Gas sealing assembly
阅读：668发布：2023-05-11
专利汇可以提供Gas sealing assembly专利检索，专利查询，专利分析的服务。并且In and for a gas-handling machine, a shaft sealing assembly comprising two casings around the shaft, at a lower-pressure and at a higher-pressure side of the machine respectively. Each casing includes a first annular chamber receiving a gas to form a gas barrier around the shaft, and a second annular chamber receiving an inert gas. A third annular chamber is disposed between the first and second chambers and is held at a lower pressure than said chambers, while a fourth annular chamber is positioned at the side of the second chamber remote from the third chamber. The fourth chamber has a discharge to atmosphere at a position remote from the machine. The casing at the higherpressure side of the machine can additionally have a fifth chamber between the first chamber and the body of the machine, for receiving some of the gas being handled by the machine. The machine can be a compressor for liquefying natural gas.，下面是Gas sealing assembly专利的具体信息内容。
1. APPARATUS FOR LIQUEFYING GAS, OPERATIVE IN ASSOCIATION WITH A BOILER HAVING A FLUE, COMPRISING: A COMPRESSOR INCLUDING: A STATIONARY BODY HAVING A HIGHERPRESSURE SIDE AND A LOWER-PRESSURE SIDE; A SHAFT EXTENDING THROUGH THE BODY; AND A RESPECTIVE BEARING SUPPORTING THE SHAFT AT EACH SIDE, EACH BEARING BEING ARRANGED AT A SPACING FROM THE BODY; A SEALING ASSEMBLY COMPRISING: A RESPECTIVE CASING AT EACH OF THE HIGHER-PRESSURE AND LOWERPRESSURE SIDES OF THE MACHINE AND FIXED WITH RESPECT TO THE STATIONARY BODY, EACH CAUSING ENCLOSING A PORTION OF THE SHAFT BETWEEN THE BODY AND THE RESPECTIVE BEARING AND EACH CAUSING HAVING ANNULAR CHAMBERS WHICH ARE OPEN TOWARDS THE RESPECTIVE SHAFT PORTION, SAID ANNULAR CHAMBERS INCLUDING A FIRST CHAMBER, A SECOND CHAMBER WHICH IS DISPOSED BETWEEN THE FIRST CHAMBER AND THE RESPECTIVE BEARING, A THIRD CHAMBER BETWEEN THE FIRST AND SECOND CHAMBERS, A FOURTH CHAMBER BETWEEN THE SECOND CHAMBER AND THE RESPECTIVE BEARING, THE CASING AT THE HIGHER PRESSURE SIDE OF THE MACHINE ALSO INCLUDING A FIFTH CHAMBER BETWEEN THE FIRST CHAMBER AND THE BODY OF THE MACHINE; MEANS FOR INTRODUCING A BARRIER-ACTION GAS UNDER PRESSURE INTO THE FIRST CHAMBERS; MEANS FOR INTRODUCING AN INERT GAS UNDER PRESSURE INTO THE SECOND CHAMBERS, SAID MEANS FOR INTRODUCING INERT GAS INTO THE SECOND CHAMBERS INCLUDING A PURIFICATION DEVICE FOR TREATING FLUE GAS OF THE BOILER FLUE; A MONITORING MEANS FOR MONITORING THR FLUE GAS PURIFICATION; AN INERT GAS GENERATOR, A NITROGEN STORAGE RESERVIOR; THE MONITORING MEANS BEING COUPLED TO SAID INERT GAS GENERATOR AND TO SAID NITROGEN STORAGE RESERVOIR FOR CAUSING AN OUTPUT FLOW FROM THE INERT GAS GENERATOR AND/OR THE NITROGEN STORAGE RESERVOIR WHEN A DEFICIENCY IN THE PURIFIED FLUE GAS IS DETECTED. AND CAUSING SAID OUTPUT FLOW TO BE MIXED WITH THE FLUE GAS; A GAS FLOW-PRODUCING MEANS FOR DISPLACING THE PURIFIED FLUE GAS INTO THE SECOND CHAMBERS; A VALVE OPERABLY COUPLED TO THE GAS FLOW-PRODUCING MEANS TO CONTROL THE OUTPUT OF THE GAS FLOW-PRODUCING MEANS; AND A PRESSURE REGULATOR COUPLED TO SENSE THE PRESSURES IN THE SECOND AND THIRD CHAMBERS AND OPERABLY COUPLED TO SAID VALVE TO CONTROL SAID VALVE AS A FUNCTION OF THE PRESSURES IN THE SECOND ABD THIRD CHAMBERS; MEANS CONNECTED TO THE THIRD CHAMBERS FOR PRODUCING THEREIN A PRESSURE WHICH IS LOWER THAN THE PRESSURE IN THE FIRST AND SECOND CHAMBERS; A CONDUIT CONNECTED TO THE FOURTH CHAMBERS AND OPEN FOR DISCHARGE AT A POSITION REMOTE FROM THE COMPRESSOR; AND MEANS COUPLED TO THE LOWER-PRESSURE SIDE OF THE COMPRESSOR FOR INTRODUCING INTO THE FIFTH CHAMBER GAS BEING HANDLED BY THE COMPRESSOR, FROM THE LOWER-PRESSURE SIDE OF THE COMPRESSOR.
2. Apparatus according to claim 1, wherein said gas flow-producing means comprises a pump.
3. Apparatus according to claim 1, wherein said means for introducing barrier-action gas into the first chambers comprises a source of barrier-action gas; a valve coupled to control the flow of barrier-action gas from said source; and a pressure regulator responsive to the pressures in said first and fifth chambers at the high-pressure side of the machine and operatively coupled to said valve to control said valve as a function of said pressures in said first and fifth chambers at the high-pressure side of the machine.
4. Apparatus according to claim 3, wherein said barrier-action gas comprises at least one of the fuel gas and the purge gas from the compressor.
5. Apparatus for liquefying gas, operative in association with a gas turbine, comprising: a compressor including: a stationary body having a higher-pressure side and a lower-pressure side; a shaft extending through the body; and a respective bearing supporting the shaft at each side, each bearing being arranged at a spacing from the body; a sealing assembly comprising: a respective casing at each of the higher-pressure and lower-pressure sides of the machine and fixed with respect to the stationary body, each casing enclosing a portion of the shaft between the body and the respective bearing and each casing having annular chambers which are open towards the respective shaft portion, said annular chambers including a first chamber, a second chamber which is disposed between the first chamber and the respective bearing, a third chamber between the first and second chambers, a fourth chamber between the second chamber and the respective bearing, the casing at the higher-pressure side of the machine also including a fifth chamber between the first chamber and the body of the machine; means for introducing a barrier-action gas under pressure into the first chambers; means for introducing an inert gas under pressure into the second chambers, said means for introducing inert gas into the second chambers including a purification device for treating the discharge from said turbine; a monitoring means for monitoring the purification of the turbine discharge; an inert gas generator; a nitrogen storage reservoir; the monitoring means being coupled to said inert gas generator and to said nitrogen storage reservoir for causing an output flow from the inert gas generator and/or the nitrogen storage reservoir when a deficiency in the purification of the turbine discharge is detected, and causing said output flow to be mixed with the turbine discharge; a gas flow-producing means for displacing the purified turbine discharge into the second chambers; a valve operably coupled to the gas flow-producing means to control the output of the gas flow-producing means; and a pressure regulator coupled to sense the pressures in the second and third chambers and operably coupled to said valve to control said valve as a function of the pressures in the second and third chambers; means connected to the third chambers for producing therein a pressure which is lower than the pressure in the first and second chambers; a conduit connected to the fourth chambers and open for discharge at a postion remote from the compressor; and means coupled to the lower-pressure side of the compressor for introducing into the fifth chamber gas being handled by the compressor, from the lower-pressure side of the compressor.
6. Apparatus according to claim 5, wherein said gas flow-producing means comprises a pump.
7. Apparatus according to claim 5, wherein said means for introducing barrier-action gas into the first chambers comprises a source of barrier-action gas; a valve coupled to control the flow of barrier-action gas from said source; and a pressure regulator responsive to the pressures in said first and fifth chambers at the high-pressure side of the machine and operatively coupled to said valve to control said valve as a function of said pressures in said first and fifth chambers at the high-pressure side of the machine.
8. Apparatus according to claim 7, wherein said barrier-action gas comprises at least one of the fuel gas and the purge gas from the compressor.
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