• 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:
    A system of sealing a shaft from a wearing gaseous compressed medium includes a sealing box arranged on a shaft, a source of scavenging gas, a lubricating element which communicates with the source of scavenging gas so that a lubricant in the lubricating element is under a pressure of scavenging gas higher than a medium pressure in a medium chamber and is supplied to the sealing box, and a throttling element for throttling a portion of scavenging gas from the source and supplying the throttled portion of the scavenging gas into the region of the sealing box.
    公开号:SU1691634A1
    申请号:SU837772819
    申请日:1983-02-03
    公开日:1991-11-15
    发明作者:Петер Змуда；Клаус ВЕРНЕР；Райнер Вернеке
    申请人:Топливный Институт, Г.Фрейберг (Инопредприятие)；
    IPC主号:
    专利说明:

    The invention relates to a sealing technique and can be used to seal machine elements on rotating shafts of relatively compressed and highly abrasive materials, such as carrier gas / dust slurries in the high density flow region.
    Sealing the environment with low concentrations of dust streams with a load of about 10–30 kg / m at relatively low system pressures of about 0.2 MPa is possible with conventional gland packings with a lubricating ring in communication with the lubrication head. The development of technology with a high-density flow, which is used, for example, in gasification of coal yelled, places higher demands on compaction. The resulting dust concentrations are 300 to 500 kg / m1 of carrier gas at system pressures up to 4 MPa. Under these conditions, due to the high pressure and high loading ratio of the dust / carrier gas slurry in a known solution (for example, UK patent No. 1392046, cl. F 16 J 15/18, 1975), the smallest dust particles will be carried by a gas leak . The growing accumulation of solids leads to the formation of a crust, the destruction of the packing and, finally, to the blocking of the shaft.
    The purpose of the invention is to increase the reliability of the sealing device.
    The goal is achieved by the fact that the device is provided with means for supplying purge gas, the lubrication ring is made with external and internal grooves and radio holes and is placed in front of at least the last packing element with its sealable object, the end of the shaft and bearing unit are closed with a cover the shaft and the lid of the object's body form a gap on the side of the object being compacted, while the means for supplying the purge gas is communicated with a gap or with a cavity between the stuffing box cover, the shaft and the tension device, It is lubricated, the head is in communication with the purge gas supply means, as well as the fact that it is equipped with a distributor, and the purge gas supply means is communicated with a gap through the distributor and that the tension device is brought out tightly out through the bearing assembly.
    The drawing shows a sealing device, a slit.
    As the penultimate element of the stuffing box 1 on the side of the object to be sealed 20, there is a lubrication ring 2 with internal and external grooves and radial holes connected to the lubrication head 4 by means of a channel 22 V of the lubrication head 4.
    The lubricant supply 17 is pressurized through the piston 18 by means of a purge gas whose pressure is higher than the pressure of the dust / carrier gas suspension and which is expediently identical with the carrier gas. Thus, when loosening or shrinking the stuffing box, the resulting gaps are filled with lubricant and a lubricant moves from the lubrication ring 2 in the direction of the gland cap 5. In the housing 14 there is an inflow space (gap) 3 for the purge gas associated with the corresponding openings with the purge feed means gas 24, and a throttle device 10 is connected between them. The inflow space 3 in the direction of the object to be sealed 20 is limited by the distributor 9, which distributes evenly the flow of purge gas along the blown gap. Purge pressure
    The gas Q by device 10 is throttled until it only slightly exceeds the pressure of the dust / carrier gas suspension. From the inflow space 3, the purge gas through the gap 13 formed by the protrusion of the shaft 12 and the housing cover 21, additionally enters the dust flow. Through the gap 13 located in front of the gland packing 1 as a result of a constant flow of purge gas, dust particles entering the compaction area are unlikely. Minor gas leaks are not covered.
    0 dust purge gas. If, due to pressure fluctuations, dust particles enter through the gap, then due to the higher pressure of the lubricant, simultaneous penetration of lubricant is ensured. Grease consumption is regulated
    J by setting the differential pressure on the throttle device 10
    Another variant of the device is possible in which the end of the shaft, the assembly
    J bearing which is sealed. 8, the gland packing 1 also provides a lubrication ring 2, which in the gland packing 1 takes the place of the penultimate sealing element on the side of the object to be sealed 20. The lubrication ring 2 is also connected by grooves 22 to the lubricant head 4 under pressure of the purge gas. This option is that the throttled part of the purge gas 0 for applying pressure to the gland packing 1 is used on the side of the gland cover 5 Through the fitting 8 there is an annular cavity 23 in the housing The bearings 19 associated with purge gas supply means 24. The sealed relative to the pressure housing
    5 of the bearing 19, loaded with a throttled purge gas pressure slightly exceeding the pressure of the dust / carrier gas suspension, ensures that
    five
    that there is no pressure differential from the object to be sealed 20 in the direction of the bearing assembly through the seal. Thereby eliminating the reasons for the transport of dust particles in the sealing elements. The resulting gaps are filled with a lubricant under pressure. From the side of the cell drum 11, in the gap 13. between the shaft 15 and the lid of the housing 21, a layer of lubricant is created which senses the penetrated dust particles. Therefore, after a certain period of operation, a mixture of dust grease arises there, which, however, does not lead to seizing of the shaft 15. The advantage of this design is that no additional gas, partly undesirable in many cases, is supplied to the dust / carrier gas suspension. In this case, the sealing device is based on the static pressure behind the gland packing 1, which eliminates losses from gas leakage through the seal, as well as on the use of lubricant under a certain pressure. The lubricant flow rate is also minimized by setting the correct pressure ratio at the throttle device 10, and the pressure of the purge gas over the pressure of the object to be sealed is also important. To adjust the tension of the stuffing box 1, a tensioning device 7 is made through the bearing housing 19, which is made in an airtight design, so that during operation it is possible to tension it.
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    权利要求:
    Claims (3)
    [1]
    1. Shaft sealing device for abrasive, gaseous compressed sealing media containing a stuffing box mounted on the shaft, placed in the stuffing box body mounted on the object body to be sealed, the object body cover, lubrication ring communicated with the lubrication head, tensioner and bearing assembly, characterized in that, in order to increase the reliability of the device, it is equipped with a purge gas supply means, the lubrication ring is provided with outer and inner grooves and radial flanges of the sealing object on the side of the object to be sealed, the end of the shaft and the bearing assembly are closed by a lid, a gap is formed between the shaft and the lid of the object’s body on the side of the object to be sealed, the purge gas supply means being communicated with a gap or a cavity between the gland cover, the shaft and the tensioner, the lubrication head in communication with the purge gas supply means.
    [2]
    2. The device according to claim 1, characterized in that it is provided with a distributor, and the means for supplying purge gas is communicated with a gap through the distributor.
    [3]
    3. The device according to paragraphs. 1 and 2, characterized in that the tensioning device is led out tightly out through the bearing assembly.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1691634A1|1991-11-15|Sealing device of shaft abrasive and gaseous compressed sealing media
    US4523764A|1985-06-18|Fluid-sealed shaft seal with bores for supplying and discharging fluid
    US4087097A|1978-05-02|Sealing device for the emergent shaft end of a rotating machine
    US4632403A|1986-12-30|Stern tube seal device providing a seal about a rotatable shaft
    US4193756A|1980-03-18|Seal assembly and method for providing a seal in a rotary kiln
    GB2061416A|1981-05-13|Shaft seals
    US6398484B1|2002-06-04|Centrifugal compressor and shaft seal
    US3033577A|1962-05-08|Oil seal
    GB1389832A|1975-04-09|Seal assemblies
    CA1218040A|1987-02-17|Simple dry feeder
    JPS63158363A|1988-07-01|Seal device for air rotary joint
    KR860001696B1|1986-10-17|Stern tube real device
    US2283022A|1942-05-12|Lubricant seal for bearings
    US4506692A|1985-03-26|Device for feeding a pressure medium into a shaft
    GB690569A|1953-04-22|Improvements in or relating to shaft seals
    JP2002022018A|2002-01-23|Shaft seal device by gland packing of rotation shaft
    GB1124203A|1968-08-21|Hydraulic gas seal system for piston type gas compressor
    US4219202A|1980-08-26|Axial mechanical seal
    US5158431A|1992-10-27|Shaft seal assembly, especially for high-pressure turbocompressors
    JPH0611096Y2|1994-03-23|Shaft sealing device such as powder mixer
    GB1496986A|1978-01-05|Construction comprising sealing means for preventing gas leakage along a reciprocating piston rod
    GB911384A|1962-11-28|Shaft seals
    SU1314167A1|1987-05-30|Shaft seal
    GB848621A|1960-09-21|Improvements in or relating to oil seals for shafts
    SU838226A1|1981-06-15|Shaft seal
    同族专利:
    公开号 | 公开日
    HU194371B|1988-01-28|
    DD208052A3|1984-03-21|
    YU52883A|1987-10-31|
    ATA344382A|1987-05-15|
    US4475735A|1984-10-09|
    FR2523249A1|1983-09-16|
    CS70483A1|1985-06-13|
    JPH026386B2|1990-02-08|
    GB2118260B|1986-01-15|
    JPS58152972A|1983-09-10|
    DE3234149A1|1983-09-22|
    GB8303315D0|1983-03-09|
    FR2523249B1|1987-09-04|
    AT384664B|1987-12-28|
    YU44083B|1990-02-28|
    DE3234149C2|1988-04-07|
    GB2118260A|1983-10-26|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2540360C2|2010-09-29|2015-02-10|Вяртсиля Финланд Ой|Device, seal assembly covering flange and sea ship screw shaft seal gasket|GB118185A|1917-05-09|1918-08-22|Gustav Honegger|Improvements in or relating to Stuffing Boxes.|
    US3082012A|1959-02-05|1963-03-19|Yuba Cons Ind Inc|Expansion joint and stuffing box|
    US3213798A|1964-03-16|1965-10-26|Ingersoll Rand Co|Sealing and cooling device for a pump shaft|
    US3392804A|1965-06-29|1968-07-16|Mc Donnell Douglas Corp|Lubrication system|
    DE1600502A1|1967-06-03|1970-01-29|Krauss Maffei Ag|Device for sealing an at least approximately vertical shaft duct|
    US3834715A|1972-04-26|1974-09-10|Dart Ind Inc|Pressure seal assembly|
    US3863935A|1974-01-09|1975-02-04|Marvin L Batch|Seal assembly and lubrication system in a pump for handling liquid materials|
    US3935710A|1974-07-18|1976-02-03|Westinghouse Electric Corporation|Gland steam reheater for turbine apparatus gland seals|
    US3990679A|1975-03-20|1976-11-09|Gray Tool Company|Stem sealing for high pressure valve or the like|
    JPS5217517U|1975-07-28|1977-02-07|
    FR2356064B1|1976-02-09|1978-11-17|Commissariat Energie Atomique|
    US4086029A|1976-12-06|1978-04-25|United States Steel Corporation|Method and apparatus for flushing the plunger of a positive displacement pump|US4556079A|1983-10-28|1985-12-03|Koppers Company, Inc.|Rotary vane valve including means for ensuring uniform distribution of purge gas|
    US4737087A|1984-12-10|1988-04-12|Barmag Ag|Drive shaft seal for gear pump and method|
    US4896890A|1989-07-10|1990-01-30|Ingersoll-Rand Company|Oil scavenge check valve apparatus|
    US5028205A|1989-12-14|1991-07-02|Ingersoll-Rand Company|Oil scavenger system for a seal for a rotary shaft|
    US5474302A|1992-08-27|1995-12-12|Ferrofluidics Corporation|On-site fillable ferrofluidic seal|
    US5806856A|1992-08-27|1998-09-15|Ferrofluidics Corporation|On-site fillable liquid magnetic seal|
    US5607165A|1995-06-07|1997-03-04|Cooper Cameron Corporation|Sealing system for a valve having biassed sealant under pressure|
    DE19738122A1|1997-09-01|1999-03-11|Waeschle Maschf Gmbh|Cell wheel lock for dosing bulk goods|
    US20030205864A1|2001-03-22|2003-11-06|Dietle Lannie L|Rotary sealing device|
    WO2002077499A1|2001-03-22|2002-10-03|Kalsi Engineering, Inc.|Rotary sealing device|
    US7118114B2|2003-05-15|2006-10-10|Woodward Governor Company|Dynamic sealing arrangement for movable shaft|
    US20070080501A1|2005-09-16|2007-04-12|Bal Seal Engineering Co., Inc.|Pressure gradient rotary sealing system|
    US20080067754A1|2006-09-14|2008-03-20|John Schroeder|Pressure gradient rotary sealing system with external piston|
    US20070120084A1|2005-11-29|2007-05-31|Stumbo Steven C|Fully independent, redundant fluid energized sealing solution with secondary containment|
    US7426936B2|2005-11-29|2008-09-23|Woodward Governor Company|Fully independent, redundant fluid energized sealing solution with secondary containment|
    DE102014002157A1|2014-02-19|2015-09-03|Rwe Power Aktiengesellschaft|Container for the treatment of granular or powdery bulk material|
    US10520035B2|2016-11-04|2019-12-31|United Technologies Corporation|Variable volume bearing compartment|
    CN106838329A|2017-03-31|2017-06-13|成都赛乐化新机电有限公司|Polyvinyl chloride mass polymerization bottom portion's mechanical seal assembly|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DD82237937A|DD208052A3|1982-03-08|1982-03-08|SEALING SYSTEM ON WAVES AGAINST STRONG SLIPPING, GASOFUL, COMPRESSED MEDIA|
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