Mechanical lock type rectifier voltage regulating transformer

Abstract

The present application relates to the technical field of transformer, and discloses a mechanical locking type rectification voltage regulating transformer, which comprises a shell, an iron core assembly is fixedly installed in the shell, and a winding is sleeved on the periphery of the iron core assembly, wherein the iron core assembly comprises laminations in full-skew joint structure, the laminations comprise lower yoke sheets, core column sheets and upper yoke sheets, and the core column sheets are alternately and adhesively connected with the lower yoke sheets and the upper yoke sheets.The mechanical locking type rectification voltage regulating transformer can effectively solve the problem that in the prior art, in order to facilitate subsequent winding sleeving, the lower yoke sheets and the core column sheets are assembled into a horizontal E-shaped structure in advance, and then the upper yoke sheets are assembled after the winding is sleeved, however, the iron core of the horizontal E-shaped structure is only positioned by the laminated friction force of silicon steel sheets, and displacement or loosening is prone to occur during movement, transportation and overturning, thereby affecting the overall performance of the transformer.

Description

Technical Field

[0001] This invention relates to the field of transformer technology, and specifically to a mechanically locked rectifier voltage regulating transformer. Background Technology

[0002] Rectifier voltage regulating transformers are key equipment in power systems that convert AC power into DC power, and are widely used in industrial fields such as electrolytic aluminum, electrochemicals, and DC power transmission. Among them, the core of a three-phase three-limb rectifier voltage regulating transformer generally adopts a 45-degree fully oblique joint lamination structure, with the core laminations overlapping the lower and upper yoke laminations in an alternating manner to reduce magnetic circuit gaps and reduce leakage flux loss.

[0003] In the existing technology, when assembling the core assembly, in order to facilitate the subsequent winding installation, the lower yoke laminations and core laminations are usually first assembled into a horizontal E-type structure by staggered stacking. After the winding installation is completed, the yoke laminations are then assembled. However, the core of the horizontal E-type structure relies solely on the frictional force of the stacked silicon steel sheets for positioning. During movement, transfer, and flipping, displacement or loosening is likely to occur, affecting the overall performance of the transformer. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a mechanically locked rectifier voltage regulating transformer. This effectively solves the problem in existing technologies where, during the assembly of the core assembly, to facilitate subsequent winding installation, the lower yoke laminations and core laminations are typically first assembled in an alternating E-type structure, and then the yoke laminations are installed after the windings are in place. However, the core of the horizontal E-type structure relies solely on the frictional force of the stacked silicon steel sheets for positioning, making it prone to displacement or loosening during movement, transport, and rotation, thus affecting the overall performance of the transformer.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a mechanically locked rectifier voltage regulating transformer, including a housing. An iron core assembly is fixedly installed inside the housing, and windings are sleeved around the iron core assembly. The iron core assembly includes laminations with a fully oblique joint structure. Each lamination includes a lower yoke lamination, iron core laminations, and an upper yoke lamination. Several iron core laminations are interleaved and bonded to the lower and upper yoke laminations. Three sets of iron core laminations are arranged, connected between the lower and upper yoke laminations to form a closed magnetic circuit. A lower clamping plate is provided on the outer side of the lower yoke lamination, and an upper clamping plate is provided on the outer side of the upper yoke lamination. The lower clamping plate has a locking element for clamping the iron core laminations via a mounting groove on its upper surface. The locking component includes a base that slides against the inner wall of the mounting groove. A central seat is fixedly connected to the upper surface of the base. A movable seat that slides against the upper surface of the base is provided on the outer side of the central seat. A rotating shaft is rotatably connected inside the central seat. The outer end of the rotating shaft extends into the movable seat and is rotatably connected to the inside of the movable seat. A clamping plate is sleeved on the outer circumferential surface of the rotating shaft.

[0006] Furthermore, there are two lower clamping plates and two upper clamping plates symmetrically arranged around the stacked pieces. The two lower clamping plates and the two upper clamping plates are connected by connecting rods, and the lower clamping plates and the upper clamping plates are connected by pull screws.

[0007] Furthermore, a keyway is provided on the outer circumferential surface of the rotating shaft, a convex key is provided on the inner circumferential wall of the clamping plate to fit against the inner wall of the keyway, and a rubber layer is provided on the inner side of the clamping plate to fit against the side of the iron core plate.

[0008] Furthermore, the interior of the movable seat is provided with an insert groove for accommodating the clamping plate, and two movable seats are slidably connected to the upper surface of each base, with the two movable seats symmetrically distributed on both sides of the central seat.

[0009] Furthermore, the central seat is slidably connected to a vertical rod through a movable cavity opened inside it. The bottom of the vertical rod is hinged to a rotating rod, the outer end of which is hinged to the interior of the movable seat. The top of the vertical rod passes through the central seat and is fixedly connected to a pressure plate.

[0010] Furthermore, a gear groove is provided in the middle of the rotating shaft, a toothed groove is provided inside the vertical rod, and a spring is provided at the bottom end of the vertical rod to connect with the bottom of the inner wall of the movable cavity.

[0011] Furthermore, an L-shaped rod is fixedly connected to the outer surface of the vertical rod, and a groove that fits into the outer circumference of the L-shaped rod is provided inside the rotating shaft.

[0012] Furthermore, a central block slides vertically inside the base, and a rotating rod is hinged to the outer surface of the central block. A limiting groove communicating with the inside of the mounting slot is opened inside the lower clamping plate. A limiting rod that slides horizontally inside the base is hinged to the outer end of the rotating rod. The inner wall of the limiting groove is a groove that fits against the outer end of the limiting rod. A compression spring connected to the inside of the base is provided on the lower surface of the central block. A connecting rod is fixedly connected to the bottom end of the vertical rod, and the lower surface of the connecting rod is parallel to the upper surface of the central block.

[0013] The technical solution provided by this invention has the following advantages compared with the prior art: 1. In existing technologies, when the iron core is assembled with the lower yoke and three sets of core pillars in an alternating stack, but before the upper yoke is installed, the stacked structure is a horizontal E-shaped semi-finished product. During straightening, station transfer, and posture flipping, the vertical core pillars are easily affected by slight external forces, vibrations, and bumps, resulting in radial skewing and lateral displacement. This invention addresses this by setting a locking element in the mounting groove of the lower clamping plate. After the locking element unfolds, the clamping plates on both sides rotate 90 degrees and move towards the center under the action of the moving seat, forming a symmetrical clamping around the core pillars, thus comprehensively restricting radial displacement and skewing of the core pillars. The rubber layer on the inner side of the clamping plate is tightly fitted to the side of the core pillars, restricting radial displacement and skewing of the core pillars, preventing slippage and opening of the 45-degree oblique joints of the stacked pieces. This avoids the defects of traditional iron core semi-finished products, which rely on pure friction positioning without rigid constraints, improving the accuracy of iron core stacking and the stability of assembly benchmarks, and preventing the oblique joints from opening and slipping during movement.

[0014] 2. In this invention, when the locking member unfolds and the vertical rod moves upward, it can drive two sets of actions: First, the upper teeth of the toothed groove inside the vertical rod mesh with the gear groove in the middle of the rotating shaft, driving the rotating shaft to rotate. The rotating shaft, through the cooperation of the keyway and the protruding key on the inner wall of the clamping plate, drives the clamping plate to gradually rotate, realizing the transformation of the clamping plate from a retracted state to an unfolded state perpendicular to the moving seat. Second, during the upward movement of the vertical rod, the angle between the vertical rod and the rotating rod gradually increases. The outer end of the rotating rod drives the moving seat to slide along the upper surface of the base towards the center seat, and the distance between the two moving seats gradually decreases, driving the already rotated and unfolded clamping plate to move synchronously to center and clamp the iron core column. Both of the above actions are driven simultaneously by the single upward movement of the vertical rod. First, the moving seat moves to center and simultaneously realizes the unfolding of the clamping plate. After unfolding, it continues to drive the inner side of the clamping plate to clamp the side of the iron core column, avoiding the interference problem caused by the mismatch of the two action sequences.

[0015] 3. Traditional semi-finished iron cores often use temporary pads or fixed external limiting blocks for positioning. After the iron core is transported and positioned, the limiting components must be manually removed one by one, and the binding and cleaning must be performed. This process is cumbersome, inefficient, and prone to damaging the iron core column and scratching the insulating varnish of the silicon steel sheets, potentially causing insulation problems between the sheets. Furthermore, the iron core loses its positioning constraint after disassembly, making it susceptible to secondary displacement. This invention, through its locking mechanism, automatically completes fully automatic avoidance and retraction in three stages under the weight of the winding during installation, without any manual disassembly. In the first stage, the bottom end of the winding presses against the pressure plate, and the vertical rod moves downward. At this time, the teeth of the rack groove are not engaged with the teeth of the gear groove, the rotating shaft remains locked, and the proportion of the L-shaped rod in the slot gradually decreases. The angle between the vertical rod and the rotating rod narrows, pushing the two moving seats to slide outward. The clamping plate moves outward away from the iron core plate at the same time, and the rubber layer on the inner side of the clamping plate no longer contacts the side of the iron core plate. The rubber layer regains its elasticity, and the first stage completes the release of clamping force. In the second stage, when the top of the L-shaped rod is only parallel to the bottom end of the slot, the teeth at the bottom end of the rack groove begin to engage with the gear groove, driving the rotating shaft to rotate in the opposite direction, causing the clamping plate to rotate 90 degrees in the opposite direction, so that the clamping plate retracts into the insert groove. At the same time, the distance between the two moving seats continues to increase, and the lower surface of the connecting rod at the bottom end of the vertical rod begins to fit against the upper surface of the center block, completing the preparation for force transmission. In the third stage, after the clamping plate is fully retracted into the mounting slot, the vertical rod continues to move downwards, pressing down on the center block via the connecting rod. The pressure coil undergoes elastic deformation, pulling the limit rod to retract and exit the limit slot, releasing the height lock of the base. The locking component descends to the upper surface of the center seat, the upper surface of the pressure plate, and the upper surface of the lower clamping plate, fully retracting and resetting into the mounting slot. All three stages are driven by the winding's own weight, requiring no manual disassembly. The clamping force release, clamping plate rotation and retraction, and limit release are completed automatically in sequence. The entire winding downward assembly process is free from interference from protruding obstructions, completely avoiding assembly interference problems, improving the overall assembly efficiency of the transformer, and preventing quality risks such as core bumps, insulation damage, and secondary misalignment caused by manual disassembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the separation structure of the housing, core assembly, and windings in an embodiment of the present invention; Figure 2 This is a schematic diagram of the separated structure of the core assembly and windings according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the stacked plates, lower clamping plate, upper clamping plate and locking member in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the clamping plate, iron core column, base and clamping plate in an embodiment of the present invention; Figure 5 This is a cross-sectional structural diagram of the clamping plate, base, and movable seat in an embodiment of the present invention; Figure 6 This is an embodiment of the present invention. Figure 5 A magnified structural diagram of part A in the middle; Figure 7 This is an embodiment of the present invention. Figure 5 A magnified structural diagram of section B in the middle; Figure 8 This is a schematic diagram of the locking component and the limiting rod according to an embodiment of the present invention; Figure 9 This is a cross-sectional structural diagram of the vertical rod, rack groove, rotating shaft, and gear groove according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the separated structure of the rotating shaft, clamping plate, and vertical rod in an embodiment of the present invention.

[0018] The labels in the diagram represent: 1. Shell; 2. Core assembly; 21. Laminated laminations; 211. Lower yoke lamination; 212. Core post lamination; 213. Upper yoke lamination; 22. Lower clamping plate; 221. Mounting groove; 222. Limiting groove; 23. Upper clamping plate; 24. Locking element; 241. Base; 2411. Center seat; 24111. Movable cavity; 242. Moving seat; 2421. Mounting. 243. Rotating shaft; 2431. Keyway; 2432. Gear groove; 2433. Slot; 244. Clamping plate; 245. Vertical rod; 2451. Pressing plate; 2452. Gear groove; 2453. L-shaped rod; 246. Rotating rod; 247. Spring; 25. Center block; 251. Rotating rod; 252. Limiting rod; 253. Compression spring; 254. Connecting rod; 3. Winding. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments. Example

[0021] Please see Figures 1-10 This invention provides a technical solution: a mechanically locked rectifier voltage regulating transformer, including a housing 1, a core assembly 2 fixedly installed inside the housing 1, and a winding 3 sleeved around the core assembly 2. The core assembly 2 includes laminations 21 with a fully oblique joint structure. The laminations 21 include a lower yoke lamination 211, core pillar laminations 212 and an upper yoke lamination 213. Several core pillar laminations 212 are interleaved with the lower yoke laminations 211 and the upper yoke laminations 213. Three sets of core pillar laminations 212 are arranged and connected between the lower yoke laminations 211 and the upper yoke laminations 213 to form a closed magnetic circuit. A lower clamping plate 22 is provided on the outer side of the lower yoke laminations 211 and an upper clamping plate 23 is provided on the outer side of the upper yoke laminations 213. The lower clamping plate 22 is provided with a locking member 24 for clamping the core pillar laminations 212 through an installation groove 221 on its upper surface. The locking member 24 includes a base 241 that slides against the inner wall of the mounting groove 221. A center seat 2411 is fixedly connected to the upper surface of the base 241. A movable seat 242 that slides against the upper surface of the base 241 is provided on the outer side of the center seat 2411. A rotating shaft 243 is rotatably connected inside the center seat 2411. The outer end of the rotating shaft 243 extends into the interior of the movable seat 242 and is rotatably connected to the interior of the movable seat 242. A clamping plate 244 is sleeved on the outer circumferential surface of the rotating shaft 243.

[0022] Two lower clamping plates 22 and two upper clamping plates 23 are symmetrically arranged around the lamination 21. The two lower clamping plates 22 and the two upper clamping plates 23 are connected by connecting rods and by tie rods. The outer side of each group of core laminations 212 corresponds to the locking member 24 in the mounting groove 221 of the two lower clamping plates 22. Each locking member 24 includes two clamping plates 244. Therefore, before the winding 3 is installed, the outer surface of each group of core laminations 212 is limited by four clamping plates 244.

[0023] The outer circumferential surface of the rotating shaft 243 is provided with a keyway 2431, the inner circumferential wall of the clamping plate 244 is provided with a protruding key that fits against the inner wall of the keyway 2431, and the inner side of the clamping plate 244 is provided with a rubber layer that fits against the side of the iron core column 212.

[0024] The interior of the movable seat 242 is provided with an insert groove 2421 for accommodating the clamping plate 244. Two movable seats 242 are slidably connected to the upper surface of each base 241, and the two movable seats 242 are symmetrically distributed on both sides of the central seat 2411.

[0025] The center seat 2411 is slidably connected to a vertical rod 245 through a movable cavity 24111 opened inside it. The bottom of the vertical rod 245 is hinged to a rotating rod 246. The outer end of the rotating rod 246 is hinged to the interior of the movable seat 242. The top end of the vertical rod 245 passes through the center seat 2411 and is fixedly connected to a pressure plate 2451.

[0026] A gear groove 2432 is provided in the middle of the rotating shaft 243, a toothed groove 2452 is provided inside the vertical rod 245, and a spring 247 is provided at the bottom end of the vertical rod 245 to connect with the bottom of the inner wall of the movable cavity 24111.

[0027] An L-shaped rod 2453 is fixedly connected to the outer surface of the vertical rod 245, and a groove 2433 is provided inside the rotating shaft 243 to fit the outer circumference of the L-shaped rod 2453.

[0028] A central block 25 slides vertically inside the base 241. A rotating rod 251 is hinged to the outer surface of the central block 25. A limiting groove 222 communicating with the inside of the mounting groove 221 is opened inside the lower clamping plate 22. A limiting rod 252 that slides horizontally inside the base 241 is hinged to the outer end of the rotating rod 251. The inner wall of the limiting groove 222 is a groove that fits against the outer end of the limiting rod 252. A compression spring 253 connected to the inside of the base 241 is provided on the lower surface of the central block 25. A connecting rod 254 is fixedly connected to the bottom end of the vertical rod 245. The lower surface of the connecting rod 254 is parallel to the upper surface of the central block 25.

[0029] The pre-assembly process of iron core assembly 2: When assembling the core assembly 2, a layer-by-layer staggered stacking process is adopted to complete the staggered stacking assembly of the lower yoke 211 and the three sets of core pillars 212. The upper yoke 213 is not assembled yet, so that the stacked laminations 21 present a horizontal E-shaped structure as a whole. In this state, the stacked laminations 21 are positioned only by the frictional force of the silicon steel sheets, without rigid constraints. When the core pillars 212 are subjected to external forces, they are prone to skewing and displacement, and the mitered joints are prone to opening and slipping under slight external forces. Before assembly, the locking component 24 is retracted inside the mounting groove 221. When in the retracted state, the clamping plate 244 is fully accommodated inside the mounting groove 2421 of the moving seat 242. The distance between the two moving seats 242 is relatively large. The vertical rod 245 is in a depressed state, the spring 247 is compressed, the teeth of the toothed groove 2452 are located below the gear groove 2432 in the middle of the rotating shaft 243, the top of the L-shaped rod 2453 does not enter the slot 2433, and the limiting rod 252 is retracted inside the base 241 and does not cooperate with the limiting groove 222.

[0030] After the lower yoke plate 211 and the three sets of core plates 212 are stacked, the stacked plate 21, which has a horizontal E-shaped structure, remains stationary at the workstation (at this workstation, the stacked plate 21 is placed on the tooling fixture). Two lower clamping plates 22 are removed and aligned on both sides of the lower yoke plate 211. The two lower clamping plates 22 are then fixed using connecting rods. After the lower clamping plates 22 are fixed, the locking member 24 in the internal mounting groove 221 is unfolded. The unfolding of the locking member 24 can be achieved by creating a through groove at the bottom of the lower clamping plate 22 that connects to the inside of the mounting groove 221, and then using an external tool to push out the base 241.

[0031] Using an external tool, the base 241 is pushed upward through the slot, causing it to slide vertically upward along the inner wall of the mounting groove 221, which in turn causes the locking component 24 to gradually extend out of the mounting groove 221. Initially, the clamping plate 244 remains retracted within the insert groove 2421, and the distance between the two moving seats 242 remains at its maximum. When the bottom of the clamping plate 244 is completely above the upper surface of the lower clamping plate 22, the compressed spring 247 releases its elastic potential energy, lifting the vertical rod 245 upward.

[0032] As the vertical rod 245 moves upward, the upper teeth of the rack groove 2452 gradually mesh with the outer surface of the gear groove 2432 in the middle of the rotating shaft 243. Through this meshing, the teeth of the rack groove 2452 drive the rotating shaft 243 to rotate. The rotating shaft 243, through the engagement of the keyway 2431 with the protruding key on the inner wall of the clamping plate 244, gradually causes the clamping plate 244 to begin rotating.

[0033] Meanwhile, as the vertical rod 245 moves upward, the angle between the vertical rod 245 and the rotating rod 246 gradually increases. The outer end of the rotating rod 246 drives the movable seat 242, which is hinged to it, to slide along the upper surface of the base 241 towards the central seat 2411, and the distance between the two movable seats 242 gradually decreases. During this process, the inner rubber layer of the clamping plate 244 gradually approaches the side wall of the iron core column 212 until the teeth of the gear groove 2452 completely pass over the gear groove 2432. The clamping plate 244 rotates ninety degrees as a whole, and the clamping plate 244 is perpendicular to the movable seat 242. At this time, the axis of the slot 2433 is in a vertical state, and the inner surface of the clamping plate 244 is parallel to the side of the iron core column 212.

[0034] After the clamping plate 244 rotates into position, the vertical rod 245 continues to rise under the action of the spring 247, causing the top of the L-shaped rod 2453 on the outer side of the vertical rod 245 to enter the bottom of the slot 2433 of the rotating shaft 243, locking the angle of the rotating shaft 243, and thus locking the clamping plate 244 in a state perpendicular to the base 241, preventing the clamping plate 244 from rotating and ensuring long-term stability of the clamping posture. As the vertical rod 245 continues to move upward, the angle between the vertical rod 245 and the rotating rod 246 continues to increase, further pulling the two moving seats 242 inward, thereby driving the clamping plates 244 in the vertical state on both sides to move synchronously to the center. The distance between the two clamping plates 244 on both sides gradually decreases, clamping the iron core plate 212, restricting the radial displacement and skew of the iron core plate 212, and preventing the slippage and opening of the 45-degree oblique joint of the silicon steel sheet. The rubber layer on the inner side of the clamping plate 244 is in close contact with the side of the iron core column 212. While providing a stable clamping force, the elastic deformation of the rubber layer can compensate for the slight fluctuations in the clamping force and ensure the uniformity of clamping.

[0035] When the base 241 is raised to its maximum stroke position, the compressed spring 253 releases its elastic potential energy, pushing the center block 25 upwards and causing it to vertically displace. This causes the rotating rods 251 on both sides to open outwards, pushing the limiting rod 252 to slide horizontally outwards along the base 241. The outer end of the limiting rod 252 is precisely embedded in the limiting groove 222 of the lower clamping plate 22. The groove-like structure on the inner wall of the limiting groove 222 fits against the outer end of the limiting rod 252, fixing the height of the base 241 and thus completing the self-locking of the locking member 24 in its unfolded state. At this point, the locking member 24 is fully unfolded, and the clamping plate 244 is perpendicular to the base 241 and tightly fitted against the side of the iron core plate 212, forming a stable clamping and locking mechanism for the iron core plate 212.

[0036] When the locking member 24 is in the unfolded state and locks the core column 212, the stacked laminations 21 of the horizontal E-type structure can be moved and their positions changed, facilitating further assembly of the winding 3. When the locking member 24 is in the unfolded state, the teeth of the gear groove 2452 are completely located above the gear groove 2432 in the rotating shaft 243, and the upper surface of the pressure plate 2451 is higher than the upper surface of the center seat 2411.

[0037] The installation process of winding 3 sets: After the core assembly 2 in its vertical position is positioned and locked, a winding 3 is fitted around the core laminations 212 from top to bottom. The winding 3 includes a multi-layered structure consisting of an insulating cylinder, an inner cylinder, and an outer cylinder. During the downward movement of the winding 3, its bottom end contacts and presses against the pressure plate 2451. The shape of the pressure plate 2451 can be adjusted according to the winding 3 to ensure that the bottom end of the winding 3 can stably act on the pressure plate 2451. After being subjected to force, the pressure plate 2451 drives the vertical rod 245 to move vertically downward against the elastic force of the spring 247, completing the fully automatic avoidance and reset in three stages.

[0038] In the first stage, the vertical rod 245 moves downward. During this process, the teeth of the toothed groove 2452 do not mesh with the teeth of the gear groove 2432, and the rotating shaft 243 remains locked. At the same time, the proportion of the L-shaped rod 2453 in the slot 2433 gradually decreases (the vertical section of the L-shaped rod 2453 coincides with the axis of the slot 2433). The angle between the vertical rod 245 and the rotating rod 246 decreases synchronously, pushing the two moving seats 242 to slide outward. The two clamping plates 244 move outward away from the iron core plate 212 synchronously. The rubber layer on the inner side of the clamping plate 244 no longer contacts the side of the iron core plate 212, and the rubber layer restores its elasticity.

[0039] In the second stage, when the top of the L-shaped rod 2453 is parallel only to the bottom opening of the slot 2433, the second stage begins. At this time, the bottom teeth of the gear groove 2452 begin to mesh with the outer surface of the gear groove 2432. As the vertical rod 245 continues to move downward, the gear groove 2452 inside the vertical rod 245 drives the rotating shaft 243 to rotate in the opposite direction. Through the cooperation of the keyway 2431 and the convex key, the clamping plate 244 rotates in the opposite direction by ninety degrees, causing the clamping plate 244 to retract into the insert groove 2421. During this process, the rotating rod 246 continuously pushes the two moving seats 242 to slide outward, and the distance between the two moving seats 242 gradually increases. The lower surface of the connecting rod 254 at the bottom of the vertical rod 245 begins to fit against the upper surface of the center block 25, completing the preparation for force transmission.

[0040] In the third stage, after the clamping plate 244 is fully retracted into the mounting groove 2421, the winding 3 continues to press down, causing the vertical rod 245 to move downward. Simultaneously, the connecting rod 254 presses the center block 25 to move vertically downward. The center block 25 compresses the compression spring 253, causing elastic deformation. At the same time, it drives the rotating rods 251 on both sides to retract inward, pulling the limiting rod 252 to retract horizontally inward, so that the outer end of the limiting rod 252 completely exits the limiting groove 222, releasing the height lock of the base 241. After the limiting constraint is lost, the winding 3 continues to press down on the overall locking member 24, causing the base 241 to slide downward along the inner wall of the mounting groove 221. The locking member 24 descends as a whole until the upper surface of the center seat 2411, the upper surface of the pressure plate 2451, and the upper surface of the lower clamping plate 22 are flush. The locking member 24 completely retracts and resets into the mounting groove 221. There are no protruding structures interfering with the assembly of the winding 3, and the winding 3 can be smoothly and stably installed in place.

[0041] The process of assembling the whole machine: After the winding 3 is fully assembled and fixed around the core assembly 2, the locking member 24 retracts completely without interference, allowing the upper yoke lamination 213 to be properly assembled, forming a complete closed magnetic circuit with the lower yoke lamination 211, core lamination 212, and upper yoke lamination 213. Then, the upper clamping plate 23 is installed on the outside of the upper yoke lamination 213, and the lower clamping plate 22 is connected and tightened to the upper clamping plate 23 using a pull screw, uniformly pressing and fixing the entire core lamination 21, eliminating gaps in the lamination 21, reinforcing the lap joint structure, and completing the overall reinforcement of the core assembly 2. Finally, the assembled core assembly 2 is fixedly installed inside the housing 1, completing the assembly of the entire mechanically locked rectifier voltage regulating transformer.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mechanically locked rectifier voltage regulating transformer, characterized in that, The system includes a housing (1), inside which a core assembly (2) is fixedly installed. A winding (3) is sleeved around the core assembly (2). The core assembly (2) includes laminations (21) with a fully oblique joint structure. Each lamination (21) includes a lower yoke lamination (211), core pillar laminations (212), and an upper yoke lamination (213). Several core pillar laminations (212) are connected to the lower yoke laminations (211) and the upper yoke laminations (213). Interlocking and bonded, the iron core plate (212) is connected between the lower iron yoke plate (211) and the upper iron yoke plate (213) to form a closed magnetic circuit. The lower iron yoke plate (211) is provided with a lower clamping plate (22) on its outer side, and the upper iron yoke plate (213) is provided with an upper clamping plate (23) on its outer side. The lower clamping plate (22) is provided with a locking member (24) for clamping the iron core plate (212) through a mounting groove (221) opened on its upper surface. The locking member (24) includes a base (241) that slides against the inner wall of the mounting groove (221). A center seat (2411) is fixedly connected to the upper surface of the base (241). A movable seat (242) that slides against the upper surface of the base (241) is provided on the outer side of the center seat (2411). A rotating shaft (243) is rotatably connected inside the center seat (2411). The outer end of the rotating shaft (243) extends into the movable seat (242) and is rotatably connected to the inside of the movable seat (242). A clamping plate (244) is sleeved on the outer circumferential surface of the rotating shaft (243).

2. The mechanically locked rectifier voltage regulating transformer according to claim 1, characterized in that: The lower clamping plate (22) and the upper clamping plate (23) are symmetrically arranged with the stacked piece (21) as the center. The two lower clamping plates (22) and the two upper clamping plates (23) are connected by connecting rods. The lower clamping plates (22) and the upper clamping plates (23) are connected by pull screws.

3. The mechanically locked rectifier voltage regulating transformer according to claim 1, characterized in that: The outer circumferential surface of the rotating shaft (243) is provided with a keyway (2431), the inner circumferential wall of the clamping plate (244) is provided with a convex key that fits against the inner wall of the keyway (2431), and the inner side of the clamping plate (244) is provided with a rubber layer that fits against the side of the iron core column (212).

4. A mechanically locked rectifier voltage regulating transformer according to claim 3, characterized in that: The interior of the movable seat (242) is provided with an insert groove (2421) for accommodating the clamping plate (244). Two movable seats (242) are slidably connected to the upper surface of each base (241), and the two movable seats (242) are symmetrically distributed on both sides of the central seat (2411).

5. A mechanically locked rectifier voltage regulating transformer according to claim 4, characterized in that: The central seat (2411) is slidably connected to a vertical rod (245) through a movable cavity (24111) opened inside it. The bottom of the vertical rod (245) is hinged to a rotating rod (246). The outer end of the rotating rod (246) is hinged to the interior of the movable seat (242). The top end of the vertical rod (245) passes through the central seat (2411) and is fixedly connected to a pressure plate (2451).

6. A mechanically locked rectifier voltage regulating transformer according to claim 5, characterized in that: The rotating shaft (243) has a gear groove (2432) in the middle, the vertical rod (245) has a toothed groove (2452) inside, and the bottom end of the vertical rod (245) is provided with a spring (247) connected to the bottom of the inner wall of the movable cavity (24111).

7. A mechanically locked rectifier voltage regulating transformer according to claim 6, characterized in that: An L-shaped rod (2453) is fixedly connected to the outer surface of the vertical rod (245), and a slot (2433) is provided inside the rotating shaft (243).

8. A mechanically locked rectifier voltage regulating transformer according to claim 6, characterized in that: The base (241) has a central block (25) that slides vertically inside. The outer surface of the central block (25) is hinged to a rotating rod (251). The lower clamping plate (22) has a limiting groove (222) that communicates with the inside of the mounting groove (221). The outer end of the rotating rod (251) is hinged to a limiting rod (252) that slides horizontally inside the base (241). The lower surface of the central block (25) is provided with a compression spring (253) that connects to the inside of the base (241). The bottom end of the vertical rod (245) is fixedly connected to a connecting rod (254). The lower surface of the connecting rod (254) is parallel to the upper surface of the central block (25).

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