CN105351206A - Segmentation type multi-stage centrifugal pump - Google Patents
Segmentation type multi-stage centrifugal pump Download PDFInfo
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- CN105351206A CN105351206A CN201510875525.4A CN201510875525A CN105351206A CN 105351206 A CN105351206 A CN 105351206A CN 201510875525 A CN201510875525 A CN 201510875525A CN 105351206 A CN105351206 A CN 105351206A
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- China
- Prior art keywords
- impeller
- stage
- pump shaft
- sliding bearing
- centrifugal pump
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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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/063—Multi-stage pumps of the vertically split casing type
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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
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
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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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/0462—Bearing cartridges
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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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/049—Roller bearings
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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
- F04D29/06—Lubrication
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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
- F04D29/18—Rotors
- F04D29/185—Rotors consisting of a plurality of wheels
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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
- F04D29/18—Rotors
- F04D29/20—Mounting rotors on shafts
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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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
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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
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid 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
- F04D29/40—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
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
- F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
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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
- F04D29/66—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
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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
- F05D2240/00—Components
- F05D2240/10—Stators
- F05D2240/12—Fluid guiding means, e.g. vanes
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 segmentation type multi-stage centrifugal pump. The segmentation type multi-stage centrifugal pump comprises a sucking section, a first-stage impeller, impeller guide blades, a middle section, a second-stage impeller, a discharging section, a pump shaft, a shaft sleeve, an impeller spacer ring, a sliding bearing connected to the outer side of the shaft sleeve in a sleeving mode, a rolling bearing, an elastic connector connected with the pump shaft and an external prime mover driving the pump shaft to rate through the elastic connector. A plurality of spiral grooves are formed in the inner wall of the sliding bearing; the impellers are assembled on the pump shaft in a key-connection mode; the impeller guide blades are assembled in the middle section. Liquid is pressurized through the impellers and collected through the impeller guide blades, the flow speed is lowered, and the liquid is discharged through the discharging section and fed into a pipeline system. The spiral grooves in the inner wall of the sliding bearing increase the circulation amount of fluid and guarantee good lubrication of the sliding bearing, and therefore the friction power consumption between the shaft sleeve and the sliding bearing is lowered, and the mechanical efficiency of the centrifugal pump is improved. The heat caused by friction between the sliding bearing and the shaft sleeve is taken away in time, the service life of the sliding bearing is prolonged, and safe and reliable operation of the centrifugal pump is guaranteed.
Description
Technical field
The present invention relates to the Liquid transfer such as industry, agricultural field, particularly relate to the sectional multi-stage centrifugal pump of a kind of sliding bearing and vertical installation.
Background technique
Sectional multi-stage centrifugal pump is that multiple impeller is installed series operation on a shaft, and on axle, namely impeller number represents the progression of pump.Sectional multistage pump structure is generally divided into suction casing, stage casing (middle hop count is that impeller number subtracts 1) and discharges section, and each section is linked to be an entirety with turnbuckle.The suction port of sectional multi-stage centrifugal pump arranges in the same direction, and liquid in the past one stage impeller enters next stage impeller inlet through stator after flowing out, and energy is increased step by step, flows out finally by discharge section.
The vertical mounting design of the many employings of sectional multi-stage centrifugal pump, saves space, easy for installation.Not on the same axis, bottom feed liquor, top fluid, suction casing, stage casing are connected by turnbuckle with discharge section the liquid entrance of centrifugal pump.Centrifugal pump is connected by elastic coupling with motor, and sealing generally adopts mechanical seal.Sectional multi-stage centrifugal pump is applied to industry, the conveying of agricultural liquid and urban water supply and sewerage, tall building pressurized water supply, fire fighting pressurization, long distance water and boiler feed water etc.
In prior art, there is the inconvenient problem of maintenance in sectional multi-stage centrifugal pump, maintenance or change sliding bearing and mechanical seal very inconvenient, usually need the pump housing to dismantle, bring a lot of difficulty to maintenance.On the other hand, the circle structure being generally Cuprum alloy with sliding bearing that sectional multi-stage centrifugal pump is adopted, under high speed operation or severe duty, insufficient owing to lubricating, sliding bearing is easy to owing to lubricating insufficient and damages.The Curve guide impeller current for sliding bearing mainly contains both direction: one is in Cuprum alloy, embed some graphite, improves its wear-resisting and greasy property; Two is inside sliding bearing, open several straight flute, improves its greasy property by increasing liquid circulation amount.For the first scheme, owing to embedded in graphite, have certain improvement to the greasy property of sliding bearing, the wear-resisting property of bearing also improves, but fails fundamentally to solve the insufficient problem of lubrication.For first scheme, due to by the circulating load regulating the cross-section area of groove to control fluid, the problem that lubrication is insufficient can be solved completely.But sectional multi-stage centrifugal pump in the course of the work, the straight flute of axle sleeve on sliding bearing, there is no the bearing capacity that enough lubricating films provide enough, lubricating oil breakdown near sliding bearing groove, solid is caused to contact with the direct of solid, thus produce collision, the frequency of pump shaft axle sleeve and the collision of sliding bearing groove is the rotational frequency of pump shaft axle sleeve and the product of sliding bearing inner wall trench quantity, thus, band is served negative problem by the constant collision of pump shaft axle sleeve and sliding bearing groove: one is cause the vibrating noise of sectional multi-stage centrifugal pump to increase, two is that the sliding bearing life causing its suction side to support declines.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of sliding bearing and sectional multi-stage centrifugal pump, to reduce the noise of centrifugal pump, increasing the operating life of sliding bearing, and increasing reliability and the working life of sectional multi-stage centrifugal pump.
For achieving the above object, technological scheme of the present invention is as follows:
The invention provides a kind of sectional multi-stage centrifugal pump, comprising:
The base axially connected successively from the bottom to top, suction casing, stage casing, discharge section, prime mover support and prime mover; Bearing support is provided with in described base; Described prime mover support is for connecting prime mover and centrifugal pump mechanical part; Described prime mover is used for liquid pumping to given height as prime mover;
Pump shaft, be axially contained in described suction casing, stage casing and discharge section, described pump shaft is socketed with first stage impeller, secondary impeller, impeller, axle sleeve and wheel space ring;
Described prime mover is connected with described pump shaft by elastomeric connectors such as coupling, and power is delivered to described secondary impeller and first stage impeller by described pump shaft, thus drives described pump shaft to rotate by elastomeric connector described in prime mover driven;
Axle sleeve, being socketed in one end near described bearing support on described pump shaft, wearing and tearing for preventing described pump shaft;
Sliding bearing, to be assemblied in described bearing support and to be socketed in outside described axle sleeve, for pump shaft described in sliding support, described sliding bearing inwall having many spiral grooves;
Rolling bearing, is socketed in one end near elastomeric connector on described pump shaft, for pump shaft described in rolling support;
Described suction casing is assemblied on described base, and in described suction casing, the circulation passage of liquid is runner, and the oral area of described runner is suction port;
Described stage casing is assemblied in suction casing and discharges in the middle of section for assembling impeller vane;
Described discharge section to be assemblied between described stage casing and prime mover support and to be connected with described prime mover support, and is provided with mechanical seal between described discharge section and pump shaft; In described discharge section, liquid communication part is runner, and the oral area of described runner is exhaust port;
Described first stage impeller is linked and packed on described pump shaft near one end of sliding bearing by key, described pump shaft drives described first stage impeller to rotate, thus the liquid pressing imported from described suction casing is delivered to described impeller vane, because described first stage impeller exists the risk of cavitation, described first stage impeller is the impeller of sacrificing hydraulic efficiency and particular design for obtaining good cavitation performance;
Described secondary impeller and impeller all by wheel space annulate shaft to orientation assemble on described pump shaft.Because liquid is pressurizeed by described first stage impeller, described secondary impeller does not have the risk of cavitation, and therefore described secondary impeller is the impeller designed for obtaining good hydraulic efficiency;
Described wheel space annulate shaft is to being set on described pump shaft, and axially between described first stage impeller and secondary impeller, between described secondary impeller and secondary impeller and between described secondary impeller and impeller, for separating impeller and ensureing the axially locating of impeller on described pump shaft;
Described impeller vane radially loading fits in described stage casing, and radial direction is between described first stage impeller and secondary impeller, between described secondary impeller and secondary impeller and between described secondary impeller and impeller, the liquid pressurizeed through described impeller is collected by described impeller vane and is reduced flow velocity, and enters next stage impeller and continue pressurization.
Wherein, described sliding bearing inwall has many spiral grooves, and the cross section of described spiral grooves is triangle or circular arc.
Wherein, the impeller being assemblied in described suction side is described first stage impeller, and described secondary impeller is between described first stage impeller and mechanical seal, and described first stage impeller and secondary impeller are and obtain good cavitation performance and particular design.
Further, described first stage impeller and secondary impeller all have hydraulic equilibrium hole for axial equilibrium of forces, thus do not need similar balancing drum device balancing axial thrust.
Wherein, described impeller is separated by described wheel space ring and is carried out axially locating, and described wheel space ring is positioned on described pump shaft by back-up ring.
Further, described base is divided into dismountable supporting base and bottom, and described bearing seat is in described supporting base, and described bottom has boss to support described bearing support, thus the dismounting pump housing can not needed by dismantling described bottom from bottom just can to change described sliding bearing, being convenient to safeguard.
Further, described mechanical seal to be set on described pump shaft and between described discharge section and pump shaft, and described discharge section is stretched out to facilitate directly from described discharge section dismounting in described mechanical seal local, thus need not dismantle the pump housing and just can keep in repair or change described mechanical seal, be convenient to safeguard.
Wherein, described prime mover is prime mover of motor or other types, and as internal-combustion engine, when adopting motor, then prime mover support is electric machine support.
Further, described suction casing with discharge the equal 360 degree circumferences of section and rotate and install, fluid intake and exhaust port direction adjustable, the pipe-line system of different direction installation can be adapted to.
Further, described discharge section adopts scroll casing shape structure, can improve the efficiency of centrifugal pump on the one hand, can remove impeller vane described in final stage on the other hand, reduces complexity and the product cost of product.
The present invention can regulate the liquid circulation amount by sliding bearing by the cross-section area of adjusting color screw groove; enough fluids can be provided to guarantee the good lubrication of sliding bearing on the one hand; on the other hand; the fluid of circulation can be taken away on sliding bearing timely due to fricative heat; improve performance and the life-span of sliding bearing, ensure the safe and reliable operation of sectional multi-stage centrifugal pump.
Bearing support of the present invention can be dismantled from the bottom of base, so need not dismantle the pump housing just can change sliding bearing, is convenient to safeguard.
Mechanical seal of the present invention can directly be dismantled above discharge section, just can keep in repair so need not dismantle the pump housing or change mechanical seal, is convenient to safeguard.
Suction casing of the present invention and discharge section can rotate arbitrarily in circumference, so can adapt to the installation of multiple different direction pipe-line system.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described.
Fig. 1 is the schematic diagram of sectional multi-stage centrifugal pump of the present invention;
Fig. 2 is the schematic diagram of sliding bearing of the present invention;
Fig. 3 is the sectional view of sliding bearing of the present invention;
Fig. 4 is the partial schematic diagram of sliding bearing of the present invention.
Numeral in figure:
1. base 2. bearing support 3. axle sleeve
4. sliding bearing 5. suction casing 6. back-up ring
7. pump shaft 8. wheel space ring 9. first stage impeller
10. impeller vane 11. stage casing 12. secondary impeller
13. discharge section 14. nut 15. bolt
16. mechanical seal 17. rolling bearing 18. coupling
19. electric machine support 20. motor 21. suction ports
22. exhaust ports
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described.
Fig. 1 is the schematic diagram of sectional multi-stage centrifugal pump of the present invention, as shown in the figure, sectional multi-stage centrifugal pump of the present invention specifically comprises: base 1, bearing support 2, axle sleeve 3, sliding bearing 4, suction casing 5, back-up ring 6, pump shaft 7, wheel space ring 8, first stage impeller 9, impeller vane 10, stage casing 11, secondary impeller 12, discharge section 13, mechanical seal 16, rolling bearing 17, coupling 18, electric machine support 19 and motor 20, wherein discharge section 13 to be connected with electric machine support 19 by bolt 15 nut 14, and sealed by mechanical seal 16 between discharge section 13 and pump shaft 7.
Sectional multi-stage centrifugal pump is arranged on basis by clamping bolt by base 1.Pump shaft 7 is axially contained in suction casing 5, stage casing 11 and discharges in section 13, and pump shaft 7 is socketed with axle sleeve 3 and wheel space ring 8; Sliding bearing 4 is contained in bearing support 2, and is socketed in outside axle sleeve 3; The pump shaft 7 of suction casing 5 adopts sliding bearing 4 to support by axle sleeve 3, and the pump shaft 7 of motor 20 one end adopts rolling bearing 17 to support; Wheel space ring 8 is positioned on pump shaft 7 by back-up ring 6, and first stage impeller 9 and secondary impeller 12 are by wheel space ring 8 axially locating and be linked and packed on pump shaft 7 by key.
Axle sleeve 3 needs to be assemblied on pump shaft 7, and therefore its requirement on machining accuracy is higher; Major function due to wheel space ring 8 is the axially locating between impeller, and therefore its machining accuracy is relatively lower.
Concrete, the first order impeller of sectional multi-stage centrifugal pump suction casing 5 is first stage impeller 9, toward motor drive direction, there is multiple secondary impeller 12 successively, last impeller is impeller, wherein, in order to improve the cavitation erosion performance of sectional multi-stage centrifugal pump, first stage impeller 9 is particular design, and the design of secondary impeller and impeller is identical.
Impeller vane 10 after first stage impeller 9 is chopped-off head impeller vane, impeller vane 10 in like manner after secondary impeller 12 is secondary impeller stator, impeller vane 10 after impeller is impeller stator, and in order to reduce the complexity of product, impeller vane generally adopts identical design.
Impeller vane 10 is energy transmission device of sectional multi-stage centrifugal pump, its effect is that first stage impeller 9, secondary impeller 12 are thrown away the liquid collection come, the flow velocity of liquid is reduced, be introduce next stage impeller equably again after pressure energy part kinetic energy, impeller vane 10 makes liquid flow in continuous print streamline channel, not easily form dead angle and diffusion suddenly, liquid velocity change is relatively more even, and hydraulic performance is good.
Fig. 2-4 is respectively the perspective view of sliding bearing 4 of the present invention, sectional view and partial schematic diagram.As shown in the figure, the inwall 40 of sliding bearing 4 has many spiral grooves 41, spiral grooves 41 can be multiple, and cross section can be triangle or circular arc etc.
Therefore, when pump shaft 7 rotary sleeve 3 is when the sliding bearing 4 of spiral grooves 41, at any time, have enough lubricating film areas between axle sleeve 3 and sliding bearing 4 to provide enough bearing capacitys, the supporting plane of sliding bearing 4 is quasi-continuous, and the lubricating film between axle sleeve 3 and sliding bearing 4 can not break, thus there will not be the situation that solid and solid directly contact, thus can not produce extra vibration and noise, and liquid can be circulated by spiral grooves 41, ensure good lubrication; Meanwhile, fluid can be discharged fricative heat between pump shaft 7 axle sleeve 3 and sliding bearing 4 rapidly by spiral grooves 41, improves the working life of sliding bearing 4, thus improves the reliability of sectional multi-stage centrifugal pump.
According to different load working conditions, can be optimized by spiral grooves 41 sectional shape and size adjusting sliding bearing 4, ensure enough liquid circulation amounts, guarantee sectional multi-stage centrifugal pump safe and stable operation.
According to the requirement of fed sheet of a media, sectional multi-stage centrifugal pump of the present invention can select corresponding material, as stainless steel, Cuprum alloy, and the most high-liftly can reach more than 1000 meters.
The pump shaft 7 of sectional multi-stage centrifugal pump of the present invention is by coupling 18 by motor 20 Direct driver be supported on electric machine support 19, and pump shaft 7 drives first stage impeller 9 and middle multiple secondary impeller 12, liquid pumping to the height of specifying.Impeller vane 10 is assemblied in stage casing 11, first stage impeller 9 and secondary impeller 12 are assemblied on pump shaft 7, pump shaft 7 impeller is rotated, thus the liquid pressing will introduced from suction port 21, after liquid is pressurizeed by first stage impeller 9, collect through impeller vane 10 and reduce flow velocity and enter secondary impeller 12 continuation pressurization, the liquid of pressurization is collected through impeller vane 10 and is reduced flow velocity and enters the pressurization of afterbody impeller, and the liquid after pressurization is discharged section 13 by scroll casing shape and discharged feeding pipe-line system from exhaust port 22; The cross-section area of discharging section 13 due to scroll casing shape increases gradually along Way out, smooth transition, and flow rate of liquid reduces gradually, and pressure energy increases, and its airflow design ensures that hydraulic loss is less, thus ensures efficient the Hydraulic Design.
According to different lift demand, the quantity of secondary impeller 12 can from 0 to multiple.If the numerical value of required lift is not the integral multiple of Impeller Design lift, the diameter that can reduce impeller by Impeller trim realizes, lift be similar to impeller diameter square be directly proportional (concrete accurate corresponding relation is generally determined by experiment).
Sliding bearing 4 of the present invention and sectional multi-stage centrifugal pump, due to the effect of spiral grooves, can ensure enough liquid circulation amounts on the one hand, thus guarantee the good lubrication of sliding bearing 4; On the other hand circular flow physical efficiency is taken away pump shaft 7 timely and to be run up fricative heat between situation properties of journal bearing lubricated 4 and pump shaft 7 axle sleeve 3, thus improves the life-span of sliding bearing 4, ensures the safe and reliable operation of sectional multi-stage centrifugal pump.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a sectional multi-stage centrifugal pump, is characterized in that, comprising:
The base axially connected successively from the bottom to top, suction casing, stage casing, discharge section, prime mover support and prime mover; Bearing support is provided with in described base; Described prime mover support is for connecting prime mover and centrifugal pump mechanical part; Described prime mover is used for liquid pumping to given height;
Pump shaft, be axially contained in described suction casing, stage casing and discharge section, described pump shaft is socketed with first stage impeller, secondary impeller, impeller, axle sleeve and wheel space ring;
Described prime mover is connected with described pump shaft by elastomeric connector, and power is delivered to described secondary impeller and first stage impeller by described pump shaft, thus drives described pump shaft to rotate by elastomeric connector described in described prime mover driven;
Axle sleeve, being socketed in one end near described bearing support on described pump shaft, wearing and tearing for preventing described pump shaft;
Sliding bearing, to be assemblied in described bearing support and to be socketed in outside described axle sleeve, for pump shaft described in sliding support, described sliding bearing inwall having many spiral grooves;
Rolling bearing, is socketed in one end near described elastomeric connector on described pump shaft, for pump shaft described in rolling support;
Described suction casing is assemblied on described base, and in described suction casing, the circulation passage of liquid is runner, and the oral area of described runner is suction port;
Described stage casing is assemblied in suction casing and discharges in the middle of section for assembling impeller vane;
Described discharge section to be assemblied between described stage casing and prime mover support and to be connected with described prime mover support, and is provided with mechanical seal between described discharge section and pump shaft; In described discharge section, liquid communication part is runner, and the oral area of described runner is exhaust port;
Described first stage impeller is linked and packed near one end of described sliding bearing on described pump shaft by key, described pump shaft drives described first stage impeller to rotate, thus the liquid pressing imported from described suction casing is delivered to described impeller vane;
Described secondary impeller and impeller all by wheel space annulate shaft to orientation assemble on described pump shaft;
Described wheel space annulate shaft is to being set on described pump shaft, and axially between described first stage impeller and secondary impeller, between described secondary impeller and secondary impeller and between secondary impeller and impeller, for separating impeller and ensureing the axially locating of impeller on described pump shaft;
Described impeller vane radially loading fits in described stage casing, and radial direction is between described first stage impeller and secondary impeller, between described secondary impeller and secondary impeller and between secondary impeller and impeller.
2. sectional multi-stage centrifugal pump according to claim 1, is characterized in that, described sliding bearing inwall has many spiral grooves, and the cross section of described spiral grooves is triangle or circular arc.
3. sectional multi-stage centrifugal pump according to claim 2, is characterized in that, the impeller being assemblied in described suction side is described first stage impeller, and described secondary impeller is between described first stage impeller and mechanical seal.
4. sectional multi-stage centrifugal pump according to claim 1, is characterized in that, described first stage impeller and secondary impeller all have hydraulic equilibrium hole for axial equilibrium of forces.
5. sectional multi-stage centrifugal pump according to claim 1, is characterized in that, described impeller is separated by described wheel space ring and carried out axially locating, and described wheel space ring is positioned on described pump shaft by back-up ring.
6. sectional multi-stage centrifugal pump according to claim 1, it is characterized in that, described base is divided into dismountable supporting base and bottom, described bearing seat is in described supporting base, described bottom has boss to support described bearing support, thus the dismounting pump housing can not needed by dismantling described bottom from bottom just can to change described sliding bearing, being convenient to safeguard.
7. sectional multi-stage centrifugal pump according to claim 1, it is characterized in that, described mechanical seal to be set on described pump shaft and between described discharge section and pump shaft, and described discharge section is stretched out to facilitate directly from described discharge section dismounting in described mechanical seal local, thus need not dismantle the pump housing and just can keep in repair or change described mechanical seal, be convenient to safeguard.
8. sectional multi-stage centrifugal pump according to claim 1, is characterized in that, described prime mover is prime mover of motor or other types, as internal-combustion engine.
9. sectional multi-stage centrifugal pump according to claim 1, is characterized in that, described suction casing with discharge the equal 360 degree circumferences of section and rotate and install, fluid intake and exhaust port direction adjustable, the pipe-line system of different direction installation can be adapted to.
10. sectional multi-stage centrifugal pump according to claim 1, is characterized in that, described discharge section adopts scroll casing shape structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875525.4A CN105351206A (en) | 2015-12-02 | 2015-12-02 | Segmentation type multi-stage centrifugal pump |
| CN201610119473.2A CN105626540B (en) | 2015-12-02 | 2016-03-03 | Sectional multi-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875525.4A CN105351206A (en) | 2015-12-02 | 2015-12-02 | Segmentation type multi-stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105351206A true CN105351206A (en) | 2016-02-24 |
Family
ID=55327248
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510875525.4A Withdrawn CN105351206A (en) | 2015-12-02 | 2015-12-02 | Segmentation type multi-stage centrifugal pump |
| CN201610119473.2A Active CN105626540B (en) | 2015-12-02 | 2016-03-03 | Sectional multi-stage centrifugal pump |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610119473.2A Active CN105626540B (en) | 2015-12-02 | 2016-03-03 | Sectional multi-stage centrifugal pump |
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| CN (2) | CN105351206A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178520A (en) * | 2017-08-02 | 2017-09-19 | 汪小艳 | A kind of method and combined elastic sealing device for improving centrifugal water pump operational efficiency |
| CN107575392A (en) * | 2016-07-05 | 2018-01-12 | 苏州赟羽机电科技有限公司 | Jing Yin centrifugal multistage pump multiple centrifugal pump |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107461339A (en) * | 2016-06-03 | 2017-12-12 | 苏州赟羽机电科技有限公司 | A kind of intelligent centrifugal multistage pump multiple centrifugal pump |
| CN107575393A (en) * | 2016-07-05 | 2018-01-12 | 苏州赟羽机电科技有限公司 | A kind of sectional type intelligence centrifugal multistage pump multiple centrifugal pump |
| CN109185217A (en) * | 2018-11-28 | 2019-01-11 | 无锡艾比德泵业有限公司 | A kind of suction inlet is the water inlet segment structure of the centrifugal multistage pump multiple centrifugal pump of fish mouth type |
| CN110131215B (en) * | 2019-06-05 | 2024-02-09 | 广州市昕恒泵业制造有限公司 | Flow guiding body structure for pump |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08214495A (en) * | 1995-01-31 | 1996-08-20 | Ebara Corp | Rotary machine |
| CN2371372Y (en) * | 1999-05-18 | 2000-03-29 | 曹伟祥 | Handy detachable vertical multi-stage centrifugal pump |
| CN2434451Y (en) * | 2000-07-18 | 2001-06-13 | 上海凯泉泵业（集团）有限公司 | Ease-to-repair vertical multi-stage centrifugal pump |
| CN201627724U (en) * | 2010-03-19 | 2010-11-10 | 上海莲盛泵业制造有限公司 | Vertical multi-stage centrifugal pump |
| CN204226258U (en) * | 2014-08-04 | 2015-03-25 | 威乐(中国)水泵系统有限公司 | Sliding bearing and multistage centrifugal pump |
| CN205401146U (en) * | 2015-12-02 | 2016-07-27 | 池泉 | Festival segmentation multistage centrifugal pump |
-
2015
- 2015-12-02 CN CN201510875525.4A patent/CN105351206A/en not_active Withdrawn
-
2016
- 2016-03-03 CN CN201610119473.2A patent/CN105626540B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107575392A (en) * | 2016-07-05 | 2018-01-12 | 苏州赟羽机电科技有限公司 | Jing Yin centrifugal multistage pump multiple centrifugal pump |
| CN107178520A (en) * | 2017-08-02 | 2017-09-19 | 汪小艳 | A kind of method and combined elastic sealing device for improving centrifugal water pump operational efficiency |
| CN107178520B (en) * | 2017-08-02 | 2023-06-23 | 汪小艳 | Method for improving operation efficiency of centrifugal water pump and combined elastic sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105626540A (en) | 2016-06-01 |
| CN105626540B (en) | 2018-01-30 |
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Application publication date: 20160224 |