High-strength tubular seat for water-turbine generator set

Abstract

A high-strength tubular seat for a water-turbine generator set relates to the field of tubular seats and comprises an outer tubular shell and an inner tubular shell mounted in the outer tubular shell, through holes are formed in the center of the outer tubular shell and the center of the inner tubular shell respectively, vertical supporting portions are fixedly arranged on the upper side and the lower side of the outer tubular shell respectively, and the vertical supporting portions are fixedly connected with the outer tubular shell. The conical shell is used for guiding water flow to flow stably, turbulent fluctuation and vortex of the water flow are reduced, hydraulic loss is reduced, and the water energy conversion efficiency is improved. Meanwhile, the conical geometrical shape can effectively disperse water flow pressure and unit operation load, the stress concentration phenomenon is reduced, the vertical supporting part bears unit loads in the vertical direction and the unit axis direction to improve the structural rigidity, the horizontal supporting plate provides transverse supporting force, and the overall stability of the tubular base is enhanced; and transverse impact force of water flow and horizontal vibration during operation of the unit are effectively resisted.

Description

Technical Field

[0001] This utility model relates to the field of tubular seats, and in particular to a high-strength tubular seat for hydro turbine generator sets. Background Technology

[0002] The tubular support is a crucial supporting structure for axial-flow turbine generator sets. The unit's self-weight, hydraulic load, and mechanical load are all transferred to the concrete through the tubular support, which also optimizes the water flow pattern to improve energy conversion efficiency. Traditional tubular supports often employ a cylindrical shell welded with uniformly distributed stiffening plates, leading to:

[0003] Insufficient hydraulic performance: Cylindrical flow channels are prone to causing flow separation and eddies, leading to increased hydraulic losses (typical efficiency losses of about 3% to 5%).

[0004] Structural strength limitations: An unreasonable stiffener layout can easily lead to stress concentration (such as the stress peak at the weld can reach 80% of the material's yield strength), and fatigue cracking is likely to occur during long-term operation;

[0005] Weak resistance to deformation: The single-direction support structure is difficult to withstand complex loads, and the shell deflection often exceeds 2mm / m during operation, affecting the accuracy of the unit's axis.

[0006] While existing technologies have attempted to improve the situation by increasing the shell thickness (e.g., from 20mm to 30mm) or optimizing the number of stiffeners (e.g., from 8 to 12), this results in a 10% to 15% increase in weight and does not fundamentally improve the flow pattern and stress distribution. Therefore, there is an urgent need for a pipe seat design that combines high hydraulic efficiency, strong structural stability, and ease of maintenance. Utility Model Content

[0007] The purpose of this invention is to provide a high-strength tubular base for hydro-generator sets to solve the problems mentioned in the background art.

[0008] The technical problem solved by this utility model is achieved through the following technical solution:

[0009] A high-strength tubular base for a hydro-generator set includes an outer tubular shell and an inner tubular shell installed inside the outer tubular shell. The outer tubular shell and the inner tubular shell are respectively provided with through holes at their centers. Vertical support parts are respectively fixedly provided on the upper and lower sides of the outer tubular shell. Horizontal support plates are respectively fixedly provided on the left and right sides of the outer end of the outer tubular shell to ensure the accuracy of the generator set's axis and the stability in the horizontal direction.

[0010] Preferably, the cross-section of the vertical support is arranged in an isosceles trapezoidal shape, which reduces stress concentration and improves the structure's resistance to deformation during the main operation of the turbine.

[0011] Preferably, the vertical support has an extension plate on the front end face away from the outer tubular shell, which further improves the stability of the longitudinal installation structure.

[0012] Preferably, a connecting flange is provided on the conical tip of the front end of the outer tubular shell.

[0013] Preferably, the horizontal support plate is perpendicular to the outer conical surface of the outer tubular shell to ensure the stability of the structure in the horizontal direction.

[0014] The advantages and positive effects of this utility model are:

[0015] This invention guides water flow smoothly through a conical shell, reducing turbulence and eddies, minimizing hydraulic losses, and improving water energy conversion efficiency. Simultaneously, the conical geometry effectively disperses water pressure and unit operating loads, reducing stress concentration, enhancing the shell's resistance to pressure and deformation, and extending equipment lifespan. The vertical support section bears the unit's vertical and axial loads, increasing structural rigidity and reducing operational deformation. The horizontal support plate provides lateral support, enhancing the overall stability of the tubular base, effectively resisting lateral water impact and horizontal vibrations during unit operation, facilitating installation and positioning, ensuring unit axial accuracy, providing a benchmark for precision assembly, and forming a three-dimensional support system with the vertical support section. This strengthens the tubular base's anti-overturning capability and ensures stable unit operation. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of a high-strength tubular base for a hydro-generator set according to the present invention;

[0018] Figure 2 This is a schematic diagram of the main structure of a high-strength tubular base for a hydro-generator set according to the present invention;

[0019] Figure 3 This is a top view schematic diagram of a high-strength tubular base for a hydro-generator set according to the present invention;

[0020] Figure 4 This is a left-side view of the high-strength tubular base for a hydro-generator set according to this utility model.

[0021] The markings in the attached drawings are described as follows: outer tubular shell 10; connecting flange 11; horizontal support plate 12; vertical support 13; extension plate 14; inner tubular shell 15. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in an illustrative manner. Therefore, they only show the components related to the present invention.

[0023] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0024] The following is combined Figure 1-4 This utility model will be described in detail below. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The directions of front, back, left, right, up, and down in the view are consistent. Figure 1 The directions shown are consistent with the front-facing, back-facing, left-right, up-down directions of the device.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of at least two elements or the interaction relationship of at least two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0027] Please see Figure 1-4This utility model provides an embodiment of a high-strength tubular base for a hydro-generator set, comprising a conical main tube housing, wherein the main tube housing is divided into an outer tubular housing 10 and an inner tubular housing 15. The inner tubular housing 15 is installed inside the outer tubular housing 10. The outer tubular housing 10 and the inner tubular housing 15 are respectively provided with through holes at their centers. A connecting flange 11 is provided on the conical tip of the front end of the outer tubular housing 10 to achieve quick assembly and disassembly. The gradually expanding or contracting shape of the conical housing can guide the water flow to flow smoothly, reduce water flow turbulence and eddies, reduce hydraulic losses, and improve water energy conversion efficiency. For example, through a reasonable cone angle design, the water flow is evenly applied to the impeller blades, making full use of water energy. At the same time, the conical geometry can effectively disperse the water flow pressure and the unit's operating load, reducing stress concentration, improving the shell's resistance to pressure and deformation, and extending the equipment's service life. Vertical support parts 13 are fixedly installed on the upper and lower sides of the outer tubular shell 10, bearing the unit's vertical load (such as the equipment's own weight and the vertical pressure of the water flow) and the unit's axial load (such as the axial pressure of the water flow), improving structural rigidity and reducing operational deformation. Horizontal support plates 12 are fixedly installed on the left and right sides of the outer end of the outer tubular shell 10 to ensure the horizontal stability of the unit's axis. The horizontal support plates 12 are perpendicular to the conical surface of the outer end of the outer tubular shell 10, providing lateral support force, enhancing the overall stability of the tubular seat, effectively resisting the lateral impact force of the water flow and the horizontal vibration during unit operation, facilitating installation and positioning, ensuring the accuracy of the unit's axis, providing a benchmark for precise equipment assembly, and forming a three-dimensional support system with the vertical support parts 13, strengthening the tubular seat's anti-overturning ability, and ensuring stable unit operation.

[0028] It is worth mentioning that, in this embodiment, the cross-section of the vertical support 13 is arranged in an isosceles trapezoid, which reduces stress concentration during the main operation of the turbine and improves the structural resistance to deformation. At the same time, an extension plate 14 is provided on the front end face of the vertical support 13 on the side away from the outer tubular shell 10, which further improves the stability of the longitudinal installation structure.

[0029] In practice, after installation, ensure the integrity of the flow passage and the unit system. Water flows into the unit through the streamlined flow passage (spherical body) of the pipe-type seat, driving the impeller to rotate. The flow passage optimizes the water flow pattern, reduces hydraulic loss, and improves the efficiency of water energy conversion into mechanical energy. The horizontal support plate and the vertical support structure work together to withstand the water flow impact force, equipment vibration load and its own weight during unit operation. The rigid support maintains the stability of the unit axis and reduces the risk of deformation and vibration.

[0030] It should be emphasized that the embodiments described in this utility model are illustrative and not limiting. Therefore, this utility model is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this utility model are also within the scope of protection of this utility model.

Claims

1. A high-strength tubular stay for a hydroelectric generating unit, characterized by: The utility model relates to a water turbine generator set vertical installation structure, including outer tubular shell (10) with install inside the inner tubular shell (15) of outer tubular shell (10), outer tubular shell (10) with inner tubular shell (15) are conical, form conical shell flow channel, the center of outer tubular shell (10) with the inner tubular shell (15) is provided with through -hole respectively, the upper and lower sides of outer tubular shell (10) are fixedly provided with vertical support part (13) respectively, the outer end of outer tubular shell (10) is fixedly provided with the horizontal support plate (12) of ensuring unit axis levelness at left and right sides position respectively, the front end face of vertical support part (13) is provided with extension plate part (14) on the side direction away from outer tubular shell (10), further improve the stability of longitudinal installation structure.

2. A high-strength tubular stay for a hydroelectric generator set according to claim 1, characterized in that: The vertical support part (13) is isosceles trapezoidal in cross section, which reduces stress concentration during the main operation of the water turbine and improves the structural deformation resistance.

3. A high-strength tubular bearing for a hydroelectric generator set according to claim 2, characterized in that: The outer tubular shell (10) is provided with a connecting flange (11) on the conical tip of the front end.

4. A high-strength tubular bearing for a hydroelectric generator set according to claim 3, characterized in that: The horizontal support plate (12) is perpendicular to the outer end conical surface of the outer tubular shell (10), ensuring the stability of the water surface installation structure.

Images