CN104514723B - Marine vertical deep-well liquid pump - Google Patents

Marine vertical deep-well liquid pump Download PDF

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Publication number
CN104514723B
CN104514723B CN201510007842.4A CN201510007842A CN104514723B CN 104514723 B CN104514723 B CN 104514723B CN 201510007842 A CN201510007842 A CN 201510007842A CN 104514723 B CN104514723 B CN 104514723B
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CN
China
Prior art keywords
pump
stay tube
axle
assembly
outlet section
Prior art date
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Application number
CN201510007842.4A
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Chinese (zh)
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CN104514723A (en
Inventor
许文超
张川
金兴基
刘艳辉
王成龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dalian Deep Blue Pump Co Ltd
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Dalian Deep Blue Pump Co Ltd
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Publication date
Application filed by Dalian Deep Blue Pump Co Ltd filed Critical Dalian Deep Blue Pump Co Ltd
Priority to CN201510007842.4A priority Critical patent/CN104514723B/en
Publication of CN104514723A publication Critical patent/CN104514723A/en
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Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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

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  • 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 open a kind of marine vertical deep-well liquid pump of the present invention, including electric machine assembly, parts of bearings, mechanical seal, outlet section, a stay tube, intermediate support beam, axle, spindle assembly, multilevel deflector shell and impeller, inducer, suction casing etc.；Gaseous state is set gradually from top to bottom every cold chamber and cushion chamber, composition twice mechanical seal protective barrier between mechanical seal and outlet section；Between pump rotor and housing, arrange multiple spot sliding bearing support, realizing middle limiting assembly is set in the middle of pump, bottom limit assembly is set in pump bottom, it is to avoid make pump overall offset owing to rocking；The stay tube of can slide up and down is set at lower axle spindle, utilizes the space vacateed to pull down spindle parts, and then take out whole lower shaft section and keep in repair.The present invention can improve sealing life, prevent pump from rocking, convenient disassembly, stable, safe and reliable under length 20 meters, 165 DEG C of operating modes of operating temperature under pump liquid, service life is long, it is adaptable to the conveying of LNG, LEG, LPG.

Description

Marine vertical deep-well liquid pump
Technical field
The present invention relates to a kind of liquid pump peculiar to vessel, particularly relate to one and be applicable to carry LNG, LEG, LPG(Liquid Natural Gas, Liquid Ethylene Gas, Liquid Petrol Gas) marine vertical deep-well liquid pump.
Background technology
At present, common MODEL VERTICAL MULTISTAGE PUMP cannot meet the special operation condition requirement of LNG, LEG, LPG tanker unloading, it is primarily present problems with: for meeting the unloading of storage tank, the insertion depth of liquid pump peculiar to vessel requires the longest, and hull can occur necessarily to wave in Discharging Process, in hull rocking process, there is bigger radial displacement in the internal branch of the tank of pump, and producing certain acceleration, this easily causes rotor wear ring and the collision of housing wear ring and eccentric wear, affects the even running of pump；The medium minimum temperature of conveying is-165 DEG C, and medium directly contacts with potted component, will cause the inefficacy of potted component, occurs medium to reveal, the safe operation of tanker is stayed potential safety hazard；The overall length of pump is long, is safeguarding and in maintenance process, as changed the parts such as wear ring, impeller, needs pump entirety to sling, extremely inconvenience.
Summary of the invention
For above-mentioned existing problems, it is an object of the invention 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 service life, anti-shake, convenient disassembly, stable, safe and reliable.
nullThe purpose of the present invention is realized by following technical proposals: a kind of marine vertical deep-well liquid pump，Including electric machine assembly、The parts of bearings being sequentially arranged on axle、Mechanical seal、Outlet section、Multilevel deflector shell、Multi-stage impeller、Inducer、Suction casing，Its axis includes upper shaft、Lower axle、Jackshaft，Each axle is connected by spindle assembly，It is provided with more piece between outlet section lower end and final stage blower inlet casing upper end and props up stay tube，It is provided with intermediate support beam between axle and a stay tube，Described mechanical seal makes outlet section upwardly extend with exporting an intersegmental piece housing of setting up，Gaseous state is set gradually from top to bottom every cold chamber and cushion chamber in described housing，Low temperature liquid medium is made directly not contact with mechanical seal，Return port is set on the housing below cushion chamber and connects liquid goods tank top，Between outlet section and cushion chamber、Between outlet section and a stay tube、Between two joint stay tubes、Before and after every grade of impeller and pump lowermost end is respectively provided with sliding bearing and is supported on axle；Realizing middle limiting assembly is set in the middle of pump, bottom limit assembly is set in pump bottom；The spindle assembly of lower axle is arranged in a stay tube A of bottom, and a stay tube A is sleeved on the stay tube B that its upper end is neighbouring and can slide up and down along a stay tube B, and a stay tube A sets gradually downwards every grade of blower inlet casing and impeller.
Described gaseous state is provided with the baffle set that its surrounding is the brim of a hat shape in the housing above cold chamber, in case cryogenic media impacts directly up and damages mechanical seal.
Described sliding bearing is made up of with axle sleeve axle bush, is matched in clearance between axle bush and axle sleeve.
Described realizing middle limiting assembly is that propping up in the middle of pump arranges guide ring between stay tube and base connection, and guide ring outer ring uses matched in clearance with base connection inner ring；Described bottom limit assembly is to arrange spacing between the blower inlet casing outer ring and base connection inner ring of pump bottom, and blower inlet casing outer ring and base connection inner ring use matched in clearance.
The present invention uses mechanical seal blocking high-pressure medium to leak outside, gaseous state is set between mechanical seal and outlet section every cold chamber and cushion chamber, low temperature liquid medium is made directly not contact with mechanical seal, ensure that potted component does not occur low temperature to lose efficacy, thus ensure that medium does not occur to reveal and the safe operation of tanker.
Arrange multiple spot sliding bearing between pump case of the present invention and rotor to support, sliding bearing is made up of with axle sleeve axle bush, wherein axle bush is selected and is had high intensity, low temperature resistant, the material of high-wearing feature, axle sleeve uses matched in clearance with axle bush, liquid film is formed at minim gap betwixt, whole rotor is played rigid support effect, it is ensured that the rotor of pump operates stable under waving operating mode.
The present invention arranges limited support between housing and basis, it is ensured that the housing of pump will not occur bigger radial displacement in waving of tanker under operating mode, it is to avoid produces excessive impact stress, is further ensured that the pump steady operating under waving operating mode.
Another of the present invention is structurally characterized in that lower axle spindle position is arranged in a stay tube of bottom, the pipe box that supports of bottom is contained on the stay tube that its upper end is neighbouring, safeguard and in maintenance process at pump, can realize being not required to lift by crane the parts such as the most replaceable impeller of whole pump and wear ring, facilitate maintenance and the maintenance of pump.
The present invention under pump liquid a length of 20 meters, operating temperature is for having the features such as stable, safe and reliable, length in service life under-165 DEG C of operating modes, it is adaptable 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 that the gaseous state of the present invention is every cold chamber and the partial enlarged drawing of cushion chamber.
Fig. 3 is the partial enlarged drawing of the realizing middle limiting assembly of the present invention.
Fig. 4 is the partial enlarged drawing of the bottom limit assembly of the present invention.
Fig. 5 is the partial enlarged drawing of supporting tube structure at the lower axle spindle of the present invention.
Detailed description of the invention
Hereinafter, with reference to the accompanying drawings of embodiments of the invention.
As it is shown in figure 1, the marine vertical deep-well liquid pump of the embodiment of the present invention by electric machine assembly 1, parts of bearings 2, mechanical seal 3, gaseous state every cold chamber 4, cushion chamber 5, outlet section 6, stay 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 form.Gaseous state is set gradually from top to bottom every cold chamber 4 and cushion chamber 5 between mechanical seal 3 and outlet section 6；Between outlet section 6 and cushion chamber 5, between outlet section 6 and a stay tube 7, two joints prop up between stay tubes 7, every grade of impeller 13 front and back position, pump lowermost end are respectively provided with sliding bearing and are supported on axle；Realizing middle limiting assembly 9 is set in the middle of pump, bottom limit assembly 16 is set in pump bottom；Lower axle spindle assembly 11 is arranged in a stay tube of bottom, and the pipe box that supports of bottom is contained on the stay tube that its upper end is neighbouring, and a stay tube for bottom sets gradually downwards every grade of blower inlet casing 12 and impeller 13.
nullAs shown in Figure 2，The present invention sets up a piece housing between mechanical seal 3 and outlet section 6 makes outlet section 6 upwardly extend，Gaseous state is set gradually from top to bottom every cold chamber 4 and cushion chamber 5 in housing，Thus form the protective barrier of the mechanical seal 3 of twice different structure，Return port is set on the housing below cushion chamber 5 and connects liquid goods tank 20 top，Axle between cushion chamber 5 and outlet section 6 is provided with the sliding bearing being made up of axle sleeve 19 and axle bush 18，Axle sleeve 19 and axle bush 18 are because of matched in clearance formation slight radial clearance，Play pressure release effect，Ensure cushion chamber 5 pressure,Cushion chamber 5 and gaseous state every cold chamber 4 because matched in clearance forms small gap and is arranged over, at gaseous state, the baffle set 17 that surrounding is the brim of a hat shape every cold chamber 4，Low temperature liquid medium is made directly not contact with mechanical seal 3，Ensure that potted component does not occur low temperature to lose 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, and it is spacing that guide ring 22 is set between pump intermediate supports pipe 7 and base connection 21, the outer ring of guide ring 22 forms less radial clearance with the inner ring of base connection 21 because of matched in clearance；As shown in Figure 4, arranging spacing between blower inlet casing 12 outer ring, pump bottom and base connection 21, blower inlet casing 12 outer ring and base connection 21 inner ring form less radial clearance because of matched in clearance；At two, radial clearance all plays radially position-limiting action, it is ensured that the housing of pump will not occur bigger radial displacement in waving of tanker under operating mode, it is to avoid produces excessive impact stress.
Without slinging from upper entirety when the present invention realizes keeping in repair, but by bottom, consumable accessory entirety is removed.As shown in Figure 5, lower axle 26 is arranged in a stay tube 25 of bottom with the spindle assembly 11 of jackshaft 23, the stay tube 25 that can slide up and down of bottom is sleeved on the stay tube 24 that its upper end is neighbouring, safeguard and in maintenance process at pump, can will prop up between stay tube 25 and final stage blower inlet casing 12, the bolt propped up between stay tube 25 and a stay tube 24 is all backed out, stay tube 25 upward sliding will be propped up, the space vacateed is utilized to pull down spindle assembly 11, and take out whole lower shaft section further, realization is not required to lift by crane the parts such as the most replaceable impeller of whole pump 13 and wear ring 27, facilitate maintenance and the maintenance of pump.

Claims (4)

  1. null1. a marine vertical deep-well liquid pump，Including electric machine assembly、The parts of bearings being sequentially arranged on axle、Mechanical seal、Outlet section、Multilevel deflector shell、Multi-stage impeller、Inducer、Suction casing，Its axis includes upper shaft、Lower axle、Jackshaft，Each axle is connected by spindle assembly，It is provided with more piece between outlet section lower end and final stage blower inlet casing upper end and props up stay tube，It is provided with intermediate support beam between axle and a stay tube，It is characterized in that，Described mechanical seal makes outlet section upwardly extend with exporting an intersegmental piece housing of setting up，Gaseous state is set gradually from top to bottom every cold chamber and cushion chamber in described housing，Low temperature liquid medium is made directly not contact with mechanical seal，Return port is set on the housing below cushion chamber and connects liquid goods tank top，Between outlet section and cushion chamber、Between outlet section and a stay tube、Between two joint stay tubes、Before and after every grade of impeller and pump lowermost end is respectively provided with sliding bearing and is supported on axle；Realizing middle limiting assembly is set in the middle of pump, bottom limit assembly is set in pump bottom；Lower axle spindle assembly is arranged in a stay tube A of bottom, and a stay tube A is sleeved on the stay tube B that its upper end is neighbouring and can slide up and down along a stay tube B, and a stay tube A sets gradually downwards every grade of blower inlet casing and impeller.
  2. Marine vertical deep-well liquid pump the most according to claim 1, it is characterised in that described gaseous state is provided with the baffle set that its surrounding is the brim of a hat shape in the housing above cold chamber.
  3. Marine vertical deep-well liquid pump the most according to claim 1, it is characterised in that described sliding bearing is made up of with axle sleeve axle bush, is matched in clearance between axle bush and axle sleeve, and wherein axle bush selection has high intensity, material low temperature resistant, high-wearing feature is made.
  4. Marine vertical deep-well liquid pump the most according to claim 1, it is characterised in that described realizing middle limiting assembly is that propping up in the middle of pump arranges guide ring between stay tube and base connection, and guide ring outer ring uses matched in clearance with base connection inner ring；Described bottom limit assembly is to arrange spacing between the blower inlet casing outer ring and base connection inner ring of pump bottom, and blower inlet casing outer ring and base connection inner ring use matched in clearance.
CN201510007842.4A 2015-01-08 2015-01-08 Marine vertical deep-well liquid pump Active CN104514723B (en)

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Application Number Priority Date Filing Date Title
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CN104514723B true CN104514723B (en) 2016-08-17

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Cited By (1)

* Cited by examiner, † Cited by third party
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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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
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
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
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
CN112833190B (en) * 2020-12-28 2022-07-19 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

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GB1289442A (en) * 1970-03-06 1972-09-20
CN2340954Y (en) * 1998-04-28 1999-09-29 大连深蓝泵业有限公司 Underwater pump with long shaft
CN102062107A (en) * 2010-12-13 2011-05-18 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
CN103573644A (en) * 2013-11-18 2014-02-12 大连深蓝泵业有限公司 Low-temperature barrel bag pump mechanical sealing protecting device
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
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

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1289442A (en) * 1970-03-06 1972-09-20
CN2340954Y (en) * 1998-04-28 1999-09-29 大连深蓝泵业有限公司 Underwater pump with long shaft
CN102062107A (en) * 2010-12-13 2011-05-18 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
CN103573644A (en) * 2013-11-18 2014-02-12 大连深蓝泵业有限公司 Low-temperature barrel bag pump mechanical sealing protecting device
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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