CN101892991B - Horizontal type multi-stage pump without leakage - Google Patents
Horizontal type multi-stage pump without leakage Download PDFInfo
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- CN101892991B CN101892991B CN2010102391976A CN201010239197A CN101892991B CN 101892991 B CN101892991 B CN 101892991B CN 2010102391976 A CN2010102391976 A CN 2010102391976A CN 201010239197 A CN201010239197 A CN 201010239197A CN 101892991 B CN101892991 B CN 101892991B
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Abstract
The invention relates to a horizontal type multi-stage pump without leakage. A suction inlet and an exhaust port of liquid are formed on a water inlet section and a water outlet section; two center lines of the suction inlet and the exhaust port of the liquid are positioned on the same cross section which is perpendicular to the axial lead of the pump; a water inlet of each stage of impeller faces to the left, and one impeller and one guide vane are connected end to end to form a first-stage flow passage component; all stages of flow passage components are connected in series sequentially; a sealing ring is arranged on each impeller back shroud; an inflowing annular channel is formed between a barrel and a middle section; a water inlet channel is formed on the end section of a primary-stage impeller water inlet and is communicated with the inflowing annular channel; a clearance seal and a composite straight-through labyrinth seal are reserved between an orifice sleeve and a shaft sleeve; a pressure relief backflow hole is formed at the rear end of the orifice sleeve and is directly communicated with the suction inlet; and the top end of a stuffing box is connected with a pressure reducing ring, and an unloading groove is formed on the pressure reducing ring and is communicated with the pressure relief backflow hole through an unloading hole. The horizontal type multi-stage pump without leakage has the advantages of no leakage at water inlet and water outlet ends, stable operation and convenient arrangement, installation and overhauling of system pipelines.
Description
Technical field
The present invention relates to a kind of horizontal type multi-stage pump without leakage, be used for high-lift conveying liquid.
Background technique
Existing general sectional type horizontal type multi-stage pump; Structure basically identical, its suction port and exhaust port lay respectively on inlet segment and two parts of water exit end, pump axially on one in front and one in back; Liquid gets into from an end liquid inlet of pump; Discharge from the other end liquid outlet of pump, the major defect that this design exists is that structure is not compact, installs and the maintenance inconvenience; On the other hand, existing sectional type horizontal type multi-stage pump adopts Balance disc to come balancing axial thrust, and Balance disc is positioned at after the impeller, is sealing chamber or Stuffing box after the Balance disc back cavity.Because impeller water outlet pressure is high, when the highly pressurised liquid behind impeller gets into the Balance disc back cavity, though some pressure losses are arranged; Still has very high pressure; Afterwards, when highly pressurised liquid gets into sealing chamber or Stuffing box, be easy to cause leakage at the axle envelope place of pump.
Summary of the invention
The invention discloses a kind of horizontal type multi-stage pump without leakage; Its purpose is to overcome existing sectional type horizontal type multi-stage pump; Structure is not compact, it is inconvenient that maintenance is installed, and causes defective such as leak of liquid easily, and the present invention designs inlet segment and water exit end on a part simultaneously; And the center line of suction port and exhaust port is positioned on the same cross section perpendicular to the pump shaft axis; Make compact structure, installation maintenance conveniently, as suction port and exhaust port are placed on the same horizontal line, then pump can be installed in pipeline as valve; Simultaneously,, be provided with orifice sleeve behind the back cavity a owing to seal ring is set at the impeller back shroud, the labyrinth seal of composite straight-through formula, starting discharging and push back discharge orifice in the orifice sleeve rear end, has therefore greatly reduced the pressure of leakage liquid, guaranteed that liquid does not have leakage.
A kind of horizontal type multi-stage pump without leakage; Comprise water inlet-outlet segment, stage casing, latter end, cylindrical shell, axle, bearing support; Impeller, stator and motor, cylindrical shell is fixed between water inlet-outlet segment and the latter end through turnbuckle, and axle passes the cylindrical shell center and is separately fixed on front-end bearing pedestal and the rear bearing block; Front-end bearing pedestal and rear bearing block are separately fixed on water inlet-outlet segment and the latter end, and the tip of the axis connects with motor through coupling; Impeller is fixed on the axle, the width centering of impeller water outlet and stator water intake, and stator is connected with the stage casing through locating stud; Between water inlet-outlet segment and rear bearing block; Cooling chamber is set, fixing cooling chamber cover plate on the cooling chamber, shaft part between latter end and the front-end bearing pedestal respectively at the sealing chamber or the Stuffing box place of water inlet-outlet segment and latter end; Axle sleeve all is installed, it is characterized in that:
A) fluid intake and liquid outlet all are arranged on water inlet-outlet segment, and two center lines of fluid intake and liquid outlet are positioned on the same cross section perpendicular to the pump shaft axis;
B) water intake of impellers at different levels is towards left, and an impeller and a stator tail prime minister connect and constitute the one-level flow passage components, and flow passage components at different levels are connected in series successively, and each back shroud of impeller is provided with seal ring;
C) form the water inlet ring runner between cylindrical shell and the stage casing, suction port connects pipe and square tube successively behind flange, constitute suction pipe, and suction pipe is communicated with the water inlet ring runner, constitutes the water inlet flow channel of pump; On the latter end of first stage impeller water inlet, intake tunnel is set, intake tunnel is communicated with the water inlet ring runner;
D) on the back shroud of impellers at different levels, be drilled with equalizing orifice; The final stage stator is screwed on water inlet-outlet segment, between final stage stator and the water inlet-outlet segment positioning spigot is set, and its mating face seal, the junction plane between final stage stator and the water inlet-outlet segment have the sealing of O type circle;
E) behind the impeller back cavity a orifice sleeve is set, gapped sealing and the labyrinth seal of composite straight-through formula are provided with the b chamber after the labyrinth seal of composite straight-through formula between orifice sleeve and the axle sleeve;
F) start discharging on the position, b chamber of orifice sleeve rear end and push back discharge orifice, the release return port directly is communicated with suction port;
G) unloading hole is set in sealing chamber or Stuffing box respectively, the Stuffing box top connects pressure-reducing ring, and pressure-reducing ring is provided with compensating groove, and compensating groove is communicated with the release return port through unloading hole.
Described square tube radially be the cone angle divergent contour.
The present invention can realize not having leakage into and out of water end (W.E.), particularly in the high pressure waterexit end of pump, realizes not having and leaks, and makes and reduces loss in the pump operation, improves pump efficiency.Adopt cartridge type centre bearing, improved support stiffness and supporting stability.Suction port and exhaust port are arranged on the same part, and pump work is operated steadily, and are convenient to system pipeline and arrange, install and maintenance.As exhaust port is placed level to, on same horizontal line, so, pump can be installed in pipeline as valve with suction port.
Description of drawings
Fig. 1 is a kind of horizontal type multi-stage pump without leakage structural representation of the present invention;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the true sectional view of the B-B of Fig. 2.
1, axle, 2, the cooling chamber cover plate, 3, first stage impeller, 4, the final stage stator, 5, impeller, 6, the O RunddichtringO; 7, front-end bearing pedestal, 8, axle sleeve, 9, cooling chamber, 10, orifice sleeve, 11, water inlet-outlet segment, 12, the water inlet ring runner; 13, relief opening, 14, turnbuckle, 15, cylindrical shell, 16, the stage casing, 17, the chopped-off head stator, 18, latter end; 19, seal ring, 20, pressure-reducing ring, 21, unloading hole, 22, the release return port, 23, suction port, 24, exhaust port; 25, first stage impeller water intake, 26, the impeller water outlet, 27, rear bearing block, 28, pipe, 29, square tube; 30, equalizing orifice, 31, sealing chamber, 32, Stuffing box, 33, intake tunnel, 34, the labyrinth seal of composite straight-through formula.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done and to further describe.
A kind of horizontal type multi-stage pump without leakage; As shown in Figure 1, comprise water inlet-outlet segment 11, stage casing 16, latter end 18, cylindrical shell 15, axle 1, bearing support, impeller, stator and motor; Cylindrical shell 15 is fixed between water inlet-outlet segment and the latter end through turnbuckle 14; Axle passes the cylindrical shell center and is separately fixed on front-end bearing pedestal 7 and the rear bearing block 27, and front-end bearing pedestal 7 is separately fixed on water inlet-outlet segment 11 and the latter end 18 with rear bearing block 27, and the end of axle 1 connects with motor through coupling; Impeller is fixed on the axle 1; The width direction centering of impeller water outlet 26 and stator water intake; Stator is connected with the stage casing through locating stud, between water inlet-outlet segment 11 and the rear bearing block 27, between latter end 18 and the front-end bearing pedestal 7 cooling chamber 9 is set respectively, and fixing cooling chamber cover plate 2 on the cooling chamber; Shaft part at the sealing chamber 31 or Stuffing box 32 places of water inlet-outlet segment and latter end all is equipped with axle sleeve 8; Fluid intake 23 all is arranged on water inlet-outlet segment 11 with liquid outlet 24, and two center lines of fluid intake and liquid outlet are positioned on the same cross section perpendicular to the pump shaft axis; Suction port 23 connects pipe 28 and square tube 29 successively behind flange, constitute suction pipe, and is as shown in Figure 2, square tube radially be the cone angle divergent contour; The water intake of impellers at different levels is towards left, and an impeller and a stator tail prime minister connect and constitute the one-level flow passage components, and flow passage components at different levels are connected in series successively, and the back shroud of impeller 5 is provided with seal ring 19, and each impeller all is provided with seal ring; Form water inlet ring runner 12 between cylindrical shell 15 and the stage casing 16, suction pipe is communicated with water inlet ring runner 12, constitutes the water inlet flow channel of pump; On the latter end 18 at first stage impeller water intake 25 places, intake tunnel 33 is set, intake tunnel 33 is communicated with water inlet ring runner 12; On the back shroud of impellers at different levels, be drilled with equalizing orifice 30; Final stage stator 4 is screwed on water inlet-outlet segment 11, between final stage stator and the water inlet-outlet segment positioning spigot is set, and its mating face seal, the junction plane between final stage stator and the water inlet-outlet segment have 6 sealings of O type circle; Behind the impeller back cavity a orifice sleeve 10 is set, gapped sealing and composite straight-through formula labyrinth seal 34 are provided with the b chamber after the labyrinth seal of composite straight-through formula between orifice sleeve 10 and the axle sleeve 8; Start discharging on the position, b chamber of orifice sleeve 10 rear ends and push back discharge orifice 22, as shown in Figure 3, the release return port directly is communicated with suction port 23; In sealing chamber 31 or Stuffing box 32, unloading hole 21 is set respectively, the Stuffing box top connects pressure-reducing ring 20, and pressure-reducing ring is provided with compensating groove, and compensating groove is communicated with release return port 22 through unloading hole 21.
The present invention adopts equalizing orifice to come balancing axial thrust, on the back shroud of impellers at different levels, has equalizing orifice 30.The sealing ring gap of impeller 5 back shrouds produces drag losses, and the pressure of the liquid of impeller back cavity a is descended.The mating face seal that positioning spigot is arranged between final stage stator and the water inlet-outlet segment, junction plane have 6 sealings of O type circle, and this just makes the highly pressurised liquid of final stage stator back cavity and a chamber isolate fully, and is as shown in Figure 1.Gap and the composite straight-through formula labyrinth seal 34 of the liquid in a chamber between orifice sleeve 10 and axle sleeve 8, as shown in Figure 5, get into the b chamber and communicate with the water inlet flow channel (low pressure area) of pump through release return port 22.The liquid of the leakage flow gap between water inlet-outlet segment 11 and the axle sleeve 8 of flowing through again when getting into sealing chamber, then communicates with the water inlet flow channel (low pressure area) of pump through unloading hole 21, release return port 22; When getting into Stuffing box, then communicate with the water inlet flow channel (low pressure area) of pump through pressure-reducing ring 20, unloading hole 21, release return port 22.Pressure-reducing ring 20 is seated in the Stuffing box top with matching gap, and is as shown in Figure 3.Like this, post-decompression a tucks in the chamber body again through the off-load in drag losses and the leakage flow several times, and the two ends pressure reduction of the leakage way of liquid between a chamber and sealing chamber or Stuffing box is disappeared basically, thereby, make pump right-hand member (waterexit end) axle envelope realize not having and leak.
The water intake of first stage impeller 3 and impellers at different levels (comprising impeller 5) is towards left.Liquid gets into first stage impeller water intake 25 by the water inlet ring runner 12 (low pressure area) of pump, the intake tunnel 33 of latter end 18.This anti-dress form of impeller makes pump left end (feed-water end) axle envelope avoid the high pressure effect fully, realizes that the feed-water end axle seals nothing and leaks.
Before the pump running, open the suction valve of relief opening 13 and suction line, close the valve and the gauge cock of export pipeline, in pump, fill liquid; Drain air in the pump, afterwards, close relief opening 13; Then, actuating motor drives rotor portion through coupling and rotates.After treating that pump runs well, open gauge cock, slowly open the valve of export pipeline, till gauge hand points to required pressure.
During pump work, liquid gets into suction port 23, and water inlet ring runner 12, latter end 18 entering intake tunnels 33 along pump get into first stage impeller 3 then, get into chopped-off head stators 17 by first stage impeller water outlet 26, get into the next stage flow passage components by chopped-off head stator water outlet.An impeller and a stator are formed the one-level flow passage components.Liquid each flow passage components of flowing through step by step, liquid energy constantly increases.At last, liquid is discharged by exhaust port 24 through the final stage stator 4 of final stage flow passage components.As shown in Figure 1.
Claims (2)
1. horizontal type multi-stage pump without leakage; Comprise water inlet-outlet segment, stage casing, latter end, cylindrical shell, axle, bearing support; Impeller, stator and motor, cylindrical shell is fixed between water inlet-outlet segment and the latter end through turnbuckle, and axle passes the cylindrical shell center and is separately fixed on front-end bearing pedestal and the rear bearing block; Front-end bearing pedestal and rear bearing block are separately fixed on water inlet-outlet segment and the latter end, and the tip of the axis connects with motor through coupling; Impeller is fixed on the axle, the width centering of impeller water outlet and stator water intake, and stator is connected with the stage casing through locating stud; Between water inlet-outlet segment and rear bearing block; Cooling chamber is set, fixing cooling chamber cover plate on the cooling chamber, shaft part between latter end and the front-end bearing pedestal respectively at the sealing chamber or the Stuffing box place of water inlet-outlet segment and latter end; Axle sleeve all is installed, it is characterized in that:
A) fluid intake and liquid outlet all are arranged on water inlet-outlet segment, and two center lines of fluid intake and liquid outlet are positioned on the same cross section perpendicular to the pump shaft axis;
B) water intake of impellers at different levels is towards left, and an impeller and a stator tail prime minister connect and constitute the one-level flow passage components, and flow passage components at different levels are connected in series successively, and each back shroud of impeller is provided with seal ring;
C) form the water inlet ring runner between cylindrical shell and the stage casing, suction port connects pipe and square tube successively behind flange, constitute suction pipe, and suction pipe is communicated with the water inlet ring runner, constitutes the water inlet flow channel of pump; On the latter end of first stage impeller water inlet, intake tunnel is set, intake tunnel is communicated with the water inlet ring runner;
D) on the back shroud of each impeller, be drilled with equalizing orifice; The final stage stator is screwed on water inlet-outlet segment, and positioning spigot and mating face seal are set between final stage stator and the water inlet-outlet segment, and junction plane has the sealing of O type circle;
E) behind the impeller back cavity a orifice sleeve is set, gapped sealing and the labyrinth seal of composite straight-through formula are provided with the b chamber after the labyrinth seal of composite straight-through formula between orifice sleeve and the axle sleeve;
F) start discharging on the position, b chamber of orifice sleeve rear end and push back discharge orifice, the release return port directly is communicated with suction port;
G) unloading hole is set in sealing chamber or Stuffing box respectively, the Stuffing box top connects pressure-reducing ring, and pressure-reducing ring is provided with compensating groove, and compensating groove is communicated with the release return port through unloading hole.
2. a kind of horizontal type multi-stage pump without leakage according to claim 1 is characterized in that: described square tube radially be the cone angle divergent contour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102391976A CN101892991B (en) | 2010-07-28 | 2010-07-28 | Horizontal type multi-stage pump without leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102391976A CN101892991B (en) | 2010-07-28 | 2010-07-28 | Horizontal type multi-stage pump without leakage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101892991A CN101892991A (en) | 2010-11-24 |
| CN101892991B true CN101892991B (en) | 2012-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102391976A Expired - Fee Related CN101892991B (en) | 2010-07-28 | 2010-07-28 | Horizontal type multi-stage pump without leakage |
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| CN (1) | CN101892991B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777421A (en) * | 2012-07-10 | 2012-11-14 | 芜湖水泵制造有限公司 | Water inlet base of large water pump |
| CN102817871A (en) * | 2012-07-10 | 2012-12-12 | 芜湖水泵制造有限公司 | Horizontal multi-stage water feeding pump |
| CN103953548A (en) * | 2014-04-04 | 2014-07-30 | 上海第一水泵厂有限公司 | Sectional horizontal multistage centrifugal pump with first-stage compound impeller |
| EP3156663B1 (en) * | 2015-10-15 | 2019-07-24 | Grundfos Holding A/S | Centrifugal pump assembly |
| CN105864053B (en) * | 2016-04-29 | 2017-12-15 | 武汉船用机械有限责任公司 | A kind of vertical multi-stage immersed pump |
| CN107191387A (en) * | 2017-07-06 | 2017-09-22 | 沈阳透平机械股份有限公司 | A kind of centrifugal compressor of big support span |
| CN107514366B (en) * | 2017-10-25 | 2024-04-19 | 江苏国泉泵业制造有限公司 | Sealing system for low-lift high-temperature pump |
| RU2732655C1 (en) * | 2019-07-23 | 2020-09-21 | Общество С Ограниченной Ответственностью "Нефтекамский Машиностроительный Завод" | Centrifugal sectional pump with two parallel flows of pumped medium |
| CN110529383A (en) * | 2019-10-10 | 2019-12-03 | 兰州理工大学 | A kind of multistage pump Flow vibration inhibition device |
| CN111207080B (en) * | 2020-01-22 | 2020-12-15 | 乐清市芮易经济信息咨询有限公司 | Chemical pump with shaft-split middle-opening conveniently-disassembled structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE865862A (en) * | 1978-04-11 | 1978-10-11 | Acec | IMPROVEMENTS TO TANK CENTRIFUGAL PUMPS |
| US5344285A (en) * | 1993-10-04 | 1994-09-06 | Ingersoll-Dresser Pump Company | Centrifugal pump with monolithic diffuser and return vane channel ring member |
| CN200946570Y (en) * | 2006-09-05 | 2007-09-12 | 山东颜山泵业有限公司 | Balance type multiple-grade wearable centrifugal pump for mining |
| CN101749250B (en) * | 2008-11-30 | 2012-06-20 | 大连深蓝泵业有限公司 | First-stage double-absorption section self-balanced multiple-stage centrifugal pump |
| CN201747617U (en) * | 2010-07-28 | 2011-02-16 | 上海悦澜泵业制造有限公司 | Horizontal multi-stage pump |
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2010
- 2010-07-28 CN CN2010102391976A patent/CN101892991B/en not_active Expired - Fee Related
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| CN101892991A (en) | 2010-11-24 |
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Granted publication date: 20120222 Termination date: 20130728 |