CN205064285U - Two -stage centrifugal pump is supported at radial subdivision both ends - Google Patents
Two -stage centrifugal pump is supported at radial subdivision both ends Download PDFInfo
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- CN205064285U CN205064285U CN201520788217.3U CN201520788217U CN205064285U CN 205064285 U CN205064285 U CN 205064285U CN 201520788217 U CN201520788217 U CN 201520788217U CN 205064285 U CN205064285 U CN 205064285U
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- impeller
- pump
- pump cover
- radial
- ring
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a two -stage centrifugal pump is supported at radial subdivision both ends installs chopped -off head impeller and secondary impeller on the pump shaft, the impeller reaches both sides outward and is equipped with the pump body, pump cover and bearing body, the chopped -off head impeller be that the formula impeller is inhaled to double -suction type impeller, secondary impeller list, increased the flow and the lift of pump, satisfy large -traffic high -lift use occasion, secondary impeller be equipped with axial force balancing unit in going out water side pump cover, balancing unit accomplishes axial equilibrium of forces, has reduced non - drive end mechanical seal department pressure simultaneously, has prolonged life, establish radial diffusion transition runner in the pump body, the transition flow way has diffusion recovered energy and the effect of liquid entering subordinate impeller with higher speed, has guaranteed the high efficiency of complete machine, the bearing body adopts 360 degrees circumference support bearing bodies, has improved the hookup reliability of bearing body and pump cover, has prolonged the life of bearing body, has reduced noise and vibrations to a certain extent, and it is more stable to make the pump operate under complex operating condition.
Description
One, technical field
The utility model relates to mechanical engineering pump class technical field, is a kind of radial subdivision two end supports two-stage centrifugal pump specifically.
Two, background technique
Along with the rapid growth of China's building, oil, petrochemical industry, Environmental Protection Market, Chinese pump industry has welcome powerful life, the spring that the market space of the state's sustainable growth that can be right develop to Chinese pump industrial belt.Single with regard to regard to petroleum chemical industry, before 2003, the working ability of the oil refinery list covering device of China is generally at about 5,000,000 tons/year, but along with China's petrochemical industry develops rapidly, the oil refining apparatus of China to have developed into 1,000 ten thousand tons/year of scales as main oil refinery, even develops into the oversized device of 2,000 ten thousand tons/year.China just will build the mega project such as a collection of more than 1,000 ten thousand tons/year large-scale oil refining, more than 1,000,000 tons/year large-scale ethene, more than 1,000,000 tons/year large-scale PTA successively in " 12 " period in addition.The construction of these mega projects, will drive the maximization of downstream item destination device, and the maximization of device, the maximization of its corresponding corollary equipment of inevitable requirement.With regard to supporting pump, need larger flow, higher lift, larger air horsepower pump series products adapts with it.Current, the kind of pump has multiple, can be divided into the other types such as vane type oil pump, positive displacement pump pump by action principle.Centrifugal pump belongs to the one of vane type oil pump, is divided into single stage centrifugal pump and multistage segmentation centrifugal pump, and in order to increase lift and flow, it is wider general that multistage segmentation centrifugal pump uses.Multistage segmentation centrifugal pump can increase lift, but limits the flow of pump, cannot realize large discharge; Because the volume of multistage centrifugal pump is large, cost is high, is not easy to supporting application.
Three, summary of the invention
In order to solve the deficiencies in the prior art, the purpose of this utility model is to provide a kind of radial subdivision two end supports two-stage centrifugal pump, and this pump can meet client's large discharge, high-lift performance requirement, and volume is little, lightweight.
Realizing the technological scheme that the purpose of this utility model adopts is:
A kind of radial subdivision two end supports two-stage centrifugal pump, comprises bearing support, pump cover, the pump housing, impeller, pump shaft.Pump shaft is provided with first stage impeller and secondary impeller, the pump housing, pump cover and bearing support are equipped with in impeller outer and both sides; It is characterized in that described first stage impeller is double-sided impeller, secondary impeller single-suction impeller; Axial thrust balancing devices is provided with in described secondary impeller water outlet side pump cover; Establish radial diffusion transition runner in the described pump housing, radial diffusion transition runner diffusion area ratio is 2.8; Described bearing support adopts 360 degree of circumferential support bearing suppories.
Be provided with axial thrust balancing devices in described secondary impeller water outlet side pump cover, device comprises equalizing orifice, impeller ring, casing ring, nockbush, balance tube, throat's lining; Equalizing orifice is located at the back of secondary impeller, impeller ring is arranged on impeller back of the body ring place, casing ring matches with impeller ring and is arranged on pump cover, nockbush is arranged on on the pump cover of equalizing orifice corresponding section, throat's lining is arranged on on the pump cover of nockbush corresponding section, balance tube is arranged on the pump housing, and communicates with the inner chamber at lining place of pump cover throat, and the other end of balance tube is connected with the import of pump.
The beneficial effects of the utility model are:
Owing to have employed first-stage double-absorption formula impeller, secondary single-suction impeller, and coordinate with double-sucking type suction chamber and transition runner, increase flow and the lift of pump, improve the cavitation performance of first stage impeller entrance and double suction suction chamber, balance the pressure of Pump Suction Nozzle, widened the application of this type pump, meet the use occasion that large discharge is high-lift.
Owing to being provided with axial thrust balancing devices at anti-drive end pump cover, the balance tube of device connects pump inlet, impeller ring, casing ring, equalizing orifice, nockbush, throat's lining is coordinated to complete axial equilibrium of forces, reduce anti-drive end mechanical seal place pressure simultaneously, extend working life.
Because radial diffusion transition runner diffusion area ratio is 2.8, transition runner has diffusion recovered energy and accelerates the effect that liquid enters subordinate's impeller, ensure that the high efficiency of complete machine.
Because bearing support adopts 360 degree of circumferential support structures, improve the coupling reliability of bearing support and pump cover, extend the working life of bearing support, reduce noise and vibrations to a certain extent, pump is operated under complex working condition more reliable and stable.
Four, accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is the sectional structure chart of the utility model radial subdivision two end supports two-stage centrifugal pump.
Fig. 2 is the partial enlarged drawing of radial subdivision two end supports two-stage centrifugal balance unit for pump axial force 7 of the present utility model.
In figure: 1. bearing support, 2. pump cover, 3. pump shaft, the 4. pump housing, 5. first-stage double-absorption formula impeller, 6. time level single-suction impeller, 7. axial thrust balancing devices, 8. pump cover, 9. bearing support, 10. time level suction chamber, 11. transition runners, 12 suction chambers, 13. pumping chambers.
Five, embodiment:
In the accompanying drawings, a kind of radial subdivision two end supports two-stage centrifugal pump of the utility model, comprises bearing support, pump cover, the pump housing, impeller, pump shaft.Pump shaft 3 is provided with first stage impeller 5 and secondary impeller 5, the pump housing 4, pump cover 2 and 8, bearing support 1 and 9 are equipped with in impeller outer and both sides; It is characterized in that described first stage impeller 5 is double-sided impeller, secondary impeller 6 single-suction impeller; Axial thrust balancing devices 7 is provided with in described secondary impeller 6 water outlet side pump cover 8; Establish radial diffusion transition runner 11 in the described pump housing 4, radial diffusion transition runner 11 diffusion area ratio is 2.8; Described bearing support 1 and 9 adopts 360 degree of circumferential support bearing suppories.Bearing support 1 and 9 can form the circumferential support of 360 ° when connecting with pump cover 2 and 8, uniform load.
Be provided with axial thrust balancing devices 7 in described secondary impeller water outlet side pump cover, device comprises equalizing orifice 14, impeller ring 15, casing ring 16, nockbush 17, balance tube 18, throat's lining 19; Equalizing orifice 14 is located at the back of secondary impeller, impeller ring 15 is arranged on impeller back of the body ring, casing ring 16 matches with impeller ring and is arranged on pump cover 8, nockbush 17 is arranged on on the pump cover 8 of equalizing orifice 14 corresponding section, throat's lining 19 is arranged on on the pump cover 8 of nockbush 17 corresponding section, balance tube 18 is arranged on the pump housing 4, and communicates with the inner chamber at lining place of pump cover 8 throat, and the other end of balance tube 18 is connected with the import of pump.
Connect with secondary suction chamber 10 after the pump housing double volute pumping chamber 13 that described radial diffusion transition runner 11 is located at first stage impeller 5 correspondence.Liquid, by entering radial diffusion transition runner 11 through double volute pumping chamber 13 after impeller, enters secondary suction chamber 10 afterwards.Transition runner 13 has diffusion recovered energy and accelerates the effect that liquid enters subordinate's impeller, ensure that the high efficiency of complete machine.
Claims (3)
1. a radial subdivision two end supports two-stage centrifugal pump, comprises bearing support, pump cover, the pump housing, impeller, pump shaft; Described pump shaft (3) is provided with first stage impeller (5) and secondary impeller (6), the pump housing (4), pump cover (2,8) and bearing support (1,9) are equipped with in impeller outer and both sides; It is characterized in that: described first stage impeller (5) is double-sided impeller, secondary impeller (6) is single-suction impeller; Axial thrust balancing devices (7) is provided with in described secondary impeller (6) water outlet side pump cover (8); Have radial diffusion transition runner (11) in the described pump housing (4), radial diffusion transition runner (11) diffusion area ratio is 2.8; Described bearing support (1,9) adopts 360 degree of circumferential support bearing suppories.
2. radial subdivision two end supports two-stage centrifugal pump as claimed in claim 1, it is characterized in that: described axial thrust balancing devices (7) comprises equalizing orifice (14), impeller ring (15), casing ring (16), nockbush (17), balance tube (18), throat's lining (19), equalizing orifice (14) is located at the back of secondary impeller, impeller ring (15) is arranged on impeller back of the body ring, casing ring (16) matches with impeller ring and is arranged on pump cover (8), nockbush (17) is arranged on the pump cover (8) with equalizing orifice (14) corresponding section, throat's lining (19) is arranged on the pump cover (8) with nockbush (17) corresponding section, balance tube (18) is arranged on the pump housing (4), and communicate with the inner chamber at lining place of pump cover (8) throat, the other end of balance tube (18) is connected with the import of pump.
3. radial subdivision two end supports two-stage centrifugal pump as claimed in claim 1, is characterized in that: connect with secondary suction chamber (10) after described radial diffusion transition runner (11) is located at pump housing double volute pumping chamber (13) corresponding to first stage impeller (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520788217.3U CN205064285U (en) | 2015-09-29 | 2015-09-29 | Two -stage centrifugal pump is supported at radial subdivision both ends |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520788217.3U CN205064285U (en) | 2015-09-29 | 2015-09-29 | Two -stage centrifugal pump is supported at radial subdivision both ends |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205064285U true CN205064285U (en) | 2016-03-02 |
Family
ID=55390848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520788217.3U Expired - Fee Related CN205064285U (en) | 2015-09-29 | 2015-09-29 | Two -stage centrifugal pump is supported at radial subdivision both ends |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205064285U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454437A (en) * | 2019-06-24 | 2019-11-15 | 西安航天泵业有限公司 | A kind of multistage middle open formula centrifugal pump first-stage double-absorption transition runner |
| CN114439770A (en) * | 2021-12-20 | 2022-05-06 | 陕西航天动力高科技股份有限公司 | Compact marine water cannon booster centrifugal pump |
-
2015
- 2015-09-29 CN CN201520788217.3U patent/CN205064285U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454437A (en) * | 2019-06-24 | 2019-11-15 | 西安航天泵业有限公司 | A kind of multistage middle open formula centrifugal pump first-stage double-absorption transition runner |
| CN114439770A (en) * | 2021-12-20 | 2022-05-06 | 陕西航天动力高科技股份有限公司 | Compact marine water cannon booster centrifugal pump |
| CN114439770B (en) * | 2021-12-20 | 2023-09-12 | 陕西航天动力高科技股份有限公司 | Compact marine water cannon booster centrifugal pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20190929 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |