CN203717361U - Double suction double-stage anti-cavitation centrifugal oil pump - Google Patents
Double suction double-stage anti-cavitation centrifugal oil pump Download PDFInfo
- Publication number
- CN203717361U CN203717361U CN201420064206.6U CN201420064206U CN203717361U CN 203717361 U CN203717361 U CN 203717361U CN 201420064206 U CN201420064206 U CN 201420064206U CN 203717361 U CN203717361 U CN 203717361U
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- CN
- China
- Prior art keywords
- rotating shaft
- impeller
- stage
- pump
- pump housing
- 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.)
- Expired - Lifetime
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
The utility model is used for delivering high-temperature high-pressure dangerous liquid, and particularly relates to a double suction double-stage anti-cavitation centrifugal oil pump. A rotating shaft is provided with a first stage impeller corresponding to a suction inlet, and is provided with a second stage impeller corresponding to a discharge opening; the outer sides of the first stage impeller and the second stage impeller are respectively provided with a left thread sleeve and a right thread sleeve; the outer sides of the left and right thread sleeves are provided with sealing devices; an interstage lining is arranged between the first stage impeller and the second stage impeller and close to the second stage impeller; the left and right thread sleeves and the interstage lining are arranged between a pump body and the rotating shaft; the sealing devices at two ends are arranged between pump covers at corresponding ends and the rotating shaft; the outer sides of two pump covers are provided with a bracket respectively; the outer side of each bracket is provided with a rolling bearing assembly; each rolling bearing assembly is arranged on the rotating shaft. The double suction double-stage anti-cavitation centrifugal oil pump is high in efficiency and high in anti-cavitation performance; a performance curve is flat without humps, a high efficiency area is wide, and an application range is wide; the double suction double-stage anti-cavitation centrifugal oil pump is suitable for high-temperature media.
Description
Technical field
The utility model relates to a kind of double suction twin-stage anti-cavitation centrifugal oil pump, is widely used in the fields such as petrochemical industry, chemical industry, light industry, oil, for delivery of the dangerous liquid of various oil products or other High Temperature High Pressure.
Background technique
Centrifugal oil pump is the visual plant of petrochemical plant, according to statistics, to the demand of centrifugal oil pump about 50,000 every year of domestic markets, total sales volume surpasses 1,500,000,000 yuan, is very important universal machine product.In recent years, along with the fast development of China's oil chemical industry, the scale of petrochemical plant is increasing, correspondingly, centrifugal oil pump product has also been proposed to new technical requirements.First, more and more higher to the requirement of range of flow and anti-cavitation performance.Under large flow rate working conditions condition, because the flow velocity of Pump Suction Nozzle is higher, therefore, be very easy to occur cavitation.Cavitation not only can reduce the working life of pump greatly, when serious, also can cause whole device normally to work, and causes huge economic loss.Secondly, the pursuit of modern society to energy-conserving and environment-protective technology, also has higher requirement to the efficiency of large-scale pump.And the traditional centrifugal oil pump product ubiquity of China the shortcoming such as lack large flow specification, efficiency is on the low side and net positive suction head is higher, be difficult to adapt to the new variation in petrochemical industry market.
Model utility content
The technical problems to be solved in the utility model is: provide a kind of simple in structure, mounting or dismounting are convenient and can improve hydraulic efficiency, reduce energy consumption, long service life, economical operation, safe and reliable double suction twin-stage anti-cavitation centrifugal oil pump.
Double suction twin-stage anti-cavitation centrifugal oil pump described in the utility model, comprise the pump housing and rotating shaft, suction port and discharge opening are set respectively on the pump housing, pump housing two ends arrange respectively front pump cover and rear pump cover, in the pump housing, be penetrated with rotating shaft, it is characterized in that: in rotating shaft, corresponding suction port arranges first stage impeller, corresponding discharge opening arranges secondary impeller, the outside of first stage impeller and secondary impeller arranges respectively left swivel nut and right swivel nut, the outside of left swivel nut and right swivel nut all arranges seal arrangement, between first stage impeller and secondary impeller, near secondary impeller place, internal liner is set, left swivel nut, right swivel nut, and internal liner is installed between the pump housing and rotating shaft, the seal arrangement at two ends is installed between the pump cover and rotating shaft of respective end, two pump cover outsides arrange respectively bracket, bracket outside arranges respectively rolling bearing assembly, rolling bearing assembly is arranged in rotating shaft.
This pump first stage impeller adopts double suction structure, simple and compact for structure, reliable and stable, greatly reduces necessary NPSH, can effectively improve anti-cavitation performance, and this pump can adopt higher rotating speed, improves the hydraulic efficiency of pump, reduces energy consumption.All vertically upward, shaft seal adopts mechanical seal for this pump intake and exhaust port, and be furnished with cooling, rinse or sealing Laemmli buffer system Laemmli, the first stage impeller swivel nut that keeps left is fixed, the secondary impeller swivel nut of keeping right is fixed, structural stability, fastening.
Before one end of described first stage impeller is placed in front pump cover and rotating shaft, the other end is placed between the pump housing and rotating shaft, impeller ring and casing ring are all set between first stage impeller and front pump cover, the pump housing from the inside to the outside, before one end of secondary impeller is placed in rear pump cover and rotating shaft, the other end is placed between the pump housing and rotating shaft, and impeller ring and casing ring are all set between secondary impeller and rear pump cover, the pump housing from the inside to the outside.Can improve sealing effect, increase pressure, improve hydraulic efficiency.
The beneficial effects of the utility model are:
High efficiency: η=70%, higher by 4% than domestic like product efficiency, high-cavitation-resistance energy; Performance curve is smooth, and without hump, efficient district is wide, and using scope is wide; Be applicable to high temperature media, medium temperature reaches as high as 400 ℃, owing to having high-cavitation-resistance, can be applicable to carry that low-carbon (LC) is easily vaporized, the danger medium such as inflammable, explosive; The advanced vibration of structure is little, by NBS, reaches A level; Noise is low, by NBS, reaches B level.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1, rotating shaft 2, seal arrangement 3, front pump cover 4, suction port 5, the pump housing 6, discharge opening 7, rear pump cover 8, rolling bearing assembly 9, right swivel nut 10, secondary impeller 11, internal liner 12, first stage impeller 13, casing ring 14, impeller ring 15, left swivel nut 16, bracket.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
As shown in Figure 1, double suction twin-stage anti-cavitation centrifugal oil pump described in the utility model, comprise the pump housing 5 and rotating shaft 1, suction port 4 and discharge opening 6 are set respectively on the pump housing 5, the pump housing 5 two ends arrange respectively front pump cover 3 and rear pump cover 7, in the pump housing 5, be penetrated with rotating shaft 1, in rotating shaft 1, corresponding suction port 4 arranges first stage impeller 12, corresponding discharge opening 6 arranges secondary impeller 10, the outside of first stage impeller 12 and secondary impeller 10 arranges respectively left swivel nut 15 and right swivel nut 9, the outside of left swivel nut 15 and right swivel nut 9 all arranges seal arrangement 2, between first stage impeller 12 and secondary impeller 10, near secondary impeller 10 places, internal liner 11 is set, left swivel nut 15, right swivel nut 9, and internal liner 11 is installed between the pump housing 5 and rotating shaft 1, the seal arrangement 2 at two ends is installed between the pump cover and rotating shaft 1 of respective end, two pump cover outsides arrange respectively bracket 16, bracket 16 outsides arrange respectively rolling bearing assembly 8, rolling bearing assembly 8 is arranged in rotating shaft 1.Before one end of first stage impeller 12 is placed in front pump cover 3 and rotating shaft 1, the other end is placed between the pump housing 5 and rotating shaft 1, impeller ring 14 and casing ring 13 are all set between first stage impeller 12 and front pump cover 3, the pump housing 5 from the inside to the outside, before one end of secondary impeller 10 is placed in rear pump cover 7 and rotating shaft 1, the other end is placed between the pump housing 5 and rotating shaft 1, and impeller ring 14 and casing ring 13 are all set between secondary impeller 10 and rear pump cover 7, the pump housing 5 from the inside to the outside.The suction volute chamber of secondary impeller 10 outwardly.
During work, drive unit drives rotating shaft 1 rotation, and liquid enters first-stage double suction impeller from suction port 4, by being sucked volute chamber and passed to secondary impeller 10 by spue volute chamber, secondary of one-level after first stage impeller 12 superchargings of High Rotation Speed, liquid is transported to discharge opening 6.
Claims (3)
1. a double suction twin-stage anti-cavitation centrifugal oil pump, comprise the pump housing (5) and rotating shaft (1), suction port (4) and discharge opening (6) are set respectively on the pump housing (5), the pump housing (5) two ends arrange respectively front pump cover (3) and rear pump cover (7), in the pump housing (5), be penetrated with rotating shaft (1), it is characterized in that: the upper corresponding suction port (4) of rotating shaft (1) arranges first stage impeller (12), corresponding discharge opening (6) arranges secondary impeller (10), the outside of first stage impeller (12) and secondary impeller (10) arranges respectively left swivel nut (15) and right swivel nut (9), the outside of left swivel nut (15) and right swivel nut (9) all arranges seal arrangement (2), between first stage impeller (12) and secondary impeller (10), near secondary impeller (10), locate to arrange internal liner (11), left swivel nut (15), right swivel nut (9), and internal liner (11) is installed between the pump housing (5) and rotating shaft (1), the seal arrangement at two ends (2) is installed between the pump cover and rotating shaft (1) of respective end, two pump cover outsides arrange respectively bracket (16), bracket (16) outside arranges respectively rolling bearing assembly (8), rolling bearing assembly (8) is arranged in rotating shaft (1).
2. double suction twin-stage anti-cavitation centrifugal oil pump according to claim 1, it is characterized in that: one end of first stage impeller (12) is placed in front pump cover (3) and rotating shaft (1) before, the other end is placed between the pump housing (5) and rotating shaft (1), first stage impeller (12) and front pump cover (3), impeller ring (14) and casing ring (13) are all set between the pump housing (5) from the inside to the outside, one end of secondary impeller (10) is placed in rear pump cover (7) and rotating shaft (1) before, the other end is placed between the pump housing (5) and rotating shaft (1), secondary impeller (10) and rear pump cover (7), impeller ring (14) and casing ring (13) are all set between the pump housing (5) from the inside to the outside.
3. double suction twin-stage anti-cavitation centrifugal oil pump according to claim 1 and 2, is characterized in that: the suction volute chamber of secondary impeller (10) outwardly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420064206.6U CN203717361U (en) | 2014-02-13 | 2014-02-13 | Double suction double-stage anti-cavitation centrifugal oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420064206.6U CN203717361U (en) | 2014-02-13 | 2014-02-13 | Double suction double-stage anti-cavitation centrifugal oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203717361U true CN203717361U (en) | 2014-07-16 |
Family
ID=51156519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420064206.6U Expired - Lifetime CN203717361U (en) | 2014-02-13 | 2014-02-13 | Double suction double-stage anti-cavitation centrifugal oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203717361U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791254A (en) * | 2015-04-22 | 2015-07-22 | 大连深蓝泵业有限公司 | High-power axial subdivision double-suction two-staged pump |
-
2014
- 2014-02-13 CN CN201420064206.6U patent/CN203717361U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791254A (en) * | 2015-04-22 | 2015-07-22 | 大连深蓝泵业有限公司 | High-power axial subdivision double-suction two-staged pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190523 Granted publication date: 20140716 |
|
| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220523 Granted publication date: 20140716 |
|
| PD01 | Discharge of preservation of patent | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20220523 Granted publication date: 20140716 |
|
| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20240213 Granted publication date: 20140716 |