CN104514723A - Marine vertical deep well liquid cargo pump - Google Patents
Marine vertical deep well liquid cargo pump Download PDFInfo
- Publication number
- CN104514723A CN104514723A CN201510007842.4A CN201510007842A CN104514723A CN 104514723 A CN104514723 A CN 104514723A CN 201510007842 A CN201510007842 A CN 201510007842A CN 104514723 A CN104514723 A CN 104514723A
- Authority
- CN
- China
- Prior art keywords
- pump
- support tube
- axle
- outlet section
- mechanical seal
- 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.)
- Granted
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/5893—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a marine vertical deep well liquid cargo pump which comprises a motor component, a bearing component, a mechanical seal, an exit section, a support pipe, a middle support frame, a shaft, a shaft connecting component, a multistage flow guide housing, an impeller, an inducer, a suction section and the like, wherein a gaseous cold insulation cavity and a buffer cavity are sequentially arranged between the mechanical seal and the exit section from the top down to form two mechanical seal protection barriers; a multipoint sliding bearing support is arranged between a pump rotor and a casing; a middle limiting component is arranged in the middle of the pump; a bottom end limiting component is arranged at the undermost end of the pump; deviation of the whole pump due to swaying is avoided; the support pipe capable of sliding up and down is arranged at a shaft connecting part of a lower shaft; the shaft connecting component is dismounted by using a vacated space; and further, a whole lower shaft component can be taken out for maintenance. According to the pump, the service life of the seal can be prolonged, the swaying of the pump is avoided, the pump is convenient to dismount, as well as operates stably and is safe and reliable and long in service life under the working condition of length being 20m and working temperature being subzero 165 DEG C when liquid is pumped, and the pump is applicable to conveying LNG (Liquefied Natural Gas), LEG (Liquid Ethylene Gas) and LPG (Liquefied Petroleum Gas).
Description
Technical field
The present invention relates to a kind of liquid pump peculiar to vessel, particularly relate to one and be applicable to conveying LNG, LEG, LPG(Liquid Natural Gas, Liquid Ethylene Gas, Liquid Petrol Gas) marine vertical deep-well liquid pump.
Background technique
At present, common MODEL VERTICAL MULTISTAGE PUMP cannot meet the special operation condition requirement of LNG, LEG, LPG tanker unloading, mainly there is following problem: for meeting the unloading of storage tank, the insertion depth of liquid pump peculiar to vessel requires extremely long, and hull can occur necessarily to wave in Discharging Process, in hull rocking process, there is larger radial displacement in the inner branch of tank of pump, and producing certain acceleration, this very easily causes collision and the eccentric wear of rotor wear ring and housing wear ring, affects the smooth running of pump; The medium minimum temperature of conveying is-165 DEG C, and medium directly contacts with seal element, will cause the inefficacy of seal element, medium occurs and reveals, leave potential safety hazard to the safe operation of tanker; The overall length of pump is long, in maintenance and maintenance process, as changed the parts such as wear ring, impeller, needs pump entirety to sling, very inconvenience.
Summary of the invention
For above-mentioned existing problems, the object of this invention is to provide the marine vertical deep-well liquid pump of a kind of applicable conveying LNG, LEG, LPG, this pump can ensure to improve mechanical seal working life, anti-shake, convenient disassembly, stable, safe and reliable.
Object of the present invention is realized by following technical proposals: a kind of marine vertical deep-well liquid pump, comprise electric machine assembly, be arranged in the bearing part on axle successively, mechanical seal, outlet section, multilevel deflector shell, multi-stage impeller, inducer, suction casing, its axis comprises axle, lower shaft, jack shaft, each axle is connected by spindle assembly, more piece support tube is provided with between outlet section lower end and final stage blower inlet casing upper end, intermediate support beam is provided with between axle and support tube, setting up a piece housing between described mechanical seal and outlet section makes outlet section upwards extend, gaseous state is set gradually from top to bottom every cold chamber and buffer cavity in described housing, low temperature liquid medium is not directly contacted with mechanical seal, housing below buffer cavity is arranged return port connecting fluid goods tank top, between outlet section and buffer cavity, between outlet section and support tube, between two joint support tubes, before and after every grade of impeller and pump lowermost end sliding bearing be all set be supported on axle, realizing middle limiting assembly is set in the middle of pump, bottom limit assembly is set bottom at pump, the spindle assembly of lower shaft is arranged in support tube A bottom, and support tube A is set with on support tube B contiguous at its upper end and can slides up and down along support tube B, and support tube A sets gradually every grade of blower inlet casing and impeller downwards.
Described gaseous state is provided with the baffle cover that its surrounding is the brim of a hat shape in the housing above cold chamber, in case cryogenic media damages mechanical seal directly to upper impact.
Described sliding bearing is made up of axle bush and axle sleeve, is Spielpassung between axle bush and axle sleeve.
Described realizing middle limiting assembly arranges guide ring between the middle support tube of pump and base connection, and guide ring outer ring and base connection inner ring adopt Spielpassung; Described bottom limit assembly arranges spacing between pump blower inlet casing outer ring bottom and base connection inner ring, and blower inlet casing outer ring and base connection inner ring adopt Spielpassung.
The present invention adopts mechanical seal blocking high-pressure medium to leak outside, gaseous state is set between mechanical seal and outlet section every cold chamber and buffer cavity, low temperature liquid medium is not directly contacted with mechanical seal, ensure that seal element low temperature does not occur and lost efficacy, thus ensure that the safe operation of leakage and tanker does not occur medium.
Arrange multiple spot sliding bearing between pump case of the present invention and rotor to support, sliding bearing is made up of axle bush and axle sleeve, wherein axle bush selects the material with high strength, low temperature resistant, high wear resistance, axle sleeve and axle bush adopt Spielpassung, micro-gap place betwixt forms liquid film, rigid support effect is played to whole rotor, ensures that the rotor of pump is to wave under operating mode running stable.
The present invention arranges limited support between housing and basis, ensure the housing of pump tanker wave operating mode under can not there is larger radial displacement, avoid producing excessive impact stress, ensure that pump is waving the smooth operation under operating mode further.
Another structural feature of the present invention is that lower shaft spindle position is arranged in support tube bottom, on the support tube that support tube suit is bottom contiguous at its upper end, in pump maintenance and maintenance process, can realize not needing to lift by crane whole pump and the part such as replaceable impeller and wear ring, facilitate maintenance and the maintenance of pump.
The present invention's length under pump liquid is 20 meters, operating temperature for having the features such as stable, safe and reliable, long service life under-165 DEG C of operating modes, be applicable to the conveying of LNG, LEG, LPG medium.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is gaseous state of the present invention every the partial enlarged drawing of cold chamber and buffer cavity.
Fig. 3 is the partial enlarged drawing of realizing middle limiting assembly of the present invention.
Fig. 4 is the partial enlarged drawing of bottom of the present invention limit assembly.
Fig. 5 is the partial enlarged drawing of lower shaft spindle place of the present invention supporting tube structure.
Embodiment
hereinafter, with reference to the accompanying drawings of embodiments of the invention.
As shown in Figure 1, the marine vertical deep-well liquid pump of the embodiment of the present invention is made up of every cold chamber 4, buffer cavity 5, outlet section 6, support tube 7, intermediate support beam 8, axle 10, spindle assembly 11, realizing middle limiting assembly 9, bottom limit assembly 16, blower inlet casing 12, impeller 13, inducer 15, suction casing 14 electric machine assembly 1, bearing part 2, mechanical seal 3, gaseous state.Gaseous state is set gradually from top to bottom every cold chamber 4 and buffer cavity 5 between mechanical seal 3 and outlet section 6; Between outlet section 6 and buffer cavity 5, between outlet section 6 and support tube 7, two save between support tube 7, every grade of impeller 13 front and back position, pump lowermost end all arranges sliding bearing and is supported on axle; Realizing middle limiting assembly 9 is set in the middle of pump, bottom limit assembly 16 is set bottom at pump; Lower shaft spindle position 11 is arranged in support tube bottom, and on the support tube that support tube suit is bottom contiguous at its upper end, support tube bottom sets gradually every grade of blower inlet casing 12 and impeller 13 downwards.
As shown in Figure 2, the present invention sets up a piece housing between mechanical seal 3 and outlet section 6 makes outlet section 6 upwards extend, gaseous state is set gradually from top to bottom every cold chamber 3 and buffer cavity 4 in housing, thus form the protective barrier of the mechanical seal 3 of twice different structure, housing below buffer cavity 5 is arranged return port connecting fluid goods tank 20 top, axle between buffer cavity 4 and outlet section 6 is provided with the sliding bearing be made up of axle sleeve 19 and axle bush 18, axle sleeve 19 and axle bush 18 are because of Spielpassung formation slight radial clearance, play pressure release effect, ensure buffer cavity 5 pressure, buffer cavity 5 and gaseous state to be formed compared with small―gap suture because of Spielpassung every cold chamber 4 and above cold chamber 4, are provided with surrounding at gaseous state is that the baffle of the brim of a hat shape overlaps 17, low temperature liquid medium is not directly contacted with mechanical seal 3, ensure that seal element low temperature does not occur and lost efficacy, medium is avoided to reveal.
As shown in Figure 3, the present invention is for avoiding this long-shaft pump owing to rocking, and make overall offset, between pump intermediate support pipe 7 and base connection 21, arrange guide ring 22 spacing, the outer ring of guide ring 22 and the inner ring of base connection 21 form less radial clearance because of Spielpassung; As shown in Figure 4, arrange spacing bottom at pump between blower inlet casing 12 outer ring and base connection 21, blower inlet casing 12 outer ring and base connection 21 inner ring form less radial clearance because of Spielpassung; Two place's radial clearances all play radial position-limiting action, ensure the housing of pump tanker wave operating mode under can not there is larger radial displacement, avoid producing excessive impact stress.
Without the need to slinging from upper entirety when the present invention realizes keeping in repair, but by bottom, easily damaged parts entirety is shifted out.As shown in Figure 5, lower shaft 26 is arranged in support tube 25 bottom with the spindle parts 11 of jack shaft 23, the support tube 25 that can slide up and down bottom is set with on support tube 24 contiguous at its upper end, in pump maintenance and maintenance process, can by between support tube 25 and final stage blower inlet casing 12, bolt between support tube 25 and support tube 24 is all backed out, by support tube 25 upward sliding, the space vacateed is utilized to pull down spindle parts 11, and take out whole lower shaft section further, realize not needing to lift by crane whole pump and the part such as replaceable impeller 13 and wear ring 27, facilitate maintenance and the maintenance of pump.
Claims (4)
1. a marine vertical deep-well liquid pump, comprise electric machine assembly, be arranged in the bearing part on axle successively, mechanical seal, outlet section, multilevel deflector shell, multi-stage impeller, inducer, suction casing, its axis comprises axle, lower shaft, jack shaft, each axle is connected by spindle assembly, more piece support tube is provided with between outlet section lower end and final stage blower inlet casing upper end, intermediate support beam is provided with between axle and support tube, it is characterized in that, setting up a piece housing between described mechanical seal and outlet section makes outlet section upwards extend, gaseous state is set gradually from top to bottom every cold chamber and buffer cavity in described housing, low temperature liquid medium is not directly contacted with mechanical seal, housing below buffer cavity is arranged return port connecting fluid goods tank top, between outlet section and buffer cavity, between outlet section and support tube, between two joint support tubes, before and after every grade of impeller and pump lowermost end sliding bearing be all set be supported on axle, realizing middle limiting assembly is set in the middle of pump, bottom limit assembly is set bottom at pump, lower shaft spindle assembly is arranged in support tube A bottom, and support tube A is set with on support tube B contiguous at its upper end and can slides up and down along support tube B, and support tube A sets gradually every grade of blower inlet casing and impeller downwards.
2. marine vertical deep-well liquid pump according to claim 1, is characterized in that, described gaseous state is provided with the baffle cover that its surrounding is the brim of a hat shape in the housing above cold chamber.
3. marine vertical deep-well liquid pump according to claim 1, it is characterized in that, described sliding bearing is made up of axle bush and axle sleeve, is Spielpassung between axle bush and axle sleeve, wherein axle bush select there is high strength, material that is low temperature resistant, high wear resistance is made.
4. marine vertical deep-well liquid pump according to claim 1, is characterized in that, described realizing middle limiting assembly arranges guide ring between the middle support tube of pump and base connection, and guide ring outer ring and base connection inner ring adopt Spielpassung; Described bottom limit assembly arranges spacing between pump blower inlet casing outer ring bottom and base connection inner ring, and blower inlet casing outer ring and base connection inner ring adopt Spielpassung.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510007842.4A CN104514723B (en) | 2015-01-08 | 2015-01-08 | Marine vertical deep-well liquid pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510007842.4A CN104514723B (en) | 2015-01-08 | 2015-01-08 | Marine vertical deep-well liquid pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104514723A true CN104514723A (en) | 2015-04-15 |
| CN104514723B CN104514723B (en) | 2016-08-17 |
Family
ID=52790481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510007842.4A Active CN104514723B (en) | 2015-01-08 | 2015-01-08 | Marine vertical deep-well liquid pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104514723B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386984A (en) * | 2015-12-14 | 2016-03-09 | 大连深蓝泵业有限公司 | Vertical-type low-temperature immersed pump used for ship |
| CN105782254A (en) * | 2016-04-18 | 2016-07-20 | 大连深蓝泵业有限公司 | Stable supporting structure of long shafting for seawater source heat pump |
| CN107355389A (en) * | 2017-08-18 | 2017-11-17 | 大连深蓝泵业有限公司 | Solar energy thermal-power-generating high-temperature long-shaft pump for liquid salts |
| CN108724060A (en) * | 2017-11-13 | 2018-11-02 | 江苏核电有限公司 | A kind of reactor coolant pump mechanical seal maintenance bearing and its application method |
| CN109441839A (en) * | 2018-12-13 | 2019-03-08 | 上海交通大学 | Vertical double-rotor long-shaft pump |
| CN110374889A (en) * | 2019-06-28 | 2019-10-25 | 武汉船用机械有限责任公司 | Deep-well ballast pump peculiar to vessel |
| CN112833190A (en) * | 2020-12-28 | 2021-05-25 | 东方电气集团东方汽轮机有限公司 | Rotary mechanical sealing system suitable for high-density and high-viscosity working medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605791A (en) * | 2017-10-16 | 2018-01-19 | 上海阿波罗机械股份有限公司 | The mixed-flow pump of LNG receiving stations |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2010582C3 (en) * | 1970-03-06 | 1975-07-17 | Halberg Maschinenbau Gmbh & Co, 6700 Ludwigshafen | Seal for the essentially vertically arranged drive shaft of a centrifugal pump built into a pressure vessel |
| CN2340954Y (en) * | 1998-04-28 | 1999-09-29 | 大连深蓝泵业有限公司 | Underwater pump with long shaft |
| CN102062107B (en) * | 2010-12-13 | 2012-08-29 | 甘肃银光聚银化工有限公司 | Multi-stage axial flow submerged pump with long shaft and method for conveying phosgene |
| CN103835987A (en) * | 2012-11-27 | 2014-06-04 | 天津世仓工业设备有限公司 | Low-temperature deep-well pump |
| CN103573644B (en) * | 2013-11-18 | 2015-12-30 | 大连深蓝泵业有限公司 | Low-temperature barrel bag pump mechanical seal protective gear |
| CN203906303U (en) * | 2014-06-24 | 2014-10-29 | 大连利欧华能泵业有限公司 | Multi-stage, vertical, efficient and anti-cavitation cryogenic pump |
| CN204402908U (en) * | 2015-01-08 | 2015-06-17 | 大连深蓝泵业有限公司 | Marine vertical deep-well liquid pump |
-
2015
- 2015-01-08 CN CN201510007842.4A patent/CN104514723B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386984A (en) * | 2015-12-14 | 2016-03-09 | 大连深蓝泵业有限公司 | Vertical-type low-temperature immersed pump used for ship |
| CN105782254A (en) * | 2016-04-18 | 2016-07-20 | 大连深蓝泵业有限公司 | Stable supporting structure of long shafting for seawater source heat pump |
| CN107355389A (en) * | 2017-08-18 | 2017-11-17 | 大连深蓝泵业有限公司 | Solar energy thermal-power-generating high-temperature long-shaft pump for liquid salts |
| CN107355389B (en) * | 2017-08-18 | 2024-01-09 | 大连深蓝泵业有限公司 | Solar thermal power generation high-temperature long-axis molten salt pump |
| CN108724060A (en) * | 2017-11-13 | 2018-11-02 | 江苏核电有限公司 | A kind of reactor coolant pump mechanical seal maintenance bearing and its application method |
| CN108724060B (en) * | 2017-11-13 | 2023-10-20 | 江苏核电有限公司 | Mechanical seal maintenance support for reactor coolant pump and application method of mechanical seal maintenance support |
| CN109441839A (en) * | 2018-12-13 | 2019-03-08 | 上海交通大学 | Vertical double-rotor long-shaft pump |
| CN110374889A (en) * | 2019-06-28 | 2019-10-25 | 武汉船用机械有限责任公司 | Deep-well ballast pump peculiar to vessel |
| CN110374889B (en) * | 2019-06-28 | 2021-06-15 | 武汉船用机械有限责任公司 | Deep well ballast pump for ship |
| CN112833190A (en) * | 2020-12-28 | 2021-05-25 | 东方电气集团东方汽轮机有限公司 | Rotary mechanical sealing system suitable for high-density and high-viscosity working medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104514723B (en) | 2016-08-17 |
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