CN206506411U - A kind of Generalized Conversion system with fore pump - Google Patents
A kind of Generalized Conversion system with fore pump Download PDFInfo
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- CN206506411U CN206506411U CN201720225471.1U CN201720225471U CN206506411U CN 206506411 U CN206506411 U CN 206506411U CN 201720225471 U CN201720225471 U CN 201720225471U CN 206506411 U CN206506411 U CN 206506411U
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Abstract
The utility model discloses a kind of Generalized Conversion system with fore pump, it at least includes the adjustable steam turbine of rotating speed, feed pump, fore pump, frequency conversion generator and gear-box；As unit load changes, the amount of drawing gas and parameter into the steam turbine can respective changes, the turbine speed synchronously change, so that on the one hand change feed pump, preposition revolution speed, on the one hand changes the frequency for the alternating current that generator is exported.The utility model, come the driving fore pump of direct mechanical formula, is realized the variable speed operation of fore pump, had both improved the performance driving economy of fore pump, system security reliability is improved again by gear-box.
Description
Technical field
The utility model is applied to power field, more particularly to a kind of Generalized Conversion system with fore pump.
Background technology
In the production process in power plant, water is heated in the boiler becomes steam, then utilizes the rotation of Steam Actuation steam turbine
Turn, drive generator rotation, the chemical energy of fuel is ultimately converted to electric energy.During generating, it is big that power plant is equipped with
The rotation subsidiary engine such as amount Pumps ＆ Fans needs to consume a large amount of electric energy.Current common practices is by house transformer, by what is sent out
Electricity is drawn a part and used for station-service subsidiary engine.
The capacity of subsidiary engine is typically chosen in power plant in engineering design by greatest requirements and plus certain surplus, because
And the subsidiary engine in actual motion has larger allowance.And when the subsidiary engine that constant speed is run is not run, particularly under full capacity
In underrun, its operating efficiency can drastically decline, and this causes the serious waste of electric energy.If using frequency control skill
Art, then can make the operating point of subsidiary engine as close to high efficient district, and reduction blower fan baffle plate, the throttling of valve are damaged to greatest extent
Lose, substantially reduce energy consumption during equipment operation, the service life of extension device.It is former according to hydrodynamics by taking centrifugal blower as an example
Reason, shaft power is directly proportional to the cube of rotating speed, and when institute's required airflow is reduced, and rotation speed of fan is reduced, its power presses the three of rotating speed
Power declines.Therefore, the energy-saving effect of variable-speed operation is considerable.
Variable-frequency control technique is current energy-saving and emission-reduction, improves technological process to improve product quality and improve environment, promotion
A kind of important means of technological progress.Frequency control with its excellent speed governing and open braking ability, high efficiency, high power factor and
The advantages of power savings and thought most promising mode of speed regulation both at home and abroad.Current power plant is mainly by installing frequency conversion additional
Device is to reach water pump or blower motor frequency, so as to change the rotating speed of water pump or blower fan, improves its operational efficiency, reaches section
Can emission reduction purpose.
Present mode of frequency regulation mainly has thyristor frequency modulation, coupling fluid-structure frequency conversion and magnetic couple frequency conversion.In these three frequency conversions
In mode, coupling fluid-structure frequency-converter power is big, and reliability is low, cost is low, and its efficiency is directly proportional to the first power of rotating speed, degree of regulation
It is low.Magnetic couple frequency conversion reliability is high, cost highest, and its efficiency and rotating speed square are directly proportional, when rotating speed is low, efficiency
Low, additionally mounted magnetic couple device needs to change the installation site of motor either equipment, removes original foundation of civil work.Can
Silicon conversion efficiency highest is controlled, and its efficiency is not influenceed by load change, responds most fast, degree of regulation highest.At these three
In conversion method, controllable silicon frequency conversion cost is placed in the middle.From the point of view of cost and efficiency, the more use controllable silicon in power plant becomes
Frequency technology.
Because power plant requires higher to equipment dependability, the rotating machinery used, such as water circulating pump, pressure fan are set
Standby power is big, and voltage class is high, thus requires also high to the frequency converter for power plant.Frequency conversion is set employed in current power plant
It is standby mainly to use controllable silicon technology, and the disadvantage of controllable silicon converter technique is that voltage class is higher, its equipment dependability is got over
It is low, and frequency conversion equipment floor space is big, and its frequency-conversion harmonic all has an impact to power network and motor.Therefore, can in power plant
Control silicon converter technique popularization and application slower.With the development of technology, portioned product is had at present preferably to be solved
Problem is stated, but because these product prices are high, hinders its further genralrlization.
Therefore, patent " ZL2012 1 0006442.8 " proposes a kind of frequency conversion general supply system for thermal power plant
System.The system is not necessary to the alternating current of frequency needed for being obtained with by other frequency converters.But be disadvantageous in that, the system
Need additionally to configure a small turbine and a generator, and other supporting equipment, such as condenser, oil system.
Therefore, patent " ZL 2,014 2 0245755.3 " further provides a kind of new change for thermal power plant
Display system.I.e. small turbine side is directly connected to feed pump, and opposite side is connected by reduction gear box with frequency conversion generator, realizes
Two systems unite two into one.The system is disadvantageous in that, because the power of high rotating speed feed pump turbine is relatively large,
Existing manufacturing process, which is typically difficult to meet, to be required.
Therefore, patent " ZL 2,016 2 0307455.2 " further propose it is a kind of for turbine LP rotors
Generalized Conversion system, i.e. feed pump turbine connect feed pump by step-up gear, improve the economy of unit, while gram
The problem of rotating speed is more difficult to be matched is taken between frequency conversion steam turbine and feed pump.But it is disadvantageous in that, its fore pump according to
Conventional arrangement, is driven by power frequency supply, and not only underload economy is poor, and electric fault rate is larger, and influence is whole
The security of system.
In view of the above-mentioned deficiency of prior art, the purpose of this utility model is to provide the band of a kind of high-performance, high reliability
The Generalized Conversion system of fore pump.
Utility model content
The utility model provides a kind of Generalized Conversion system with fore pump, and it at least includes the adjustable steamer of rotating speed
Machine, feed pump, fore pump, gear-box and frequency conversion generator, it is characterised in that the steam turbine is driven simultaneously by the gear-box
The feed pump and the fore pump are moved, the steam turbine is connected with the generator, drag the electrical power generators.
If not setting exciter, need to use " separate excitation mode ", may also set up exciter, the exciter takes place frequently with the change
Motor connection.
Alternatively, the gear-box between the steam turbine and the fore pump, the feed pump is a composite teeth roller box,
The feed pump is to be connected in parallel with the fore pump.
Alternatively, the steam turbine is connected in series with the feed pump by a step-up gear, the feed pump with
The fore pump is connected in series by a reduction gear box.
A kind of Generalized Conversion system with fore pump that the utility model is provided, in addition to reverse clutch and variable-frequency electric
Machine, the reverse clutch is arranged between the steam turbine and the frequency conversion generator, according to " separate excitation mode ", i.e., without encouraging
Magnetomechanical, then the adjustable frequency motor be connected with the frequency conversion generator；If setting exciter, the exciter is arranged on institute
State between adjustable frequency motor and the frequency conversion generator.
Further, may also include forward clutch, according to " separate excitation mode ", i.e. exclterless, then it is described it is positive from
Clutch is arranged between the adjustable frequency motor and the frequency conversion generator；If exciter is set, by the forward clutch
It is arranged between the adjustable frequency motor and the exciter.
A kind of Generalized Conversion system with fore pump that the utility model is provided mainly has the following advantages that：
The utility model includes fore pump in Generalized Conversion system scope, is mechanically driven indirectly by gear-box preposition
Pump, is not using any type of electron electric power frequency converter, so that it may the variable speed operation of fore pump is realized, simultaneously because mechanically
Driving reliability itself is high, therefore is transported under such as running on the lower load that can be avoided routine " power frequency driving fore pump " mode and bring
The problems such as line efficiency is low, power frequency driving electric fault risk itself is high.
It is noted that the utility model is according to gear between the difference of excitation mode, steam turbine and feed pump, fore pump
The difference of case connected mode and whether with reverse clutch and forward clutch etc., with multiple combinations mode.
The technique effect of design of the present utility model, concrete structure and generation is made furtherly below with reference to accompanying drawing
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Brief description of the drawings
Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11 and Figure 12 are of the present utility model specific
The system schematic of embodiment；
Marked in figure：
1：Feed pump；2：Step-up gear；3：Steam turbine；4：Reverse clutch system；5：Frequency conversion generator； 6：It is positive
Clutch system；7：Adjustable frequency motor；8 fore pumps；9：Composite teeth roller box；10：Reduction gear box；11：Exciter.
Embodiment
Embodiment 1
As shown in figure 1, a kind of specific embodiment of Generalized Conversion system with fore pump of the present utility model, it includes giving
Water pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5, step-up gear 2, reduction gear box 10 and exciter 11.With unit
Load variations, corresponding regulation（Change）Into the steam parameter of the steam turbine and the amount of drawing gas, make the turbine speed respective change,
So as on the one hand change feed pump and preposition revolution speed indirectly by gear-box, on the other hand directly change the friendship of generator output
Flow the frequency of electricity.
Fore pump is included Generalized Conversion system by this programme.Fore pump in the present embodiment is by setting a reduction gearing
Case is connected on feed pump one end.Therefore, in low- load conditions, compared to more conventional power frequency drive arrangement mode, the program is not only
It can realize that fore pump is operated in relative efficiency area all the time, improve its performance driving economy, and substantially reduce power frequency supply band
The electric fault risk come, improves the reliability of system operation.It is noted that the load of fore pump is needed by feed pump
Axle to transmit, therefore generally also need to make Variant Design to feed pump shaft, in addition, can be by fore pump and connected reducing gear
Roller box is arranged to packaged type bottom plate, in order to service works such as feed pumps " core pulling bag ".
Embodiment 2
As shown in Fig. 2 a kind of another specific embodiment of Generalized Conversion system with fore pump of the present utility model, it is wrapped
Include feed pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5, exciter 11 and composite teeth roller box 9.As unit load changes,
Corresponding regulation（Change）Into the steam parameter of the steam turbine and the amount of drawing gas, make the turbine speed respective change, so that a side
Face changes feed pump and preposition revolution speed indirectly by composite teeth roller box, on the other hand directly changes the alternating current of generator output
Frequency.
Compared with Example 1, the embodiment by the composite teeth roller box of " one input two export " mode by fore pump with giving
Water pump is in parallel, i.e.,：Input connects steam turbine, and two output ends are connected in parallel feed pump and fore pump respectively.The embodiment is relative
Embodiment 1, the problem of transmitting preposition pump power in the absence of feed pump shaft, while two gear-boxes are united two into one, can accordingly drop
Low certain investment, in addition, the service work such as feed pump " core pulling bag " is also comparatively facilitated.
Embodiment 3
As shown in figure 3, a kind of another specific embodiment of Generalized Conversion system with fore pump of the present utility model, it is wrapped
Include feed pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5, reverse clutch 4；Exciter 11, adjustable frequency motor 7, speedup tooth
Roller box 2 and reduction gear box 10.As unit load changes, corresponding regulation（Change）Into the steam turbine steam parameter and take out
Vapour amount, makes the turbine speed respective change, so as on the one hand change feed pump and preposition revolution speed indirectly by gear-box, separately
On the one hand the frequency of the alternating current of generator output is directly changed.
Compared with Example 1, the embodiment installs a reverse clutch 4, Yi Jifa additional between steam turbine and generator
Motor output end installs an adjustable frequency motor 7 additional.
The system work general principle：When steam turbine operating, it is necessary to when driving frequency conversion generator, start variable-frequency electric first
Machine, drives frequency conversion generator, until reverse clutch exceedes the rotating speed close to steamer pusher side close to the rotating speed of generator side, this
When, reverse clutch still locates released state, then variable-frequency electric progressively reduction of speed, until the rotating speed of reverse clutch both sides is consistent,
The reverse clutch engagement, then steam turbine drive generator rotate simultaneously, completion generator put into online, if conversely, need to break
Motor is developed, then is further driven to frequency conversion generator using adjustable frequency motor, makes reverse clutch close to the rotating speed of generator side
More than the rotating speed close to steamer pusher side, so reverse clutch is just in released state.
The present embodiment can be realized in running once occurring unusual service condition, such as occur requiring that frequency conversion generator must stop transport
Unusual service condition when, can directly by reverse clutch system disconnect frequency conversion generator, switch to steam turbine and only drive feed pump to transport
Row state, substantially increases Generalized Conversion system shafting and main Turbo-generator Set reliability of operation.It is noted that the change
Frequency motor complete generator line input after, need to be uniform block operating.
It is noted that adjustable frequency motor need to be attached by the present embodiment with exciter, due to excitation general at present
Machine rotating shaft is relatively thin, therefore also needs to make Variant Design to exciter rotating shaft.
Embodiment 4
As shown in figure 4, a kind of another specific embodiment of Generalized Conversion system with fore pump of the present utility model, it is wrapped
Include feed pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5, reverse clutch 4, exciter 11, adjustable frequency motor 7, composite teeth
Roller box 9.As unit load changes, corresponding regulation（Change）Into the steam parameter of the steam turbine and the amount of drawing gas, make the steamer
Machine rotating speed respective change, so as on the one hand change feed pump and preposition revolution speed indirectly by gear-box, on the other hand directly changes
Become the frequency of the alternating current of generator output.
Compared with Example 2, the embodiment installs a reverse clutch 4, Yi Jifa additional between steam turbine and generator
Motor output end installs an adjustable frequency motor 7 additional.But the operation logic be the same as Example 3 of the embodiment, here is omitted, with reality
The main distinction for applying example 3 is fore pump and feedwater parallel connection of pumps by the composite teeth roller box of " one input two export " mode, because
The problem of feed pump shaft transmits preposition pump power is not present in this, while two gear-boxes are united two into one, can accordingly reduce certain
Investment, in addition, the service work such as feed pump " core pulling bag " also comparatively facilitate.
Embodiment 5
As shown in figure 5, a kind of another specific embodiment of Generalized Conversion system with fore pump of the present utility model, it is wrapped
Include feed pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5, forward clutch 6, reverse clutch 4；Exciter 11, variable-frequency electric
Motivation 7, step-up gear 2 and reduction gear box 10.As unit load changes, corresponding regulation（Change）Into the steam turbine
Steam parameter and the amount of drawing gas, make the turbine speed respective change, thus on the one hand changed indirectly by gear-box feed pump and
Preposition revolution speed, on the other hand directly changes the frequency of the alternating current of generator output.
Compared with Example 3, the embodiment installs a forward clutch 6 additional between adjustable frequency motor and generator.This
System work general principle：When steam turbine is operated, it is necessary to when driving frequency conversion generator, start adjustable frequency motor first, due to hair
The axle of motor and exciter is static, thus once starts adjustable frequency motor, and forward clutch is just engaged, and subsequently just drives frequency conversion
Generator, until reverse clutch exceedes the rotating speed close to steamer pusher side, now, reverse clutch close to the rotating speed of generator side
Still locate released state, then variable-frequency electric progressively reduction of speed, until the rotating speed of reverse clutch both sides is consistent, the reverse clutch is nibbled
Close, then steam turbine drives generator to rotate simultaneously, completion generator is put into online, if conversely, generator need to be disconnected, utilizing
Adjustable frequency motor first engages forward clutch, is then further driven to frequency conversion generator, makes reverse clutch close to generator side
Rotating speed exceed rotating speed close to steamer pusher side, so reverse clutch is just in released state, and then, adjustable frequency motor stops
Only, forward clutch is just separated.
The embodiment is due to being additionally arranged a forward clutch 6, therefore adjustable frequency motor puts into operation in completion frequency conversion generator
Afterwards, it is not required to one piece of operating of system for tracking.
Embodiment 6
As shown in fig. 6, a kind of another specific embodiment of Generalized Conversion system with fore pump of the present utility model, it is wrapped
Include feed pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5, forward clutch 6, reverse clutch 4, exciter 11, variable-frequency electric
Motivation 7, composite teeth roller box 9.As unit load changes, corresponding regulation（Change）Into the steam turbine steam parameter and draw gas
Amount, makes the turbine speed respective change, so that on the one hand change feed pump and preposition revolution speed indirectly by gear-box, it is another
Aspect directly changes the frequency of the alternating current of generator output.
Compared with Example 5, embodiment system work general principle is consistent, and here is omitted, and unique difference is
Steam turbine is to be connected by a composite teeth roller box with feed pump, fore pump.
Embodiment 7
As shown in fig. 7, a kind of another specific embodiment of Generalized Conversion system with fore pump of the present utility model, it is wrapped
Include feed pump 1, fore pump 8, steam turbine 3, reverse clutch 4, frequency conversion generator 5, adjustable frequency motor 7, step-up gear 2, subtract
Fast gear-box 10.As unit load changes, corresponding regulation（Change）Into the steam parameter of the steam turbine and the amount of drawing gas, make this
Turbine speed respective change, so that on the one hand change feed pump and preposition revolution speed indirectly by gear-box, it is on the other hand straight
Connect the frequency for the alternating current for changing generator output.
Compared with Example 3, the embodiment does not set the exciter being connected with generator, but uses " separate excitation mode ".By
Relatively thick in the axle of generator, therefore, adjustable frequency motor can be joined directly together more convenient with generator, it is to avoid exciter turns
The Variant Design of axle.
Embodiment 8
As shown in figure 8, a kind of another specific embodiment of Generalized Conversion system with fore pump of the present utility model, it is wrapped
Include feed pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5, reverse clutch 4, adjustable frequency motor 7 and composite teeth roller box 9.With
Unit load change, corresponding regulation（Change）Into the steam parameter of the steam turbine and the amount of drawing gas, make the turbine speed phase
It should change, so as on the one hand change feed pump and preposition revolution speed indirectly by gear-box, on the other hand directly change generator
The frequency of the alternating current of output.
Uniquely difference is that steam turbine is by a composite teeth roller box and feed pump, preposition for the embodiment and embodiment 7
Pump is connected.Remaining is consistent, and here is omitted.
Embodiment 9
As shown in figure 9, a kind of another specific embodiment of Generalized Conversion system with fore pump of the present utility model, it is wrapped
Include feed pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5, forward clutch 6, reverse clutch 4, adjustable frequency motor 7, increasing
Fast gear-box 2 and reduction gear box 10.As unit load changes, corresponding regulation（Change）Into the steam parameter of the steam turbine
And the amount of drawing gas, make the turbine speed respective change, so as on the one hand change feed pump and fore pump turn indirectly by gear-box
Speed, on the other hand directly changes the frequency of the alternating current of generator output.
Compared with Example 7, the embodiment installs a forward clutch 6 additional between adjustable frequency motor and generator.Cause
This adjustable frequency motor is after completion frequency conversion generator puts into operation, it is not necessary to which system for tracking is operated, and remaining is consistent with embodiment 7, herein not
Repeat again.
Embodiment 10
As shown in Figure 10, the another specific embodiment of a kind of Generalized Conversion system with fore pump of the present utility model, it
Including feed pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5, forward clutch 6, reverse clutch 4, adjustable frequency motor 7,
Composite teeth roller box 9.As unit load changes, corresponding regulation（Change）Into the steam parameter of the steam turbine and the amount of drawing gas, make
The turbine speed respective change, so as on the one hand change feed pump and preposition revolution speed indirectly by gear-box, on the other hand
Directly change the frequency of the alternating current of generator output.
Compared with Example 8, difference is to have installed a forward clutch 6 between adjustable frequency motor and generator additional.With
Embodiment 9 is compared, and difference is that steam turbine is to be connected by a composite teeth roller box with feed pump, fore pump.Remaining is consistent,
Here is omitted.
Embodiment 11
As shown in figure 11, the another specific embodiment of a kind of Generalized Conversion system with fore pump of the present utility model, it
Including feed pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5, step-up gear 2 and reduction gear box 10.As unit is negative
Lotus changes, corresponding regulation（Change）Into the steam parameter of the steam turbine and the amount of drawing gas, make the turbine speed respective change, from
And on the one hand change feed pump and preposition revolution speed indirectly by gear-box, on the other hand directly change the exchange of generator output
The frequency of electricity.
The embodiment does not set independent exciter, but uses " separate excitation mode ", and is not provided with any clutch system,
Do not possess online cut-out generator function thus, but simple system, invest relatively few.
Embodiment 12
As shown in figure 12, the another specific embodiment of a kind of Generalized Conversion system with fore pump of the present utility model, it
Including feed pump 1, fore pump 8, steam turbine 3, frequency conversion generator 5 and with composite teeth roller box 9.As unit load changes, accordingly
Regulation（Change）Into the steam parameter of the steam turbine and the amount of drawing gas, make the turbine speed respective change, so that on the one hand logical
Cross gear-box and change feed pump and preposition revolution speed indirectly, on the other hand directly change the frequency of the alternating current of generator output.
The embodiment does not set independent exciter equally yet, but uses " separate excitation mode ", and be also not provided with it is any from
Clutch system, thus do not possess online cut-out generator function, the difference with embodiment 11 is that steam turbine is multiple by one
Gear-box is closed to be connected with feed pump, fore pump.Remaining is consistent, and here is omitted.
Specific embodiment of the utility model described in detail above.It should be appreciated that the ordinary skill of this area is without wound
The property made work just can make many modifications and variations according to design of the present utility model.Therefore, all technologies in the art
Personnel can be obtained by logical analysis, reasoning, or a limited experiment on the basis of existing technology according to design of the present utility model
The technical scheme arrived, all should be in the protection domain being defined in the patent claims.
Claims (8)
1. a kind of Generalized Conversion system with fore pump, it at least includes the adjustable steam turbine of rotating speed, feed pump, fore pump, tooth
Roller box and frequency conversion generator, it is characterised in that the steam turbine drives the feed pump and described simultaneously by the gear-box
Fore pump, the steam turbine is connected with the generator, drags the electrical power generators.
2. the Generalized Conversion system with fore pump as claimed in claim 1, it is characterised in that the steam turbine with it is described preposition
The gear-box between pump, the feed pump is a composite teeth roller box, and the feed pump connects with the fore pump to be in parallel
Connect.
3. the Generalized Conversion system as claimed in claim 1 with fore pump, it is characterised in that the steam turbine and the feedwater
Pump is connected in series by a step-up gear, and the feed pump and the fore pump are connected company by a reduction gear box
Connect.
4. the Generalized Conversion system as claimed in claim 2 or claim 3 with fore pump, it is characterised in that also including reverse clutch
And adjustable frequency motor, the reverse clutch is arranged between the steam turbine and the frequency conversion generator, the variable-frequency electric
Machine is connected with the frequency conversion generator.
5. the Generalized Conversion system as claimed in claim 4 with fore pump, it is characterised in that also including forward clutch, institute
Forward clutch is stated to be arranged between the adjustable frequency motor and the frequency conversion generator.
6. the Generalized Conversion system with fore pump as any one of claim 1-3, it is characterised in that also including excitation
Machine, the exciter is connected with the frequency conversion generator.
7. the Generalized Conversion system as claimed in claim 4 with fore pump, it is characterised in that described to encourage also including exciter
Magnetomechanical is arranged between the adjustable frequency motor and the frequency conversion generator.
8. the Generalized Conversion system as claimed in claim 5 with fore pump, it is characterised in that described to encourage also including exciter
Magnetomechanical is arranged between the forward clutch and the frequency conversion generator.
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| CN201720225471.1U CN206506411U (en) | 2017-03-09 | 2017-03-09 | A kind of Generalized Conversion system with fore pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106655625A (en) * | 2017-03-09 | 2017-05-10 | 上海申能电力科技有限公司 | Generalized frequency conversion system with forepump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106655625A (en) * | 2017-03-09 | 2017-05-10 | 上海申能电力科技有限公司 | Generalized frequency conversion system with forepump |
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