CN112743312B - Disassembling device and disassembling method for engine case - Google Patents
Disassembling device and disassembling method for engine case Download PDFInfo
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- CN112743312B CN112743312B CN201911050657.8A CN201911050657A CN112743312B CN 112743312 B CN112743312 B CN 112743312B CN 201911050657 A CN201911050657 A CN 201911050657A CN 112743312 B CN112743312 B CN 112743312B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
Abstract
The invention relates to a device and a method for disassembling an engine case. The disassembling device of the engine case comprises an upper seat assembly, a lower seat assembly and a lower seat assembly, wherein the upper seat assembly comprises a top seat, a bolt, a spring and a hollow column extending downwards along the bottom of the top seat; lower subassembly, including the base and along the top surface of base upwards the fore-set that extends, the bottom surface of base can with the mounting flange limit of casket B and the mounting flange limit cooperation location of casket A, and the bottom surface of base supports and leans on the mounting flange edge of casket A, and in the top of fore-set upwards stretched into hollow post, the bottom of spring supported and leaned on the top surface in the fore-set. The invention provides a disassembling device and a disassembling method of an engine case, which are convenient to operate integrally, can improve the disassembling efficiency of the engine case and can reduce disassembling damage.
Description
Technical Field
The invention relates to the technical field of structure and application of an engine case in an aircraft engine, in particular to a device and a method for decomposing the engine case.
Background
The casing is the main component of the engine stator, and part of the casing is the main bearing frame of the engine, and in order to ensure the coaxiality of the assembled casings, the casings are usually connected through interference short rabbets. Fig. 1 shows a schematic diagram of a conventional engine case connection structure. FIG. 2 shows a schematic view of the engine case with the removable fasteners removed. As shown, the engine case 100 includes a case A101 and a case B102, a mounting flange edge 107 of the case B102 is vertically matched with a mounting flange edge 106 of the case A101, and a notch 108 is formed on the mounting flange edge 107 of the case B102 and the mounting flange edge 106 of the case A101. Corresponding jackscrew holes 104 are formed in a mounting flange edge 107 of the casing B102 and a mounting flange edge 106 of the casing A101, and a detachable fastener 103 penetrates through the jackscrew holes 104 to enable the two to be matched and positioned up and down.
Since the thrust-weight ratio is an important index of the engine, the thickness of the engine case 100 needs to be reduced as much as possible to reduce the weight of the engine case and thus increase the thrust-weight ratio while ensuring sufficient rigidity. Referring to fig. 1, the tightness of fit of the mounting flange edge 107 of the casing B102 and the mounting flange edge 106 of the casing a101 is about 0.1-0.15mm, the thickness L of the mounting flange edge 107 of the casing B102 is less than 5mm, the jackscrew hole 104 is provided and the edge chamfer of the jackscrew hole 104 is removed, and the effective thickness L of the mounting flange edge 107 of the casing B102 is less than 3 mm. When disassembly inspection of the casing a101 and the casing B102 is required, the disassembly is difficult due to the fact that the mounting flange edge 107 of the casing B102 and the mounting flange edge 106 of the casing a101 are rusted and adhered to each other during disassembly because of the different conditions encountered during operation or storage of the engine casing 100.
The conventional disassembly operation is to hang the casing B102 by a crane after removing the fastener 103, and to realize the disassembly of the casing a101 and the casing B102 by hammering the outer wall of the casing a101 obliquely downward by a rubber hammer, which is likely to cause damage to the outer wall of the casing a101 in this disassembly mode. Meanwhile, the mounting flange edge 107 of the casing B102 is also easily damaged due to the small thickness L.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a disassembling device and a disassembling method of an engine case, which are suitable for disassembling the engine case, are convenient to operate integrally, can improve the disassembling efficiency of the engine case and can reduce damage.
Specifically, the invention provides a disassembling device for an engine case, wherein the engine case comprises a case A and a case B, a mounting flange edge of the case B is matched with a mounting flange edge of the case A up and down, the case B and the mounting flange edge of the case A are provided with corresponding jackscrew holes, and the case B and the mounting flange edge of the case B are matched with each other up and down and positioned by penetrating a detachable fastener into the jackscrew holes, and the disassembling device comprises:
the upper seat assembly comprises a top seat, a bolt, a spring and a hollow column extending downwards along the bottom of the top seat, the top surface of the top seat can be matched and fixed with the rear flange edge of the casing B, the bolt is in threaded fit with the top seat, the bottom of the bolt penetrates through the top seat downwards and falls into the hollow column, and the spring is arranged in the hollow column and surrounds the bolt;
lower subassembly, including base and edge the top surface of base upwards extends a fore-set, the bottom surface of base can with cartridge receiver B's mounting flange limit with cartridge receiver A's mounting flange limit cooperation location, just the bottom surface of base supports and leans on cartridge receiver A's mounting flange edge, the top of fore-set upwards stretches into in the hollow column, the bottom of spring support lean on in the top surface of fore-set.
According to one embodiment of the present invention, the top surface of the top seat is provided with a first positioning pin protruding upwards, and the first positioning pin is matched with the opening on the rear flange edge of the casing B for positioning.
According to an embodiment of the present invention, two first positioning pins are provided, and are respectively positioned in cooperation with two adjacent openings on the rear flange edge of the casing B.
According to an embodiment of the present invention, the upper seat assembly further includes a reinforcing rib, one side of which is formed on the bottom surface of the upper seat, and the other side of which is formed on the outer surface of the hollow post.
According to one embodiment of the invention, the bottom surface of the base is provided with a second positioning pin protruding downwards and matched with the jackscrew hole for positioning.
According to one embodiment of the invention, the number of the second positioning pins is two, and the two second positioning pins are respectively matched and positioned with two adjacent jackscrew holes.
According to one embodiment of the invention, a downward boss is formed on the bottom surface of the base, the boss is matched with a notch formed between the mounting flange edge of the casing B and the mounting flange edge of the casing A, and the boss abuts against the mounting flange edge of the casing A.
According to one embodiment of the invention, the top of the top post is a clearance fit with the hollow post.
According to an embodiment of the present invention, a guide groove is formed in the top pillar, the guide groove is formed along a longitudinal direction of the top pillar, and a third positioning pin is fixedly disposed on the hollow pillar, and the third positioning pin falls into the guide groove.
The invention also provides a decomposition method using the decomposition device, which comprises the following steps:
step S1: arranging a plurality of the decomposing devices at the periphery of the engine case, so that the top surface of the top seat of each decomposing device is matched and fixed with the rear flange edge of the case B, and the bottom surface of the base can be matched and positioned with the mounting flange edge of the case B and the mounting flange edge of the case A;
step S2: and screwing the bolt of each decomposition device downwards, wherein the bottom end of the bolt pushes the top surface of the top column downwards to separate the casing B from the casing A.
According to an embodiment of the present invention, in step S1, the top surface of the top seat of the disassembling apparatus and the bottom surface of the base are pressed to make the disassembling apparatus in a compressed state, the disassembling apparatus is placed between the rear flange edge and the mounting flange edge of the casing B, the disassembling apparatus is released to make the top surface of the top seat and the rear flange edge of the casing B fit and fix, so that the bottom surface of the base can be positioned with the mounting flange edge of the casing B, and the bottom surface of the base abuts against the mounting flange edge of the casing a.
According to one embodiment of the present invention, in step S2, the bolts of the respective decomposition devices are screwed a plurality of times according to a symmetrical circulation principle.
According to one embodiment of the invention, at least 4 said disaggregation apparatus are arranged at the periphery of the engine case and are evenly distributed along the periphery of the engine case.
The invention provides a disassembling device and a disassembling method of an engine case, wherein the disassembling device comprises an upper seat assembly and a lower seat assembly which are matched with each other, so that the disassembling operation is convenient, the disassembling efficiency of the engine case can be improved, and the damage to the engine case can be reduced.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention.
In the drawings:
fig. 1 shows a schematic diagram of a conventional engine case connection structure.
FIG. 2 shows a schematic view of the engine case with the removable fasteners removed.
Fig. 3 shows a state diagram of the use of the disassembling apparatus according to an embodiment of the present invention.
Fig. 4 is a partially enlarged schematic view of fig. 3.
Fig. 5 shows a schematic structural diagram of a decomposition device according to an embodiment of the present invention.
Fig. 6 is a cross-sectional view of fig. 5.
Fig. 7 is a schematic structural view of the lower seat assembly of fig. 5.
FIG. 8 shows a flow diagram of a decomposition method of one embodiment of the invention.
Wherein the figures include the following reference numerals:
Casing B102 fastener 103
Mounting flange edges 106, 107 with notches 108
The lower housing assembly 202 and the top housing 203
Bolt 204 spring 205
Stiffener 210 second locating pin 211
Boss 212 guide groove 213
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.
Fig. 3 shows a state diagram of the use of the disassembling apparatus according to an embodiment of the present invention. Fig. 4 is a partially enlarged schematic view of fig. 3. The operation of the engine case disassembly apparatus provided by the present invention will be briefly described herein. As shown, in disassembling the engine case 100, a plurality of disassembly apparatus 200 are disposed between the rear flange edge 105 of the case B102 and the mounting flange edge 106 of the case A101. The disassembling apparatus 200 is operated to complete the disassembly of the engine case 100 by pushing the bottom surface of the rear flange edge 105 of the case B102 and the top surface of the mounting flange edge 106 of the case a101, such that the mounting flange edge 107 of the case B102 and the mounting flange edge 106 of the case a101 are disengaged from each other, i.e. the case B102 is pushed and then disengaged from the case a101 upwards, or the case a101 is pushed and disengaged from the case B102 downwards. The disassembly process of the engine case 100 will be described in detail later.
Fig. 5 shows a schematic structural diagram of a decomposition device according to an embodiment of the present invention. Fig. 6 is a cross-sectional view of fig. 5. Fig. 7 is a schematic structural view of the lower seat assembly of fig. 5. As shown, the disassembly apparatus 200 of the engine case 100 includes an upper seat assembly 201 and a lower seat assembly 202.
The upper seat assembly 201 includes a top seat 203, a bolt 204, a spring 205, and a hollow column 206 extending downward along the bottom of the top seat 203. The top surface of the top seat 203 can be positioned to mate with the bottom surface of the rear flange 105 of the casing B102. The bolt 204 is threadedly engaged with the top mount 203 and the bottom of the bolt 204 passes downwardly through the top mount 203 and falls into the hollow column 206. by turning the bolt 204, the bolt 204 can be raised or lowered within the hollow column 206. A spring 205 is disposed within the hollow post 206 and is disposed around the bolt 204.
The lower base assembly 202 includes a base 207 and a top post 208 extending upwardly along a top surface of the base 207. The bottom surface of base 207 can be positioned to mate with mounting flange edge 107 of case B102 and mounting flange edge 106 of case a 101. The bottom surface of the base 207 abuts the mounting flange edge 106 of the case a 101. The top of the top column 208 extends upwardly into the hollow column 206 and the top of the top column 208 engages the interior of the hollow column 206 to allow the top 203 and bottom 207 assemblies to slidably engage one another. The bottom end of the spring 205 abuts against the top surface of the top pillar 208, and the top end of the spring 205 abuts against the bottom surface of the top seat 203. The top seat 203 assembly and the bottom seat 207 assembly are pushed to move in a direction of separating from each other by the elastic force of the self-deformation of the spring 205.
The disaggregation apparatus 200 can be switched between the compressed state and the released state depending on the action of the spring 205. When the top surface of the top seat 203 of the upper seat assembly 201 in the decomposition device 200 is pressed downwards and simultaneously the bottom surface of the base 207 of the lower seat assembly 202 in the decomposition device 200 is pressed upwards, the top of the top column 208 is extended upwards into the hollow column 206 against the elastic force of the spring 205, and the upper seat assembly 201 and the lower seat assembly 202 are closed to each other to achieve a compressed state. When the pressing force on the decomposition device 200 is released, the upper seat assembly 201 and the lower seat assembly 202 move in the opposite direction of the approach by the spring 205, and the pressing force is released to reach the released state. The top column 208 and the hollow column 206 have substantially the same length direction, and the upper and lower seat assemblies 201 and 202 move toward and away from each other substantially along the length direction of the top column 208 and the hollow column 206.
Preferably, the top surface of the top seat 203 is provided with a first positioning pin 209 protruding upward. The casing B102 has a plurality of openings formed around the rear flange 105. The first locating pin 209 is capable of being positioned in cooperation with an opening in the rear flange edge 105 of the case B102. Preferably, two first positioning pins 209 are disposed on the top surface of the top seat 203 and are respectively positioned to cooperate with two adjacent openings on the rear flange edge 105 of the casing B102 to prevent the upper seat assembly 201 from rotating along the axial direction of the hollow post 206 during disassembly.
Preferably, a second step 216 is formed on the top surface of the top seat 203. When the first positioning pin 209 is engaged with the opening on the rear flange 105 of the casing B102, the outer edge of the rear flange 105 is attached and fixed to the second step 216, so that the top surface of the top seat 203 is attached and fixed to the rear flange 105 of the casing B102.
Preferably, the upper seat assembly 201 further includes a stiffener 210. One side of the reinforcing rib 210 is formed on the bottom surface of the top seat 203, and the other side of the reinforcing rib 210 is formed on the outer surface of the hollow post 206. The reinforcing ribs 210 serve to reinforce the rigidity of the upper seat assembly 201.
Further, a second positioning pin 211 protruding downward is provided on the bottom surface of the base 207. The mounting flange edge 107 of the casing B102 and the mounting flange edge 106 of the casing a101 are vertically matched, and corresponding jackscrew holes 104 are formed in the mounting flange edge and the mounting flange edge. The second positioning pin 211 is inserted downward into the jackscrew hole 104, and the two are matched to form positioning. Similarly, the bottom surface of the base 207 is provided with two second positioning pins 211, which are respectively positioned in cooperation with two adjacent bolt holes 104, so as to prevent the base 207 assembly from rotating along the axial direction of the stud 208 during the disassembly process.
Preferably, a downward projection 212 is formed on the bottom surface of the base 207, the projection 212 is engaged with the notch 108 formed between the mounting flange edge 107 of the casing B102 and the mounting flange edge 106 of the casing a101, and the bottom surface of the base 207 is abutted downward against the mounting flange edge 106 of the casing a101 by the projection 212 at the position of the notch 108. Preferably, two bosses 212 are formed on the bottom surface of the base 207 to respectively engage with the two adjacent slots 108. The two bosses 212 prevent the base 207 assembly from rotating axially along the top post 208 during disassembly, and provide a more balanced downward force when pushing the mounting flange 106 of the casing a101 downward. The height of the boss 212 is greater than the thickness of the mounting flange edge 107 of the case B102 so that the bottom surface of the base 207 does not touch the top surface of the mounting flange edge 107 of the case B102 when the boss 212 touches the mounting flange edge 106 of the case a 101.
Preferably, the top of the top post 208 is a clearance fit with the hollow post 206 to allow a sliding fit between the two to allow for the closing and separating of the upper seat assembly 201 and the lower seat assembly 202.
Preferably, the top pillar 208 of the lower housing assembly 202 has a guide groove 213 formed therein, and the guide groove 213 is formed along the length direction of the top pillar 208. A third positioning pin 214 is fixed to the hollow column 206, and the third positioning pin 214 is inserted into the guide groove 213. It is easy to understand that the length of the guiding groove 213 limits the stroke of the third positioning pin 214 moving up and down relatively, so that the relative moving distance of the upper seat assembly 201 and the lower seat assembly 202 is limited within the stroke range, and the two are not separated from each other or pressed excessively. At the same time, the third alignment pin 214 prevents the top post 208 from rotating relative to the hollow post 206, ensuring that the upper and lower seat assemblies 201, 202 remain in the opposite position.
Preferably, a first step 215 is formed on the top leg 208 of the lower seat assembly 202, and the first step 215 divides the top leg 208 into an upper portion and a lower portion. Wherein the cross-sectional area of the lower portion is greater than the cross-sectional area of the upper portion. Under the compression state, the maximum stroke of the bottom end of the hollow column 206 of the upper seat assembly 201 can touch the first step 215, and the first step 215 is used for limiting the descending distance of the hollow column 206, so that the damage of the third positioning pin is avoided, and the operation is convenient.
FIG. 8 shows a flow diagram of a decomposition method 300 of one embodiment of the invention. Referring to fig. 3 and 4, the present invention further provides a disassembling method 300 for disassembling an engine case 100 by using the disassembling apparatus 200, wherein the disassembling method 300 includes:
step S1: a plurality of the disassembling devices 200 are arranged on the periphery of the engine case 100, so that the top surface of the top seat 203 of each disassembling device 200 is matched and fixed with the rear flange edge 105 of the case B102, and the bottom surface of the base 207 can be matched and positioned with the mounting flange edge 107 of the case B102 and the mounting flange edge 106 of the case A101.
Step S2: the bolts 204 of the respective disassembling apparatuses 200 are screwed down, and the bottom ends of the bolts 204 push down the top surfaces of the top posts 208 to separate the casing B102 from the casing a 101.
Preferably, in step S1, the top surface of the top seat 203 and the bottom surface of the bottom seat 207 of the decomposition device 200 are pressed to make the decomposition device 200 in a compressed state. The disassembling apparatus 200 is placed between the rear flange edge 105 and the mounting flange edge 106/107 of the casing B102, and the disassembling apparatus 200 is released, so that the top surface of the top seat 203 is fixed to the rear flange edge 105 of the casing B102, the bottom surface of the base 207 is fixed to the mounting flange edge 107 of the casing B102, and the bottom surface of the base 207 abuts against the mounting flange edge 106 of the casing a 101.
Preferably, in step S2, the bolts 204 of the respective decomposition devices 200 are screwed multiple times according to the symmetrical circulation principle. In order to avoid inclination caused by uneven ejection force during the disassembly process, and further to avoid the possibility of damage to the engine case 100, when the bolt 204 is tightened, the bolt 204 should be screwed according to the principle of symmetric circulation, and the screwing should be performed for multiple times, so as to avoid stress concentration on one side.
Preferably, at least 4 decomposers 200 are arranged around the engine case 100 and are distributed along the circumference of the engine case 100.
The process of disassembling the engine case 100 using the disassembling apparatus 200 will be described in detail below with reference to all the drawings.
1. The top surface of the top seat 203 of the disassembling apparatus 200 and the bottom surface of the base 207 are pressed, the top column 208 is slidably engaged with the hollow column 206, the spring 205 is deformed and compressed, the upper seat assembly 201 and the lower seat assembly 202 are close to each other, so that the disassembling apparatus 200 is in a compressed state, and in the compressed state, the distance between the top surface of the top seat 203 and the bottom surface of the base 207 should be smaller than the vertical distance between the rear flange edge 105 and the mounting flange edge 106/107 of the casing B102.
2. The deconsolidation device 200 is positioned between the rear flange edge 105 and the mounting flange edge 106/107 of the case B102. The disassembling apparatus 200 is stopped being pressed (released), and the top surface of the top seat 203 is engaged and fixed with the rear flange 105 of the casing B102 by the elastic force of the spring 205. Specifically, two first positioning pins 209 on the top surface extend upward into two adjacent openings on the rear flange 105 of the casing B102, respectively, and one side of the top surface is attached to the bottom surface of the rear flange 105 of the casing B102, so that the top seat 203 is fixed to the rear flange 105 in a matching manner. The two first positioning pins 209 prevent the upper seat assembly 201 from rotating axially along the hollow column 206 thereof;
such that the bottom surface of base 207 is positioned in engagement with mounting flange edge 107 of casing B102 and the bottom surface of base 207 abuts mounting flange edge 106 of casing a 101. Two second positioning pins 211 on the bottom surface of the base 207 are inserted downward into the jackscrew holes 104, and the second positioning pins 211 and the jackscrew holes 104 cooperate to position the lower seat assembly 202 and prevent the base 207 assembly from rotating in the axial direction of the top post 208 during disassembly. Meanwhile, the boss 212 on the bottom surface of the base 207 is engaged with the notch 108, and the boss 212 abuts downward against the mounting flange edge 106 of the casing a 101. Because the height of the boss 212 is greater than the thickness of the mounting flange edge 107 of the casing B102, the boss 212 on the base 207 abuts against the mounting flange edge 106 of the casing a101, and the bottom surface of the base 207 does not touch the mounting flange edge 107 of the casing B102.
3. The plurality of the disassembling apparatuses 200 are installed at the periphery of the engine case 100 according to the above-mentioned steps, and the distances between two adjacent disassembling apparatuses 200 are equal.
4. The bolts 204 on each decomposing device 200 are repeatedly and slowly screwed according to the principle of symmetrical circulation. The bottom end of the bolt 204 touches down on the top surface of the top post 208 and the bolt 204 continues to descend pushing against the top surface of the top post 208. The reaction force generated between the casing a101 and the casing B102 by the decomposition device 200 separates the casing B102 from the casing a 101.
The disassembly device 200 and the disassembly method 300 of the engine case 100 skillfully utilize the notch 108 on the case B102, and the engine case 100 is disassembled by applying thrust to the exposed part of the case A101 at the notch 108 and the rear flange edge 105 of the case B102, so that the case A101 is not damaged in the disassembly process, the operation is simple, and the disassembly efficiency is high.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (11)
1. The decomposition device of engine machine casket, the engine machine casket includes casket A and casket B, the mounting flange limit of casket B with the cooperation from top to bottom on the mounting flange limit of casket A has seted up corresponding jackscrew hole between them, penetrates through a detachable fastener jackscrew hole makes between them cooperate the location from top to bottom, the decomposition device includes:
the upper seat assembly comprises a top seat, a bolt, a spring and a hollow column extending downwards along the bottom of the top seat, the top surface of the top seat can be matched and fixed with the rear flange edge of the casing B, the bolt is in threaded fit with the top seat, the bottom of the bolt penetrates through the top seat downwards and falls into the hollow column, and the spring is arranged in the hollow column and surrounds the bolt;
the lower seat assembly comprises a base and a top column extending upwards along the top surface of the base, the bottom surface of the base can be matched and positioned with the mounting flange edge of the casing B and the mounting flange edge of the casing A, the bottom surface of the base abuts against the mounting flange edge of the casing A, the top of the top column extends upwards into the hollow column, and the bottom end of the spring abuts against the top surface of the top column;
the top of the top column is in clearance fit with the hollow column;
the hollow column is fixedly provided with a third positioning pin, and the third positioning pin falls into the guide groove.
2. The engine case disassembly apparatus of claim 1, wherein the top surface of the top seat is provided with a first positioning pin protruding upward to be positioned in cooperation with the opening on the rear flange side of the case B.
3. The engine case disassembly apparatus of claim 2, wherein said first positioning pins are two and are respectively positioned to be engaged with two adjacent openings on the rear flange of said case B.
4. The engine case disassembly apparatus of claim 1, wherein the upper block assembly further comprises a reinforcing rib, one side of which is formed on the bottom surface of the top block, and the other side of which is formed on the outer surface of the hollow cylinder.
5. The engine case disassembly apparatus of claim 1, wherein the bottom surface of the base is provided with a second positioning pin protruding downward to be positioned in cooperation with the jackscrew hole.
6. The engine case disassembly apparatus of claim 5, wherein two of the second positioning pins are respectively positioned to cooperate with two of the adjacent bolt holes.
7. The engine case disassembly apparatus of claim 1, wherein a downward projection is formed on a bottom surface of the base, the projection is engaged with a notch formed between a mounting flange edge of the case B and a mounting flange edge of the case a, and the projection abuts against the mounting flange edge of the case a.
8. A decomposition method using the decomposition device according to claim 1, wherein the decomposition method comprises:
step S1: arranging a plurality of the decomposing devices at the periphery of the engine case, so that the top surface of the top seat of each decomposing device is matched and fixed with the rear flange edge of the case B, and the bottom surface of the base can be matched and positioned with the mounting flange edge of the case B and the mounting flange edge of the case A;
step S2: and screwing the bolt of each decomposition device downwards, wherein the bottom end of the bolt pushes the top surface of the top column downwards to separate the casing B from the casing A.
9. The disassembling method of claim 8, wherein in step S1, the top surface of the top seat of the disassembling apparatus and the bottom surface of the bottom seat are pressed to place the disassembling apparatus in a compressed state, the disassembling apparatus is placed between the rear flange edge and the mounting flange edge of the casing B, and the disassembling apparatus is released so that the top surface of the top seat and the rear flange edge of the casing B are fixed in a matching manner, the bottom surface of the bottom seat can be fixed in a matching manner with the mounting flange edge of the casing B, and the bottom surface of the bottom seat abuts against the mounting flange edge of the casing a.
10. The decomposition method according to claim 8, wherein the bolts of the respective decomposition devices are screwed a plurality of times in accordance with a symmetrical circulation principle at step S2.
11. The disassembly method of claim 8, wherein at least 4 of said disassembly apparatuses are arranged at the periphery of said engine case, and are uniformly distributed along the periphery of said engine case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911050657.8A CN112743312B (en) | 2019-10-31 | 2019-10-31 | Disassembling device and disassembling method for engine case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911050657.8A CN112743312B (en) | 2019-10-31 | 2019-10-31 | Disassembling device and disassembling method for engine case |
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| CN112743312A CN112743312A (en) | 2021-05-04 |
| CN112743312B true CN112743312B (en) | 2022-02-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114714081B (en) * | 2022-04-19 | 2023-01-31 | 中国航发动力股份有限公司 | Decomposition method for decomposing front bearing seat casing |
| CN115008170B (en) * | 2022-06-24 | 2023-09-26 | 江西中发天信航空发动机科技有限公司 | Linkage type numerical control separator for outer casing |
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| DE4316889C2 (en) * | 1993-05-19 | 1995-11-23 | G & K Montagen Gmbh | Device for pushing apart opposite parts, in particular flange connections |
| JP2003305665A (en) * | 2002-04-11 | 2003-10-28 | Keizo Otori | Flange space extending tool, flange with extending function, and flange space extending method |
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| CN108709026A (en) * | 2018-08-06 | 2018-10-26 | 常州奥特斯丹智能装备科技有限公司 | A kind of pipe flange top opening |
| JP2019166610A (en) * | 2018-03-26 | 2019-10-03 | 株式会社荏原製作所 | Press bolt for disassembling flange |
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| JPS6181010U (en) * | 1984-10-31 | 1986-05-29 | ||
| US5129136A (en) * | 1991-03-22 | 1992-07-14 | Richardson H Gary | Flange spreader |
| DE4316889C2 (en) * | 1993-05-19 | 1995-11-23 | G & K Montagen Gmbh | Device for pushing apart opposite parts, in particular flange connections |
| JP2003305665A (en) * | 2002-04-11 | 2003-10-28 | Keizo Otori | Flange space extending tool, flange with extending function, and flange space extending method |
| CN201195299Y (en) * | 2008-03-18 | 2009-02-18 | 中冶宝钢技术服务有限公司 | Tube seat top-pushing device |
| CN203665460U (en) * | 2014-02-11 | 2014-06-25 | 王咫 | Valve flange expansion opener |
| CN108705274A (en) * | 2018-02-12 | 2018-10-26 | 徐桂根 | The attaching/detaching apparatus of easy vertical straight-arm flanged joint equipment |
| JP2019166610A (en) * | 2018-03-26 | 2019-10-03 | 株式会社荏原製作所 | Press bolt for disassembling flange |
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| CN112743312A (en) | 2021-05-04 |
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