CN209324681U - Multiple shafting high-lift centrifugal pump - Google Patents
Multiple shafting high-lift centrifugal pump Download PDFInfo
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- CN209324681U CN209324681U CN201821990835.6U CN201821990835U CN209324681U CN 209324681 U CN209324681 U CN 209324681U CN 201821990835 U CN201821990835 U CN 201821990835U CN 209324681 U CN209324681 U CN 209324681U
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- centrifugal pump
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Abstract
The utility model relates to a kind of multiple shafting high-lift centrifugal pumps, including prime mover, prime mover main shaft, low-speed gear, two high gears, two centrifugal pumps, two centrifugal pumps are separately mounted to pump seat lower part, described prime mover is connect by prime mover main shaft with low-speed gear, low-speed gear is engaged simultaneously with two high gears and is connect, two high gears are connect with the pump shaft of two centrifugal pumps respectively, outlet is equipped on the outside of one centrifugal pump, inside is equipped with import, import is connected by connecting component with the outlet on the inside of another centrifugal pump, another centrifugal pump lower end is equipped with import.The utility model converts original elongated flexible single shafting to parallel multiple shafting rigid rotator, effectively solves the problems such as rotor crosses critical problem bring rotor unstability, vibration, improves the stability of equipment operation.
Description
Technical field
The utility model relates to a kind of high-lift centrifugal pump, especially a kind of multiple shafting high-lift centrifugal pump.
Background technique
The usual lift of ultrahigh pump lift centrifugal pump is higher than 1500m, is widely used in the fields such as aviation, petrochemical industry, nuclear power.Mesh
Preceding domestic and international ultrahigh pump lift centrifugal pump is all made of a root system, i.e. high speed prime mover (variable frequency high-speed motor, steam turbine, combustion gas wheel
Machine etc.) driving is with shafting ultrahigh pump lift centrifugal pump, since ultrahigh pump lift centrifugal pump impeller series is more, pump shaft state in elongate shape,
The minimum diameter of axle limits impeller inlet diameter, constrains impeller adiabatic efficiency, and energy loss is higher.
Jiangxi water economic system, 04 phase in 2016 have delivered the " high-lift multi-stage centrifugal pump based on ANSYS Workbench turn
Sub- model analysis " coordinates simulation software using ANSYS Workbench and carries out model analysis to Multistage centrifugal pump rotor, obtains
Preceding ten ranks intrinsic frequency and the vibration shape.The vibration characteristics of rotor-support-foundation system is studied, influence of the impeller progression to mode, analysis prediction are investigated
A possibility that impeller progression variation causes vibration.The result shows that: the stepless centrifugal pump of D type vibration characteristics under given operating condition is good,
It will not resonate.A possibility that increasing impeller progression, causing resonance increases, and should avoid the revolving speed section fortune for easily causing resonance
Row.Analysis result is that theory is established in the vibrating failure diagnosis of rotor-support-foundation system and prediction, dynamic characteristics optimization design, dynamic analysis
Basis is of great significance to reducing to vibrate, avoid resonance, safe and stable operation etc..
Lanzhou University of Science & Technology, 2012, deliver " research of high-speed, multi-stage centrifugal pump rotor dynamic characteristics ", high-speed centrifugal pump knot
Structure is compact, low cost, has a wide range of applications in engineering fields such as chemical industry, space flight.It is rocket fuel supply, nuclear submarine row
The capital equipment of the key equipment and industrial or agricultural water supply etc. of the space flight such as water and nuclear power station condensation water supply and military industry field.Mesh
Before, high-speed centrifugal pump just develops towards high-power, high-revolving direction, to cross over one, second order sometimes in the process of running, very
It is become apparent in this respect to the rotor for being three ranks or higher critical speed, especially multistage pump, operation stability is by critical
The influence and restriction of revolving speed are more prominent.In order to guarantee the even running of Multistage centrifugal pump rotor, avoid close to its critical turn
Resonance is generated when fast and influences stability and the service life of pump operation, and when design has to be accurately calculated it in the operating condition
Critical speed, i.e. critical speed under " wet " state.
There are main problems for the prior art:
1) the ultrahigh pump lift centrifugal pump rotor of single shafting was essentially all the flex rotor of critical speed, when starting is run
There are problems that critical rotor operation stability, and be also easy to produce rotor unstability, and caused vibration noise, and damaged equipment.
2) flex rotor is poor in design calculating accuracy, and rotor machining and dynamic balance running difficulty are big, and direct cost is high.
3) multistage centrifugal impeller of pump is architectural limitation, and overall efficiency is relatively low, and pump group energy consumption is higher.
It there is no multiple shafting high speed ultrahigh pump lift centrifugal pump both at home and abroad at present.
Summary of the invention
The technical problem to be solved by the utility model is to converting parallel multiaxis for original elongated flexible single shafting
It is rigid rotator, effectively solves the problems such as rotor crosses critical problem bring rotor unstability, vibration, the stabilization of lifting means operation
Property, and a kind of multiple shafting high-lift centrifugal pump is provided.
To achieve the above object, the technical solution of the utility model is: a kind of multiple shafting high-lift centrifugal pump, including former dynamic
Machine, prime mover main shaft, low-speed gear, two high gears, two centrifugal pumps, two centrifugal pumps are separately mounted to pump seat lower part,
Described prime mover is connect by prime mover main shaft with low-speed gear, and low-speed gear is engaged simultaneously with two high gears and connect, and two
A high gear is connect with the pump shaft of two centrifugal pumps respectively, and outlet is equipped on the outside of a centrifugal pump, and inside is equipped with import, import
It is connected by connecting component with the outlet on the inside of another centrifugal pump, another centrifugal pump lower end is equipped with import.
Further, the pump shaft upper end is connected in pump seat by bearing support.
Further, sealing device is connected between pump seat in the middle part of the pump shaft.
Further, the pump shaft is located at sealing device lower part equipped with balancing device.
The beneficial effects of the utility model are:
The high-lift multi-stage centrifugal pump that the multiple shafting of the utility model is run parallel, compared to former single shafting centrifugal multistage pump multiple centrifugal pump tool
It has the advantage that
1, the hydraulic efficiency for improving single-stage impeller, to reduce energy consumption；
2, each shafting design difficulty and manufacturing cost are greatly reduced；
3, shafting and complete machine operation stability are substantially improved.
Detailed description of the invention
Fig. 1 is the multiple shafting high-lift centrifugal pump structural schematic diagram of the utility model.
Specific embodiment
The core technology of the utility model is the application of multiple shafting ultrahigh pump lift centrifugal pump.By the structure in Fig. 1 to this
Utility model is specifically described, but it is important to point out that, embodiment is served only for carrying out furtherly the utility model
It is bright, it should not be understood as the limitation to scope of protection of the utility model, person skilled in art is according to above-mentioned the utility model
Content make some nonessential modifications and adaptations carry out specific implementation be not required to make the creative labor.
As shown in Figure 1, a kind of multiple shafting high-lift centrifugal pump, comprising: prime mover 1, prime mover main shaft 2, low-speed gear B3,
High gear B4, pump shaft B5, bearing B6, sealing device B7, balancing device B8, centrifugal pump B9, outlet B10, import B11, connection
Component 12, outlet A13, import A14, centrifugal pump A15, balancing device A16, sealing device A17, bearing A18, pump shaft A19, high speed
Gear A 20.Prime mover 1 is connect by prime mover main shaft 2 with low-speed gear B3, low-speed gear B3 and high gear B4 and high speed tooth
The engagement connection of A20 is taken turns, pump shaft B5 and the upper end pump shaft A19 pass through bearing B6 and bearing A18 support respectively and are connected in pump seat, pump
Sealing device B7 and sealing device A17, sealing device B7 and sealing are connected separately between pump seat in the middle part of axis B5 and pump shaft A19
The lower part device A17 is respectively equipped with balancing device B8 and balancing device A16.Be equipped with outlet B10 on the outside of centrifugal pump B9, inside be equipped with into
Mouthful B11, import B11 are connected by connecting component 12 with the outlet A13 on the inside of centrifugal pump A15, the lower end centrifugal pump A15 equipped with into
Mouth A14.
Low-speed gear B3 drives pump shaft B5 and pump shaft A19 rotation by the engagement of high gear B4 and high gear A20.Stream
Body is entered by import A14 improves pressure in centrifugal pump A15, high-pressure fluid passes through outlet A13, connecting component 12, import B11 again
Pressure is improved in into centrifugal pump B9, finally from outlet B10 outflow.Balancing device B8 and balancing device A16 are respectively intended to balance
The axial force of centrifugal pump B9 and centrifugal pump A15.Bearing B6 is used to balance the radial force of pump shaft B5 and the residue axial direction of centrifugal pump B9
Thrust；Bearing A18 is used to balance the radial force of pump shaft A19 and the remaining axial thrust of centrifugal pump A15.Sealing device B7 and sealing
Device A17 is used to prevent the high-pressure fluid in centrifugal pump B9 and centrifugal pump A15 from revealing.
The utility model provides a kind of high-lift centrifugal pump of multiple shafting operation, by prime mover (motor, steam turbine or combustion
Gas-turbine etc.) pass through the centrifugal multistage pump multiple centrifugal pump of gear up (or direct, deceleration) driving multiple shafting.Complicated flex rotor is converted
For more rigid rotators, rotor and overall design and manufacture difficulty are reduced.It is minimized at centrifugal pump impeller when rigid rotator
The minimum diameter of axle reduces impeller inlet diameter, and hydraulic efficiency can be improved, and reduces energy consumption.
Claims (4)
1. a kind of multiple shafting high-lift centrifugal pump, including prime mover, prime mover main shaft, low-speed gear, two high gears, two
Centrifugal pump, it is characterised in that: two centrifugal pumps are separately mounted to pump seat lower part, and described prime mover passes through prime mover main shaft and low speed
Gear connection, low-speed gear engages simultaneously with two high gears and connect, two high gears pump with two centrifugal pumps respectively
Axis connection, equipped with outlet, inside is equipped with import in a centrifugal pump outside, and import passes through connecting component and another centrifugal pump inside
Outlet be connected, another centrifugal pump lower end be equipped with import.
2. multiple shafting high-lift centrifugal pump according to claim 1, it is characterised in that: the pump shaft upper end passes through bearing branch
Support is connected in pump seat.
3. multiple shafting high-lift centrifugal pump according to claim 1, it is characterised in that: in the middle part of the pump shaft between pump seat
It is connected with sealing device.
4. multiple shafting high-lift centrifugal pump according to claim 3, it is characterised in that: the pump shaft is located under sealing device
Portion is equipped with balancing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821990835.6U CN209324681U (en) | 2018-11-29 | 2018-11-29 | Multiple shafting high-lift centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821990835.6U CN209324681U (en) | 2018-11-29 | 2018-11-29 | Multiple shafting high-lift centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209324681U true CN209324681U (en) | 2019-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821990835.6U Active CN209324681U (en) | 2018-11-29 | 2018-11-29 | Multiple shafting high-lift centrifugal pump |
Country Status (1)
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| CN (1) | CN209324681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404302A (en) * | 2018-11-29 | 2019-03-01 | 中国船舶重工集团公司第七0四研究所 | Multiple shafting high-lift centrifugal pump |
-
2018
- 2018-11-29 CN CN201821990835.6U patent/CN209324681U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404302A (en) * | 2018-11-29 | 2019-03-01 | 中国船舶重工集团公司第七0四研究所 | Multiple shafting high-lift centrifugal pump |
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