A harmonic controller based on power electronic harmonic suppression technology

Abstract

This invention relates to a harmonic controller based on power electronic harmonic suppression technology, belonging to the field of harmonic controller technology. It includes a first mounting base, a second mounting base slidably mounted on the first mounting base, and a harmonic controller housing inserted into the second mounting base. The first and second mounting bases are connected by a locking mechanism. Two sets of damping mechanisms are provided on the inner sides of both the first and second mounting bases. Each damping mechanism includes a damping cavity, an air bladder, and a moving cavity. A damping piston rod is slidably mounted inside the damping cavity, and a damping plate is fixedly mounted on the damping piston rod. The damping cavity is connected to the air bladder and the moving cavity via a connecting pipe. The damping plate inside the first mounting base is connected to the harmonic controller housing via a clamping mechanism, and the damping plate inside the second mounting base is fixedly connected to the harmonic controller housing. This invention solves the problem of long-term vibration affecting the internal wiring connections and normal operation of the harmonic controller.

Description

Technical Field

[0001] This invention belongs to the field of harmonic controller technology, specifically relating to a harmonic controller based on power electronic harmonic suppression technology. Background Technology

[0002] With the rapid development of modern industry and smart grids, a large number of nonlinear power electronic devices, such as frequency converters and rectifiers, are connected to the power grid. The harmonic currents and voltages they generate seriously threaten the safe and stable operation of the power system. Harmonics can not only cause electrical equipment to overheat and increase losses, but also cause problems such as malfunction of relay protection devices and interference with communication systems, and even cause power grid collapse. Harmonic controllers are key devices developed to solve this problem. Their core purpose is to monitor the harmonic parameters of the power grid in real time and suppress the injection of harmonic currents through active or passive compensation technology, thereby improving power quality and ensuring the efficient and safe operation of the power system. Harmonic controllers are usually installed near the harmonic source, on the low-voltage side of the power distribution system, such as the low-voltage distribution cabinet busbar side in workshops or factories, to directly target harmonic generating equipment such as frequency converters and electric arc furnaces for centralized management.

[0003] After existing harmonic controllers are installed and put into use, the power devices inside the controller may vibrate due to the periodic changes in electromagnetic force when operating at high frequency. In addition, if the cooling fan is not dynamically balanced or there is friction between the fan blades and the air duct when it runs at high speed, vibration will also be caused. Most existing harmonic controllers are fixed directly to the surface of a special bracket inside the cabinet with screws. Long-term vibration may cause the internal wiring to loosen, resulting in poor contact, affecting the normal operation of the equipment, accelerating the aging of components, and shortening the service life of the harmonic controller. Summary of the Invention

[0004] This invention overcomes the shortcomings of existing technologies and proposes a harmonic controller based on power electronic harmonic suppression technology; it solves the problem that long-term vibration affects the connection of the internal circuitry of the harmonic controller and the normal operation of the equipment.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0006] A harmonic controller based on power electronic harmonic suppression technology includes a first mounting base, a second mounting base slidably mounted on the first mounting base, and a harmonic controller housing inserted into the second mounting base. The first and second mounting bases are connected by a locking mechanism. Two sets of damping mechanisms are provided on the inner sides of both the first and second mounting bases. Each damping mechanism includes a damping cavity, an air bladder, and a moving cavity. A damping piston rod is slidably mounted inside the damping cavity, and a damping plate is fixedly mounted at one end of the outer side of the damping piston rod. A pressing piston rod is slidably mounted inside the moving cavity, and a pressing block is fixedly mounted on the outer side of the pressing piston rod. The damping cavity is connected to the air bladder via a first connecting pipe and to the moving cavity via a second connecting pipe. The damping plate inside the first mounting base is connected to the harmonic controller housing via a clamping mechanism, and the damping plate inside the second mounting base is fixedly connected to the harmonic controller housing.

[0007] Furthermore, the first mounting base includes a first rear side plate, a first left side plate, a first right side plate, and a top plate. The rear end of the top plate is fixedly connected to the upper end of the first rear side plate. The left and right ends of the top plate are respectively fixedly connected to the upper ends of the first left side plate and the first right side plate. The left and right ends of the first rear side plate are respectively fixedly connected to the rear ends of the first left side plate and the first right side plate. The front-to-back length of the top plate is greater than the front-to-back length of the first left side plate and the first right side plate, and the height of the first rear side plate is equal to the height of the first left side plate and the first right side plate. The second mounting base includes a second rear side plate, a second left side plate, a second right side plate, and a bottom plate. Both the second left side plate and the second right side plate include a front half and a rear half. The bottom ends of the first half and the second half overlap, and the height of the first half is greater than the height of the second half. The left and right ends of the bottom plate are fixedly connected to the lower ends of the second left side plate and the second right side plate, respectively. The left and right ends of the second rear side plate are fixedly connected to the rear ends of the second left side plate and the rear ends of the second right side plate, respectively. When the first mounting base and the second mounting base are connected, the first rear side plate and the second rear side plate overlap, the first left side plate and the second left side plate overlap, the first right side plate and the second right side plate overlap, and the left and right ends of the top plate contact the upper ends of the front half of the second left side plate and the upper ends of the front half of the second right side plate, respectively. At this time, the first mounting base and the second mounting base are combined into a square box structure with an open front end.

[0008] Furthermore, a locking mechanism is provided between the front end of the first left side plate of the first mounting base and the rear end of the front half of the second left side plate of the second mounting base, and a locking mechanism is also provided between the front end of the first right side plate of the first mounting base and the rear end of the front half of the second right side plate of the second mounting base. The locking mechanism includes a locking block and a locking rod. A semi-circular groove is provided at the front end of the first left side plate and the front end of the first right side plate of the first mounting base, and a semi-circular groove is provided at the rear end of the front half of the second left side plate and the rear end of the front half of the second right side plate of the second mounting base. A fan-shaped groove is provided at one end of the inner side of each semi-circular groove, and the semi-circular groove and the fan-shaped groove are connected. A semi-circular locking block is rotatably provided inside each semi-circular groove, and a locking rod is fixedly provided in the middle of the outer arc surface of each locking block. The locking rod is located inside the fan-shaped groove.

[0009] Furthermore, the locking mechanism also includes a rotating handle and a return spring; a return spring is fixedly installed on the inner wall of the lower end of the two sector-shaped slots of the first mounting base, and a return spring is fixedly installed on the inner wall of the upper end of the two sector-shaped slots of the second mounting base, with the end of the return spring fixedly connected to the locking rod inside the sector-shaped slot; an arc-shaped actuating groove is provided on the outer wall of the two sector-shaped slots of the first mounting base, and a rotating handle is slidably installed inside each actuating groove, with the inner end of the two rotating handles fixedly connected to the ends of the two locking rods inside the first mounting base away from the locking block.

[0010] Furthermore, the two damping mechanisms inside the first mounting base are located at the two corners on the upper side of the first rear side plate, and the two damping mechanisms inside the second mounting base are located at the two corners on the lower side of the second rear side plate; the damping mechanism also includes a damping spring; each damping mechanism includes two damping chambers, which are interlocked; the front end of the damping chamber remains open, and the rear end of the damping chamber is fixedly connected to the first or second rear side plate; a damping piston rod is slidably arranged inside each damping chamber, and the same damping plate is fixedly arranged at one end of the outer side of the two damping piston rods; a damping spring is arranged between the two damping chambers, and the rear end of the damping spring is fixedly connected to the first or second rear side plate, and the front end of the damping plate is fixedly connected to the rear end face of the damping plate.

[0011] Furthermore, the airbags of the two sets of shock-absorbing mechanisms inside the first mounting base are respectively fixedly installed on the inner walls of the first left side plate and the first right side plate, and the airbags of the two sets of shock-absorbing mechanisms inside the second mounting base are respectively fixedly installed on the inner walls of the second left side plate and the second right side plate; the end of the first connecting pipe away from the airbag is connected to the internal space of the shock-absorbing cavity at the rear end of the shock-absorbing piston rod.

[0012] Furthermore, the pressing block has an L-shaped structure. The moving cavities of the two sets of shock-absorbing mechanisms inside the first mounting base are fixedly installed on the first rear side plate, and the pressing blocks of the two sets of shock-absorbing mechanisms inside the first mounting base are respectively fixedly installed at the two upper corners of the first rear side plate. The moving cavities of the two sets of shock-absorbing mechanisms inside the second mounting base are fixedly installed on the second rear side plate, and the airbags of the two sets of shock-absorbing mechanisms inside the second mounting base are respectively fixedly installed at the two lower corners of the second rear side plate. One end of the second connecting pipe is connected to the internal space of the moving cavity at the rear end of the pressing piston rod, and the other end of the second connecting pipe is connected to the internal space of the shock-absorbing cavity at the rear end of the shock-absorbing piston rod.

[0013] Furthermore, four square arrayed connecting blocks are fixedly installed on the rear end face of the harmonic controller housing. The two upper connecting blocks are connected to two damping plates inside the first mounting base through a clamping mechanism, and the two lower connecting blocks are fixedly connected to two damping plates inside the second mounting base.

[0014] Furthermore, the clamping mechanism includes a clamping block, an air chamber, a limiting piston rod, and a limiting spring; two symmetrical sliding grooves are provided on the front end face of the damping plate of the first mounting base, and a clamping block is slidably disposed inside each sliding groove. A piston groove extending to the left and right is provided on the side end face of the two sliding grooves that are far apart from each other. A limiting piston rod is slidably disposed inside each piston groove. A limiting spring is sleeved on the outer side of the two limiting piston rods that are close to each other. The end of the limiting spring that is far away from the limiting piston rod is fixedly connected to the clamping block on the same side; an air chamber is provided inside the damping plate of the first mounting base, and the air chamber is connected to the two piston grooves that are far apart from each other.

[0015] Furthermore, two vertical first sliding grooves are provided inside the first rear side plate of the first mounting base, and two vertical second sliding grooves are provided inside the second rear side plate of the second mounting base. A first exposed groove is provided at the front of the top of the first sliding groove, and a second exposed groove is provided at the front of the bottom of the second sliding groove. A vertical fixing spring is fixedly installed at the top of the first sliding groove and the bottom of the second sliding groove. An L-shaped first fixing rod is slidably installed inside each first sliding groove, abutting against the fixing spring inside the first sliding groove. An L-shaped second fixing rod is slidably installed inside each second sliding groove, abutting against the fixing spring inside the second sliding groove. Both the first and second fixing rods include a vertical section and a horizontal section. The upper end of the vertical section of a first fixed rod is fixedly connected to the rear end of the horizontal section. The vertical section of the first fixed rod slides inside the first sliding groove. The lower end of the vertical section of the first fixed rod extends to the outer side of the lower end of the first sliding groove. The horizontal section of the first fixed rod extends outward from the first exposed groove. A first snap-fit ​​groove is provided at the front end of the horizontal section of the first fixed rod, and the first snap-fit ​​groove snaps into the upper end of the damping plate inside the first mounting base. The lower end of the vertical section of a second fixed rod is fixedly connected to the rear end of the horizontal section. The vertical section of the second fixed rod slides inside the second sliding groove. The upper end of the vertical section of the second fixed rod extends to the outer side of the upper end of the second sliding groove. The horizontal section of the second fixed rod extends outward from the second exposed groove. A second snap-fit ​​groove is provided at the front end of the horizontal section of the second fixed rod, and the second snap-fit ​​groove snaps into the lower end of the damping plate inside the second mounting base.

[0016] The beneficial effects of this invention compared to the prior art are as follows:

[0017] 1. This invention, through its shock-absorbing mechanism, responds rapidly to vibrations generated during the operation of the harmonic controller. The elastic buffer quickly offsets the impact force, limiting the controller's displacement and preventing shaking. This avoids loosening of internal wiring or damage to components due to shaking, ensuring relative stability during vibration. Furthermore, the gas in the shock-absorbing chamber forms a resistance buffer structure to protect the shock-absorbing springs, slowing down the aging of the springs caused by long-term loads and improving the device's service life. The shock-absorbing plate, under vibration, compresses the shock-absorbing springs and the shock-absorbing piston rod. The compressed gas from the shock-absorbing piston rod passes through the first and second connecting pipes, causing the piston rod to push outwards, fixing the pressure block at the four corners of the harmonic controller housing. Simultaneously, the airbag rapidly expands, closely adhering to the sidewalls of the harmonic controller housing, further limiting the position of the housing from multiple directions, thus improving the overall service life and operational reliability of the harmonic controller.

[0018] 2. The present invention, through its locking mechanism, enables the locking block to respond quickly during the installation of the harmonic controller, instantly locking the first and second mounting seats together. This improves installation efficiency, ensures the stability of the harmonic controller during operation, and avoids loosening caused by vibration. When disassembling the harmonic controller, as the first and second mounting seats separate, the fixing rod locks the damping plate through the fixing groove, isolating the external force generated during disassembly. This prevents the damping mechanism from being pulled or collided by the workers during disassembly, reduces the risk of accidental damage to the damping mechanism, extends its service life, and reduces maintenance costs. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings:

[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 structure before the first mounting base and the second mounting base are connected. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the structure before the first mounting base and the second mounting base are connected. Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the structure of the harmonic controller housing;

[0024] Figure 5 This is a schematic diagram of the locking mechanism;

[0025] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle;

[0026] Figure 7 This is a structural diagram of the first mounting base and one of the shock absorption mechanisms;

[0027] Figure 8 This is a schematic diagram showing the connection between the first mounting base and the first fixing rod;

[0028] Figure 9 This is a partial connection diagram between the first fixed rod and the shock absorption mechanism;

[0029] Figure 10 This is a schematic diagram of the clamping mechanism;

[0030] Wherein, 1 is the harmonic controller housing, 101 is the connecting block, 2 is the first mounting base, 201 is the mounting hole, 202 is the locking block, 203 is the rotating handle, 204 is the reset spring, 205 is the locking rod, 3 is the second mounting base, 4 is the shock-absorbing plate, 401 is the shock-absorbing spring, 402 is the clamping block, 403 is the air chamber, 404 is the limiting piston rod, 405 is the limiting spring, 5 is the shock-absorbing cavity, 501 is the shock-absorbing piston rod, 6 is the airbag, 7 is the moving cavity, 701 is the pressing piston rod, 702 is the pressing block, 8 is the first fixing rod, 801 is the first snap-fit ​​groove, 802 is the fixing spring, and 9 is the second fixing rod. Detailed Implementation

[0031] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0032] like Figure 1 As shown in Figure 10, this invention provides a harmonic controller based on power electronic harmonic suppression technology, including a first mounting base 2, a second mounting base 3 slidably disposed on the first mounting base 2, and a harmonic controller housing 1 inserted into the second mounting base 3; the first mounting base 2 and the second mounting base 3 are connected by a locking mechanism; two sets of damping mechanisms are provided on the inner sides of both the first mounting base 2 and the second mounting base 3, each damping mechanism including a damping cavity 5, an air bladder 6, and a moving cavity 7; a damping piston rod 501 is slidably disposed inside the damping cavity 5, and a damping plate 4 is fixedly disposed at one end of the outer side of the damping piston rod 501; a pressing piston rod 701 is slidably disposed inside the moving cavity 7, and a pressing block 702 is fixedly disposed on the outer side of the pressing piston rod 701; the damping cavity 5 is connected to the air bladder 6 through a first connecting pipe, and the damping cavity 5 is connected to the moving cavity 7 through a second connecting pipe; the damping plate 4 inside the first mounting base 2 is connected to the harmonic controller housing 1 through a clamping mechanism, and the damping plate 4 inside the second mounting base 3 is fixedly connected to the harmonic controller housing 1.

[0033] The first mounting base 2 includes a first rear side plate, a first left side plate, a first right side plate, and a top plate, with the first left side plate and the first right side plate being symmetrical. The rear end of the top plate is fixedly connected to the upper end of the first rear side plate, and the left and right ends of the top plate are fixedly connected to the upper ends of the first left side plate and the first right side plate, respectively. The left and right ends of the first rear side plate are fixedly connected to the rear ends of the first left side plate and the first right side plate, respectively. The front-to-back length of the top plate is greater than the front-to-back length of the first left side plate and the first right side plate, and the height of the first rear side plate is equal to the height of the first left side plate and the first right side plate.

[0034] The second mounting base 3 includes a second rear side plate, a second left side plate, a second right side plate, and a base plate. The second left side plate and the second right side plate are symmetrical, and both the second left side plate and the second right side plate include a front half and a rear half, with their bottom ends overlapping. The height of the front half is greater than the height of the rear half. The left and right ends of the base plate are fixedly connected to the lower ends of the second left side plate and the second right side plate, respectively. The left and right ends of the second rear side plate are fixedly connected to the rear ends of the rear half of the second left side plate and the rear ends of the rear half of the second right side plate, respectively.

[0035] When the first mounting base 2 is connected to the second mounting base 3, the first rear side plate of the first mounting base 2 coincides with the second rear side plate of the second mounting base 3, the first left side plate of the first mounting base 2 coincides with the second left side plate of the second mounting base 3, the first right side plate of the first mounting base 2 coincides with the second right side plate of the second mounting base 3, and the left and right ends of the top plate of the first mounting base 2 contact the upper ends of the front half of the second left side plate and the upper ends of the front half of the second right side plate of the second mounting base 3, respectively. At this time, the first mounting base 2 and the second mounting base 3 are combined into a square box structure with an open front end.

[0036] Four square array mounting holes 201 are provided on the first rear side plate of the first mounting base 2. The first mounting base 2 can be firmly fixed to the surface of the bracket by bolts passing through the four mounting holes 201, forming a solid foundation support and avoiding the aggravation of vibration due to unstable installation.

[0037] A locking mechanism is provided between the front end of the first left side plate of the first mounting base 2 and the rear end of the front half of the second left side plate of the second mounting base 3, and a locking mechanism is also provided between the front end of the first right side plate of the first mounting base 2 and the rear end of the front half of the second right side plate of the second mounting base 3. The locking mechanism includes a locking block 202, a locking rod 205, a rotating handle 203, and a return spring 204.

[0038] A semi-circular groove is provided at the front end of the first left side plate and the front end of the first right side plate of the first mounting base 2. A semi-circular groove is provided at the rear end of the front half of the second left side plate and the rear end of the front half of the second right side plate of the second mounting base 3. A fan-shaped groove is provided at one end of the inner side of each semi-circular groove, and the semi-circular groove and the fan-shaped groove are connected. A semi-circular locking block 202 is rotatably installed inside each semi-circular groove, and the outer arc surface of the locking block 202 is in sliding contact with the inner arc surface of the semi-circular groove. A locking rod 205 is fixedly installed in the middle of the outer arc surface of each locking block 202. The locking rod 205 is located inside the fan-shaped groove, and the length direction of the locking rod 205 is set along the radial direction of the locking block 202.

[0039] On the inner wall of one end of each of the two sector-shaped slots of the first mounting base 2, there is an arc-shaped first mounting groove. An arc-shaped return spring 204 is fixedly installed inside each first mounting groove, with one end extending outwards and fixedly connected to a locking rod 205 inside the sector-shaped slot. On the outer wall of each of the two sector-shaped slots of the first mounting base 2, there is an arc-shaped actuating groove. A rotating handle 203 is slidably installed inside each actuating groove. One inner end of each rotating handle 203 is fixedly connected to the end of each of the two locking rods 205 inside the first mounting base 2, away from the locking block 202. By actuating the two rotating handles 203, the two locking rods 205 can be controlled to rotate inside the sector-shaped slots, and simultaneously, the two locking blocks 202 can be controlled to rotate inside the semi-circular grooves.

[0040] An arc-shaped second mounting groove is provided on the inner wall of one end of the two sector grooves of the second mounting base 3. An arc-shaped return spring 204 is fixedly installed inside each second mounting groove. The return spring 204 extends to the outer side of the second mounting groove and is fixedly connected to the locking rod 205 on the inner side of the sector groove.

[0041] When the locking block 202 inside the first mounting base 2 is not subjected to external force, under the restoring force of the return spring 204, the upper end of the locking block 202 rotates out to the outside of the semi-circular groove. When the locking block 202 inside the second mounting base 3 is not subjected to external force, under the restoring force of the return spring 204, the lower end of the locking block 202 rotates out to the outside of the semi-circular groove.

[0042] When the second mounting base 3 slides upward against the first mounting base 2 for installation, the upper ends of the two locking blocks 202 on the first mounting base 2 are squeezed by the second left side plate and the second right side plate of the second mounting base 3 and rotate back into the semi-circular groove. The lower ends of the two locking blocks 202 on the second mounting base 3 are squeezed by the first left side plate and the first right side plate of the first mounting base 2 and rotate back into the semi-circular groove. After the first mounting base 2 and the second mounting base 3 are connected, the locking block 202 inside the first mounting base 2 and the locking block 202 inside the second mounting base 3 combine to form a complete circular block structure. At this time, under the action of the return spring 204, the upper end of the locking block 202 inside the first mounting base 2 rotates into the semi-circular groove of the second mounting base 3, and the lower end of the locking block 202 inside the second mounting base 3 rotates into the semi-circular groove of the first mounting base 2. The locking block 202 inside the first mounting base 2 engages with the semi-circular groove of the second mounting base 3, and the locking block 202 inside the second mounting base 3 engages with the semi-circular groove of the first mounting base 2. The two locking blocks 202 interlock with each other, so that the first mounting base 2 and the second mounting base 3 are fixedly connected and cannot be automatically disengaged.

[0043] When it is necessary to detach the first mounting base 2 from the second mounting base 3, rotate the two rotating handles 203 to control the two locking rods 205 inside the first mounting base 2 to rotate inside the fan-shaped groove, so that the return spring 204 inside the first mounting base 2 is compressed, which drives the two locking blocks 202 inside the first mounting base 2 back into the two semi-circular grooves of the first mounting base 2. In this way, the two locking blocks 202 inside the second mounting base 3 also return into the two semi-circular grooves of the second mounting base 3, at which point the first mounting base 2 and the second mounting base 3 can be detached.

[0044] The two damping mechanisms inside the first mounting base 2 are located at the two corners on the upper side of the first rear side plate, and the two damping mechanisms inside the second mounting base 3 are located at the two corners on the lower side of the second rear side plate. Each damping mechanism also includes a damping spring 401.

[0045] Each damping mechanism includes two L-shaped damping chambers 5, which are interlocked. The front end of each damping chamber 5 remains open, and the rear end is fixedly connected to either the first or second rear side plate. An L-shaped damping piston rod 501 is slidably disposed inside each damping chamber 5. The same damping plate 4 is fixedly disposed at one end of the outer side of each of the two damping piston rods 501. The damping plate 4 is a square plate-shaped structure located in the left and right vertical planes. A damping spring 401 is disposed between the two damping chambers 5. The rear end of the damping spring 401 is fixedly connected to either the first or second rear side plate, and the front end of the damping plate 4 is fixedly connected to its rear end.

[0046] The airbags 6 of the two sets of shock-absorbing mechanisms inside the first mounting base 2 are respectively fixedly installed on the inner walls of the first left side plate and the first right side plate. The airbags 6 of the two sets of shock-absorbing mechanisms inside the second mounting base 3 are respectively fixedly installed on the inner walls of the second left side plate and the second right side plate. The end of the first connecting pipe away from the airbag 6 is connected to the internal space of the shock-absorbing cavity 5 at the rear end of the shock-absorbing piston rod 501.

[0047] The pressure block 702 has an L-shaped structure, and the inner side of the front end face of the pressure block 702 is a beveled structure. The moving cavities 7 of the two sets of shock-absorbing mechanisms inside the first mounting base 2 are fixedly installed on the first rear side plate, and the pressure blocks 702 of the two sets of shock-absorbing mechanisms inside the first mounting base 2 are respectively fixedly installed at the two upper corners of the first rear side plate. The moving cavities 7 of the two sets of shock-absorbing mechanisms inside the second mounting base 3 are fixedly installed on the second rear side plate, and the airbags 6 of the two sets of shock-absorbing mechanisms inside the second mounting base 3 are respectively fixedly installed at the two lower corners of the second rear side plate. One end of the second connecting pipe is connected to the internal space of the moving cavity 7 at the rear end of the pressure piston rod 701, and the other end of the second connecting pipe is connected to the internal space of the shock-absorbing cavity 5 at the rear end of the shock-absorbing piston rod 501.

[0048] Four square array of connecting blocks 101 are fixedly installed on the rear end face of the harmonic controller housing 1. The two upper connecting blocks 101 are connected to the two damping plates 4 inside the first mounting base 2 through a clamping mechanism, and the two lower connecting blocks 101 are fixedly connected to the two damping plates 4 inside the second mounting base 3.

[0049] The clamping mechanism includes a clamping block 402, an air chamber 403, a limiting piston rod 404, and a limiting spring 405. Two symmetrical sliding grooves are provided on the front end face of the damping plate 4 of the first mounting base 2. A clamping block 402 is slidably disposed inside each groove, with the front ends of the two clamping blocks 402 being far apart. A piston groove extending laterally is provided on the side end face of the two sliding grooves that are far apart. A limiting piston rod 404 is slidably disposed inside each piston groove. A limiting spring 405 is sleeved on the outer side of the two limiting piston rods 404 that are close to each other. The end of the limiting spring 405 away from the limiting piston rod 404 is fixedly connected to the clamping block 402 on the same side. An air chamber 403 is provided inside the damping plate 4 of the first mounting base 2, and the air chamber 403 is connected to the far ends of the two piston grooves.

[0050] Two vertical first sliding grooves are provided inside the first rear side plate of the first mounting base 2, and two vertical second sliding grooves are provided inside the second rear side plate of the second mounting base 3. A first exposed groove is provided at the front of the top of the first sliding groove, and a second exposed groove is provided at the front of the bottom of the second sliding groove. A vertical fixing spring 802 is fixedly installed at the top of the first sliding groove and the bottom of the second sliding groove. An L-shaped first fixing rod 8 is slidably installed inside each first sliding groove, abutting against the fixing spring 802 inside the first sliding groove. An L-shaped second fixing rod 9 is slidably installed inside each second sliding groove, abutting against the fixing spring 802 inside the second sliding groove. Both the first fixing rod 8 and the second fixing rod 9 include a vertical section and a horizontal section. The upper end of the vertical section of the first fixing rod 8 is fixedly connected to the rear end of the horizontal section. The vertical section of the first fixing rod 8 slides inside the first sliding groove. The lower end of the vertical section of the first fixing rod 8 extends to the outer side of the lower end of the first sliding groove. The horizontal section of the first fixing rod 8 extends outward from the first exposed groove. A first locking groove 801 is provided at the front end of the horizontal section of the first fixing rod 8, and the first locking groove 801 is locked with the upper end of the damping plate 4 inside the first mounting base 2. The lower end of the vertical section of the second fixing rod 9 is fixedly connected to the rear end of the horizontal section. The vertical section of the second fixing rod 9 slides inside the second sliding groove. The upper end of the vertical section of the second fixing rod 9 extends to the outer side of the upper end of the second sliding groove. The horizontal section of the second fixing rod 9 extends outward from the second exposed groove. A second locking groove is provided at the front end of the horizontal section of the second fixing rod 9, and the second locking groove is locked with the lower end of the damping plate 4 inside the second mounting base 3.

[0051] The working principle of the present invention is:

[0052] When installing the harmonic controller based on power electronic harmonic suppression technology, the first mounting base 2 is first installed securely on the surface of the special bracket inside the cabinet by passing bolts through the four mounting holes 201, thus constructing the basic support platform of the system.

[0053] Then, the two connecting blocks 101 on the lower rear end of the harmonic controller housing 1 are fixedly connected to the two damping plates 4 inside the second mounting base 3. Then, the harmonic controller housing 1 and the second mounting base 3 are slid upward together against the first mounting base 2. The upper ends of the two locking blocks 202 on the first mounting base 2 are squeezed by the second left side plate and the second right side plate of the second mounting base 3 and rotate back into the semi-circular groove. The lower ends of the two locking blocks 202 on the second mounting base 3 are squeezed by the first left side plate and the first right side plate of the first mounting base 2 and rotate back into the semi-circular groove. After the first mounting base 2 and the second mounting base 3 are connected, the locking block 202 inside the first mounting base 2 and the locking block 202 inside the second mounting base 3 combine to form a complete circular block structure. At this time, under the action of the return spring 204, the upper end of the locking block 202 inside the first mounting base 2 rotates into the semi-circular groove of the second mounting base 3, and the lower end of the locking block 202 inside the second mounting base 3 rotates into the semi-circular groove of the first mounting base 2. The locking block 202 inside the first mounting base 2 engages with the semi-circular groove of the second mounting base 3, and the locking block 202 inside the second mounting base 3 engages with the semi-circular groove of the first mounting base 2. The two locking blocks 202 interlock with each other, so that the first mounting base 2 and the second mounting base 3 are fixedly connected and cannot be automatically disengaged.

[0054] When the first mounting base 2 and the second mounting base 3 are aligned, the lower ends of the vertical sections of the two first fixing rods 8 are pressed upward by the upper end of the second rear side plate of the second mounting base 3, thereby pressing the fixing spring 802 at the top of the first sliding groove. At this time, the horizontal section of the first fixing rod 8 slides upward, causing the first snap-fit ​​groove 801 at the end of the horizontal section of the first fixing rod 8 to disengage from the upper end of the damping plate 4 inside the first mounting base 2. At this time, the damping plate 4 inside the first mounting base 2 can move freely. When the first mounting base 2 and the second mounting base 3 are aligned, the upper ends of the vertical sections of the two second fixing rods 9 are pressed downward by the lower end of the first rear side plate of the first mounting base 2, thereby pressing the fixing spring 802 at the bottom of the second sliding groove. At this time, the horizontal section of the second fixing rod 9 slides downward, causing the second snap-fit ​​groove at the end of the horizontal section of the second fixing rod 9 to disengage from the lower end of the damping plate 4 inside the second mounting base 3. At this time, the damping plate 4 inside the second mounting base 3 can move freely.

[0055] As the harmonic controller housing 1 slides upward with the second mounting base 3, the connecting block 101 on the upper rear end of the harmonic controller housing 1 gradually enters between the two clamping blocks 402 of the clamping mechanism inside the first mounting base 2. Through the rebound force of the two limiting springs 405 inside the clamping mechanism, the two clamping blocks 402 are kept close to each other, thus precisely clamping the connecting block 101 and forming a stable mechanical constraint. When the connecting block 101 and the clamping blocks 402 experience wear and uneven contact due to long-term use, the clamping block 402 on the side with greater pressure will push the corresponding limiting piston rod 404 to compress the gas in the air chamber 403. The pressure will be quickly transmitted to the limiting piston rod 404 on the other side, driving the clamping block 402 on that side to slide outward, achieving dynamic adaptive clamping of the connecting block 101. This ensures that both clamping blocks 402 are always tightly fitted with the connecting block 101, preventing increased vibration due to loose connections.

[0056] When the harmonic controller generates vibration during operation, due to the clamping of the clamping block 402 and the limiting of the movement of the damping piston rod 501 within the damping cavity 5, the harmonic controller housing 1 first laterally presses the damping plate 4 through the connecting block 101. While the damping plate 4 moves inward to press the damping spring 401, it pushes the damping piston rod 501. The gas in the damping cavity 5 forms a resistance buffer structure to protect the damping spring 401, slowing down the aging of the damping spring 401 caused by long-term load and improving the service life of the device. The gas inside the damping chamber 5 is pressurized and enters the airbag 6 through the first connecting pipe, and simultaneously enters the moving chamber 7 through the second connecting pipe. This causes the airbag 6 to inflate and press tightly against the side wall of the harmonic controller housing 1. The gas entering the moving chamber 7 pushes the pressure piston rod 701 to slide outward. The pressure piston rod 701 drives the pressure block 702 to slide outward, so that the four pressure blocks 702 are engaged at the four corners of the harmonic controller housing 1, further limiting the position of the harmonic controller housing 1 from multiple directions, thereby improving the overall service life and operational reliability of the harmonic controller.

[0057] When the harmonic controller needs to be disassembled, rotate the two rotating handles 203 to control the two locking rods 205 inside the first mounting base 2 to rotate inside the fan-shaped groove, so that the return spring 204 inside the first mounting base 2 is compressed, which drives the two locking blocks 202 inside the first mounting base 2 back into the two semi-circular grooves of the first mounting base 2. In this way, the two locking blocks 202 inside the second mounting base 3 also return into the two semi-circular grooves of the second mounting base 3, at which point the first mounting base 2 and the second mounting base 3 can be separated. During the process of disengaging the first mounting base 2 from the second mounting base 3, under the restoring force of the fixing spring 802, the first fixing rod 8 inside the first sliding groove slides downward, thereby causing the first snap-fit ​​groove 801 on the first fixing rod 8 to snap and fix the upper end of the damping plate 4 inside the first mounting base 2. The second fixing rod 9 inside the second sliding groove slides upward, thereby causing the second snap-fit ​​groove on the second fixing rod 9 to snap and fix the lower end of the damping plate 4 inside the second mounting base 3. This isolates the external force generated by the disassembly operation, avoids damage such as pulling and collision caused by the disassembly action of the staff to the damping mechanism, reduces the risk of accidental damage to the damping mechanism, extends the service life of the damping mechanism, and reduces maintenance costs.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A harmonic controller based on power electronic harmonic suppression technology, characterized in that: The system includes a first mounting base (2), on which a second mounting base (3) is slidably mounted, and a harmonic controller housing (1) is inserted into the second mounting base (3); the first mounting base (2) and the second mounting base (3) are connected by a locking mechanism; two sets of damping mechanisms are provided on the inner sides of both the first mounting base (2) and the second mounting base (3), each damping mechanism including a damping cavity (5), an airbag (6), and a moving cavity (7); a damping piston rod (501) is slidably mounted inside the damping cavity (5), and the damping piston rod (501) is slidably mounted outside the moving cavity (7). A damping plate (4) is fixedly installed on one side. A pressing piston rod (701) is slidably installed inside the moving cavity (7). A pressing block (702) is fixedly installed on the outside of the pressing piston rod (701). The damping cavity (5) is connected to the airbag (6) through the first connecting pipe. The damping cavity (5) is connected to the moving cavity (7) through the second connecting pipe. The damping plate (4) inside the first mounting base (2) is connected to the harmonic controller housing (1) through the clamping mechanism. The damping plate (4) inside the second mounting base (3) is fixedly connected to the harmonic controller housing (1). Four square array of connecting blocks (101) are fixedly installed on the rear end face of the harmonic controller housing (1). The two upper connecting blocks (101) are connected to the two damping plates (4) inside the first mounting base (2) through a clamping mechanism, and the two lower connecting blocks (101) are fixedly connected to the two damping plates (4) inside the second mounting base (3). The clamping mechanism includes a clamping block (402), an air chamber (403), a limiting piston rod (404), and a limiting spring (405). Two left-right symmetrical sliding grooves are provided on the front end face of the damping plate (4) of the first mounting base (2). A clamping block (402) is slidably arranged inside each sliding groove. A piston groove extending left and right is provided on the side end face of the two sliding grooves that are far apart from each other. A limiting piston rod (404) is slidably arranged inside each piston groove. A limiting spring (405) is sleeved on the outer side of the two limiting piston rods (404) that are close to each other. The end of the limiting spring (405) that is far away from the limiting piston rod (404) is fixedly connected to the clamping block (402) on the same side. An air chamber (403) is provided inside the damping plate (4) of the first mounting base (2). The air chamber (403) is connected to the two piston grooves that are far apart from each other.

2. A harmonic controller based on power electronic harmonic suppression technology according to claim 1, characterized in that: The first mounting base (2) includes a first rear side plate, a first left side plate, a first right side plate, and a top plate. The rear end of the top plate is fixedly connected to the upper end of the first rear side plate. The left and right ends of the top plate are fixedly connected to the upper ends of the first left side plate and the first right side plate, respectively. The left and right ends of the first rear side plate are fixedly connected to the rear ends of the first left side plate and the first right side plate, respectively. The front-to-back length of the top plate is greater than the front-to-back length of the first left side plate and the first right side plate. The height of the first rear side plate is equal to the height of the first left side plate and the first right side plate. The second mounting base (3) includes a second rear side plate, a second left side plate, a second right side plate, and a bottom plate. The second left side plate and the second right side plate each include a front half and a rear half. The bottom ends overlap, and the height of the front half is greater than the height of the back half; the left and right ends of the bottom plate are fixedly connected to the lower ends of the second left side plate and the second right side plate respectively, and the left and right ends of the second rear side plate are fixedly connected to the rear end of the second left side plate and the rear end of the second right side plate respectively; when the first mounting base (2) and the second mounting base (3) are connected, the first rear side plate overlaps with the second rear side plate, the first left side plate overlaps with the second left side plate, the first right side plate overlaps with the second right side plate, and the left and right ends of the top plate are in contact with the upper end of the front half of the second left side plate and the upper end of the front half of the second right side plate respectively. At this time, the first mounting base (2) and the second mounting base (3) are combined into a square box structure with an open front end.

3. A harmonic controller based on power electronic harmonic suppression technology according to claim 2, characterized in that: A locking mechanism is provided between the front end of the first left side plate of the first mounting base (2) and the rear end of the front half of the second left side plate of the second mounting base (3), and a locking mechanism is also provided between the front end of the first right side plate of the first mounting base (2) and the rear end of the front half of the second right side plate of the second mounting base (3); the locking mechanism includes a locking block (202) and a locking rod (205); a semi-circular groove is provided at the front end of the first left side plate and the front end of the first right side plate of the first mounting base (2), and a semi-circular groove is provided at the rear end of the front half of the second left side plate and the rear end of the front half of the second right side plate of the second mounting base (3), and a fan-shaped groove is provided at one end of the inner side of each semi-circular groove, and the semi-circular groove and the fan-shaped groove are connected; a semi-circular locking block (202) is rotatably provided inside each semi-circular groove, and a locking rod (205) is fixedly provided in the middle of the outer arc surface of each locking block (202), and the locking rod (205) is located inside the fan-shaped groove.

4. A harmonic controller based on power electronic harmonic suppression technology according to claim 3, characterized in that: The locking mechanism also includes a rotating handle (203) and a return spring (204); a return spring (204) is fixedly installed on the inner wall of the lower side of the two fan-shaped slots of the first mounting base (2), and a return spring (204) is fixedly installed on the inner wall of the upper side of the two fan-shaped slots of the second mounting base (3). The end of the return spring (204) is fixedly connected to the locking rod (205) inside the fan-shaped slot; an arc-shaped actuating groove is provided on the outer wall of the two fan-shaped slots of the first mounting base (2), and a rotating handle (203) is slidably installed inside each actuating groove. The inner end of the two rotating handles (203) is fixedly connected to the end of the two locking rods (205) inside the first mounting base (2) away from the locking block (202).

5. A harmonic controller based on power electronic harmonic suppression technology according to claim 2, characterized in that: The two damping mechanisms inside the first mounting base (2) are located at the two corners on the upper side of the first rear side plate, and the two damping mechanisms inside the second mounting base (3) are located at the two corners on the lower side of the second rear side plate; the damping mechanism also includes a damping spring (401); each damping mechanism includes two damping chambers (5), which are fitted together; the front end of the damping chamber (5) is kept open, and the rear end of the damping chamber (5) is fixedly connected to the first rear side plate or the second rear side plate; a damping piston rod (501) is slidably arranged inside each damping chamber (5), and the same damping plate (4) is fixedly arranged at one end of the outer side of the two damping piston rods (501), and a damping spring (401) is arranged between the two damping chambers (5), the rear end of the damping spring (401) is fixedly connected to the first rear side plate or the second rear side plate, and the front end of the damping spring (401) is fixedly connected to the rear end face of the damping plate (4).

6. A harmonic controller based on power electronic harmonic suppression technology according to claim 5, characterized in that: The airbags (6) of the two sets of shock-absorbing mechanisms inside the first mounting base (2) are fixedly installed on the inner walls of the first left side plate and the first right side plate, respectively. The airbags (6) of the two sets of shock-absorbing mechanisms inside the second mounting base (3) are fixedly installed on the inner walls of the second left side plate and the second right side plate, respectively. The end of the first connecting pipe away from the airbag (6) is connected to the internal space of the shock-absorbing cavity (5) at the rear end of the shock-absorbing piston rod (501).

7. A harmonic controller based on power electronic harmonic suppression technology according to claim 5, characterized in that: The pressing block (702) has an L-shaped structure. The moving cavities (7) of the two sets of shock-absorbing mechanisms inside the first mounting base (2) are fixedly installed on the first rear side plate. The pressing blocks (702) of the two sets of shock-absorbing mechanisms inside the first mounting base (2) are respectively fixedly installed at the two upper corners of the first rear side plate. The moving cavities (7) of the two sets of shock-absorbing mechanisms inside the second mounting base (3) are fixedly installed on the second rear side plate. The airbags (6) of the two sets of shock-absorbing mechanisms inside the second mounting base (3) are respectively fixedly installed at the two lower corners of the second rear side plate. One end of the second connecting pipe is connected to the internal space of the moving cavity (7) at the rear end of the pressing piston rod (701), and the other end of the second connecting pipe is connected to the internal space of the shock-absorbing cavity (5) at the rear end of the shock-absorbing piston rod (501).

8. A harmonic controller based on power electronic harmonic suppression technology according to claim 2, characterized in that: Two vertical first sliding grooves are provided inside the first rear side plate of the first mounting base (2), and two vertical second sliding grooves are provided inside the second rear side plate of the second mounting base (3). A first exposed groove is provided at the front of the top of the first sliding groove, and a second exposed groove is provided at the front of the bottom of the second sliding groove. A vertical fixing spring (802) is fixedly provided at the top of the first sliding groove and the bottom of the second sliding groove. An L-shaped first fixing rod (8) is slidably provided inside each first sliding groove, and the first fixing rod (8) abuts against the fixing spring (802) inside the first sliding groove. An L-shaped second fixing rod (9) is slidably provided inside each second sliding groove, and the second fixing rod (9) abuts against the fixing spring (802) inside the second sliding groove. Both the first fixing rod (8) and the second fixing rod (9) include a vertical section and a horizontal section. The vertical section of the first fixing rod (8) is... The upper end of the first fixed rod (8) is fixedly connected to the rear end of the horizontal section. The vertical section of the first fixed rod (8) slides inside the first sliding groove. The lower end of the vertical section of the first fixed rod (8) extends to the outer side of the lower end of the first sliding groove. The horizontal section of the first fixed rod (8) extends outward from the first exposed groove. A first snap-fit ​​groove (801) is provided at the front end of the horizontal section of the first fixed rod (8). The first snap-fit ​​groove (801) is snapped with the upper end of the damping plate (4) inside the first mounting base (2). The lower end of the vertical section of the second fixed rod (9) is fixedly connected to the rear end of the horizontal section. The vertical section of the second fixed rod (9) slides inside the second sliding groove. The upper end of the vertical section of the second fixed rod (9) extends to the outer side of the upper end of the second sliding groove. The horizontal section of the second fixed rod (9) extends outward from the second exposed groove. A second snap-fit ​​groove is provided at the front end of the horizontal section of the second fixed rod (9). The second snap-fit ​​groove is snapped with the lower end of the damping plate (4) inside the second mounting base (3).

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