Rotary expansible chamber devices – With mechanical sealing
Reexamination Certificate
2000-03-09
2001-09-04
Denion, Thomas (Department: 3748)
Rotary expansible chamber devices
With mechanical sealing
C418S201100
Reexamination Certificate
active
06283739
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to the field of mechanical engineering, in particular to steam engines of unvolumetric displacement, namely to steam screw engines intended for transformation of steam energy into mechanical energy.
DESCRIPTION OF THE PRIOR ART
A known steam screw engine (SU, A, 1838632), comprises a casing, inside which there is a high pressure chamber with drive and driven screws in a linkage placed therein, an output reducer and a synchronizing transmission, the output reducer being connected to the output shaft of the engine, and and to the drive screw, the transmission—providing synchronization of rotation of the screws, which are placed in bearing supports.
Also known is a steam screw engine (SU, AC, 1146482), comprising a casing, with drive and driven screws in a linkage placed therein, the shafts of which are placed in bearings, output and synchronizing transmissions, by means of the first of which the drive screw is connected to the output shaft, and by means of the second, the drive and driven screws are connected together inlet and outlet branch pipes for feed and discharge of a working medium, in particular steam, a cylinder for compensation of axial propulsion forces comprising a piston connected to the shaft of the drive screw, and a greasing system of the bearings and the transmissions, the output and synchronizing transmissions being located on different sides of the screws, the branch pipe and cylinder being connected to a source a steam.
A disadvantage the known devices is the rather low efficiency due to losses in the bearing because of a penetration therein of stream from area of high pressure and the presence of axial and radial overtension from operation of the screws. Besides, the known engines have short service life in view of the increased wear of the bearing and transmissions.
SUMMARY OF THE INVENTION
An object of the present invention is to create a steam screw engine possessing increased efficiency while increasing its motor-resource by improving the seals during operation and technological clearances between the screws and of more effective utilization of the steam, and equilibration of forces acting on the bearings developed by the drive.
This object is achieved by a steam screw engine comprising a casing drive and driven screws in a linkage in said casing shafts of said screws placed in bearing nodes, output and synchronizing transmissions, by means of the first of which the drive screw is connected to the output shaft, and by means of the second, the drive and driven screws are connected together inlet and outlet branch pipes for feed and discharge of a working medium, in particular steam, a cylinder for compensation of axial forces from the screws including a piston connected to the shaft of the drive screw, and a greasing system of the bearings and transmissions, the output and synchronizing transmissions being located on different sides of the screws, and the inlet branch pipe and cylinder being connected with a source of steam, additionally provided are device for an equilibration of forces in bearing nodes originating on the part of screws, both separators a steam and oil placed from shafts between screws and the bearings the device for equilibration of forces in the bearing compressor space formed between the shaft and the casing and connected on one side with the source a steam, and on the other side, —via throttling channels-with the outlet branch pipe, and the space is made in the casing on both sides of the screws and is placed along a lateral area of the shaft at a site located opposite a direction of forces from the screws, the separators of steam and oil included means for pressure discharge and of steam oil.
It is expedient, that each separator of steam and oil is made in the form of seal rings, between which the units of a vending of steam and/or oil are located.
It is preferable, that each means for discharge of steam oil is made in the form of, at least, two spaces, each of which is located between adjacent seal rings, and the first space—a discharge one, is located on the side of a bearing, is connected by the channel connected to the atmosphere, and the second space is located on the side of the screw, is connected by means of the channel connected to the outlet branch pipe.
It is expedient, that the means for discharge of the steam and oil is supplied with a mechanism for forced discharge of steam and oil.
It is expedient, that the mechanism for forced discharge of steam and oil is made in the form of a diaphragm, located between adjacent seal rings with chambers one of which at the side of a the bearings is, connected with the channel connected to the hydraulic reservoir of the greasing system, and the second clearance of which located on the side of the screw, is connected with the channel connected to the atmosphere, on a surface of the shaft or the diaphragm at the site of their interaction with the opposing screw, which inputs are connected with the atmosphere, and outputs with an appropriate clearance, a helical groove connected with a chamber which is connected with the hydraulic reservoir, is executed with a direction appropriate to a direction of the drive screw, with the possibility of a support of a forced discharge of penetrated oil to the hydraulic reservoir.
REFERENCES:
patent: 598906 (1898-02-01), Carnahan et al.
patent: 4153395 (1979-05-01), O'Neil
patent: 4329126 (1982-05-01), Nishimura
patent: 4487563 (1984-12-01), Mori et al.
patent: 4709682 (1987-12-01), Kato
patent: 4781553 (1988-11-01), Nomura et al.
patent: 4984974 (1991-01-01), Naya et al.
patent: 4993930 (1991-02-01), Uchida et al.
patent: 5228298 (1993-07-01), Kun et al.
patent: 5348456 (1994-09-01), Kun et al.
patent: 3326910 (1984-03-01), None
patent: 1026165 (1966-04-01), None
patent: 94005799 (1995-10-01), None
patent: 94002921 (1996-01-01), None
patent: 1838632 (1993-08-01), None
patent: 94027050 (1994-11-01), None
Berezin Sergei Romanovich
Noskov Anatoly Nikolaevich
Scheglov Alexandr Georgievich
Vedaiko Viktor Iosifovich
Denion Thomas
IEC L.L.C.
Ladas and Parry
Trien Theresa
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