CN206785748U - A kind of fast demountable two-stage cantilever centrifugal pump - Google Patents
A kind of fast demountable two-stage cantilever centrifugal pump Download PDFInfo
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- CN206785748U CN206785748U CN201720605553.9U CN201720605553U CN206785748U CN 206785748 U CN206785748 U CN 206785748U CN 201720605553 U CN201720605553 U CN 201720605553U CN 206785748 U CN206785748 U CN 206785748U
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Abstract
A kind of fast demountable two-stage cantilever centrifugal pump belongs to horizontal centrifugal pump technical field, and the utility model provides a kind of maintenance conveniently, improves pump shaft service life, the two-stage cantilever centrifugal pump of fast demountable.The utility model includes the pump housing, it is characterised in that：Pump housing front end, which is integrally formed, is provided with suction flange；Pump housing rear end is provided with pump cover, and a pump shaft with bearing suspension is connected through pump cover with the one stage impeller in the pump housing and sencond stage impeller；Interstage diaphragm is provided between one stage impeller and sencond stage impeller.
Description
Technical field
The utility model belongs to horizontal centrifugal pump technical field, more specifically, the utility model is related to it is a kind of it is horizontal, two
Level, the structure of cantilever centrifugal pump are improved.
Background technology
Type horizontal cantilever formula centrifugal pump is widely used in the engineering fields such as electric power, oil, chemical industry.The structure common design of pump is
Horizontal, single-stage, cantilevered.By specific speed formulaLearn, lift H is higher, and specific speed is smaller.In order to ensure ns
>=30, in low discharge, high-lift operating mode, according to performance parameter, necessary NPSH requirement, pump is designed as both stage impellers sometimes
Structure, ensure impeller will not it is too narrow, impeller diameter is not too large, reduce disc friction, improve efficiency.Applied to oil
The pump majority in work field is designed as axially horizontal suction, vertical discharge.In order to reduce axial thrust, one stage impeller, sencond stage impeller
Back-to-back arrangement is designed as, can be with automatically balancing axial force.
The two-stage (two-speed) pump of traditional structure mainly by front pump cover, the pump housing, pump cover, one stage impeller, sencond stage impeller, impeller nut, axle,
Axle envelope, axle sleeve and bearing suspension part etc. form.Axle envelope, axle sleeve are consumable accessory, in repair and maintenance and dismounting, it is necessary to will be whole
Pump head is dismantled from import and export pipeline, then dismantles front pump cover, unclamps impeller nut, then dismantles one stage impeller, then by two level leaf
Wheel is integrally extracted out with bearing suspension part, then is dismantled and decomposed each part, could overhaul axle envelope, axle sleeve, and maintenance unloading process is partially multiple
It is miscellaneous, waste maintenance manually, maintenance consumption is long in time limit.
Pump head is connected with import and export pipeline using flange, no matter pump internal fault size, once with import and export pipeline
Demounting flange, the gasket seal between flange will all be changed, wasted serious.
The impeller nut of traditional structure is connected with axle using screw threads for fastening, and impeller nut is must disassembling of overhauling every time, and is torn open
The number unloaded is excessively frequent, once the screw thread on axle is collided with, scratched, whole axle will be caused to be reported because screw thread can not repair use
It is useless, serious waste.
The content of the invention
The utility model is aiming above mentioned problem, there is provided one kind maintenance is convenient, improves pump shaft service life, can quickly tear open
The two-stage cantilever centrifugal pump of dress.
In order to realize above-mentioned purpose of the present utility model, the utility model adopts the following technical scheme that, the utility model bag
Include the pump housing, it is characterised in that：Pump housing front end, which is integrally formed, is provided with suction flange；Pump housing rear end is provided with pump cover, and one has axle
The pump shaft for holding suspension is connected through pump cover with the one stage impeller in the pump housing and sencond stage impeller；Set between one stage impeller and sencond stage impeller
It is equipped with interstage diaphragm.
As a kind of preferred scheme of the present utility model, the pump shaft end set has joint, is set between joint and pump shaft
It is equipped with annular groove；Split type snap ring is provided with the annular groove, split type snap ring passes through the first attachment screw and fitting end
Cutting ferrule be connected；The end face of cutting ferrule is in contact with the front end of one stage impeller.
As another preferred scheme of the present utility model, set on the pump shaft between one stage impeller and sencond stage impeller
It is equipped with axle sleeve between level, the external diameter of axle sleeve is more than the hub outside diameter of one stage impeller and sencond stage impeller between level；On the inside of the interstage diaphragm
It is engaged by axle sleeve between internal liner and level.
As the third preferred scheme of the present utility model, the outer rim of the interstage diaphragm is provided with adapter sleeve, the company
The front end face of female connector and the boss of pump body coordinate；O-ring seal is provided between adapter sleeve and boss；The rear end of adapter sleeve
Face is connected by the second attachment screw with the pump cover.
The beneficial effects of the utility model：1. because interstage diaphragm is combined with pump cover using mode connects for screw, in repair and maintenance
When can extract out the parts such as one stage impeller, interstage diaphragm, sencond stage impeller and bearing suspension are overall on rear side of the pump housing, realization is not required to
Dismantle import and export pipeline, it is not necessary to change the gasket seal between pipe flange, reduce maintenance manually, shorten maintenance duration.
The parts such as one stage impeller, interstage diaphragm, sencond stage impeller and bearing suspension can be deposited as integral core parcel it is standby, realize to engineering fill
Put the crucial pumping unit Quick overhaul of medium-term and long-term operating, change.
2. the utility model eliminates single front pump cover part, and former front pump cover and pump body design is combined integrated.Reduce
In the machining man-hour of the pump housing, manufacturing cost is reduced, while reduce the sealed faying face of former front pump cover and the pump housing, reduced
Accident leakage point.
3. pump shaft front end of the present utility model is not provided with screw thread, colliding with, scratching in maintenance is effectively prevented, extending shaft uses
In the life-span, the manufacturing procedure of axle is decreased, reduce the manufacturing cost of axle.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of interstage diaphragm.
Fig. 3 is Fig. 2 A-A sectional views.
Fig. 4 is Fig. 1 partial enlarged drawing.
Fig. 5 is the structural representation of existing two-stage centrifugal pump.
1 it is bearing suspension in accompanying drawing, 2 be pump shaft, 3 be sencond stage impeller, 4 be the second attachment screw, 5 be runner hole, 6 is O
Type sealing ring, 7 be interstage diaphragm, 8 be the pump housing, 9 be one stage impeller, 10 be suction flange, 11 be axle sleeve between level, 12 be to serve as a contrast between level
Set, 13 be split type snap ring, 14 be annular groove, 15 be cutting ferrule, 16 be joint, 17 be the first attachment screw, 18 be pump cover.
Embodiment
The utility model includes the pump housing 8, it is characterised in that：The front end of the pump housing 8, which is integrally formed, is provided with suction flange 10；The pump housing
8 rear ends are provided with pump cover 18, and a pump shaft 2 with bearing suspension 1 passes through pump cover 18 and the one stage impeller 9 and two level in the pump housing 8
Impeller 3 is connected；Interstage diaphragm 7 is provided between one stage impeller 9 and sencond stage impeller 3.
As a kind of preferred scheme of the present utility model, the end set of pump shaft 2 has joint 16, joint 16 and pump shaft 2
Between be provided with annular groove 14；Split type snap ring 13 is provided with the annular groove 14, split type snap ring 13 passes through the first connection
Screw 17 is connected with the cutting ferrule 15 of the end of joint 16；The end face of cutting ferrule 15 is in contact with the front end of one stage impeller 9.
As another preferred scheme of the present utility model, on the pump shaft 2 positioned at one stage impeller 9 and sencond stage impeller 3 it
Between be provided with axle sleeve 11 between level, the external diameter of axle sleeve 11 is more than the hub outside diameter of one stage impeller 9 and sencond stage impeller 3 between level；The level
The inner side of space bar 7 is engaged by internal liner 12 with axle sleeve between level 11.
As the third preferred scheme of the present utility model, the outer rim of the interstage diaphragm 7 is provided with adapter sleeve, the company
Boss inside the front end face and the pump housing 8 of female connector coordinates；O-ring seal 6 is provided between adapter sleeve and boss；After adapter sleeve
End face is connected by the second attachment screw 4 with the pump cover 18.
The interstage diaphragm 7 is arranged to discoidal cell body, and hand of helix is provided with runner hole in the side wall of cell body
5, runner hole 5 is provided with runner on the pump housing 8.
When pump needs to overhaul dismounting, the connecting bolt and nut of the pump housing 8 and the circumferencial direction of pump cover 18 are unclamped first, by one
The parts such as level impeller 9, interstage diaphragm 7, sencond stage impeller 3, pump cover 18, bearing suspension 1 are integrally all extracted out from the pump housing 8.Then, tear open
The first attachment screw 17 between cutting ferrule 15 and split type snap ring 13, dismounting cutting ferrule 15, split type snap ring 13 are unloaded, then dismantles one-level
Impeller 9.The screw between interstage diaphragm 7 and pump cover 18 is dismantled, dismantles interstage diaphragm 7, dismantles axle sleeve 11 between level, dismantles two level leaf
Wheel 3, then dismantle other parts for needing to overhaul, change.
The assembling of pump is opposite with above-mentioned unloading process.
Pump shaft 2 is driven to rotate by prime mover, one stage impeller 9, sencond stage impeller 3 follow rotation, and medium is from the suction flange of the pump housing 8
One stage impeller 9, then the runner by pump cover 18 are sucked at 10, into sencond stage impeller 3.Entered by the outlet of sencond stage impeller 3 between level
The corresponding runner of dividing plate 7, the discharge volute chamber of the pump housing 8 is entered back into, into pump discharge pipeline, complete medium conveying.
It is understood that above with respect to specific descriptions of the present utility model, it is merely to illustrate the utility model and is not
The technical scheme described by the utility model embodiment is limited to, it will be understood by those within the art that, still can be with
The utility model is modified or equivalent substitution, to reach identical technique effect；As long as satisfaction uses needs, all in this reality
Within new protection domain.
Claims (5)
1. a kind of fast demountable two-stage cantilever centrifugal pump, including the pump housing（8）, it is characterised in that：The pump housing（8）Front end one into
Type is provided with suction flange（10）；The pump housing（8）Rear end is provided with pump cover（18）, one has bearing suspension（1）Pump shaft（2）Pass through
Pump cover（18）With the pump housing（8）Interior one stage impeller（9）And sencond stage impeller（3）It is connected；One stage impeller（9）And sencond stage impeller（3）It
Between be provided with interstage diaphragm（7）.
A kind of 2. fast demountable two-stage cantilever centrifugal pump according to claim 1, it is characterised in that：The pump shaft
（2）End set has joint（16）, joint（16）And pump shaft（2）Between be provided with annular groove（14）；The annular groove（14）It is interior
It is provided with split type snap ring（13）, split type snap ring（13）Pass through the first attachment screw（17）With joint（16）The cutting ferrule of end
（15）It is connected；Cutting ferrule（15）End face and one stage impeller（9）Front end be in contact.
A kind of 3. fast demountable two-stage cantilever centrifugal pump according to claim 1, it is characterised in that：The pump shaft
（2）It is upper to be located at one stage impeller（9）And sencond stage impeller（3）Between be provided with axle sleeve between level（11）, axle sleeve between level（11）External diameter it is big
In one stage impeller（9）And sencond stage impeller（3）Hub outside diameter；The interstage diaphragm（7）Inner side passes through internal liner（12）With level
Between axle sleeve（11）It is engaged.
A kind of 4. fast demountable two-stage cantilever centrifugal pump according to claim 1, it is characterised in that：The level interval
Plate（7）Outer rim be provided with adapter sleeve, the front end face and the pump housing of the adapter sleeve（8）Internal boss coordinates；Adapter sleeve and convex
O-ring seal is provided between platform（6）；The rear end face of adapter sleeve passes through the second attachment screw（4）With the pump cover（18）Connection.
A kind of 5. fast demountable two-stage cantilever centrifugal pump according to claim 1, it is characterised in that：The level interval
Plate（7）It is arranged to discoidal cell body, hand of helix is provided with runner hole in the side wall of cell body（5）, the pump housing（8）On
Corresponding to runner hole（5）It is provided with runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720605553.9U CN206785748U (en) | 2017-05-27 | 2017-05-27 | A kind of fast demountable two-stage cantilever centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720605553.9U CN206785748U (en) | 2017-05-27 | 2017-05-27 | A kind of fast demountable two-stage cantilever centrifugal pump |
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| Publication Number | Publication Date |
|---|---|
| CN206785748U true CN206785748U (en) | 2017-12-22 |
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ID=60714358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720605553.9U Active CN206785748U (en) | 2017-05-27 | 2017-05-27 | A kind of fast demountable two-stage cantilever centrifugal pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973394A (en) * | 2019-04-12 | 2019-07-05 | 丹东克隆先锋泵业有限公司 | Double drive second level magnetic drive pumps |
| CN114233635A (en) * | 2022-02-10 | 2022-03-25 | 浙江水泵总厂有限公司 | Pump body structure and centrifugal pump with same |
| CN114635856A (en) * | 2022-03-11 | 2022-06-17 | 烟台龙港泵业股份有限公司 | High-temperature high-pressure vertical pipeline pump |
-
2017
- 2017-05-27 CN CN201720605553.9U patent/CN206785748U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973394A (en) * | 2019-04-12 | 2019-07-05 | 丹东克隆先锋泵业有限公司 | Double drive second level magnetic drive pumps |
| CN114233635A (en) * | 2022-02-10 | 2022-03-25 | 浙江水泵总厂有限公司 | Pump body structure and centrifugal pump with same |
| WO2023151114A1 (en) * | 2022-02-10 | 2023-08-17 | 浙江水泵总厂有限公司 | Pump body structure and centrifugal pump having same |
| CN114635856A (en) * | 2022-03-11 | 2022-06-17 | 烟台龙港泵业股份有限公司 | High-temperature high-pressure vertical pipeline pump |
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