Blind installation auxiliary alignment tool and installation method

Abstract

The invention relates to a blind installation auxiliary alignment tool and an installation method. The blind installation auxiliary alignment tool comprises a simulation seat, the simulation seat comprises a first installation seat and a plurality of supporting plates, an installation ring is formed at the top of the first installation seat, a simulation limiting groove is formed in the top of the installation ring and matched with an anti-rotation boss structure, and the supporting plates are perpendicularly arranged on the first installation seat. A simulation anti-rotation groove is formed in the top of the supporting plate; the positioning seat comprises a second mounting seat, an adapter threaded pipe, a clamping assembly and a plurality of positioning columns, the adapter threaded pipe is vertically arranged on the second mounting seat, the clamping assembly is arranged on the periphery of the second mounting seat, the top of each positioning column extends outwards to form a positioning tooth, and the positioning teeth are matched with the simulation limiting grooves. The invention provides a blind installation auxiliary alignment tool and an installation method. A breather pipe front support can be accurately installed in a low-pressure turbine shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine assembly, and particularly relates to a blind assembly alignment tool and an installation method. Background Art

[0002] Figure 1 The structural schematic diagram of a prior art low-pressure turbine shaft is shown. Figure 2 The three-dimensional view of a prior art low-pressure turbine shaft and a front support of a ventilation pipe is shown. Figure 3 The partial schematic diagram of a prior art low-pressure turbine shaft is shown. As shown in the figure, the front support 102 of the ventilation pipe in the cavity of the low-pressure turbine shaft 101 is used to support the axial ventilation pipe 103 from the front end. The front support 102 of the ventilation pipe and the low-pressure turbine shaft 101 adopt a small clearance fit. However, to prevent air leakage, the front end of the front support 102 of the ventilation pipe is sealed with a rubber ring 104. Due to the existence of the rubber ring 104, there is a large tightness between the front support 102 of the ventilation pipe and the hole of the low-pressure turbine shaft 101. The low-pressure turbine shaft 101 belongs to a rotor part. The anti-rotation boss 105 is provided on the front support 102 of the ventilation pipe and is matched with the limit groove 106 in the inner cavity of the shaft hole of the low-pressure turbine shaft 101, which can effectively prevent the relative rotation between the front support 102 of the ventilation pipe and the low-pressure turbine shaft 101 during the working process.

[0003] For the assembly of the front support 102 of the ventilation pipe, two preconditions need to be overcome:

[0004] 1) Align the anti-rotation boss 105 on the front support 102 of the ventilation pipe with the limit groove 106 in the inner cavity of the shaft hole of the low-pressure turbine shaft 101;

[0005] 2) Overcome the frictional force generated by the interference fit between the rubber ring 104 and the inner hole wall of the low-pressure turbine shaft 101.

[0006] The front support 102 of the ventilation pipe is located in the shaft hole of the low-pressure turbine shaft 101, and it is completely invisible during the installation process, belonging to blind assembly. Usually, the method of drawing lines is used to align the anti-rotation boss 105 on the front support 102 of the ventilation pipe with the limit groove 106 in the inner cavity of the shaft hole of the low-pressure turbine shaft 101. However, due to the large interference force between the rubber ring 104 and the inner hole wall of the low-pressure turbine shaft 101, the method of drawing line assembly can only ensure that the anti-rotation boss 105 of the front support and the limit groove 106 in the inner cavity of the shaft hole of the low-pressure turbine shaft 101 are aligned in the initial placement state. During the actual assembly, due to the large frictional force during assembly, it is very difficult to ensure the linear movement of the front support 102 of the ventilation pipe during the pushing process (that is, the front support 102 of the ventilation pipe will deflect during assembly), resulting in the misalignment of the anti-rotation boss 105 and the limit groove 106. The misalignment problem cannot be recognized during the blind assembly process. Forcing the assembly in this state will cause damage to the parts, and further affect the safe operation of the low-pressure turbine. Summary of the Invention

[0007] In view of the above problems of the prior art, the present invention proposes a blind installation auxiliary alignment tool and an installation method, which can accurately install the front support of the ventilation pipe into the low-pressure turbine shaft.

[0008] Specifically, the present invention proposes a blind installation auxiliary alignment tool, which is suitable for installing the front support of the ventilation pipe into the inner cavity of the low-pressure turbine shaft. An anti-rotation boss is provided around the front support of the ventilation pipe, and an anti-rotation groove is provided at the end of the low-pressure turbine shaft. A limiting groove is formed on the inner wall of the low-pressure turbine shaft, and the anti-rotation boss is structurally matched with the limiting groove; the blind installation auxiliary alignment tool includes:

[0009] A simulation seat, including a first mounting seat and multiple support plates. An installation ring is formed on the top of the first mounting seat, and a simulation limiting groove is provided on the top of the installation ring. The simulation limiting groove is structurally matched with the anti-rotation boss. Multiple support plates are vertically arranged on the first mounting seat and are arranged outside the installation ring. A simulation anti-rotation groove is provided on the top of the support plate; wherein, the axial position relationship between the simulation limiting groove and the simulation anti-rotation groove corresponds to the axial position relationship between the limiting groove and the anti-rotation groove of the low-pressure turbine shaft.

[0010] A positioning seat, including a second mounting seat, a transfer threaded pipe, a clamping assembly and multiple positioning columns. The transfer threaded pipe is vertically arranged on the second mounting seat. The clamping assembly is arranged around the second mounting seat and is used to clamp or loosen the end of the front support of the ventilation pipe. The positioning columns are vertically arranged on the second mounting seat, and a positioning tooth extends outward at the top of the positioning column. The positioning tooth is matched with the simulation limiting groove.

[0011] According to an embodiment of the present invention, the clamping assembly includes a stud, a nut and a hook plate. The stud passes through the second mounting seat, and the nut is threadedly fixed with the stud. The hook plate is arranged at the bottom of the stud, and the hook plate and the nut are arranged at both ends of the stud;

[0012] Rotate the nut so that the free end of the hook plate turns to the inside or outside of the second mounting seat.

[0013] According to an embodiment of the present invention, the bottom of the second mounting seat is attached to the top of the front support of the ventilation pipe. Rotate the nut. When the free end of the hook plate turns to the outside of the second mounting seat, the hook plate cooperates with the inner wall of the end of the front support of the ventilation pipe to fix the positioning seat on the front support of the ventilation pipe; when the free end of the hook plate turns to the inside of the second mounting seat, the hook plate disengages from the inner wall of the end of the front support of the ventilation pipe to disengage the positioning seat from the front support of the ventilation pipe.

[0014] According to an embodiment of the present invention, the blind installation auxiliary alignment tool further includes a force application component, which includes a force application seat and a screw rod rotatably matched with the force application seat. The force application seat is adapted to be fixed at the end of the low-pressure turbine shaft, and the screw rod is in threaded cooperation with the adapter threaded pipe. Rotating the screw rod causes the positioning seat to drive the front support of the ventilation pipe into the inner cavity of the low-pressure turbine shaft.

[0015] According to an embodiment of the present invention, an internal thread is formed on the force application seat, and an external thread is provided at the end of the low-pressure turbine shaft. The internal thread and the external thread are in threaded cooperation and fixed, so that the force application component is fixed at the end of the low-pressure turbine shaft.

[0016] According to an embodiment of the present invention, the number of the positioning columns is the same as that of the support plates.

[0017] The present invention also provides an installation method for the front support of the ventilation pipe, which uses the aforementioned blind installation auxiliary alignment tool. The installation method includes the following steps:

[0018] S1, Place the front support of the ventilation pipe on the simulation seat, so that the anti-rotation boss is clamped in the simulation limit groove;

[0019] S2, Install the positioning seat on the top of the front support of the ventilation pipe, so that the bottom of the second installation seat fits the top of the front support of the ventilation pipe, and the positioning teeth fall into the simulation anti-rotation groove. Fix the positioning seat on the front support of the ventilation pipe through the clamping component;

[0020] S3, Separate the positioning seat and the front support of the ventilation pipe from the simulation seat and place them into the through hole of the low-pressure turbine shaft, so that the positioning teeth on the positioning seat are engaged with the anti-rotation groove of the low-pressure turbine shaft;

[0021] S4, Press the positioning seat and the front support of the ventilation pipe into the inner cavity of the low-pressure turbine shaft through the force application component, so that the anti-rotation boss is engaged with the limit groove;

[0022] S5, Remove the force application component, and separate the positioning seat from the front support of the ventilation pipe through the clamping component and remove the positioning seat.

[0023] , The clamping component includes a stud, a nut and a hook plate. The stud passes through the second installation seat, the nut is threadedly fixed with the stud, the hook plate is arranged at the bottom of the stud, and the hook plate and the nut are arranged at both ends of the stud;

[0024] In step S2, the bottom of the second mounting seat fits against the top of the front support of the ventilation pipe. Rotate the nut. When the free end of the hook plate turns to the outside of the second mounting seat, the hook plate cooperates with the inner wall of the end of the front support of the ventilation pipe, so that the positioning seat is fixed on the front support of the ventilation pipe.

[0025] In step S5, when the free end of the hook plate turns to the inside of the second mounting seat, the hook plate disengages from the inner wall of the end of the front support of the ventilation pipe, so that the positioning seat is separated from the front support of the ventilation pipe.

[0026] According to an embodiment of the present invention, the force application assembly includes a force application seat and a screw rod rotatably engaged with the force application seat.

[0027] In step S4, fix the force application seat at the end of the low-pressure turbine shaft. The screw rod is in threaded engagement with the adapter threaded pipe. Rotate the screw rod so that the positioning seat drives the front support of the ventilation pipe into the inner cavity of the low-pressure turbine shaft.

[0028] A blind mounting auxiliary alignment tool and an installation method provided by the present invention can align the anti-rotation boss on the front support of the ventilation pipe with the limit groove in the inner cavity of the shaft hole of the low-pressure turbine shaft in a blind mounting state, and provide the thrust required for the assembly of the front support of the ventilation pipe, meet the precise positioning and assembly of the front support of the ventilation pipe, avoid part damage, and effectively improve the assembly quality.

[0029] It should be understood that the above general description and the following detailed description of the present invention are both exemplary and explanatory, and are intended to provide further explanation of the present invention described. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are provided to further understand the present invention. They are incorporated into and constitute a part of this application. The drawings show embodiments of the present invention and, together with this specification, serve to explain the principles of the present invention.

[0031] In the drawings:

[0032] Figure 1 Shows a schematic structural diagram of a low-pressure turbine shaft of the prior art.

[0033] Figure 2 Shows a perspective view of a low-pressure turbine shaft and a front support of a ventilation pipe of the prior art.

[0034] Figure 3 Shows a partial schematic view of a low-pressure turbine shaft of the prior art.

[0035] Figure 4 Shows a schematic structural diagram of a blind mounting auxiliary alignment tool according to an embodiment of the present invention.

[0036] Figure 5 Shows the assembly schematic diagram of the blind installation auxiliary alignment tool according to an embodiment of the present invention.

[0037] Figure 6 Shows the assembly schematic diagram of pressing the front support of the ventilation pipe into the low-pressure turbine shaft through the positioning seat according to an embodiment of the present invention.

[0038] Figure 7 Is Figure 6 The A-A cross-sectional view of pressing the front support of the ventilation pipe into the low-pressure turbine shaft through the positioning seat in

[0039] Figure 8 Is Figure 6 The B-B cross-sectional view of pressing the front support of the ventilation pipe into the low-pressure turbine shaft through the positioning seat in

[0040] Figure 9 Shows the flow block diagram of the installation method of the front support of the ventilation pipe according to an embodiment of the present invention. Among them, the above-mentioned drawings include the following reference numerals:

[0041] Low-pressure turbine shaft 101

[0042] Front support of ventilation pipe 102

[0043] Axial ventilation pipe 103

[0044] Rubber ring 104

[0045] Anti-rotation boss 105

[0046] Limit groove 106

[0047] Anti-rotation groove 107

[0048] Simulation seat 200

[0049] Positioning seat 201

[0050] First mounting seat 202

[0051] Support plate 203

[0052] Mounting ring 204

[0053] Simulation limit groove 205

[0054] Simulation anti-rotation groove 206

[0055] Second mounting seat 207

[0056] Adapter threaded pipe 208

[0057] Clamping assembly 209

[0058] Positioning column 210

[0059] Positioning tooth 211

[0060] Stud 212

[0061] Nut 213

[0062] Hook plate 214

[0063] Force application component 215

[0064] Force application seat 216

[0065] Screw rod 217 Specific implementation manner

[0066] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0067] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0068] It should be noted that the terms used here are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0069] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0070] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description. Without contrary instructions, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0071] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways, rotated 90 degrees or in other orientations, and corresponding interpretations are made for the spatial relative descriptions used here.

[0072] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statements, the above words have no special meanings. Therefore, it should not be construed as a limitation on the protection scope of the present application. In addition, although the terms used in the present application are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the description herein. In addition, it is required to understand the present application not only through the actual terms used, but also through the meanings implied by each term.

[0073] Figure 4 The structural schematic diagram of the blind installation auxiliary alignment tool according to an embodiment of the present invention is shown. Figure 5 The assembly schematic diagram of the blind installation auxiliary alignment tool according to an embodiment of the present invention is shown. As shown in the figure, a blind installation auxiliary alignment tool is applicable to installing the front support 102 of the ventilation pipe into the inner cavity of the low-pressure turbine shaft 101. Combining Figure 1 and Figure 2As shown in the figure, an anti-rotation boss 105 is provided around the front support 102 of the ventilation pipe. An anti-rotation groove 107 is provided at the end of the low-pressure turbine shaft 101, and a limit groove 106 is formed on the inner wall of the low-pressure turbine shaft 101. The anti-rotation boss 105 is structurally matched with the limit groove 106. The blind installation auxiliary alignment tool mainly includes a simulation seat 200 and a positioning seat 201.

[0074] Among them, the simulation seat 200 includes a first mounting seat 202 and multiple support plates 203. An installation ring 204 is formed on the top of the first mounting seat 202, and a simulation limit groove 205 is provided on the top of the installation ring 204. The simulation limit groove 205 is used to simulate the limit groove 106 inside the low-pressure turbine shaft 101, and it is structurally matched with the anti-rotation boss 105. The multiple support plates 203 are vertically arranged on the first mounting seat 202 and are arranged around the installation ring 204. A simulation anti-rotation groove 206 is provided on the top of the support plate 203, which is used to simulate the anti-rotation groove 107 at the end of the low-pressure turbine shaft 101. Among them, the axial position relationship between the simulation limit groove 205 and the simulation anti-rotation groove 206 corresponds to the axial position relationship between the limit groove 106 and the anti-rotation groove 107 of the low-pressure turbine shaft 101.

[0075] The positioning seat 201 includes a second mounting seat 207, a transition threaded pipe 208, a clamping assembly 209, and multiple positioning posts 210. The transition threaded pipe 208 is vertically arranged on the second mounting seat 207. The clamping assembly 209 is arranged around the second mounting seat 207 and is used to clamp or loosen the end of the front support 102 of the ventilation pipe. The positioning posts 210 are vertically arranged on the second mounting seat 207. A positioning tooth 211 extends outward from the top of the positioning post 210, and the positioning tooth 211 is matched with the simulation limit groove 205.

[0076] It should be noted that the simulation seat 200 is used to simulate the low-pressure turbine shaft 101, so that the positioning seat 201 can be accurately installed on the front support 102 of the ventilation pipe through the simulation seat 200. During the actual installation process, the simulation seat 200 is removed, and the front support 102 of the ventilation pipe and the positioning seat 201 that are connected and fixed as a whole are installed into the low-pressure turbine shaft 101, which will be described in detail later.

[0077] Reference Figure 4 , the clamping assembly 209 includes a stud 212, a nut 213, and a hook plate 214. The stud 212 passes through the second mounting seat 207, the nut 213 is threadedly fixed with the stud 212, and the hook plate 214 is arranged at the bottom of the stud 212. The hook plate 214 and the nut 213 are arranged at both ends of the stud 212 and are located on both sides of the second mounting seat 207 respectively. Rotate the nut 213 so that the free end of the hook plate 214 turns to the inside or outside of the second mounting seat 207.

[0078] Preferably, the bottom of the second mounting seat 207 is in contact with the top of the front support 102 of the ventilation pipe. Rotate the nut 213. When the free end of the hook plate 214 turns to the outside of the second mounting seat 207, the hook plate 214 cooperates with the inner wall (flange table) of the end of the front support 102 of the ventilation pipe, so that the positioning seat 201 is fixed on the front support 102 of the ventilation pipe. When the free end of the hook plate 214 turns to the inside of the second mounting seat 207, the hook plate 214 disengages from the inner wall of the end of the front support 102 of the ventilation pipe, so that the positioning seat 201 is disengaged from the front support 102 of the ventilation pipe.

[0079] Figure 6 Fig. shows an assembly schematic diagram of pressing the front support of the ventilation pipe into the low-pressure turbine shaft through the positioning seat according to an embodiment of the present invention. Figure 7 is Figure 6 The A-A sectional view of pressing the front support of the ventilation pipe into the low-pressure turbine shaft through the positioning seat in. Figure 8 is Figure 6 The B-B sectional view of pressing the front support of the ventilation pipe into the low-pressure turbine shaft through the positioning seat in. As shown in the figure, preferably, the blind installation auxiliary alignment tool further includes a force application assembly 215. The force application assembly 215 includes a force application seat 216 and a screw rod 217 rotatably engaged with the force application seat 216. The force application seat 216 is adapted to be fixed to the end of the low-pressure turbine shaft 101, and the screw rod 217 is threadedly engaged with the transfer threaded pipe 208 of the positioning seat 201. Rotate the screw rod 217 so that the positioning seat 201 drives the front support 102 of the ventilation pipe into the inner cavity of the low-pressure turbine shaft 101.

[0080] Preferably, an internal thread is formed on the force application seat 216. An external thread is provided at the end of the low-pressure turbine shaft 101. The internal thread and the external thread are threadedly engaged and fixed, so that the force application assembly 215 is fixed to the end of the low-pressure turbine shaft 101.

[0081] Preferably, the number of the positioning posts 210 of the positioning seat 201 is the same as that of the support plates 203 of the simulation seat 200, so that the positioning teeth 211 on the positioning posts 210 correspond to the simulation anti-rotation grooves 206 on the support plates 203 one by one.

[0082] Figure 9 Fig. shows a flow block diagram of the installation method of the front support of the ventilation pipe according to an embodiment of the present invention. As shown in the figure, the present invention also provides an installation method for the front support 102 of the ventilation pipe. By using the aforementioned blind installation auxiliary alignment tool, the front support 102 of the ventilation pipe can be accurately installed into the low-pressure turbine shaft 101 in a blind installation state. Combining Figures 4 - 8 , the installation method includes the steps:

[0083] S1, Place the front support 102 of the ventilation pipe on the simulation seat 200, so that the anti-rotation boss 105 is clamped in the simulation limit groove 205;

[0084] S2, Refer to Figure 4And Figure 5 Install the positioning seat 201 on the top of the front support 102 of the ventilation pipe, so that the bottom of the second mounting seat 207 fits against the top of the front support 102 of the ventilation pipe. Make the positioning teeth 211 fall into the simulated anti-rotation groove 206, and fix the positioning seat 201 on the front support 102 of the ventilation pipe through the clamping assembly 209. Since there is a definite angular correlation between the limiting groove 106 in the inner cavity of the shaft hole of the low-pressure turbine shaft 101 and the anti-rotation groove 107 at the end of the low-pressure turbine shaft 101, the geometric correlation between the anti-rotation groove 107 at the end of one or more low-pressure turbine shafts 101 and the limiting groove 106 of the low-pressure turbine shaft 101 is simulated through the simulation seat 200. The positioning seat 201 is fixed on the front support 102 of the ventilation pipe, so that the positioning teeth 211 and the anti-rotation boss 105 form a corresponding geometric correlation.

[0085] S3. Disconnect the positioning seat 201 and the front support 102 of the ventilation pipe from the simulation seat 200. Refer to Figure 6 Put the assembled positioning seat 201 and the front support 102 of the ventilation pipe into the through hole of the low-pressure turbine shaft 101, so that the positioning teeth 211 on the positioning seat 201 are stuck into the anti-rotation groove 107 of the low-pressure turbine shaft 101. At this time, the axial positions of the anti-rotation boss 105 and the limiting groove 106 correspond. That is to say, the problem of blind assembly and slot alignment during the assembly of the front support 102 of the ventilation pipe is transformed into the intuitive alignment of the positioning teeth 211 on the positioning seat 201 and the anti-rotation groove 107 at the end of the low-pressure turbine shaft 101, thereby improving the alignment accuracy and reducing the risk of misalignment during the installation process.

[0086] S4. Press the positioning seat 201 and the front support 102 of the ventilation pipe into the inner cavity of the low-pressure turbine shaft 101 through the force application assembly 215. Under the positioning and guiding action of the positioning teeth 211, the front support 102 of the ventilation pipe will not deflect and will move linearly along the axis. From right to left in Figure 7 and Figure 8 gradually make the anti-rotation boss 105 snap into the limiting groove 106 to complete the accurate assembly of the front support 102 of the ventilation pipe.

[0087] S5. Remove the force application assembly 215, and separate the positioning seat 201 from the front support 102 of the ventilation pipe through the clamping assembly 209 and take out the positioning seat 201.

[0088] Preferably, the clamping assembly 209 includes a stud 212, a nut 213 and a hook plate 214. The stud 212 passes through the second mounting seat 207, the nut 213 is threadedly fitted and fixed with the stud 212, the hook plate 214 is arranged at the bottom of the stud 212, and the hook plate 214 and the nut 213 are arranged at both ends of the stud 212.

[0089] In step S2, the bottom of the second mounting seat 207 fits against the top of the front support 102 of the ventilation pipe. Rotate the nut 213. When the free end of the hook plate 214 turns to the outside of the second mounting seat 207, the hook plate 214 cooperates with the inner wall of the end of the front support 102 of the ventilation pipe, so that the positioning seat 201 is fixed on the front support 102 of the ventilation pipe. Refer to Figure 8 , when the front support 102 of the ventilation pipe is pressed into the inner cavity of the low-pressure turbine shaft 101, the free end of the hook plate 214 always faces the outside of the second mounting seat 207, so that the positioning seat 201 and the front support 102 of the ventilation pipe are integrated.

[0090] In step S5, when the free end of the hook plate 214 turns to the inside of the second mounting seat 207, the hook plate 214 disengages from the inner wall of the end of the front support 102 of the ventilation pipe, so that the positioning seat 201 is separated from the front support 102 of the ventilation pipe, and the positioning seat 201 can be easily removed.

[0091] Preferably, the force application assembly 215 includes a force application seat 216 and a screw 217 rotatably engaged with the force application seat 216. In step S4, refer to Figure 7 and Figure 8 , first fix the force application seat 216 at the end of the low-pressure turbine shaft 101. Screw in the screw 217 to be threadedly engaged with the adapter threaded pipe 208, and rotate the screw 217 so that the positioning seat 201 drives the front support 102 of the ventilation pipe to enter the inner cavity of the low-pressure turbine shaft 101 to the left. The threaded thrust generated when the screw 217 rotates can overcome the frictional force generated by the interference fit between the rubber ring 104 and the inner hole wall of the low-pressure turbine shaft 101, and push the front support 102 of the ventilation pipe into the predetermined assembly position.

[0092] Preferably, the adapter threaded pipe 208 on the positioning seat 201 can be connected to a slide hammer. The front support 102 of the ventilation pipe can be disassembled from the inner hole of the low-pressure turbine shaft 101, so that the disassembly of the front support 102 of the ventilation pipe can be easily realized. That is, the blind mounting auxiliary alignment tool provided by the present invention can not only realize the assembly of the front support 102 of the ventilation pipe, but also realize the disassembly of the front support 102 of the ventilation pipe, and has both the functions of assembly and disassembly.

[0093] A blind installation auxiliary alignment tool and installation method provided by the present invention use the anti-rotation groove at the end of the low-pressure turbine shaft (always visible during the assembly process) to position and install the front support of the ventilation pipe. Since there is a definite angular relationship between the inner cavity limiting groove of the shaft hole of the low-pressure turbine shaft and the anti-rotation groove at the end of the low-pressure turbine shaft, the geometric relationship between the anti-rotation groove at the end of the low-pressure turbine shaft and the inner cavity limiting groove of the shaft hole of the low-pressure turbine shaft can be simulated by the simulation seat. First, place the front support of the ventilation pipe on the simulation seat, simulate the angular relationship between the front support of the ventilation pipe and the anti-rotation groove at the end of the low-pressure turbine shaft during actual assembly, determine the installation position of the positioning seat, and then accurately assemble the front support of the ventilation pipe according to the anti-rotation groove at the end of the low-pressure turbine shaft. By installing a force application seat on the external thread section at the end of the low-pressure turbine shaft, the screw installed on the force application seat can accurately push the positioning seat and the front support of the ventilation pipe into the predetermined assembly position.

[0094] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention falling within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A blind assembly auxiliary alignment tool, suitable for installing a front support of a vent pipe into an inner cavity of a low-pressure turbine shaft, wherein an anti-rotation boss is arranged around the front support of the vent pipe, an anti-rotation groove is arranged at the end of the low-pressure turbine shaft, a limiting groove is formed on the inner wall of the low-pressure turbine shaft, and the anti-rotation boss cooperates with the limiting groove structure; the blind assembly auxiliary alignment tool comprises: A simulation seat, comprising a first mounting seat and a plurality of support plates, a mounting ring is formed on the top of the first mounting seat, a simulation limit groove is provided on the top of the mounting ring, the simulation limit groove cooperates with the anti-rotation boss structure, a plurality of support plates are vertically arranged on the first mounting seat and arranged on the periphery of the mounting ring, and a simulation anti-rotation groove is provided on the top of the support plate; wherein the axial position relationship between the simulation limit groove and the simulation anti-rotation groove corresponds to the axial position relationship between the limit groove and the anti-rotation groove of the low-pressure turbine shaft; The positioning seat includes a second mounting seat, a transition threaded tube, a clamping assembly and a plurality of positioning columns. The transition threaded tube is vertically arranged on the second mounting seat. The clamping assembly is arranged on the periphery of the second mounting seat and is used to tighten or loosen the end of the front support of the ventilation pipe. The positioning column is vertically arranged on the second mounting seat, and a positioning tooth is extended outward from the top of the positioning column, and the positioning tooth cooperates with the simulated limit groove.

2. The blind assembly auxiliary alignment tool according to claim 1, characterized in that: The clamping assembly comprises a stud, a nut and a hook plate, the stud passes through the second mounting seat, the nut is threadedly matched with the stud for fixing, the hook plate is arranged at the bottom of the stud, and the hook plate and the nut are arranged at both ends of the stud; The nut is rotated to turn the free end of the hook plate toward the inside or outside of the second mounting seat.

3. The blind assembly auxiliary alignment tool according to claim 2, characterized in that: The bottom of the second mounting seat is fitted with the top of the front support of the ventilation pipe, and the nut is rotated. When the free end of the hook plate turns to the outside of the second mounting seat, the hook plate cooperates with the inner wall of the end of the front support of the ventilation pipe to fix the positioning seat on the front support of the ventilation pipe; when the free end of the hook plate turns to the inside of the second mounting seat, the hook plate is separated from the inner wall of the end of the front support of the ventilation pipe to separate the positioning seat from the front support of the ventilation pipe.

4. The blind assembly auxiliary alignment tool according to claim 1, characterized in that: It also includes a force-applying assembly, including a force-applying seat and a screw that rotatably cooperates with the force-applying seat, the force-applying seat is suitable for being fixed on the end of the low-pressure turbine shaft, the screw is threadably cooperated with the transition threaded pipe, and the screw is rotated so that the positioning seat drives the front support of the ventilation pipe to enter the inner cavity of the low-pressure turbine shaft.

5. The blind assembly auxiliary alignment tool according to claim 4, characterized in that: An internal thread is formed on the force-applying seat, and an external thread is provided at the end of the low-pressure turbine shaft. The internal thread and the external thread are threadably fixed to fix the force-applying assembly to the end of the low-pressure turbine shaft.

6. The blind assembly auxiliary alignment tool according to claim 1, characterized in that: The number of the positioning columns is the same as the number of the supporting plates.

7. A method for installing a front support of a vent pipe, using the blind installation auxiliary alignment tool as claimed in claim 1, characterized in that: The installation method comprises the steps of: S1, placing the front support of the vent pipe on the simulation seat, so that the anti-rotation boss is clamped in the simulation limit groove; S2, installing the positioning seat to the top of the front support of the vent pipe, making the bottom of the second mounting seat fit the top of the front support of the vent pipe, making the positioning teeth fall into the simulated anti-rotation groove, and fixing the positioning seat on the front support of the vent pipe by a clamping assembly; S3, separating the positioning seat and the front support of the vent pipe from the simulation seat, and placing them into the through hole of the low-pressure turbine shaft, so that the positioning teeth on the positioning seat are stuck in the anti-rotation groove of the low-pressure turbine shaft; S4, pressing the positioning seat and the front support of the ventilation pipe into the inner cavity of the low-pressure turbine shaft by a force-applying component, so that the anti-rotation boss is stuck in the limiting groove; S5, remove the force-applying assembly, separate the positioning seat from the front support of the ventilation pipe by means of a clamping assembly, and remove the positioning seat.

8. The installation method according to claim 7, characterized in that: The clamping assembly comprises a stud, a nut and a hook plate, the stud passes through the second mounting seat, the nut is threadedly matched with the stud for fixing, the hook plate is arranged at the bottom of the stud, and the hook plate and the nut are arranged at both ends of the stud; In step S2, the bottom of the second mounting seat is fitted with the top of the vent pipe front support, and the nut is rotated. When the free end of the hook plate turns to the outside of the second mounting seat, the hook plate cooperates with the inner wall of the end of the vent pipe front support, so that the positioning seat is fixed on the vent pipe front support; In step S5, when the free end of the hook plate turns to the inner side of the second mounting seat, the hook plate is separated from the inner wall of the end of the ventilating pipe front support, so that the positioning seat is separated from the ventilating pipe front support.

9. The installation method according to claim 7, characterized in that: The force applying assembly includes a force applying seat and a screw rod rotatably matched with the force applying seat; In step S4, the force-applying seat is fixed to the end of the low-pressure turbine shaft, the screw is threadably matched with the transition threaded pipe, and the screw is rotated so that the positioning seat drives the front support of the ventilation pipe into the inner cavity of the low-pressure turbine shaft.

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