CN2764982Y - Vertical double suction ship and ship used centrifugal pump - Google Patents
Vertical double suction ship and ship used centrifugal pump Download PDFInfo
- Publication number
- CN2764982Y CN2764982Y CN 200420108925 CN200420108925U CN2764982Y CN 2764982 Y CN2764982 Y CN 2764982Y CN 200420108925 CN200420108925 CN 200420108925 CN 200420108925 U CN200420108925 U CN 200420108925U CN 2764982 Y CN2764982 Y CN 2764982Y
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- Prior art keywords
- double
- suction
- pump
- inducer
- impeller
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- Expired - Fee Related
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Abstract
The utility model discloses a vertical double suction centrifugal pump for ships and boats, which is composed of guiding wheels, a double suction impeller, a sealing device, a shaft coupling, an electrical motor, a bracket, a pump body, a pump shaft and a supporting bearing, wherein the guiding wheels are coaxial with the double suction impeller and are positioned at both sides of a suction inlet of the double suction impeller. The guiding wheels are arranged before the suction inlet of the impeller, so the medium pressure value at the suction inlet of the impeller can be increased. Moreover, uniform velocity of flow of medium flow can be obtained. The suction condition of the pump is improved effectively, namely, the condition of the generation of cavitation erosion occurring to the pump can be reduced. The utility model is particularly suitable to be used for centrifugal pumps with large aperture and large flow rate.
Description
Technical field
The utility model relates to a kind of centrifugal pump, and specifically, the utility model relates to a kind of vertical double suction warship, marine centrifugal pump.
Background technique
Warship, ship cabin are water, vapour, the intensive relatively place of oil-piping system, and ducted medium input and output are realized that by the pump product centrifugal pump is to use one of maximum pump kind in warship, ship pipe-line system.Limited because of the plan-position in warship, the ship cabin, the structural type of used centrifugal pump is many with vertical structure.The vertical double suction warship of prior art, marine centrifugal pump, basically can satisfy the usage requirement of warship, ship pipe-line system fed sheet of a media, but, the big flow centrifugal pump of prior art is thicker because of the suction pipe bore, during the impeller rotation, form the local negative pressure zone at the suction eye place, medium obtains in the suction pipe flow velocity and pressure are inhomogeneous, the pipeline middle part is strong, and nearly tube wall place is the most weak, and cavitation phenomenons easily takes place pump under this working condition, make pump duty and lift not be linear change, the efficient of pump reduces, and with vibration and noise, causes the impeller spot corrosion to damage when serious.
The model utility content
Have the high problem of necessary NPSH value at prior art, the technical problems to be solved in the utility model provides a kind of simple in structure, can effectively improve suction condition, reduces vertical double suction warship, the marine centrifugal pump of necessary NPSH value.
For solving the problems of the technologies described above, the utility model is achieved through the following technical solutions: promptly a kind of vertical double suction warship, marine centrifugal pump, it comprises the pump housing, double-entry impeller, pump shaft, seal arrangement, carriage, coupling, block bearing and the motor with double suction inlet, and the double suction entrance of the described pump housing also is provided with inducer; Described inducer is coaxial with double-entry impeller, places the suction eye both sides respectively, and the big end face of inducer is towards the double-entry impeller suction port, and small end faces the suction port of the pump housing.
Before the double-entry impeller suction port, inducer is set, has improved suction eye place pressure medium value, and make MEDIA FLOW obtain the flow velocity and the pressure of uniformity, improved the suction condition of pump effectively, that is to say the formation condition that reduces pump generation cavitation.
The utility model compared with prior art only respectively increases an inducer before the suction port of double-entry impeller both sides, improve the suction condition of pump effectively.Under identical working condition, vertical double suction warship of the present utility model, marine centrifugal pump necessary NPSH value are low, and pump operation is steady, noise is low, efficient is high.
Description of drawings
Accompanying drawing is the structural representation of the vertical double suction warship of the utility model, marine centrifugal pump.
Embodiment
A kind of vertical double suction warship shown in the drawings, marine centrifugal pump, it is made of inducer 1, double-entry impeller 2, seal arrangement 3, coupling 4, motor 5, carriage 6, the pump housing 7, pump shaft 8 and block bearing 9.Pump intake is symmetrically placed in the pump housing 7 runner both sides, double-entry impeller 2 is fixedly connected on the pump housing 7 runner places by pump shaft 8, in the both sides arranged coaxial of double-entry impeller 2 suction ports two identical parameters, but the inducer 1 that the helix rotation direction is opposite, suction port one side is installed left-handed inducer in the double-entry impeller upper end, and suction port one side in lower end is installed the inducer of dextrorotation.Pump shaft 8 lower ends connect seal arrangement 3 and block bearing 9, and pump shaft 8 upper ends connect seal arrangement 3, block bearing 9, coupling 4 successively, and the output shaft of motor 5 is through coupling 4 and 8 vertical connections of pump shaft, and carriage 6 is members that motor 5 combines with the pump housing 7.
When vertical double suction warship of the present utility model, marine centrifugal pump work, inducer 1 and double-entry impeller 2 coaxial rotations, the suction condition of inducer 1 rotation improvement double-entry impeller 2 suction ports of helix structure, promptly improve the pressure medium that is inhaled into, and make MEDIA FLOW obtain the flow velocity of uniformity, reduce the formation condition of pump generation cavitation effectively.
Claims (3)
1, a kind of vertical double suction warship, marine centrifugal pump, it comprises the pump housing (7), double-entry impeller (2), pump shaft (8), seal arrangement (3), carriage (6), coupling (4), block bearing (9) and the motor (5) with double suction inlet, and it is characterized in that: the double suction entrance of the described pump housing (7) also is provided with inducer (1); Described inducer (1) is coaxial with double-entry impeller (2), places double-entry impeller (2) suction port both sides respectively, and the big end face of inducer (1) is towards double-entry impeller (2) suction port, and small end faces the pump housing (7) suction port.
2, a kind of vertical double suction warship according to claim 1, marine centrifugal pump is characterized in that: described inducer (1) is a single coil configuration, and its helical pitch equates with pitch.
3, a kind of vertical double suction warship according to claim 1 and 2, marine centrifugal pump, it is characterized in that: the helix of described inducer (1) has the left and right two kinds of structures of revolving, left-handed inducer (1) is contained in suction port place, double-entry impeller (2) top, and the inducer of dextrorotation (1) is contained in double-entry impeller (suction port place, 2 bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420108925 CN2764982Y (en) | 2004-11-19 | 2004-11-19 | Vertical double suction ship and ship used centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420108925 CN2764982Y (en) | 2004-11-19 | 2004-11-19 | Vertical double suction ship and ship used centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2764982Y true CN2764982Y (en) | 2006-03-15 |
Family
ID=36167901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420108925 Expired - Fee Related CN2764982Y (en) | 2004-11-19 | 2004-11-19 | Vertical double suction ship and ship used centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2764982Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015014A (en) * | 2016-07-13 | 2016-10-12 | 海门市金凯电动工具有限公司 | Improved stranding cage pump |
-
2004
- 2004-11-19 CN CN 200420108925 patent/CN2764982Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015014A (en) * | 2016-07-13 | 2016-10-12 | 海门市金凯电动工具有限公司 | Improved stranding cage pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060315 Termination date: 20131119 |