CN218151093U - Low-temperature power generation system - Google Patents
Low-temperature power generation system Download PDFInfo
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- CN218151093U CN218151093U CN202222795674.8U CN202222795674U CN218151093U CN 218151093 U CN218151093 U CN 218151093U CN 202222795674 U CN202222795674 U CN 202222795674U CN 218151093 U CN218151093 U CN 218151093U
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Abstract
The utility model discloses a low temperature power generation system, include: the turbine comprises a turbine shell and a turbine rotating shaft which is rotatably arranged in the turbine shell, and the turbine shell is provided with a high-pressure working medium air inlet and a low-pressure working medium air outlet; the generator comprises a generator shell and a rotatable generator rotating shaft arranged in the generator shell, the generator shell is fixedly and hermetically connected with a turbine shell, the turbine rotating shaft and the generator rotating shaft are coaxially arranged, the transmission connection is a power generation system main shaft, and the power generation system main shaft is supported in a space enclosed by the turbine shell and the generator shell. The utility model provides a low temperature power generation system for thoroughly become the integration by split joint with the generator and connect by two equipment, make power generation system's the degree of integrating higher, power generation system main shaft supports inside the space that is enclosed by turbine shell and generator shell, has guaranteed power generation system's reliable sealing, prevents that power generation system's organic working medium from leaking.
Description
Technical Field
The utility model relates to a low temperature power generation technical field especially relates to a low temperature power generation system.
Background
The low-temperature organic working medium power generation system mainly utilizes waste heat or waste cold with lower temperature to generate power, and because the temperature of a utilized heat source is lower, the power circulation of the power generation system is realized by depending on the low boiling point characteristic of the organic working medium. The temperature characteristics of different organic working media are different from the matching characteristics of waste heat or hot and cold temperature intervals utilized by the power generation system, and the power generation efficiency is greatly influenced by the organic working media. The low-temperature organic working medium power generation system mainly comprises equipment such as turbine expansion equipment, heat exchange equipment, organic working medium supercharging equipment (a pump or a compressor), a connecting pipeline, a power generator and the like. Static equipment in the system, such as pipelines, heat exchange equipment and the like, can realize complete sealing and zero leakage, but the sealing problem of dynamic equipment, particularly turbine expansion equipment, is difficult to solve, and the leakage cost of the organic working medium accounts for 30-40% of that of a low-temperature power generation system according to statistics.
When the power generation system works, the turbine equipment drives the generator to generate power through the rotating shaft, the bearing position of the joint of the rotating shaft and the shell is easy to leak organic working media, so that a sealing structure is arranged at the bearing position to prevent the organic working media from leaking, and the common sealing modes are as follows:
(1) Dry gas seals, i.e. dry running gas seals, belong to contactless shaft seals and are mainly used for sealing gas or liquid in rotating machines. The dry gas sealing is to form a gas film in the sealing structure to block a leakage channel of the relatively low-pressure organic working medium, but in actual operation, the phenomenon that sealing gas enters the interior of a turbine to influence the turbine power generation efficiency or the sealing gas escapes to the environment to cause environmental pollution is difficult to avoid;
(2) The mechanical seal is mainly realized by the elastic sealing ring and the lubricating oil, but the sealing ring or the lubricating oil fails due to the lower temperature of the organic working medium of the low-temperature power generation system, and finally the sealing fails or the lubricating oil enters the system to pollute the organic working medium.
In addition, the problem that two sealing modes, namely gas sealing and mechanical sealing, cannot be completely sealed, causes the low-temperature power generation system to be greatly limited when organic working media which are high in power generation, inflammable, explosive and easy to gasify are selected.
Therefore, how to solve the problem of organic working medium leakage in a low-temperature power generation system is a technical problem which needs to be solved by the technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a low temperature power generation system to solve the problem of organic working medium leakage in the low temperature power generation system.
In order to achieve the above object, the present invention provides the following technical solutions:
a cryogenic power generation system comprising:
the turbine comprises a turbine shell and a turbine rotating shaft which is rotatably arranged in the turbine shell, and the turbine shell is provided with a high-pressure working medium air inlet and a low-pressure working medium air outlet;
the generator comprises a generator shell and a generator rotating shaft which is rotatably arranged in the generator shell, the generator shell is fixedly and hermetically connected with the turbine shell, the turbine rotating shaft is coaxially arranged with the generator rotating shaft, the generator rotating shaft is in transmission connection with a main shaft of a power generation system, and the main shaft of the power generation system is supported in a space surrounded by the turbine shell and the generator shell.
Optionally, in the cryogenic power generation system, the turbine is an axial turbine, and the first end of the generator housing is hermetically connected to the first end of the turbine housing;
a turbine shaft end sealing box protruding outwards is formed at the second end of the turbine shell, and one end, far away from the generator rotating shaft, of the turbine rotating shaft extends into the turbine shaft end sealing box;
and a first generator shaft end sealing box protruding outwards is formed at the second end of the generator shell, and one end of the generator rotating shaft, which is far away from the turbine rotating shaft, extends into the first generator shaft end sealing box.
Optionally, in the cryogenic power generation system, a turbine shaft end seal box gas pipeline is further included;
one end of the turbine shaft end sealing box gas pipeline is communicated with the turbine shaft end sealing box;
and the other end of the turbine shaft end sealing box gas pipeline is communicated with the first generator shaft end sealing box or is used for being communicated with a condensation heat exchanger of a low-temperature power generation system.
Optionally, in the low-temperature power generation system, a first generator shaft end seal box gas pipeline is further included;
one end of the first generator shaft end sealing box gas pipeline is communicated with the first generator shaft end sealing box;
the other end of the first generator shaft end sealing box gas pipeline is communicated with the turbine shaft end sealing box, or is used for being communicated with a condensation heat exchanger of a low-temperature power generation system, or is communicated with the low-pressure working medium exhaust port.
Optionally, in the low-temperature power generation system, the first end of the generator housing and the first end of the turbine housing are hermetically connected through a flange.
Optionally, in the low-temperature power generation system, the high-pressure working medium inlet is disposed on a side wall of the turbine housing and is far away from one end of the generator;
the low-pressure working medium exhaust port is arranged on the side wall of the turbine shell and is positioned at one end close to the generator, and the high-pressure working medium air inlet and the low-pressure working medium exhaust port are respectively positioned at two sides of the turbine rotating shaft.
Optionally, in the cryogenic power generation system, the turbine is a radial inflow turbine, and the first end of the generator housing is sealingly connected to the first end of the turbine housing;
and a second generator shaft end sealing box protruding outwards is formed at the second end of the generator shell, and one end of the generator rotating shaft, which is far away from the turbine rotating shaft, extends into the second generator shaft end sealing box.
Optionally, in the low-temperature power generation system, a second generator shaft end seal box gas pipeline is further included;
one end of the second generator shaft end sealing box gas pipeline is communicated with the second generator shaft end sealing box;
and the other end of the second generator shaft end sealing box gas pipeline is communicated with the low-pressure working medium exhaust port or is used for being communicated with a condensation heat exchanger of a low-temperature power generation system.
Alternatively, in the low temperature power generation system, the turbine is a radial inflow turbine, and the turbines are two, respectively a high pressure turbine and a low pressure turbine, the turbine shell of the high-pressure turbine is a high-pressure turbine shell, and the turbine shell of the low-pressure turbine is a low-pressure turbine shell;
a first end of the generator housing is sealingly connected to the high pressure turbine housing and a second end of the generator housing is sealingly connected to the low pressure turbine housing;
the high-pressure working medium air inlet is arranged on the high-pressure turbine shell, the low-pressure working medium air outlet is arranged on the low-pressure turbine shell, and the high-pressure turbine shell is communicated with the low-pressure turbine shell through a working medium channel.
Alternatively, in the low-temperature power generation system, a joint of the power generation system main shaft and the turbine housing and the generator housing is sealed by a labyrinth seal structure.
The utility model provides a low temperature power generation system, including turbine and generator, turbine shell and the fixed sealing connection of generator shell for thoroughly and the generator becomes the integration by two equipment and connects by the split type connection, and turbine pivot is connected for the generating system main shaft with the transmission of generator pivot simultaneously, makes the degree of integrating of generating system higher, and the generating system main shaft supports inside the space that is enclosed by turbine shell and generator shell, has guaranteed generating system's reliable sealed, prevents that generating system's organic working medium from leaking.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a low-temperature power generation system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a low-temperature power generation system provided in the second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a low-temperature power generation system provided by the third embodiment of the present invention.
The meaning of the various reference numerals in figures 1 to 3 is as follows:
100 is a turbine, 101 is a turbine shell, 102 is a turbine rotating shaft, 103 is a high-pressure working medium air inlet, 104 is a low-pressure working medium air outlet, 105 is a turbine shaft end sealing box, 106 is a turbine shaft end sealing box gas pipeline, 107 is a high-pressure turbine, 108 is a low-pressure turbine, and 109 is a working medium channel;
200 is a generator, 201 is a generator shell, 202 is a generator rotating shaft, 203 is a first generator shaft end sealing box, 204 is a first generator shaft end sealing box gas pipeline, 205 is a second generator shaft end sealing box, and 206 is a second generator shaft end sealing box gas pipeline.
Detailed Description
The core of the utility model lies in providing a low temperature power generation system to solve the problem that organic working medium leaked in the low temperature power generation system.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-3, embodiments of the present invention disclose a cryogenic power generation system comprising a turbine 100 and a generator 200.
As shown in fig. 1, the turbine 100 includes a turbine casing 101 and a turbine rotating shaft 102 rotatably disposed in the turbine casing 101, the turbine casing 101 is provided with a high-pressure working medium inlet 103 and a low-pressure working medium outlet 104, a rotating element of the turbine 100 is a turbine moving blade disposed on the turbine rotating shaft 102, high-pressure organic working medium gas enters the turbine 100 from the high-pressure working medium inlet 103, the turbine moving blade is driven to rotate, thereby driving the turbine rotating shaft 102 to rotate, energy contained in the high-pressure organic working medium gas is converted into mechanical work, pressure of the high-pressure organic working medium gas is reduced after work is performed, and the high-pressure organic working medium gas is discharged from the low-pressure working medium outlet 104. It should be noted that the turbine 100 may be an axial turbine or a radial turbine, and the specific type is not limited herein. For convenience of distinction, the organic working medium gas at the high-pressure working medium gas inlet 103 is used as the high-pressure organic working medium gas, and the gas at the low-pressure working medium gas outlet 104 is used as the low-pressure organic working medium gas for description.
The generator 200 comprises a generator housing 201 and a generator rotating shaft 202 rotatably arranged in the generator housing 201, the turbine rotating shaft 102 and the generator rotating shaft 202 are coaxially arranged and are in transmission connection to form a main shaft of a power generation system, the turbine rotating shaft 102 rotates to drive the generator rotating shaft 202 to rotate, and the generator 200 outputs electric power outwards. It will be understood by those skilled in the art that the turbine rotating shaft 102 and the generator rotating shaft 202 may be connected by a coupling or a clutch, or the turbine rotating shaft 102 and the generator rotating shaft 202 are the same shaft, and the specific connection mode is selected according to the actual situation. The generator housing 201 is fixedly and hermetically connected with the turbine housing 101, so that the turbine 100 and the generator 200 are connected into a whole, and the main shaft of the power generation system is supported in the space enclosed by the turbine housing 101 and the generator housing 201.
The utility model discloses a low temperature power generation system, turbine housing 101 and the fixed sealing connection of generator housing 201 for two equipment of turbine 100 and generator 200 become the integration by the components of a whole that can function independently connection and connect, turbine pivot 102 is connected for the generating system main shaft with generator pivot 202 transmission simultaneously, make the degree of integrating of generating system higher, the generating system main shaft supports inside the space that is enclosed by turbine housing 101 and generator housing 201, the reliable sealing of generating system has been guaranteed, prevent that the organic working medium of generating system from leaking.
It should be noted that, bearings are arranged at the joints of the main shaft of the power generation system, the turbine housing 101 and the generator housing 201, and the bearings are arranged to change sliding friction during rotation of the main shaft of the power generation system into rolling friction, so that friction and abrasion of the main shaft of the power generation system are reduced, abrasion of the turbine housing 101 and the generator housing 201 is reduced, and the service life of the main shaft of the power generation system is prolonged.
As shown in fig. 1, in an embodiment of the present invention, the turbine 100 is an axial turbine, i.e. the flow direction of the organic working medium gas is parallel to the turbine rotation axis 102. The first end of the generator housing 201 is hermetically connected to the first end of the turbine housing 101, and it can be understood by those skilled in the art that the connection mode of the first end of the generator housing 201 and the first end of the turbine housing 101 may be flange connection, welding connection, bolt connection, and the like, and the specific connection mode may be selected according to actual situations.
The second end of turbine shell 101 is formed with outside convex turbine axle head seal box 105, and the one end that generator shaft 202 was kept away from to turbine shaft 102 stretches into in turbine axle head seal box 105, and turbine shaft 102 sets up first bearing with turbine shell 101's junction in turbine axle head seal box 105, in order to reduce high-pressure organic working medium gas and enter into turbine axle head seal box 105 through first bearing position, sets up seal structure in first bearing position, and a small amount of high-pressure organic working medium gas of permission passes through, for making seal structure need not the lubrication and maintain simply, the utility model discloses a low temperature power generation system, seal structure adopt labyrinth seal mode, and what technical field personnel in the art can understand, labyrinth seal has the polytype, for example zigzag type, smooth type etc. specific type is selected according to actual conditions can. A small amount of high-pressure organic working medium gas enters the turbine shaft end sealing box 105 and can lubricate the first bearing.
A second bearing is arranged at the connecting position of the generator rotating shaft 202 and the turbine shell 101, and in order to reduce the entering of low-pressure organic working medium gas into the generator shell 201 from the position of the second bearing, a sealing structure is arranged at the position of the second bearing, a small amount of low-pressure organic working medium gas is allowed to pass through, and a small amount of low-pressure organic working medium gas enters the generator 200 through the sealing structure, so that the lubricating effect on the second bearing can be achieved. It should be noted that, the second bearing may not be provided with a sealing structure, so that the turbine housing 101 and the generator housing 201 are in a communication state, and the low-pressure organic working medium gas in the turbine housing 101 is allowed to enter the generator housing 201, as long as the organic working medium gas can be prevented from escaping from the turbine housing 101 and the generator housing 201.
A first generator shaft end sealing box 203 protruding outwards is formed at the second end of the generator shell 201, one end of the generator rotating shaft 202, far away from the turbine rotating shaft 102, extends into the first generator shaft end sealing box 203, a third bearing is arranged at the joint of the generator rotating shaft 202 and the generator shell 201 in the first generator shaft end sealing box 203, in order to reduce the phenomenon that low-pressure organic working medium gas enters the first generator shaft end sealing box 203 through the third bearing, a sealing structure is arranged at the third bearing position to allow a small amount of low-pressure organic working medium gas to pass through, a small amount of low-pressure organic working medium gas enters the first generator shaft end sealing box 203 through the third bearing, the third bearing can be lubricated, and then the organic working medium gas enters the first generator shaft end sealing box 203. Because the organic working medium gas in the low-temperature power generation system has lower temperature, and a small amount of low-pressure organic working medium gas flows to the second end of the generator shell 201 from the first end of the generator shell 201, the generator 200 can be cooled, and a cooling system of the generator 200 does not need to be additionally arranged.
The utility model discloses a low temperature power generation system utilizes organic working medium gas to lubricate the bearing, need not to be equipped with special lubricating oil system, has avoided lubricating oil system and organic working medium to mix, leads to the problem of generating power decline influence system operation security even. Meanwhile, one end of the turbine rotating shaft 102, which is far away from the generator rotating shaft 202, extends into the turbine shaft end sealing box 105, and one end of the generator rotating shaft 202, which is far away from the turbine rotating shaft 102, extends into the first generator shaft end sealing box 203, so that the whole main shaft of the power generation system is positioned in a space enclosed by the turbine shell 101 and the generator shell 201, and organic working medium gas flows in the space enclosed by the turbine shell 101 and the generator shell 201, thereby preventing organic working medium leakage. The generator 200 is cooled by the organic working medium gas, and a cooling system of the generator 200 is not required to be additionally arranged.
In order to effectively utilize the high-pressure organic working medium gas in the turbine shaft end sealing box 105 to circulate in the power generation system, as shown in fig. 1, in an embodiment of the present invention, the present invention further includes a turbine shaft end sealing box gas pipeline 106, one end of the turbine shaft end sealing box gas pipeline 106 is communicated with the turbine shaft end sealing box 105, the other end is communicated with the first generator shaft end sealing box 203, namely, the high-pressure organic working medium gas enters the first generator shaft end sealing box 203 from the turbine shaft end sealing box 105 through the turbine shaft end sealing box gas pipeline 106, the high-pressure organic working medium gas enters the generator 200 through the third bearing, flows to the low-pressure end of the turbine 100, and is mixed with the low-pressure organic working medium gas in the turbine 100, and is discharged from the low-pressure working medium exhaust port 104, and flows to the low-pressure end from the high-pressure end, and circulates in the turbine 100 and the generator 200, so that the high-pressure organic working medium gas in the turbine shaft end sealing box 105 is effectively utilized.
In another embodiment of the present invention, one end of the turbine shaft end sealing box gas pipeline 106 is communicated with the turbine shaft end sealing box 105, and the other end is used for communicating with the condensation heat exchanger of the low temperature power generation system, i.e. the high pressure organic working medium gas enters the condensation heat exchanger from the turbine shaft end sealing box 105 through the turbine shaft end sealing box gas pipeline 106 for cooling, and then circulates in the low temperature power generation system, so that the high pressure organic working medium gas in the turbine shaft end sealing box 105 is effectively utilized.
As shown in fig. 1, in another embodiment of the present invention, a first generator shaft end sealing box gas pipeline 204 is further included, one end of the first generator shaft end sealing box gas pipeline 204 is communicated with the first generator shaft end sealing box 203, the other end is communicated with the turbine shaft end sealing box 105, the high-pressure organic working medium gas enters the first generator shaft end sealing box 203 from the turbine shaft end sealing box 105 through the first generator shaft end sealing box gas pipeline 204, the high-pressure organic working medium gas enters the generator 200 through the third bearing, flows to the low-pressure end of the turbine 100, and is mixed with the low-pressure organic working medium gas in the turbine 100, and is discharged from the low-pressure working medium exhaust port 104, and enters the power generation system for circulation, and cools the generator 200 at the same time, so that the high-pressure organic working medium gas in the turbine shaft end sealing box 105 is effectively utilized.
In order to effectively utilize the organic working medium of low pressure in the first generator shaft end seal box 203 the utility model relates to an in the embodiment, the one end and the first generator shaft end seal box 203 intercommunication of first generator shaft end seal box gas pipeline 204, the other end is used for the condensation heat exchanger intercommunication with low temperature power generation system, the organic working medium gas of low pressure gets into the condensation heat exchanger from first generator shaft end seal box 203 through first generator shaft end seal box gas pipeline 204 and cools off promptly, later at low temperature power generation system inner loop for the organic working medium gas of low pressure in the first generator shaft end seal box 203 has obtained effective utilization.
In another embodiment of the present invention, the first generator shaft end seal box gas pipe 204 has one end communicating with the first generator shaft end seal box 203 and the other end communicating with the low pressure working medium gas outlet 104. If the pressure of the low-pressure organic working medium gas in the first generator shaft end sealing box 203 is higher than the pressure of the organic working medium gas in the low-pressure working medium gas outlet 104, the low-pressure organic working medium gas in the first generator shaft end sealing box 203 enters the low-pressure working medium gas outlet 104 through the first generator shaft end sealing box gas pipeline 204 after being communicated, is mixed with the low-pressure organic working medium gas in the turbine 100, is discharged from the low-pressure working medium gas outlet 104, and enters a power generation system for circulation, so that the low-pressure organic working medium gas in the first generator shaft end sealing box 203 is effectively utilized. It can be understood by those skilled in the art that when the pressure of the low-pressure organic working medium gas in the first generator shaft end sealing box 203 is lower than the pressure of the organic working medium gas in the low-pressure working medium exhaust port 104, the organic working medium gas in the low-pressure working medium exhaust port 104 enters the first generator shaft end sealing box 203 through the first generator shaft end sealing box gas pipeline 204 to cool the generator 200, and of course, a position where the pressure is higher than the pressure of the low-pressure organic working medium gas in the first generator shaft end sealing box 203, for example, a mode of connecting a circulating pump in a power generation system with the first generator shaft end sealing box gas pipeline 204, may also be adopted.
As shown in fig. 1, in order to facilitate the connection between the first end of the generator casing 201 and the first end of the turbine casing 101, a flange seal connection is adopted in an embodiment of the present invention.
The utility model discloses a low temperature power generation system of axial-flow turbine, as shown in fig. 1, high pressure working medium air inlet 103 sets up on turbine casing 101's lateral wall and keeps away from the one end of generator 200, and low pressure working medium gas vent 104 sets up on turbine casing 101's lateral wall, and is located the one end that is close to generator 200, and high pressure working medium air inlet 103 and low pressure working medium gas vent 104 are located the both sides of turbine pivot 102 respectively. Namely, the high-pressure organic working medium gas enters the turbine 100 from the high-pressure working medium gas inlet 103, the pressure is reduced after expansion work, the temperature is reduced, and the high-pressure organic working medium gas is discharged from the low-pressure working medium gas outlet 104.
As shown in fig. 2, in an embodiment of the present invention, the turbine 100 is a radial inflow turbine, the first end of the generator casing 201 is hermetically connected to the first end of the turbine casing 101, and it can be understood by those skilled in the art that the connection manner of the first end of the generator casing 201 and the first end of the turbine casing 101 may be flange connection, welded connection, bolt connection, and the like, and the specific connection manner may be selected according to actual situations.
The second end of the generator housing 201 is formed with a second generator shaft end sealing box 205 protruding outwards, and one end of the generator rotating shaft 202 away from the turbine rotating shaft 102 extends into the second generator shaft end sealing box 205, so that the whole main shaft of the power generation system is located in a space enclosed by the turbine housing 101 and the generator housing 201, and the organic working medium gas flows in the space enclosed by the turbine housing 101 and the generator housing 201, thereby preventing the organic working medium from leaking.
A fourth bearing is arranged at the joint of the turbine rotating shaft 102 and the generator shell 201, and in order to prevent low-pressure organic working medium gas from entering the generator shell 201 through the fourth bearing, a sealing structure is arranged at the position of the fourth bearing and allows a small amount of low-pressure organic working medium gas to pass through. A small amount of low-pressure organic working medium gas enters the generator shell 201 through the sealing structure at the position of the fourth bearing, and can lubricate the fourth bearing.
The fifth bearing is arranged at the joint of the generator rotating shaft 202 and the generator shell 201 in the second generator shaft end sealing box 205, in order to reduce the possibility that low-pressure organic working medium gas in the generator 200 enters the second generator shaft end sealing box 205 through the fifth bearing position, a sealing structure is arranged at the fifth bearing position, a small amount of organic working medium gas is allowed to pass through, the small amount of organic working medium gas enters the second generator shaft end sealing box 205, the lubricating effect on the fifth bearing can be achieved, and meanwhile the small amount of organic working medium gas can cool the generator 200.
In order to effectively utilize the organic working medium gas of low pressure in the second generator shaft end seal box 205, in an embodiment of the utility model, the one end and the second generator shaft end seal box 205 intercommunication of second generator shaft end seal box gas pipeline 206, the other end and low pressure working medium gas vent 104 intercommunication. If the pressure of the low-pressure organic working medium gas in the second generator shaft end sealing box 205 is higher than the pressure of the organic working medium gas in the low-pressure working medium exhaust port 104, the low-pressure organic working medium gas in the second generator shaft end sealing box 205 enters the low-pressure working medium exhaust port 104 through the second generator shaft end sealing box gas pipeline 206 after being communicated, is mixed with the low-pressure organic working medium gas in the turbine 100, is exhausted from the low-pressure working medium exhaust port 104, and enters a power generation system for circulation, so that the low-pressure organic working medium gas in the second generator shaft end sealing box 205 is effectively utilized. It will be understood by those skilled in the art that when the pressure of the low-pressure organic working medium gas in the second generator shaft end seal box 205 is lower than the pressure of the organic working medium gas in the low-pressure working medium exhaust port 104, the organic working medium gas in the low-pressure working medium exhaust port 104 enters the second generator shaft end seal box 205 through the second generator shaft end seal box gas pipe 206 to cool the generator 200. Of course, a position higher than the pressure of the low-pressure organic working medium gas in the second generator shaft end sealing box 205 may also be adopted, for example, a circulation pump in the power generation system is connected with the second generator shaft end sealing box gas pipeline 206.
The utility model discloses in another embodiment, the one end and the second generator axle head seal box 205 intercommunication of second generator axle head seal box gas piping 206, the other end is used for communicating with the condensation heat exchanger of low temperature power generation system, and organic working medium gas of low pressure gets into the condensation heat exchanger from second generator axle head seal box 205 through second generator axle head seal box gas piping 206 and cools off promptly, later at low temperature power generation system inner loop for organic working medium gas of low pressure in the second generator axle head seal box 205 has obtained effective utilization.
As shown in fig. 3, in an embodiment of the present invention, the turbine 100 is a radial inflow turbine, and the turbines 100 are two, i.e., a high pressure turbine 107 and a low pressure turbine 108, respectively, the turbine casing of the high pressure turbine 107 is a high pressure turbine casing, and the turbine casing of the low pressure turbine 108 is a low pressure turbine casing. The first end of the generator housing 201 is sealingly connected to the high-pressure turbine housing and the second end of the generator housing 201 is sealingly connected to the low-pressure turbine housing, i.e. the generator 200 is located between the high-pressure turbine 107 and the low-pressure turbine 108. The high-pressure working medium air inlet 103 is arranged on the high-pressure turbine shell, the low-pressure working medium air outlet 104 is arranged on the low-pressure turbine shell, and the high-pressure turbine shell is communicated with the low-pressure turbine shell through a working medium channel 109. The high-pressure organic working medium gas entering the high-pressure turbine 107 expands in the high-pressure turbine 107 to do work, the pressure is reduced after the expansion to do work, the high-pressure organic working medium gas enters the low-pressure turbine 108 through the working medium channel 109 to continue to do work, the pressure is further reduced after the work is done, and the high-pressure organic working medium gas is discharged from the low-pressure working medium gas outlet 104 and enters the power generation system to circulate.
The joint between the turbine shaft 102 and the generator housing 201 is provided with a sixth bearing and a seventh bearing, for convenience of description, the sixth bearing refers to the bearing at the first end of the generator housing, and the seventh bearing refers to the bearing at the second end of the generator housing. In order to prevent the high-pressure organic working medium gas in the high-pressure turbine 107 from entering the generator 200 through the sixth bearing, a sealing structure is arranged at the sixth bearing, only a small amount of organic working medium gas enters the generator 200 through the sealing structure and the sixth bearing, the sixth bearing is lubricated at the sixth bearing, and meanwhile, the small amount of organic working medium gas passes through the generator 200 to cool the generator. In order to prevent the low-pressure organic working medium gas in the low-pressure turbine 108 from entering the generator 200 through the seventh bearing, a sealing structure is arranged at the seventh bearing, because a small amount of organic working medium gas entering the generator 200 from the high-pressure turbine 107 is high-pressure organic working medium gas, the high-pressure organic working medium gas enters the low-pressure turbine 108 through the sealing structure at the seventh bearing position, is mixed with the low-pressure organic working medium gas in the low-pressure turbine 108, is discharged from the low-pressure working medium gas outlet 104 and then enters the power generation system for circulation, and meanwhile, the seventh bearing is lubricated.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising a … …" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims.
Claims (10)
1. A cryogenic power generation system, comprising:
the turbine (100) comprises a turbine shell (101) and a turbine rotating shaft (102) which is rotatably arranged in the turbine shell (101), wherein the turbine shell (101) is provided with a high-pressure working medium air inlet (103) and a low-pressure working medium air outlet (104);
the generator (200) comprises a generator shell (201) and a generator rotating shaft (202) which is rotatably arranged in the generator shell (201), the generator shell (201) is fixedly and hermetically connected with the turbine shell (101), the turbine rotating shaft (102) and the generator rotating shaft (202) are coaxially arranged and are in transmission connection with a main shaft of a power generation system, and the main shaft of the power generation system is supported in a space surrounded by the turbine shell (101) and the generator shell (201).
2. A cryogenic power generation system according to claim 1, wherein the turbine (100) is an axial flow turbine, the first end of the generator housing (201) is sealingly connected to the first end of the turbine housing (101);
a turbine shaft end sealing box (105) protruding outwards is formed at the second end of the turbine shell (101), and one end, away from the generator rotating shaft (202), of the turbine rotating shaft (102) extends into the turbine shaft end sealing box (105);
the second end of the generator shell (201) is provided with a first generator shaft end sealing box (203) protruding outwards, and one end, away from the turbine rotating shaft (102), of the generator rotating shaft (202) extends into the first generator shaft end sealing box (203).
3. The cryogenic power generation system of claim 2, further comprising a turbine shaft end seal box gas conduit (106);
one end of the turbine shaft end sealing box gas pipeline (106) is communicated with the turbine shaft end sealing box (105);
the other end of the turbine shaft end sealing box gas pipeline (106) is communicated with the first generator shaft end sealing box (203) or is used for being communicated with a condensation heat exchanger of a low-temperature power generation system.
4. A cryogenic power generation system according to claim 2, further comprising a first generator shaft end seal box gas conduit (204);
one end of the first generator shaft end seal box gas pipeline (204) is communicated with the first generator shaft end seal box (203);
the other end of the first generator shaft end sealing box gas pipeline (204) is communicated with the turbine shaft end sealing box (105), or is used for being communicated with a condensation heat exchanger of a low-temperature power generation system, or is communicated with the low-pressure working medium exhaust port (104).
5. A cryogenic power generation system according to claim 2, wherein the first end of the generator housing (201) is flange sealed to the first end of the turbine housing (101).
6. A cryogenic power generation system according to any of claims 2 to 5, wherein the high pressure working fluid inlet (103) is provided on the side wall of the turbine housing (101) and at an end remote from the generator (200);
the low-pressure working medium exhaust port (104) is arranged on the side wall of the turbine shell (101) and is positioned at one end close to the generator (200), and the high-pressure working medium air inlet (103) and the low-pressure working medium exhaust port (104) are respectively positioned at two sides of the turbine rotating shaft (102).
7. The cryogenic power generation system of claim 1, wherein the turbine (100) is a radial inflow turbine, the first end of the generator housing (201) being sealingly connected to the first end of the turbine housing (101);
and a second generator shaft end sealing box (205) protruding outwards is formed at the second end of the generator shell (201), and one end, far away from the turbine rotating shaft (102), of the generator rotating shaft (202) extends into the second generator shaft end sealing box (205).
8. The cryogenic power generation system of claim 7, further comprising a second generator shaft end seal box gas conduit (206);
one end of the second generator shaft end sealing box gas pipeline (206) is communicated with the second generator shaft end sealing box (205);
the other end of the second generator shaft end sealing box gas pipeline (206) is communicated with the low-pressure working medium exhaust port (104) or is used for being communicated with a condensation heat exchanger of a low-temperature power generation system.
9. The cryogenic power generation system of claim 1, wherein the turbine (100) is a radial inflow turbine and the turbines (100) are two, respectively a high pressure turbine (107) and a low pressure turbine (108), the turbine shell of the high pressure turbine (107) being a high pressure turbine shell and the turbine shell of the low pressure turbine (108) being a low pressure turbine shell;
a first end of the generator housing (201) is hermetically connected to the high pressure turbine housing, and a second end of the generator housing (201) is hermetically connected to the low pressure turbine housing;
the high-pressure working medium air inlet (103) is arranged on the high-pressure turbine shell, the low-pressure working medium air outlet (104) is arranged on the low-pressure turbine shell, and the high-pressure turbine shell is communicated with the low-pressure turbine shell through a working medium channel (109).
10. A cryogenic power generation system according to any of claims 1 to 5, 7 to 9, wherein the junction of the power generation system main shaft with the turbine housing (101) and the generator housing (201) is sealed by a labyrinth seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222795674.8U CN218151093U (en) | 2022-10-24 | 2022-10-24 | Low-temperature power generation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222795674.8U CN218151093U (en) | 2022-10-24 | 2022-10-24 | Low-temperature power generation system |
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| Publication Number | Publication Date |
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| CN218151093U true CN218151093U (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222795674.8U Active CN218151093U (en) | 2022-10-24 | 2022-10-24 | Low-temperature power generation system |
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| CN (1) | CN218151093U (en) |
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