Main and auxiliary waterwheel series connection shaft coupling device suitable for horizontal flow water power generation system

Abstract

The invention relates to a main and auxiliary waterwheel series coupling device suitable for a horizontal flow water power generation system, a main waterwheel shaft and an auxiliary waterwheel shaft are coaxially and oppositely arranged and are connected through a clutch type coupling, and a main waterwheel shaft coupling device and an auxiliary waterwheel shaft coupling device are cylindrical and respectively sleeve the opposite ends of the main waterwheel shaft and the auxiliary waterwheel shaft; the auxiliary waterwheel shaft coupling device and the auxiliary waterwheel shaft are in axial sliding fit and are relatively fixed in the circumferential direction, and the auxiliary waterwheel shaft is sleeved with a spring used for pushing the auxiliary waterwheel shaft coupling device to the main waterwheel shaft coupling device. The opposite end faces of the main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device are provided with meshing structures used for achieving forward joint and reverse separation. According to the coupling device, the clutch type coupler is adopted for connecting the main waterwheel shaft and the auxiliary waterwheel shaft, separation and combination are automatically achieved according to the operation requirement of the power generation system, the power generation efficiency of the power generation system is guaranteed, and repair and maintenance are convenient.

Description

Technical Field

[0001] The invention relates to a horizontal flow water power generation system, in particular to a main and auxiliary water wheel series coupling device suitable for the horizontal flow water power generation system, belonging to the technical field of water conservancy power generation equipment. Background Art

[0002] Hydropower generation has the characteristics of resource recycling, clean and environmental protection, and extensive resources. It is one of the best ways to generate electricity in the world. Horizontal water power generation uses the kinetic energy of natural water flow in the river. It belongs to low-flow hydropower generation. In order to achieve better energy utilization, two waterwheels can be connected in series to generate electricity. The main waterwheel is connected to the generator, and the auxiliary waterwheel is used to increase the power of the main waterwheel. The waterwheel shafts of the two waterwheels are fixedly connected by a coupling device (such as a coupling). However, the speed of natural water flow in the river varies greatly, and there is local turbulence. When large turbulence appears on the side of the auxiliary waterwheel, it is possible to cause the auxiliary waterwheel to reverse or the speed to be lower than the speed of the main waterwheel. At this time, the auxiliary waterwheel will offset the power of the main waterwheel and affect the power generation effect. In addition, the naturally existing river or water flow channel must keep the flow channel unobstructed. When the waterwheel needs to be repaired, since the waterwheel shafts of the two waterwheels are fixedly connected through a coupling device, both waterwheels need to be stopped to achieve maintenance. Stopping both waterwheels will block the water flow, which is easy to cause waterlogging upstream and poses a safety hazard. Manually unlocking the coupling device is a safety hazard because the coupling device is usually in the middle of the river. In addition, the coupling device cannot be unlocked manually because the force transmitted by the coupling device is very large and the speed is fast. If the coupling device is unlocked by hydraulic pushing, once the hydraulic oil leaks, it will pollute the water source. Therefore, the fixed coupling in the prior art is not suitable for connecting the main and auxiliary waterwheel shafts in this situation. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a main and auxiliary water wheel series coupling device suitable for a horizontal water power generation system, which can automatically realize the separation and connection of the main and auxiliary water wheel shafts according to the operation requirements of the power generation system.

[0004] The technical scheme for achieving the above-mentioned purpose of the present invention is: a main and auxiliary waterwheel series coupling device suitable for a horizontal water power generation system, the main waterwheel shaft and the auxiliary waterwheel shaft are coaxially arranged opposite to each other, a spacing is left between the two and they are connected by a clutch coupling, the clutch coupling includes a main waterwheel shaft coupling device and an auxiliary waterwheel shaft coupling device, the main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device are cylindrical, respectively sleeved on the opposite ends of the main waterwheel shaft and the auxiliary waterwheel shaft, the main waterwheel shaft coupling device is fixedly connected to the corresponding end of the main waterwheel shaft, the auxiliary waterwheel shaft coupling device is axially slidably matched with the auxiliary waterwheel shaft and circumferentially fixed relatively, the auxiliary waterwheel shaft is sleeved with a spring, one end of the spring is against or fixedly connected to the outer end surface of the auxiliary waterwheel shaft coupling device (the opposite sides of the two waterwheels are their respective inner sides, and the other side is their respective outer sides), The other end is abutted against or fixedly connected to the inner side surface of the auxiliary water wheel or fixedly arranged on the spring abutment device on the auxiliary water wheel shaft. The main water wheel shaft coupling device and the relative end faces of the auxiliary water wheel shaft coupling device are provided with matching meshing structures, and the meshing structure includes an outwardly protruding protrusion arranged on the corresponding end face of the main water wheel shaft coupling device (the protrusion is arranged circumferentially along the end face of the main water wheel shaft coupling device) and a groove conforming to the protrusion arranged on the corresponding end face of the auxiliary water wheel shaft coupling device. The side of the protrusion facing away from the rotation direction of the main water wheel in the circumferential direction is a plane (a plane perpendicular to the corresponding end face of the main water wheel shaft coupling device) or an inclined surface, the angle between the inclined surface and the end face of the main water wheel shaft coupling device is an acute angle, and the side of the protrusion facing the rotation direction of the main water wheel in the circumferential direction is an inclined surface.

[0005] Usually, the outer end of the main waterwheel shaft is connected to a generator set.

[0006] Preferably, the number of the meshing structures is one or several. When the number of the meshing structures is several, several of the meshing structures are evenly distributed along the circumferential direction on the main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device, that is, several of the protrusions are evenly distributed along the circumferential direction on the corresponding end faces of the main waterwheel shaft coupling device, and several of the grooves are evenly distributed along the circumferential direction on the corresponding end faces of the auxiliary waterwheel shaft coupling device.

[0007] Preferably, a matching axial sliding guide structure is provided between the inner wall of the auxiliary water wheel shaft coupling device and the outer wall of the auxiliary water wheel shaft.

[0008] Furthermore, the axial sliding guide structure preferably includes an axial slide rail arranged on the inner wall of the auxiliary water wheel shaft coupling device and an axial slide groove arranged on the outer wall of the auxiliary water wheel shaft and matching with the axial slide rail. The axial slide rail is slidably connected with the axial slide groove, and the axial slide groove is preferably a through groove.

[0009] Preferably, the main waterwheel shaft coupling device is key-connected to the main waterwheel shaft, and an axial limiting structure of the main waterwheel shaft coupling device is provided on the main waterwheel shaft.

[0010] Furthermore, the axial limiting structure is a radially outwardly protruding annular boss coaxially arranged on the main waterwheel shaft, the annular boss is located on the outside of the main waterwheel shaft coupling device, and the outer end surface of the main waterwheel shaft coupling device abuts against the annular boss.

[0011] Preferably, the spring is a cylindrical spring or a disc spring.

[0012] When the spring is in a natural state (uncompressed state), the auxiliary waterwheel shaft coupling device is engaged with the main waterwheel shaft coupling device through the engagement structure.

[0013] Preferably, the outer diameters of the opposite ends of the main waterwheel shaft and the auxiliary waterwheel shaft are the same.

[0014] Preferably, the inner and outer diameters of the main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device are the same.

[0015] Preferably, the auxiliary water wheel shaft coupling device is provided with a position maintaining mechanism after it slides outwardly relative to the auxiliary water wheel shaft.

[0016] Preferably, the position maintaining mechanism includes a flange and a positioning wheel, the flange is coaxially fixedly connected to the outer wall of the auxiliary water wheel shaft coupling device, the axis of the positioning wheel is arranged parallel to the axis of the auxiliary water wheel shaft coupling device, the positioning wheel and the flange are spaced apart in the radial direction, an annular groove is provided on the wheel surface of the positioning wheel along the circumferential direction, the groove width of the annular groove is greater than the width of the flange, and the positioning wheel is provided with a telescopic device toward the direction of the auxiliary water wheel shaft coupling device.

[0017] Preferably, the telescopic device comprises a jacking device and a positioning wheel arm, the jacking rod of the jacking device is fixedly connected to one end of the positioning wheel arm, and the other end of the positioning wheel arm is rotatably connected to the positioning wheel.

[0018] There are two positioning wheel arms, one end of each of which is fixedly connected to both sides of the top rod, and the positioning wheel is located between the other ends of the two positioning wheel arms and can be connected to the two positioning wheel arms through matching shafts and bearings.

[0019] Preferably, a position sensor for detecting the axial position of the auxiliary water wheel shaft coupling device is provided on the auxiliary water wheel shaft, and a signal output of the position sensor is connected to the control end of the jacking device.

[0020] Preferably, the groove wall of the annular groove facing the main water wheel is a slope inclined from outside to inside or the annular groove is a V-shaped groove.

[0021] The beneficial effects of the present invention are as follows: the coupling device of the present invention adopts a two-half split structure, and is engaged and connected through the engagement structure, and can automatically realize separation and combination (or docking) according to the operation requirements of the power generation system, ensuring the power generation efficiency of the power generation system and facilitating repair and maintenance. When the rotation trend of the auxiliary waterwheel is faster than the rotation trend of the main waterwheel, the auxiliary waterwheel shaft coupling device and the main waterwheel shaft coupling device are tightly matched through the side of the engagement structure facing away from the rotation direction of the waterwheel (matching planes or inclined surfaces with acute angles to the end faces of the coupling device), the auxiliary waterwheel pushes the main waterwheel to rotate synchronously with it, and the auxiliary waterwheel outputs power to the main waterwheel, so that the torque of the two waterwheels is transmitted to the generator set to generate electricity, thereby improving the power generation efficiency. When the rotation trend of the auxiliary waterwheel is slower than that of the main waterwheel (the auxiliary waterwheel has no power transmitted to the main waterwheel), the rotation trend of the main waterwheel shaft coupling device is faster than that of the auxiliary waterwheel shaft coupling device. Under the action of the side (inclined surface) sliding force of the meshing structure toward the rotation direction of the waterwheel, the auxiliary waterwheel shaft coupling device overcomes the thrust of the spring and slides outward. The auxiliary waterwheel shaft coupling device is disengaged from the main waterwheel shaft coupling device and can be kept disengaged by the position holding mechanism to avoid the auxiliary waterwheel offsetting the power of the main waterwheel and affecting the power generation efficiency. When it is necessary to repair the main waterwheel or the auxiliary waterwheel, the main waterwheel shaft coupling device can be disengaged from the auxiliary waterwheel shaft coupling device in an appropriate manner (for example, reducing the rotation trend of the auxiliary waterwheel), and then the waterwheel to be repaired is stopped for maintenance, and the other waterwheel runs normally to pass water, reducing the degree of obstruction to the water flow and avoiding upstream waterlogging.

[0022] The present invention is suitable for connecting the main and auxiliary water wheel shafts of a hydraulic power generation system provided with a main water wheel and an auxiliary water wheel, and can also be used for connecting two power shafts in other occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 is a schematic diagram of an embodiment of the meshing structure of the present invention; Figure 3 It is a schematic diagram of another embodiment of the meshing structure of the present invention. DETAILED DESCRIPTION

[0024] See also Figure 1-Figure 3The present invention discloses a main and auxiliary waterwheel series coupling device suitable for a horizontal water power generation system, which is mainly used for the coaxial connection of the waterwheel shafts of two waterwheels in the natural flow of river (abbreviated as horizontal water) power generation. The two waterwheels are respectively a main waterwheel and an auxiliary waterwheel. The main waterwheel shaft 1 and the auxiliary waterwheel shaft 2 are coaxially arranged opposite to each other, with a spacing between them, and the outer end of the main waterwheel shaft is connected to a generator set. The opposite ends of the main waterwheel shaft and the auxiliary waterwheel shaft are coaxially sleeved with a cylindrical coupling device, which can be a sleeve. The main waterwheel shaft coupling device 3 is fixedly connected to the corresponding end of the main waterwheel shaft, and the main waterwheel shaft coupling device rotates synchronously with the main waterwheel shaft. The auxiliary waterwheel shaft coupling device 4 is axially slidably matched with the auxiliary waterwheel shaft and is relatively fixed in the circumferential direction. The auxiliary waterwheel shaft coupling device rotates synchronously with the auxiliary waterwheel shaft and can slide axially relative to the auxiliary waterwheel shaft. A spring 5 is sleeved on the auxiliary water wheel shaft, and the spring is sleeved on the auxiliary water wheel shaft outside the auxiliary water wheel shaft coupling device (the opposite sides of the two water wheels are their respective inner sides, and the other side is their respective outer sides), one end of the spring abuts against or is fixedly connected to the outer end surface of the auxiliary water wheel shaft coupling device, and the other end abuts against or is fixedly connected to the inner side surface of the auxiliary water wheel or on a spring abutment device fixedly arranged on the auxiliary water wheel shaft. The main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device are provided with matching meshing structures on the relative end faces so that the two can be meshed and connected through the meshing structure, the meshing structure includes a protrusion protruding outward on the corresponding end face of the main waterwheel shaft coupling device (the protrusion is arranged circumferentially along the end face of the main waterwheel shaft coupling device) 6 and a groove 7 conforming to the protrusion on the corresponding end face of the auxiliary waterwheel shaft coupling device, the side of the protrusion facing away from the rotation direction of the main waterwheel in the circumferential direction is a plane (a plane perpendicular to the corresponding end face of the main waterwheel shaft coupling device) or an inclined surface, and the angle between the inclined surface and the end face of the main waterwheel shaft coupling device is an acute angle, the side of the protrusion facing the rotation direction of the main waterwheel in the circumferential direction is an inclined surface, and the angle between the inclined surface and the end face of the waterwheel shaft coupling device is an obtuse angle, and the auxiliary waterwheel shaft coupling device is provided with a position maintaining mechanism after it slides outward relative to the auxiliary waterwheel shaft.

[0025] The coupling device adopts a two-half split structure (the main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device), and is engaged and connected through the engaging structure. It can automatically achieve disengagement and combination (or docking, connection) according to the operating requirements of the power generation system, thereby ensuring the power generation efficiency of the power generation system and facilitating repair and maintenance.

[0026] When the rotation trend of the auxiliary water wheel is faster than that of the main water wheel, the auxiliary water wheel shaft coupling device and the main water wheel shaft coupling device are tightly matched through the side of the meshing structure facing away from the rotation direction of the water wheel (matching planes or inclined surfaces with acute angles to the end faces of the coupling devices), and the auxiliary water wheel pushes the main water wheel to rotate synchronously with it. The auxiliary water wheel outputs power to the main water wheel, so that the torque of the two water wheels is transmitted to the generator set to generate electricity, thereby improving the power generation efficiency. When the rotation trend of the auxiliary waterwheel is slower than that of the main waterwheel (the auxiliary waterwheel has no power transmitted to the main waterwheel), the rotation trend of the main waterwheel shaft coupling device is faster than that of the auxiliary waterwheel shaft coupling device. Under the action of the side (inclined surface) sliding force of the meshing structure toward the rotation direction of the waterwheel, the auxiliary waterwheel shaft coupling device overcomes the thrust of the spring and slides outward. The auxiliary waterwheel shaft coupling device is disengaged from the main waterwheel shaft coupling device and can be kept disengaged by the position holding mechanism to avoid the auxiliary waterwheel offsetting the power of the main waterwheel and affecting the power generation efficiency. When it is necessary to repair the main waterwheel or the auxiliary waterwheel, the main waterwheel shaft coupling device can be disengaged from the auxiliary waterwheel shaft coupling device in an appropriate manner (for example, reducing the rotation trend of the auxiliary waterwheel), and then the waterwheel to be repaired is stopped for maintenance, and the other waterwheel runs normally to pass water, reducing the degree of obstruction to the water flow and avoiding upstream waterlogging.

[0027] The number of the meshing structures may be one or several (for example, two or three), preferably several. When the number of the meshing structures is several (including several protrusions and grooves of the same number), several of the meshing structures are evenly distributed along the circumference on the main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device, that is, several of the protrusions are evenly distributed along the circumference on the corresponding end faces of the main waterwheel shaft coupling device, and several of the grooves are evenly distributed along the circumference on the corresponding end faces of the auxiliary waterwheel shaft coupling device, so that when the main waterwheel shaft coupling device is meshed and connected with the auxiliary waterwheel shaft coupling device, the force and torque are evenly transmitted during synchronous rotation.

[0028] Preferably, a matching axial sliding guide structure is provided between the inner wall of the auxiliary waterwheel shaft coupling device and the outer wall of the auxiliary waterwheel shaft, so that the auxiliary waterwheel shaft coupling device and the auxiliary waterwheel shaft can slide relative to each other in the axial direction and be relatively fixed in the circumferential direction. Preferably, the axial sliding guide structure includes an axial slide rail provided on the inner wall of the auxiliary waterwheel shaft coupling device and an axial slide groove provided on the outer wall of the auxiliary waterwheel shaft and matching with the axial slide rail, wherein the axial slide rail is slidably connected with the axial slide groove, and the axial slide groove is preferably a through groove. Such a configuration can realize the axial sliding between the auxiliary waterwheel shaft coupling device and the auxiliary waterwheel shaft, and the circumferential relative fixation between the two can be realized, and the relative movement of the spring on the auxiliary waterwheel shaft is not affected. The number of the axial sliding guide structures can be several, and the several axial sliding guide structures are evenly distributed along the circumferential direction on the auxiliary waterwheel shaft coupling device and the auxiliary waterwheel shaft. The axial sliding guide structure can also adopt any matching structure suitable for axial relative sliding between the shaft and the sleeve under the existing technology.

[0029] The main waterwheel shaft coupling device and the main waterwheel shaft can be key-connected to achieve relative fixation between the two in the circumferential direction. The main waterwheel shaft is provided with an axial limiting structure of the main waterwheel shaft coupling device, which is used to limit the axial position of the main waterwheel shaft coupling device on the main waterwheel shaft. The axial limiting structure can be a radially outwardly protruding annular boss or annular flange coaxially arranged on the main waterwheel shaft. The annular boss or annular flange is located on the outside of the main waterwheel shaft coupling device, and the outer end face of the main waterwheel shaft coupling device abuts against the annular boss or annular flange. Such a configuration facilitates the assembly and disassembly of the main waterwheel shaft coupling device on the main waterwheel shaft. The main waterwheel shaft coupling device and the main waterwheel shaft can also be connected in a fixed connection manner by welding.

[0030] The spring is preferably a cylindrical spring or a disc spring, which is convenient for being mounted on the auxiliary waterwheel shaft, and the force and external force when elastic deformation occurs are uniform. When the spring is in a natural state (uncompressed state), the auxiliary waterwheel shaft coupling device and the main waterwheel shaft coupling device are meshed through the meshing structure.

[0031] The outer diameters of the opposite ends of the main waterwheel shaft and the auxiliary waterwheel shaft are preferably the same, and the inner and outer diameters of the main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device are preferably the same, so as to facilitate the meshing connection and relative disengagement between the two.

[0032] The position holding mechanism preferably includes a flange 8 and a positioning wheel 9, the flange is coaxially fixedly connected to the outer wall of the auxiliary water wheel shaft coupling device, the axis of the positioning wheel is arranged parallel to the axis of the auxiliary water wheel shaft coupling device, and a radial distance is left between the positioning wheel and the flange, and an annular groove is provided on the wheel surface of the positioning wheel along the circumferential direction, and the groove width of the annular groove is greater than the width of the flange, so that the outer edge of the flange can be inserted into the annular groove, and the positioning wheel is provided with a telescopic device toward the direction of the auxiliary water wheel shaft coupling device, and the positioning wheel can be driven to approach or move away from the auxiliary water wheel coupling device through the telescopic device. When the auxiliary waterwheel shaft coupling device is disengaged from the main waterwheel shaft coupling device, the telescopic device can be controlled to drive the positioning wheel close to the auxiliary waterwheel shaft coupling device, so that the outer edge of the flange is inserted into the annular groove on the positioning wheel, and the axial position of the auxiliary waterwheel shaft coupling device on the auxiliary waterwheel shaft is limited, so that the auxiliary waterwheel shaft coupling device and the main waterwheel shaft coupling device always remain in a disengaged state and do not rub against each other. When the auxiliary waterwheel shaft coupling device is required to be meshed and connected with the main waterwheel shaft coupling device, the telescopic device is controlled to drive the positioning wheel away from the auxiliary waterwheel shaft coupling device (or reset), and the outer edge of the flange is disengaged from the annular groove on the positioning wheel. The auxiliary waterwheel shaft coupling device moves toward the main waterwheel shaft coupling device under the thrust of the spring, and finally meshes and connects with the main waterwheel shaft coupling device.

[0033] A preferred embodiment of the telescopic device is as follows: the telescopic device includes a jacking device 10 and a positioning wheel arm 11, the jacking device can be fixedly mounted on the bearing base of the waterwheel, the jacking device's jack rod 12 is fixedly connected to one end of the positioning wheel arm (for example, bolted), and the other end of the positioning wheel arm is rotationally connected to the positioning wheel (for example, with a shaft hole with a small gap). The jacking device is used to realize the movement (approaching or moving away) of the positioning wheel relative to the auxiliary waterwheel shaft coupling device, and the positioning wheel arm is rotationally connected to the positioning wheel, so that when the positioning wheel approaches the auxiliary waterwheel shaft coupling device and the outer edge of the flange is inserted into the annular groove on the positioning wheel, the positioning wheel and the flange / the auxiliary waterwheel shaft coupling device can rotate relative to each other, and will not hinder the rotation of the auxiliary waterwheel shaft / the auxiliary waterwheel. There are two positioning wheel arms, one end of each of which is fixedly connected to both sides of the top rod and can be connected by bolts. The positioning wheel is located between the other ends of the two positioning wheel arms and can be connected to the two positioning wheel arms by matching shafts and bearings.

[0034] The groove wall of the annular groove facing the direction of the main waterwheel is preferably an inclined surface inclined from the outer edge of the positioning wheel to the center from the outside to the inside, or the annular groove is a V-shaped groove. In this way, when the positioning wheel is close to the auxiliary waterwheel shaft coupling device and the annular groove on the positioning wheel just contacts the outer edge of the flange, under the sliding push of the inclined groove wall of the annular groove facing the direction of the main waterwheel (the groove wall of the V-shaped groove in this direction is also an inclined groove wall) on the flange, the flange will drive the auxiliary waterwheel shaft coupling device to slide outwards relative to the auxiliary waterwheel shaft for a certain distance, so as to avoid that when the auxiliary waterwheel shaft coupling device is disengaged from the main waterwheel shaft coupling device, the main waterwheel shaft coupling device cannot completely overcome the thrust of the spring due to the insufficient force of the main waterwheel shaft coupling device on the auxiliary waterwheel shaft coupling device, resulting in the inability to completely disengage the auxiliary waterwheel shaft coupling device from the main waterwheel shaft coupling device.

[0035] The auxiliary waterwheel shaft is preferably provided with a position sensor (not shown in the figure) for detecting the axial position of the auxiliary waterwheel shaft coupling device, and the signal output of the position sensor is connected to the control end of the jacking device. In this way, the automatic control of the movement of the positioning wheel relative to the auxiliary waterwheel shaft coupling device can be realized. When the auxiliary waterwheel shaft coupling device is disengaged from the main waterwheel shaft coupling device, the auxiliary waterwheel shaft coupling device slides outward relative to the auxiliary waterwheel shaft, and the position sensor collects the position signal of the auxiliary waterwheel shaft coupling device and transmits the signal to the control end of the jacking device (which can be provided with a suitable controller, such as a PLC or an industrial computer), controls the action of the jacking device, pushes the positioning wheel to move toward the auxiliary waterwheel shaft coupling device, and inserts the outer edge of the flange into the annular groove on the positioning wheel, thereby limiting the axial position of the auxiliary waterwheel shaft coupling device on the auxiliary waterwheel shaft. The reset of the positioning wheel can be directly controlled by the controller when appropriate (for example, when the rotation speed of the auxiliary waterwheel is greater than the rotation speed of the main waterwheel). The setting position of the position sensor on the auxiliary water wheel shaft, the telescopic movement distance of the positioning wheel and the control method of the controller can be flexibly set according to the automatic control means under the existing technology.

[0036] Unless otherwise specified or one preferred or optional technical means is a further limitation of another technical means, all preferred and optional technical means disclosed in the present invention can be arbitrarily combined to form several different technical solutions.

Claims

1. A main and auxiliary waterwheel series coupling device suitable for a horizontal water power generation system, characterized in that The main waterwheel shaft and the auxiliary waterwheel shaft are coaxially arranged opposite to each other, with a spacing between them and connected by a clutch coupling, the clutch coupling comprising a main waterwheel shaft coupling device and an auxiliary waterwheel shaft coupling device, the main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device are cylindrical, respectively sleeved on the opposite ends of the main waterwheel shaft and the auxiliary waterwheel shaft, the main waterwheel shaft coupling device is fixedly connected to the corresponding ends of the main waterwheel shaft, the auxiliary waterwheel shaft coupling device is axially slidably matched with the auxiliary waterwheel shaft and circumferentially relatively fixed, a spring is sleeved on the auxiliary waterwheel shaft, one end of the spring abuts against or is fixedly connected to the outer end face of the auxiliary waterwheel shaft coupling device, and the other end abuts against or is fixedly connected Connected to the inner side surface of the auxiliary water wheel or fixed on the spring abutment device on the auxiliary water wheel shaft, matching meshing structures are provided on the relative end faces of the main water wheel shaft coupling device and the auxiliary water wheel shaft coupling device, and the meshing structure includes an outwardly protruding protrusion provided on the corresponding end face of the main water wheel shaft coupling device and a groove conforming to the protrusion provided on the corresponding end face of the auxiliary water wheel shaft coupling device, the side of the protrusion facing away from the rotation direction of the main water wheel in the circumferential direction is a plane or an inclined surface, the angle between the inclined surface and the end face of the main water wheel shaft coupling device is an acute angle, and the side of the protrusion facing the rotation direction of the main water wheel in the circumferential direction is an inclined surface.

2. The main and auxiliary waterwheel series coupling device adapted to the horizontal water power generation system according to claim 1 is characterized in that The number of the meshing structures is one or more, and the meshing structures are evenly distributed along the circumferential direction on the main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device.

3. The main and auxiliary waterwheel series coupling device adapted to the horizontal water power generation system according to claim 1 is characterized in that A matching axial sliding guide structure is provided between the inner wall of the auxiliary water wheel shaft coupling device and the outer wall of the auxiliary water wheel shaft.

4. The main and auxiliary waterwheel series coupling device adapted to the horizontal water power generation system according to claim 1 is characterized in that The main waterwheel shaft coupling device is key-connected to the main waterwheel shaft, and an axial limiting structure of the main waterwheel shaft coupling device is provided on the main waterwheel shaft.

5. The main and auxiliary waterwheel series coupling device adapted to the horizontal water power generation system according to claim 1 is characterized in that The spring is a cylindrical spring or a disc spring.

6. The main and auxiliary waterwheel series coupling device adapted to the horizontal water power generation system according to claim 1, characterized in that The inner and outer diameters of the main waterwheel shaft coupling device and the auxiliary waterwheel shaft coupling device are the same.

7. A main and auxiliary waterwheel series coupling device adapted to a horizontal water power generation system according to any one of claims 1 to 6, characterized in that The auxiliary water wheel shaft coupling device is provided with a position maintaining mechanism after the auxiliary water wheel shaft slides outwardly relative to the auxiliary water wheel shaft.

8. The main and auxiliary waterwheel series coupling device adapted to the horizontal water power generation system according to claim 7, characterized in that The position holding mechanism includes a flange and a positioning wheel, the flange is coaxially fixedly connected to the outer wall of the auxiliary water wheel shaft coupling device, the axis of the positioning wheel is arranged parallel to the axis of the auxiliary water wheel shaft coupling device, the positioning wheel and the flange are spaced apart in the radial direction, an annular groove is circumferentially provided on the wheel surface of the positioning wheel, the notch width of the annular groove is greater than the width of the flange, and the positioning wheel is provided with a telescopic device toward the direction of the auxiliary water wheel shaft coupling device.

9. The main and auxiliary waterwheel series coupling device adapted to the horizontal water power generation system according to claim 8, characterized in that The groove wall of the annular groove facing the main water wheel is a slope inclined from outside to inside or the annular groove is a V-shaped groove.

10. The main and auxiliary waterwheel series coupling device adapted to the horizontal water power generation system according to claim 8, characterized in that A position sensor for detecting the axial position of the auxiliary water wheel shaft coupling device is provided on the auxiliary water wheel shaft, and a signal output of the position sensor is connected to the control end of the jacking device.

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