US3795460A - Sealing apparatus for gas compressor - Google Patents

Sealing apparatus for gas compressor Download PDF

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Publication number
US3795460A
US3795460A US00205879A US3795460DA US3795460A US 3795460 A US3795460 A US 3795460A US 00205879 A US00205879 A US 00205879A US 3795460D A US3795460D A US 3795460DA US 3795460 A US3795460 A US 3795460A
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United States
Prior art keywords
gas
operating fluid
remainder
tank
chambers
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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.)
Expired - Lifetime
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US00205879A
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English (en)
Inventor
T Endo
S Sugimura
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.)
Mitsui Engineering and Shipbuilding Co Ltd
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Mitsui Engineering and Shipbuilding Co Ltd
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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
    • F04D29/10—Shaft sealings
    • F04D29/102—Shaft sealings especially adapted for elastic fluid pumps
    • F04D29/104—Shaft sealings especially adapted for elastic fluid pumps the sealing fluid being other than the working fluid or being the working fluid treated
    • 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
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F04D29/5826—Cooling at least part of the working fluid in a heat exchanger
    • F04D29/5833—Cooling at least part of the working fluid in a heat exchanger flow schemes and regulation thereto

Definitions

  • ABSTRACT Apparatus for sealing the rotor shaft of gas compressor by sealing liquid fed under pressure comprising buffer gas chambers for preventing the leakage of corrosive or noxious gas in the operating gas, noncorrosive and innoxious gas separated from the operating gas by condensation and evaporation being fed into the buffer gas chambers.
  • SEALING APIARATUS FOR GAS COMPRESSGR This invention relates to a gas compressor using buffer gas, and more particularly to sealing apparatus for such gas compressor.
  • the conventional rotary gas compressors are usually provided with equalizing gas chambers, sealing liquid chambers and atmospheric chambers which are arranged in juxtaposition along the axis of the rotor shaft for the purpose of sealing of the rotor shaft.
  • a buffer gas must be used for preventing of leakage of the operating fluid. That is, an innoxious buffer gas under pressure is introduced into a buffer gas chamber formed between each said equalizing chamber and rotor, thereby to prevent corrosion of sealing sleeve in each sealing liquid chamber or danger to the human body.
  • Such buffer gas in prior art, is supplied from the outside, which means that operational cost is increased.
  • An object of the present invention is to eliminate such disadvantage of the conventional apparatus.
  • saturation temperature of the corrosive or noxious gas and that of the principal constituent of operating fluid are different from each other.
  • operating fluid is cooled to separate the corrosive or noxious gases from the main constituent of operating fluid, and the non-corrosive and innoxious constituent of operating fluid is used as buffer gas.
  • FIG. 1 is a schematic illustration of a gas compressor employing'the sealing apparatus according to the present invention.
  • FIG. 2 is a schematic illustration of a gas compressor employing the another embodiment of the present invention.
  • FIG. 1 there is shown diagrammatically a gas "compressor, generally designated by reference numeral 1, which, as will be seen, in provided with a rotor 3 enclosed by a casing 2.
  • a gas "compressor” which, as will be seen, in provided with a rotor 3 enclosed by a casing 2.
  • Each of the shafts 3a, 3b of said rotor 3 is enclosed by a buffer gas chamber 4, equilizing gas chamber 5, sealing liquid chamber 6 and atmospheric chamber 7 which are arranged in side by side relation in that order toward the outer end of each shaft as shown, and these chambers are partitioned from each other with labyrinth packings 8 or partition walls 9.
  • sealing sleeves 10 In each of said sealing liquid chambers 6, are provided sealing sleeves 10, and sealing liquid is supplied to the chambers 6 through a sealing liq uid line 11. Drain pipes 12 and 13 are connected to each equalizing gas chamber and atmospheric chamber '7, respectively, so that the sealing liquid flows into these chambers 5 and 7 is discharged therefrom through drain
  • bleeder pipes 14 and an out let pipe 15 are connected to the casing 2 of the gas compressor 1, and heat exchangers or gas coolers l6 and 17 are provided in the pipes 14 and 15, respectively.
  • the bottoms of the gas coolers 16 and 17 are connected by pipes to condensate tanks 18 and 19, respectively.
  • the number of the gas coolers 16 and 17 and the condensate tanks 18 and 19 may be suitably selected in accordance with a desired quantity of buffer gas and other factors.
  • An end of a buffer gas pipe line 20 is connected to the top space in each of the condensate tanks 18 and 19, the other end of the pipe line 20 being connected to the buffer gas chambers 41 of gas compressor 1.
  • the operating fluid compressed by the compressor 1 is flown into the gas coolers 16, 17 through bleeder pipes 14 or outlet pipe 15, and a part of the operating fluid is condensed at the gas coolers.
  • the corrosive or noxious gas having higher saturation temperaturethanthat of the main constituent of the operating fluid is condensed and accumulated in the condensate tanks 18, 19. Therefore, the gas accumulated in the tanks 1% 19 is non-corrosive and innoxious, and the gas is supplied to the buffer gas chambers 4 through the buffer gas pipe line 20.
  • the operating fluid in the gas compressor is perfectly isolated from the chambers 5, 6 and 7.
  • Pressure in the buffer gas chamber 4 is relatively low because pressure in the chamber 21 adjacent thereto on the rotor side is kept at a relatively low level by means of labyrinth packing or other like means, so that buffer gas in the condensate tanks 18, 19 may be introduced directly into the buffer gas chamber 4.
  • FIG. 2 there is shown an another embodiment which is suited for the case where the innoxious gases or non-corrosive gases contained in the operating fluid have easily condensable disposition.
  • same reference numerals are used to denote same parts as in the arrangement of FIG. 1, and no explanation is repeated here for these parts.
  • the differences of this embodiment from that of FIG. 1 are that an end of the buffer gas pipe line 26 is connected not to the top space in each of the condensate tanks 18, 19, but to a lower part thereof, and that an evaporator 22 is incorporated in the line 29.
  • the innoxious or noncorrosive gas in the operating fluid is reevaporated in the evaporator 22 to utilize it as buffer gas.
  • a heat exchanger for the operating fluid flowing through said rotor means to extract a portion of the operating fluid from said heat exchanger including a tank for containing the extracted fluid, said tank comprising means for separating corrosive or noxious components of the extracted operating fluid from the remainder, and means for directing at least a portion of said remainder into said buffer gas chambers in gaseous form whereby said buffer gaschambers are supplied with a gas which is free from corrosive or noxious components which may adversely affect said bearing portions and is composed only of the remainder of the operating fluid which does not contaminate said operating fluid.

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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)
  • Compressor (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
US00205879A 1970-12-16 1971-12-08 Sealing apparatus for gas compressor Expired - Lifetime US3795460A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45112108A JPS4929221B1 (enrdf_load_stackoverflow) 1970-12-16 1970-12-16

Publications (1)

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US3795460A true US3795460A (en) 1974-03-05

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US00205879A Expired - Lifetime US3795460A (en) 1970-12-16 1971-12-08 Sealing apparatus for gas compressor

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US (1) US3795460A (enrdf_load_stackoverflow)
JP (1) JPS4929221B1 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909012A (en) * 1973-03-14 1975-09-30 Technip Cie Gas sealing assembly
US4522024A (en) * 1981-09-18 1985-06-11 Bbc Brown, Boveri & Company, Limited Method for reducing the amount of nox and for raising the output of a gas turbine power station of the type utilizing an air reservoir, and a gas turbine power station, of this type, operating in accordance with this method
US4587076A (en) * 1981-05-21 1986-05-06 Framatome & Cie Sealing device for the drive shaft of a high pressure fluid pump
WO2010118977A1 (de) 2009-04-16 2010-10-21 Siemens Aktiengesellschaft Mehrstufiger turboverdichter
US20120098206A1 (en) * 2010-10-22 2012-04-26 Kabushiki Kaisha Toshiba Seal oil feeding apparatus of rotating electrical machine
CN107687420A (zh) * 2017-03-21 2018-02-13 深圳市宝安东江环保技术有限公司 混合密封介质的碳环密封系统和方法
US11067320B2 (en) * 2014-12-26 2021-07-20 Mitsubishi Heavy Industries Compressor Corporation Gas recovery system for compressor, compressor system, and refrigeration cycle system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608380A (en) * 1947-12-03 1952-08-26 Union Carbide & Carbon Corp Shaft seal for low-temperature expansion engines
FR1125782A (fr) * 1954-06-19 1956-11-07 Tech Studien Ag Dispositif pour assurer l'étanchéité par joint hydraulique de l'arbre d'une machine rotative pour installations thermiques de force motrice à fluide de travail gazeux

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2608380A (en) * 1947-12-03 1952-08-26 Union Carbide & Carbon Corp Shaft seal for low-temperature expansion engines
FR1125782A (fr) * 1954-06-19 1956-11-07 Tech Studien Ag Dispositif pour assurer l'étanchéité par joint hydraulique de l'arbre d'une machine rotative pour installations thermiques de force motrice à fluide de travail gazeux

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909012A (en) * 1973-03-14 1975-09-30 Technip Cie Gas sealing assembly
US4587076A (en) * 1981-05-21 1986-05-06 Framatome & Cie Sealing device for the drive shaft of a high pressure fluid pump
US4522024A (en) * 1981-09-18 1985-06-11 Bbc Brown, Boveri & Company, Limited Method for reducing the amount of nox and for raising the output of a gas turbine power station of the type utilizing an air reservoir, and a gas turbine power station, of this type, operating in accordance with this method
WO2010118977A1 (de) 2009-04-16 2010-10-21 Siemens Aktiengesellschaft Mehrstufiger turboverdichter
CN102803738A (zh) * 2009-04-16 2012-11-28 西门子公司 多级涡轮压缩机
CN102803738B (zh) * 2009-04-16 2016-02-10 西门子公司 多级涡轮压缩机
US20120098206A1 (en) * 2010-10-22 2012-04-26 Kabushiki Kaisha Toshiba Seal oil feeding apparatus of rotating electrical machine
US9093872B2 (en) * 2010-10-22 2015-07-28 Kabushiki Kaisha Toshiba Seal oil feeding apparatus of rotating electrical machine
US11067320B2 (en) * 2014-12-26 2021-07-20 Mitsubishi Heavy Industries Compressor Corporation Gas recovery system for compressor, compressor system, and refrigeration cycle system
CN107687420A (zh) * 2017-03-21 2018-02-13 深圳市宝安东江环保技术有限公司 混合密封介质的碳环密封系统和方法
CN107687420B (zh) * 2017-03-21 2019-04-19 深圳市宝安东江环保技术有限公司 混合密封介质的碳环密封系统和方法

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Publication number Publication date
JPS4929221B1 (enrdf_load_stackoverflow) 1974-08-02

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