Патент USA US2135305код для вставки
Nov. 1, 1938. B. HOFFMANN 2,135,305 ELASTIC FLUID POWER PLANT Filed Jan. 21, 1937 /0 /8 p 26 InVenTor' Bruno Hoffmarm, I by 17/ 600W _H|‘ Afforne?. 2,135,305 Patented Nov. 1, 1938 UNITED STATES PATENT OFFICE 2,135,305 ELASTIC FLUID POWER PLANT Bruno Hoffmann, Spandau, Germany, aasignor to'General Electric Company, a corporation of New York Application January 21, 1937, Serial No. 121,653 In Germany February 17, 1936 5 "Claims. The present invention relates to elastic ?uid power plants, especially to the arrangement of the auxiliaries of portable plants as are used on _ charged from the boiler l2. More speci?cally, the pumps 19 and 20 are directly driven from the ‘ shaft of the turbine Ill and the pump 11 is driven power plants whereby they maybe readily put in from said shaft through the intermediary of bevel gears 33. The pump 23 and the blower 21 have a shaft 34 to which is secured a gas turbine wheel 35 driven by gases discharged from the boiler. operation and economically operated. - The gases are directed to the wheel 35 by means - locomotives and aircraft. . The object of my invention is to provide an improved construction and arrangement of such _ For a consideration of what I believe tov be of a nozzle diaphragm 36' and discharged from thereto in connection with the accompanying the wheel 35 into a ?ue 31. The shaft of the 10 pump 29 is driven from the shaft 34 through bevel gears 38. Thus, the primary drive means drawing. for the auxiliaries comprise the turbine Ill and 10 novel and my invention, attention is directed to the following description and the claims appended 1 The single ?gure of the drawing shows an elastic ?uid power plant arrangement embodying my invention as may be used advantageously for operating aircraft. " The power plant comprises an elastic ?uid engine in the form of a steam turbine I 0 for 20 driving a propeller ll. Elastic ?uid is supplied ' to the‘ turbine Ill from a boiler l2 having a heat ing element l3 connected to the turbine by a conduit ll. The exhaust ?uid of the turbine I0 is conducted to a condenser of the radiator type 25 '(CI. 60-11) l5, whence the condensate is discharged through a conduit 16 including a condensate pump “to a tank 19. _ I ‘ The auxiliaries'for operating the power plant , include in addition to the aforementioned con 30 densate pump 11 boiler feed pumping means, in the-present instance shown in the form of two pumps l9 and 20, connected in series, and receiv ing operating medium, in the present instance water, through a conduit 21 from the tank l8. The discharge of the pump 20 is'connected by a conduit 22 to the inlet ofthe heating element I3. the gas turbine 35, 36. To facilitate starting of the plant, I provide a secondary drive means or motor shown in the form of a combustion engine 39 having a shaft 40 which may be 'coupled by means including a clutch 4| with the shaft of the pumps i 9, 20 and by means including a clutch 42 with the shaft 34 of the pump 23. V20 /During starting, the clutch I2 is engaged to cause operation of the. pumps 23, 29 and of the blower 21 and thereby‘ to supply fuel and air to the burner 26 and lubricant or actuating ?uid to the bearings and servo motors. Thereafter, or 26 if desired, simultaneously the clutch 4| is en gaged to cause operation of the Dumps l1, I9, 20 and thereby to supply water to the boiler. As soon as the combustion has su?iciently developed to drive the gas turbine '35, 36. the clutch I2 is so. disengaged~ and ?nally upon operation of the turbine III the clutch ll is disengaged. In a preferred embodiment, as shown in the drawing, the pumps l1, I9, 20 are driven from the main turbine or prime mover in order automati 35 cally to change the supply of water to the boiler The auxiliaries further include a fuel pump 23 ‘ in response to changes of load on the turbine. for conveying fuel from a tank 24 through a con duit 25 into a burner 26 forming a part of the 40 boiler. Air for maintaining combustion is forced into the burner by means of a blower 21 having a discharge burner 26 . conduit 28 connected to _ the - As another auxiliary element for operating the 46 power plant I have shown in the present instance a lubricating pump 29 having an inlet conduit 39 connected to an oil tank 31 and a discharge conduit 32 for supplying oil to various elements requiring, all under pressure during operation, 50 such as bearings and servo motors (not shown). 55 ‘The other auxiliaries are driven by the exhaust gas turbine because their operation depends pri marily upon the load on the boiler. Further more, the other auxiliaries including the pump 23 and the blower 21 are to be operated at ?rst dur ing the heating of the boiler. It is also for this reason more ‘advantageous if they are driven by an engine, in the present instance, the gas tur bine, which is ready for operation before the turbine I0 is operated. ' Summarizing, the auxiliaries for operating a _ boiler, in the present instance a forced circula tiontype boiler, are divided intotwo groups,‘ a 50 In accordance with my invention, the auxiliar-~ ?rst group of essential auxiliaries including fuel ies l1, I9, 29, 23, 21, and 29 are divided into two and air supply means for the boiler, and a sec groups, one of which is driven from the shaft of ond group of other auxiliaries including pumping the turbine Ill and the other operated by means means for forcing the operating ?uid through the boiler. The ?rst group is normally operated of a gas turbine receiving combustion gases dis I ' 2 2,185,805 i by a gas turbine arranged to receive exhaust one group including the pumping means being' gases from the boiler, and the second group is , driven by the turbine, a gas turbine receiving combustion gases from the boiler for driving the arranged to be driven by a prime mover or other , power agency independent of the gas turbine. fuel pump and the blower, and means for first starting the fuel pump and'the blower and there after'the pumping means, said means including a single drive motor and clutches for separately The two groups are started successively in their order aforementioned by means including a drive motor and clutches for separately'connecting the drive motor tothe groups. The drive motor is connecting the motor with each of said groups to of relatively small size which is made possible by permit successive starting of the groups by a 10 the separate starting of the two groups. Once - the ?rst group including the essential auxiliaries has been started ‘and combustion gases are formed in the boiler and supplied to the gas tur bine, the latter takes over the operation of the 18 essential auxiliaries and the auxiliary drive motor becomes free to start the other auxiliaries. What I claim as new and desire to secure by ' Letters Patent-of the United States is: 1. Elastic ?uid power plant including the com \ bination of a prime mover, a boiler for producing elastic ?uid to vactuate the prime mover, auxil - iaries including pumping means for ‘forcing oper ating liquid into'the boiler and'other pumping means for forcing air and fuel into the boiler, said auxiliaries forming two groups, means in cluding the prime-mover for driving-one of said groups, means including a gas turbine receiving relatively small drive motor. 10 3. Auxiliaries for operating a boiler compris ing a ?rst group of essential auxiliaries, a second group of other auxiliaries, drive means for nor mally operating the two groups, and means including a single drive " motor for starting the 15 ?rst and then the second group, the" successive startinglof the two groups permitting the provi sion of a relatively small drive motor. 4. Auxiliaries for operating a boiler compris ing a ?rst group of essential auxiliaries including fuel and air supply means, a second group of other auxiliaries, drive means including a ‘gas turbine for connection to such boiler for nor mally operating the ?rst group, and means in cluding a single drive motor and clutches for successively starting the groups in the order aforementioned. ‘ combustion gases from the boiler for driving the - 5. Auxiliaries for operating a forced circu1a-, other groupfand auxiliary means including a tion type boiler comprising a ?rst group includ 30 combustion engine and clutches for successively ing fuel and air pumping means, a second group starting the groups. including pumping means for forcing operating 2. Elastic ?uid power plant including the com ?uid into the boiler, a gas turbine arranged to bination of an elastic fluid turbine, a condenser receive exhaust gases from such boiler normally for receiving exhaust ?uid from the ‘turbine, a to drive the ?rst group, a power agency inde-_ boiler connected to the condenser, auxiliaries pendent of the gas turbine normally to drive the 35 including pumping means for forcing condensate second group, and means including a’ single from the condenser into the boiler and a fuel drive motor for successively starting the two pump and a blower for forcing fuel and air’ into groups in the order aforementioned. . -the boiler, said auxiliaries forming two groups, BRUNO HOFFMANN.