Variable-speed vertical hydraulic generator of submersible generator

Abstract

The utility model belongs to the technical field of hydroelectric power generation equipment, and discloses a variable speed vertical hydraulic generator of a submersible generator, which comprises a water head flow automatic monitoring device, a submersible vertical axial flow variable speed hydraulic generator set, a steel cable pipeline, an intelligent control device, a converter device, a hydraulic system, a trash rack and a water inlet gate. According to the utility model, transmission devices such as gears, belts and couplings are not needed, so that the efficiency loss is reduced, and vibration and noise generated by the transmission devices and faults generated by the transmission devices are eliminated; the generator set is operated by adopting a variable-speed constant-frequency technology, can be widely applied to hydropower stations with large water head amplitude, improves effective utilization of water energy, is of an integral structure, does not need a plant, is small in occupied area, is not afraid of flood submerging, is integrally hoisted, is simple and quick to install, and is short in installation period; and the operation working condition of the water turbine with partial load can be improved, maintenance is avoided, the service life is long, and the reliability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydroelectric power generation equipment, in particular to a variable speed vertical water turbine generator of a submersible generator. Background Art

[0002] At present, conventional small vertical axial flow turbine generator sets generally adopt an open channel diversion without seat ring structure, which consists of an axial flow turbine, a generator, a speed governor, an excitation device and other controls; its generator is installed on the generator layer of the plant, and the turbine is installed on the turbine layer; this unit requires a complex plant and water diversion system, the power station construction cost is high, and the operation and management are complicated, requiring professional operators; for some people in remote mountainous areas, they cannot afford the high cost of power station construction; they do not have the ability to install, debug, and operate and manage traditional units; this is bound to affect the application and development of small hydropower in remote rural areas;

[0003] Conventional hydro-turbine generator sets usually use synchronous generators with DC excitation, which can only operate at a constant speed, namely the rated synchronous speed. The generator speed is fixed to ensure that the frequency of the current output to the power grid is the industrial frequency. In addition, conventional turbines are usually designed to reach near the optimal unit speed under a given head. The turbine has good performance and high efficiency when operating near the optimal unit speed. The head of a conventional hydropower station, whether it is initially put into operation or officially put into operation, has a wide range of variation, which makes it impossible for the turbine to continue to operate at the optimal operating conditions. When it deviates from the optimal unit speed, the turbine efficiency is greatly reduced, the cavitation coefficient is increased, the abrasion and unit vibration are increased, the unit operating conditions are deteriorated, and the safe operation of the unit is affected. In this way, the energy utilization rate cannot be maximized, resulting in a certain amount of waste. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides a variable speed vertical hydro-turbine generator of a submersible generator.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a submersible generator variable speed vertical water turbine generator, comprising a head flow automatic monitoring device, a submersible vertical axial flow variable speed water turbine generator set, a steel cable pipeline, an intelligent control device, a converter device, a hydraulic system, a trash rack and a water inlet gate, the submersible vertical axial flow variable speed water turbine generator set comprising a high-efficiency permanent magnet synchronous submersible generator and an axial flow turbine, and a water turbine is arranged below the high-efficiency permanent magnet synchronous submersible generator;

[0006] The high-efficiency permanent magnet synchronous submersible generator includes a shell, a terminal box is arranged on one side of the shell surface, a rotor is arranged inside the shell, a stator is arranged on the outside of the rotor, a base is arranged inside the shell, a stator winding is arranged inside the base, a stator core located on the outside of the base is wound on the surface of the stator winding, a rotor core located inside the base is arranged on the outside of the stator core, a main shaft is arranged inside the shell, rare earth permanent magnets are arranged inside the magnetic steel slot of the stator core, an upper end cover is arranged at the top of the rotor, a stator base terminal box seat is arranged at the top of the upper end cover, a rubber sealing strip 2 is arranged between the upper end cover and the stator base terminal box seat, a lower end cover located at the bottom end of the stator base terminal box seat is fixedly installed at the bottom end of the rotor, an intermediate shaft is arranged at the center of the bottom end of the upper end cover, and a rubber sealing strip 1 is arranged between the upper end cover and the shell;

[0007] The axial flow turbine includes a water guiding mechanism, which is arranged inside the shell, a thrust bearing is arranged on the surface of the main shaft, a support cover is arranged inside the shell, a runner is arranged at the bottom end of the main shaft, a tail water pipe is arranged at the bottom end of the shell, a vertical support arm base plate is arranged on the outside of the shell, and a vertical support arm is arranged at the top end of the vertical support arm base plate.

[0008] Preferably, a guide vane is provided inside the shell, a connecting plate is provided on the surface of the shell, a pin shaft is provided inside the connecting plate, an ear handle seat is provided on the surface of the shell, an oil cylinder is provided on the surface of the ear handle seat, and a control ring ear handle seat is provided on the output shaft of the oil cylinder.

[0009] Preferably, an upper fixing ring is provided on the surface of the guide vane, a guide vane shaft is provided inside the guide vane, a vane rotating mechanism is provided at the bottom end of the guide vane, the guide vane shaft penetrates downwardly through the vane rotating mechanism, a wheel chamber is provided on the surface of the vane rotating mechanism, a guide vane group is provided inside the guide vane, a control ring is provided at the bottom end of the left guide vane, and a pin shaft 2 is provided at the top end of the vane rotating mechanism.

[0010] Preferably, the water turbine is an axial flow water turbine without a seat ring structure, the stator and the support cover are connected together, and a sealing component is provided between the joint surfaces.

[0011] Preferably, the junction box is of fully sealed design, and a sealing gasket is provided between the junction box and the stator frame junction box seat.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model integrates the independent water turbine and generator placed in the traditional factory building into a whole through the submersible variable speed integrated water turbine generator set, and the whole is submerged in water. The generator and the water turbine are directly driven by one shaft, and no transmission devices such as gears, belts and couplings are needed, so as to reduce the loss of efficiency and eliminate the vibration and noise generated by the transmission device and the faults caused by the transmission device. The generator set adopts the variable speed constant frequency technology for operation and can be widely used in hydropower stations with large head amplitude variation, thereby improving the effective utilization of water energy. Since the generator is an integral structure, no factory building is required, the floor space is small, and it is not afraid of being submerged by floods. It can be hoisted as a whole, and the installation is simple and quick, with a short installation period. In addition, the utilization rate of the water turbine is high and the operating condition of the water turbine at partial load can be improved. It is maintenance-free, has a long service life and is highly reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram showing the interior of the submersible vertical axial-flow variable-speed hydro-turbine generator set of the utility model;

[0016] Figure 3 This is a schematic diagram of a water turbine device viewed from above according to the utility model;

[0017] Figure 4 This is a schematic diagram showing the water turbine of the utility model;

[0018] Figure 5 The utility model is a flow chart of a variable speed vertical hydro-turbine generator of a submersible generator.

[0019] In the figure: 1. Automatic monitoring device for water head and flow; 2. Submersible vertical axial flow variable speed hydro-turbine generator set; 3. Steel cable pipeline; 4. Intelligent control device; 5. Converter device; 6. Hydraulic system; 7. Trash rack; 8. Inlet gate; 101. Stator; 101a. Stator core; 101b. Stator winding; 101c. Frame; 102. Rotor; 102a. Main shaft; 102b. Rotor core; 103. Junction box; 103a. Stator frame junction box seat; 104. Upper end cover; 105. Rare earth permanent magnet; 105a. Intermediate shaft; 106. Rubber sealing strip 1; 107. Rubber sealing strip 2; 108 , lower end cover; 201, water guide mechanism; 202, support cover; 203, runner; 205, vertical support arm; 206, tailwater pipe; 207, vertical support arm base plate; 208, thrust bearing; 209, sealing assembly; 210, shell; 20121, guide vane; 20142, connecting plate; 20145, pin one; 20141a, control ring ear handle seat; 20143, oil cylinder; 20143b, ear handle seat; 2011, runner chamber; 2012, guide vane group; 2013, upper fixing ring; 2014, rotor blade rotation mechanism; 2015, guide vane shaft; 20141, control ring; 20124, pin two. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figures 1 to 5 As shown, the utility model provides a submersible generator variable speed vertical water turbine generator, comprising a head flow automatic monitoring device 1, a submersible vertical axial flow variable speed water turbine generator set 2, a steel cable pipeline 3, an intelligent control device 4, a converter device 5, a hydraulic system 6, a trash rack 7 and a water inlet gate 8, the submersible vertical axial flow variable speed water turbine generator set 2 comprises a high-efficiency permanent magnet synchronous submersible generator and an axial flow turbine, and a water turbine is arranged below the high-efficiency permanent magnet synchronous submersible generator;

[0022] The high-efficiency permanent magnet synchronous submersible generator includes a housing 210, a terminal box 103 is arranged on one side of the surface of the housing 210, a rotor 102 is arranged inside the housing 210, a stator 101 is arranged outside the rotor 102, a base 101c is arranged inside the housing 210, a stator winding 101b is arranged inside the base 101c, a stator core 101a located outside the base 101c is wound on the surface of the stator winding 101b, a rotor core 102b located inside the base 101c is arranged outside the stator core 101a, and a main shaft 102 is arranged inside the housing 210. 02a, a rare earth permanent magnet 105 is arranged inside the magnetic steel slot of the stator core 101a, an upper end cover 104 is arranged at the top of the rotor 102, a stator base terminal box seat 103a is arranged at the top of the upper end cover 104, a rubber sealing strip 107 is arranged between the upper end cover 104 and the stator base terminal box seat 103a, a lower end cover 108 located at the bottom end of the stator base terminal box seat 103a is fixedly installed at the bottom end of the rotor 102, an intermediate shaft 105a is arranged at the center of the bottom end of the upper end cover 104, and a rubber sealing strip 106 is arranged between the upper end cover 104 and the shell 210.

[0023] The axial flow turbine includes a water guiding mechanism 201, which is arranged inside a shell 210, a thrust bearing 208 is arranged on the surface of a main shaft 102a, a support cover 202 is arranged inside the shell 210, a runner 203 is arranged at the bottom end of the main shaft 102a, a tail water pipe 206 is arranged at the bottom end of the shell 210, a vertical support arm base plate 207 is arranged on the outside of the shell 210, and a vertical support arm 205 is arranged at the top end of the vertical support arm base plate 207.

[0024] The above scheme is adopted: the operator can open the trash rack 7, and then the water will flow. During the flow, the water inlet gate 8 will filter the water, and the water will contact the submersible vertical axial flow variable speed water turbine generator set 2, and then the water will enter the turbine guide vane group 2012 axially, and the stroke of the oil cylinder 20143 is controlled by oil pressure to control the rotation of the blade rotating mechanism 2014, and then the guide vane group 2012 will be opened, so that the water flows into the inside of the impeller 203, and then impacts the blades and rotates them, and then the blades on the surface of the impeller 203 can effectively capture and utilize the water flow energy and convert it into mechanical energy. As the impeller rotates, the mechanical energy is further transmitted to the generator part connected to it, and then the generator will receive the mechanical energy input from the axial flow turbine, and the rare earth permanent magnet steel 105 inside the shell 210 will form a rotating strong constant magnetic field, forming a magnetic force lines; the stator winding 101b cuts the rotating magnetic force lines of the rare earth permanent magnet steel 105, thereby generating an alternating current, which then drives the generator to generate electricity; the generated electricity then enters the interior of the intelligent control device 4 through the steel cable conduit 3, and then the converter device 5 converts the non-standard AC power into a DC power supply, and then converts the DC power supply into a standard AC power supply, and finally transmits it to the power plant; the head and flow automatic monitoring device 1 monitors the current head and flow signal and sends it to the intelligent control device 4, and the intelligent control device 4 pre-stores the head, flow, output and optimal speed curve data, and the intelligent control device 4 automatically calculates the optimal flow according to the current head, flow and output, and automatically controls the stroke of the cylinder 20143 to control the rotation of the vane rotating mechanism 2014, thereby controlling the opening of the guide vane 20121 in the guide vane group 2012 to adjust the flow and achieve optimal power generation.

[0025] like Figure 3 As shown, a guide vane 20121 is arranged inside the shell 210, a connecting plate 20142 is arranged on the surface of the shell 210, a pin shaft 20145 is arranged inside the connecting plate 20142, an ear handle seat 20143b is arranged on the surface of the shell 210, a cylinder 20143 is arranged on the surface of the ear handle seat 20143b, and a control ring ear handle seat 20141a is arranged on the output shaft of the cylinder 20143.

[0026] like Figure 4 As shown, an upper fixing ring 2013 is provided on the surface of the guide vane 20121, a guide vane shaft 2015 is provided inside the guide vane 20121, a vane rotating mechanism 2014 is provided at the bottom end of the guide vane 20121, the guide vane shaft 2015 penetrates downwardly through the vane rotating mechanism 2014, a wheel chamber 2011 is provided on the surface of the vane rotating mechanism 2014, a guide vane group 2012 is provided inside the guide vane 20121, a control ring 20141 is provided at the bottom end of the left guide vane 20121, and a pin shaft 20124 is provided at the top of the vane rotating mechanism 2014.

[0027] like Figure 1 As shown, the turbine adopts an axial flow turbine without a seat ring structure, the stator 101 is connected with the support cover 202, and a sealing component 209 is arranged between the joint surfaces.

[0028] The above scheme is adopted: through the design of the turbine, the axial flow turbine performs well in water utilization efficiency and improves the overall efficiency of the turbine. The design of the seat ring-free structure helps to enhance the stability of the turbine, making the maintenance of the turbine more convenient. A sealing assembly 209 is provided at the connection between the stator 101 and the support cover 202, thereby increasing the sealing performance of the device and preventing water from entering the interior of the device.

[0029] like Figure 1 As shown, the junction box 103 is of fully sealed design, and a sealing gasket is provided between the junction box 103 and the stator frame junction box seat 103a.

[0030] The above scheme is adopted: through the design of the junction box 103 and the stator base junction box seat 103a, since the junction box 103 is a fully sealed design, its waterproof, dustproof and corrosion-resistant properties can be enhanced, thereby ensuring that it can operate stably in various harsh environments, and the sealing gasket is made of highly elastic and wear-resistant materials, which can fit tightly to the contact surface of the two components and effectively prevent oil or gas leakage; at the same time, the sealing gasket also has a certain buffering effect, which can reduce the vibration and impact between the components and improve the overall operation stability.

[0031] The working principle and use process of this utility model:

[0032] First, the operator can open the trash rack 7, and then water will flow. Then the water will enter the turbine's impeller 203 axially, and then impact the blades and make them rotate. Then the impeller 203 will convert it into mechanical energy. As the impeller rotates, the mechanical energy is further transmitted to the generator connected to it. Then the generator will receive the mechanical energy input from the axial flow turbine. Then the rare earth permanent magnet 105 inside the shell 210 will generate a strong rotating constant magnetic field to form magnetic lines of force; the stator winding 101b cuts the rotating magnetic lines of force of the rare earth permanent magnet 105, thereby generating alternating current, which drives the generator to generate electricity; then the generated electricity will enter the intelligent control device 4 through the steel cable conduit 3, and then the converter device 5 will convert the non-standard AC power into DC power, and then convert the DC power into standard AC power, and finally transmit it to the power plant.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A submersible variable speed vertical hydro-turbine generator, comprising a head flow automatic monitoring device (1), a submersible vertical axial flow variable speed hydro-turbine generator set (2), a steel cable conduit (3), an intelligent control device (4), a converter device (5), a hydraulic system (6), a trash rack (7) and a water inlet gate (8), Features: The submersible vertical axial-flow variable-speed hydraulic turbine generator set (2) comprises a high-efficiency permanent-magnet synchronous submersible generator and an axial-flow hydraulic turbine, wherein the hydraulic turbine is arranged below the high-efficiency permanent-magnet synchronous submersible generator; The high-efficiency permanent magnet synchronous submersible generator comprises a housing (210); a terminal box (103) is arranged on one side of the surface of the housing (210); a rotor (102) is arranged inside the housing (210); a stator (101) is arranged outside the rotor (102); a base (101c) is arranged inside the housing (210); a stator winding (101b) is arranged inside the base (101c); a stator core (101a) located outside the base (101c) is wound around the surface of the stator winding (101b); a rotor core (102b) located inside the base (101c) is arranged outside the stator core (101a); a main rotor (102b) is arranged inside the housing (210); shaft (102a), a rare earth permanent magnet (105) is arranged inside the magnetic steel slot of the stator core (101a), an upper end cover (104) is arranged at the top of the rotor (102), a stator base terminal box seat (103a) is arranged at the top of the upper end cover (104), a second rubber sealing strip (107) is arranged between the upper end cover (104) and the stator base terminal box seat (103a), a lower end cover (108) located at the bottom end of the stator base terminal box seat (103a) is fixedly mounted at the bottom end of the rotor (102), an intermediate shaft (105a) is arranged at the center of the bottom end of the upper end cover (104), and a first rubber sealing strip (106) is arranged between the upper end cover (104) and the housing (210); The axial flow turbine comprises a water guide mechanism (201), the water guide mechanism (201) is arranged inside a casing (210), a thrust bearing (208) is arranged on the surface of the main shaft (102a), a support cover (202) is arranged inside the casing (210), a runner (203) is arranged at the bottom end of the main shaft (102a), a tailwater pipe (206) is arranged at the bottom end of the casing (210), a vertical support arm base plate (207) is arranged outside the casing (210), and a vertical support arm (205) is arranged at the top end of the vertical support arm base plate (207).

2. The variable speed vertical hydro-turbine generator of the submersible generator according to claim 1, Features: A guide vane (20121) is arranged inside the shell (210), a connecting plate (20142) is arranged on the surface of the shell (210), a pin shaft 1 (20145) is arranged inside the connecting plate (20142), an ear handle seat (20143b) is arranged on the surface of the shell (210), an oil cylinder (20143) is arranged on the surface of the ear handle seat (20143b), and an output shaft of the oil cylinder (20143) is provided with a control ring ear handle seat (20141a).

3. The variable speed vertical hydro-turbine generator of the submersible generator according to claim 2, Features: An upper fixing ring (2013) is arranged on the surface of the guide vane (20121), a guide vane shaft (2015) is arranged inside the guide vane (20121), a vane rotating mechanism (2014) is arranged at the bottom end of the guide vane (20121), the guide vane shaft (2015) penetrates downward through the vane rotating mechanism (2014), a wheel chamber (2011) is arranged on the surface of the vane rotating mechanism (2014), a guide vane group (2012) is arranged inside the guide vane (20121), a control ring (20141) is arranged at the bottom end of the left guide vane (20121), and a pin shaft 2 (20124) is arranged at the top end of the vane rotating mechanism (2014).

4. The variable speed vertical hydro-turbine generator of the submersible generator according to claim 1, Features: The water turbine adopts an axial flow water turbine without a seat ring structure; the stator (101) and the support cover (202) are connected together, and a sealing component (209) is provided between the joint surfaces.

5. The variable speed vertical hydro-turbine generator of the submersible generator according to claim 1, Features: The junction box (103) is of fully sealed design, and a sealing gasket is provided between the junction box (103) and the stator frame junction box seat (103a).

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