Self-adjusting power generation driving device

Abstract

The invention belongs to the technical field of generators, and particularly relates to an automatically-adjusted power generation driving device which comprises a shell and a water wheel arranged in the shell, an adjusting lever is hinged to the open side of the shell, one end of the adjusting lever is rotationally connected with a water wheel shaft of the water wheel, and the other end of the adjusting lever is rotationally connected with the water wheel shaft of the water wheel. A buoyancy plate is arranged at the other end of the adjusting lever and extends out of the opening of the shell, and blades of the water wheel are exposed out of the opening of the shell along with swinging of the buoyancy plate. An adjusting lever with the two ends capable of swinging is hinged into a shell of the device, a buoyancy plate is installed on the long side of the lever and extends into a pipeline, a water wheel capable of rotating in the circumferential direction is installed on the short side of the lever, and the water surface height is changed due to the flow in the pipeline, so that the buoyancy plate is driven to change the angle of the adjusting lever; and the water wheel changes the draught depth of the blades according to the height of the water surface, so that the power generation device can reduce energy conversion when the flow in the pipe is small, and the influence on the water flow is reduced.

Description

Technical Field

[0001] This invention belongs to the field of generator technology, and specifically relates to an automatically adjustable power generation drive device. Background Technology

[0002] Hydropower utilizes the potential energy of water flowing from higher elevations, such as rivers and lakes, to lower elevations. This potential energy is converted into the kinetic energy of a turbine, which then powers a generator to produce electricity. Hydropower uses water to drive hydraulic machinery, converting water energy into mechanical energy. If another machine is connected to the turbine and rotates with it, electricity can be generated, thus converting mechanical energy back into electrical energy. In a sense, hydropower is the process of converting the potential energy of water into mechanical energy, and then into electrical energy.

[0003] A power generation device for mountain drinking water pipelines disclosed in patent CN201714560U involves installing several water turbine-driven generators on a mountain drinking water pipeline with potential energy differences. The water turbines are embedded within the drinking water pipeline, and the portion where the water turbine intersects the pipeline does not exceed the pipeline's centerline. The housings of the water turbines and generators are sealed to isolate them from the outside environment. Another power generation device for municipal water plant intake pipelines and tap water pipelines in mountainous areas involves installing impulse generators at the outlet of the intake pipeline with potential energy differences and before the branch pipelines of the main tap water supply pipeline. Several water turbine-driven generators are installed on the main pipelines from the reservoir to the municipal water plant and from the water plant to residential areas. The power generation device integrates the pipeline, water turbine, and generator. The portion where the water turbine intersects the pipeline does not exceed the pipeline's centerline, ensuring that the water turbine's rotation during power generation does not excessively affect the water pressure.

[0004] In the above scheme, although the part where the water impeller intersects with the pipe is set at a position not exceeding the center line of the pipe, the flow rate inside the pipe is not necessarily at maximum. The water flow may only occur in the lower half circle of the pipe, but the water impeller is still under full load. This will have a significant impact on the water pressure, especially at low flow rates. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems by providing an automatically adjustable power generation drive device that can solve the above-mentioned technical issues.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: An automatically adjustable power generation drive device includes a housing and a water turbine disposed in the housing. An adjusting lever is hinged to the open side of the housing. One end of the adjusting lever is rotatably connected to the water turbine shaft of the water turbine. The other end of the adjusting lever is provided with a buoyancy plate extending out of the housing opening. The blades of the water turbine are exposed outside the housing opening as the buoyancy plate swings.

[0007] In the aforementioned automatically adjustable power generation drive device, the housing has adjustment grooves on opposite sides, and the ends of the water turbine shafts slide through the adjustment grooves respectively. The ends of the water turbine shafts extending out of the housing are connected to the rotor input end for transmission.

[0008] In the aforementioned automatically adjustable power generation drive device, the sliding stroke of the water turbine shaft in the adjusting groove is arc-shaped, and the hinge point between the adjusting lever and the housing is correspondingly set at its center.

[0009] In the aforementioned automatically adjustable power generation drive device, the sliding stroke of the water turbine shaft in the adjusting groove is arc-shaped, and the rotor shaft is located at its center.

[0010] In the aforementioned automatically adjustable power generation drive device, the adjusting lever is divided into a long rod portion and a short rod portion on both sides at the hinge point with the housing. One end of the short rod portion is rotatably connected to the water turbine shaft, and the buoyancy plate is installed on the part of the long rod portion that extends out of the housing opening.

[0011] In the aforementioned automatically adjustable power generation drive device, an axially sliding sleeve is fitted onto the short rod portion, and the end of the sleeve is rotatably connected to the water turbine shaft via a bearing mounted on the water turbine shaft.

[0012] In the aforementioned automatically adjustable power generation drive device, an elastic element is provided on the housing and connected to the adjusting lever. The elastic element acts on the adjusting lever to move the turbine axis within the housing.

[0013] In the aforementioned automatically adjustable power generation drive device, a stator is isolated inside the housing, and the rotor is rotatably disposed within the stator with its input end passing through the housing to the outside.

[0014] In the aforementioned automatically adjustable power generation drive device, the open side of the housing is provided with a pipe end cap that extends in all directions, so that the water turbine shaft is located off-center from the pipe axis.

[0015] In the aforementioned automatically adjustable power generation drive device, a concave flow zone is provided on the water-facing surface of the blades, and the concave flow zone is located at the midpoint of the axial length of the turbine.

[0016] In the aforementioned automatically adjustable power generation drive device, the edge of the blade is provided with an outwardly extending water-collecting baffle, and both sides of the blade are provided with outwardly extending water-collecting baffles. The side of the water-collecting baffle away from the blade does not exceed the axial end face of the water turbine.

[0017] In the aforementioned automatically adjustable power generation drive device, a baffle plate is provided inside the housing, and the baffle plate is positioned between the water turbine and the buoyancy plate.

[0018] The advantages of this invention are: An adjusting lever with swingable ends is hinged inside the housing of the device. A buoyancy plate is installed on the longer side of the lever and extends into the pipeline, while a water wheel that can rotate circumferentially is installed on the shorter side of the lever. As the flow rate in the pipeline changes, the water level also changes, thereby causing the buoyancy plate to change the angle of the adjusting lever. The water wheel then changes the draft of its blades according to the water level, so that the power generation device can reduce energy conversion and minimize the impact on the water flow when the flow rate in the pipeline is low.

[0019] This allows at least a portion of the water to be recycled for power generation, maximizing water utilization. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0022] Figure 3 This is a schematic cross-sectional view of the present invention.

[0023] Figure 4 This is a schematic diagram of the V-shaped blade structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the arc-shaped blade structure of the present invention.

[0025] In the diagram, the components are: housing 1, adjusting slide 11, pipe end cap 12, baffle 13, water wheel 2, water wheel shaft 21, blade 22, bearing 23, concave flow zone 24, water collection baffle 25, guide pulley 26, adjusting lever 3, buoyancy plate 31, long rod 32, short rod 33, sleeve 34, elastic element 35, rotor 41, and stator 42. Detailed Implementation

[0026] The following are specific embodiments of the invention, which are described in conjunction with the accompanying drawings. The technical solution of the invention will be further described, but the invention is not limited to these embodiments.

[0027] Example 1

[0028] like Figures 1-3 As shown, the automatically adjustable power generation drive device includes a housing 1 and a water turbine 2 installed in the housing 1. An adjusting lever 3 is hinged to the open side of the housing 1. One end of the adjusting lever 3 is rotatably connected to the water turbine shaft 21 of the water turbine 2. The other end of the adjusting lever 3 is provided with a buoyancy plate 31 extending out of the open side of the housing 1. The blades 22 of the water turbine 2 are exposed outside the open side of the housing 1 as the buoyancy plate 31 swings.

[0029] The buoyancy plate automatically rises and falls according to the water level, causing the adjusting lever to swing, thus realizing the automatic adjustment of the water turbine's immersion depth. This allows the power generation device to reduce energy conversion and minimize the impact on the water flow when the flow rate in the pipe is low, while ensuring that the water turbine is always at the optimal immersion depth when the flow rate is high, thereby improving power generation efficiency.

[0030] In this embodiment, the housing 1 has adjustment grooves 11 on opposite sides, and the ends of the water turbine shaft 21 are slidably inserted into the adjustment grooves 11. The ends of the water turbine shaft 21 extending out of the housing 1 are connected to the input end of the rotor 41 for transmission.

[0031] The water turbine shaft can move up and down via a sliding groove, and the angle can be adjusted in conjunction with the adjusting lever structure. The sliding groove design increases the structural flexibility and ensures that the water turbine does not reduce efficiency due to jamming during operation.

[0032] In this embodiment, the sliding stroke of the water turbine shaft 21 in the adjusting groove 11 is arc-shaped, and the hinge point between the adjusting lever 3 and the housing 1 is set at its center.

[0033] The distance from each position to the hinge point in the arc stroke of the adjusting slide is the same, which conforms to the trajectory of the swing of the adjusting lever 3, which helps to maintain the stability of the output shaft and reduce mechanical stress.

[0034] The distance between the turbine shaft 21 and the rotor 41 varies with the position of the turbine 2, and the transmission between them requires the replacement of transmission components of other sizes or the use of transmission components with self-tensioning for connection.

[0035] In this embodiment, the adjusting lever 3 is divided into a long rod portion 32 and a short rod portion 33 on both sides at the hinge point with the housing 1. One end of the short rod portion 33 is rotatably connected to the water turbine shaft 21, and the part of the long rod portion 32 that extends out of the opening of the housing 1 is provided with a buoyancy plate 31.

[0036] A lever structure mechanism is formed, and changes in buoyancy cause the water turbine angle to adjust. The ratio of the long and short rods can be adjusted to control the sensitivity and amplitude of the response, thus achieving precise control.

[0037] Meanwhile, the longer rod 32 has a larger mass, and when the buoyancy plate 31 is not subjected to buoyancy, the adjusting lever 3 naturally tilts towards the longer rod 32, causing the water wheel 2 of the shorter rod 33 to leave the water flow and enter the shell 1.

[0038] In this embodiment, an elastic element 35 is provided on the housing 1 and connected to the adjusting lever 3. The elastic element 35 acts on the adjusting lever 3 to move the water turbine shaft 21 into the housing 1.

[0039] The elastic element 35, such as a spring or rubber band, can form an automatic reset or pre-tightening function to prevent structural dislocation when the buoyancy plate shakes too much, and can also cope with sudden changes such as a sudden drop in water level.

[0040] When the water level is low, the elastic element 35 forces the water turbine 2 back into the housing 1, suspending the water turbine from continuing to obtain water flow power under low water pressure, thereby ensuring the normal flow of water under low water pressure. When the water level is high, the buoyancy obtained by the buoyancy plate 31 is sufficient to counteract the elastic element 35 prying one end of the short rod 33, causing the water turbine 2 to descend and contact the water flow.

[0041] In this embodiment, a stator 42 is isolated inside the housing 1, and a rotor 41 is rotatably disposed in the stator 42 with its input end passing through the housing 1 to the outside.

[0042] The stator 42 is sealed within the housing 1, while the turbine shaft 21 and rotor 41 are connected externally to the housing 1 to prevent the internal water environment from affecting the operation of the stator and rotor. The generator is connected to an output line leading outside the housing 1, or the electricity can be stored inside the housing 1 via a battery.

[0043] In this embodiment, the open side of the housing 1 is provided with a pipe end cap 12 extending in all directions, so that the water turbine shaft 21 is located off the pipe axis.

[0044] The pipe end cap guides the direction of incoming water while maintaining water inlet stability. The off-center layout of the water impeller shaft is suitable for non-axial flow water impeller designs and is more conducive to installation in shallow waterways. Alternatively, the pipe end cap 12 can be omitted, and the impeller can be installed above an open waterway via a bracket. The height of the adjustable device allows the blades 22 to be fully submerged in the water when the impeller 2 swings down, and to be completely detached from the water flow when it swings up.

[0045] In this embodiment, a water baffle 13 is provided inside the housing 1, and the water baffle 13 is located between the water wheel 2 and the buoyancy plate 31.

[0046] The baffle plate prevents the water flow passing through the water turbine 2 from directly impacting the buoyancy plate, reducing the regulation failure caused by unstable water flow and improving the system's anti-disturbance performance.

[0047] like Figure 4 As shown, in this embodiment, a concave flow area 24 is provided on the water-facing surface of the blade 22, and the concave flow area 24 is distributed at the midpoint of the axial length of the water turbine 2.

[0048] Compared to an impeller 2 without a concave flow zone 24, water flowing over its straight blades 22 is more likely to be lost from both sides of the impeller 2 due to the velocity difference at the edges. The concave flow zone 24, with its concave structure, allows the blades 22 to trap more oncoming water, significantly improving the efficiency of water kinetic energy collection. Furthermore, the water kinetic energy is more concentrated at the midpoint, resulting in more even force distribution at both ends of the impeller 2 and reducing uneven wear caused by off-axis rotation.

[0049] Typically, the midpoint of the impeller 2 along its length is used as the axis of symmetry. The blades 22 on both sides are tilted so that the blades 22 form a V-shaped concave flow area 24, with the V-shaped opening facing the direction of water flow to receive the impact.

[0050] In this embodiment, the edge of the blade 22 is provided with an outwardly extending water-gathering baffle 25, and both sides of the blade 22 are provided with outwardly extending water-gathering baffles 25. The water-gathering baffles 25 are made of deformable materials such as rubber, and the side of the water-gathering baffle 25 away from the blade 22 does not exceed the axial end face of the water wheel 2.

[0051] When the blade 22 is pushed by the water flow, the water-collecting baffle 25 is impacted and deforms to both sides to increase the force-bearing area of ​​the blade 22, so that the impeller 2 can collect more kinetic energy per unit time. When the blade 22 leaves the water flow, the water-collecting baffle 25 is automatically reset by elastic force to avoid rubbing against the side wall of the water channel or the adjusting lever 3.

[0052] Furthermore, one edge of the water-collecting baffle 25 is fixed to the water-facing surface of the impeller 2, while the remaining part of the water-collecting baffle 25 is suspended in the air.

[0053] In waterways, pipes, or canals, guide pulleys 26 extending beyond the end face of the waterwheel 2 are provided on both sides of the blade 22. The guide pulleys 26 are connected to the blade 22 via, for example, a sliding rod with a spring or an elastic element using a spring sheet. When the blade 22 is pushed by the water flow on the lower side, the guide pulleys 26 slide against the side wall of the waterway as the waterwheel 2 rotates. This not only adapts to the width of the waterway and increases the stability of the waterwheel 2's rotation, but also prevents the edge of the blade 22 or the water-collecting baffle 25 from rubbing against the side wall.

[0054] Among them, the water-collecting baffle 25 gradually decreases in thickness from the connection with the blade 22, so that the near end of the water-collecting baffle 25 has sufficient support strength to withstand the impact of water flow, while the far end has more extensibility so that it expands to both sides to increase the area affected by water flow impact.

[0055] Example 2

[0056] The setting method of the adjusting slide in Embodiment 1 is changed. The sliding stroke of the water turbine shaft 21 in the adjusting slide 11 is arc-shaped and the rotor 41 shaft is set at its center.

[0057] Since the movement trajectory of the water turbine shaft 21 is centered on the rotor shaft 41, in order for the adjusting lever 3 to swing freely, the hinge point between the adjusting lever 3 and the housing 1 also needs to be set at the position of the rotor shaft 41. The adjusting lever 3 can be rotatably connected to the housing 1 through a bearing. The outer ring of the bearing is connected to the adjusting lever 3, while the inner ring is connected to the inner wall of the housing 1, allowing the rotor shaft 41 to pass through the inner ring without contact.

[0058] In this embodiment, a sleeve 34 that slides axially is fitted on the short rod 33, and the end of the sleeve 34 is rotatably connected to the water turbine shaft 21 through a bearing 23 provided on the water turbine shaft 21.

[0059] To avoid interference from the adjustment lever 3 on the rotation of the rotor 41, the hinge point of the adjustment lever 3 is set outside the rotor shaft of the rotor 41. However, since the center of the arc stroke of the adjustment groove is not on the hinge point of the adjustment lever, the distance from each position on the arc stroke to the hinge point changes with the swing angle. Therefore, the short rod can be lengthened accordingly through the sleeve.

[0060] The distance from each position on the corresponding arc stroke to the rotor shaft is the same, so that the distance between the water turbine shaft and the rotor shaft is fixed. The tension of the transmission belt or chain connecting the two does not change with the water turbine, and the transmission efficiency can be maintained without additional adjustment.

[0061] Example 3

[0062] like Figure 5 As shown, the structural form of the concave flow region 24 in Embodiment 1 is changed, and the water-facing surface of the blade 22 is set as an inwardly concave arc-shaped surface. The center of the arc is set at the midpoint of the length direction of the impeller 2. The arc-shaped surface has more impact area, and the impact kinetic energy can be more smoothly concentrated at the midpoint, so that the impeller 2 can rotate smoothly.

[0063] Example 4

[0064] Based on the above embodiments, a plurality of discretely arranged V-shaped plates are provided on the back of the blade 22. The arrangement direction is the height direction of the blade 22, and the opening of the V-shaped plates faces the side away from the blade 22. The advantage of this structure is that, according to the rotation direction, the blade 22 on the upper side of two adjacent blades 22 catches water and pours it onto the lower blade 22. The V-shaped plates on the back of the lower blade 22 are impacted by the poured water, thereby accelerating the rotation speed of the blade 22.

[0065] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An automatically adjustable power generation drive device, comprising a housing (1) and a water turbine (2) disposed within the housing (1), characterized in that, An adjusting lever (3) is hinged to the open side of the housing (1). One end of the adjusting lever (3) is rotatably connected to the water wheel shaft (21) of the water wheel (2). The other end of the adjusting lever (3) is provided with a buoyancy plate (31) extending out of the open side of the housing (1). The blades (22) of the water wheel (2) are exposed outside the open side of the housing (1) as the buoyancy plate (31) swings.

2. The automatically adjusting power generation drive device according to claim 1, characterized in that, The housing (1) has adjustment grooves (11) on both sides. The ends of the water turbine shaft (21) are slidably inserted into the adjustment grooves (11). The water turbine shaft (21) extends out of the housing (1) and is connected to the input end of the rotor (41) for transmission.

3. The automatically adjusting power generation drive device according to claim 2, characterized in that, The sliding stroke of the water turbine shaft (21) in the adjusting groove (11) is arc-shaped, and the hinge point between the adjusting lever (3) and the housing (1) is set at its center.

4. The automatically adjusting power generation drive device according to claim 2, characterized in that, The sliding stroke of the water turbine shaft (21) in the adjusting groove (11) is arc-shaped, and the rotor (41) shaft is set at its center.

5. The automatically adjusting power generation drive device according to claim 3 or 4, characterized in that, The adjusting lever (3) is divided into a long rod part (32) and a short rod part (33) on both sides at the hinge point with the housing (1). One end of the short rod part (33) is rotatably connected to the water turbine shaft (21), and the buoyancy plate (31) is provided on the part of the long rod part (32) that extends out of the opening of the housing (1).

6. The automatically adjusting power generation drive device according to claim 5, characterized in that, The short rod (33) is fitted with an axially sliding sleeve (34), and the end of the sleeve (34) is rotatably connected to the water turbine shaft (21) through a bearing (23) provided on the water turbine shaft (21).

7. The automatically adjusting power generation drive device according to claim 1, characterized in that, An elastic element (35) is provided on the housing (1) and connected to the adjusting lever (3). The elastic element (35) acts on the adjusting lever (3) to move the water turbine shaft (21) into the housing (1).

8. The automatically adjusting power generation drive device according to claim 1, characterized in that, A flow basin (24) is provided on the water-facing surface of the blade (22), and the flow basin (24) is located at the midpoint of the axial length of the water turbine (2).

9. The automatically adjusting power generation drive device according to claim 8, characterized in that, Water-gathering baffles (25) extending outward are provided on both sides of the blade (22), and the side of the water-gathering baffle (25) away from the blade (22) does not exceed the axial end face of the water wheel (2).

10. The automatically adjusting power generation drive device according to claim 1, characterized in that, A baffle plate (13) is provided inside the shell (1), and the baffle plate (13) is located between the water wheel (2) and the buoyancy plate (31).

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