Composite damping base of large direct-current converter transformer

Abstract

The invention relates to the technical field of transformers, and particularly discloses a composite damping base of a large direct current converter transformer, which comprises a supporting seat, a movable plate and a mounting plate are slidably connected in the supporting seat, and a plurality of damping assemblies are arranged between the movable plate and the mounting plate. The damping assembly comprises a damping mechanism, a one-way mechanism, a circulating mechanism, a sealing seat and a supporting mechanism; when the converter transformer runs, vibration is transmitted to the connecting plate through the supporting base and the mounting plate, the supporting plate is driven by the movable shaft to drive the movable pipe to rotate in the sealing base, in the process, the push plate extrudes internal cooling liquid, and vibration energy is dissipated through the fluid viscous damping effect; and meanwhile, the hydraulic pressure difference generated between the push plate and the fixed plate promotes the cooling liquid to flow into the cooling pipe through the one-way mechanism, internal heat dissipation of the transformer is achieved through pipe internal circulation, and finally cooling liquid backflow is completed through the circulation mechanism, so that vibration energy is converted into fluid kinetic energy, and the dual functions of shock absorption and heat dissipation are achieved.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and in particular to a composite vibration damping base for a large DC converter transformer. Background Technology

[0002] Large DC converter transformers, as core converter equipment in high-voltage direct current (HVDC) transmission systems, encompass key functions such as AC / DC power conversion, voltage level transformation, and power transmission. Leveraging their bidirectional power transmission capabilities, ultra-high voltage insulation structure design, and tolerance to complex electromagnetic environments, they are irreplaceable in ultra-high voltage DC transmission projects and submarine cable interconnection systems. Because converter transformers experience low-frequency, wide-amplitude mechanical vibrations due to valve-side harmonic current excitation during operation, dedicated vibration isolation support devices are required to suppress these vibrations.

[0003] Traditional vibration isolation bases mainly use single passive vibration reduction devices such as spring isolators, rubber dampers, or hydraulic dampers. Such solutions not only fail to effectively attenuate the broadband vibration energy of converter transformers, but also pose a risk of resonance amplification with low-frequency vibration modes, leading to the expansion of the vibration frequency domain. On the other hand, a composite vibration reduction system that simply uses multiple types of vibration reduction elements not only increases the structural complexity of the base, but also causes additional vibration excitation due to installation accuracy deviations. Furthermore, there is a problem of mismatch in the frequency response characteristics of different vibration reduction elements, and the vibration reduction performance in each direction is coupled and interfered with each other, making it difficult to achieve coordinated suppression of broadband vibration.

[0004] Therefore, there is a need to provide a composite vibration damping base for large DC converter transformers, which aims to solve the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide a composite vibration damping base for a large DC converter transformer, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A composite vibration damping base for a large DC converter transformer includes a support base. A movable plate and a mounting plate are slidably connected inside the support base. Multiple vibration damping components are arranged between the movable plate and the mounting plate. Each vibration damping component includes a vibration damping mechanism, a one-way mechanism, a circulation mechanism, a sealing seat, and a support mechanism. A cooling pipe is arranged between the one-way mechanism and the circulation mechanism. The sealing seat is fixedly connected to the movable plate. The cooling pipe is filled with coolant.

[0008] The shock absorption mechanism includes a connecting plate, and there are multiple connecting plates. Each connecting plate has a movable shaft symmetrically slidably connected inside. A support plate is rotatably connected to the outside of each movable shaft. A movable tube is fixedly connected to the bottom of each support plate. A push plate is symmetrically fixedly connected inside each movable tube. Any two adjacent movable tubes are rotatably connected to the inside of the sealing seat.

[0009] The support mechanism includes fixed blocks symmetrically fixedly connected to the movable plate, a fixed rod fixedly connected between the two fixed blocks, and a fixed plate symmetrically fixedly connected to the outer side of the fixed rod.

[0010] As a further improvement to the above solution, mounting blocks are symmetrically installed inside the support base by bolts, the mounting plate is located between the mounting blocks and the support base, and support blocks are fixedly connected to the four bottom corners of the movable plate.

[0011] As a further improvement to the above solution, the one-way mechanism includes a one-way seat fixedly connected to one end of the cooling pipe. The cooling pipe is connected to one of the movable pipes through the one-way seat. A partition plate is fixedly connected inside the one-way seat. Four support sleeves are fixedly connected to the inner wall of one end of the one-way seat. A movable rod is slidably connected inside the support sleeve. A sealing block is fixedly connected to the outer side of the movable rod. A spring is fixedly connected between the support sleeve and the movable rod. Four through slots are evenly opened at the end of the partition plate near the fixed plate.

[0012] As a further improvement to the above solution, the circulation mechanism includes a circulation seat fixedly connected to the other end of the cooling pipe. The cooling pipe is connected to another movable pipe through the circulation seat. A fixed plate is fixedly connected between the circulation seat and the fixed rod. A movable plate is rotatably connected inside the circulation seat. The movable plate is fixedly connected to the push plate. A push block is also slidably connected inside the circulation seat. A spring is fixedly connected between the push block and the circulation seat. The fixed rod passes through the push block and the movable plate.

[0013] As a further improvement to the above solution, a fixing sleeve is rotatably connected to the outside of the fixing rod, the partition plate is fixedly connected to the outside of the fixing sleeve, and the sealing blocks are all slidably connected to the outer wall of the fixing sleeve.

[0014] As a further improvement to the above solution, the bottom of the support plate is symmetrically and fixedly connected with connecting blocks, and a support strip is fixedly connected between any two adjacent sealing seats. Multiple springs are fixedly connected between the support strip and the connecting block.

[0015] As a further improvement to the above solution, the support bar is internally fixedly connected with multiple limiting rods, and each spring is sleeved on the outside of the limiting rods.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] When the converter transformer is running, the vibration is transmitted to the connecting plate through the support base and mounting plate. The moving shaft drives the support plate to rotate the moving tube inside the sealing seat. During this process, the push plate squeezes the internal coolant, dissipating the vibration energy by utilizing the fluid viscosity damping effect. While increasing the vibration frequency domain, the hydraulic difference generated between the push plate and the fixed plate causes the coolant to flow into the cooling tube through the one-way mechanism. The internal heat dissipation of the transformer is achieved through circulation in the tube. Finally, the circulation mechanism completes the coolant return, thereby converting the vibration energy into fluid kinetic energy and achieving the dual functions of vibration reduction and heat dissipation.

[0018] The sealing seat is fixed to multiple sets of springs by the support bar. The support plate is rigidly connected to the springs by the connecting block. The elastic deformation of the springs provides dynamic support to the connecting plate, ensuring that it still has vibration buffer space under transformer load. In addition, the limit rod provides guidance and constraint to the movable tube, which not only ensures rotational stability but also avoids the risk of lateral bending of the springs when they are under load. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the support base of the present invention;

[0022] Figure 3 This is a schematic diagram of the bottom structure of the support base of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the shock absorption component of the present invention;

[0024] Figure 5 This is a schematic diagram of the shock absorption mechanism of the present invention;

[0025] Figure 6 This is a schematic diagram of the connecting block of the present invention;

[0026] Figure 7 This is a schematic diagram of the internal structure of the active tube of the present invention;

[0027] Figure 8 This is a schematic diagram of the unidirectional mechanism of the present invention;

[0028] Figure 9This is a schematic diagram of the support mechanism of the present invention;

[0029] Figure 10 This is a schematic diagram of the internal structure of the support sleeve of the present invention.

[0030] In the diagram: 1. Support base; 2. Movable plate; 3. Support block; 4. Mounting block; 5. Mounting plate; 6. Shock absorption assembly; 61. Shock absorption mechanism; 611. Connecting plate; 612. Support plate; 613. Movable shaft; 614. Connecting block; 615. Support bar; 616. Limiting rod; 617. Movable tube; 618. Push plate; 619. Spring 1; 62. One-way mechanism; 621. One-way seat; 622. Fixed sleeve; 623. Sealing block; 624. Support sleeve; 625. Movable rod; 626. Spring 2; 627. Divider plate; 63. Circulation mechanism; 631. Circulation seat; 632. Movable disc; 633. Fixed disc; 634. Push block; 635. Spring 3; 64. Sealing seat; 65. Support mechanism; 651. Fixed rod; 652. Fixed plate; 653. Fixed block; 7. Cooling pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0032] Please see Figures 1 to 10 As shown, the present invention provides an embodiment:

[0033] A composite vibration damping base for a large DC converter transformer includes a support base 1. A movable plate 2 and a mounting plate 5 are slidably connected inside the support base 1. Multiple vibration damping components 6 are arranged between the movable plate 2 and the mounting plate 5. Each vibration damping component 6 includes a vibration damping mechanism 61, a one-way mechanism 62, a circulation mechanism 63, a sealing seat 64, and a support mechanism 65. A cooling pipe 7 is arranged between the one-way mechanism 62 and the circulation mechanism 63. The sealing seat 64 is fixedly connected to the movable plate 2. The cooling pipe 7 is filled with coolant.

[0034] The shock absorption mechanism 61 includes a connecting plate 611. There are multiple connecting plates 611. Each connecting plate 611 has a movable shaft 613 symmetrically slidably connected inside. The outer side of each movable shaft 613 is rotatably connected to a support plate 612. The bottom of each support plate 612 is fixedly connected to a movable tube 617. Each movable tube 617 has a push plate 618 symmetrically fixedly connected inside. Any two adjacent movable tubes 617 are rotatably connected to the inside of the sealing seat 64.

[0035] The support mechanism 65 includes fixed blocks 653 symmetrically fixedly connected to the movable plate 2, a fixed rod 651 fixedly connected between the two fixed blocks 653, and a fixed plate 652 symmetrically fixedly connected to the outside of the fixed rod 651.

[0036] In practical applications, the embodiments of the present invention, such as Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, when a large DC converter transformer vibrates during operation, the vibration load is transmitted to the mounting plate 5 via the support base 1, which drives the connecting plate 611. The connecting plate 611 drives the support plate 612 via the movable shaft 613, which in turn causes the movable tube 617 to rotate within the sealing seat 64. The push plate 618 inside the movable tube 617 squeezes the coolant, and the vibration kinetic energy is converted into heat energy by utilizing the fluid viscosity damping effect, thus achieving vibration energy dissipation.

[0037] During the rotation of the movable tube 617, it forms a relative motion with the fixed plate 652 on the outside of the fixed rod 651, generating a hydraulic differential. This pressure drives the coolant to flow into the cooling pipe 7 through the one-way mechanism 62. The coolant circulates inside the transformer through the cooling pipe 7, carrying away the heat generated by the operation of the equipment. Finally, the coolant flows back to the cooling pipe 7 through the circulation mechanism 63, completing the heat dissipation cycle.

[0038] During this process, the fixed rod 651 of the support mechanism 65 provides a rotation fulcrum for the movable tube 617, ensuring its motion stability and realizing the dual functions of converting vibration energy into fluid kinetic energy, shock absorption and heat dissipation.

[0039] like Figure 2 As shown, mounting blocks 4 are symmetrically installed inside the support base 1 by bolts, and mounting plate 5 is located between mounting blocks 4 and support base 1. Support blocks 3 are fixedly connected to the four corners of the bottom of the movable plate 2.

[0040] In practical application, the support base 1 is symmetrically fixed with mounting blocks 4 by bolts to form a positioning and installation structure. The mounting plate 5 is embedded between the mounting block 4 and the support base 1, and a rigid connection is achieved by pre-tightening the bolts to ensure the stability of the converter transformer installation interface. The four corners of the bottom of the movable plate 2 are rigidly connected with support blocks 3 to provide four-point support for the movable plate 2.

[0041] like Figure 8 and Figure 10As shown, the one-way mechanism 62 includes a one-way seat 621 fixedly connected to one end of the cooling pipe 7. The cooling pipe 7 is connected to one of the movable pipes 617 through the one-way seat 621. A partition plate 627 is fixedly connected inside the one-way seat 621. Four support sleeves 624 are fixedly connected to the inner wall of one end of the one-way seat 621. A movable rod 625 is slidably connected inside the support sleeve 624. A sealing block 623 is fixedly connected to the outer side of the movable rod 625. A spring 626 is fixedly connected between the support sleeve 624 and the movable rod 625. Four through slots are evenly opened at the end of the partition plate 627 near the fixed plate 652. A fixed sleeve 622 is rotatably connected to the outer side of the fixed rod 651. The partition plate 627 is fixedly connected to the outer side of the fixed sleeve 622. The sealing blocks 623 are all slidably connected to the outer wall of the fixed sleeve 622.

[0042] In practical application, when the movable tube 617 rotates and squeezes the coolant, the coolant pressure drives the sealing block 623 to overcome the elastic force of the second spring 626, slide along the outer wall of the fixed sleeve 622 and move away from the partition plate 627, thus opening the through groove. The coolant flows into the cooling tube 7 through the one-way seat 621. When the movable tube 617 rotates in the opposite direction, the coolant pressure decreases, and the second spring 626 pushes the sealing block 623 to reset, tightly adhering to the partition plate 627 to close the through groove and prevent coolant backflow. The support sleeve 624 provides a sliding guide for the movable rod 625, ensuring the movement accuracy of the sealing block 623. The rotational connection between the fixed sleeve 622 and the fixed rod 651 enables the one-way mechanism 62 and the support mechanism 65 to form a coordinated movement, realizing the one-way flow control of the coolant and ensuring the efficient operation of the heat dissipation circulation.

[0043] like Figure 9 As shown, the circulation mechanism 63 includes a circulation seat 631 fixedly connected to the other end of the cooling pipe 7. The cooling pipe 7 is connected to another movable pipe 617 through the circulation seat 631. A fixed plate 633 is fixedly connected between the circulation seat 631 and the fixed rod 651. A movable plate 632 is rotatably connected inside the circulation seat 631. The movable plate 632 is fixedly connected to the push plate 618. A push block 634 is also slidably connected inside the circulation seat 631. A spring 635 is fixedly connected between the push block 634 and the circulation seat 631. The fixed rod 651 passes through the push block 634 and the movable plate 632.

[0044] In practical application, when the movable tube 617 is rotated by vibration, the push plate 618 synchronously drives the movable disk 632 to rotate within the circulation seat 631. The movable disk 632 aligns with the flow channel of the fixed disk 633 to form a coolant flow path. Based on the volume change caused by the rotation of the push plate 618, the negative pressure in the movable tube 617 drives the coolant to flow from the cooling pipe 7 through the circulation seat 631, compensating for the volume increase. When the movable tube 617 returns to its original position, the damping effect generated by fluid compression can further dissipate vibration energy. The elastic buffer design of the spring 635 provides pressure compensation space for the closed-loop system, ensuring the stability of dynamic pressure during coolant circulation.

[0045] like Figure 5 and Figure 6 As shown, a connecting block 614 is symmetrically fixedly connected to the bottom of the support plate 612, and a support strip 615 is fixedly connected between any two adjacent sealing seats 64. Multiple springs 619 are fixedly connected between the support strip 615 and the connecting block 614. Multiple limiting rods 616 are fixedly connected inside the support strip 615, and the springs 619 are all sleeved on the outside of the limiting rods 616.

[0046] In practical applications, when a vibration load is applied to the support plate 612, the connecting block 614 transmits the load to the spring 619. The initial vibration energy is absorbed through the elastic deformation of the spring. The support bar 615 serves as the rigid foundation of the elastic support structure, ensuring the stability of the deformation direction of the spring 619. The limiting rod 616 forms a radial constraint on the spring 619, preventing it from buckling or becoming unstable under high-frequency vibration. At the same time, it limits the maximum deformation of the spring, avoiding material yielding failure.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite vibration damping base for a large DC converter transformer, comprising a support base (1), characterized in that: The support base (1) is internally slidably connected to a movable plate (2) and a mounting plate (5). Multiple shock-absorbing components (6) are arranged between the movable plate (2) and the mounting plate (5). Each shock-absorbing component (6) includes a shock-absorbing mechanism (61), a one-way mechanism (62), a circulation mechanism (63), a sealing seat (64), and a support mechanism (65). A cooling pipe (7) is arranged between the one-way mechanism (62) and the circulation mechanism (63). The sealing seat (64) is fixedly connected to the movable plate (2). The cooling pipe (7) is filled with coolant. The shock absorption mechanism (61) includes a connecting plate (611), and there are multiple connecting plates (611). Each connecting plate (611) has a movable shaft (613) symmetrically slidably connected inside. The outer side of each movable shaft (613) is rotatably connected to a support plate (612). The bottom of each support plate (612) is fixedly connected to a movable tube (617). The interior of each movable tube (617) is symmetrically fixedly connected to a push plate (618). Any two adjacent movable tubes (617) are rotatably connected to the interior of the sealing seat (64). The support mechanism (65) includes fixed blocks (653) symmetrically fixedly connected to the movable plate (2), a fixed rod (651) fixedly connected between the two fixed blocks (653), and a fixed plate (652) symmetrically fixedly connected to the outside of the fixed rod (651).

2. The composite vibration damping base for a large DC converter transformer according to claim 1, characterized in that: The support base (1) is symmetrically equipped with mounting blocks (4) by bolts. The mounting plate (5) is located between the mounting block (4) and the support base (1). The four bottom corners of the movable plate (2) are all fixedly connected with support blocks (3).

3. The composite vibration damping base for a large DC converter transformer according to claim 2, characterized in that: The one-way mechanism (62) includes a one-way seat (621) fixedly connected to one end of the cooling pipe (7). The cooling pipe (7) is connected to one of the movable pipes (617) through the one-way seat (621). A partition plate (627) is fixedly connected inside the one-way seat (621). Four support sleeves (624) are fixedly connected to the inner wall of one end of the one-way seat (621). A movable rod (625) is slidably connected inside the support sleeve (624). A sealing block (623) is fixedly connected to the outer side of the movable rod (625). A second spring (626) is fixedly connected between the support sleeve (624) and the movable rod (625). Four through slots are evenly opened at one end of the partition plate (627) near the fixed plate (652).

4. The composite vibration damping base for a large DC converter transformer according to claim 2, characterized in that: The circulation mechanism (63) includes a circulation seat (631) fixedly connected to the other end of the cooling pipe (7). The cooling pipe (7) is connected to another movable pipe (617) through the circulation seat (631). A fixed plate (633) is fixedly connected between the circulation seat (631) and the fixed rod (651). A movable plate (632) is rotatably connected inside the circulation seat (631). The movable plate (632) is fixedly connected to the push plate (618). A push block (634) is also slidably connected inside the circulation seat (631). A spring (635) is fixedly connected between the push block (634) and the circulation seat (631). The fixed rod (651) passes through the push block (634) and the movable plate (632).

5. The composite vibration damping base for a large DC converter transformer according to claim 3, characterized in that: A fixing sleeve (622) is rotatably connected to the outside of the fixing rod (651), the partition plate (627) is fixedly connected to the outside of the fixing sleeve (622), and the sealing blocks (623) are all slidably connected to the outer wall of the fixing sleeve (622).

6. The composite vibration damping base for a large DC converter transformer according to claim 2, characterized in that: The bottom of the support plate (612) is symmetrically fixedly connected with a connecting block (614), and a support strip (615) is fixedly connected between any two adjacent sealing seats (64). A plurality of springs (619) are fixedly connected between the support strip (615) and the connecting block (614).

7. The composite vibration damping base for a large DC converter transformer according to claim 6, characterized in that: The support bar (615) has multiple limiting rods (616) fixedly connected inside, and the springs (619) are all sleeved on the outside of the limiting rods (616).

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