CN101203678B - Pump, method for operating the pump and pump station comprising the pump - Google Patents
Pump, method for operating the pump and pump station comprising the pump Download PDFInfo
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- CN101203678B CN101203678B CN2006800222782A CN200680022278A CN101203678B CN 101203678 B CN101203678 B CN 101203678B CN 2006800222782 A CN2006800222782 A CN 2006800222782A CN 200680022278 A CN200680022278 A CN 200680022278A CN 101203678 B CN101203678 B CN 101203678B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0077—Safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
- F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
- F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention relates to pumps comprising variable frequency drive means and methods for operating such pumps. The inventive method for operating a pump (1) comprises the steps of, obtaining values of operating parameters of the pump (1) indicating pump conditions, communicating said values of operating parameters from variable frequency drive means (2) to a control device (11) , determining if a predetermined condition is ful- filled, communicating instructions from the control device (11) to the variable frequency drive means (2), based on the fulfilment of said predetermined condition. Furthermore, a computer program product loadable into a memory of a digital computer device, including software code portions for performing the inventive method, a pump (1) , a pump system and a control device (11) for a pump are described.
Description
Technical field
The present invention relates generally to the pump field, more particularly, the present invention relates to comprise the pump of variable ratio frequency changer drive unit.In addition, the invention still further relates to a kind of method of operating this pump.Background of invention and prior art
The pump that comprises the variable ratio frequency changer drive unit, for example sewage pump, drainage pump and dehydration pump and submersible pump normally are used at application examples such as mine, the oil well of digging up mine, and in the building site, perhaps aspirate fluid in other are used.Usually, when submersible pump is worked and when disconnecting, all soaked in water in whole or in part at long time durations.
It is so-called snoring operation that pump generally can run into the problem that submersible pump particularly can run into, and the meaning is that the part that pump is drawn is that a liquid part is an air.This is because liquid level has dropped to below the needed horizontal plane of pump, causes pump to begin to draw the part air.From this time, pump no longer includes throughput, and consumed energy redundantly.Ponding is retained in mine or the oil well, and particle begins to precipitate and be accumulated in the water pipe of pump.As long as pump is in this snoring state, those particles will remain in the water pipe and cause the additional wear of impeller, suction cover, sealing gasket etc.The pump of this poor efficiency is inhaled and is caused the overall work cost of this pump significantly to increase.In addition, this snoring operation also can cause this pump motor because overheated and impaired.In some applications, in order to overcome this snoring problem, use sensor for example liquid level switch comes the interior fluid level of detecting shaft.Yet, these liquid level sensors for example can owing to fluid in object for example branch bump against and hindered or level change takes place, thereby send an error signal in this case.
The US 6481973 that authorizes Struthers discloses a kind of pumping system of the part at the problems referred to above.Even this pumping system comprises the variable ratio frequency changer drive unit, whether it has utilized another kind of controlling method to detect liquid level and has dropped to below the predeterminated level, thereby as replenishing for the liquid level switch.More accurately, this pumping system detects whether the unexpected increase of electromotor velocity or reducing suddenly of motor torque takes place.The operation of described motor is by a sensor monitoring, and this sensor is connected to the AC output connection that extends to motor from this variable ratio frequency changer drive unit.Yet this pumping system has many shortcomings.Under the slower situation of electromotor velocity increase, this system can not be identified as this variation the indication of pump dry running.In another case, whether the liquid level that this pumping system can not detect when pump startup is enough high pump operated to carry out, because can not have the unexpected increase of electromotor velocity or reducing suddenly of motor torque in this state.Thereby this pump will move considerable time and cut off the power supply owing to overheated up to it, and also there is the risk that is badly damaged in this pump.
In many application, in for example above-mentioned application, pump is worked in a dynamic environment, thus pump should be in a bigger drop/pressure range efficient operation.The drop of pump (head) uses given power corresponding to the height of pump, and the liquid that can promote specified rate is water for example, referring to Fig. 3, wherein represents a typical pump curve with line 30.When low mobile (Q), the availability of pump power can reduce.Thereby pump can have higher (increase) pump power availability, and to have lower flowing simultaneously will be an advantage.
Another recurrent problem is that intake grill and/or impeller stop up, particularly when pump is in off-position in a cycle for a long time, this mainly is because the particle in the fluid causes, this particle deposition is in intake grill and impeller and form the mud with relative thicker or tight stickiness.So just correspondingly making needs bigger pump motor starting torque so that the rotation of priming pump impeller.Usually need maximum starting torque starting this rotation, and motor must a long time in the cycle with peak torque work.This has just consumed lot of energy and worn and torn pump impeller and motor.When pump has been in off-position for a long time the time,, must manually clean pump in this case even maximum starting torque is also not enough.In addition, pump also can for example be drawn into the particle obstruction in the impeller between on-stream period.Thereby the reliability of the pump of working in this environment is lower.
Above-mentioned basis is authorized the pumping system of US 6481973 of Struthers also at this problem.Yet, even this method fault ground is devoted to judging that pump still keeps motor rotation when blocked.More accurately, if for given motor speed, detected a unacceptable high motor torque, this pumping system will reduce motor speed, increase the level that can accept motor torque simultaneously.Its objective is to obtain a kind of stronger pump that can overcome the intensity of solid matter, but the stronger pump with severe pollutant will cause the destruction for impeller, impeller base, impeller housing etc.
Another known problem that comprises the pump of conventional variable ratio frequency changer drive unit is that this variable ratio frequency changer drive unit is installed in the dry place away from the ground of pump usually.More accurately, this just needs one to extend to the long power cable of pump motor from the variable ratio frequency changer drive unit, and this can cause the serious problems of electromagnetic interference for the variable ratio frequency changer drive unit of routine.In the above-mentioned US 6481973 that authorizes Struthers, this variable ratio frequency changer drive unit is installed in the pump case, is more accurately be connected on the plate of electrode.Yet in this case, the work of variable ratio frequency changer drive unit can be subjected to the adverse effect of the heat that motor sends, and it can cause the faulty operation of variable ratio frequency changer drive unit.
Therefore need a kind of improved pump and control the improved controlling method of this pump with respect to energy consumption and pump serviceability with efficient way.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of improved pump, a kind of pumping system that comprises this pump, computer program, the control apparatus that is used for this pump, and the method for controlling this pump and pumping system with a kind of efficient way with respect to the pump performance under variation pump drop situation.
Another object of the present invention provides a kind of improved pump, a kind of pumping system that comprises this pump, and computer program is used for the control apparatus of this pump and the method for controlling this pump and pumping system with a kind of efficient way with respect to energy consumption.
Another object of the present invention provides a kind of improved pump, a kind of pumping system that comprises this pump, and computer program is used for the control apparatus of this pump and the method for controlling this pump and pumping system with a kind of efficient way with respect to the pump serviceability.
Another object of the present invention provides a kind of improved pump, a kind of pumping system that comprises this pump, and computer program is used for the control apparatus of this pump, and the method for controlling this pump and pumping system in a kind of mode that reduces the pump wearing and tearing and prolong the pump life-span.
Another object of the present invention provides a kind of improved pump, a kind of pumping system that comprises this pump, and computer program is used for the control apparatus of this pump and the method for controlling this pump and pumping system with a kind of environment efficient way.
Another object of the present invention provides a kind of improved pump, a kind of pumping system that comprises this pump, computer program is used for the control apparatus of this pump and the method for controlling this pump and pumping system with a kind of efficient way with respect to starting reliability and duration of work reliability.
According to the present invention, these and other purposes are that the method that has the improved pump of the feature that limits, the pumping system that comprises this pump, computer program by providing a kind of in independent claims, is used for the control apparatus of this pump and is used to control this pump and pumping system realizes.Define preferred embodiment in the dependent claims.
In the context of the present invention, term " pump speed " is defined as the revolution of pump in each time quantum.
According to a first aspect of the invention, a kind of method that is used to operate the pump that comprises motor and variable ratio frequency changer drive unit is provided, this variable ratio frequency changer drive unit is configured to control the work of this motor by the electricity cable that is connected to described motor and pump, the DC link that this variable ratio frequency changer drive unit comprises rectifier, phase inverter and extends between it, and this pump is operably connected to a control apparatus.The method comprising the steps of:
-obtaining the value of the pump work parameter of indication pump state by sensing device, this sensing device is comprised in the described variable ratio frequency changer drive unit and is operably connected to described DC link,
-described operating parameter values is transferred to this control apparatus from the variable ratio frequency changer drive unit,
-based on the operating parameter values of described acquisition, by this control apparatus determine whether to conform to a predetermined condition and
-based on the meeting of described predetermined condition, send instruction from this control apparatus to the variable ratio frequency changer drive unit, with work according to described this motor of pump State Control.
According to a second aspect of the invention, provide a kind of pump that is configured to according to said method work.
According to a third aspect of the invention we, computer program in a kind of storage that can be loaded into the digital calculation machine equipment is provided, comprises the software code part that is used for the method according to a first aspect of the invention of when the computer equipment merchant moves, carrying out when this computer program.
According to a forth aspect of the invention, provide a kind of pumping system that comprises pump according to a second aspect of the invention.
According to a further aspect in the invention, provide a kind of control apparatus that is used for pump according to a second aspect of the invention.
Therefore, the present invention is based on the idea that obtains the operating parameter values of pump from the variable ratio frequency changer drive unit basically continuously, this running parameter indication pump state, and be to measure in a kind of easy, cheap mode that has high accuracy simultaneously; And based on the operating parameter values of this acquisition and control this variable ratio frequency changer drive unit, wherein according to the work of described pump status adjustment motor.Thereby this pump is with a kind of efficient way work of output quantity, energy consumption and the pump serviceability when change flowing.And, owing to reduced for for example wearing and tearing of impeller and sealing gasket of pump parts, so can prolong the life-span of pump.Because all required information of this pump of control and pumping system and variable ratio frequency changer drive unit all obtain from the variable ratio frequency changer drive unit, so without any need for external sensor.
According to a preferred embodiment of the present invention, this running parameter can be: the DC link voltage of variable ratio frequency changer drive unit, and the DC link current of variable ratio frequency changer drive unit, motor speed, or the like.Can determine power of motor, motor torque or other suitable amounts by these running parameters.
In a preferred embodiment of the invention, determine dry running incident, the power of motor during for example with different motor speed and the comparison of predetermined reference value of pump based on the operating parameter values of this acquisition.If determined that power of motor is lower than this predetermined reference level, so just stops the work of this pump motor in the time cycle of predetermined length.And, through this preset time cycle and carry out identical inspection once more when conforming to a predetermined condition, restart motor when.Therefore, solved cause as mentioned above pump particularly the impeller additional wear, cause pump motor overheated and cause the snoring operational issue of unnecessary energy consumption, thereby obtain the efficient way that a kind of operation at energy consumption and serviceability comprises the pump of variable ratio frequency changer drive unit.In addition, owing to significantly reduced, thereby can prolong life-span of pump for for example wearing and tearing of impeller, sealing gasket and suction cover of pump parts.
In an alternate embodiment of the present invention, power of motor is maintained at constant substantially level.The operating parameter values of this acquisition is compared with the predetermined reference level of this running parameter,, calculate so and obtain the required motor speed of this predetermined power level if this operating parameter values is lower than this predetermined reference level; Make of the speed running of this pump with this calculating.Preferably, the speed of this calculating is compared with the predetermined maximum permission speed of this pump,, make this pump so with this predetermined top speed running if the speed of this calculating is higher than the predetermined top speed of this pump.Thereby solved the problem of the higher availability of maintenance pump power in flowing in a big way.Shown in the line among Fig. 3 32, can utilize method to make pump drop/pressure increase by 20% to 30% according to described second aspect.Thereby, will obtain to compare lower flowing and higher pump drop by increasing pump motor speed with conventional pumps.Therefore, obtained the efficient way that a kind of operation with respect to the pump performance when changing the pump drop comprises the pump of variable ratio frequency changer drive unit.
According to another embodiment of the present invention, carry out the detection whether pump stops up; If it is blocked to detect pump, antiport pump at a predetermined velocity in the time cycle of predetermined length so.Stop pump then and start with normal direction.And, repeat this antiport pump impeller, stop and changing the step of operative orientation and eliminate up to detecting blocked state.Therefore, having solved may be by particle deposition in the fluid in intake grill and impeller and forms the mud with relative thicker or firm denseness and the problem that causes intake grill and/or pump casing obstruction or obstruction.Because this pump turns round repeatedly backward and forward with repetitive mode, so can eliminate obstruction effectively.Thereby increased starting reliability.In addition, this embodiment provides a kind of operation with respect to energy consumption and serviceability to comprise the efficient way of the pump of variable ratio frequency changer drive unit, because reduced the particularly wearing and tearing of this pump impeller.In addition, can eliminate this blocked state, also can reduce the energy consumption of this pump in a kind of mode efficiently.
As those skilled in the art will recognize that the method according to this invention and preferred embodiment thereof are suitable for realizing or being embodied as a kind of computer program or computer-readable medium, preferably in the structure of the treatment device of a control apparatus or pump or pumping system.
According to reading following explanation and in conjunction with the accompanying drawings, will be better understood and limit feature of the present invention, though be structural or operating method on, with and other objects and advantages.Can clearly realize that accompanying drawing is to be used for example and illustrative purposes, be not will be as for restricted definition of the present invention.Along with following reading illustrates also that in conjunction with the accompanying drawings these and other purposes that the present invention realized and the advantage that is provided will become clear more fully.
Description of drawings
According to following only exemplary for DETAILED DESCRIPTION OF THE PREFERRED and in conjunction with the accompanying drawings, above-mentioned and other feature and advantage of the present invention will become clear.Wherein:
Fig. 1 has schematically shown an embodiment of pump in accordance with the present invention;
Fig. 2 has schematically shown an embodiment of pump in accordance with the present invention system;
Fig. 3 shows conventional pumps and the pump curve of the pump of the work according to the present invention;
Fig. 4 shows the principle of method according to an embodiment of the invention;
Fig. 5 shows the principle of method according to another embodiment of the invention;
Fig. 6 shows the principle of method according to another embodiment of the invention;
Fig. 7 has schematically shown pump in accordance with the present invention and has been used for another embodiment of the control apparatus of this pump;
Fig. 8 has schematically shown pump in accordance with the present invention and has been used for another embodiment of the control apparatus of this pump;
Fig. 9 has schematically shown another embodiment of pump in accordance with the present invention and pumping system.
The preferred embodiments of the present invention describe in detail
Below use description to the preferred embodiment of the method for operating pumps and pumping system.
At first, will first embodiment of pump in accordance with the present invention be described with reference to Fig. 1.For the purpose of example, hereinafter described embodiments of the invention are to be used for the existing submersible pump that comprises the variable ratio frequency changer drive unit.But, be easy to recognize that the present invention can also be used for the pump of other type as those skilled in the art, sewage pump for example, drainage pump, dehydration pump etc.
The submersible pump 1 of Fig. 1 comprises variable speed unit 2, is preferably the variable ratio frequency changer drive unit (VFD unit) that is connected to the power supply (not shown) that single-phase voltage for example or three-phase voltage are provided by conjunction cable 3.The pump that comprises the VFD unit in the prior art only is designed to receive about 200V to the interior power supply of the scope of about 250V, and is different therewith, and pump in accordance with the present invention 1 can receive about 90V to the interior power supply of the scope of about 250V.Thereby pump 1 of the present invention can be used to have about 110V calibration power country /region of supplying with and the country /region with about 230V calibration power supply.In addition, pump of the prior art is designed to be supplied to the electric current with 50Hz or 60Hz frequency, and this is the known standard that is used for the different regions of a country variant and/or a country.Yet pump of the present invention is designed to many different countries, and promptly incoming frequency can be at least in the scope of 50-60Hz, and still in fact, pump of the present invention can be handled any usable frequency.Therefore, a given pump can be used to be connected to many different power supplys, and promptly given pump is the global available pump that will devote oneself to work.
It is important that VFD unit 2 is configured to and motor 9 thermoscreens, be arranged on simultaneously one with the heat conducting device of the fluid that is aspirated in, thereby make the temperature of VFD unit 2 remain on reduced levels during operation, this has just eliminated error source.
Referring now to Fig. 2, an alternate embodiment of the present invention will be described.In this embodiment, control apparatus 11 is configured to be connected with operator unit 22 by the interface unit (not shown), operator unit 22 comprises the input device of keyboard 24 forms, it allows the operator to import for example control command, and display unit or screen 26, be used to provide and pump operated relevant information, for example status information of the time history of running parameter or pump.In one embodiment, operator unit 22 is personal computers.Communication linkage between pump 1 and the operator unit 22 can be wireless link or rigid line link.In addition, operator unit 22 can correspondingly be connected to for example internet of communication network.By operator unit 22, the operator can be by the operation of display device 26 monitors pump and the different operating parameter relevant with operation.According to another embodiment, display device is the touch-sensitive screen, in this case, can a plurality of soft keys (soft-keys) be set so that provide different orders on the different interfaces that provide on the display device 26 on the screen.In addition, the operator unit can comprise the storage device (not shown), and this storage device correspondingly comprises for example ROM (read-only memory) (ROM) of random-access memory (ram) and/or nonvolatile memory.As it will be recognized by those skilled in the art that storage device can comprise the various physical equipments that are used for interim and/or permanent storage data, comprise solid-state, magnetic, photosynthetic combined equipment.For example, memory device can use one or more physical equipments to implement, for example DRAM, PROMS, EPROMS, EEPROMS, flash memory etc.
The service data of pump 1 is running parameter for example, as working time, beginning number of times, energy consumption and data with alert and service log, and can be obtained and be stored in the log file in the storage device 13.This log file can offer the operator by operator unit 22.And this log file can be downloaded in the operator unit 22 and be used for for example storing.
Certainly, control apparatus 11 has a plurality of designs that can expect, and for example this control apparatus can be realized by processor, comprises the programmable instructions that is used to carry out the method according to this invention in this processor.According to another embodiment, this control apparatus is to implement with the form of data mediums such as microchip, comprising the software of described function above being suitable for carrying out and hereinafter.In addition, alternate embodiment of the present invention has been shown in Fig. 7-9.Use identical reference number to come similar parts and/or equipment among presentation graphs 1,2 and the 7-9.In Fig. 7, control apparatus 11 is sealed in the hermetically sealed enclosure, and is set on the outer surface of pump casing.Control apparatus 11 can adhere in many ways or be fixed on this shell.For example, equipment 11 can pass through screw.In Fig. 8, control apparatus 11 is to have adopted the form that is suitable for being inserted in the bound cell in the control apparatus receiving element 15.In Fig. 9, control apparatus 11 is set on the control panel 22.
Referring now to Fig. 4, will the General Principle of the method that is used for operating pumps according to a first aspect of the invention be described.Handled snoring operational issue or dry running operational issue according to a first aspect of the invention, as mentioned above its cause the pump parts for example the wearing and tearing of impeller and sealing gasket increase, can cause pump motor overheated and cause unnecessary energy consumption.In addition, pump motor is designed to provide optimal performance when they aspirate and work in liquid, thereby the dry running that prolongs operation can destroy pump motor.Therefore, a first aspect of the present invention provides the mode of the pump 1 that a kind of efficient operation comprises VFD unit 2, as any is described with respect to energy consumption, pump life-span and serviceability among reference Fig. 1-2 and the 7-9.
At first, in step 40, the operation of initialization pump, promptly priming pump 1.In step 42 and 44, judge whether to conform to a predetermined condition then.For example, in step 42, pump in a predetermined period of time with first velocity level work, and in a predetermined period of time with the second speed horizontal operation.Preferably, described first velocity level and described second speed level are the low speed levels.For each velocity level, determine the power of motor 9, then in step 44, use these two velocity levels and verify by each power that obtains wherein whether the speed of motor 9 and the relation between the power of motor are approximately cubic function (if the cube of this power of motor and motor speed is proportional).If this relation is a cubic function, this pump 1 can turn round in normal running so, if this relation is not three relations, so just represents pump 1 suction air, and judges that liquid level is too low, and pump can not be with velocity level's operation of expection.This judgement is for example carried out in the treatment device 12 in control apparatus 11.Should be pointed out that the relation between this velocity level and the gained power must not be a cube, for other fluid mixtures liquids and gases for example, other indexes also are fit to.
In step 44, if judge that liquid level is not enough, this algorithm proceeds to step 46, and here, control apparatus 11 sends the work of instruction with stop/pause pump in a predetermined period of time to VFD unit 2, and for example perhaps a few minutes are about 2 minutes.When this time cycle finished, this algorithm returned step 42.
On the other hand, if judge that in step 44 liquid level is enough, this algorithm proceeds to step 48, and the speed with pump 1 is increased to goal pace here.Thereby pump can be with normal mode work now.
For fear of snoring operation, verify pump 1 suction air not during operation basically continuously.Therefore, in step 50, by judging whether that meeting second predetermined condition checks liquid level whether still enough, i.e. pump 1 part or mainly draw air or pumping liquid whether.This is to carry out on continuous substantially basis.In order to carry out this check, by the suitable operating parameter values of sensing device 16 acquisitions of VFD unit 2, this value is transferred to control apparatus 11.For example, can directly use DC link voltage, DC link current etc., perhaps can use it to determine the torque of motor 9 for example or the power of motor 9 preferably.Motor 9 power during operation descends suddenly and represents pump 1 suction air rather than liquid.
For example, second condition is the power of for example motor 9 and is stored in comparison between the predetermined reference level in the storage device 13, if the power of this motor is lower than this predetermined reference level, just judge that liquid level is too low.Preferably, this predeterminated level can be used for motor 9 present speeds the motor peak output about 70%.Alternatively, can be termly between step 48 and step 50, carry out and the comparable step of step 42, current to judge liquid whether in the ingress of pump 1.
If judge enough at the liquid level at pump intake place, promptly the power of motor 9 is higher than this predeterminated level, and algorithm returns step 48 so.On the other hand, if judgement is too low at the liquid level at pump intake place, promptly the power of this motor is lower than this predeterminated level, and so instead, algorithm proceeds to step 52, stops the work of this pump.Then, algorithm proceeds to step 46, continues to stop the work of pump in the cycle at a preset time.After this pause period finished, algorithm proceeded to step 42.
Referring now to Fig. 5, with the General Principle of description according to the method for the operating pumps of second aspect present invention.The second aspect of the method according to this invention has solved in the problem that on the bigger flow range pump power is maintained on the substantially invariable level.Shown in the line among Fig. 3 32, can make pump drop/pressure increase by 20% to 30% by the method according to this invention.With respect to the pump drop that changes this pump power is maintained substantially invariable level by regulating motor speed.Because the work of pump when low flowing is more efficient, can use littler pump to aspirate the liquid of specified rate, and can reduce the wearing and tearing of pump.Pump of the present invention is one and is designed to have the blanket pump that changes the many different application that require.For the pump drop of given pump and variation, can obtain higher pump performance by regulating motor speed.Thereby it is a kind of with respect to energy consumption and serviceability and operation efficiently as with reference to the mode of the pump of any the described VFD of comprising unit 2 among Fig. 1-2 and the 7-9 that a second aspect of the present invention provides.
At first, in step 60, the operation of initialization pump, promptly priming pump 1.Then in step 62, level running pump at a predetermined velocity.Substantially continuously the value that obtains corresponding to this running parameter of the running parameter of monitors pump and the sensing device by VFD unit 2 16 is transferred to control apparatus 11 with this value.For example, can directly use DC link voltage, DC link current etc., perhaps can use it to determine the torque of motor 9 for example or the power of motor 9 preferably.In step 64, in control apparatus 11, with the power of for example motor 9 and be stored in the storage device 13 of treatment device 12 for example predetermined reference level for example the rated power of motor 9 compare.If in step 64, the power of this motor is lower than this predetermined reference level, and algorithm returns step 62, and the work of pump is remained on described predetermined velocity level.On the other hand, be lower than this predeterminated level if judge the power of motor level, algorithm proceeds to step 66, wherein calculates the required speed of motor predetermined power level that arrives in treatment device 12.
Then, in step 68, the speed and the default top speed of this calculating are thought comparison.Be higher than this default top speed if find the speed of this calculating, algorithm proceeds to step 70, thus at this moment control apparatus 11 to VFD unit 2 transfer instructions with this default top speed operated motor 9, and algorithm returns step 64.Be lower than default top speed if find the speed of this calculating, then algorithm proceeds to step 72, thereby control apparatus 11 is to the speed operated motor 9 of VFD unit 2 transfer instructions with this calculating.Then, algorithm proceeds to this process of step 64 continuation.By power of motor being remained on substantially invariable level, increase drop/pressure in the time of can being shown in low flowing as the line among Fig. 3 32.
Forward Fig. 6 now to, with the General Principle of description according to the method for the operating pumps of third aspect present invention.The third aspect of the method according to this invention has solved the intake grill of pump 1 and/or impeller blocks or blocking problem, this be owing to the particle deposition in this fluid in intake grill and impeller and formed mud and cause with relative thickness or solid denseness.Therefore, need pump motor to have of the rotation of bigger starting torque with the primer pump impeller.This has just consumed lot of energy, and pump impeller and motor are caused wearing and tearing.When pump is in the off-position longer cycle, even maximum starting torque is not enough yet, in this case, need artificial wash pump, therefore the priming of pump reliability of working in this environment is lower.Therefore, a third aspect of the present invention provides a kind of mode of the pump of arbitrary described VFD of comprising unit 2 with respect to energy consumption, serviceability and starting reliability and among efficient operation such as reference Fig. 1-2 and the 7-9.
At first, in step 80, the operation of initialization pump, promptly priming pump 1.Then in step 82, level running pump at a predetermined velocity.Then, in step 84, whether the check pump blocks/stops up.This can be the example of carrying out with following dual mode.A kind of mode is for example to measure the running parameter of pump and it is compared with for example predetermined reference level, for example determine motor 9 power and with its with the predetermined reference level of the power of motor 9 for example the rated power of motor 9 compare.If the power of motor of this measurement is higher than this predetermined reference level, it is exactly the indication of an obstruction/blocked state so.The second way is the alarm function that monitors variable ratio frequency changer drive unit 2, and will indicate the indication of the alarm of DC link overcurrent as obstruction/blocked state.
If in step 84, judge that pump 1 does not block, this algorithm returns step 82, wherein the work of holding pump 1.On the other hand, get clogged if judge pump 1, then algorithm proceeds to step 86, at this moment control apparatus 11 to VFD unit 2 transfer instructions in case in a predetermined period of time with first velocity reversal's drives impeller.After this predetermined period of time, stop pump 1, and then turn round with the forward direction sense of rotation.Preferably, this circulation continues about 1-10 second.Then, in step 88, check this blocked state whether to eliminate, as above-mentioned performed in step 84.If no, then this process is returned step 86.Repeat this circulation up to eliminating this blocked state.If eliminated this blocked state, algorithm returns step 82 so.
In order to prevent that pump 1 from blocking in normal work period, can regularly carry out following process:, the described cycle after, stop pump 1 and on its normal sense of rotation, turn round pump 1 having in the time cycle of predetermined length antiport pump 1 at a predetermined velocity.Thereby can further improve the functional reliability of pump.
Referring now to Fig. 3.The flow of fluid that reference number 30 and 32 timberlines are particular pump 1 and the example of drop ratio, this pump 1 is provided 3 phase voltages with 60Hz frequency from VFD unit 2.60Hz is some national standard mains frequency, but also can correspondingly increase this level by VFD unit 2, for example reach 150Hz, make described line 30,32 plotted curve of slip chart 3 upwards more or lessly and the application and the condition that a particular pump can be used for changing very much like this.
Of the present invention may the modification
Though here in order to illustrate and show and described certain embodiments with the purpose of example, but one of ordinary skill in the art will appreciate that, do not depart from the scope of the present invention with described specific embodiment shown in can replacing with a large amount of alternative and/or equivalent mode of executions.Those skilled in the art are easy to recognize that the present invention can implement with a large amount of mode of executions, comprises hardware and software mode of execution or its combination.For example, can obtain and carry out above-mentioned many functions by the suitable software that is included on microchip or the similar data medium.This application will cover any modification and the change of preferred embodiment described here.Therefore, the present invention is that statement by claims and equivalent thereof limits.
Claims (31)
1. one kind is used for the method that operation comprises the pump (1) of motor (9) and variable ratio frequency changer drive unit (2), this variable ratio frequency changer drive unit (2) is configured to control the work of this motor (9) by the electricity cable that is connected to described motor (9) and pump (1), this variable ratio frequency changer drive unit (2) comprises rectifier (5), phase inverter (7) and the DC link (10) of extending between rectifier (5), phase inverter (7), and this pump (1) is operably connected to a control apparatus (11), the method is characterized in that to comprise step:
-obtaining the operating parameter values of the pump (1) of indication pump state by sensing device (16), this sensing device (16) is used as parts and is included in the described variable ratio frequency changer drive unit (2) and is operably connected to described DC link (10),
-described operating parameter values is transferred to this control apparatus (11) from variable ratio frequency changer drive unit (2),
-based on the operating parameter values of described acquisition, by this control apparatus (11) determine whether to conform to a predetermined condition and
-based on the meeting of described predetermined condition, send instruction from this control apparatus (11) to variable ratio frequency changer drive unit (2), with work according to described this motor of pump State Control (9).
2. the method for claim 1, wherein the step of the operating parameter values of this acquisition pump (1) comprises step:
The value of at least one in the following running parameter of-acquisition: DC link voltage level, DC link current level, the torque of motor (9), the perhaps power of motor (9).
3. method as claimed in claim 1 or 2 also comprises step:
-detect specific pump state by using described at least one running parameter.
4. method as claimed in claim 3, wherein said pump state exists relevant with the liquid of pump (1) ingress.
5. method as claimed in claim 4, wherein this judges whether that the step that conforms to a predetermined condition comprises step:
-in a predetermined period of time with first velocity level pump (1) that turns round,
-in a predetermined period of time with second speed level running pump (1) and
-based on the operating parameter values that sensing device (16) is obtained for this first velocity level and second speed level respectively, whether the power of judging motor (9) is proportional with the cube of the speed of motor (9).
6. method as claimed in claim 5 wherein from the instruction that control apparatus (11) is transferred to variable ratio frequency changer drive unit (2) is:
If-judge to conform to a predetermined condition, then with the velocity level of the expection pump (1) that turns round; Or
If-judge not meet predetermined condition, then in a predetermined period of time, stop the work of pump (1).
7. method as claimed in claim 6 also comprises step: if this pump (1) is the velocity level's running with this expection,
-check exists at the liquid of pump (1) ingress,
-obtain the operating parameter values of this pump (1) by sensing device (16),
-this described operating parameter values is transferred to this control apparatus (11) from this variable ratio frequency changer drive unit (2),
-by this control apparatus (11) based on the operating parameter values of described acquisition judge whether to meet second predetermined condition and
-based on the meeting of described second predetermined condition, from this control apparatus (11) to this variable ratio frequency changer drive unit (2) transfer instruction to control the work of this motor (9).
8. method as claimed in claim 7, wherein this judges whether that the step that meets second predetermined condition comprises step:
-the operating parameter values that will obtain is compared with a predetermined reference level.
9. method as claimed in claim 8 wherein from the instruction that control apparatus (11) is transferred to variable ratio frequency changer drive unit (2) is:
If-judge to meet this second predetermined condition, then with the velocity level of this expection pump (1) that turns round; Or
If-judge not meet this second predetermined condition, then in a predetermined period of time, stop the work of pump (1).
10. method as claimed in claim 2 also comprises step:
-at least one operating parameter values is remained on substantially invariable level.
11. method as claimed in claim 10 judges whether that wherein the step that conforms to a predetermined condition comprises:
-with velocity level's pump (1) that turns round of expection,
-based on the performance number of this sensing device (16), judge whether the power of this motor (9) is lower than the predetermined reference level of the power of this motor (9) at this motor (9) of this goal pace level acquisition.
12. method as claimed in claim 11 wherein from the instruction that control apparatus (11) is transferred to variable ratio frequency changer drive unit (2) is:
If-judge not meet predetermined condition, then with the velocity level of the expection pump (1) that turns round; Or
If-judge to conform to a predetermined condition, then calculate required motor (9) speed of predetermined reference level of the power that arrives this motor (9),
-with the speed of described calculating this pump (1) that turns round.
13. method as claimed in claim 12 also comprises step: if this pump (1) is the speed running with this calculating, then:
The default top speed of-pump (1) speed that will calculate and this pump (1) relatively and
If the speed of-this calculating is lower than this default top speed, then with the speed of described calculating this pump (1) that turns round, or
If the speed of-this calculating is higher than this default top speed, then with described default top speed this pump (1) that turns round.
14. method as claimed in claim 3, wherein said pump state is relevant with the obstruction of this pump (1).
15. method as claimed in claim 14 judges whether that wherein the step that conforms to a predetermined condition comprises:
-with velocity level's pump (1) that turns round of expection,
-based on the performance number of this sensing device (16), judge whether the power of this motor (9) is higher than the predetermined reference level of the power of this motor (9) at this motor (9) of this goal pace level acquisition.
16. method as claimed in claim 15 wherein from the instruction that control apparatus (11) is transferred to variable ratio frequency changer drive unit (2) is:
If-judge not meet predetermined condition, then with the velocity level of the expection pump (1) that turns round; Or
-with predetermined speed at preset time antiport pump (1) in the cycle; With
If-judge to conform to a predetermined condition, then after the predetermined period of time of described reverse operation, with the velocity level of this expection pump (1) that on the proper functioning direction, turns round.
17. method as claimed in claim 16 also comprises step:
If the power of-this motor (9) is higher than the predetermined reference level of the power of this motor (9), then repeat described determining step and
-repeat step as claimed in claim 16.
18. method as claimed in claim 14 is wherein regularly carried out following steps at the duration of work of this pump (1):
-with predetermined speed at preset time antiport pump (1) in the cycle; With
-after the predetermined period of time of described reverse operation, with velocity level's pump (1) that on the proper functioning direction, turns round of expection.
19. can be loaded into the computer program (14) in the storage (13) of digital calculation machine equipment, comprise the software code part of the method that when described computer program (14) moves enforcement of rights one of requires among the 1-18 on described digital calculation machine equipment.
20. pump (1) that comprises motor (9) and variable ratio frequency changer drive unit (2), this variable ratio frequency changer drive unit (2) is configured to control the work of this motor (9) by the electricity cable that is connected to described motor (9) and pump (1), this variable ratio frequency changer drive unit (2) comprises rectifier (5), phase inverter (7) and in rectifier (5), the DC link (10) of extending between the phase inverter (7), and this pump (1) is operably connected to control apparatus (11), it is characterized in that, sensing device (16) is used as parts and is included in the described variable ratio frequency changer drive unit (2), this sensing device (16) is operably connected to described DC link (10) and is configured to obtain to indicate the operating parameter values of the pump (1) of pump state, this variable ratio frequency changer drive unit (2) is configured to described operating parameter values is transferred to this control apparatus (11), and this control apparatus (11) is configured to judge whether to conform to a predetermined condition based on the operating parameter values of described acquisition, and based on meeting of described predetermined condition to this variable ratio frequency changer drive unit (2) transfer instruction, with work according to described this motor of pump State Control (9).
21. pump as claimed in claim 20, wherein said control apparatus (11) are suitable for obtaining in the following running parameter value of at least one: DC link voltage level, DC link current level, the torque of motor (9), the perhaps power of motor (9).
22. pump as claimed in claim 21, wherein said control apparatus (11) is suitable for:
-in a predetermined period of time with first velocity level pump (1) that turns round,
-in a predetermined period of time with second speed level running pump (1) and
-based on the operating parameter values that sensing device (16) is obtained for this first velocity level and second speed level respectively, whether the power of judging motor (9) is proportional with the cube of the speed of motor (9).
23. pump as claimed in claim 22, wherein said control apparatus (11) is suitable for:
If-judge to conform to a predetermined condition, then with the velocity level of the expection pump (1) that turns round; Or
If-judge not meet predetermined condition, then in a predetermined period of time, stop the work of pump (1).
24. pump as claimed in claim 21, wherein this control apparatus (11) is suitable for:
-at least one operating parameter values is remained on substantially invariable level.
25. pump as claimed in claim 24, wherein this control apparatus (11) is suitable for:
-with velocity level's pump (1) that turns round of expection,
-based on the performance number of this sensing device (16), judge whether the power of this motor (9) is lower than the predetermined reference level of the power of this motor (9) at this motor (9) of this goal pace level acquisition.
26. as claim 24 or 25 described pumps, wherein this control apparatus (11) is suitable for:
If-judge not meet predetermined condition, then with the velocity level of the expection pump (1) that turns round; Or
If-judge to conform to a predetermined condition, then calculate required motor (9) speed of predetermined reference level of the power that arrives this motor (9),
-with the speed of described calculating this pump (1) that turns round.
27. pump as claimed in claim 26, wherein this control apparatus (11) is suitable for:
The default top speed of-pump (1) speed that will calculate and this pump (1) relatively and
If the speed of-this calculating is lower than this default top speed, then with the speed of described calculating this pump (1) that turns round,
If the speed of-this calculating is higher than this default top speed, then with described default top speed this pump (1) that turns round.
28. pump as claimed in claim 21, wherein this control apparatus (11) is suitable for:
-with velocity level's pump (1) that turns round of expection,
-based on the performance number of this sensing device (16), judge whether the power of this motor (9) is higher than the predetermined reference level of the power of this motor (9) at this motor (9) of this goal pace level acquisition.
29. pump as claimed in claim 28, wherein this control apparatus (11) is suitable for:
If-judge not meet predetermined condition, then with the velocity level of the expection pump (1) that turns round; Or
-with predetermined speed at preset time antiport pump (1) in the cycle; With
If-judge to conform to a predetermined condition, then after the predetermined period of time of described reverse operation, with the velocity level of this expection pump (1) that on the proper functioning direction, turns round.
30. pump as claimed in claim 21, wherein this control apparatus (11) is suitable for regularly carrying out at this pump (1) duration of work:
-with predetermined speed at preset time antiport pump (1) in the cycle; With
-after the predetermined period of time of described reverse operation, with velocity level's pump (1) that on the proper functioning direction, turns round of expection.
31. a pumping plant that comprises as any described pump among the claim 20-30 also comprises the operator unit (22) that contains input device (24) and display unit (26), it is suitable for providing the relevant information of work with this pump (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EPPCT/EP2005/052878 | 2005-06-21 | ||
| PCT/EP2005/052878 WO2006136202A1 (en) | 2005-06-21 | 2005-06-21 | Control system for a pump |
| PCT/SE2006/000710 WO2006137777A1 (en) | 2005-06-21 | 2006-06-15 | Control system for a pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101203678A CN101203678A (en) | 2008-06-18 |
| CN101203678B true CN101203678B (en) | 2010-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006800222782A Active CN101203678B (en) | 2005-06-21 | 2006-06-15 | Pump, method for operating the pump and pump station comprising the pump |
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| EP (1) | EP1893874B1 (en) |
| JP (1) | JP5017665B2 (en) |
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| AR (1) | AR054792A1 (en) |
| AU (1) | AU2006259944B2 (en) |
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- 2006-06-15 NZ NZ562227A patent/NZ562227A/en unknown
- 2006-06-15 AP AP2007004184A patent/AP2193A/en active
- 2006-06-15 JP JP2008518076A patent/JP5017665B2/en not_active Expired - Fee Related
- 2006-06-15 KR KR1020077026145A patent/KR101284821B1/en not_active IP Right Cessation
- 2006-06-15 WO PCT/SE2006/000710 patent/WO2006137777A1/en active Application Filing
- 2006-06-15 CN CN2006800222782A patent/CN101203678B/en active Active
- 2006-06-15 BR BRPI0612493-3A patent/BRPI0612493A2/en not_active IP Right Cessation
- 2006-06-15 EA EA200800095A patent/EA011044B1/en not_active IP Right Cessation
- 2006-06-15 US US11/993,787 patent/US20100034665A1/en not_active Abandoned
- 2006-06-15 ZA ZA200709008A patent/ZA200709008B/en unknown
- 2006-06-15 AU AU2006259944A patent/AU2006259944B2/en not_active Ceased
- 2006-06-15 DK DK06747903.0T patent/DK1893874T3/en active
- 2006-06-15 CA CA2606556A patent/CA2606556C/en not_active Expired - Fee Related
- 2006-06-15 MX MX2007014262A patent/MX2007014262A/en not_active Application Discontinuation
- 2006-06-15 EP EP06747903.0A patent/EP1893874B1/en not_active Revoked
- 2006-06-20 MY MYPI20062918A patent/MY148008A/en unknown
- 2006-06-21 AR ARP060102667A patent/AR054792A1/en not_active Application Discontinuation
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2007
- 2007-09-25 IL IL186295A patent/IL186295A/en not_active IP Right Cessation
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2008
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20080015403A (en) | 2008-02-19 |
| BRPI0612493A2 (en) | 2012-01-03 |
| ZA200709008B (en) | 2009-09-30 |
| WO2006137777A1 (en) | 2006-12-28 |
| NZ562227A (en) | 2011-04-29 |
| AU2006259944A1 (en) | 2006-12-28 |
| JP2009510299A (en) | 2009-03-12 |
| CA2606556C (en) | 2013-11-19 |
| AP2193A (en) | 2011-01-07 |
| AU2006259944B2 (en) | 2011-11-24 |
| NO20080379L (en) | 2008-03-19 |
| EA011044B1 (en) | 2008-12-30 |
| IL186295A (en) | 2011-02-28 |
| DK1893874T3 (en) | 2018-07-02 |
| MX2007014262A (en) | 2008-01-22 |
| EA200800095A1 (en) | 2008-04-28 |
| JP5017665B2 (en) | 2012-09-05 |
| WO2006136202A1 (en) | 2006-12-28 |
| CN101203678A (en) | 2008-06-18 |
| MY148008A (en) | 2013-02-28 |
| AP2007004184A0 (en) | 2007-10-31 |
| AR054792A1 (en) | 2007-07-18 |
| EP1893874A1 (en) | 2008-03-05 |
| IL186295A0 (en) | 2008-01-20 |
| EP1893874B1 (en) | 2018-05-02 |
| KR101284821B1 (en) | 2013-07-10 |
| US20100034665A1 (en) | 2010-02-11 |
| CA2606556A1 (en) | 2006-12-28 |
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