Bend-tube runner and multi-nozzle turbine

Abstract

The present invention discloses a curved pipe runner, comprising a circular runner housing, a circular inner drum with an axial hole sleeved in the runner housing, and a plurality of curved pipes; the runner housing is coaxial with the inner drum; the curved pipe comprises an inlet section and an outlet section; the plurality of curved pipes are evenly and fixedly arranged between the runner housing and the inner drum at the same angle to the vertical direction, the water inlets of the water inlet sections of the plurality of curved pipes are arranged in the same direction along the loop where the plurality of curved pipes are located, the water inlet sections of the curved pipes are arranged above the outlet section, and the water inlet section and the outlet section of the curved pipes are both arranged obliquely. The present invention also discloses a multi-nozzle water turbine with the above curved pipe runner. The runner and the water turbine of the present invention have a simple structure, a small footprint, strong adaptability, and are applicable to water heads above 10 m. Most water flows of the curved pipe multi-nozzle water turbine can perform repeated impact work for different times, thereby improving work efficiency and achieving a high electric energy conversion rate.

Description

Technical Field

[0001] The invention relates to a bent-tube runner and a multi-nozzle water turbine thereof, belonging to the technical field of hydraulic power generation machinery. Background Art

[0002] With the development of global industrialization, people's living standards are constantly improving, and energy issues are gradually becoming prominent. The development of clean and renewable energy is an inevitable trend in human development needs. However, building dams is extremely expensive, and available water resources are bound to be limited. Developing a high-efficiency turbine is both economical and can make good use of limited water resources. It is the best way for people to solve electricity problems.

[0003] At present, the impulse turbines on the market are divided into bucket type, oblique impact type and double impact type. They each have their own shortcomings, all of which are inefficient and have limited adaptability. The double impact type turbine first impacts the upper blades, and then acts on the lower blades of the runner for secondary energy exchange, repeatedly double impacting to do work, but in general, the efficiency is low, and the application head is used in small power stations below 60m. The blade length of the oblique impact turbine accounts for two-thirds of the runner radius, and the impact surface is too wide. After the high-pressure jet hits the blades, it quickly disperses and is discharged from the bottom. This design is also inefficient. Although the efficiency of the tangential impact turbine is better than that of the double impact and oblique impact types, the vertical shaft type can only install one runner, and the nozzle can only be used for a maximum of six for various reasons. After the water impact bucket is processed, there is still a small amount of energy that has not been used for the second time. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a turbine that combines the advantages of bucket-type, oblique-impact and double-impact turbines to solve the problems of low efficiency, limited adaptability and failure to fully collect water flow energy existing in the prior art turbines.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] The curved pipe runner includes a circular runner housing, a circular inner drum with an axial hole sleeved in the runner housing, and a plurality of curved pipes; the runner housing is coaxial with the inner drum; the curved pipe includes a water inlet section and a water outlet section; a plurality of curved pipes are evenly and fixedly arranged between the runner housing and the inner drum at the same angle to the vertical direction, the water inlets of the water inlet sections of the curved pipes are arranged in the same direction along the loop where the plurality of curved pipes are located, the water inlet section of the curved pipes is arranged above the water outlet section, and the water inlet section and the water outlet section of the curved pipes are both arranged obliquely. By arranging a curved pipe in the runner, the nozzle used in conjunction with the runner is directly opposite to the water inlet of the water inlet section, and the high-pressure jet ejected from the nozzle is ejected through the water inlet section to the upper end of the water outlet section of the curved pipe to rotate the runner, thereby driving the water turbine to do work.

[0007] By replacing the blades in the existing turbine with a curved pipe, the high-pressure jet enters the impact drum from the water inlet section. The straightness in the water inlet section can ensure that the jet does not disperse, and the impact force is concentrated and efficient. When working, the high-pressure jet of a nozzle can only be concentrated on one curved pipe or between two curved pipes. Multiple nozzles are used on the same runner without affecting each other.

[0008] Furthermore, the water inlet section of the elbow is at an angle of 60°-70° to the vertical direction. The water inlet section of the elbow and the nozzle within this angle range are easy to cooperate with each other.

[0009] Furthermore, the water inlet section and the water outlet section of the elbow are at an angle of 80°-90°. By setting the angle between the water inlet section and the water outlet section of the elbow and the angle between the water inlet section and the vertical direction, the power generation of the turbine can be effectively improved, and the various components can be used in coordination with each other.

[0010] Furthermore, the corner of the elbow is rounded; a plurality of rollers are arranged at the corner of the elbow, and the plurality of rollers are arranged on the inner wall of the outer rounded corner of the corner and opposite to the water inlet of the water inlet section. Four rollers are arranged at the corner of the elbow from top to bottom, and the high-pressure jets sprayed from the nozzles directly hit the four rollers, so that the runners rotate and work. After the water hits the rollers, the four rollers rotate freely and arbitrarily without direction, and the impacted surface is increased, which can extend the service life of the elbow.

[0011] Furthermore, the upper edge of the water inlet of the curved pipe water inlet section is higher than the inner drum plate. After the height of the water inlet is slightly increased, it is convenient for the nozzle and the water inlet of the curved pipe water inlet section to cooperate with each other.

[0012] The present invention also relates to a curved pipe multi-nozzle water turbine, comprising the above-mentioned impeller, a fixed impeller shaft, a rotating shaft, a pulley, a belt, a plurality of nozzles connected to a plurality of water diversion pipes and a generator; the impeller is movably sleeved on the impeller shaft through an inner drum; the rotating shaft is vertically arranged parallel to the impeller shaft, the pulley is fixedly sleeved on the rotating shaft, and the pulley is connected to the impeller housing through a belt; the rotating shaft is connected to the input shaft of the generator through a belt; the nozzle is arranged above the curved pipe and is directly opposite to the water inlet of the curved pipe water inlet section, and the high-pressure jet ejected by the nozzle is parallel to the curved pipe water inlet section; the high-pressure jet is ejected toward the curved pipe through the nozzle to drive the impeller to rotate on the impeller shaft, thereby driving the pulley and the rotating shaft to rotate, thereby driving the generator to generate electricity.

[0013] Furthermore, a waterproof ring extending upward is provided at the upper end of the rotor housing, and the upper edge of the waterproof ring is higher than the water inlet of the elbow water inlet section. The provision of the waterproof ring can effectively prevent the high-pressure jet sprayed from the nozzle from splashing and affecting the normal operation of the equipment.

[0014] Furthermore, a plurality of waterproof strips are provided on the inner wall of the waterproof ring to prevent water from splashing. The waterproof strips cooperate with the waterproof ring to prevent water from splashing outwards under the action of centrifugal force.

[0015] Furthermore, there are several wheels, all of which are movably sleeved on the wheel shaft; the number of pulleys is the same as that of wheels, and they are matched with the wheels respectively; the outer diameters of the several wheels arranged on the wheel shaft increase layer by layer from top to bottom to form a tower; the bottoms of the other wheels except the bottom wheel are all provided with serrated water diversion plates, and the circular edges of the inner drums of the other wheels except the top wheel are evenly provided with several drainage holes; the water diversion plates are arranged along the inner surface of the lower part of the circular wheel shell, and the serrations thereof are arranged obliquely downward and extend out of the wheel shell; arc-shaped tile-shaped cotyledons are obliquely arranged in the drainage holes The sub-blades are arranged obliquely in the rotation direction of the runner, the upper part of which extends out of the drainage hole, and the arc opening is opposite to the rotation direction of the runner; the water diversion blades of the upper runner are directly opposite to the sub-blades of the adjacent lower runner, and the bottom of the runner shell of the upper runner is flush with or lower than the top of the waterproof ring of the lower runner; a plurality of nozzles are arranged on each runner layer, which are opposite to the curved pipes in the runner layer; high-pressure jets are sprayed to the curved pipes through the nozzles to drive a plurality of runners to rotate on the runner shaft, thereby driving a plurality of pulleys and the rotating shaft to rotate, thereby driving the generator to generate electricity.

[0016] A plurality of runners are movably connected to the runner shaft by bearings in sequence along the axial direction of the runner shaft, a plurality of pulleys are fixedly sleeved in sequence along the axial direction of the rotating shaft, and the upper end and the lower end of the rotating shaft can be connected to the generator respectively. The water diversion plate is in the shape of a band saw, and the sawtooth portion of the water diversion plate is arranged below the outer shell of the runner, and the sawtooth thereof is slightly curled inward. After the water flow is discharged from the lower end of the curved pipe, a small amount of energy is still left, and it flows through the water diversion plate. Under the combined action of the gravity of the water and the centrifugal force when the runner rotates, the water is discharged obliquely downward in the direction of rotation of the runner in front, and impacts the sub-blades on the next runner again, and repeats the work for the second time. The water impacting the sub-blades flows from the drainage hole of the inner drum to the water diversion plate and meets the water flowing out of the water outlet section of the curved pipe after the work is impacted by the runner by several other nozzles. Under the combined action of the gravity of the water and the centrifugal force of the runner rotation, the water flows through the water diversion plate, and the water flows obliquely downward in the direction of rotation of the runner through the water diversion plate to the sub-blades of the adjacent lower runner. The water-guiding blades of the upper runner are directly opposite to the sub-blades of the lower runner, the curved pipe is connected to the outer side of the inner drum, and the sub-blades are arranged on the edge of the inner drum plane to form two inner and outer rings. This structure separates the nozzle impact of the runner and the water-guiding blade water impact without interfering with each other, effectively utilizes the energy of the water flow, and improves the power generation efficiency.

[0017] Furthermore, the serrations of the water diverter plate are oblique. Through the design of oblique serrations, the water flow led out by the water diverter plate can be directed directly toward the sub-blades on the lower runner, reducing the consumption of water diversion energy by the water diverter plate, making the water flow energy led out by the water diverter plate higher and increasing the power generation.

[0018] Furthermore, the sub-blades are at an angle of 40°-60° with the vertical direction. By setting this angle, they can be better coordinated with the saw teeth of the water diversion plate, thereby increasing the power generation.

[0019] Furthermore, a water diversion ring is arranged on the lower surface of the inner drum, and the water diversion ring is in the shape of a trumpet with a small top and a large bottom, and its upper end is fixedly arranged on the inner side of a plurality of drainage holes on the inner drum, and its lower end is adjacent to the upper part of the water diversion plate. The water that strikes the sub-blades flows from the drainage holes of the inner drum through the water diversion ring, and then flows from the water diversion ring to the water diversion plate, and after merging with the water that flows out of the water outlet section of the elbow after the other plurality of nozzles strike the runner to do work, it strikes the sub-blades of the next runner through the water diversion plate.

[0020] Furthermore, the plurality of pulleys are connected to the rotating wheels on the same horizontal plane with belts. The diameters of the plurality of pulleys are the same, and the diameters of the plurality of rotating wheels increase from top to bottom, and the plurality of pulleys are connected to the rotating wheels on the same horizontal plane with belts. In this way, the rotating wheel speed can be gradually reduced downward, and this design can better exert the impact force of the water flow drawn out by the water diversion plate to do repeated work.

[0021] Furthermore, the nozzles of each runner are symmetrically distributed on the left and right sides, so that the runner is more evenly stressed. The top runner of a reservoir with low head and large flow can be equipped with 15-20 nozzles, and the number of nozzles used by the following layers of runners is gradually reduced by 10% of the number of nozzles of the top runner. Under certain working conditions, the efficiency of the turbine is proportional to the number of nozzles. Increasing the number of nozzles can greatly improve the working efficiency. The use data shows that the power generation efficiency of the tower turbine using the present invention is 1.3-1.5 times that of the existing turbine.

[0022] Furthermore, the curved pipe multi-nozzle water turbine also includes a water diversion trough and a drainage trough. The water diversion trough is connected to the nozzle through a water diversion pipe, and the drainage trough is arranged below the bottom runner to discharge the water flow passing through the water turbine.

[0023] Furthermore, there are four runners. From top to bottom, the number of nozzles of the second runner is 90% of the number of nozzles of the first runner, the number of nozzles of the third runner is 80% of the number of nozzles of the first runner, and the number of nozzles of the fourth runner is 70% of the number of nozzles of the first runner, and the number of nozzles decreases step by step downward. The water sprayed from the first three runner nozzles has three, two, and one repeated impact opportunities. After the last tail runner is finished, the water is discharged from the drainage trough, and the entire work is completed.

[0024] Furthermore, the water turbine is also provided with a shell, which can effectively protect the entire water turbine from external interference.

[0025] The water turbine of the present invention can achieve the purpose of matching the rotating speed of the runner with that of the generator by adjusting the size of the pulley without a speed regulator. The purpose of matching the rotating speed of the runner with that of the generator can also be achieved by switching the number of nozzles. The structure is simple, the adjustment is convenient, and the use is convenient.

[0026] Working principle of the present invention:

[0027] When the curved pipe multi-nozzle water turbine of the present invention is in working state, the high-pressure jet of water sprayed from the nozzle directly hits the upper section of the water outlet section of the curved pipe. After the first energy conversion, there is still a small amount of energy. The water flows out from the lower end of the curved pipe and flows through the water guide plate. Under the combined action of the force generated by the water's own weight and the centrifugal force when the runner rotates, the water is ejected obliquely downward in the direction of rotation of the runner, and hits the next runner again, and repeats the work for the second time. By analogy, the water sprayed from the nozzles of different upper runners has different times of repeated impact opportunities. The number of nozzles on the runner decreases from top to bottom step by step by 10% of the number of nozzles on the top runner. Combined with the above different repeated impact opportunities of water, the work efficiency of each runner is almost the same.

[0028] The curved pipe type multi-nozzle water turbine uses several water diversion pipes to connect several nozzles separately, which can ensure the stability of water pressure. The high-pressure jet sprayed from the nozzle directly hits the roller at the upper end of the curved pipe outlet section. The runner rotates forward at an angle, and the high-pressure jet enters from the water inlet of the adjacent curved pipe inlet section and directly hits the roller of the adjacent curved pipe. The runner rotates forward at another angle, and so on. The runner keeps rotating forward to drive the generator to generate electricity. The high-pressure jet sprayed from the same nozzle can only hit one curved pipe or the area between two curved pipes. This design concentrates the high-pressure shooting and has a strong impact force. Multiple nozzles installed on the same runner do not affect each other. Multiple runners are installed on the same runner shaft. The number of runners increases exponentially, and the number of nozzles increases. The water turbine of the present invention is unique and exquisite. The water flow designed to impact the four runners has the opportunity to repeatedly impact and work three times, twice, or once.

[0029] Compared with the prior art, the present invention has the following effects:

[0030] 1. The runner and the turbine of the present invention have a simple structure, a small footprint, strong adaptability, and are applicable to water heads above 10 m.

[0031] 2. It realizes the idea that the current vertical impulse turbine does not have multiple impellers on the same shaft and the same impeller does not have 15-20 nozzles at the same time.

[0032] 3. Other products only have the double-click type that can perform the second impact work after the first impact work. Most water flows of the curved tube multi-nozzle turbine can perform repeated impact work for varying numbers of times.

[0033] 4. Through the effective combination of one nozzle and one water diversion pipe, multiple nozzles, and multiple runners with different repeated impacts, the efficiency of the water turbine of the present invention is doubled, especially for reservoirs with low head and large flow, the beneficial effect of the curved pipe multi-nozzle water turbine can be more reflected. Compared with other water turbines at the same head height and the same water consumption, the efficiency is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The contents expressed in the drawings of the specification and the symbols in the drawings are briefly explained:

[0035] Figure 1 It is a schematic diagram of the structure of the elbow;

[0036] Figure 2 is a three-dimensional diagram of a rotating wheel of Embodiment 1;

[0037] Figure 3 is a three-dimensional diagram of a water turbine of Embodiment 2;

[0038] Figure 4 It is a structural schematic diagram of a water turbine in Embodiment 2;

[0039] Figure 5 It is a schematic diagram of the structure of the second or third layer of the rotating wheel in the second embodiment;

[0040] Figure 6 for Figure 5 A top view of

[0041] Figure 7 This is a schematic diagram of the structure of the second and third layers of rotating wheels cooperating with each other in the second embodiment;

[0042] In the figure: 1 is a rotor, 2 is a rotor shell, 3 is an inner drum, 4 is a curved pipe, 41 is a water inlet section, 42 is a water outlet section, 43 is a roller, 5 is a waterproof ring, 6 is a waterproof strip, 7 is a rotor shaft, 8 is a rotating shaft, 9 is a pulley, 10 is a belt, 11 is a water diversion pipe, 12 is a nozzle, 13 is a generator, 14 is a water diversion sheet, 15 is a drainage hole, 16 is a sub-blade, 17 is a water diversion trough, and 18 is a drainage trough. DETAILED DESCRIPTION

[0043] The present invention is further described below with reference to a non-limiting embodiment of the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.

[0044] Embodiment 1

[0045] like Figure 1 , 2 As shown, the curved pipe runner 1 includes a circular runner housing 2, a circular inner drum 3 with an axial hole sleeved in the runner housing 2, and a plurality of curved pipes 4; the runner housing 2 is coaxial with the inner drum 3; the curved pipe 4 includes a water inlet section 41 and a water outlet section 42; Figure 2 , 4As shown, a plurality of curved pipes 4 are evenly and fixedly arranged between the runner housing 2 and the inner drum 3 at the same angle to the vertical direction, the water inlets of the water inlet sections 41 of the plurality of curved pipes 4 are arranged in the same direction along the loop line where the plurality of curved pipes 4 are located, the water inlet section 41 of the curved pipe 4 is arranged above the water outlet section 42, and the water inlet section 41 and the water outlet section 42 of the curved pipe 4 are both arranged obliquely. By arranging the curved pipe 4 in the runner 1, the nozzle 12 used in conjunction with the runner 1 is directly opposite to the water inlet of the water inlet section 41, and the high-pressure jet ejected from the nozzle 12 is ejected through the water inlet section 41 to the upper end of the water outlet section 42 of the curved pipe 4 to rotate the runner 1, thereby driving the turbine to work. The water inlet section 41 of the curved pipe 4 is at an angle of 60°-70° to the vertical direction. The water inlet section 41 and the water outlet section 42 of the curved pipe 4 are at an angle of 80°-90°. The corner of the curved pipe 4 is rounded; a plurality of rollers 43 are arranged at the corner of the curved pipe 4, and the plurality of rollers 43 are arranged on the inner wall of the outer rounded corner of the corner and opposite to the water inlet of the water inlet section 41. The upper edge of the water inlet of the water inlet section 41 of the curved pipe 4 is higher than the inner drum 3. A waterproof ring 5 extending upward is arranged at the upper end of the rotating wheel housing 2, and the upper edge of the waterproof ring 5 is higher than the water inlet of the water inlet section 41 of the curved pipe 4. A plurality of waterproof strips 6 are arranged on the inner wall of the waterproof ring 5 to prevent water from splashing. The waterproof strips 6 cooperate with the waterproof ring 5 to prevent water from splashing outward under the action of centrifugal force.

[0046] When in use, the runner 1 is set on the runner shaft 7 through the inner drum 3, and the water drained through the drainage pipe forms a high-pressure jet after passing through the nozzle 12. The high-pressure jet is injected into the curved pipe 4 of the runner 1, thereby rotating the runner 1. The curved pipe 4 of this embodiment adopts a rounded curved pipe 4, and a roller 43 is set at the corner of the curved pipe 4, thereby reducing the damage of the high-pressure jet to the curved pipe 4 for a long time. The angles of the water inlet section 41 and the water outlet section 42 of the curved pipe 4 are as shown in FIG. Figure 1 As shown, it can be adjusted according to actual conditions. The adjusted outlet section 42 of the elbow 4 should facilitate the water flow to be discharged directly from the outlet section 42, so as to prevent the water flow from being reflected and losing the water flow energy in the outlet section 42. The water inlet section 41 can also adjust the height of its water inlet and the angle between the water inlet section 41 and the vertical direction according to actual conditions, so as to match the direction of the high-pressure jet sprayed by the nozzle 12, ensure that the high-pressure jet can be directly sprayed to the upper end of the outlet section 42, reduce energy loss, and maximize the work of the runner 1.

[0047] Embodiment 2

[0048] like Figure 3 , 4As shown, the curved pipe type multi-nozzle 12 turbine includes four impellers 1 of the first embodiment, a fixed impeller shaft 7, a rotating shaft 8, a pulley 9, a belt 10, a plurality of nozzles 12 connected to a plurality of water diversion pipes 11 and two generators 13; the inner drum 3 of the impeller 1 is movably sleeved on the impeller shaft 7 through a bearing; the rotating shaft 8 is vertically arranged parallel to the impeller shaft 7, the pulley 9 is fixedly sleeved on the rotating shaft 8, the pulley 9 is connected to the impeller housing 2 through a belt 10, and the number of pulleys 9 is the same as that of the impeller 1; both ends of the rotating shaft 8 are respectively connected to the input shaft of the generator 13 through a belt 10; the nozzle 12 is arranged above the curved pipe 4 of each impeller 1 and is directly opposite to the water inlet of the water inlet section 41 of the curved pipe 4, and the high-pressure jet ejected by the nozzle is parallel to the water inlet section 41 of the curved pipe 4.

[0049] like Figure 3 As shown, the outer diameters of the four wheels 1 arranged on the wheel shaft 7 increase layer by layer from top to bottom to form a tower; the bottoms of the three upper wheels 1 are all provided with sawtooth-shaped water diversion plates 14, and the circular edges of the inner drum plates 3 of the three lower wheels 1 are evenly provided with a number of drainage holes 15; Figure 5 , 7 As shown, the water guide plate 14 is arranged along the inner surface of the lower part of the circular runner housing 2, and its serrations are arranged obliquely downward and extend out of the runner housing 2; Figure 5 , 6 As shown in FIG. 7 , an arc-shaped tile-shaped sub-blade 16 is obliquely arranged in the drainage hole 15. The sub-blade 16 is obliquely arranged in the rotation direction of the runner 1, and its upper part extends out of the drainage hole 15. The arc opening of the sub-blade 16 is opposite to the rotation direction of the runner 1; Figure 7 As shown, the water guide blade 14 of the upper runner 1 is directly opposite to the sub-blade 16 of the adjacent lower runner 1, as shown in FIG. Figure 3 , 4 As shown, the bottom of the wheel housing 2 of the upper wheel 1 is flush with the top of the waterproof ring 5 of the lower wheel 1; a plurality of nozzles 12 are provided on each layer of the wheel 1, which are opposite to the curved pipes 4 in the wheel 1 of that layer; high-pressure jets are sprayed toward the curved pipes 4 through the nozzles 12 to drive the four wheels 1 to rotate on the wheel shaft 7, thereby driving the four pulleys 9 and the rotating shaft 8 to rotate, thereby driving the generator 13 to generate electricity.

[0050] like Figure 5 , 7 As shown, the teeth of the water guide blade 14 are in a slanted shape. The sub-blades 16 are at an angle of 40°-60° to the vertical. Figure 3 , 4 As shown, four pulleys 9 are connected to the rotating wheels 1 on the same horizontal plane with belts 10. The nozzles 12 of each rotating wheel 1 are symmetrically distributed on the left and right sides. Figure 3 , 4As shown, the curved pipe multi-nozzle 12 turbine also includes a water inlet trough 17 and a drainage trough 18. The water inlet trough 17 is connected to the nozzle 12 through a water inlet pipe 11, and the drainage trough 18 is arranged below the bottom runner 1 to discharge the water flow passing through the turbine.

[0051] The number of nozzles 12 of the first runner 1 of the water turbine of this embodiment is 20 from top to bottom, the number of nozzles 12 of the second runner 1 is 18, the number of nozzles 12 of the third runner 1 is 16, and the number of nozzles 12 of the fourth runner 1 is 14, and the number of nozzles 12 decreases step by step. The water sprayed by the nozzles 12 of the first three runners 1 has three, two, and one repeated impact opportunities. After the last tail runner 1 is finished, the water is discharged from the drainage groove 18, and the whole work is completed.

[0052] The turbine of this embodiment is as follows Figure 3 As shown, the water flow first connects the nozzle 12 and the water diversion trough 17 through the water diversion pipe 11. All the nozzles 12 are opened, and the nozzles 12 on each layer of the runner 1 drive the different runners 1 to rotate through high-pressure jets. The water discharged by the high-pressure jets from the top runner 1 is discharged through the water outlet section 42. Under the action of the water's own weight and the centrifugal force of the runner 1, the water flow is directly ejected along the serrations of the water diversion sheet 14 onto the sub-blades 16 of the lower runner 1, thereby impacting the sub-blades 16. The water flow of the top runner 1 passes through the three lower runners 1 respectively to complete three impacts, which can fully utilize the energy of the water flow. Figure 7 As shown, it is a three-dimensional diagram of the cooperation between the second and third runners 1, the water guide blades 14 of the second layer and the sub-blades 16 of the third layer runner 1 are facing each other, and a gap is formed between the runner housing 2 of the second layer runner 1 and the waterproof ring 5 of the third layer runner 1 for placing the nozzle 12, and other adjacent runners 1 are arranged in the same way. Figure 7 As shown, the third-layer runner 1 is not only impacted by the high-pressure jet of the nozzle 12, but also guided by the water guide sheet 14 of the second-layer runner 1, so that the water flowing out of the first-layer runner 1 and the second-layer runner 1 is projected onto the sub-blades 16 of the third-layer runner 1 through the water guide sheet 14. The dotted arrow in the figure is the direction of the water flow drawn out by the water guide sheet 14, and the top circular arrow is the rotation direction of the runner 1, and so on. The elbow 4 is connected to the outside of the inner drum 3, and the sub-blades 16 are arranged on the edge of the plane of the inner drum 3 to form two inner and outer rings. This structure separates the impact of the nozzle 12 of the runner 1 and the impact of the water guide sheet 14, without interfering with each other, effectively utilizing the energy of the water flow and improving the power generation efficiency.

[0053] The water turbine of the present invention can achieve the purpose of matching the rotation speed of the runner 1 with the generator 13 without a speed regulator by adjusting the size of the pulley 9. The purpose of matching the rotation speed of the runner 1 with the generator 13 can also be achieved by switching the number of nozzles 12. The water turbine of the present invention has a wide range of applications, a simple structure, convenient adjustment, and is easy to use, greatly increasing the power generation.

[0054] The above embodiments should be understood to be only used to illustrate the present invention and not to limit the protection scope of the present invention. After reading the contents of the present invention, technicians can make various changes or modifications to the present invention, and these equivalent changes and modifications also fall within the scope defined by the claims of the present invention.

Claims

1. The bent pipe multi-nozzle turbine is characterized by: It includes a curved pipe runner, a fixed runner shaft, a rotating shaft, a pulley, a belt, a plurality of nozzles connected to a plurality of water diversion pipes, and a generator; The runner comprises a circular runner housing, a circular inner drum with an axial hole sleeved in the runner housing, and a plurality of curved pipes; the runner housing is coaxial with the inner drum; the curved pipe comprises a water inlet section and a water outlet section; a plurality of curved pipes are evenly and fixedly arranged between the runner housing and the inner drum at the same angle to the vertical, the water inlets of the water inlet sections of the plurality of curved pipes are arranged in the same direction along the loop line where the plurality of curved pipes are located, the water inlet section of the curved pipes is arranged above the water outlet section, and the water inlet section and the water outlet section of the curved pipes are both arranged obliquely; The corner of the curved pipe is rounded; a plurality of rollers are arranged at the corner of the curved pipe, and the plurality of rollers are arranged on the inner wall of the outer rounded corner of the corner and opposite to the water inlet of the water inlet section; The rotating wheel is movably sleeved on the rotating wheel shaft through the inner drum; the rotating shaft is vertically arranged parallel to the rotating wheel shaft, the pulley is fixedly sleeved on the rotating shaft, and the pulley is connected to the rotating wheel housing through a belt; the rotating shaft is connected to the input shaft of the generator through a belt; the nozzle is arranged above the elbow and directly faces the water inlet of the water inlet section of the elbow, and the high-pressure jet ejected by the nozzle is parallel to the water inlet section of the elbow; the high-pressure jet is ejected to the elbow through the nozzle to drive the rotating wheel to rotate on the rotating wheel shaft, thereby driving the pulley and the rotating shaft to rotate, thereby driving the generator to generate electricity; A waterproof ring extending upward is provided at the upper end of the rotor housing, and the upper edge of the waterproof ring is higher than the water inlet of the elbow water inlet section; The water inlet section of the elbow is at an angle of 60°-70° to the vertical; There are several wheels, all of which are movably sleeved on the wheel shaft; the number of pulleys is the same as that of wheels, and they are matched with the wheels respectively; the wheels arranged on the wheel shaft have outer diameters increasing layer by layer from top to bottom to form a tower; the bottoms of the wheels except the bottom wheel are all provided with serrated water diversion plates, and the circular edges of the inner drums of the wheels except the top wheel are evenly provided with several drainage holes; the water diversion plates are arranged along the inner surface of the lower part of the circular wheel shell, and the serrations thereof are arranged obliquely downward and extend out of the wheel shell; arc-shaped tile-shaped sub-blades are obliquely arranged in the drainage holes, The sub-blades are arranged obliquely in the direction of rotation of the runner, and their upper parts extend out of the drainage holes, and their arc openings are opposite to the direction of rotation of the runner; the water diversion plates of the upper runner are directly opposite to the sub-blades of the adjacent lower runner, and the bottom of the upper runner shell is flush with or lower than the top of the waterproof ring of the lower runner; a plurality of nozzles are arranged on each runner layer, which are opposite to the curved pipes in the runner layer; high-pressure jets are sprayed into the curved pipes through the nozzles to drive a plurality of runners to rotate on the runner shaft, thereby driving a plurality of pulleys and a rotating shaft to rotate, thereby driving the generator to generate electricity.

2. The curved pipe multi-nozzle turbine according to claim 1, characterized in that: The water inlet section and the water outlet section of the elbow form an angle of 80°-90°.

3. The curved pipe multi-nozzle turbine according to claim 1, characterized in that: The upper edge of the water inlet of the curved pipe water inlet section is higher than the inner drum plate.

4. The curved pipe multi-nozzle turbine according to claim 1, characterized in that: The sub-blades form an angle of 40°-60° with the vertical direction.

5. The curved pipe multi-nozzle turbine according to claim 1 or 4, characterized in that: There are four rotating wheels.

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