CN218518568U

CN218518568U - Tool for disassembling bushing of casing in middle of GTF engine fan

Info

Publication number: CN218518568U
Application number: CN202221770132.9U
Authority: CN
Inventors: 邹仁松; 许环逍; 周毅雄; 杨彬; 王顺
Original assignee: MTU Maintenance Zhuhai Co Ltd
Current assignee: MTU Maintenance Zhuhai Co Ltd
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2023-02-24
Anticipated expiration: 2032-07-11

Abstract

The utility model discloses a frock is disassembled to quick-witted casket bush in middle of GTF engine fan, including discoid base, lifter plate, at least three claw, T type screw rod and torque wrench, torque wrench fixes in T type screw rod upper end, and the rotatable installation of T type screw rod lower extreme is on the base, and lifter plate suit is on T type screw rod and screw-thread fit with it, and the lifter plate is located between torque wrench and the base, and the claw is microscler block, but its upper end is along radial slidable mounting on the lifter plate, and it has the slotted hole that supplies the claw to draw out to stretch out downwards to open on the base, and the claw lower extreme is equipped with the trip that radially stretches out outwards. The utility model discloses an adjust the position of pulling pawl and make the bottom surface contact of trip and bush, rotating torque wrench, lifter plate move the pulling pawl rebound and then take out the bush, can make the operator take out the major diameter bush that the damage is light with the power of minimum, convenient operation can be fast safely take out the damage bush, can not cause any damage to the spare part.

Description

Tool for disassembling bushing of middle casing of GTF engine fan

Technical Field

The utility model relates to a frock is disassembled to quick-witted casket bush in middle of GTF engine fan.

Background

GTF geared fan engines are the most recently developed products of the general companies that are gaining increased acceptance and favor from airlines through superior performance and fuel efficiency.

The middle fan casing is one of important components of the GTF engine, is positioned in a low-pressure compressor part, is an important bearing structure, and is provided with a bushing for supporting a No. 2 bearing which is more critical in the GTF engine, so that the quality of the middle fan casing has important influence on the overall performance of the engine.

Currently, all aeroengine maintenance stations in the world are in the stage of starting to establish the maintenance capability of the GTF engine, so that various reliable maintenance methods need to be developed to enable the engine to have the airworthiness again. In all models maintained by the applicant at present, the size of a bush to be disassembled on an engine part is smaller, and the diameter is basically within 20mm, but the diameter size of a middle casing bush of a fan of a GTF engine of a new model reaches nearly 300mm, so that the industry needs to design a special tool capable of safely and reliably disassembling a damaged bush.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a frock is disassembled to quick safe, the convenient middle quick-witted casket bush of GTF engine fan of simple structure, with low costs.

The purpose of the utility model is realized through the following technical measures: the utility model provides a frock is disassembled to quick-witted casket bush in middle of GTF engine fan, its characterized in that, it includes discoid base, lifter plate, at least three claw, T type screw rod and moment spanner of pulling out, the moment spanner is fixed the upper end of T type screw rod, the lower extreme of T type screw rod is rotatable to be installed on the base, the lifter plate suit is in on the T type screw rod and screw-thread fit with it, just the lifter plate is located between moment spanner and the base, pull out the microscler block body that the claw is vertical setting, its upper end along radial slidable mounting in on the lifter plate, it has the confession to open on the base pull out the slotted hole that the claw stretches out downwards, the lower extreme of pulling out the claw is equipped with along the trip that stretches out outwards.

The utility model discloses an adjust the position of pulling claw and make the bottom surface contact of trip and bush, rotating torque wrench, the lifter plate moves the pulling claw rebound and then takes out the bush, can make the operator take out the major diameter bush of damage with the light power of minimum, not only convenient operation can take out the bush of damage fast safely moreover, can not cause any damage to the spare part. The utility model discloses simple structure, it is with low costs, the practicality is strong, is favorable to using widely.

The axis of T type screw rod, lifter plate and base is located same straight line, and each pusher dog can make and wait to disassemble the even atress of bush along the circumference evenly distributed of lifter plate.

The utility model discloses the center of base is equipped with fixing bearing's bearing frame, the lower extreme of T type screw rod passes the bearing to it is fixed through nut locking, make the rotatable installation of T type screw rod is in on the base.

The utility model discloses the cover is equipped with T type nut on the T type screw rod, T type nut passes lifter plate center and its fixed connection and make lifter plate and T type screw rod screw-thread fit.

The utility model discloses it has the slide opening along radial extension to open on the lifter plate, the upper end of pulling claw has the screw that supplies to screw up the nut and penetrate, it passes the slide opening and screws and pull out the claw or unscrew so that the pull claw can follow the slide opening and remove the adjustment position to screw up the nut.

The utility model discloses it is visible to be equipped with on the base be equipped with visual the trip of pawl and the waist hole of the bush contact condition set up the waist hole on the base, not only can subtract heavy, and the person of facilitating the use sees the trip and the contact condition of bush through the waist hole moreover.

The pulling claw is the integrated into one piece structure that upper portion is the cuboid, the lower part is the trapezoidal body, the lateral surface of pulling claw is the evagination arcwall face of laminating mutually with the interior anchor ring of bush, can make trip and the interior anchor ring of bush laminate better to increase lifting surface.

Compared with the prior art, the utility model discloses has following effect that is showing:

the utility model discloses a position of adjusting the pulling pawl makes the bottom surface contact of trip and bush, rotating torque wrench, lifting plate move the pulling pawl rebound and then take out the bush, because of the design has extension arm of force spanner structure, can make the operator take out the major diameter bush of damage with the light of minimum power, convenient operation.

A few people use the utility model discloses an at least three pulling claw and lifter plate can take out the bush that damages fast safely, can not cause any damage to the part.

The waist hole is formed in the base, so that the weight can be reduced, and the contact condition of the clamping hook and the lining can be seen through the waist hole by a user.

Fourth the utility model discloses the lateral surface of pulling claw is the evagination arcwall face of laminating mutually with bush inner ring surface, can make trip and bush inner ring surface laminate better to increase lifting surface area.

The utility model discloses simple structure, it is with low costs, the practicality is strong, is favorable to using widely.

Drawings

The present invention will be described in further detail with reference to the following drawings and specific embodiments.

Fig. 1 is an axial cross-sectional view of the present invention;

FIG. 2 is a schematic structural view of the base of the present invention;

FIG. 3 is a schematic structural view of the lifter plate of the present invention;

fig. 4 is an axial sectional view of the claw of the present invention.

Detailed Description

As shown in fig. 1-4, the utility model relates to a frock is disassembled to quick-witted casket bush in middle of GTF engine fan, it includes discoid base 1, lifter plate 3, three claw 2, T type screw rod 6 and torque wrench 12, torque wrench 12 fixes the upper end at T type screw rod 6, the lower extreme of T type screw rod 6 is rotatable to be installed on base 1, lifter plate 3 suit is on T type screw rod 6 and screw-thread fit with it, and lifter plate 3 is located between torque wrench 12 and the base 1, claw 2 is the microscler massive body of vertical setting, but its upper end is along radial slidable mounting on lifter plate 3, the lower extreme of claw 2 is equipped with the trip 15 that radially stretches out outwards, it has three slotted hole 14 that supplies claw 2 to stretch out downwards and the visual three waist hole 18 that catches 15 and the bush 13 condition of contact of claw 2 to open on the base 1. The central axes of the T-shaped screw 6, the lifting plate 3 and the base 1 are positioned on the same straight line, and the pulling claws 2 are uniformly distributed along the circumferential direction of the lifting plate 3.

In the present embodiment, a bearing seat 7 with a bearing mounted thereon is fixed at the center of the base 1 by a screw 8, and after the lower end of the T-shaped screw 6 passes through the inner ring of the bearing, it is connected to the base 1 by a lock nut 10 so that the T-shaped screw 6 is rotatably mounted on the base 1. The T-shaped screw 6 is sleeved with a T-shaped nut 5, and the T-shaped nut 5 passes through the center of the lifting plate 3 and is fixedly connected with the lifting plate through a screw 8 so that the lifting plate 3 is in threaded fit with the T-shaped screw 6. Three sliding holes 16 extending along the radial direction are formed on the lifting plate 3, the upper end of the pulling claw 2 is provided with a screw hole 17 for the tightening nut 4 to penetrate, the tightening nut 4 penetrates through the sliding holes 16 and is tightened to position the pulling claw 2 or loosened to enable the pulling claw 2 to move along the sliding holes 16 to adjust the position. The sliding hole is designed to fixedly connect the claw with the lifting plate through the sliding hole, and simultaneously, the claw 2 can move along the radial direction, so that the claw is ensured to have enough space to move to a specified position.

In this embodiment, the claw 2 is an integrally formed structure with a rectangular upper portion and a trapezoidal lower portion, and the outer side surface 19 of the claw 2 is an outer convex arc surface attached to the inner annular surface of the bushing 13, so that the hook 15 and the inner annular surface of the bushing 13 can be better attached to each other, and the stressed area is increased.

Use the utility model discloses can demolish the big bush of the about 300mm of case diameter size in the middle of certain model GTF engine fan fast safely, it demolishs the process and is:

(1) Horizontally placing a base 1 of the tool on a flange surface on the inner side of a fan middle casing;

(2) Rotating a torque wrench 12 to adjust the claw 2 fixed on the lifting plate 3 to the lowest position;

(3) Horizontally pushing the three pulling claws 2 to enable the clamping hooks 15 to be in contact with the bottom surface of the bushing, and then screwing and screwing the nuts 4 to fix the pulling claws 2;

(4) The torque wrench 12 is rotated reversely, the lifting plate 3 moves upwards by rotating the T-shaped screw 6, and simultaneously drives the pulling claw 2 upwards, and the pulling claw 2 drives the bushing 13 to move out.

In other embodiments, the fingers may be more than three and evenly distributed along the circumference.

The above embodiments of the present invention are not right the utility model discloses the limited protection scope, the utility model discloses an embodiment is not limited to this, and all this kind of basis according to the utility model discloses an above-mentioned content, according to the ordinary technical knowledge and the conventional means in this field, is not deviating from the utility model discloses under the above-mentioned basic technical thought prerequisite, right the utility model discloses other multiple forms's that above-mentioned structure was made modification, replacement or change all should fall within the protection scope of the utility model.

Claims

1. The utility model provides a frock is disassembled to quick-witted casket bush in middle of GTF engine fan which characterized in that: it includes discoid base, lifter plate, at least three claw, T type screw rod and moment spanner, the moment spanner is fixed the upper end of T type screw rod, the lower extreme of T type screw rod is rotatable to be installed on the base, the lifter plate suit is in on the T type screw rod and screw-thread fit with it, just the lifter plate is located between moment spanner and the base, the claw is the microscler massive body of vertical setting, but its upper end is along radial slidable mounting in on the lifter plate, it has the confession to open on the base the slotted hole that the claw stretched out downwards, the lower extreme of claw is equipped with along the trip that radially stretches out outwards.

2. The tool for disassembling the intermediate casing bushing of the GTF engine fan according to claim 1, wherein: the central axes of the T-shaped screw, the lifting plate and the base are positioned on the same straight line, and the pulling claws are uniformly distributed along the circumferential direction of the lifting plate.

3. The tool for disassembling a GTF engine fan intermediate case bushing according to claim 2, wherein: and a bearing seat for fixing a bearing is arranged at the center of the base, and the lower end of the T-shaped screw rod penetrates through the bearing and is locked by a nut, so that the T-shaped screw rod can be rotatably arranged on the base.

4. The tool for disassembling the intermediate casing bushing of the GTF engine fan according to claim 3, wherein: the T-shaped screw is sleeved with a T-shaped nut, and the T-shaped nut penetrates through the center of the lifting plate to be fixedly connected with the lifting plate so that the lifting plate is in threaded fit with the T-shaped screw.

5. The tool for disassembling the intermediate casing bushing of the GTF engine fan according to claim 4, wherein: the lifting plate is provided with a sliding hole extending along the radial direction, the upper end of the pulling claw is provided with a screw hole for a screwing nut to penetrate through, and the screwing nut penetrates through the sliding hole and is screwed to position the pulling claw or unscrew so that the pulling claw can move along the sliding hole to adjust the position.

6. The tool for disassembling a GTF engine fan intermediate case liner according to claim 5, wherein: the base is provided with a waist hole through which the contact condition of the clamping hook of the pulling claw and the lining can be seen visually.

7. The tool for disassembling the intermediate casing bush of the GTF engine fan according to any one of claims 1 to 6, wherein: the upper part of the pulling claw is of an integrally formed structure of a rectangular body, the lower part of the pulling claw is of a trapezoidal body, and the outer side surface of the pulling claw is an outer convex arc-shaped surface attached to the inner ring surface of the bushing.