19 results about "Kaplan turbine" patented technology

The utility model discloses an axial flow Kaplan turbine which comprises a runner hub, a plurality of rotating shafts, a plurality of blades, a first driving mechanism and a second driving mechanism, each rotating shaft is arranged around the runner hub, each rotating shaft is of a telescopic structure, and one end of each rotating shaft is rotationally connected with the runner hub; each blade is arranged on the side of the runner hub in the circumferential direction and fixedly connected with one end of the corresponding rotating shaft. The first driving mechanism is connected with the rotating shafts and used for driving the rotating shafts to rotate synchronously so as to adjust the inclination angles of the blades. The water turbine has the advantages that the second driving mechanism can drive the rotating shafts to extend synchronously, so that the distance between each blade and the runner hub is increased, the horizontal distance between each blade and water flow is reduced, when the water flow is small, most of the water flow can fall on the blades, and the power generation efficiency of the water turbine is improved.

The invention discloses a Kaplan turbine and water pump paddle opening degree measuring device, relates to the technical field of hydroelectric equipment, and aims to solve the problem that the existing measuring mode cannot mechanically measure the current paddle opening degree of a water turbine, and the device comprises a scale plate arranged on a shell of a generator, a motor shaft of the generator is connected with the hydraulic oil cylinder through a connecting flange, the hydraulic oil cylinder is located at the upper end of the motor shaft, a pointer moving in the height direction of the scale plate is arranged on the scale plate, and the distance measuring disc is of a circular ring structure, connected with a piston rod of the hydraulic oil cylinder through a connecting assembly and arranged on the periphery of the connecting flange. The elastic assembly extends in the height direction of the scale plate, the lower end of the elastic assembly makes contact with the distance measuring disc, the upper end of the elastic assembly is connected with a telescopic rod of the displacement sensor through a connecting rod, and the pointer is connected with the elastic assembly. And the current blade opening of the water turbine and the water pump can be measured when the electric sensor fails.

The invention discloses a high-precision modeling method for an axial-flow Kaplan turbine based on a seagull optimization algorithm and a BP (Back Propagation) neural network. The high-precision modeling method comprises the following steps: acquiring basic modeling data of the axial-flow Kaplan turbine; the opening degree characteristic and efficiency characteristic data of the axial-flow Kaplan turbine are supplemented; constructing a flow characteristic and torque characteristic data set of the axial-flow Kaplan turbine; correcting the guide vane opening degree in the flow characteristic and torque characteristic data set of the axial flow Kaplan turbine; constructing a guide vane and paddle joint characteristic model based on a seagull optimization algorithm and a BP neural network; and in combination with the corrected data set, the BP neural network and a seagull optimization algorithm, reconstructing a flow characteristic and torque characteristic neural network model of the axial-flow Kaplan turbine. According to the axial-flow movable propeller water turbine modeling method considering the modeling data quality and the guide vane and paddle joint characteristics, a high-precision and nonlinear axial-flow movable propeller water turbine model can be obtained, and a model basis is provided for axial-flow movable propeller water turbine unit control strategy research.

The utility model provides an axial flow Kaplan turbine runner maintenance lifting device, which belongs to the technical field of hydroelectric power generation equipment and comprises two groups of bottom plates and connecting plates fixedly connected to the side walls of the bottom plates, the bottom plates are symmetrically arranged relative to the central axis of the connecting plates, and the bottom walls of the bottom plates are connected with universal wheels. The top wall of the bottom plate is fixedly connected with a supporting plate, the inner wall of the supporting plate is slidably connected with lifting plates, the side walls of the two lifting plates are fixedly connected with a set of fixing rods, and the bottom walls of the fixing rods are connected with lifting parts used for lifting the rotating wheels; the side wall of the supporting plate is connected with an adjusting component used for adjusting the height of the lifting plate, the rotating wheel is conveniently prevented from shaking during lifting by arranging the lifting component, so that the safety is improved, the rotating wheel can be conveniently adapted to different use places through the adjusting component, and the applicability is higher.

The invention discloses a water-lubricated vertical shaft Kaplan turbine runner which comprises a runner body, a water-lubricated vertical shaft Kaplan turbine runner, a water-lubricated vertical shaft Kaplan turbine runner and a water-lubricated vertical shaft Kaplan turbine runner, the paddles are rotationally arranged on the runner hub; the servomotor comprises a piston rod slidably arranged in the runner hub and a high-pressure oil cylinder arranged at the lower end of the runner hub, and a piston matched with the high-pressure oil cylinder is arranged at the lower end of the piston rod; the piston rod is connected with the paddle through the connecting rod mechanism, high-pressure oil in the high-pressure oil cylinder body provides power for the piston rod, and therefore the opening degree of the paddle is adjusted. According to the scheme, the oil pollution problem of the water turbine is greatly avoided; the structural stability of the paddle is improved, and the risk of paddle sealing failure is reduced; the structure of parts of the rotating wheel is optimized, machining steps are reduced, machining cost is reduced, welding points of the parts are reduced, the overall sealing effect of the rotating wheel is improved, oil leakage points are reduced, and machining efficiency and production quality are greatly improved.

The invention discloses a rotating wheel oil isolation structure of a Kaplan turbine, and relates to the field of reaction hydraulic machinery, the rotating wheel oil isolation structure comprises a main shaft and a hub, the inner side of the main shaft is provided with an operation oil pipe, the center of the main shaft is provided with a piston rod extending into the hub, the hub is internally provided with a piston cavity and an oil-free cavity, and the piston cavity and the oil-free cavity are communicated with each other. Breathing channels are arranged in the main shaft and the hub, and the piston rod is sleeved with a flexible telescopic joint which is fixedly connected with the hub and the piston rod. One end of the flexible expansion joint is fixed to the hub, the other end of the flexible expansion joint is fixed to the piston rod, the flexible expansion joint does not generate contact friction when moving between the piston rod and the hub, the installation position belongs to static sealing, stability and reliability are higher, and leakage of hydraulic oil can be effectively prevented. The hub oil-free cavity is communicated with the atmosphere through the main shaft and a breathing channel in the hub, so that the pressure of the hub oil-free cavity is lower than that of a flow channel, and pollution caused by leakage of contents in the hub is further avoided.

The utility model relates to a Kaplan runner structure and an axial-flow Kaplan turbine. The rotating paddle type runner structure comprises a runner cone, a runner hub, a plurality of runner blades, a servomotor assembly and a plurality of operating mechanisms. The servomotor assembly is arranged below the rotating wheel body, and the operating mechanism is arranged on the upper portion in the rotating wheel body, so that the number of times of turning over in the rotating paddle type rotating wheel structure assembling process can be reduced, the assembling manufacturability is optimized, and the assembling safety is improved. The runner hub is not used as a servomotor cylinder any more, so that positions needing precision matching on the runner hub are reduced, the casting manufacturability and the yield of the runner hub are improved, the casting cost of the runner hub is reduced, the machining technological process of the runner hub is reduced, the production and manufacturing period is shortened, and the production cost is reduced. When the servomotor cylinder is abraded, the rotating wheel body does not need to be maintained, the maintenance process of the servomotor cylinder is simplified, the maintenance work of the rotating paddle type rotating wheel structure is simplified, the maintenance cost is reduced, the maintenance cost is shortened, and the maintenance efficiency is higher.

The invention concerns a Kaplan turbine (100) comprising: - a runner, which comprises a number of blades (16) and a hub (114), located at the end of a shaft (126) and supporting the blades, - a curved or S shaped discharge ring (200), having a discharge ring throat, - wherein each of said blades having a removable blade tip (138), so that the outside diameter of the runner is larger than said discharge ring throat diameter (D) when the blade tips are mounted on the blades, but smaller (d2) than said discharge ring throat diameter (D) when the blade tips are removed from the blades.

This application discloses an apparatus and method for manufacturing Cabran-type turbine blades using electroslag casting, belonging to the field of electroslag casting. A free electrode is disposed in the flange area (including the transition area) and arranged between the guide electrodes of a flexible electrode casting system. The cross-sectional profile of the free electrode is adapted to the cavity of the flange area. The free electrode is held in place by a clamping mechanism to maintain its position or move vertically. For the electroslag casting process of turbine blades with a composite cross-section of "blade + flange," this application solves the problems of electrode transition and consumable electrode design in electroslag casting by introducing a dedicated free electrode for the flange area and coordinating with the flexible electrode casting system for partitioned filling. This enables the manufacture of Cabran-type (through-flow and axial-flow) turbine blade castings, i.e., castings with three-dimensional curved surfaces and large cross-sectional area variations, using electroslag casting, thus expanding the application scope of electroslag casting.

The invention discloses an axial-flow Kaplan turbine speed regulation optimization method based on cooperative control of guide vanes and paddles. The method is characterized by comprising the following steps that 1, models of all parts of an axial-flow Kaplan turbine speed regulation system are established; step 2, adding a signal distribution device between a PID controller and an execution mechanism of the model; 3, optimizing the coefficient K by using a particle swarm algorithm, and adopting different optimization coefficients K under different working conditions, so as to optimize the axial-flow Kaplan turbine under different working conditions, and inputting the coefficient K corresponding to the working conditions into a signal distribution device, so that the signal distribution device exerts the optimal performance; compared with a traditional movable propeller turbine speed regulating system, the speed regulating system has the advantages that the regulating speed is higher while the regulating precision is guaranteed, the system is suitable for different working conditions, and the added signal distribution device is high in reliability, convenient to control and easy to implement.

The utility model provides a suspension device for an axial-flow movable paddle type water turbine, which belongs to the technical field of water turbines, and comprises a bottom frame, stretching structures arranged inside two sides of the bottom frame, extending frames arranged on one sides of the stretching structures, rotating seats arranged at the bottom ends of pulley yokes, and mounting plates fixed at the bottom ends of the rotating seats, and fixing structures are mounted on the outer sides of the mounting discs. According to the utility model, the movable arm is pulled to enable the bracket to hook the edge of the top tray of the water turbine, the fixed pin is inserted into the adjusting groove, the position of the movable arm is fixed, and the positioning screw rod is rotated to enable the pressure plate to press and fix the position of the top tray of the water turbine, so that the size adjustment function of the device is realized, and the device is suitable for water turbine top covers with different sizes; meanwhile, the top cover of the water turbine is fixed in a clamping mode, the damage time of mounting bolts is shortened, and the maintenance efficiency is greatly improved.

The invention discloses a connecting device for a high-oil-pressure oil head and a Kaplan turbine, and relates to the technical field of water turbines and related equipment thereof. One end of the oil head is connected with a large shaft of a generator, and a first connecting oil pipe and a second connecting oil pipe are arranged in the oil head; a circle of oil grooves are formed in the first connecting oil pipe and the second connecting oil pipe and communicated with the internal pipeline, the outer portions of the first connecting oil pipe and the second connecting oil pipe are connected with a rotary connector, and an oil tank is arranged at the top of the oil head. The connecting device of the high-oil-pressure oil head and the Kaplan turbine is good in sealing effect. The connecting device of the high-oil-pressure oil head and the Kaplan turbine is high in oil pressure.

The invention concerns a Kaplan turbine (100) comprising: - a runner, which comprises a number of blades (16) and a hub (114), located at the end of a shaft (126) and supporting the blades, - a curved or S shaped discharge ring (200), having a discharge ring throat, - wherein each of said blades having a removable blade tip (138), so that the outside diameter of the runner is larger than said discharge ring throat diameter (D) when the blade tips are mounted on the blades, but smaller (d2) than said discharge ring throat diameter (D) when the blade tips are removed from the blades.

The present invention belongs to the field of hydraulic turbines, and provides a blade angle linkage mechanism for an axial flow Kaplan turbine, including a runner body, on which a plurality of blade assemblies are installed, and the plurality of blade assemblies are evenly distributed around the axis of the runner body. The mechanism further includes: a linkage mechanism installed inside the runner body, and a plurality of output ends of the linkage mechanism are in transmission connection with one ends of the plurality of blade assemblies, and the linkage mechanism is used to drive the plurality of blade assemblies to rotate synchronously and in the same direction. In the present invention, by means of the outer adjusting rod and the inner adjusting rod, the linear motion of the piston in the prior art is decomposed into a number of cyclic linear motions, so that the driving force required for each step is greatly reduced, making it easier to drive the outer adjusting rod and the inner adjusting rod. Moreover, each time the adjusting mechanism makes a cycle, the blade will be changed by a small angle, thus enabling more precise adjustment of the blade angle.

The utility model discloses a Kaplan turbine runner and an anti-cavitation bionic blade thereof, and belongs to the technical field of fluid machinery and engineering equipment, the Kaplan turbine runner comprises a blade body, a strip-shaped flexible part is arranged on the suction surface of the blade body, and the whole flexible part is tightly attached to the upstream of the cavitation position of the blade in the spanwise direction of the blade. One part, in the length direction, of the flexible part is connected with the blade, the other part of the flexible part freely swings under excitation of unsteady incoming flow, and flow separation is controlled by a turbulent flow vortex with a certain frequency generated through self-adaptive flutter. The flexible part capable of swinging freely is arranged on the suction surface of the blade to generate turbulent flow vortex to control flow separation, so that the lowest pressure of the suction surface of the blade is improved, cavitation is improved, and the blade has the advantages of low cost, convenience in arrangement and the like.

The invention discloses an axial-flow Kaplan turbine stress and fatigue failure rapid prediction method, which comprises the following steps: S1, extracting torque data of blades of a turbine through CFD, performing VMD decomposition and main mode selection on the torque data, and screening main modes; s2, inputting the main mode into the GMM, extracting an amplitude, a frequency and a phase, and synthesizing and reconstructing torque data according to the amplitude, the frequency and the phase; s3, inputting the reconstructed torque data into the LSTM network, outputting the stress of the blade and the rotating arm, taking the reconstructed torque data as an FSI load boundary condition, and calculating the stress of a component in combination with an ROM; and S4, predicting fatigue damage through a paris formula and a Miner criterion according to the calculated stress. Through the VMD decomposition and parameterization reconstruction technology, the data volume is reduced by more than 50% while the torque main mode physical significance is reserved, the main mode energy retention rate exceeds 95%, and the signal processing efficiency is remarkably improved.

The invention relates to the technical field of water turbine blades, and discloses an anti-crack Kaplan water turbine blade which comprises a blade body and a stress reduction transition body connecting the blade body and a hub body, and the size parameter of the stress reduction transition body is determined based on the diameter D1 of a runner: the equal height value d1 of a pressure side space fillet and the radius value R1 of the pressure side fillet are 0.02 D1 to 0.03 D1, d1 and R1 are not less than 100mm; the equal height value d2 of the space fillet of the negative pressure side and the radius value R2 of the fillet of the negative pressure side are 0.015 D1 to 0.02 D1, and the d2 and the R2 are not smaller than 75 mm. Cracks at the joints of the blades and the hub are avoided, the bearing capacity of the roots of the blades is enhanced, and the problems of root cracks and vibration under the hydraulic action are effectively solved.

The present invention discloses a guide vane opening detection method and system for an axial flow Kaplan turbine generator set, belonging to the technical field of hydrogenerator detection. First, the first guide vane opening value and the second guide vane opening value are respectively detected and compared with a preset difference threshold value. When the comparison result has a large error, the third guide vane opening value is detected for verification. The present invention ensures the detection accuracy of the guide vane opening, effectively solves the technical problem of large measurement error existing in the prior art, and ensures the safe and stable operation of the hydrogenerator set. At the same time, the system is simply constructed, has a high degree of automation, and can avoid the influence of the detection result caused by the damage or failure of individual electronic displacement sensors.

The utility model relates to a Kaplan turbine based on digital signal feedback. The Kaplan turbine based on digital signal feedback comprises a runner structure, a main shaft, an oil head and a feedback mechanism. The feedback mechanism comprises a magnetostriction displacement sensor installed on the main shaft, a metal guide rod with one end connected with the magnetostriction displacement sensor, a magnetic ring installed on the operation oil cylinder, a conductive slip ring installed on the oil receiver and a wire electrically connected between the magnetostriction displacement sensor and the conductive slip ring. The other end of the metal guide rod penetrates through the magnetic ring and is connected with the operation oil cylinder in a sliding mode. According to the Kaplan turbine based on digital signal feedback, static-dynamic transmission of the digital signals can be achieved, the opening degree of the blades can be accurately measured, meanwhile, the major potential safety hazard that a unit is shut down due to accidents caused by the fact that a feedback rod of a traditional Kaplan turbine is prone to bending deformation, defects and the like is eliminated, and safe and stable operation of the unit is guaranteed.