A three jet Francis turbine

Abstract

The utility model belongs to the technical field of water turbine, and disclose a kind of three spray horizontal water turbine, including water inlet portion, casing, machine base assembly, rotating portion, generator, impact governor and machine body assembly, the one end of water inlet portion is connected with water distribution portion, the three sides of casing are respectively equipped with upper spray pipe assembly, middle spray pipe assembly and lower spray pipe assembly;Change flow by high-pressure force driver to drive spray needle, to realize water flow and runner fully effect with small diameter working runner, to improve energy conversion efficiency, to increase impact force output greater power, meet large-scale power demand;Through the setting of upper spray pipe assembly, middle spray pipe assembly and lower spray pipe assembly, to guarantee that working runner is stressed smoothly, by impact governor combined with microprocessor independent control spray pipe and fold direction operating mechanism, without coordination mechanism, to be able to flexible adjustment adapt complex working condition, maintain efficient operation.

Description

Technical Field

[0001] This utility model belongs to the field of water turbine technology, specifically a three-jet horizontal water turbine. Background Technology

[0002] Due to its unique working principle, the impulse turbine's runner is not submerged in water. Compared with other types of turbines, it performs better in terms of cavitation and wear. It also has many advantages such as compact layout, simple structure, convenient maintenance and management, less site excavation, and reliable operation. Therefore, it occupies a large market share in the turbine industry.

[0003] Existing impulse turbines, because their runners are not submerged in water, do not have the issue of suction head, thus exhibiting less cavitation and wear compared to other turbines. They also possess advantages such as compact layout, simple structure, convenient maintenance and management, minimal site excavation, and reliable operation, occupying a large market share. However, among horizontal shaft impulse turbines, single-jet and double-jet models are the most common and widely used. Three-jet models are not yet available in China because their structure is too large and complex, difficult to arrange, and uneconomical. However, with the expanding application range of impulse turbine units… The market demand has changed significantly. On the one hand, for some high-head, high-flow-rate applications, mixed-flow turbines were previously used. However, mixed-flow turbines have problems such as complex structure, high installation accuracy requirements, and large tailrace excavation. After comprehensive demonstration, impulse turbines were used in some high-head, high-flow-rate areas where mixed-flow turbines were used. On the other hand, the energy conversion efficiency and output power of single-jet and double-jet turbines can no longer meet the requirements of the current market when facing new high-head, high-flow-rate demands. Therefore, a three-jet horizontal turbine is proposed to solve the problems mentioned in the background technology. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a three-jet horizontal water turbine, which has the advantages of higher energy conversion efficiency, greater output, and better operational stability.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a three-jet horizontal water turbine, comprising a water inlet section, a casing, a base assembly, a rotating section, a generator, an impulse governor, and a body assembly. One end of the water inlet section is connected to a water distribution pipe. The casing is respectively equipped with an upper spray pipe assembly, a middle spray pipe assembly, and a lower spray pipe assembly on its three sides, and each of the three is provided with a deflection operating mechanism at one end of the water distribution pipe. The output shaft end of the generator is fixedly connected to a working impeller, and a counterweight ball valve is provided at the water flow channel of the water inlet section.

[0006] The working impeller is located in the middle of the inner cavity of the machine housing and transmits torque through a flat key. The water inlet section, water distribution pipe, upper spray pipe assembly, middle spray pipe assembly and lower spray pipe assembly are connected to the machine housing.

[0007] The flow rates of the upper nozzle assembly, middle nozzle assembly, and lower nozzle assembly are changed by moving the nozzle needle through a high-pressure relay.

[0008] No coordination mechanism is required between the deflection mechanism and the upper nozzle assembly, middle nozzle assembly, and lower nozzle assembly.

[0009] The main body assembly provides stable support for the entire water turbine.

[0010] The impulse governor is connected to the nozzle relay and deflection mechanism of the water turbine via oil pipes, and the microprocessor controls the operation of each relay.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention uses a high-voltage relay to drive the nozzle to change the flow rate, and a small-diameter working impeller to achieve full interaction between the water flow and the impeller, thereby improving energy conversion efficiency and increasing the impact force to output greater power to meet large-scale power demand. The design of the upper, middle and lower nozzle assembly ensures stable force on the working impeller. The impact speed regulator combined with the microprocessor independently controls the nozzle and the deflection mechanism, eliminating the need for a coordinating mechanism. This allows for flexible adjustment to adapt to complex working conditions and maintain high-efficiency operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the side structure of the present invention (one of the schematic diagrams); Figure 2 This is a schematic diagram of the side structure of the present invention (second one); Figure 3 This is a top view of the overall structure of this utility model.

[0013] In the diagram: 1. Water inlet section; 2. Water distribution pipe; 3. Upper spray pipe assembly; 4. Middle spray pipe assembly; 5. Lower spray pipe assembly; 6. Deflecting operating mechanism; 7. Working wheel; 8. Machine housing; 9. Machine base assembly; 10. Rotating part; 11. Generator; 12. Counterweight ball valve; 13. Impact speed regulator; 14. Machine body assembly. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figures 1 to 3 As shown, this utility model provides a three-jet horizontal water turbine, including a water inlet section 1, a casing 8, a base assembly 9, a rotating section 10, a generator 11, an impulse speed governor 13, and a body assembly 14. One end of the water inlet section 1 is connected to a water distribution pipe 2. The casing 8 is equipped with an upper spray pipe assembly 3, a middle spray pipe assembly 4, and a lower spray pipe assembly 5 on its three sides, and each of the three sides is provided with a deflection operating mechanism 6. The output shaft end of the generator 11 is fixedly connected to a working impeller 7. A counterweight ball valve 12 is provided at the water flow channel of the water inlet section 1.

[0016] like Figures 1 to 3 As shown, the working impeller 7 is located in the middle of the inner cavity of the casing 8 and transmits torque through a flat key. The water distribution pipe 2 is connected to the water inlet section 1 and is connected to the casing 8. The flow rates of the upper nozzle assembly 3, the middle nozzle assembly 4 and the lower nozzle assembly 5 are changed by the high-pressure relay driving the nozzle needle to move. The deflection operation mechanism 6 does not require a coordination mechanism with the upper nozzle assembly 3, the middle nozzle assembly 4 and the lower nozzle assembly 5. The body assembly 14 provides stable support for the entire turbine. The upper nozzle assembly 3, the middle nozzle assembly 4 and the lower nozzle assembly 5 are respectively connected to the water distribution pipe 2. The impulse speed governor 13 is connected to the turbine's nozzle relay and the deflection operation mechanism 6 through oil pipes, and the microprocessor controls the operation of each relay.

[0017] The above scheme is adopted: the water inlet section 1 and the water distribution pipe 2 are respectively connected to the three spray pipes to form a complete water flow channel in the device, so that the water flow can more smoothly perform work on the working wheel 7.

[0018] The working principle and usage process of this utility model are as follows: The high-voltage relay drives the nozzle to move and change the flow rate, converting the energy of water into mechanical energy, which is then converted into electrical energy by a generator. Because the machine is equipped with an impulse speed governor 13, which is connected to the nozzle relay and deflection mechanism 6 of the water turbine through an oil pipe, no coordination mechanism is required between the nozzles and the deflection mechanism 6.

[0019] This device can use a smaller diameter impeller 7 to transfer the kinetic energy of the water flow to the generator, thereby making the interaction between the water flow and the impeller 7 more complete, thus improving energy conversion efficiency. At the same time, it sprays more water flow, providing greater impact force to the impeller 7, thus enabling the unit to output greater power. Under the same head and flow conditions, the diameter of the impeller 7 is reduced, which can meet larger-scale power demand or drive larger equipment. Through the cooperation of the upper nozzle assembly 3, the middle nozzle assembly 4 and the lower nozzle assembly 5, the impact force of the water flow on the impeller 7 is made more stable. When one nozzle fails or the flow changes, the other nozzles can still maintain a certain impact force to maintain the stable operation of the unit. Subsequently, by adjusting the opening and flow of different nozzles, it can more flexibly adapt to different head, flow and load changes. Under some complex hydraulic conditions or large load fluctuations, it can better adjust the operating status and maintain efficient operation.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three jet Francis turbine comprising of a water inlet portion (1), a casing (8), a frame assembly (9), a runner portion (10), a generator (11), a Pelton governor (13) and a body assembly (14), characterized in that: One end of the water inlet section (1) is connected to a water distribution pipe (2). The three sides of the housing (8) are respectively equipped with an upper spray pipe assembly (3), a middle spray pipe assembly (4) and a lower spray pipe assembly (5), and one end of each of the three sides is provided with a deflection operation mechanism (6). The output shaft end of the generator (11) is fixedly connected to a working wheel (7), and a counterweight ball valve (12) is provided at the water flow channel of the water inlet section (1).

2. The triple-jet Francis turbine according to claim 1, characterized in that: The working wheel (7) is located in the middle of the inner cavity of the housing (8) and transmits torque through a flat key. The water distribution pipe (2) is connected to the water inlet part (1) and communicates with the housing (8).

3. The triple-jet Francis turbine of claim 1, wherein: The flow rates of the upper nozzle assembly (3), the middle nozzle assembly (4), and the lower nozzle assembly (5) are changed by moving the nozzle needle through a high-pressure relay.

4. The triple-jet Francis turbine of claim 1, wherein: No coordination mechanism is required between the deflection operation mechanism (6) and the upper nozzle assembly (3), the middle nozzle assembly (4) and the lower nozzle assembly (5).

5. The triple-jet Francis turbine of claim 1, wherein: The body assembly (14) provides support for the entire turbine, and the upper nozzle assembly (3), the middle nozzle assembly (4) and the lower nozzle assembly (5) are respectively connected to the water distribution pipe (2).

6. The triple-jet Francis turbine of claim 1, wherein: The impulse governor (13) is connected to the nozzle relay and deflection operation mechanism (6) of the water turbine through oil pipes, and the microprocessor controls the operation of each relay.

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