CN113187560A - Multistage combined type vortex expander and metal hydrogen storage material power generation system - Google Patents

Multistage combined type vortex expander and metal hydrogen storage material power generation system Download PDF

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Publication number
CN113187560A
CN113187560A CN202110416941.3A CN202110416941A CN113187560A CN 113187560 A CN113187560 A CN 113187560A CN 202110416941 A CN202110416941 A CN 202110416941A CN 113187560 A CN113187560 A CN 113187560A
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China
Prior art keywords
expander
scroll
stage
working medium
vortex
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CN202110416941.3A
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Chinese (zh)
Inventor
贾鹏
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Shanghai Covapor Energy Technology Co ltd
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Shanghai Covapor Energy Technology Co ltd
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Priority to CN202110416941.3A priority Critical patent/CN113187560A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/02—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F01C1/0207—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F01C1/0215—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F01C1/0223—Rotary-piston machines or engines of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving with symmetrical double wraps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C11/00—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type
    • F01C11/002—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C17/00—Arrangements for drive of co-operating members, e.g. for rotary piston and casing
    • F01C17/02—Arrangements for drive of co-operating members, e.g. for rotary piston and casing of toothed-gearing type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether

Abstract

The invention relates to the technical field of expansion machines, in particular to a multi-stage combined type vortex expansion machine and a metal hydrogen storage material power generation system. The multistage combined scroll expander comprises a sun gear and a plurality of scroll expanders meshed with the sun gear through planetary gears respectively. The multistage combination formula scroll expander that this application embodiment provided sets up a plurality of scroll expander combinations on a plane through sun gear and planetary gear for multistage combination formula scroll expander demonstrates star type structure of arranging, has realized the miniaturized design of expander, has expanded the application occasion of expander. By applying the multistage combined type vortex expander provided by the embodiment of the application and matching with the hydrogen absorption and release functions of the metal hydrogen storage material, high-efficiency work of a high-pressure working medium can be realized, and the safe and high-efficiency utilization of hydrogen energy is realized.

Description

Multistage combined type vortex expander and metal hydrogen storage material power generation system
Technical Field
The invention relates to the technical field of expansion machines, in particular to a multi-stage combined type vortex expansion machine and a metal hydrogen storage material power generation system.
Background
The expander is a machine which utilizes the mechanical work output outwards when the compressed gas is expanded and depressurized to reduce the temperature of the gas so as to obtain energy. Currently, turbo expanders and piston expanders are key devices for obtaining cryogenic temperatures. With the expansion of the application range of the expander and the increasing of the application requirements of people, the two forms of the expander cannot meet the higher requirements of people. The scroll expander has the structural characteristics of the scroll compressor, and the expansion and compression are reversible processes, so that the scroll expander also has the outstanding advantages of high efficiency, high reliability, low energy consumption, low noise, compact structure and the like of the scroll compressor, and can be applied to certain special fields and obtain better effect than expanders with other structural types. The existing various expanders are generally large in size and difficult to apply to small-sized equipment such as mobile phones, watches and the like.
Disclosure of Invention
The application provides a multistage combined type vortex expander and a metal hydrogen storage material power generation system aiming at the problem that the volume of a common expander is large, so that the miniaturization design of the expander is realized, and the application occasion of the expander is expanded.
An embodiment of the present application provides a multi-stage combined scroll expander, including: a sun gear, and a plurality of scroll expanders that are engaged with the sun gear through planetary gears, respectively; the vortex expander is respectively provided with a corresponding air inlet and an air outlet; the air inlet of the primary vortex expander is the air inlet of a multi-stage combined vortex expander; the exhaust port of the last-stage vortex expander is the exhaust port of the multi-stage combined vortex expander.
Furthermore, a working medium reheater is arranged between part or all of the two adjacent stages of vortex expanders.
Further, when a working medium reheater is arranged between two adjacent stages of vortex expanders, an exhaust port of the previous stage of vortex expander is connected with a tube side inlet of the corresponding working medium reheater; connecting a tube pass outlet of a corresponding working medium reheater with an air inlet of a next-stage vortex expander; and a shell pass inlet and a shell pass outlet of the working medium reheater are respectively communicated with air or other heat sources.
Further, the multi-stage combined type vortex expander also comprises a generator; the generator is connected with the sun gear and generates electricity under the driving of the sun gear.
Furthermore, the multistage combined type vortex expander also comprises one or more working medium compressors; the working medium compressor is meshed with the sun gear through the corresponding planetary gear.
Further, the multi-stage combined scroll expander further comprises one or more fans; the fan is meshed with the sun gear through the corresponding planetary gear.
Furthermore, an expander bearing is arranged in the body of the vortex expander, an eccentric output shaft of the vortex expander is fixed through the expander bearing, and one end of the eccentric output shaft is bonded with the corresponding planetary gear; the other end of the eccentric output shaft is connected with a movable scroll disk of the scroll expander; a static vortex disk is arranged at one end of the movable vortex disk, which is not connected with the eccentric output shaft; an air inlet cavity is arranged at one side of the static vortex disc; an air inlet is arranged in the center of the air inlet cavity; an expansion cavity is arranged between the air inlet cavity and the static vortex disc; an exhaust cavity and an exhaust port are arranged on one side of the expansion cavity.
Furthermore, a dynamic seal is arranged at the position where the eccentric output shaft of the vortex expander extends out of the machine body; the movable scroll disk is provided with an automatic transmission prevention mechanism for preventing the movable scroll disk from rotating.
Further, the working medium compressor is a scroll compressor; the fan is a vortex fan.
Further, a vortex expander or a working medium compressor or a fan is arranged on the opposite side of any vortex expander; any vortex expander and the opposite vortex expander or working medium compressor or fan share one planetary gear.
Further, two or more vortex expanders or working medium compressors or fans are connected in series to form a series equipment set; the final-stage devices in two or more series-connected device groups are respectively meshed with the sun gear through corresponding planetary gears.
The embodiment of the application provides another multistage combined type scroll expander, which comprises a plurality of scroll expanders which are arranged on a straight line in series; an eccentric output shaft in each vortex expander is bonded with a corresponding planetary gear; the planetary gears in each vortex expander are respectively meshed with the same transmission intermediate shaft through corresponding transmission gear pairs.
The embodiment of the application provides a multi-stage combined type vortex expander, which comprises two or more series-connected equipment groups; the series equipment groups take the transmission intermediate shaft as a shaft and are uniformly distributed on the circumferential plane; each series equipment group comprises a plurality of vortex expanders which are arranged on a straight line in series; an eccentric output shaft in each vortex expander is bonded with a corresponding planetary gear; the planetary gears in each vortex expander are respectively meshed with the transmission intermediate shaft through corresponding transmission gear pairs.
The embodiment of the application provides a metal hydrogen storage material power generation system, which comprises a protective cover, a material rotating mechanism, a power generator, a multi-stage combined type vortex expander, a storage battery, an electric control unit, a hydrogen absorption pressurizing pump, a nitrogen heat exchanger, an air heat exchange coil, a working medium reheater and a liquid nitrogen pressurizing pump, wherein the material rotating mechanism, the power generator, the multi-stage combined type vortex expander, the storage battery, the electric control unit, the hydrogen absorption pressurizing pump, the nitrogen heat exchanger, the air heat exchange coil, the working medium reheater and the liquid nitrogen pressurizing pump are arranged in the protective cover; the multistage combined scroll expander is the multistage combined scroll expander according to any one of the above embodiments.
In a metal hydrogen storage material power generation system, nitrogen is used as a working medium; in the material rotating mechanism, nitrogen is used as a heat medium, and liquid nitrogen is used as a cold medium; the hot medium outlet of the material rotating mechanism is pressurized by a liquid nitrogen pressurizing pump and then returns to the cold medium inlet of the material rotating mechanism; the nitrogen gas after temperature rise and gasification is discharged from a cold medium outlet of the material rotating mechanism, passes through a nitrogen gas heat exchanger and a shell pass of an air heat exchanger, and is connected with an inlet of a multi-stage combined type vortex expander; the air heat exchange coil in the air heat exchanger is communicated with the air outside the protective cover; the multistage combined type vortex expansion machine is divided into 7 stages, wherein expansion outlets of stages 1, 2, 3, 4 and 5 are respectively connected to corresponding working medium reheaters, and nitrogen enters an expansion inlet of the next stage after being reheated; the 6 th stage expansion outlet of the multi-stage combined type vortex expander is connected with the tube pass inlet of the nitrogen heat exchanger, and the tube pass outlet of the nitrogen heat exchanger is connected with the 7 th stage expansion inlet of the multi-stage combined type vortex expander; a 7 th-stage expansion outlet of the multi-stage combined type vortex expander is connected with a heat medium inlet of the material rotating mechanism, high-temperature and low-pressure nitrogen is conveyed into a heat medium channel of the material rotating mechanism to be cooled and liquefied, and liquid nitrogen is discharged from the heat medium outlet; the hydrogen discharge outlet of the material rotating mechanism returns to the hydrogen absorption inlet of the material rotating mechanism after being pressurized by the hydrogen absorption pressurizing pump.
The multi-stage combined type vortex expander drives the generator therein to run to generate electricity, provides self-electricity and generates electricity outwards; the generator is connected with the storage battery, and the storage battery is connected with each electric equipment through the electric control unit and provides electric energy for each electric equipment.
The multistage combination formula scroll expander that this application embodiment provided sets up a plurality of scroll expander combinations on a plane through sun gear and planetary gear for multistage combination formula scroll expander demonstrates star type structure of arranging, has realized the miniaturized design of expander, has expanded the application occasion of expander. By applying the multistage combined type vortex expander provided by the embodiment of the application and matching with the hydrogen absorption and release functions of the metal hydrogen storage material, high-efficiency work of a high-pressure working medium can be realized, and the safe and high-efficiency utilization of hydrogen energy is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a power generation system using a metal hydrogen storage material according to the present invention;
FIG. 2 is a schematic structural view of a multi-stage combined scroll expander provided in accordance with the present invention;
FIG. 3 is a schematic cross-sectional view of a multi-stage combined scroll expander provided in accordance with the present invention;
FIG. 4 is a schematic cross-sectional view of a scroll expander provided in accordance with the present invention;
FIG. 5 is a schematic view of another multi-stage combined scroll expander provided in accordance with the present invention;
FIG. 6 is a schematic view of a third multi-stage combined scroll expander according to the present invention;
FIG. 7 is a schematic structural view of a fourth multi-stage combined scroll expander according to the present invention;
FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;
FIG. 9 is a schematic view of a fifth multi-stage combined scroll expander according to the present invention;
FIG. 10 is a cross-sectional view taken along line A-A of FIG. 9;
fig. 11 to 15 are schematic diagrams showing changes in hydrogen absorption/desorption operating states of the metal hydrogen storage material used in example 1 of the present application.
Description of reference numerals:
16-material rotating mechanism, 17-generator, 18-multi-stage combined scroll expander, 181-sun gear, 182-planetary gear, 183-scroll expander, 184-working medium compressor, 185-fan, 186-transmission gear pair, 187-transmission intermediate shaft, 1831-body, 1832-expander bearing, 1833-eccentric output shaft, 1834-orbiting scroll, 1835-static scroll, 1836-air inlet cavity, 1837-air inlet, 1838-expansion cavity, 1839-air outlet cavity, 1840-air outlet, 1841-moving seal, 1842-self-transmission preventing mechanism, 19-storage battery, 20-electric control unit, 25-hydrogen suction pressure pump, 27-protective gas inlet, 28-protective cover, 29-gas alarm, 32-nitrogen heat exchanger, 45-air heat exchanger, 46-air heat exchange coil, 47-working medium reheater, and 50-liquid nitrogen pressure pump.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., 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, but 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 invention. 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 invention, it should 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment 1 of the present application provides a metal hydrogen storage material power generation system, as shown in fig. 1, the system includes a protective cover 28, and a material rotation mechanism 16, a power generator 17, a multi-stage combined scroll expander 18, a storage battery 19, an electrical control unit 20, a hydrogen absorption pressure pump 25, a nitrogen gas heat exchanger 32, an air heat exchanger 45, an air heat exchange coil 46, a working medium reheater 47 and a liquid nitrogen pressure pump 50 which are arranged in the protective cover 28.
The material rotating mechanism 16 is provided with a hot medium channel, a cold medium channel and a material interlayer. One side of the material interlayer is provided with a hydrogen absorption inlet, and the other side is provided with a hydrogen discharge outlet; one end of the cold medium channel is provided with a cold medium inlet, and the other end of the cold medium channel is provided with a cold medium outlet; one end of the heat medium channel is provided with a heat medium inlet, and the other end is provided with a heat medium outlet. The material rotating mechanism is used for cooling and liquefying nitrogen entering from a heat medium inlet when hydrogen is discharged at low temperature and low pressure to absorb heat; and the material rotating mechanism is used for heating and gasifying liquid nitrogen entering from the cold medium inlet when absorbing hydrogen at relatively high temperature and high pressure and releasing heat. The hydrogen absorption working condition of the metal hydrogen storage material in the material interlayer of the material rotating mechanism is as follows: 160 ℃ below zero, 0.4MPa and the hydrogen discharge working condition is as follows: -200 ℃ and 0.1 MPa.
In the metallic hydrogen storage material power generation system shown in fig. 1, nitrogen is used as a working medium. In the material rotating mechanism, nitrogen gas was used as a heat medium and liquid nitrogen was used as a cold medium. The hot medium outlet of the material rotating mechanism is pressurized by a liquid nitrogen pressurizing pump 50 and then returns to the cold medium inlet of the material rotating mechanism. The nitrogen gas after temperature rise and gasification is discharged from a cold medium outlet of the material rotating mechanism, passes through a nitrogen gas heat exchanger 32 and a shell pass of an air heat exchanger 45, and is connected with an inlet of the multistage combined type vortex expander 18. The air heat exchange coil 46 inside the air heat exchanger 45 communicates with the air outside the protective cover 28.
The multistage combined type vortex expander 18 is divided into 7 stages, wherein expansion outlets of the 1 st stage, the 2 nd stage, the 3 rd stage, the 4 th stage and the 5 th stage are respectively connected to corresponding working medium reheaters 47, and nitrogen enters an expansion inlet of the next stage after being reheated. The 6 th stage expansion outlet of the multi-stage combined type vortex expansion machine 18 is connected with the tube side inlet of the nitrogen heat exchanger 32, and the tube side outlet of the nitrogen heat exchanger 32 is connected with the 7 th stage expansion inlet of the multi-stage combined type vortex expansion machine 18. And a 7 th-stage expansion outlet of the multi-stage combined type vortex expansion machine 18 is connected with a heat medium inlet of the material rotating mechanism, high-temperature low-pressure nitrogen is conveyed into a heat medium channel of the material rotating mechanism to be cooled and liquefied, and liquid nitrogen is discharged from the heat medium outlet. The hydrogen discharge outlet of the material rotating mechanism is pressurized by a hydrogen absorption pressurizing pump 25 and then returns to the hydrogen absorption inlet of the material rotating mechanism.
The multistage combined type vortex expander 18 drives the generator 17 to operate to generate electricity, and self electricity and external electricity are supplied. The generator 17 is connected to a storage battery 19, and the storage battery 19 is connected to each electric device, such as a pump, via an electric control unit 20, and supplies the generated electric power to each electric device in the metal hydrogen storage material power generation system.
For the metal hydrogen storage material power generation system shown in fig. 1, the operation process is as follows:
liquid nitrogen with a thermal medium outlet of 1.02kg/s and a temperature of-200 ℃ and a pressure of 0.06MPa is pressurized to a temperature of-199.62 ℃ and a pressure of 1.7MPa by a liquid nitrogen pressurizing pump 50 and then enters a cold medium inlet of the material rotating mechanism 16. Liquid nitrogen with the temperature of 1.02kg/s, -199.62 ℃ and 1.7MPa absorbs heat released when the metal hydrogen storage material absorbs hydrogen in the cold medium channel, and is discharged from the cold medium outlet of the material rotating mechanism 16 after being gasified and heated to-160 ℃ and 1.7 MPa. 1.02kg/s, -160 ℃ and 1.7MPa nitrogen firstly passes through the shell pass of the nitrogen heat exchanger 32 to be heated to-33.6 ℃, and then passes through the shell pass of the air heat exchanger 45 to be heated to 20 ℃. 1.02kg/s, 20 ℃ and 1.7MPa nitrogen enters a multistage combined type vortex expander 18, and is expanded to 1.3MPa, 1MPa, 0.77MPa, 0.59MPa and 0.45MPa in a grading way through stages 1, 2, 3, 4 and 5; after each stage of expansion, the expansion is reheated to 20 ℃ by a working medium reheater 47. Introducing nitrogen gas with the temperature of 20 ℃ and the pressure of 0.45MPa into the 6 th stage of expansion to 0.32MPa and minus 3.24 ℃; then the tube side of the nitrogen heat exchanger 32 exchanges heat with nitrogen with the shell side of-160 ℃ and 1.7MPa, and the nitrogen is cooled to-150 ℃. The nitrogen gas with the temperature of 150 ℃ below zero and the pressure of 0.32MPa finally enters the 7 th stage of expansion of the multi-stage combined vortex expander 18 and is expanded to 190.66 ℃ below zero and the pressure of 0.06 MPa. 1.02kg/s, -190.66 ℃ and 0.06MPa of nitrogen from the multistage combined type vortex expander 18 enters the heat medium channel from the heat medium inlet of the material rotating mechanism 16 for cooling and liquefaction, and finally liquid nitrogen with the temperature of 1.02kg/s, -200 ℃ and 0.06MPa flows out from the heat medium outlet. The hydrogen discharge outlet of the material rotating mechanism 16 is pressurized by a hydrogen absorption pressurizing pump 25 and then returns to the hydrogen absorption inlet of the material rotating mechanism 16, and the hydrogen absorption/hydrogen discharge rate is 0.0242 kg/s. The multi-stage combined type vortex expander 18 drives the generator 17 to operate to generate electricity, provide self electricity and provide electric energy to the outside.
As the multistage combined scroll expander 18 in embodiment 1, a structure as shown in fig. 2 can be adopted. In the multistage combined scroll expander shown in fig. 2, a sun gear 181 is provided, and a plurality of scroll expanders 183 which are engaged with the sun gear 181 through planetary gears 182, respectively.
The scroll expander 183 is provided with a corresponding air inlet and an air outlet respectively; the air inlet of the primary scroll expander 183 is the air inlet of a multi-stage combined scroll expander; the exhaust port of the scroll expander 183 is an exhaust port of a multistage combined scroll expander.
In order to improve the efficiency of working medium expansion work, a working medium reheater 47 may be disposed between part or all of the adjacent two-stage scroll expanders 183. When the working medium reheater 47 is arranged between two adjacent stages of the scroll expanders 183, the exhaust port of the previous stage of the scroll expander 183 can be connected with the tube side inlet of the corresponding working medium reheater 47; and connecting the tube side outlet of the corresponding working medium reheater 47 with the air inlet of the next-stage scroll expander 183. And a shell-side inlet and a shell-side outlet of the working medium reheater 47 are respectively communicated with air or other heat sources.
As shown in fig. 3, the multi-stage combined scroll expander further includes a generator 17. The generator 17 is connected to the sun gear 181, and generates electricity by being driven by the sun gear 181.
In addition to scroll expanders, one or more working fluid compressors 184 and fans 185 may be provided in a multi-stage combined scroll expander. Working medium compressor 184 and fan 185 also mesh with sun gear 181 via respective planetary gears 182. Specifically, working medium compressor 184 can be a scroll compressor, and fan 185 is a scroll fan; other forms of compressors and fans can be selected according to actual needs.
Fig. 4 shows the structure of scroll expander 183. As shown in fig. 4, an expander bearing 1832 is provided in a body 1831 of the scroll expander 183, an eccentric output shaft 1833 of the scroll expander 183 is fixed by the expander bearing 1832, and one end of the eccentric output shaft 1833 is bonded to the corresponding planetary gear 182. The other end of the eccentric output shaft 1833 is connected to the orbiting scroll 1834 of the scroll expander 183; a fixed scroll 1835 is provided at an end of the orbiting scroll 1834 not connected to the eccentric output shaft 1833.
An intake chamber 1836 is provided at one side of the fixed scroll 1835. An air inlet 1837 is provided in the center of the air inlet chamber 1836. An expansion chamber 1838 is provided between the intake chamber 1836 and the fixed scroll 1835. An exhaust cavity 1839 and an exhaust port 1840 are provided on one side of the expansion cavity 1838.
A dynamic seal 1841 is provided where the eccentric output shaft 1833 of the scroll expander 183 extends out of the body 1831. An automatic transmission preventing mechanism 1842 is provided on the orbiting scroll 1834 to prevent the orbiting scroll 1834 from rotating.
In one embodiment, as shown in FIG. 5, a scroll expander 183 or a working medium compressor 184 or a fan 185 may be provided on the opposite side of either scroll expander 183. The vortex expander 183 and the opposite vortex expander 183, working medium compressor 184 or fan 185 share a planet gear 182.
The scroll expanders shown in fig. 4 can also be combined to form a tandem multi-stage combined scroll expander as shown in fig. 6. As shown in fig. 6, the tandem type multistage combination type scroll expander may include a plurality of scroll expanders 183 arranged in a line. The eccentric output shaft 1833 of each scroll expander 183 is keyed to its corresponding planetary gear 182, and the planetary gear 182 of each scroll expander 183 is engaged with the same drive intermediate shaft 187 through a corresponding pair of drive gears 186.
In addition to the series scroll expanders, one or more working fluid compressors 184 and fans 185 may be incorporated into the multi-stage combined scroll expander shown in fig. 6. Correspondingly, working medium compressor 184 and fan 185 are also meshed with a transmission intermediate shaft 187 through corresponding planetary gear 182 and transmission gear pair 186.
In one embodiment, as shown in FIG. 7, the tandem combination scroll expander of FIG. 6 may be combined with the radial combination scroll expander of FIG. 2 to form a tandem arrangement in a radial arrangement. Specifically, two or more of scroll expander 183, working medium compressor 184, and fan 185 may be connected in series to form a series of series connected plant groups. In each series-connected plant group, the individual plants may be connected in the manner described with reference to figure 6 for the combined scroll expander in series. The specific series connection mode can be seen in fig. 8, and fig. 8 is a sectional view along the direction of a-a in fig. 7. The final stage devices of two or more series device groups are respectively meshed with the sun gear 181 through the corresponding planetary gears 182.
In the solution shown in fig. 7, each series group of three devices is formed by connecting three devices in series, and the three series groups of devices are engaged with the same sun gear 181 through respective planetary gears 182.
In another embodiment, as shown in FIG. 9, a plurality of the tandem compound scroll expanders of FIG. 6 may also be arranged in a star configuration. First, referring to the tandem combined scroll expander shown in fig. 6, a plurality of scroll expanders 183 arranged in series on a straight line are combined into a set of tandem equipment groups, and each set of the tandem equipment groups is uniformly distributed on a circumferential plane with a transmission intermediate shaft 187 as an axis. In fig. 9, three sets of series-connected equipment sets are provided, which are uniformly distributed on a circumferential plane with the intermediate transmission shaft 187 as an axis, and the included angle between each set of series-connected equipment sets is 120 °.
Fig. 10 is a sectional view taken along the line a-a in fig. 9. As shown in fig. 10, in each series-connected equipment group, a plurality of scroll expanders 183 are arranged in series on a straight line, an eccentric output shaft 1833 of each scroll expander 183 is bonded to its corresponding planetary gear 182, and the planetary gear 182 of each scroll expander 183 is engaged with a transmission intermediate shaft 187 through a corresponding transmission gear pair 186. In each scroll expander described in fig. 10, the planetary gear 182 is a drive gear.
In practical applications, one or more working medium compressors 184 and fans 185 may be connected in series in the series-connected equipment group. Correspondingly, working medium compressor 184 and fan 185 in each series equipment group are also meshed with a transmission intermediate shaft 187 through a corresponding planetary gear 182 and a corresponding transmission gear pair 186.
In the multi-stage combined scroll expander shown in fig. 9 and 10, a generator 17 may be further provided at one end of the drive intermediate shaft 187, and the generator 17 generates electricity by being driven by the drive intermediate shaft 187.
The above examples are merely illustrative for clarity and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (14)

1. A multi-stage combined scroll expander, comprising: a sun gear (181), and a plurality of scroll expanders (183) that are engaged with the sun gear (181) via planetary gears (182), respectively;
the vortex expander (183) is respectively provided with a corresponding air inlet and an air outlet; the air inlet of the primary vortex expander (183) is the air inlet of the multi-stage combined vortex expander; and the exhaust port of the final-stage scroll expander (183) is the exhaust port of the multi-stage combined scroll expander.
2. The multi-stage combined scroll expander according to claim 1, wherein a working medium reheater (47) is provided between part or all of the adjacent two-stage scroll expanders (183).
3. The multi-stage combined scroll expander according to claim 2, wherein when the working medium reheater (47) is provided between the adjacent two stages of scroll expanders (183), the exhaust port of the previous stage of scroll expander (183) is connected to the tube side inlet of the corresponding working medium reheater (47); connecting a tube pass outlet of a corresponding working medium reheater (47) with an air inlet of a next-stage vortex expander (183); and a shell-side inlet and a shell-side outlet of the working medium reheater (47) are respectively communicated with air or other heat sources.
4. The multi-stage combined scroll expander of claim 3, further comprising an electrical generator (17); the generator (17) is connected with the sun gear (181) and generates electricity under the driving of the sun gear (181).
5. The multi-stage combined scroll expander of claim 4, further comprising one or more working medium compressors (184); the working medium compressor (184) is meshed with the sun gear (181) through the corresponding planetary gear (182).
6. The multi-stage combined scroll expander of claim 5, further comprising one or more fans (185); the fans (185) are engaged with the sun gear (181) through corresponding planetary gears (182).
7. The multi-stage combined scroll expander according to claim 6, wherein an expander bearing (1832) is provided in the body (1831) of the scroll expander (183), the eccentric output shaft (1833) of the scroll expander (183) is fixed by the expander bearing (1832), and one end of the eccentric output shaft (1833) is bonded to its corresponding planetary gear (182);
the other end of the eccentric output shaft (1833) is connected with a movable scroll plate (1834) of the scroll expander (183); a fixed scroll disk (1835) is arranged at one end of the movable scroll disk (1834) which is not connected with the eccentric output shaft (1833);
an air inlet cavity (1836) is arranged at one side of the fixed scroll disk (1835); an air inlet (1837) is arranged in the center of the air inlet cavity (1836); an expansion cavity (1838) is arranged between the air inlet cavity (1836) and the fixed scroll disk (1835); an exhaust cavity (1839) and an exhaust port (1840) are disposed at one side of the expansion cavity (1838).
8. The multi-stage combined scroll expander according to claim 7, wherein a dynamic seal (1841) is provided where the eccentric output shaft (1833) of the scroll expander (183) protrudes from the body (1831);
and an automatic transmission prevention mechanism (1842) is arranged on the movable scroll (1834) and is used for preventing the movable scroll (1834) from rotating.
9. The multi-stage combined scroll expander of claim 8, wherein said working medium compressor (184) is a scroll compressor; the fan (185) is a vortex fan.
10. A multi-stage combined scroll expander according to claim 9, wherein a scroll expander (183) or a working medium compressor (184) or a fan (185) is provided on the opposite side of any scroll expander (183); any vortex expander (183) and the opposite vortex expander (183) or working medium compressor (184) or fan (185) share one planetary gear (182).
11. The multi-stage combined scroll expander of claim 9, wherein two or more scroll expanders (183) or working fluid compressors (184) or fans (185) are connected in series to form a series of series connected groups of devices; the final devices in two or more series device groups are respectively meshed with the sun gear (181) through corresponding planetary gears (182).
12. A multi-stage combined scroll expander comprising a plurality of scroll expanders (183) arranged in series in a line; an eccentric output shaft (1833) in each scroll expander (183) is keyed to its corresponding planetary gear (182); planetary gears (182) in the scroll expanders (183) are engaged with the same transmission intermediate shaft (187) through corresponding transmission gear pairs (186).
13. A multi-stage combined type vortex expander is characterized by comprising two or more series-connected equipment groups; the series equipment groups take a transmission intermediate shaft (187) as an axis and are uniformly distributed on a circumferential plane;
each series-connected equipment group comprises a plurality of vortex expanders (183) which are arranged in series on a straight line; an eccentric output shaft (1833) in each scroll expander (183) is keyed to its corresponding planetary gear (182); the planetary gears (182) in the scroll expanders (183) are respectively meshed with the transmission intermediate shaft (187) through corresponding transmission gear pairs (186).
14. A metal hydrogen storage material power generation system is characterized by comprising a protective cover (28), a material rotating mechanism, a power generator (17), a multi-stage combined type vortex expander (18), a storage battery (19), an electric control unit (20), a hydrogen absorption pressure pump (25), a nitrogen heat exchanger (32), an air heat exchanger (45), an air heat exchange coil (46), a working medium reheater (47) and a liquid nitrogen pressure pump (50), wherein the material rotating mechanism, the power generator (17), the multi-stage combined type vortex expander, the storage battery (19), the electric control unit (20), the hydrogen absorption pressure pump (25), the nitrogen heat exchanger (32), the air heat exchanger (45), the air heat exchange coil (46), the working medium reheater and the liquid nitrogen pressure pump (50) are arranged in the protective cover (28);
the multi-stage combined scroll expander (18) as claimed in any one of claims 1 to 13;
in the metal hydrogen storage material power generation system, nitrogen is used as a working medium; in the material rotating mechanism, nitrogen is used as a heat medium, and liquid nitrogen is used as a cold medium; the hot medium outlet of the material rotating mechanism is pressurized by a liquid nitrogen pressurizing pump (50) and then returns to the cold medium inlet of the material rotating mechanism; the nitrogen gas after temperature rise and gasification is discharged from a cold medium outlet of the material rotating mechanism, passes through a nitrogen gas heat exchanger (32) and a shell pass of an air heat exchanger (45), and is connected with an inlet of a multi-stage combined type vortex expander (18); an air heat exchange coil (46) in the air heat exchanger (45) is communicated with the air outside the protective cover (28); the multistage combined type vortex expansion machine (18) is divided into 7 stages, wherein expansion outlets of the 1 st stage, the 2 nd stage, the 3 rd stage, the 4 th stage and the 5 th stage are respectively connected to a corresponding working medium reheater (47), and nitrogen enters an expansion inlet of the next stage after being reheated; the 6 th stage expansion outlet of the multi-stage combined type vortex expansion machine (18) is connected with the tube pass inlet of the nitrogen heat exchanger (32), and the tube pass outlet of the nitrogen heat exchanger (32) is connected with the 7 th stage expansion inlet of the multi-stage combined type vortex expansion machine (18); a 7 th stage expansion outlet of the multi-stage combined type vortex expander (18) is connected with a heat medium inlet of the material rotating mechanism, high-temperature and low-pressure nitrogen is conveyed into a heat medium channel of the material rotating mechanism for cooling and liquefying, and liquid nitrogen is discharged from the heat medium outlet; the hydrogen discharge outlet of the material rotating mechanism is pressurized by a hydrogen absorption pressurizing pump (25) and then returns to the hydrogen absorption inlet of the material rotating mechanism;
the multistage combined type vortex expander (18) drives a generator (17) therein to run for generating electricity, so that self electricity is provided and electricity is generated outwards; the generator (17) is connected to a battery (19), and the battery (19) is connected to each electric device via an electric control unit (20) and supplies electric power to each electric device.
CN202110416941.3A 2021-04-19 2021-04-19 Multistage combined type vortex expander and metal hydrogen storage material power generation system Pending CN113187560A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114607596A (en) * 2022-03-30 2022-06-10 山东科技大学 Non-afterburning type vortex compression and expansion integrated multi-shaft output device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114607596A (en) * 2022-03-30 2022-06-10 山东科技大学 Non-afterburning type vortex compression and expansion integrated multi-shaft output device
CN114607596B (en) * 2022-03-30 2022-12-02 山东科技大学 Non-complementary combustion type vortex compression and expansion integrated multi-shaft output device

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