CN104196696B - Pump drive system - Google Patents
Pump drive system Download PDFInfo
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- CN104196696B CN104196696B CN201410424664.0A CN201410424664A CN104196696B CN 104196696 B CN104196696 B CN 104196696B CN 201410424664 A CN201410424664 A CN 201410424664A CN 104196696 B CN104196696 B CN 104196696B
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Abstract
The present invention discloses a kind of pump drive system.Described pump drive system comprises: frequency variator, motor, work frequency conversion switch type hydraulic couplers and water pump; Work frequency conversion switch type hydraulic couplers comprises: lubricating pump, work oil pump, gear type stepless speed changer, gear-box and hydraulic couplers; Frequency variator is connected with the input end of motor; The input shaft of gear-box is connected with the output shaft of motor; The output shaft of gear-box is connected with the input shaft of gear type stepless speed changer; The output shaft of gear type stepless speed changer is connected with the oil pump that works with lubricating pump respectively; Lubricating pump is connected with hydraulic couplers respectively with work oil pump; The output shaft of gear-box is connected with the input shaft of hydraulic couplers; The output shaft of hydraulic couplers is connected with water pump.Adopt pump drive system provided by the invention, the mode adopting gear drive lubricating pump and work oil pump can be continued, reduce power consumption and electric cost.
Description
Technical field
The present invention relates to actuation techniques field, particularly relate to a kind of pump drive system.
Background technique
Feed water pump generally can be used in thermal power plant, and feed water pump is used for, having uniform temperature, feedwater except peroxide in oxygen-eliminating device water storage box, flowing to boiler, to meet the needs of boiler feed water after improving pressure.Feed water pump will realize normal operation, just needs drive system to drive.In current technology, general adopt motor driven liquid mechanical couple, hydraulic couplers drive the mode of feed water pump realize to feed water pump effective, drive reposefully.Between motor and hydraulic couplers, generally gear-box is set, lubricating pump is connected with the output shaft of gear-box respectively with work oil pump, in current technology, general motor power frequency operation, rotating speed keeps constant, thus the rotating speed of the output shaft of gear-box also keeps constant, can meet the requirement of the rated speed of lubricating pump and work oil pump.
Along with the reinforcement day by day of environmental protection and awareness of saving energy, at present, occurred that motor frequency conversion runs the application case driving hydraulic couplers, motor frequency conversion runs to realize energy-conservation object.Motor frequency conversion runs and causes motor speed non-constant, and the output shaft rotating speed of gear-box can be caused also non-constant, thus in some time period, the output shaft rotating speed of gear-box can not meet the requirement of the rated speed of lubricating pump and work oil pump.In current technology, be abandon gear-box gear drive lubricating pump and work oil pump to the settling mode of the problems referred to above, change into and respectively configure a motor to lubricating pump and work oil pump respectively, drive lubricating pump and work oil pump in order to realize motor.Like this, when the motor frequency conversion be connected with gear-box runs, lubricating pump and work oil pump also can normally work.
But, in current technology, introduce the mode that two motors drive lubricating pump and work oil pump respectively, extra power consumption can be increased, directly cause the increase of electric cost.
Summary of the invention
In view of this, the invention provides a kind of pump drive system, in order to continue the mode adopting gear drive lubricating pump and work oil pump, thus avoid in prior art need introducing two motors drive respectively lubricating pump and work oil pump, abandon the mode of gear drive, the problem of the extra power consumption of the increase brought, increase electric cost.
For achieving the above object, the invention provides following technological scheme:
A kind of pump drive system, comprising:
Frequency variator, motor, work frequency conversion switch type hydraulic couplers and water pump;
Described work frequency conversion switch type hydraulic couplers comprises: lubricating pump, work oil pump, gear type stepless speed changer, gear-box and hydraulic couplers;
Described frequency variator is connected with the input end of described motor;
The input shaft of described gear-box is connected with the output shaft of described motor;
The output shaft of described gear-box is connected with the input shaft of described gear type stepless speed changer;
The output shaft of described gear type stepless speed changer is connected with described work oil pump with described lubricating pump respectively;
Described lubricating pump is connected with described hydraulic couplers respectively with described work oil pump;
The output shaft of described gear-box is connected with the input shaft of described hydraulic couplers;
The output shaft of described hydraulic couplers is connected with described water pump.
Preferably, described frequency variator is high voltage converter.
Preferably, described motor is variable-frequency motor.
Preferably, described gear-box is acceleration type gear-box.
Preferably, described frequency variator is connected with programmable logic controller (PLC) PLC.
Preferably, described gear type stepless speed changer is connected with described programmable logic controller (PLC) PLC.
Preferably, also comprise:
Be arranged on the power frequency operation circuit between described motor and described programmable logic controller (PLC) PLC.
Preferably, the outer installment of described frequency variator has rack, and described rack is provided with cooling unit.
Preferably, described cooling unit comprises:
First air channel; Second air channel; Be connected with described first air channel, absorbed the suction unit of ambient air by described first air channel; Be connected with described suction unit, air carries out cooling the air water cold heat exchanger in rear feeding rack to external world; And be connected with described second air channel, absorb hot air in rack and the exhaust unit be discharged to by described second air channel by hot air in rack outside rack.
Preferably, described hydraulic couplers comprises scoop tube, pump impeller and turbine.
Known via above-mentioned technological scheme, compared with prior art, the invention provides a kind of pump drive system.Pump drive system provided by the invention, comprise gear type stepless speed changer, the output shaft of described gear type stepless speed changer is connected with described work oil pump with described lubricating pump respectively, the input shaft of described gear type stepless speed changer is connected with the output shaft of described gear-box, when Frequency Converter Control motor frequency conversion runs, described gear type stepless speed changer can carry out corresponding adjustment of rotational speed, enables the demand that the rotating speed of output shaft meets lubricating pump and the oil pump that works normally works.Therefore, technological scheme provided by the invention, run with under realizing energy-conservation prerequisite meeting motor frequency conversion, the mode adopting gear drive lubricating pump and work oil pump can be continued, thus avoid in prior art need introducing two motors drive respectively lubricating pump and work oil pump, abandon the mode of gear drive, the problem of the extra power consumption of the increase brought, increase electric cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the structural drawing of pump drive system in prior art;
The structural drawing of a kind of pump drive system that Fig. 2 provides for the embodiment of the present invention;
The structural drawing of the cooling device of frequency converter that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in further detail prior art and the present invention below in conjunction with the drawings and specific embodiments.
Refer to Fig. 1, Fig. 1 is the structural drawing of pump drive system in prior art.As shown in Figure 1, pump drive system of the prior art comprises:
Frequency variator 11, drive motor 12, gear-box 13, hydraulic couplers 14, lubricating pump 15, work oil pump 16, first motor 17, second motor 18 and water pump 19;
Described frequency variator 11 is connected with the input end of described motor 12;
The output shaft of described motor 12 is connected with the input shaft of described gear-box 13;
The output shaft of described gear-box 13 is connected with the input shaft of described hydraulic couplers 14;
The output terminal of described hydraulic couplers 14 is connected with described water pump 19;
Described lubricating pump 15 is connected with described hydraulic couplers 14 respectively with described work oil pump 16;
Described first motor 17 is connected with described lubricating pump 15;
Described second motor 18 is connected with described work oil pump 16.
Control described drive motor 12 converting operation by described frequency variator 11, realize energy-conservation object.But, described drive motor 12 converting operation causes described drive motor 12 rotating speed non-constant, the output shaft rotating speed of described gear-box 13 can be caused also non-constant, thus in some time period, the output shaft rotating speed of described gear-box 13 can not meet the requirement of the rated speed of described lubricating pump 15 and described work oil pump 16.As can be seen from above-mentioned current technological scheme, abandon lubricating pump 15 and described work oil pump 16 described in described gear-box 13 gear drive to the settling mode of the problems referred to above, change into respectively to described lubricating pump 15 and a described work oil pump 16 respectively configuration motor, drive described lubricating pump 15 and described work oil pump 16 in order to realize motor.Like this, during described drive motor 12 converting operation be connected with described gear-box 13, described lubricating pump 15 and described work oil pump 16 also can normally work.
But, in current technology, introduce the mode that two motors drive lubricating pump and work oil pump respectively, extra power consumption can be increased, directly cause the increase of electric cost.
For this reason, the invention provides a kind of new pump drive system, to solve problem existing in above-mentioned prior art.Specifically refer to following embodiment.
Embodiment
Refer to Fig. 2, the structural drawing of a kind of pump drive system that Fig. 2 provides for the embodiment of the present invention.As shown in Figure 2, the pump drive system that the embodiment of the present invention provides, comprising:
Frequency variator 21, motor 22, work frequency conversion switch type hydraulic couplers 23 and water pump 24;
Described work frequency conversion switch type hydraulic couplers 23 comprises: lubricating pump 231, work oil pump 232, gear type stepless speed changer 233, gear-box 234 and hydraulic couplers 235;
Described frequency variator 21 is connected with the input end of described motor 22;
The input shaft of described gear-box 234 is connected with the output shaft of described motor 22;
The output shaft of described gear-box 234 is connected with the input shaft of described gear type stepless speed changer 233;
The output shaft of described gear type stepless speed changer 233 is connected with described work oil pump 232 with described lubricating pump 231 respectively;
Described lubricating pump 231 is connected with described hydraulic couplers 235 respectively with described work oil pump 232;
The output shaft of described gear-box 234 is connected with the input shaft of described hydraulic couplers 235;
The output shaft of described hydraulic couplers 235 is connected with described water pump 24.
Concrete, drive described gear-box 234 by motor 22, described gear-box 234 accepts motor 22 and drives rear and then drive described hydraulic couplers 235.
Concrete, the pump drive system that the embodiment of the present invention provides, described frequency variator 21 optionally, is high voltage converter.The outer installment of described frequency variator 21 has rack.
Concrete, the pump drive system that the embodiment of the present invention provides, described motor 22 optionally, is variable-frequency motor.Described frequency variator 21 is connected with the input end of described motor 22, by frequency variator 21, makes motor 22 converting operation, thus the rotating speed of motor 22 is constantly changed.
It should be noted that, frequency variator can produce many heats in running, if these heats can not get timely process, frequency variator temperature can be made to raise further, cause the equipment operation failures such as tripping operation.In existing technology, install suction type radiation fan at the control cabinet top of frequency variator, in order to the heat in control cabinet is discharged, but because heat is large, this radiating mode effect is unsatisfactory.For this reason, on the basis of existing technology, the embodiment of the present invention provides a kind of cooling device of frequency converter, in order to ensure that frequency variator can normally run, and is unlikely to break down because of overheated in the process implementing technical solution of the present invention.
Refer to Fig. 3, the structural drawing of the cooling device of frequency converter that Fig. 3 provides for the embodiment of the present invention.The cooling device of frequency converter that the embodiment of the present invention provides is arranged on frequency converter cabinet, and as shown in Figure 3, this cooling device of frequency converter comprises:
First air channel 32, air channel 31, second, suction unit 33, air water cold heat exchanger 34, and exhaust unit 35;
Described suction unit 33 is connected with described first air channel 31, absorbs extraneous air, and sent into by ambient air in described air water cold heat exchanger 34 by described first air channel 31; Described air water cold heat exchanger 34 is connected with described suction unit 33, lowers the temperature, then blow in rack by the ambient air through cooling processing for air to external world;
Described exhaust unit 35 is connected with described second air channel 32, for absorbing hot air in rack and being discharged into outside rack by described second air channel 32 by hot air in rack.
By the cooling device of frequency converter that the embodiment of the present invention provides, ambient air is constantly sent in described air water cold heat exchanger 34 by suction unit 33, described air water cold heat exchanger 34 to external world air is lowered the temperature, then continuous the ambient air through cooling processing is blown in rack, hot air in rack is constantly discharged to outside rack by exhaust unit 35, final realization cools preferably to frequency variator, ensures that frequency variator normally runs.
Concrete, the pump drive system that the embodiment of the present invention provides, described lubricating pump 231 provides power support for the lubrication oil circulation of described hydraulic couplers 235.
Concrete, in the pump drive system that the embodiment of the present invention provides, described hydraulic couplers 235 carries out Energy Transfer by oily for medium, and working oil will circulate, and just needs to add the described work oil pump 232 that the embodiment of the present invention provides.
Concrete, the pump drive system that the embodiment of the present invention provides, described gear-box 234 optionally, is acceleration type gear-box, the rotating speed that rotating speed and hydraulic couplers 235 in order to increase motor 22 input export.
Concrete, the pump drive system that the embodiment of the present invention provides, described water pump 24 optionally, is feed water pump.
Further, the pump drive system that the embodiment of the present invention provides, the described frequency variator 21 be connected with described motor 22, PLC (the ProgrammableLogicController of the other end and described pump drive system outside, programmable logic controller (PLC)) be connected, for accepting the control of PLC, thus control described motor 22 and realize converting operation.
Further, between the PLC of described motor 22 and described pump drive system outside, optionally, be also provided with power frequency operation circuit (power frequency bypass), namely described motor 22 is also connected with described PLC by power frequency operation circuit.Obviously, when PLC is by power frequency operation control circui motor 22, motor 22 can power frequency operation.
Further, the pump drive system that the embodiment of the present invention provides, described gear type stepless speed changer 233 is connected with described programmable logic controller (PLC) PLC, in the process that PLC controls motor 22, can control accordingly described gear type stepless speed changer 233 simultaneously, no matter make motor 22 power frequency operation or converting operation, described gear type stepless speed changer 233 can both respond in time, ensure the invariablenes turning speed outputting to described lubricating pump 231 and described work oil pump 232, meet the requirement of described lubricating pump 231 and the normal work of described both work oil pumps 232, namely the rotating speed that described gear type stepless speed changer 233 outputs to described lubricating pump 231 and described work oil pump 232 can reach the two nominal operation rotating speed.Such as, when outside PLC is power frequency operation to the control overflow of motor 22, gear-box 234 in the pump drive system that motor 22 power frequency operation drives the embodiment of the present invention to provide, meanwhile, outside PLC together with time control the described gear type stepless speed changer 233 that the embodiment of the present invention provides, make the state that described gear type stepless speed changer 233 keeps input output rotating speed consistent, such as, when outside PLC is converting operation to the control overflow of motor 22, PLC controls described motor 22 converting operation by described frequency variator 21, gear-box 234 in the pump drive system that motor 22 converting operation drives the embodiment of the present invention to provide, meanwhile, outside PLC together with time control the described gear type stepless speed changer 233 that the embodiment of the present invention provides, make the state that described gear type stepless speed changer 233 keeps output speed constant, and no matter how input speed changes, output speed, optionally, equal the rotating speed of the output shaft of described gear-box 234 during motor 22 power frequency operation.Therefore, no matter drive motor 22 power frequency operation of described gear-box 234, or converting operation, the pump drive system that the embodiment of the present invention provides can both operate normally.
Therefore, the pump drive system that the embodiment of the present invention provides, both has the speed regulation type hydrodynamic coupler method of operation of volumetric speed control during the input of power frequency constant speed, has again the step-up gear method of operation of frequency control of motor speed during frequency control of motor speed input, two kinds of modes can switch mutually, and an operation one is for subsequent use.
Concrete, the pump drive system that the embodiment of the present invention provides, described hydraulic couplers 235 comprises pump impeller and turbine.
Concrete, the pump impeller of described hydraulic couplers 235 and turbine form an airtight active chamber that liquid-circulating can be made to flow, and pump impeller is contained on input shaft, and turbine cartridge is on output shaft.When motor band driven input shaft rotates, liquid is centrifuged formula pump impeller and throws away.Namely this high-speed liquid promotes turbine and rotates after entering turbine, by the energy transferring that obtains from pump impeller to output shaft.Final liquid returns pump impeller, forms the flowing gone round and begun again.Hydraulic couplers carrys out transmitting torque by the change producing the moment of momentum that interacts of the blade of liquid and pump impeller, turbine.
Further, the pump drive system that the embodiment of the present invention provides, described hydraulic couplers 235 comprises scoop tube.During motor 22 power frequency operation, when namely applying power frequency input, carried out the mode of volumetric speed control by scoop tube; During motor 22 converting operation, when namely applying frequency conversion input, scoop tube is fixed on 100%, active wheel internal-filling liquid amount is fixed, pump impeller and turbine now play the effect of coupling, and by the speedup of step-up gear, hydraulic couplers 235 efficiency is now the peak efficiency of hydraulic couplers 235.The input shaft of hydraulic couplers 235, the rotating speed of output shaft are regulated by motor 22 converting operation.Overall efficiency equals frequency variator 21 efficiency and speed regulation type hydrodynamic coupler 235 peak efficiency is long-pending, the difference of overall efficiency when output speed is identical and volumetric speed control efficiency, namely be power saving rate, when output speed is less than or equal to rated speed 75%, power saving rate can reach more than 20%.
Known via above-mentioned technological scheme, compared with prior art, the invention provides a kind of pump drive system.Pump drive system provided by the invention, comprise gear type stepless speed changer, the output shaft of described gear type stepless speed changer is connected with described work oil pump with described lubricating pump respectively, the input shaft of described gear type stepless speed changer is connected with the output shaft of described gear-box, when Frequency Converter Control motor frequency conversion runs, described gear type stepless speed changer can carry out corresponding adjustment of rotational speed, enables the demand that the rotating speed of output shaft meets lubricating pump and the oil pump that works normally works.Therefore, technological scheme provided by the invention, run with under realizing energy-conservation prerequisite meeting motor frequency conversion, the mode adopting gear drive lubricating pump and work oil pump can be continued, thus avoid in prior art need introducing two motors drive respectively lubricating pump and work oil pump, abandon the mode of gear drive, the problem of the extra power consumption of the increase brought, increase electric cost.
Meanwhile, prior art work oil pump and lubricating pump is added a motor respectively drive, and the outside of pump drive system hauled out work oil pump and lubricating pump by general needs, increases place and use, need to transform place.Apply pump drive system provided by the invention, because not needing introducing two motors to drive work oil pump and lubricating pump respectively, therefore do not need the outside of work oil pump and lubricating pump being hauled out pump drive system, just avoid the problem that place is transformed yet.
In addition, in prior art, introducing two motors are needed to drive work oil pump and lubricating pump respectively, these two motors also need to arrange control cabinet, therefore, many inputs can be increased, and pump drive system provided by the invention, only need to increase gear type stepless speed changer, fund input is fewer than prior art.
In addition, technological scheme provided by the invention, additionally provide a kind of cooling device of frequency converter, can ensure to run at motor frequency conversion to realize energy-conservation, gear type stepless speed changer and drive lubricating pump and work oil pump to realize economize on electricity respectively and while reducing cost, further realization cools preferably to frequency variator, ensureing that frequency variator normally runs, providing Reliable guarantee for implementing technological scheme of the present invention.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or control panel, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a pump drive system, is characterized in that, comprising:
Frequency variator, motor, work frequency conversion switch type hydraulic couplers and water pump;
Described work frequency conversion switch type hydraulic couplers comprises: lubricating pump, work oil pump, gear type stepless speed changer, gear-box and hydraulic couplers;
Described frequency variator is connected with the input end of described motor;
The input shaft of described gear-box is connected with the output shaft of described motor;
The output shaft of described gear-box is connected with the input shaft of described gear type stepless speed changer;
The output shaft of described gear type stepless speed changer is connected with described work oil pump with described lubricating pump respectively;
Described lubricating pump is connected with described hydraulic couplers respectively with described work oil pump;
The output shaft of described gear-box is connected with the input shaft of described hydraulic couplers;
The output shaft of described hydraulic couplers is connected with described water pump.
2. pump drive system according to claim 1, is characterized in that, described frequency variator is high voltage converter.
3. pump drive system according to claim 1, is characterized in that, described motor is variable-frequency motor.
4. pump drive system according to claim 1, is characterized in that, described gear-box is acceleration type gear-box.
5. pump drive system according to claim 1, is characterized in that, described frequency variator is connected with programmable logic controller (PLC) PLC.
6. pump drive system according to claim 5, is characterized in that, described gear type stepless speed changer is connected with described programmable logic controller (PLC) PLC.
7. pump drive system according to claim 1, is characterized in that, also comprises:
Be arranged on the power frequency operation circuit between described motor and described programmable logic controller (PLC) PLC.
8. pump drive system according to claim 1, is characterized in that, the outer installment of described frequency variator has rack, and described rack is provided with cooling unit.
9. pump drive system according to claim 8, is characterized in that, described cooling unit comprises:
First air channel; Second air channel; Be connected with described first air channel, absorbed the suction unit of ambient air by described first air channel; Be connected with described suction unit, air carries out cooling the air water cold heat exchanger in rear feeding rack to external world; And be connected with described second air channel, absorb hot air in rack and the exhaust unit be discharged to by described second air channel by hot air in rack outside rack.
10. pump drive system according to claim 1, is characterized in that, described hydraulic couplers comprises scoop tube, pump impeller and turbine.
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| CN201410424664.0A CN104196696B (en) | 2014-08-26 | 2014-08-26 | Pump drive system |
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| CN201410424664.0A CN104196696B (en) | 2014-08-26 | 2014-08-26 | Pump drive system |
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| CN104196696A CN104196696A (en) | 2014-12-10 |
| CN104196696B true CN104196696B (en) | 2016-03-16 |
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| CN104806534A (en) * | 2015-05-05 | 2015-07-29 | 上海阿波罗机械股份有限公司 | System for testing variable rotating speed performance of main water feed pump of nuclear power station |
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