CN104196696A - Water pump driving system - Google Patents
Water pump driving system Download PDFInfo
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- CN104196696A CN104196696A CN201410424664.0A CN201410424664A CN104196696A CN 104196696 A CN104196696 A CN 104196696A CN 201410424664 A CN201410424664 A CN 201410424664A CN 104196696 A CN104196696 A CN 104196696A
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Abstract
The invention discloses a water pump driving system which comprises a frequency converter, a motor, a working frequency switching hydraulic coupler and a water pump. The working frequency switching hydraulic coupler comprises a lubricating oil pump, a working oil pump, a gear type continuously variable transmission, a gearbox and a hydraulic coupler. The frequency converter is connected with the input end of the motor, and an input shaft of the gearbox is connected with an output shaft of the motor. An output shaft of the gearbox is connected with an input shaft of the gear type continuously variable transmission. An output shaft of the gear type continuously variable transmission is connected with the lubricating oil pump and the working oil pump respectively. The lubricating oil pump and the working oil pump are both connected with the hydraulic coupler, the output shaft of the gearbox is connected with an input shat of the hydraulic coupler, and an output shaft of the hydraulic coupler is connected with the water pump. The mode that a gear is used for driving the lubricating oil pump and the working oil pump can be continuously adopted in the water pump driving system, and electricity consumption and electricity consumption cost are reduced.
Description
Technical field
The present invention relates to actuation techniques field, relate in particular to a kind of pump drive system.
Background technique
Feed water pump generally can be used in thermal power plant, and feed water pump, for the feedwater that has uniform temperature in oxygen-eliminating device water storage box, removes peroxide, flows to boiler after raising pressure, to meet the needs of boiler feed water.Feed water pump will be realized normal operation, drives with regard to demand motive system.In current technology, generally adopt motor driven liquid mechanical couple, hydraulic couplers drive the mode of feed water pump realize to feed water pump effectively, drive reposefully.Between motor and hydraulic couplers, operated by rotary motion gear-box, lubricating pump is connected with the output shaft of gear-box respectively with work oil pump, in current technology, general motor power frequency operation, it is constant that rotating speed keeps, constant thereby the rotating speed of the output shaft of gear-box also keeps, and 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, occur that motor frequency conversion operation drives the application case of hydraulic couplers, motor frequency conversion moves to realize energy-conservation object.Motor frequency conversion operation causes motor speed non-constant, can cause the output shaft rotating speed of gear-box also non-constant, thereby 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 technology, be to abandon gear-box gear drive lubricating pump and work oil pump to the settling mode of the problems referred to above at present, change into respectively to lubricating pump and a motor of the each configuration of work oil pump, in order to realize motor driving lubricating pump and work oil pump.Like this, when the motor frequency conversion being connected with gear-box moves, lubricating pump and work oil pump also can normally be worked.
But, in current technology, introduce two motors drive respectively lubricating pump and work oil pump mode, can increase extra power consumption, 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 to adopt the mode of gear drive lubricating pump and work oil pump, thereby avoid needing to introduce two motors in prior art and driven respectively lubricating pump and work oil pump, abandon the mode of gear drive, the extra power consumption of increase bringing, the problem that increases 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, on described rack, is provided with cooling unit.
Preferably, described cooling unit comprises:
The first air channel; The second air channel; Be connected with described the first air channel, absorb the suction unit of ambient air by described the first air channel; Be connected with described suction unit, air carries out after cooling sending into the air water cold heat exchanger in rack to external world; And be connected with described the second air channel, absorb the interior hot air of rack and hot air in rack is discharged to the exhaust unit outside rack by described the second air channel.
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, in the time that Frequency Converter Control motor frequency conversion moves, described gear type stepless speed changer can carry out corresponding adjustment of rotational speed, makes the rotating speed of output shaft can meet the demand of lubricating pump and the normal work of work oil pump.Therefore, technological scheme provided by the invention, move to realize under energy-conservation prerequisite meeting motor frequency conversion, can continue to adopt the mode of gear drive lubricating pump and work oil pump, thereby avoid needing to introduce two motors in prior art and driven respectively lubricating pump and work oil pump, abandon the mode of gear drive, the extra power consumption of increase bringing, the problem that increases electric cost.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
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, the technological scheme in the embodiment of the present invention is clearly and completely described, 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 who obtains under creative work prerequisite, belong to the scope of protection of the invention.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, prior art and the present invention are described in further detail.
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, the first motor 17, the second motors 18 and water pumps 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 the first motor 17 is connected with described lubricating pump 15;
Described the second motor 18 is connected with described work oil pump 16.
Control described drive motor 12 converting operations by described frequency variator 11, realize energy-conservation object.But, described drive motor 12 converting operations cause described drive motor 12 rotating speeds non-constant, can cause the output shaft rotating speed of described gear-box 13 also non-constant, thereby 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.Can be found out by above-mentioned current technological scheme, to 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 and respectively configure a motor to described lubricating pump 15 and described work oil pump 16, drive described lubricating pump 15 and described work oil pump 16 in order to realize motor.Like this, when described drive motor 12 converting operation that is connected with described gear-box 13, described lubricating pump 15 and described work oil pump 16 also can normally be worked.
But, in current technology, introduce two motors drive respectively lubricating pump and work oil pump mode, can increase extra power consumption, directly cause the increase of electric cost.
For this reason, the invention provides a kind of new pump drive system, to solve existing problem 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, driving described gear-box 234 by motor 22, described gear-box 234 is accepted motor 22 and is driven afterwards and then drive described hydraulic couplers 235.
Concrete, the pump drive system that the embodiment of the present invention provides, described frequency variator 21, optional, be 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, optional, be 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 operations, thereby 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 processing, can make frequency variator temperature further raise, and causes the equipment operation failures such as tripping operation.In existing technology, at the control cabinet top of frequency variator, suction type radiation fan is installed, in order to the heat in control cabinet is discharged, still, 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 implementing in the process of technical solution of the present invention, frequency variator can normally move, is unlikely to because overheated and break down.
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:
The first 31, the second air channels 32, air channel, suction unit 33, air water cold heat exchanger 34, and exhaust unit 35;
Described suction unit 33 is connected with described the first air channel 31, absorbs extraneous air by described the first air channel 31, and ambient air is sent in described air water cold heat exchanger 34; Described air water cold heat exchanger 34 is connected with described suction unit 33, lowers the temperature for air to external world, then the ambient air through cooling processing is blown in rack;
Described exhaust unit 35 is connected with described the second air channel 32, for absorbing in rack hot air and hot air in rack being discharged into outside rack by described the second air channel 32.
The cooling device of frequency converter providing by the embodiment of the present invention, suction unit 33 is constantly sent into ambient air in described air water cold heat exchanger 34, described air water cold heat exchanger 34 to external world air is lowered the temperature, then constantly the ambient air through cooling processing is blown in rack, exhaust unit 35 is constantly discharged to the hot air in rack outside rack, final realization is cooling preferably to frequency variator, ensures that frequency variator normally moves.
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 is that medium carries out Energy Transfer by oil, working oil will circulate, the described work oil pump 232 that just need to add the embodiment of the present invention to provide.
Concrete, the pump drive system that the embodiment of the present invention provides, described gear-box 234, optional, be acceleration type gear-box, the rotating speed of exporting in order to increase rotating speed that motor 22 inputs and hydraulic couplers 235.
Concrete, the pump drive system that the embodiment of the present invention provides, described water pump 24, optional, be feed water pump.
Further, the pump drive system that the embodiment of the present invention provides, the described frequency variator 21 being connected with described motor 22, PLC (the Programmable Logic Controller of the other end and described pump drive system outside, programmable logic controller (PLC)) be connected, for accepting the control of PLC, realize converting operation thereby control described motor 22.
Further, between described motor 22 and the PLC of described pump drive system outside, optional, be also provided with power frequency operation circuit (power frequency bypass), described motor 22 is also connected with described PLC by power frequency operation circuit.Obviously,, when PLC passes through power frequency operation circuit control motor 22, motor 22 can power frequency operations.
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 of motor 22 being controlled at PLC, can control accordingly described gear type stepless speed changer 233 simultaneously, no matter make motor 22 power frequency operations or converting operation, described gear type stepless speed changer 233 can both respond in time, guarantee outputs to the invariablenes turning speed of described lubricating pump 231 and described work oil pump 232, meet the requirement of described lubricating pump 231 and 232 the two the normal work of described work oil pump, it is the nominal operation rotating speed that 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.Such as, when outside PLC requires as power frequency operation to the control of motor 22, gear-box 234 in the pump drive system that the motor 22 power frequency operations driving embodiment of the present invention 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 described gear type stepless speed changer 233 keep the consistent state of input output rotating speed, such as, when outside PLC requires as converting operation to the control of motor 22, PLC controls described motor 22 converting operations by described frequency variator 21, gear-box 234 in the pump drive system that the motor 22 converting operations driving embodiment of the present invention 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 described gear type stepless speed changer 233 keep the constant state of output speed, and no matter how input speed changes, output speed, optionally, the rotating speed of the output shaft of gear-box 234 described in while equaling motor 22 power frequency operation.Therefore, no matter drive motor 22 power frequency operations 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, the speed regulation type hydrodynamic coupler method of operation of volumetric speed control while both having there is the input of power frequency constant speed, the step-up gear method of operation of frequency control of motor speed while thering is again frequency control of motor speed input, two kinds of modes can be switched mutually, and one of an operation 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 airtight active chamber that can make liquid-circulating flow of turbine composition, pump impeller is contained on input shaft, and turbine cartridge is on output shaft.When the rotation of motor band driven input shaft, liquid is centrifuged formula pump impeller and throws away.This high-speed liquid promotes turbine rotation after entering turbine, and the energy obtaining from pump impeller is passed to output shaft.Final liquid returns to pump impeller, forms flowing of going round and beginning again.By the blade of liquid and pump impeller, turbine, the interact variation of the generation moment of momentum carrys out transmitting torque to hydraulic couplers.
Further, the pump drive system that the embodiment of the present invention provides, described hydraulic couplers 235 comprises scoop tube.When motor 22 power frequency operation, while applying power frequency input, carry out the mode of volumetric speed control by scoop tube; When motor 22 converting operation, while 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 regulate by motor 22 converting operations.Overall efficiency equals frequency variator 21 efficiency and speed regulation type hydrodynamic coupler 235 peak efficiencies are long-pending, overall efficiency when output speed is identical and volumetric speed control efficiency poor, 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, in the time that Frequency Converter Control motor frequency conversion moves, described gear type stepless speed changer can carry out corresponding adjustment of rotational speed, makes the rotating speed of output shaft can meet the demand of lubricating pump and the normal work of work oil pump.Therefore, technological scheme provided by the invention, move to realize under energy-conservation prerequisite meeting motor frequency conversion, can continue to adopt the mode of gear drive lubricating pump and work oil pump, thereby avoid needing to introduce two motors in prior art and driven respectively lubricating pump and work oil pump, abandon the mode of gear drive, the extra power consumption of increase bringing, the problem that increases electric cost.
Meanwhile, prior art is to add respectively a motor to drive in work oil pump and lubricating pump, generally work oil pump and lubricating pump need to be hauled out to the outside of pump drive system, increases place and uses, and need to transform place.Apply pump drive system provided by the invention, drive respectively work oil pump and lubricating pump because not needing to introduce two motors, therefore do not need work oil pump and lubricating pump to haul out the outside of pump drive system, just avoided the problem that place is transformed yet.
In addition, in prior art, two motors be need to introduce and work oil pump and lubricating pump driven respectively, these two motors also need to arrange control cabinet, therefore, can increase many inputs, 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, a kind of cooling device of frequency converter is also provided, can ensure when motor frequency conversion operation realizes energy-conservation, gear type stepless speed changer and drives respectively lubricating pump and work oil pump to realize economize on electricity and reduce cost, further realize cooling preferably to frequency variator, ensure that frequency variator normally moves, provide Reliable guarantee for implementing technological scheme of the present invention.
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or control panel, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have 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 and other embodiments' difference, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to these embodiments' multiple amendment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will 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, on described rack, is provided with cooling unit.
9. pump drive system according to claim 8, is characterized in that, described cooling unit comprises:
The first air channel; The second air channel; Be connected with described the first air channel, absorb the suction unit of ambient air by described the first air channel; Be connected with described suction unit, air carries out after cooling sending into the air water cold heat exchanger in rack to external world; And be connected with described the second air channel, absorb the interior hot air of rack and hot air in rack is discharged to the exhaust unit outside rack by described the second air channel.
10. pump drive system according to claim 1, is characterized in that, described hydraulic couplers comprises scoop tube, pump impeller and turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424664.0A CN104196696B (en) | 2014-08-26 | 2014-08-26 | Pump drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424664.0A CN104196696B (en) | 2014-08-26 | 2014-08-26 | Pump drive system |
Publications (2)
| Publication Number | Publication Date |
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| CN104196696A true CN104196696A (en) | 2014-12-10 |
| CN104196696B CN104196696B (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410424664.0A Active CN104196696B (en) | 2014-08-26 | 2014-08-26 | Pump drive system |
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| CN (1) | CN104196696B (en) |
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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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| Publication number | Publication date |
|---|---|
| CN104196696B (en) | 2016-03-16 |
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