CN218991904U - Megawatt gear box type low-temperature air centrifugal compressor - Google Patents
Megawatt gear box type low-temperature air centrifugal compressor Download PDFInfo
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- CN218991904U CN218991904U CN202223008232.0U CN202223008232U CN218991904U CN 218991904 U CN218991904 U CN 218991904U CN 202223008232 U CN202223008232 U CN 202223008232U CN 218991904 U CN218991904 U CN 218991904U
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Abstract
A megawatt gear box type low-temperature air centrifugal compressor belongs to the technical field of machine manufacturing. The device comprises a gear box, a first-stage compressor and a second-stage compressor, wherein output ends at two sides of the gear box are respectively connected with the first-stage compressor and the second-stage compressor, and a first-stage exhaust port of the first-stage compressor is connected with a second-stage air inlet of the second-stage compressor through an interstage pipeline; the gear box comprises a compressor driving main shaft, a driving motor shaft and a turbine shaft which are sequentially arranged in parallel in a rotating manner in a gear box shell, wherein the driving motor shaft respectively establishes a transmission connection relationship with the compressor driving main shaft and the turbine shaft through a transmission gear set, the driving motor shaft is connected with the driving motor, and the turbine shaft is connected with the turbine. The purpose is in order to solve the problem that the existing low temperature air centrifugal compressor is complex in internal structure, low in efficiency and inconvenient to carry, install and maintain, and has the characteristics of compact structure, good sealing performance, high efficiency, flexible starting, safe and reliable operation and convenient maintenance.
Description
Technical Field
The utility model relates to a megawatt gear box type low-temperature air centrifugal compressor, and belongs to the technical field of mechanical manufacturing.
Background
The compressed air energy storage can be not limited by the field, has large energy storage capacity, high response speed, large power range and strong field adaptability, and is greatly valued, and the development is extremely rapid at present. The compressed air energy storage system comprises two modes of pressure storage and heat storage, wherein the heat storage refers to the storage of compression heat generated in the process of compressing air by a compressor, and the stored compression heat is used for heating the compressed air in the process of generating electricity and releasing energy to drive an air turbine to do work. The compressed air heat storage system in the prior art is a newly developed energy storage system, the suitability of the existing centrifugal compressor in the market on the system is poor, the pertinence is not strong, and the working efficiency is not high.
Therefore, it is needed to provide a new megawatt gear box type low-temperature air centrifugal compressor to solve the above technical problems.
Disclosure of Invention
The utility model aims to solve the problems of poor suitability, low pertinence and low working efficiency of the existing centrifugal compressor on the market in the system because the compressed air heat storage system in the prior art is a newly developed energy storage system, and the parameter requirements of the compressed air heat storage system are met in an equipment layer, so that the verification of the whole system is completed. The following presents a simplified summary of the utility model in order to provide a basic understanding of some aspects of the utility model. It should be understood that this summary is not an exhaustive overview of the utility model. It is not intended to identify key or critical elements of the utility model or to delineate the scope of the utility model.
The technical scheme of the utility model is as follows:
the megawatt gear box type low-temperature air centrifugal compressor comprises a gear box, a first-stage compressor and a second-stage compressor, wherein output ends at two sides of the gear box are respectively connected with the first-stage compressor and the second-stage compressor, and a first-stage exhaust port of the first-stage compressor is connected with a second-stage air inlet of the second-stage compressor through an interstage pipeline;
the gear box comprises a gear box shell, a compressor driving main shaft, a driving motor shaft and a turbine shaft, wherein the compressor driving main shaft, the driving motor shaft and the turbine shaft are sequentially installed in the gear box shell in parallel in a parallel rotation mode, the driving motor shaft respectively establishes a transmission connection relation with the compressor driving main shaft and the turbine shaft through a transmission gear set, the driving motor shaft is connected with the driving motor, and the turbine shaft is connected with the turbine.
Preferably: the first-stage compressor comprises a first impeller, a first volute, a first air seal body, a first diffuser, a first air inlet flange and an inlet adjustable guide vane, wherein one end of the first volute is fixedly arranged on one side of the gear box, the other end of the first volute is provided with the first diffuser, the first air inlet flange is fixedly connected with the first volute through the first diffuser, the first impeller is arranged inside the volute, the first impeller is arranged at the end part of a driving spindle of the compressor, one side of the first air seal body is attached to the outer side wall of the first impeller and is fixedly connected with the first diffuser, and the other side of the first air seal body is communicated with a middle air inlet of the first air inlet flange through the inlet adjustable guide vane to jointly form a first-stage air inlet of the first-stage compressor.
Preferably: a first carbon ring sealing assembly is arranged between the outer side wall of the end part of the compressor driving main shaft and the inner side wall of the first volute.
Preferably: the first impeller is in spline connection with the end part of the compressor driving main shaft, and is fastened through a first pull rod bolt.
Preferably: the secondary compressor comprises a second impeller, a second volute, a second air seal body, a second diffuser, a second air inlet flange and a transition section, wherein one end of the second volute is fixedly arranged on the other side of the gear box, the other end of the second volute is provided with the second diffuser, the second diffuser is fixedly connected with the second volute through the second air inlet flange, the second impeller is arranged in the second volute in a first mode, the second impeller is arranged at the end portion of a driving main shaft of the compressor, one side of the second air seal body is attached to the outer side wall of the second impeller and is fixedly connected with the second diffuser, and the other side of the second air seal body is communicated with a middle air inlet of the second air inlet flange through the transition section to jointly form a secondary air inlet of the secondary compressor.
Preferably: and the second impeller is in spline connection with the end part of the compressor driving main shaft and is fastened through a second pull rod bolt.
Preferably: the secondary compressor is provided with a secondary exhaust port, working medium enters the primary compressor through the primary air inlet, then enters the secondary air inlet of the secondary compressor through an interstage pipeline from the primary exhaust port, and the working medium entering the secondary compressor is discharged into the molten salt heat exchanger through the secondary exhaust port after being compressed.
Preferably: a pneumatic regulating valve is arranged on a first-stage air inlet of the first-stage compressor.
Preferably: the transmission gear set comprises a transmission shaft, a first gear, a second gear, a third gear and a fourth gear, the transmission shaft is rotatably arranged on the gear box shell and arranged between the compressor driving main shaft and the driving motor shaft, the first gear is arranged on the compressor driving main shaft, the second gear is arranged on the transmission shaft, the third gear is arranged on the driving motor shaft, the fourth gear is arranged on the turbine shaft, the second gear is meshed with the first gear and the third gear respectively, and the third gear is meshed with the fourth gear.
Preferably: the gearbox shell is fixedly connected with the base frame to be installed through foundation bolts.
The utility model has the following beneficial effects:
1. according to the utility model, the air inlet temperature of the primary compressor can reach-20 ℃, materials are selected and structural design is carried out according to the low-temperature characteristics, and the pertinence of the overall structure of the compressor is stronger;
2. the whole machine adopts a gear box type design, has a compact overall structure, can adopt overall delivery, namely, all parts are sleeved in an equipment manufacturing plant to complete assembly, and are directly and integrally transported to a site to connect foundation bolts, so that the site workload is reduced, the installation difficulty is reduced, and the construction efficiency is improved;
3. the turbine, the driving motor and the compressor are respectively at different rotating speeds, differential transmission can be realized by adopting a gear box type design, and the bearing of each shaft adopts a thrust supporting bearing so as to absorb the axial force of the respective shaft;
4. the blade top air seal body and the diffuser of each stage of impeller are designed to be of an assembled structure, so that the mounting manufacturability is good, the blade top clearance value can be more accurately adjusted, the efficiency is ensured, and simultaneously, the 360-degree exhaust volute is optimized through repeated pneumatic accounting, so that the minimum pneumatic loss is ensured;
5. the end gas seal of the compressor driving main shaft adopts a mature carbon ring sealing structure, so that the end leakage is controlled to a very low level, and the efficiency of the compressor is improved.
6. The variable working condition adjustment is carried out by combining the inlet adjustable guide vane and the inlet adjusting valve, so that the adjustable guide vane valve has a wide adjustment range and good economy.
Drawings
FIG. 1 is a schematic diagram of the structure of a gearbox of a megawatt gearbox type low temperature air centrifugal compressor;
FIG. 2 is a front view of a megawatt gear box type low temperature air centrifugal compressor;
FIG. 3 is a top view of a megawatt gear box type low temperature air centrifugal compressor;
FIG. 4 is a left side view of a megawatt gear box type low temperature air centrifugal compressor;
FIG. 5 is a right side view of a megawatt gear box type low temperature air centrifugal compressor;
FIG. 6 is a schematic diagram of a megawatt gear box type low temperature air centrifugal compressor;
in the figure, the gearbox comprises a 1-gearbox body, a 2-primary compressor, a 3-secondary compressor, a 4-interstage pipeline, a 2-1-primary exhaust port, a 2-2-primary inlet port, a 3-1-secondary inlet port, a 3-2-secondary exhaust port, a 11-gearbox housing, a 12-compressor drive spindle, a 13-drive motor shaft, a 14-turbine shaft, a 15-drive gear set, a 21-first impeller, a 22-first volute, a 23-first air seal body, a 24-first diffuser, a 25-first inlet flange, a 26-first carbocyclic seal assembly, a 27-inlet adjustable guide vane, a 28-first pull rod bolt, a 31-second impeller, a 32-second volute, a 33-second air seal body, a 34-second diffuser, a 35-second inlet flange, a 36-second carbocyclic seal assembly, a 37-transition section, a 38-second pull rod bolt, a 151-drive shaft, a 152-first gear, a 153-second gear, a 154-third gear and 155-fourth gear.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
The connection mentioned in the utility model is divided into a fixed connection and a detachable connection, wherein the fixed connection is a conventional fixed connection mode such as a non-detachable connection including but not limited to a hemmed connection, a rivet connection, an adhesive connection, a welded connection and the like, the detachable connection is a conventional detachable mode such as a threaded connection, a snap connection, a pin connection, a hinge connection and the like, and when a specific connection mode is not limited explicitly, at least one connection mode can be found in the conventional connection mode by default, so that the function can be realized, and a person skilled in the art can select the device according to needs. For example: the fixed connection is welded connection, and the detachable connection is hinged connection.
The first embodiment is as follows: 1-6, a megawatt gear box type low-temperature air centrifugal compressor of the embodiment comprises a gear box 1, a first-stage compressor 2 and a second-stage compressor 3, wherein output ends on two sides of the gear box 1 are respectively connected with the first-stage compressor 2 and the second-stage compressor 3, and a first-stage exhaust port 2-1 of the first-stage compressor 2 is connected with a second-stage air inlet 3-1 of the second-stage compressor 3 through an inter-stage pipeline 4;
the gear box 1 comprises a gear box shell 11, a compressor driving main shaft 12, a driving motor shaft 13 and a turbine shaft 14, the compressor driving main shaft 12, the driving motor shaft 13 and the turbine shaft 14 are sequentially installed in the gear box shell 11 in parallel in a parallel rotation mode, the driving motor shaft 13 respectively establishes transmission connection with the compressor driving main shaft 12 and the turbine shaft 14 through a transmission gear set 15, the driving motor shaft 13 is connected with a driving motor through a diaphragm coupler, the turbine shaft 14 is connected with the turbine through the diaphragm coupler, the transmission gear set 15 comprises a transmission shaft 151, a first gear 152, a second gear 153, a third gear 154 and a fourth gear 155, the transmission shaft 151 is rotatably installed on the gear box shell 11 and is arranged between the compressor driving main shaft 12 and the driving motor shaft 13, a first gear 152 is installed on the transmission shaft 151, a second gear 153 is installed on the driving motor shaft 13, a third gear 154 is installed on the turbine shaft 14, a fourth gear 155 is installed on the turbine shaft 153, the second gear 153 is respectively meshed with the first gear 152 and the third gear 154 and the fourth gear 155, the third gear 155 are meshed with the fourth gear 155, the gear 11 is fixedly connected with the driving motor through the diaphragm coupler, when the gear box shell 11 is in a fixed connection with the motor, the driving motor is converted into a compressor driving power mode, the compressor is converted into a compression mode, and the compressor power is converted into a compression mode, and a compression mode is achieved, the compression mode is achieved after the compression mode is converted and a compression mode is achieved, and a compression stage is converted to be compressed and a compression stage is started;
the primary compressor 2 comprises a first impeller 21, a first volute 22, a first air seal body 23, a first diffuser 24, a first air seal body 23 and an inlet adjustable guide vane 27, one end of the first volute 22 is fixedly arranged on one side of the gear box 1, the other end of the first volute 22 is provided with the first diffuser 24, the first air inlet flange 25 is fixedly connected with the first volute 22 through the first diffuser 24, the first impeller 21 is arranged inside the volute 22, the first impeller 21 is mounted at the end part of the compressor driving main shaft 12, spline connection is established between the first impeller 21 and the first air seal body, torque is transmitted through the spline, the first air seal body is fastened through a first pull rod bolt 28, one side of the first air seal body 23 is attached to the outer side wall of the first impeller 21 and fixedly connected with the first diffuser 24, the other side of the first air seal body 23 is communicated with the middle air inlet of the first air inlet flange 25 through the inlet adjustable guide vane 27, the first air inlet 2-2 of the primary compressor 2 is jointly formed, and a first carbon ring sealing component 26 is arranged between the outer side wall of the end part of the compressor driving main shaft 12 and the inner side wall of the first volute 22.
The secondary compressor 3 comprises a second impeller 31, a second volute 32, a second air seal body 33, a second diffuser 34, a second air inlet flange 35 and a transition section 37, one end of the second volute 32 is fixedly arranged on the other side of the gear box 1, the other end of the second volute 32 is provided with the second diffuser 34, the second diffuser 34 is fixedly connected with the second volute 32 through the second air inlet flange 35, the second impeller 31 is arranged in the second volute 32, the second impeller 31 is mounted at the end part of the compressor driving main shaft 12, spline connection is established between the second impeller 31 and the second impeller, torque is transmitted through the spline, the second air seal body is fastened through a second pull rod bolt 38, one side of the second air seal body 33 is attached to the outer side wall of the second impeller 31 and fixedly connected with the second diffuser 34, the other side of the second air seal body 33 is communicated with the middle air inlet of the second air inlet flange 35 through the transition section 37, and a second carbon ring sealing assembly 36 is arranged between the outer side wall of the end part of the compressor driving main shaft 12 and the inner side wall of the second volute 32.
The first-stage air inlet 2-2 of the first-stage compressor 2 is provided with a pneumatic regulating valve, and the inlet adjustable guide vanes 27 and the pneumatic regulating valve can meet the requirement of working condition regulation. The back of the first impeller 21 and the back of the second impeller 31 are both designed with back blades.
In the present embodiment, the compressor driving main shaft 12, the driving motor shaft 13 and the turbine shaft 14 are rotatably mounted by thrust support bearings, and the thrust support bearings can absorb the axial force of the respective shafts.
It should be noted that, in the above embodiments, as long as the technical solutions that are not contradictory can be arranged and combined, those skilled in the art can exhaust all the possibilities according to the mathematical knowledge of the arrangement and combination, so the present utility model does not describe the technical solutions after the arrangement and combination one by one, but should be understood that the technical solutions after the arrangement and combination have been disclosed by the present utility model.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A megawatt gear box type low-temperature air centrifugal compressor is characterized in that: the device comprises a gear box (1), a primary compressor (2) and a secondary compressor (3), wherein output ends at two sides of the gear box (1) are respectively connected with the primary compressor (2) and the secondary compressor (3), and a primary exhaust port (2-1) of the primary compressor (2) is connected with a secondary air inlet (3-1) of the secondary compressor (3) through an interstage pipeline (4);
the gear box (1) comprises a gear box shell (11), a compressor driving main shaft (12), a driving motor shaft (13) and a turbine shaft (14), wherein the compressor driving main shaft (12), the driving motor shaft (13) and the turbine shaft (14) are sequentially installed in the gear box shell (11) in parallel in a side-by-side mode, the driving motor shaft (13) respectively establishes a transmission connection relation with the compressor driving main shaft (12) and the turbine shaft (14) through a transmission gear set (15), the driving motor shaft (13) is connected with the driving motor, and the turbine shaft (14) is connected with the turbine.
2. A megawatt-level gear box type low-temperature air centrifugal compressor according to claim 1, wherein: the primary compressor (2) comprises a first impeller (21), a first volute (22), a first air seal body (23), a first diffuser (24), a first air inlet flange (25) and an inlet adjustable guide vane (27), wherein one end of the first volute (22) is fixedly arranged on one side of the gear box (1), the other end of the first volute (22) is provided with the first diffuser (24), the first air inlet flange (25) is fixedly connected with the first volute (22) through the first diffuser (24), the first impeller (21) is arranged inside the first volute (22), the first impeller (21) is arranged at the end part of a compressor driving main shaft (12), one side of the first air seal body (23) is attached to the outer side wall of the first impeller (21) and is fixedly connected with the middle part of the first air inlet flange (25), and the other side of the first air seal body (23) is communicated with the air inlet of the first air inlet flange (25) through the inlet adjustable guide vane (27), so as to jointly form a primary air inlet (2-2) of the primary compressor (2).
3. A megawatt-level gear box type low-temperature air centrifugal compressor according to claim 2, wherein: a first carbon ring sealing assembly (26) is arranged between the outer side wall of the end part of the compressor driving main shaft (12) and the inner side wall of the first volute (22).
4. A megawatt-level gear box type low-temperature air centrifugal compressor according to claim 3, wherein: the first impeller (21) is in spline connection with the end part of the compressor driving main shaft (12), and is fastened through a first pull rod bolt (28).
5. A megawatt-level gear box type low temperature air centrifugal compressor according to any one of claims 1 to 4, characterized in that: the secondary compressor (3) comprises a second impeller (31), a second volute (32), a second air seal body (33), a second diffuser (34), a second air inlet flange (35) and a transition section (37), one end of the second volute (32) is fixedly arranged on the other side of the gear box (1), the second diffuser (34) is arranged at the other end of the second volute (32), the second diffuser (34) is fixedly connected with the second volute (32) through the second air inlet flange (35), the second impeller (31) is arranged inside the second volute (32), the second impeller (31) is arranged at the end part of a compressor driving main shaft (12), one side of the second air seal body (33) is attached to the outer side wall of the second impeller (31) and is fixedly connected with the second diffuser (34), and the other side of the second air seal body (33) is communicated with the middle air inlet of the second air inlet flange (35) through the transition section (37) to jointly form a secondary air inlet (3-1) of the secondary compressor (3).
6. A megawatt-level gear box type low-temperature air centrifugal compressor according to claim 5, wherein: a second carbon ring sealing assembly (36) is arranged between the outer side wall of the end part of the compressor driving main shaft (12) and the inner side wall of the second volute (32), and the second impeller (31) is in spline connection with the end part of the compressor driving main shaft (12) and is fastened through a second pull rod bolt (38).
7. A megawatt-level gear box type low-temperature air centrifugal compressor according to claim 1, wherein: the secondary compressor (3) is provided with a secondary air outlet (3-2), working medium enters the primary compressor (2) through the primary air inlet (2-2), then enters the secondary air inlet (3-1) of the secondary compressor (3) from the primary air outlet (2-1) through an interstage pipeline (4), and is discharged into the molten salt heat exchanger through the secondary air outlet (3-2) after being compressed.
8. A megawatt-level gear box type low-temperature air centrifugal compressor according to claim 7, wherein: a pneumatic regulating valve is arranged on a first-stage air inlet (2-2) of the first-stage compressor (2).
9. A megawatt-level gear box type low-temperature air centrifugal compressor according to claim 1, wherein: the transmission gear set (15) comprises a transmission shaft (151), a first gear (152), a second gear (153), a third gear (154) and a fourth gear (155), the transmission shaft (151) is rotatably installed on the gear box shell (11) and is arranged between the compressor driving main shaft (12) and the driving motor shaft (13), the first gear (152) is installed on the compressor driving main shaft (12), the second gear (153) is installed on the transmission shaft (151), the third gear (154) is installed on the driving motor shaft (13), the fourth gear (155) is installed on the turbine shaft (14), the second gear (153) is meshed with the first gear (152) and the third gear (154) respectively, and the third gear (154) is meshed with the fourth gear (155).
10. A megawatt-level gear box type low-temperature air centrifugal compressor according to claim 1, wherein: the gearbox shell (11) is fixedly connected with the base frame to be installed through foundation bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223008232.0U CN218991904U (en) | 2022-11-11 | 2022-11-11 | Megawatt gear box type low-temperature air centrifugal compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223008232.0U CN218991904U (en) | 2022-11-11 | 2022-11-11 | Megawatt gear box type low-temperature air centrifugal compressor |
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| Publication Number | Publication Date |
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| CN218991904U true CN218991904U (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223008232.0U Active CN218991904U (en) | 2022-11-11 | 2022-11-11 | Megawatt gear box type low-temperature air centrifugal compressor |
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