A fluid driven centrifuge

Abstract

The present invention discloses a fluid-driven centrifuge, which uses fluid, such as hydraulic oil, water or compressed air, as energy to drive a separation device to move. The centrifuge has a simple structure, large torque, high speed, high transmission efficiency, low energy consumption and small vibration, and can well meet the centrifuge's requirements for torque, speed and running stability. At the same time, the fluid power device includes an outer ring and a core body, and at least one-step secondary flow channel is provided between the nozzle and the discharge port on the outer ring surface of the core body. The fluid enters from the inlet channel, is ejected step by step through the nozzle of the core body and the secondary flow channel, and acts on at least two driving recesses on the circumference of the outer ring, generating thrust for these driving recesses to drive the outer ring to rotate and do work, thereby realizing power output. Finally, the fluid is discharged through the discharge port of the core body via the discharge channel.

Description

Technical Field

[0001] The invention discloses a fluid driven centrifuge, which belongs to the technical field of industrial mechanical devices according to the International Patent Classification (IPC). Background Art

[0002] The various existing centrifuges mostly use an engine and a centrifugal device. Since the centrifugal device needs a higher speed and a larger torque when rotating at high speed, and needs to isolate the engine vibration to the maximum extent, the existing engines, whether electric motors or internal combustion engines, cannot meet the actual use requirements well.

[0003] The current research direction of gas engines is to develop compact, efficient and reliable small engines. Most of them are in the test and trial production stage and have not yet been widely used in commercial applications. At present, most gas engine design prototypes are based on piston engines or vane pumps. They achieve energy conversion through heat exchangers to achieve power output, but they have complex structures and low efficiency, making it difficult to meet the requirements of endurance.

[0004] The main methods of converting hydraulic energy into mechanical energy are hydraulic engines and hydraulic pumps. Hydraulic energy is mainly converted through piston structures, blades, or gears to obtain torque and speed output. Due to the limitations of the original structure and principle, the existing devices have many parts, complex structures, low efficiency, and it is difficult to obtain large torque and speed at the same time.

[0005] In order to further improve the engine performance, meet the working requirements of the centrifuge, and achieve compact structure, efficient and reliable power generation and output, the inventor has conducted many years of development and research, and thus proposed the present invention. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a fluid-driven centrifuge. Through the multi-stage flow channels circumferentially arranged on the core of the fluid power device, the energy of the fluid is utilized multiple times, and the core drives the rotating outer ring to achieve power output. The centrifuge has the advantages of compact structure, large torque, high speed, high transmission efficiency, energy saving and environmental protection.

[0007] To achieve the above object, the present invention is achieved through the following technical solutions:

[0008] A fluid driven centrifuge, characterized in that it comprises a separation device and a fluid power device for driving the separation device, characterized in that the fluid power device comprises:

[0009] An outer ring, whose inner ring surface is provided with a plurality of driving recesses in the circumferential direction;

[0010] A core body is coaxially arranged in the outer ring and can rotate relative to the outer ring, and the outer ring surface of the core body is provided with at least one nozzle, at least one discharge port, and at least one flushing channel located between the nozzle and the discharge port;

[0011] at least one inlet channel connected to at least one nozzle; and

[0012] at least one drainage channel communicating with at least one drainage port;

[0013] The fluid enters from the inlet channel, is ejected step by step through the nozzle of the core body and the secondary flow channel, and acts on at least two driving recesses on the circumference of the outer ring, generating thrust for these driving recesses to drive the outer ring to rotate and do work, thereby realizing power output. Finally, the fluid is discharged through the discharge port of the core body via the discharge channel.

[0014] Furthermore, at least one inlet channel, at least one nozzle, at least two driving recesses, at least one primary flow channel, at least one outlet and at least one discharge channel form an independent working unit, and the fluid power device includes at least one independent working unit.

[0015] Furthermore, the nozzles and secondary flow channels on the core body are connected to the driving recesses corresponding to the outer ring. The secondary flow channels are arranged alternately and connected in sequence with the corresponding driving recesses. The secondary flow channels are arranged circumferentially along the core body or the outer ring.

[0016] Further, an inlet channel and an outlet channel are formed in the core.

[0017] Furthermore, the core includes:

[0018] The inlet channel has a nozzle formed on the peripheral surface of the core body, and its direction is an arc line extending from the middle to the outside. The nozzle is connected with the driving concave portion corresponding to the outer ring to form a first-stage flow channel;

[0019] The secondary flow channel is an arc line extending from the edge of the core body inward and then bending to the edge. Each secondary flow channel is connected with the front and rear driving recesses corresponding to the outer ring, forming N-step flow channels along the circumference of the core body, where N is a natural number ≥ 2;

[0020] Each step of the flow channel cooperates with the corresponding driving recess of the outer ring to form a multi-step stroke structure with decreasing fluid energy.

[0021] Furthermore, the secondary flow channel includes a return channel and a communicating stroke channel, the return channel is communicated with a driving recess corresponding to the outer ring, and the stroke channel is communicated with another driving recess.

[0022] Furthermore, the direction of the core inlet channel is a logarithmic spiral extending from the middle to the outside, the pole of the logarithmic spiral is arranged on the central axis of the core, and the direction angle of the logarithmic spiral is 15°-45°.

[0023] Furthermore, an inlet channel is provided on the core body, and its direction is a logarithmic spiral extending from the middle to the outside, and the direction of the stroke channel of the secondary flow channel is a logarithmic spiral. The direction of the logarithmic spiral of the stroke channel of the secondary flow channel is roughly the same as the direction of the logarithmic spiral of the inlet channel.

[0024] Furthermore, the fluid power device also includes a shaft, and the outer ring and the core are coaxially arranged on the shaft.

[0025] Furthermore, the fluid power device also includes a shaft, the outer ring is coaxially arranged on the shaft with the core body, and the shaft is provided with inlet and outlet flow channels which are respectively connected to the inlet channel and the outlet channel of the core body.

[0026] The inlet and outlet flow channels in the shaft form an inlet and an outlet, and the inlet and outlet flow channels are non-connected structures.

[0027] Furthermore, the outer ring is matched with the shaft through the side plates to form a closed space, and the core body is arranged in the closed space and is connected and fixed to the shaft.

[0028] Furthermore, the inlet channel, the nozzle, the driving recess, the secondary flow channel, the exhaust port and the discharge channel in the independent working unit constitute a fluid flow path.

[0029] Furthermore, the fluid power device includes more than two independent working units to form a multi-stage driving structure, and is arranged along the circumference of the core or the outer ring.

[0030] Furthermore, more than two driving recesses are arranged on the inner ring surface of the outer ring, and each driving recess has a contour bottom surface and a driving surface. The contour line of the contour bottom surface is a logarithmic spiral line, and its pole is arranged at the center of the core body.

[0031] Furthermore, the separation device includes a separation cover and a rotating impeller arranged in the separation cover, the fluid power device and the rotating impeller are connected to each other through a transmission mechanism, or the rotating impeller is integrally formed / fixedly connected to the outer ring of the fluid power device.

[0032] The fluid driven centrifuge of the present invention uses fluid, such as hydraulic oil, water or compressed air, as energy to drive the separation device to move. It has a simple structure, large torque, high speed, high transmission efficiency, low energy consumption, and small vibration, and can well meet the centrifuge's requirements for torque, speed and running stability.

[0033] The fluid power device of the present invention has the following beneficial effects on the fluid centrifuge:

[0034] 1. The core body of the present invention is provided with multiple-stage flow channels, i.e., the inlet channel is used as the first-stage flow channel, and each secondary flow channel is used as the second, third, fourth...stage flow channel. The fluid acts on the driving recess of the outer ring from the first-stage flow channel, and the driving recess is connected to the second-stage flow channel. Then, it returns to the second-stage flow channel and acts on another driving recess of the outer ring, and so on, until the fluid is discharged from the discharge channel. The whole process is carried out in the forward direction of the outer ring rotation direction, with large torque, high transmission efficiency, high fluid utilization rate, and the output torque further increases with the increase of the rotation speed, meeting the rotation requirements of the separation device.

[0035] 2. The flow channels arranged circumferentially on the core of the present invention effectively reduce the volume of the overall device and can be flexibly matched with power generation or output equipment in various fields. At the same time, the more inlet channels are set on the core, the lower the overall weight is, which further improves the output speed and efficiency of the device; the separation efficiency is higher and the separation effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a side view of the fluid centrifuge according to the first embodiment of the present invention;

[0037] Figure 2 is a partial cross-sectional view of a fluid centrifuge according to a first embodiment of the present invention;

[0038] Figure 3 It is a schematic diagram of the fluid power device according to the first embodiment of the present invention.

[0039] Figure 4 It is a side view along axis A of the fluid power device according to the first embodiment of the present invention.

[0040] Figure 5 It is a side view along axis B of the fluid power device according to the first embodiment of the present invention.

[0041] Figure 6 It is a cross-sectional view of the fluid power device according to the first embodiment of the present invention.

[0042] Figure 7 This is another layout diagram of the fluid power device according to the first embodiment of the present invention.

[0043] Figure 8 It is a schematic diagram of a fluid power device according to the second embodiment of the present invention.

[0044] Fig. 9 It is a side view along axis C of the fluid power device according to the second embodiment of the present invention.

[0045] Fig.10 It is a side view along axis D of the fluid power device according to the second embodiment of the present invention.

[0046] Fig.11 It is a radial cross-sectional view of the fluid power device according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0047] The present invention will be further described below in conjunction with the accompanying drawings:

[0048] Embodiment 1:

[0049] Combination Figure 1 and Figure 2 As shown, this embodiment provides a fluid-driven centrifuge, which includes a frame 5, with a separation device 6 and a fluid power device 9 provided on both sides of the frame, the separation device 6 has a separation cover and a rotating impeller 7 arranged inside the separation cover, the fluid power device 9 is connected to the rotating impeller 7 through a transmission mechanism 8, and preferably, the transmission mechanism 8 includes a pulley assembly and a friction clutch assembly.

[0050] See also Figures 3 to 6 The fluid power device of this embodiment includes an outer ring 1, whose inner ring surface is circumferentially provided with a plurality of driving recesses 11, and the outer ring 1 is in transmission connection with the transmission mechanism 8; a core body 3, which is coaxially arranged in the outer ring 1 and can rotate relative to the outer ring, and the outer ring surface of the core body 3 is provided with at least one nozzle 301, at least one outlet 302, and at least one flushing channel 300 located between the nozzle and the outlet; the fluid used in the fluid power device is usually a Newtonian fluid or a non-Newtonian fluid, and Newtonian fluid is usually selected, including a gas fluid or a liquid fluid, and the fluid pressure input to the power device can be generated by a compressor (such as a hydraulic pump or a pneumatic pump), a container for compressed fluid (such as a high-pressure gas cylinder), or from the environment (such as water flow, wind flow), etc.

[0051] At least one inlet channel 31, which is connected to at least one nozzle 301, and the pipeline of the inlet channel 31 is connected to the high-pressure gas source or hydraulic source of the factory for passing fluid;

[0052] and at least one drainage channel 310 communicating with at least one drainage port 302;

[0053] The fluid enters from the inlet channel 31, and is ejected step by step through the nozzle 301 of the core body 3 and the secondary flow channel 300, acting on at least two driving recesses 11 on the circumference of the outer ring 1, generating thrust on these driving recesses 11 to drive the outer ring 1 to rotate and do work, thereby achieving continuous power output, and finally, the fluid is discharged through the discharge port of the core body 3 and the discharge channel. The fluid power device also includes a shaft 2, and the outer ring 1 and the core body 3 are coaxially arranged on the shaft 2.

[0054] like Figure 6As shown, the inlet channel 31 and the outlet channel 310 are formed in the core body 3, and the nozzle 301 and the secondary flow channel 300 on the core body 3 are connected with the driving recess 11 corresponding to the outer ring 1, wherein the secondary flow channel 300 and the corresponding driving recess 11 are arranged alternately and connected in sequence, and the secondary flow channel 300 is arranged along the circumference of the core body or the outer ring.

[0055] like Figure 6 The core 3 includes: an inlet channel 31, which forms a nozzle 31 on the peripheral surface of the core, and its direction is an arc line extending from the middle to the outside, and the nozzle 301 is connected with the driving recess 11 corresponding to the outer ring to form a first-stage flow channel;

[0056] The secondary flushing channel 300 is an arc line extending from the edge of the core 3 inward and then bending to the edge. Each flushing channel 300 is connected with the front and rear driving recesses 11 corresponding to the outer ring 1, forming N-stage flow channels along the circumference of the core, where N is a natural number ≥ 2. It should be noted that if it is a 2-stage flow channel, it includes the 1st-stage flow channel (inlet channel) and the 2nd-stage flow channel (primary flushing channel); if it is a 3-stage flow channel, it includes the 1st-stage flow channel (inlet channel), the 2nd-stage flow channel (primary flushing channel), the 3rd-stage flow channel (another secondary flushing channel), ...

[0057] Each step of the flow channel cooperates with the corresponding driving recess of the outer ring to form a multi-step stroke structure with decreasing fluid energy.

[0058] The fluid power device can be designed according to the load requirements, in which the core 3 can be set to a 2-stage flow channel, a 3-stage flow channel, or more stages of inlet channels. Each stage cycle does work, fully utilizes energy, and maximizes the use efficiency to meet the output torque and speed requirements.

[0059] like Figure 7 Schematic diagram of a 4-stage flow channel. After the compressed fluid enters from the 1st-stage flow channel 311, it passes through the 2nd, 3rd, and 4th-stage flow channels 312, 313, and 314, and is ejected to act on the corresponding driving recess 11, and finally is output through the discharge channel 310; Figure 6 This is a schematic diagram of the 5-stage inlet channel. The working process is the same as Figure 7 The schematic is similar. Figure 7 The secondary flow channel 300 includes a return channel and a connected stroke channel, such as Figure 7 The return path 3131 and the connected stroke path 3132 in the third-stage flow channel, the return path 3131 is connected to the driving recess corresponding to the outer ring, and the stroke path 3132 is connected to another driving recess.

[0060] See also Figure 3The fluid power device also includes a shaft 2, the outer ring 1 and the core 3 are coaxially arranged on the shaft 2, and the shaft 2 is provided with inlet and outlet flow channels 21, 210 respectively connected to the inlet channel 31 and the discharge channel 310 of the core 3. The inlet and outlet flow channels in the shaft form an inlet and an outlet, and the inlet and outlet flow channels are non-connected structures. The outer ring 1 is matched with the shaft 2 through the side plates 41, 42 to form a closed space, and the core 3 is arranged in the closed space and connected and fixed to the shaft 2. In the present invention, the core 3 is provided with at least two steps of flow channels, each step of the flow channel is connected to the driving recess corresponding to the outer ring, and finally the fluid is discharged from the discharge channel.

[0061] See also Figure 3 In the present invention, the core body 3 can be formed by the cooperation of a left core body and a right core body. The cooperation surfaces of the left core body and the right core body are provided with an inlet channel 31 and a discharge channel 310. The core body 3 can also be integrally cast.

[0062] See also Figure 3 , Figure 6 This embodiment is a primary drive structure. A fluid channel is arranged circumferentially on the core 3 to form a primary drive structure. The fluid channel is also called an independent working unit. An inlet channel 31, a nozzle 301, at least two driving recesses 11, at least one primary flow channel 300, a discharge port 302 and a discharge channel 310 on the core 3 and the outer ring 1 form an independent working unit. The fluid power device includes at least one independent working unit. The inlet channel 31, the nozzle 301, the driving recess 11, the secondary flow channel 300, the discharge port 302 and the discharge channel 310 in the independent working unit constitute a fluid flow path.

[0063] See also Figure 3 , Figure 6 or Figure 7 In the present invention, more than two driving recesses 11 are arranged on the inner ring surface of the outer ring 1, each driving recess has a contour bottom surface 111 and a driving surface 112, the contour line of the contour bottom surface 111 can be a common arc line or a spiral line, when the contour line of the contour bottom surface is a logarithmic spiral line, its pole is set on the axis, each driving recess 11 is also connected with the adjacent step flow channel so that the fluid entering the previous step flow channel is output by the next step flow channel.

[0064] In the present invention, the flow inlet channel of the core body 3, i.e. the first-stage flow channel, can be oriented in a common arc line or a spiral line, and the stroke channels in each secondary flow channel, i.e. the Nth-stage flow channel, can also be oriented in a common arc line or a spiral line.

[0065] like Figure 6 and Figure 7The core body 3 of the present invention is provided with an inlet channel 31, which runs in a logarithmic spiral extending from the middle to the outside. The stroke channel of the secondary flow channel 300 runs in a logarithmic spiral, and the logarithmic spiral of the stroke channel of the secondary flow channel runs in a direction substantially the same as the logarithmic spiral of the inlet channel. The inlet channel of the core body 3 runs in a logarithmic spiral extending from the middle to the outside, and the pole of the logarithmic spiral is set on the central axis of the core body. The logarithmic spiral runs in an angle of 15°-45°. The smaller the angle, the longer the flow channel and the more the loss. The larger the angle, the smaller the tangential component of the driving outer ring.

[0066] See also Figure 3 , Figure 4 and Figure 5 In the present invention, the inlet and outlet channels 21 and 210 in the shaft 2 form an inlet and an outlet, and the inlet and outlet channels are non-connected structures. The inlet and outlet of the shaft can be set at one end or both ends of the shaft, the inlet channel 21 is connected to the inlet channel 31 of the core body, and the outlet of the shaft extends axially to form the outlet channel 210, which is connected to the discharge channel 310 of the core body.

[0067] The fluid power device involved in this application refers to a device that can convert fluid energy into mechanical rotation, wherein the device may include other components in addition to the necessary outer ring, core body and its corresponding recessed structure or flow channel structure design; for example, it may include a housing and a sealing structure for providing external protection, or a coupling for providing torque transmission. The outer ring may have different specific forms according to different mechanical rotation output modes, such as an outer toothed structure formed on the outer side of the outer ring to facilitate the output of kinetic energy through gear transmission; another example is that the outer ring has a belt groove to output kinetic energy through belt transmission; another example is that the outer ring has a mounting flange to facilitate the installation of a coupling to output kinetic energy; and so on. The core body and the outer ring are made of hard materials, not limited to metals, metal alloys, plastics, and composite materials. The processing methods of the recessed structure or flow channel structure of the core body and the outer ring can be realized by all known production means, including but not limited to die casting, forging, extrusion, 3D printing, and so on. The fluid pressure input to the power device can be generated by a compressor (such as a hydraulic pump or a pneumatic pump), a container of compressed fluid (such as a high-pressure gas cylinder), or originate from the environment (such as water flow, wind flow), etc.

[0068] Figure 3 and Figure 6 It should be noted that the inlet channel 31 and the outlet channel 310 of the core body and the inlet shaft channel 21 and the outlet shaft channel 210 do not correspond to each other according to the drawing rules, but for the sake of illustration, Figure 3 The inlet channel and the outlet channel of the core body refer to the inlet channel and the outlet channel. Figure 8 and Fig.11 A similar schematic diagram is shown here.

[0069] Embodiment 2:

[0070] The fluid driven centrifuge of this embodiment is basically the same as that of embodiment 1, with the main differences being:

[0071] See also Figures 8 to 11 The fluid power device includes two independent working units to form a secondary driving structure, that is, two fluid channels are arranged circumferentially on the core 3, each fluid channel includes an inlet channel 31 of more than one order and a secondary flow channel 300 and a discharge channel arranged circumferentially along the core 3. The fluid power device comprises an outer ring 1, whose inner ring surface is provided with a plurality of driving recesses 11 on the circumference; a core body 3, which is coaxially arranged in the outer ring 1 and can rotate relative to the outer ring, and the outer ring surface of the core body is provided with two groups of nozzles and outlets, and at least one primary flow channel is provided between each group of nozzles and outlets; the core body is provided with two inlet channels 31, 32, which correspond to the connected nozzles; and two discharge channels 310, 320, which correspond to the connected outlets; two streams of fluid enter from the two inlet channels of the core body respectively, and are ejected step by step through the nozzles of the core body 3 and the secondary flow channel 300, acting on the corresponding driving recesses 11 on the circumference of the outer ring, generating thrust on these driving recesses to drive the outer ring 1 to rotate and do work, realizing power output, and finally, the fluid is discharged through the outlet of the core body through the discharge channel. The above-mentioned one inlet channel, one nozzle, a corresponding number of driving recesses and corresponding secondary flow channels, outlets and one discharge channel form an independent work unit.

[0072] The fluid power device also includes a shaft 2, and the outer ring 1 is coaxially arranged on the shaft with the core 3. The shaft 2 is provided with inlet shaft channels 21, 22 and outlet shaft channels 210, 220, which are respectively connected to the inlet channels 31, 32 and the discharge channels 310, 320 of the core. The shaft 2 is provided with two inlets and two outlets corresponding to the fluid channels; the compressed fluid enters from the two inlets of the shaft 2, and is ejected through the inlet channel of the core 3 to act on the driving recess 11 of the outer ring 1, generating thrust to drive the outer ring 1 to rotate and do work, and finally the compressed fluid returns to the corresponding outlet through the discharge channel of the core 3, realizing continuous output of power. The other structures are the same as those in Example 1 and will not be repeated.

[0073] Embodiment 3:

[0074] This embodiment is basically the same as the first embodiment, and the main difference is that the fluid power device of the present invention includes 4 or more independent working units to form a multi-stage driving structure, and 3 or more fluid channels are arranged circumferentially on the core body, and each fluid channel includes more than one inlet channel and secondary flow channel and a discharge channel arranged circumferentially along the core body, and the inlet channel and the discharge channel are arranged on the mating surfaces of the left and right core bodies. The shaft is provided with inlet channels and outlet channels corresponding to the number of fluid channels, and the compressed fluid enters from the inlet channel of the shaft, and is ejected through the inlet channel of the core body to act on the driving recess of the outer ring, pushing the outer ring to rotate and do work, thereby realizing continuous power output, and finally the compressed fluid returns to the corresponding outlet channel through the discharge channels of the core body. The other structures are the same as those in the first embodiment.

[0075] Of course, in the fluid-driven centrifuge in this embodiment, the fluid power device and the rotating impeller are connected through a transmission mechanism. Those skilled in the art should understand that in other specific embodiments, the rotating impeller can be integrally formed on the outer ring of the fluid power device, or the rotating impeller can be directly connected to the outer ring of the fluid power device, and the technical effect of this embodiment can be achieved.

[0076] The above records are only embodiments of the present invention. Any modification or change made by a person familiar with the present technology using the present invention shall fall within the patent scope claimed by the present invention and shall not be limited to those disclosed in the embodiments.

Claims

1. A fluid driven centrifuge, characterized in that: The invention comprises a separation device and a fluid power device driving the separation device, wherein the fluid power device comprises: The separation device comprises a separation cover and a rotating impeller arranged in the separation cover, the fluid power device is connected to the rotating impeller through a transmission mechanism, or the rotating impeller is integrally formed / fixedly connected to the outer ring of the fluid power device; An outer ring, whose inner ring surface is provided with a plurality of driving recesses in the circumferential direction; A core body is coaxially arranged in the outer ring and can rotate relative to the outer ring, and the outer ring surface of the core body is provided with at least one nozzle, at least one discharge port, and at least one flushing channel located between the nozzle and the discharge port; at least one inlet channel connected to at least one nozzle; and at least one drainage channel communicating with at least one drainage port; At least one inlet channel, at least one nozzle, at least two driving recesses, at least one primary flushing channel, at least one outlet and at least one discharge channel form an independent working unit, and the fluid power device includes at least one independent working unit; The core includes The inlet channel has a nozzle formed on the peripheral surface of the core body, and its direction is an arc line extending from the middle to the outside. The nozzle is connected with the driving concave portion corresponding to the outer ring to form a first-stage flow channel; The secondary flow channel is an arc line extending from the edge of the core body inward and then bending to the edge. Each secondary flow channel is connected with the front and rear driving recesses corresponding to the outer ring, forming N-step flow channels along the circumference of the core body, where N is a natural number ≥ 2; Each step of the flow channel cooperates with the corresponding driving recess of the outer ring to form a multi-step stroke structure with decreasing fluid energy; The fluid enters from the inlet channel, is ejected step by step through the nozzle of the core body and the secondary flow channel, and acts on at least two driving recesses on the circumference of the outer ring, generating thrust for these driving recesses to drive the outer ring to rotate and do work, thereby realizing power output. Finally, the fluid is discharged through the discharge port of the core body via the discharge channel.

2. The fluid driven centrifuge according to claim 1, characterized in that: The inlet channel and the outlet channel are formed in the core body. The nozzle and the secondary flow channel on the core body are connected with the driving recess corresponding to the outer ring. The secondary flow channel is arranged along the circumference of the core body or the outer ring.

3. The fluid driven centrifuge according to claim 2, characterized in that: The direction of the core inlet channel is a logarithmic spiral extending from the middle to the outside, the pole of the logarithmic spiral is set on the central axis of the core, and the direction angle of the logarithmic spiral is 15°-45°.

4. The fluid driven centrifuge according to claim 1, characterized in that: The fluid power device also includes a shaft, on which the outer ring is coaxially arranged with the core body, and on which inlet and outlet flow channels are opened, which are respectively connected to the inlet channel and the outlet channel of the core body.

5. The fluid driven centrifuge according to claim 1, characterized in that: The fluid power device comprises more than two independent working units to form a multi-stage driving structure, and the units are arranged along the circumference of the core or the outer ring.

6. The fluid driven centrifuge according to any one of claims 1 to 5, characterized in that: More than two driving recesses are arranged on the inner ring surface of the outer ring, each driving recess has a contour bottom surface and a driving surface, the contour line of the contour bottom surface is a logarithmic spiral line, and its pole is arranged at the center of the core body.

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