Assembly welding clamp of swirler pressing plate and swirler floating amount control method

Abstract

The invention provides an assembling and welding clamp for a swirler pressing plate and a swirler floating amount control method. The clamp comprises a positioning pin used for being inserted into a venturi tube of a flame tube, a gasket is arranged on the positioning pin in a sleeving mode, and a screw is screwed into a first nut and arranged on the positioning pin in a sleeving mode; the knurled nut with the hole is arranged at the end part of the positioning pin in a sleeving manner; the knurled nut with the hole is screwed down to drive the first nut and the gasket to move in the axial direction of the positioning pin so as to press the swirler, and the screw is screwed down to enable the end of the screw to abut against the swirler pressing plate so as to achieve circumferential positioning of the swirler pressing plate. The problems of high repair cost and long repair period caused by the fact that the assembly of the swirler pressing plate interferes with the outer cover and the repair vehicle needs to be expanded to remove the outer cover are solved, the purpose of replacing the swirler pressing plate and related parts in the state with the outer cover is achieved, the urgent requirement for rapid repair of an engine during working can be met, the product repair quality can be guaranteed, and the production efficiency is improved. And the requirements of aircraft flight on the quality safety and reliability of the aero-engine are met.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aero-engine repair and relates to an assembly welding fixture for a vortex plate and a vortex floating amount control method. BACKGROUND

[0002] A flame tube is an important part of an aero-engine, is located in the interior of a combustion chamber of the aero-engine, is a main place for organizing combustion, has a working environment temperature as high as 2000K, and is one of components with the highest temperature load in the engine. A vortex is assembled on the head of the front end of the flame tube and is limited in a certain active range through the clamp action of the inner hole of the vortex plate, and the vortex can freely move in the range, which is the floating amount of the vortex. The main function of the vortex is to form a high-speed rotating jet flow of high-pressure gas flowing through the vortex blades, and then the high-speed rotating jet flow blows and atomizes the fuel sprayed through the oil nozzle into oil-gas mixture, the oil-gas mixture forms high-temperature gas after being ignited, and forms a low-pressure backflow area in the flame tube to stabilize the flame, in this process, the chemical energy of the fuel is converted into kinetic energy by the combustion chamber and drives the turbine to work.

[0003] In a certain type of flame tube, the inner hole of the vortex plate limiting the floating amount of the vortex is designed in a long-short shaft structure with eccentricity. In assembly, the center of the vortex plate and the center of the associated venturi are also offset in a non-central coincident manner. In the new product processing stage, in order to assemble the vortex plate to the venturi, the front, rear, left, right and angular positions of the vortex plate relative to the center of the venturi are determined by means of the three process holes on the vortex plate, and then the floating amount of the vortex is controlled. Then, according to the normal assembly and welding sequence, the vortex plate is fixed and welded, and then the outer cover and the inner cover are assembled and welded, the vortex is wrapped in a semi-closed flow channel field through the inner and outer covers, and the gas inlet side of the flame tube is formed. However, when the flame tube needs to replace and repair a certain part under the vortex plate on the head due to failure, the outer cover cannot be disassembled because it has been welded to the flame tube, and the three process holes on the vortex plate cannot be used to determine the front, rear, left, right and angular positions of the vortex plate relative to the center of the venturi due to the influence of the shielding of the outer cover, and then the floating amount of the vortex cannot be controlled. Therefore, in the repair stage, it is an urgent problem to be solved to assemble and weld the vortex plate in the state of the outer cover in reverse order and to control the floating amount of the vortex through the vortex plate. SUMMARY

[0004] In view of the problems in the prior art, the present application provides an assembly and welding fixture for a vortex plate and a vortex floating amount control method, solves the problems of high repair cost and long repair cycle caused by the need to remove the outer cover of the repair vehicle to expand the repair vehicle to remove the interference between the vortex plate assembly and the outer cover when the vortex plate is replaced during the repair of the head of the flame tube by the conventional method, achieves the purpose of quickly replacing the vortex plate and associated parts under the condition of the outer cover, meets the urgent need for quick engine repair during work, ensures the product repair quality, and meets the quality safety and reliability requirements of the aircraft flight on the aero-engine. The present application is realized by the following technical solutions: An assembly and welding fixture for a vortex plate comprises, a positioning pin, a gasket, a first nut, a screw, and a threaded hole knurled nut; The positioning pin is used to be inserted into the venturi of the flame tube to realize the positioning and centering of the venturi. The gasket is sleeved on the positioning pin, and the screw is screwed into the first nut to form a combined part, which is sleeved on the positioning pin and located above the gasket. The threaded hole knurled nut is sleeved on the end of the positioning pin and is in threaded connection with the positioning pin. Wherein, tightening the threaded hole knurled nut can drive the first nut and the gasket to move axially along the positioning pin to press the vortex, and tightening the screw can make the end of the screw tightly abut against the vortex plate to realize the circumferential positioning of the vortex plate.

[0005] Preferably, the root of the positioning pin is provided with a first outer diameter section φA matched with the inner diameter of the venturi to realize the positioning and centering of the venturi. The positioning pin is also provided with a second outer diameter section φB located above the first outer diameter section φA, and the second outer diameter section φB is used to be matched with the inner diameter of the vortex to realize the centering of the vortex.

[0006] Preferably, the second outer diameter section φB of the positioning pin is provided with a coaxial stepped pin structure at the end to axially limit the vortex sleeved.

[0007] Preferably, the end of the positioning pin is processed with external threads to be matched with the internal threads of the threaded hole knurled nut.

[0008] Preferably, the outer circumferential surface of the threaded hole knurled nut is provided with a knurled structure. The hole of the threaded hole knurled nut is a light hole, and the hole diameter is greater than the diameter of the positioning pin, so that the threaded hole knurled nut can freely move on the positioning pin until it is in contact with the first nut.

[0009] Preferably, the screw is provided with at least two, and is arranged corresponding to the area of the vortex plate which is not blocked by the flame tube outer cover.

[0010] A vortex float amount control method of an assembly welding fixture based on a vortex plate, comprising the following steps: S1: removing the old vortex plate and the main vortex; S2: inserting the positioning pin into the venturi of the flame tube, positioning with the end face of the venturi outlet end and centering with the inner profile of the venturi throat, centering with the first outer diameter section φA of the positioning pin and the inner diameter at the venturi throat; S3: sequentially sleeving the vortex and the new vortex plate to be welded into the positioning pin; S4: sleeving the gasket into the positioning pin and pressing on the vortex; S5: sleeving the first nut with the screwed screw into the positioning pin and stacking on the gasket; S6: sleeving the threaded nut with holes from the upper part into the positioning pin, tightening the threaded nut with holes, pushing the first nut by the threaded nut with holes through the engagement of the inner thread on the threaded nut with holes and the outer thread on the outer circle of the positioning pin, and the first nut pushes the gasket to press the vortex along the axis of the positioning pin, and the coaxiality of the upper and lower steps of the positioning pin makes the main vortex and the venturi keep concentric; S7: according to the preset vortex float amount range, adjusting the circumferential position of the vortex plate, so that the gap between the inner profile of the vortex plate and the outer circle of the vortex meets the preset float amount requirement, and then tightening the screw to tightly fix the vortex plate. At this time, the gap between the outer circle of the vortex and the inner hole of the vortex plate is the float amount of the vortex; S8: welding the angle welding seam of the vortex plate and the venturi to realize the fixation of the vortex plate and the control of the vortex float amount.

[0011] Preferably, in step S3, the vortex is centered by the cooperation of the inner diameter of the vortex and the second outer diameter section φB of the positioning pin.

[0012] Preferably, in step S7, the circumferential position of the vortex plate is adjusted and determined by the cooperation of the pin on the fixture and the preset process hole on the vortex plate.

[0013] Preferably, in step S7, when the screw is tightened, the area that cannot be tightly fixed due to the shielding of the outer cover is not allowed to be tightly fixed.

[0014] Compared with the prior art, the present application has the following beneficial technical effects: The method provides a clamp for assembling and welding a vortex finder pressing plate of a flame tube, which is simple in operation, fast in repair, reliable in repair quality, low in repair cost, and a method for controlling the floating amount of the vortex finder. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0016] Figure 1 Front view of the vortex finder pressing plate assembly and welding clamp; Figure 2 Structure diagram of the vortex finder pressing plate assembly and welding clamp; Figure 3 Structure diagram of the vortex finder pressing plate assembly and welding clamp; Figure 4 Top view of the head of the flame tube of the embodiment; Figure 5 Structure diagram of the vortex finder pressing plate of the embodiment; Figure 6Local diagram for controlling the floating amount of the vortex finder by using the assembly welding fixture; Figure 7 Diagram for controlling the floating amount of the vortex finder by using the assembly welding fixture; In the figure: positioning pin 1, gasket 2, first nut 3, screw 4, threaded knurled nut 5, vortex finder pressing plate 1a, vortex finder 1b, venturi 1c, sleeve 1d, head adapter 1e, outer cover 1f, flame tube wall 1g. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative work based on the embodiments in the present application belong to the scope of protection of the present application.

[0018] The purpose of the present application is to provide an assembly welding vortex finder pressing plate fixture and a method for controlling the floating amount of the vortex finder, which solves the problems of high repair cost and long repair cycle caused by the interference between the vortex finder pressing plate assembly and the outer cover when replacing the vortex finder pressing plate to repair the damage of the head of the flame tube, and the removal of the outer cover to solve the interference, realizes the purpose of quickly replacing the vortex finder pressing plate and related parts in the state of the outer cover, meets the urgent demand for quick repair of the engine under emergency working conditions, guarantees the product repair quality, and meets the demand for quality safety and reliability of the aero-engine for aircraft flight.

[0019] The assembly welding vortex finder pressing plate fixture of the present application realizes the position control of the vortex finder pressing plate, and controls the floating amount of the vortex finder by means of the fixture, specifically including: Figure 1 and Figure 2 As shown in the figures, the positioning pin 1, the gasket 2, the first nut 3, the screw 4, and the threaded knurled nut 5. The fixture takes the positioning pin 1 as the main component, and after the screw 4 is screwed into the first nut 3, the gasket 2 and the threaded knurled nut 5 are assembled onto the positioning pin 1.

[0020] The positioning pin 1 is used to be inserted into the venturi 1c of the flame tube, and the positioning pin 1 serves as the core of positioning and connection, and a set of positioning, clamping and pressing systems are formed in series by the gasket 2, the first nut 3, the screw 4 and the threaded hole knurled nut 5 attached thereto. The system connects the vortex finder, the vortex finder pressing plate and the venturi together, and establishes a precise size reference system based on the center and end face of the venturi based on the positioning pin; for realizing the positioning and centering of the venturi, the vortex finder and the pressing plate; The gasket 2 is sleeved on the positioning pin 1; the first nut 3 has a hole closely matched with the core shaft of the positioning pin 1, and threaded holes are arranged on the periphery of the end face of the first nut 3; the screw 4 serves as a pressing claw and is screwed into the first nut 3 through the threaded holes on the first nut 3 to form an assembly. The assembly is sleeved on the positioning pin 1 and located above the gasket 2; The assembly of the first nut 3 and the screw 4 creatively realizes a function: taking the first nut 3 as the body, the screw 4 grows on the body first nut 3 to form a pressing claw, which is screwed in and out, and has the function of pressing the object; when the threaded hole knurled nut 5 is tightened, it is a pressure block for transmitting pressure; when the positioning pressing plate is needed, the screw 4 is tightened to become an adjustable positioning and pressing pin. One object has two uses, which greatly simplifies the number of parts and the operation complexity of the fixture in a narrow space.

[0021] The threaded hole knurled nut 5 is sleeved on the end part of the positioning pin 1 and is in threaded connection with the positioning pin 1; Through the design of positioning and centering of the positioning pin root part inserted into the venturi, and the dual-function design of the upper part penetrating the vortex finder and the pressing plate, combined with the cooperative action of the threaded hole knurled nut driving and pressing and the screw top pressing and fixing, the vortex finder pressing plate replacement in the state of outer cover is realized, without turning the outer cover, and the problems of high cost and long cycle caused by turning the outer cover in conventional repair are completely avoided.

[0022] Taking the positioning pin as the main component to integrate the functions of positioning, centering and bearing, and through the cooperation of the threaded hole knurled nut and the screw, the vortex finder and the venturi are concentrically pressed, and the position of the pressing plate is accurately fixed, providing a stable reference for subsequent floating amount control and improving repair reliability.

[0023] Wherein, tightening the threaded hole knurled nut 5 can drive the first nut 3 and the gasket 2 to move axially along the positioning pin 1 to press the vortex finder 1b, and tightening the screw 4 can make the end part of the screw 4 tightly press the vortex finder pressing plate 1a to realize the circumferential positioning.

[0024] The root of the positioning pin 1 is provided with a first outer diameter section φA matched with the inner diameter of the venturi 1c, for realizing the positioning and centering of the assembly welding fixture; the positioning pin 1 further comprises a second outer diameter section φB above the first outer diameter section φA, which is used to match with the inner diameter of the vortex finder 1b, so as to realize the centering of the vortex finder 1b. The close matching design of the positioning pin root outer diameter φA and the venturi inner diameter φa, and the close matching design of the positioning pin upper outer diameter φB and the vortex finder inner diameter φb eliminate the positioning gap, ensure that the coaxiality error of the venturi, the positioning pin and the vortex finder is extremely small, lay a foundation for the accurate control of the vortex finder floating amount, and avoid the risk of out-of-control floating amount caused by centering deviation.

[0025] The second outer diameter section φB of the positioning pin 1 is provided with a coaxial stepped pin structure at the end, which is used to axially limit the sleeved vortex finder 1b. The coaxial stepped pin structure ensures that the vortex finder 1b can quickly and accurately reach the designed position when sleeved on the positioning pin, without the need for workers to repeatedly measure or explore, thereby improving the assembly efficiency and reducing the human operation error.

[0026] The end of the positioning pin 1 is processed with an external thread, which is used to match with the internal thread of the hole knurled nut 5. The threaded connection has self-locking property, which can ensure that the hole knurled nut 5 will not loosen due to vibration during the pressing and welding process, thereby ensuring the stability of the clamping force.

[0027] The outer circumferential surface of the hole knurled nut 5 is provided with a knurled structure; this design is convenient for manual tightening, without the need for additional tools, and is particularly suitable for operation on the assembly site.

[0028] The hole of the hole knurled nut 5 is a light hole, and the hole diameter is greater than the diameter of the positioning pin 1, so that the hole knurled nut 5 can freely move on the positioning pin 1 until it is in contact with the first nut 3.

[0029] The screw 4 is provided with at least two, and is arranged on the area of the vortex finder pressing plate 1a which is not shielded by the flame tube outer cover 1f.

[0030] An assembly welding fixture for a vortex finder pressing plate, as shown in Figure 3 and Figure 4 The cross-sectional shape of the repaired flame tube is as follows: it comprises a vortex finder pressing plate 1a, a vortex finder 1b, a venturi 1c, a sleeve 1d, a head adapter section 1e, an outer cover 1f and a flame tube wall 1g; after the venturi 1c, the sleeve 1d and the head adapter section 1e are welded as a whole, they are welded with the outer cover 1f and the flame tube wall 1g to become a flame tube.

[0031] The vortex finder pressing plate 1a is provided with a positioning pin 1, a first nut 3, a hole knurled nut 5 and a screw 4, as shown in Figure 5As shown, the vortex pressure plate in the type flame tube is a sheet metal part formed by stamping, and the part center has a special-shaped hole. The special-shaped hole is composed of upper and lower semicircles, the radii of the upper and lower semicircles are the same, and after the centers of the upper and lower semicircles are offset by the same distance in the front-back direction relative to the center, the entire special-shaped hole is distributed in an elliptical shape. On the vortex pressure plate, there are three φ2 process holes, and the position degree is φ0.3mm. When assembling the vortex pressure plate, the position of the vortex pressure plate can be determined by inserting the pin on the assembly clamp into the three φ2 process holes. For the convenience of description, A, B, C, D, E, and F are used as codes to artificially mark the positions in the circumferential direction, wherein B and E are two points on the horizontal symmetry axis passing through the center of the special-shaped hole, and A, C, D, and F are quadrant points on the four corners of the pressure plate.

[0032] The present application belongs to the field of aero-engine repair, and is also applicable to the assembly of the vortex pressure plate according to the method when the aero-engine is processed. The present application relates to a clamp for controlling the floating amount of the vortex flow in the assembly of the aero-engine, and a method for controlling the floating amount of the vortex flow by using the clamp.

[0033] As shown in Figure 6 and Figure 7 , a method for controlling the floating amount of the vortex flow is to control the assembly position of the vortex pressure plate, and then to control the activity range of the vortex flow by the constraint of the inner shape of the vortex pressure plate on the outer circle of the vortex flow, so as to control the floating amount of the vortex flow.

[0034] The control steps are as follows: S1, the weld on the vortex pressure plate is broken, and the vortex pressure plate, the main vortex flow and the like which are broken or need to be replaced on the repaired part are removed and taken out; S2, the positioning pin 1 is assembled: the positioning pin 1 is inserted into the venturi 1c in the flame tube from bottom to top, and is positioned by the end face of the outlet end of the venturi 1c and is centered by the inner shape throat profile of the venturi 1c. At this time, the root and the outer diameter φA of the positioning pin 1 are tightly matched with the outlet end face and the inner diameter φa of the venturi 1c; S3, the new vortex flow 1b and the vortex pressure plate 1a are assembled: the vortex flow 1b and the vortex pressure plate 1a are sequentially inserted into the positioning pin 1, and are centered by the outer diameter φB of the positioning pin 1, so that the inner diameter φb of the vortex flow 1b is tightly matched with the outer diameter φB of the positioning pin 1. At this time, the vortex pressure plate 1a is in a semi-limited state of activity; S4, the gasket 2 is assembled: the gasket 2 is inserted into the positioning pin 1 and pressed on the vortex flow 1a.

[0035] S5, the first nut 3 and the screw 4 are assembled: after the screw 4 is screwed into the first nut 3, the screw 4 is inserted into the positioning pin 1 together with the first nut 3; S6, install the threaded nut 5 on the positioning pin 1, and screw the threaded nut 5 into the positioning pin 1 through the thread on the threaded nut 5, so that the threaded nut 5 presses the first nut 3 and the washer 2 tightly on the vortex generator 1b; S7, adjust the position of the vortex generator pressing plate 1a: in the case that the positioning pin 1 assembles the vortex generator 1b and the venturi 1c together through the coaxial stepped pin on it, the vortex generator 1b and the venturi 1c remain in a concentric state. According to the vortex generator 1b floating amount range required by the drawing, i.e. the circumferential floating amount 1.3mm and the radial floating amount 6.36mm, considering the influence of the process hole position degree φ0.3mm on the vortex generator pressing plate 1a on the position of the vortex generator pressing plate 1a and the floating amount of the vortex generator 1b, the original drawing requirement of directly controlling the process hole position degree φ0.3mm of 3-φ2 on the vortex generator pressing plate 1a, indirectly controlling the circumferential floating amount 1.3mm and the radial floating amount 6.36mm of the vortex generator 1b, is converted into directly controlling the floating amount range of the vortex generator 1b, i.e. the circumferential gap size 1.3±0.15mm and the radial gap 6.36±0.15mm between the inner shape of the vortex generator pressing plate 1a and the outer circle φ47 of the vortex generator 1b, so as to control the front and back, left and right, and angular position of the vortex generator pressing plate 1a relative to the center of the venturi 1c. The A, B, E, F parts of the vortex generator pressing plate 1a are affected by the cage cover and shielding, and the radial gap 6.36±0.15mm cannot be actually measured due to the narrow operation space, so the radial gap is still executed according to the reference size 6.36, and only the floating amount range of the vortex generator 1b, i.e. the circumferential gap size 1.3±0.15mm between the inner shape of the vortex generator pressing plate 1a and the outer circle φ47 of the vortex generator 1b, needs to be controlled and measured. In the case that the floating amount 1.3±0.15mm of the vortex generator 1b in the B, C, D, E parts of the vortex generator pressing plate 1a is guaranteed, the relative position of the vortex generator 1b and the vortex generator pressing plate 1a has been determined, so the radial floating amount 6.36±0.15mm has been controlled and guaranteed through the circumferential floating amount 1.3±0.15mm of the vortex generator 1b in the B, C, D, E parts.

[0036] After the circumferential floating amount 1.3±0.15mm of the vortex generator 1b in the B, C, D, E parts is controlled and guaranteed, the screw 4 is screwed in to press on the vortex generator pressing plate 1a, realizing the fixation of the vortex generator pressing plate 1a. The A, B, E, F parts of the vortex generator pressing plate 1a are affected by the cage cover and shielding, and the screw 4 is not allowed to be pressed tightly due to the lack of operation space. S8, weld the vortex generator pressing plate 1a: the angular joint weld of the vortex generator pressing plate 1a and the venturi 1c is carried out by argon arc welding, realizing the welding fixation of the vortex generator pressing plate 1a, and the purpose of controlling the floating amount of the vortex generator 1b through the vortex generator pressing plate 1a.

[0037] Without expanding repair, the outer cover is disassembled by turning, and the replacement of the vortex finder and the vortex finder pressing plate is directly completed in a state with the outer cover, so that the repair cycle (the machining, assembling and welding time of the outer cover is reduced) and the repair cost are greatly shortened, the product repair quality and the product function are ensured, and the rapid repair of the flame tube is realized.

[0038] The method provides a clamp for assembling and welding a vortex finder pressing plate of a flame tube, which is simple in operation, fast in repair, reliable in repair quality and low in repair cost, and a method for controlling the floating amount of the vortex finder, solves the problem that when the reverse manufacturing stage of the repair of the flame tube is performed, the vortex finder pressing plate with damage such as fracture cannot be replaced due to the influence of the outer cover welded to the flame tube, and the problems of long repair process, long repair cycle and high repair cost caused by the repair by removing the outer cover are avoided, the assembly and welding of the vortex finder and the vortex finder pressing plate are completed by using a small and simple clamp, and the floating amount of the vortex finder is accurately controlled. Therefore, the method has the advantages of simple tool structure, small size, easy carrying, simple operation, fast repair, reliable repair quality, low repair cost, short repair cycle, and repair method not limited by repair site.

[0039] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0040] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate or imply a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0041] In the present application, unless specifically defined otherwise, the terms "mount", "connected", "connecting", "fixed", and "unfixed" shall be construed broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection, and can also be communication; can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. When an assembly is referred to as "fixed" to another assembly, it can be directly on the other assembly or there can be a middle assembly. When an assembly is referred to as "connected" to another assembly, it can be directly connected to the other assembly or there can be a middle assembly. When an assembly is referred to as "disposed" on another assembly, it can be directly disposed on the other assembly or there can be a middle assembly.

[0042] In the present application, unless specifically defined otherwise, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. "Under", "below" and "under" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0043] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "contain" indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing specific embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0045] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form; any person skilled in the art can easily implement the present application according to the drawings and the above description; however, any person skilled in the art can make some changes, modifications and equivalent changes of the above disclosed technical contents without departing from the technical solution of the present application, and the equivalent embodiments of the present application are still within the protection scope of the present application.

Claims

1. An assembly and welding fixture for an eddy current generator pressure plate, characterized in that, include, Positioning pin (1), washer (2), first nut (3), screw (4), knurled nut with hole (5); The positioning pin (1) is used to insert into the venturi tube (1c) of the flame tube to achieve the positioning and centering of the venturi tube; The washer (2) is fitted onto the positioning pin (1); the screw (4) is screwed into the first nut (3) to form an assembly, which is fitted onto the positioning pin (1) and located above the washer (2); The perforated knurled nut (5) is sleeved on the end of the positioning pin (1) and threadedly connected to the positioning pin (1); Tightening the perforated knurled nut (5) can drive the first nut (3) and washer (2) to move axially along the positioning pin (1) to press the vortex generator (1b), and tightening the screw (4) can make its end press against the vortex generator pressure plate (1a) to achieve its circumferential positioning.

2. The assembly and welding fixture for an eddy current generator pressure plate according to claim 1, characterized in that, The locating pin (1) has a first outer diameter section φA at its root that matches the inner diameter of the venturi tube (1c), which is used to position and center the venturi tube. The positioning pin (1) is also provided with a second outer diameter section φB located above the first outer diameter section φA. The second outer diameter section φB is used to cooperate with the inner diameter of the vortex generator (1b) to achieve the centering of the vortex generator (1b).

3. The assembly and welding fixture for an eddy current generator pressure plate according to claim 2, characterized in that, The second outer diameter section φB of the positioning pin (1) is provided with a coaxial stepped pin structure at the end, which is used to axially limit the inserted vortex generator (1b).

4. The assembly and welding fixture for an eddy current generator pressure plate according to claim 1, characterized in that, The end of the positioning pin (1) is machined with an external thread for engaging with the internal thread of the perforated knurled nut (5).

5. The assembly and welding fixture for an eddy current generator pressure plate according to claim 1, characterized in that, The outer circumferential surface of the perforated knurled nut (5) is provided with a knurled structure.

6. The assembly and welding fixture for an eddy current generator pressure plate according to claim 1, characterized in that, At least two screws (4) are provided, and they are provided in the area of ​​the vortex pressure plate (1a) that is not covered by the flame tube cover (1f).

7. A method for controlling the floating amount of an eddy current generator based on an assembly and welding fixture for an eddy current generator pressure plate, wherein the method is based on the assembly and welding fixture for an eddy current generator pressure plate as described in any one of claims 1-6, characterized in that... Includes the following steps: S1: Remove the old vortex pressure plate and main vortex; S2: Insert the positioning pin (1) into the venturi tube (1c) of the flame tube, position it with the end face of the outlet end of the venturi tube (1c) and center it with the outline of the inner throat of the venturi tube (1c), and center it with the first outer diameter section φA of the positioning pin (1) matching the inner diameter of the inner throat of the venturi tube (1c). S3: Insert the vortex generator (1b) and the new vortex generator plate (1a) to be welded into the positioning pin (1) in sequence. S4: Insert the washer (2) into the positioning pin (1) and press it onto the eddy current generator; S5: Insert the first nut (3) with the screw (4) into the locating pin (1) and place it on top of the washer (2); S6: Insert the perforated knurled nut (5) into the end of the positioning pin (1) from the top and tighten the perforated knurled nut (5). Through the meshing of the internal thread on the perforated knurled nut (5) with the external thread on the outer circle of the positioning pin (1), the perforated knurled nut (5) pushes the first nut (3). The first nut (3) pushes the washer (2) to press the vortex along the axis of the positioning pin (1). The coaxiality of the positioning pin (1) itself keeps the main vortex and the venturi tube concentric. S7: According to the preset floating range of the vortex (1b), adjust the circumferential position of the vortex pressure plate (1a) so that the gap between its inner surface and the outer circle of the vortex (1b) meets the preset floating range requirement, and then tighten the screw (4) to fix the vortex pressure plate (1a). S8: Weld the fillet weld between the vortex pressure plate (1a) and the venturi tube (1c) to fix the vortex pressure plate (1a) and control the floating amount of the vortex (1b).

8. The method for controlling the eddy current float of an assembly welding fixture based on an eddy current pressure plate according to claim 7, characterized in that, In step S3, the vortex generator (1b) achieves centering by engaging its inner diameter with the second outer diameter section φB of the positioning pin (1).

9. The method for controlling the eddy current float of an assembly welding fixture based on an eddy current pressure plate according to claim 7, characterized in that, In step S7, the pins on the fixture engage with the pre-set process holes on the eddy current plate (1a) to assist in adjusting and determining the circumferential position of the eddy current plate (1a).

10. The method for controlling the eddy current float of an assembly welding fixture based on an eddy current pressure plate according to claim 7, characterized in that, In step S7, when tightening the screw (4), it is permissible not to tighten it in areas that are blocked by the outer cover (1f) and cannot be tightened.

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