CN207437372U - Two-stage cantilever type efficient centrifugal pump - Google Patents
Two-stage cantilever type efficient centrifugal pump Download PDFInfo
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- CN207437372U CN207437372U CN201721503473.9U CN201721503473U CN207437372U CN 207437372 U CN207437372 U CN 207437372U CN 201721503473 U CN201721503473 U CN 201721503473U CN 207437372 U CN207437372 U CN 207437372U
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- impeller
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- pump
- inlet cover
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Abstract
The utility model discloses a kind of two-stage cantilever type efficient centrifugal pumps, inlet cover including pump case and mounted on pump case front end, pump case front end is equipped with impeller cavity, it is equipped with first stage impeller, first-level guide blade, stage casing, secondary impeller and secondary guide vane in impeller cavity successively from the front to the back, inlet cover is equipped with sealing device with pump case junction, sealing device is equipped between stage casing front and back end and inlet cover, pump case simultaneously, the internal diameter of rear choma is more than the internal diameter of preoral loop.The utility model uses both stage impellers structure, not only simplifies structure, reduces maintenance difficulty, while improves efficiency compared with single-stage pump, reduces energy consumption, and also has the advantages that good airproof performance, rapid heat dissipation, service life are long.
Description
Technical field
The utility model is related to a kind of two-stage cantilever type efficient centrifugal pumps.
Background technology
For the different areas of activity that lift air lift is 140-190m, using the single-stage efficiency of pump is relatively low, energy consumption is higher, and use more
Grade pump configuration is then complicated, and maintenance difficulty is big.
On the other hand, centrifugal pump of the prior art also presence easily leakage, the big influence efficiency of axial force and bearing life
Defect.
Utility model content
The utility model proposes a kind of two-stage cantilever type efficient centrifugal pump, the purpose is to：（1）One kind is provided to be suitable for
The centrifugal pump of 140-190m lift air lifts improves efficiency, reduces energy consumption, simplifies structure, reduces maintenance difficulty；（2）Solve centrifugation
The leakage problem of pump；（3）The axially loaded of rotor axial system is reduced, improves service life.
A kind of two-stage cantilever type efficient centrifugal pump, the inlet cover including pump case and mounted on pump case front end are set in inlet cover
There is pump intake, pump case is equipped with pump discharge, and the pump case front end is equipped with impeller cavity, and the pump intake passes through impeller cavity and pump discharge
It communicates, further includes the main shaft being mounted on by bearing in pump case, first stage impeller, head are equipped with successively from the front to the back in the impeller cavity
Grade guide vane, stage casing, secondary impeller and secondary guide vane, the first stage impeller and secondary impeller are mounted on main shaft by impeller nut
On；
Preoral loop in the inlet cover is installed, gap is left between the preoral loop and first stage impeller；
The inlet cover is equipped with sealing ring with pump case junction；
The stage casing includes annular section and rear end face, between stage casing annular section front end and entrance cover back-end, Yi Jizhong
Gasket is equipped between section annular section rear end and pump case impeller cavity wall, and the stage casing rear end face is equipped with endoporus, at the endoporus
Sealing ring is installed, the front end of the secondary impeller is engaged with the sealing ring；
The rear end of the secondary guide vane is equipped with endoporus, and rear choma, the rear choma and secondary impeller are equipped in the endoporus
Between leave gap；
The internal diameter of choma is more than the internal diameter of preoral loop after described.
As further improvement of the utility model：After described the internal diameter of choma and the ratio between internal diameter of preoral loop for 1.5 to
1.6。
As further improvement of the utility model：Bearing housing is additionally provided on the pump case, the bearing includes being mounted on
The deep groove ball bearing of bearing housing front end and the pairing bearing group mounted on bearing box back are installed in the inner cavity of the bearing housing
There is cooling tube.
As further improvement of the utility model：The cooling tube includes tube body, and the tube body both ends pass through pipe respectively
Connector is connected with pump case, and undulatory fin is set on the tube body.
As further improvement of the utility model：Gland seal assembly is further included, the gland seal assembly is mounted in pump case, position
On rear side of impeller cavity, the front side of bearing, and contacted with the main shaft seal.
Compared with the prior art, the utility model has the positive effect that：（1）It is not only simple using both stage impellers structure
Change structure, reduced maintenance difficulty, while efficiency is improved compared with single-stage pump, reduce energy consumption；（2）Using two layers of sealing
Structure is sealed between inlet cover and pump case using sealing ring, while stage casing front/rear end is using gasket and inlet cover and pump case
It realizes sealing, effectively prevents from revealing；（3）By increasing deutostoma ring diameter, the mode more than prosopyle ring diameter is allowed to, increases impeller
The axial force of intracavity liquid drive rotor shafting forward offsets the axial force of partial inlet, reduces whole axial force, improves and use
Service life；（4）Cooling tube is connected using pipe fitting with pump case, easy to disassemble, while uses fin cooling structure, improves bearing
Heat dissipation effect.
Description of the drawings
Fig. 1 is the structure diagram of the utility model.
Fig. 2 is the structure diagram of cooling tube part.
Specific embodiment
The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings：
Such as Fig. 1, a kind of two-stage cantilever type efficient centrifugal pump, flow Q=80m3/h, lift air lift H=190m, including pump case 6
With the inlet cover 1 mounted on 6 front end of pump case, the two junction is equipped with sealing ring, and machined surface is left in 6 bottom of pump case, using center
Supporting way.
Inlet cover 1 is equipped with pump intake, and pump case 6 is equipped with pump discharge, and 6 front end of pump case is equipped with impeller cavity, the pump
Entrance is communicated by impeller cavity with pump discharge, further includes the main shaft 10 being mounted on by bearing in pump case 6, in the impeller cavity by
First stage impeller 3, first-level guide blade 4, stage casing 5, secondary impeller 8 and secondary guide vane 7,3 He of first stage impeller are equipped with after forward direction successively
Secondary impeller 8 is mounted on by impeller nut 2 on main shaft 10；
Preoral loop in the inlet cover 1 is installed, gap is left between the preoral loop and first stage impeller 3, for impeller
The forward end seal of chamber.
The stage casing 5 include annular section and rear end face, between 5 annular section front end of stage casing and 1 rear end of inlet cover and
Gasket is equipped between 6 impeller cavity wall of 5 annular section rear end of stage casing and pump case, 5 rear end face of stage casing is equipped with endoporus, this is interior
Sealing ring is installed, the front end of the secondary impeller 8 is engaged with the sealing ring at hole；
The rear end of the secondary guide vane 7 is equipped with endoporus, and rear choma, the rear choma and secondary impeller are equipped in the endoporus
Gap is left between 8, for the back-end sealing of impeller cavity.
It is described after choma internal diameter be more than preoral loop internal diameter, it is preferred that it is described after choma internal diameter and preoral loop it is interior
The ratio between footpath is 1.5 to 1.6, the axial force of increase impeller intracavity liquid drive rotor shafting forward, offsets the axial direction of partial inlet
Power, reduces whole axial force, and remaining axial force is undertaken by the pairing bearing group of rear end.
Be additionally provided with bearing housing on the pump case 6, the bearing include mounted on bearing housing front end deep groove ball bearing and
Mounted on the pairing bearing group of bearing box back, machine oil is held in the bearing box cavity, and cooling tube 11 is installed.
Such as Fig. 2, the cooling tube 11 includes tube body 11-1, and the tube body 11-1 both ends pass through the standard on pipe fitting respectively
Pipe screw thread is connected with pump case 6, and as coolant inlet, the other end is outlet, carries out circulating cooling, the tube body 11-1 for one end
On be set with undulatory fin 11-2, increasing heat radiation area.
Such as Fig. 1, this centrifugal pump further includes gland seal assembly 9, and the gland seal assembly 9 is mounted in pump case 6, after impeller cavity
Side, the front side of bearing, and it is in sealing contact with the main shaft 10, prevent liquid from entering 6 rear portion of pump case.
Seal assembly realizes sealing using sealing ring, oil sealing or labyrinth seal structure.
During assembling, the installation of gland seal assembly 9, main shaft 10 is first carried out, secondary guide vane 7 is then packed into pump case 6, then by secondary
Impeller 8 is installed on main shaft 10, and stage casing 5 then is packed into pump case 6, then first stage impeller 3 is packed into first-level guide blade 4 and is integrally attached to
On main shaft 10, first stage impeller 3 and secondary impeller 8 are fastened on main shaft 10 with impeller nut 2, finally by inlet cover 1 and pump case 6
It is connected.
During work, liquid is entered by pump intake, subsequently into first stage impeller 3, after chopped-off head centrifugation pressurization, passes through chopped-off head
Guide vane 4 is entered in secondary impeller 8, is exported using after secondary centrifugation pressurization from pump discharge.
The efficiency of country's energy-conserving product ZA50-3400 single-stage pumps is 50% at present, using newly-designed efficient two-stage cantilevered
Centrifugal pump, efficiency can be improved to 69%, and shaft power differs more than 22.8kw, and in petrochemical industry, density is based on 700kg/m3
It calculates, it is assumed that annual operation 360 days, an annual pump can be with energy saving 22.8*0.7*24*360=13.8 ten thousand degree, and energy-saving effect is apparent,
General AY two-stage oil pump efficient points more current than petrochemical industry are higher by 10 percentage points.
Claims (5)
1. two-stage cantilever type efficient centrifugal pump, including pump case（6）With mounted on pump case（6）The inlet cover of front end（1）, inlet cover
（1）It is equipped with pump intake, pump case（6）It is equipped with pump discharge, the pump case（6）Front end is equipped with impeller cavity, and the pump intake passes through
Impeller cavity is communicated with pump discharge, is further included and is mounted on pump case by bearing（6）In main shaft（10）, it is characterised in that：The leaf
It takes turns and is equipped with first stage impeller in chamber successively from the front to the back（3）, first-level guide blade（4）, stage casing（5）, secondary impeller（8）With secondary guide vane
（7）, the first stage impeller（3）And secondary impeller（8）Pass through impeller nut（2）Mounted on main shaft（10）On；
The inlet cover（1）On preoral loop, the preoral loop and first stage impeller are installed（3）Between leave gap；
The inlet cover（1）With pump case（6）Junction is equipped with sealing ring；
The stage casing（5）Including annular section and rear end face, stage casing（5）Annular section front end and inlet cover（1）Between rear end, with
And stage casing（5）Annular section rear end and pump case（6）Gasket, the stage casing are equipped between impeller cavity wall（5）Rear end face is equipped with
Endoporus is equipped with sealing ring, the secondary impeller at the endoporus（8）Front end be engaged with the sealing ring；
The secondary guide vane（7）Rear end be equipped with endoporus, rear choma is installed in the endoporus, it is described after choma and secondary impeller
（8）Between leave gap；
The internal diameter of choma is more than the internal diameter of preoral loop after described.
2. two-stage cantilever type efficient centrifugal pump as described in claim 1, it is characterised in that：The internal diameter and prosopyle of choma after described
The ratio between internal diameter of ring is 1.5 to 1.6.
3. two-stage cantilever type efficient centrifugal pump as described in claim 1, it is characterised in that：The pump case（6）On be additionally provided with axis
Case is held, the bearing includes the deep groove ball bearing mounted on bearing housing front end and the pairing bearing mounted on bearing box back
Group is equipped with cooling tube in the inner cavity of the bearing housing（11）.
4. two-stage cantilever type efficient centrifugal pump as claimed in claim 3, it is characterised in that：The cooling tube（11）Including tube body
（11-1）, the tube body（11-1）Both ends pass through pipe fitting and pump case respectively（6）It is connected, the tube body（11-1）On be set with
Undulatory fin（11-2）.
5. the two-stage cantilever type efficient centrifugal pump as described in Claims 1-4 is any, it is characterised in that：Further include gland seal assembly
（9）, the gland seal assembly（9）Mounted on pump case（6）In, on rear side of the impeller cavity, the front side of bearing, and with the main shaft（10）
It is in sealing contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721503473.9U CN207437372U (en) | 2017-11-13 | 2017-11-13 | Two-stage cantilever type efficient centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721503473.9U CN207437372U (en) | 2017-11-13 | 2017-11-13 | Two-stage cantilever type efficient centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207437372U true CN207437372U (en) | 2018-06-01 |
Family
ID=62288957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721503473.9U Active CN207437372U (en) | 2017-11-13 | 2017-11-13 | Two-stage cantilever type efficient centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207437372U (en) |
-
2017
- 2017-11-13 CN CN201721503473.9U patent/CN207437372U/en active Active
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