EP0314133B1 - Appareil de compression de fluides avec refroidissement à l'huile - Google Patents

Appareil de compression de fluides avec refroidissement à l'huile Download PDF

Info

Publication number
EP0314133B1
EP0314133B1 EP88117931A EP88117931A EP0314133B1 EP 0314133 B1 EP0314133 B1 EP 0314133B1 EP 88117931 A EP88117931 A EP 88117931A EP 88117931 A EP88117931 A EP 88117931A EP 0314133 B1 EP0314133 B1 EP 0314133B1
Authority
EP
European Patent Office
Prior art keywords
gas
piping
air
oil separator
compressor
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.)
Expired - Lifetime
Application number
EP88117931A
Other languages
German (de)
English (en)
Other versions
EP0314133A3 (en
EP0314133A2 (fr
Inventor
Hiroyuku Matsuda
Taisuke Torigoe
Shiro Yoshihara
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP0314133A2 publication Critical patent/EP0314133A2/fr
Publication of EP0314133A3 publication Critical patent/EP0314133A3/en
Application granted granted Critical
Publication of EP0314133B1 publication Critical patent/EP0314133B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/28—Safety arrangements; Monitoring

Definitions

  • This invention relates to a fluid compressor, and more particularly to a safety device suitable for an oil cooled type air compressor.
  • lubricating oil is supplied to the compression section.
  • This lubricating oil which provides the double function of lubrication and sealing, cools the compressed air whose temperature has risen because of the heat of compression, and moves to an oil separator. After being separated from the compressed air by the oil separator, the lubricating oil is cooled by water or air and then supplied to the compression section again. As this cycle is repeated, the lubricating oil is deteriorated through oxidization due to the heat of compression. Part of the lubricating oil is carbonized and the thus carbonized components move to the oil separator with the lubricating oil.
  • Japanese Patent Laid-Open No. 59-115493 discloses a device for detecting such spontaneous ignition.
  • a detection member made of a material which fuses with heat is provided in an oil separating element of the oil separator, so that the ignition may be detected through the fusion of the detection member caused by the heat of ignition of the oil separating element.
  • the above object is attained by connecting an auxiliary piping to a main piping which is connected to a secondary side section of the oil separator, and by providing in the auxiliary piping with a gas detector for detecting a gas which is generated, increased or decreased at an early stage of any burning in the oil separator, the gas detector outputting a signal for opening an emergency stop circuit of an operation control of the compression apparatus to effect an emergency stop thereof.
  • the gas detector upon detecting the gas generated, increased or decreased by the burning in the oil separator, the gas detector generates a detection signal by means of which the compression apparatus is stopped.
  • the invention is embodied as an oil cooled screw compressor system.
  • the air serving as the working fluid is sucked by a compressor 7 through a suction throttle valve 6.
  • the air is compressed in the compressor 7 to a predetermined pressure and is then discharged to an oil separator 8 through a piping 21.
  • the oil separator 8 includes an element 9 which is adapted to separate an oil injected into the compressor during the compression process, from the compressed air.
  • the material of this element 9 may be glass wool, for example.
  • the air which has passed through this element 9, i.e. the air which is discharged from the oil separator 8, is delivered to a pressure regulator valve 10 which has a check valve and is provided in a main piping 22.
  • the air which has passed through this pressure regulator valve 10 flows through the main piping 22 and is discharged as the supply air. Further, the air which has passed through this element 9 serves to control the throttle amount of the above-mentioned suction throttle valve 6 through the intermediary of an air discharge valve 11, thereby controlling the suction amount.
  • An auxiliary piping 23 branches off the main piping 22 at a position on the downstream side of the pressure regurator valve 10. A part of the discharge air is supplied, as a sample, to this auxiliary piping 23 through a pressure reducing valve 12 or an orifice so that the gas detection may be effected.
  • This sampling air for the gas detection is regulated to a certain flow rate and pressure by the pressure reducing valve 12 and is delivered to a sensor unit 13.
  • the sensor unit 13 includes a filter 14, a gas detector 2, an electronic circuit 3, a relay contact 4, and an orifice 16. In this sensor unit 13, the above-mentioned air for the gas detection flows through the filter 14 to the gas detector 2.
  • the gas detector 2 includes, for example, as shown in Fig.
  • a container 15 which receives a CO gas sensor 1 and is sealed by means of an O-ring 30.
  • the discharge air for sampling is supplied in the container through an inlet 31.
  • the CO gas sensor 1 is arranged in the flow of the discharge air such that a CO gas density in the air flow may be detected with high accuracy. After the gas detection, the air flows out through an outlet 32 and is discharged in the atmosphere through the orifice 16 as shown in Fig. 1.
  • the CO gas sensor 1 is of a thermal conduction type which detects any change in its thermal and electrical conduction due to the absorption of gas as a change in its resistance and transforms the detected change into an electric signal by means of the electronic circuit 3.
  • the sensor then operates the relay contact 4 of the sensor unit, which contact is arranged in the operation circuit of a starting unit 5 provided for controlling the operation of the compressor.
  • the starting unit 5 includes a relay 88 for operating the compressor 7, an activating contact BS and a stopping contact BSS for the compressor 7 as well as a normally opened contact 88a of the relay 88, the above-mentioned relay contact 4 being connected in series to the relay 88.
  • the relay contact 4 which is normally ON is turned OFF, thereby cutting off the operation circuit.
  • the CO gas sensor 1 is of a type which can be used under pressure, it may be arranged directly in the main piping 22 on the outlet side of the pressure regulator valve 10.
  • the system may be constructed as shown in Fig. 3, wherein an orifice 24 and the detector 2 are arranged in the branch piping 23 for detecting gas, and a plate 17 is fixed to the container of the gas detector by means of screws for securing the CO gas sensor 1 so that the sensor may withstand the pressure of the discharge gas.
  • the air is returned to the suction inlet of the compressor 7 through a return piping 25 so that pressure differential may be developed across the sensor unit, or to the main piping 22 for the compressed air through a return piping 26.
  • This arrangement enables a constant amount of air to flow through the gas detector 2, thereby performing the detection of CO gas.
  • the sensor unit cuts off operation circuit of the starting unit for the compressor in the same manner as described with reference to the embodiment shown in Fig. 1.
  • any ignition or combustion can be detected within one minute after its occurring, so that the compressor can be stopped before smoke and flames are generated.
  • a conventional temperature sensor it takes about three and half minutes at the earliest to detect such ignition, and the burning would be developed to a considerable degree.
  • the safety device according to this invention can be installed in any compressor system solely by providing a branch piping on the secondary side of the oil separator. Accordingly, it is easy to apply the invention to a compressor which has already been in practical work. Additionally, since no conventional temperature sensor has to be provided, the reliability of the device can be improved.
  • the gas sensor involves no erroneous operation due to loading and unloading, so that a high accuracy in detection and a long service life of the device are ensured.
  • the device may also be used as a sensor for detecting oil deterioration as well as for detecting time for replacing the element of the oil separator with a new one. Consequently, the device will contribute much in improving the reliability of devices of this kind and developing a maintenance-free system for the future.
  • the above-described embodiments of this invention make it possible to detect any burning or combustion of the element in the oil separator more quickly than any other temperature sensor, thereby eliminating one of the factors causing a fire. Further, since the safety device according to the invention can also serve as an alarm for oil deterioration and element replacement, the device may find its use as a highly reliable maintenance device.
  • the present invention makes it possible to detect any ignition or burning in the oil separator at an early stage and to effect an emergency stop of the fluid compressor, thereby avoiding a secondary ignition in other sections of the system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)

Claims (5)

  1. Dispositif de compression de fluide, refroidi par huile, comprenant des moyens formant compresseur de fluide servant à comprimer, à une pression prédéterminée, un fluide de travail aspiré dans ces moyens par une entrée, et refouler le fluide de travail comprimé par une sortie, des moyens séparateurs d'huile (8) servant à séparer l'huile injectée dans lesdits moyens formant compresseur (7) pendant l'opération de compression du fluide de travail comprimé, des moyens formant canalisation principale (22) pour mettre en communication lesdits moyens séparateurs d'huile (8) et une extrémité de service du fluide comprimé, caractérisé par des moyens formant canalisation auxiliaire (23) montés en dérivation à partir desdits moyens formant canalisation principale (22), et une unité de détection (13) prévue dans lesdits moyens formant canalisation auxiliaire (23) pour détecter la densité d'un gaz dans le fluide de travail, densité qui varie lorsqu'une combustion s'effectue dans lesdits moyens séparateurs d'huile (8), et arrêter lesdits moyens formant compresseur (7) lors de la détection d'une modification dans le gaz.
  2. Dispositif selon la revendication 1, caractérisé en ce que lesdits moyens formant canalisation auxiliaire (23) communiquent soit avec un côté aspiration desdits moyens formant compresseur (7), soit avec une partie desdits moyens formant canalisation principale (22), qui est plus proche de ladite extrémité de service du fluide comprimé que la partie desdits moyens formant canalisation principale (22) à partir de laquelle s'étend en dérivation ladite canalisation auxiliaire (23).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le dispositif de sécurité situé sur le côté refoulement du séparateur d'huile (8) comprend des moyens (2) de détection de gaz servant à détecter la densité d'un gaz, densité qui varie lorsqu'une combustion s'effectue dans ledit séparateur d'huile (8), des moyens formés d'un circuit (3) pour transformer un signal de détection desdits moyens (2) de détection de gaz en un signal électrique, et des moyens de commande (5) servant à commander l'entraînement et l'arrêt desdits moyens formant compresseur (7) en fonction d'un signal de sortie desdits moyens formés d'un circuit (3).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que le fluide de travail est l'air et que l'unité de détection (13) est prévue dans lesdits moyens formant canalisation auxiliaire (23) pour détecter le gaz CO produit dans l'air comprimé lorsqu'une combustion s'effectue dans lesdits moyens séparateurs d'huile (8) et arrêter lesdits moyens formant compresseur (7) lors de la détection du gaz CO.
  5. Dispositif selon la revendication 4, caractérisé en ce que le dispositif de détection du gaz CO installé dans une canalisation (23) pour la détection d'une densité du gaz CO dans un écoulement d'air circulant dans la canalisation (23) comprend un récipient (15) possédant une entrée d'air (31) et une sortie d'air (32), et un détecteur de gaz CO (1) monté d'une manière étanche à l'air dans ledit récipient(15), l'entrée d'air (31) et la sortie d'air (32) dudit récipient (15) et dudit détecteur de gaz CO (1) étant disposées de telle sorte que ledit détecteur de gaz CO (1) est disposé dans un écoulement d'air circulant dans la canalisation (23).
EP88117931A 1987-10-28 1988-10-27 Appareil de compression de fluides avec refroidissement à l'huile Expired - Lifetime EP0314133B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62270173A JP2728409B2 (ja) 1987-10-28 1987-10-28 油冷式スクリュー圧縮装置
JP270173/87 1987-10-28

Publications (3)

Publication Number Publication Date
EP0314133A2 EP0314133A2 (fr) 1989-05-03
EP0314133A3 EP0314133A3 (en) 1990-01-03
EP0314133B1 true EP0314133B1 (fr) 1992-02-26

Family

ID=17482546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88117931A Expired - Lifetime EP0314133B1 (fr) 1987-10-28 1988-10-27 Appareil de compression de fluides avec refroidissement à l'huile

Country Status (4)

Country Link
EP (1) EP0314133B1 (fr)
JP (1) JP2728409B2 (fr)
KR (1) KR930006376B1 (fr)
DE (1) DE3868586D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8105051B2 (en) 2004-06-18 2012-01-31 Edwards Limited Vacuum pump

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005033519A1 (fr) * 2003-10-01 2005-04-14 City University Machine multi-rotor a deplacement positif
DE102005010690B4 (de) * 2005-03-09 2007-04-12 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Öleingespritzter Verdichter mit Temperaturschalter
US9856866B2 (en) 2011-01-28 2018-01-02 Wabtec Holding Corp. Oil-free air compressor for rail vehicles
KR102533332B1 (ko) * 2017-12-29 2023-05-17 대우조선해양 주식회사 윤활유 샘플링 시스템 및 방법

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB643495A (en) * 1939-03-28 1950-09-20 Airseco S A R L Means for indicating or preventing overheating of the mixture of air and oil vapours in an air compressor
JPS5535899A (en) * 1978-09-05 1980-03-13 Honeywell Inc Combustion efficiency control system
JPS55146906U (fr) * 1979-04-10 1980-10-22
JPS5542198U (fr) * 1979-06-28 1980-03-18
JPS59115493A (ja) * 1982-12-22 1984-07-03 Hitachi Ltd スクリユ−流体機械のオイルセパレ−タエレメント発火検出装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol 8. no. 238 (M-335)(1675), 31st October 1984 *
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 230(M-333)(1667), 23rd October 1984 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8105051B2 (en) 2004-06-18 2012-01-31 Edwards Limited Vacuum pump

Also Published As

Publication number Publication date
KR930006376B1 (ko) 1993-07-14
EP0314133A3 (en) 1990-01-03
JPH01113586A (ja) 1989-05-02
JP2728409B2 (ja) 1998-03-18
KR890006978A (ko) 1989-06-17
EP0314133A2 (fr) 1989-05-03
DE3868586D1 (de) 1992-04-02

Similar Documents

Publication Publication Date Title
US5477731A (en) Method and apparatus for detecting a fouled fluid filter
US6285291B1 (en) Detection of airborne pollutants
US5621164A (en) Leak test system
US9145783B2 (en) Seal gas monitoring and control system
EP0591886A2 (fr) Procédé et dispositif pour détecter une anomalie dans une installation d'alimentation de gaz
US4139339A (en) Flare gas stack with purge control
JPS60256596A (ja) ターボ圧縮機のサージの検出制御装置並びに方法
JPS6171214A (ja) 車両用空気調和装置
KR850008206A (ko) 냉동시스템의 제어시스템과 작동방법
EP0525566B1 (fr) Méthode et appareil pour la détermination du colmatage d'un filtre, particulièrement un filtre d'un système d'échappement
US10786778B2 (en) Power supply control device of nitrogen gas generator
EP0314133B1 (fr) Appareil de compression de fluides avec refroidissement à l'huile
KR900005981B1 (ko) 정화장치를 갖는 냉동시스템 및 그의 작동방법
EP0244074B1 (fr) Systèmes de sécurité pour broyeurs pulvériseurs à charbon
US4846410A (en) Apparatus for monitoring low-level combustibles
US4084157A (en) Smoke and heat detector alarm
EP0132974B1 (fr) Systèmes de sécurité pour broyeuses à charbon
US3086583A (en) Burner control apparatus
US4778113A (en) Apparatus for monitoring low level combustibles
US4653698A (en) Safety system for coal pulverizers
US20210052999A1 (en) Method and system for monitoring a fluid system configured to operate with a filter
US4095934A (en) Waste gas recovery
US4665689A (en) Exhaust system for the combustion gases of an internal combustion engine
KR910000680B1 (ko) 냉동시스템 및 작동방법
JPH10196577A (ja) 油冷式スクリュー圧縮機

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19881027

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 19901212

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 3868586

Country of ref document: DE

Date of ref document: 19920402

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20071026

Year of fee payment: 20

Ref country code: GB

Payment date: 20071031

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20071206

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20081026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20081026