Cartridge receiver dismounting tool and dismounting method

Abstract

The invention relates to the technical field of engine maintenance, and discloses a cartridge receiver disassembling tool and method, and the cartridge receiver disassembling tool comprises an annular cover plate suitable for being fixedly connected with a diffuser; an annular boss is arranged on the inner side of the annular ferrule, and the annular boss is suitable for abutting against a front port of the casing; the multiple threaded fasteners are suitable for being connected to the outer side of the annular cover plate in a threaded mode and then abut against the outer side of the front end of the annular ferrule. The casing is pushed out by combining the threaded fastener with the annular boss, the casing and the diffuser with huge friction force are separated, and time and labor are saved. According to the cartridge receiver disassembling tool, the cartridge receiver and the diffuser can be rapidly and effectively separated in a labor-saving mode, the cartridge receiver disassembling tool is simple in structure and convenient to store, the original structure cannot be deformed while the cartridge receiver is disassembled, original parts cannot be damaged, and the cartridge receiver disassembling efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of engine maintenance, and in particular to a casing disassembly tool and a disassembly method. Background Art

[0002] like Figure 1 and Figure 2 As shown, the casing 1 of the existing engine is generally a thin-walled structure, and the airflow flows along the axial direction of the engine. With the airflow outlet direction as the rear, the casing 1 is sleeved on the outside of the diffuser 2, and the side wall at the front port of the casing 1 is fixed to the diffuser 2 by the first bolt 3, one end of the centrifugal impeller cover 4 is located in the diffuser 2, and the rear end of the centrifugal impeller cover 4 is fixed to the convex edge provided in the diffuser 2 by six first screws 5. In addition, two circles of annular grooves are arranged on the outer wall of the diffuser 2 at intervals, and an O-ring 6 is sleeved in the groove; the O-ring 6 has a certain interference, so that the diffuser 2 and the casing 1 can achieve a sealing effect to prevent air leakage. During assembly, the diffuser 2 is generally pressed into the casing 1, and the O-ring 6 is located between the outer wall of the diffuser 2 and the inner wall of the casing 1. During disassembly, the first bolt 3 at the front end of the casing 1 is generally unscrewed first, and then the casing 1 is separated from the diffuser 2 by pulling the centrifugal impeller cover 4 and the casing 1 to both sides. During the pulling process, the two stress points are the centrifugal impeller cover 4 and the casing 1, the stress point of the centrifugal impeller cover 4 is at the front end, and the stress point of the casing 1 is the outer wall of the casing 1 or the support plate 7 at the tail end of the casing 1, which is located at the tail nozzle. The separation and disassembly process of the casing 1 is completed by holding the front end of the centrifugal impeller cover 4 and the outer wall of the casing 1, or by tying the front end of the centrifugal impeller cover 4 and the support plate 7 at the tail nozzle with a rope.

[0003] However, due to the presence of the O-ring 6, the casing 1 and the diffuser 2 fit closely, which significantly increases the friction between the casing 1 and the diffuser 2. In addition, the casing 1 has a thin-walled feature, and the outer surface of the casing 1 is difficult to grip and difficult to provide an effective force point. After unscrewing the first bolt 3, the diffuser 2 is difficult to be smoothly pulled out of the casing 1, resulting in the operation of disassembling the casing 1 being both laborious and time-consuming. Summary of the invention

[0004] In view of this, the present invention provides a casing disassembly tool to solve the problem that when the casing is disassembled, due to the presence of the O-ring, the casing and the diffuser fit tightly, which significantly increases the friction between the casing and the diffuser; in addition, the casing has a thin-walled feature, and the outer surface of the casing is difficult to grip and difficult to provide an effective force point. After the first bolt is unscrewed, the diffuser is difficult to be smoothly pulled out of the casing, resulting in the operation of disassembling the casing being both laborious and time-consuming.

[0005] In a first aspect, the present invention provides a casing disassembly tool, comprising:

[0006] An annular cover plate, the inner side of which is suitable for being fixedly connected to the diffuser;

[0007] An annular collar, with an annular boss provided on the inner side, the annular boss being suitable for abutting against the front port of the receiver;

[0008] A plurality of threaded fasteners are suitable for being threadedly connected to the outer side of the annular cover plate and then abutting against the outer side of the front end of the annular collar. Beneficial effects: The present application adopts the above technical solution, and utilizes the annular collar to increase the force-bearing area of ​​the casing, thereby preventing the front port of the casing from being subjected to excessive force and being squeezed and deformed; by utilizing threaded fasteners in combination with the annular boss to push out the casing, the casing and the diffuser with huge friction are separated, thus saving time and effort. The casing disassembly tool described in the present application can save effort, quickly and effectively separate the casing and the diffuser, and the casing disassembly tool has a simple structure and is easy to store. While realizing the disassembly of the casing, the original structure is not deformed, and the original parts are not damaged, thereby significantly improving the efficiency of disassembling the casing.

[0009] Optionally, a plurality of bosses are provided on the inner side of the annular cover plate, and the bosses are suitable for being fixedly connected to a flange provided in the diffuser.

[0010] Optionally, the inner diameter of the annular collar is larger than the inner diameter of the casing, and the inner diameter of the annular collar is larger than the outer diameter of the sealing ring provided between the casing and the diffuser. Beneficial effect: The present application adopts the above technical solution to prevent the annular collar from contacting the sealing ring, thereby affecting the disassembly of the casing.

[0011] Optionally, the ratio of the wall thickness of the casing to the diameter of the casing is less than 1 / 50.

[0012] Beneficial effect: The present application adopts the above technical solution to conveniently, quickly and accurately insert the annular collar into the front port of the receiver without causing bumps, while offsetting the negative impact of the annular collar being easily deformed due to the large diameter-to-thickness ratio, reducing the processing accuracy required for the annular collar and saving processing costs.

[0013] Optionally, at least one notch is provided on the annular ring, and two sides of the notch on the annular ring are detachably connected.

[0014] Optionally, the annular ring is two detachably connected semicircular rings.

[0015] Optionally, the number of the threaded fasteners is at least four, and the plurality of threaded fasteners are evenly distributed. Beneficial effects: The present application adopts the above technical solution to limit the number of threaded fasteners to prevent excessive displacement difference of the annular ring during the disassembly of the casing, thereby preventing structural damage.

[0016] Optionally, the number of the threaded fasteners is six.

[0017] In a second aspect, the present invention further provides a casing disassembly method, using the casing disassembly tool, comprising:

[0018] Install the casing disassembly tool between the casing and the diffuser;

[0019] The threaded fasteners are screwed evenly several times in diagonal order until the casing is separated from the diffuser; each time the threaded fasteners are screwed, they are screwed half a turn to one turn. Beneficial effect: The present application adopts the above technical solution, and the casing is pushed out by using the threaded fasteners in combination with the annular boss, so as to separate the casing and the diffuser with huge friction, thus saving time and effort. In addition, the casing disassembly method of the present application is used to apply force evenly to the casing to prevent deformation of the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a cross-sectional structural schematic diagram of the assembly of the casing and the diffuser in the prior art;

[0022] Figure 2 It is a partial cross-sectional structural schematic diagram of the assembly of the casing and the diffuser in the prior art;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the casing disassembly tool provided in an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the annular ring provided in an embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of a partial cross-section structure of the casing disassembly tool provided in an embodiment of the present invention before the casing is disassembled;

[0026] Figure 6 It is a schematic diagram of the partial cross-sectional structure of the casing disassembly tool provided in the embodiment of the present invention after the casing is disassembled.

[0027] Description of reference numerals:

[0028] 1. Casing; 2. Diffuser; 3. First bolt; 4. Centrifugal impeller cover; 5. First screw; 6. O-ring; 7. Support plate; 8. Annular cover plate; 9. Threaded fastener; 10. Annular ring. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] like Figure 1 and Figure 2 As shown, when disassembling the casing 1, the centrifugal impeller cover 4 is unevenly stressed. When too much force is applied, the centrifugal impeller cover 4 is likely to be deformed, seriously affecting the inner flow channel of the centrifugal impeller cover 4. The outer surface of the casing 1 is difficult to grasp and it is difficult to provide an effective force point. Even if the support plate 7 at the tail nozzle is tied with a rope, there is still uneven force due to the small radius at the tail nozzle. When disassembling the casing 1, it is also necessary to prevent collisions caused by inertia due to continuous application of external force after the casing 1 is separated. Therefore, the present application proposes a casing disassembly tool.

[0031] like Figures 3 to 6 A specific implementation of the casing disassembly tool shown includes: an annular cover plate 8, an annular collar 10 and a plurality of threaded fasteners 9.

[0032] like Figure 3 , Figure 5 and Figure 6As shown, the inner side of the annular cover plate 8 is suitable for being fixedly connected with the diffuser 2; specifically, the inner side of the annular cover plate 8 is provided with a plurality of bosses, and the bosses are suitable for being fixedly connected with the convex edge provided in the diffuser 2. The bosses can be evenly arranged in six pieces, and threaded holes are provided on the bosses. After the centrifugal impeller cover 4 is removed, the second bolt is screwed into the threaded hole to connect the annular cover plate 8 and the diffuser 2, and the annular cover plate 8 replaces the centrifugal impeller cover 4 as the force point for disassembling the casing 1. The inner side of the annular collar 10 is provided with an annular boss, and the annular boss is suitable for abutting against the front port of the casing 1, and the annular boss is used to provide a plane force point; the plurality of threaded fasteners 9 are suitable for being threadedly connected to the outer side of the annular cover plate 8 and abutting against the outer side of the front end of the annular collar 10. Specifically, the number of the threaded fasteners 9 is at least four, and the plurality of threaded fasteners 9 are evenly arranged. More specifically, the number of the threaded fasteners 9 is six. The threaded fastener 9 can be a second screw. There is enough space between the threaded fastener 9 and the outer diameter of the casing 1 to ensure that the threaded fastener 9 does not directly contact the casing 1 .

[0033] Specifically, the inner diameter of the annular collar 10 is larger than the inner diameter of the casing 1, and the inner diameter of the annular collar 10 is larger than the outer diameter of the sealing ring provided between the casing 1 and the diffuser 2, and the sealing ring is an O-ring 6. The ratio of the wall thickness of the casing 1 to the diameter of the casing 1 is less than 1 / 50, and it is a thin-walled casing. More specifically, the inner diameter of the annular collar 10 is 262 mm, and the inner diameter of the casing 1 is 260.6 mm. The inner diameter of the annular collar 10 is slightly larger than the inner diameter of the casing 1, and the wall thickness of the casing 1 is 1.3 mm; it can be known from calculation that the actual contact width between the annular collar 10 and the casing 1 is 0.6 mm. The size of the annular collar 10 poses a great challenge to the processing accuracy, and the inner diameter of the annular collar 10 is much larger than its thickness; and considering the deformation of the annular collar 10, it is difficult for the annular collar 10 to be smoothly inserted into the front port of the casing 1.

[0034] Therefore, further, Figure 4 As shown, the annular collar 10 is a non-closed collar. At least one notch is provided on the annular collar 10, and the central angle of the notch on the annular collar 10 can be 1.5°. The two sides of the notch on the annular collar 10 are detachably connected; specifically, through holes with a diameter of 4.1 mm can be provided on both sides of the notch on the annular collar 10, and then M4 screws are passed through the through holes and then tightened with nuts, so that the annular collar 10 shrinks and the annular boss is suitable for abutting against the front port of the receiver 1; or the annular collar 10 is two detachably connected semicircular collars, and the two semicircular collars can also be connected by the aforementioned M4 screws and nuts.

[0035] The present invention also provides a casing disassembly method, which uses the casing disassembly tool, comprising the following steps:

[0036] S1, installing the casing disassembly tool between the casing 1 and the diffuser 2;

[0037] S2. Tighten the threaded fasteners 9 evenly for multiple times in diagonal order, and while the annular collar 10 is pushed down by the threaded fasteners 9, the casing 1 is driven to move together until the casing 1 is separated from the diffuser 2; each time the threaded fasteners 9 are tightened, tighten half a turn to one turn.

[0038] It has been verified in practice that the casing disassembly tool and method described in the present application have successfully achieved the disassembly of the engine casing 1 many times, and after the casing 1 is disassembled, neither the diffuser 2 nor the casing 1 is deformed or worn.

[0039] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A casing disassembly tool, characterized in that: include: An annular cover plate (8), the inner side of which is suitable for being fixedly connected to the diffuser (2); An annular collar (10) is provided with an annular boss on its inner side, wherein the annular boss is suitable for abutting against a front port of the casing (1); A plurality of threaded fasteners (9) are suitable for being threadedly connected to the outer side of the annular cover plate (8) and then abutting against the outer side of the front end of the annular collar (10).

2. The casing disassembly tool according to claim 1, characterized in that: A plurality of bosses are provided on the inner side of the annular cover plate (8), and the bosses are suitable for being fixedly connected to a convex edge provided in the diffuser (2).

3. The casing disassembly tool according to claim 1, characterized in that: The inner diameter of the annular collar (10) is greater than the inner diameter of the casing (1), and the inner diameter of the annular collar (10) is greater than the outer diameter of a sealing ring provided between the casing (1) and the diffuser (2).

4. The casing disassembly tool according to claim 1, characterized in that: The ratio of the wall thickness of the casing (1) to the diameter of the casing (1) is less than 1 / 50.

5. The casing disassembly tool according to any one of claims 1 to 4, characterized in that: The annular ring (10) is a non-closed ring.

6. The casing disassembly tool according to claim 5, characterized in that: At least one notch is provided on the annular collar (10), and two sides of the notch on the annular collar (10) are detachably connected.

7. The casing disassembly tool according to any one of claims 1 to 4, characterized in that: The annular collar (10) is two detachably connected semicircular collars.

8. The casing disassembly tool according to any one of claims 1 to 4, characterized in that: The number of the threaded fasteners (9) is at least four, and the plurality of threaded fasteners (9) are evenly distributed.

9. The casing disassembly tool according to claim 8, characterized in that: The number of the threaded fasteners (9) is six.

10. A method for disassembling a casing, using the casing disassembly tool according to any one of claims 1 to 9, characterized in that: include: Installing the casing disassembly tool between the casing (1) and the diffuser (2); The threaded fasteners (9) are uniformly screwed multiple times in diagonal order until the casing (1) and the diffuser (2) are separated; each time the threaded fasteners (9) are screwed, they are screwed half a turn to one turn.

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