TWI581546B - Rotor assembly and fluid electricity generation device - Google Patents

Description

Rotor assembly and fluid power generation device

The present invention relates to a power generating device, and more particularly to a rotor assembly and a fluid power generating device.

Conventional fluid power generation devices mostly drive the blades to rotate and then generate energy. For example, conventional wind power generators provide large blades to increase the area of contact with wind, but even so, conventional wind power plants can only be used at wind speeds. When it is larger than 3 m/s, the blades are rotated by the wind. In view of this, how to drive a fluid power generation device with a smaller fluid force to generate power using various fluid forces has become one of the subjects of the art.

Therefore, the present inventors have felt that the above-mentioned deficiencies can be improved, and they have devoted themselves to research and cooperated with the application of the theory, and finally proposed a present invention which is reasonable in design and effective in improving the above-mentioned defects.

Embodiments of the present invention provide a rotor assembly and a fluid power generation device that can effectively improve the possible loss of a conventional fluid power generation device.

The embodiment of the present invention provides a magnet adjustment module, which is adapted to be mounted in a receiving groove recessed in an outer edge of the rotating member, and the rotating member can be rotated about an axis, the magnet adjusting module The invention comprises: a magnetic unit comprising a frame and a magnet movably mounted on the frame; and an elastic recovery unit mounted on the frame of the magnetic unit, and the elastic recovery unit is capable of being stressed on the magnet Deformation occurs when displacement, and the elastic recovery unit that produces deformation has a tendency to make the magnet back a restoring force to a position before the displacement; wherein, when the frame of the magnet adjusting module is installed in the receiving groove of the rotating member, the magnet can be driven by a centrifugal force generated by the rotating member, and relative to the The accommodating groove moves from a first position toward a second position in a direction away from the axis, and causes the elastic recovery unit to deform and has a tendency to drive the magnet to return to the first position of the restoring force; wherein The magnet in the second position does not protrude from the receiving groove of the rotating member.

The embodiment of the present invention further provides a rotor assembly, comprising: a rotating member, comprising a cylinder and a spiral blade connected to the outer edge of the column, and the outer edge of the spiral blade is recessed with at least one receiving groove And the rotating member is rotatable about an axis by a driving force applied by a fluid, a center line of the cylinder overlapping the axis; and at least one magnet adjusting module located at the rotating member The magnet adjustment module includes: a magnetic unit including a frame and a magnet movably mounted to the frame, the frame being mounted in the receiving groove of the rotating member; and an elastic a recovery unit, which is mounted on the frame of the magnetic unit, and the magnet can be driven by a centrifugal force generated by the rotation of the rotating member, and opposite to the receiving slot from a first position away from the axis toward a second Positioning and causing the elastic recovery unit to deform and having a tendency to urge the magnet to return to the restoring force of the first position; wherein the magnet located in the second position does not protrude from the rotation Accommodating groove.

The embodiment of the invention further provides a fluid power generation device, comprising: a certain subassembly, comprising: a casing surrounding a flow passage defined by the casing, wherein the casing defines an axis passing through the flow passage; and at least one coil unit Provided on the housing, and a center line of the coil unit is perpendicular to the axis; and a rotor assembly rotatably disposed in the flow passage of the housing, and the rotor assembly includes: a rotation The workpiece includes a cylinder and a spiral blade connected to the outer edge of the cylinder, a center line of the cylinder overlaps the axis, and the outer edge of the spiral blade is recessed with at least one receiving groove. The rotating member is rotatable about the axis by a driving force applied by a fluid; and at least one magnet adjusting module is mounted to the rotating The magnet adjustment module includes: a magnetic unit including a magnet, and the magnet defines a moving path; when the magnet is located at a predetermined position on the moving path, the magnet along the magnet a radial direction of the axis is opposite to the coil unit; and an elastic recovery unit mounted to the magnetic unit, and the magnet can be driven by a centrifugal force generated by the rotation of the rotating member, relative to the rotating member Moving from a first position toward a second position in a direction away from the axis, and causing the elastic recovery unit to deform and having a tendency to urge the magnet to return to the restoring force of the first position; wherein, when the magnet is located at the first position a position between the rotor assembly and the housing to generate a first resistance that hinders rotation of the rotor assembly; when the magnet is in the second position, the magnet does not protrude from the receiving groove of the rotating member, and A second resistance between the rotor assembly and the housing that hinders rotation of the rotor assembly is generated, and the first resistance is less than the second resistance.

In summary, the magnet adjustment module, the rotor assembly, and the fluid power generation device provided by the embodiments of the present invention are designed such that the magnet can be driven by the centrifugal force to move, so that the rotating member is stationary without power generation requirements. In the state, the magnet is located away from the stator assembly (ie, at the bottom of the groove of the accommodating groove), thereby reducing the resistance between the magnet and the stator assembly, thereby effectively reducing the driving force required to drive the rotating rotating member to facilitate the driving force. The fluid power generation device of the present embodiment is applied to a place or a situation where the flow velocity (e.g., wind speed) is low. When the rotating member is in a rotating state, it needs to be in a condition for facilitating power generation, so that the magnet is located adjacent to the stator assembly, so that the magnet and the corresponding coil unit can generate an induced current.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

100‧‧‧Fluid power generation unit

1‧‧‧stator assembly

11‧‧‧Shell

111‧‧‧Flow pipe

112‧‧‧ side cover

113‧‧‧Flow channel

12‧‧‧ coil unit

121‧‧‧ core

122‧‧‧ coil

2‧‧‧Rotor assembly

21‧‧‧Rotating parts

211‧‧‧Cylinder

212‧‧‧Spiral blades

2121‧‧‧ accommodating slots

22‧‧‧Magnetic adjustment module

221‧‧‧Magnetic unit

2210‧‧‧Frame

2211‧‧‧Fixed frame

2211a‧‧‧Tube

2211b‧‧‧Flanking

2212‧‧‧ Activity framework

2212a‧‧‧Tube

2212b‧‧‧Flanking

2213‧‧‧ Magnet

222‧‧‧Flexible response unit

X‧‧‧ axis

R‧‧‧ radial direction

C‧‧‧ center line

P‧‧‧pitch

G‧‧‧ gap

200‧‧‧Car

1 is a schematic perspective view of a fluid power generation device of the present invention.

Figure 2 is a partial cross-sectional view of Figure 1.

3 is a partial cross-sectional view showing another embodiment of FIG. 1.

4 is a partial enlarged view of the stator assembly of FIG. 3.

Fig. 5 is a perspective view (1) of a rotor assembly of a fluid power generating device of the present invention.

Figure 6 is a perspective view (2) of the rotor assembly of the fluid power generating device of the present invention.

Fig. 7 is a perspective view (3) of a rotor assembly of a fluid power generating device of the present invention.

FIG. 8 is a cross-sectional view showing the magnet adjusting module in the fluid power generating device of the present invention when the rotating member is not rotated.

FIG. 9 is a cross-sectional view showing the magnet adjusting module in the fluid power generating device of the present invention when the rotating member rotates.

Fig. 10 is a schematic view showing the application of the fluid power generating device of the present invention to an automobile.

Figure 11 is a bottom plan view of Figure 10.

Please refer to FIG. 1 to FIG. 11 , which are an embodiment of the present invention. It should be noted that the related embodiments refer to the related quantities and appearances of the drawings, and only the embodiments of the present invention are specifically described. In order to understand the contents thereof, it is not intended to limit the scope of the invention.

As shown in FIG. 1 , the present embodiment is a fluid power generation device 100 , especially a wind power generation device, but is not limited thereto. That is to say, the fluid power generating apparatus 100 of the present embodiment does not exclude driving in a manner other than wind power (for example, hydraulic power). Further, the fluid power generation device 100 is exemplified in the present embodiment as applied to the automobile 200 (see FIGS. 10 and 11), but the application range of the fluid power generation device 100 of the present invention is not limited thereto. The fluid power generating device 100 includes a stator assembly 1 and a rotor assembly 2 mounted in the stator assembly 1, and the rotor assembly 2 is rotatable relative to the stator assembly 1 to generate power to the fluid power generating device 100. The construction of the stator assembly 1 and the rotor assembly 2 will be described separately below, and then the correspondence between the stator assembly 1 and the rotor assembly 2 will be described.

Referring to FIG. 2, the stator assembly 1 includes a housing 1 and is disposed on A plurality of coil units 12 on the housing 1. The casing 1 includes a long flow tube 111 and side cover 112. Wherein, the flow tube 111 is a circular tube having a uniform inner diameter in the embodiment, and the flow tube 111 surrounds and defines a flow passage 113. Furthermore, the flow tube 111 defines an axis X passing through the flow channel 113, and the axis X is equivalent to the center line of the flow tube 111 in this embodiment, but is not limited thereto. The side covers 112 are respectively installed in opposite side portions of the flow tube 111 (such as the left side and the right side of the flow tube 111 in FIG. 2), and each side cover 112 is configured to allow a fluid (eg, wind) to flow in. And flowing out of the flow channel 113.

The coil units 12 are distributed on the flow tube 111 of the housing 1, and a center line C of each coil unit 12 is substantially perpendicular to the axis X defined by the flow tube 111. The number and density of the coil units 12 distributed in the casing 1 can be adjusted according to the needs of the designer, and are not limited herein. Wherein, the position of each coil unit 12 mounted on the flow tube 111 may be buried in the flow tube 111 (as shown in FIG. 2) or fixed on the inner surface of the flow tube 111 (as shown in FIG. 3 and FIG. 4, which is equivalent to The partial coil unit 12 is located in the flow channel 113).

Each of the coil units 12 includes a core portion 121 and a coil 122 wound around the core portion 121, and each of the coil units 12 is fixed to the flow tube 111 of the housing 1 through the core portion 121 thereof, and each of the coil units The center line C defined by 12 corresponds to the center line of the core portion 121 in this embodiment. Further, as shown in FIG. 2, the core portion 121 is located inside the flow tube 111, and the coil 122 is wound around the core portion 121 and placed inside the flow tube 111; or, as shown in FIGS. 3 and 4 The core portion 121 is fixed to the inner surface of the flow tube 111, and the coil 122 is wound around the core portion 121 and located in the flow passage 113.

Referring to FIG. 3 to FIG. 5, the rotor assembly 2 is rotatably disposed in the flow passage 113 of the housing 1, and the rotor assembly 2 includes a rotating member 21 that is rotatable about the axis X. And a plurality of magnet adjustment modules 22 mounted on the rotating member 21. The rotating member 21 includes a cylinder 211 and is connected to the cylinder 211. A spiral blade 212 of the outer edge, the two ends of the cylinder 211 are respectively pivoted at the center of the two side covers 112 of the casing 1, and the center line of the cylinder 211 overlaps with the axis X in the embodiment. The spiral blade 212 has a plurality of pitches P corresponding to the length on the axis X, and the outer edge of the spiral blade 212 is recessed in a radial direction R of the vertical axis X in each of the pitches P thereof. A receiving slot 2121 is received. That is, the designer can recess a single accommodating groove 2121 (as shown in FIG. 5) or a plurality of accommodating grooves 2121 (FIG. 6) in each pitch P of the spiral blade 212 according to the requirement. This is not limited.

In addition, the rotating member 21 shown in FIG. 5 and FIG. 6 is exemplified by the formation of a single spiral blade 212 on the cylinder 211, but the embodiment can be adjusted and changed as needed. For example, as shown in FIG. 7, the rotating member 21 of the present embodiment may be formed with a plurality of spiral blades 212 on its cylinder 211, and each of the spiral blades 212 may be in a specific position as required by the designer. A receiving groove 2121 is formed. Furthermore, although the rotating member 21 is exemplified by the provision of the spiral blade 212, it is not excluded that the rotating member 21 is replaced with a non-helical blade like a fan blade (not shown).

The number of the magnet adjustment modules 22 is substantially equal to the number of the accommodating slots 2121 formed by the recesses 21, and the magnet adjustment modules 22 are respectively mounted on the accommodating slots 2121. Since the configurations of each of the magnet adjustment modules 22 are substantially the same, for the convenience of description, only the configuration of the single magnet adjustment module 22 will be described below in the present embodiment.

As shown in FIG. 8 and FIG. 9 , the magnet adjustment module 22 includes a magnetic unit 221 and an elastic recovery unit 222 mounted on the magnetic unit 221 . The elastic recovery unit 222 is exemplified by a compression spring in this embodiment, but other components are not excluded. For example: tensile springs or foams and other resilient components.

The magnetic unit 221 includes a frame 2210 and a permanent magnet 2213 movably mounted to the frame 2210. And the frame 2210 of the embodiment includes A fixed frame 2211 and a movable frame 2212 each have a tubular portion 2211a, 2212a and a side wing portion 2211b, 2212b extending perpendicularly outward from an end edge of the tubular portion 2211a, 2212a. The fixing frame 2211 is fixed at the top of the accommodating groove 2121 by the flank portion 2211b thereof, and has a gap G between the outer surface of the tubular portion 2211a and the side wall of the accommodating groove 2121. The magnet 2213 is mounted on the inner side of the tubular portion 2212a of the movable frame 2212, and the tubular portion 2212a of the movable frame 2212 is movably disposed in the tubular portion 2211a of the fixed frame 2211, and the side flap portion 2212b of the movable frame 2212 is adjacently disposed. The groove of the groove 2121 is accommodated. Thereby, through the above arrangement, the movable frame 2212 has only one degree of freedom corresponding to the fixed frame 2211.

Furthermore, the elastic recovery unit 222 is disposed on the gap G formed between the outer surface of the tubular portion 2211a of the fixed frame 2211 and the side wall of the receiving groove 2121, and the opposite ends of the elastic recovery unit 222 (such as the elastic recovery in FIG. 8) The top end and the bottom end of the unit 222 abut against the side wing portion 2211b of the fixed frame 2211 and the side wing portion 2212b of the movable frame 2212, respectively, so that the elastic recovery unit 222 can deform when the magnet 2213 is subjected to a force (such as the following centrifugal force). The deformation-generating elastic returning unit 222 tends to return the magnet 2213 (or the movable frame 2212) to the position before the displacement, so that the movable frame 2212 can reciprocally move relative to the fixed frame 2211 by the centrifugal force and the elastic returning unit 222.

It is to be noted that the magnet adjustment module 22 of the present invention mainly provides a design for reciprocating the magnet 2213 relative to the accommodating groove 2121 through the elastic recovery unit 222. That is, the embodiment is based on the above-described fixed frame 2211 and The cooperation framework 2212 is achieved, but it is not excluded to be implemented by other means. Therefore, the frame 2210 can be changed or omitted in order to achieve the purpose of reciprocating the magnet 2213 with respect to the accommodating groove 2121 through the elastic recovery unit 222. In addition, the magnet adjusting module 22 of the present invention is not excluded from being directly mounted on the rotating member 21 on which the receiving groove 2121 is not formed.

The above is the configuration of the stator assembly 1 and the rotor assembly 2 of the present embodiment. The following describes the operational flow between the stator assembly 1 and the rotor assembly 2 and the corresponding relationship between them. Moreover, since the operation modes of each of the magnet adjustment modules 22 are substantially the same, for the convenience of description, only the operation mode of the single magnet adjustment module 22 will be described in the following.

Referring to FIG. 8 , when the rotating member 21 is stationary, the magnet 2213 and the movable frame 2212 are all located on the bottom of the receiving groove 2121 . At this time, the magnet 2213 is opposite to the rotating member 21 (or its receiving groove 2121 ). The position is defined as a first position (as shown in Figure 8).

When a fluid (such as a wind) outside the fluid power generation device 100 enters the flow passage 113 of the casing 1 to apply a driving force to the spiral blade 212 of the rotating member 21, the rotating member 21 will be centered on the axis X. Rotating, and the magnet 2213 is driven by a centrifugal force generated by the rotation of the rotating member 21, and moves relative to the rotating member 21 from the first position in a direction away from the axis X toward a second position (as shown in FIG. 9), and The resilient return unit 222 deforms to store a restoring force to tend to urge the magnet 2213 back to the first position. The second position where the magnet 2213 is located is away from the bottom of the groove of the accommodating groove 2121 but does not protrude from the edge of the rotating member 21 (ie, the notch of the accommodating groove 2121). Moreover, when the magnet 2213 of the embodiment moves, the tubular portion 2212a of the movable frame 2212 is guided through the tubular portion 2211a of the fixed frame 2211, so that the magnet 2213 in the tubular portion 2212a of the movable frame 2212 can be opposite to the receiving groove. 2121 is a linear motion.

Therefore, when the rotating member 21 continues to rotate, the magnet 2213 and the movable frame 2212 are both maintained at the second position, that is, the magnet 2213 and the inner edge of the flow tube 111 of the housing 1 are kept at the closest distance to each other. By making the magnet 2213 at a predetermined position on its moving path, it can face the coil unit 12 in the radial direction R (as shown in FIG. 9, when the magnet 2213 is at a predetermined position, the center line C of the coil unit 12 passes through the above magnet. 2213), in turn, the effect of power generation is achieved by the induced current generated between the magnet 2213 and the coil 122.

That is, the positions of the casing 1 corresponding to the moving path of each of the magnets 2213 may be provided with N coil units 12, so that each of the magnets 2213 can be respectively associated with the above N in the process of rotating one turn with the rotating member 21. The coil unit 12 generates an induced current, which can be adjusted by adjusting the value of N to achieve the purpose of controlling the amount of power generated. More specifically, when the fluid power generating apparatus 100 of the present embodiment is provided with M magnet adjusting modules 22 on the rotating member 21, N housing units may be provided at positions corresponding to the moving path of each of the magnets 2213. 12; When the rotating member 21 rotates once, the N x M coil units 12 can be subjected to power generation operation, which is significantly improved compared to the conventional fluid power generating device.

If the fluid outside the fluid power generation device 100 (eg, wind) no longer enters the flow passage 113 of the housing 1, the rotating member 21 will gradually slow down its rotational speed until it is stationary, at which time the centrifugal force is less than the restoring force. The elastic recovery unit 222 will gradually release its restoring force to push against the side wing portion 2211b of the fixed frame 2211 and the side wing portion 2212b of the movable frame 2212, thereby driving the magnet 2213 fixed to the movable frame 2212 to move from the second position to First position.

It should be particularly noted that the driving force required to drive the stationary rotating member 21 to rotate is larger than the driving force required for the rotating rotating member 21, and thus how to reduce the driving force required for the stationary rotating member 21, That is, the magnet adjustment module 22 of the present embodiment is designed to move the magnet 2213 by centrifugal force, and the related description is as follows: When the magnet 2213 is in the first position (as shown in FIG. 8), a first resistance between the rotor assembly 2 and the stator assembly 1 hinders the rotation of the rotor assembly 2; when the magnet 2213 is in the second position (as shown in the figure) 9) A second resistance between the rotor assembly 2 and the stator assembly 1 that hinders the rotation of the rotor assembly 2 is generated. As the distance between the magnet 2213 and the stator assembly 1 is closer, the greater the resistance to the rotation of the rotor assembly 2 is generated; wherein the magnet 2213 is closer to the stator assembly 1 than to the second position, and the magnet 2213 Relative to the distance of the stator assembly 1 from its first position, Therefore, the above second resistance will be greater than the first resistance.

Further, when the rotating member 21 assumes a stationary state, there is no case of power generation, so the magnet 2213 does not need to approach the coil unit 12. Therefore, the passing magnet 2213 is located at a first position away from the stator assembly 1, thereby reducing the resistance between the magnet 2213 and the stator assembly 1, thereby effectively reducing the driving force required to drive the stationary rotating member 21 to rotate, thereby facilitating the embodiment. The fluid power generation device 100 is applied to a place or a situation where the flow velocity (e.g., wind speed) is low.

Further, when the rotating member 21 assumes a rotating state, it is required to be in a condition favorable for power generation, so the magnet 2213 needs to approach the coil unit 12. Therefore, the passing magnet 2213 is located adjacent to the second position of the stator assembly 1 so that the magnet 2213 and the corresponding coil unit 12 can generate an induced current.

Further, although the rotor assembly 2 and the magnet adjustment module 22 referred to in the present invention are applied to the fluid power generation device 100 as an example, the present invention is not limited to the fluid power generation device 100. That is to say, the rotor assembly 2 or the magnet adjustment module 22 can also be applied to a suitable place or device separately, which is not limited herein.

[Possible effects of the embodiments of the present invention]

In summary, in the fluid power generation device provided by the embodiment of the present invention, the rotor assembly is designed such that the magnet can be driven by the centrifugal force to move, so that the magnet is located away from the stator when the rotating member is stationary without power generation demand. The first position of the assembly is used to reduce the resistance between the magnet and the stator assembly, thereby effectively reducing the driving force required to drive the rotation of the stationary rotating member, so that the fluid power generating device of the embodiment is applied to the flow rate (eg, wind speed). Lower place or situation. When the rotating member is in a rotating state, it needs to be in a condition for facilitating power generation, so that the passing magnet is located at a second position adjacent to the stator assembly, so that the magnet and the corresponding coil unit can generate an induced current.

Furthermore, compared to the conventional wind power generation device, the fan-like blade is used for its wind power. The fluid power generation device of the present embodiment adopts a long casing and has a flow passage capable of utilizing a fluid flow rate, and the fluid power generation device is provided with a rotating member having a spiral blade in the flow passage. Therefore, the magnet adjustment module and the coil unit which are matched with each other can be increased in quantity according to the demand, so as to effectively increase the overall power generation amount.

In addition, in a preferred embodiment of the fluid power generating device of the present invention, a receiving groove is formed through the rotating member to match the magnet adjusting module provided with a frame (eg, a fixed frame and a movable frame), thereby making the magnet adjusting module It can smoothly reciprocate between the first position and the second position.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent variations and modifications of the scope of the invention are intended to be within the scope of the invention.

12‧‧‧ coil unit

212‧‧‧Spiral blades

2121‧‧‧ accommodating slots

22‧‧‧Magnetic adjustment module

221‧‧‧Magnetic unit

2210‧‧‧Frame

2211‧‧‧Fixed frame

2211a‧‧‧Tube

2211b‧‧‧Flanking

2212‧‧‧ Activity framework

2212a‧‧‧Tube

2212b‧‧‧Flanking

2213‧‧‧ Magnet

222‧‧‧Flexible response unit

C‧‧‧ center line

G‧‧‧ gap

Claims (8)

A rotor assembly includes: a rotating member including a cylinder and a spiral blade connected to the outer edge of the column, and the outer edge of the spiral blade is recessed with at least one receiving groove, and the rotating member can Rotating with a driving force of a fluid, the center line of the cylinder is overlapped with the axis; and at least one magnet adjusting module is located in the receiving groove of the rotating member, and The magnet adjustment module includes: a magnetic unit including a frame and a magnet movably mounted to the frame, the frame being mounted in the receiving groove of the rotating member; and an elastic recovery unit mounted on the a frame of the magnetic unit, and the magnet can be driven by a centrifugal force generated by the rotation of the rotating member, and moved relative to the receiving groove from a first position toward a second position away from the axis, and the The elastic recovery unit is deformed to have a recovery force that urges the magnet to return to the first position; wherein the magnet located in the second position does not protrude from the receiving groove of the rotating member. The rotor assembly of claim 1, wherein the outer edge of the spiral blade is recessed in a radial direction perpendicular to the axis to form the at least one receiving groove. The rotor assembly of claim 2, wherein the spiral blade has a plurality of pitches, and the spiral blade has the at least one receiving groove formed in each of the pitches, the magnet assembly included in the rotor assembly The number of modules is further limited to a plurality of modules, and the magnet adjustment modules are respectively installed in the accommodating slots. A fluid power generation device comprising: a sub-assembly comprising: a housing enclosing a flow passage defined therein, the housing defining an axis passing through the flow passage; and at least one coil unit disposed on the housing Body, and a centerline of the coil unit is perpendicular to the axis; a rotor assembly rotatably disposed in the flow passage of the housing, and the rotor assembly includes: a rotating member including a cylinder and a spiral blade connected to the outer edge of the cylinder, the cylinder a center line is overlapped with the axis, and the outer edge of the spiral blade is recessed with at least one receiving groove, and the rotating member can be rotated about the axis by a driving force applied by a fluid; and at least a magnet adjustment module is mounted in the receiving groove of the rotating member, and the magnet adjusting module comprises: a magnetic unit including a magnet, and the magnet defines a moving path; when the magnet is located in the movement a predetermined position on the path, the magnet facing the coil unit in a radial direction perpendicular to the axis; and an elastic recovery unit mounted to the magnetic unit, and the magnet is capable of being rotated by the rotating member Driving by a centrifugal force, moving relative to the rotating member from a first position away from the axis toward a second position, and causing the elastic recovery unit to deform and having a tendency to drive Recovering the magnet to the restoring force of the first position; wherein, when the magnet is in the first position, a first resistance between the rotor assembly and the stator assembly that hinders rotation of the rotor assembly is generated; when the magnet is located In the second position, the magnet does not protrude from the receiving groove of the rotating member, and a second resistance between the rotor assembly and the stator assembly that hinders rotation of the rotor assembly is generated, and the first resistance is smaller than the second resistance. The fluid power generating device of claim 4, wherein in the magnet adjusting module, the magnetic unit comprises a frame, and the frame is mounted in a receiving groove of the rotating member, and the magnet is movably mounted on the A frame, the elastic recovery unit is mounted to the frame. The fluid power generation device of claim 5, wherein in the magnet adjustment module, The frame includes a fixed frame and a movable frame fixed to the receiving groove of the rotating member, the movable frame is movably assembled to the fixed frame, and the movable frame has only one degree of freedom corresponding to the fixed frame The magnet is fixed to the movable frame, and the elastic recovery unit abuts against the fixed frame and the movable frame to enable the movable frame to reciprocate relative to the fixed frame. The fluid power generating device of claim 5, wherein the outer edge of the spiral blade is recessed in a radial direction perpendicular to the axis to form the at least one receiving groove. The fluid power generating device of claim 7, wherein the spiral blade has a plurality of pitches, and the spiral blade has the at least one receiving groove formed in each of the pitches, the magnet included in the rotor assembly The number of the adjustment modules is further limited to an array, and the magnet adjustment modules are respectively installed in the accommodating slots; the number of the coil units included in the stator assembly is further defined as an array, when each magnet is located in the moving path thereof In a predetermined position, the magnet faces at least one of the coil units in the radial direction.