An expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling

Abstract

The present invention discloses an expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling, comprising: an outer shell, an expansion scroll, a compression scroll, a planetary gear and a motor; the outer shell is divided into an upper and lower part, the upper part has an expansion scroll, a planetary gear and a compression scroll in order along the axial direction, and the outer shell is also provided with two air inlets, two exhaust ports and two pressure regulating ports; the lower part is provided with a driving motor connected to the planetary gear, and the expansion scroll and the compression scroll are connected to the planetary gear. The present invention adopts vortex expansion and vortex compression to make the structure more efficient and compact; and through the elastic design of the static disk vortex, the expansion ratio / compression ratio can be continuously adjusted; at the same time, the expansion work is coupled with the motor input work through the planetary gear, and the coupled work is output to the compression process, thereby directly reducing the cycle power consumption, improving the system energy efficiency, and increasing the system refrigeration capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration and air conditioning, and in particular to an expansion-compression integrated machine capable of continuously adjusting working conditions based on speed coupling. Background Art

[0002] Steam compression refrigeration has always been one of the most important and widely used refrigeration methods in refrigeration and air-conditioning technology. The basic steam compression refrigeration cycle generally has the following four processes: 1) Compression process. The medium-temperature and low-pressure refrigerant vapor coming out of the evaporator is compressed into high-temperature and high-pressure superheated vapor in the compressor; 2) Heat release process. The high-temperature and high-pressure steam coming out of the compressor enters the condenser to release heat. In this process, the refrigerant vapor releases heat to the outside, thereby lowering the temperature, and condenses into liquid under saturated pressure; 3) Throttling process. The refrigerant after heat release and condensation passes through the throttling device and begins the throttling expansion process. The pressure and temperature are reduced, and it becomes a low-temperature and low-pressure liquid and enters the evaporator; 4) Heat absorption process. The low-temperature and low-pressure liquid refrigerant absorbs heat and evaporates in the evaporator to become refrigerant vapor.

[0003] According to the refrigeration conditions and the different thermal properties of the refrigerant, the vapor compression refrigeration cycle can be divided into subcritical cycle, transcritical cycle and supercritical cycle. For the vapor compression refrigeration cycle with Freon as the refrigerant, most of them belong to subcritical cycle, while for working fluids such as carbon dioxide, due to the high critical temperature and critical pressure (the critical temperature of carbon dioxide is 31.1℃, and the critical pressure is 7.3MPa), the heat release process usually takes place in the supercritical region, so most of them are transcritical cycle or supercritical cycle. Regardless of the form of refrigeration cycle, the throttling process is generally carried out in the throttling valve. The throttling process is essentially an irreversible isenthalpic process. This irreversible process will cause serious energy loss, especially for the transcritical cycle of working fluids such as carbon dioxide. The pressure difference before and after throttling is large, and the irreversible loss is large.

[0004] The expander is a device that can recover energy (expansion work) during the throttling process. After the high-pressure and high-temperature refrigerant vapor enters the expander, the pressure and temperature decrease, and at the same time, the thermodynamic energy of the gas is converted into kinetic energy to output the expansion work. The output of the expansion work can significantly reduce the overall power consumption of the refrigeration system, which is of great significance for improving the energy efficiency of the refrigeration cycle system.

[0005] At present, the application of expander technology in refrigeration cycles faces some problems. First, the traditional common turbine expander is often only suitable for large refrigeration units due to its large size; second, the expansion work output by the expander cannot be integrated with the input work of the compressor, resulting in a complex system structure and low energy utilization efficiency; in addition, traditional expanders are generally mechanical devices designed under standard conditions. When the system operates under non-design conditions, there are over-expansion and under-expansion in the expander. A motorless variable expansion ratio scroll expander compressor and its heat pump system (201911288781.8). The invention sets three air intake ports on the expansion side to achieve three different expansion ratio conditions, and sets three exhaust ports on the compression side to achieve three different compression ratio conditions. The invention essentially designs three operating conditions for the expander and compressor, and cannot achieve continuous adjustment of the expansion condition. When the operating condition deviates from the design condition, the system performance will be greatly reduced. In addition, the expansion side and the compression side of the invention are coaxially linked, and the expansion disk and the compression disk are connected at the same speed through a connecting shaft, which will cause the problem of flow imbalance between the expansion side and the compression side in the refrigeration cycle. Therefore, how to design an expansion-compression integrated machine that can continuously adjust the working conditions, couple the expansion recovery work with the compressor power consumption, and has a compact and efficient structure is the key technical problem to be solved by the present invention. Summary of the invention

[0006] The purpose of the present invention is to solve the above-mentioned key technical problems and to provide an all-in-one expansion-compression machine with continuously adjustable working conditions based on speed coupling, which adopts vortex expansion and vortex compression to make the structure more efficient and compact; and through the elastic design of the static disk vortex, the expansion ratio / compression ratio can be continuously adjusted; at the same time, the expansion work is coupled with the motor input work through planetary gears, and then output to the compression process after coupling, thereby directly reducing the cycle power consumption, improving the system energy efficiency, and increasing the system refrigeration capacity.

[0007] The present invention is achieved by at least one of the following technical solutions.

[0008] An expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling comprises an outer shell, which is divided into an upper and lower part. An expansion scroll, a planetary gear and a compression scroll are arranged in sequence along the axial direction in the upper part; an expansion and compression air inlet, an expansion and compression air outlet and a pressure regulating port are also arranged on the outer shell; a driving motor connected to the planetary gear is arranged in the lower part, and the expansion scroll and the compression scroll are connected to the planetary gear.

[0009] Furthermore, a heat insulating material is provided between the expansion scroll and the planetary gear, and between the planetary gear and the compression scroll.

[0010] Further, the expansion scroll includes an expansion stator, an expansion rotor and an expansion cross;

[0011] The expansion movable plate and the expansion static plate are assembled with a phase difference of 180 degrees, and the bottom surface of the expansion movable plate presses the expansion cross.

[0012] Further, the expansion stator includes an expansion stator end cover and an expansion stator vortex;

[0013] The expansion and stator plate end cover is connected to the upper half of the outer shell by fixing screws, and the expansion and stator plate end cover is provided with an expansion and stator plate pressure chamber, which is a spiral structure, and its structural dimensions match the expansion and stator plate vortex;

[0014] The expansion and static disk vortex is an elastic spiral structure, which is gradually pressed down under the pressure of the expansion and static disk pressure chamber. / bomb The expansion and static disk end cover is matched with the expansion and static disk pressure chamber on the expansion and static disk end cover, and the expansion and static disk end cover is partially embedded in the expansion and static disk pressure chamber.

[0015] Further, the compression scroll plate includes a compression stator plate, a compression movable plate and a compression cross;

[0016] The compression movable plate and the compression static plate are assembled with a phase difference of 180 degrees, and the bottom surface of the compression movable plate presses the compression cross.

[0017] Further, the compression stator includes a compression stator end cover and a compression stator scroll;

[0018] The compression stator end cover is connected to the upper half of the outer shell by fixing screws, and the compression stator end cover is provided with a compression stator pressure chamber, which is a spiral structure, and its structural dimensions match the compression stator vortex;

[0019] The compression stator vortex is an elastic spiral structure, which is gradually pressed down / bounced up under the pressure of the compression stator pressure chamber, and matches the compression stator pressure chamber on the compression stator end cover, and the compression stator end cover is partially embedded in the compression stator pressure chamber.

[0020] Further, the planetary gear comprises a sun gear, a planetary gear, a planetary gear carrier and a ring gear;

[0021] The sun gear and the ring gear are located on both sides of the planetary gear; the sun gear is connected to the expansion disk of the expansion scroll through a transmission shaft; the ring gear is connected to the compression disk of the compression scroll through a transmission shaft;

[0022] The planetary gear is located between the sun gear and the ring gear, and the planetary gear is connected to the planetary gear carrier via a connecting shaft on the planetary gear carrier;

[0023] The outer edge of the planetary gear carrier is also provided with a helical gear; the motor transmission gear of the drive motor is meshed with the helical gear.

[0024] Furthermore, an air inlet connected to the expansion air inlet on the outer shell is provided at the center of the expansion stator disk;

[0025] An exhaust port connected to the expansion exhaust port on the outer shell is provided at the outermost edge of the expansion stator;

[0026] The expansion and static disk is also provided with a pressure regulating port which is in communication with the pressure regulating port of the expansion and static disk on the outer shell.

[0027] Furthermore, an air inlet connected to the compression air inlet on the outer shell is provided at the center of the compression stator disk;

[0028] An exhaust port connected to the compression exhaust port on the outer shell is provided at the outermost edge of the compression stator;

[0029] The compression stator plate is also provided with a pressure regulating port which is in communication with the compression stator plate pressure regulating port on the outer shell.

[0030] Further, the motor includes a motor stator, a motor rotor and a motor transmission gear;

[0031] The motor stator is fixed to the lower half of the outer shell;

[0032] The motor rotor is connected to the motor transmission gear via a motor transmission shaft;

[0033] The motor transmission gear is meshed with the helical gear on the outer edge of the planetary gear carrier.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The unique design of the expansion scroll and the compression scroll allows for continuous adjustment of the expansion ratio and the compression ratio by adjusting the pressure in the static disk pressure chamber to adapt to changes in operating conditions. At the same time, the planetary gears are used to couple the expansion recovery work with the motor input work to reduce the total power consumption of the refrigeration cycle system. The expansion process is closer to isentropic expansion than the traditional throttling isenthalpic process, which can significantly increase the system's refrigeration capacity, thereby improving the system energy efficiency of the steam compression refrigeration cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief description of the drawings required for the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0037] Figure 1 It is a schematic diagram of the overall structure of the expansion-compression integrated machine of the present invention that can continuously adjust the working conditions based on speed coupling.

[0038] Figure 2a It is a schematic diagram of the expansion ratio adjustment of the expansion-compression integrated machine based on the speed coupling and continuously adjustable working condition of the present invention.

[0039] Figure 2b It is a schematic diagram of the expansion ratio adjustment of the expansion-compression integrated machine based on the speed coupling and continuously adjustable working condition of the present invention.

[0040] Figure 3a It is a schematic diagram of compression ratio adjustment of an expansion-compression integrated machine based on a speed-coupled continuously adjustable working condition of the present invention.

[0041] Figure 3b It is a schematic diagram of compression ratio adjustment of an expansion-compression integrated machine based on a speed-coupled continuously adjustable working condition of the present invention.

[0042] Figure 4a It is a front view of the planetary gear structure of the expansion-compression integrated machine of the present invention that can continuously adjust the working condition based on speed coupling.

[0043] Figure 4b It is a cross-sectional view in the AA direction of the planetary gear structure of the expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling according to the present invention.

[0044] Figure 4c It is a cross-sectional view in the BB direction of the planetary gear structure of the expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling of the present invention;

[0045] Figure markings: 1-expansion exhaust port, 2-planetary gear carrier, 3-planetary gear, 4-ring gear, 5-insulation material, 6-compression air inlet, 7-outer shell, 8-fixing screw, 9-compression static disk end cover, 10-compression static disk vortex, 11-compression static disk pressure chamber, 12-compression moving disk, 13-compression static disk pressure regulating port, 14-compression exhaust port, 15-transmission shaft between ring gear and compression moving disk, 16-compression cross, 17-motor transmission gear, 18-motor transmission shaft, 19-motor stator, 20-motor rotor, 21-expansion cross, 22-expansion static disk vortex, 23-sun gear, 201-planetary gear carrier chassis, 202-connecting shaft, 203-helical gear, 24-transmission shaft between expansion moving disk and sun gear, 25-expansion static disk pressure regulating port, 26-expansion air inlet, 27-expansion static disk pressure chamber, 28-expansion moving disk, 29-expansion static disk end cover. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

[0047] This embodiment takes a carbon dioxide transcritical refrigeration cycle as a specific implementation object, and it can be extended to vapor compression refrigeration cycles of other refrigerants according to actual conditions.

[0048] An expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling comprises an outer shell, which is divided into an upper and lower part. An expansion scroll, a planetary gear and a compression scroll are sequentially arranged in the axial direction in the upper part, and an expansion and compression air inlet, an expansion and compression air outlet and a pressure regulating port are also arranged on the outer shell. A driving motor is arranged in the lower part. Insulating materials are arranged between the expansion scroll and the planetary gear, and between the planetary gear and the compression scroll.

[0049] The expansion scroll comprises an expansion stator, an expansion rotor and an expansion cross; the expansion rotor and the expansion stator are assembled with a phase difference of 180 degrees, and the bottom surface of the expansion rotor presses the expansion cross.

[0050] The expansion stator includes an expansion stator end cover and an expansion stator vortex, wherein the expansion stator end cover is connected to the upper half of the outer shell by fixing screws, and an expansion stator pressure chamber is provided on the expansion stator end cover, the chamber is a spiral structure, and its structural dimensions match those of the expansion stator vortex;

[0051] The expansion and static disk vortex is an elastic spiral structure, which is gradually pressed down / bounced up under the pressure of the expansion and static disk pressure chamber, and matches the expansion and static disk pressure chamber on the expansion and static disk end cover, and the expansion and static disk end cover is partially embedded in the expansion and static disk pressure chamber.

[0052] The compression scroll plate includes a compression stator plate, a compression movable plate and a compression cross; the compression movable plate and the compression stator plate are assembled with a phase difference of 180 degrees, and the bottom surface of the compression movable plate presses the compression cross.

[0053] The compression stator comprises a compression stator end cover and a compression stator vortex, wherein the compression stator end cover is connected to the upper half of the outer shell by fixing screws, and a compression stator pressure chamber is provided on the compression stator end cover, and the chamber is a spiral structure, and its structural dimensions match those of the compression stator vortex;

[0054] The compression stator vortex is an elastic spiral structure, which is gradually pressed down / springs up under the pressure of the compression stator pressure chamber, and matches the compression stator pressure chamber on the compression stator end cover, and the compression stator end cover is partially embedded in the compression stator pressure chamber;

[0055] The planetary gear comprises a sun gear, a planetary gear, a planetary gear carrier and a ring gear;

[0056] The sun gear is located inside the planetary gear and is connected to the expansion disk via a transmission shaft;

[0057] The ring gear is located outside the planetary gear and is connected to the compression movable plate through a transmission shaft;

[0058] The planetary gear is located between the sun gear and the ring gear, and the planetary gear is connected to the planetary gear carrier via a connecting shaft on the planetary gear carrier;

[0059] The outer edge of the planetary gear carrier is also provided with a helical gear;

[0060] An air inlet connected to the expansion air inlet on the outer shell is provided at the center of the expansion stator;

[0061] An exhaust port connected to the expansion exhaust port on the outer shell is provided at the outermost edge of the expansion stator;

[0062] The expansion and static disk is also provided with a pressure regulating port which is connected with the pressure regulating port of the expansion and static disk on the outer shell;

[0063] An air inlet connected to the compression air inlet on the outer shell is provided at the center of the compression stator disk;

[0064] An exhaust port connected to the compression exhaust port on the outer shell is provided at the outermost edge of the compression stator;

[0065] The compression stator plate is also provided with a pressure regulating port which is in communication with the compression stator plate pressure regulating port on the outer shell.

[0066] The motor comprises a motor stator, a motor rotor and a motor transmission gear;

[0067] The motor stator is fixed to the lower half of the outer shell;

[0068] The motor rotor is connected to the motor transmission gear via a motor transmission shaft;

[0069] The motor transmission gear is meshed with the helical gear on the outer edge of the planetary gear carrier.

[0070] The expansion scroll, the planetary gear, the compression scroll, the transmission shaft and the gear are made of metal materials such as stainless steel or aluminum alloy;

[0071] The pressure in the pressure chamber of the expansion static disk is regulated by mechanical pressure or other pressure regulating methods;

[0072] The pressure in the compression static disk pressure chamber is regulated by mechanical pressure, liquid pressure or gas pressure.

[0073] The expansion work is coupled with the motor input work through the planetary gear, and they are used as the input work on the compression side. At the same time, the static disk is designed to be elastic, and the expansion ratio / compression ratio can be continuously adjusted. In the steam refrigeration cycle, the medium-temperature and high-pressure refrigerant from the condenser (subcritical cycle) or the gas cooler (transcritical cycle or supercritical cycle) enters the crescent-shaped suction cavity of the expansion scroll from the expansion inlet, and drives the expansion disk to move around the expansion static disk in a plane under the action of the pressure difference. The expansion disk continuously moves to seal the cavity. As the expansion disk moves, the sealed cavity gradually moves toward the outside of the expansion scroll, and the volume increases, and the temperature and pressure decrease. When the cavity reaches the edge of the expansion exhaust port, the maximum expansion is formed, and the low-temperature and low-pressure gas is discharged from the expansion exhaust port, forming a complete expansion process. Expansion is a continuous process, and suction, expansion and exhaust are carried out simultaneously. The expansion disk driven by the pressure difference outputs shaft work to the outside.

[0074] The shaft work output by the expansion scroll is transmitted to the sun gear on the planetary gear through the transmission shaft, causing the sun gear to rotate. On this basis, the input work from the motor is transmitted to the planetary gear carrier on the planetary gear through the transmission shaft, causing the planetary gear to revolve around the sun gear. The direction of the planetary gear's revolution is opposite to the direction of the sun gear's rotation, thereby achieving the speed coupling of the two. The coupled speed is transmitted to the ring gear of the planetary gear and finally transmitted to the compression scroll through the transmission shaft.

[0075] In the steam refrigeration cycle, the medium-temperature, low-pressure refrigerant from the evaporator enters the crescent-shaped suction cavity of the compression scroll from the compression inlet, and drives the compression moving disk to move around the compression static disk in a plane under the action of the pressure difference. The compression moving disk continuously moves to seal the cavity. As the compression moving disk moves, the volume of the sealed cavity gradually moves toward the center of the compression scroll, and the temperature and pressure increase. When the cavity reaches the compression exhaust port at the center of the compression scroll, the maximum compression is formed, and the high-temperature and high-pressure gas is discharged from the compression exhaust port, forming a complete compression process. Compression is a continuous process, and suction, compression, and exhaust are carried out simultaneously. The power consumption of the compressor is provided by the shaft power output of the expansion and the input power of the motor.

[0076] The elastic spiral of the expansion and static disk can achieve the downward pressure / elasticity of the expansion and static disk spiral by adjusting the pressure in the expansion and static disk pressure chamber. When the pressure in the expansion and static disk pressure chamber is increased, the elastic expansion and static disk spiral gradually presses down, the initial crescent-shaped suction chamber volume of the expansion process gradually decreases, and the expansion ratio gradually increases; when the pressure in the expansion and static disk pressure chamber is reduced, the elastic expansion and static disk spiral gradually bounces up, the initial crescent-shaped suction chamber volume of the expansion process gradually increases, and the expansion ratio gradually decreases. Thus, continuous adjustment of the expansion ratio is achieved.

[0077] The elastic spiral of the compression stator can achieve the downward pressure / elasticity of the compression stator spiral by adjusting the pressure in the compression stator pressure chamber. When the pressure in the compression stator pressure chamber is increased, the elastic compression stator spiral gradually presses down, the volume of the crescent-shaped exhaust chamber in the compression process gradually decreases, and the compression ratio gradually increases; when the pressure in the compression stator pressure chamber is reduced, the elastic compression stator spiral gradually bounces up, the volume of the crescent-shaped exhaust chamber in the compression process gradually increases, and the compression ratio gradually decreases. Thus, the continuous adjustment of the compression ratio is achieved.

[0078] When the operating conditions of the vapor compression refrigeration cycle change, the expansion ratio / compression ratio of the refrigeration cycle can be adjusted by adjusting the pressure in the expansion plate pressure chamber / compression plate pressure chamber.

[0079] As a preferred embodiment, Figure 1 As shown, an expansion-compression integrated machine with a continuously adjustable working condition based on speed coupling includes an outer shell 7, and the upper half of the outer shell 7 is provided with an expansion stator end cover 29, an expansion stator vortex 22, an expansion moving disc 28, an expansion cross 21, a planetary gear, a compression cross 16, a compression moving disc 12, a compression stator vortex 10, and a compression stator end cover 9 in sequence along the axial direction. The upper half of the outer shell 7 is also provided with two air inlets (expansion air inlet 26 and compression air inlet 6), two exhaust ports (expansion exhaust port 1 and compression exhaust port 14) and two pressure regulating ports (expansion stator pressure regulating port 25 and compression stator pressure regulating port 13).

[0080] The planetary gear comprises a sun gear 23 , planetary gears 3 , a planetary gear carrier 2 , and a ring gear 4 .

[0081] The planetary gear carrier 2 includes a planetary gear carrier chassis 201, a connecting shaft 202 and a helical gear 203 on the outer edge of the planetary gear carrier; the connecting shaft 202 is arranged in the middle of the chassis 201, and the planetary gear carrier is connected to the planetary gear 3 through the connecting shaft 202;

[0082] The lower half of the outer shell 7 is provided with a motor stator 19 , a motor rotor 20 and a motor transmission gear 17 .

[0083] The motor stator 19 is fixed to the lower half of the outer shell 7, the motor rotor 20 is connected to the motor transmission gear 17 through the motor transmission shaft 18, and the motor transmission gear 17 and the bevel gear 203 on the outer edge of the planetary gear carrier are meshed with each other for transmission.

[0084] The expansion disk 28 is connected to the sun gear 23 via the transmission shaft 24 between the expansion disk and the sun gear, and a heat insulating material 5 is provided between the planetary gear carrier 2 and the expansion cross 21. The compression disk 12 is connected to the ring gear 4 via the transmission shaft 15 between the ring gear and the compression disk, and a heat insulating material 5 is provided between the ring gear 4 and the compression cross 16.

[0085] The ring gear 4 is located outside the planetary gears, the planetary gears 3 are located between the sun gear 23 and the ring gear 4 , and the planetary gears 3 are connected to the planetary gear carrier 2 via a connecting shaft 202 on the planetary gear carrier 2 .

[0086] In this embodiment, the expansion cross 21 and the compression cross 16 are both welded and fixed at corresponding positions of the outer shell 7 .

[0087] The expansion movable disc 28 and the expansion static disc vortex 22 are assembled with a phase difference of 180 degrees. The other side of the expansion movable disc 28 presses the expansion cross 21. The expansion movable disc 28 and the expansion static disc vortex 22 constitute an expansion chamber. The expansion static disc vortex 22 and the expansion static disc end cover 29 are assembled and engaged to form an expansion static disc pressure chamber 27. An expansion air inlet 26 and an expansion static disc pressure regulating port 25 are provided at the center of the expansion static disc end cover 29. An expansion exhaust port 1 is provided at the outermost edge of the expansion static disc end cover 29.

[0088] The compression movable plate 12 and the compression stator plate vortex 10 are assembled with a phase difference of 180 degrees. The other side of the compression movable plate 12 presses the compression cross 16. The compression movable plate 12 and the compression stator plate vortex 10 constitute a compression chamber. The compression stator plate vortex 10 is assembled with the compression stator plate end cover 9 to form a compression stator plate pressure chamber 11. A compression exhaust port 14 and a compression stator plate pressure regulating port 13 are provided at the center of the compression stator plate end cover 9. A compression air inlet 6 is provided at the outermost edge of the compression stator plate end cover 9.

[0089] like Figure 2a~Figure 2bAs shown, an expansion-compression integrated machine of the present invention with continuously adjustable working conditions based on speed coupling has an expansion ratio adjustment example as follows:

[0090] like Figure 2a As shown, when the internal pressure of the expansion plate pressure chamber 27 is increased to the maximum through the expansion plate pressure regulating port 25, the expansion plate vortex 22 is completely pressed down to fit the expansion plate 28. At this time, the bottom surface of the entire expansion plate vortex 22 is completely on the same plane. At this time, the expansion process starts to inhale from point A, the initial crescent-shaped inhalation volume is the smallest, and the expansion process expansion ratio is the largest (state 1). Figure 2b As shown, when the internal pressure of the expansion static disk pressure chamber 27 is reduced through the expansion static disk pressure regulating port 25, the expansion static disk vortex 22, under the action of the rebound force, starts to leave the bottom surface (BC section) from the center (state 2), at this time, the initial suction volume of the crescent becomes larger, and the expansion ratio of the expansion process decreases. As the internal pressure of the expansion static disk pressure chamber 27 continues to decrease, the expansion ratio can be continuously adjusted from large to small.

[0091] As shown in FIG3 , an expansion-compression integrated machine of the present invention with continuously adjustable working conditions based on speed coupling has a compression ratio adjustment example as follows:

[0092] like Figure 3a As shown in FIG. 1 , when the internal pressure of the compression stator plate pressure chamber 11 is increased to the maximum through the compression stator plate pressure regulating port 13, the compression stator plate vortex 10 is completely pressed down to fit the compression moving plate 12. At this time, the bottom surface of the entire compression stator plate vortex 10 is completely on the same plane, the crescent-shaped exhaust volume is the smallest, and the compression ratio of the compression process is the largest. Figure 3b As shown, when the internal pressure of the compression stator plate pressure chamber 11 is reduced through the compression stator plate pressure regulating port 13, the compression stator plate vortex 10, under the action of the rebound force, starts to partially leave the bottom surface from the center (BC section), at this time, the crescent-shaped exhaust volume becomes larger, and the compression ratio of the compression process decreases. As the internal pressure of the compression stator plate pressure chamber 11 continues to decrease, the compression ratio can be continuously adjusted from large to small.

[0093] like Figure 4a , Figure 4b , Figure 4c As shown, the present invention is an expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling, and its speed coupling process is as follows:

[0094] The shaft work generated from the expansion process is transmitted to the sun gear 23 via the transmission shaft 24 between the expansion disk and the sun gear, causing the sun gear 23 to rotate. The input work from the motor is transmitted to the planetary gear carrier 2 via the motor transmission gear 17. Driven by the planetary gear carrier 2, the planetary gear 3 revolves around the sun gear, and the rotation direction of the sun gear 23 is opposite to the direction of the planetary gear 3 revolving around the sun gear, thereby coupling the speed to the ring gear 4. The rotation of the ring gear 4 is then transmitted to the compression disk 12 via the transmission shaft 15 between the ring gear and the compression disk, thereby completing the compression process. In the process of speed coupling transmission, part of the work consumed in the compression process comes from the shaft work recovered in the expansion process, and part is supplemented by the input work of the motor.

[0095] As another embodiment, the expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling is made of metal materials such as stainless steel or aluminum alloy as a whole, wherein the insulation material 5 is insulation materials such as asbestos, rock wool, aerogel or vacuum board, and the pressure regulation in the expansion static plate pressure chamber / compression static plate pressure chamber adopts pressure regulation methods such as liquid pressure or gas pressure.

[0096] Although the embodiments of the present invention have been described, relevant technical personnel in the field can understand that various changes, modifications, substitutions and deformations made to these embodiments without departing from the principles and circumstances of the purpose of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. An expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling, characterized in that: The outer shell comprises an outer shell, which is divided into an upper and lower part. An expansion scroll, a planetary gear and a compression scroll are arranged in sequence along the axial direction in the upper part; a driving motor connected to the planetary gear is arranged in the lower part, and the expansion scroll and the compression scroll are connected to the planetary gear; an expansion and compression air inlet, an expansion and compression air outlet and a pressure regulating port are arranged on the outer shell; The expansion scroll disk includes an expansion static disk, an expansion dynamic disk and an expansion cross; The expansion moving disc and the expansion static disc are assembled with a phase difference of 180 degrees, and the bottom surface of the expansion moving disc presses the expansion cross tightly; The expansion stator includes an expansion stator end cover and an expansion stator vortex; The expansion and stator disc end cover is connected to the upper part of the outer shell through fixing screws, and the expansion and stator disc end cover is provided with an expansion and stator disc pressure chamber of a spiral structure, and its structural dimensions match the expansion and stator disc vortex; The expansion and stator disk vortex is an elastic spiral structure, which is gradually pressed down / bounced up under the pressure of the expansion and stator disk pressure chamber, and matches the expansion and stator disk pressure chamber on the expansion and stator disk end cover, and the expansion and stator disk end cover is partially embedded in the expansion and stator disk pressure chamber; The compression scroll plate includes a compression static plate, a compression dynamic plate and a compression cross; The compression moving plate and the compression static plate are assembled with a phase difference of 180 degrees, and the bottom surface of the compression moving plate presses the compression cross tightly; The compression stator includes a compression stator end cover and a compression stator scroll; The compression stator end cover is connected to the upper part of the outer shell by fixing screws, and a compression stator pressure chamber with a spiral structure is provided on the compression stator end cover, and its structural dimensions match the compression stator vortex; The compression stator vortex is an elastic spiral structure, which is gradually pressed down / bounced up under the pressure of the compression stator pressure chamber, and matches the compression stator pressure chamber on the compression stator end cover, and the compression stator end cover is partially embedded in the compression stator pressure chamber; The planetary gear includes a sun gear, planet gears, a planet gear carrier and a ring gear; The sun gear and the ring gear are located on both sides of the planetary gear; the sun gear is connected to the expansion disk of the expansion scroll through a transmission shaft; the ring gear is connected to the compression disk of the compression scroll through a transmission shaft; The planetary gear is located between the sun gear and the ring gear, and the planetary gear is connected to the planetary gear carrier through a connecting shaft on the planetary gear carrier; A helical gear is provided on the outer edge of the planetary gear carrier; the motor transmission gear of the drive motor meshes with the helical gear; An air inlet connected to the expansion air inlet on the outer shell is provided at the center of the expansion stator. An exhaust port connected to the expansion exhaust port on the outer shell is provided at the outermost edge of the expansion stator; The expansion and static disk is provided with a pressure regulating port which is connected with the pressure regulating port of the expansion and static disk on the outer shell; An air inlet connected to the compression air inlet on the outer shell is provided at the center of the compression stator disk; An exhaust port connected to the compression exhaust port on the outer shell is provided at the outermost edge of the compression stator; The compression static disk is also provided with a pressure regulating port which is connected with the compression static disk pressure regulating port on the outer shell.

2. The expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling according to claim 1 is characterized in that: Heat insulating materials are provided between the expansion scroll and the planetary gear, and between the planetary gear and the compression scroll.

3. The expansion-compression integrated machine with continuously adjustable working conditions based on speed coupling according to claim 1 is characterized in that: The motor includes a motor stator, a motor rotor and a motor transmission gear; The motor stator is fixed to the lower half of the outer shell; The motor rotor is connected to the motor transmission gear through the motor transmission shaft; The motor drive gear meshes with the helical gear on the outer edge of the planetary gear carrier.

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