106 results about "Fixed capacitor" patented technology

The invention belongs to the technical field of unmanned aerial vehicle full-aviation electromagnetic detection, and particularly relates to a full-aviation frequency domain electromagnetic emission system and a control method. A broadband frequency mixing and matching circuit is connected in series between an H-bridge power inverter and an emission coil of an unmanned aerial vehicle electromagnetic emission system; the broadband mixing and matching circuit comprises a first resonance unit formed by connecting a fixed capacitor and an adjustable inductor in parallel and a second resonance unit formed by connecting a fixed capacitor and an adjustable inductor in parallel, and the first resonance unit and the second resonance unit are connected in series. The adjustable inductor is matched with the dynamic impedance of the inductive load by adjusting the inductance value, and the broadband frequency mixing and matching circuit can adjust the impedance in real time, so that the matching of different resonant frequencies is realized, and the frequency range of a matching signal can be obviously widened.

The invention discloses a special aluminum fixing capacitor for an electronic detonator with ultralow electric leakage characteristic and a preparation method thereof, the capacitor comprises a positive foil electrode, a negative foil electrode, an aluminum foil or an aluminum alloy foil coated with an oxide film on the surface, electrolytic paper and an electrolyte, and the electrolyte can be a phosphate-based electrolyte, a borate-based electrolyte or an organic electrolyte containing high-conductivity salt, and an additive, the preparation method comprises the following steps: slitting positive and negative foils and electrolytic paper, winding the positive and negative foils and the electrolytic paper to form a concentric circle, forming a repair oxide film, dipping a conductive polymer material, baking and polymerizing to form a conductive film, injecting a pouring sealant into an aluminum shell, and carrying out heat treatment to obtain the conductive aluminum shell. The formation liquid is ammonium dihydrogen phosphate, ammonium adipate or boric acid aqueous solution, and the pouring sealant is epoxy resin or polyurethane; the capacitor has an ultra-low electric leakage characteristic, is suitable for being used as a power supply energy storage element in an electronic detonator system, stabilizes power supply output and inhibits an electric leakage phenomenon.

The invention relates to the technical field of power electronics, and discloses a high-voltage aluminum electrolytic capacitor, which comprises a capacitor main body, the outer surface of the capacitor main body is fixedly connected with a cathode pin and an anode pin, the outer surface of the capacitor main body is provided with an inner concave surface, and the outer surface of the inner concave surface is clamped with a leakage-proof mechanism. A heat dissipation mechanism is clamped in the capacitor main body, a protection mechanism is fixedly connected to the outer surface of the capacitor main body, the leakage-proof mechanism is used for overall leakage prevention through a sleeve shell, independent drainage is carried out on pins, leaks are separated by using rib plates, and a gas monitor and a rubber air bag are further arranged; the heat dissipation mechanism sleeve shell prevents leakage, and meanwhile, heat dissipation fins are arranged at the top for heat dissipation; the protection mechanism elastically supports and fixes the capacitor during leakage, prevents displacement of the capacitor from damaging a circuit board, can physically separate leaks, and guarantees the stability and safety of a circuit in an omnibearing manner.

The utility model discloses a capacitor service life test clamp, and relates to the technical field of capacitor detection, the capacitor service life test clamp comprises a clamping box with one end provided with an opening, a clamping structure is arranged in the clamping box, and four corners of the upper and lower surfaces of the clamping box are fixedly connected with connecting rods. Through cooperative arrangement of the clamping box, the first clamping hole, the clamping plate, the second clamping hole, a spring and other structures, during use, the clamping plate is pushed to enable the first clamping hole and the second clamping hole to be aligned, the middle section of the capacitor penetrates through the first clamping hole and the second clamping hole, the clamping plate is loosened, the clamping plate moves under the action of the elastic force of the spring, and the capacitor is clamped. The inner walls of the first clamping hole and the second clamping hole clamp the capacitor from the two sides, the end of the capacitor is not subjected to clamping acting force, and it is avoided as much as possible that when a traditional test clamp fixes the capacitor, certain pressure is applied to the two ends of the capacitor, oxidation or falling off of a tin coating at the end of the capacitor is likely to be accelerated, weldability of the capacitor is reduced, and the service life of the capacitor is prolonged. And the reliability of the capacitor is influenced.

The invention discloses a capacitor pin positioning and cutting mechanism which comprises the components of a fixed seat which is provided with a lifting sliding rail and a lifting sliding table which can move up and down along the lifting sliding rail; the cutter plate is arranged on the lifting sliding table, the cutter plate is connected with a cutter mounting block, and the cutter mounting block is provided with a pin cutter; the cutting table is arranged at the top of the fixed seat, the cutting table is provided with a horizontal sliding rail and two groups of transverse moving sliding tables capable of moving back and forth along the horizontal sliding rail, each group of transverse moving sliding tables is provided with a connecting block, and the connecting blocks are connected with positioning blocks for aligning the capacitors; the fixing block is arranged on the cutting table and corresponds to the cutting position of the pin cutter, and the fixing block is provided with a bayonet used for fixing the capacitor; and the auxiliary block is arranged on the cutting table, is matched with the fixing block and is used for supporting the capacitor pins. Through the composite motion control of the lifting sliding table and the horizontal sliding table, the capacitors are aligned before being cut in combination with the fixing blocks and the positioning blocks of the V-shaped bayonets, and it is ensured that the lengths of the pins of all the cut capacitors are kept consistent.

The invention discloses an edge trimming mechanism for machining an aluminum capacitor shell, and relates to the technical field of aluminum capacitor shell machining. The edge trimming mechanism comprises a base, a stand column is arranged on the base, a top plate is fixed to the top end of the stand column, and an edge trimming assembly is arranged below the top plate. In the trimming assembly, a movable plate is arranged on the inner side of a lifting frame, and a structure capable of adjusting the distance between two grinding columns is arranged on the bottom face of the movable plate so as to adapt to shells of different thicknesses. An electric sliding rail and an electric sliding block on the inner side of the lifting frame drive a moving plate to horizontally move to adapt to shells with different diameters; the motor drives the screw rod to drive the lifting frame to vertically move, so that the grinding column can be clamped into the shell sections with different heights. The second motor is driven through a gear and a chain to form an acceleration gear structure to accelerate rotation of the polishing column. A rotating mechanism is further arranged on the base, the electric rotating table drives the clamped and fixed capacitor to rotate and is matched with the trimming assembly, efficient trimming and polishing of the inner side and the outer side of the tangent plane of the capacitor are achieved, and production benefits are improved.

The invention relates to a matching system capable of automatically adjusting impedance, a radio frequency system and an impedance matching method, an inverted L-shaped matching network circuit in which an inductor is connected in series with a second adjustable capacitor and a first adjustable capacitor is connected in parallel is adopted to replace a traditional impedance matcher, the number of series elements is reduced to two (the inductor and the second adjustable capacitor), and only one parallel element (the first adjustable capacitor) is adopted. The circuit complexity is remarkably reduced, the adjustable capacitor is used for replacing a fixed capacitor / inductor, dynamic impedance adjustment is achieved, and debugging redundancy caused by traditional multi-element combination is avoided; a signal acquisition unit, a signal processing unit and a signal execution unit are integrated on a main control board, a data interaction path is shortened (for example, voltage and current signals are directly converted by an analog-to-digital converter and then processed by the processing unit), communication delay in a traditional separated design is eliminated, and the processing unit calculates and generates a capacitance adjustment amount instruction. And the execution unit respectively adjusts the capacitance values of the first adjustable capacitor and the second adjustable capacitor, so that impedance matching between the radio frequency source and the load is realized.

The present disclosure relates to an electrochemical cell comprising a first separator plate, a second separator plate and a capacitor designed to store and release electrical energy. Furthermore, the present disclosure relates to an electrochemical system comprising a plurality of stacked electrochemical cells. The electrochemical system may be a fuel cell stack or an electrolyzer. The capacitor is arranged between an outer edge region of the first separator plate and an outer edge region of the second separator plate. The first separator plate has a first holding structure for holding the capacitor and / or the second separator plate has a second holding structure for holding the capacitor.

The utility model discloses an explosion-proof capacitor cover plate fastening device, which comprises a capacitor, the top surface of the capacitor is movably connected with a cover plate, the side surface of the cover plate is fixedly connected with a fixed plate, the outer surface of the fixed plate is provided with a fixed protection mechanism, and the inside of the side surface of the fixed protection mechanism is provided with a heat dissipation unit. According to the utility model, the protective cover is fixed in the case through the mounting plate and is positioned on the outer surface of the fixed capacitor, so that the capacitor can be prevented from being damaged due to collision and influencing the normal operation of the capacitor, and the heat dissipation effect on the capacitor can be enhanced by fixing the heat dissipation unit on the side surface of the fixed protective mechanism and fixing the heat dissipation unit through bolts; the service life of the capacitor is prolonged, the movable baffle is taken out from the interior of the buckle, the fixing plate on the side face of the cover plate is clamped into the interior of the back plate, the movable baffle is inserted into the interior of the buckle again, the movable baffle is fixed, and it can be guaranteed that the cover plate cannot shake through cooperation of the movable baffle and the back plate.

The utility model discloses a capacitor explosion-proof housing, which relates to the technical field of capacitor explosion-proof housings and comprises a top cover, the bottom of the top cover is fixedly connected with a spring, and the bottom of the spring is fixedly connected with a turntable. According to the utility model, the capacitor body is placed in the side plate from the upper part of the side plate, the bottom part of the capacitor body is enabled to fall above the base, the effect of limiting the bottom part of the capacitor body is achieved, and the inner side of the top cover is rotated outside the top of the side plate, so that the top cover is pressed downwards, the spring moves downwards, and the spring drives the turntable to rotate; the rotating shaft rotates relative to the limiting cylinder, the effect that rotation of the rotating disc and the top cover is not affected when the limiting cylinder moves downwards is achieved, the limiting cylinder moves to the top of the capacitor body and extrudes the capacitor body under the elastic force effect of the spring, and the effect of limiting the upper end of the capacitor body is achieved. And the effect of fixing the capacitor body in the explosion-proof shell is achieved.

The utility model discloses an infrared induction transmission device for a packaged capacitor, and relates to the technical field of capacitor appliances. One side of the upper belt wheel mechanism is provided with an adjustable belt wheel body, the adjustable belt wheel body is provided with a damping guide wheel and a pressing block mechanism, the front end of the conveying platform is provided with a conveying belt mechanism, the outer front side of the conveying belt mechanism is provided with a capacitor driving mechanism, and the right side of the conveying platform is provided with a buffer guide wheel mechanism. A capacitor winding mechanism is mounted on the right upper side of the rack, and an infrared sensing mechanism is arranged on the right side of the capacitor winding mechanism; according to the utility model, the conveying belt mechanism is used for conveying the capacitor, and the capacitor driving mechanism is used for driving the capacitor, so that the capacitor can be arranged between the upper adhesive tape and the lower adhesive tape and is convenient to fix; the fixed capacitor is wound through the capacitor winding mechanism, after winding, the wound capacitor is sensed through the infrared sensing mechanism, whether winding is in place or not can be detected conveniently, and detection is accurate.

The present invention relates to a self-tuning method and system for a quadrupole radio frequency power supply. The system comprises: a lower computer, a motor, and a resonant circuit, wherein the resonant circuit comprises a first adjustable inductor, a second adjustable inductor, a first fixed capacitor, and a second fixed capacitor, wherein the first fixed capacitor and the second fixed capacitor are connected in series to form a capacitor series branch, wherein the first adjustable inductor and the second adjustable inductor are respectively connected in series with the capacitor series branch, wherein the first adjustable inductor is connected to the first fixed capacitor in the capacitor series branch, and the second adjustable inductor is connected to the second fixed capacitor in the capacitor series branch, wherein the lower computer is connected to the motor, and the motor is connected to the first adjustable inductor and the second adjustable inductor. In view of the shortcomings of the original circuit adopting a manual tuning method to reach a resonant state, poor adjustment accuracy, and cumbersome operation, a recursive idea is adopted, and an automatic tuning algorithm is adopted to reach a resonant state, which has high efficiency, high accuracy, and simple operation; and the inductor is adjusted for tuning, thereby avoiding the use of high-precision adjustable capacitors and reducing costs.

The utility model relates to the technical field of capacitor supporting foot shearing, in particular to a supporting foot shearing device for charging pile film capacitor production, which comprises a supporting table for supporting the whole device, and a fixing mechanism for limiting and fixing a capacitor is arranged on the supporting table. One side of the fixing mechanism is provided with a shearing mechanism used for shearing a single capacitor supporting foot. By arranging the fixing mechanism, the device can fix and shear a single capacitor supporting leg, the distance between the two connecting plates is adjusted by controlling the two electric telescopic rods a, and the distance between the two adjusting plates on the same connecting plate is adjusted through the two bidirectional screws. According to the device, the multiple fixing rods are arranged, so that the sizes of the multiple fixing rods can be suitable for cylindrical capacitors of different specifications, a single capacitor is fixed and machined, meanwhile, the overall occupied area of the device is small, the device is more suitable for shearing of small-number-scale capacitor supporting feet, and loss is small.

The utility model belongs to the technical field of capacitor performance detection, and particularly relates to a capacitor voltage withstanding performance detection device, which comprises a detection shell, a clamping part for positioning a capacitor is arranged in the detection shell, a communication part fixed with a pin of the capacitor is arranged in the detection shell, and the clamping part is fixedly connected with the communication part. A detector is arranged at the lower end of the detection shell, the communication component is electrically connected with the detector through a connecting wire, a plurality of capacitors of the same specification or different specifications can be placed on the detection shell, the capacitors of different specifications are fixed through the clamping component, and the capacitors are electrically connected with the detector through the communication component and the connecting wire. The detector detects the voltage withstanding performance of the capacitor.

An embodiment of the present application provides an antenna grounding circuit, comprising a connecting end, a grounding end, a first branch and a second branch, wherein the connecting end is used to connect to the radiator of the antenna, and the grounding end is used to ground. The first branch comprises a first metal branch and a second metal branch, the first metal branch is electrically connected to the grounding end, the second metal branch is electrically connected to the grounding end, and at least a portion of the first metal branch and at least a portion of the second metal branch are arranged relative to each other to form a first capacitor. The second branch is connected in parallel with the first branch, and a first inductor is provided on the second branch. The antenna grounding circuit can not only achieve a grounding effect, but also form an equivalent capacitor structure through the first metal branch and the second metal branch, without the need to install a fixed capacitor, and the capacitance value can be easily adjusted, thereby adjusting the impedance value of the first branch. In addition, an embodiment of the present application also provides an antenna structure and a wearable device.

Fixed capacitor (10) for an electronic device of a motor vehicle, in particular a power converter (12) for the electric drive of the motor vehicle, with a case (24), a first electrode (16) provided inside the housing (24), a second electrode (18) separated from the first electrode (16) by an intermediate space (20) and cooperating with the first electrode (16) to generate an electric field inside the housing (24) and a dielectric provided in the space (20), the housing (24) has an inlet (32) communicating with the space (20) and an outlet (34) communicating with the space (20), and the dielectric is a coolant (28) of the motor vehicle, wherein at least one electrically non-conductive spacer is arranged in the space (20) to define a distance between the first electrode (16) and the second electrode (18), wherein within the space (20) a flow path for the coolant (28) leading from the inlet (32) to the outlet (34) is kept clear and in the space (20) an electrically non-conductive porous body (22) is provided to form the spacer, wherein the porous body (22) has a sponge-like structure.

The present application belongs to the technical field of electromagnetic detection, and relates to a composite impedance matching network of a controllable source electromagnetic exploration system and a design method. The composite impedance matching network comprises a topology structure of a CIMN composed of a fixed capacitor CF and an ICLC part in series, and is integrated in a transmitting system of the controllable source electromagnetic exploration system. The CIMN adopts a new combined matching method and related optimization design, improves the wideband current transmission performance in terms of compensation range and power loss, proposes a new combined matching topology structure, and illustrates the corresponding wideband matching function through mathematical derivation and analysis. In combination with the wideband transmission requirement of the controllable source electromagnetic method and the limited power supply condition, a parameter optimization scheme and a control strategy of the composite impedance matching network are designed. The CIMN can better adapt to the wide working frequency range of the CSEM transmitter, improve the matching bandwidth, and reduce the power loss.

Unit converters each comprises a capacitor, a switching element having a flat surface on one side, a P-pole connection conductor where a second terminal hole at one end for fixing an electrode corresponding to a P-pole of the switching element and a first terminal hole at the other end for fixing a terminal of the capacitor are formed, and an N-pole connection conductor where a second terminal hole at one end for fixing an electrode corresponding to a N-pole of the switching element and a first terminal hole at the other end for fixing a terminal of the capacitor are formed. The unit-converters each including the connection conductors arranged to overlap in the thickness direction with their insulation maintained make the cooling surfaces of the switching elements be opposed to each other with a cooling device therebetween.

In one embodiment, an RF impedance matching circuit is disclosed. The matching circuit includes at least one electronically variable capacitor (EVC). Each EVC includes fixed capacitors, each of the fixed capacitors having a corresponding switching circuit for switching in and out the fixed capacitor to alter a total capacitance of the EVC. Each switching circuit includes a switch operably coupled to the fixed capacitor to cause the switching in and out of the fixed capacitor. The switch includes at least one string of series-connected PIN or NIP diodes. For each string, at least one of the diodes of the string has a balancing capacitor parallel to the diode.

The utility model discloses a surface-mounted solid aluminum electrolytic capacitor, which comprises a base and a capacitor shell, a fixing seat is arranged on the top surface of the base, a capacitor core is arranged in the capacitor shell, a fixing assembly used for fixing the capacitor core is arranged in the capacitor shell and located at the bottom of the capacitor core, the fixing assembly comprises a connecting shell, and the connecting shell is connected with the base. A movable groove is formed in the connecting shell, the screw is separated from the threaded connection with the threaded groove in the surface of the positioning rod by screwing the screw, so that the top cover can be taken out from the top of the capacitor shell, the conductive column is pulled upwards, the conductive column drives the clamping block at the bottom of the capacitor core to be separated from the clamping connection with the two sets of clamping hooks, and the capacitor core can be taken out from the capacitor shell. The capacitor is simple in structure and convenient to disassemble, the problem that the whole capacitor needs to be replaced when the capacitor core is replaced is avoided, the base is welded and fixed to the circuit board, disassembly and replacement are convenient, the capacitor shell can be repeatedly used, and cost is greatly reduced.

To provide a capacitor module capable of improving heat dissipation while ensuring insulation.SOLUTION: The capacitor module 23 includes a metal case 30, capacitor elements 40, bus bars 50, a frame body 60, and a sealing body 70. The frame body 60 has a holding part interposed between the metal case 30 and the capacitor element 40 so as to hold the capacitor element 40 to which the bus bar 50 is connected. The sealing body 70 includes a material having higher thermal conductivity than the frame body 60, and seals the capacitor element 40, a part of the bus bar 50, and at least a part of the frame body 60. The holding part has a hole 64 for heat radiation. The capacitor element 40 and the bus bar 50 are thermally connected to the metal case 30 through the sealing body 70 disposed in the hole 64.SELECTED DRAWING: Figure 7

The present invention relates to a column readout circuit for a CMOS image sensor, and more specifically, to a high-speed column readout circuit for a CMOS image sensor. This circuit solves the technical problems of existing column readout circuits, such as slow signal readout speed, inability to output two-terminal voltage signals, and inability to externally adjust the output range. The present invention comprises m branches, a holding and amplifying circuit, and a multiplexer, and has a two-stage amplification function. The multiplexer is used to implement time-sharing readout of sampling signals from the m branches. The branches include a column buffer circuit and a correlated double sampling circuit. The column buffer circuit utilizes fixed capacitors, and by varying the proportional relationship between the two fixed capacitors, different amplification factors are achieved to implement first-stage amplification. The correlated double sampling circuit and the holding and amplifying circuit utilize programmable capacitors, which are combined to form a gain amplifier to implement second-stage amplification. The proportional relationship of the programmable capacitors is changed through external control, causing the amplification factor of the column readout circuit to change accordingly, thereby flexibly adjusting the output range.

1. Name of the Design Product: Terminal (Fully Encapsulated). 2. Use of the Design Product: Used to support and fix capacitors and rivet electronic detonators. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective view.

The application discloses a structure for preventing and removing ice on a fan blade, comprising a pulse electric heating structure and a super-hydrophobic interface structure, wherein the pulse electric heating structure comprises a heat insulation layer arranged on a blade base, an electrically conductive belt and a temperature sensor embedded in the heat insulation layer, and a heating layer and an encapsulation layer arranged on the heat insulation layer in sequence; the pulse electric heating structure further comprises a power supply, a fixed capacitor, a relay and a temperature controller; the super-hydrophobic interface structure comprises a double-scale array structure arranged on the encapsulation layer, the double-scale array structure comprises a surface micrometer array structure and a surface nanometer array structure, a deposition strengthening structure is arranged on the double-scale array structure, and a chemical group is grafted on the deposition strengthening structure. The application can delay the icing time, shorten the ice melting time, significantly prolong the icing time of the fan blade in winter, reduce the shutdown loss, and can be widely applied to the prevention and removal of ice on the fan blade in winter.

The article is an electronic component module with a built-in capacitor. The capacitor can be easily accommodated and fixed using the capacitor accommodating wall and capacitor accommodating protrusions of the part for which the design registration is sought.

Single-chip solutions and associated methods that lead to significantly higher capacitance densities than are achievable with current on-chip solutions and that reduce the footprint of a mounting structure. Embodiments of the present invention use vertical stacking to attach one or more discrete embeddable capacitors to an IC chip superstructure or base structure and to establish electrical connections between the discrete embeddable capacitors and the IC chip, either sequentially or simultaneously. The methods according to the invention are compatible with CMOS fabrication temperatures for the IC chip, while allowing the use of capacitors fabricated by other methods that may require significantly higher temperatures. The methods according to the invention enable the connection of relatively large capacitances (e.g.,~0.5 µF - 1 µF) to an IC chip without increasing the two-dimensional area requirement of the IC chip. Some embodiments include reconfigurable discrete / fixed capacitors and / or discrete / fixed capacitors with vias (as opposed to capacitor electrode terminals) for connecting circuits.

An absence of voltage indicator has an isolation circuit, an FM modulator attached to the isolation circuit, a reference oscillator, and a mixer attached to the reference oscillator and the FM modulator, wherein the output of the mixer is the difference of the two signals. In one embodiment, the FM modulator includes a variable capacitor which varies in response to a voltage in parallel to a fixed capacitor and an inductor in parallel to the capacitors.

The utility model discloses a capacitor mounting base plate, which is used for mounting a capacitor and comprises a base plate main body, a plurality of supporting arms are arranged on the periphery of the inner surface of the base plate main body in a vertical extending manner, and a cavity for mounting the capacitor is defined by the inner sides of the plurality of supporting arms; an open groove penetrating through the inner surface of the seat plate main body and the outer surface of the seat plate main body is formed in the seat plate main body; a terminal guide groove is formed in the outer surface of the seat plate main body; and a terminal welding placement groove connected with the terminal guide groove is formed in the bottom surface of the seat plate main body and is used for placing a welding end of a capacitor leading-out terminal. According to the capacitor mounting base plate, the capacitor can be stably and firmly mounted and fixed on the circuit board, so that the capacitor mounting base plate can adapt to various complicated application environments with bumpiness and vibration.

PROBLEM TO BE SOLVED: To easily perform the regulating work of resonance frequency at a low cost by mounting a socket or connector on a coil conductor, and attachably and detachably mounting a capacitor board having a capacitor thereon on the socket or connector.SOLUTION: An RF coil for MRI 100 comprises to coil conductor 1 having the fixed capacitor 2, and the socket 3 provided on a part of the coil conductor 1. The capacitor board 10 having a fixed capacitor 11 thereon is mounted on the coil conductor 1 attachable to and detachable from the socket 3. The used fixed capacitor 2 shares the fixed portion of the resonance frequency, and the fixed capacitor 11 is provided in order to share the variable portion of the resonance frequency, The socket 3 has a number of pins raised thereon, and the pins are inserted to a number of holes of the capacitor board 10. whereby the coil conductor 1 is electrically connected to the capacitor 11.

The utility model belongs to the technical field of power capacitors, and particularly relates to a power capacitor with high safety performance, which comprises a capacitor main body, and is characterized by further comprising a fixing mechanism which is arranged at the bottom of the capacitor main body and used for fixing the capacitor main body, and the fixing mechanism comprises a positioning plate of which one end is rotatably provided with a screw rod; a first through hole for the screw rod to penetrate through is formed in one end, close to the positioning plate, of the adjusting plate; the replaceable part is arranged on the adjusting plate, a threaded hole matched with the screw rod is formed in the center of the replaceable part, and the threaded hole communicates with the first through hole; the positioning plate and the adjusting plate are respectively provided with an arc-shaped groove matched with the capacitor body. The replaceable part has the beneficial effects that only the replaceable part can be replaced when the thread is worn, and the whole adjusting plate does not need to be replaced, so that the maintenance process is simplified, and the cost is reduced.