CN201874795U - Frequency conversion speed regulation type hydraulic coupler electrically-driven feed pump - Google Patents
Frequency conversion speed regulation type hydraulic coupler electrically-driven feed pump Download PDFInfo
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- CN201874795U CN201874795U CN2010206402528U CN201020640252U CN201874795U CN 201874795 U CN201874795 U CN 201874795U CN 2010206402528 U CN2010206402528 U CN 2010206402528U CN 201020640252 U CN201020640252 U CN 201020640252U CN 201874795 U CN201874795 U CN 201874795U
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- hydraulic coupler
- pump
- speed regulation
- feed water
- motor
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Abstract
The utility model discloses a frequency conversion speed regulation type hydraulic coupler electrically-driven feed pump belonging to the field of water supply equipment. The utility model aims at providing a frequency conversion speed regulation type hydraulic coupler electrically-driven feed pump which achieves frequency conversion and speed regulation without changing the existing connection mode of a motor, a hydraulic coupler and a feed water pump group. The electrically-driven feed pump is mainly characterized in that a constant-speed output function of a hydraulic coupler is increased to be adapted to needs of frequency conversion and speed regulation transformation of a motor through the feed water pump group driven by the hydraulic coupler on the basis of maintaining speed regulation function of the hydraulic coupler through local transformation of the interior of the hydraulic coupler (that is a main oil pump driven by an input shaft of the hydraulic coupler is removed, and a tailor-made main oil pump which is matched with the hydraulic coupler and directly driven by an independent motor is arranged outside the hydraulic coupler to be connected with an outlet pipe of the original main oil pump for replacing the original main oil pump). In the utility model, a medium-voltage frequency converter matched with the feed water pump is arranged between a circuit breaker of the feed water pump and the motor of the feed water pump, so as to realize the frequency conversion and speed regulation of the electrically-driven feed pump. To ensure safety and reliability, a matched power frequency bypass system is arranged, the hydraulic coupler conducts constant-speed output during normal operation, and the frequency converter is used for speed regulation, so as to reduce unit consumption of the feed water pump; and when the frequency converter is in failure or overhauling, a power frequency bypass runs, and the hydraulic coupler is used for realizing speed regulation.
Description
Technical field
The utility model belongs to the water work field.
Background technique
The power station motor drives the major pant item of feed water pump as production process by speed regulation type hydrodynamic coupler, and its power consumption is very big, and feed water pump power consumption accounts for 2.5% of generated energy, account for nearly 30% of auxiliary power consumption rate of power plant, directly influence net coal consumption rate, influence cost of electricity-generating, influence energy consumption.Therefore to the mode of speed regulation of electrically driven feedpump, be badly in need of being optimized,, reduce the annual operating cost of electrically driven feedpump, reduce net coal consumption rate, thereby reduce the energy consumption (national requirements reduces by 20%) of production of units total value for reducing the year power consumption of electrically driven feedpump.Existing operating motor is carried out the frequency control of motor speed transformation by the feed water pump group that speed regulation type hydrodynamic coupler drives, and is very necessary.Hydraulic couplers speed governing electrically driven feedpump is typically equipped with front-mounted pump, and the feed water pump of band front-mounted pump generally should not directly change frequency control of motor speed (the unsuitable variable-speed operation of front-mounted pump) into.
Existing operating hydraulic couplers mainly is made up of two-part, and the one, step-up gear, the effect of this part is the rated speed motor, is increased to the running speed that satisfies the feed water pump declared working condition; The one, pump impeller, turbine, scoop tube and recycle oil system, its effect is to regulate recycle oil by scoop tube, changes the oil-filled amount of Coupler pump impeller, turbine, thereby regulates the stepless time adjustment that secondary speed is realized output speed.
Summary of the invention
The purpose of this utility model provides and does not a kind ofly change the Placement of existing motor, hydraulic couplers, feed water pump and reach the frequency control of motor speed type hydraulic couplers electrically driven feedpump of frequency control of motor speed.
The utility model is installed frequency variator between power circuit breaker and motor, motor reel is connected with the hydraulic couplers input shaft, driving gear of fixedlying connected and driven gear engagement with input shaft, driven gear is fixedlyed connected with pump impeller by axle, turbine drives feed water pump by output shaft, and oil pump supplies pressure oil by pipeline in pump impeller and turbine.
The utility model advantage is:
The feed water pump group that motor in the power-plant operation drives by hydraulic couplers, Placement is constant, by the local flow improvement inside and outside to hydraulic couplers, on the basis that keeps the hydraulic couplers speed-regulating function, increase the constant speed output function of hydraulic couplers, carry out the needs that frequency control of motor speed is transformed by the feed water pump group of hydraulic couplers driving to adapt to motor.
The speed-regulating function of hydraulic couplers is transformed into the constant speed output function, and just the electrically driven feedpump with the hydraulic couplers speed governing of energy success is transformed into the electrical variable frequency adjustable speed feed water pump.During the hydraulic couplers speed governing, Coupler output shaft rotating speed is along with the needs of feed water pump change.Require the output shaft of Coupler should be able to export the fixed rotating speed that satisfies the feed water pump declared working condition during frequency control of motor speed.Need not hydraulic couplers is replaced with step-up gear, (promptly remove by hydraulic couplers and import shaft-driven main oil pump by local flow improvement hydraulic couplers inside, a special supporting with it main oil pump that is directly driven by independent motor is installed in that hydraulic couplers is outside, be connected with former main oil pump outer pipe, the function that replaces former main oil pump), the speed-regulating function of hydraulic couplers is changed over the constant speed output function.
Between feed water pump circuit breaker and feed water pump motor, increase by one with the supporting medium voltage frequency converter of feed water pump, just can realize the frequency control of motor speed of electrically driven feedpump.Safe and reliable for guaranteeing, supporting power frequency bypath system, the output of hydraulic couplers constant speed is carried out speed governing by frequency variator when normally moving, to reduce the feed water pump unit consumption; When frequency converter failure or maintenance, power frequency bypass operation realizes speed governing by hydraulic couplers.
Can be applied on two feed water pumps.Its way is to increase a primary cut-out and two switching disconnecting links.Realize the frequency conversion one drag two method of operation by switching.Both be convenient to the regular switchover operation of feed water pump, be convenient to standby mutually again.Normal operating mode is the frequency control of motor speed pump operation, and the hydraulic couplers governor impeller is standby, and two pumps can regularly switch the frequency control of motor speed operation.
Description of drawings
Fig. 1 is the utility model general structure schematic representation;
Fig. 2 is the utility model schematic diagram.
Embodiment
The utility model is installed frequency variator 10 between power circuit breaker and motor 9, motor reel is connected with hydraulic couplers input shaft 2, driving gear 1 of fixedlying connected and driven gear 5 engagements with input shaft 2, driven gear 5 is fixedlyed connected with hydraulic couplers pump impeller 6 by axle 4, turbine 7 drives feed water pump by hydraulic couplers output shaft 8, and oil pump 3 supplies pressure oil by pipeline in hydraulic couplers pump impeller 6 and turbine 7.
Efficient speed change feed water pump is to the requirement of supporting frequency variator
High pressure water feeding pump for boiler as the Important Auxiliary equipment of power production process, has very high requirement to high voltage converter.Primary is that the requirement high voltage converter has very high reliability, mainly comprises:
1, the average failure-free operation hour number of frequency variator 〉=80000 hours
2, the adaptive capacity to voltage ripple of power network is strong, promptly can be in bigger voltage ripple of power network scope proper functioning.This scope generally is-30%～+ 10%.
3, directly high-voltage frequency-changing output, frequency variator efficient 〉=96%, power factor is more than 0.95.
4, should meet standard GB/T14549 GB/T 15543-1995 and IEEE519-1992 standard.Harmonics of Input ﹤ 4%, output voltage, current harmonics ﹤ 3%.
5, good output waveform, du/dt＜delicate common mode voltage＜500V of 1000 V/ does not exist and causes electric motor overheating and influence the motor Insulation Problems.Can use normal asynchronous, without limits to cable length.
6, speed adjustable range 0-100% adjusting speed accuracy 0.5%
7, start to time 15-30 second at full capacity.
8, frequency variator should have self-starting function.Should satisfy " thermal power plant station service designing technique regulation " fully to the self-starting requirement of 1 class motor, specifically comprises:
(1) satisfies minimum busbar voltage (65%) requirement.
(2) satisfy unloaded self-starting requirement.It is the self-starting that the standby power supply unloaded state forms when automatically dropping into the active section that loses power supply.
(3) satisfy decompression self-starting requirement, the accident low voltage that occurs suddenly promptly in service is when the self-starting that accident is eliminated, form when voltage recovers.
(4) satisfy on-load self-starting requirement, promptly standby power supply has been with part load, the self-starting that forms when dropping into the active section that loses power supply automatically again.
(5) satisfy under-voltage protection and move, promptly before the under-voltage protection action, finish self-starting in (9s-10s) requirement of the highest time limit of circuit breaker trip.Guarantee unit safety operation.
(6) self-starting process does not have disturbance, does not have and impacts, and is beneficial to station-service voltage and recovers.
The utility model has two kinds of implementations, the first keeps front-mounted pump, former hydraulic couplers electrically driven feedpump group is constant, to untie with the front-mounted pump and the main pump motor of main pump motor Driven by Coaxial, be equipped with one with the front-mounted pump power match directly drive motor, hydraulic couplers is carried out local flow improvement, make it have the constant speed output function; Its two be the cancellation front-mounted pump, select for use the band inducer efficient speed change feed water pump, the displacement main feed pump.The motor and the hydraulic couplers of former electrically driven feedpump group are constant, hydraulic couplers is made corresponding local flow improvement (remodeling method be me company's achievement in research) make the speed-regulating function of hydraulic couplers into the constant speed output function.Dual mode must be matched corresponding frequency variator.
Claims (1)
1. frequency control of motor speed type hydraulic couplers electrically driven feedpump, it is characterized in that: between power circuit breaker and motor (9), frequency variator (10) is installed, motor reel is connected with hydraulic couplers input shaft (2), driving gear (1) of fixedlying connected and driven gear (5) engagement with input shaft (2), driven gear (5) is fixedlyed connected with pump impeller (6) by axle (4), turbine (7) drives feed water pump by output shaft (8), and oil pump (3) supplies pressure oil by pipeline in pump impeller (6) and turbine (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206402528U CN201874795U (en) | 2010-12-03 | 2010-12-03 | Frequency conversion speed regulation type hydraulic coupler electrically-driven feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206402528U CN201874795U (en) | 2010-12-03 | 2010-12-03 | Frequency conversion speed regulation type hydraulic coupler electrically-driven feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201874795U true CN201874795U (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206402528U Expired - Lifetime CN201874795U (en) | 2010-12-03 | 2010-12-03 | Frequency conversion speed regulation type hydraulic coupler electrically-driven feed pump |
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| Country | Link |
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| CN (1) | CN201874795U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865232A (en) * | 2012-09-29 | 2013-01-09 | 张文海 | Energy saving system of electrically driven feed pump of power frequency-variable frequency switching type liquid coupling |
| CN102865348A (en) * | 2012-09-29 | 2013-01-09 | 张文海 | Power frequency-variable frequency switching type liquid coupling |
| CN102878092A (en) * | 2012-10-16 | 2013-01-16 | 章礼道 | Novel energy-saving and speed-regulation electric water feeding pump system |
| CN103388676A (en) * | 2013-07-29 | 2013-11-13 | 北京中唐电工程咨询有限公司 | Efficient coupling variable-frequency speed regulating system and speed regulating method |
| CN103867456A (en) * | 2012-12-12 | 2014-06-18 | 中广核工程有限公司 | Control system and control method for regulating rotation speed of electrically driven feed pump of nuclear power station |
| CN104764000A (en) * | 2014-01-03 | 2015-07-08 | 施耐德电气（中国）有限公司 | Boiler water feeding system and method |
| CN106357193A (en) * | 2016-10-19 | 2017-01-25 | 王义平 | Method for directly driving water feeding pump by combination of frequency converter and high-speed motor |
| CN113090543A (en) * | 2021-04-08 | 2021-07-09 | 西安热工研究院有限公司 | Indirect air cooling unit boiler electric feed water pump system based on double-fed system |
-
2010
- 2010-12-03 CN CN2010206402528U patent/CN201874795U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865232A (en) * | 2012-09-29 | 2013-01-09 | 张文海 | Energy saving system of electrically driven feed pump of power frequency-variable frequency switching type liquid coupling |
| CN102865348A (en) * | 2012-09-29 | 2013-01-09 | 张文海 | Power frequency-variable frequency switching type liquid coupling |
| CN102878092A (en) * | 2012-10-16 | 2013-01-16 | 章礼道 | Novel energy-saving and speed-regulation electric water feeding pump system |
| CN102878092B (en) * | 2012-10-16 | 2015-04-08 | 章礼道 | Novel energy-saving and speed-regulation electric water feeding pump system |
| CN103867456A (en) * | 2012-12-12 | 2014-06-18 | 中广核工程有限公司 | Control system and control method for regulating rotation speed of electrically driven feed pump of nuclear power station |
| CN103867456B (en) * | 2012-12-12 | 2018-05-01 | 中广核工程有限公司 | The control system and method for nuclear power station electrically driven feed pump rotational speed regulation |
| CN103388676A (en) * | 2013-07-29 | 2013-11-13 | 北京中唐电工程咨询有限公司 | Efficient coupling variable-frequency speed regulating system and speed regulating method |
| CN104764000A (en) * | 2014-01-03 | 2015-07-08 | 施耐德电气（中国）有限公司 | Boiler water feeding system and method |
| CN106357193A (en) * | 2016-10-19 | 2017-01-25 | 王义平 | Method for directly driving water feeding pump by combination of frequency converter and high-speed motor |
| CN113090543A (en) * | 2021-04-08 | 2021-07-09 | 西安热工研究院有限公司 | Indirect air cooling unit boiler electric feed water pump system based on double-fed system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHANG WENHAI Free format text: FORMER OWNER: CHANGCHUN ERA NEW MACHINARY AND ELECTRICITY TECHNOLOGY CO., LTD. Effective date: 20110929 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110929 Address after: 130022, 88 southeast Lake Road, Jilin, Changchun Patentee after: Zhang Wenhai Address before: 130022, 88 southeast Lake Road, Jilin, Changchun Patentee before: Changchun Era New Machinery and Electricity Technology Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: CHANGCHUN ERA NEW MACHINARY AND ELECTRICITY TECHNO Free format text: FORMER OWNER: ZHANG WENHAI Effective date: 20111209 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20111209 Address after: 130022, 88 southeast Lake Road, Jilin, Changchun Patentee after: Changchun Era New Machinery and Electricity Technology Co., Ltd. Address before: 130022, 88 southeast Lake Road, Jilin, Changchun Patentee before: Zhang Wenhai |