CN202493391U - Feed pump driving system - Google Patents
Feed pump driving system Download PDFInfo
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- CN202493391U CN202493391U CN2012204017722U CN201220401772U CN202493391U CN 202493391 U CN202493391 U CN 202493391U CN 2012204017722 U CN2012204017722 U CN 2012204017722U CN 201220401772 U CN201220401772 U CN 201220401772U CN 202493391 U CN202493391 U CN 202493391U
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 37
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 24
- 230000001012 protector Effects 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 83
- 239000003921 oil Substances 0.000 claims description 32
- 230000001133 acceleration Effects 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model discloses a feed pump driving system which comprises a frequency changer, a main motor, a frequency conversion differential protector, a hydraulic coupler and an independent hydraulic oil supply unit. The frequency changer is connected with a high-voltage power supply, the main motor is connected with the frequency changer, the frequency conversion differential protector is electrically connected with the main motor and carries out frequency conversion differential protection on the main motor, the main motor and the feed pump are respectively connected with the hydraulic coupler which drives the feed pump to rotate under the operation of the main motor, and the independent hydraulic oil supply unit supplies hydraulic oil to the hydraulic coupler. Accordingly, a frequency conversion mode is adopted to drive the feed pump, the operational cost of the system is lowered, and the safety of the main motor in the system is also improved.
Description
Technical field
The utility model relates to the water work field, particularly relates to a kind of improved system that is used for drive water pump.
Background technique
In the prior art, the power station motor is through the hydraulic couplers drive water pump.But, cause power consumption bigger thus, and the power consumption of feed water pump account for usually auxiliary power consumption rate of power plant 30% or bigger, and increased energy consumption.
In view of this; In existing loop or the system that is used for drive water pump; As shown in Figure 1; Proposed a kind ofly between circuit breaker K1 and main motor M, frequency variator FT to be set, thereby realized to the loop of whole drive water pump or the VFC of system, to reduce the operating cost of whole loop or system.But owing to introduced the cause of frequency variator FT, the short-circuit protection mechanism of the inside of main motor M is inoperative.Be that original power frequency differential protection lost efficacy, thereby be easy to cause the damage of main motor M, particularly especially true at the high capacity motor of the for example 2000kVA that is used for thermal power plant.
In addition; Owing to introduce the cause of frequency variator FT; The working speed of main motor M descends; Can supply with the phenomenon that is short of power of hydraulic oil thus by the original main oil pump PO among the hydraulic couplers HC of main motor driving, when hydraulic couplers HC drive water pump PF, possibly damage this hydraulic couplers HC thus, thereby cause factory's human element accident.
In addition, in having the feed water pump of front-mounted pump, owing to front-mounted pump drives with main motor M through main pump usually, thus when frequency variator FT frequency conversion, because main motor M also can cause front-mounted pump cisco unity malfunction sometimes.
The model utility content
The utility model is intended to solve at least one of technical problem that exists in the existing technology.
For this reason, the utility model need provide a kind of system that is used for drive water pump, and said system not only can reduce operating cost, and can improve the Security of whole system.
The system that is used for drive water pump according to the embodiment of the utility model comprises: frequency variator, and said frequency variator is connected to high-voltage power through circuit breaker; Main motor, said main motor is electrically connected with said frequency variator; The frequency conversion differential protector, said frequency conversion differential protector is connected with said main motor and said main motor is carried out the frequency conversion differential protection; Hydraulic couplers, said hydraulic couplers link to each other with said feed water pump with said main motor respectively, and under the operation of said main motor, drive said feed water pump rotation; And independent hydraulically controlled oily feed unit, said hydraulic oil feed unit is supplied to said hydraulic couplers with hydraulic oil.Thus, adopt the mode of frequency conversion to come drive water pump, not only reduced the cost of system's operation, and the Security that has improved main motor in this system.
In addition, the system that is used for drive water pump according to the utility model also has following additional technical feature:
According to an embodiment of the utility model, said independent hydraulically controlled oily feed unit comprises: first main oil pump, and said first main oil pump is dragged by first motor and supplies with said hydraulic oil to said hydraulic couplers; And subsequent use main oil pump, said subsequent use main oil pump is dragged by second motor and when first main oil pump breaks down, supplies with said hydraulic oil to said hydraulic couplers.
Thus, through transforming the oil supply system of existing hydraulic couplers, supply with the phenomenon that is short of power thereby can reduce because introduce the hydraulic oil that frequency variator caused.In addition, through the mode of the using and the reserved, improved the Security and the continuity of whole system operation.
According to an embodiment of the utility model, said frequency conversion differential protector is the self balancing differential relay, and said self balancing differential relay is installed in the terminal box of said main motor.Thus, under the simple situation of protection wiring, obtain sensitive result, and the protection main motor can not damaged by short circuit current.
According to an embodiment of the utility model, said hydraulic couplers is the acceleration type hydraulic couplers.
According to an embodiment of the utility model, said system also comprises: power frequency Bypass Control unit, the parallelly connected setting with said frequency variator in said power frequency Bypass Control unit; And selector switch, said selector switch is electrically connected one in said main motor and said power frequency Bypass Control unit and the said frequency variator.
According to an embodiment of the utility model, when said selector switch is electrically connected said driving motor with said frequency variator, come said driving motor is carried out speed governing, to control the driving of said feed water pump through the frequency conversion of controlling said frequency variator; And when said selector switch is electrically connected said driving motor with said power frequency Bypass Control unit, through said hydraulic couplers is carried out the driving that said feed water pump is controlled in speed governing.
According to an embodiment of the utility model, said hydraulic couplers comprises: input shaft, and said input shaft links to each other with the output shaft of said main motor; Driving gear, said driving gear is fixedly connected with said input shaft; Driven gear, said driven gear and the engagement of said driving gear; Pump impeller, said pump impeller is fixedly connected with said driven gear; And turbine, said turbine drives said feed water pump through output shaft, and wherein said first main oil pump or said subsequent use main oil pump are supplied to said pump impeller and said turbine with said hydraulic oil.
According to an embodiment of the utility model, said system also comprises: front-mounted pump, said front-mounted pump links to each other with the import of said feed water pump and is dragged by three-motor.
An embodiment according to the utility model; Said system can comprise a plurality of main motors, a plurality of feed water pump; A plurality of frequency conversion differential protectors and a plurality of hydraulic couplers; Each said main motor links to each other with the frequency conversion differential protector with corresponding hydraulic couplers respectively, and said hydraulic couplers drives in the said feed water pump respectively, and in said frequency variator and the said a plurality of main motors one links to each other.
The utility model can be applied to one of frequency variator and drags in many systems thus, thereby improves the utilization ratio of frequency variator.
According to an embodiment of the utility model, said independent hydraulically controlled oily feed unit is supplied to each hydraulic couplers with hydraulic oil.
Additional aspect of the utility model and advantage part in the following description provide, and part will become obviously from the following description, or recognize through the practice of the utility model.
Description of drawings
Above-mentioned and/or additional aspect of the utility model and advantage obviously with are easily understood becoming embodiment's the description from combining figs, wherein:
Fig. 1 is the structural representation that is used for the system of drive water pump according to existing;
Fig. 2 is the structural representation according to a system embodiment, that be used for drive water pump of the utility model;
Fig. 3 is the use schematic representation according to the self balancing differential relay of a system embodiment, that be used for drive water pump of the utility model;
Fig. 4 is the structural representation according to an embodiment's of the utility model hydraulic couplers; And
Fig. 5 is the structural representation that has shown according to system another one embodiment, that be used for drive water pump of the utility model.
Embodiment
Describe the embodiment of the utility model below in detail, said embodiment's example is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment who is described with reference to the drawings below, only be used to explain the utility model, and can not be interpreted as restriction the utility model.
In the description of the utility model; It will be appreciated that; The orientation of indications such as term " " center ", " vertically ", " laterally ", " on ", D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", " outward " or position relation are for based on orientation shown in the drawings or position relation; only be to describe with simplifying for the ease of describing the utility model; rather than the device or the element of indication or hint indication must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction to the utility model.In addition, term " first ", " second " only are used to describe purpose, and can not be interpreted as indication or hint relative importance.In addition, in the description of the utility model, except as otherwise noted, the implication of " a plurality of " is two or more.
In the description of the utility model, need to prove that only if clear and definite regulation and qualification are arranged in addition, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be to be fixedly connected, also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly through intermediary, can be the connection of two element internals.For those of ordinary skill in the art, can concrete condition understand the concrete implication of above-mentioned term in the utility model.
Hereinafter the different structure that provides many various embodiment or example to be used for realizing the utility model disclosed.In order to simplify disclosing of the utility model, hereinafter the parts and the setting of specific examples are described.Certainly, they only are example, and purpose does not lie in restriction the utility model.In addition, the utility model can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself not indicate the relation between various embodiments that discuss of institute and/or the setting.In addition, various specific technology and examples of material that the utility model provides, but those of ordinary skills can recognize the use of the applicability and/or the other materials of other technologies.
Come the detailed system that is used for drive water pump 100 according to the utility model with reference to accompanying drawing below, wherein Fig. 2 is the structural representation according to the system 100 embodiment, that be used for drive water pump of the utility model.
As shown in Figure 2, this system 100 comprises frequency variator FT, main motor M, frequency conversion differential protector DP, hydraulic couplers HC, feed water pump PF, independent hydraulically controlled oily feed unit.Said frequency variator FT is connected to high-voltage power 1 through circuit breaker K1, and according to an embodiment of the utility model, this high-voltage power 1 can be industrial high-voltage power.Main motor M is electrically connected with frequency variator FT.Owing between high-voltage power 1 and main motor M, be provided with frequency variator FT, thereby can operate the power consumption that reduces feed water pump PF, improve the power consumption efficiency of whole system 100 through frequency conversion.According to an embodiment of the utility model, this frequency variator FT can be medium voltage frequency converter.
According to an embodiment of the utility model, frequency conversion differential protector DP is connected with main motor M and said main motor M is carried out the frequency conversion differential protection.In the prior electric machine; Particularly high-tension motor is worked as capacity more than 2000kW reaches; Though or capacity needs differential protection less than the motor of 2000kw; But the differential protection mechanism in the prior electric machine is only effective to power frequency, and when frequency shift, the differential protection mechanism in the prior electric machine can not effectively work.
In view of this, in the utility model, adopted frequency conversion differential protector DP.According to an embodiment of the utility model, for example said frequency conversion differential protector DP can be the self balancing differential relay, and this self balancing differential relay 2 can be installed in the terminal box (not shown) of main motor M.Self balancing differential relay 2 is through the work of magnetic flux principle for balance, and for example when motor interior broke down, fault current can destroy self balancing differential relay 2 magnetic flux balances; Thereby the second side at electromagnetic induction produces electric current; When electric current reaches predetermined value, start self balancing differential relay 2, thereby the self balancing differential relay cuts off the power supply of this main motor M; Thereby reach the purpose to the protection of main motor M, K01 and K02 represent secondary connection in Fig. 3.Thus, under the simple situation of protection wiring, obtain sensitive result, and protection main motor M can not damaged by short circuit current.Thus, come under the situation of drive water pump, not only reduced the cost of system's operation in the mode that adopts frequency conversion, and the Security that has improved main motor M in this system.In addition, the power frequency differential protector in the existing main motor can correspondingly be removed.
As shown in Figure 2, hydraulic couplers HC links to each other with said feed water pump PF with said main motor M respectively, and under the operation of said main motor M, drives said feed water pump PF rotation.According to an embodiment of the utility model, as shown in Figure 4, said hydraulic couplers HC comprises: input shaft 3, and said input shaft 3 links to each other with the output shaft 4 of said main motor M; Driving gear 5, said driving gear 5 is fixedly connected with said input shaft 3; Driven gear 6, said driven gear 6 and said driving gear 5 engagements; Pump impeller 7, said pump impeller 7 is fixedly connected with said driven gear 6; And turbine 8, said turbine 8 drives said feed water pump M through output shaft 9.
According to an embodiment of the utility model, as stated, this system 100 also comprises independent hydraulically controlled oily feed unit, and said hydraulic oil feed unit is supplied to hydraulic couplers HC with hydraulic oil.Different with traditional design; This hydraulic pressure supply unit is independent of dragging of main motor; And individually hydraulic couplers HC is supplied with hydraulic oil, thereby overcome the not enough or discontinuous situation of first wife's main oil pump PO fuel feeding of hydraulic couplers HC traditional, that when main motor M speed changes, dragged.According to an embodiment of the utility model, as shown in Figure 2, this independent hydraulically controlled oily feed unit comprises: the first main oil pump PO1, and the said first main oil pump PO1 is dragged by the first motor M1 and supplies with said hydraulic oil to said hydraulic couplers HC; And subsequent use main oil pump PO2, said subsequent use main oil pump PO2 is dragged by the second motor M2 and when the first main oil pump PO1 breaks down, supplies with said hydraulic oil to said hydraulic couplers HC.The first main oil pump PO1 or said subsequent use main oil pump PO2 are supplied to pump impeller 7 and turbine 8 with said hydraulic oil.Need to prove that this independent hydraulically controlled oily feed unit can also comprise more a plurality of subsequent use main oil pumps and drive its motor respectively.
Thus, through transforming the oil supply system of existing hydraulic couplers, supply with the phenomenon that is short of power thereby can reduce the hydraulic oil that is caused because of introducing frequency variator FT.In addition, through the mode of the using and the reserved, the Security of whole system operation and the continuity of work have been improved.In addition; First wife's main oil pump PO that input shaft 3 through will being used for hydraulic couplers drives replaces to the main oil pump that the independent motor that outside hydraulic couplers, is provided with directly drags; And the speed-regulating function of hydraulic couplers HC is changed over the constant speed output function, thereby reduce the power consumption of feed water pump.
In addition, under above-mentioned situation, first wife's main oil pump PO set on the hydraulic couplers can be cut off or remove, shown in " X " between first wife's main oil pump PO among Fig. 2 and the hydraulic couplers HC.This first wife's main oil pump PO can keep, for subsequent use but in some cases.
According to an embodiment of the utility model, said system 100 also comprises: power frequency Bypass Control unit 9, said power frequency Bypass Control unit 9 and the parallelly connected setting of said frequency variator FT; Selector switch K2, said selector switch K2 is electrically connected one among main motor M and power frequency Bypass Control unit 9 and the frequency variator FT.Through selector switch K2 and supporting power frequency Bypass Control unit 9, when normal running, selector switch K2 is connected with frequency variator FT thus, and this moment, hydraulic couplers HC constant speed was exported, and came speed governing through frequency variator FT, to reduce the power consumption of feed water pump.Need to prove; " selector switch " here refers to any switch block that can select frequency variator FT and power frequency Bypass Control unit 9; For example this selector switch can be independent selector switch device, also can be that two or more independent switch combinations or any other can be realized any COMM communication that the selection of frequency variator FT and power frequency Bypass Control unit 9 is implemented.When frequency variator FT breaks down or need maintenance or other situations in the needs switching; Be connected with power frequency Bypass Control unit 9 through selector switch K2; Thereby make 9 operations of power frequency Bypass Control unit; Carry out speed governing by hydraulic couplers HC this moment, and the drive water pump running, guarantees the safety reliability of whole system 100 thus.
According to an embodiment of the utility model, said hydraulic couplers is the acceleration type hydraulic couplers.Thus, in the course of the work, when frequency variator FT proper functioning, hydraulic couplers HC can constant speed export, and when frequency variator FT breaks down, can directly carry out speed governing through hydraulic couplers HC, to drive the running of this feed water pump PF.
According to an embodiment of the utility model, when selector switch K2 is electrically connected driving motor M with frequency variator FT, come driving motor M is carried out speed governing, with the driving of control feed water pump PF through the frequency conversion of controlling said frequency variator FT.When selector switch K2 is electrically connected driving motor M with said power frequency Bypass Control unit 9, through hydraulic couplers HC is carried out the driving that this feed water pump PF is controlled in speed governing.
Fig. 5 has shown the structural representation according to another embodiment's of the utility model the system that is used for drive water pump.In Fig. 5, frequency variator FT has adopted 1 to drag 2 or 1 to drag many structures.To drag 2 simple in structure describing with 1 below.As shown in Figure 5, can comprise for example 2 a plurality of main motor M, a plurality of feed water pump PF, a plurality of frequency conversion differential protector DP and a plurality of hydraulic couplers HC in the system 100.Need to prove that each main motor M links to each other with frequency conversion differential protector DP with corresponding hydraulic couplers HC respectively.Need to prove, in Fig. 5, main motor M to all linkage structures between the feed water pump PF with aforementioned be identical or similar, thus its detailed description is omitted here.
As shown in Figure 5, hydraulic couplers HC drives corresponding feed water pump PF respectively, and among frequency variator FT and the said a plurality of main motor M one links to each other.In Fig. 5, the structure through diverter switch K11 as shown in the figure, K11 ', K12, K12 ', K13, K13 ' realizes that among frequency variator FT and two the main motor M links to each other.For example, diverter switch K11, K12 closure, K13 breaks off, and K11 ', K12 ' break off, K13 ' closure, thus realize that first feed water pump is a converting operation, second feed water pump is that power frequency is subsequent use.Alternatively, diverter switch K1, K2 can break off, and K3 is closed, K1 ', K2 ' closure, and K3 ' breaks off, and this moment, first feed water pump was that power frequency is subsequent use, and second feed water pump is converting operation.
The utility model can be applied to one of frequency variator FT and drags in many systems thus, thereby can switch to frequency variator in the feed-water pump of current operation, and improves the synchronous utilization ratio of frequency variator FT and other equipment.
According to an embodiment of the utility model, said independent hydraulically controlled oily feed unit is supplied to each hydraulic couplers with hydraulic oil.Overcome the not enough or discontinuous situation of first wife's main oil pump PO fuel feeding of hydraulic couplers HC traditional, that when main motor M speed changes, dragged thus.
In Fig. 5, under normal mode of operation, alternatively, the mode through frequency variator FT frequency conversion drives one of them feed water pump (not shown) and operates, and another feed water pump (not shown) is subsequent use.Equally alternatively, another feed water pump also can drive through the speed governing of hydraulic couplers HC, and this one of them feed water pump is subsequent use.In addition, can carry out regular switching between this first feed water pump and second feed water pump, to keep the consume of whole system 100 synchronously, so that the working life of whole system 100 is best.
In the present embodiment, frequency variator FT adopts the working method of one drag two, has both increased the regular switching of feed water pump, has also increased the Security of whole system, and is subsequent use each other.Under a kind of mode of operation according to the utility model, speed governing operation is carried out in the control through frequency variator FT in two feed water pumps.Under the another kind of mode of operation according to the utility model, another speed governing through hydraulic couplers that said frequency variator FT stops in frequency conversion and the said feed water pump moves.Realize the subsequent use and regular switching of these two pumps thus.
Further, according to an embodiment of the utility model, as shown in Figure 2, system 100 also comprises front-mounted pump PF2.Front-mounted pump PF2 links to each other with feed water pump PF and is dragged by three-motor M3.Front-mounted pump is used for improving the feed water pump inlet pressure, prevents that feed water pump PF is by cavitation.Because three-motor M3 drags front-mounted pump PF2 separately, overcome the problem of the front-mounted pump PF2 cisco unity malfunction that when frequency variator FT frequency conversion, causes in the existing technology thus owing to the decline of main motor M driving force.
Below with the working procedure of system 100 as shown in Figure 2, that be used for drive water pump under the simple declaration.
Under normal operation, frequency variator FT is electrically connected with main motor M through selector switch K2.At this moment, hydraulic couplers HC is set to maximum speed, through frequency variator FT frequency conversion drive motor is carried out speed governing operation; Then through after the speedup of this acceleration type hydraulic couplers; Drag feed water pump and move, at this moment, the output of this hydraulic couplers HC constant speed; This moment is because the effect of the frequency conversion of frequency variator FT, and makes the power consumption of whole system 100 greatly reduce.In said process, the frequency conversion differential protector DP provide the frequency conversion short-circuit protection to main motor M, prevents that main motor M from being damaged by short circuit current.
In case break down with the corresponding frequency variator of the operation of feed water pump or need switch the time, selector switch K2 is electrically connected power frequency Bypass Control unit 9 with main motor M.Thus, through speed governing, with control dragging to this feed water pump to hydraulic couplers HC.At this moment, the frequency variator FC that breaks down can shut-down operation, and whole system 100 is switched back fluid power coupling speed-regulating mode, thereby keeps the operation of whole system through dragging this feed water pump, prevents the shutdown in the power generation process of whole thermal power plant.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained among at least one embodiment or example of the utility model.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiments or example.
Although illustrated and described the embodiment of the utility model; Those having ordinary skill in the art will appreciate that: under the situation of principle that does not break away from the utility model and aim, can carry out multiple variation, modification, replacement and modification to these embodiments, the scope of the utility model is limited claim and equivalent thereof.
Claims (10)
1. a system that is used for drive water pump is characterized in that, comprising:
Frequency variator, said frequency variator is connected to high-voltage power through circuit breaker;
Main motor, said main motor is electrically connected with said frequency variator;
The frequency conversion differential protector, said frequency conversion differential protector is connected with said main motor and said main motor is carried out the frequency conversion differential protection;
Hydraulic couplers, said hydraulic couplers link to each other with said feed water pump with said main motor respectively, and under the operation of said main motor, drive said feed water pump rotation; And
Independent hydraulically controlled oily feed unit, said independent hydraulically controlled oily feed unit is supplied to said hydraulic couplers with hydraulic oil.
2. the system that is used for drive water pump according to claim 1 is characterized in that, said independent hydraulically controlled oily feed unit comprises:
First main oil pump, said first main oil pump is dragged by first motor and supplies with said hydraulic oil to said hydraulic couplers; And
Subsequent use main oil pump, said subsequent use main oil pump is dragged by second motor and when first main oil pump breaks down, supplies with said hydraulic oil to said hydraulic couplers.
3. the system that is used for drive water pump according to claim 1 is characterized in that, said frequency conversion differential protector is the self balancing differential relay, and said self balancing differential relay is installed in the terminal box of said main motor.
4. the system that is used for drive water pump according to claim 1 is characterized in that, said hydraulic couplers is the acceleration type hydraulic couplers.
5. the system that is used for drive water pump according to claim 1 is characterized in that, said system also comprises:
Power frequency Bypass Control unit, the parallelly connected setting in said power frequency Bypass Control unit with said frequency variator; And
Selector switch, said selector switch is electrically connected one in said main motor and said power frequency Bypass Control unit and the said frequency variator.
6. the system that is used for drive water pump according to claim 1; It is characterized in that; When said selector switch is electrically connected said driving motor with said frequency variator, come said driving motor is carried out speed governing through the frequency conversion of controlling said frequency variator, to control the driving of said feed water pump; And
When said selector switch is electrically connected said driving motor with said power frequency Bypass Control unit, through said hydraulic couplers is carried out the driving that said feed water pump is controlled in speed governing.
7. the system that is used for drive water pump according to claim 2 is characterized in that, said hydraulic couplers comprises:
Input shaft, said input shaft links to each other with the output shaft of said main motor;
Driving gear, said driving gear is fixedly connected with said input shaft;
Driven gear, said driven gear and the engagement of said driving gear;
Pump impeller, said pump impeller is fixedly connected with said driven gear; And
Turbine, said turbine drives said feed water pump through output shaft, and wherein said first main oil pump or said subsequent use main oil pump are supplied to said pump impeller and said turbine with said hydraulic oil.
8. the system that is used for drive water pump according to claim 1 is characterized in that, said system also comprises:
Front-mounted pump, said front-mounted pump links to each other with the import of said feed water pump and is dragged by three-motor.
9. the system that is used for drive water pump according to claim 1 is characterized in that, said system comprises a plurality of main motors, a plurality of feed water pump, a plurality of frequency conversion differential protectors and a plurality of hydraulic couplers, wherein
Each said main motor links to each other with the frequency conversion differential protector with corresponding hydraulic couplers respectively, and said hydraulic couplers drives in the said feed water pump respectively, and in said frequency variator and the said a plurality of main motors one links to each other.
10. the system that is used for drive water pump according to claim 9 is characterized in that, said independent hydraulically controlled oily feed unit is supplied to each hydraulic couplers with hydraulic oil.
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| CN2012204017722U CN202493391U (en) | 2012-08-14 | 2012-08-14 | Feed pump driving system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012204017722U CN202493391U (en) | 2012-08-14 | 2012-08-14 | Feed pump driving system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104196696A (en) * | 2014-08-26 | 2014-12-10 | 北京联优创展科技有限公司 | Water pump driving system |
| CN104405612A (en) * | 2014-11-14 | 2015-03-11 | 神华集团有限责任公司 | Boiler and feed pump system thereof |
| CN110332088A (en) * | 2019-07-10 | 2019-10-15 | 神华（福建）能源有限责任公司 | New Feedwater Pump System and Its Operation Method |
| CN114607580A (en) * | 2022-03-22 | 2022-06-10 | 鸿鲲新能源(海南)有限公司 | Oil well pressurization liquid injection system |
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2012
- 2012-08-14 CN CN2012204017722U patent/CN202493391U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104196696A (en) * | 2014-08-26 | 2014-12-10 | 北京联优创展科技有限公司 | Water pump driving system |
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