CN218912975U - Centripetal turbine power generation device suitable for ultralow flow and high pressure ratio - Google Patents
Centripetal turbine power generation device suitable for ultralow flow and high pressure ratio Download PDFInfo
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Abstract
A centripetal turbine power generation device suitable for ultra-low flow and high pressure ratio belongs to the technical field of turbine power generation devices. The utility model comprises a gear box, a first-stage turbine, a second-stage turbine, a third-stage turbine, a fourth-stage turbine and a generator, wherein the middle output end of the gear box is connected with the generator, the front and rear two input ends of the high-pressure side of the gear box are respectively provided with the first-stage turbine and the second-stage turbine, the front and rear two input ends of the low-pressure side of the gear box are respectively provided with the third-stage turbine and the fourth-stage turbine, the inlet of the first-stage turbine is a high-pressure inlet, the outlet of the first-stage turbine is connected with the inlet of the second-stage turbine through a pipeline, the outlet of the second-stage turbine is connected with the inlet of the third-stage turbine through a pipeline, the outlet of the third-stage turbine is connected with the inlet of the fourth-stage turbine through a pipeline, and the outlet of the fourth-stage turbine is a low-pressure outlet. The turbine generator solves the problem that the existing turbine generator is not applicable under the working conditions of ultralow flow and high drop ratio, can be integrated and arranged in the same gear box, has compact structure and low cost, and is very suitable for a small-sized system test bed.
Description
Technical Field
The utility model relates to a centripetal turbine power generation device suitable for ultralow flow and high pressure ratio, and belongs to the technical field of turbine power generation devices.
Background
Under the background of carbon reaching peaks and carbon neutralization energy sources, the comprehensive utilization of distributed energy sources and energy sources has important value, and in view of the important value, relevant test bed construction is carried out in various places in China so as to verify possible energy system construction projects in the future. The turbine expander and the whole set of turbine power generation device are used as main equipment for energy conversion, and the feasibility of the construction of a system test bed is determined. In a small system test bed, the flow rate of a working medium is often not large, an expander power generation unit faces an ultralow flow rate working condition lower than 5kg/s, and a high requirement is made on the drop ratio to fully utilize the energy in a heat source, so that the expander is required to realize the drop ratio of more than 30.
The existing multi-stage axial flow turbine and single-stage centripetal turbine schemes are difficult to meet the working condition requirements, the axial flow turbine is used under the working condition of small flow, the length of blades is too short, the number of the blades is increased, the flow loss is increased, the manufacturing cost is high, and the method is not suitable for the construction of a small test bed; the centripetal turbine can allow higher circumferential speed, has the characteristics of single-stage enthalpy drop and high efficiency, has obvious advantages under the working condition of small flow, is limited by a gearbox and a generator, the rotating speed of the centripetal turbine is still controlled within 30000r/min generally, and the single-stage design cannot meet the requirement of high drop-off pressure ratio.
Therefore, there is a need to develop a new turbine power generation device to solve the above technical problems.
Disclosure of Invention
The present utility model provides an ultra low flow, high drop ratio centripetal turbine power generation apparatus suitable for use in small test systems, which solves the problem of inapplicability of existing turbine power generation apparatus under ultra low flow, high drop ratio conditions, and a brief overview of the utility model is provided below to provide a basic understanding of certain 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 utility model provides a centripetal turbine power generation facility suitable for ultralow flow, high pressure ratio, including the tooth case, the one-level turbine, the second grade turbine, tertiary turbine, four-level turbine and generator, the middle part output of tooth case is connected with the generator, two input is provided with one-level transmission and second grade turbine respectively around the tooth case high pressure side, two input are provided with tertiary transmission and four-level turbine respectively around the tooth case low pressure side, the entry of one-level turbine is the high-pressure inlet, the export of one-level turbine passes through the pipeline and is connected with the entry of second grade turbine, the export of second grade turbine passes through the pipeline and is connected with the entry of tertiary turbine, the export of tertiary turbine passes through the pipeline and is connected with the entry of fourth grade turbine, the export of fourth grade turbine is the low pressure export.
Preferably: the gearbox comprises a box body, an output shaft, a high-pressure side transmission shaft and a low-pressure side transmission shaft, wherein the output shaft is rotatably arranged in the middle of the box body, the high-pressure side transmission shaft and the low-pressure side transmission shaft are respectively arranged in the box body on the high-pressure side and the low-pressure side of the gearbox in a rotating fit manner, and the high-pressure side transmission shaft and the low-pressure side transmission shaft are connected with the output shaft through a gear transmission group.
Preferably: the first-stage turbine comprises a first volute and a first-stage impeller, the second-stage turbine comprises a second volute and a second-stage impeller, the third-stage turbine comprises a third volute and a third-stage impeller, the fourth-stage turbine comprises a fourth volute and a fourth-stage impeller, the first volute and the second volute are respectively arranged at the front end and the rear end of the high-pressure side of the gear box, the first-stage impeller and the second-stage impeller are respectively arranged in the first volute and the second volute, the first-stage impeller and the second-stage impeller are respectively arranged at the two ends of the high-pressure side transmission shaft through a pull rod knob, the third volute and the fourth volute are respectively arranged at the front end and the rear end of the low-pressure side of the gear box, the third-stage impeller and the fourth-stage impeller are respectively arranged in the third volute and the fourth volute, and the third-stage impeller are respectively arranged at the two ends of the low-pressure side transmission shaft through the pull rod knob.
Preferably: and two ends of the high-pressure side transmission shaft are respectively connected with the first volute and the second volute through a first air sealing structure.
Preferably: and two ends of the low-pressure side transmission shaft are respectively connected with the third volute and the fourth volute through a second air seal structure.
Preferably: the first volute and the third volute are in sealing connection with the front side of the box body through a front side oil seal mechanism.
Preferably: and the second volute and the fourth volute are in sealing connection with the rear side of the box body through a rear side oil seal mechanism.
Preferably: the first-stage impeller comprises a wheel disc, a plurality of moving blades and an annular cover plate, wherein one side of the moving blades is circumferentially and uniformly arranged on the wheel disc, and the annular cover plate is arranged in a first volute positioned on the other side of the moving blades.
Preferably: the diameter d1 of the air inlet of the first-stage impeller is 144mm, the diameter d2 of the air inlet of the second-stage impeller is 186mm, the diameter d3 of the air inlet of the third-stage impeller is 230mm, and the diameter d4 of the air inlet of the fourth-stage impeller is 236mm;
the diameter D1 of the first-stage impeller hub is 40mm, the diameter D2 of the second-stage impeller hub is 40mm, the diameter D3 of the third-stage impeller hub is 60mm, and the diameter D4 of the fourth-stage impeller hub is 60mm.
Preferably: the inlet height h1 of the first-stage impeller is 5mm, the inlet height h2 of the second-stage impeller is 5mm, the inlet height h3 of the third-stage impeller is 5mm, and the inlet height h4 of the fourth-stage impeller is 12mm;
the outlet height H1 of the first-stage impeller is 11mm, the outlet height H2 of the second-stage impeller is 15mm, the outlet height H3 of the third-stage impeller is 19.5mm, and the outlet height H4 of the fourth-stage impeller is 45mm.
The utility model has the following beneficial effects:
1. the utility model can realize large enthalpy drop in a multistage series connection mode, is a centripetal turbine power generation device with ultra-low flow and high drop ratio applicable to a small test system, and solves the problem that the existing turbine power generation device is not applicable under the working conditions of ultra-low flow and high drop ratio;
2. the utility model can be integrated in the same gear box, has compact structure and lower cost, is very suitable for a small-sized system test bed, overcomes the problem of insufficient single-stage drop ratio under ultralow flow, is suitable for various integrated turbine power generation devices in low-power and small-space occasions, and has stronger practicability.
Drawings
FIG. 1 is a schematic diagram of a centripetal turbine power plant adapted for ultra-low flow, high pressure ratios in accordance with the present utility model;
FIG. 2 is a diagram showing the mating installation of a first turbine and a second turbine of a centripetal turbine generator adapted for ultra-low flow, high pressure ratio in accordance with the present utility model;
FIG. 3 is a mating installation diagram of three-stage and four-stage turbines of a centripetal turbine power-generation device suitable for ultra-low flow, high pressure ratios in accordance with the present utility model;
FIG. 4 is a mating installation view of a high side drive shaft and a low side drive shaft of a centripetal turbine power generation apparatus adapted for ultra-low flow, high pressure ratio of the present utility model;
FIG. 5 is a schematic view of a first stage impeller of a centripetal turbine power generation apparatus adapted for ultra-low flow and high pressure ratios in accordance with the present utility model;
in the figure, the gear box is 1-, the first-stage turbine is 2-, the second-stage turbine is 3-, the third-stage turbine is 4-, the fourth-stage turbine is 5-, the 6-generator is 7-high-pressure inlet, the 8-low-pressure outlet, the 11-box body is 12-output shaft, the 13-high-pressure side transmission shaft, the 14-low-pressure side transmission shaft, the 21-first volute, the 22-first-stage impeller, the 31-second volute, the 32-second-stage impeller, the 41-third volute, the 42-third-stage impeller, the 51-fourth volute, the 52-fourth-stage impeller, the 91-first air seal structure, the 92-second air seal structure, the 101-front-side oil seal structure, the 102-rear-side oil seal structure, the 221-wheel disc, the 222-multiple moving blades and the 223-annular cover plate.
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: referring to fig. 1-5, a centripetal turbine power generation device suitable for ultra-low flow and high pressure ratio in this embodiment is described, and the centripetal turbine power generation device comprises a gear box 1, a first-stage turbine 2, a second-stage turbine 3, a third-stage turbine 4, a fourth-stage turbine 5 and a generator 6, wherein the middle output end of the gear box 1 is connected with the generator 6, the front and rear two input ends of the high-pressure side of the gear box 1 are respectively provided with the first-stage turbine 2 and the second-stage turbine 3, the first-stage turbine 2 and the second-stage turbine 3 are arranged back to back, the front and rear two input ends of the low-pressure side of the gear box 1 are respectively provided with the third-stage turbine 4 and the fourth-stage turbine 5, the third-stage turbine 4 and the fourth-stage turbine 5 are arranged back to back, the inlet of the first-stage turbine 2 is a high-pressure inlet 7, the outlet of the first-stage turbine 2 is connected with the inlet of the second-stage turbine 3 through a pipeline, the outlet of the third-stage turbine 4 is connected with the inlet of the fourth-stage turbine 5 through a pipeline, and the outlet of the fourth-stage turbine 5 is a low-pressure outlet 8.
The gearbox 1 comprises a box body 11, an output shaft 12, a high-pressure side transmission shaft 13 and a low-pressure side transmission shaft 14, wherein the output shaft 12 is rotatably arranged in the middle of the box body 11, the high-pressure side transmission shaft 13 and the low-pressure side transmission shaft 14 are respectively rotatably matched and arranged in the box body 11 of the gearbox 1, the high-pressure side transmission shaft 13 and the low-pressure side transmission shaft 14 are connected with the output shaft 12 through gear transmission groups, the layout of the shafting is beneficial to controlling the length of a rotor, the impeller is simple in arrangement mode, convenient to assemble and overhaul, and stable and reliable in operation. The gear transmission group comprises an output shaft gear, a high-pressure side transmission shaft gear and a low-pressure side transmission shaft gear, wherein the output shaft gear, the high-pressure side transmission shaft gear and the low-pressure side transmission shaft gear are respectively arranged on the output shaft 12, the high-pressure side transmission shaft 13 and the low-pressure side transmission shaft 14, the high-pressure side transmission shaft gear and the low-pressure side transmission shaft gear are meshed with the output shaft gear, in the operation process, the impellers of the primary turbine 2 and the secondary turbine 3 drive the high-pressure side transmission shaft 13 to rotate, the impellers of the tertiary turbine 4 and the quaternary turbine 5 drive the low-pressure side transmission shaft 14 to rotate, the high-pressure side transmission shaft 13 and the low-pressure side transmission shaft 14 drive the output shaft 12 to rotate through the gear transmission group, the output shaft 12 is connected through the diaphragm coupler generator 6, the output shaft 12 is used for outputting power to the generator 6, and the generator rotor is driven to rotate, so that the power generation is realized. The rotational speeds of the high-pressure side transmission shaft 13 and the low-pressure side transmission shaft 14 are 30000r/min, the rotational speed of the output shaft 12 is 3000r/min, and the gear box transmission ratio is 10:1.
the first-stage turbine 2 comprises a first volute 21 and a first-stage impeller 22, the second-stage turbine 3 comprises a second volute 31 and a second-stage impeller 32, the third-stage turbine 4 comprises a third volute 41 and a third-stage impeller 42, the fourth-stage turbine 5 comprises a fourth volute 51 and a fourth-stage impeller 52, the first volute 21 and the second volute 31 are respectively arranged at the front end and the rear end of the high-pressure side of the gear box 1, the first-stage impeller 22 and the second-stage impeller 32 are respectively arranged in the first volute 21 and the second volute 31, the first-stage impeller 22 and the second-stage impeller 32 are respectively arranged at the two ends of the high-pressure side transmission shaft 13 through pull rod knobs, the third volute 41 and the fourth volute 51 are respectively arranged at the front end and the rear end of the low-pressure side of the gear box 1, the third volute 41 and the fourth-stage impeller 52 are respectively arranged in the third volute 41 and the fourth volute 51, and the third-stage impeller 42 and the fourth-stage impeller 52 are respectively arranged at the two ends of the low-pressure side transmission shaft 14 through the pull rod knobs.
The two ends of the high-pressure side transmission shaft 13 are respectively connected with the first volute 21 and the second volute 31 through a first air sealing structure 91. The two ends of the low pressure side transmission shaft 14 are respectively connected with the third volute 41 and the fourth volute 51 through a second air seal structure 92.
The first volute 21 and the third volute 41 are in sealing connection with the front side of the box body 11 through a front side oil seal mechanism 101. The second volute 31 and the fourth volute 51 are in sealing connection with the rear side of the box body 11 through a rear side oil seal mechanism 102, and support bearings are arranged in the box body 11 close to the front side oil seal mechanism 101 and the rear side oil seal mechanism 102 and used for installing a high-pressure side transmission shaft 13 and a low-pressure side transmission shaft 14. The four-stage impeller, the air seal structure, the oil seal mechanism, the support bearing and gears on the transmission shaft are all coaxially arranged.
The first-stage impeller 22 includes a wheel disc 221, a plurality of moving blades 222, and an annular cover plate 223, where one side of the moving blades 222 is circumferentially and uniformly arranged on the wheel disc 221, the annular cover plate 223 is installed in the first volute 21 located at the other side of the moving blades 222, the second-stage impeller 32, the third-stage impeller 42, and the fourth-stage impeller 52 have the same structural composition as the first-stage impeller 22, but different sizes, multiple air passages are formed among the wheel disc 221, the moving blades 222, and the annular cover plate 223, and the working medium flows through the air passages to expand and do work.
The diameter d1 of the air inlet of the first-stage impeller 22 is 144mm, the diameter d2 of the air inlet of the second-stage impeller 32 is 186mm, the diameter d3 of the air inlet of the third-stage impeller 42 is 230mm, and the diameter d4 of the air inlet of the fourth-stage impeller 52 is 236mm;
the diameter D1 of the hub of the first-stage impeller 22 is 40mm, the diameter D2 of the hub of the second-stage impeller 32 is 40mm, the diameter D3 of the hub of the third-stage impeller 42 is 60mm, and the diameter D4 of the hub of the fourth-stage impeller 52 is 60mm.
The inlet height h1 of the first-stage impeller 22 is 5mm, the inlet height h2 of the second-stage impeller 32 is 5mm, the inlet height h3 of the third-stage impeller 42 is 5mm, and the inlet height h4 of the fourth-stage impeller 52 is 12mm;
the outlet height H1 of the first stage impeller 22 is 11mm, the outlet height H2 of the second stage impeller 32 is 15mm, the outlet height H3 of the third stage impeller 42 is 19.5mm, and the outlet height H4 of the fourth stage impeller 52 is 45mm.
When nitrogen is selected as working medium, the total temperature of the inlet can reach 330 ℃, the total pressure of the inlet can reach 5MPa, the static pressure of the outlet can reach 0.11MPa, the flow can reach 2.43kg/s, the T-s pressure ratio can reach 45.45, and the output power of the device can reach about 700 KW.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.
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 centripetal turbine power generation device suitable for ultralow flow and high pressure ratio is characterized in that: including gearbox (1), one-level turbine (2), second grade turbine (3), tertiary turbine (4), four-level turbine (5) and generator (6), the middle part output of gearbox (1) is connected with generator (6), the front and back two input of gearbox (1) high pressure side are provided with one-level turbine (2) and second grade turbine (3) respectively, the front and back two input of gearbox (1) low pressure side are provided with tertiary turbine (4) and four-level turbine (5) respectively, the entry of one-level turbine (2) is high pressure inlet (7), the export of one-level turbine (2) is through the entry linkage of pipeline with second grade turbine (3), the export of second grade turbine (3) is through the entry linkage of pipeline with three-level turbine (4), the export of three-level turbine (4) is the entry linkage of pipeline with four-level turbine (5), the export of four-level turbine (5) is low pressure outlet (8).
2. A centripetal turbine power generation device suitable for ultra-low flow and high pressure ratio according to claim 1, wherein: the gear box (1) comprises a box body (11), an output shaft (12), a high-pressure side transmission shaft (13) and a low-pressure side transmission shaft (14), wherein the output shaft (12) is rotatably installed in the middle of the box body (11), the high-pressure side transmission shaft (13) and the low-pressure side transmission shaft (14) are respectively installed in the box body (11) on the high-pressure side and the low-pressure side of the gear box (1) in a rotating fit mode, and the high-pressure side transmission shaft (13) and the low-pressure side transmission shaft (14) are connected with the output shaft (12) through gear transmission groups.
3. A centripetal turbine power generation device suitable for ultra-low flow and high pressure ratio according to claim 2, wherein: the first-stage turbine (2) comprises a first volute (21) and a first-stage impeller (22), the second-stage turbine (3) comprises a second volute (31) and a second-stage impeller (32), the third-stage turbine (4) comprises a third volute (41) and a third-stage impeller (42), the fourth-stage turbine (5) comprises a fourth volute (51) and a fourth-stage impeller (52), the first volute (21) and the second volute (31) are respectively arranged at the front end and the rear end of the high-pressure side of the gear box (1), the first volute (21) and the second volute (31) are respectively arranged at the front end and the rear end of the high-pressure side of the first volute (21) and the second volute (31), the first-stage impeller (22) and the second-stage impeller (32) are respectively arranged at the two ends of a high-pressure side transmission shaft (13) through pull rod knobs, the third volute (41) and the fourth volute (51) are respectively arranged at the front end and the rear end of the low-pressure side of the gear box (1), and the third volute (41) and the fourth volute (52) are respectively arranged at the two ends of the low-pressure side of the first volute (41) and the fourth volute (52) through the pull rod knobs respectively.
4. A centripetal turbine power generation apparatus adapted for ultra-low flow, high pressure ratio according to claim 3, wherein: and two ends of the high-pressure side transmission shaft (13) are respectively connected with the first volute (21) and the second volute (31) through a first air sealing structure (91).
5. A centripetal turbine power generation device applicable to ultra-low flow and high pressure ratios according to claim 4, wherein: and two ends of the low-pressure side transmission shaft (14) are respectively connected with the third volute (41) and the fourth volute (51) through a second air seal structure (92).
6. A centripetal turbine power generation device applicable to ultra-low flow and high pressure ratios according to claim 5, wherein: the first volute (21) and the third volute (41) are in sealing connection with the front side of the box body (11) through a front side oil seal mechanism (101).
7. A centripetal turbine power generation device applicable to ultra-low flow and high pressure ratios according to claim 6, wherein: the second volute (31) and the fourth volute (51) are in sealing connection with the rear side of the box body (11) through a rear side oil seal mechanism (102).
8. A centripetal turbine power generation apparatus suitable for ultra-low flow, high-pressure ratios according to claim 7, wherein: the first-stage impeller (22) comprises a wheel disc (221), a plurality of moving blades (222) and an annular cover plate (223), wherein one side of the moving blades (222) is circumferentially and uniformly arranged on the wheel disc (221), and the annular cover plate (223) is arranged in a first volute (21) positioned on the other side of the moving blades (222).
9. A centripetal turbine power generation device applicable to ultra-low flow and high pressure ratio according to claim 8, wherein: the diameter d1 of the air inlet of the first-stage impeller (22) is 144mm, the diameter d2 of the air inlet of the second-stage impeller (32) is 186mm, the diameter d3 of the air inlet of the third-stage impeller (42) is 230mm, and the diameter d4 of the air inlet of the fourth-stage impeller (52) is 236mm;
the diameter D1 of the hub of the first-stage impeller (22) is 40mm, the diameter D2 of the hub of the second-stage impeller (32) is 40mm, the diameter D3 of the hub of the third-stage impeller (42) is 60mm, and the diameter D4 of the hub of the fourth-stage impeller (52) is 60mm.
10. A centripetal turbine power generation apparatus suitable for ultra-low flow, high-pressure ratio according to claim 9, wherein: the inlet height h1 of the first-stage impeller (22) is 5mm, the inlet height h2 of the second-stage impeller (32) is 5mm, the inlet height h3 of the third-stage impeller (42) is 5mm, and the inlet height h4 of the fourth-stage impeller (52) is 12mm;
the outlet height H1 of the first-stage impeller (22) is 11mm, the outlet height H2 of the second-stage impeller (32) is 15mm, the outlet height H3 of the third-stage impeller (42) is 19.5mm, and the outlet height H4 of the fourth-stage impeller (52) is 45mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223275736.9U CN218912975U (en) | 2022-12-07 | 2022-12-07 | Centripetal turbine power generation device suitable for ultralow flow and high pressure ratio |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223275736.9U CN218912975U (en) | 2022-12-07 | 2022-12-07 | Centripetal turbine power generation device suitable for ultralow flow and high pressure ratio |
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| CN218912975U true CN218912975U (en) | 2023-04-25 |
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| CN202223275736.9U Active CN218912975U (en) | 2022-12-07 | 2022-12-07 | Centripetal turbine power generation device suitable for ultralow flow and high pressure ratio |
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