CN108443153A - A kind of desulfurization roots blower speed regulation device and speed regulating method - Google Patents
A kind of desulfurization roots blower speed regulation device and speed regulating method Download PDFInfo
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- CN108443153A CN108443153A CN201810458358.7A CN201810458358A CN108443153A CN 108443153 A CN108443153 A CN 108443153A CN 201810458358 A CN201810458358 A CN 201810458358A CN 108443153 A CN108443153 A CN 108443153A
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- roots blower
- copper conductor
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 46
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 25
- 230000023556 desulfurization Effects 0.000 title claims abstract description 22
- 230000033228 biological regulation Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 76
- 229910052802 copper Inorganic materials 0.000 claims abstract description 76
- 239000010949 copper Substances 0.000 claims abstract description 76
- 239000004020 conductor Substances 0.000 claims abstract description 71
- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 230000001360 synchronised effect Effects 0.000 claims abstract description 20
- 230000008878 coupling Effects 0.000 claims abstract description 16
- 238000010168 coupling process Methods 0.000 claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 claims abstract description 16
- 239000000523 sample Substances 0.000 claims abstract description 11
- 230000009471 action Effects 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 20
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 10
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 claims description 3
- 235000010261 calcium sulphite Nutrition 0.000 claims description 3
- 239000004577 thatch Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/05—Speed
- F04C2270/051—Controlled or regulated
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a kind of desulfurization roots blower speed regulation devices, including the permanent magnet coupling speed regulator being connected between permanent-magnet synchronous variable-frequency motor and roots blower, including：The copper conductor rotor that is fixed on permanent-magnet synchronous variable-frequency motor output shaft, the PM rotor being fixed on roots blower input shaft, for adjusting the regulating mechanism of air gap thickness or engagement area between copper conductor rotor and PM rotor, and the speed-regulating driver for driving regulating mechanism；Roots blower is equipped with speed probe, and speed-regulating driver input terminal is connect with speed probe and host computer, and speed-regulating driver output end connect driving regulating mechanism action with regulating mechanism.The present invention also provides a kind of desulfurization speed regulating methods of roots blower speed regulation device.Beneficial effects of the present invention：Increased auxiliary facility is few, and it is not necessary that original desulphurization system is largely transformed, cost of investment is small, can realize the larger energy-saving effect of wind turbine, avoids the running energy waste of desulphurization system.
Description
Technical field
The present invention relates to technical field of desulfurization, in particular to a kind of desulfurization roots blower speed regulation device and speed governing
Method.
Background technology
Ensureing the operation of unit normally, stable simultaneously, needing to be optimized system structure, reduce the energy consumption of system,
Necessary measures to effectively increase energy savings and reduce material consumption are used in desulphurization system, to reduce the operating cost of desulphurization system, it will generate to a certain degree
On economic benefit and environmental effect.In entire desulphurization system, if desulfurizing agent is agstone, the power consumption of oxidation fan accounts for about
The 10% of desulphurization system；If desulfurizing agent is limestone block, the power consumption of oxidation fan accounts for about the 6~8% of desulphurization system, oxidation fan
Proportion of the power consumption in the power consumption of desulphurization system it is also relatively large, it is energy-saving to be of great significance.
Oxidation fan in desulphurization system is broadly divided into roots blower, Multi-stage centrifugal fan and single-stage high-speed centrifugal blower three
Kind form, the method for operation and control mode of wherein Multi-stage centrifugal fan and single-stage high-speed centrifugal blower are substantially the same, Roots
The operation of wind turbine and centrifugal blower differs.Roots blower belongs to positive displacement gas compressor, the air quantity of conveying and revolution at
Ratio.Its operation principle is：By two impellers (or three leaves), negative direction at the uniform velocity rotates each other in babinet, makes babinet and impeller institute
A certain amount of gas surrounded is transported to the side of discharge by the side sucked.Roots blower is mainly characterized by：1) leaf
Wheel and axis are overall structure, and impeller, without abrasion, fan performance is sustained, can continuously run for a long time；2) there is hard exhaust
Characteristic, when pressure change, changes in flow rate very little, within the scope of design pressure, its changes in flow rate very little when resistance of pipe system changes is fitted
The workplace that resistance amplitude of variation is larger for stable in traffic requirement；3) since Roots blower is deposited during the work time
In surging, cause Roots blower noise higher, strong influence can be brought to ambient enviroment.
Desulfurization at present is stationary state operation with roots blower, and scene will not be with unit load and the practical feelings at scene
Condition is adjusted correspondingly operation, and the method for operation is in unit compared with large load operation or desulphurization system inlet flue gas parameter and design
Operating condition is suitable when matching, and easily occurs larger energy waste in actual motion.In order to ensure desulphurization system safety, economy
Operation, desulfurization roots blower are adjusted with the operating load of unit, the variation needs of Gas Parameters.The prior art is in oxygen
Change wind turbine reuse transformation when, increase frequency converter, can realize economize on electricity 30% or so, although power savings are apparent, need to increase
Transducer Room and its auxiliary facility, reforming content is relatively more, and investment is also relatively large.Meanwhile existing oxidation fan institute distribution
Machine is asynchronous motor, although its is stable, failure rate is low, and from the point of view of Energy Angle, asynchronous motor can not embody
Energy-saving effect.
Invention content
To solve the above problems, the purpose of the present invention is to provide a kind of desulfurization roots blower speed regulation devices and speed governing side
Preferable energy-saving effect can be realized without increasing frequency conversion room in method.
The present invention provides a kind of desulfurization roots blower speed regulation devices, including are connected to permanent-magnet synchronous variable-frequency motor and sieve
Permanent magnet coupling speed regulator between thatch wind turbine, the permanent magnet coupling speed regulator include：It is fixed on the permanent-magnet synchronous variable-frequency motor
Copper conductor rotor on output shaft, the PM rotor being fixed on the roots blower input shaft are led for adjusting the copper
The regulating mechanism of air gap thickness or engagement area between body rotor and the PM rotor, and for driving the adjusting
The speed-regulating driver of mechanism；
Be provided with speed probe on the roots blower, the speed-regulating driver input terminal and the speed probe and
Host computer connects, and the speed-regulating driver output end connect the driving regulating mechanism action with the regulating mechanism；
Wherein, the roots blower is used to oxidation air being delivered in desulfuration absorbing tower and forces to aoxidize by calcium sulfite,
The permanent-magnet synchronous variable-frequency motor is matched with the roots blower.
As further improvement of the invention, the copper conductor rotor and the PM rotor are disc rotor.
As further improvement of the invention, the regulating mechanism is for adjusting the copper conductor rotor and the permanent magnet
Air gap thickness between rotor.
As further improvement of the invention, the copper conductor rotor and the PM rotor are cylindrical rotor.
As further improvement of the invention, the regulating mechanism is for adjusting the copper conductor rotor and the permanent magnet
Engagement area between rotor.
The present invention also provides a kind of desulfurization speed regulating methods of roots blower speed regulation device, include the following steps：
Step 1, host computer calculates the theoretical rotational speed of roots blower according to the flow of oxidation wind needed for desulphurization system；
Step 2, the speed probe on the roots blower obtains the current rotating speed of the roots blower, and host computer combines
Theoretical rotational speed in step 1 obtains the required adjustment rotating speed of the roots blower；
Step 3, which is converted by the speed-regulating driver according to the adjustment signal of the adjustment rotating speed received
The regulating mechanism is driven to act after current signal, the regulating mechanism adjusting is fixed on permanent-magnet synchronous variable-frequency motor output shaft
Copper conductor rotor and the PM rotor being fixed on the roots blower input shaft between air gap thickness or engagement area,
Change the transmission torque between the copper conductor rotor and the PM rotor, the output to change the roots blower turns
Speed.
It is further improved as of the invention, in step 3：When the adjustment rotating speed is to reduce rotating speed, the speed governing is driven
Dynamic device drives the regulating mechanism to increase the air gap thickness between the copper conductor rotor and the PM rotor, and the copper is led
Body rotor passes through the magnetic line of force quantity of the copper conductor rotor to reduce far from the PM rotor, and induced field becomes smaller, this
When, the transmission torque between the copper conductor rotor and the PM rotor becomes smaller, and the output rotating speed of the roots blower becomes
It is small；
When the adjustment rotating speed is to increase rotating speed, the speed-regulating driver drives the regulating mechanism to reduce the copper and leads
Air gap thickness between body rotor and the PM rotor, the copper conductor rotor is closer apart from the PM rotor, wears
The magnetic line of force quantity for crossing the copper conductor rotor increases, and induced field becomes larger, at this point, the copper conductor rotor and the permanent magnet
Transmission torque between rotor becomes larger, and the output rotating speed of the roots blower becomes larger.
It is further improved as of the invention, in step 3：When the adjustment rotating speed is to reduce rotating speed, the speed governing is driven
Dynamic device drives the regulating mechanism to reduce the engagement area between the copper conductor rotor and the PM rotor, acts on institute
The magnetic line of force quantity for stating copper conductor rotor reduces, and induced field becomes smaller, at this point, the copper conductor rotor and the PM rotor
Between transmission torque become smaller, the output rotating speed of the roots blower becomes smaller；
When the adjustment rotating speed is to increase rotating speed, the speed-regulating driver drives the regulating mechanism to increase the copper and leads
Engagement area between body rotor and the PM rotor, the magnetic line of force quantity for acting on the copper conductor rotor increase, sense
Magnetic field is answered to become larger, at this point, the transmission torque between the copper conductor rotor and the PM rotor becomes larger, the roots blower
Output rotating speed become larger.
Beneficial effects of the present invention are：
1, roots blower can realize 0~25% it is energy saving, it is even more；
2, the startup of roots blower can gradually be run, and avoided the unexpected startup and stopping at scene, can preferably be protected
Equipment increases equipment and its service life of parts, reduces site examining and repairing maintenance and maintenance cost；
3, permanent magnet coupling speed regulator is that machine components reduce subsequent operation and maintenance cost without other accessories；
4, the operation conditions for the wind turbine that scene can be adjusted according to the practical operation situation of unit, reduces the waste of equipment,
Reduce the operating cost at scene.
Description of the drawings
Fig. 1 is a kind of schematic diagram of desulfurization roots blower speed regulation device described in the embodiment of the present invention.
In figure,
1, permanent-magnet synchronous variable-frequency motor；2, permanent magnet coupling speed regulator；3, roots blower.
Specific implementation mode
It is described in further detail below by specific embodiment and in conjunction with attached drawing to the present invention.
Embodiment 1, as shown in Figure 1, a kind of desulfurization roots blower speed regulation device of the embodiment of the present invention, feature exist
In, including the permanent magnet coupling speed regulator 2 that is connected between permanent-magnet synchronous variable-frequency motor 1 and roots blower 3, permanent magnet coupling speed regulator
2 include：The copper conductor rotor that is fixed on 1 output shaft of permanent-magnet synchronous variable-frequency motor is fixed on 3 input shaft of roots blower forever
Magnet rotor, for adjusting the regulating mechanism of air gap thickness or engagement area between copper conductor rotor and PM rotor, with
And the speed-regulating driver for driving regulating mechanism；
Speed probe is provided on roots blower 3, speed-regulating driver input terminal is connect with speed probe and host computer,
Speed-regulating driver output end connect driving regulating mechanism action with regulating mechanism；
Roots blower 3 is used to oxidation air being delivered in desulfuration absorbing tower and forces to aoxidize by calcium sulfite, permanent-magnet synchronous
Variable-frequency motor 1 is matched with roots blower 3.
Matching used asynchronous machine is replaced with permanent-magnet synchronous variable-frequency motor by the present invention, is had the characteristics that：
(1) having the characteristics that high efficiency, high energy conservation economic operation characteristic range, wide (when being supported on 25~120%, efficiency can
Up to 95% or more), such as when load factor is 50%, the efficiency of asynchronous machine drops to 89%, and permanent-magnet synchronous frequency conversion still can be with
Keep 95% it is efficient.
(2) have the characteristics that high start torque, high embedded torque, exceed loading capability, high power density so that is same in permanent magnetism
When walking frequency conversion and frequency converter or being used cooperatively with permanent-magnet synchronous variable frequency soft starter, it can be substantially reduced according to practical shaft power
The installed capacity of device drives motor reduces the no-load loss of motor.
(3) has the characteristics that High Power Factor (power factor is up to 98% or more) so that no longer need to carry in power supply system
For idle, reactive power compensator is eliminated, equipment investment and fault point are reduced.Simultaneously because active and reactive electric current is big
Width declines (than declining 30% with capacity asynchronous motor) so that all service cable sections, supply transformer, are opened mother's board in cabinet
The capacity such as pass can all reduce, and while reducing equipment investment, reduce the loss of transformer and transmission line of electricity.
(4) have the characteristics that high reliability, high interchangeability, i.e., have identical seat No. with the asynchronous machine of same capacity and go out
Line mode so that it is very simple and convenient that asynchronous machine is replaced in permanent-magnet synchronous frequency conversion.
Roots blower belongs to constant volume type rotary blower, is equivalent to constant-current source, and rotor is under certain rotating speed, when pressure rises
Change where applicable in the coverage of permission, flow almost stablize it is constant, according to the characteristic calculating formula of the flow of roots blower：
In formula, D is root diameter (m), and l is rotor length (m), and n is rotor speed (r/min), λvFor bulk coefficient, λv
=0.55~0.9.
As can be seen from the above equation, change the i.e. changeable flow of speed for the rotor being connect with roots blower.
After roots blower rotating speed changes, shaft power is just corresponding to be changed, and is calculated with following formula：
In formula, Δ P is roots blower inlet outlet pressure differential, ηv、ηmFor volumetric efficiency, machinery driving efficiency.
As can be seen from the above equation, the performance characteristics of roots blower are that the relationship of direct ratio, rotating speed are kept between rotating speed and flow
It is also proportional with power, selection best operating point may be implemented by changing rotating speed.Changing roots blower rotating speed can be real
The target for now selecting best operating point, rationally controls actual air volume, that is, uninterrupted, according to roots blower rotating speed and power at just
The rotating speed of the relationship of ratio, roots blower reduces, and roots blower needs the electrical power consumed also to decline, to realize roots blower
It is energy-saving.
Desk permanent-magnet coupled speed regulator and tubular permanent magnet coupling speed regulator can be used in the permanent magnet coupling speed regulator 2 of the present invention.
When using desk permanent-magnet coupled speed regulator, copper conductor rotor and PM rotor are disc rotor, at this point, adjusting
Section mechanism is used to adjust the air gap thickness between copper conductor rotor and PM rotor, and copper is adjusted by the variation of air gap thickness
Transmission torque between conductor rotor and PM rotor, to complete the adjusting of 3 rotating speed of roots blower.
When using tubular permanent magnet coupling speed regulator, copper conductor rotor and PM rotor are cylindrical rotor, at this point, adjusting
Mechanism is used to adjust the engagement area between copper conductor rotor and PM rotor, is led by the variation of engagement area to adjust copper
Transmission torque between body rotor and PM rotor, to complete the adjusting of 3 rotating speed of roots blower.
After desulfurization using the present invention roots blower speed regulation device, desulphurization system and the energy-saving situation table of oxidation fan
It is as follows：
From the results, it was seen that using this speed regulation device, wind turbine can realize 0~25% energy saving, even more, wind
The startup of machine can gradually be run, and avoided the unexpected startup and stopping at scene, can preferably be protected equipment, increase equipment and its
The service life of parts reduces site examining and repairing maintenance and maintenance cost.
A kind of embodiment 2, desulfurization speed regulating method of roots blower speed regulation device, includes the following steps：
Step 1, host computer calculates the theoretical rotational speed of roots blower 3 according to the flow of oxidation wind needed for desulphurization system；
Step 2, the speed probe on roots blower 3 obtains the current rotating speed of roots blower 3, host computer combination step 1
In theoretical rotational speed, obtain 3 required adjustment rotating speed of roots blower；
Step 3, which is converted into electric current by speed-regulating driver according to the adjustment signal of the adjustment rotating speed received
Regulating mechanism action, regulating mechanism is driven to adjust the copper conductor being fixed on 1 output shaft of permanent-magnet synchronous variable-frequency motor and turn after signal
Air gap thickness or engagement area between son and the PM rotor being fixed on 3 input shaft of roots blower change copper conductor and turn
Transmission torque between son and PM rotor, to change the output rotating speed of roots blower.
Desk permanent-magnet coupled speed regulator and tubular permanent magnet coupling speed regulator can be used in the permanent magnet coupling speed regulator 2 of the present invention.
When using desk permanent-magnet coupled speed regulator, copper conductor rotor and PM rotor are disc rotor, at this point,
Regulating mechanism is used to adjust the air gap thickness between copper conductor rotor and PM rotor, is adjusted by the variation of air gap thickness
Transmission torque between copper conductor rotor and PM rotor, to complete the adjusting of 3 rotating speed of roots blower.It is specific in step 3
Regulative mode be：
When it is to reduce rotating speed to adjust rotating speed, speed-regulating driver drives regulating mechanism to increase copper conductor rotor and permanent magnet turn
Air gap thickness between son, copper conductor rotor pass through the magnetic line of force quantity of copper conductor rotor to reduce, induction far from PM rotor
Magnetic field becomes smaller, at this point, the transmission torque between copper conductor rotor and PM rotor becomes smaller, the output rotating speed of roots blower becomes
It is small；
When it is to increase rotating speed to adjust rotating speed, speed-regulating driver drives regulating mechanism to reduce copper conductor rotor and permanent magnet turn
Air gap thickness between son, copper conductor rotor is closer apart from PM rotor, and the magnetic line of force quantity of copper conductor rotor is passed through to increase,
Induced field becomes larger, at this point, the transmission torque between copper conductor rotor and PM rotor becomes larger, the output rotating speed of roots blower
Become larger.
When using tubular permanent magnet coupling speed regulator, copper conductor rotor and PM rotor are cylindrical rotor, at this point, adjusting
Section mechanism is used to adjust the engagement area between copper conductor rotor and PM rotor, and copper is adjusted by the variation of engagement area
Transmission torque between conductor rotor and PM rotor, to complete the adjusting of 3 rotating speed of roots blower.It is specific in step 3
Regulative mode is：
When it is to reduce rotating speed to adjust rotating speed, speed-regulating driver drives regulating mechanism to reduce copper conductor rotor and permanent magnet turn
Engagement area between son, the magnetic line of force quantity for acting on copper conductor rotor reduce, and induced field becomes smaller, at this point, copper conductor turns
Transmission torque between son and PM rotor becomes smaller, and the output rotating speed of roots blower becomes smaller；
When it is to increase rotating speed to adjust rotating speed, speed-regulating driver drives regulating mechanism to increase copper conductor rotor and permanent magnet turn
Engagement area between son, the magnetic line of force quantity for acting on copper conductor rotor increase, and induced field becomes larger, at this point, copper conductor turns
Transmission torque between son and PM rotor becomes larger, and the output rotating speed of roots blower becomes larger.
The roots blower collocation permanent-magnet synchronous variable-frequency motor of inventive desulfurization, increased auxiliary facility is few, without to original
There is desulphurization system to be largely transformed, cost of investment is small, and uses permanent magnet coupling speed regulator speed governing, can realize that wind turbine is larger
Energy-saving effect avoids the running energy waste of desulphurization system.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of desulfurization roots blower speed regulation device, which is characterized in that including being connected to permanent-magnet synchronous variable-frequency motor (1) and sieve
Permanent magnet coupling speed regulator (2) between thatch wind turbine (3), the permanent magnet coupling speed regulator (2) include：It is fixed on the permanent-magnet synchronous
Copper conductor rotor on variable-frequency motor output shaft, the PM rotor being fixed on the roots blower input shaft, for adjusting
The regulating mechanism of air gap thickness or engagement area between the copper conductor rotor and the PM rotor, and for driving
The speed-regulating driver of the regulating mechanism；
Be provided with speed probe on the roots blower (3), the speed-regulating driver input terminal and the speed probe and
Host computer connects, and the speed-regulating driver output end connect the driving regulating mechanism action with the regulating mechanism；
Wherein, the roots blower (3) is used to oxidation air being delivered in desulfuration absorbing tower and forces to aoxidize by calcium sulfite, institute
Permanent-magnet synchronous variable-frequency motor (1) is stated to match with the roots blower (3).
2. desulfurization according to claim 1 roots blower speed regulation device, which is characterized in that the copper conductor rotor and institute
It is disc rotor to state PM rotor.
3. desulfurization according to claim 2 roots blower speed regulation device, which is characterized in that the regulating mechanism is for adjusting
Save the air gap thickness between the copper conductor rotor and the PM rotor.
4. desulfurization according to claim 1 roots blower speed regulation device, which is characterized in that the copper conductor rotor and institute
It is cylindrical rotor to state PM rotor.
5. desulfurization according to claim 4 roots blower speed regulation device, which is characterized in that the regulating mechanism is for adjusting
Save the engagement area between the copper conductor rotor and the PM rotor.
6. a kind of desulfurization speed regulating method of roots blower speed regulation device, which is characterized in that include the following steps：
Step 1, host computer calculates the theoretical rotational speed of roots blower (3) according to the flow of oxidation wind needed for desulphurization system；
Step 2, the speed probe on the roots blower (3) obtains the current rotating speed of the roots blower (3), host computer knot
The theoretical rotational speed in step 1 is closed, the required adjustment rotating speed of the roots blower (3) is obtained；
Step 3, which is converted into electric current by the speed-regulating driver according to the adjustment signal of the adjustment rotating speed received
The regulating mechanism is driven to act after signal, the regulating mechanism adjusting is fixed on permanent-magnet synchronous variable-frequency motor (1) output shaft
Copper conductor rotor and the PM rotor being fixed on the roots blower (3) input shaft between air gap thickness or the field of conjugate action
Product, changes the transmission torque between the copper conductor rotor and the PM rotor, to change the roots blower (3)
Export rotating speed.
7. speed regulating method according to claim 6, which is characterized in that in step 3：
When the adjustment rotating speed is to reduce rotating speed, the speed-regulating driver drives the regulating mechanism to increase the copper conductor turn
Air gap thickness between the sub and described PM rotor, the copper conductor rotor pass through the copper far from the PM rotor
The magnetic line of force quantity of conductor rotor reduces, and induced field becomes smaller, at this point, between the copper conductor rotor and the PM rotor
Transmission torque become smaller, the output rotating speed of the roots blower becomes smaller；
When the adjustment rotating speed is to increase rotating speed, the speed-regulating driver drives the regulating mechanism to reduce the copper conductor turn
Air gap thickness between the sub and described PM rotor, the copper conductor rotor is closer apart from the PM rotor, passes through institute
The magnetic line of force quantity for stating copper conductor rotor increases, and induced field becomes larger, at this point, the copper conductor rotor and the PM rotor
Between transmission torque become larger, the output rotating speed of the roots blower becomes larger.
8. speed regulating method according to claim 6, which is characterized in that in step 3：
When the adjustment rotating speed is to reduce rotating speed, the speed-regulating driver drives the regulating mechanism to reduce the copper conductor turn
Engagement area between the sub and described PM rotor, the magnetic line of force quantity for acting on the copper conductor rotor reduce, and incude magnetic
Become smaller, at this point, the transmission torque between the copper conductor rotor and the PM rotor becomes smaller, the roots blower it is defeated
Go out rotating speed to become smaller；
When the adjustment rotating speed is to increase rotating speed, the speed-regulating driver drives the regulating mechanism to increase the copper conductor turn
Engagement area between the sub and described PM rotor, the magnetic line of force quantity for acting on the copper conductor rotor increase, and incude magnetic
Become larger, at this point, the transmission torque between the copper conductor rotor and the PM rotor becomes larger, the roots blower it is defeated
Go out rotating speed to become larger.
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|---|---|---|---|
| CN201810458358.7A CN108443153A (en) | 2018-05-14 | 2018-05-14 | A kind of desulfurization roots blower speed regulation device and speed regulating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458358.7A CN108443153A (en) | 2018-05-14 | 2018-05-14 | A kind of desulfurization roots blower speed regulation device and speed regulating method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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