Патент USA US2410810код для вставки
NQV. 12, 1945. v. CRQNSTEDT 2,410,810 DIAPHRAGM CONSTRUCTION FOR TURBINES ’ Filed July 23, 1943 _ 5 Sheets-Sheet 1 FIG. Nov. ‘12, 1946. V. CRONSTEDT ' 2,410,810 DIAPHRAGM CONSTRUCTION FOR TURBINES . Filed July 23, 1943 s Sheets-sheaf 2 Nov. 12, 1946. v. .CRONSTEDT 2,410,810 DIAPHRAGM CONSTRUCTION FOR TURBINES ' Filed July 23, 1943 3 Sheets-Sheet 3 Patented Nov. 12, 1946 2,4l0,8l0 UNITED STATES PATENT‘OFFICE 2,410,810 DIAPHRAGM CONSTRUCTION FOR TURBINES Val Cronstedt, Marlboro, Conn, assignor to United Aircraft Corporation, East Hartford, Conn, a corporation of Delaware Application July 23, 1943, Serial No. 495,931 5 Claims. (01. 253—78) 1 2 This invention relates to turbines and particu larly to the aligning of the split sections of the turbine diaphragms. casing ring has, in addition to the nozzles, a disc When a turbine is made up of several rows of diaphragms with nozzles, alternating with rows of rotating blades, the diaphragms are generally split to permit assembly of them with the rotor on which the blades are mounted. The inner portion of the split edges cannot be reached for fastening after assembly to the rotor. A feature of this invention is the maintenance of alignment of the edges of the diaphragms. This is particu larly desirable in gas turbines subjected to large temperature variations. Many turbines carry sealing rings at the inner edge of the diaphragm. Another feature of the ‘invention is the support of these sealing rings in the diaphragm. The co-pending application of Cronstedt and Ledwith, Serial Number 486,619 ?led May 11, 1943, shows a turbine in which the casing is made up of a number of rings, each of which has an integral diaphragm. A number of these casing rings are split for assembly purposes, and the outer edges of adjoining rings are con nected to form the casing. A feature of this in vention is the use of stepped pins at the inner edge of each diaphragm to hold the opposed halves of each casing ring in alignment. Other objects and advantages will be apparent from the speci?cation and claims, and from the accompanying drawings which illustrate what is now considered to be a preferred embodiment of the invention. ‘ ' Fig. l is a sectional view through the turbine. Fig. 2 is a transverse sectional view on line 2—2 of Fig. 1. Fig. 3 is a sectional view through the front casing ring of Fig. 2 along line 3—-3. The turbine shown includes a casing to built up of rings I2, M, l6 and I8 supported by radial pins 20 in a housing 22 and engaging bores in bosses 24 in the casing. These pins are all in sub stantially the same plane and constitute the sole support for the casing. A shaft 26 with rows of ‘blades 23 thereon rotates in proximity to nozzles 46 which extends inwardly from the row of noz les. This disc carries at its inner edge a sealing ring 68. The nozzles in adjacent diaphragms alternate with the rows of blades on the shaft. Casing rings I4, l6 and I8 are split on radial planes, bolts 50 holding the halves of each split ring together at its outer periphery. The planes of the splits of adjoining casing rings may be staggered as shown in Fig. 2. To maintain the sections of each split casing ring in alignment, disc 46 is provided with bores 52 which receive aligning pins 54. The bores 52 are located where the casing rings are split so that a part of each bore lies in each half of the disc forming opposed recesses which, when the ring sections are assembled, receive the pins, thus aligning the discs radially against distortions. Disc 46 may have a radially extending groove 56 in its inner edge intersecting bores 52. Each pin has an enlarged central portion ?tting within the groove and engaging opposite side walls of the groove to hold the parts of the diaphragm in axial alignment. This groove 56 may receive a peripheral ?ange 58 on sealing ring 48 in which case the ?ange will have an opening 60 to receive the enlarged por tion of each pin. As best shown in Fig. 2, the sealing ring is also split diametrically and is as sembled with its split out of alignment with the split in the casing ring further to steady the diaphragm. It is to be understood that the invention is not limited to the speci?c embodiment herein illus trated and described, but may be used in other ways without departure from its spirit as de?ned ' by the following claims. I claim: 1. Means for aligning the split sections of a turbine diaphragm, each section having opposed recesses therein, said means including a pin ?t ting in said recesses, said pin extending aXially of the diaphragm, and having an enlarged part engaging laterally with the diaphragm to hold the pin against endwise movement relative to the diaphragm and to hold the halves of the dia phragm in alignment. Housing 22 has a head 34 which forms a part 2. Means for aligning the split sections of a of the housing and supports a bearing sleeve 36 turbine diaphragm, each section having opposed for the front end of shaft 26. At the other end 50 recesses therein, said diaphragm also having a of the turbine, housing 22 has a spider 38 within groove in its inner surface with which the re which is a bearing 40 for the shaft. The spider cesses intersect, and a seal having a ?ange over has a number of legs 42 engaging radial pins 44 lapping the inner periphery of the diaphragm, in the housing, said means including a pin engaging the opposed The diaphragm 32 which is integral with each 55 recesses and having an enlarged part ?tting in 30 forming part of the diaphragms 32 integral with the casing rings. , 2,410,8i6 3 4 , ‘ aligning pin engaging the recesses in the (liai phragm and the ?ange of the seal, said ?ange having an opening to receive the pin, said pin having an enlarged portion ?tting in said groove turbine diaphragm, each section having opposed recesses therein, said diaphragm also having a en and engaging laterally with the walls of the groove for’ maintaining alignment of the dia groove in its inner surface with which the re the groove, said ?ange having an opening with which a part of the pin engages. 3. Means for aligning the split sections of a cesses intersect, and a seal having a ?ange in said groove, said means including a pin engaging the opposed recesses and having an enlarged part ?tting in the groove and engaging opposite side" walls of the groove, said ?ange having an opening with which the enlarged part of the pin engages. 4. A split turbine diaphragm having opposed sections in the adjoining edges of which are re cesses, said diaphragm also having an annular groove in its inner periphery, a seal having a ' ?ange in said groove, and an axially extending phragm. _ 5. A split turbine diaphragm having opposed sections in the adjoining edges of which are re eesses, said diaphragm also having an annular groove in its inner periphery, a seal having a flange in said groove, and an axially extending aligning pin engaging the recesses in the dia phragm and the ?ange of the seal, said seal being split and having its line of split out of alignment with the line of split of the diaphragm. VAL CRONSTEDT.