CN109185217A - A kind of suction inlet is the water inlet segment structure of the centrifugal multistage pump multiple centrifugal pump of fish mouth type - Google Patents
A kind of suction inlet is the water inlet segment structure of the centrifugal multistage pump multiple centrifugal pump of fish mouth type Download PDFInfo
- Publication number
- CN109185217A CN109185217A CN201811433378.5A CN201811433378A CN109185217A CN 109185217 A CN109185217 A CN 109185217A CN 201811433378 A CN201811433378 A CN 201811433378A CN 109185217 A CN109185217 A CN 109185217A
- Authority
- CN
- China
- Prior art keywords
- pump
- pump housing
- inlet segment
- suction inlet
- centrifugal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 241000251468 Actinopterygii Species 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 24
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—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
- F04D29/4273—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps suction eyes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of water inlet segment structures for the centrifugal multistage pump multiple centrifugal pump that suction inlet is fish mouth type, it is characterised in that: including the inlet segment pump housing and the chopped-off head middle section pump housing；The inlet segment pump housing and the chopped-off head middle section pump housing cover on pump shaft；The first end of the inlet segment pump housing offers suction inlet；Bearing box is provided in suction inlet；The first end of bearing box is the shape of solid circular cone, and the shape of the circular cone is tapered along the end of center line to first end, and the similar end shape of first end is fish mouth；The second end of bearing box is that the second end of hollow cylindrical body and bearing box is opening；The second end of bearing box is equipped with sliding bearing, and sliding bearing is that the both ends of hollow cylinder and sliding bearing are opening, and the first end of pump shaft protrudes into sliding bearing.Present invention reduces liquid in the energy loss of suction inlet, improves the hydraulic performance of centrifugal multistage pump multiple centrifugal pump.
Description
Technical field
The present invention relates to centrifugal pump field, in particular to a kind of suction inlet is the inlet segment knot of the centrifugal multistage pump multiple centrifugal pump of fish mouth type
Structure.
Background technique
The effect of the water inlet segment structure of centrifugal multistage pump multiple centrifugal pump is to suck the liquid in pipeline from the suction inlet of the inlet segment pump housing,
First stage impeller is subsequently flowed into, impellers at different levels are passed sequentially through.Therefore, the liquid flowing state in suction inlet will have a direct impact in impeller
The flow regime of liquid, to influence the working efficiency and cavitation-resistance of centrifugal multistage pump multiple centrifugal pump.The centrifugal multistage pump multiple centrifugal pump of the prior art
Water inlet segment structure, including the inlet segment pump housing.Inlet segment pump housing first end opens up suction inlet, is equipped with bearing box in suction inlet；Axis
Holding box is hollow cylinder.The space of interference when liquid enters suction inlet by bearing box, liquid flowing becomes smaller suddenly, and
Forward direction, which strikes the liquid on bearing box, to be stopped by bearing box, and suction inlet is reverse flowed to, and cause liquid in suction inlet flowing
Very big energy loss is produced, the hydraulic performance of centrifugal multistage pump multiple centrifugal pump is reduced.
Summary of the invention
In view of the deficiencies of the prior art, the invention discloses a kind of inlet segments for the centrifugal multistage pump multiple centrifugal pump that suction inlet is fish mouth type
Structure.
The technical solution adopted in the present invention is as follows:
A kind of suction inlet is the water inlet segment structure of the centrifugal multistage pump multiple centrifugal pump of fish mouth type, including the inlet segment pump housing and chopped-off head middle section pump
Body；The inlet segment pump housing and the chopped-off head middle section pump housing cover on pump shaft；The first end of the inlet segment pump housing offers suction inlet；In suction inlet
It is provided with bearing box；The first end of bearing box is the shape of solid circular cone, and the shape of the circular cone is along the end of center line to the
One end is tapered, and the top of first end is plane；The second end of bearing box is equipped with sliding bearing, and sliding bearing is open circles
The both ends of cylinder and sliding bearing are opening；The first end of pump shaft protrudes into sliding bearing.
Its further technical characteristic are as follows: the first end of the inlet segment pump housing is further fixed on circular flange；Inlet segment
The pump housing passes through flange and piping connection.
Its further technical characteristic are as follows: the second end of the inlet segment pump housing is equipped with the chopped-off head middle section pump housing；The inlet segment pump housing
Second end and the chopped-off head middle section pump housing between offer O-ring seal groove；O-ring is installed in O-ring seal groove；Inlet segment pump
Second end, the chopped-off head middle section pump housing and the O-ring of body form pump chamber.
Its further technical characteristic are as follows: the head for being equipped with first stage impeller in the pump chamber and being mounted on the outside of first stage impeller
Grade guide vane；First stage impeller and first-level guide blade all cover on pump shaft；First stage impeller is fixed on by first stage impeller by the key on pump shaft
On pump shaft.
Its further technical characteristic are as follows: inlet segment casing ring is installed between the inlet segment pump housing and first stage impeller, it is first
Wicket gate seal ring is installed between grade impeller and first-level guide blade.
Beneficial effects of the present invention are as follows:
It is the shape of solid circular cone, the shape of circular cone that the technical characteristic of the present invention difference prior art, which is the first end of bearing box,
Shape is tapered along the end of center line to first end, and the top of first end is similar to fish mouth.The second end of bearing box is hollow
Cylindrical body.When liquid from the suction inlet of the inlet segment pump housing suck when, liquid in the flowing space in suction inlet gradually, smoothly
Reduce, and it is positive hit bearing box and be blocked the liquid of rebound greatly reduce, most liquid along bearing box first
The arc direction at end flows, and solves interference when liquid in the prior art enters suction inlet by bearing box, liquid flowing
Space becomes smaller suddenly, the space of liquid flowing becomes smaller suddenly, and liquid forward direction hits the technical issues of bearing box is blocked rebound, subtracts
Small bearing box interferes liquid bring, thus greatly reduces liquid in the energy loss of suction inlet, improve it is multistage from
The hydraulic performance of heart pump.
In addition, the effect of setting sealing ring be reduce between the inlet segment pump housing and first stage impeller, first-level guide blade and chopped-off head leaf
Abrasion between wheel.The effect of installation sliding bearing is to reduce the resistance generated in centrifugal multistage pump multiple centrifugal pump operation process, protects pump shaft
It holds and rotates smoothly.
Detailed description of the invention
Fig. 1 is sectional view of the invention.
Specific embodiment
With reference to the accompanying drawing, illustrate the specific embodiment of the present embodiment.
Fig. 1 is sectional view of the invention.Since the flow losses of centrifugal multistage pump multiple centrifugal pump itself are well-known, one is formd
A problem and it is difficult to predict flow losses source, so need change water inlet segment structure design.As shown in Figure 1, this hair
It is bright to disclose a kind of water inlet segment structure for the centrifugal multistage pump multiple centrifugal pump that suction inlet is fish mouth type, including the inlet segment pump housing 1 and chopped-off head middle section
The pump housing 3.3 sets of the inlet segment pump housing 1 and the chopped-off head middle section pump housing are on pump shaft 10.The second end of the inlet segment pump housing 1 is equipped in chopped-off head
The section pump housing 3.O-ring seal groove 4 is offered between the second end and the chopped-off head middle section pump housing 3 of the inlet segment pump housing 1.O-ring seal groove 4
O-ring is inside installed.Second end, the chopped-off head middle section pump housing 3 and the O-ring of the inlet segment pump housing 1 form pump chamber.Head is installed in pump chamber
Grade impeller 5 and the first-level guide blade 6 for being mounted on 5 outside of first stage impeller.First stage impeller 5 and first-level guide blade 6 all cover on pump shaft 10.It is first
First stage impeller 5 is fixed on pump shaft 10 by grade impeller 5 by the key 11 on pump shaft 10.Between the inlet segment pump housing 1 and first stage impeller 5
Inlet segment casing ring 7 is installed, wicket gate seal ring 8 is installed between first stage impeller 5 and first-level guide blade 6.
The first end of the inlet segment pump housing 1 offers suction inlet 9.Bearing box 12 is provided in suction inlet 9.The of bearing box 12
One end is the shape of solid circular cone, and the shape of circular cone is tapered along the end of center line to first end, and the top of first end is
Similar plane, shape are fish mouth.The second end of bearing box 12 is that the second end of hollow cylindrical body and bearing box 12 is opening.This
Embodiment middle (center) bearing box 12 and the inlet segment pump housing 1 are integrally formed.The second end of bearing box 12 is equipped with sliding bearing 13, sliding axle
Hold 13 be hollow cylinder and sliding bearing 13 both ends be opening；The first end of pump shaft 10 protrudes into sliding bearing 13.Into
The first end of the water section pump housing 1 is further fixed on circular flange 2.The inlet segment pump housing 1 passes through flange 2 and piping connection.
When liquid enters from suction inlet 9, strikes bearing box 12, liquid is stopped by bearing box 12, liquid flow decelerating；
Before liquid enters first stage impeller 5 by bearing box 12 from suction inlet 9, the flowing space reduces suddenly, and liquid flowing accelerates.At this
In the case of two kinds, flow losses are all produced, therefore the first end of bearing box 12 is designed as to the shape of solid circular cone, the circular cone
Shape be tapered along the end of center line to first end, the similar end shape of first end is fish mouth, can effectively reduce liquid
The flow losses of body.
Above description is explanation of the invention, is not intended to limit the invention, and limited range of the present invention is referring to right
It is required that the present invention can make any type of modification without prejudice to basic structure of the invention.
Claims (5)
1. the water inlet segment structure that a kind of suction inlet is the centrifugal multistage pump multiple centrifugal pump of fish mouth type, it is characterised in that: including the inlet segment pump housing (1)
With the chopped-off head middle section pump housing (3)；The inlet segment pump housing (1) and the chopped-off head middle section pump housing (3) cover on pump shaft (10)；The inlet segment pump housing (1)
First end offer suction inlet (9)；Bearing box (12) are provided in suction inlet (9)；The first end of bearing box (12) is solid
The shape of the shape of circular cone, the circular cone is tapered along the end of center line to first end, and the top of first end is plane；Axis
It is opening that the second end of box (12), which is held, as the second end of hollow cylindrical body and bearing box (12)；In the second end of bearing box (12)
It is equipped with sliding bearing (13), sliding bearing (13) is that the both ends of hollow cylinder and sliding bearing (13) are opening；Pump shaft
(10) first end protrudes into sliding bearing (13).
2. the water inlet segment structure that suction inlet according to claim 1 is the centrifugal multistage pump multiple centrifugal pump of fish mouth type, it is characterised in that: institute
The first end for stating the inlet segment pump housing (1) is further fixed on circular flange (2)；The inlet segment pump housing (1) is connected by flange (2) and pipeline
It connects.
3. the water inlet segment structure that suction inlet according to claim 1 is the centrifugal multistage pump multiple centrifugal pump of fish mouth type, it is characterised in that: into
The second end of the water section pump housing (1) is equipped with the chopped-off head middle section pump housing (3)；The second end and the chopped-off head middle section pump housing of the inlet segment pump housing (1)
(3) O-ring seal groove (4) are offered between；O-ring is installed in O-ring seal groove (4)；The second of the inlet segment pump housing (1)
End, the chopped-off head middle section pump housing (3) and O-ring form pump chamber.
4. the water inlet segment structure that suction inlet according to claim 3 is the centrifugal multistage pump multiple centrifugal pump of fish mouth type, it is characterised in that: institute
State the first-level guide blade (6) for being equipped with first stage impeller (5) in pump chamber and being mounted on the outside of first stage impeller (5)；First stage impeller (5) and head
Grade guide vane (6) all covers on pump shaft (10)；First stage impeller (5) is fixed by first stage impeller (5) by the key (11) on pump shaft (10)
On pump shaft (10).
5. the water inlet segment structure that suction inlet according to claim 4 is the centrifugal multistage pump multiple centrifugal pump of fish mouth type, it is characterised in that: into
Inlet segment casing ring (7) are installed between the water section pump housing (1) and first stage impeller (5), first stage impeller (5) and first-level guide blade (6)
Between install wicket gate seal ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811433378.5A CN109185217A (en) | 2018-11-28 | 2018-11-28 | A kind of suction inlet is the water inlet segment structure of the centrifugal multistage pump multiple centrifugal pump of fish mouth type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811433378.5A CN109185217A (en) | 2018-11-28 | 2018-11-28 | A kind of suction inlet is the water inlet segment structure of the centrifugal multistage pump multiple centrifugal pump of fish mouth type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109185217A true CN109185217A (en) | 2019-01-11 |
Family
ID=64938339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811433378.5A Pending CN109185217A (en) | 2018-11-28 | 2018-11-28 | A kind of suction inlet is the water inlet segment structure of the centrifugal multistage pump multiple centrifugal pump of fish mouth type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109185217A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864246A (en) * | 2021-10-31 | 2021-12-31 | 浙江水泵总厂有限公司 | Bearing cooling structure and condensate pump with same |
| CN114001033A (en) * | 2021-10-31 | 2022-02-01 | 浙江水泵总厂有限公司 | Axial liquid inlet structure and multistage centrifugal pump with same |
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| CN205401146U (en) * | 2015-12-02 | 2016-07-27 | 池泉 | Festival segmentation multistage centrifugal pump |
| CN206495785U (en) * | 2016-12-29 | 2017-09-15 | 镇江福泰克流体技术有限公司 | A kind of cantilevered double-runner centrifugal pump |
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| CN209083654U (en) * | 2018-11-28 | 2019-07-09 | 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 |
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- 2018-11-28 CN CN201811433378.5A patent/CN109185217A/en active Pending
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| CN101691872A (en) * | 2009-09-18 | 2010-04-07 | 襄樊五二五泵业有限公司 | Impeller modified structure of chemical process pump |
| CN201858160U (en) * | 2010-11-05 | 2011-06-08 | 浙江科尔泵业股份有限公司 | Horizontally axial suction sectioned multistage high-pressure centrifugal pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864246A (en) * | 2021-10-31 | 2021-12-31 | 浙江水泵总厂有限公司 | Bearing cooling structure and condensate pump with same |
| CN114001033A (en) * | 2021-10-31 | 2022-02-01 | 浙江水泵总厂有限公司 | Axial liquid inlet structure and multistage centrifugal pump with same |
| WO2023070766A1 (en) * | 2021-10-31 | 2023-05-04 | 浙江水泵总厂有限公司 | Axial liquid intake structure and multi-stage centrifugal pump having same |
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