Supporting system for large-flow and high-rotating-speed main water feeding pump set

Abstract

The invention discloses a supporting system for a large-flow and high-rotating-speed main water feeding pump set, and relates to the technical field of water pump accessories, the supporting system comprises a bottom plate and a support fixedly arranged on the bottom plate, an upper inner cavity, a lower inner cavity and a supporting leg inner cavity which are used for grouting are symmetrically formed in the support, and a second through hole communicated with the lower inner cavity is formed in the upper inner cavity; a first through hole communicated with the supporting leg inner cavity is formed in the lower inner cavity, and at least one grouting hole communicated with the upper inner cavity and at least one exhaust hole communicated with the upper inner cavity and the support are formed in the support. And the grouting hole, the exhaust hole, and the upper inner cavity, the lower inner cavity and the supporting leg inner cavity which are communicated with one another jointly form a grouting channel capable of filling all the cavities with grouting materials after the grouting materials are injected. High-compactness filling and interface bonding of the grouting material and the base structure are achieved, the rigidity and integrity of the base are remarkably enhanced through the structure, and the problem that vibration of the main water feeding pump exceeds the standard due to insufficient rigidity of the base is effectively solved.

Description

Technical Field

[0001] This application relates to the field of water pump accessories technology, and in particular to a support system for a main feed water pump set with large flow rate and high speed. Background Technology

[0002] As a key piece of equipment in industrial systems such as thermal power generation, nuclear power plants, and chemical plants, the main feedwater pump's operational stability directly affects the safety and efficiency of the entire system. In actual operation, the main feedwater pump often causes excessive vibration due to insufficient rigidity of the base structure. In severe cases, this can lead to equipment damage, seal failure, increased noise, and even affect the stable operation of the entire system.

[0003] In the existing technology, the main water pump base is mostly made of channel steel structure, and secondary grouting is only carried out around the anchor bolt holes. The grouting layer is thin and discontinuous. The overall rigidity of this type of base is low, and it is difficult to effectively suppress the vibration transmission caused by the high-speed operation of the pump set. The vibration problem is more prominent, especially in pump sets with large flow, high speed and high power. Summary of the Invention

[0004] In order to improve the vibration problem generated during the operation of the pump set, this application provides a support system for a main feed water pump set with large flow rate and high speed.

[0005] The technical solution provided in this application for a support system for a main feedwater pump set with large flow rate and high speed is as follows: A support system for a high-flow-rate, high-speed main feedwater pump unit includes a base plate and a bracket fixedly mounted on the base plate. The bracket has an upper inner cavity, a lower inner cavity, and a leg inner cavity symmetrically arranged for grouting. The upper inner cavity has a second through hole connecting to the lower inner cavity, and the lower inner cavity has a first through hole connecting to the leg inner cavity. The bracket has at least one grouting hole communicating with the upper inner cavity and at least one vent hole communicating with the upper inner cavity and the bracket. The grouting hole, the vent hole, and the interconnected upper inner cavity, lower inner cavity, and leg inner cavity together form a grouting channel that allows the grouting material to fill all the cavities after injection.

[0006] By adopting the above technical solution, the base plate, the support, and the interconnected upper inner cavity, lower inner cavity, and leg inner cavity together form a complete grouting cavity network. Combined with the grouting holes and venting holes, a closed grouting channel is formed that allows the grouting material to self-level and fill all internal spaces. The high density filling and interface bonding of the grouting material and the base structure enhance the rigidity and integrity of the base, effectively suppressing the problem of excessive vibration of the main water supply pump caused by insufficient base rigidity.

[0007] Preferably, the support has symmetrically arranged, interconnected collection basins.

[0008] By adopting the above technical solution, symmetrically arranged and interconnected collection basins are used to collect and divert liquids that may leak from the pump unit seals, preventing them from corroding the base foundation or polluting the environment, thereby improving the operational safety and maintenance convenience of the equipment.

[0009] Preferably, the bracket is provided with at least one support plate for supporting the water pump pipeline.

[0010] By adopting the above technical solution, the support plate installed on the bracket provides stable and reliable auxiliary support for the inlet and outlet pipelines of the water pump, which can effectively share the weight of the pipeline and suppress its vibration transmission to the pump body, thereby improving the operational stability of the entire pump pipeline system.

[0011] Preferably, it also includes a main shaft that penetrates the support and the lower inner cavity, and a number of guide vanes are provided on the section of the main shaft near the second through hole, and a limit groove is provided on the main shaft.

[0012] By adopting the above technical solution, the main shaft that runs through the support and is located in the lower inner cavity, along with the guide vanes on it, constitute a mechanical stirring and guiding mechanism. This mechanism can actively stir and guide the flow of grout during grouting, preventing the grout from depositing and clogging near the grouting hole, and promoting its filling into the far-end cavity.

[0013] Preferably, the guide vanes are arranged circumferentially along the main shaft to guide the grout material to the edge of the cavity during rotation.

[0014] By adopting the above technical solution, the guide vanes arranged circumferentially along the main shaft can generate a radial force pointing towards the edge of the cavity when rotating, thereby actively pushing the grout to the periphery and corners of the cavity, effectively solving the problem of incomplete edge filling caused by the decrease in grout fluidity.

[0015] Preferably, it further includes a vibratory assembly mounted on the main shaft. The vibratory assembly includes a placement frame mounted on the base plate. A housing is fixedly mounted on the placement frame. A circular groove is opened through the housing. Control blocks arranged in a circular array and forming inner and outer rings are fixedly mounted in the circular groove. A rotating plate is rotatably mounted through the housing. The rotating plate cooperates with the control blocks through a striking structure to achieve orderly vibration.

[0016] By adopting the above technical solution, the vibration assembly, consisting of a placement frame, outer shell, rotating plate and control block, is linked with the main shaft to convert the rotational motion of the main shaft into the periodic radial motion of the striking structure on the rotating plate, thereby realizing automatic and orderly mechanical vibration of the base shell during the grouting process.

[0017] Preferably, the striking structure includes a straight groove formed on the rotating plate, a sliding rod slidably disposed in the straight groove, a vibrating column that slides with the control block disposed in the sliding rod, and a return spring fixedly disposed between the vibrating column and the sliding rod.

[0018] By adopting the above technical solution, the striking structure, consisting of a sliding rod, a vibrating column, and a return spring, converts the rotational motion into the axial extension and retraction motion of the vibrating column through sliding cooperation with the rotating plate and contour contact with the control block, and uses the energy storage and release of the spring to achieve periodic striking.

[0019] Preferably, the control block is provided with alternating vertical inclined surfaces and inclined lifting surfaces along the circumference. When the vibrating column moves along the inclined lifting surface, the vibrating column is gradually pressed into the slide rod and the return spring is compressed. When the vibrating column passes the vertical inclined surface, the return spring drives the vibrating column to extend quickly and strike.

[0020] By adopting the above technical solution, the alternating vertical slopes and inclined lifting surfaces on the control block, in conjunction with the vibrating column, form a mechanical cam lifting and instantaneous release mechanism, which allows the vibrating column to be pressed back along the slope to store force, and then instantly ejected along the vertical surface to strike, producing a clear impact vibration.

[0021] Preferably, the tilting and lifting surfaces of the inner and outer rings of the control blocks are tilted in opposite directions, so that the vibrating column can achieve periodic tapping when the main shaft rotates in different directions.

[0022] By adopting the above technical solution, the control blocks with opposite inclination directions in the inner and outer rings allow the vibrating column to be pressed back and stored along the corresponding inclined lifting surface when the main shaft rotates forward or backward, and then released through the vertical inclined surface to achieve the knocking action. This allows the main shaft to rotate in both directions and work normally, improving the operational tolerance and flexibility.

[0023] Preferably, the main shaft is provided with a handwheel that slides within a limiting groove.

[0024] By adopting the above technical solution, the handwheel installed on the main shaft and sliding in the limiting groove provides a drive interface that is easy to operate and apply force manually, so that the main shaft can be easily driven to rotate manually to perform stirring, guiding and vibrating functions without the need for electricity.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By replacing the traditional channel steel structure with a multi-cavity interconnected welded steel plate structure, the upper inner cavity, lower inner cavity, support leg inner cavity, grouting hole, first through hole, and second through hole form a continuous and interconnected grouting cavity. This allows the secondary grouting layer to fully expand into the upper inner cavity, lower inner cavity, and the four support leg inner cavities, achieving high-density filling and interface bonding between the grouting material and the base structure. This structure significantly enhances the rigidity and integrity of the base, effectively suppressing the problem of excessive vibration of the main feedwater pump caused by insufficient base rigidity, improving the operational stability and reliability of the pump unit under high-speed and high-flow conditions, while ensuring compatibility with the original pump interface size, facilitating on-site installation and modification.

[0026] 2. By setting a main shaft with four circumferentially arrayed inclined guide vanes in the lower inner cavity, the main shaft drives the guide vanes to rotate during grouting, forming a fan-like guiding effect. This not only effectively prevents the grouting material from depositing and clogging in the second through hole, but also uses the inclined surface of the guide vanes to guide the grouting material, promoting the grout to enter the lower inner cavity and edge area of ​​the base more evenly and quickly, avoiding grouting blind spots and improving the integrity of the filling.

[0027] 3. By integrating a detachable vibratory assembly onto the main shaft, the internal control block and vibratory column work together to achieve orderly vibration during bidirectional rotation driven by the main shaft. During clockwise rotation, the vibratory column is lifted and released by the outer control block, producing periodic impacts; during counter-clockwise rotation, the inner control block compresses and releases the vibratory column, also producing a vibration effect. This design allows for simultaneous multi-point vibration of the support during grouting, effectively removing air bubbles from the grout and enhancing the density and uniformity of the grout layer.

[0028] 4. Through the dual action of guiding and vibrating, the secondary grouting is ensured to fully fill each cavity of the base and tightly combine with the support to form a uniform and highly dense grouting body, which greatly enhances the overall rigidity and structural integrity of the base. After the base is put into use, it can significantly suppress the vibration transmission during the operation of the main water pump, avoid the problem of excessive vibration caused by insufficient base rigidity or inadequate grouting, and ensure the long-term stable operation of the pump unit. Attached Figure Description

[0029] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this application; Figure 2 This is a cross-sectional view of the grouting location in this application; Figure 3 This is a top view of the overall structure of this application; Figure 4 This is a bottom view of the overall structure of this application; Figure 5 This is a schematic diagram of the main axis position structure of this application; Figure 6 This is a schematic diagram of the position and structure of the guide vanes in this application; Figure 7 This is a schematic diagram of the internal structure of the vibratory tamping assembly of this application; Figure 8 This is a schematic diagram of the straight groove position structure in this application; Figure 9 This is a cross-sectional view of the internal structure of the vibratory tamping assembly of this application; Figure 10 This is a schematic diagram of the control block location structure in this application.

[0030] Reference numerals: 1. Base plate; 2. Support; 3. Upper inner cavity; 4. Lower inner cavity; 5. Leg inner cavity; 6. Grouting hole; 7. Vent hole; 8. Collection basin; 9. Support plate; 10. First through hole; 11. Second through hole; 12. Main shaft; 121. Limiting groove; 13. Guide vane; 14. Vibrating assembly; 141. Placement frame; 142. Outer shell; 143. Rotating plate; 144. Circular groove; 145. Control block; 1451. Vertical inclined plane; 1452. Inclined lifting surface; 146. Straight groove; 147. Slide rod; 148. Vibrating column; 149. Return spring; 15. Handwheel. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-10 This application will be described in further detail.

[0032] This application discloses a support system for a main feedwater pump set with high flow rate and high speed.

[0033] Example 1 Reference Figures 1 to 4 A support system for a main feedwater pump set with high flow rate and high speed includes a base plate 1 and a bracket 2 fixedly installed on the base plate 1. The base plate 1 has eight anchor bolt holes. The bracket 2 is symmetrically arranged above the base plate 1. The bracket 2 has an upper inner cavity 3, a lower inner cavity 4 and a support leg cavity 5 symmetrically opened inside for grouting. The upper inner cavity 3 is located at the top of the bracket 2, and the support leg cavity 5 is located inside the civil foundation. Two lower inner cavities 4 are opened on the bottom of one side of the bracket 2. A second through hole 11 is opened at the bottom of the upper inner cavity 3. The second through hole 11 is located at the top between the two lower inner cavities 4 and connects the interior of the two lower inner cavities 4. A first through hole 10 is opened at the bottom of the lower inner cavity 4 and connects to the support leg cavity 5. The first through hole 10 penetrates the bottom of the base plate 1. At least one grouting hole 6 is provided on the support 2. One hole is symmetrically provided on both sides of the support 2 in the figure, and another grouting hole 6 is also provided on the top surface of the middle part of the support 2. The grouting hole 6 is connected to the interior of the upper inner cavity 3. At least one vent hole 7 is provided on the support 2. The vent hole 7 is connected to the upper inner cavity 3 and the interior of the support 2. The grouting hole 6, the vent hole 7, and the interconnected upper inner cavity 3, lower inner cavity 4, and support leg inner cavity 5 together form a grouting channel that can fill all cavities after the grouting material is injected. Two collection basins 8 are symmetrically provided on the support 2. The two collection basins 8 are connected to each other through a connecting pipe. At least one support plate 9 is provided on the support 2. Four support plates are installed in the figure. The support plates 9 are used to support the water pump pipeline.

[0034] During installation, the base plate 1 and the bracket 2 are first positioned on the foundation. Then, grouting is performed in the eight anchor bolt holes pre-drilled on the civil foundation and in the area between the base plate 1 and the civil foundation. During the second grouting, the grout is pumped in through the grouting hole 6 on the bracket 2. It first enters the upper inner cavity 3, then flows through the second through hole 11 to the lower inner cavity 4, and then through the first through hole 10 to the inner cavities 5 of each support leg. During this process, the air in the cavity is discharged through the exhaust hole 7, ensuring that the grout can fill the interconnected cavities and form a highly rigid whole. The symmetrically connected collection basin 8 is used to collect any oil or water leaks that may occur during operation, keeping the environment clean. The support plate 9 provides additional stable support points for the pipeline connected to the water pump, reducing the impact of pipeline vibration on the pump body.

[0035] The implementation principle of a support system for a main feedwater pump set with high flow rate and high speed according to an embodiment of this application is as follows: During installation, the base plate 1 and the bracket 2 are first positioned as a whole, and the first grouting is completed through the anchor bolt holes. During the second grouting, the grout is pumped in from the grouting hole 6 and fills the inner cavity 5 of each support leg in sequence through the upper inner cavity 3, the second through hole 11, the lower inner cavity 4 and the first through hole 10. At the same time, air is discharged from the exhaust hole 7, forming a high-rigidity whole. The collection basin 8 is used to collect leaked oil and water, and the support plate 9 provides auxiliary support for the pipeline to reduce vibration transmission.

[0036] Example 2 Reference Figure 5 , Figure 6It also includes two main shafts 12 that penetrate the bracket 2 and the lower inner cavity 4. The two main shafts 12 are symmetrically arranged at one end of the bracket 2. The main shafts 12 are welded and installed together with the base plate 1 and the bracket 2. The main shafts 12 and the bracket 2 are rotatably connected. Several guide vanes 13 are fixedly connected to the section of the main shaft 12 near the second through hole 11. Four are installed in the figure. A limit groove 121 is opened at the end of the main shaft 12 outside the bracket 2. The four guide vanes 13 are arranged obliquely along the circumference of the main shaft 12 to guide the grout to the edge of the cavity when rotating. A handwheel 15 is detachably installed at the end of the main shaft 12 outside the bracket 2. The handwheel 15 can be installed by bolts. When the handwheel 15 is installed, it can slide in the limit groove 121. After the handwheel 15 is installed, it cannot slide in the limit groove 121.

[0037] The operator turns handwheel 15, which drives the main shaft 12 to rotate. As the main shaft 12 rotates, the guide vanes 13 located near the second through hole 11 also rotate. Because the guide vanes 13 are angled, their rotation generates a directional stirring and propulsive force below the grouting hole 6. This effectively prevents grout from accumulating and clogging at the inlet and actively guides the newly injected grout to flow towards the edge and distal area of ​​the lower inner cavity 4, away from the grouting hole 6. This significantly improves the uniformity and efficiency of grout filling in complex cavities. The main shaft 12 and guide vanes 13, located inside the base, are made of ordinary carbon steel (such as Q235 or 45# steel). Fine grinding of the surface is unnecessary; it is even recommended to retain the oxide scale or increase the roughness through sandblasting to facilitate bonding with the cement-based grout. After the grout has cured, the shaft effectively transforms into a horizontal reinforcing rib inside the base, further enhancing the overall rigidity of the base.

[0038] Reference Figures 7 to 10 It also includes a vibrating assembly 14 mounted on the main shaft 12. The vibrating assembly 14 is detachable and installable. The vibrating assembly 14 includes a placement frame 141 placed on the base plate 1. A housing 142 is bolted to the placement frame 141. In use, the side of the housing 142 away from the handwheel 15 is in contact with the outer side of the bracket 2. A circular groove 144 is formed through the side of the housing 142 near the bracket 2. Several control blocks 145 are fixedly connected in the circular groove 144. The control blocks 145 are arranged in a circumferential array and form inner and outer rings. A rotating plate 143 is rotatably connected through the housing 142. The rotating plate 143 achieves orderly vibration through the cooperation of the striking structure and the control block 145. The striking structure includes nine straight grooves 146 on the rotating plate 143. The nine straight grooves 146 are arranged in a circular array corresponding to the positions of the control block 145. A sliding rod 147 is slidably connected in each straight groove 146. The size of the sliding rod 147 is adapted to the size of the straight groove 146. A vibrating column 148 is slidably connected in each sliding rod 147. The end of the vibrating column 148 near the support 2 slides against the surface of the control block 145. A return spring 149 is fixedly connected between the vibrating column 148 and the sliding rod 147.

[0039] The vibratory assembly 14 is installed on the main shaft 12 corresponding to the grouting position before grouting. The main shaft 12 passes through the center of the vibratory assembly 14, and the rotating plate 143 slides inside the limiting groove 121. The vibratory assembly 14 is fixed to the base plate 1 by its placement frame 141. The rotating plate 143 inside is connected to the main shaft 12, so that the vibration action is synchronized with the rotation of the main shaft 12. When the main shaft 12 is driven to rotate by the handwheel 15, it will simultaneously drive the rotating plate 143 to rotate inside the outer casing 142. The vibratory column 1 is installed on the rotating plate 143 through the straight groove 146 and the slide rod 147. 48. As the rotating plate 143 rotates, the end of the vibrating column 148 will come into contact with and move relative to the control block 145 fixed in the annular groove 144. The entire device will convert the rotational motion of the main shaft 12 into the periodic radial extension and retraction motion of the vibrating column 148, laying the foundation for generating impact vibration. Through the cooperation of the guide vane 13 and the vibrating assembly 14, grouting in one of the grouting holes 6 of the support 2 can fill the lower inner cavity 4. When grout overflows from the second through hole 11 at the other end, the operation can be stopped, making the construction operation extremely simple.

[0040] Reference Figure 10 The control block 145 is provided with a vertical inclined surface 1451 and an inclined lifting surface 1452. The vertical inclined surface 1451 and the inclined lifting surface 1452 of the control block 145 are arranged alternately along the circumferential direction of the main shaft 12. When the vibrating column 148 moves along the inclined lifting surface 1452, the vibrating column 148 is gradually pressed into the slide rod 147 and the return spring 149 is compressed. When the vibrating column 148 passes the vertical inclined surface 1451, the return spring 149 drives the vibrating column 148 to quickly extend and strike. The inclined lifting surfaces 1452 of the inner and outer rings of the control block 145 have opposite inclination directions, so that the vibrating column 148 can achieve periodic striking when the main shaft 12 rotates in different directions.

[0041] When the main shaft 12 drives the rotating plate 143 to rotate in a certain direction (e.g., clockwise), the vibrating column 148 first contacts the inclined lifting surface 1452 of the outer ring control block 145. Moving along this inclined surface, the vibrating column 148 is gradually pressed back into the slide rod 147, compressing the return spring 149 to store energy. When the vibrating column 148 moves to the end of the inclined surface and passes through the vertical inclined surface 1451, the constraint disappears, and the compressed return spring 149 releases energy instantaneously, driving the vibrating column 148 to pop out at high speed and strike the outer wall of the support 2, generating a clear vibration force. After the strike is completed, the vibrating column 148... The subsequent control block 145 remains extended on the plane until the next cycle begins. If the main shaft 12 rotates in the opposite direction (counterclockwise), the vibrating column 148 will interact with the inner control block 145 through the inclined lifting surface 1452 of the outer control block 145. Since the inclined lifting surface 1452 is in the opposite direction, the cycle of compression, release, and tapping can also be achieved. This bidirectional design ensures that a continuous and orderly mechanical vibration effect can be obtained regardless of the operating direction, effectively eliminating air bubbles in the grout and improving the filling density. When rotating in the opposite direction, the guiding direction of the guide vane 13 can be changed.

[0042] The implementation principle of a support system for a high-flow, high-speed main feedwater pump group according to an embodiment of this application is as follows: The operator turns the handwheel 15 to drive the main shaft 12 to rotate, which drives the inclined guide vanes 13 to generate directional flow, preventing the grouting port from being blocked and guiding the grout to fill the far end of the lower inner cavity 4. At the same time, the main shaft 12 drives the rotating plate 143 of the vibrating assembly 14 to rotate, so that the vibrating column 148 is pressed back and stored along the inclined surface of the control block 145, and when it passes the vertical surface, it is driven by the return spring 149 to quickly pop out, periodically knocking the cavity wall to vent air and compact it. Continuous vibration can be achieved by rotating in both directions. During grouting, only one grouting hole 6 needs to be injected. When the second through hole 11 on the opposite side overflows, it indicates that the cavity is full, which simplifies the construction and makes the quality visible and controllable. After grouting is completed, the grout will initially set within 24 hours. At this time, the operator removes the handwheel 15 for recycling, and the main shaft 12 and guide vanes 13 are permanently solidified in the hardened grout body. Because the surface of the main shaft 12 has been pre-treated with sandblasting to remove rust (surface roughness Ra12.5 or higher), it forms a strong bond with the grouting material. At this point, the original main shaft 12 is transformed into a reinforcing bar inside the base, forming a steel-concrete composite structure with the concrete, further improving the overall rigidity of the base in terms of bending and torsion resistance.

[0043] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A support system for a main feedwater pump set with high flow rate and high speed, characterized in that: The system includes a base plate (1) and a bracket (2) fixedly installed on the base plate (1). The bracket (2) is symmetrically provided with an upper inner cavity (3), a lower inner cavity (4) and a leg inner cavity (5) for grouting. The upper inner cavity (3) has a second through hole (11) that connects to the lower inner cavity (4). The lower inner cavity (4) has a first through hole (10) that connects to the leg inner cavity (5). The bracket (2) has at least one grouting hole (6) that connects to the upper inner cavity (3) and at least one vent hole (7) that connects to the upper inner cavity (3) and the bracket (2). The grouting hole (6), the vent hole (7) and the interconnected upper inner cavity (3), lower inner cavity (4) and leg inner cavity (5) together form a grouting channel that can fill all cavities after the grouting material is injected.

2. The support system for a main feedwater pump set with high flow rate and high speed according to claim 1, characterized in that: The support (2) is symmetrically provided with interconnected collection basins (8).

3. A support system for a main feedwater pump set with high flow rate and high speed according to claim 2, characterized in that: The bracket (2) is provided with at least one support plate (9) for supporting the water pump pipeline.

4. A support system for a main feedwater pump set with high flow rate and high speed according to claim 1, characterized in that: It also includes a main shaft (12) that passes through the support (2) and the lower inner cavity (4). Several guide vanes (13) are provided on the section of the main shaft (12) near the second through hole (11). A limit groove (121) is provided on the main shaft (12).

5. A support system for a main feedwater pump set with high flow rate and high speed according to claim 4, characterized in that: The guide vanes (13) are arranged circumferentially along the main shaft (12) to guide the grout material to flow to the edge of the cavity when rotating.

6. A support system for a main feedwater pump set with high flow rate and high speed according to claim 4, characterized in that: It also includes a vibratory assembly (14) mounted on the main shaft (12). The vibratory assembly (14) includes a placement frame (141) mounted on the base plate (1). A housing (142) is fixedly mounted on the placement frame (141). A circular groove (144) is opened through the housing (142). A control block (145) is fixedly mounted in the circular groove (144) in a circular array and forming two inner and outer rings. A rotating plate (143) is rotatably mounted through the housing (142). The rotating plate (143) cooperates with the control block (145) through a striking structure to achieve orderly vibration.

7. A support system for a main feedwater pump set with high flow rate and high speed according to claim 6, characterized in that: The striking structure includes a straight groove (146) opened on the rotating plate (143), a slide rod (147) is slidably arranged in the straight groove (146), a vibrating column (148) that slides with the control block (145) is arranged in the slide rod (147), and a return spring (149) is fixedly arranged between the vibrating column (148) and the slide rod (147).

8. A support system for a main feedwater pump set with high flow rate and high speed according to claim 7, characterized in that: The control block (145) is provided with alternating vertical inclined surfaces (1451) and inclined lifting surfaces (1452) along the circumferential direction. When the vibrating column (148) moves along the inclined lifting surface (1452), the vibrating column (148) is gradually pressed into the slide rod (147) and the return spring (149) is compressed. When the vibrating column (148) passes the vertical inclined surface (1451), the return spring (149) drives the vibrating column (148) to quickly extend and strike.

9. A support system for a main feedwater pump set with high flow rate and high speed according to claim 8, characterized in that: The tilting lifting surfaces (1452) of the inner and outer rings of the control blocks (145) are tilted in opposite directions, so that when the main shaft (12) rotates in different directions, the vibrating column (148) can achieve periodic tapping.

10. A support system for a main feedwater pump set with high flow rate and high speed according to claim 4, characterized in that: The main shaft (12) is provided with a handwheel (15) that slides in the limiting groove (121).

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