TW201525276A - Fluid power generating apparatus - Google Patents

Abstract

A fluid power generating apparatus includes a loading seat, a power generating mechanism, a transmission mechanism and a generator. The power generating mechanism includes a primary shaft, a plurality of driving wheels and a fan. The driving wheels with the fan are connected to the primary shaft and simultaneously rotate. The transmission mechanism includes a driven shaft, a plurality of driven wheels and a hollow body. The rotating direction of the driven shaft and the hollow body is different. The generator includes a primary rotor and a secondary rotor. The primary rotor is connected to the driven shaft. The secondary rotor is connected to the hollow body.

Description

Fluid power generator

The present invention relates to a fluid power generation device, and more particularly to a fluid power generation device that uses a fluid such as wind or water to generate electricity.

In recent years, environmental problems and the depletion of fossil fuels have gradually attracted attention. One of the ways to solve the problem is how to use natural resources such as wind, water or solar energy. These natural resources are inexhaustible. Many of the advantages have gradually been valued by academics and industry. The wind power generation device is an impeller to withstand the wind, and the mechanical energy generated by the impeller is converted into an electric power output through the operation of the generator. The hydroelectric power generation device replaces the wind power with hydraulic power, and includes a power generator similarly to the wind power generation device.

The conventional wind power generation device mainly comprises a generator and an impeller; the generator has a rotating shaft, a rotor and a stator, the rotor is corresponding to the stator, and the impeller is fixed on the rotating shaft; when the impeller is blown by the wind, the impeller will The rotating shaft rotates together with the rotor, and the electric current is generated by the excitation of the stator and the rotor, thereby achieving the power generation effect.

However, in the actual use of the conventional power generating device, there are still the following disadvantages, since the generation of electric power is only caused by the rotation of the rotor by the impeller, and the power that can be generated is quite limited. In addition, when the specification of the impeller is amplified to a certain size, the wind speed for actuating the impeller must be increased. Therefore, the generator is often in standby due to insufficient wind speed. The above reasons will cause the power generation performance of the power generating device. Not at all.

An object of the present invention is to provide a fluid power generating device that uses a first driving wheel to drive a first driven wheel to rotate, and a second driving wheel to rotate the second driven wheel to achieve an increased power generation amount of the genset.

In order to achieve the above object, the present invention provides a fluid power generation device including a carrier, a power generating mechanism, a transmission mechanism, and a generator set; the power generating mechanism is mounted on the carrier, and the power generating mechanism includes a a main shaft, a first driving wheel, a second driving wheel and an impeller, wherein the impeller, the first driving wheel and the second driving wheel respectively sleeve the main shaft and rotate synchronously with each other; the transmission mechanism is mounted on the bearing seat Corresponding to the power generating mechanism, the transmission mechanism includes a first transmission component and a second transmission component, the first transmission component includes a driven shaft and a first driven wheel fixed to the driven shaft, The first driven wheel is driven to rotate by the first driving wheel, the second transmission component comprises a hollow cylinder sleeved with the driven shaft and a second driven wheel fixed to the hollow cylinder, the second driven wheel Rotating by the second driving wheel, and the rotating direction of the driven shaft is opposite to the rotating direction of the hollow cylinder; the generator set includes a main rotor and a pair of rotors corresponding to the main rotor The main rotor fixed to the shaft and follows the rotation of the driven, the secondary rotor is fixed to the hollow cylinder and to follow the rotation.

In order to achieve the above object, the present invention provides another fluid power generating device including a carrier, a power generating mechanism, a transmission mechanism and a generator set; the power generating mechanism is mounted on the carrier, the power generating mechanism includes a main shaft, a first driving wheel, a second driving wheel, a counter shaft, an impeller and a pair of impellers, the impeller and the first driving wheel respectively sleeve the main shaft and rotate synchronously with each other, the auxiliary impeller and the first The two driving wheels respectively sleeve the auxiliary shaft and rotate in synchronization with each other; the transmission mechanism is mounted on the bearing seat and is corresponding to the power generating mechanism, the transmission mechanism includes a first transmission component and a second transmission component, the first transmission component A transmission assembly includes a driven shaft and a first driven wheel fixed to the driven shaft, the first driven wheel is driven to rotate by the first driving wheel, and the second transmission assembly includes a sleeve that is coupled to the driven shaft a hollow cylinder and a second driven wheel fixed to the hollow cylinder, the second driven wheel is driven to rotate by the second driving wheel, and the rotating direction of the driven shaft and the rotating direction of the hollow cylinder Trans; The generator comprises a main rotor and the main rotor of a rotor to be provided, which is fixed to the main rotor and the driven shaft is rotated to follow, the secondary rotor is fixed to the hollow cylinder and to follow the rotation.

The invention also has the following effects. Firstly, the design of the magnetic repulsion structure enables the rotational torque at the start to be reduced. Secondly, the proper configuration of the first drive wheel and the second drive wheel can be used in the main axis. The frictional force during the start of rotation and during the rotation is reduced. Thirdly, by using the coaxial arrangement of the first driven wheel and the second driven wheel, the driven shaft can achieve a more balanced rotation effect when rotating, so as to reduce occurrence. The situation in which the rotors are unbalanced further extends the life of the fluid power generation device.

1‧‧‧Fluid power generation unit

10‧‧‧Hosting

11‧‧‧First support frame

12‧‧‧second support frame

20‧‧‧Transmission mechanism

201‧‧‧First transmission assembly

202‧‧‧Second drive assembly

21‧‧‧ driven shaft

211‧‧‧ Connection section

212‧‧‧ disc

22‧‧‧ hollow cylinder

23‧‧‧First driven wheel

24‧‧‧Second driven wheel

30‧‧‧Power Generation Agency

31‧‧‧ Spindle

32‧‧‧First drive wheel

321‧‧‧Perforation

23‧‧‧Second drive wheel

331‧‧‧ hole

34‧‧‧Auxiliary shaft

35‧‧‧ Impeller

351‧‧‧Main blade

36‧‧‧Sub impeller

40‧‧‧Generator

41‧‧‧Main rotor

411‧‧‧ coil

42‧‧‧Sub rotor

421‧‧‧ permanent magnet

60‧‧‧Magnetic structure

61‧‧‧ first ring frame

611‧‧‧Inlay hole

62‧‧‧second ring frame

621‧‧‧Fixed holes

63‧‧‧First magnetic component

631‧‧‧Main magnetic unit

632‧‧‧Submagnetic unit

64‧‧‧Second magnetic component

641‧‧‧Main magnetic unit

624‧‧‧Submagnetic unit

70‧‧‧ collecting hood

71‧‧‧ Straight pipe section

711‧‧‧through hole

72‧‧‧Into the wind segment

W‧‧‧ wind force

R‧‧‧First direction

L‧‧‧second direction

The first figure is a schematic view of a first embodiment of the present invention.

The second drawing is a perspective view of the first embodiment of the present invention.

The third drawing is an exploded view of the first embodiment of the present invention.

The fourth drawing is a use state diagram (1) of the first embodiment of the present invention.

The fifth drawing is a use state diagram (2) of the first embodiment of the present invention.

Figure 6 is a view showing the state of use of the second embodiment of the present invention.

The seventh drawing is a use state diagram of the third embodiment of the present invention.

The eighth figure is a use state diagram of the fourth embodiment of the present invention.

The ninth drawing is a use state diagram of the fifth embodiment of the present invention.

The tenth drawing is a use state diagram of the sixth embodiment of the present invention.

The detailed description and technical content of the present invention are set forth in the accompanying drawings.

Referring to the first embodiment, which is a schematic view of a first embodiment of the present invention, the present invention provides a fluid power generating device 1 which generates electric power using a fluid such as wind, water or ocean current. The fluid power generating device 1 mainly includes There is a carrier 10, a transmission mechanism 20, a power generating mechanism 30 and a generator set 40.

Please refer to the second and third figures, which are respectively a perspective view and an exploded view of the first embodiment of the present invention. The carrier 10 includes a first support frame 11 and a second support frame 12.

The transmission mechanism 20 is disposed on the carrier 10 and corresponding to the power generating mechanism 30. The transmission mechanism 20 includes a first transmission component 201 and a second transmission component 202. The first transmission component 201 includes a driven shaft 21 (as shown in the figure). 4) and the first driven wheel 23; the second transmission assembly 202 includes a hollow cylinder 22 and a second driven wheel 24; the hollow cylinder 22 is sleeved outside the driven shaft 21, and the driven shaft 21 extends outwardly from one end. The hollow cylinder 22 is pierced and a connecting section 211 is formed; the first driven wheel 23 is fixed on the connecting section 211, and the second driven wheel 24 is fixed on the outside of the hollow cylinder 22, and the first driven wheel 23 and the second driven wheel 24 are fixed. It is a helical gear.

The power generating mechanism 30 includes a main shaft 31, a first driving wheel 32 and a second driving wheel 33 and an impeller 35. The two ends of the main shaft 31 are respectively connected to the first supporting frame 11 and the second supporting frame 12, and the power generating mechanism 30 is between the first support frame 11 and the second support frame 12; the first drive wheel 32, the second drive wheel 33 and the impeller 35 are respectively fixed to the main shaft 31, and the first drive wheel 32 and the first driven wheel 23 are engaged. The second driving wheel 33 and the second driven wheel 24 are engaged; when the main shaft 31 is rotated, the first driving wheel 32 can drive the first driven wheel 23 to rotate, and the second driving wheel 33 can drive the second driven wheel 24 to rotate, and The rotation direction of the driven shaft 21 is opposite to the rotation direction of the hollow cylinder 22; in addition, the outer peripheral surface of the first driving wheel 32 defines a plurality of perforations 321 arranged at intervals, and the outer peripheral surface of the second driving wheel 33 is also arranged at intervals. The plurality of holes 331; in addition, the first drive wheel 32 and the second drive wheel 33 are respectively a helical gear.

The impeller 35 is fixed to the main shaft 31; the impeller 35 has a plurality of main blades 351, and the main blades 351 are arranged at equal intervals around the main shaft 31, so that the impeller 35 is a reverse impeller.

The genset 40 includes a rotor 42 including a main rotor 41 and a corresponding main rotor 41. The main rotor 41 is fixed to the driven shaft 21 and follows the rotation. The auxiliary rotor 42 is fixed to the hollow cylinder 22 and follows the rotation. The main rotor 41 is composed of a plurality of coils 411 fixed around the outer side of the driven shaft 21; the sub-rotor 42 is a plurality of permanent magnets 421 fixed to the outer peripheral surface of the hollow cylinder 22, and the permanent magnets 421 are opposite in polarity and staggered. The magnets are arranged.

Further, the fluid power generating device 1 of the present invention further includes a magnetic repulsion structure 60 disposed between the first support frame 11 and the second support frame 12; the magnetic repulsion structure 60 includes a first ring frame 61, a first The second ring frame 62, a first magnetic component 63 and a second magnetic component 64; the first ring frame 61 is disposed outside the first driving wheel 32, and the inner circumferential surface of the first ring frame 61 is provided with a plurality of intervals arranged at intervals The second ring frame 62 is disposed outside the second driving wheel 33, and the inner peripheral surface of the second ring frame 62 is provided with a plurality of fixing holes 621 arranged at intervals; the first magnetic component 63 is mounted on the first driving Between the wheel 32 and the first ring frame 61, the second magnetic component 64 is mounted between the second drive wheel 33 and the second ring frame 62.

The first magnetic component 63 includes a plurality of main magnetic units 631 and a plurality of sub-magnetic units 632. Each of the main magnetic units 631 is fixed in each of the through holes 321 of the first driving wheel 32, and each of the auxiliary magnetic units 632 is fixed to the first ring. Each of the main magnetic units 631 and each of the sub-magnetic units 632 are disposed in the same polarity and are of the same polarity.

The second magnetic component 64 includes a plurality of main magnetic units 641 and a plurality of sub-magnetic units 642. Each of the main magnetic units 641 is fixed in each of the holes 331 of the second driving wheel 33, and each of the auxiliary magnetic units 642 is fixed to the second ring. Each of the fixing holes 621 of the frame 62; each of the main magnetic units 641 and each of the sub-magnetic units 642 are correspondingly disposed and of the same polarity.

Referring to the fourth and fifth figures, which are respectively a use state diagram (1) and a use state diagram (2) of the first embodiment of the present invention, the fluid power generating device 1 can be used for the application of fluids such as hydraulic power or wind power. When the wind power generation device 1 is driven by the wind force W formed by a wind, the impeller 35 drives the main shaft 31 to rotate in a second direction L, so that the first drive wheel 32 drives the first driven wheel 23 and The driven shaft 21 rotates in a first direction R, and the second driving wheel 33 drives the second driven wheel 24 and the hollow cylinder 22 to rotate in the second direction L; the first direction R is a clockwise direction, and the second direction L is One counterclockwise.

Thereby, the main rotor 41 and the sub-rotor 42 are relatively moved, and an electric current is generated in each coil 411 of the main rotor 41 to achieve the effect of power generation.

The first driving wheel 32 drives the first driven wheel 23 to rotate in the first direction R, and the second driving wheel 33 drives the second driven wheel 24 to rotate in the second direction L, thereby driving the secondary rotor fixed to the hollow cylinder 22. 42 and the main rotor 41 fixed to the driven shaft 21 are rotated in opposite directions to each other to increase the relative distance between the main rotor 41 and the sub-rotor 42 due to the relative movement in the same unit time, and the main rotor 41 is increased. The relative velocity with the sub-rotor 42 increases the amount of current generated in the main rotor 41, thereby improving the power generation effect of the fluid power generator 1.

In addition, each of the primary magnetic units 631 of the first magnetic component 63 and each of the secondary magnetic components 632 of the first magnetic component 63 may be of the same polarity, and each of the secondary magnetic components 641 and the second of the second magnetic component 64 Each of the main magnetic units 642 of the magnetic component 64 is also of the same polarity, so that when the first drive wheel 32 is rotated relative to the first ring frame 61, each of the main magnetic units 631 and the first magnetic component 63 may be The principle that each pair of magnetic units 632 of a magnetic component 63 repels magnetic force to reduce the rotational torque during starting; similarly, when the second driving wheel starts to rotate and during the rotation, the second magnetic component can also be Each of the main magnetic unit 641 of the 64 and the magnetic unit 642 of the second magnetic component 64 repel each other magnetically, thereby reducing the rotational torque at the time of starting.

Referring to the sixth embodiment, which is a use state diagram of the second embodiment of the present invention, the main difference from the foregoing embodiment is that the power generating mechanism 30 further includes at least one auxiliary impeller 36 and one countershaft 34.

The first driving wheel 32 is fixed to the main shaft 31, and the second driving wheel 33 is fixed to the counter shaft 34. The two ends of the main shaft 22 and the counter shaft 23 are respectively connected with the first supporting frame 11 and the second supporting frame 12; the impeller 35 is fixed to the main shaft 31, the auxiliary impeller 36 is fixed to the countershaft 34; the impeller 35 is a forward impeller, and the counter impeller 36 is a reverse impeller. In addition, the first driven wheel 23, the second driven wheel 24, the first driving wheel 32, and the second driving wheel 33 are respectively a spur gear.

When the impeller 35 and the auxiliary impeller 36 are driven by the wind force W, the impeller 35 drives the main shaft 31 to rotate in the first direction R, so that the first driving wheel 32 drives the first driven wheel 23 and the driven shaft 21 toward the first direction. R rotates, at the same time, the auxiliary impeller 36 drives the counter shaft 34 to rotate in the second direction L, and the second driving wheel 33 drives the second driven wheel 24 and the hollow cylinder 22 to rotate in the second direction L; the first direction R is a clockwise direction In the direction, the second direction L is a counterclockwise direction, whereby the main rotor 41 fixed to the driven shaft 21 and the sub-rotor 42 fixed to the hollow cylinder 22 can be rotated in opposite directions, and the fluid can be generated. The device 1 has an effect of increasing the amount of power generation.

Referring to FIG. 7 , it is a use state diagram of the third embodiment of the present invention. The main difference from the foregoing embodiment is that the first ring frame 61 can also be disposed on the first driving wheel fixed to the main shaft 31 . 32 outside, and the second ring frame 62 may also be looped outside the second drive wheel 33 fixed to the countershaft 34, and the first magnetic component 63 may also be mounted between the first drive wheel 32 and the first ring frame 61. The second magnetic component 64 can also be mounted between the second drive wheel 33 and the second ring frame 62, whereby each of the first magnetic units 631, 641 of the first magnetic component 63 and the second magnetic component 64 can also be utilized. And the mutual repulsive force of each of the second magnetic units 632, 642 to reduce the rotational torque at the time of starting.

Referring to FIG. 8 , it is a use state diagram of the fourth embodiment of the present invention. The main difference from the foregoing embodiments is that a disc 212 is connected to one end of the driven shaft 21 away from the connecting section 211 , and the first ring is connected. The frame 61 can also be disposed outside the disk 212. The second ring frame 62 can also be disposed outside the hollow cylinder 22. The first magnetic component 63 can also be mounted between the disk 212 and the first ring frame 61. The second magnetic component 64 can also be mounted between the hollow cylinder 22 and the second ring frame 62.

The first magnetic component 63 includes a plurality of main magnetic units 631 fixed to the outer circumferential surface of the disk 212 and a plurality of secondary magnetic units 632 fixed to the inner circumferential surface of the first ring frame 61, each of the main magnetic units 631 and each of the secondary magnetic units 632 is correspondingly configured and is of the same polarity.

The second magnetic component 64 includes a plurality of main magnetic units 641 fixed to the outer circumferential surface of the hollow cylinder 22 and a plurality of sub magnetic units 642 fixed to the inner circumferential surface of the second annular frame 62, each of the main magnetic units 641 and each of the secondary magnetic units. Units 642 are correspondingly arranged and are of the same polarity. Thereby, the mutual repulsive force between each of the main magnetic units 641 and each of the sub-magnetic units 642 can be utilized to reduce the rotational torque at the time of starting.

Referring to FIG. 9 , it is a use state diagram of the fifth embodiment of the present invention. The main difference from the foregoing embodiments is that a second ring frame 62 can be looped on the outside of the hollow cylinder 22 and driven. The first ring frame 61 is not disposed outside the shaft 21, and a second magnetic component 64 is mounted between the hollow cylinder 22 and the second ring frame 62, and is not installed between the driven shaft 21 and the first ring frame 61. The structure of the first magnetic component 63 can also reduce the rotational torque at the time of starting.

Referring to FIG. 10, it is a use state diagram of a sixth embodiment of the present invention, which is mainly different from the foregoing embodiments in that it further includes a windshield 70 which is disposed at a front position of the impeller 35. The collecting hood 70 is mainly composed of a circular straight pipe section 71 and a funnel-shaped air inlet section 72 connected to the end of the straight pipe section 71. A plurality of through holes 711 are opened in the straight pipe section 71 when the fluid passes from the wind inlet section. When entering the interior of the collecting hood 70, it will first flow through the compression and then flow into the straight pipe section 71, so that external fluid can enter the straight pipe section 71 from each of the through holes 711 to increase the output of the fluid, thereby improving the impeller 35. The speed of rotation.

In summary, it is known that the fluid power generating device of the present invention has industrial applicability, novelty and advancement, and the structure of the present invention has not been seen in similar products and publicly used, and fully complies with the requirements of the invention patent application, and is based on the patent law. submit application.

1‧‧‧Fluid power generation unit

10‧‧‧Hosting

11‧‧‧First support frame

12‧‧‧second support frame

20‧‧‧Transmission mechanism

21‧‧‧ driven shaft

22‧‧‧ hollow cylinder

23‧‧‧First driven wheel

24‧‧‧Second driven wheel

31‧‧‧ Spindle

32‧‧‧First drive wheel

33‧‧‧Second drive wheel

35‧‧‧ Impeller

351‧‧‧Main blade

60‧‧‧Magnetic structure

61‧‧‧ first ring frame

62‧‧‧second ring frame

Claims (17)

A fluid power generation device comprising:
a carrier;
a power generating mechanism is mounted on the carrier, the power generating mechanism includes a main shaft, a first driving wheel, a second driving wheel and an impeller, and the impeller, the first driving wheel and the second driving wheel are respectively Threading the spindles and rotating in synchronization with each other;
a transmission mechanism is disposed on the carrier and corresponding to the power generating mechanism, the transmission mechanism includes a first transmission component and a second transmission component, the first transmission component includes a driven shaft and is fixed to the slave a first driven wheel of the moving shaft, the first driven wheel is driven to rotate by the first driving wheel, the second transmission component comprises a hollow cylinder sleeved with the driven shaft and one fixed to the hollow cylinder a second driven wheel, the second driven wheel is driven to rotate by the second driving wheel, and the rotating direction of the driven shaft is opposite to the rotating direction of the hollow cylinder; and a generator set including a main rotor and corresponding The main rotor is provided with a rotor, the main rotor is fixed to the driven shaft and follows the rotation, and the auxiliary rotor is fixed to the hollow cylinder and follows the rotation. The fluid power generating device of claim 1, wherein the carrier includes a first support frame and a second support frame disposed at intervals, and the two ends of the main shaft respectively pass through the first support frame and the second support Support frame. The fluid power generating device of claim 2, further comprising a magnetic repulsion structure disposed between the first support frame and the second support frame, the magnetic repulsion structure comprising a ring disposed outside the first drive wheel a first ring frame, a second ring frame disposed outside the second driving wheel, a first magnetic component mounted between the first driving wheel and the first ring frame, and a second driving device mounted on the second ring frame a second magnetic component between the wheel and the second ring frame. The fluid power generating device of claim 3, wherein the outer peripheral surface of the first driving wheel is provided with a plurality of perforations arranged at intervals, and the inner peripheral surface of the first ring frame is provided with a plurality of embedded holes arranged at intervals, a magnetic component includes a plurality of main magnetic units respectively fixed in the perforations and a plurality of sub-magnetic units respectively fixed in the embedding holes, each of the main magnetic units and each of the sub-magnetic units being correspondingly arranged Set and be the same magnetic pole. The fluid power generating device of claim 3, wherein the outer peripheral surface of the second driving wheel has a plurality of holes arranged at intervals, and the inner peripheral surface of the second ring frame is provided with a plurality of fixing holes arranged at intervals, the second The magnetic component includes a plurality of main magnetic units respectively fixed in the holes and a plurality of sub-magnetic units respectively fixed in the fixing holes, and each of the main magnetic units and each of the sub-magnetic units are correspondingly arranged It is the same magnetic pole. The fluid power generating device of claim 1, further comprising a magnetic repulsion structure, the driven shaft being coupled to a disk, the magnetic repulsion structure comprising a first ring frame disposed outside the disk and mounted on the a first magnetic component between the disk and the first ring frame, the first magnetic component comprising a plurality of main magnetic units fixed on an outer circumferential surface of the disk and a plurality of pairs fixed on an inner circumferential surface of the first ring frame The magnetic unit, each of the main magnetic units and each of the sub-magnetic units are correspondingly arranged and of the same polarity. The fluid power generating device of claim 1, further comprising a magnetic repulsion structure, the magnetic repulsion structure comprising a second ring frame disposed outside the hollow cylinder and mounted on the hollow cylinder and the second ring a second magnetic component between the frame, the second magnetic component comprising a plurality of main magnetic units fixed on the outer peripheral surface of the hollow cylinder and a plurality of sub-magnetic units fixed on the inner circumferential surface of the second ring frame, each of the plurality The main magnetic unit and each of the sub-magnetic units are correspondingly arranged and are of the same magnetic pole. The fluid power generating device of claim 1, wherein the main rotor comprises a plurality of coils, each of the coils is disposed around the driven shaft, and the secondary rotor is a plurality of permanent magnets fixed to an outer peripheral surface of the hollow cylinder. Permanent magnets consist of magnets of opposite polarity and staggered. The fluid power generating device of claim 1, further comprising a collecting hood disposed at a front position of the impeller. The fluid power generating device of claim 9, wherein the air collecting hood comprises a circular straight pipe section and a funnel-shaped air inlet section connected to an end of the straight pipe section. The fluid power generating device of claim 9, wherein a plurality of through holes are opened in the straight pipe section. A fluid power generation device comprising:
a carrier;
a power generating mechanism is mounted on the carrier, the power generating mechanism includes a main shaft, a first driving wheel, a second driving wheel, a counter shaft, an impeller and a pair of impellers, the impeller and the first driving The wheel respectively sleeves the main shaft and rotates synchronously with each other, and the auxiliary impeller and the second driving wheel respectively sleeve the auxiliary shaft and rotate synchronously with each other;
a transmission mechanism is disposed on the carrier and corresponding to the power generating mechanism, the transmission mechanism includes a first transmission component and a second transmission component, the first transmission component includes a driven shaft and is fixed to the driven a first driven wheel of the shaft, the first driven wheel is driven to rotate by the first driving wheel, the second transmission component comprises a hollow cylinder sleeved with the driven shaft and a first piece fixed to the hollow cylinder a second driven wheel, the second driven wheel is driven to rotate by the second driving wheel, and the rotating direction of the driven shaft is opposite to the rotating direction of the hollow cylinder; and a generator set including a main rotor and a corresponding main A rotor is disposed on the rotor, the main rotor is fixed to the driven shaft and follows the rotation, and the auxiliary rotor is fixed to the hollow cylinder and follows the rotation. The fluid power generating device of claim 12, wherein the carrier further comprises a pair of first support frames and a pair of second support frames disposed at intervals, the two ends of the main shaft and the auxiliary shaft respectively The first support frame is coupled to the second support frame, and the power generating mechanism is spanned between the remaining first support frame and the second support frame. The fluid power generating device of claim 12, wherein the impeller is a forward impeller, and the counter impeller is a reverse impeller. The fluid power generating device of claim 12, further comprising a collecting hood disposed at a front position of the impeller. The fluid power generating device of claim 15, wherein the hood comprises a circular straight pipe section and a funnel-shaped air inlet section connected to an end of the straight pipe section. The fluid power generating device of claim 15, wherein a plurality of through holes are formed in the straight pipe section.