Long-term storage device for generator rotor

Abstract

A generator rotor long-term storage device provided by the utility model comprises a base plate, a support unit arranged on the base plate and at least one displacement sensor arranged on the base plate and used for detecting deflection deformation of a rotor, and the support unit comprises a first support member, a second support member and a third support member. The first supporting piece, the second supporting piece and the third supporting piece are arranged on the bottom plate corresponding to the two ends of the rotor body and the steam end extending end respectively so as to support the two ends of the rotor body and the steam end extending end. According to the storage device, the rigidity and the mass of each section of the rotor are considered, the first supporting piece, the second supporting piece and the third supporting piece are arranged, then the two ends of the rotor body and the steam end extending end are supported, it is ensured that the whole storage device has enough bearing capacity and stability, and deflection deformation is made to be minimum as much as possible. By arranging the displacement sensor, the deflection deformation condition of the rotor can be monitored in real time, and the quality and performance of the rotor are ensured.

Description

Technical Field

[0001] This utility model relates to the field of rotor storage technology, specifically to a long-term storage device for generator rotors. Background Technology

[0002] The generator rotor is a crucial component of the generator, and its quality and performance directly affect the generator's operating efficiency and stability. A nuclear power plant is procuring a spare generator rotor to handle emergencies. It needs to be stored in a spare parts warehouse for an extended period, but the crane in the warehouse has a load capacity less than the rotor's weight. Upon delivery, three problems will arise.

[0003] First, the rotor's own weight causes deflection and deformation, necessitating a rotor rotation every six months. Due to insufficient load-bearing capacity of the warehouse cranes, two additional lifting-type rotation devices would be required. This not only incurs significant equipment costs but also poses a significant risk of rotor axial movement during the lifting process, as the two devices cannot be perfectly synchronized. Furthermore, regular rotation requires unpacking and repackaging the rotors, incurring substantial labor and material costs. Some existing storage facilities still lack sufficient stability and reliability in their support structures to meet long-term storage requirements. Moreover, some existing systems lack effective monitoring methods, failing to detect rotor deformation in a timely manner and thus missing the optimal time for repair or replacement.

[0004] Secondly, the rotor is at risk of moisture damage during storage. Changes in the storage environment of spare parts can lead to a decrease in the rotor's insulation performance, affecting its availability.

[0005] Third, the rotor requires two mobile cranes to operate simultaneously during unloading and loading. This necessitates the use of two additional storage spaces on either side of the rotor, putting pressure on warehouse resources and increasing the risk of spare parts damage due to frequent movement of adjacent spaces. Secondly, the two mobile cranes need to coordinate closely; improper coordination can cause the rotor to tilt, threatening equipment safety. Thirdly, the lack of convenience when urgently needing spare parts hinders on-site repairs. Finally, using mobile cranes for unloading and loading is costly. Utility Model Content

[0006] In view of the problems existing in the prior art, this utility model proposes a long-term storage device for generator rotors.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: A generator rotor long-term storage device includes a base plate, a support unit disposed on the base plate, and at least one displacement sensor disposed on the base plate for detecting rotor deflection deformation. The support unit includes a first support member, a second support member, and a third support member. The first support member, the second support member, and the third support member are respectively disposed on the base plate corresponding to both ends of the rotor body and the steam end extension, so as to support both ends of the rotor body and the steam end extension.

[0008] Furthermore, preferably, at least two displacement sensors are provided, at least one displacement sensor is between the first support and the second support, and at least the other displacement sensor is between the second support and the third support.

[0009] Furthermore, the storage device preferably includes a sealing cover that seals over the base plate, the sealing cover and the base plate defining a sealed space, and the support unit and the displacement sensor are disposed within the sealed space.

[0010] Furthermore, the storage device preferably includes an air replenishment unit, and the sealing cover is provided with an air replenishment port, and the air replenishment unit is connected to the sealing space through the air replenishment port.

[0011] Furthermore, the gas replenishment unit preferably includes a gas source, a gas supply pipe connected to the output end of the gas source, a valve and a pressure gauge installed on the gas supply pipe.

[0012] Furthermore, preferably, the sealing cover has a pre-reserved wiring port for measuring the insulation resistance of the rotor winding.

[0013] The storage device further includes at least three support loading and unloading units, which are respectively arranged corresponding to the positions of the first support, the second support, and the third support. All the support loading and unloading units are used together to support the base plate and the rotor supported on the base plate.

[0014] Furthermore, each of the support loading and unloading units preferably includes a support beam and at least two support piers respectively supported below the two ends of the support beam, and the top surfaces of all the support beams together form the support surface of the base plate.

[0015] Furthermore, the optimal selection of the cross-sectional area of ​​the supporting beam should ensure that the normal stress of the transverse supporting beam is less than 205 MPa, the shear stress is less than 120 MPa, and the overall stability is less than 95ε. k 2 Web stability less than 80ε k The stability of the portion of the box-shaped cross-section other than the web is less than 15ε. kThe stability of the middle section between the two webs of the box-shaped cross-section is less than 40ε. k The deflection of the transverse support beam is less than 2mm.

[0016] Furthermore, the height of the preferred support pier must be higher than the driving height of the vehicle platform, with a height of 900-980mm and a width of 950-1050mm; the vertical compressive stress of the support pier should be less than 205MPa, and the ground pressure of the support pier should be less than 30t / ㎡.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. Stable structure and high reliability: Considering the stiffness and mass of each section of the rotor, a first support, a second support, and a third support are set up to support both ends of the rotor body and the steam end extension, ensuring that the entire storage device has sufficient load-bearing capacity and stability, so that the rotor deflection deformation is minimized during long-term storage.

[0019] 2. Effective monitoring of deflection deformation: By setting up displacement sensors, the deflection deformation of the rotor can be monitored in real time, deformation problems can be detected and dealt with in a timely manner, and the quality and performance of the rotor can be ensured.

[0020] 3. Saves on maintenance costs and packaging replacement costs for periodic turning of generator rotors during long-term storage, while also reducing equipment safety risks associated with the periodic use of liftable turning carts for generator rotors. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of one embodiment of the generator rotor long-term storage device of this utility model;

[0023] Figure 2 This is a schematic diagram of another embodiment of the generator rotor long-term storage device of this utility model;

[0024] Figure 3 yes Figure 2 Top view. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] This utility model provides a device for long-term storage of generator rotors, such as... Figures 1-3 As shown, it includes a base plate 10, a support unit 20 disposed on the base plate 10, and at least one displacement sensor 30 disposed on the base plate 10 for detecting the deflection deformation of the rotor 100.

[0031] The rotor 100 is analyzed using modeling methods, considering the stiffness and mass of each segment of the rotor 100, and additional support positions are added, with the goal of minimizing the deflection of the rotor 100. The final support scheme is obtained. Simulation calculations show that the rotor 100 deflection is minimized when supported at both ends of the rotor body and the steam end extension. This is because, in this invention, the support unit 20 includes a first support member 21, a second support member 22, and a third support member 23. These three members are respectively positioned on the base plate 10 at both ends of the rotor 100 body and the steam end extension, providing support to these areas. This design ensures stable support for the rotor 100 during storage, preventing deformation.

[0032] Specifically, the first support member 21, the second support member 22 and the third support member 23 all include a base, the top surface of which is an arc-shaped structure, and are respectively supported at both ends of the rotor 100 body and below the steam end extension.

[0033] In one specific embodiment, at least two displacement sensors 30 are provided. At least one displacement sensor 30 is located between the first support member 21 and the second support member 22 to monitor the deflection deformation at one end of the rotor 100 body. At least one other displacement sensor 30 is located between the second support member 22 and the third support member 23 to monitor the deflection deformation at the other end of the rotor 100 body and the deflection deformation at the steam end extension. Through the monitoring of these two displacement sensors 30, the deflection deformation of the rotor 100 can be comprehensively understood, and deformation problems can be detected and addressed in a timely manner.

[0034] In a preferred embodiment, the storage device includes a sealing cover 40 that seals over the base plate 10, the sealing cover 40 and the base plate 10 defining a sealed space 41, and the support unit 20 and the displacement sensor 30 are disposed within the sealed space 41. The sealing cover 40 effectively prevents the external environment from affecting the rotor 100, protecting it from dust, moisture, and other adverse factors. Simultaneously, airflow within the sealed space 41 is also restricted, reducing the corrosive effect of air on the rotor 100. In one specific embodiment, the wall thickness of the sealing cover 40 is 5 mm.

[0035] In a preferred embodiment, the storage device includes a gas replenishment unit 50, and the sealing outer cover 40 is provided with a gas replenishment port. The gas replenishment unit 50 is connected to the sealed space 41 through the gas replenishment port. The gas replenishment unit 50 can replenish the sealed space 41 with compressed air or inert gas such as nitrogen to prevent the rotor 100 from getting damp or corroded. The gas for replenishment has two sources: one is automatic replenishment through compressed air or nitrogen from the plant, and the other is supply through a gas cylinder to prevent the plant from being unable to supply gas when needed.

[0036] In a preferred embodiment, the gas replenishment unit 50 includes a gas source, a gas supply pipe connected to the output end of the gas source, a valve installed on the gas supply pipe, and a pressure gauge. Simultaneously, by adjusting the opening degree of the valve, the flow rate of gas in the gas supply pipe can be controlled, thereby regulating the pressure and humidity within the sealed space 41. The pressure gauge allows for real-time monitoring of the pressure within the sealed space 41, ensuring the pressure remains within a suitable range. The gas replenishment unit 50 operates by controlling the opening and closing of the solenoid valve using a pressure gauge, thereby ensuring the pressure inside the sealed space 41 is between 0.3 and 2.5 kPa. Excessive or insufficient pressure will trigger a corresponding alarm light. Temperature sensors, humidity sensors, etc., may also be included, and all three sensors—pressure gauge, temperature sensor, and humidity sensor—have digital displays for easy observation of the state within the sealed space 41.

[0037] In a preferred embodiment, the sealed outer cover 40 has a pre-installed wiring port 60 for measuring the insulation resistance of the rotor 100. The wiring port 60 facilitates insulation resistance measurement of the rotor 100, ensuring that the electrical performance of the rotor 100 meets requirements. When performing insulation resistance measurement, simply connect the measuring instrument to the rotor 100 through the wiring port 60.

[0038] In a preferred embodiment, the storage device further includes at least three support loading and unloading units 70. These three units are respectively positioned corresponding to the first support member 21, the second support member 22, and the third support member 23. All support loading and unloading units 70 collectively support the base plate 10 and the rotor 100 supported on the base plate 10, allowing for rapid loading and unloading of goods using an automatic lifting trolley. The support loading and unloading units 70 facilitate the movement and fixation of the entire storage device, improving its flexibility and practicality.

[0039] Furthermore, preferably each of the supporting loading and unloading units 70 includes a supporting beam 71 and at least two supporting piers 72 respectively supported below both ends of the supporting beam 71. The top surfaces of all the supporting beams together form the supporting surface of the base plate 10. The structural design of the supporting beams 71 and the supporting piers 72 can ensure the stability and load-bearing capacity of the base plate 10, preventing deformation or damage due to insufficient load-bearing capacity. The length of the supporting beam 71 is determined by the safe distance between the vehicle platform and the supporting piers, the width of the vehicle platform, and the width of the supporting piers 72, such as 6000 mm.

[0040] In a preferred embodiment, the cross-sectional area of ​​the supporting beam 71 is selected such that the normal stress of the transverse supporting beam is less than 205 MPa, the shear stress is less than 120 MPa, and the overall stability is less than 95ε. k 2 Web stability less than 80ε k The stability of the portion of the box-shaped cross-section other than the web is less than 15ε. k The stability of the middle section between the two webs of the box-shaped cross-section is less than 40ε. k The deflection deformation of the transverse support beam is less than 2mm, ensuring that the normal stress, shear force, and stability of the support beam meet the design requirements of GB 20017 "Standard for Design of Steel Structures". The selection of these parameters ensures that the strength and stability of the support beam 71 meet the requirements, providing reliable support for the long-term storage of the rotor 100.

[0041] In a preferred embodiment, the height of the support pier 72 must be higher than the driving height of the vehicle platform, with a height of 900-980mm, and the width of the support pier 72 is 950-1050mm; if 950mm is chosen, the width of the support pier 72 is 1000mm. This dimensional design ensures that the support pier 72 has sufficient load-bearing capacity and stability, while facilitating the movement and fixing of the entire storage device. The vertical compressive stress of the support pier 72 is less than 205MPa, and the ground pressure of the support pier 72 should be less than 30t / ㎡. This ensures that the compressive stress of the support pier meets the design requirements of GB 50017 "Steel Structure Design Standard", and the ground pressure meets the ground safety load requirements.

[0042] To ensure stability and reduce deflection of the support beam 71, an additional support pier 72 can be added between the two support piers 72. This middle support pier 72 serves a reinforcing function. The design dimensions of the support pier 72 can be the same as or different from the other support piers. It is pushed in after unloading or pushed out before loading, and its technical parameters must meet the requirements of GB 50017. The positions of the support beam 71 and the support pier 72 are consistent with the support positions of the rotor 100.

[0043] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0044] 1. Stable structure and high reliability: By rationally designing the structure of the support unit and the support loading and unloading unit, the entire storage device is ensured to have sufficient load-bearing capacity and stability, preventing the rotor from deforming during long-term storage and facilitating loading and unloading.

[0045] 2. Effective monitoring of deflection deformation: By setting up displacement sensors, the deflection deformation of the rotor can be monitored in real time, deformation problems can be detected and dealt with in a timely manner, and the quality and performance of the rotor can be ensured.

[0046] 3. Protect the rotor from external environmental influences: The sealed outer cover effectively prevents the rotor from being affected by the external environment and protects it from adverse factors such as dust and moisture.

[0047] 4. Provide a suitable storage environment: The air supply unit can keep the sealed space dry to prevent the rotor from getting damp and corroded.

[0048] 5. Improve the flexibility and practicality of the storage device: The installation of the support loading and unloading unit makes it easy to move and fix the entire storage device, thus improving its flexibility and practicality.

[0049] 6. Enables rapid loading and unloading without the need for a crane, saving lifting costs and reducing the risk of rotor tilting during lifting. It also allows for rapid loading during emergency repairs, saving time.

[0050] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A long-term storage device for a generator rotor, characterized by The storage device comprises a bottom plate, a supporting unit arranged on the bottom plate, and at least one displacement sensor arranged on the bottom plate for detecting deflection deformation of the rotor, the supporting unit comprises a first supporting member, a second supporting member and a third supporting member, the first supporting member, the second supporting member and the third supporting member are arranged on the bottom plate corresponding to the two ends of the rotor body and the steam end overhanging end to support the two ends of the rotor body and the steam end overhanging end.

2. The generator rotor long-term storage device of claim 1, wherein, At least two displacement sensors are arranged, at least one of the displacement sensors is arranged between the first supporting member and the second supporting member, and at least one of the displacement sensors is arranged between the second supporting member and the third supporting member.

3. The generator rotor long-term storage device of claim 1, wherein, The storage device comprises a sealing cover arranged on the bottom plate, the sealing cover and the bottom plate define a sealed space, the supporting unit and the displacement sensor are arranged in the sealed space.

4. The generator rotor long-term storage device of claim 3, wherein, The storage device comprises a gas supplementing unit, a gas supplementing port is arranged on the sealing cover, and the gas supplementing unit communicates with the sealed space through the gas supplementing port.

5. The generator rotor long-term storage device of claim 4, wherein, The gas supplementing unit comprises a gas source, a gas conveying pipe connected to the output end of the gas source, a valve arranged on the gas conveying pipe, and a pressure gauge.

6. The generator rotor long-term storage device of claim 3, wherein, A wiring port is reserved on the sealing cover for measuring the insulation resistance of the rotor winding.

7. The generator rotor long-term storage device of claim 1, wherein, The storage device further comprises at least three supporting and dismounting units, at least three supporting and dismounting units are arranged corresponding to the positions of the first supporting member, the second supporting member and the third supporting member, and all the supporting and dismounting units are used to support the bottom plate and the rotor arranged on the bottom plate.

8. The generator rotor long-term storage device of claim 7, wherein, Each supporting and dismounting unit comprises a supporting beam and at least two supporting piers arranged below the two ends of the supporting beam, and the top surfaces of all the supporting beams form a supporting surface of the bottom plate.

9. The generator rotor long-term storage device of claim 8, wherein, The cross-sectional area of the support beam is selected so that the normal stress of the transverse support beam is less than 205 MPa, the shear stress is less than 120 MPa, the overall stability is less than 95ε k 2 , the web stability is less than 80ε k , the stability of the part other than the web of the box section is less than 15ε k , the stability of the middle part of the two webs of the box section is less than 40ε k , and the deflection deformation of the transverse support beam is less than 2 mm.

10. The generator rotor long-term storage device of claim 8, wherein, The height of the supporting pier must be higher than the driving height of the vehicle plate, the height is 900-980mm, the width of the supporting pier is 950-1050mm, the vertical plate stress of the supporting pier is less than 205MPa, and the ground pressure of the supporting pier should be less than 30t / ㎡.

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