A hydraulic power device

Abstract

The present invention discloses a hydraulic power device, comprising an outer ring and a core body, wherein at least one-step secondary flow channel is arranged between the nozzle and the discharge port on the outer ring surface of the core body, liquid enters from the liquid inlet channel, is ejected step by step through the nozzle of the core body and the secondary flow channel, acts on at least two driving recesses on the circumference of the outer ring, generates thrust on these driving recesses, drives the outer ring to rotate and do work, realizes power output, and finally, the liquid is discharged through the discharge port of the core body via the liquid discharge channel.

Description

Technical Field

[0001] The invention discloses a hydraulic power device, which belongs to the technical field of mechanical devices for generating power according to the International Patent Classification (IPC). Background Art

[0002] 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.

[0003] Chinese document CN206942914U discloses a hydraulic energy conversion device, which is an invention of the hydraulic energy conversion device previously proposed by the inventor of this case. The liquid acts on the groove surface of the outer ring through the direct-drive power movement, generating thrust to drive the rotating outer ring, thereby achieving continuous output of speed and torque. It has the advantages of simple structure, flexible transmission, high efficiency, and strong reliability.

[0004] In order to further improve the performance and simplify the structure and realize a compact, efficient and reliable energy conversion device, the present invention is proposed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a hydraulic power device. Through the multi-stage flow channels circumferentially arranged on the core body, the pressure of the liquid can be used multiple times, and the core body drives the rotating outer ring to achieve power output. The device has the advantages of compact structure, large torque, high speed, high transmission efficiency, energy saving and environmental protection.

[0006] To achieve the above object, the present invention is implemented by the following technical solutions:

[0007] A hydraulic power device, comprising:

[0008] An outer ring, whose inner ring surface is provided with a plurality of driving recesses in the circumferential direction;

[0009] 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;

[0010] at least one liquid inlet channel connected to at least one nozzle; and

[0011] at least one liquid discharge channel connected to at least one discharge port;

[0012] The liquid enters from the liquid inlet channel, is ejected step by step through the nozzle of the core body and the secondary flushing 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 liquid is discharged through the discharge port of the core body via the liquid discharge channel.

[0013] Furthermore, at least one liquid inlet channel, at least one nozzle, at least two driving recesses, at least one primary flushing channel, at least one discharge port and at least one liquid discharge channel form an independent working unit, and the hydraulic power device includes at least one independent working unit.

[0014] 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.

[0015] Furthermore, a liquid inlet channel and a liquid discharge channel are formed in the core.

[0016] Furthermore, the core includes:

[0017] The liquid 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;

[0018] 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;

[0019] Each step of the flow channel cooperates with the corresponding driving recess of the outer ring to form a multi-step stroke structure in which the liquid pressure can be gradually reduced.

[0020] 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.

[0021] Furthermore, the direction of the liquid inlet channel of the core 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°.

[0022] Furthermore, a liquid inlet channel is provided on the core body, and its direction is a logarithmic spiral extending from the middle to the outside. The direction of the stroke channel of the secondary flow channel is a logarithmic spiral, and 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 liquid inlet channel.

[0023] Furthermore, the hydraulic power device also includes a shaft, and the outer ring and the core body are coaxially arranged on the shaft.

[0024] Furthermore, the hydraulic 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 channels which are respectively connected to the inlet channel and the outlet channel of the core body.

[0025] The liquid inlet and outlet shaft channels in the shaft form a liquid inlet and a liquid outlet, and the liquid inlet and outlet shaft channels are non-connected structures.

[0026] 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.

[0027] Furthermore, the liquid inlet channel, the nozzle, the driving recess, the secondary flow channel, the discharge port and the liquid discharge channel in the independent working unit constitute a liquid flow path.

[0028] Furthermore, the hydraulic power device includes more than two independent working units to form a multi-stage drive structure, and is arranged along the circumference of the core body or the outer ring.

[0029] 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.

[0030] A hydraulic motor comprises the above-mentioned hydraulic power device.

[0031] A hydraulic engine comprises the above-mentioned hydraulic power device.

[0032] A continuously variable transmission comprises the hydraulic power device.

[0033] The hydraulic power device of the present invention has a simple structure, large torque, high speed, high transmission efficiency, and low energy consumption, and can be widely used in vehicles, power generation equipment, and other fields requiring power output devices. The present invention has the following beneficial effects:

[0034] 1. The core body of the present invention is provided with a multi-stage flow channel, i.e., the liquid 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 liquid acts on the driving recess of the outer ring from the first-stage flow channel, the driving recess is connected to the second-stage flow channel, and then returns to the second-stage flow channel and acts on another driving recess of the outer ring, and so on, until the liquid 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 utilization rate of liquid pressure energy, and the output torque further increases with the increase of rotation speed.

[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 flow channels or passages are arranged on the circumference of the core, the lower the overall weight is, which further improves the output speed and efficiency of the device.

[0036] 3. The present invention directly utilizes liquid to enter the core at high speed and drives the outer ring to rotate, and converts the liquid pressure energy into kinetic energy. Compared with the existing engines or motors, it does not cause environmental air pollution and has the advantages of environmental protection and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the first embodiment of the present invention.

[0038] Figure 2 It is a side view along axis A of the first embodiment of the present invention.

[0039] Figure 3 It is a side view along axis B of the first embodiment of the present invention.

[0040] Figure 4 It is a cross-sectional view of the first embodiment of the present invention.

[0041] Figure 5 This is another layout diagram of the first embodiment of the present invention.

[0042] Figure 6 It is a schematic diagram of the second embodiment of the present invention.

[0043] Figure 7 It is a side view along axis C of the second embodiment of the present invention.

[0044] Figure 8 It is a side view along axis D of the second embodiment of the present invention.

[0045] Fig. 9 It is a radial cross-sectional view of the second embodiment of the present invention. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings:

[0047] Example 1: Please refer to Figures 1 to 4 A hydraulic power device comprises an outer ring 1, whose inner ring surface is provided with a plurality of driving recesses 11 in the circumferential direction; 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 discharge port 302, and at least one flushing channel 300 located between the nozzle and the discharge port;

[0048] At least one liquid inlet channel 31 connected to at least one nozzle 301; and

[0049] at least one drainage channel 310 communicating with at least one drainage port 302;

[0050] The liquid enters from the liquid inlet channel 31, and is ejected step by step through the nozzle 301 of the core body 3 and the secondary flushing 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, and the liquid is discharged through the discharge port of the core body 3 through the liquid discharge channel, realizing continuous power output, which can be used as a hydraulic motor or hydraulic engine or continuously variable transmission. The hydraulic power device also includes a shaft 2, and the outer ring 1 and the core body 3 are coaxially arranged on the shaft 2.

[0051] like Figure 4 As shown, the liquid inlet channel 31 and the liquid discharge channel 310 are formed in the core body 3, and the nozzle 301 and the secondary flushing channel 300 on the core body 3 are connected with the driving recess 11 corresponding to the outer ring 1, wherein the secondary flushing channel 300 and the corresponding driving recess 11 are arranged alternately and connected in sequence, and the secondary flushing channel 300 is arranged along the circumference of the core body or the outer ring.

[0052] like Figure 4 The core 3 includes: a liquid 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;

[0053] 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 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 channel, it includes the 1st-stage channel (liquid inlet channel) and the 2nd-stage channel (primary flushing channel); if it is a 3-stage channel, it includes the 1st-stage channel (liquid inlet channel), the 2nd-stage channel (primary flushing channel), the 3rd-stage channel (another secondary flushing channel), ...

[0054] 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 liquid pressure energy.

[0055] The hydraulic power device can be designed according to the load requirements, in which the core 3 can be set with 2-stage flow channels, 3-stage flow channels, or more stages of liquid inlet flow channels. Each stage cycle does work, fully utilizes energy, and maximizes the use efficiency to meet the output torque and speed requirements.

[0056] like Figure 5 Schematic diagram of a 4-step flow channel. After the compressed liquid enters from the 1st step flow channel 311, it passes through the 2nd, 3rd, and 4th step flow channels 312, 313, and 314, and is ejected to act on the corresponding driving recess 11, and finally the liquid is discharged through the discharge channel 310; Figure 4 This is a schematic diagram of the 5-stage liquid inlet flow channel. The working process is the same as Figure 5 The schematic is similar. Figure 5 The secondary flow channel 300 includes a return channel and a connected stroke channel, such as Figure 5 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.

[0057] See also Figure 1 The hydraulic power device also includes a shaft 2, and the outer ring 1 is coaxially arranged on the shaft 2 with the core 3. The shaft 2 is provided with inlet and outlet channels 21 and 210 respectively connected to the inlet channel 31 and the discharge channel 310 of the core 3. The inlet and outlet channels in the shaft form an inlet and an outlet, and the inlet and outlet channels are non-connected structures. The outer ring 1 is matched with the shaft 2 through the side plates 41 and 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 liquid is discharged from the discharge channel or the flow channel.

[0058] See also Figure 1 In the present invention, the core body 3 can be formed by the cooperation of a left core body and a right core body, and the cooperation surfaces of the left core body and the right core body are provided with a liquid inlet channel 31 and a liquid discharge channel 310. The core body 3 can also be integrally cast.

[0059] See also Figure 1 , Figure 4 This embodiment is a primary drive structure. A liquid channel is arranged circumferentially on the core 3 to form a primary drive structure. The liquid 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 flushing channel 300, a discharge port 302 and a liquid discharge channel 310 on the core 3 and the outer ring 1 form an independent working unit. The hydraulic power device includes at least one independent working unit. The inlet channel 31, the nozzle 301, the driving recess 11, the secondary flushing channel 300, the discharge port 302 and the liquid discharge channel 310 in the independent working unit constitute a liquid flow path.

[0060] See also Figure 1 , Figure 4 or Figure 5 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 liquid entering the previous step flow channel is discharged by the next step flow channel.

[0061] In the present invention, the direction of the liquid inlet channel of the core body 3, namely the first-stage flow channel, can be a common arc line or a spiral line, and the direction of each secondary flow channel, namely the stroke channel in the N-th-stage flow channel, can also be a common arc line or a spiral line.

[0062] like Figure 4 and Figure 5 The core body 3 of the present invention is provided with a liquid inlet channel 31, which runs in a logarithmic spiral extending from the middle to the outside. The stroke path of the secondary flushing channel 300 runs in a logarithmic spiral, and the logarithmic spiral of the stroke path of the secondary flushing channel runs in a direction substantially the same as the logarithmic spiral of the liquid inlet channel. The liquid 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.

[0063] See also Figure 1 , Figure 2 and Figure 3 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.

[0064] The hydraulic power device involved in this application refers to a device that can convert hydraulic 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 that provide external protection, or a coupling that provides 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 liquid used in the power device is usually a Newtonian fluid or a non-Newtonian fluid, and Newtonian fluid is usually selected, including liquid fluid. The liquid pressure input to the power device can be generated by a compressor (such as a hydraulic pump), generated by a container of compressed fluid, or derived from the environment (such as water flow), etc.

[0065] Figure 1 and Figure 4 It should be noted that the liquid inlet channel 31 and the liquid discharge channel 310 of the core body and the liquid inlet shaft channel 21 and the liquid outlet shaft channel 210 do not correspond to each other according to the drawing rules, but for the sake of illustration, Figure 1The liquid inlet channel and the liquid discharge channel of the core body refer to the liquid inlet channel and the liquid discharge channel. Figure 6 and Fig. 9 A similar schematic diagram is shown here.

[0066] A hydraulic motor, a hydraulic engine or a continuously variable transmission comprises the above-mentioned hydraulic power device.

[0067] Example 2: Please refer to Figures 6 to 9 The hydraulic power device includes two independent working units to form a two-stage driving structure, that is, two liquid channels are arranged circumferentially on the core body 3, each liquid channel includes a liquid inlet channel 31 of more than one order and a secondary flushing channel 300 and a liquid discharge channel arranged circumferentially along the core body 3. The hydraulic power device comprises an outer ring 1, on which a plurality of driving recesses 11 are arranged on the circumference of the inner ring surface; 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, outlets, and at least one flushing channel between each group of nozzles and outlets; the core body is provided with two liquid inlet channels 31, 32, which correspond to the connected nozzles; and two liquid discharge channels 310, 320, which correspond to the connected outlets; two streams of liquid enter from the two liquid inlet channels of the core body respectively, and are ejected step by step through the nozzles of the core body 3 and the secondary flushing 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 work, realizing power output, and finally, the liquid is discharged through the outlet of the core body through the liquid discharge channel, which can be used as a hydraulic motor or hydraulic engine or continuously variable transmission. The above-mentioned one liquid inlet channel, one nozzle, a corresponding number of driving recesses and corresponding secondary flushing channels, outlets and one liquid discharge channel form an independent working unit.

[0068] The hydraulic 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 liquid inlet shaft channels 21, 22 and liquid outlet shaft channels 210, 220, which are respectively connected to the liquid inlet channels 31, 32 and liquid discharge channels 310, 320 of the core. The shaft 2 is provided with two liquid inlets and two liquid outlets corresponding to the liquid channels; the liquid at a high speed and a certain pressure enters from the two liquid inlets of the shaft 2, and is ejected through the liquid 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 liquid returns to the corresponding liquid outlet through the liquid 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.

[0069] A hydraulic motor, a hydraulic engine or a continuously variable transmission comprises the above-mentioned hydraulic power device.

[0070] Embodiment 3: The hydraulic power device of the present invention includes 4 or more independent working units to form a multi-stage drive structure. Three or more liquid channels are arranged circumferentially on the core body. Each liquid channel includes more than one level of liquid inlet channels and secondary flow channels and liquid discharge channels arranged circumferentially along the core body. The liquid inlet channel and liquid discharge channel are arranged on the mating surfaces of the left and right core bodies. The shaft is provided with a corresponding number of liquid inlet channels and liquid discharge channels. The liquid enters from the liquid inlet channel of the shaft, and is ejected through the liquid 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, realizing continuous power output. Finally, the compressed liquid returns to the corresponding liquid discharge channel through each liquid discharge channel of the core body. It can be used as a hydraulic motor or hydraulic engine or continuously variable transmission. The other structures are the same as those in Embodiment 1.

[0071] A hydraulic motor, a hydraulic engine or a continuously variable transmission comprises the above-mentioned hydraulic power device.

[0072] Embodiment 4:

[0073] Hydraulic power unit prototype:

[0074] (I) Second-stage hydraulic power unit

[0075] 1. The main parameters are as follows:

[0076] (1) Liquid pressure: 18 MPa;

[0077] (2) Maximum speed: 1000r / min;

[0078] (3) Number of driving structure levels: 3;

[0079] (4) Liquid inlet channel diameter: Φ5mm;

[0080] (5) Single-stage drive liquid inlet stage number: 2;

[0081] (6) Outer ring diameter: Φ140mm;

[0082] (7) Outer ring weight: 12.5KG

[0083] 2. Output torque

[0084]

[0085] (II) Fifth-order hydraulic power unit

[0086] 1. The main parameters are as follows:

[0087] (1) Liquid pressure: 18 MPa;

[0088] (2) Maximum speed: 2000r / min;

[0089] (3) Number of driving structure levels: 3;

[0090] (4) Liquid inlet channel diameter: Φ5mm;

[0091] (5) Single-stage drive liquid inlet stage number: 5;

[0092] (6) Outer ring diameter: Φ140mm;

[0093] (7) Outer ring weight: 12.5KG

[0094] 2. Output torque

[0095]

[0096] It can be seen from the test that under the same conditions, increasing the number of drive fluid inlet stages can significantly increase the output torque and improve the acceleration performance. At the same time, it is also beneficial to increase the speed.

[0097] 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 hydraulic power device, characterized in that: include: 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 liquid inlet channel connected to at least one nozzle; and at least one liquid discharge channel connected to at least one discharge port; 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; A liquid inlet channel and a liquid discharge channel are formed in the core; The core includes The liquid 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 concave portion of the outer ring to form a multi-step stroke structure with decreasing hydraulic energy; The direction of the core body liquid 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 body, and the logarithmic spiral direction angle is 15°-45°; The liquid enters from the liquid inlet channel, is ejected step by step through the nozzle of the core body and the secondary flushing 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 liquid is discharged through the discharge port of the core body via the liquid discharge channel.

2. The hydraulic power device according to claim 1, characterized in that: At least one liquid inlet channel, at least one nozzle, at least two driving recesses, at least one primary flushing channel, at least one discharge port and at least one liquid discharge channel form an independent working unit. The hydraulic power device includes at least one independent working unit.

3. The hydraulic power device according to claim 1, characterized in that: The nozzle and the secondary flow channel on the core body are connected with the driving recess corresponding to the outer ring, and the secondary flow channel is arranged along the circumference of the core body or the outer ring.

4. The hydraulic power device according to claim 1, characterized in that: The core body is provided with a liquid inlet channel, the direction of which is a logarithmic spiral extending from the middle to the outside, and 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 liquid inlet channel.

5. The hydraulic power device according to claim 1, characterized in that: The hydraulic power device also includes a shaft, and the outer ring and the core body are coaxially arranged on the shaft.

6. The hydraulic power device according to claim 1, characterized in that: The hydraulic power device also includes a shaft, on which the outer ring is coaxially arranged with the core body, and on which a liquid inlet and a liquid outlet shaft are opened, which are respectively connected to a liquid inlet channel and a liquid discharge channel of the core body.

7. The hydraulic power device according to claim 6, characterized in that: The liquid inlet and outlet shaft channels in the shaft form a liquid inlet and a liquid outlet, and the liquid inlet and outlet shaft channels are non-connected structures.

8. The hydraulic power device according to claim 5, characterized in that: 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.

9. The hydraulic power device according to claim 2, characterized in that: The liquid inlet channel, the nozzle, the driving recess, the secondary flow channel, the discharge port and the liquid discharge channel in the independent working unit constitute a liquid flow path.

10. The hydraulic power device according to claim 2, characterized in that: The hydraulic 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 body or the outer ring.

11. The hydraulic power device according to claim 1, 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.

12. A hydraulic motor, characterized in that: A hydraulic power device comprising any one of claims 1 to 11.

13. A hydraulic engine, characterized in that: A hydraulic power device comprising any one of claims 1 to 11.

14. A continuously variable transmission, characterized in that: A hydraulic power device comprising any one of claims 1 to 11.

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