CN105485022B - Sectional multi-stage centrifugal pump - Google Patents
Sectional multi-stage centrifugal pump Download PDFInfo
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- CN105485022B CN105485022B CN201610041802.6A CN201610041802A CN105485022B CN 105485022 B CN105485022 B CN 105485022B CN 201610041802 A CN201610041802 A CN 201610041802A CN 105485022 B CN105485022 B CN 105485022B
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- Prior art keywords
- impeller
- stage
- pump
- pump shaft
- shaft
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
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- 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
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- 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
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4293—Details of fluid inlet or outlet
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- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
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- 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/01—Purpose of the control system
- F05D2270/20—Purpose of the control system to optimize the performance of a machine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/301—Pressure
- F05D2270/3013—Outlet pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of sectional multi-stage centrifugal pumps being equipped with adjustable vane device, including：Suction casing, first stage impeller, adjustable vane device, stage casing, secondary impeller, discharge section, pump shaft, axle sleeve, wheel space ring, sliding bearing, rolling bearing, elastomeric connector and external prime mover；Impeller is assemblied in by key connection on pump shaft；Adjustable vane device is assemblied in stage casing, collects and reduce flow velocity by adjustable vane device by impeller fluid under pressure, and pipe-line system is sent by the way that section discharge is discharged.The adjustable vane device of the invention adjusts the angle of guide vane according to the pressure of exit of pump, thus water pump all operates in efficiency optimization operating point under arbitrary operating mode, improve the hydraulic efficiency under water pump sub-load and excess load operating mode, improve water pump system, the especially operational efficiency of frequency conversion or flow-changing water pumping system saves water pump system energy consumption.
Description
Technical field
The present invention relates to the liquid such as industry, agricultural transportation art more particularly to a kind of sectional multi-stage centrifugal pumps and its can
Adjust vane apparatus.
Background technology
Sectional multi-stage centrifugal pump is that multiple impellers are installed tandem working on a shaft, and impeller number represents pump on axis
Series.Sectional multistage pump configuration is generally divided into inlet segment, stage casing (middle hop count subtract 1 for impeller number) and water exit end, each section
It is linked to be an entirety with turnbuckle.Sectional multi-stage centrifugal pump suction inlet arranges in the same direction, and liquid is from preceding one stage impeller
Enter next stage impeller inlet through guide vane after outflow, energy is made to increase step by step, is most flowed out afterwards through water exit end.
Sectional multi-stage centrifugal pump mostly uses vertical mounting design to save space, easy for installation.Water pump inlet and outlet do not exist
On same axis, lower part water inlet, top water outlet, and inlet segment, stage casing and water exit end are connected by turnbuckle；Water pump and motor
Pass through elastic coupling（Usually shaft coupling）Connection；Sealing generally uses mechanical seal.Sectional multi-stage centrifugal pump is applied to
Industry, the conveying of agricultural liquid and urban water supply and sewerage, skyscraper pressurized water supply, fire fighting pressurization, it is remote send water and boiler to
Water etc..
In addition, with the development of industry, environmental pollution is increasingly severe, thus the requirement to carbon emission is increasingly stringenter,
This just forces product constantly to upgrade, and constantly provides energy-efficient solution.In water pump system field, currently used side
Method is to use converter technique, and converter technique is energy saving to water pump system to be made that prodigious contribution, however the design of water pump be according to
Rated point optimization design（I.e. in metered flow, the efficiency highest of water pump）, when water pump deviates rated point work, i.e., negative in part
It is less efficient under lotus and overload conditions, and deviation metered flow is remoter, and efficiency declines more.
The purpose of the present invention is for less efficient under existing sectional multi-stage centrifugal pump sub-load and overload conditions
Technological deficiency, it is proposed that a kind of adjustable vane device, and the novel sectional multi-stage centrifugal pump using the adjustable vane device.
Wherein, adjustable vane device adjusts the angle of guide vane according to the pressure of exit of pump, thus water pump is in arbitrary operating mode
Under all operate in efficiency optimization operating point, improve the hydraulic efficiency under water pump sub-load and excess load operating mode, improve water
The operational efficiency of pumping system, especially frequency conversion or flow-changing water pumping system saves water pump system energy consumption.
Invention content
To achieve the above object, it the present invention provides a kind of adjustable vane device, is used to be believed according to water pump discharge pressure
Number guide vane angle is adjusted, thus improves operational efficiency of the water pump under sub-load and overload conditions comprising：Feedback signal
Processor, driving device, power transfer mechanism, drive shaft, bent axle, driving guide groove, guide vane drive disk, guide vane, guide vane guide shaft and
Guide vane guide groove；The feedback signal processor receives the pressure signal that water pump discharge pressure sensor transmits and by handling,
So that it is determined that the deflection angle of the guide vane；Power is transmitted to the drive by the driving device by the power transfer mechanism
Moving axis, the drive shaft drives the bent axle to be slided in the driving guide groove, to drive the guide vane drive disk clockwise
Or it rotates in an anti-clockwise direction；The guide vane guide groove is rotated with the rotation of the guide vane drive disk, and the guide vane guide shaft exists
Sliding drives the guide vane direction pivots clockwise or counter-clockwise rotation in the guide vane guide groove.
The adjustable vane device adjusts the angle of guide vane according to the pressure of exit of pump, thus water pump is under arbitrary operating mode
Efficiency optimization operating point is all operated in, the hydraulic efficiency under water pump sub-load and excess load operating mode is improved.
For given the Hydraulic Design, pressure and flow are that one-to-one, i.e., different pressure corresponds to different stream
Amount, different flows corresponds to different impeller liquid exit velocities, when the angle of guide vane is consistent with fluid outlet directional velocity,
Hydraulic loss is minimum, hydraulic efficiency highest.Adjustable vane device is according to pressure sensor（It is typically mounted at exit of pump）Feedback
Signal adjustment guide vane angle, to ensure under arbitrary operating mode, water pump all optimization efficiency point run（Water pump discharge pressure
With the relationship of guide vane angle, is generally emulated and determined and through overtesting amendment by waterpower）.
The present invention also provides a kind of sectional multi-stage centrifugal pumps including above-mentioned adjustable vane device comprising：
Pedestal, inlet segment, stage casing, water exit end, prime mover holder and the prime mover axially connected successively from the bottom to top；It is described
Bearing block is provided in pedestal；Prime mover holder is for connecting prime mover and centrifugal pump mechanical part；Described prime mover is used
In liquid pumping to given height；
Pump shaft is axially accommodated in the inlet segment, stage casing and water exit end, and the pump shaft is socketed with first stage impeller, secondary
Impeller, impeller, axle sleeve and wheel space ring；
Described prime mover is connect by elastomeric connector with the pump shaft, and power is transmitted to described time by the pump shaft
Grade impeller and first stage impeller, to by elastomeric connector described in the prime mover driven and the pump shaft be driven to rotate；
Axle sleeve is socketed in one end close to the bearing block on the pump shaft, for preventing the pump shaft from wearing；
Sliding bearing is assemblied in the bearing block and is socketed on the outside of the axle sleeve, for slidably supporting the pump shaft,
It is provided with a plurality of spiral grooves on the sliding bearing inner wall；
Rolling bearing is socketed in one end close to the elastomeric connector on the pump shaft, described in rolling support
Pump shaft；
On the base, the circulation passage of liquid is runner, the runner in the inlet segment for the inlet segment assembly
Oral area be suction inlet；
The stage casing is assemblied among inlet segment and water exit end for assembling above-mentioned adjustable vane device comprising：Instead
Feedback signal processor, driving device, power transfer mechanism, drive shaft, bent axle, driving guide groove, guide vane drive disk, guide vane, guide vane
Guide shaft and guide vane guide groove；The feedback signal processor receives the pressure signal that water pump discharge pressure sensor transmits and process
Processing, so that it is determined that the deflection angle of the guide vane；The driving device is transmitted to power by the power transfer mechanism
The drive shaft, the drive shaft drives the bent axle to be slided in the driving guide groove, to drive the guide vane drive disk
Direction pivots clockwise or counter-clockwise rotates；The guide vane guide groove rotates, the guide vane with the rotation of the guide vane drive disk
Guide shaft slides in the guide vane guide groove drives the guide vane direction pivots clockwise or counter-clockwise rotation；
The water exit end is assemblied between the stage casing and prime mover holder and is connect with prime mover holder, and described
Mechanical seal is provided between water exit end and pump shaft；Liquid communication part is runner, the oral area of the runner in the water exit end
For outlet；
The first stage impeller is assemblied in one end on the pump shaft close to the sliding bearing, the pump shaft by key connection
The first stage impeller is driven to rotate, to by the liquid pressing imported from the inlet segment and be delivered to the adjustable vane dress
It sets；
The secondary impeller and impeller are assemblied in by wheel space ring axially position on the pump shaft；
The wheel space annulate shaft to being set on the pump shaft, and be axially located the first stage impeller and secondary impeller it
Between, between the secondary impeller and secondary impeller and between secondary impeller and impeller, for separating impeller and ensureing leaf
Take turns the axially position on the pump shaft；
The adjustable vane device is radially assemblied in the stage casing, and is radially disposed in the first stage impeller and secondary impeller
Between, between the secondary impeller and secondary impeller and between secondary impeller and impeller.
Wherein, the impeller for being assemblied in the suction side is the first stage impeller, and the secondary impeller is located at the chopped-off head leaf
Between wheel and mechanical seal.
Further, it is provided with balance of the hydraulic equilibrium hole for axial force in the first stage impeller and secondary impeller.
Wherein, the impeller separates by the wheel space ring and carries out axially position, and the wheel space ring is logical
Baffle ring is crossed to be located on the pump shaft.
Further, the pedestal is divided into dismountable support base and bottom cover, the bearing seat in the support base,
The bottom cover has boss to support the bearing block, thus can be by dismantling the bottom cover without dismantling the pump housing from bottom
The sliding bearing can be replaced, convenient for safeguarding.
Wherein, the mechanical seal is set on the pump shaft and between the water exit end and pump shaft, and the machine
Tool sealing part is stretched out the water exit end and is directly dismantled from the water exit end with facilitating, thus can be repaired without the dismounting pump housing
Or the mechanical seal is replaced, convenient for safeguarding.
Wherein, described prime mover is motor or other kinds of prime mover, such as internal combustion engine.
Further, the inlet segment circumferentially rotates installation, fluid intake and outlet direction with equal 360 degree of water exit end
It is adjustable, it is adapted to the pipe-line system of different directions installation.
Further, the water exit end uses scroll casing shape structure.
The present invention adjusts the angle of guide vane using adjustable guide vane mechanism according to the pressure of exit of pump, improves water pump part
Hydraulic efficiency under load and excess load operating mode improves the fortune of water pump system, especially frequency conversion or flow-changing water pumping system
Line efficiency saves water pump system energy consumption.
The bearing block of the present invention can be dismantled from the bottom of pedestal, so sliding axle can be replaced without the dismounting pump housing
It holds, convenient for safeguarding.
The present invention mechanical seal can dismantle directly from water exit end above, so do not have to dismantle the pump housing can repair or
Mechanical seal is replaced, convenient for safeguarding.
The inlet segment and water exit end of the present invention can be in circumferential arbitrary rotation, it is possible to adapt to a variety of different directions pipelines
The installation of system.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described.
Fig. 1 is the schematic cross-sectional view of sectional multi-stage centrifugal pump of the present invention；
Fig. 2 is the dimensional structure diagram of adjustable vane device of the present invention.
Digital representation in figure：
1. 2. bearing block of pedestal, 3. axle sleeve
4. 5. inlet segment of sliding bearing, 6. baffle ring
7. 8. wheel space ring of pump shaft, 9. first stage impeller
10. 11. stage casing of adjustable vane device, 12. secondary impeller
13. 14. nut of water exit end, 15. bolt
16. 17. rolling bearing of mechanical seal, 18. shaft coupling
19. 20. motor of electric machine support, 21. suction inlet
22. 1001. signal processor of outlet, 1002. driving device
1003. transmission mechanism, 1004. drive shaft 1005. drives guide groove
1006. drive disk, 1007. guide vane, 1008. guide vane guide shaft
1009. guide vane guide groove, 1010. bent axle
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes.
As shown in Figure 1, the sectional multi-stage centrifugal pump of the present invention specifically includes：Pedestal 1, bearing block 2, axle sleeve 3, sliding axle
Hold 4, inlet segment 5, baffle ring 6, pump shaft 7, wheel space ring 8, first stage impeller 9, adjustable vane device 10, stage casing 11, secondary impeller
12, water exit end 13, mechanical seal 16, rolling bearing 17, shaft coupling 18, electric machine support 19 and motor 20, wherein water exit end 13 are logical
It crosses 15 nut 14 of bolt to connect with electric machine support 19, and is sealed by mechanical seal 16 between water exit end 13 and pump shaft 7；Into
The circulation passage of liquid is runner in water section 5, and the oral area of runner is suction inlet 21；Liquid communication part is stream in water exit end 13
The oral area in road, runner is outlet 22.
On the basis of sectional multi-stage centrifugal pump is mounted on by pedestal 1 by fastening bolt.Pump shaft 7 is axial to be accommodated in inlet segment
5, in stage casing 11 and water exit end 13, pump shaft 7 is socketed with axle sleeve 3 and wheel space ring 8；Sliding bearing 4 is accommodated in bearing block 2,
And it is socketed in 3 outside of axle sleeve；The pump shaft 7 of inlet segment 5 is supported by axle sleeve 3 using sliding bearing 4, the pump shaft 7 of 20 one end of motor
It is supported using rolling bearing 17；Wheel space ring 8 is located in by baffle ring 6 on pump shaft 7；First stage impeller 9 and secondary impeller 12 are logical
It crosses 8 axially position of wheel space ring and is assemblied on pump shaft 7 by key connection.
Axle sleeve 3 needs to be assemblied on pump shaft 7, therefore its requirement on machining accuracy is higher；Due to the main work(of wheel space ring 8
Can be the axially position between impeller, therefore its machining accuracy is relatively lower.
Specifically, the first order impeller of sectional multi-stage centrifugal pump suction casing 5 is first stage impeller 9, successively toward motor drive direction
With multiple secondary impellers 12, the last one impeller is impeller, wherein in order to improve the cavitation erosion of sectional multi-stage centrifugal pump
Performance, first stage impeller 9 is special designing, and the design of secondary impeller and impeller is identical.
Adjustable vane device 10 after first stage impeller 9 is chopped-off head adjustable vane device, similarly adjustable after secondary impeller 12
Vane apparatus 10 is secondary adjustable vane apparatus, and the adjustable vane device 10 after impeller is final stage adjustable vane device, and
In order to reduce the complexity of product, adjustable vane device generally uses identical design.
Adjustable vane device 10 is the energy transmission device of sectional multi-stage centrifugal pump, its effect be first stage impeller 9,
Secondary impeller 12 throws away the liquid come and collects, and the flow velocity of liquid is made to reduce, and part kinetic energy is changed into after pressure energy again
Next stage impeller is introduced evenly, and adjustable vane device 10 makes liquid be flowed in continuous streamline channel, is not easy to form dead angle
With unexpected diffusion, liquid velocity variation is relatively uniform, and hydraulic performance is good.
Fig. 2 is the schematic diagram of adjustable vane device of the present invention.The feedback signal processor 1001 of adjustable guide vane mechanism first
It receives the pressure signal that water pump discharge pressure sensor transmits and passes through calculation process, so that it is determined that the deflection of guide vane 1007
Power is transmitted to drive shaft 1004 by angle, driving device 1002 first by power transfer mechanism 1003, and drive shaft 1004 drives
The sliding in driving guide groove 1005 of bent axle 1010, to drive 1006 direction pivots clockwise or counter-clockwise of guide vane drive disk to rotate,
Guide vane guide groove 1009 rotates, the slip band in guide vane guide groove 1009 of guide vane guide shaft 1008 with the rotation of guide vane drive disk 1006
It is negative to improve water pump part in efficiency optimization operating point for the 1007 direction pivots clockwise or counter-clockwise rotation of dynamic guide vane, water pump operation
Hydraulic efficiency under lotus and excess load operating mode.
According to the requirement of pumped (conveying) medium, corresponding material, such as stainless steel can be selected in sectional multi-stage centrifugal pump of the invention,
Copper alloy.And highest lift can reach 1000 meters or more.
The pump shaft 7 of the sectional multi-stage centrifugal pump of the present invention is by yielding coupling 18 by being supported on electric machine support 19
Prime mover 20 directly drives.Pump shaft 7 drives first stage impeller 9, intermediate multiple secondary impellers 12, liquid pumping to specified height
Degree.Adjustable vane device 10 is assemblied in stage casing 11.First stage impeller 9 and secondary impeller 12 are assemblied on pump shaft 7, and pump shaft 7 drives
Wheel rotation, the liquid pressing to be introduced from import.After liquid is pressurizeed by import by first stage impeller 9, led by adjustable
Leaf device 10, which is collected and reduces flow velocity and enter secondary impeller 12, to be continued to pressurize, and the liquid of pressurization is by the collection of adjustable vane device 10
And reduce flow velocity and enter the pressurization of afterbody impeller, the liquid after pressurization, which is discharged by scroll casing shape water exit end 13 from outlet, is sent into pipe
Road system.The cross-sectional area of scroll casing shape water exit end 13 gradually increases along export direction, smoothly transits, and flow rate of liquid is gradually reduced,
Pressure energy increases, and airflow design ensures that hydraulic loss is smaller, to ensure efficient the Hydraulic Design.
According to different lift demands, the quantity of secondary impeller 12 can be from 0 to multiple.If the numerical value of required lift is not
It is the integral multiple of Impeller Design lift, the diameter of impeller can be reduced by Impeller trim to realize, lift approximation and impeller are straight
Diameter it is square directly proportional（Specific accurate correspondence is generally determined by experiment）.
The adjustable vane device and sectional multi-stage centrifugal pump of the present invention is since adjustable vane device is according to exit of pump
Pressure adjusts the angle of guide vane, thus improves the hydraulic efficiency under water pump sub-load and excess load operating mode, improves water pump
The operational efficiency of system, especially frequency conversion or flow-changing water pumping system saves water pump system energy consumption.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (9)
1. a kind of sectional multi-stage centrifugal pump, which is characterized in that including：
Pedestal, inlet segment, stage casing, water exit end, prime mover holder and the prime mover axially connected successively from the bottom to top；The pedestal
Inside it is provided with bearing block；Prime mover holder is for connecting prime mover and centrifugal pump mechanical part；Described prime mover is used for handle
Liquid pumping is to given height；
Pump shaft is axially accommodated in the inlet segment, stage casing and water exit end, the pump shaft be socketed with first stage impeller, secondary impeller,
Impeller, axle sleeve and wheel space ring；
Described prime mover is connect by elastomeric connector with the pump shaft, and power is transmitted to the secondary leaf by the pump shaft
Wheel and first stage impeller, to by elastomeric connector described in the prime mover driven and the pump shaft be driven to rotate；
Axle sleeve is socketed in one end close to the bearing block on the pump shaft, for preventing the pump shaft from wearing；
Sliding bearing is assemblied in the bearing block and is socketed on the outside of the axle sleeve, described for slidably supporting the pump shaft
A plurality of spiral grooves are provided on sliding bearing inner wall；
Rolling bearing is socketed in one end close to the elastomeric connector on the pump shaft, for pump shaft described in rolling support；
On the base, the circulation passage of liquid is runner, the mouth of the runner in the inlet segment for the inlet segment assembly
Portion is suction inlet；
The stage casing is assemblied among inlet segment and water exit end for assembling adjustable vane device；
The adjustable vane device includes：Feedback signal processor, driving device, power transfer mechanism, drive shaft, bent axle, drive
Dynamic guide groove, guide vane drive disk, guide vane, guide vane guide shaft and guide vane guide groove；The feedback signal processor receives exit of pump pressure
The pressure signal and process that force snesor transmits are handled, so that it is determined that the deflection angle of the guide vane；The driving device passes through
Power is transmitted to the drive shaft by the power transfer mechanism, and the drive shaft drives the bent axle in the driving guide groove
Sliding, to drive the guide vane drive disk direction pivots clockwise or counter-clockwise to rotate；The guide vane guide groove is with the guide vane
The rotation of drive disk and rotate, the guide vane guide shaft slides in the guide vane guide groove drives the guide vane clockwise or the inverse time
Needle direction rotates；
The water exit end is assemblied between the stage casing and prime mover holder and is connect with prime mover holder, and the water outlet
It is provided with mechanical seal between section and pump shaft；Liquid communication part is runner in the water exit end, and the oral area of the runner is row
Outlet；
The first stage impeller is assemblied in one end on the pump shaft close to the sliding bearing by key connection, and the pump shaft drives
The first stage impeller rotation, to by the liquid pressing imported from the inlet segment and be delivered to the adjustable vane device；
The secondary impeller and impeller are assemblied in by wheel space ring axially position on the pump shaft；
The wheel space annulate shaft to being set on the pump shaft, and be axially located between the first stage impeller and secondary impeller,
Between the secondary impeller and secondary impeller and between secondary impeller and impeller, for separating impeller and ensureing that impeller exists
Axially position on the pump shaft；
The adjustable vane device is radially assemblied in the stage casing, and be radially disposed in the first stage impeller and secondary impeller it
Between, between the secondary impeller and secondary impeller and between secondary impeller and impeller.
2. sectional multi-stage centrifugal pump according to claim 1, which is characterized in that the impeller for being assemblied in the suction side is
The first stage impeller, the secondary impeller is between the first stage impeller and mechanical seal.
3. sectional multi-stage centrifugal pump according to claim 1, which is characterized in that on the first stage impeller and secondary impeller
It is provided with balance of the hydraulic equilibrium hole for axial force.
4. sectional multi-stage centrifugal pump according to claim 1, which is characterized in that the impeller passes through the wheel space
Ring separates and carries out axially position, and the wheel space ring is located in by baffle ring on the pump shaft.
5. sectional multi-stage centrifugal pump according to claim 1, which is characterized in that the pedestal is divided into dismountable support
Seat and bottom cover, for the bearing seat in the support base, the bottom cover has boss to support the bearing block, thus can be with
The sliding bearing can be replaced without dismantling the pump housing by dismantling the bottom cover from bottom, convenient for safeguarding.
6. sectional multi-stage centrifugal pump according to claim 1, which is characterized in that the mechanical seal is set in the pump
On axis and between the water exit end and pump shaft, and the mechanical seal locally stretches out the water exit end to facilitate directly from institute
Water exit end dismounting is stated, thus the mechanical seal can be repaired or replace without the dismounting pump housing, convenient for safeguarding.
7. sectional multi-stage centrifugal pump according to claim 1, which is characterized in that described prime mover is motor or other classes
Prime mover of type, such as internal combustion engine.
8. sectional multi-stage centrifugal pump according to claim 1, which is characterized in that the inlet segment and water exit end equal 360
Degree circumferentially rotates installation, and fluid intake and outlet direction are adjustable, is adapted to the pipe-line system of different directions installation.
9. sectional multi-stage centrifugal pump according to claim 1, which is characterized in that the water exit end uses scroll casing shape knot
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610041802.6A CN105485022B (en) | 2016-01-21 | 2016-01-21 | Sectional multi-stage centrifugal pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610041802.6A CN105485022B (en) | 2016-01-21 | 2016-01-21 | Sectional multi-stage centrifugal pump |
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| Publication Number | Publication Date |
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| CN105485022A CN105485022A (en) | 2016-04-13 |
| CN105485022B true CN105485022B (en) | 2018-10-23 |
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| CN201610041802.6A Active CN105485022B (en) | 2016-01-21 | 2016-01-21 | Sectional multi-stage centrifugal pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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