CN103470513A - Direct-connected low-temperature centrifugal pump structure - Google Patents
Direct-connected low-temperature centrifugal pump structure Download PDFInfo
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- CN103470513A CN103470513A CN2013104751876A CN201310475187A CN103470513A CN 103470513 A CN103470513 A CN 103470513A CN 2013104751876 A CN2013104751876 A CN 2013104751876A CN 201310475187 A CN201310475187 A CN 201310475187A CN 103470513 A CN103470513 A CN 103470513A
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- pump shaft
- intermediate support
- direct
- motor
- impeller
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Abstract
The invention relates to low-temperature centrifugal pumps and in particular relates to a direct-connected low-temperature centrifugal pump structure required in petroleum, chemical industry, metallurgy, steel and other industries. The direct-connected low-temperature centrifugal pump structure comprises a motor, wherein a pump spindle is arranged on the motor; an impeller is arranged at the head of the pump spindle; an intermediate support through which the pump spindle penetrates is arranged between the motor and the impeller; a volute which covers the impeller is arranged along the intermediate support; a splash-proof tray is arranged around the pump spindle on the outer side of the motor; a sealing seat through which the pump spindle penetrates is arranged on one side of the intermediate support, close to the impeller; a lipped sealing piece which acts on the pump spindle is arranged on the sealing seat. A low-temperature cryogenic medium can be effectively conveyed and pressurized, and the direct-connected low-temperature centrifugal pump structure is high in reliability, low in cost and convenient to mount, maintain and operate.
Description
Technical field
the present invention relates to low-temperature centrifugal pump, be specially the direct-connected low-temperature centrifugation pump structure that the industries such as a kind of oil, chemical industry, metallurgy, iron and steel need.
Background technique
at present at oil, chemical industry, metallurgical, the industries such as iron and steel, the particularly conveying of low-temperature deep medium, supercharging needs a large amount of low-temperature centrifugal pumps, conventional centrifugal pump on market is all with lighter hydrocarbons, water, oil or solid-liquid mixed media are fed sheet of a media, temperature usually>=-60 ℃, difference due to chosen material, matching gap arranges, the reason of machinery sealing material and type selecting, can not be for the conveying of low-temperature deep≤-125 ℃ medium, the many employings of centrifugal pump sealing mechanical seal, easy evaporation due to cryogenic media, vaporizing property, the easy gassing of stationary ring sealing surface bursts, life-span is shorter, the about 2000h of General Life, the reliability that unit is used is poor, and mechanical seal maintain and replace cost is high.
Summary of the invention
the purpose of this invention is to provide a kind of direct-connected low-temperature centrifugation pump structure that conveying, supercharging and reliability are high, cost is low, installation and maintenance is easy to operate that can effectively realize the low-temperature deep medium.
above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of direct-connected low-temperature centrifugation pump structure, comprise motor, described motor is equipped with pump shaft, described pump shaft head is equipped with impeller, be provided with the intermediate support passed for described pump shaft between described motor and impeller, be provided with the spiral case that covers in described impeller along described intermediate support, the described motor outside is provided with anti-splashing disk around described pump shaft, described intermediate support is equipped with the sealing seat passed for described pump shaft by impeller one side, described sealing seat is provided with the lip seal that acts on described pump shaft.
in technique scheme, overall structure is stable, good airproof performance, longer service life, the hermetically storing chamber of intermediate support, sealing seat and a medium of spiral case formation is carried, supercharging, rely on the pressure of medium, the sealing of employing lip seal, make the lip limit be close to pump shaft, realize sealing, the lip limit can adopt special material to make, wear resistance is good, can anti--196 ℃ low temperature, be provided with anti-splashing disk between motor and intermediate support, prevent seal failure after cryogenic liquide directly impact motor, cause the cold damage of motor.
as to of the present invention preferably, intermediate support is provided with the nitrogen blowing joint that acts on lip seal.By accessing approximately 0.05～0.1MPa drying nitrogen, lip seal is purged, prevent that steam from entering, freeze at low temperatures, freeze lip seal, during running, cause the sealing lip limit to damage.
as to of the present invention preferably, the lip seal both sides are respectively equipped with the seal ring that is installed on intermediate support and sealing seat and acts on pump shaft.Further enhanced leaktightness effect.
as to of the present invention preferably, anti-splashing disk comprise over against the disk of the flat of intermediate support with is connected the stable installation base station for fixing with pump shaft by motor one side with described disk one.After can more effectively preventing seal failure on the one hand, cryogenic liquide directly impacts motor, causes the cold damage of motor, on the other hand, be convenient to its installation, and this structure can be not influential to the running of the pump housing, can keep the stressed evenly also steady running of pump shaft, reduce noise simultaneously, increase the service life.
as to of the present invention preferred, stablize the installation base station and be provided with the pilot hole perpendicular to pump shaft.Guarantee fastness and the stability of structure.
beneficial effect of the present invention: this structure is better for conveying, the pressurized effect of low-temperature deep medium; Improved the sealing life of unit, can reach 4000h, and then extended service cycle, improved the reliability of unit, reduced the maintenance operation cost simultaneously, the installation and maintenance operation is also more convenient.
The accompanying drawing explanation
fig. 1 is the structural representation of the embodiment of the present invention 1.
in figure: 1, motor, 2, pump shaft, 3, anti-splashing disk, 4, the nitrogen blowing joint, 5, intermediate support, 6, lip seal, 7, sealing seat, 8, impeller, 9, spiral case, 10, seal ring, 31, disk, 32, the stable base station of installing, 320, pilot hole.
Embodiment
following specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the modification that there is no creative contribution as required after reading this specification, but as long as all are subject to the protection of Patent Law in claim scope of the present invention.
Claims (5)
1. a direct-connected low-temperature centrifugation pump structure, it is characterized in that: comprise motor (1), described motor (1) is equipped with pump shaft (2), described pump shaft (2) head is equipped with impeller (8), be provided with the intermediate support (5) passed for described pump shaft (2) between described motor (1) and impeller (8), be provided with the spiral case (9) that covers in described impeller (8) along described intermediate support (5), described motor (1) outside is provided with anti-splashing disk (3) around described pump shaft (2), described intermediate support (5) is equipped with the sealing seat (7) passed for described pump shaft (2) by impeller (8) one sides, described sealing seat (7) is provided with the lip seal (6) that acts on described pump shaft (2).
2. a kind of direct-connected low-temperature centrifugation pump structure according to claim 1, it is characterized in that: intermediate support (5) is provided with the nitrogen blowing joint (4) that acts on lip seal (6).
3. a kind of direct-connected low-temperature centrifugation pump structure according to claim 2 is characterized in that: lip seal (6) both sides are respectively equipped with and are installed on the seal ring (10) that pump shaft (2) were gone up and acted on to intermediate support (5) and sealing seat (7).
4. according to claim 1 or 2 or 3 described a kind of direct-connected low-temperature centrifugation pump structures, it is characterized in that: anti-splashing disk (3) comprise over against the disk (31) of the flat of intermediate support (5) with described disk (31) one, be connected by motor (1) one side for the fixing stable installation base station (32) of pump shaft (2).
5. a kind of direct-connected low-temperature centrifugation pump structure according to claim 4, is characterized in that: stablize installation base station (32) and be provided with the pilot hole (320) perpendicular to pump shaft (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104751876A CN103470513A (en) | 2013-10-13 | 2013-10-13 | Direct-connected low-temperature centrifugal pump structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104751876A CN103470513A (en) | 2013-10-13 | 2013-10-13 | Direct-connected low-temperature centrifugal pump structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103470513A true CN103470513A (en) | 2013-12-25 |
Family
ID=49795506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013104751876A Pending CN103470513A (en) | 2013-10-13 | 2013-10-13 | Direct-connected low-temperature centrifugal pump structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103470513A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026724A (en) * | 2018-08-13 | 2018-12-18 | 苏州横海信息科技有限公司 | A kind of low temperature LNG centrifugal pump |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1073064A (en) * | 1965-05-14 | 1967-06-21 | Stothert & Pitt Ltd | Centrifugal pump units |
| US20050152780A1 (en) * | 2004-01-13 | 2005-07-14 | Itt Manufacturing Enterprises, Inc. | Double motor seal for a close coupled centrifugal pump |
| JP2005351109A (en) * | 2004-06-08 | 2005-12-22 | Ebara Corp | Pump device |
| CN202250884U (en) * | 2011-09-08 | 2012-05-30 | 大连深蓝泵业有限公司 | Vertical multilevel low-temperature liquid oxygen and liquid nitrogen pump |
| CN202690462U (en) * | 2012-03-30 | 2013-01-23 | 大连四方佳特流体设备有限公司 | Upright directly-connected pipe low-temperature centrifugal pump |
| CN203175932U (en) * | 2013-02-18 | 2013-09-04 | 昆明嘉和科技股份有限公司 | Petrochemical engineering process pump |
| CN203516113U (en) * | 2013-10-13 | 2014-04-02 | 湖州三井低温设备有限公司 | Direct-connecting type low-temperature centrifugal pump structure |
-
2013
- 2013-10-13 CN CN2013104751876A patent/CN103470513A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1073064A (en) * | 1965-05-14 | 1967-06-21 | Stothert & Pitt Ltd | Centrifugal pump units |
| US20050152780A1 (en) * | 2004-01-13 | 2005-07-14 | Itt Manufacturing Enterprises, Inc. | Double motor seal for a close coupled centrifugal pump |
| JP2005351109A (en) * | 2004-06-08 | 2005-12-22 | Ebara Corp | Pump device |
| CN202250884U (en) * | 2011-09-08 | 2012-05-30 | 大连深蓝泵业有限公司 | Vertical multilevel low-temperature liquid oxygen and liquid nitrogen pump |
| CN202690462U (en) * | 2012-03-30 | 2013-01-23 | 大连四方佳特流体设备有限公司 | Upright directly-connected pipe low-temperature centrifugal pump |
| CN203175932U (en) * | 2013-02-18 | 2013-09-04 | 昆明嘉和科技股份有限公司 | Petrochemical engineering process pump |
| CN203516113U (en) * | 2013-10-13 | 2014-04-02 | 湖州三井低温设备有限公司 | Direct-connecting type low-temperature centrifugal pump structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026724A (en) * | 2018-08-13 | 2018-12-18 | 苏州横海信息科技有限公司 | A kind of low temperature LNG centrifugal pump |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131225 |