Dynamic Signal of the input voltage and input current of motor measures；Signal processing module is according to the three-phase voltage of the transient state collected
VΦ(t), current signal IΦ(t), transient state input power PΦ(t), according to the following formula motor transient input power P to motortot(t) carry out
Calculate:
Pφ(t)=Vφ(t)*Iφ(t)
Ptot(t)=Pφa(t)+Pφb(t)+Pφc(t)
P in above formulaΦa(t),PΦb(t),PΦcT single-phase transient state input power that () is the most corresponding；
To calculated motor transient input power PtotT () is normalized by being divided by with its sliding average, the most right
The normalized data obtained, carry out standard deviation calculating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310502543.9A CN103591032B (en) | 2013-10-23 | 2013-10-23 | The monitoring method of a kind of vane pump flow instability degree and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310502543.9A CN103591032B (en) | 2013-10-23 | 2013-10-23 | The monitoring method of a kind of vane pump flow instability degree and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103591032A CN103591032A (en) | 2014-02-19 |
| CN103591032B true CN103591032B (en) | 2016-12-07 |
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| CN201310502543.9A Expired - Fee Related CN103591032B (en) | 2013-10-23 | 2013-10-23 | The monitoring method of a kind of vane pump flow instability degree and device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104233491B (en) * | 2014-10-13 | 2016-10-26 | 太仓苏纶纺织化纤有限公司 | A kind of preparation method of porous nano-fibre |
| CN110671341A (en) * | 2019-11-04 | 2020-01-10 | 江苏科技大学 | Centrifugal pump impeller damage diagnosis method and device based on sensorless monitoring technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8177520B2 (en) * | 2004-04-09 | 2012-05-15 | Regal Beloit Epc Inc. | Controller for a motor and a method of controlling the motor |
| US8774972B2 (en) * | 2007-05-14 | 2014-07-08 | Flowserve Management Company | Intelligent pump system |
| CN201377415Y (en) * | 2009-04-14 | 2010-01-06 | 海尔海斯(西安)控制技术有限公司 | Electrical control device for high-power slurry pump testing stand |
| CN103321916A (en) * | 2013-05-14 | 2013-09-25 | 江苏大学 | Water pump working condition monitoring method and device based on DSP embedded system |
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Granted publication date: 20161207 Termination date: 20181023 |