CN115182875A - Water pump flow algorithm, control system, storage medium and processor - Google Patents
Water pump flow algorithm, control system, storage medium and processor Download PDFInfo
- Publication number
- CN115182875A CN115182875A CN202210946836.5A CN202210946836A CN115182875A CN 115182875 A CN115182875 A CN 115182875A CN 202210946836 A CN202210946836 A CN 202210946836A CN 115182875 A CN115182875 A CN 115182875A
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- Prior art keywords
- flow
- lift
- rotating speed
- fitting
- water pump
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Classifications
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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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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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
- F04B2205/00—Fluid parameters
- F04B2205/01—Pressure before the pump inlet
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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
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
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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
- F04B2205/00—Fluid parameters
- F04B2205/07—Pressure difference over the pump
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The application relates to a water pump flow algorithm, which substitutes a relevant lift value and a rotating speed into a flow-lift fitting equation to calculate flow, wherein the flow-lift fitting equation is obtained by fitting the lift value and the flow value at the same rotating speed in background data, and the background data comprises water inlet pressure P of a test water pump 1 Water outlet pressure P2, flow Q and rotating speed n, and the lift is calculated through the pressure difference of an inlet and an outlet. The method and the device have the advantage of accurate flow test.
Description
Technical Field
The application relates to the technical field of water pump flow calculation, in particular to a water pump flow algorithm, a control system, a storage medium and a processor.
Background
Water pumps are machines that deliver or pressurize a liquid. It transfers the mechanical energy of prime mover or other external energy to liquid to increase the energy of liquid, and is mainly used to transfer liquid including water, oil, acid-base liquid, emulsion, suspoemulsion and liquid metal.
In the use of water pump, need detect the flow, the method of traditional detection flow is with flow sensor direct detection, if quality of water is not good can block up flow sensor, leads to the flow test inaccurate.
Disclosure of Invention
To overcome the defects in the prior art, one of the purposes of the present application is to provide a water pump flow algorithm, a control system, a storage medium and a processor, which have the advantage of accurate flow test.
The above object of the present application is achieved by the following technical solutions:
a flow algorithm of a water pump is characterized in that a related lift value and a related rotating speed are substituted into a flow-lift fitting equation to calculate flow, wherein the flow-lift fitting equation is obtained by fitting the lift and the flow value at the same rotating speed in background data, and the background data comprise a water inlet pressure P of a test water pump 1 Water outlet pressure P2, flow Q and rotating speed n, and the lift is calculated through the pressure difference of an inlet and an outlet.
By adopting the technical scheme, when the flow is required to be measured and calculated in use, the relevant parameters are substituted into the flow-lift fitting equation to obtain the corresponding flow, so that the flow test is accurate.
The present application may be further configured in a preferred example to: the flow-lift fitting equation has a plurality of fitting equations, and different flow-lift fitting equations correspond to fitting of lift and flow values under different rotating speed values.
By adopting the technical scheme, in use, when the flow is measured and calculated, the relevant parameters are substituted into the most suitable flow equation, so that the flow can be more accurately measured.
The present application may be further configured in a preferred example to: and if the rotating speed does not have a corresponding flow-lift fitting equation, calculating the flow through the flow-lift fitting equation closest to the rotating speed.
By adopting the technical scheme, in use, relevant data are substituted into the flow-head fitting equation closest to the current rotating speed for flow calculation, so that corresponding flow can be obtained.
The present application may be further configured in a preferred example to: if the rotating speed does not have a corresponding flow-lift fitting equation, flow calculation is carried out through two flow-lift fitting equations closest to the rotating speed to obtain flow Q * n1 And Q * n2 And Q is * n1 And Q * n2 And adding according to the corresponding weight to calculate the flow corresponding to the lift value.
By adopting the technical scheme, in use, the calculated flow is more accurate by calculating through two fitting equations and calculating the corresponding flow at the position through weighting.
The present application may be further configured in a preferred example to: the corresponding rotating speed of the two closest flow-lift fitting equations is n 1 And n 2 Weight W 1 Is calculated in a manner that
Weight W 2 Is calculated in a manner that
By adopting the technical scheme, in use, the weight is obtained by calculating the rotating speed and the corresponding rotating speeds of the two flow-lift fitting equations, so that the corresponding weight of the flow-lift fitting equation can be determined, and the flow can be calculated more accurately.
The control system comprises an acquisition module and a fitting module, wherein the acquisition module is used for acquiring the pressure P of a water inlet of a water pump 1 The fitting module is used for fitting the water inlet pressure P of the water pump 1 The water outlet pressure P2 and the rotating speed n are substituted into a flow-lift fitting equation for calculation.
By adopting the technical scheme, in use, relevant data are collected, and relevant parameters are substituted into the most suitable flow equation, so that the flow test is more accurate.
The present application may be further configured in a preferred example to: the device also comprises a comparison module, wherein the comparison module acquires the rotating speed corresponding to the flow to be measured and calculated and compares the rotating speed with the rotating speeds in the multiple flow-lift fitting equations, and if the rotating speeds are not equal, the two flow-lift fitting equations closest to the corresponding rotating speeds are adopted for weighted calculation.
By adopting the technical scheme, when the rotating speed is not corresponding, the flow to be measured and calculated is obtained by calculating two weighted flow-lift fitting equations through comparison of the rotating speeds in use.
A storage medium comprising a stored program, wherein the program executes the above-described water pump flow algorithm and/or the above-described control system.
A processor for running a program, wherein the program executes the above described water pump flow algorithm and/or the above described control system.
Detailed Description
The present application is described in further detail below.
The application discloses a water pump flow algorithm, which is used for obtaining a flow-lift fitting equation at the rotating speed by fitting a plurality of corresponding lift and flow values at the same rotating speed in background data, wherein the background data comprises water pump water inlet pressure P obtained by a test prototype 1 Water outlet pressure P2, flow Q and rotating speed n, and the lift is calculated through the pressure difference of an inlet and an outlet. Wherein, the following formula is adopted for calculating the corresponding lift through the pressure difference of the inlet and the outlet
ρ is the density of the liquid and g is the acceleration of gravity. The Q-H (flow-lift) fitting equation obtained after fitting is Q n (H)＝A n H 2 +B n H+C n . Wherein A is n 、B n And C n When the rotating speed is n, the corresponding Q-H (flow-lift) fits the coefficient in the equation.
With a certain rotating speed as an interval, different rotating speeds are obtainedFitting equation of Q-H (flow-head), Q n1 (H)＝A n1 H 2 +B n1 H+C n1 ，Q n2 (H)＝A n2 H 2 +B n2 H+C n2 …Q nx (H)＝A nx H 2 +B nx H+C nx 。
When the flow needs to be calculated, the lift value and the rotating speed corresponding to the flow to be measured are obtained, and the lift value is substituted into a Q-H (flow-lift) fitting equation at the rotating speed, so that the flow at the rotating speed can be obtained. When the Q-H (flow-lift) fitting equation corresponding to the rotating speed does not exist, according to the water pump similarity theory, in a certain rotating speed range (less than 20%), the flow ratio is equal to the rotating speed ratio, namely
Thus the flow rate Q at the speed n n Can pass through the previous gear rotating speed n 1 Flow rate of time Q n1 The calculation can also be carried out through the next gear rotating speed n 2 Flow rate value Q corresponding to time n2 And (6) performing calculation. Namely, flow calculation is carried out through two flow-lift fitting equations closest to the current rotating speed to obtain flow Q * n1 And Q * n2 Wherein, in the step (A),
and Q is * n1 And Q * n2 And adding according to the corresponding weight to calculate the flow corresponding to the current head value. Weight W 1 Is calculated in a manner that
Weight W 2 Is calculated in a manner that
Thus Q n ＝W 1 (n)×Q * n1 +W 2 (n)×Q * n2 (n 1 ≤n≤n 2 )。
The application also discloses a control system, which comprises an acquisition module and a simulation moduleThe module comprises a combination module and a comparison module, wherein the acquisition module comprises a sensor for acquiring the pressure P of the water inlet of the water pump 1 The water outlet pressure P2 and the rotating speed n, and the fitting module is used for using the fitting module to adjust the water inlet pressure P of the water pump 1 The water outlet pressure P2 and the rotating speed n are substituted into a flow-lift fitting equation for calculation. The comparison module acquires the pressure P of the water inlet of the water pump corresponding to the flow to be measured and calculated acquired by the module 1 And the water outlet pressure P2 and the rotating speed n are compared with the rotating speeds in the multiple flow-lift fitting equations, if no equal rotating speed exists, the two flow-lift fitting equations closest to the corresponding rotating speed are adopted for weighted calculation.
The application also discloses a storage medium which comprises a stored program, wherein the program executes the water pump flow algorithm and/or the control system.
The application also discloses a processor for running a program, wherein the program executes the water pump flow algorithm and/or the control system.
The implementation principle of the embodiment is as follows: by acquiring background data of a test prototype and calculating a plurality of Q-H (flow-lift) fitting equations, when the flow of the water pump needs to be detected, a flow sensor does not need to be installed, and the flow can be obtained only by substituting relevant parameters into the Q-H (flow-lift) fitting equations.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A water pump flow algorithm, characterized by: substituting the related lift value and the rotating speed into a flow-lift fitting equation to calculate the flow, wherein the flow-lift fitting equation is obtained by fitting the lift and the flow value at the same rotating speed in background data, and the background data comprises the water inlet pressure P of the test water pump 1 Water outlet pressure P2, flow Q and rotating speed n, and the lift is calculated through the pressure difference of an inlet and an outlet.
2. The water pump flow algorithm of claim 1, wherein: the flow-lift fitting equation has a plurality of fitting equations, and different flow-lift fitting equations correspond to fitting of lift and flow values under different rotating speed values.
3. A water pump flow algorithm as claimed in claim 2, wherein: and if the rotating speed does not have a corresponding flow-lift fitting equation, calculating the flow through the flow-lift fitting equation closest to the rotating speed.
4. A water pump flow algorithm as claimed in claim 3, wherein: if the rotating speed does not have a corresponding flow-lift fitting equation, flow calculation is carried out through two flow-lift fitting equations closest to the rotating speed to obtain flow Q * n1 And Q * n2 And Q is * n1 And Q * n2 And adding according to the corresponding weight to calculate the flow corresponding to the lift value.
5. The water pump flow algorithm of claim 4, wherein: the corresponding rotating speed of the two closest flow-head fitting equations is n 1 And n 2 Weight W 1 Is calculated in a manner that
Weight W 2 Is calculated in a manner that
6. A control system, characterized by: the device comprises an acquisition module and a fitting module, wherein the acquisition module is used for acquiring the pressure P of a water inlet of a water pump 1 The fitting module is used for fitting the water inlet pressure P of the water pump 1 Pressure P2 at water outlet and speed n generationAnd calculating an inlet flow-lift fitting equation.
7. A control system according to claim 6, characterized in that: the device also comprises a comparison module, wherein the comparison module acquires the rotating speed corresponding to the flow to be measured and calculated and compares the rotating speed with the rotating speeds in the multiple flow-lift fitting equations, and if the rotating speeds are not equal, the two flow-lift fitting equations closest to the corresponding rotating speeds are adopted for weighted calculation.
8. A storage medium, characterized by: the storage medium includes a stored program, wherein the program executes the water pump flow algorithm of any one of claims 1-5 and/or the control system of any one of claims 6-7.
9. A processor, characterized in that: the processor is configured to run a program, wherein the program executes the water pump flow algorithm of any one of claims 1-5 and/or the control system of any one of claims 6-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210946836.5A CN115182875A (en) | 2022-08-09 | 2022-08-09 | Water pump flow algorithm, control system, storage medium and processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210946836.5A CN115182875A (en) | 2022-08-09 | 2022-08-09 | Water pump flow algorithm, control system, storage medium and processor |
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| Publication Number | Publication Date |
|---|---|
| CN115182875A true CN115182875A (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210946836.5A Pending CN115182875A (en) | 2022-08-09 | 2022-08-09 | Water pump flow algorithm, control system, storage medium and processor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116130711A (en) * | 2022-12-07 | 2023-05-16 | 大连擎研科技有限公司 | AMESim-based fuel cell thermal management modeling simulation method |
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2022
- 2022-08-09 CN CN202210946836.5A patent/CN115182875A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116130711A (en) * | 2022-12-07 | 2023-05-16 | 大连擎研科技有限公司 | AMESim-based fuel cell thermal management modeling simulation method |
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