Anti-earthquake loosening bolt modification scheme suitable for lower rack of hydro-generator

Abstract

The invention discloses an anti-seismic loosening bolt modification scheme suitable for a lower rack of a hydro-generator, a sliding groove is defined by a mounting seat, and the inner surface of the sliding groove is a cambered surface; the mounting piece comprises a head part and a connecting part, one end of the connecting part is connected with the head part, the connecting part is connected with a rack of the water-turbine generator set, and at least part of the head part is matched with the inner surface of the sliding groove and is movably arranged in the sliding groove; a containing space is defined by the installation shell, the connecting part penetrates through the containing space, at least part of the elastic piece is contained in the containing space, and at least part of the elastic piece is located between the connecting part and the wall face of the containing space. Therefore, when the rack deviates slightly, the elastic piece can absorb energy through elastic deformation and drive the rack to reset, the anti-interference capability and the operation stability of the water-turbine generator set are improved, the concentricity and the stability of a generator shaft system are improved, and the shock resistance is improved; and stress concentration at the root of the mounting piece can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of generator technology, and in particular to a modified solution for earthquake-resistant loosening bolts suitable for the lower frame of a hydro generator. Background Technology

[0002] In related technologies, the traditional method of fixing the lower frame of a hydro-generator unit is a rigid connection. This involves embedding one end of a high-strength, large bolt deep into the concrete and the other end passing through the support leg (or support plate) of the lower frame before being tightened with a huge nut. During an earthquake, seismic energy is transferred to the bolt, causing a high concentration of stress and making the nut prone to loosening. When the bolt is subjected to stress exceeding its yield strength, it may be damaged (e.g., plastic elongation or fracture), reducing the reliability of the hydro-generator unit. Furthermore, earthquakes can easily cause the lower frame of the hydro-generator unit to shift. This shift is irreversible, resulting in poor concentricity and stability of the generator shaft system, which in turn leads to increased vibration and sway of the hydro-generator unit, reducing its seismic resistance. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of this invention is to propose a modified solution for earthquake-resistant loosening bolts on the lower frame of a hydro-generator, which can improve the anti-interference capability and operational stability of the hydro-generator unit, improve the concentricity and stability of the generator shaft system, enhance seismic resistance, and improve the reliability of the hydro-generator unit.

[0004] The modified earthquake-resistant loosening bolt solution for the lower frame of a hydro-generator according to the present invention includes: a mounting base, a mounting component, a mounting shell, and an elastic element. The mounting base defines a sliding groove, the inner surface of which is arc-shaped. The mounting component includes: a head and a connecting portion. One end of the connecting portion is connected to the head and the connecting portion is adapted to connect to the frame of the hydro-generator set. At least a portion of the head is adapted to the inner surface of the sliding groove and is movably disposed within the sliding groove. The mounting shell defines a receiving space, the connecting portion passes through the receiving space, and at least a portion of the elastic element is received within the receiving space, the at least portion of which is located between the connecting portion and the wall of the receiving space.

[0005] According to the modified design of the anti-seismic loosening bolt for the lower frame of the hydro-generator of the present invention, when the frame is slightly offset, the elastic element can absorb energy through elastic deformation and drive the frame to reset, thereby improving the anti-interference ability and operational stability of the hydro-generator set, improving the concentricity and stability of the generator shaft system, improving the seismic resistance, and the head can move in the groove, which can effectively avoid stress concentration at the root of the mounting part and improve the reliability of use.

[0006] In some examples of the present invention, the elastic element is constructed as a spherical spring, and the connecting portion passes through the spherical spring.

[0007] In some examples of the present invention, the modified solution for earthquake-resistant loosening bolts applicable to the lower frame of a hydro generator further includes: a connector, wherein the spherical spring is connected to the mounting shell through the connector.

[0008] In some examples of the present invention, the elastic element is a plurality of helical springs arranged around the connecting portion, and the two ends of the elastic element are respectively connected to the connecting portion and the wall of the receiving space.

[0009] In some examples of the present invention, the head includes: a first sub-part and a second sub-part, one end of the connecting part is connected to the first sub-part, the connecting part and the first sub-part together form a bolt, the second sub-part is sleeved on the first sub-part, and at least a portion of the second sub-part is adapted to the inner surface of the slide groove and is movably disposed within the slide groove.

[0010] In some examples of the present invention, the groove is constructed as a hemispherical groove, and the second sub-part is constructed as a hemispherical structure.

[0011] In some examples of the present invention, the modified solution for anti-seismic loosening bolts applicable to the lower frame of a hydro generator further includes: a load-bearing component, wherein the mounting base is placed on the load-bearing component and is movable along the extension direction perpendicular to the connection portion.

[0012] In some examples of the present invention, the support assembly includes: a support box and a support member, the support member being rotatably placed inside the support box, and the mounting base being placed on the support member such that the mounting base is movable in a direction perpendicular to the extension direction of the connection portion.

[0013] In some examples of the present invention, the carrier is constructed as a sliding ball.

[0014] In some examples of the present invention, the bottom wall of the carrier box is formed with grooves, the number of grooves corresponding to and adapted to the sliding balls, and a portion of the structure of the sliding balls is received in the corresponding grooves and is rotatable relative to the grooves; And / or, the bottom wall of the carrier box is made of metal.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural schematic diagram of the modified anti-earthquake loosening bolt scheme applicable to the lower frame of a hydro generator according to an embodiment of the present invention; Figure 2 This is a perspective view of the modified earthquake-resistant loosening bolt scheme for the lower frame of a hydro generator, as described in an embodiment of the present invention.

[0017] Figure label: Mounting base 1; Slide groove 11; Mounting part 2; Head 21; Second sub-part 211; Connecting part 22; Mounting shell 3; Reception space 31; Elastic element 4; Connector 5; Support component 6; support box 61; support element 62. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] The following is for reference. Figure 1 and Figure 2 This invention describes a modified design for earthquake-resistant loosening bolts on the lower frame of a hydro generator, according to an embodiment of the present invention.

[0020] like Figure 1 As shown, the modified anti-seismic loosening bolt scheme for the lower frame of a hydro-generator according to an embodiment of the present invention includes: a mounting base 1, a mounting component 2, a mounting shell 3, and an elastic component 4. The mounting base 1 defines a sliding groove 11, the inner surface of which is arc-shaped. The mounting component 2 includes a head 21 and a connecting portion 22. One end of the connecting portion 22 is connected to the head 21 and the connecting portion 22 is adapted to connect to the frame of the hydro-generator set. At least a portion of the head 21 is adapted to the inner surface of the sliding groove 11 and is movably disposed within the sliding groove 11. The mounting shell 3 defines a receiving space 31. The connecting portion 22 passes through the receiving space 31. At least a portion of the elastic component 4 is received within the receiving space 31, and at least a portion of the elastic component 4 is located between the connecting portion 22 and the wall of the receiving space 31.

[0021] The mounting base 1 defines a slide groove 11, the inner surface of which is an arc surface. As some embodiments of this application, the slide groove 11 can be constructed as a hemispherical groove, and the inner surface of the slide groove 11 can be constructed as a hemispherical arc surface.

[0022] One end of the connecting portion 22 is connected to the head 21, and the connecting portion 22 is adapted to be connected to the frame of the hydro-generator unit. As some embodiments of this application, along the extending direction of the connecting portion 22 (i.e. Figure 1 (As shown in the X direction), the connecting part 22 has two opposing ends, one end of which is connected to the head 21, and the other end is adapted to be connected to the frame of the hydro-generator unit. As some embodiments of this application, the connection method between the connecting part 22 and the head 21 can be, but is not limited to, welding connection, snap-fit ​​connection, etc., or the connecting part 22 and the head 21 can be integrally formed. As some embodiments of this application, the connection method between the connecting part 22 and the frame of the hydro-generator unit can be bolted connection. Specifically, one end of the connecting part 22 has an external thread, and a mating hole is formed on the frame of the hydro-generator unit (e.g., the frame's legs or support plates). One end of the connecting part 22 passes through the mating hole and engages with a nut to connect the connecting part 22 to the frame of the hydro-generator unit.

[0023] At least a portion of the head 21 is adapted to the inner surface of the slide groove 11 and is movably disposed within the slide groove 11. As some embodiments of this application, a portion of the head 21 is adapted to the inner surface of the slide groove 11 and is movably disposed within the slide groove 11, or the entire head 21 is adapted to the inner surface of the slide groove 11 and is movably disposed within the slide groove 11.

[0024] As some embodiments of this application, the inner surface of the slide 11 is constructed as an arc surface, and a portion of the head 21 is constructed as an arc-shaped structure (the outer surface of a portion of the head 21 is constructed as an arc surface) and has the same curvature as the inner surface of the slide 11, so that at least a portion of the head 21 is adapted to the inner surface of the slide 11.

[0025] The mounting shell 3 defines a receiving space 31. As some embodiments of this application, the mounting shell 3 may be constructed as a thin-walled structure and define a receiving space 31.

[0026] The connecting portion 22 passes through the receiving space 31. As in some embodiments of this application, along the extending direction of the connecting portion 22 (i.e. Figure 1 (in the X direction shown), the connecting part 22 passes through the receiving space 31, and the two ends of the connecting part 22 extend from opposite ends of the mounting shell 3 respectively.

[0027] At least a portion of the elastic element 4 is housed within the housing space 31. As some embodiments of this application, a portion of the elastic element 4 is housed within the housing space 31, or all of the elastic element 4 is housed within the housing space 31.

[0028] At least a portion of the elastic member 4 is located between the connecting portion 22 and the wall of the receiving space 31. In some embodiments of this application, a portion of the elastic member 4 is located between the connecting portion 22 and the wall of the receiving space 31, or the entire elastic member 4 is located between the connecting portion 22 and the wall of the receiving space 31. In some embodiments of this application, the elastic member 4 is sleeved on the outside of the connecting portion 22, and at least a portion of the elastic member 4 is received within the receiving space 31.

[0029] As some embodiments of this application, the structure mentioned in this solution can be embedded in concrete. As some embodiments of this application, one end of the connecting part 22 is formed with external threads. In the structure mentioned in this solution, except for at least part of the external threads of the connecting part 22, the rest can be embedded in concrete.

[0030] It should be noted that this application defines a slide groove 11 by using a mounting base 1. The inner surface of the slide groove 11 is arc-shaped. One end of the connecting part 22 is connected to the head 21, and the connecting part 22 is adapted to be connected to the frame of the hydro-generator unit. At least a portion of the head 21 is adapted to the inner surface of the slide groove 11 and is movably disposed within the slide groove 11. When an earthquake generates complex horizontal and torsional vibration forces, at least a portion of the head 21 can move within the slide groove 11 in a limited and controllable manner (e.g., but not limited to rotation), thereby effectively reducing stress concentration, thus reducing the risk of damage to the connecting part 22, improving the reliability of the hydro-generator unit, and by using a mounting shell... 3 defines a receiving space 31, with the connecting part 22 passing through the receiving space 31. At least a portion of the elastic member 4 is received within the receiving space 31, and at least a portion of the elastic member 4 is located between the connecting part 22 and the wall of the receiving space 31. When the unbalanced force generated by the earthquake causes the lower frame of the hydro-generator unit to shift, the elastic member 4 can absorb the earthquake energy and undergo elastic deformation, and automatically return to its initial state after the earthquake. At the same time, the elastic member 4 can adaptively adjust according to the intensity and frequency of the actual earthquake to improve the concentricity and stability of the generator shaft system, improve the earthquake resistance and operational stability of the hydro-generator unit, and significantly reduce the maintenance difficulty of the hydro-generator unit.

[0031] Therefore, when the frame experiences a slight misalignment, the elastic element 4 can absorb energy through elastic deformation and drive the frame to reset, thereby improving the anti-interference capability and operational stability of the hydro-generator unit, enhancing the concentricity and stability of the generator shaft system, improving seismic resistance, and allowing the head 21 to move within the slide groove 11, effectively preventing stress concentration at the root of the mounting component 2 and improving reliability.

[0032] As some embodiments of this application, at least a portion of the elastic element 4 is connected between the connecting portion 22 and the wall of the receiving space 31 to effectively improve the concentricity and stability of the generator shaft system, enhance the seismic resistance and operational stability of the hydro-generator unit, and significantly reduce the maintenance difficulty of the hydro-generator unit.

[0033] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the elastic element 4 is constructed as a spherical spring, and the connecting part 22 passes through the spherical spring.

[0034] In some embodiments of this application, a spherical spring is sleeved on the outside of the connecting portion 22, and at least a portion of the spherical spring is housed in the receiving space 31. In some embodiments of this application, at least a portion of the spherical spring is connected between the connecting portion 22 and the wall of the receiving space 31. When the unbalanced force generated by an earthquake causes displacement of the lower frame of the hydro-generator unit, the compressed side of the spherical spring undergoes elastic deformation to absorb the seismic energy. Simultaneously, the tension side of the spherical spring remains connected to the wall of the receiving space 31. The spherical spring can adaptively adjust the degree of deformation according to the actual intensity and frequency of the earthquake. After the earthquake, the elastic potential energy of the spherical spring can drive the structure mentioned in this scheme and the entire hydro-generator unit to return to their initial state, achieving a self-resetting function.

[0035] This configuration improves the concentricity and stability of the generator shaft system, thereby enhancing the seismic resistance and operational stability of the hydro-generator unit.

[0036] In some embodiments of the present invention, such as Figure 1 As shown, the modified design for earthquake-resistant loosening bolts applicable to the lower frame of a hydro-generator also includes: connector 5, with a ball spring connected to the mounting shell 3 via connector 5.

[0037] As some embodiments of this application, the connector 5 may be constructed as a bolt, and the ball spring is connected to the mounting housing 3 by the bolt.

[0038] This design is simple and reasonable, making it easy to connect the spherical spring to the mounting shell 3 to fix the position of the spherical spring.

[0039] In some embodiments of the present invention, there are multiple elastic elements 4 and they are constructed as helical springs. The multiple helical springs are arranged around the connecting part 22, and the two ends of the elastic element 4 are respectively connected to the connecting part 22 and the wall of the receiving space 31.

[0040] Among them, there are multiple elastic elements 4 and they are constructed as helical springs. As some embodiments of this application, the number of elastic elements 4 can be, but is not limited to, three, four, five, etc.

[0041] Multiple helical springs are arranged around the connecting portion 22. In some embodiments of this application, the number of helical springs is four, and the four helical springs are arranged sequentially and at intervals around the connecting portion 22.

[0042] The two ends of the elastic member 4 are respectively connected to the connecting part 22 and the wall of the receiving space 31. As some embodiments of this application, the connection between the two ends of the elastic member 4 and the wall of the connecting part 22 and the receiving space 31 can be a welding connection.

[0043] By arranging multiple helical springs around the connecting part 22, and connecting both ends of the elastic element 4 to the wall of the connecting part 22 and the receiving space 31 respectively, when the unbalanced force generated by the earthquake causes the lower frame of the hydro-generator unit to shift, some of the helical springs are compressed to absorb the earthquake energy, while others are stretched. Furthermore, the multiple helical springs can adaptively adjust the degree of deformation according to the actual intensity and frequency of the earthquake. After the earthquake ends, the elastic potential energy of the helical springs can drive the structure mentioned in this scheme and the entire hydro-generator unit to return to the initial state, thus realizing the self-resetting function.

[0044] This configuration improves the concentricity and stability of the generator shaft system, thereby enhancing the seismic resistance and operational stability of the hydro-generator unit.

[0045] In some embodiments of the present invention, such as Figure 1 As shown, the head 21 includes a first sub-part and a second sub-part 211. One end of the connecting part 22 is connected to the first sub-part. The connecting part 22 and the first sub-part together form a bolt. The second sub-part 211 is sleeved on the first sub-part. At least a portion of the second sub-part 211 is adapted to the inner surface of the slide groove 11 and is movably disposed in the slide groove 11.

[0046] In this embodiment, one end of the connecting part 22 is connected to the first sub-part. As some embodiments of this application, one end of the connecting part 22 and the first sub-part can be welded together or integrally formed. The connecting part 22 and the first sub-part together constitute a bolt.

[0047] The second sub-part 211 is sleeved on the first sub-part. As some embodiments of this application, the second sub-part 211 is sleeved on the first sub-part and welded to the first sub-part.

[0048] At least a portion of the second sub-part 211 is adapted to and movably disposed within the inner surface of the slide groove 11. In some embodiments of this application, a portion of the second sub-part 211 is adapted to and movably disposed within the slide groove 11, or the entire second sub-part 211 is adapted to and movably disposed within the slide groove 11. In some embodiments of this application, at least a portion of the second sub-part 211 can rotate relative to the slide groove 11.

[0049] As some embodiments of this application, the inner surface of the slide groove 11 is constructed as an arc surface, and a portion of the second sub-part 211 is constructed as an arc structure with the same curvature as the inner surface of the slide groove 11, so that at least a portion of the second sub-part 211 is adapted to the inner surface of the slide groove 11.

[0050] By connecting one end of the connecting part 22 to the first sub-part, the connecting part 22 and the first sub-part together form a bolt, and the second sub-part 211 is fitted onto the first sub-part. This makes the structure of the head 21 reasonable and easy to process, thereby reducing the processing difficulty. Furthermore, by adapting at least a portion of the second sub-part 211 to the inner surface of the slide groove 11 and movably disposed within the slide groove 11, stress concentration can be effectively reduced, thereby reducing the risk of damage to the connecting part 22 and improving the reliability of the hydro-generator unit.

[0051] In some embodiments of the present invention, such as Figure 1 As shown, the slide 11 is constructed as a hemispherical groove, and the second sub-part 211 is constructed as a hemispherical structure.

[0052] As some embodiments of this application, the groove 11 can be constructed as a smooth hemispherical groove with high precision and low coefficient of friction, and the second sub-part 211 can be constructed as a high-strength, wear-resistant hemispherical structure, i.e. the arc-shaped structure described above.

[0053] By constructing the slide 11 as a hemispherical groove and the second sub-part 211 as a hemispherical structure, the range of motion of the second sub-part 211 can be increased to adapt to the intensity and frequency of earthquakes. Furthermore, the friction of the second sub-part 211 when it moves within the slide 11 can be effectively reduced, thereby increasing the service life of both the second sub-part 211 and the slide 11.

[0054] In some embodiments of the present invention, such as Figure 1 As shown, the modified seismic loosening bolt solution for the lower frame of a hydro-generator also includes: a bearing assembly 6, with the mounting base 1 placed on the bearing assembly 6 along the extension direction perpendicular to the connection 22 (i.e., Figure 1 The mounting base 1 is movable, as shown in the X direction.

[0055] By placing the mounting base 1 on the bearing assembly 6, the bearing assembly 6 can serve as a load-bearing interface for a modified seismic anti-loosening bolt scheme suitable for the lower frame of the hydro-generator, thereby increasing the load-bearing area, improving the load-bearing effect, reducing the risk of damage, and improving the reliability of the hydro-generator unit. Furthermore, by extending along the direction perpendicular to the connection portion 22 (i.e.... Figure 1In the direction shown in the X direction, the mounting base 1 is movable, which allows the load-bearing component 6 and the mounting base 1 to be a non-rigid connection structure. When the unbalanced force generated by the earthquake causes the lower frame of the hydro-generator unit to shift, the mounting base 1 can have a slight displacement or deflection relative to the load-bearing component 6 to dissipate some of the earthquake energy and improve the adaptability of the hydro-generator unit to complex geological conditions and deformation.

[0056] In some embodiments of the present invention, such as Figure 1 As shown, the support assembly 6 includes: a support box 61 and a support member 62. The support member 62 is rotatably placed inside the support box 61, and the mounting base 1 is placed on the support member 62 such that the mounting base 1 extends in a direction perpendicular to the extension direction of the connecting portion 22 (i.e., Figure 1 The direction shown (X direction) is movable.

[0057] Since the mounting base 1 is placed on the bearing member 62, and the bearing member 62 is rotatably placed inside the bearing box 61, when the unbalanced force generated by the earthquake causes the lower frame of the hydro-generator unit to shift, the bearing member 62 can rotate so that the mounting base 1 moves in a direction perpendicular to the extension direction of the connection part 22, thereby dissipating a portion of the earthquake energy and improving the adaptability of the hydro-generator unit to complex geological conditions and deformation.

[0058] In some embodiments of the present invention, the support member 62 is configured as a sliding ball.

[0059] As some embodiments of this application, the sliding ball is rotatably placed inside the carrier box 61, and the mounting base 1 is placed on the sliding ball.

[0060] By constructing the bearing member 62 as a sliding ball, the friction between the bearing member 62 and the bearing box 61 and the mounting base 1 can be reduced, allowing the mounting base 1 to move smoothly, improving the ability to dissipate seismic energy, and thus enhancing the adaptability of the hydro-generator unit to complex geological conditions and deformation.

[0061] In some embodiments of the present invention, the bottom wall of the carrier box 61 is formed with grooves, the number of grooves corresponding to and adapted to the sliding balls, and a portion of the structure of the sliding balls is accommodated in the corresponding grooves and is rotatable relative to the grooves. And / or, the bottom wall of the carrier box 61 is made of metal.

[0062] The bottom wall of the carrier box 61 has grooves, the number of which corresponds to and is adapted to the sliding balls. Part of the structure of the sliding balls is housed in the corresponding grooves and can rotate relative to the grooves. Alternatively, the bottom wall of the carrier box 61 is made of metal.

[0063] The bottom wall of the carrier box 61 has grooves, the number of which corresponds to and is adapted to the sliding balls. Part of the sliding ball is housed in the corresponding groove and can rotate relative to the groove. As some embodiments of this application, there are multiple sliding balls and multiple grooves that correspond to the sliding balls. The inner surface of the groove can be constructed as an arc surface and adapted to the sliding ball. Parts of the multiple sliding balls are housed in the corresponding grooves, and the multiple sliding balls can rotate relative to the corresponding grooves.

[0064] This design can fix the position of the sliding ball, allowing it to rotate in an orderly manner. It also facilitates positioning during the installation of the sliding ball, improving assembly efficiency. Furthermore, it ensures that the movement of the mounting base 1 is smooth and stable.

[0065] The bottom wall of the bearing box 61 is made of metal. As some embodiments of this application, the bottom wall of the bearing box 61 can be made of high-strength alloy steel. High-strength alloy steel has the characteristics of corrosion resistance and wear resistance, which can improve the service life of the bearing box 61. At the same time, high-strength alloy steel has the characteristic of high temperature strength. When the sliding ball rotates relative to the groove, the temperature of the bottom wall of the bearing box 61 may rise due to sliding friction. High-strength alloy steel can still maintain high strength and hardness in high temperature environment and is not easy to deform, further improving the service life of the bearing box 61.

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0067] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0068] In the description of this invention, "a plurality of" means two or more.

[0069] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0070] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A modified design for earthquake-resistant loosening bolts on the lower frame of a hydro-generator, characterized in that, include: Mounting base, the mounting base defining a sliding groove, the inner surface of the sliding groove being constructed as an arc surface; The mounting component includes: a head and a connecting part, one end of the connecting part is connected to the head and the connecting part is adapted to be connected to the frame of the hydro-generator unit, and at least a portion of the head is adapted to the inner surface of the slide groove and is movably disposed in the slide groove. A mounting shell and an elastic element are provided, the mounting shell defining a receiving space, the connecting portion passing through the receiving space, at least a portion of the elastic element being received within the receiving space, and at least a portion of the elastic element being located between the connecting portion and the wall of the receiving space.

2. The modified earthquake-resistant loosening bolt solution for the lower frame of a hydro-generator according to claim 1, characterized in that, The elastic element is constructed as a spherical spring, and the connecting part passes through the spherical spring.

3. The modified earthquake-resistant loosening bolt solution for the lower frame of a hydro-generator according to claim 2, characterized in that, Also includes: A connector is provided, through which the spherical spring is connected to the mounting housing.

4. The modified earthquake-resistant loosening bolt solution for the lower frame of a hydro-generator according to claim 1, characterized in that, The elastic element comprises multiple helical springs, which are arranged around the connecting portion. The two ends of the elastic element are respectively connected to the connecting portion and the wall of the receiving space.

5. The modified earthquake-resistant loosening bolt solution for the lower frame of a hydro-generator according to claim 1, characterized in that, The head includes a first sub-part and a second sub-part. One end of the connecting part is connected to the first sub-part. The connecting part and the first sub-part together form a bolt. The second sub-part is sleeved on the first sub-part. At least a portion of the second sub-part is adapted to the inner surface of the slide groove and is movably disposed within the slide groove.

6. The modified earthquake-resistant loosening bolt solution for the lower frame of a hydro-generator according to claim 5, characterized in that, The groove is a hemispherical groove, and the second sub-section is a hemispherical structure.

7. The modified earthquake-resistant loosening bolt solution for the lower frame of a hydro-generator according to claim 1, characterized in that, Also includes: A support assembly, wherein the mounting base is placed on the support assembly and is movable along the extension direction perpendicular to the connection portion.

8. The modified earthquake-resistant loosening bolt solution for the lower frame of a hydro-generator according to claim 7, characterized in that, The support assembly includes: a support box and a support member, the support member being rotatably placed inside the support box, and the mounting base being placed on the support member so that the mounting base is movable in a direction perpendicular to the extension direction of the connection portion.

9. The modified earthquake-resistant loosening bolt solution for the lower frame of a hydro-generator according to claim 8, characterized in that, The support component is constructed as a sliding ball.

10. The modified earthquake-resistant loosening bolt solution for the lower frame of a hydro-generator according to claim 9, characterized in that, The bottom wall of the carrier box has grooves, the number of which corresponds to and is adapted to the number of sliding balls, and a portion of the structure of the sliding ball is housed in the corresponding groove and is rotatable relative to the groove; And / or, the bottom wall of the carrier box is made of metal.

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