CN211666785U - Rotating mechanical shafting structure based on supercritical carbon dioxide - Google Patents
Rotating mechanical shafting structure based on supercritical carbon dioxide Download PDFInfo
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- CN211666785U CN211666785U CN202020369422.7U CN202020369422U CN211666785U CN 211666785 U CN211666785 U CN 211666785U CN 202020369422 U CN202020369422 U CN 202020369422U CN 211666785 U CN211666785 U CN 211666785U
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Abstract
The application relates to the technical field of power generation of impeller mechanical equipment, in particular to a rotating mechanical shafting structure based on supercritical carbon dioxide, wherein in the shafting structure, a first medium compression path and a second medium compression path are arranged in parallel and are provided with the same input end and the same output end; the heat exchange path comprises a first heat exchange path and a second heat exchange path; the output end of the first heat exchange path is communicated with the same input end; the same output end is communicated with the input end of the second heat exchange path; the output end of the second heat exchange path is communicated with the input end of the acting path; the output end of the acting path is communicated with the input end of the first heat exchange path; the first medium compression path is provided with a first compressor, the second medium compression path is provided with a second compressor, and the two compressors are coaxially arranged; the heat exchange path is provided with a turbine which is connected with the coaxial structures of the two compressors through a speed changing device. The system has high operation efficiency and operates more stably.
Description
Technical Field
The application relates to the technical field of impeller mechanical equipment, in particular to a rotating mechanical shafting structure based on supercritical carbon dioxide.
Background
At present, the supercritical carbon dioxide Brayton cycle is used as a leading-edge power generation technology, and has wide engineering application prospects in the fields of thermal power, nuclear power, ship power, solar power generation and the like. Wherein, the turbine and the compressor are impeller mechanical equipment with a relatively central whole circulation. At present, aiming at the problems that the turbo machine which takes supercritical carbon dioxide as working medium is mainly designed, a turbine and a compressor are difficult to simultaneously operate in an optimal rotating speed range, in addition, the axial thrust of a main shaft of the compressor is large, and the system is unstable and unsafe to operate.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a rotating mechanical shafting structure based on supercritical carbon dioxide, which solves the technical problems that a turbine and a compressor in the prior art are difficult to simultaneously operate within an optimal rotating speed range, and in addition, the axial thrust of a main shaft of the compressor is large, and the system is unstable and unsafe to operate to a certain extent.
The application provides a based on super supercritical carbon dioxide rotating machinery shafting structure includes: the heat exchanger comprises a heat exchange path, a first medium compression path, a second medium compression path, a work applying path and a speed changing device;
the first medium compression path and the second medium compression path are arranged in parallel and have the same input end and the same output end; the heat exchange path comprises a first heat exchange path and a second heat exchange path;
the output end of the first heat exchange path is communicated with the same input end; the same output end is communicated with the input end of the second heat exchange path; the output end of the second heat exchange path is communicated with the input end of the working path; the output end of the working path is communicated with the input end of the first heat exchange path;
the first medium compression path is provided with a first compressor, the second medium compression path is provided with a second compressor, and the first compressor and the second compressor are coaxially arranged; the heat exchange path is provided with a turbine, and the turbine is connected with a common rotating shaft of the first compressor and the second compressor through the speed changing device.
In the above technical solution, further, the first compressor and the second compressor are symmetrically arranged, and a same first sealing structure is arranged between the first compressor and the second compressor.
In any of the above technical solutions, further, the ends of the first compressor and the second compressor facing away from each other are provided with second sealing structures.
In any of the above technical solutions, further, both end portions of the turbine are provided with third seal structures.
In any of the above technical solutions, further, the first sealing structure, the second sealing structure, and the third sealing structure are any one of labyrinth seal, carbon ring seal, and dry gas seal, or any combination of labyrinth seal, carbon ring seal, and dry gas seal.
In any of the above technical solutions, further, the acting path is provided with a heat source and a turbine; wherein the input end of the heat source is communicated with the output end of the second heat exchange path;
and the output end of the heat source is communicated with the input end of the turbine.
In any of the above technical solutions, further, the heat exchange path is provided with a high-temperature heat regenerator and a low-temperature heat regenerator;
the low-pressure input end of the high-temperature regenerator is communicated with the output end of the turbine, the low-pressure output end of the high-temperature regenerator is communicated with the low-pressure input end of the low-temperature regenerator, and the low-pressure output end of the low-temperature regenerator is communicated with the same input end of the first medium compression path and the second medium compression path to form the first heat exchange path;
an input end of the first compressor is communicated with the same input end of the first medium compression path and the second medium compression path, and an output end of the first compressor is communicated with the same output end of the first medium compression path and the second medium compression path to form a first medium compression path;
the input end of the second compressor is communicated with the same input end of the first medium compression path and the second medium compression path, and the output end of the second compressor is communicated with the high-pressure input end of the low-temperature heat regenerator to form the second medium compression path;
the high-pressure output end of the low-temperature heat regenerator and the output end of the first compressor are communicated with the same output end of the first medium compression path and the same output end of the second medium compression path, and the same output end of the low-temperature heat regenerator and the same output end of the first compressor are communicated with the high-pressure input end of the high-temperature heat regenerator to form the second heat exchange path.
In any of the above technical solutions, further, the second medium compression path is further provided with a cooler, an input end of the cooler is communicated with the same input end of the first medium compression path and the second medium compression path, and an output end of the cooler is communicated with an input end of the second compressor.
In any of the above technical solutions, further, the rotating mechanical shafting structure based on supercritical carbon dioxide further includes a driving device and a power generation device;
the driving device, the power generation device and the speed change device are sequentially connected, and a torque converter is arranged between the driving device and the power generation device.
In any of the above technical solutions, further, the end portions of the first compressor and the second compressor facing away from each other are provided with a first radial bearing, and a coaxial structure formed by the first compressor and the second compressor is provided with a first thrust bearing;
and second radial bearings are arranged at two end parts of the turbine, and second thrust bearings are arranged close to the inlet side of the turbine.
The application also provides a working method based on the supercritical carbon dioxide rotating mechanical shafting structure, which comprises the following steps:
the working medium discharged by the turbine is discharged by the high-temperature heat regenerator and the low-temperature heat regenerator in sequence, and the working medium discharged by heat release is divided into two paths;
one path of working medium is compressed to a high-pressure state by the first compressor, the other path of working medium is cooled by the cooler, then is compressed to a high-pressure state by the second compressor, then is heated by the low-temperature heat regenerator and is mixed with the previous path of working medium in the high-pressure state, the mixed working medium absorbs heat through the high-temperature heat regenerator and the heat source in sequence, and finally flows into the turbine to do work, and the working medium discharged by the turbine repeats the process.
Compared with the prior art, the beneficial effect of this application is:
in the rotary mechanical shafting structure based on supercritical carbon dioxide that this application provided, the non-coaxial setting is realized through speed change gear to the common pivot of first compressor and second compressor and the main shaft of turbine, under speed change gear's coordination for turbine and compressor can operate on respective best rotational speed, have improved the pneumatic efficiency of this system, thereby promote whole supercritical carbon dioxide circulation system's performance and economic benefits.
In addition, when the compressor admits air, the compression working medium can produce great axial thrust to the pivot, because first compressor and the coaxial symmetry setting of second compressor for the air inlet of two compressors sets up relatively or back to back, and then makes the axial thrust that the common pivot of two compressors received offset, and then makes two compressors operation more stable, has increased the security and the stability of system operation promptly.
The application provides a working method based on supercritical carbon dioxide rotating machinery shafting structure, be used for the aforesaid based on supercritical carbon dioxide rotating machinery shafting structure, therefore, through the form of working medium reposition of redundant personnel, reduced the risk of the inside heat transfer difference in temperature undersize of low temperature regenerator, promoted the stability of entire system operation, also promoted the efficiency of entire system circulation simultaneously.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a system based on a supercritical carbon dioxide rotating mechanical shafting structure according to an embodiment of the present disclosure;
fig. 2 is a schematic view of a rotating mechanical shafting structure based on supercritical carbon dioxide according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart of a working method based on a supercritical carbon dioxide rotating mechanical shafting structure according to an embodiment of the present application.
Reference numerals:
1-a power generation device, 2-a speed change device, 3-a turbine, 4-a high temperature regenerator, 5-a low temperature regenerator, 6-a first compressor, 7-a cooler, 8-a second compressor, 9-a heat source, 10-a drive, 11-a torque converter, 12-a first radial bearing, 13-a first thrust bearing, 14-a first sealing structure, 15-a second sealing structure, 16-a second radial bearing, 17-a second thrust bearing, 18-a third sealing structure, 100-a heat exchange path, 101-a first heat exchange path, 102-a second heat exchange path, 200-a first medium compression path, 300-a second medium compression path, 400-a work path.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments.
The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The following describes a rotating mechanical shafting structure based on supercritical carbon dioxide and an operating method thereof according to some embodiments of the present application with reference to fig. 1 to 3.
Example one
Referring to fig. 1 and 2, an embodiment of the present application provides a supercritical carbon dioxide based rotating mechanical shafting structure, including: a heat exchange path 100, a first medium compression path 200, a second medium compression path 300, a work path 400, and a transmission 2; the first medium compression path 200 and the second medium compression path 300 are arranged in parallel and have the same input end and the same output end; heat exchange path 100 includes a first heat exchange path 101 and a second heat exchange path 102;
the output end of the first heat exchange path 101 is communicated with the same input end; the same output end is communicated with the input end of the second heat exchange path 102; the output end of the second heat exchange path 102 is communicated with the input end of the work path 400;
the output end of the work path 400 is communicated with the input end of the heat exchange path 100; the first medium compression path 200 is provided with a first compressor 6, the second medium compression path 300 is provided with a second compressor 8, and the first compressor 6 and the second compressor 8 are coaxially provided;
the heat exchange path 100 is provided with a turbine 3, and the turbine 3 is connected to a common rotating shaft of the first compressor 6 and the second compressor 8 through the speed change device 2.
As can be seen from the above description, the common rotating shaft of the first compressor 6 and the second compressor 8 and the main shaft of the turbine 3 are non-coaxially arranged, and both are connected to the speed changing device 2, so that under the coordination action of the speed changing device 2, the turbine 3 and the compressor can operate at respective optimal rotating speeds, the aerodynamic efficiency of the system is improved, and the performance and economic benefit of the whole supercritical carbon dioxide circulating system are improved.
In addition, because the first compressor 6 and the second compressor 8 are coaxially and symmetrically arranged, the air inlets of the two compressors are arranged oppositely or oppositely, so that the axial thrust borne by the common rotating shaft of the two compressors is offset, the two compressors are more stable to operate, and the safety and the stability of the system operation are increased.
Wherein, optionally, the turbine 3 adopts a multi-stage axial flow, the stage number of the blades is between 4 and 8, the flow rate is between 90 and 750kg/s, the inlet temperature range is 500-630 ℃, the shaft power range is 15-46MW, and the rotating speed is 5000-15000 rpm.
The second compressor 8, namely the main compressor, adopts a single-stage or multi-stage centrifugal type, the impeller stage number is between 1 and 2 stages, the flow rate is between 60 and 450kg/s, the total pressure ratio range is between 1.8 and 3.6, the inlet pressure range is between 7.7 and 9.0MPA, the inlet temperature range is between 33 and 40 ℃, the consumed power is between 2.5 and 8MW, and the rotating speed is in the range of 7500 plus 24000 rpm; the first compressor 6, namely the recompressor adopts a multi-stage centrifugal type, the impeller stage number is between 2 and 3, the flow rate is between 25 and 300kg/s, the total pressure ratio ranges from 1.8 to 3.6, the consumed power is between 2.5 and 9MW, and the rotating speed is in the range of 7500-24000 rpm.
Note that, here, the same input end of the first medium compression path 200 and the second medium compression path 300 refers to a start end of the two parallel paths of the first medium compression path 200 and the second medium compression path 300, and the same output end of the first medium compression path 200 and the second medium compression path 300 refers to a termination end of the two parallel paths of the first medium compression path 200 and the second medium compression path 300. In the embodiment shown in fig. 1, the final path of second media compression path 300 merges with first media compression path 200 after passing through low temperature regenerator 5 as described below.
The transmission 2 may be a gearbox having a multi-stage gear transmission, and will not be described in detail herein.
Of course, the configurations of the turbine 3, the first compressor 6, the second compressor 8, and the transmission 2 are not limited to this, and may be selected according to actual needs.
In this embodiment, preferably, as shown in fig. 1 and fig. 2, since the first compressor 6 and the second compressor 8 are coaxially and symmetrically arranged, the same first sealing structure 14 is shared between the first compressor 6 and the second compressor 8, that is, in a limited space, the shaft end sealing function is performed, and simultaneously, the structure is simplified, the parts are reduced, and the production cost is reduced.
Wherein, optionally, the first sealing structure 14 may be any one of a labyrinth seal, a carbon ring seal and a dry gas seal, i.e. selected according to actual needs.
In this embodiment, as shown in fig. 2, preferably, besides the same first sealing structure 14 is disposed on the side where the first compressor 6 and the second compressor 8 are close to each other, the ends of the first compressor 6 and the second compressor 8 that are away from each other are both provided with a second sealing structure 15, so as to ensure that no leakage occurs at the two shaft ends of the first compressor 6 and the second compressor 8 that are away from each other.
Wherein, optionally, this second sealing structure 15 may be any one or any combination of labyrinth seal, carbon ring seal and dry gas seal, that is, selected according to actual needs.
In addition, the two end portions of the turbine 3 are provided with third sealing structures 18, so as to ensure the sealing performance of the turbine 3, and the third sealing structures 18 may be any one or any combination of labyrinth seals, carbon ring seals and dry gas seals, that is, they are selected according to actual needs.
The heat exchange path 100, the first medium compression path 200, the second medium compression path 300, and the work path 400 will be described in detail below.
In this embodiment, preferably, as shown in fig. 1 and 2, the power path 400 is provided with the heat source 9 and the turbine 3, and the heat exchange path 100 is provided with the high temperature regenerator 4 and the low temperature regenerator 5;
wherein, the low-pressure input end of the high-temperature regenerator 4 is communicated with the output end of the turbine 3, the low-pressure output end of the high-temperature regenerator 4 is communicated with the low-pressure input end of the low-temperature regenerator 5, and the low-pressure output end of the low-temperature regenerator 5 is communicated with the same input end of the first medium compression path 200 and the second medium compression path 300 to form a first heat exchange path 101;
an input end of the first compressor 6 communicates with the same input ends of the first medium compression path 200 and the second medium compression path 300, and an output end of the first compressor 6 communicates with the same output ends of the first medium compression path 200 and the second medium compression path 300 to form the first medium compression path 200;
the input end of the second compressor 8 is communicated with the same input ends of the first medium compression path 200 and the second medium compression path 300, and the output end of the second compressor 8 is communicated with the high-pressure input end of the low-temperature heat regenerator 5 to form a second medium compression path 300;
the high-pressure output end of the low-temperature heat regenerator 5 and the output end of the first compressor 6 are both communicated with the same output end of the first medium compression path 200 and the second medium compression path 300, and the same output end is communicated with the high-pressure input end of the high-temperature heat regenerator 4 to form a second heat exchange path 102;
the high-pressure output end of the high-temperature heat regenerator 4 is communicated with the input end of a heat source 9, and the output end of the heat source 9 is communicated with the input end of the turbine 3.
In the Brayton cycle, a heat exchanger is needed to complete the heat conversion and mass transfer of working media at the cold and hot sides.
The second medium compression path 300 is further provided with a cooler 7, an input end of the cooler 7 is communicated with the same input ends of the first medium compression path 200 and the second medium compression path 300, and an output end of the cooler 7 is communicated with an input end of the second compressor 8; the cooler 7 enables the working medium to approach the critical parameter at the inlet of the second compressor 8, which can significantly reduce the power consumption of the second compressor 8 and improve the efficiency of the system.
The rotary mechanical shafting structure based on the supercritical carbon dioxide also comprises a driving device 10 and a power generation device 1; the drive device 10, the power generation device 1, and the transmission 2 are connected in this order, and a torque converter 11 is provided between the drive device 10 and the power generation device 1.
According to the structure described above, the normal working process of the rotating mechanical shafting structure based on supercritical carbon dioxide is as follows:
the working medium discharged by the turbine 3 is discharged by the high-temperature heat regenerator 4 and the low-temperature heat regenerator 5 in sequence, the working medium discharged by heat release is divided into two paths, wherein one path of working medium is compressed to a high-pressure state by the first compressor 6, the other path of working medium is cooled by the cooler 7, is compressed to a high-pressure state by the first compressor 6, is heated by the low-temperature heat regenerator 5 and is mixed with the previous path of working medium in the high-pressure state, the mixed working medium absorbs heat by the high-temperature heat regenerator 4 and the heat source 9 in sequence, finally flows into the turbine 3 to do work, and the process is repeated by the working medium discharged by the turbine 3.
Note that one of the working mediums enters the second compressor 8 after being cooled by the cooler 7, and the temperature rise is low after being compressed, so that the working medium needs to be heated by the low-temperature heat regenerator 5 again to increase the temperature, and the other working medium is not cooled by the cooler 7, and is far away from the critical temperature of the working medium corresponding to the inlet temperature of the second compressor 8, and after being compressed to a certain pressure, the temperature of the working medium is high, so that the temperature does not need to be increased by the low-temperature heat regenerator 5. The two paths of working media are converged and then subjected to heat exchange through the high-temperature heat regenerator 4 to achieve the purpose of temperature improvement, so that the power of a heat source 9 can be effectively reduced, and the efficiency of the system is improved.
The reason for this is that the working medium split is used as follows: the specific heat capacity of working medium in low temperature regenerator 5 is high, the low pressure side changes comparatively acutely, enthalpy value large amplitude variation can not arouse great temperature rise, if the inside heat transfer difference in temperature of regenerator undersize, the local temperature that cold flow body is more than the condition of the temperature of hot-fluid probably appears, influence the stability of system operation, the benefit of shunting at the exit end of low temperature regenerator 5 lies in, reduce the flow of the high pressure side of low temperature regenerator 5, and then increase the inside difference in temperature of low temperature regenerator 5, thereby above-mentioned problem has been solved.
The high-temperature regenerator 4 has two channels, namely a first channel and a second channel, the low-temperature regenerator 5 has two channels, namely a third channel and a fourth channel, and the specific circulation process of the working medium in the channels is as follows: working media sequentially flow through a first channel of the high-temperature regenerator 4 and a third channel of the low-temperature regenerator 5 and are divided at the outlet end of the third channel, wherein one path of working media is compressed by the cooler 7 and the second compressor 8 and then flows through a fourth channel of the low-temperature regenerator 5, the other path of working media is compressed by the first compressor 6 and then is converged with the working media discharged through the fourth channel, the converged working media flow through the second channel of the high-temperature regenerator 4, and the working media flow out and then sequentially flow through the heat source 9 and the turbine 3.
And for the starting stage before the normal working stage, when the system is started, the torque converter 11 is closed, the driving device 10 drives the first compressor 6 and the second compressor 8 to work to provide initial power, and when the system is normally operated, the turbine 3 provides power for the operation of the first compressor 6 and the second compressor 8. Of course, the starting mode is various, not limited to the above, and can be selected according to actual needs.
In this embodiment, preferably, as shown in fig. 2, the end portions of the first compressor 6 and the second compressor 8 facing away from each other are provided with a first radial bearing 12, and a side of the first compressor 6 close to the speed changing device 2 is further provided with a first thrust bearing 13, although, not limited thereto, the first thrust bearing 13 may be provided at other positions on the common rotating shaft of the first compressor 6 and the second compressor 8 according to actual needs;
both ends of the turbine 3 are provided with second radial bearings 16 and the turbine 3 is provided with second thrust bearings 17 near its inlet side.
According to the structure described above, the above bearing structure can ensure the safety and stability of the shafting operation.
Optionally, the first radial bearing 12, the second radial bearing 16, and the thrust bearing are any one of a ball bearing, a gas foil bearing, a magnetic bearing, a dynamic pressure bearing, a hydrostatic bearing, and an oil-lubricated bearing, and may be selected and combined according to actual needs.
In conclusion, in the rotating mechanical shafting structure based on the supercritical carbon dioxide, the first compressor and the second compressor are coaxially arranged in a butting mode and share the same sealing structure, axial thrust and shaft end leakage amount of a compressor shafting can be effectively reduced, the structure is simplified, cost is reduced, in addition, axial thrust borne by a common rotating shaft of the two compressors is offset, and the operation reliability and safety of the shafting structure are enhanced. The common rotating shaft of the first compressor 6 and the second compressor 8 and the main shaft of the turbine 3 are arranged in a non-coaxial mode through the speed changing device 2, and under the coordination effect of the speed changing device 2, the turbine 3 and the compressors can operate at respective optimal rotating speeds, so that the pneumatic efficiency of the system is improved, and the performance and the economic benefit of the whole supercritical carbon dioxide circulating system are improved.
Example two
In this embodiment, preferably, as shown in fig. 1 and fig. 3, the working method based on the supercritical carbon dioxide rotating mechanical shafting structure includes the following steps:
one path of working medium is compressed to a high-pressure state by the first compressor 6, the other path of working medium is cooled by the cooler 7, then is compressed to the high-pressure state by the second compressor 8, is heated by the low-temperature heat regenerator 5, is mixed with the previous path of working medium in the high-pressure state, and the mixed working medium absorbs heat through the high-temperature heat regenerator 4 and the heat source 9 in sequence and finally flows into the turbine 3 to do work;
Through the form of working medium reposition of redundant personnel, divide the reposition of redundant personnel at the exit end of low temperature regenerator 5 promptly, reduced the difference in temperature of the tip of low temperature regenerator 5, promoted the stability of entire system operation, also promoted the efficiency of entire system circulation simultaneously.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A rotary mechanical shafting structure based on supercritical carbon dioxide is characterized by comprising: the heat exchanger comprises a heat exchange path, a first medium compression path, a second medium compression path, a work applying path and a speed changing device;
the first medium compression path and the second medium compression path are arranged in parallel and have the same input end and the same output end; the heat exchange path comprises a first heat exchange path and a second heat exchange path;
the output end of the first heat exchange path is communicated with the same input end; the same output end is communicated with the input end of the second heat exchange path; the output end of the second heat exchange path is communicated with the input end of the working path; the output end of the working path is communicated with the input end of the first heat exchange path;
the first medium compression path is provided with a first compressor, the second medium compression path is provided with a second compressor, and the first compressor and the second compressor are coaxially arranged; the heat exchange path is provided with a turbine, and the turbine is connected with a common rotating shaft of the first compressor and the second compressor through the speed changing device.
2. The supercritical carbon dioxide based rotary mechanical shafting structure according to claim 1, wherein the first compressor and the second compressor are symmetrically arranged, and a same first sealing structure is arranged between the first compressor and the second compressor.
3. The supercritical carbon dioxide based rotary mechanical shafting structure according to claim 2, wherein the ends of the first compressor and the second compressor facing away from each other are each provided with a second sealing structure.
4. The rotary mechanical shafting structure based on supercritical carbon dioxide as claimed in claim 3, wherein both ends of said turbine are provided with third sealing structures.
5. The supercritical carbon dioxide based rotary mechanical shafting structure according to claim 4, wherein said first sealing structure, said second sealing structure and said third sealing structure are any one of labyrinth seal, carbon ring seal and dry gas seal or any combination of labyrinth seal, carbon ring seal and dry gas seal.
6. The supercritical carbon dioxide based rotating mechanical shafting structure according to claim 1, wherein the working path is provided with a heat source and a turbine; wherein the input end of the heat source is communicated with the output end of the second heat exchange path;
and the output end of the heat source is communicated with the input end of the turbine.
7. The supercritical carbon dioxide based rotary mechanical shafting structure according to claim 6, wherein said heat exchange path is provided with a high temperature regenerator and a low temperature regenerator;
the low-pressure input end of the high-temperature regenerator is communicated with the output end of the turbine, the low-pressure output end of the high-temperature regenerator is communicated with the low-pressure input end of the low-temperature regenerator, and the low-pressure output end of the low-temperature regenerator is communicated with the same input end of the first medium compression path and the second medium compression path to form the first heat exchange path;
an input end of the first compressor is communicated with the same input end of the first medium compression path and the second medium compression path, and an output end of the first compressor is communicated with the same output end of the first medium compression path and the second medium compression path to form a first medium compression path;
the input end of the second compressor is communicated with the same input end of the first medium compression path and the second medium compression path, and the output end of the second compressor is communicated with the high-pressure input end of the low-temperature heat regenerator to form the second medium compression path;
the high-pressure output end of the low-temperature heat regenerator and the output end of the first compressor are communicated with the same output end of the first medium compression path and the same output end of the second medium compression path, and the same output end of the low-temperature heat regenerator and the same output end of the first compressor are communicated with the high-pressure input end of the high-temperature heat regenerator to form the second heat exchange path.
8. The supercritical carbon dioxide based rotating mechanical shafting structure according to claim 7, wherein said second medium compression path is further provided with a cooler, an input end of said cooler is communicated with the same input end of said first medium compression path and said second medium compression path, and an output end of said cooler is communicated with an input end of said second compressor.
9. The supercritical carbon dioxide based rotating mechanical shafting structure according to any one of claims 1 to 8, wherein the supercritical carbon dioxide based rotating mechanical shafting structure further comprises a driving device and a power generation device;
the driving device, the power generation device and the speed change device are sequentially connected, and a torque converter is arranged between the driving device and the power generation device.
10. The supercritical carbon dioxide based rotating mechanical shafting structure according to any one of claims 1 to 8, wherein the end parts of the first compressor and the second compressor facing away from each other are provided with a first radial bearing, and a first thrust bearing is arranged on the coaxial structure formed by the first compressor and the second compressor;
and second radial bearings are arranged at two end parts of the turbine, and second thrust bearings are arranged close to the inlet side of the turbine.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237023A (en) * | 2020-03-20 | 2020-06-05 | 杭州汽轮机股份有限公司 | Rotating mechanical shafting structure based on supercritical carbon dioxide and working method |
| CN112855298A (en) * | 2021-02-01 | 2021-05-28 | 北京前沿动力科技股份有限公司 | Supercritical carbon dioxide circulating power generation system and operation method thereof |
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2020
- 2020-03-20 CN CN202020369422.7U patent/CN211666785U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237023A (en) * | 2020-03-20 | 2020-06-05 | 杭州汽轮机股份有限公司 | Rotating mechanical shafting structure based on supercritical carbon dioxide and working method |
| CN112855298A (en) * | 2021-02-01 | 2021-05-28 | 北京前沿动力科技股份有限公司 | Supercritical carbon dioxide circulating power generation system and operation method thereof |
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Address after: 310022 Building 1, No. 608, Kangxin Road, Linping District, Hangzhou, Zhejiang Patentee after: Hangzhou Turbine Power Group Co.,Ltd. Address before: 357 Shiqiao Road, Xiacheng District, Hangzhou City, Zhejiang Province Patentee before: HANGZHOU STEAM TURBINE Co.,Ltd. |
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