Self-driven double-disc energy recovery device

Abstract

The present application belongs to the technical field of liquid overpressure energy recycling in process industry, and discloses a self-driven double-rotating disc type energy recycling device, which comprises a first cylinder and a second cylinder which are symmetrical and connected in the same structure, and the internal space of the first cylinder and the second cylinder is provided with a special-shaped shaft, a stator, a first rotating disc, a second rotating disc, a first sleeve and a second sleeve which are coaxially arranged; the first rotating disc and the first sleeve are located at one end of the stator, and the second rotating disc and the second sleeve are located at the other end of the stator; the first sleeve and the second sleeve are fixedly connected with the stator through bolts, and the first rotating disc and the second rotating disc are coaxially and staggeredly connected at both ends of the stator through the special-shaped shaft. Through the technical measures of circumferential inflow impact driving double-rotating disc coaxial rotation movement and pressure exchange of high and low pressure fluids in the stator channel, the present application realizes independent operation of rotary switching and pressure exchange, better dynamic balance performance and other effects, which is beneficial to improve the operation stability and efficiency of the device, and is easy to realize engineering amplification of the treatment capacity.

Description

A self-driven dual-rotor energy recovery device Technical Field

[0001] This invention belongs to the field of liquid residual pressure energy recovery and utilization technology in process industry. Specifically, it relates to an energy recovery device for pressure energy exchange between pressurized liquid and pressurized liquid. Background Technology

[0002] Reverse osmosis desalination, as an important high-tech method for producing freshwater from seawater, has been widely adopted in coastal areas worldwide. This technology is a pressure-driven membrane separation process. In the process, the feed seawater is first pressurized to 5.5-8.0 MPa by a high-pressure pump, and then enters the reverse osmosis membrane module for salt / water separation. The desalinated water produced by the reverse osmosis membrane accounts for approximately 45% of the total feed water, while about 55% of the seawater is retained and concentrated by the reverse osmosis membrane, with a pressure still exceeding 5.0 MPa. Directly discharging this high-pressure brine would result in a significant waste of system energy. Therefore, employing energy recovery devices to efficiently recover and utilize the pressure energy in the high-pressure brine has become an important way to achieve energy conservation, emission reduction, and green, low-carbon development in reverse osmosis desalination systems.

[0003] Energy recovery devices, as a key component of reverse osmosis seawater desalination technology, are mainly classified into two categories based on their working principle: centrifugal and positive displacement. Centrifugal devices, as an earlier product, have an energy recovery efficiency of 50-80%, while positive displacement energy recovery devices only require a one-step "pressure energy-pressure energy" conversion, achieving an energy recovery efficiency of over 95%, and have become the mainstream product for research, development, and market application both domestically and internationally. Rotary energy recovery devices are a typical representative of positive displacement energy recovery devices, possessing advantages such as compact structure, small footprint, and simple operation.

[0004] Rotary energy recovery devices typically use a single rotor as the rotating component, with the PX series developed by ERI Corporation in the United States being a representative example. In publicly available hydraulically driven rotor energy recovery devices, the hydraulic system not only drives the rotor component to rotate, but also simultaneously drives the fluid undergoing pressure exchange within the rotor channels. This coupling of rotational switching and pressure exchange processes leads to high hydraulic drive energy consumption. Furthermore, the inclined flow channel structure of the end caps paired with the rotor results in predominantly axial impact flow, which negatively affects the dynamic balance performance of the rotating components. Limited by rotor speed and salinity mixing within the rotor channels, the device can only be adjusted within a narrow operating load range to ensure high operating efficiency. Scaling up the system would increase rotor rotation instability and the complexity of the hydraulic drive, and currently, the single-unit processing capacity of rotor energy recovery devices remains relatively low. Summary of the Invention

[0005] This invention aims to solve the technical problem of insufficient single-unit processing capacity of current rotor-type energy recovery devices. It provides a self-driven dual-rotor energy recovery device, which achieves independent operation of the rotary switching unit and pressure exchange unit through circumferential inflow impact driving the coaxial rotation of the two rotors, and pressure exchange of high and low pressure fluids in the stator channel. This results in better dynamic balance performance of the rotating components, which is beneficial to improving the stability and efficiency of the device in the system, and at the same time, it is easy to realize the engineering scale-up of the device's processing capacity.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0007] The present invention provides a self-driven dual-rotor energy recovery device, comprising a first cylinder and a second cylinder with identical structures and symmetrically arranged, wherein the first cylinder and the second cylinder are joined at their first ends and fixed by a flange, and the connection is sealed.

[0008] The internal spaces of the first and second cylindrical bodies are equipped with a coaxially arranged irregularly shaped shaft, a stator, a first turntable, a second turntable, a first sleeve, and a second sleeve. The stator is located in the middle of the first and second cylindrical bodies, the first turntable and the first sleeve are located at one end of the stator, and the second turntable and the second sleeve are located at the other end of the stator. The first sleeve and the second sleeve are respectively installed on the outer periphery of the first turntable and the second turntable. The first sleeve and the second sleeve are fixedly connected to the stator by bolts, and the first turntable and the second turntable are coaxially and offsetly connected to both ends of the stator by the irregularly shaped shaft.

[0009] The first cylinder has a pressurized liquid outlet pipe coaxially disposed at its second end and a low-pressure liquid inlet pipe radially disposed at its second end; the pressurized liquid outlet pipe includes a first partition pipe section extending into the interior of the first cylinder; the interior space of the first partition pipe section is a pressurized liquid collecting chamber, which communicates with the inner cavity of the pressurized liquid outlet pipe; the annular space between the first partition pipe section and the first cylinder is a low-pressure liquid distribution chamber, which communicates with the inner cavity of the low-pressure liquid inlet pipe.

[0010] The second cylinder has a pressure relief liquid outlet pipe coaxially disposed at its second end and a high-pressure liquid inlet pipe radially disposed at its second end; the pressure relief liquid outlet pipe includes a second partition pipe section extending into the interior of the second cylinder; the interior space of the second partition pipe section is a pressure relief liquid collecting chamber, which communicates with the inner cavity of the pressure relief liquid outlet pipe; the annular space between the second partition pipe section and the second cylinder is a high-pressure liquid distribution chamber, which communicates with the inner cavity of the high-pressure liquid inlet pipe.

[0011] The two end sections of the stator are expanded outward relative to the middle section, and the outer diameter of the two end sections matches the inner diameter of the first cylinder and the second cylinder; the expanded portions of the two end sections of the stator are fixedly connected to the first sleeve and the second sleeve respectively by bolts; the center of the stator is provided with an axially penetrating central hole for the irregular shaft to pass through; multiple axially penetrating stator channels are provided around the outer periphery of the central hole, and the multiple stator channels are evenly distributed in a ring;

[0012] The irregular shaft includes a central main body and two end studs: a first stud and a second stud. The radial cross-section of the main body is polygonal, and the first stud and the second stud are cylinders with external threads.

[0013] The first turntable is provided with two low-pressure liquid chambers and two pressurized liquid chambers evenly distributed in a ring, with the two low-pressure liquid chambers and the two pressurized liquid chambers arranged opposite each other; both the low-pressure liquid chambers and the pressurized liquid chambers are axially connected to the first turntable; the circumferential side of the first turntable is provided with two first turntable inlet windows opposite each other, and the two first turntable inlet windows are respectively connected to the two low-pressure liquid chambers; the first turntable is coaxially provided with a first turntable central cavity, which is open towards the outer end face of the first turntable and partially closed towards the inner end face of the first turntable due to the presence of a first turntable limiting groove and a first turntable bolt hole; the first turntable central cavity is connected to the two pressurized liquid chambers through the first turntable flow windows; the first turntable limiting groove and the first turntable bolt hole are coaxially provided at the center of the inner end face of the first turntable, the first turntable bolt hole is used to connect and cooperate with the first stud part of the irregular shaft, and the first turntable limiting groove is used to cooperate with the main body part of the irregular shaft;

[0014] The second turntable is provided with two high-pressure liquid chambers and two pressure-relief liquid chambers evenly distributed in a ring, with the two high-pressure liquid chambers and the two pressure-relief liquid chambers arranged opposite each other; both the high-pressure liquid chambers and the pressure-relief liquid chambers are axially connected to the second turntable; two second turntable inlet windows are provided opposite each other on the circumferential side of the second turntable, and the two second turntable inlet windows are respectively connected to the two high-pressure liquid chambers; the second turntable has a coaxially arranged second turntable central cavity, which is open towards the outer end face of the second turntable and partially closed towards the inner end face of the second turntable due to the presence of the second turntable limiting groove and the second turntable bolt hole; the second turntable central cavity is connected to the two pressure-relief liquid chambers through the second turntable flow window; the second turntable limiting groove and the second turntable bolt hole are coaxially arranged at the center of the inner end face of the second turntable, the second turntable bolt hole is used to connect and cooperate with the second stud part of the irregular shaft, and the second turntable limiting groove is used to cooperate with the main body part of the irregular shaft;

[0015] The irregular shaft is coaxially misaligned with the first turntable and the second turntable, causing the inlet window of the first turntable to be rotated and misaligned with the inlet window of the second turntable by 90°.

[0016] The first sleeve and the second sleeve have the same structure and are symmetrically arranged, and the outer diameter of the first sleeve and the second sleeve matches the inner diameter of the first cylinder and the second cylinder. The inner cavity of the first sleeve and the second sleeve is composed of a turntable mounting cavity, a sleeve flow cavity, and a pipe limiting cavity. The turntable mounting cavity, the sleeve flow cavity, and the pipe limiting cavity are arranged sequentially from the end near the stator to the end away from the stator. Spiral guide vanes are evenly distributed in a ring in the cylinder wall of the first sleeve and the second sleeve, and a spiral flow guiding cavity is formed between adjacent spiral guide vanes.

[0017] The first sleeve's rotary mounting cavity is used to mount the first rotary disk, and a gap liquid film can be formed between the end face and the circumferential surface of the first rotary disk and the rotary mounting cavity; the first sleeve's connecting pipe limiting cavity cooperates with the end of the first dividing pipe section of the pressurized liquid outlet connecting pipe and is sealed, while realizing the communication between the sleeve's flow cavity and the pressurized liquid collection cavity; furthermore, the first sleeve's flow cavity is connected to and communicates with the central cavity of the first rotary disk; one end of the first sleeve's spiral guiding cavity is connected to the low-pressure liquid distribution cavity, and the other end is connected to the first sleeve's rotary mounting cavity;

[0018] The second sleeve's rotary mounting cavity is used to mount the second rotary disk, and a gap liquid film can be formed between the end face and the circumferential surface of the second rotary disk and the rotary mounting cavity; the second sleeve's connecting pipe limiting cavity cooperates with the end of the second dividing pipe section of the pressure relief liquid outlet connecting pipe and is sealed, while realizing the communication between the sleeve's flow cavity and the pressure relief liquid collection cavity; furthermore, the second sleeve's sleeve flow cavity is connected to and communicates with the center cavity of the second rotary disk; one end of the second sleeve's spiral guiding cavity is connected to the high-pressure liquid distribution cavity, and the other end is connected to the second sleeve's rotary mounting cavity.

[0019] Furthermore, the pressurized liquid outlet pipe and the low-pressure liquid inlet pipe are integrally formed with the first cylinder body, and the pressure relief liquid outlet pipe and the high-pressure liquid inlet pipe are integrally formed with the second cylinder body.

[0020] Furthermore, the outwardly expanded portions at both ends of the stator are provided with axially penetrating stator bolt holes, which are evenly distributed in a ring on the end face of the stator; the first sleeve and the second sleeve have evenly distributed threaded holes in a ring on their end faces facing the stator; the stator bolt holes and the threaded holes are used to achieve a fixed connection between the stator and the first sleeve and the second sleeve, respectively.

[0021] Furthermore, the outwardly expanded portion at one end of the stator is also provided with a sealing ring mounting groove, which is used to install a sealing ring to achieve a seal between the stator and the first cylinder or the second cylinder.

[0022] Furthermore, the stator channels are distributed in a single ring or in multiple concentric circles.

[0023] Furthermore, instead of the pressurizing liquid chamber being axially continuous along the first turntable, the pressurizing liquid chamber is now open towards the inner end face of the first turntable, and partially closed towards the outer end face of the first turntable due to the provision of the first turntable adjustment hole.

[0024] Furthermore, the inner wall surfaces of the low-pressure liquid chamber and the pressurizing liquid chamber are smooth arc-shaped curved surfaces, and the inner wall surfaces of the high-pressure liquid chamber and the depressurizing liquid chamber are smooth arc-shaped curved surfaces.

[0025] Furthermore, the inner diameter of the turntable mounting cavity is larger than that of the pipe limiting cavity, and the inner diameter of the pipe limiting cavity is larger than that of the sleeve flow cavity.

[0026] Furthermore, the spiral guide cavity sequentially includes a uniform distribution section and an acceleration section along the fluid flow direction; the uniform distribution section communicates with the low-pressure liquid uniform distribution cavity at the end face of the first sleeve and with the high-pressure liquid uniform distribution cavity at the end face of the second sleeve, and the uniform distribution section is used to further uniformly distribute the fluid from the low-pressure liquid uniform distribution cavity or the high-pressure liquid uniform distribution cavity; the acceleration section communicates with the turntable mounting cavity at the inner cavity surfaces of the first sleeve and the second sleeve, and the acceleration section is used to accelerate the flow and transform the fluid into a circumferential inflow at its end.

[0027] Furthermore, the acceleration section has a greater degree of spirality and a smaller cross-sectional width compared to the uniformly distributed section.

[0028] The aforementioned self-driven dual-rotor energy recovery device includes a simultaneous pressurization and depressurization process:

[0029] The pressurization process is as follows: high-pressure liquid enters the high-pressure liquid distribution chamber through the high-pressure liquid inlet pipe, then enters each spiral guide chamber of the second sleeve, and then enters and impacts the high-pressure liquid chamber through the second turntable inlet window, driving the second turntable to rotate continuously; then it enters the part of the stator channel that is connected to the high-pressure liquid chamber, pressurizing the low-pressure liquid in these stator channels; the pressurized liquid then passes through the pressurization liquid chamber of the first turntable and the first turntable flow window from this part of the stator channel into the center cavity of the first turntable, then through the sleeve flow cavity of the first sleeve into the pressurization liquid collection cavity, and finally is discharged through the pressurization liquid outlet pipe.

[0030] The pressure relief process is as follows: low-pressure liquid enters the low-pressure liquid distribution chamber through the low-pressure liquid inlet pipe, then enters each spiral guide chamber of the first sleeve, and then enters and impacts the low-pressure liquid chamber through the first turntable inlet window of the first turntable, driving the first turntable to rotate continuously; then it enters the part of the stator channel that is connected to the low-pressure liquid chamber, and the high-pressure liquid in these stator channels is depressurized. The depressurized liquid then passes through the pressure relief liquid chamber of the second turntable and the second turntable flow window in sequence from this part of the stator channel into the center cavity of the second turntable, and then enters the pressure relief liquid collection chamber through the sleeve flow chamber of the second sleeve, and finally is discharged through the pressure relief liquid outlet pipe.

[0031] During the pressurization and depressurization processes, the stator channels that are not covered by the liquid cavities during the pressurization and depressurization processes are either under high-pressure sealing or low-pressure sealing.

[0032] As the first and second turntables rotate coaxially for one revolution, each of the stator channels sequentially undergoes a pressurization process, a high-pressure sealing process, a depressurization process, and a low-pressure sealing process, thus achieving a continuous pressure exchange process between high and low pressure fluids.

[0033] The beneficial effects of this invention are:

[0034] (i) The self-driven dual-rotor energy recovery device of the present invention completes the switching of the pressure increase and decrease process through the coaxial rotation of the first and second rotors, and the pressure exchange of high and low pressure fluids in the stator channel. It realizes the independent operation of the rotation switching unit and the pressure exchange unit, which is conducive to reducing the energy consumption of hydraulic drive, improving the energy recovery efficiency of the device, and also makes it easy to realize the engineering scale-up of the device's processing capacity.

[0035] (II) The self-driven dual-disc energy recovery device of the present invention, through the unique spiral guide vane structure on the first and second sleeves, can achieve the uniform distribution and acceleration of the incoming fluid and the circumferential impact on the dual discs, thereby driving the first and second discs to rotate coaxially. It has the characteristics of large driving torque and high impact efficiency. This circumferential drive is more conducive to improving the dynamic balance performance of the rotating parts than the axial drive. In addition, the first and second discs preferably have a four-zone symmetrical liquid cavity structure, which makes the driving force on the dual discs more stable, improves the dynamic balance performance of the disc rotation, and enhances the operational stability of the device.

[0036] (III) The self-driven dual-rotary energy recovery device of the present invention has an additional first rotary table adjustment hole structure on the first rotary table compared with the second rotary table. This structure can adjust and balance the uneven axial force caused by the pressure difference between high and low pressure fluids on the dual rotary tables of the device. This helps to reduce the friction and wear of the corresponding friction pairs of the first and second rotary tables and increase the maintenance-free period of the device.

[0037] (iv) The self-driven dual-rotor energy recovery device of the present invention has fewer core components and a simple overall structure; the first cylinder and the second cylinder of the device have the same structure and are fixedly connected only by the connecting flange at the end, making subsequent disassembly and maintenance more convenient and quick. Attached Figure Description

[0038] Figure 1 is a schematic diagram of the overall structure of the self-driven dual-rotary energy recovery device according to an embodiment of the present invention.

[0039] Figure 2 is a three-dimensional structural diagram of the stator in an embodiment of the present invention;

[0040] Figure 3 is an end face view of the stator in an embodiment of the present invention;

[0041] Figure 4 is a cross-sectional view of the stator in an embodiment of the present invention;

[0042] Figure 5 shows (a) an end view and (b) a front view of the irregular shaft in an embodiment of the present invention;

[0043] Figure 6 is a three-dimensional structural diagram of the first turntable in an embodiment of the present invention;

[0044] Figure 7 is an end view of the first turntable in an embodiment of the present invention;

[0045] Figure 8 is a first cross-sectional view of the first turntable in an embodiment of the present invention;

[0046] Figure 9 is a second cross-sectional view of the first turntable in an embodiment of the present invention;

[0047] Figure 10 is a three-dimensional structural diagram of the second turntable in an embodiment of the present invention;

[0048] Figure 11 is an end view of the second turntable in an embodiment of the present invention;

[0049] Figure 12 is a first cross-sectional view of the second turntable in an embodiment of the present invention;

[0050] Figure 13 is a second cross-sectional view of the second turntable in an embodiment of the present invention;

[0051] Figure 14 is a schematic diagram of the coaxial misaligned connection of the first turntable and the second turntable in an embodiment of the present invention;

[0052] Figure 15 is a first-view perspective three-dimensional structural diagram of the first sleeve in an embodiment of the present invention;

[0053] Figure 16 is a schematic diagram of the first sleeve from a second perspective in an embodiment of the present invention.

[0054] Figure 17 is a schematic diagram of the spiral guide vane structure of the first sleeve in an embodiment of the present invention;

[0055] Figure 18 is a cross-sectional view of the first sleeve in an embodiment of the present invention.

[0056] In the diagram: 1. Pressurized liquid outlet pipe;

[0057] 2. Pressurized liquid collection chamber;

[0058] 3. Low-pressure liquid distribution chamber;

[0059] 4. First sleeve; 4-1. Spiral guide vane; 4-2. Spiral guide cavity; 4-3. Sleeve threaded hole; 4-4. Turntable mounting cavity; 4-5. Sleeve flow cavity; 4-6. Connector limiting cavity;

[0060] 5. First turntable; 5-1. First turntable inlet window; 5-2. Low-pressure liquid chamber; 5-3. Pressurized liquid chamber; 5-4. First turntable adjustment hole; 5-5. First turntable flow window; 5-6. First turntable limiting groove; 5-7. First turntable bolt hole; 5-8. First turntable center cavity.

[0061] 6. Stator; 6-1. Stator channel; 6-2. Center hole; 6-3. Stator bolt hole; 6-4. Sealing ring mounting groove;

[0062] 7. Second turntable; 7-1. Second turntable inlet window; 7-2. High-pressure liquid chamber; 7-3. Pressure relief liquid chamber; 7-4. Second turntable flow window; 7-5. Second turntable limiting groove; 7-6. Second turntable bolt hole; 7-7. Second turntable center cavity.

[0063] 8. Second sleeve,

[0064] 9. High-pressure liquid distribution chamber;

[0065] 10. Pressure-relief fluid collection chamber;

[0066] 11. Pressure relief liquid outlet pipe;

[0067] 12. High-pressure liquid inlet pipe;

[0068] 13. Irregular shaft; 13-1. First stud portion; 13-2. Main body portion; 13-3. Second stud portion;

[0069] 14. Second cylinder;

[0070] 15. First cylinder;

[0071] 16. Low-pressure liquid inlet pipe. Detailed Implementation

[0072] As shown in Figure 1, this embodiment provides a self-driven dual-rotor energy recovery device, which mainly includes a first cylinder 15, a second cylinder 14, a pressurized liquid outlet pipe 1, a low-pressure liquid inlet pipe 16, a depressurized liquid outlet pipe 11, a high-pressure liquid inlet pipe 12, a shaped shaft 13, a stator 6, a first rotary table 5, a second rotary table 7, a first sleeve 4, and a second sleeve 8.

[0073] The first cylinder 15 and the second cylinder 14 have identical structures and are symmetrically arranged, each having a first end and a second end. The first cylinder 15 and the second cylinder 14 are joined together at their first ends and fixed to each other by a connecting flange, with a seal at the connection point. In this way, the first cylinder 15 and the second cylinder 14 together constitute the outer cylinder of the device, ensuring the safe and orderly exchange of high and low pressure fluids within the device.

[0074] A pressurized liquid outlet pipe 1 is coaxially disposed at the second end of the first cylinder 15, and a low-pressure liquid inlet pipe 16 is radially disposed at the second end. Generally, the pressurized liquid outlet pipe 1 and the low-pressure liquid inlet pipe 16 are integrally formed with the first cylinder 15. The pressurized liquid outlet pipe 1 includes a first dividing pipe section extending a certain length into the interior of the first cylinder 15. The interior space of the first dividing pipe section is a pressurized liquid collecting chamber 2, and the annular space between the first dividing pipe section and the first cylinder 15 is a low-pressure liquid distribution chamber 3. The axis of the low-pressure liquid inlet pipe 16 is arranged radially along the first cylinder 15, and its inner cavity is connected to the low-pressure liquid distribution chamber 3.

[0075] The second cylinder 14 has a pressure relief liquid outlet pipe 11 coaxially disposed at its second end, and a high-pressure liquid inlet pipe 12 radially disposed at its second end. Generally, the pressure relief liquid outlet pipe 11 and the high-pressure liquid inlet pipe 12 are integrally formed with the second cylinder 14. The pressure relief liquid outlet pipe 11 includes a second partition pipe section extending a certain length into the interior of the second cylinder 14; the interior space of the second partition pipe section is a pressure relief liquid collecting chamber 10, and the annular space between the second partition pipe section and the second cylinder 14 is a high-pressure liquid distribution chamber 9. The axis of the high-pressure liquid inlet pipe 12 is arranged radially along the second cylinder 14, and its inner cavity is connected to the high-pressure liquid distribution chamber 9.

[0076] The irregular shaft 13, stator 6, first turntable 5, second turntable 7, first sleeve 4, and second sleeve 8 are coaxially assembled inside the first cylinder 15 and the second cylinder 14, and located in the cavity between the first and second partition tube sections. The stator 6 is located in the middle of the first cylinder 15 and the second cylinder 14. The first sleeve 4 is fitted outside the first turntable 5, and both are located at one end of the stator 6; the second sleeve 8 is fitted outside the second turntable 7, and both are located at the other end of the stator 6. The first sleeve 4 and the second sleeve 8 are fixedly connected to the stator 6 by bolts, and the first and second turntables are fixed to the two ends of the stator 6 by the irregular shaft 13 in a staggered manner.

[0077] As shown in Figures 2-4, the stator 6 includes a stator channel 6-1, a center hole 6-2, a stator bolt hole 6-3, and a sealing ring mounting groove 6-4.

[0078] The main body of stator 6 is a stepped columnar structure, with its two end sections expanding outward relative to the middle section, and the outer diameter of the two end sections matching the inner diameter of the first cylinder 15 and the second cylinder 14.

[0079] The extended portions at both ends of the stator 6 are used to provide axially penetrating stator bolt holes 6-3. These bolt holes 6-3 are evenly distributed in a ring on the end face of the stator 6, used to achieve fixed connections between the two ends of the stator 6 and the first sleeve 4 and the second sleeve 8, respectively. Preferably, the extended portion at one end of the stator 6 is also provided with a sealing ring mounting groove 6-4, used to install a sealing ring to achieve a seal between the stator 6 and the first cylinder 15 or the second cylinder 14, thereby preventing crossflow between high and low pressure fluids.

[0080] The central hole 6-2 extends axially along the central axis of the stator 6, allowing the irregular shaft 13 to pass through; therefore, the inner diameter of the central hole 6-2 is larger than the maximum radial dimension of the irregular shaft 13. Multiple axially extending stator channels 6-1 are evenly distributed in a ring around the outer periphery of the central hole 6-2. The stator channels 6-1 can be distributed in a single ring or in multiple concentric circles. The radial shape of the stator channels 6-1 can be circular, elliptical, fan-shaped, or other shapes. While ensuring the strength of the stiffeners between the stator channels 6-1, a higher opening ratio is preferable, as this helps reduce fluid flow resistance loss and increases the processing capacity of the energy recovery device.

[0081] As shown in Figure 5, the irregular shaft 13 includes a main body 13-2 and a first stud portion 13-1 and a second stud portion 13-3 at both ends of the main body 13-2. The main body 13-2 has a radial cross-section with a square or other polygonal structure, and the first stud portion 13-1 and the second stud portion 13-3 are cylindrical structures with external threads. The irregular shaft 13 is used to offset and fix the first turntable 5 and the second turntable 7 to both ends of the stator 6, making the first turntable 5 and the second turntable 7 a moving unit.

[0082] As shown in Figures 6-9, the main body of the first turntable 5 is a cylindrical structure, and it is provided with a first turntable inlet window 5-1, a low-pressure liquid chamber 5-2, a pressurizing liquid chamber 5-3, a first turntable adjustment hole 5-4, a first turntable flow window 5-5, a first turntable limiting groove 5-6, a first turntable bolt hole 5-7, and a first turntable center cavity 5-8.

[0083] In this invention, the end of the first turntable 5 facing the stator 6 is called the inner end face, and the end facing away from the stator 6 is called the outer end face.

[0084] Two low-pressure liquid chambers 5-2 and two pressurized liquid chambers 5-3 are evenly distributed in a ring on the first turntable 5, with the two low-pressure liquid chambers 5-2 and the two pressurized liquid chambers 5-3 facing each other. The low-pressure liquid chambers 5-2 extend axially through the first turntable 5. The pressurized liquid chambers 5-3 are open on their inner end faces facing the first turntable 5, but partially closed on their outer end faces due to the presence of a first turntable adjustment hole 5-4. The first turntable adjustment hole 5-4 helps to adjust the axial force imbalance caused by the pressure difference between the high and low pressure fluids on the two turntables, thus mitigating frictional wear on the corresponding friction pairs of the first turntable 5 and the second turntable 7.

[0085] Two first turntable inlet windows 5-1 are arranged opposite each other on the circumferential side of the first turntable 5 and are respectively connected to two low-pressure liquid chambers 5-2. Low-pressure fluid flows into the low-pressure liquid chambers 5-2 from the first turntable inlet windows 5-1, and then flows into the part of the stator channel 6-1 that is connected to the low-pressure liquid chambers 5-2, where the pressure relief process takes place.

[0086] The first turntable central cavity 5-8 is coaxially disposed at the center of the first turntable 5. The first turntable central cavity 5-8 is open towards the outer end face of the first turntable 5, and partially closed towards the inner end face of the first turntable 5 due to the presence of the first turntable limiting groove 5-6 and the first turntable bolt hole 5-7. The first turntable central cavity 5-8 has the same diameter as the sleeve flow cavity 4-5 of the first sleeve 4, and the two are connected and connected after assembly. The first turntable central cavity 5-8 is connected to the two pressurizing liquid chambers 5-3 through the first turntable flow window 5-5. The pressurizing fluid flows into the pressurizing liquid chamber 5-3 from the part of the stator channel 6-1 that is connected to the pressurizing liquid chamber 5-3, and then flows into the first turntable central cavity 5-8 through the first turntable flow window 5-5. This part is the pressurization process.

[0087] Preferably, the inner wall surfaces of the low-pressure liquid chamber 5-2 and the pressurized liquid chamber 5-3 are smooth arc-shaped surfaces, which are beneficial to the impact drive of the incoming fluid and can also effectively reduce fluid flow resistance loss.

[0088] The first turntable limiting groove 5-6 and the first turntable bolt hole 5-7 are coaxially disposed at the center of the inner end face of the first turntable 5, wherein the first turntable bolt hole 5-7 directly communicates with the central cavity 5-8 of the first turntable. The first turntable bolt hole 5-7 is used to connect and cooperate with the first stud portion 13-1 of the irregular shaft 13, and the first turntable 5 and the irregular shaft 13 are fixedly connected by a nut. The first turntable limiting groove 5-6 is used to cooperate with the main body portion 13-2 of the irregular shaft 13 to ensure that the first turntable 5 and the second turntable 7 are rotated out of alignment by 90°.

[0089] As shown in Figures 10-13, the main body of the second turntable 7 is a cylindrical structure, and it is provided with a second turntable inlet window 7-1, a high-pressure liquid chamber 7-2, a pressure relief liquid chamber 7-3, a second turntable flow window 7-4, a second turntable limiting groove 7-5, a second turntable bolt hole 7-6, and a second turntable central cavity 7-7.

[0090] In this invention, the end of the second turntable 7 facing the stator 6 is called the inner end face, and the end facing away from the stator 6 is called the outer end face.

[0091] Two high-pressure liquid chambers 7-2 and two pressure-relief liquid chambers 7-3 are evenly distributed in a ring on the second turntable 7, with the two high-pressure liquid chambers 7-2 facing each other and the two pressure-relief liquid chambers 7-3 facing each other. Both the high-pressure liquid chambers 7-2 and the pressure-relief liquid chambers 7-3 are axially connected along the second turntable 7.

[0092] Two second turntable inlet windows 7-1 are positioned opposite each other on the circumferential side of the second turntable 7 and are respectively connected to two high-pressure liquid chambers 7-2. High-pressure fluid flows from the second turntable inlet windows 7-1 into the high-pressure liquid chambers 7-2, and then into the stator channel 6-1 of the stator 6 that is connected to the high-pressure liquid chambers 7-2, where the pressurization process takes place.

[0093] The second turntable central cavity 7-7 is coaxially located at the center of the second turntable 7. The second turntable central cavity 7-7 is open towards the outer end face of the second turntable 7, while its inner end face is partially closed due to the presence of the second turntable limiting groove 7-5 and the second turntable bolt holes 7-6. The second turntable central cavity 7-7 has the same diameter as the sleeve flow cavity of the second sleeve 4, allowing for docking and communication after assembly. The second turntable central cavity 7-7 is connected to the two pressure relief fluid chambers 7-3 via second turntable flow windows 7-4. Pressure relief fluid flows into the pressure relief fluid chamber 7-3 from the stator channel 6-1 connected to the pressure relief fluid chamber 7-3, and then flows into the second turntable central cavity 7-7 through the second turntable flow windows 7-4; this part constitutes the pressure relief process.

[0094] Preferably, the inner wall surfaces of the high-pressure liquid chamber 7-2 and the pressure relief liquid chamber 7-3 are smooth arc-shaped surfaces, which are beneficial to the impact drive of the incoming fluid and can also effectively reduce fluid flow resistance loss.

[0095] The second turntable limiting groove 7-5 and the second turntable bolt hole 7-6 are coaxially disposed at the center of the inner end face of the second turntable 7, wherein the second turntable bolt hole 7-6 directly communicates with the central cavity 7-7 of the second turntable. The second turntable bolt hole 7-6 is used to connect and cooperate with the second stud portion 13-3 of the irregular shaft 13, and the second turntable 7 and the irregular shaft 13 are fixedly connected by a nut. The second turntable limiting groove 7-5 is used to cooperate with the main body portion 13-2 of the irregular shaft 13 to ensure that the first turntable 5 and the second turntable 7 are rotated out of alignment by 90°.

[0096] The first turntable 5 and the second turntable 7 are coaxially connected by a non-circular shaft 13, and the stator 6 is installed between the first turntable 5 and the second turntable 7. As shown in Figure 14, the coaxial connection of the non-circular shaft 13 to the first turntable 5 and the second turntable 7 requires that the inlet window 5-1 of the first turntable and the inlet window 7-1 of the second turntable be rotated out of alignment by 90°. Thus, when the first turntable 5 and the second turntable 7 rotate coaxially, the low-pressure liquid chamber 5-2 and the pressure relief liquid chamber 7-3 are always completely aligned and fully connected through the corresponding partial channels of the stator 6, ensuring the stable operation of the pressure relief process; the pressurizing liquid chamber 5-3 and the high-pressure liquid chamber 7-2 are always completely aligned and fully connected through the corresponding partial channels of the stator 6, ensuring the stable operation of the pressurizing process. In this way, the coaxial rotation of the first turntable 5 and the second turntable 7 ensures that each stator channel 6-1 sequentially performs the pressurizing process, the high-pressure sealing process, the pressure relief process, and the low-pressure sealing process, avoiding cross-flow between high and low pressure fluids.

[0097] The first sleeve 4 is installed on the outer periphery of the first turntable 5, and the second sleeve 8 is installed on the outer periphery of the second turntable 7. Furthermore, the inner diameter of the first sleeve 4 matches the inner diameter of the first cylinder 15, and the outer diameter of the second sleeve 8 matches the inner diameter of the second cylinder 14. The first sleeve 4 and the second sleeve 8 have the same structure and are symmetrically arranged. Here, only the first sleeve 4 will be described in detail; the second sleeve 8 will not be described further.

[0098] As shown in Figures 15-18, the first sleeve 4 is a cylindrical structure with an inner cavity and a cylinder wall. Its inner cavity consists of a turntable mounting cavity 4-4, a sleeve flow cavity 4-5, and a pipe limiting cavity 4-6. Its cylinder wall is provided with a spiral guide vane 4-1 and a sleeve threaded hole 4-3.

[0099] The sleeve threaded holes 4-3 are provided on the end face of the first sleeve 4 facing the stator 6, and are evenly distributed in a ring on the end face, for fixed connection with the stator bolt holes 6-3 corresponding to the position by bolts.

[0100] The turntable mounting cavity 4-4, the sleeve flow cavity 4-5, and the pipe limiting cavity 4-6 are arranged sequentially from the end near the stator 6 to the end away from the stator 6. The inner diameter of the turntable mounting cavity 4-4 is larger than that of the pipe limiting cavity 4-6, and the inner diameter of the pipe limiting cavity 4-6 is larger than that of the sleeve flow cavity 4-5. The turntable mounting cavity 4-4 is used to mount and limit the first turntable 5. A certain gap is provided on both the end face and the circumference of the first turntable 5 and the turntable mounting cavity 4-4. This gap is filled with fluid to form a gap liquid film, which has a lubricating effect, reducing the driving resistance torque and the friction wear of the mating friction pair. The pipe limiting cavity 4-6 is used to mate with the end of the first dividing pipe section of the pressurized liquid outlet pipe 1. A sealing structure is provided between the pipe limiting cavity 4-6 and the pressurized liquid outlet pipe 1 to ensure that the inside and outside of the first dividing pipe section of the pressurized liquid outlet pipe 1 are always not connected. While the connecting pipe limiting cavity 4-6 is set outside the pressurized liquid outlet connecting pipe 1, it also enables the sleeve flow cavity 4-5 to be connected to the pressurized liquid collection cavity 2.

[0101] The spiral guide vanes 4-1 are evenly distributed in a ring within the wall of the first sleeve 4. A spiral guide cavity 4-2 is formed between adjacent spiral guide vanes 4-1. The spiral guide cavity 4-2 is connected to the low-pressure liquid distribution cavity 3 at the end face of the first sleeve 4 opposite to the stator 6, and is connected to the turntable mounting cavity 4-4 on the inner surface of the first sleeve 4. The main body of the spiral guide vane 4-1 is a spiral structure with a certain thickness and width. The spiral guide cavity 4-2 formed by it includes a distribution section and an acceleration section along the fluid flow direction. The fluid from the low-pressure liquid distribution cavity 3 first enters the distribution section of the spiral guide cavity 4-2, where the spiral degree is relatively small, mainly to achieve further uniform distribution of the incoming fluid. Then it enters the acceleration section of the spiral guide cavity 4-2, where the spiral degree increases and the cross-section gradually contracts along the fluid flow direction, achieving an acceleration effect on the fluid flow. Finally, through the connection between the end of the acceleration section and the turntable mounting cavity 4-4, the fluid flow direction is further transformed into circumferential inflow. The liquid flows into the low-pressure liquid chamber 5-2 through the inlet window 5-1 of the first turntable, and hydraulically impacts the inner wall of the chamber, generating a driving torque that drives the first turntable 5 to rotate. Due to the arrangement of multiple spiral guide vanes 4-1 and spiral guide chambers 4-2, a continuous driving torque is provided to make the first turntable 5 rotate continuously at a constant speed, thus completing the continuous switching of the pressure increase and decrease process of the device.

[0102] The working process of the above-mentioned self-driven dual-rotary energy recovery device is as follows:

[0103] In the working state shown in Figure 1, high-pressure liquid flows into the high-pressure liquid distribution chamber 9 through the high-pressure liquid inlet pipe 12, and then enters each spiral guide chamber of the second sleeve 8. Under the unique structure of its spiral guide vanes, the inflow fluid is evenly distributed, accelerated, and circumferentially inflowed. Afterwards, it enters through the second turntable inlet window 7-1 of the second turntable 7 and impacts the inner wall of the high-pressure liquid chamber 7-2, driving the second turntable 7 to rotate continuously. Then, it enters the part of the stator channel 6-1 that connects the stator 6 and the high-pressure liquid chamber 7-2, pressurizing the low-pressure liquid pre-filled in the stator channel 6-1. The pressurized liquid then passes through the pressurization liquid chamber 5-3 of the first turntable 5, the first turntable flow window 5-5, and enters the central cavity 5-8 of the first turntable from this part of the stator channel 6-1. It then enters the pressurization liquid collection chamber 2 through the sleeve flow chamber 4-5 of the first sleeve 4, and finally exits the device through the pressurization liquid outlet pipe 1. This is the pressurization process.

[0104] Meanwhile, low-pressure liquid flows into the low-pressure liquid distribution chamber 3 through the low-pressure liquid inlet pipe 16, and then enters each spiral guide chamber 4-2 of the first sleeve 4. Under the unique structure of its spiral guide vanes 4-1, the inflow fluid is evenly distributed, accelerated, and circumferentially inflowed. Afterward, it enters through the first turntable inlet window 5-1 of the first turntable 5 and impacts the inner wall of the low-pressure liquid chamber 5-2, driving the first turntable 5 to rotate continuously. Then, it enters the part of the stator channel 6-1 that connects the stator 6 and the low-pressure liquid chamber 5-2, depressurizing the high-pressure liquid that has completed the pressurization process. The depressurized liquid then passes through the depressurization liquid chamber 7-3 of the second turntable 7, the flow window 7-4 of the second turntable, and enters the central cavity 7-7 of the second turntable. It then enters the depressurization liquid collection chamber 10 through the sleeve flow chamber of the second sleeve 8, and finally exits the device through the depressurization liquid outlet pipe 11. This is the depressurization process.

[0105] At the same time, a small portion of the stator channels 6-1 that are not covered by the liquid chambers during the pressurization and depressurization processes are in a high-pressure or low-pressure sealing process.

[0106] As the first turntable 5 and the second turntable 7 rotate one revolution on the same axis, each stator channel 6-1 will sequentially undergo a pressurization process, a high-pressure sealing process, a pressure relief process, and a low-pressure sealing process, repeating this cycle continuously, thereby realizing a continuous pressure exchange process between high and low pressure fluids and achieving continuous recovery and utilization of high-pressure liquid pressure energy.

[0107] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many specific modifications under the guidance of the present invention without departing from the spirit of the invention and the scope of protection of the claims, and these modifications all fall within the scope of protection of the present invention.

Claims

1. A self-driven dual-rotor energy recovery device, characterized in that, The system includes a first cylindrical body and a second cylindrical body with identical and symmetrical arrangement. The first cylindrical body and the second cylindrical body are joined at their first ends and fixed by a flange, with a seal at the connection. The internal space of the first cylindrical body and the second cylindrical body houses a coaxially arranged irregularly shaped shaft, a stator, a first turntable, a second turntable, a first sleeve, and a second sleeve. The stator is located at the middle position of the first cylindrical body and the second cylindrical body. The first turntable and the first sleeve are located at one end of the stator, and the second turntable and the second sleeve are located at the other end of the stator. The first sleeve and the second sleeve are respectively installed on the outer periphery of the first turntable and the second turntable. The first sleeve and the second sleeve are fixedly connected to the stator by bolts. A turntable and a second turntable are coaxially and offsetly connected at both ends of the stator via an irregularly shaped shaft; the first cylinder has a pressurized liquid outlet pipe coaxially disposed at its second end and a low-pressure liquid inlet pipe radially disposed at its second end; the pressurized liquid outlet pipe includes a first dividing pipe section extending into the interior of the first cylinder; the interior space of the first dividing pipe section is a pressurized liquid collecting chamber, which communicates with the inner cavity of the pressurized liquid outlet pipe; the annular space between the first dividing pipe section and the first cylinder is a low-pressure liquid distribution chamber, which communicates with the inner cavity of the low-pressure liquid inlet pipe; the second cylinder has a pressure relief liquid outlet pipe coaxially disposed at its second end and a high-pressure liquid inlet pipe radially disposed at its second end. The stator includes a pressure relief liquid outlet pipe; the pressure relief liquid outlet pipe includes a second partition pipe section extending into the interior of the second cylinder; the interior space of the second partition pipe section is a pressure relief liquid collection chamber, which communicates with the inner cavity of the pressure relief liquid outlet pipe; the annular space between the second partition pipe section and the second cylinder is a high-pressure liquid distribution chamber, which communicates with the inner cavity of the high-pressure liquid inlet pipe; the two end sections of the stator are expanded outward relative to the middle section, and the outer diameter of the two end sections matches the inner diameter of the first cylinder and the second cylinder; the expanded portions of the two end sections of the stator are fixedly connected to the first sleeve and the second sleeve respectively by bolts; the stator has an axially penetrating central hole for passing through... The irregular shaft has multiple axially penetrating stator channels arranged around its central hole in a ring-shaped manner. The irregular shaft includes a central main body and two end studs (first and second studs). The radial cross-section of the main body is polygonal, and the first and second studs are cylinders with external threads. The first turntable has two annularly distributed low-pressure liquid chambers and two pressurized liquid chambers, with the two low-pressure chambers and two pressurized liquid chambers facing each other. Both the low-pressure and pressurized liquid chambers are axially penetrating along the first turntable. Two first turntable inlet windows are arranged opposite each other on the circumferential side of the first turntable, and each of the two first turntable inlet windows is connected to one of the two low-pressure liquid chambers.The first turntable has a coaxially arranged central cavity. The central cavity is open towards the outer end face of the first turntable and partially closed towards the inner end face due to the presence of a first turntable limiting groove and bolt holes. The central cavity is connected to the two pressurized fluid chambers via flow windows. The first turntable limiting groove and bolt holes are coaxially located at the center of the inner end face of the first turntable. The bolt holes are used to connect with the first stud portion of the irregular shaft, and the limiting groove is used to engage with the main body portion of the irregular shaft. The second turntable has two annularly distributed high-pressure fluid chambers and two pressure-relief fluid chambers, with the two high-pressure fluid chambers positioned opposite each other. The two pressure relief chambers are arranged opposite to each other; both the high-pressure chamber and the pressure relief chamber are axially connected to the second turntable; two second turntable inlet windows are arranged opposite to each other on the circumferential side of the second turntable, and the two second turntable inlet windows are respectively connected to the two high-pressure chambers; the second turntable has a coaxially arranged second turntable central cavity, which is open towards the outer end face of the second turntable and partially closed towards the inner end face of the second turntable due to the presence of the second turntable limiting groove and the second turntable bolt hole; the second turntable central cavity is connected to the two pressure relief chambers respectively through the second turntable flow window; the second turntable limiting groove and the second turntable bolt hole are coaxially arranged at the center of the inner end face of the second turntable. The second turntable bolt hole is used to connect and mate with the second stud portion of the irregular shaft, and the second turntable limiting groove is used to mate with the main body portion of the irregular shaft; the irregular shaft is coaxially offset connected to the first turntable and the second turntable, so that the flow inlet window of the first turntable and the flow inlet window of the second turntable are rotated and offset by 90°; the first sleeve and the second sleeve have the same structure and are symmetrically arranged, and the outer diameter of the first sleeve and the second sleeve matches the inner diameter of the first cylinder body and the second cylinder body; the inner cavity of the first sleeve and the second sleeve are both composed of a turntable mounting cavity, a sleeve flow cavity, and a pipe limiting cavity, and the turntable mounting cavity, the sleeve flow cavity, and the pipe limiting cavity extend from the end near the stator to the end away from the stator. One end is sequentially arranged; spiral guide vanes are evenly distributed in a ring in the cylinder walls of the first sleeve and the second sleeve, and a spiral guide cavity is formed between adjacent spiral guide vanes; the turntable mounting cavity of the first sleeve is used to install the first turntable, and a gap liquid film can be formed between the end face and the circumferential surface of the first turntable and the turntable mounting cavity; the pipe limiting cavity of the first sleeve is matched with the end of the first dividing pipe section of the pressurized liquid outlet pipe and is sealed, while realizing the communication between the sleeve flow cavity and the pressurized liquid collection cavity; and the sleeve flow cavity of the first sleeve is connected to and communicates with the central cavity of the first turntable; one end of the spiral guide cavity of the first sleeve is connected to the low-pressure liquid distribution cavity, and the other end is connected to the turntable mounting cavity of the first sleeve;The second sleeve's rotary mounting cavity is used to mount the second rotary disk, and a gap liquid film can be formed between the end face and the circumferential surface of the second rotary disk and the rotary mounting cavity; the second sleeve's connecting pipe limiting cavity mates with the end of the second dividing pipe section of the pressure relief liquid outlet connecting pipe and is sealed, while simultaneously achieving communication between the sleeve's flow cavity and the pressure relief liquid collecting cavity; furthermore, the second sleeve's flow cavity is connected to and communicates with the central cavity of the second rotary disk; one end of the second sleeve's spiral guiding cavity is connected to the high-pressure liquid distribution cavity, and the other end is connected to the rotary mounting cavity of the second sleeve. The spiral guide cavity is connected to the fluid flow cavity; the spiral guide cavity includes a uniform distribution section and an acceleration section sequentially along the fluid flow direction; the uniform distribution section communicates with the low-pressure liquid uniform distribution cavity at the end face of the first sleeve and with the high-pressure liquid uniform distribution cavity at the end face of the second sleeve, and the uniform distribution section is used to further uniformly distribute the fluid from the low-pressure liquid uniform distribution cavity or the high-pressure liquid uniform distribution cavity; the acceleration section communicates with the turntable mounting cavity at the inner cavity surfaces of the first sleeve and the second sleeve, and the acceleration section is used to accelerate the flow and convert the fluid into a circumferential inflow at its end.

2. The self-driven dual-rotary energy recovery device according to claim 1, characterized in that, The pressurized liquid outlet pipe and the low-pressure liquid inlet pipe are integrally formed with the first cylinder body, and the pressure relief liquid outlet pipe and the high-pressure liquid inlet pipe are integrally formed with the second cylinder body.

3. The self-driven dual-rotary energy recovery device according to claim 1, characterized in that, The extended portions at both ends of the stator are provided with axially penetrating stator bolt holes, which are evenly distributed in a ring on the end face of the stator; the first sleeve and the second sleeve have evenly distributed threaded holes in a ring on their end faces facing the stator; the stator bolt holes and the threaded holes are used to achieve a fixed connection between the stator and the first sleeve and the second sleeve, respectively.

4. The self-driven dual-rotary energy recovery device according to claim 1, characterized in that, The stator is further provided with a sealing ring mounting groove on the outward expansion portion at one end. The sealing ring mounting groove is used to install a sealing ring to achieve a seal between the stator and the first cylinder or the second cylinder.

5. A self-driven dual-rotary energy recovery device according to claim 1, characterized in that, The stator channels are distributed in a single ring or in multiple concentric circles.

6. The self-driven dual-rotary energy recovery device according to claim 1, characterized in that, The pressurized liquid chamber, which was originally axially connected to the first turntable, is now open on the inner end face of the first turntable and partially closed on the outer end face of the first turntable due to the provision of the first turntable adjustment hole.

7. A self-driven dual-rotary energy recovery device according to claim 1, characterized in that, The inner wall surfaces of the low-pressure liquid chamber and the pressurizing liquid chamber are smooth arc-shaped surfaces, and the inner wall surfaces of the high-pressure liquid chamber and the depressurizing liquid chamber are smooth arc-shaped surfaces.

8. A self-driven dual-rotary energy recovery device according to claim 1, characterized in that, The inner diameter of the turntable mounting cavity is larger than that of the pipe limiting cavity, and the inner diameter of the pipe limiting cavity is larger than that of the sleeve flow cavity.

9. A self-driven dual-rotary energy recovery device according to claim 1, characterized in that, The acceleration section has a greater degree of spiraling and a smaller cross-sectional width compared to the uniformly distributed section.

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