TWI883928B - Synchronous turbine - Google Patents

Abstract

The present invention provides a synchronous water turbine, including: a pair of water wheel assemblies, the water wheel assemblies including a rotating shaft, an impeller, a gear and an impeller guard. When the rotating shaft and the impeller are used in pairs, the rotation speed of the rotating shaft and the impeller can be synchronized by the engagement of the paired gear assemblies. Since the paired impellers have synchronous rotation speeds, the blades can be effectively prevented from being misaligned, and a mutually matching arrangement can be adopted, thereby reducing the gap between the impellers and the tip-to-tip contact between the paired impellers, and reducing the external water flow lost from the gap. Moreover, the water flow can flow smoothly to the water outlet to avoid stagnation of the impeller, thereby reducing the power loss of the impeller and improving the energy conversion efficiency. The impeller guard can protect the impeller while increasing the water capacity of the impeller, thereby improving the working efficiency of the impeller.

Description

Synchronous turbine

A device related to the field of water turbines, in particular a synchronous water turbine using a shaft, an impeller and a gear in pairs.

Hydropower is a common method of generating electricity. It uses the potential energy in the water to convert into kinetic energy to impact the generator impeller, driving the generator shaft to rotate and generate electricity. In traditional hydropower generation, the impeller driven by water needs to be driven by the shaft to drive the gear, and the shaft will also engage the gear for transmission. When the load connected to the gear is too heavy, the gear and the shaft may slip relative to each other due to insufficient friction, thereby reducing the energy conversion efficiency.

In addition, when the blades of a traditional twin-impeller turbine are used in pairs, in order to avoid interference between the blades, the axial distance between the paired shafts needs to be greater than twice the impeller radius, and even the gap needs to be increased to reduce the possibility of damage caused by blade interference; or a speed regulating device needs to be designed to adjust the speed between the paired impellers to stagger the blades. Otherwise, the impeller close to the external water inlet may hit the blades of the other impeller due to the faster speed of receiving water, causing damage and energy waste. Regardless of the above design, it will reduce the net energy output and lead to lower energy conversion efficiency.

In view of the defects of known water turbines, such as the need to reserve gaps between paired impeller blades, which results in poor water reception efficiency and the tendency for water to flow out of the gaps, the inventor of this case has been actively developing inventions that can solve the above problems.

The main purpose of the present invention is to provide a synchronous water turbine that uses gear engagement to synchronize the paired impellers and coordinate the rotational state between the paired impellers so that the blade tips of each other correspond to each other. Through the aforementioned synchronous matching design, the distance between the paired impellers is reduced to reduce the amount of water lost from the gap.

The synchronous water turbine provided by the present invention has a pair of water wheel assemblies, and the water wheel assemblies include: a rotating shaft, an impeller and a gear. The rotating shaft can be connected to an external power generation device; the impeller connected to the rotating shaft has a plurality of blades for receiving the impact of external water flow to drive the rotating shaft to rotate; the gear and the impeller are coaxially arranged on the rotating shaft.

A preferred embodiment of the present invention, wherein the paired gears are engaged with each other, thereby synchronizing the rotation speeds of the paired rotating shafts.

A preferred embodiment of the present invention, wherein the impeller and the gear in the water wheel assembly are coaxially arranged at opposite ends of the rotating shaft. The paired impellers are arranged to fit each other and the paired gears are meshed with each other, and the blades of the paired impellers correspond to each other to form a fitting design. The meshing of the paired gears makes the speed of the paired rotating shafts the same, achieving synchronous rotation of the paired impellers to avoid the blades staggered to form gaps, causing external water loss and reducing the energy conversion rate.

Specifically, the present invention utilizes a gear meshing design to control the speed of the paired shafts and thereby synchronize the speed difference between the impellers, so that the paired impellers can be arranged to fit each other to increase the conversion efficiency. The aforementioned fitting arrangement is such that the corresponding blades of the paired impellers will present a mirror-symmetric state, and the paired impellers will simultaneously receive and drain water, reducing the loss of water from the gaps between the corresponding blades.

Preferably, the water-facing area of the impeller blades accounts for two-thirds of the area of the blades to achieve the best energy conversion efficiency.

A preferred embodiment of the present invention, wherein the synchronous turbine also has an impeller protection plate, which is arranged on both sides of the impeller. The impeller is protected from collision damage, and a water guide groove is formed between the impeller protection plate and the impeller blades to increase the water capacity of the impeller to improve working efficiency.

A preferred embodiment of the present invention, wherein the synchronous turbine further includes a housing for protecting and supporting the shaft and the impeller. The housing has: a storage space, a water inlet and a water outlet. The storage space is used to accommodate the shaft and the impeller; the water inlet is arranged between the pair of impellers so that the pair of impellers can be evenly stressed; and the water outlet is arranged on the housing opposite to the water inlet to discharge the water that has flushed the impeller out of the housing.

A preferred embodiment of the present invention, wherein the synchronous water turbine further comprises: a helical gear shaft, wherein two opposite ends of the helical gear shaft are provided with synchronous helical gears. And the gear of the water wheel set is a helical gear, and the synchronous helical gear and the gear are engaged with each other to synchronize the rotation of the paired impellers.

1: Rotation axis

2: Impeller

21: Leaves

3: Gear

4: Shell

41: Storage space

42: Water inlet

43: Water outlet

5: Impeller guard

51: Water diversion channel

Figure 1 is a three-dimensional schematic diagram of an embodiment of the present invention; Figure 2 is a three-dimensional schematic diagram of the first embodiment of the present invention used in pairs; Figure 3 is a front view of the first embodiment of the present invention; Figure 4 is a three-dimensional schematic diagram of the second embodiment of the present invention; Figure 5 is a three-dimensional schematic diagram of the third embodiment of the present invention; Figure 6 is a three-dimensional schematic diagram of the fourth embodiment of the present invention; Figure 7 is a three-dimensional schematic diagram of the fifth embodiment of the present invention; Figure 8 is a three-dimensional schematic diagram of the sixth embodiment of the present invention; and Figure 9 is a three-dimensional schematic diagram of the seventh embodiment of the present invention.

In order to facilitate the understanding of the present invention, the present invention is described in detail below in conjunction with the attached drawings and embodiments. The attached drawings show some embodiments of the present invention, but not all embodiments. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making progressive efforts are within the scope of protection of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

Figures 1 to 9 are schematic diagrams of a synchronous turbine according to an embodiment of the present invention. As shown in the three-dimensional schematic diagram of the embodiment of the present invention in Figure 1, the synchronous turbine according to the present invention has a water wheel assembly, and the water wheel assembly includes: a rotating shaft 1, an impeller 2 and a gear 3. Among them, the rotating shaft 1 can be connected to an external device, such as: a power generation device or a transmission system. The impeller 2 is connected to the rotating shaft 1 to receive external water flow impact to drive the rotating shaft 1, and the impeller 2 has a plurality of blades 21 arranged on the outer surface to increase the water-facing area receiving external water flow impact. The gear 3 is coaxially arranged on the wheel shaft 1 with the impeller 2.

A preferred embodiment of the present invention is shown in the three-dimensional schematic diagram of the first embodiment of the present invention in FIG2. The rotating shaft 1, the impeller 2 and the gear 3 in the water wheel assembly are used in pairs. The gear 3 can be set at one end of the rotating shaft 1, and the impeller 2 is set at the other end of the rotating shaft 1. The paired gears 3 are engaged with each other to synchronize the speed of the paired rotating shaft 1 and the paired impeller 2. As shown in the front view of the first embodiment in FIG3, when in use, the paired impeller 2 is set in the external water flow, and the external water flow is allowed to flow between the paired impellers 2, impacting the blades 21 so that the impeller 2 drives the rotating shaft 1. In conjunction with the power generation device or transmission system connected to the rotating shaft 1, the external water flow is used as a power generation source or a power source.

As shown in FIG3 , the blades 21 of the paired impellers 2 are arranged to fit each other. That is, the blades 21 of the paired impellers 2 correspond to each other, forming a mirror-like rotation state, but the blades 21 of the paired impellers 2 do not touch each other. By means of the mutually fitting arrangement and the meshing paired gears 3, the water wheel assembly can increase the axial distance of the paired impellers 2 to increase the energy conversion efficiency. At the same time, the paired gears 3 are meshed to synchronize the rotation speed of the paired impellers 2, so as to avoid the difference in the rotation speed of the paired impellers 2 causing the blade tips of each other's blades 21 to be misaligned to form gaps, causing the external water flow to be lost and causing energy waste.

A preferred embodiment of the present invention, as shown in FIG4, further comprises an impeller protection plate 5, which is arranged on both sides of the impeller 2. The impeller protection plate 5 and the blades 21 form a water guide groove 51, which protects the impeller 2 from damage and increases the water volume of the impeller 2 to increase the energy conversion efficiency.

Preferably, the impeller guard plate 5 and the impeller 2 are connected in a freely detachable manner.

A preferred embodiment of the present invention, as shown in the three-dimensional schematic diagram of the third embodiment of the present invention in Figure 5, the rotating shaft 1 can be connected to multiple impellers 2 at the same time to increase the water-facing area and improve the power generation efficiency.

A preferred embodiment of the present invention, wherein, as shown in the three-dimensional schematic diagram of the fourth embodiment of the present invention in FIG6 , the impeller 2 is connected to both ends of the rotating shaft 1, and the gear 3 is disposed between the impellers 2.

A preferred embodiment of the present invention, as shown in FIG6 , when the impeller 2 is connected to both ends of the rotating shaft 1, multiple impellers 2 can also be used simultaneously to increase the water-facing area and improve the power generation efficiency.

A preferred embodiment of the present invention, as shown in FIG7 of the front view of the fifth embodiment of the present invention, the synchronous turbine further includes a housing 4 connected to the shaft 1 for protection and support. The housing 4 has: a containing space 41, a water inlet 42 and a water outlet 43, wherein the containing space 41 is formed inside the housing 4 to accommodate the shaft 1 and the impeller 2; the water inlet 42 is arranged on one side of the housing 4 between the pair of impellers 2 to introduce external water flow to flush the blades 21; and the water outlet 43 is arranged on the housing 4 on the opposite side of the water inlet 42 to collect the external water flow that has flushed the blades 21 and discharge it from the housing 4.

A preferred embodiment of the present invention, as shown in the three-dimensional schematic diagram of the sixth embodiment of the present invention in FIG8, when multiple impellers 2 are used simultaneously, an impeller guard plate 5 can be provided on the side of the outermost impeller 2 to protect the impeller 2 and improve the working efficiency of the impeller 2.

A preferred embodiment of the present invention, wherein, as shown in the three-dimensional schematic diagram of the seventh embodiment of the present invention in FIG9 , the impeller 2 is connected to both ends of the rotating shaft 1, and the gear 3 is arranged between the impellers 2. When, the outer side surfaces of the impellers 2 at both ends and the side surfaces of the impellers 2 close to the gear 3 can be provided with impeller guards 5 to protect the impeller 2 and improve the working efficiency of the impeller 2.

The above-mentioned embodiments only express the preferred implementation of the present invention, and the description is relatively specific and detailed, but it should not be understood as limiting the patent scope of the present invention. It should be pointed out that ordinary technicians in this field can make several changes and improvements without departing from the original creative concept, which are all within the protection scope of the present invention.

1: Rotation axis

2: Impeller

21: Leaves

3: Gear

5: Impeller guard

51: Water diversion channel

Claims (7)

A synchronous water turbine having at least one pair of water wheel assemblies, each of which comprises: a rotating shaft; at least one impeller disposed on the rotating shaft; and at least one gear disposed on the rotating shaft coaxially with the impeller, wherein the blades of the impellers of the at least one pair of water wheel assemblies are mutually matched, and the gears are mutually engaged. As described in claim 1, the synchronous turbine is compatible with each water wheel assembly, and each water wheel assembly further includes: an impeller guard plate, which is arranged on two opposite axial sides of the impeller. A synchronous turbine as described in claim 2, wherein a plurality of impellers are arranged on each rotating shaft. A synchronous turbine as described in claim 2, wherein the impellers are disposed at both ends of each rotating shaft, and the at least one gear is disposed between the impellers at both ends of the rotating shaft. A synchronous turbine as described in claim 4, wherein a plurality of impellers are provided at both ends of the rotating shaft. The synchronous turbine as described in any one of claims 1 to 5 further comprises a housing connected to each of the rotating shafts and having: a housing space for accommodating the rotating shaft, the impellers and the gears; a water inlet disposed on a side of the housing corresponding to the pair of impellers, and a water outlet disposed on the housing on the opposite side of the water inlet. A synchronous turbine as described in claim 6, wherein the gear and the shaft are integrally formed.

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