Dynamic balance real-time dynamic adjusting device and method for water-turbine generator set

Abstract

The invention discloses a dynamic balance real-time dynamic adjusting device and method for a water-turbine generator set. The dynamic balance real-time dynamic adjusting device for the water-turbine generator set comprises eight dynamic balance adjusting units and a far-end control unit, wherein the eight dynamic balance adjusting units are symmetrically arranged on a rotor upper ring plate and a rotor lower ring plate; the dynamic balance adjusting units are connected through pipelines, and the far-end control unit adjusts the dynamic balance of the rotor in real time by controlling the amount of insulating oil in the dynamic balance adjusting units. According to the method, the data monitored by the unit monitoring system are analyzed and synthesized in real time, and weight balancing is carried out in time according to the data, so that the defects that an existing weight balancing method is weak in adaptive capacity and troublesome in operation, and weight balancing is carried out only on a plane are effectively overcome.

Description

Technical Field

[0001] This application belongs to the field of hydro-generator technology, and in particular relates to a real-time dynamic adjustment device for the dynamic balance of a hydro-generator set. Background Technology

[0002] Hydropower generator sets are devices that convert water energy into electrical energy. The normal operation of hydropower generator sets is directly related to the safety and stability of power plants and even power grids. Among the various operating indicators, the swing and vibration of hydropower generator sets are particularly critical. The dynamic balancing test during the commissioning process is an important step to reduce the swing and vibration of hydropower generator sets.

[0003] The main steps of the current dynamic balancing test are as follows: 1. Calculate the location of the counterweight required for dynamic balancing by measuring the runout of the rotating parts during unit operation; 2. Shut down the unit and add counterweights at the appropriate locations; 3. Start the unit and check whether the vibration and runout of the rotating parts of the unit meet the requirements; 4. Repeat steps 2 and 3 until the unit's vibration and sway meet the standards.

[0004] The above is the method used in the prior art, but it has the following drawbacks: 1. Each time the counterweight needs to be rebalanced, the unit needs to be stopped and restarted, which is a complicated operation; 2. The dynamic balance counterweight is only suitable for the current operating conditions, such as the current head and load. If the dynamic balance counterweight of the unit meets the requirements, it cannot guarantee that the dynamic balance of the unit will meet the requirements under other heads or operating conditions. 3. Slight shaft displacement and center of gravity shift may occur during unit operation. At this time, the state of the unit changes. Dynamic balancing is performed during commissioning after unit installation or maintenance and cannot adapt to changes in the state of the unit.

[0005] 4. Existing dynamic balancing technology is only performed on the upper or lower surface of the rotor support, which is equivalent to only performing it in the XY plane in space. It is impossible to determine the height position of the counterweight required for dynamic balancing. After dynamic balancing, the unbalanced force of the unit cannot be completely eliminated.

[0006] Therefore, a new real-time dynamic balancing technology for hydro-generator sets is needed. Summary of the Invention

[0007] The purpose of this application is to overcome the problems of the prior art by disclosing a real-time dynamic adjustment device for the dynamic balance of a hydro-generator unit, which enables the unit to adapt to the operating conditions in real time and ensures that the dynamic balance state meets the requirements under all operating conditions.

[0008] On the one hand, the objective of this application is achieved through the following technical solution: A real-time dynamic balance adjustment device for a hydro-generator set, comprising: eight dynamic balance adjustment units symmetrically arranged on the upper and lower ring plates of the rotor, and a remote control unit. Each dynamic balancing unit is connected via pipelines, and the remote control unit adjusts the rotor dynamic balance in real time by controlling the amount of insulating oil in each dynamic balancing unit.

[0009] According to a preferred embodiment, the dynamic balancing adjustment unit includes: an insulating oil tank, a micro hydraulic pump, and pipelines; the insulating oil tank is connected to the pipelines via the micro hydraulic pump and is used to adjust the amount of insulating oil in the insulating oil tank within the corresponding dynamic balancing adjustment unit.

[0010] According to a preferred embodiment, the insulating mailboxes in each dynamic balancing unit are equidistant from the center of the ring plate.

[0011] According to a preferred embodiment, the dynamic balancing adjustment unit further includes a power supply module, the power supply module being powered via a DC excitation cable inside the rotor.

[0012] According to a preferred embodiment, the remote control unit adjusts the amount of oil in the insulating oil tank in real time through a micro hydraulic pump based on the swing and vibration data collected in real time by the unit monitoring system, thereby changing the weight and orientation of the counterweight and thus adjusting the rotor dynamic balance in real time.

[0013] According to a preferred embodiment, since the corresponding dynamic balance adjustment units on the upper and lower rotor ring plates are interconnected via pipelines, the remote control unit adjusts the corresponding micro hydraulic pumps of each dynamic balance adjustment unit to achieve the coordination of each dynamic balance adjustment unit on the upper and lower rotor ring plates, thereby realizing the adjustment of the counterweight position in the vertical direction.

[0014] According to a preferred embodiment, the remote control unit acquires the data collected by the unit monitoring system via wireless transmission.

[0015] According to a preferred embodiment, the remote control unit controls the micro hydraulic pumps in each dynamic balancing unit via wireless transmission.

[0016] On the other hand, this application also discloses: A method for real-time dynamic adjustment of the dynamic balance of a hydro-generator unit, wherein the method is based on the aforementioned real-time dynamic adjustment device for the dynamic balance of a hydro-generator unit, and the method includes: S1: Install the 8 dynamic balancing adjustment units on the upper ring plate and the lower ring plate of the rotor, respectively; S2: The remote control unit controls the amount of oil in each dynamic balance adjustment unit in a plane, so that the four dynamic balance adjustment units in a single plane generate a counterweight in a specified direction. S3: As the counterweight orientation changes, the unit's vibration and sway are monitored in real time. Based on the real-time monitoring of the unit's vibration and sway, the counterweight orientation is obtained when the vibration and sway data meet the preset values. S4: After the counterweight orientation is determined, increase or decrease the oil quantity at the corresponding orientation, including: Based on the real-time monitoring of the unit's vibration and sway, the control system synthesizes the sway in the current plane according to the current in-plane sway and phase information. Based on the synthesized data, it controls the corresponding oil pump to output oil to the direction with less vibration, thereby reducing the vibration. When the vibration and sway data are detected to meet the preset values, the optimal value of the counterweight in the corresponding direction is obtained. S5: After completing the adjustment of one plane, adjust the oil volume in the four dynamic balance adjustment units in another plane, and repeat steps S2-S5 to determine the weight and orientation of the counterweight in the other plane.

[0017] According to a preferred embodiment, the real-time dynamic adjustment method for the dynamic balance of the hydro-generator set further includes: S6: by adjusting the weight distribution of the counterweights in the two planes of the upper and lower rotor ring plates, the vibration and sway values ​​of the unit are further reduced.

[0018] The aforementioned main solution and its various further alternative solutions can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed in this application. Those skilled in the art, after understanding the solution of this application, will realize that there are many combinations based on the prior art and common general knowledge, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here.

[0019] The beneficial effects of this application are: 1. High safety: This application uses insulating oil to achieve weight distribution, so even if leakage occurs, it will not damage the rotating parts.

[0020] 2. Power is drawn from the excitation system, avoiding the problem of wiring rotating parts.

[0021] 3. The system vibration and sway data are taken from the existing unit monitoring system, and no other system needs to be installed independently.

[0022] 4. The remote control unit can adapt to all units and all operating conditions: This application can make adjustments in real time according to the current unit status. When the unit's head, active load, reactive load and other operating conditions change, the dynamic balance will also change accordingly.

[0023] 5. Able to adapt to minute changes in rotating parts: During the operation of the unit, due to stress, the rotating and stationary parts of the unit will undergo minute deformation, which will cause the center of gravity of the unit to change. This application can detect this in time and make changes according to the current state of the unit.

[0024] 6. From Fixed to Real-Time Adjustment: Traditional adjustment methods require removing and reinstalling the existing counterweight after it has been added to the rotor, which is labor-intensive and risky. This application allows for real-time adjustment based on the unit's operating conditions, simplifying operation.

[0025] 7. Transforming a plane into a three-dimensional structure: This application has four sets of dynamic balancing adjustment units in each of the upper and lower planes. Through the reasonable allocation of the four sets of dynamic balancing adjustment units in the upper and lower planes, axial dynamic balancing adjustment can be achieved. Traditional rotor dynamic balancing tests only perform counterweighting on the lower plane of the rotor, which cannot make the counterweight move axially. This application avoids the problem that existing dynamic balancing adjustment devices can only be performed in a fixed plane. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the dynamic balancing adjustment unit of this application installed on the upper ring plate / lower ring plate of the rotor. Detailed Implementation

[0027] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] Furthermore, it should be noted that unless otherwise specified in this application, the specific structures, connections, positions, power sources, etc. involved are all things that a person skilled in the art can know without creative effort based on the prior art.

[0033] Example 1 refer to Figure 1 As shown in the figure, this embodiment discloses a real-time dynamic balance adjustment device for a hydro-generator set. The real-time dynamic balance adjustment device for a hydro-generator set includes: eight dynamic balance adjustment units symmetrically arranged on the upper and lower ring plates of the rotor, and a remote control unit; each dynamic balance adjustment unit is connected by a pipeline, and the remote control unit adjusts the rotor dynamic balance in real time by controlling the amount of insulating oil in each dynamic balance adjustment unit.

[0034] Preferably, the dynamic balancing unit includes: an insulating oil tank, a miniature hydraulic pump, and pipelines; the insulating oil tank is connected to the pipelines via the miniature hydraulic pump and is used to adjust the amount of insulating oil in the insulating oil tank within the corresponding dynamic balancing unit. The insulating oil tanks in each dynamic balancing unit are equidistant from the center of the ring plate.

[0035] Preferably, the dynamic balancing adjustment unit further includes a power supply module, the power supply module being powered via a DC excitation cable inside the rotor. This avoids the difficulty of arranging a wired power supply and allows the device to still provide adjustment functions when the excitation system is not powered.

[0036] Preferably, the remote control unit adjusts the amount of oil in the insulating oil tank in real time through a micro hydraulic pump based on the swing and vibration data collected in real time by the unit monitoring system, thereby changing the weight and orientation of the counterweight and thus adjusting the rotor dynamic balance in real time.

[0037] Preferably, the remote control unit acquires data from the unit monitoring system via wireless transmission. The remote control unit also controls the micro hydraulic pumps within each dynamic balancing unit via wireless transmission.

[0038] Furthermore, since the corresponding dynamic balance adjustment units on the upper and lower ring plates of the rotor are interconnected through pipelines, the remote control unit adjusts the corresponding micro hydraulic pumps of each dynamic balance adjustment unit to achieve the coordination of each dynamic balance adjustment unit on the upper and lower ring plates of the rotor, thereby realizing the adjustment of the counterweight position in the vertical direction, i.e., the z-direction, and making the adjustment more precise.

[0039] Example 2 Based on Example 1, this embodiment discloses a method for real-time dynamic adjustment of the dynamic balance of a hydro-generator set, wherein the method is implemented based on the real-time dynamic adjustment device for the dynamic balance of the hydro-generator set described in Example 1.

[0040] The method for real-time dynamic adjustment of the dynamic balance of the hydro-generator unit includes: S1: Install the 8 dynamic balancing adjustment units on the upper ring plate and the lower ring plate of the rotor, respectively; S2: The remote control unit controls the amount of oil in each dynamic balance adjustment unit in a plane, so that the four dynamic balance adjustment units in a single plane generate a counterweight in a specified direction. S3: As the counterweight orientation changes, the unit's vibration and sway are monitored in real time. Based on the real-time monitoring of the unit's vibration and sway, the counterweight orientation is obtained when the vibration and sway data meet the preset values. S4: After the counterweight orientation is determined, increase or decrease the oil quantity at the corresponding orientation, including: Based on the real-time monitoring of the unit's vibration and sway, the control system synthesizes the sway in the X and Y directions in the current plane according to the sway and phase information in the current plane. Based on the synthesized data, the corresponding oil pump is controlled to output oil to the direction with less vibration, thereby reducing the vibration. When the vibration and sway data are detected to meet the preset values, the optimal value of the counterweight in the corresponding direction is obtained. S5: After completing the adjustment of one plane, adjust the oil volume in the four dynamic balance adjustment units in another plane, and repeat steps S2-S5 to determine the weight and orientation of the counterweight in the other plane.

[0041] S6: By adjusting the weight distribution of the counterweights in the two planes of the upper and lower ring plates of the rotor, that is, by adjusting the position of the counterweights in the vertical direction, i.e. the z-direction, the vibration and sway of the unit can be further reduced.

[0042] The device and method of this application perform real-time analysis and synthesis of data monitored by the unit monitoring system, and perform timely counterweighting based on the aforementioned data, effectively avoiding the shortcomings of existing counterweighting methods such as weak adaptability, cumbersome operation, and counterweighting only on a plane.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A real-time dynamic adjustment device for the dynamic balance of a hydro-generator set, characterized in that, The real-time dynamic balance adjustment device for the hydro-generator set includes: eight dynamic balance adjustment units symmetrically arranged on the upper and lower ring plates of the rotor, and a remote control unit. Each dynamic balancing unit is connected via pipelines, and the remote control unit adjusts the rotor dynamic balance in real time by controlling the amount of insulating oil in each dynamic balancing unit.

2. The real-time dynamic adjustment device for dynamic balance of a hydro-generator unit as described in claim 1, characterized in that, The dynamic balancing adjustment unit includes: an insulating oil tank, a micro hydraulic pump, and pipelines; the insulating oil tank is connected to the pipelines via the micro hydraulic pump and is used to adjust the amount of insulating oil in the insulating oil tank within the corresponding dynamic balancing adjustment unit.

3. The real-time dynamic adjustment device for dynamic balance of a hydro-generator unit as described in claim 2, characterized in that, The insulating mailboxes in each dynamic balancing unit are equidistant from the center of the ring plate.

4. The real-time dynamic adjustment device for dynamic balance of a hydro-generator unit as described in claim 2, characterized in that, The dynamic balancing adjustment unit also includes a power supply module, the power supply module being powered through a DC excitation cable inside the rotor.

5. The real-time dynamic adjustment device for dynamic balance of a hydro-generator unit as described in claim 2, characterized in that, The remote control unit adjusts the amount of oil in the insulating oil tank in real time through a micro hydraulic pump based on the swing and vibration data collected in real time by the unit monitoring system, thereby changing the weight and orientation of the counterweight and adjusting the rotor dynamic balance in real time.

6. The real-time dynamic adjustment device for dynamic balance of a hydro-generator unit as described in claim 5, characterized in that, Since the dynamic balance adjustment units corresponding to the upper and lower ring plates of the rotor are interconnected through pipelines, the remote control unit adjusts the corresponding micro hydraulic pumps of each dynamic balance adjustment unit to achieve the coordination of each dynamic balance adjustment unit on the upper and lower ring plates of the rotor, thereby realizing the adjustment of the counterweight position in the vertical direction.

7. The real-time dynamic adjustment device for dynamic balancing of a hydro-generator unit as described in claim 5, characterized in that, The remote control unit acquires data collected by the unit monitoring system via wireless transmission.

8. The real-time dynamic adjustment device for dynamic balance of a hydro-generator unit as described in claim 2, characterized in that, The remote control unit controls the micro hydraulic pumps in each dynamic balancing unit via wireless transmission.

9. A method for real-time dynamic adjustment of the dynamic balance of a hydro-generator unit, characterized in that, The real-time dynamic balance adjustment method for hydro-generator sets is implemented based on the real-time dynamic balance adjustment device for hydro-generator sets according to any one of claims 1 to 8, and the real-time dynamic balance adjustment method for hydro-generator sets includes: S1: Install the 8 dynamic balancing adjustment units on the upper ring plate and the lower ring plate of the rotor, respectively; S2: The remote control unit controls the amount of oil in each dynamic balance adjustment unit in a plane, so that the four dynamic balance adjustment units in a single plane generate a counterweight in a specified direction. S3: As the counterweight orientation changes, the unit's vibration and sway are monitored in real time. Based on the real-time monitoring of the unit's vibration and sway, the counterweight orientation is obtained when the vibration and sway data meet the preset values. S4: After the counterweight orientation is determined, increase or decrease the oil quantity at the corresponding orientation, including: Based on the real-time monitoring of the unit's vibration and sway, the control system synthesizes the sway in the current plane according to the current in-plane sway and phase information. Based on the synthesized data, it controls the corresponding oil pump to output oil to the direction with less vibration, thereby reducing the vibration. When the vibration and sway data are detected to meet the preset values, the optimal value of the counterweight in the corresponding direction is obtained. S5: After completing the adjustment of one plane, adjust the oil volume in the four dynamic balance adjustment units in another plane, and repeat steps S2-S5 to determine the weight and orientation of the counterweight in the other plane.

10. The method for real-time dynamic adjustment of dynamic balance of a hydro-generator unit as described in claim 9, characterized in that, The method for real-time dynamic adjustment of the dynamic balance of the hydro-generator set also includes: S6: By adjusting the weight distribution of the counterweights in the two planes of the upper and lower rotor ring plates, the vibration and sway of the unit can be further reduced.

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