CN107524603A - A kind of vertical two-stage centrifugal pump - Google Patents
A kind of vertical two-stage centrifugal pump Download PDFInfo
- Publication number
- CN107524603A CN107524603A CN201710981680.3A CN201710981680A CN107524603A CN 107524603 A CN107524603 A CN 107524603A CN 201710981680 A CN201710981680 A CN 201710981680A CN 107524603 A CN107524603 A CN 107524603A
- Authority
- CN
- China
- Prior art keywords
- pump housing
- ring
- reciprocating hermetic
- impeller
- hermetic ring
- 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
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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
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/08—Multi-stage pumps the stages being situated concentrically
-
- 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
- F04D29/007—Details, component parts, or accessories 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
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of vertical two-stage centrifugal pump, and it includes the chopped-off head pump housing, pump shaft, single entry sealing ring, impeller, stator, reciprocating hermetic ring and the secondary pump housing.The reciprocating hermetic anchor ring is provided with one of axial notch towards the end face with sleeve impeller, reciprocating hermetic ring is arranged on secondary pump housing suction inlet, the axial notch of reciprocating hermetic ring and the suction eye ring being placed in the secondary pump housing coordinate, and form labyrinth seal structure and built-in flow restriction.The present invention disposes reciprocating hermetic ring in the water inlet of the secondary pump housing, except improvement pump seal performance, improve outside inlet capacity, above all user changes reciprocating hermetic ring diameter of bore, it is equivalent to change supporting suction eye footpath, metering function is played within the specific limits, and user Yi Shixian pumps match with process operation requirement.The present invention is simple in construction, makes easy, stable performance, is adapted to the vertical or Horizontal two-stage centrifugal pump of all size supporting.
Description
Technical field
The present invention relates to a kind of water pump, in particular it relates to a kind of vertical two-stage centrifugal pump, particularly in pump leaf
Take turns a kind of vertical two-stage centrifugal pump of suction inlet.
Background technology
Vertical two-stage centrifugal pump belongs to a kind of general-purpose pump of sizing, its technology maturation, rational in infrastructure, complete in specifications, performance
It is stable, it disclosure satisfy that the supporting requirement of most of users.But some users are because technique is special, commercially available vertical two-stage centrifugal pump
Hydraulic performance and process requirements index slightly gap, be mounted directly using necessarily reducing technological effect.Therefore, certain customers need
Ask one kind on the basis of matching pump general structure is constant, slightly local structural modification with regard to can accomplish it is micro increase and decrease metered flow or
The efficient position of offset behavior curve.Pump processed skilled person will realize that, spiral case and impeller belong to the main component of pump hydraulic model, general feelings
Under condition, its structure can not be changed easily.Otherwise, the intrinsic flow of whole pump, lift, shaft power, efficiency and cavitation can be changed
The performance indications such as surplus.Therefore, seek one kind and neither change former pump basic structure, the scheme of the micro change pump performance of and can is
Research purpose of the present invention.
The content of the invention
Present invention is generally directed to the prior art products hydraulic performance that user chooses and process matched therewith demand slightly gap, and
And the problem of being difficult to directly adjust, propose a kind of vertical two-stage centrifugal pump, the pump does not change original basic structure, only changed with
The sealing ring that impeller coordinates, so that it may realize micro increase and decrease metered flow or the purpose of the efficient position of offset behavior curve.
The present invention is achieved through the following technical solutions technical goal.
A kind of vertical two-stage centrifugal pump, it includes the chopped-off head pump housing, pump shaft, single entry sealing ring, impeller, stator, reciprocating hermetic
Ring and the secondary pump housing.The chopped-off head pump housing is placed on the secondary pump housing and is tightly connected, between the chopped-off head pump housing and the secondary pump housing
It is boundary in built-in each impeller in tandem of pump shaft upper-lower section using stator.The single entry sealing ring sucks installed in the chopped-off head pump housing
Mouthful, single entry sealing ring endoporus is matched somebody with somebody with the impeller being placed in the chopped-off head pump housing is combined into telescopic sealing structure.Its improvements exists
In：The reciprocating hermetic anchor ring is provided with one of axial notch towards the end face with sleeve impeller, and reciprocating hermetic ring is arranged on secondary pumps
Body suction inlet, the axial notch of reciprocating hermetic ring and the suction eye ring being placed in the secondary pump housing coordinate, and form labyrinth type
Sealing structure and built-in flow restriction.
As further improvement project, the reciprocating hermetic anchor ring is arc-shaped edges towards the endoporus side that medium flows into end, is in
The endoporus side of medium outflow end is bevel edge, the axial notch on reciprocating hermetic ring end face and supporting suction eye ring inside and outside circle
Gap coordinates.
As further improvement project, the reciprocating hermetic anchor ring towards medium flow into end endoporus side be radius R at least 5mm
Arc-shaped edges, medium outflow end endoporus side be α=45 °~60 ° bevel edge.
As further improvement project, the reciprocating hermetic ring internal diameter is smaller 6~40mm than supporting suction eye ring internal diameter.
The present invention compared with prior art, has the positive effect that：
1st, reciprocating hermetic ring coordinates with the suction choma with sleeve impeller, and simple in construction, making easily, sets up reciprocating hermetic ring almost
Do not increase cost of manufacture；
2nd, reciprocating hermetic ring coordinates with supporting suction eye ring, in addition to sealing property is improved, it is most important that user changes multiple
Formula sealing ring diameter of bore size, it is equivalent to change supporting suction eye footpath, plays metering function within the specific limits,
User Yi Shixian pumps match with process operation requirement；
3rd, built-in flow restriction can prevent water pump from being offset to large-capacity point, avoid that overpower operation occurs, greatly reduce motor damage
Bad probability.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the axial cross-sectional views of reciprocating hermetic ring in Fig. 1.
Fig. 3 is partial structurtes enlarged diagram at A in Fig. 1.
Embodiment
Below according to accompanying drawing and in conjunction with the embodiments, the invention will be further described.
A kind of vertical two-stage centrifugal pump shown in Fig. 1, it includes the chopped-off head pump housing 1, pump shaft 2, single entry sealing ring 3, impeller 4, led
Leaf 5, reciprocating hermetic ring 6 and the secondary pump housing 7.The chopped-off head pump housing 1 is placed on the secondary pump housing 7 and is tightly connected, chopped-off head pump
Between body 1 and the secondary pump housing 7 with stator 5 be boundary in built-in each impeller 4 in tandem of the upper-lower section of pump shaft 2.Because considering to mercury vapour
Corrosion energy, the present invention does not change the basic structure of chopped-off head pump, still coordinated with the single entry sealing ring 3 and impeller 4 of traditional structure, this
Telescopic sealing structure is very simple, practical, can play sealing function.Emphasis of the present invention improves secondary pumps and absorbed water with sleeve impeller 4
Sealing structure at choma, specially designs reciprocating hermetic ring 6 as shown in Figure 2, and reciprocating hermetic ring 6 faces the end face with sleeve impeller 4
One of axial notch is provided with, reciprocating hermetic ring 6 is arranged on the secondary suction inlet of the pump housing 7, reciprocating hermetic ring 6 as shown in Figure 3 and peace
Put the impeller 4 in the secondary pump housing 7 and suck the cooperation of choma suction inlet ring, the axle of the suction choma insertion reciprocating hermetic ring 6 of impeller 4
Labyrinth seal structure is formed into groove.Such a labyrinth seal structure is more advanced than telescopic sealing structure, good sealing effect,
Be advantageous to improve the inlet capacity of pump.On the other hand because the suction inlet internal diameter of the supporting impeller 4 of boring ratio in reciprocating hermetic ring 6 is small,
The inwall of reciprocating hermetic ring 6, which is in the suction inlet inner chamber of impeller 4, directly reduces area of passage, the built-in flow restriction being made up of the portion
Metered flow or the efficient position of offset behavior curve of pump can be effectively finely tuned, specific regulated quantity is by changing reciprocating hermetic ring 6
Hole size and realize.The present embodiment pump type clH150-125-6/2, the metered flow at the efficient position of its performance curve
95m3/h, lift 82m, because the flow of technological requirement matching is 70m3/h, lift 83m, it is computed reducing 25m3/h specified stream
Amount, as long as user accomplishes that the internal diameter of reciprocating hermetic ring 6 sucks the small 10mm cans of choma internal diameter than impeller 4 and realizes current limliting purpose.
In order to reduce the flow losses of high speed liquid flow, the medium of reciprocating hermetic ring 6 is flowed into the design of end endoporus side by the present invention
Into arc-shaped edges, medium outflow end endoporus side is designed to bevel edge.Arc-shaped edges radius R value 15mm, bevel edge α in the present embodiment=
60°。
The present invention disposes reciprocating hermetic ring 6 in the water inlet of the secondary pump housing 7, except pump seal performance is improved, improves suction
Outside ability, it is most important that user changes the diameter of bore of reciprocating hermetic ring 6, is equivalent to change with the suction bore of sleeve impeller 4,
Metering function is played within the specific limits, and user Yi Shixian pumps match with process operation requirement.Above-mentioned improvement, which is established, not to be changed
Become on the basis of pump basic structure, user only realizes technical goal by changing the diameter of bore size of reciprocating hermetic ring 6, the improvement
It is simple in construction, make easily, stable performance, be adapted to all size vertical or Horizontal two-stage centrifugal pump it is supporting.
Claims (4)
1. a kind of vertical two-stage centrifugal pump, it includes the chopped-off head pump housing（1）, pump shaft（3）, single entry sealing ring（3）, impeller（4）, stator
（5）, reciprocating hermetic ring（6）With the secondary pump housing（7）；The chopped-off head pump housing（1）It is placed in the secondary pump housing（7）On and make sealing connect
Connect, the chopped-off head pump housing（1）With the secondary pump housing（7）Between with stator（5）It is boundary in built-in pump shaft（2）Each leaf in tandem of upper-lower section
Wheel（4）；The single entry sealing ring（3）Installed in the chopped-off head pump housing（1）Suction inlet, single entry sealing ring（3）Endoporus is with being placed in chopped-off head
The pump housing（1）In impeller（4）With being combined into telescopic sealing structure；It is characterized in that：The reciprocating hermetic ring（6）Face supporting
Impeller（4）End face be provided with one of axial notch, reciprocating hermetic ring（6）Installed in the secondary pump housing（7）Suction inlet, reciprocating hermetic
Ring（6）Axial notch and be placed in the secondary pump housing（7）In impeller（4）Suck choma to coordinate, form labyrinth seal structure
With built-in flow restriction.
A kind of 2. vertical two-stage centrifugal pump according to claim 1, it is characterised in that：The reciprocating hermetic ring（6）Face
The endoporus side that medium flows into end is arc-shaped edges, and the endoporus side in medium outflow end is bevel edge, reciprocating hermetic ring（6）On end face
Axial notch and match somebody with somebody sleeve impeller（4）Choma inside and outside circle gap is sucked to coordinate.
A kind of 3. vertical two-stage centrifugal pump according to claim 1, it is characterised in that：The reciprocating hermetic ring（6）Face
The endoporus side that medium flows into end is radius R at least 5mm arc-shaped edges, and medium outflow end endoporus side is the chamfering of α=45 °~60 °
Side.
A kind of 4. vertical two-stage centrifugal pump according to claim 1, it is characterised in that：The reciprocating hermetic ring（6）Internal diameter
Than with sleeve impeller（4）Suck the small 6~40mm of choma internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710981680.3A CN107524603A (en) | 2017-10-20 | 2017-10-20 | A kind of vertical two-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710981680.3A CN107524603A (en) | 2017-10-20 | 2017-10-20 | A kind of vertical two-stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107524603A true CN107524603A (en) | 2017-12-29 |
Family
ID=60685498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710981680.3A Pending CN107524603A (en) | 2017-10-20 | 2017-10-20 | A kind of vertical two-stage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107524603A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230600A (en) * | 2019-07-17 | 2019-09-13 | 上海创科泵业制造有限公司 | Multi-stage shield pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003184778A (en) * | 2001-12-14 | 2003-07-03 | Kawamoto Pump Mfg Co Ltd | Vertical type multi-stage centrifugal pump |
| CN2632347Y (en) * | 2003-07-22 | 2004-08-11 | 哈尔滨水泵厂 | Vertical multi-stage centrifugal pumps |
| CN2654906Y (en) * | 2003-06-30 | 2004-11-10 | 上海申宝泵业有限公司 | Vertical multi-stage centrifugal pump |
| CN2752491Y (en) * | 2004-11-19 | 2006-01-18 | 广州市白云泵业制造有限公司 | Vertical multi-stage centrifugal pump |
| CN204082677U (en) * | 2014-09-04 | 2015-01-07 | 广州水泵厂有限公司 | A kind of single segment structure of multistage sectional centrifugal pump |
| CN205297939U (en) * | 2015-12-31 | 2016-06-08 | 江苏振华泵业制造有限公司 | Vertical doublestage centrifugal pump of built -in current -limiting structure |
-
2017
- 2017-10-20 CN CN201710981680.3A patent/CN107524603A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003184778A (en) * | 2001-12-14 | 2003-07-03 | Kawamoto Pump Mfg Co Ltd | Vertical type multi-stage centrifugal pump |
| CN2654906Y (en) * | 2003-06-30 | 2004-11-10 | 上海申宝泵业有限公司 | Vertical multi-stage centrifugal pump |
| CN2632347Y (en) * | 2003-07-22 | 2004-08-11 | 哈尔滨水泵厂 | Vertical multi-stage centrifugal pumps |
| CN2752491Y (en) * | 2004-11-19 | 2006-01-18 | 广州市白云泵业制造有限公司 | Vertical multi-stage centrifugal pump |
| CN204082677U (en) * | 2014-09-04 | 2015-01-07 | 广州水泵厂有限公司 | A kind of single segment structure of multistage sectional centrifugal pump |
| CN205297939U (en) * | 2015-12-31 | 2016-06-08 | 江苏振华泵业制造有限公司 | Vertical doublestage centrifugal pump of built -in current -limiting structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230600A (en) * | 2019-07-17 | 2019-09-13 | 上海创科泵业制造有限公司 | Multi-stage shield pump |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171229 |
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| WD01 | Invention patent application deemed withdrawn after publication |