• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SU772495A3
    申请号:SU772464057
    申请日:1977-03-31
    公开日:1980-10-15
    发明作者:Мерлин Андерсон Карл
    申请人:Кэрриер Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    one
    The invention relates to the field of compressor engineering, and, in particular, to centrifugal compressors.
    A centrifugal copressor is known, comprising a housing with a suction and 5 discharge cavities and a shaft mounted in it connected to the gearbox l.
    However, with such a design, losses due to friction of gears 0 of the gearbox on the working fluid, vortex and pumping losses adversely affect the efficiency of the copressor.
    The closest to the invention to the technical essence is a 15 centrifugal compressor, comprising a housing with a suction and discharge cavities and a shaft mounted therein with an impeller and a gearbox located in a sealed chamber
    With this arrangement, when the impeller and the gearbox are placed in the same housing, the flow path of the working fluid from the compressor discharge cavity through the shaft seal into the sealed chamber 25 relatively increases the pressure of the working fluid in it and therefore intensifies the above-mentioned losses occurring during rotation of the gears of the gearbox.30
    The purpose of this invention is to improve the economy.
    This goal is achieved by the fact that a selection cavity is made in the housing and centrifugal oil separators are installed in it and the chamber with radial openings interconnected, the extraction oil separator has a larger outer diameter, and the compressor is equipped with an ejector, the high-pressure nozzle and the outlet part of which are connected with the discharge and suction cavities, and the low-pressure nozzle is connected to the extraction cavity.
    The drawing shows a centrifugal compressor designed for a refrigeration system operating on vapor compression and made in accordance with the present invention; lengthwise cut.
    The compressor includes a housing 1 with a suction 2 and a discharge 3 cavities and a shaft 4 installed in it with impellers 5, 6 and a gearbox 7 located in the pressure chamber 8. A extraction cavity 9 is made in housing 1 and centrifugal baffles 10, 11 with radial holes 12, 13 interconnected by a channel 14 passing inside shaft 4.
    The oil separator 10 of the extraction cavity 9 has a larger outer diameter than the oil separator 11. The compressor is equipped with an ejector 15, a high-pressure nozzle 16 and the outlet part 17 of which are connected respectively to the discharge 3 and suction 2 cavities, and the low-pressure nozzle 18 is connected to the stop valve 20 to cavity 9 selection.
    The suction cavity is connected to the inlet of the impeller 5 through a hole 21 located behind the rotary guide apparatus 22.
    During operation, the working fluid, in this case the cooling medium from the evaporator (conventionally not shown in the drawing), enters the compressor inlet, passes the guiding device 22, then the impellers 5, 6 and enters the discharge cavity 3, from which it goes to the condenser ( In other words, conventionally not shown) of the cooling system. In this case, the regulation of the apparatus 22 by changing the angle of installation of its blades provides a change in the performance of the compressor. The hermetic chamber 8 is filled with a mixture of suspended particles of oil supplied to the gears of the gearbox 7 and the cooling medium in the vapor state flowing through the shaft seal from the discharge cavity 3 due to the pressure difference in cavity 3 and chamber B. During rotation of the oil separators 10, 11 under the action of differential the pressures due to the difference in their diameters, the cooling medium from the chamber 8 through the holes 13, -12 and the channel 14 enters the extraction cavity 9, and the oil particles are discarded. (beating off) the rotating oil separator 11 and do not fall into the holes 13. Thus, the oil separators 11, 10 ensure the separation of suspended oil particles from the coolant vapors and the collection of the latter in the extraction cavity 9.
    The ejector 15 under the action of the ejection jet of cooling medium coming from the injection cavity 3 to the high-pressure nozzle 16 and flowing out of the latter, sucks the vapor from the selection cavity 9 through conduit 19 and supplies them to the suction cavity 2, from which it forms the mixture through the opening 21 to enter impeller 5.
    It is recommended that the efficiency of the ejector 15 be selected so as to maintain the pressure in chamber 8 several times higher than atmospheric.
    The shut-off valve 20 provides for the flow of vapor from the extraction cavity 9 to the ejector 15 and prevents the flow in the opposite direction.
    The increase in the efficiency of the described compressor is achieved by reducing pumping, vortex losses and friction losses of the gears of the gearbox 7 due to a decrease in the density of the medium in which they rotate. In turn, the decrease in density is achieved by reducing the partial pressure of steam in chamber 8 at operation 0 of the ejector 15.
    An advantage of the described invention is to reduce the loss of the cooling medium in cooling systems, since the leakage of the medium is practically returned to the cycle. This eliminates the need to provide special drain-flooding equipment.
    权利要求:
    Claims (2)
    [1]
    1. US patent 4010016, cl. 95-473, published. 03/01/77.
    [2]
    2. Patent of Great Britain No. 1353875, cl. F 1 G, pub. 1974.
    类似技术:
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    US3253816A|1966-05-31|De-aeration of sealing fluid in aerated rotary fluid machines
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    US4074954A|1978-02-21|Compressor
    US3478957A|1969-11-18|Oil separator for rotary compressor
    US3973879A|1976-08-10|Liquid ring compressor
    US3676021A|1972-07-11|Radial unloader valve for thru-slot rotary compressor
    US3045603A|1962-07-24|Self-priming centrifugal pump
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    RU2685346C2|2019-04-17|Filtration of flow consisting of gas and particles
    同族专利:
    公开号 | 公开日
    AR211061A1|1977-10-14|
    AU510867B2|1980-07-17|
    NL182585C|1988-04-05|
    DK165777A|1977-10-17|
    AU2228477A|1978-08-24|
    DE2714505A1|1977-10-27|
    BR7701867A|1978-01-24|
    FR2348379B1|1983-09-30|
    SE433525B|1984-05-28|
    FR2348379A1|1977-11-10|
    NL7703317A|1977-10-18|
    IT1074388B|1985-04-20|
    SE7703322L|1977-10-17|
    US4032312A|1977-06-28|
    CH606945A5|1978-11-30|
    MX144773A|1981-11-23|
    NL182585B|1987-11-02|
    DE2714505B2|1980-03-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2664274C1|2013-11-22|2018-08-15|Грии Електрик Апплиансес. Инк. Оф Чжухай|Centrifugal compressor and water-cooling unit equipped therewith|US1737870A|1924-06-05|1929-12-03|Archibald S Telfer|Pump|
    US2575923A|1948-12-29|1951-11-20|Gen Electric|Method and apparatus for pumping volatile liquids|
    US2757858A|1952-04-12|1956-08-07|Gen Motors Corp|Refrigerating apparatus|
    US3263435A|1963-09-26|1966-08-02|Carrier Corp|Lubricant separation and recovery system|
    FR1474303A|1966-03-22|1967-03-24|Worthington Corp|Refrigeration appliance|
    CH477659A|1967-07-05|1969-08-31|Sulzer Ag|Refrigeration system|
    CH494934A|1968-08-13|1970-08-15|Termomeccanica Italiana|Refrigeration installation comprising a compressor lubrication device|
    US3574478A|1968-10-21|1971-04-13|Laval Turbine|Sealing system for turbine and compressor bearings|
    US3650634A|1970-11-06|1972-03-21|Carrier Corp|Centrifugal refrigeration compressor|TW215120B|1991-08-05|1993-10-21|Carrier Corp|
    US5232588A|1991-10-29|1993-08-03|Edd D. Gryder|Environmentally beneficial bypass filter system for use with low pressure centrifugal refrigeration equipment|
    US5183134A|1992-01-13|1993-02-02|Triangle Engineered Products Co.|Lubrication system for air compressor|
    DE4435280B4|1994-10-01|2005-04-14|Institut für Luft- und Kältetechnik gemeinnützige Gesellschaft mbH|Guidance device for a hermetic, radial turbo compressor|
    US6068457A|1998-12-03|2000-05-30|American Standard Inc.|Lobed pinion drive shaft for refrigeration compressor|
    US6018962A|1998-12-16|2000-02-01|American Standard Inc.|Centrifugal compressor oil sump demister apparatus|
    US6698214B2|2002-02-22|2004-03-02|Thar Technologies, Inc|Method of refrigeration with enhanced cooling capacity and efficiency|
    US20070271956A1|2006-05-23|2007-11-29|Johnson Controls Technology Company|System and method for reducing windage losses in compressor motors|
    EP2715140B1|2011-05-31|2019-09-04|Carrier Corporation|Compressor windage mitigation|
    EP2979042B1|2013-03-25|2020-08-26|Carrier Corporation|Vapor compression system|
    EP2979043B1|2013-03-25|2020-08-19|Carrier Corporation|Compressor|
    EP2992274B1|2013-05-02|2020-05-06|Carrier Corporation|Compressor bearing cooling and lubrication via purge unit|
    US10234175B2|2013-06-04|2019-03-19|Daikin Industries, Ltd.|Turbo refrigerator|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/677,584|US4032312A|1976-04-16|1976-04-16|Centrifugal compressor|
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