Dynamic balance self-adaptive adjusting device for steam turbine rotor

Abstract

The invention discloses a steam turbine rotor dynamic balance self-adaptive adjusting device which comprises a plurality of balance assemblies, the balance assemblies are evenly distributed in the circumferential direction, each balance assembly comprises a rotor shaft, a transmission rod and a hydraulic rod installed on the surface of the rotor shaft, one end of each transmission rod is connected with the corresponding hydraulic rod, and the other end of each transmission rod is connected with the corresponding hydraulic rod. The other end of the transmission rod is connected with a correction block, a sliding block is integrally formed at the bottom of the correction block and located on the surface of the connecting disc, and the device can guarantee the balance of the rotor shaft in rotation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of rotor dynamic balancing, and relates to a steam turbine rotor dynamic balancing self-adaptive adjusting device. BACKGROUND

[0002] Rotor dynamic balancing refers to achieving the balance state of the rotor by adding correction mass on the rotor to offset the unbalanced force. In a steam turbine, rotor imbalance can cause vibration and noise, and can even cause mechanical failure in severe cases. Through dynamic balancing, the operation state of the steam turbine can be improved, and the mechanical performance and reliability can be improved.

[0003] According to the search, the announcement No. CN218882295U discloses a steam turbine rotor assembly. In this technology, a "rotor body has a first shaft body and a second shaft body, a coupling, an impeller, the second shaft body is fixed with the impeller through a mounting piece, the left side of the mounting piece is fixed with the second shaft body through a left link ring block, the right end of the mounting piece is welded with a right link ring block, and the outer surface of the right link ring block is fixed through a fastening stud.

[0004] Although the design can solve the problem that the steam turbine sleeve fixed rotor assembly is in long-term contact with steam, which can accelerate the aging degree of the sleeve structure of the rotor assembly and shorten the service life of the rotor assembly, the device cannot guarantee the balance of the rotor shaft during rotation. The center of gravity of the rotor shaft in different directions is different, which can generate vibration and noise during rotation, and can even cause mechanical failure in severe cases, thereby affecting the work. SUMMARY

[0005] The purpose of the application is to overcome the shortcomings of the prior art, and provide a steam turbine rotor dynamic balancing self-adaptive adjusting device, which can guarantee the balance of the rotor shaft during rotation.

[0006] To achieve the above purpose, the application discloses a steam turbine rotor dynamic balancing self-adaptive adjusting device, which comprises a plurality of balancing components, wherein the balancing components are uniformly distributed in the circumferential direction, each balancing component comprises a rotor shaft, a transmission rod and a hydraulic rod installed on the surface of the rotor shaft, one end of the transmission rod is connected with the hydraulic rod, the other end of the transmission rod is connected with a correction block, and the bottom of the correction block is integrally formed with a sliding block.

[0007] The steam turbine rotor dynamic balancing self-adaptive adjusting device further improves in that:

[0008] Further, the surface of the rotor shaft is provided with a hydraulic valve assembly, and the hydraulic valve assembly is connected with the hydraulic rod.

[0009] Further, the hydraulic rod is inclinedly installed on the surface of the rotor shaft.

[0010] Further, the inclination angles of the hydraulic rods are the same.

[0011] Further, the hydraulic rod is connected with the hydraulic valve assembly through the connecting shaft.

[0012] Further, the transmission rod is rotationally connected with the correction block.

[0013] Further, the connecting shaft is rotationally connected with the transmission rod.

[0014] Further, the surface of the connecting disc is provided with a sliding groove, and the sliding block is matched with the sliding groove.

[0015] Further, the connecting disc is in the shape of a disc.

[0016] Further, the rotor shaft and the connecting disc are integrated.

[0017] The present application has the following advantages:

[0018] The steam turbine rotor dynamic balance self-adaptive adjusting device can make the correction block move along the surface of the connecting disc through the control of the hydraulic rod, so that the length of the correction block from the rotor shaft changes, thereby accurately controlling the center of gravity of the rotor shaft when rotating, making the rotation of the rotor shaft have high balance, effectively avoiding the generation of vibration and noise due to imbalance, reducing the occurrence of mechanical failure, and avoiding excessive wear, prolonging the service life of the rotor shaft. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings constituting a part of the specification of the present application are used to provide a further understanding of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 It is a schematic diagram of the structure of the correction block 6 and the connecting disc 9 in the present application;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of the connecting disc 9 in the present application;

[0023] Figure 4 It is a schematic diagram of the explosion structure in the present application.

[0024] In the present application, 1 is a rotor shaft, 2 is a hydraulic valve assembly, 3 is a hydraulic rod, 4 is a connecting shaft, 5 is a transmission rod, 6 is a correction block, 7 is a sliding block, 8 is a sliding groove, and 9 is a connecting disc. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0026] In the description of the present application, it should be understood that the terms "comprising" and "including" indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or sets thereof.

[0027] It should also be understood that the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and the appended claims of the present application, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should be further understood that the term "and / or" used in the specification and the appended claims of the present application means any combination of one or more of the associated listed items and all possible combinations thereof, and includes these combinations, for example, A and / or B can represent three cases of A alone, A and B together, and B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0029] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present application to describe the preset ranges, etc., these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from each other. For example, the first preset range can also be referred to as the second preset range, and similarly, the second preset range can also be referred to as the first preset range without departing from the scope of the embodiments of the present application.

[0030] Depending on the context, the word "if" as used herein can be interpreted to mean "when" or "while" or "in response to determining" or "in response to detecting". Similarly, the phrase "if determined" or "if detecting (a stated condition or event)" can be interpreted to mean "when determined" or "in response to determining" or "when detecting (a stated condition or event)" or "in response to detecting (a stated condition or event)", depending on the context.

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0032] Various structural schematic diagrams according to the disclosed embodiments of the present application are shown in the drawings. These diagrams are not drawn to scale, in which some details are exaggerated for the purpose of clear expression, and some details can be omitted. The shapes of various regions, layers and their relative size and positional relationship shown in the drawings are only exemplary, and in actuality, there can be deviations due to manufacturing tolerances or technical limitations, and regions / layers with different shapes, sizes and relative positions can be additionally designed by those skilled in the art according to actual needs.

[0033] Embodiment one

[0034] The steam turbine rotor dynamic balancing self-adaptive adjusting device described in the present application comprises a plurality of balancing components, wherein each balancing component is uniformly distributed in the circumferential direction, each balancing component comprises a rotor shaft 1, a transmission rod 5 and a hydraulic rod 3 installed on the surface of the rotor shaft 1, one end of the transmission rod 5 is connected with the hydraulic rod 3, the other end of the transmission rod 5 is connected with a correction block 6, the bottom of the correction block 6 is integrally formed with a sliding block 7, and the sliding block 7 is located on the surface of a connecting disc 9.

[0035] Embodiment two

[0036] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In order to further improve the present application, the steam turbine rotor dynamic balancing self-adaptive adjusting device described in the present application comprises a plurality of balancing components, wherein each balancing component is uniformly distributed in the circumferential direction, each balancing component comprises a rotor shaft 1, a transmission rod 5 and a hydraulic rod 3 installed on the surface of the rotor shaft 1, one end of the transmission rod 5 is connected with the hydraulic rod 3, the other end of the transmission rod 5 is connected with a correction block 6, and the correction block 6 is arranged on the surface of a connecting disc 9.

[0037] In working, the hydraulic rod 3 can drive the correction block 6 to move through the transmission rod 5 when the hydraulic rod 3 is in telescopic operation, and can change the length of the correction block 6 from the rotor shaft 1 when the correction block 6 and the connecting disc 9 slide, thereby adjusting the gravity center of the rotor shaft 1 through the moved correction block 6 when the rotor shaft 1 rotates, so that the rotor shaft 1 can stably rotate.

[0038] In the embodiment, the surface of the rotor shaft 1 is fixedly provided with the hydraulic valve assembly 2, and the hydraulic valve assembly 2 is fixedly connected with the hydraulic rod 3.

[0039] In working, the hydraulic valve assembly 2 fixedly provided on the surface of the rotor shaft 1 can control the hydraulic rod 3, so that the displacement of the correction block 6 can be stably realized.

[0040] In the embodiment, the hydraulic rod 3 is obliquely arranged on the surface of the rotor shaft 1, and the hydraulic rod 3 is connected with the hydraulic rod 3 through the connecting shaft 4, and the inclination angles of the hydraulic rods 3 are the same.

[0041] In working, the hydraulic rod 3 can drive the correction block 6 to displace, and can avoid that the mass of one side of the rotor shaft 1 is too large or too small, thereby affecting the stability of the rotation.

[0042] In the embodiment, the connecting shaft 4 is rotatably connected with the transmission rod 5, the transmission rod 5 is rotatably connected with the correction block 6, and the bottom of the correction block 6 is integrally formed with the sliding block 7.

[0043] In working, the transmission rod 5 can drive the connecting shaft 4 to transmit power to the correction block 6 through the transmission rod 5, thereby effectively driving the correction block 6 to displace.

[0044] In the embodiment, the surface of the connecting disc 9 is provided with the sliding groove 8, and the sliding block 7 is matched with the sliding groove 8, in working, the sliding groove 8 can provide a stable path for the sliding of the sliding block 7, thereby enabling the correction block 6 to accurately displace, thereby completing the balancing effect.

[0045] In the embodiment, the connecting disc 9 is disc-shaped, and the rotor shaft 1 and the connecting disc 9 form an integrated structure, and it should be noted that the disc-shaped connecting disc 9 can prevent the connecting disc 9 from deviating the gravity center of the rotor shaft 1 in all directions when the rotor shaft 1 rotates, thereby enabling the rotor shaft 1 to stably rotate.

[0046] The working principle of the present application is as follows:

[0047] When the rotor shaft 1 rotates, it may vibrate and produce noise due to its own imbalance. Workers can collect relevant parameters to determine the amount of imbalance and phase of the rotor shaft 1. At this time, the hydraulic valve assembly 2 under the control of the terminal will drive the hydraulic rod 3 on one side to extend or contract. At this time, the connecting shaft 4 will produce rotation between the transmission rod 5. The other end of the transmission rod 5 will pull the correction block 6 and the sliding block 7 to slide along the sliding groove 8 on the surface of the connecting disc 9. During the sliding process, the position of the correction block 6 from the rotor shaft 1 changes. When the rotor shaft 1 rotates, the correction block 6 will offset the imbalance of the rotor shaft 1, so that the rotor shaft 1 can rotate stably. The hydraulic rod 3 and the correction block 6 can cooperate with each other, so that the rotor shaft 1 is uniform in all directions, so as to avoid vibration and noise, and reduce the possibility of mechanical failure.

[0048] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0049] It is to be understood that the application is not limited to the precise construction described and as shown in the attached drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims that follow.

[0050] The above description is only the preferred embodiment of the present application, not any limitation to the present application, any simple modification, change and equivalent structure change according to the technical essence of the present application to the above embodiment, still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A dynamic balance adaptive adjustment device for a steam turbine rotor, characterized in that, It includes several balancing components, wherein each balancing component is evenly distributed along the circumference. Each balancing component includes a rotor shaft (1), a transmission rod (5), and a hydraulic rod (3) mounted on the surface of the rotor shaft (1). One end of the transmission rod (5) is connected to the hydraulic rod (3), and the other end of the transmission rod (5) is connected to a correction block (6). The bottom of the correction block (6) is integrally formed with a slider (7), and the slider (7) is located on the surface of the connecting plate (9).

2. The turbine rotor dynamic balance adaptive adjustment device according to claim 1, characterized in that, A hydraulic valve assembly (2) is mounted on the surface of the rotor shaft (1), and the hydraulic valve assembly (2) is connected to the hydraulic rod (3).

3. The turbine rotor dynamic balance adaptive adjustment device according to claim 1, characterized in that, The hydraulic rod (3) is mounted at an angle on the surface of the rotor shaft (1).

4. The turbine rotor dynamic balance adaptive adjustment device according to claim 3, characterized in that, The tilt angles of each hydraulic rod (3) are the same.

5. The turbine rotor dynamic balance adaptive adjustment device according to claim 1, characterized in that, The hydraulic rod (3) is connected to the hydraulic valve assembly (2) via the connecting shaft (4).

6. The turbine rotor dynamic balance adaptive adjustment device according to claim 1, characterized in that, The transmission rod (5) is rotatably connected to the correction block (6).

7. The turbine rotor dynamic balance adaptive adjustment device according to claim 1, characterized in that, The connecting shaft (4) and the transmission rod (5) are rotatably connected.

8. The turbine rotor dynamic balance adaptive adjustment device according to claim 1, characterized in that, The surface of the connecting plate (9) is provided with a groove (8), and the slider (7) cooperates with the groove (8).

9. The turbine rotor dynamic balance adaptive adjustment device according to claim 1, characterized in that, The connecting disk (9) is disc-shaped.

10. The turbine rotor dynamic balance adaptive adjustment device according to claim 1, characterized in that, The rotor shaft (1) and the connecting disc (9) form an integrated structure.

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