CN103573644A - Low-temperature barrel bag pump mechanical sealing protecting device - Google Patents

Low-temperature barrel bag pump mechanical sealing protecting device Download PDF

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Publication number
CN103573644A
CN103573644A CN201310575401.5A CN201310575401A CN103573644A CN 103573644 A CN103573644 A CN 103573644A CN 201310575401 A CN201310575401 A CN 201310575401A CN 103573644 A CN103573644 A CN 103573644A
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CN
China
Prior art keywords
box
lining
casing
buffering
pump shaft
Prior art date
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Granted
Application number
CN201310575401.5A
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Chinese (zh)
Other versions
CN103573644B (en
Inventor
许文超
刘磊
刘艳辉
郑全年
苏晓慧
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
Original Assignee
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 CN201310575401.5A priority Critical patent/CN103573644B/en
Publication of CN103573644A publication Critical patent/CN103573644A/en
Application granted granted Critical
Publication of CN103573644B publication Critical patent/CN103573644B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention discloses a low-temperature barrel bag pump mechanical sealing protecting device which comprises a pump shaft, an impeller, a barrel bag, an inlet section, an outlet section, mechanical seal, and a balancing mechanism. A liquid vaporization and temperature-increasing channel is additionally arranged on the pump shaft between the balancing mechanism and the mechanical seal. According to the channel, a buffering box body is arranged above a balancing box body of the balancing mechanism, a shaft sleeve and a lower lining are sleeved with the buffering box body from top to bottom along the pump shaft, the lower lining is fixedly connected with the upper top face of the balancing box body, and an axial channel between the buffering box body and the balancing box body is blocked. A sealing box body is arranged above the buffering box body, a separation ring and an upper lining are sleeved with the sealing box body from top to bottom along the pump shaft, the upper lining is fixedly connected with the upper top face of the buffering box body, and an axial channel between the sealing box body and the buffering box body is blocked. The low-temperature barrel bag pump mechanical sealing protecting device has the advantages of being simple in structure, reliable and safe in operation, long in service life, capable of achieving continuous working of pump equipment in a low-temperature working condition, and is high in working efficiency.

Description

Low temperature barrel bag pump mechanical seal protective gear
technical fieldthe present invention relates to a kind of low temperature liquid medium transport pump, especially a kind of low temperature barrel bag pump mechanical seal protective gear that is applicable to carry the low temperature liquid media such as-80 ℃~-120 ℃ ethene, propylene, methane, ethane.
background techniqueaccording to the physical principle of expanding with heat and contract with cold, be used at present the mechanical seal structure that transporting low temperature ethylene, methane etc. easily use in the vertical type multilevel barrel bag pump of vaporization liquid medium, exist in low temperature and high-pressure work environment lower seal gap amplify, the problem of mechanical seal damage parts, cause mechanical seal shortening in working life, easily cause because mechanical seal part failure makes inflammable and explosive medium and leak, the pumping unit safety in production utmost point is caused large impact and increases the problems such as operating cost.
summary of the inventionthe object of the present invention is to provide and a kind ofly can realize low temperature barrel bag pump mechanical seal protective gear safe and reliable to operation.
For achieving the above object, low temperature barrel bag pump mechanical seal protective gear of the present invention comprises pump shaft, impeller, cylinder bag, imports and exports section, mechanical seal, balanced controls, vaporizing liquid and intensification passage wherein on the pump shaft between balanced controls and mechanical seal, have been set up, this passage for arranging buffering casing above the balance box of balanced controls, buffering is socketed with axle sleeve and lower lining from top to bottom along pump shaft in casing, wherein descend on lining and balance box the affixed and obstruct of end face to cushion the axial passage between casing and balance box; In buffering, seal case is set above casing, in seal case, along pump shaft, is socketed with spacer ring and upper lining from top to bottom, wherein go up lining and cushion on casing the affixed and obstruction seals casing of end face and cushion the axial passage between casing.
Adopt after said structure, according to the physical property of easy gasifying liquid, after the extruding of too small gap, flow to large space because of volumetric expansion, and the double factor that applies centrifugal force makes it vaporization, and improve temperature and reduce pressure.Therefore the low temperature liquid medium being full of in balance box, enters in buffering casing and the vapour-liquid of portion's formation within it two-phase state by the radial clearance between axle sleeve and lower lining, so temperature rising pressure drop.Medium continues to stop by radial clearance and the end face of spacer ring and upper lining, enters in the formed buffer cavity of seal case, thereby further vaporized and heat up.Thereby guaranteed that the temperature and pressure of mechanical seal place is in normal trend of work.
Feature of the present invention is: simple in structure, safe and reliable to operation, long service life, without on-the-spot special maintenance, can realize pumping unit continuous operation under worst cold case, operation and maintenance expenses are low.
accompanying drawing explanationfig. 1 is low temperature barrel bag pump mechanical seal protective gear overall structure schematic diagram of the present invention.
embodimentbelow in conjunction with accompanying drawing, the present invention is described in further detail:
As shown in Figure 1, low temperature barrel bag pump mechanical seal protective gear of the present invention comprises pump shaft 16, impeller 15, cylinder bag 13, imports and exports section 12, mechanical seal 3, balanced controls 11, vaporizing liquid and intensification passage wherein on the pump shaft 16 between balanced controls 11 and mechanical seal, have been installed in addition with, this passage for being provided with buffering casing 7 above the balance box 10 of balanced controls, buffering is socketed with axle sleeve 8 and lower lining 9 from top to bottom along pump shaft in casing, wherein descend on lining and balance box the affixed and obstruct of end face to cushion the axial passage between casing and balance box; In buffering, seal case 4 is set above casing, in seal case, along pump shaft, is socketed with spacer ring 5 and upper lining 6 from top to bottom, wherein go up lining and cushion on casing the affixed and obstruction seals casing of end face and cushion the axial passage between casing.
In pumping unit running; coupling 1 provides power to pump shaft 16; bearing part 2 plays the effect of support and fixed rotor; liquid enters in cylinder bag 13 by importing and exporting the suction pipe introducing liquid of the right-hand member of section 12; after liquid being pressurizeed step by step through the impeller 15 in stage casing 14; from importing and exporting the pipeline of section left end, discharge, mechanical seal 3 is used for blocking high-pressure liquid, with balanced controls 11, reduces axial forces protection bearings.Cryogenic high pressure liquid is by flowing out and enter in balance box 10 from balanced controls 11, and the radial clearance that continues to make progress by axle sleeve 8 and lower lining 9 enters in buffering casing 7, and portion forms vapour-liquid two-phase state within it, so temperature rising pressure drop.Medium continues to stop by radial clearance and the end face of spacer ring 5 and upper lining 6, enters in the formed buffer cavity of seal case 4, is further vaporized and heats up.Guarantee that the temperature and pressure at mechanical seal 3 places, in normal working, improves the working life of mechanical seal significantly.
Feature of the present invention is: simple in structure, reliable safety, long service life, without on-the-spot special maintenance, can realize pumping unit continuous operation under worst cold case, and operation and maintenance expenses are low.

Claims (1)

1. a low temperature barrel bag pump mechanical seal protective gear, comprise pump shaft, impeller, cylinder bag, import and export section, mechanical seal, balanced controls, it is characterized in that: on the pump shaft between balanced controls and mechanical seal, set up vaporizing liquid and intensification passage, this passage for arranging buffering casing above the balance box of balanced controls, buffering is socketed with axle sleeve and lower lining from top to bottom along pump shaft in casing, wherein descend on lining and balance box the affixed and obstruct of end face to cushion the axial passage between casing and balance box; In buffering, seal case is set above casing, in seal case, along pump shaft, is socketed with spacer ring and upper lining from top to bottom, wherein go up lining and cushion on casing the affixed and obstruction seals casing of end face and cushion the axial passage between casing.
CN201310575401.5A 2013-11-18 2013-11-18 Low-temperature barrel bag pump mechanical seal protective gear Active CN103573644B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310575401.5A CN103573644B (en) 2013-11-18 2013-11-18 Low-temperature barrel bag pump mechanical seal protective gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310575401.5A CN103573644B (en) 2013-11-18 2013-11-18 Low-temperature barrel bag pump mechanical seal protective gear

Publications (2)

Publication Number Publication Date
CN103573644A true CN103573644A (en) 2014-02-12
CN103573644B CN103573644B (en) 2015-12-30

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Family Applications (1)

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CN201310575401.5A Active CN103573644B (en) 2013-11-18 2013-11-18 Low-temperature barrel bag pump mechanical seal protective gear

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104514723B (en) * 2015-01-08 2016-08-17 大连深蓝泵业有限公司 Marine vertical deep-well liquid pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002013645A (en) * 2000-06-29 2002-01-18 Nippon Pillar Packing Co Ltd Shaft seal device for liquefied gas
CN201100267Y (en) * 2007-10-22 2008-08-13 佛山市顺德区顺达船舶工程有限公司 A pump axis sealing device
CN201297274Y (en) * 2008-11-06 2009-08-26 陈潜 Forced circulation mechanical seal structure with shaft sleeve
CN103267021A (en) * 2013-03-29 2013-08-28 大连罗斯泵业有限公司 Horizontal type self-priming pump
CN203532312U (en) * 2013-11-18 2014-04-09 大连深蓝泵业有限公司 Mechanical seal protection device for low-temperature barrel pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002013645A (en) * 2000-06-29 2002-01-18 Nippon Pillar Packing Co Ltd Shaft seal device for liquefied gas
CN201100267Y (en) * 2007-10-22 2008-08-13 佛山市顺德区顺达船舶工程有限公司 A pump axis sealing device
CN201297274Y (en) * 2008-11-06 2009-08-26 陈潜 Forced circulation mechanical seal structure with shaft sleeve
CN103267021A (en) * 2013-03-29 2013-08-28 大连罗斯泵业有限公司 Horizontal type self-priming pump
CN203532312U (en) * 2013-11-18 2014-04-09 大连深蓝泵业有限公司 Mechanical seal protection device for low-temperature barrel pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104514723B (en) * 2015-01-08 2016-08-17 大连深蓝泵业有限公司 Marine vertical deep-well liquid pump

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