EP0094457A1 - Sicherheitsanordnung für Vakuumpumpe - Google Patents

Sicherheitsanordnung für Vakuumpumpe Download PDF

Info

Publication number
EP0094457A1
EP0094457A1 EP82302456A EP82302456A EP0094457A1 EP 0094457 A1 EP0094457 A1 EP 0094457A1 EP 82302456 A EP82302456 A EP 82302456A EP 82302456 A EP82302456 A EP 82302456A EP 0094457 A1 EP0094457 A1 EP 0094457A1
Authority
EP
European Patent Office
Prior art keywords
exhauster
valve
housing
thermostat
chamber
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
Application number
EP82302456A
Other languages
English (en)
French (fr)
Other versions
EP0094457B1 (de
Inventor
Lothar Peter Schmitz
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.)
Gardner Denver UK Ltd
Original Assignee
Drum Engineering Co 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 Drum Engineering Co Ltd filed Critical Drum Engineering Co Ltd
Priority to EP82302456A priority Critical patent/EP0094457B1/de
Priority to AT82302456T priority patent/ATE18459T1/de
Priority to DE8282302456T priority patent/DE3269580D1/de
Publication of EP0094457A1 publication Critical patent/EP0094457A1/de
Application granted granted Critical
Publication of EP0094457B1 publication Critical patent/EP0094457B1/de
Expired 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/19—Temperature
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/70—Safety, emergency conditions or requirements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2270/00—Control
    • F05B2270/30—Control parameters, e.g. input parameters
    • F05B2270/303—Temperature
    • F05B2270/3032—Temperature excessive temperatures, e.g. caused by overheating

Definitions

  • the present invention is concerned with vacuum pumps or exhausters.
  • a problem with existing vacuum pumps is that of overheating in certain circumstances which can lead to early rotor bearing 'failure or, if not prevented, to complete seizure and failure of the rotor bearings.
  • the problem arises, for example, when the exhauster is pulling too high a vacuum for the cooling capabilities provided.
  • the power consumption of an exhauster at constant speed remains substantially constant over the whole vacuum range. However, at peak vacuum no air enters or leaves the exhauster and substantially all the power consumed in rotating the exhauster rotor is converted into heat.
  • the particular vacuum level at which overheating occurs depends on a number of factors such as (a) the rotor speed - cooling problems tend to be greater with higher speed machines; (b) the size of the exhauster - smaller machines run cooler than larger ones; (c) the ambient temperature - if this rises the problem can be aggravated; (d) the presence or otherwise of large cooling fans, large ribs and correct design of internal porting can affect the ability of a given machine to tolerate internally generated abnormal temperatures; (e) the presence of worn exhauster blades; dirt - e.g. road dirt, building up to reduce cooling efficiency.
  • One way of countering this problem would be to provide a sophisticated forced-air cooling system but this would considerably increase the overall cost of the machine.
  • Large two-stage exhausters are often water- cooled but are not suitable for many applications, such as on road tankers, being rather large, heavy and expensive.
  • an exhauster having a temperature responsive valve which is arranged to admit atmospheric air to the suction side of the exhauster in the event that the operation temperature of the exhauster exceeds a pre- determined value.
  • this takes the form of a snifter valve controlled by a thermostat located in a chamber in the exhauster housing.
  • the exhauster illustrated in the drawings is basically of conventional design and will not be described in detail herein. It includes a rotor 10 which is mounted for rotation within a stationary housing 12 by means of a central shaft 14 journalled in bearings 16,18. The rotor is eccentrically mounted relative to a cylindrical chamber 20 defined within the housing 12 whereby radial vanes 22, radially displaceable in respective slots 24, draw in air from a suction region of the chamber and deliver this air through an outlet port. The shaft is driven by means of a moving belt at 26.
  • the exhauster is conventional.
  • the exhauster includes a valve arrangement indicated generally at 28.
  • the valve 28 includes an annular body member 30 which is screwed into a tapped bore 32 in the exhauster housing.
  • the outer , end of the body member 30 defines a frusto-conical valve seat 34 which is adapted to co-operate with a frusto-conical closure member 36 carried by one end of a pin 38.
  • the other end of the pin 38 engages a thermostat unit 40 contained in a chamber 42 of the exhauster housing whereby, when the temperature at the thermostat unit 40 exceeds a pre-determined temperature, the pin is displaced to the left as viewed in Fig.
  • the valve thus provides a means of limiting the temperature variations for the exhauster without losing the capability of pulling full rated vacuum.
  • valve configuration and position illustrated any valve may be used which admits air to the suction side in dependence upon a predetermined temperature in the exhauster being exceeded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Non-Positive Displacement Air Blowers (AREA)
EP82302456A 1982-05-14 1982-05-14 Sicherheitsanordnung für Vakuumpumpe Expired EP0094457B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP82302456A EP0094457B1 (de) 1982-05-14 1982-05-14 Sicherheitsanordnung für Vakuumpumpe
AT82302456T ATE18459T1 (de) 1982-05-14 1982-05-14 Sicherheitsanordnung fuer vakuumpumpe.
DE8282302456T DE3269580D1 (en) 1982-05-14 1982-05-14 Safety arrangement for a vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82302456A EP0094457B1 (de) 1982-05-14 1982-05-14 Sicherheitsanordnung für Vakuumpumpe

Publications (2)

Publication Number Publication Date
EP0094457A1 true EP0094457A1 (de) 1983-11-23
EP0094457B1 EP0094457B1 (de) 1986-03-05

Family

ID=8189670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82302456A Expired EP0094457B1 (de) 1982-05-14 1982-05-14 Sicherheitsanordnung für Vakuumpumpe

Country Status (3)

Country Link
EP (1) EP0094457B1 (de)
AT (1) ATE18459T1 (de)
DE (1) DE3269580D1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0153968A1 (de) * 1984-03-03 1985-09-11 Vickers Systems GmbH Lenkhilfpumpe
EP0470459A1 (de) * 1990-08-09 1992-02-12 Siemens Aktiengesellschaft Verdichter
EP0480560A3 (en) * 1990-10-01 1992-10-21 Copeland Corporation Scroll machine with overheating protection
EP1288500A3 (de) * 2001-08-31 2003-08-06 ESAM S.p.A. Reguliervorrichtung für Kompressoren oder Absauggeräte

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB276541A (en) * 1926-11-30 1927-09-01 Westinghouse Air Brake Co Improvements in or relating to fluid compressors
US2124390A (en) * 1935-05-07 1938-07-19 Gen Electric Vacuum pump apparatus
GB752133A (en) * 1953-05-07 1956-07-04 Bendix Aviat Corp Fluid pumping system and regulating means therefor
US2768585A (en) * 1952-12-18 1956-10-30 Schwitzer Corp Pump control mechanism
FR2266008A1 (de) * 1974-03-29 1975-10-24 Abex Corp
US3918848A (en) * 1972-04-27 1975-11-11 Abex Corp Fluid pressure energy translating device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB276541A (en) * 1926-11-30 1927-09-01 Westinghouse Air Brake Co Improvements in or relating to fluid compressors
US2124390A (en) * 1935-05-07 1938-07-19 Gen Electric Vacuum pump apparatus
US2768585A (en) * 1952-12-18 1956-10-30 Schwitzer Corp Pump control mechanism
GB752133A (en) * 1953-05-07 1956-07-04 Bendix Aviat Corp Fluid pumping system and regulating means therefor
US3918848A (en) * 1972-04-27 1975-11-11 Abex Corp Fluid pressure energy translating device
FR2266008A1 (de) * 1974-03-29 1975-10-24 Abex Corp

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0153968A1 (de) * 1984-03-03 1985-09-11 Vickers Systems GmbH Lenkhilfpumpe
EP0470459A1 (de) * 1990-08-09 1992-02-12 Siemens Aktiengesellschaft Verdichter
EP0480560A3 (en) * 1990-10-01 1992-10-21 Copeland Corporation Scroll machine with overheating protection
EP1288500A3 (de) * 2001-08-31 2003-08-06 ESAM S.p.A. Reguliervorrichtung für Kompressoren oder Absauggeräte
US6817842B2 (en) * 2001-08-31 2004-11-16 Esam S.P.A. Device for regulating compressors or aspirators

Also Published As

Publication number Publication date
ATE18459T1 (de) 1986-03-15
DE3269580D1 (en) 1986-04-10
EP0094457B1 (de) 1986-03-05

Similar Documents

Publication Publication Date Title
KR100344716B1 (ko) 펌프의운전제어장치
KR100194078B1 (ko) 과열이 방지되는 스크롤 압축기
BE1020312A3 (nl) Compressorinrichting, evenals gebruik van zulke opstelling.
US4796571A (en) Thermal response type fluid fan coupling device
US5046326A (en) Transport refrigeration system
US5217359A (en) Scroll compressor with regulated oil flow to the back pressure chamber
US4570771A (en) Viscous fluid coupling having centrifugal valve means
KR930001918B1 (ko) 온도감응형 팬 유체커플링
KR970000866B1 (ko) 온도 감응형 유체식 팬 커플링 장치
US6561770B2 (en) Engine water pump with temperature responsive drive
US4741675A (en) Flow control system for a hydraulic pump
US4543046A (en) Rotary compressor
EP0094457B1 (de) Sicherheitsanordnung für Vakuumpumpe
US7954616B2 (en) Fluid friction clutch
US3698832A (en) Pump impeller housing with integral flow regulator
CA1125092A (en) Power conserving inducer
EP4092271A1 (de) System zum befördern von schmieröl in einem kompressor
CA1194009A (en) Vented compressor inlet guide
GB2087484A (en) Rotary vacuum-pumps
US4702360A (en) Viscous fluid coupling
US2938469A (en) Pump
JP2889499B2 (ja) ポンプ装置
EP0931939B1 (de) Vakuumpumpe
US3560120A (en) Rotary compressor
US3676021A (en) Radial unloader valve for thru-slot rotary compressor

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

AK Designated contracting states

Designated state(s): AT BE CH DE FR IT LI LU NL SE

17P Request for examination filed

Effective date: 19840107

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR IT LI LU NL SE

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

Ref country code: NL

Effective date: 19860305

Ref country code: LI

Effective date: 19860305

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19860305

Ref country code: CH

Effective date: 19860305

Ref country code: BE

Effective date: 19860305

Ref country code: AT

Effective date: 19860305

REF Corresponds to:

Ref document number: 18459

Country of ref document: AT

Date of ref document: 19860315

Kind code of ref document: T

ITF It: translation for a ep patent filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19860331

REF Corresponds to:

Ref document number: 3269580

Country of ref document: DE

Date of ref document: 19860410

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

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19860531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
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
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19890630

Year of fee payment: 8

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

Ref country code: DE

Effective date: 19910201