CN107829941A - A kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump - Google Patents
A kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump Download PDFInfo
- Publication number
- CN107829941A CN107829941A CN201711137513.7A CN201711137513A CN107829941A CN 107829941 A CN107829941 A CN 107829941A CN 201711137513 A CN201711137513 A CN 201711137513A CN 107829941 A CN107829941 A CN 107829941A
- Authority
- CN
- China
- Prior art keywords
- pump
- impeller
- blade
- centrifugal
- impellers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
-
- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump, belong to centrifugal pump field.The centrifugal pump includes pump shaft, and the pump shaft both ends set bearing box assembly respectively.The present invention uses the half-opened impeller without balance pipe and back blade, avoids the Flow Field Distribution in Effects of Secondary Flow pump；The blade of impeller is straight radial blade, arranges that head coefficient is high by 13~15 linear leafs and 13~15 middle blade uniform intervals, avoids that the double shrouded wheel number of blade is few, and impeller channel diffusance is big, at impeller outlet backflow cause head curve hump easily occur；Two groups of impellers are arranged symmetrically, and the draw ratio of nockbush is 1.3~1.6 between two groups of impellers, enhances the supporting role of liquid film, improves the wet criticality rotating speed of rotor.The pump housing is axially split type, does not disintegrate after rotor dynamic balancing is qualified, is directly loadable into lower pump body, and the concentricity of dynamic balance accuracy and part is unchanged.
Description
Technical field
The present invention relates to centrifugation pump technical field, more particularly to a kind of low discharge ultrahigh pump lift axial subdivision semi-open type leaf
Take turns centrifugal multistage pump multiple centrifugal pump.
Background technology
30~50m of flow3/ h, 1500~2000m of lift pump belong to crucial pump in industries such as petrochemical industry, synthesis ammonia, generatings,
To high pressure reciprocating pump, even if using five cylinders or seven cylinders, adverse effect of the transfusion pulsation to technique productions can not be all overcome, due to big
There is the defects of fault rate is high, bulky, expensive in power high pressure reciprocating pump, development is all focused on centrifugal pump by each state
On.But this ultralow specific revolution centrifugal pump is one of generally acknowledged technical barrier of pump industry, annoyings grinding for this centrifugal pump always
System and development, because the centrifugal pump of this parameter has many special technical barriers：Major diameter narrow flow road double shrouded wheel system
Make that difficulty is big, the efficiency of pump is low, hump easily occurs in head curve, cause pump unstable, shaft power curve when low discharge area is run
Rise soon than conventional centrifugal pump, motor easily overloads during big flow.
To solve above-mentioned technical barrier, prior art has three kinds：
First, the series of increase pump：Make the specific revolution of single-stage increase.But for low-capacity pump, as series is excessive, pump
Axle is elongated, and the rigidity of pump shaft reduces, and easily causes and occurs to be engaged stuck accident at small―gap suture in pump, reduces operational reliability.
Second, high speed：Because specific revolution is directly proportional to rotating speed, the property of loaw specific speed pump can also be improved by improving rotating speed
Energy.But for above-mentioned flow, lift, with victory dyne express pump, rotating speed will manufacture water near or above 20,000 turns per minute
Flat to require very high, pump high price is expensive.On certain pump manufacturer sample, flow 25m3/h, lift 1250m, rotating speed 20600r/min.In stone
Change industry, the ratio very little of express pump is used for the centrifugal pump of above-mentioned parameter.Only pipe rise rotating speed, subtract series, cost declining be from
The trend of heart pump technology development, but the maximum speed of Thermal Power Generation Industry high pressure water feeding pump for boiler only 6500r/min, Flowserve are public
Take charge of the maximum speed only 6000r/min of CA series nuclear power safety injection pumps.
Third, use half-opened impeller：Blade profile multiple-blade, straight radial blade, head coefficient are higher than conventional backward leaning vane,
The well-known pump company such as ITT, Flowserve uses already on single-stage small flow centrifugal pump at present.API 610-2010 versions start
Allow to use half-opened impeller, and point out " because half-opened impeller has lacked the garden disk friction loss of a cover plate, effect can be improved
Rate ".To low-capacity pump, this half-opened impeller accuracy of manufacture easily ensures, overcomes China's low-capacity pump double shrouded wheel multi-purpose greatly,
The number of blade only 5~7, because impeller channel diffusance is too big, flows back at impeller outlet, causes low discharge to zero delivery area
Hump be present in the head curve in domain.But this half-opened impeller of prior art, for balancing axial thrust, opened on wheel disc
Substantial amounts of balance pipe, there is the Flow Field Distribution in Effects of Secondary Flow pump, reduce the efficiency of pump.The beginning of this century, Sulzer company are
This defect is avoided to be improved, the OHHL type single-stage half-opened impeller low-capacity pumps developed eliminate a large amount of on the impeller disk
Balance pipe, only retain the balance pipe at impeller hub, but in order to balance the axial force of single-stage impeller, add back blade, pump
Efficiency will reduce 2~5 percentage points.The traditional structure of Sundyne Corp. of U.S. high speed centrifugation impeller of pump is 6~8 straight leaves of radial direction
Piece, many balance pipes are opened on wheel disc, the Flow Field Distribution in Effects of Secondary Flow pump occurs, reduces the efficiency of pump.Sundyne Corp.
New improve is to use 24 straight radial blades, and the balance pipe on cancellation wheel disc, is balancing axial because being single-stage impeller express pump
Power, retain the balance pipe of the wheel hub of impeller.It can be seen that the half-opened impeller low-capacity pump of prior art, the wheel hub of impeller have
Balance pipe, mutually impacted from the liquid stream of balance pipe leakage with entering the main liquid stream of impeller, destroy the proper flow shape of import liquid stream
State, the anti-cavitation performance of pump can be reduced.
2014.11.19 " hydraulic part is arranged symmetrically the high nuclear powerization of reliability and holds small pump " the patent of invention Shen announced
Please specification (publication No. CN 104154027A), be to be directed to flow 34m3/ h, lift 1800m small pump, cooled down for reactor
Water system provides supplement water.60 DEG C of pump inlet pressure of water temperature are not high, are the water column static pressure of normal pressure hopper, and no problem of cavitation is first
Level impeller single-suction is reasonable.This pump is double-layer barrel BB5 type pumps, and 13 grades of impellers are divided into two groups, and impeller is back-to-back to be arranged symmetrically
Balancing axial thrust, the balancing drum that existingization holds small pump is eliminated, it is reasonable in design.But this patent of invention also Shortcomings, when
Low-capacity pump double shrouded wheel, runner is long narrow, and the number of blade can only be lacked, and head coefficient certainty specific diameter is to multiple-blade half-opened impeller
Low, impeller outer diameter will increase, and high pressure outer cylinder body manufacturing cost rises；Second, narrow flow road enclosed formula pump vane casting is difficult, runner precision
It is not easy to ensure；Third, designer is for excessive, the nockbush among rotor that prevents the spacing of 13 grades of vane rotor both ends support
Length it is very short.Because the pressure difference at nockbush both ends passes through the leakage of nockbush close to the half (90bar) of pump total pressure head
Measure and be inversely proportional with the length of nockbush, cause internal leakage to increase；The support of central bush liquid film, improve wet criticality rotating speed
Effect also fails to effectively utilize.
2017.2.22 " centrifugal multistage pump multiple centrifugal pump of the low discharge ultrahigh pump lift of the half-opened impeller and the use impeller " hair announced
Bright patent application specification (A of publication No. CN 106438457), and for flow 34m3/ h, lift 1800m small pump,
And double-layer barrel BB5 type pumps, 13 grades of impellers are radial direction multiple-blade half-opened impeller, and this is employed on centrifugal multistage pump multiple centrifugal pump
API 610-2010 standard clauses 6.6.1 point out " because half-opened impeller has lacked the garden disk friction loss of a cover plate, can be with
The viewpoint of raising efficiency ", it is rare both at home and abroad, there is innovation.But there is also deficiency, first, being balancing axial thrust, by single-stage low discharge
Pump opens the structure of a large amount of balance pipes with multistage pump on hub disk, will appear from Secondary Flow, influences the flow field point in pump
Cloth, reduce the efficiency of pump.Mutually impacted from the liquid stream that the wheel hub balance pipe of impeller leaks and the main liquid stream of entrance impeller, destroy into
The proper flow state of oral fluid stream, the anti-cavitation performance of pump can be reduced.Second, impeller is arranged, it is necessary to come by balancing drum as in the same direction
Balancing axial thrust.The vane inlet machine that impeller is can be seen that from the half-opened impeller of accompanying drawing 1 of the application for a patent for invention specification adds
Work into seamed edge taken both when, and unnecessarily, vane inlet is butt end, has impact to becoming a mandarin, vane inlet area of passage is smaller, enters
Mouth flow velocity is higher, unfavorable to improving anti-cavitation performance.
Common deficiency also be present in the patent of invention during this two China State Intellectual Property Offices examine：Pump rotor dynamic balancing
After qualified, all impellers will be removed from axle, then diffusers at different levels and impeller etc. are assembled into core bag, it is ensured that between cooperation
Gap and dynamic balance accuracy are completely constant to be not easy.During repairing rotor, released in whole core Bao Yaocong outer cylinder bodies, whole core bag
To dismantle step by step, repair, after pump rotor dynamic balancing is qualified, repeat above-mentioned assembling process again.
The content of the invention
It is an object of the invention to overcome the shortcomings of that above-mentioned two are directed to ultralow specific revolution centrifugal multistage pump multiple centrifugal pump patent of invention, carry
For reliable a kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump rational in infrastructure.
To achieve the above object, the basic conception of technical solution of the present invention is that efficiency high, lift are used on centrifugal multistage pump multiple centrifugal pump
The half-opened impeller that coefficient is high, easily manufactures, cancel on single-stage small flow centrifugal pump using the balance pipe on half-opened impeller and
Back blade.The blade of two sections of impellers is straight radial blade, by 13~15 linear leafs and 13~15 middle blade uniform intervals cloth
Put, avoid that the double shrouded wheel number of blade is seldom, and impeller channel diffusance is too big, is flowed back at impeller outlet, causes low discharge
To hump existing for the head curve in zero delivery region.The most economical manufacture method of half-opened impeller is essence casting, what essence casting was formed
Vane inlet knob portion, reduces the impact to becoming a mandarin, and to make middle lengthened vanes, avoids vane inlet area of passage small again, two kinds
The inducer of blade is thinned to import, and the head of blade is essence casting knob, reduces the impact to becoming a mandarin.Two groups of half-opened impeller back ofs the body
Balancing axial thrust is arranged symmetrically to the back of the body.The extended length of nockbush among rotor, makes draw ratio increase to 1.3~1.6, subtracts
Lack the internal leakage at nockbush among caused by about half total pressure head, and enhance liquid film between intersegmental bushing and axle sleeve
Supporting role (" Trofim Lomakin " effect), improves the wet of rotor and faces Jie's rotating speed.
Most of petrochemical equipments all by-product high-pressure steams, all preferred Steam Turbine Driven pump in engineering design, steam turbine
Rotating speed is higher than 3000r/min.When the centrifugal pump Steam Turbine Driven of the present invention, revolution speed rise, always raised to reach identical
Journey, the series of pump are reduced, and the hypotelorism of rotor dual-gripper is wet to face the raising of Jie's rotating speed, ensure that wet Jie's rotating speed that faces turns with operation
Speed ratio it is sufficiently large, pump it is reliable.
The pump housing uses axially split type, does not disintegrate after rotor dynamic balancing is qualified, is directly loadable into lower pump body, dynamic balance accuracy
It is unchanged with the concentricity of part.During repairing rotor, upper pump casing is only hung out, does not pull down the inlet and outlet adapter on the pump housing, so that it may examine
The gap looked at impeller situation and choma, restrictor ring.Invention applies this prior art, and in my company's country's extreme term
Successfully used on mesh, but be not belonging to the protection domain of this patent.
Therefore, the innovative point of technical solution of the present invention is：
A kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump, including pump shaft, drive end bearing case
Part, lower pump body, upper pump casing, low pressure stage impeller, diffuser, dividing plate, middle nockbush, middle axle sleeve, high pressure section impeller, machine
Seal part, non-driven-end bearing box part, it is characterised in that：All impellers are half-open without balance pipe and back blade on wheel disc
Formula impeller, the blade of all impellers is straight radial blade, by 13~15 linear leafs and 13~15 middle blade uniform intervals cloth
Put；Low pressure stage and high pressure section impeller are arranged symmetrically；The draw ratio of middle nockbush and middle axle sleeve between two sections of impellers
For 1.3~1.6.
The beneficial effects of the present invention are：
1. because half-opened impeller has lacked the garden disk friction loss of a cover plate, efficiency is higher than conventional double shrouded wheel.
2. eliminate a large amount of balance pipes and back blade on half-opened impeller, caused by avoiding balance pipe and back blade
The efficiency of pump reduces, and avoids the defects of liquid stream leaked from the wheel hub balance pipe of impeller reduces pump anti-cavitation performance.
3. due to arranging that impeller channel diffusance is small by 13~15 linear leafs and 13~15 middle blade uniform intervals,
Avoid conventional small flow centrifugal impeller of pump exit to flow back, cause low discharge to the head curve in zero delivery region to exist
Hump.
4. the draw ratio of the nockbush among rotor increases to 1.3~1.6, the interstitial fluid of intersegmental bushing and axle sleeve is enhanced
The supporting role of film, improve the wet of rotor and face Jie's rotating speed.According to the medium differential pressure at nockbush both ends, nockbush internal diameter,
The length in gap and nockbush between nockbush and axle sleeve, the leakage rate of medium, with the traditional formula meter on pump handbook
Calculate：
Q=π dh3ΔP/12μL
In formula：Q-leakage rate, m3/h；D-restrictor sleeve external diameter；The gap of h-between nockbush and axle sleeve；
The medium differential pressure at Δ P-nockbush both ends；μ-medium dynamic viscosity；The length of L-nockbush
It was found from above formula, the length L of leakage rate Q and nockbush is inversely proportional, and because chock length lengthens, reduces intersegmental
Leakage rate.
Below in conjunction with the accompanying drawings, specific embodiments of the present invention and implementation result are further described.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example.
Fig. 1 is a kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump provided in an embodiment of the present invention
Structural representation；
Fig. 2 is the structure chart of half-opened impeller provided in an embodiment of the present invention；
Fig. 3 is another structure chart of half-opened impeller provided in an embodiment of the present invention.
In figure：Pump shaft 1, drive end bearing box assembly 2, non-driven-end bearing box assembly 3, low pressure stage impeller sets 4, high pressure section
Impeller sets 5, impeller 6, middle axle sleeve 7, middle nockbush 8, dividing plate 9, diffuser 10, upper pump casing 11, lower pump body 12, sealing group
Part 13.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained, belong to what the present invention protected
Scope.
Embodiment
It is a kind of low discharge ultrahigh pump lift axial subdivision semi-open type provided in an embodiment of the present invention referring to Fig. 1, Fig. 2, Fig. 3
Impeller centrifugal multistage pump multiple centrifugal pump, as shown in Figure 1 and Figure 2, the centrifugal pump include pump shaft 1, and the both ends of pump shaft 1 set drive end axle respectively
Hold box assembly 2 and non-driven-end bearing box assembly 3；
The low pressure stage impeller sets 4 and high pressure section impeller sets 5 include the multiple impellers 6 being set on the pump shaft 1；Institute
State and be provided with middle axle sleeve 7 on pump shaft 1 between the low pressure stage impeller sets 4 and high pressure section impeller sets 5, the middle axle sleeve
7 outer covers are equipped with middle nockbush 8；The draw ratio of the middle axle sleeve 7 and middle nockbush 8 is 1.3~1.6；
The impeller 6 includes the impeller bodies and multi-disc straight radial blade without balance pipe and without back blade；Described in multi-disc
Straight radial blade include being arranged at 13~15 length of a film straight radial blades that uniform intervals in the impeller bodies set and 13~
15 middle straight radial blades；
Wherein, the blade for multiple impellers 6 that the low pressure stage impeller sets 4 include is towards the drive end bearing case
Component；The blade for multiple impellers 6 that the high pressure section impeller sets 5 include is towards the non-driven-end bearing box assembly.
Further, the low pressure stage impeller sets 4 and high pressure section impeller sets 5 include it is multiple be arranged at two impellers it
Between dividing plate 9 and diffuser 10.Also include be arranged at outside the low pressure stage impeller sets 4 and high pressure section impeller sets 5 can
Dismounting connected upper pump casing 11 and lower pump body 12.The pump housing both ends are separately provided for installing the sealing group of mechanical seal
Part 13.The exposed pump shaft head of drive end bearing box assembly is connected with driving machine by shaft coupling.
It is for a clearer understanding of the present invention, existing with the targeted small pump parameter (flow of above two patents of invention
34m3/ h, lift 1800m, 60 DEG C of medium temperature, medium proportion is exemplified by 0.983), provide the particular technique details of the present invention.
For said pump parameter, to ensure that embodiment of the present invention is safe reliable, the present inventor make use of a kind of suitable
Single-stage half-opened impeller low-capacity pump approved product carry out Transform Type design.
2 × 3 × 10 type single-stage half-opened impeller low-capacity pump technical data sheet (specific revolution=29.2, impeller outer diameters
254mm, n=2910r/min)
| Flow Q, m3/h | 5 | 10 | 15 | 20 | 25 | 30 |
| Lift H, m | 117.8 | 116.9 | 115.1 | 114 | 109.1 | 100.3 |
| Efficiency eta, % | 15.6 | 27 | 35.3 | 40.5 | 44.8 | 43.4 |
| Net positive suction head NPSH3, m | 1 | 1.04 | 1.08 | 1.12 | 1.2 | 1.8 |
| Shaft power P, kW | 10.3 | 11.79 | 13.32 | 15.3 | 16.6 | 18.9 |
With 9 grades of impellers, single-stage lift H=200m, by upper flow-meter 25m3/ h lift H=109.1m conversions change rotating speed
When pump performance, it is theoretical with designing [M] Chinese Yuhang Publishing House by all the works modern times pump of waking up is closed, 2011
Seek rotating speed：H=200m=109.1 × (n ÷ 2910) 2, calculates n=3940r/min
Rotating speed is upgraded to flow Q=25 × (3960 ÷ 2910)=34.02m during 3960r/min3/h
Single-stage lift H=200 × (3960 ÷ 3940) 2=202m during rotating speed 3960r/min,
Total (pumping) head=1818m of 9 grades of impellers, rotating speed 3960r/min meet flow 34m3/ h, lift 1800m requirement.
Rise rotating speed behind efficiency to calculate by the above-mentioned formula of " modern pump is theoretical with designing " handbook P.65, efficiency eta=46.1%.
Shaft power P=0.983 × 34 × ÷ the 0.461=355.4kW of 1800 ÷, 3.6 ÷ 102.
400kW such as is selected with motor, rich degree 1.13, meets the standards of API 610, the requirement of rich degree 1.1.
For petrochemical equipment, preferred Steam Turbine Driven, reduction gear box is not required to, as turbine speed is higher than 3942r/min,
The series of the pump need to be reduced.Such as driven with motor, the preferred existing high-speed induction motor of in the market, be also not required to step-up gear.
The explanation of axially split type is used to the pump housing of the present invention.With the maintenance of this style of pump housing conveniently, can be protected during maintenance
The concentricity for demonstrate,proving rotor dynamic balancing precision and part is unchanged, it has also become and the pump-type that multistage pump is greatly developed in the world today is beautiful
The poor amine liquid pump of the pump housing axially split type DMXD-K (BB3) type that BECHTEL JACOBS companies of state use for 2007, outlet pressure
Up to 389.5bar.The pump housing axially split type BB3 type sea water pumps of company's manufacture where the present inventor, outlet pressure 179bar,
Bear successful operation more than 2 years on river company offshore platform in CNOOC.The pump discharge pressure of the present embodiment is 181bar, the pump housing
It is technically feasible, safe using axially split type.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent substitution and improvements made within the spirit and principles in the present invention etc., are all contained in protection scope of the present invention
It is interior.
Claims (1)
1. a kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump, including pump shaft（1）, drive end bearing case
Part（2）, non-driven-end bearing box assembly（3）, low pressure stage impeller sets（4）, high pressure section impeller sets（5）, impeller（6）, jackshaft
Set（7）, middle nockbush（8）, dividing plate（9）, diffuser（10）, upper pump casing（11）, lower pump body（12）, seal assembly（13）,
It is characterized in that：All impellers are the half-opened impeller without balance pipe and back blade on wheel disc, and the blade of all impellers is footpath
To prismatic blade, arranged by 13 ~ 15 linear leafs and 13 ~ 15 middle blade uniform intervals；Low pressure stage and the symmetrical cloth of high pressure section impeller
Put；The draw ratio of middle nockbush and middle axle sleeve between two sections of impellers is 1.3~1.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711137513.7A CN107829941A (en) | 2017-11-16 | 2017-11-16 | A kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711137513.7A CN107829941A (en) | 2017-11-16 | 2017-11-16 | A kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107829941A true CN107829941A (en) | 2018-03-23 |
Family
ID=61652677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711137513.7A Pending CN107829941A (en) | 2017-11-16 | 2017-11-16 | A kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107829941A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412775A (en) * | 2018-04-13 | 2018-08-17 | 沈阳格瑞德泵业有限公司 | A kind of first-stage double-absorption inner core axial subdivision multistage double casing volute pump |
| CN109885886A (en) * | 2019-01-22 | 2019-06-14 | 三联泵业股份有限公司 | A kind of Hydraulic Design Method reducing multistage pump head curve hump |
| CN111536073A (en) * | 2020-05-25 | 2020-08-14 | 浙江理工大学 | Centrifugal pump semi-open impeller with gap channel arranged on blade top |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040252A (en) * | 1988-08-08 | 1990-03-07 | 英格索尔-兰德公司 | Improved centrifugal pump |
| CN200964953Y (en) * | 2006-10-28 | 2007-10-24 | 浙江佳力科技股份有限公司 | Horizontal split multi-stage diffuser pump |
| CN202273913U (en) * | 2011-09-02 | 2012-06-13 | 合肥华升泵阀有限责任公司 | Impeller for partial emission pump |
| CN103541925A (en) * | 2013-10-31 | 2014-01-29 | 江苏国泉泵业制造有限公司 | Design method for cyclone pump impeller with long and short blades |
| CN103557180A (en) * | 2013-10-31 | 2014-02-05 | 江苏国泉泵业制造有限公司 | Design method of impeller of vortex pump provided with long and short blades |
| CN106438457A (en) * | 2016-10-28 | 2017-02-22 | 福斯流体控制（苏州）有限公司 | Half-opened impeller and low-flow super high-lift multiple-stage centrifugal pump with same |
-
2017
- 2017-11-16 CN CN201711137513.7A patent/CN107829941A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040252A (en) * | 1988-08-08 | 1990-03-07 | 英格索尔-兰德公司 | Improved centrifugal pump |
| CN200964953Y (en) * | 2006-10-28 | 2007-10-24 | 浙江佳力科技股份有限公司 | Horizontal split multi-stage diffuser pump |
| CN202273913U (en) * | 2011-09-02 | 2012-06-13 | 合肥华升泵阀有限责任公司 | Impeller for partial emission pump |
| CN103541925A (en) * | 2013-10-31 | 2014-01-29 | 江苏国泉泵业制造有限公司 | Design method for cyclone pump impeller with long and short blades |
| CN103557180A (en) * | 2013-10-31 | 2014-02-05 | 江苏国泉泵业制造有限公司 | Design method of impeller of vortex pump provided with long and short blades |
| CN106438457A (en) * | 2016-10-28 | 2017-02-22 | 福斯流体控制（苏州）有限公司 | Half-opened impeller and low-flow super high-lift multiple-stage centrifugal pump with same |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412775A (en) * | 2018-04-13 | 2018-08-17 | 沈阳格瑞德泵业有限公司 | A kind of first-stage double-absorption inner core axial subdivision multistage double casing volute pump |
| CN109885886A (en) * | 2019-01-22 | 2019-06-14 | 三联泵业股份有限公司 | A kind of Hydraulic Design Method reducing multistage pump head curve hump |
| CN109885886B (en) * | 2019-01-22 | 2022-12-09 | 三联泵业股份有限公司 | Hydraulic design method for reducing hump of multi-stage pump head curve |
| CN111536073A (en) * | 2020-05-25 | 2020-08-14 | 浙江理工大学 | Centrifugal pump semi-open impeller with gap channel arranged on blade top |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Girdhar et al. | Practical centrifugal pumps | |
| CN107829941A (en) | A kind of low discharge ultrahigh pump lift axial subdivision half-opened impeller centrifugal multistage pump multiple centrifugal pump | |
| CN110985402B (en) | Small-flow ultrahigh-lift pitot tube pump | |
| CN201265547Y (en) | Balancing type single-suction horizontal multiple-stage centrifugal pump | |
| CN106089728A (en) | A kind of horizontal multi-stage centrifugal pump | |
| CN105673553A (en) | Diagonal flow pump | |
| CN106870243A (en) | A kind of multi-state multistage turbine | |
| CN106246559B (en) | A kind of Double pump body double-suction type canned motor pump | |
| CN108869379B (en) | Centrifugal pump sealing ring with axial guide vanes | |
| CN205533288U (en) | Double -suction multi -stage centrifugal pump | |
| CN103277342B (en) | The centrifugal Residual heat removal pump reflux device of a kind of nuclear power | |
| CN205714923U (en) | A kind of diagonal pumps | |
| CN201627724U (en) | Vertical multi-stage centrifugal pump | |
| Gülich et al. | Pump types and performance data | |
| CN106640666A (en) | Multi-stage centrifugal pump | |
| CN203035616U (en) | Pumping chamber for volute mixed-flow pump | |
| CN113775533B (en) | Turbopump device for rocket engine | |
| CN206035832U (en) | Open multistage centrifugal pump in double feed inlet double suction level | |
| CN104265639A (en) | Gear speed increasing assembly type high speed rotating casing pump unit | |
| CN210637242U (en) | Multistage pump flow-induced vibration suppression device | |
| CN1031474C (en) | Axial-flow type high-speed paddle pump | |
| CN103835987A (en) | Low-temperature deep-well pump | |
| CN204082677U (en) | A kind of single segment structure of multistage sectional centrifugal pump | |
| CN204739000U (en) | Axial -flow pump impeller structure that leaked on no leaf top | |
| CN106979115B (en) | Reaction type hydraulic turbine and main shaft sealing system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180323 |
|
| RJ01 | Rejection of invention patent application after publication |