CN105201892A - Water pump positive and negative rotation detection method - Google Patents
Water pump positive and negative rotation detection method Download PDFInfo
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- CN105201892A CN105201892A CN201510713863.8A CN201510713863A CN105201892A CN 105201892 A CN105201892 A CN 105201892A CN 201510713863 A CN201510713863 A CN 201510713863A CN 105201892 A CN105201892 A CN 105201892A
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- water pump
- control system
- programmable control
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Abstract
The invention discloses a water pump positive and negative rotation detection method which comprises a controller and a programmable control system which are connected with each other, and comprises the following steps: step one, starting a water pump to perform idle running by the controller, and at a rotating speed corresponding to the frequency of 20Hz, calculating water pump power and obtaining a first numerical valve by the programmable control system, wherein the first numerical value is the rotating power of the water pump at the moment; step two, starting the water pump to do inverted running by the controller, and at a rotating speed corresponding to the frequency of 20Hz, calculating the water pump power and obtaining a second numerical valve by the programmable control system, wherein the second numerical value is the reversing rotating power of the water pump; step three, comparing the first numerical value with the second numerical value by the programmable control system: when the first numerical value is larger than the second numerical value, the water pump is in a positive rotation state; when the first numerical value is smaller than the second numerical value, the water pump is in a negative rotation state.
Description
Technical field
The present invention relates to pump technology field, particularly a kind of water pump clockwise and anticlockwise detecting method.
Background technique
Water pump is conveying liquid or the machinery making fluid pressurization.The mechanical energy of prime mover or other external energies are transferred to liquid by it, and liquid energy is increased, and are mainly used to carry liquid.
Just transferring the working state of water pump to.And reversion can cause the mechanical seal having rotation direction to require to damage, the axle sleeve locknut having rotation direction to require, impeller lock jack panel get loose, and seriously also can damage water pump structure.Water pump reversion is by being divided into initiatively reversion and passive reversion, and initiatively reversion refers to that motor drag water pump reverses, and mainly motor wiring connects anti-ballistic causing.Passive reversion refers to that water pump dragging motor reverses, and the liquid of exit of pump pipeline blows back into import, causes water pump to reverse, thus drive motor reversion.Accordingly, need the situation detecting water pump clockwise and anticlockwise, prevent water pump from occurring reversion.
Summary of the invention
The invention provides a kind of water pump clockwise and anticlockwise detecting method, overcome the difficulty of prior art, started a kind of automatic detection, the water pump clockwise and anticlockwise detecting method that accuracy rate is high.
The invention provides a kind of water pump clockwise and anticlockwise detecting method, comprise controller and programmable control system, described controller is connected with described programmable control system, comprises the following steps:
Step one, described controller starts water pump no-load running, and under the corresponding rotating speed of 20Hz frequency, described programmable control system calculates pump power and obtains the first numerical value;
Step 2, described controller starts water pump inverted running, and under the corresponding rotating speed of 20Hz frequency, described programmable control system calculates pump power and obtains second value;
Computing module built-in in described programmable control system obtains the power data of water pump according to following formula:
P＝UxI
Wherein, U is voltage, and I is electric current;
Step 3, is compared the first numerical value and second value by described programmable control system: when the first numerical value is greater than second value, and water pump is for rotating forward; When the first numerical value is less than second value, water pump is reversion.
Preferably, in step 3, when described programmable control system judges water pump as reversion, and send stop signal to described controller, suspend pump motor by described controller.
Owing to have employed above-mentioned technology, water pump clockwise and anticlockwise detecting method of the present invention compared with prior art, water pump clockwise and anticlockwise detecting method of the present invention, adopt controller and programmable control system with the use of, controller controls water pump operation, judges that water pump is forward or reverse by programmable control system, now, continue reversion by manual or stopping water pump, avoid causing water pump to damage, effectively the service time of prolongation water pump.
The present invention is further illustrated below in conjunction with drawings and Examples.
Accompanying drawing explanation
Fig. 1 is the flow chart of water pump clockwise and anticlockwise detecting method of the present invention.
Embodiment
Specific embodiments of the invention are introduced below by Fig. 1.
As shown in Figure 1, a kind of water pump clockwise and anticlockwise detecting method, comprise controller and programmable control system, controller is connected with programmable control system, comprises the following steps:
Step one, controller starts water pump no-load running, and under the corresponding rotating speed of 20Hz frequency, programmable control system calculates pump power and obtains the first numerical value, and this first numerical value is the power of now water pump rotation;
Step 2, controller starts water pump inverted running, and under the corresponding rotating speed of 20Hz frequency, programmable control system calculates pump power and obtains second value, and this second value is the counter-rotational power of water pump;
Computing module built-in in programmable control system obtains the power data of water pump according to following formula:
P＝UxI
Wherein, U is voltage, and I is electric current;
Step 3, is compared the first numerical value and second value by programmable control system: when the first numerical value is greater than second value, and water pump is for rotating forward; When the first numerical value is less than second value, water pump is reversion.
Controller comprises PLC, microcontroller, CPU, DSP etc.
Water pump forward and reverse are changed, and for non-frequency motor, can be exchanged the wiring of A phase and B phase by contactor; For variable-frequency motor, then need the A phase of inverter to export with B phase to change.
Programmable control system obtains the information that water pump is forward or reverse, refers to the initial steer of water pump in step one.Thus, when programmable control system obtains water pump for reversion operation, manual or stopping water pump continuing reversion, avoids causing water pump to damage, effectively the service time of prolongation water pump.
Further technological scheme is, in step 3, when programmable control system judges water pump as reversion, and sends stop signal to controller, suspends pump motor by controller.
Automaticity is high, automatically stops water pump operation, effectively prevents water pump from damaging.In addition, programmable control system also can send alarm signal, and alarm signal is sent to user side etc.
Above-described embodiment is only for illustration of technological thought of the present invention and feature, its object is to enable those skilled in the art understand content of the present invention and implement according to this, only can not limit the scope of the claims of the present invention with the present embodiment to adopt, namely all equal changes of doing according to disclosed spirit or modification, still drop on the scope of the claims of the present invention.
Claims (2)
1. a water pump clockwise and anticlockwise detecting method, is characterized in that: comprise controller and programmable control system, and described controller is connected with described programmable control system, comprises the following steps:
Step one, described controller starts water pump no-load running, and under the corresponding rotating speed of 20Hz frequency, described programmable control system calculates pump power and obtains the first numerical value;
Step 2, described controller starts water pump inverted running, and under the corresponding rotating speed of 20Hz frequency, described programmable control system calculates pump power and obtains second value;
Computing module built-in in described programmable control system obtains the power data of water pump according to following formula:
P＝UxI
Wherein, U is voltage, and I is electric current;
Step 3, is compared the first numerical value and second value by described programmable control system: when the first numerical value is greater than second value, and water pump is for rotating forward; When the first numerical value is less than second value, water pump is reversion.
2. water pump clockwise and anticlockwise detecting method as claimed in claim 1, is characterized in that: in step 3, when described programmable control system judges water pump as reversion, and sends stop signal to described controller, suspends pump motor by described controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713863.8A CN105201892A (en) | 2015-10-28 | 2015-10-28 | Water pump positive and negative rotation detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510713863.8A CN105201892A (en) | 2015-10-28 | 2015-10-28 | Water pump positive and negative rotation detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105201892A true CN105201892A (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510713863.8A Pending CN105201892A (en) | 2015-10-28 | 2015-10-28 | Water pump positive and negative rotation detection method |
Country Status (1)
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| CN (1) | CN105201892A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107517032A (en) * | 2017-07-27 | 2017-12-26 | 优众新能源（深圳）股份有限公司 | The method and frequency converter of automatic identification pump motor rotation direction |
| CN108119373A (en) * | 2017-12-19 | 2018-06-05 | 深圳市英威腾电气股份有限公司 | A kind of frequency converter automatic test approach and frequency converter for water pump |
Citations (6)
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| JPH11210671A (en) * | 1998-01-22 | 1999-08-03 | Kawamoto Pump Mfg Co Ltd | Pump rotational direction detecting method |
| JP2012117371A (en) * | 2010-11-29 | 2012-06-21 | Ebara Corp | Pump device and power conversion device |
| CN102852824A (en) * | 2011-06-30 | 2013-01-02 | 深圳市钜泰泵业有限公司 | Oriented running alternating-current permanent-magnet synchronous water pump and orientation control method |
| CN202673707U (en) * | 2012-07-31 | 2013-01-16 | 湖南崇德工业科技有限公司 | Negative-rotation detecting device of electric water pumping unit |
| CN103026073A (en) * | 2011-05-27 | 2013-04-03 | 富士电机株式会社 | Water supply system |
| CN104564754A (en) * | 2013-10-12 | 2015-04-29 | 珠海格力电器股份有限公司 | Fan detection control method and system |
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2015
- 2015-10-28 CN CN201510713863.8A patent/CN105201892A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11210671A (en) * | 1998-01-22 | 1999-08-03 | Kawamoto Pump Mfg Co Ltd | Pump rotational direction detecting method |
| JP2012117371A (en) * | 2010-11-29 | 2012-06-21 | Ebara Corp | Pump device and power conversion device |
| CN103026073A (en) * | 2011-05-27 | 2013-04-03 | 富士电机株式会社 | Water supply system |
| CN102852824A (en) * | 2011-06-30 | 2013-01-02 | 深圳市钜泰泵业有限公司 | Oriented running alternating-current permanent-magnet synchronous water pump and orientation control method |
| CN202673707U (en) * | 2012-07-31 | 2013-01-16 | 湖南崇德工业科技有限公司 | Negative-rotation detecting device of electric water pumping unit |
| CN104564754A (en) * | 2013-10-12 | 2015-04-29 | 珠海格力电器股份有限公司 | Fan detection control method and system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107517032A (en) * | 2017-07-27 | 2017-12-26 | 优众新能源（深圳）股份有限公司 | The method and frequency converter of automatic identification pump motor rotation direction |
| CN107517032B (en) * | 2017-07-27 | 2020-11-03 | 优众新能源（深圳）股份有限公司 | Method for automatically identifying running direction of water pump motor and frequency converter |
| CN108119373A (en) * | 2017-12-19 | 2018-06-05 | 深圳市英威腾电气股份有限公司 | A kind of frequency converter automatic test approach and frequency converter for water pump |
| CN108119373B (en) * | 2017-12-19 | 2020-01-21 | 深圳市英威腾电气股份有限公司 | Automatic testing method for frequency converter of water pump and frequency converter |
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Application publication date: 20151230 |