CN110469511A - The big transformation of constant flow adjusts centrifugal pump group - Google Patents
The big transformation of constant flow adjusts centrifugal pump group Download PDFInfo
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- CN110469511A CN110469511A CN201910862551.1A CN201910862551A CN110469511A CN 110469511 A CN110469511 A CN 110469511A CN 201910862551 A CN201910862551 A CN 201910862551A CN 110469511 A CN110469511 A CN 110469511A
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- centrifugal pump
- pump group
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- hydraulic
- hydraulic actuator
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- 230000009466 transformation Effects 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 230000009183 running Effects 0.000 claims abstract description 7
- 238000000844 transformation Methods 0.000 claims abstract 2
- 238000010977 unit operation Methods 0.000 claims abstract 2
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 239000003921 oil Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/12—Combinations of two or more pumps
- F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0072—Installation or systems with two or more pumps, wherein the flow path through the stages can be changed, e.g. series-parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of big transformations of constant flow to adjust centrifugal pump group, four centrifugal pump group outlets are connect by four sets of flow distributors with header inlet respectively, electro-hydraulic actuator passes through hydraulic executive module operation connection flow distributor, controller connects electro-hydraulic actuator, controller exports control signal to electro-hydraulic actuator, flow distributor is operated by hydraulic executive module by electro-hydraulic actuator, four centrifugal pump groups are made to realize the operating mode of separate unit operation or at least two centrifugal pump group combined runnings in series or in parallel, pass through the conversion of different working modes, meet ship equilibrium water system constant flow, the demand characteristics of big transformation.When pump group said system pepeline characteristic changes such as system pipeline resistance wide variation, constant flux water supply and the pump group output pressure that can be realized under design parameter continuously adjust on a large scale, and guarantee that pump group always works between high efficient area, it is provided simultaneously with lower vibration noise and anti-silt ability, to meet the water requirements of ship particular system.
Description
Technical field
The present invention relates to a kind of adjusting centrifugal pump group for ship equilibrium water system, especially a kind of big change of constant flow
Pressure adjusts centrifugal pump group.
Background technique
Marine pump, which refers to, meets the various pumps used for ship that ship specification regulation and technical conditions peculiar to vessel require, in ship
Above they are usually utilized to the various liquid such as conveying seawater, fresh water, sewage, lubricating oil and fuel oil.Ship equilibrium water system due to
Its system performance, it is desirable that affiliated marine pump has the spies such as flow is constant, pressure changeable range is wide, anti-silt solid impurity ability is strong
Point.Ship cabin bottom draining system also has similar demand to affiliated pump group.System uses centrifugal pump, anti-silt solid particle energy
Power is stronger, but when water system pipes characteristic changes, water supply changes therewith, and the water supply for seriously affecting ship needs
It asks；In order to solve constant flow rate, biggish pressure changeable range supplies water, and uses plunger pump, screw pump isometric(al) pump form, but hold
Product pump vibration noise is larger, affects greatly to environment such as vessel operation lives, meanwhile, the anti-silt of positive displacement pump, solid particle
The ability of equal impurity is poor, and maintenance is larger, and maintenance cost is higher.Therefore, currently, there is no suitable pump product that can preferably expire
Sufficient ship equilibrium water system constant flow, big transformation continuous high-efficient regulatory demand.
Summary of the invention
The present invention is to provide for a kind of big transformation adjusting centrifugal pump group of constant flow, and its object is to work as pump group said system pipe
When road characteristic is changed such as system pipeline resistance wide variation, constant flux water supply and pump under design parameter can be realized
Group output pressure continuously adjusts on a large scale, and guarantees that pump group always works between high efficient area, is provided simultaneously with lower vibration and makes an uproar
Sound and anti-silt ability, to meet the water requirements of ship particular system.
The technical scheme is that a kind of big transformation of constant flow adjusts centrifugal pump group, including centrifugal pump group, flow distributor,
Electro-hydraulic actuator, header, hydraulic executive module, controller, frequency converter, four centrifugal pump group outlets pass through four sets respectively
Flow distributor is connect with header inlet, and the electro-hydraulic actuator passes through hydraulic executive module operation connection flow distributor, the control
Device connects electro-hydraulic actuator, and controller exports control signal to electro-hydraulic actuator, passes through hydraulic executive module by electro-hydraulic actuator
Flow distributor is operated, four centrifugal pump groups is made to realize separate units operation or at least two centrifugal pump group combined runnings in series or in parallel
Operating mode meets the demand characteristics of ship equilibrium water system constant flow, big transformation by the conversion of different working modes.
Further, the controller connects the motor of centrifugal pump group by frequency converter, and the frequency converter feeds back frequency conversion shape
For state signal to controller, controller exports control frequency variation signal to frequency converter, to the revolving speed of every centrifugal pump group according to demand into
Row is adjusted in real time.
Further, the electro-hydraulic actuator feeds back electro-hydraulic actuator operating condition shape by the displacement sensor on electro-hydraulic actuator
For state signal to controller, controller receives the feedback letter for judging the pressure sensor of ship equilibrium water system environmental pressure
Number, and frequency conversion instruction signal is issued to frequency converter, frequency reducing adjusting is carried out when for realizing the reduction of ship equilibrium water system pressure,
Raising frequency adjusting is carried out when pressure increases, to realize the variable frequency adjustment of centrifugal pump group.
Further, the flow distributor have one piece of passive port plate and two pieces of active port plates, by passive port plate with
Two pieces of active port plates realize flow, realize the flow between water pump by different channels, change the flow of water pump or raise
Journey.
Further, the electro-hydraulic actuator includes valve block, solenoid valve, cabinet, pipe 3, gear pump, shaft coupling, motor, institute
It states equipped with hydraulic oil in cabinet, motor drives gear pump rotation, gear pump conveying high-pressure liquid by shaft coupling tooth connection wheel pump
Pressure oil flows into valve block by oil pipe, after electromagnetism Flat valve, into hydraulic executive module.
Further, when the electromagnetism valve events of electro-hydraulic actuator, high pressure enters the hydraulic execution in the hydraulic executive module
Cylinder, hydraulic actuating cylinder drive the port plate of flow distributor to work by connecting rod, and displacement sensor feedback linkage shift simulation signal is given
Controller.
Further, four centrifugal pump groups are arranged in the same mounting bracket in intersecting parallels, and flow distributor is arranged in often
Between two centrifugal pump groups or side, electro-hydraulic actuator across shape and four centrifugal pump groups are arranged in the same mounting bracket
On, hydraulic executive module is arranged in the space on flow distributor under mounting bracket, and header is arranged in the lower end of platform centrifugal pump group.
The beneficial effects of the present invention are:
1, by 4 centrifugal pump groups at pump group in actual moving process, 2 or more can be carried out according to place system requirements
Any number of units centrifugal pump combined running mode in series or in parallel, significantly promoted pump group effective range of operation；Meanwhile
The frequency converter configured by pump group, the revolving speed that can be pumped to every are adjusted in real time according to demand, further expand pump group
Working range, to meet the water requirements of system constant flow, big transformation comprehensively；
2, every pump is run according to system requirements real-time perfoming frequency control in pump group, so that every pump operates in efficiently
Rate region plays the effect for saving power consumption, effectively control vibration noise；
3, the control system of pump stack design uses integral arrangement and configuration, enables to pump group according to system need
Ask, the adjustment of series-parallel conversion and the speed of service that real-time perfoming respectively pumps, realize the intelligent operation of equipment, and relative to
More pump groups of preceding arrangement in bulk, pump group integral installation size of the present invention effectively reduce, it is easier to which mounting arrangements realize equipment
Miniaturization, integrated；
4, the present invention may extend to constant flow, efficient, low noise water supply requirement occasion, the cooling system comprising ship
The fields such as system, equal balance system, bottom drain system and municipal building water system.
Detailed description of the invention
Fig. 1 is that the big transformation of constant flow of the invention adjusts centrifugal pump group structural schematic diagram；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is that the big transformation of constant flow of the invention adjusts centrifugal pump group working principle diagram；
Fig. 4 is flow distributor of the invention；
Fig. 5 is electro-hydraulic actuator of the invention；
Fig. 6 is hydraulic executive module of the invention.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
As shown in figures 1 and 2, the big transformation of constant flow of the invention adjusts centrifugal pump group, 1, five set of flow of You Sitai centrifugal pump group
5, electro-hydraulic actuators 3 of device, a set of header 6 and several hydraulic executive modules 4 are formed, as shown in figure 3, electric part
It is made of controller 8, frequency converter 7 and its attached sensor.Wherein, four centrifugal pump groups 1 are arranged in same in intersecting parallels
In mounting bracket 2, flow distributor 5 is arranged between every two centrifugal pump group 1 or side, 3 across shape of electro-hydraulic actuator and four
Centrifugal pump group 1 is arranged in the same mounting bracket 2, and hydraulic executive module 4 is arranged in the sky on flow distributor 5 under mounting bracket 2
In, header 6 is arranged in the lower end of 4 centrifugal pump groups 1, the outlet phase of the import of header 6 and wherein four sets of flow distributors 5
Even, electro-hydraulic actuator 3 exports phase by hydraulic executive module 4 operation connection flow distributor 5, import and the centrifugal pump group 1 of flow distributor 5
Connection.Controller 8 connects the motor of centrifugal pump group 1 by frequency converter 7, wherein frequency converter 7 feeds back frequency conversion status signal to control
Device 8 processed, controller 8 export control frequency variation signal to frequency converter 7.Controller 8 connects electro-hydraulic actuator 3, the output control of controller 8
Signal operates flow distributor 5 by hydraulic executive module 4 to electro-hydraulic actuator 3, by electro-hydraulic actuator 3, makes two or more any
The combined running in series or in parallel of centrifugal pump group 1 of number of units.Electro-hydraulic actuator 3 feeds back electro-hydraulic hold by displacement sensor thereon
3 work condition state signal of row device is to controller 8.Controller 8 receives the pressure for judging ship equilibrium water system environmental pressure
The feedback signal of sensor.
As shown in figure 3, the working principle of the device of the invention:
After pressing the start button on controller 8, ship equilibrium water system environmental pressure is judged by pressure sensor, instead
It feeds controller 8, controller 8 judges the operating mode of centrifugal pump group 1 according to system environments pressure, and sends out to electro-hydraulic actuator 3
Operating condition adjusts preparation instruction out, and electro-hydraulic actuator 3 starts after receiving instruction, operates flow distributor 5 by hydraulic executive module 4, makes
The combined running mode in series or in parallel of centrifugal pump group 1 of two or more any number of units, meets the requirement of system environments pressure,
After flow distributor 5 is adjusted in place, by displacement sensor feedback working mode adjustment state signal to controller 8, which meets pre-
In the case where provisioning request, controller 8, which first issues, stops the instruction that electro-hydraulic actuator 3 is run, and electro-hydraulic actuator 3 stops, controller 8
Pump group corresponding to the instruction to 7,4 centrifugal pump groups 1 of frequency converter of pump group starting is issued again realizes variable frequency starting.Centrifugal pump group 1
In the process of running, when small range variation occurs for system ambient pressure, controller 8 is fed back to by pressure sensor, by controller 8
Frequency conversion instruction is issued to frequency converter 7, system ambient pressure, which reduces, carries out frequency reducing adjusting, and the increase of system ambient pressure carries out raising frequency tune
Section, to realize the variable frequency adjustment of centrifugal pump group 1.
When system ambient pressure wide variation, after controller 8 obtains pressure change signal, first stop centrifugal pump group 1
After operation, restarts electro-hydraulic actuator 3 and stop electro-hydraulic actuator 3, then again after the operational mode combination of adjustment flow distributor 5
Start centrifugal pump group 1 and enters operating status.Entire control process realizes intelligent control, does not need manual operation.
Combine shaping modes with variable frequency adjustment due to using operating mode combination, so that 4 centrifugal pump groups 1 is realized perseverance
The a wide range of transformation of flow is adjusted, and always in high efficient district, pump group has lower vibration noise.
According to current design objective, current flux parameter of the present invention is 20t/h, under the conditions of constant flow, pressure regulation spectrum
Reach 5m~480m, pump efficiency can reach 60% or more, and under-chassis is vibrated in 110dB or less.According to use demand, thus it is possible to vary
Design parameter realizes larger range of adjusting.
As shown in figure 4, flow distributor 5 is to realize flow by passive port plate I and active port plate II, III, 6 are shared
A channel.There are A, B, C, D totally 4 kinds of flow regimes.A condition a, c channel is closed, and the channel b, d, e, f is opened.It closes in the channel B state a, b
It closes, the channel c, d, e, f is opened.The channel C-state a, b, d, e is opened, and the channel c, f is closed.The channel D-state a, b, f is closed, c, d, e
It opens in channel.The flow between water pump is realized by different channels, changes the flow or lift of water pump.
As shown in figure 5, electro-hydraulic actuator 3 includes valve block 3-1, solenoid valve 3-2, cabinet 3-3, pipe 3-4, gear pump 3-5, connection
Axis device 3-6, motor 3-7.Hydraulic oil is housed in cabinet 3-3, after motor 3-7 work, gear pump is driven by shaft coupling 3-6
3-5 rotation, conveying high-pressure hydraulic oil flow into valve block 3-1 by oil pipe 3-4, after solenoid valve 3-2 flow, hold into hydraulic
Row component 4.
As shown in fig. 6, working as electro-hydraulic actuator electromagnetism valve events, hydraulic executive module 4 has high pressure oil to enter hydraulic actuating cylinder
After 4-1, connecting rod 4-2 movement drives the work of flow distributor port plate, displacement sensor 4-3 feedback linkage 4-2 shift simulation signal.
Claims (7)
1. a kind of big transformation of constant flow adjusts centrifugal pump group, including it is centrifugal pump group, flow distributor, electro-hydraulic actuator, header, hydraulic
Executive module, controller, frequency converter, it is characterised in that: four centrifugal pump group outlets pass through four sets of flow distributors and collection respectively
Flow tube import connection, for the electro-hydraulic actuator by hydraulic executive module operation connection flow distributor, the controller connection is electro-hydraulic
Actuator, controller export control signal to electro-hydraulic actuator, operate flow distributor by hydraulic executive module by electro-hydraulic actuator,
So that four centrifugal pump groups is realized the operating mode of separate unit operation or at least two centrifugal pump group combined runnings in series or in parallel, leads to
The conversion for crossing different working modes meets the demand characteristics of ship equilibrium water system constant flow, big transformation.
2. the big transformation of constant flow according to claim 1 adjusts centrifugal pump group, it is characterised in that: the controller passes through change
Frequency device connects the motor of centrifugal pump group, and the frequency converter feedback frequency conversion status signal becomes to controller, controller output control
Frequency signal is adjusted the revolving speed of every centrifugal pump group to frequency converter in real time according to demand.
3. the big transformation of constant flow according to claim 2 adjusts centrifugal pump group, it is characterised in that: the electro-hydraulic actuator is logical
The displacement sensor crossed on electro-hydraulic actuator feeds back electro-hydraulic actuator work condition state signal to controller, and controller is received for sentencing
The feedback signal of the pressure sensor of disconnected ship equilibrium water system environmental pressure, and frequency conversion instruction signal is issued to frequency converter,
Frequency reducing adjusting is carried out when for realizing the reduction of ship equilibrium water system pressure, raising frequency adjusting is carried out when pressure increases, thus real
The variable frequency adjustment of existing centrifugal pump group.
4. the big transformation of constant flow according to claim 1 adjusts centrifugal pump group, it is characterised in that: the flow distributor has one
The passive port plate of block and two pieces of active port plates, realize flow by passive port plate and two pieces of active port plates, by not
The flow between water pump is realized in same channel, changes the flow or lift of water pump.
5. the big transformation of constant flow according to claim 1 adjusts centrifugal pump group, it is characterised in that: the electro-hydraulic actuator packet
Valve block, solenoid valve, cabinet, pipe 3, gear pump, shaft coupling, motor are included, hydraulic oil is housed in the cabinet, motor passes through connection
Axis device tooth connection wheel pump drives gear pump rotation, and gear pump conveying high-pressure hydraulic oil flows into valve block by oil pipe, by solenoid valve
After flow, into hydraulic executive module.
6. the big transformation of constant flow according to claim 5 adjusts centrifugal pump group, it is characterised in that: when the electricity of electro-hydraulic actuator
Magnet valve movement, high pressure enter the hydraulic actuating cylinder in the hydraulic executive module, and hydraulic actuating cylinder drives flow distributor by connecting rod
Port plate work, displacement sensor feedback linkage shift simulation signal is to controller.
7. -6 any big transformations of the constant flow adjust centrifugal pump group according to claim 1, it is characterised in that: described in four from
Heart pump group is arranged in the same mounting bracket in intersecting parallels, and flow distributor is arranged between every two centrifugal pump group or side, electro-hydraulic
Actuator across shape and four centrifugal pump groups are arranged in the same mounting bracket, and hydraulic executive module is arranged in flow distributor
In space under upper mounting bracket, header is arranged in the lower end of platform centrifugal pump group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910862551.1A CN110469511B (en) | 2019-09-12 | 2019-09-12 | Constant flow large pressure-variable regulating centrifugal pump set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910862551.1A CN110469511B (en) | 2019-09-12 | 2019-09-12 | Constant flow large pressure-variable regulating centrifugal pump set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110469511A true CN110469511A (en) | 2019-11-19 |
| CN110469511B CN110469511B (en) | 2024-08-27 |
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ID=68515744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910862551.1A Active CN110469511B (en) | 2019-09-12 | 2019-09-12 | Constant flow large pressure-variable regulating centrifugal pump set |
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| Country | Link |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190911558A (en) * | 1909-05-15 | 1909-07-29 | Arthur George Bloxam | Improvements in Centrifugal Pumps. |
| US3110264A (en) * | 1962-07-03 | 1963-11-12 | Sterling Prec Corp | Changeover controller for seriesparallel hydraulic pump |
| JPS59590A (en) * | 1982-06-28 | 1984-01-05 | Agency Of Ind Science & Technol | Compound centrifugal multi-stage pump |
| CN201106586Y (en) * | 2007-11-05 | 2008-08-27 | 贵州红林机械有限公司 | Oil source system assembly for hydraulic actuator |
| CN104533797A (en) * | 2015-01-12 | 2015-04-22 | 中国船舶重工集团公司第七0四研究所 | Four-stage series-and-parallel connection pump |
| CN204572469U (en) * | 2015-01-12 | 2015-08-19 | 中国船舶重工集团公司第七0四研究所 | Level Four series and-parallel connection pump |
| CN209115450U (en) * | 2018-11-02 | 2019-07-16 | 太重榆次液压工业（上海）有限公司 | A kind of hydraulic power unit |
| CN210738824U (en) * | 2019-09-12 | 2020-06-12 | 中国船舶重工集团公司第七0四研究所 | Constant flow large pressure changing regulating centrifugal pump set |
-
2019
- 2019-09-12 CN CN201910862551.1A patent/CN110469511B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190911558A (en) * | 1909-05-15 | 1909-07-29 | Arthur George Bloxam | Improvements in Centrifugal Pumps. |
| US3110264A (en) * | 1962-07-03 | 1963-11-12 | Sterling Prec Corp | Changeover controller for seriesparallel hydraulic pump |
| JPS59590A (en) * | 1982-06-28 | 1984-01-05 | Agency Of Ind Science & Technol | Compound centrifugal multi-stage pump |
| CN201106586Y (en) * | 2007-11-05 | 2008-08-27 | 贵州红林机械有限公司 | Oil source system assembly for hydraulic actuator |
| CN104533797A (en) * | 2015-01-12 | 2015-04-22 | 中国船舶重工集团公司第七0四研究所 | Four-stage series-and-parallel connection pump |
| CN204572469U (en) * | 2015-01-12 | 2015-08-19 | 中国船舶重工集团公司第七0四研究所 | Level Four series and-parallel connection pump |
| CN209115450U (en) * | 2018-11-02 | 2019-07-16 | 太重榆次液压工业（上海）有限公司 | A kind of hydraulic power unit |
| CN210738824U (en) * | 2019-09-12 | 2020-06-12 | 中国船舶重工集团公司第七0四研究所 | Constant flow large pressure changing regulating centrifugal pump set |
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| Publication number | Publication date |
|---|---|
| CN110469511B (en) | 2024-08-27 |
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