Wide high efficiency area shaftless pipeline hydrogenerator

Abstract

The application discloses a shaftless pipeline water turbine generator with wide and high efficiency area, which comprises a static part and a rotating part; the static part comprises an end connection flange, a generator shell, a magnetic induction coil, a signal transmission and digital display system and a flow guide grid; the rotating part comprises a runner device, a rotating connection device, a permanent magnet and an annular chamber outer cover; the runner device comprises blades and a hub body; the rotating connection device is connected with the runner device internally, and the annular chamber outer cover is installed on the outer side of the rotating connection device; the permanent magnet is connected between the rotating connection device and the annular chamber outer cover. The water turbine generator can generate sufficient torque for the rotation of the blades along the radial direction, reduces the hydraulic loss, improves the overall hydraulic efficiency, improves the working efficiency by setting the open wide and high efficiency area airfoil blade, the blade installation angle alpha can be adjusted, and the application range of the device in the pipeline condition is expanded; the shaftless treatment is realized, the device structure is simplified, the loss is reduced, and the energy utilization efficiency is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of pipeline turbine power generation technology, specifically relating to a shaftless pipeline turbine generator with a wide high-efficiency range. Background Technology

[0002] Pipeline turbine generators are compact and efficient hydropower generation devices widely used in water conservancy and industrial fields. They are suitable for installation in flowing water in urban drainage pipelines and municipal water supply pipelines to recover and utilize excess pressure in the pipelines.

[0003] Currently, inline hydro turbines are primarily vertical shaft type. In vertical shaft turbines, one half of the runner rotates in the same direction as the flow, while the other half rotates in the opposite direction, resulting in lower overall hydraulic efficiency. The shaft system, the main component that fixes the runner, also introduces additional hydraulic losses during operation. Furthermore, to transmit torque and ensure sealing, the other side of the shaft system connects to the motor and seals, which increases frictional losses. Moreover, the hydro-generator requires a large starting torque to operate from rest, and the inlet flow must exceed a certain velocity to start the generator. This significantly limits the water flow conditions the generator can handle, making it more demanding in terms of water quality and narrowing its applicable range.

[0004] Pipeline turbines also generally suffer from drawbacks such as low space utilization, poor heat dissipation, and high noise and vibration during operation, leading to reduced service life, increased maintenance costs, complex operating conditions, and slow installation and commissioning efficiency. Therefore, designing a pipeline turbine generator with a simple structure and high energy utilization rate is of great significance in addressing these issues. Summary of the Invention

[0005] This invention provides a shaftless inline hydro generator with a wide and high-efficiency range. By improving the turbine structure, dynamic and static connections and sealing methods, flow guide scheme and overall structure of the inline hydro generator, the energy utilization efficiency of the inline hydro generator is improved and the applicable range of pipeline water flow is expanded. This provides a feasible approach for the improvement and development of new inline hydro generators, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a shaftless pipeline turbine generator with a wide and high-efficiency range, comprising a stationary component and a rotating component; the stationary component includes an end connecting flange, a generator housing, a magnetic induction coil, a signal transmission and digital display system, and a flow guide grid; the magnetic induction coil is installed inside the generator housing; the signal transmission and digital display system is installed outside the generator housing; the flow guide grid is fixedly installed inside the end connecting flange at the water inlet; the rotating component includes a runner assembly, a rotary connecting device, a permanent magnet, and an annular cavity outer cover; the runner assembly includes blades and a hub, the hub being a hollow vertical pipe, and the blades being spaced apart and mounted on the outer wall of the hub; the rotary connecting device is internally connected to the blades, and the annular cavity outer cover is installed on its outer side, with the permanent magnet connecting the two.

[0007] Preferably, the blade is an open-type wide-efficiency blade with an inlet installation angle of β1, where β1 satisfies -5°≤β1≤30°; an outlet installation angle of β2, where β2 is 90°; and a blade cascade density NS=N×sinθ / (D2-D1)×λ, where N represents the number of blades on the impeller, θ represents the twist angle between blades, D2 and D1 represent the hub diameter and rim diameter, respectively, λ represents the blade cascade compactness coefficient, with a value between 0.8 and 1.2, and NS satisfies 0.4≤NS≤1.0.

[0008] Preferably, the blade can be installed at an angle α according to the different bolt positions on the hub and rim of the hub body.

[0009] Preferably, the pipe diameter of the pipeline turbine generator is D, the flange diameter is D1, satisfying D1=K1*D, the hub diameter is D2=K2*D, where the value of K1 is in the range of 0.5≤K1≤0.95, and the value of K2 is in the range of 0.2≤K1≤0.6; the thickness of the hub body is H, satisfying H=K3*D, where the value of K3 is in the range of 0.05≤K3≤0.3.

[0010] Preferably, the connection between the stationary component and the rotating component is sealed using a labyrinth seal.

[0011] Preferably, the generator housing has a ring-shaped structure, wrapping around the outside of the generator, and is fixed to the end connecting flanges on both sides in a fence-like manner.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. At the inlet, the water flow is uniform under the guidance of the guide grid and washes the blades at a certain speed and direction. Washing the blades along the outer diameter will generate enough torque to make the blades rotate, reduce hydraulic loss and improve overall hydraulic efficiency.

[0014] 2. By setting open-type wide-range high-efficiency airfoil blades and using uniform spiral arrangement, the water flow in the pipe scours the blades and impacts them along the outer diameter direction. After the impact, the water quickly leaves the impeller, improving the working efficiency and obtaining a larger lift-to-drag ratio. At the same time, it is easier to reach the maximum torque coefficient, which will improve the working capacity of the turbine and prevent leakage when the water flows through the blade cascade.

[0015] 3. The blade installation angle α can be adjusted, which can provide a wider high-efficiency range when dealing with different pipeline flow velocities. It can adapt to different water flow conditions in the pipeline and expand the applicability of the device to water quality and operating conditions.

[0016] 4. This invention adopts a shaftless structure, which realizes shaftless treatment inside the hydro-generator, simplifies the device, reduces its friction loss under working conditions, thereby reducing the torque required for starting and stopping the device, and expanding the applicability of the device to pipelines.

[0017] 5. Through reasonable sealing design, the device not only meets the sealing requirements of the device under different working conditions of the pipeline, but also realizes the coaxial rotation of the impeller device, simplifying the device.

[0018] 6. Under the condition of ensuring the basic operation of the device, the present invention simplifies the device structure, expands the applicability of the device in pipeline conditions, reduces losses, improves heat dissipation, and greatly improves energy utilization efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the shaftless pipeline turbine generator of the present invention;

[0020] Figure 2 This is a schematic diagram of a quarter-section of the shaftless pipe turbine generator of the present invention.

[0021] Figure 3 This is a schematic diagram of the longitudinal cross-sectional structure of the shaftless pipeline turbine generator of the present invention;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of the shaftless pipeline turbine generator of the present invention;

[0023] Figure 5 This is a schematic diagram of the overall structure of the rotary device of the present invention;

[0024] Figure 6 This is a schematic diagram of the sealing structure at the connection between the moving and stationary components of the present invention.

[0025] In the diagram: 1. Stationary component, 2. Rotating component, 3. Seal, 11. End connection flange, 12. Flow deflector, 13. Signal transmission and digital display system, 14. Generator housing, 15. Magnetic coil, 21. Runner assembly, 22. Rotary connection device, 23. Permanent magnet, 24. Annular cavity outer cover, 211. Hub body, 212. Blade. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-4This invention provides a shaftless inline hydro-generator with a wide and high-efficiency range, comprising a stationary component 1 and a rotating component 2. The stationary component 1 includes an end connecting flange 11, a generator housing 14, a magnetic induction coil 15, a signal transmission and digital display system 13, and a flow guide grating 12. The magnetic induction coil 15 is installed inside the generator housing 14. The signal transmission and digital display system 13 is installed outside the generator housing 14. The electrical energy required for the signal transmission and digital display system 13 is supplied by the hydro-generator, eliminating the need for an external power source that would complicate the device structure. Furthermore, the inline hydro-generator 13... An external battery or other energy storage element is connected to ensure the continuous normal operation of the signal transmission and digital display system 13, and to allow excess power to be supplied to other electrical facilities. This signal transmission and digital display system 13 is not unique; other systems meeting the requirements are also acceptable. The flow guide grating 12 is fixedly installed inside the end connecting flange 11 at the water inlet. The rotating component 2 includes a rotating wheel device 21, a rotating connecting device 22, a permanent magnet 23, and an annular cavity outer cover 24. The rotating wheel device 21 includes blades 212 and a hub body 211, the hub body 211 being a hollow vertical pipe. The blades 212 are spaced apart and mounted on the outer wall of the hub body 211; the rotating connecting device 22 is internally connected to the blades 212, and the annular cavity outer cover 24 is installed on the outside, with the permanent magnet 23 connecting the two; under the constraint of the pipeline, water flows through the pipeline into the shaftless pipeline turbine generator unit. At the inlet, the water flow is uniform under the guidance of the guide grid 12, and washes the blades 212 at a certain speed and direction. Washing the blades 212 along the outer diameter direction will generate enough torque to make the blades 212 rotate, and then the blades 212 will drive the outer annular block The permanent magnet 23 rotates synchronously, and the magnetic field generated by the permanent magnet 23 also rotates accordingly. At this time, the magnetic coil 15 remains stationary, causing the coil to cut the magnetic field lines of the moving magnetic field, thereby generating an induced current, thus realizing the function of the shaftless pipeline turbine generator to generate electricity, realizing the conversion of mechanical energy into electrical energy. The shaftless pipeline turbine generator is an integrated structure. This device simplifies the structure of the entire pipeline turbine generator by making the blades and permanent magnets shaftless, while effectively reducing the size and weight of the device, and reducing its noise and vibration during operation.

[0028] like Figure 5As shown, the blade 212 is an open-type, wide-range, high-efficiency blade. The blade inlet installation angle is β1, where β1 satisfies -5°≤β1≤30°; the outlet installation angle is β2, where β2 is 90°; the blade cascade density NS=N×sinθ / (D2-D1)×λ, where N represents the number of blades on the impeller, θ represents the twist angle between blades, D2 and D1 represent the hub diameter and rim diameter, respectively, and λ represents the blade cascade compactness coefficient, with a value between 0.8 and 1.2. NS satisfies 0.4≤NS≤1.0. In this embodiment, an airfoil blade 212 is used, but it is not limited to this. The water flow inside the impeller 212 impacts the blades along the outer diameter direction and then quickly leaves the impeller, which improves the working efficiency. The blades 212 are arranged in a uniform spiral and there are 4 blades. A moderate value for β1, such as 15°, can obtain a larger lift-to-drag ratio and make it easier to reach the maximum torque coefficient, which will improve the working capacity of the turbine. A moderate value for NS, such as 0.6, is also important. A small NS value may cause leakage when the water flows through the blade cascade, resulting in a decrease in efficiency; a large NS value may cause a large loss of water flow on the blade cascade, which will also reduce efficiency.

[0029] The blade 212 can be adjusted at the installation angle α according to the different bolt positions on the hub and rim of the hub body 211. In this embodiment, the blade installation angle α should satisfy -6°≤α≤6°, which can provide a wider high-efficiency range when dealing with different pipeline flow velocities, improve the overall working efficiency of the equipment, reduce energy loss during operation, and reduce the energy required for starting and stopping the device. In addition, when each blade 212 is washed by water flow, because the blade installation angle α can be adjusted, it will cause a certain degree of deflection along the flow direction with the direction of water flow, which will be more adaptable to various water flow conditions and improve the practicality and versatility of the pipeline turbine.

[0030] like Figure 1 , Figure 4 As shown, the pipe diameter of the inline hydro-generator is D, the flange diameter is D1, satisfying D1 = K1 * D, and the hub diameter is D2 = K2 * D, where the value of K1 ranges from 0.5 ≤ K1 ≤ 0.95, and the value of K2 ranges from 0.2 ≤ K1 ≤ 0.6; the thickness of the hub body is H, satisfying H = K3 * D, where the value of K3 ranges from 0.05 ≤ K3 ≤ 0.3; in this embodiment, the pipe diameter D is preferably 200 mm, D1 is preferably 190 mm, D2 is preferably 70 mm, and H is preferably 10 mm; when facing pipes of different diameters, the parameters of the inline hydro-generator can be changed with reference to this ratio to cope with the problems faced in different working scenarios.

[0031] like Figure 6As shown, the connection between the stationary component 1 and the rotating component 2 is sealed with a labyrinth seal 3. In this embodiment, while meeting the basic requirements for sealing at high speeds, the coaxial rotation of the rotating component 2 is achieved, reducing additional structures and the weight of the device. This allows the device to adapt to sealing problems under different working conditions, simplifies the equipment, and avoids water seepage into the windings that could cause short circuits or leakage, affecting the machine's service life and safety. This, in turn, promotes the power generation efficiency of the hydro-generator. Other sealing methods that can meet the requirements are acceptable.

[0032] like Figure 1-2 As shown, the generator housing 14 has a ring-shaped structure, wrapping around the outside of the generator, and is fixed to the end connecting flanges 11 on both sides in a grid-like manner. In this embodiment, it is convenient to install and remove, and the hollow generator housing 14 improves the heat dissipation efficiency of the device. It can not only ensure isolation from the outside world and maintain a static state, but also increase the heat dissipation efficiency, thereby increasing the heat dissipation efficiency of the pipeline turbine generator during operation, improving the operating efficiency and stability of the pipeline turbine generator, and saving device space and manufacturing costs.

[0033] To facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process will be described in detail below.

[0034] Working principle: Under the constraint of the pipeline, water flows into the shaftless pipeline turbine generator unit through the pipeline. At the inlet, the water flow is uniform under the guidance of the guide shroud 12 and washes the blades 212 at a certain speed and direction. Washing the blades 212 along the outer diameter direction will generate enough torque to make the blades 212 rotate. In turn, the blades will drive the outer ring block permanent magnet 23 to rotate synchronously. The magnetic field generated by the magnet 23 will also rotate. At this time, the magnetic coil 15 will remain stationary, which will cause the coil to cut the magnetic field lines of the moving magnetic field, thereby generating an induced current, thus realizing the function of the shaftless pipeline turbine generator to generate electricity and realize the conversion of mechanical energy into electrical energy.

[0035] This invention relates to a shaftless inline hydro-generator with an integrated structure. By eliminating the shaft between the blades and permanent magnets, the entire structure of the inline hydro-generator is simplified, effectively reducing its size, weight, noise, and vibration during operation. Furthermore, the blade installation angle in the runner is adjustable, expanding the high-efficiency zone and improving the generator's efficiency and energy conversion capacity. To address the connection between stationary and rotating components, a labyrinth seal structure is employed. This satisfies the requirements for both static and dynamic connections and sealing while enabling coaxial rotation of the rotating components, addressing sealing issues under different operating conditions within the pipeline and simplifying the equipment. This invention also improves the ease of installation and structural integrity of the device, enhancing heat dissipation and improving the utilization efficiency of water energy within the pipeline.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shaftless inline hydro generator with a wide high-efficiency range, comprising stationary components and rotating components; characterized in that, The stationary component includes an end connecting flange, a generator housing, a magnetic induction coil, a signal transmission and digital display system, and a flow guide grid; the magnetic induction coil is installed inside the generator housing; the signal transmission and digital display system is installed outside the generator housing; the flow guide grid is fixedly installed inside the end connecting flange at the water inlet; the rotating component includes a rotor assembly, a rotary connecting device, a permanent magnet, and an annular cavity outer cover; the rotor assembly includes blades and a hub, the hub being a hollow vertical pipe, and the blades being spaced apart and installed on the outer wall of the hub; the rotary connecting device is internally connected to the blades, and the annular cavity outer cover is installed on its outer side; the permanent magnet is connected between the rotary connecting device and the annular cavity outer cover; The blades are open-type, wide-range, high-efficiency blades. The blade inlet installation angle is β1, where β1 satisfies -5°≤β1≤30°; the outlet installation angle is β2, where β2 is 90°; the blade cascade density NS=N×sinθ / (D2-D1)×λ, where N represents the number of blades on the impeller, θ represents the twist angle between blades, D2 and D1 represent the hub diameter and rim diameter, respectively, λ represents the blade cascade compactness coefficient, with a value between 0.8 and 1.2, and NS satisfies 0.4≤NS≤1.0; The blade can be installed at an angle α according to the different bolt positions on the hub and rim of the hub body.

2. The shaftless pipeline turbine generator with a wide high-efficiency range according to claim 1, characterized in that, The pipe diameter of the pipeline turbine generator is D, the flange diameter is D1, satisfying D1=K1*D, the hub diameter is D2=K2*D, where the value of K1 is 0.5≤K1≤0.95, and the value of K2 is 0.2≤K1≤0.6; the thickness of the hub body is H, which satisfies H=K3*D, where the value of K3 is 0.05≤K3≤0.

3.

3. The shaftless pipeline turbine generator with a wide high-efficiency range according to claim 1, characterized in that, The connection between the stationary component and the rotating component is sealed using a labyrinth seal.

4. A shaftless pipeline turbine generator with a wide high-efficiency range according to claim 1, characterized in that, The generator housing has a ring-shaped structure, wrapping around the outside of the generator, and is fixed to the end connecting flanges on both sides in a fence-like manner.

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