Disassembling puller and method for squirrel cage part

Abstract

The invention relates to the field of aero-engine assembly, in particular to a disassembling puller and method for squirrel cage parts. The disassembling puller comprises a bridging plate, a supporting plate, a driving disc, a shaft body and a pusher dog; the two support plates are mounted on the lower surface of the bridging plate; guide bosses are arranged at the two ends of the driving disc respectively, and a vertical kidney-shaped hole is formed in the supporting plate. The guide bosses at the two ends of the driving disc are inserted into the kidney-shaped holes of the supporting plates in a sliding mode respectively. A guide disc is arranged on the lower surface of the driving disc, and the upper end of the pusher dog sequentially penetrates through the guide disc and the driving disc and then is screwed with a fixing nut; the lower end of the shaft body is connected with a combined body formed by the driving disc, the guide disc and the pusher dog, and the upper end of the shaft body extends upwards and is screwed with a driving nut after penetrating out of a center hole of the bridging plate; and a handle rod is arranged on the driving nut. By adopting the disassembling puller, the squirrel cage parts can be simply, conveniently and easily disassembled, and the squirrel cage parts cannot be damaged.

Description

Technical Field

[0001] The invention relates to the field of aviation engine assembly, and in particular to a disassembly and extraction tool and a method for squirrel cage parts. Background Art

[0002] The squirrel cage parts are assembled in the turbine support. In actual production, the device needs to be disassembled and assembled many times for adjustment during the experiment. The general disassembly and disassembly method is difficult to achieve the function of easy disassembly. At present, the squirrel cage parts are generally taken out slowly by the fitter by directly hitting the reverse screw piles many times. This method causes the squirrel cage to reduce the sealing performance due to vibration, and even the risk of deformation. Therefore, there is an urgent need for a disassembly and extraction tool and method for squirrel cage parts, which makes the disassembly of squirrel cage parts simple and easy, and will not damage the squirrel cage parts. Summary of the invention

[0003] The main purpose of the present invention is to provide a disassembly and extraction tool and method for squirrel cage parts, aiming to solve the above technical problems.

[0004] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a disassembly and extraction tool for squirrel cage parts, comprising a bridge plate, a support plate, a driving disk, a shaft body and a pusher claw; two support plates are installed on the lower surface of the bridge plate; guide bosses are respectively arranged at both ends of the driving disk, and a vertical waist-shaped hole is arranged on the support plate; the guide bosses at both ends of the driving disk are respectively slidably inserted in the waist-shaped hole of the support plate; a guide disk is arranged on the lower surface of the driving disk, and the upper end of the pusher claw passes through the guide disk and the driving disk in turn and is screwed with a fixing nut; the lower end of the shaft body is connected to a combination formed by the driving disk, the guide disk and the pusher claw, and the upper end of the shaft body extends upward and passes through the center hole of the bridge plate and is screwed with a driving nut; a handle rod is arranged on the driving nut.

[0005] Preferably, straps are provided at both ends of the bridging plate, and the straps are used to overlap the mounting edge of the turbine support; bolt holes are provided on the straps for bolting the mounting edge of the turbine support.

[0006] Preferably, a flange plate is provided at the lower end of the shaft body, and the lower end of the shaft body is inserted into the center hole of the driving plate and the guide plate; the flange plate at the lower end of the shaft body abuts against the lower end surface of the guide plate, and the flange plate at the lower end of the shaft body is connected to the guide plate by a first screw.

[0007] Preferably, a limit pin is transversely inserted into the shaft body, and the cylindrical surface of the limit pin abuts against the top surface of the driving disk.

[0008] Preferably, a boss is integrally formed at the center of the top surface of the bridging plate; and the lower end surface of the driving nut abuts against the top surface of the boss.

[0009] Preferably, the outer cylindrical surface of the upper half of the shaft body is provided with an external thread, and the drive nut is screwed onto the external thread of the upper half of the shaft body.

[0010] Preferably, a handle bar is laterally inserted into the top of the shaft body.

[0011] Preferably, a plurality of lightening holes are provided on the bridging plate.

[0012] Preferably, the upper end of the support plate is bent to form a connecting plate, and the connecting plate is connected to the bridging plate by a second screw.

[0013] On the other hand, the present invention also provides a method for disassembling squirrel cage parts, using the above-mentioned disassembly tool, comprising the following steps:

[0014] S1. First, turn the handle rod to drive the drive nut to rotate, so that the drive nut moves to the uppermost end of the shaft;

[0015] S2. Overlap the two ends of the bridge plate on the mounting edge of the turbine support;

[0016] S3, pushing the shaft downward, driving the assembly formed by the driving plate, the guide plate, and the pusher claw to move downward, so that the guide plate is inserted into the central inner hole of the turbine support;

[0017] S4, insert the claw hook of the pusher into the grid slot of the squirrel cage part;

[0018] S5. Turn the handle rod to drive the drive nut to rotate. When the drive nut moves downward along the axial direction of the shaft body and abuts against the bridge plate, further rotate the drive nut to drive the shaft body to move upward, driving the combination formed by the drive plate, guide plate, and pusher claw to move upward. The pusher claw moves upward accordingly to remove the squirrel cage part from the central inner hole of the turbine support.

[0019] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0020] (1) By adopting the disassembly and extraction tool provided by the present invention, when in use, the two ends of the bridge plate are overlapped on the mounting edge of the turbine bearing, the shaft body is pushed downward, and the assembly formed by the drive plate, the guide plate, and the pusher claw is driven to move downward, so that the guide plate is inserted into the central inner hole of the turbine bearing; the claw hook of the pusher claw is extended into the grid groove of the squirrel cage part; the handle rod is pushed to drive the drive nut to rotate, and when the drive nut moves downward along the axial direction of the shaft body and abuts against the bridge plate, the drive nut is further rotated to drive the shaft body to move upward, driving the assembly formed by the drive plate, the guide plate, and the pusher claw to move upward, and the pusher claw moves upward accordingly to remove the squirrel cage part from the central inner hole of the turbine bearing.

[0021] (2) The disassembly tool and method provided by the present invention make it easy and convenient to disassemble the cage parts without damaging the cage parts.

[0022] (3) In the disassembly and extraction tool provided by the present invention, by utilizing the guide bosses at both ends of the driving disk to slide with the vertical waist-shaped holes on the support plate, it is possible to ensure that the assembly formed by the driving disk, the guide disk, and the claws can move up and down in the vertical direction, effectively avoiding the possibility of the claws being broken due to torsional force. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the disassembly puller provided by the present invention when disassembling the squirrel cage parts in the turbine support.

[0025] Explanation of the accompanying drawings: 1. Bridge plate; 1a. Strap plate; 1b. Boss; 1c. Lightening hole; 2. Support plate; 2a. Waist-shaped hole; 2b. Connecting plate; 3. Driving plate; 4. Shaft body; 5. Pusher claw; 6. Guide plate; 7. Fixing nut; 8. Driving nut; 9. Handle rod; 10. First screw; 11. Limit pin; 12. Handle rod; 13. Washer; 14. Second screw. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Combination Figure 1 As shown, on the one hand, this embodiment provides a disassembly and extraction tool for squirrel cage parts, including a bridge plate 1, a support plate 2, a driving disk 3, a shaft body 4 and a pusher claw 5; two support plates 2 are installed on the lower surface of the bridge plate 1; guide bosses are respectively provided at both ends of the driving disk 3, and a vertical waist-shaped hole 2a is provided on the support plate 2; the guide bosses at both ends of the driving disk 3 are respectively slidably inserted in the waist-shaped hole 2a of the support plate 2; a guide disk 6 is provided on the lower surface of the driving disk 3, and the upper end of the pusher claw 5 passes through the guide disk 6 and the driving disk 3 in sequence and is screwed with a fixing nut 7, the lower end of the shaft body 4 is connected to the combination formed by the driving disk 3, the guide disk 6 and the pusher claw 5, the upper end of the shaft body 4 extends upward and passes through the center hole of the bridge plate 1 and is screwed with a driving nut 8; a handle rod 9 is provided on the driving nut 8.

[0030] On the other hand, the present embodiment further provides a method for disassembling a squirrel cage component, using the above-mentioned disassembly tool, comprising the following steps:

[0031] S1. First, the handle rod 9 is moved to drive the driving nut 8 to rotate, so that the driving nut 8 moves to the uppermost end of the shaft body 4.

[0032] S2. Overlap the two ends of the bridge plate 1 on the mounting edge of the turbine support.

[0033] S3, push the shaft body 4 downward, drive the assembly formed by the driving plate 3, the guide plate 6, and the pusher claw 5 to move downward, so that the guide plate 6 is inserted into the central inner hole of the turbine support.

[0034] S4, inserting the claw hook of the pusher claw 5 into the grid groove of the squirrel cage component. Specifically, strip-shaped through holes (not shown in the figure) along the radial direction are provided on the guide plate 6 and the driving plate 3, and the upper end of the pusher claw 5 is inserted into the strip-shaped through holes on the guide plate 6 and the driving plate 3 in sequence, so that by adjusting the radial position of the pusher claw 5, the claw hook of the pusher claw 5 can be inserted into the grid groove of the squirrel cage component.

[0035] S5. Turn the handle rod 9 to drive the drive nut 8 to rotate. When the drive nut 8 moves downward along the axial direction of the shaft body 4 and abuts against the bridge plate 1, the drive nut 8 is further rotated to drive the shaft body 4 to move upward, driving the combination formed by the drive plate 3, the guide plate 6, and the pusher claw 5 to move upward. The pusher claw 5 then moves upward to remove the squirrel cage part from the central inner hole of the turbine support.

[0036] In this embodiment, the two ends of the bridge plate 1 are provided with straps 1a, which are used to overlap the mounting edge of the turbine support; the straps 1a are provided with bolt holes for bolting the mounting edge of the turbine support. By adopting this structure, in the step S2, when the two ends of the bridge plate 1 are overlapped on the mounting edge of the turbine support, the straps 1a are connected to the mounting edge of the turbine support by bolts, which plays a role in fixing the bridge plate 1.

[0037] A flange plate is provided at the lower end of the shaft body 4, and the lower end of the shaft body 4 is inserted into the center holes of the drive disk 3 and the guide disk 6; the flange plate at the lower end of the shaft body 4 abuts against the lower end surface of the guide disk 6, and the flange plate at the lower end of the shaft body 4 is connected to the guide disk 6 by a first screw 10. Further, a limit pin 11 is inserted transversely on the shaft body 4, and the cylindrical surface of the limit pin 11 abuts against the top surface of the drive disk 3. The limit pin 11 and the flange plate at the lower end of the shaft body 4 jointly form an axial limit effect on the assembly formed by the drive disk 3, the guide disk 6, and the pusher 5, so as to prevent the assembly from axially moving on the shaft body 4.

[0038] A boss 1b is integrally formed at the center of the top surface of the bridge plate 1; the lower end surface of the drive nut 8 abuts against the top surface of the boss 1b. In step S5, when the drive nut 8 moves downward along the axial direction of the shaft body 4 and abuts against the bridge plate 1, the drive nut 8 needs to be further rotated to drive the shaft body 4 to move upward. At this time, the mutual axial force between the drive nut 8 and the bridge plate 1 is relatively large, and the friction force generated is also relatively large. Therefore, by providing the boss 1b, the bridge plate 1 can be prevented from being worn and the durability of the bridge plate 1 can be improved.

[0039] In this embodiment, the outer cylindrical surface of the upper half of the shaft body 4 is provided with an external thread, and the drive nut 8 is screwed onto the external thread of the upper half of the shaft body 4 .

[0040] In this embodiment, a handle bar 12 is inserted transversely on the top of the shaft body 4 to facilitate pushing the shaft body 4 downward in step S3. During operation, both ends of the handle bar 12 can be held with both hands to push the shaft body 4 downward.

[0041] A plurality of lightening holes 1c are provided on the bridge plate 1 to reduce the weight of the bridge plate 1 and facilitate operation.

[0042] In this embodiment, the upper end of the support plate 2 is bent to form a connecting plate 2 b, and the connecting plate 2 b is connected to the bridging plate 1 via a second screw 14 .

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A disassembly and extraction tool for squirrel cage parts, characterized in that: The invention comprises a bridge plate (1), a support plate (2), a driving disk (3), a shaft body (4) and a pusher claw (5); the two support plates (2) are mounted on the lower surface of the bridge plate (1); guide bosses are respectively arranged at both ends of the driving disk (3), and a vertical waist-shaped hole (2a) is arranged on the support plate (2); the guide bosses at both ends of the driving disk (3) are respectively inserted and slidably arranged in the waist-shaped hole (2a) of the support plate (2); a guide disk (6) is arranged on the lower surface of the driving disk (3), and the upper end of the pusher claw (5) passes through the guide disk (6) and the driving disk (3) in sequence and is screwed with a fixing nut (7); the lower end of the shaft body (4) is connected to a combined body formed by the driving disk (3), the guide disk (6) and the pusher claw (5), and the upper end of the shaft body (4) extends upward and passes through the central hole of the bridge plate (1) and is screwed with a driving nut (8); a handle rod (9) is arranged on the driving nut (8).

2. A squirrel cage parts disassembly and extraction tool as claimed in claim 1, characterized in that: Straps (1a) are arranged at both ends of the bridge plate (1), and the straps (1a) are used to be overlapped on the mounting edge of the turbine support; bolt holes are arranged on the straps (1a) for bolting the mounting edge of the turbine support.

3. A squirrel cage parts disassembly and extraction tool as claimed in claim 1, characterized in that: A flange plate is arranged at the lower end of the shaft body (4), and the lower end of the shaft body (4) is inserted into the central holes of the driving disk (3) and the guide disk (6); the flange plate at the lower end of the shaft body (4) abuts against the lower end surface of the guide disk (6), and the flange plate at the lower end of the shaft body (4) is connected to the guide disk (6) by a first screw (10).

4. A squirrel cage parts disassembly and extraction tool as claimed in claim 3, characterized in that: A limit pin (11) is inserted transversely on the shaft body (4), and the cylindrical surface of the limit pin (11) abuts against the top surface of the driving disc (3).

5. A squirrel cage parts disassembly and extraction tool as claimed in claim 1, characterized in that: A boss (1b) is integrally formed at the center of the top surface of the bridge plate (1); the lower end surface of the drive nut (8) abuts against the top surface of the boss (1b).

6. A squirrel cage parts disassembly and extraction tool as claimed in claim 1, characterized in that: The outer cylindrical surface of the upper half of the shaft body (4) is provided with an external thread, and the drive nut (8) is screwed onto the external thread of the upper half of the shaft body (4).

7. A squirrel cage parts disassembly and extraction tool as claimed in claim 1, characterized in that: A handle bar (12) is inserted transversely on the top of the shaft body (4).

8. A squirrel cage parts disassembly and extraction tool as claimed in claim 1, characterized in that: A plurality of lightening holes (1c) are provided on the bridging plate (1).

9. A squirrel cage parts disassembly and extraction tool as claimed in claim 1, characterized in that: The upper end of the support plate (2) is bent to form a connecting plate (2b), and the connecting plate (2b) is connected to the bridging plate (1) via a second screw (14).

10. A method for disassembling squirrel cage parts, characterized in that: The disassembly and extraction tool according to any one of claims 1 to 9 comprises the following steps: S1. First, the handle rod (9) is moved to drive the driving nut (8) to rotate, so that the driving nut (8) moves to the uppermost end of the shaft body (4); S2, overlapping the two ends of the bridge plate (1) on the mounting edge of the turbine support; S3, pushing the shaft body (4) downward, driving the assembly formed by the driving plate (3), the guide plate (6) and the pusher claw (5) to move downward, so that the guide plate (6) is inserted into the central inner hole of the turbine support; S4, inserting the claw hook of the pusher claw (5) into the grid groove of the squirrel cage component; S5, the handle rod (9) is turned to drive the driving nut (8) to rotate. When the driving nut (8) moves downward along the axial direction of the shaft body (4) and abuts against the bridge plate (1), the driving nut (8) is further rotated to drive the shaft body (4) to move upward, driving the assembly formed by the driving plate (3), the guide plate (6) and the pusher claw (5) to move upward. The pusher claw (5) then moves upward to remove the squirrel cage part from the central inner hole of the turbine support.

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