Radiation type base of impulse turbine and mounting method of radiation type base

Abstract

The invention relates to the technical field of water turbine bases, and discloses an impulse water turbine radiation type base which comprises a center body of a polygonal structure, supporting arms and adjustable supporting assemblies, each side of the center body is detachably connected with the corresponding supporting arm, the supporting assemblies are arranged below the ends of the supporting arms, and the lower portions of the supporting arms are fixedly connected with top linings. The installation method of the radiation type base of the impulse turbine comprises the following steps that all supporting end flanges of the center body are connected with the supporting arms and then placed on an embedded foundation, and then the adjusting assemblies are placed below the supporting arms; measuring equipment is erected on the center body, and adjusting screw rods below the end parts of the supporting arms are adjusted, so that the flange elevation and the center of the center body meet the design requirements; splicing and welding the split top lining below the supporting arm, splicing the pit lining, and welding the spliced pit lining and the top lining above into a whole; and finally, a concrete formwork is erected, and concrete is poured. On the premise of ensuring the strength, the weight of the base body can be effectively reduced, the deformation is small, and the installation precision is high.

Description

Technical Field

[0001] This invention relates to the field of turbine base technology, and specifically to a radial base for an impulse turbine. Background Technology

[0002] The vertical impulse turbine base is one of the main components of a hydro turbine. It bears the radial force of the water guide bearings during the operation of the turbine-generator unit, supports the main shaft seal and bearings, and, as part of the runner chamber, withstands the impact of high-speed jet water. Furthermore, during unit maintenance and repair, it bears the weight of core components such as the turbine runner and main shaft, playing a crucial role in the safe and stable operation of the unit.

[0003] Traditional vertical impulse turbine bases use a welded steel plate integral structure, such as... Figure 1 As shown, due to the large overall dimensions of the base, it is generally divided into two or more segments due to the influence of transportation dimensions. The joint surfaces of the segments must be precision machined. Due to the large and irregular dimensions of the workpiece, the production and processing links such as welding and machining are relatively difficult. During the installation of the power station, bolts are needed to connect the segments into a whole. On-site connection requires correction of the deformation of the cover, which affects the installation accuracy. Summary of the Invention

[0004] To address the technical problem of reducing construction difficulty while minimizing volume and improving precision, this invention provides a radial base for an impulse turbine. The base comprises a polygonal central body, support arms, and an adjustable support assembly. Each side of the central body is detachably connected to the support arm. The support assembly is located below the end of each support arm, and a top liner is fixedly connected below the support arm.

[0005] Preferably, the central body has a four-sided or hexagonal structure, and the support arms are evenly arranged radially in all directions on the central body.

[0006] To facilitate connection and further reduce the volume ratio, the connection end between the central body and the support arm is an outwardly convex end.

[0007] To adjust the installation elevation and level of the center body, the support assembly includes an adjusting screw, a nut, and a bracket. The adjusting screw is positioned above the bracket, and a nut that can be locked up and down is provided on the adjusting screw.

[0008] To improve overall strength, a reinforcing plate is also provided above the bracket, and the reinforcing plate is located on both sides of the adjusting screw.

[0009] A method for installing a radial base for an impulse turbine includes the following steps: Step 1: After connecting the flanges at each support end of the central body to the support arm, place it on the pre-embedded foundation. Then, connect the adjusting screw, nut, and bracket together and place them below the end of the support arm. Step 2: Set up measuring equipment on the upper flange surface of the center body, adjust the adjusting screw below the end of the support arm to ensure that the axis and center of the center body meet the specifications and design requirements, lock the adjusting nut and spot weld it, and weld the reinforcing plates to both sides of the bracket respectively. Step 3: Connect and reinforce the bracket, support arm and pre-embedded foundation. Then weld the segmented top lining to the bottom of the support arm. After splicing the pit lining, weld it to the top lining above to form a whole. Step 4: Finally, after reinforcing the top lining, the pit lining, and the embedded foundation, erect the concrete formwork and pour the concrete.

[0010] The present invention has the following beneficial effects: 1. This invention employs a radial base structure. Compared to an integral base structure, the central body structure, through optimized material distribution, effectively reduces the weight of the base body while ensuring strength. It can withstand sufficiently large loads with less material, thus fundamentally saving costs. The small external dimensions of the central body reduce the amount of welding, effectively minimizing deformation and improving positioning accuracy. This facilitates adjustments during unit installation and ensures installation precision, significantly reducing vibration and sway. Furthermore, the radial layout of the central body allows surrounding components to be arranged in an orderly manner, reducing redundant space and facilitating the placement of other auxiliary equipment and subsequent unit maintenance and replacement.

[0011] 2. The central body of the present invention serves as the core support, which can evenly distribute the load to various parts, reduce stress concentration, and improve the overall structure's resistance to deformation. Attached Figure Description

[0012] Figure 1 A schematic diagram of a traditional vertical impulse turbine base; Figure 2 This is a schematic diagram of an embodiment of the radial base of the impulse turbine of the present invention; Figure 3 This is a cross-sectional view of an embodiment of the radial base of the impulse turbine of the present invention; Figure 4 for Figure 3 A schematic diagram of the supporting components. Detailed Implementation

[0013] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: central body 1, protruding end 2, bolt 3, support arm 4, adjusting screw 5, double nut structure 6, bracket 7, reinforcing plate 8, top liner 9, machine pit liner 10, machine base 11, split surface 12.

[0014] Example 1 like Figure 2-4 As shown, a radial base for an impulse turbine includes a hexagonal central body 1, support arms 4, and an adjustable support assembly. Each side of the central body 1 has an outwardly protruding end 2. The flange end face of the outwardly protruding end 2 is detachably connected to the support arm 4 by bolts 3. The support arm 4 is evenly radially arranged on the central body 1. The support assembly is arranged below the end of the support arm 4. A top liner 9 is fixedly connected below the support arm 4.

[0015] The support assembly includes an adjusting screw 5, a double nut structure 6, and a bracket 7. The adjusting screw 5 is disposed above the bracket 7, and the adjusting screw 5 is provided with a double nut structure 6 that can be locked up and down.

[0016] A reinforcing plate 8 is also provided above the bracket 7, and the reinforcing plate 8 is located on both sides of the adjusting screw 5.

[0017] A method for installing a radial base for an impulse turbine includes the following steps: Step 1: After connecting the flanges at each support end of the central body 1 to the support arm 4, place it on the pre-embedded foundation. Then, combine and connect the adjusting screw 5, the double nut structure 6, and the bracket 7 together and place them below the end of the support arm 4. Step 2: Set up measuring equipment on the upper flange surface of the center body 1, adjust the adjusting screw 5 below the end of the support arm 4 to ensure that the axis and center of the center body 1 meet the specifications and design requirements, lock the double nut structure 6 and spot weld it, and weld the reinforcing plate 8 to both sides of the bracket 7 respectively. Step 3: Connect and reinforce the bracket 7 and support arm 4 to the pre-embedded foundation. Then, weld the segmented top liner 9 to the bottom of the support arm 4. Finally, splice the pit liner 10 and weld it to the top liner 9 above to form a whole. Step 4: Finally, after reinforcing the top lining 9, the pit lining 10, and the embedded foundation, erect the concrete formwork and pour the concrete.

[0018] The base of this embodiment adopts a radial base structure composed of the central body 1 and several support arms 4. The central body 1 serves as the core support, and the load is evenly transferred to the concrete foundation through each support arm 4. While ensuring strength, the weight of the base body can be effectively reduced. A sufficiently large load can be borne with less material, thereby fundamentally saving costs. In addition, since the central body 1 has a small external size, the processing difficulty is reduced while ensuring processing accuracy.

[0019] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A radial base for an impulse turbine, characterized in that, It includes a polygonal central body, support arms, and an adjustable support assembly. Each side of the central body is detachably connected to the support arm. The support assembly is located below the end of the support arm, and a top liner is fixedly connected below the support arm.

2. The radial base of the impulse turbine according to claim 1, characterized in that: The central body has a four-sided or hexagonal structure, and the support arms are evenly arranged radially in all directions on the central body.

3. The radial base of the impulse turbine according to claim 2, characterized in that: The connection end between the central body and the support arm is an outwardly convex end.

4. The radial base of the impulse turbine according to claim 3, characterized in that: The support assembly includes an adjusting screw, a nut, and a bracket. The adjusting screw is positioned above the bracket, and a nut that can be locked up and down is provided on the adjusting screw.

5. The radial base of the impulse turbine according to claim 4, characterized in that: A reinforcing plate is also provided above the bracket, and the reinforcing plate is located on both sides of the adjusting screw.

6. The method for installing the radial base of an impulse turbine according to claim 5, characterized in that, Includes the following steps: Step 1: After connecting the flanges at each support end of the central body to the support arm, place it on the pre-embedded foundation. Then, connect the adjusting screw, nut, and bracket together and place them below the end of the support arm. Step 2: Set up measuring equipment on the upper flange surface of the center body, adjust the adjusting screw below the end of the support arm to ensure that the axis and center of the center body meet the specifications and design requirements, lock the adjusting nut and spot weld it, and weld the reinforcing plates to both sides of the bracket respectively. Step 3: Connect and reinforce the bracket, support arm and pre-embedded foundation. Then weld the segmented top lining to the bottom of the support arm. After splicing the pit lining, weld it to the top lining above to form a whole. Step 4: Finally, after reinforcing the top lining, the pit lining, and the embedded foundation, erect the concrete formwork and pour the concrete.

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