CN107676451A - The variable-frequency control technique of speed-increasing hydraulic coupler - Google Patents
The variable-frequency control technique of speed-increasing hydraulic coupler Download PDFInfo
- Publication number
- CN107676451A CN107676451A CN201711115181.2A CN201711115181A CN107676451A CN 107676451 A CN107676451 A CN 107676451A CN 201711115181 A CN201711115181 A CN 201711115181A CN 107676451 A CN107676451 A CN 107676451A
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- Prior art keywords
- speed
- hydraulic coupler
- increasing hydraulic
- frequency control
- fluid
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H41/00—Rotary fluid gearing of the hydrokinetic type
- F16H41/04—Combined pump-turbine units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H41/00—Rotary fluid gearing of the hydrokinetic type
- F16H41/24—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H41/00—Rotary fluid gearing of the hydrokinetic type
- F16H41/24—Details
- F16H41/30—Details relating to venting, lubrication, cooling, circulation of the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
- F16H47/06—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
A kind of variable-frequency control technique of speed-increasing hydraulic coupler, belongs to fluid-flywheel clutch technical field.The purpose of the present invention is not change speed-increasing hydraulic coupler overall structure, keeps speed-increasing hydraulic coupler overall structure motionless.Speed-increasing hydraulic coupler is transformed into the step-up gear connected by fluid coupling.This is the variable-frequency control technique of speed-increasing hydraulic coupler.The present invention theory innovation point be, under conditions of working oil chamber internal-filling liquid amount keeps maximum and load characteristic constant between acceleration type coupling device pump impeller and turbine, change fluid-flywheel clutch input speed, also input, the output characteristics of fluid-flywheel clutch are just changed, so as to reach the purpose of regulation fluid-flywheel clutch power output and rotating speed.Here it is the theoretical foundation of speed-increasing hydraulic coupler variable-frequency control technique transformation.The positive effect of the present invention is that solve speed-increasing hydraulic coupler to deviate declared working condition, and efficiency is low, and the drawbacks of high energy consumption, speed-increasing hydraulic coupler freguency control reform is realized by the present invention, reaches the purpose of economize on electricity 20%, for industry energy conservation consumption reduction service.
Description
Technical field
The invention belongs to fluid-flywheel clutch technical field.
Background technology
Power plant boiler electrically driven feed pump is mostly speed-increasing hydraulic coupler driving and speed governing.Speed-increasing hydraulic coupler
Main function one is speedup, second, speed governing.Its agent structure is substantially coupling device casing, speed increasing gear, the shaft-driven profit of input
Oil pump with work oil pump, electronic auxiliary oil pump, pump impeller, turbine, working oil chamber, scoop tube, speed adjusting gear, working oil path system,
Lubricant passage way system, fuel tank, working oil oil cooler, lubricating oil oil cooler, bitubular filter screen etc. form.
The speed regulating method of speed-increasing hydraulic coupler is volumetric speed control method.So-called volumetric speed control method（Scoop tube speed governing）Refer to liquid
Under conditions of couple clutch pump impeller rotating speed and load characteristic are all constant, change between coupling pump impeller and turbine in working oil chamber
Filling amount, the input-output characteristic of fluid-flywheel clutch is also just changed, so as to reach regulation fluid-flywheel clutch power output and turn
The purpose of speed, here it is fluid-flywheel clutch volumetric speed control method.Namely scoop tube speed regulation method.
Power transmission between motor and fore pump, fluid-flywheel clutch and feed pump is completed by shaft coupling.Acceleration type
The transfer mode of the power of fluid-flywheel clutch is that motor passes to speed-increasing hydraulic coupler with 1490r/min constant speed and inputted
Axle, pump impeller is transferred to by design speed through speed increasing gear speedup to pump, pump impeller is under the driving of pump impeller shaft with pump impeller design speed
Constant speed is run, and transmits power by working oil between pump impeller and turbine, the torque of motor passes to pump impeller, pump impeller by speed increasing gear
Accelerate working oil and pump impeller torque is converted into the kinetic energy of working oil, working oil promotes turbine rotation to convert kinetic energy into turbine
Torque dragging feedwater pump operation.Fluid-flywheel clutch power output and rotating speed are by the topping up between pump impeller and turbine in working oil chamber
Amount regulation, the filling amount of working oil chamber is controlled by adjusting scoop tube position.
Speed-increasing hydraulic coupler delivery efficiency is equal to rotating ratio.During rated output full-load run, acceleration type fluid coupling
Device operational efficiency highest, therefore speed-increasing hydraulic coupler is only applicable to full-load run operating mode.In-service generating set load is root
Need what is be scheduled according to power network, annual rate of load condensate is typically between 60~75%.The speed-increasing hydraulic coupler of in-service operation
Scoop tube aperture never reached 100% generally below 60%, and all the time away from 100%, often inefficient section is transported below 60%
OK.Fluid-flywheel clutch efficiency is in terms of 97.63%, and for the average aperture of scoop tube in terms of 60%, fluid-flywheel clutch operational efficiency only has 58.58%,
Its space of economizing on electricity is up to 39%.This traditional transmission technology of speed-increasing hydraulic coupler, under the conditions of full-load run is deviateed, efficiency is low,
High energy consumption, it is its maximum drawback.
The content of the invention
The purpose of the present invention is not change speed-increasing hydraulic coupler overall structure, keeps speed-increasing hydraulic coupler overall
Structure is motionless.Speed-increasing hydraulic coupler is transformed into the step-up gear connected by fluid coupling.This is acceleration type liquid
The variable-frequency control technique of couple clutch.
The theory innovation point of the present invention is that working oil chamber internal-filling liquid amount is kept most between acceleration type coupling device pump impeller and turbine
Under conditions of big and load characteristic is constant, changes fluid-flywheel clutch input speed, also just change inputting, being defeated for fluid-flywheel clutch
Go out characteristic, so as to reach the purpose of regulation fluid-flywheel clutch power output and rotating speed.Here it is speed-increasing hydraulic coupler frequency conversion
The theoretical foundation of speed adjusting technique transformation.
The present invention fundamentally changes fluid-flywheel clutch power transfer mode.Specifically speed-increasing hydraulic coupler is changed
Into the step-up gear connected by fluid coupling.It is maximum with turbine oil pocket oil-filled quantity that solution is to maintain pump impeller.
Scoop tube is fixed on 100%, and pump impeller is relatively fixed with turbine, and slip is minimum, efficiency highest, and now fluid-flywheel clutch is into fluid power
Shaft coupling.Speed-increasing hydraulic coupler is into the step-up gear connected by fluid coupling.Motor and primary cut-out
Between increase a frequency converter and its power frequency bypath system.Motor is passed through fluid power shaft coupling with frequency control way transmission power
The step-up gear of device connection, and then the step-up gear connected by fluid coupling transmits power to feed pump.
The core technology of the present invention is that speed-increasing hydraulic coupler is transformed into the speedup tooth connected by fluid coupling
Roller box.Also fluid-flywheel clutch is transformed into fluid coupling.A supporting high voltage variable between primary cut-out and motor
Frequency device, by changing frequency converter frequency, to realize the frequency control of the step-up gear input shaft connected by fluid coupling
Operation, realize that the frequency control of the step-up gear connected by fluid coupling is run, and then realize the change frequency modulation of feed pump
Speed operation.
The positive effect of the present invention is that solve speed-increasing hydraulic coupler to deviate declared working condition, and efficiency is low, the disadvantage of high energy consumption
End, speed-increasing hydraulic coupler freguency control reform is realized by the present invention, reaches the purpose of economize on electricity 20%, is dropped for industry energy conservation
Consumption service.
Brief description of the drawings
Fig. 1 is fore pump of the present invention, motor, speed-increasing hydraulic coupler, feed pump connection sketch；
Fig. 2 is speed-increasing hydraulic coupler structural representation of the present invention；
Fig. 3 is pump impeller and turbine structure schematic diagram inside speed-increasing hydraulic coupler of the present invention.
Embodiment
Speed-increasing hydraulic coupler is transformed into the step-up gear connected by fluid coupling.Embodiment is
Keep pump impeller maximum with oil-filled quantity in turbine oil pocket, slip is minimum, and efficiency highest, i.e. scoop tube are fixed on 100%.Now,
Pump impeller is relatively fixed with turbine, and fluid-flywheel clutch is into fluid coupling（Accompanying drawing three）.Speed-increasing hydraulic coupler is into passing through
The step-up gear of fluid coupling connection（Accompanying drawing two）.
The present invention is in embodiment【0012】On the basis of solution, between motor 2 and primary cut-out 6
Increase a frequency converter 7 and its power frequency bypath system 8, realize the frequency control of motor, realize and connected by fluid coupling
Step-up gear frequency control, and then realize the frequency control of feed pump.
Increase a frequency converter 7 and its power frequency bypath system 8, high-tension electricity between motor 2 and primary cut-out 6 of the present invention
Source 5 is connected with primary cut-out 6；The one end of motor 2 is connected with fore pump 1, and the input shaft 9 of the other end and step-up gear 3 connects
Connect, the rear end of step-up gear 3 is connected on feed pump 4；The aperture 100% of scoop tube 12 inside step-up gear 3, while speedup tooth
Liquid is full of in pump impeller 11 and turbine 12 inside roller box 3.
The present invention is described in further detail below：
The theory innovation point of the present invention is, between acceleration type coupling device pump impeller and turbine working oil chamber internal-filling liquid amount keep it is maximum and
Under conditions of load characteristic is constant, change fluid-flywheel clutch input speed, input, the output for also just changing fluid-flywheel clutch are special
Property, so as to reach the purpose of regulation fluid-flywheel clutch power output and rotating speed.Here it is speed-increasing hydraulic coupler frequency control
The theoretical foundation of transformation.The blank of hydraulic power technology has been filled up in this theory innovation.Finish speed-increasing hydraulic coupler not
Speed-increasing hydraulic coupler and frequency converter use in conjunction energy-saving new century can have been started with the history of frequency converter connected applications
Member.
The present invention fundamentally changes fluid-flywheel clutch power transfer mode, refers to accompanying drawing one, accompanying drawing two, accompanying drawing three.
Speed-increasing hydraulic coupler is specifically passed through into fluid coupling instead（Accompanying drawing three）The step-up gear of connection（Accompanying drawing two）.Solution
Certainly scheme is to maintain pump impeller（The 10 of accompanying drawing two, three）With turbine（The 11 of accompanying drawing two, three）Working oil chamber oil-filled quantity is maximum（Accompanying drawing
2nd, three scoop tubes 12 are fixed on 100%）, pump impeller（The 10 of accompanying drawing two, three）With turbine（The 11 of accompanying drawing two, three）It is relatively fixed, slippage
Rate is minimum, efficiency highest, i.e. scoop tube（The 12 of accompanying drawing two, three）100% is fixed on, now fluid-flywheel clutch is into fluid coupling
（Accompanying drawing three）.Speed-increasing hydraulic coupler is into the step-up gear connected by fluid coupling（Accompanying drawing one 3, accompanying drawing
Two）.Increase a frequency converter between motor (the 2 of accompanying drawing one) and primary cut-out (the 6 of accompanying drawing one)（The 7 of accompanying drawing one）And its
Power frequency bypath system（The 8 of accompanying drawing one）, motor（The 2 of accompanying drawing one）Fluid power shaft coupling is passed through with frequency control way transmission power
The step-up gear of device connection（The 3 of accompanying drawing one）, and then the step-up gear connected by fluid coupling（The 3 of accompanying drawing one）Pass
Power is passed to feed pump（The 4 of accompanying drawing one）.
The core technology of the present invention is that speed-increasing hydraulic coupler is transformed into the speedup tooth connected by fluid coupling
Roller box（Accompanying drawing two）.Also fluid-flywheel clutch is transformed into fluid coupling（Accompanying drawing three）.In primary cut-out（The 6 of accompanying drawing one）
With motor（The 2 of accompanying drawing one）Between a supporting high voltage converter（The 7 of accompanying drawing one）, by changing frequency converter frequency, with reality
The step-up gear input shaft now connected by fluid coupling（The 9 of accompanying drawing one, accompanying drawing two）Frequency control operation, realize logical
Cross the step-up gear of fluid coupling connection（Accompanying drawing one 3, accompanying drawing two）Frequency control operation, and then realize feed pump
（The 4 of accompanying drawing one）Frequency control operation.
Working oil chamber internal-filling liquid amount keeps maximum between speed-increasing hydraulic coupler pump impeller and turbine and load characteristic is constant
Under conditions of, change speed-increasing hydraulic coupler input speed, input, the output for also just changing speed-increasing hydraulic coupler are special
Property, so as to reach the purpose of regulation speed-increasing hydraulic coupler power output and rotating speed.Under the guidance of this innovation theory：
Speed-increasing hydraulic coupler is transformed into the step-up gear connected by fluid coupling.Embodiment is to maintain
Pump impeller is maximum with oil-filled quantity in turbine oil pocket, and slip is minimum, and efficiency highest, i.e. scoop tube are fixed on 100%.Now, pump impeller
It is relatively fixed with turbine, fluid-flywheel clutch is into fluid coupling（Accompanying drawing three）.Speed-increasing hydraulic coupler is into passing through fluid power
The step-up gear of shaft coupling connection（Accompanying drawing two）.
A supporting high voltage converter and its power frequency bypath system between primary cut-out and motor, become by changing
Frequency device frequency, to realize that the frequency control of step-up gear that speed-increasing hydraulic coupler connected by fluid coupling is run,
And then realize the frequency control operation of feed pump.
Input shaft-driven grease pump, work oil pump（Accompanying drawing two）, the frequency control with input shaft frequency control operation
Operation, to keep lubrication pressure and work oil mass, by calculating and test, the minimum setpoint frequency of frequency converter is determined, is set electronic
Feed water pump group minimum operation rotating speed, and to ensure converting operation operating mode, lubrication pressure is in normal allowed band, it is ensured that converting operation
Operating mode, work oil mass meet the needs for transmitting power.
The startup oil pump that former electronic auxiliary oil pump is run as frequency control.Electronic auxiliary oil pump is automatically stopped（Lubricating oil
Pressure reaches setting value）Afterwards, by the motor minimum speed set through frequency converter, lubrication pressure is kept in allowed band.
The application of the present invention, it is on the basis of the same fluid-flywheel clutch power frequency constant speed input volumetric speed control method of operation
On；One frequency control input frequency control method of operation of increase, makes same fluid-flywheel clutch have volumetric speed control（Scoop tube is adjusted
Speed）With two kinds of methods of operation of frequency control.And two kinds of methods of operation can be with the work frequency conversion switch type fluid-flywheel clutch of switchover operation.
The present invention has been successfully applied to the near coal-mine Power Generation Corporation Ltd. in Tongliao Huo Lin rivers, No. 2 machines（600MW）1st, give for No. 2
In water pump speed-increasing hydraulic coupler freguency control reform.This application is present invention 600MW units electrically driven feed pump at home
Freguency control reform is initiated.Securely and reliably, convenient, flexible, economize on electricity is notable, and retrofit work amount is minimum, and the duration is most short, cost performance
Highest, investment payback time are most short.
It is characteristic of the invention that：
（1）Same fluid-flywheel clutch, there is power frequency constant speed（I.e. motor 1490r/min constant speed is run）Input, volumetric speed control
（Speed governing is carried out with scoop tube）When, it is the variable speed fluid coupling method of operation；Frequency control（Motor frequency change speed governing operation）It is defeated
Enter, be the step-up gear method of operation, two kinds of methods of operation can be standby mutual with switchover operation, a fortune one when scoop tube is fixed on 100%
For standby new and effective extraordinary transmission new technology.
（2）During frequency control, scoop tube is fixed on 100%, and pump impeller is fixed on optimal topping up with turbine oil pocket internal-filling liquid amount
Amount, slip is minimum, efficiency highest, and turbine turns into fluid coupling with pump impeller, is relatively fixed, plays shaft coupling, acceleration type
Fluid-flywheel clutch is now into the step-up gear connected by fluid coupling.
（3）In the range of frequency control, speed-increasing hydraulic coupler remains that speed-increasing hydraulic coupler passes through fluid power
The step-up gear method of operation of shaft coupling connection is constant, remains that permanent Effec-tive Function is constant.
（4）Two kinds of prime mover driven modes, the i.e. driving of power frequency constant speed and frequency control driving are adapted to, two kinds of type of drive can
Mutually to switch.The driving of power frequency constant speed corresponds to speed-increasing hydraulic coupler, and it is even that frequency control driving corresponds to acceleration type fluid power
The step-up gear that clutch is connected by fluid coupling.
（5）During full-load run, preferably inputted using power frequency constant speed（Volumetric speed control）Acceleration type fluid power occasionally run by meeting device mode；It is negative
Lotus rate preferably inputs the operation of the step-up gear method of operation 90% and when running below using frequency control.
The present invention is applied to 150MW 200MW 300MW 600MW Steam Turbine electrically driven feed pumps fluid-flywheel clutch and becomes frequency modulation
Fast technological transformation.Power saving rate is different with rate of load condensate after transformation, general up to 15~30%.
Claims (5)
- A kind of 1. variable-frequency control technique of speed-increasing hydraulic coupler, it is characterised in that：Speed-increasing hydraulic coupler pump impeller with Under conditions of working oil chamber internal-filling liquid amount keeps maximum and load characteristic constant between turbine, change speed-increasing hydraulic coupler input Rotating speed, input, the output characteristics of speed-increasing hydraulic coupler are also just changed, it is defeated so as to reach regulation speed-increasing hydraulic coupler Go out the purpose of power and rotating speed；This is the theoretical foundation of the present invention.
- 2. the variable-frequency control technique of speed-increasing hydraulic coupler according to claim 1, it is characterised in that：By acceleration type liquid Couple clutch is transformed into the step-up gear connected by fluid coupling；Embodiment is to maintain pump impeller and turbine Oil-filled quantity is maximum in oil pocket, and slip is minimum, and efficiency highest, i.e. scoop tube are fixed on 100%；Now, pump impeller is relative with turbine solid Fixed, fluid-flywheel clutch is into fluid coupling；Speed-increasing hydraulic coupler is into the speed increasing gear connected by fluid coupling Case.
- 3. the variable-frequency control technique of speed-increasing hydraulic coupler according to claim 1, it is characterised in that：In high pressure open circuit A supporting high voltage converter and its power frequency bypath system between device and motor；By changing frequency converter frequency, increased with realizing The frequency control operation for the step-up gear that fast type fluid-flywheel clutch is connected by fluid coupling, and then realize the change of feed pump Frequency speed governing operation.
- 4. the variable-frequency control technique of speed-increasing hydraulic coupler according to claim 1, it is characterised in that：Input shaft drives Grease pump, work oil pump, with input shaft frequency control operation frequency control run；To keep lubrication pressure and working oil Amount, by calculating and testing, the minimum setpoint frequency of frequency converter is determined, motor-driven feed-water pump set minimum operation rotating speed is set, to ensure Under converting operation operating mode, lubrication pressure is in normal allowed band, it is ensured that converting operation operating mode, work oil mass meet to transmit power Needs.
- 5. the variable-frequency control technique of speed-increasing hydraulic coupler according to claim 1, it is characterised in that：Former electronic auxiliary The startup oil pump that oil pump is run as frequency control；Electronic auxiliary oil pump is automatically stopped（Lubrication pressure reaches setting value）Afterwards, by The motor minimum speed set through frequency converter, lubrication pressure is kept in allowed band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711115181.2A CN107676451A (en) | 2017-11-13 | 2017-11-13 | The variable-frequency control technique of speed-increasing hydraulic coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711115181.2A CN107676451A (en) | 2017-11-13 | 2017-11-13 | The variable-frequency control technique of speed-increasing hydraulic coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107676451A true CN107676451A (en) | 2018-02-09 |
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ID=61146994
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711115181.2A Withdrawn CN107676451A (en) | 2017-11-13 | 2017-11-13 | The variable-frequency control technique of speed-increasing hydraulic coupler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413115A (en) * | 2020-10-14 | 2021-02-26 | 沈阳鼓风机集团自动控制系统工程有限公司 | Control method and device for auxiliary oil pump |
-
2017
- 2017-11-13 CN CN201711115181.2A patent/CN107676451A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112413115A (en) * | 2020-10-14 | 2021-02-26 | 沈阳鼓风机集团自动控制系统工程有限公司 | Control method and device for auxiliary oil pump |
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Application publication date: 20180209 |