CN213290126U - D-shaped bolt dismounting device for turbine disc - Google Patents

Abstract

The utility model relates to a turbine disk D type bolt dismounting device, it includes: the end ring of the drag hook is provided with a plurality of hook claws; the sleeve is sleeved on the drag hook; and a pulling mechanism configured to pull the draw hook to move in the sleeve; wherein the retractor is configured to: the hook claw is opened outwards under the natural state; under the state that the hook claw enters the sleeve, the hook claw is inwards contracted under the extrusion action of the sleeve and hooks the lining, and the pulling mechanism is utilized to apply pulling force to the lining through the pulling hook, so that the lining is detached from the turbine disc.

Description

D-shaped bolt dismounting device for turbine disc

Technical Field

The utility model relates to an aeroengine technical field especially relates to a turbine disk D type bolt dismounting device.

Background

In order to improve the performance of a low-pressure turbine and reduce the weight increase as much as possible while increasing the number of turbine stages, part of the turbine discs are designed in a compact structure, as shown in fig. 1 and 2, connecting bolts between the turbine discs 1 are in a structural form of adding D-shaped bolts 3 and bushings 2, the bushings 2 and connecting holes of the mounting edges of the turbine discs 1 are in interference fit, polished rod parts of the D-shaped bolts 3 are in clearance fit with inner holes of the bushings 2, and the D-shaped bolts 3 can freely move between annular steps and the mounting edges of the turbine discs 1 in a serial mode. As shown in figure 3, due to the interference fit, the height difference H between the annular platform of the bushing 2 and the turbine disc 1 is only 0.5mm, the operation space is small, when the assembly of the turbine disc is inspected and disassembled, the D-shaped bolt and the bushing are difficult to disassemble by adopting a conventional tool, and the bolt, the bushing and the turbine disc are easily damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a D type bolt dismounting device of turbine dish, can convenient to detach install the D type bolt on the turbine dish.

Some embodiments of the present disclosure provide a turbine disk D-bolt dismounting device for dismounting a bushing for mounting a D-bolt on a turbine disk, including:

the end ring of the drag hook is provided with a plurality of hook claws;

the sleeve is sleeved on the drag hook; and

a pulling mechanism configured to pull the draw hook to move in the sleeve;

wherein the retractor is configured to: the hook claw is opened outwards under the natural state; in a state where the fingers enter the sleeve, the fingers are contracted inward by the pressing action of the sleeve and hook the bush.

In some embodiments, the pulling mechanism comprises a screw rod and a compression nut, the compression nut is arranged on one side of the sleeve, which is far away from the hook claw, and is in threaded connection with the screw rod, and a first end of the screw rod is fixedly connected with the other end of the draw hook.

In some embodiments, the second end of the screw projects relative to the compression nut and is provided with a square boss.

In some embodiments, the pull hook further comprises an inner nut, the other end of the pull hook is provided with a threaded hole for installing the inner nut, and the first end of the screw rod is fixedly connected with the other end of the pull hook through the inner nut.

In some embodiments, the retractor comprises a retractor rod and a hook claw, the hook claw is arranged at one end of the retractor rod, and one end of the retractor rod is provided with a bolt avoiding hole for accommodating the D-shaped bolt.

In some embodiments, the fingers comprise L-shaped fingers.

In some embodiments, the fingers are chamfered near the edge of the bushing.

Based on above-mentioned technical scheme, this is disclosed through setting up drag hook, sleeve and pulling mechanism, gets into the sleeve and inwards shrink and hook the bush under telescopic squeezing action at the hook claw, utilizes pulling mechanism to apply the pulling force to the bush through the drag hook to dismantle the bush from the turbine dish, simple structure installs and removes the convenience, dismantles efficiently.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of a low pressure turbine disk assembly;

FIG. 2 is a schematic partial cross-sectional view of a low pressure turbine disk assembly;

FIG. 3 is an enlarged fragmentary view of a portion of FIG. 2;

FIG. 4 is an installation schematic of some embodiments of a D-bolt removal apparatus for a turbine disk according to the present disclosure;

FIG. 5 is a schematic view of an installation configuration of some embodiments of a D-bolt removal apparatus for a turbine disk according to the present disclosure;

FIG. 6 is a cross-sectional structural schematic view of some embodiments of a D-bolt take-down apparatus of a turbine disk according to the present disclosure;

FIG. 7 is a schematic overall structural view of some embodiments of a D-bolt removal apparatus for a turbine disk according to the present disclosure;

FIG. 8 is a schematic view of the overall structure of the retractor in some embodiments of the D-bolt removing apparatus for a turbine disk according to the present disclosure;

fig. 9 is a schematic cross-sectional view of a retractor in some embodiments of a D-bolt removal apparatus for a turbine disk according to the present disclosure.

Description of the reference numerals

1. A turbine disk; 2. a bushing; 3. a D-bolt; 4. a D-shaped bolt dismounting device of the turbine disc; 41. pulling a hook; 42. a sleeve; 43. a screw; 44. an inner nut; 45. a compression nut; 411. a hook claw; 412. a drawbar; 413. a bolt relief hole; 414. a threaded hole; 415. chamfering; 431. and (4) a square boss.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, the particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms used in the present disclosure have the same meaning as understood by one of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, devices, 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.

As shown in fig. 4 to 7, some embodiments of the present disclosure provide a D-bolt dismounting device 4 for a turbine disk, which is used for dismounting a bushing 2 of a D-bolt 3 mounted on a turbine disk 1, and comprises: the drawing hook 41, the sleeve 42 and the drawing mechanism, wherein one end of the drawing hook 41 is provided with a plurality of hook claws 411 in a ring mode; the sleeve 42 is sleeved on the draw hook 41; the pulling mechanism is configured to pull the draw hook 41 to move in the sleeve 42; wherein the draw hook 41 is configured to: the hook 411 is opened outward in a natural state; in a state where the hooks 411 enter the sleeve 42, the hooks 411 are contracted inward by the pressing action of the sleeve 42 and hook the bush 2.

In the illustrated embodiment, by providing the draw hook 41, the sleeve 42 and the pulling mechanism, when the hook claw 411 enters the sleeve 42 and is retracted inwards under the squeezing action of the sleeve 42 to hook the liner 2, the pulling mechanism applies a pulling force to the liner 2 through the draw hook 41, so that the liner 2 is detached from the turbine disc 1, and then the D-bolt 3 is detached from the turbine disc 1 after being inclined, the structure is simple, the detachment is convenient, and the detachment efficiency is high.

For one implementation of the pulling mechanism, in some embodiments, as shown in fig. 6 and 7, the pulling mechanism includes a screw 43 and a compression nut 45, the compression nut 45 is disposed on a side of the sleeve 42 away from the hook 411 and is in threaded connection with the screw 43, and a first end of the screw 43 is fixedly connected with the other end of the draw hook 41. By turning the compression nut 45, the turning of the compression nut 45 is converted into the movement of the screw 43, and the screw 43 applies a pulling force to the liner 2 through the draw hook 41, thereby detaching the liner 2 from the turbine disk 1. The rotation of the gland nut 45 is easy to realize, and the pulling stability and reliability are high.

In order to prevent the screw 43 from rotating when the compression nut 45 is rotated, in some embodiments, the second end of the screw 43 protrudes relative to the compression nut 45 and is provided with a square boss 431, and the rotation of the screw 43 can be limited by using a wrench to act on the square boss 431, so that the method is easy to implement and has high reliability and stability.

As to how to fixedly connect the first end of the screw 43 to the other end of the pull hook 41, as shown in fig. 6 and 9, in some embodiments, the turbine disc D-shaped bolt detaching device 4 further includes an inner nut 44, the other end of the pull hook 41 is provided with a threaded hole 414 for installing the inner nut 44, the first end of the screw 43 is fixedly connected to the other end of the pull hook 41 through the inner nut 44, and the fixed connection stability is high and the practicability is high.

In order to prevent the draw hook 41 from damaging the D-bolt 3 when the bushing is disassembled, as shown in fig. 5, 6 and 9, in some embodiments, the draw hook 41 includes a draw hook rod 412 and a hook claw 411, the hook claw 411 is disposed at one end of the draw hook rod 412, and one end of the draw hook rod 412 is provided with a bolt avoiding hole 413 for receiving the D-bolt 3.

As shown in fig. 8 and 9, in some embodiments, the hooking jaw 411 includes an L-shaped hooking jaw in order to stably and reliably hook the bush 2. In some embodiments, the fingers 411 are provided with chamfers 415 near the edges of the liner 2 to facilitate placement of the fingers 411 under the annular table of the liner 2.

The following describes the process of removing the bushing and the D-bolt by using the D-bolt removing device for a turbine disk according to the present disclosure as an example in fig. 4 to 9:

(1) as shown in fig. 4, the drag hook 41, the screw 43 and the inner nut 44 are assembled together, and then the drag hook 41 is installed on the turbine disc 1 and sleeved on the D-shaped bolt 3, and the claw 411 of the drag hook 41 is located below the annular table of the bushing 2;

(2) mounting the sleeve 42 on the draw hook 41, mounting the compression nut 45 on the screw 43, and pressing the sleeve 42;

(3) the screw 43 is held by a wrench through the square boss, the compression nut 45 is screwed by another wrench, so that the sleeve 42 moves downwards, the hook claws 411 are extruded and contracted inwards, and the hook claws 411 hook the annular table of the bush 2;

(4) after the lower end face of the sleeve 42 contacts the turbine disc 1, the gland nut 45 is continuously screwed, the screw 43 drives the draw hook 41 to move upwards, so that the bush 2 is slowly pulled out, then the gland nut 45 is unscrewed, the sleeve 42 is pulled upwards relative to the draw hook 41, the claw 411 is naturally opened, and the bush 2 is taken down;

(5) after the bush 2 is pulled out, the D-bolt 3 is inclined and detached from the turbine disk 1.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (7)

1. A D-bolt dismounting device (4) for a turbine disc (1) is used for dismounting a bushing (2) for mounting a D-bolt (3), and is characterized by comprising:

a drag hook (41) with one end ring provided with a plurality of hook claws (411);

the sleeve (42) is sleeved on the draw hook (41); and

a pulling mechanism configured to pull the draw hook (41) to move within the sleeve (42);

wherein the draw hook (41) is configured to: the claw (411) is opened outwards in a natural state; in a state where the fingers (411) enter the sleeve (42), the fingers (411) are contracted inward by the pressing action of the sleeve (42) and hook the bush (2).

2. The D-shaped bolt dismounting device for the turbine disc is characterized in that the pulling mechanism comprises a screw rod (43) and a compression nut (45), the compression nut (45) is arranged on one side, away from the hook claw (411), of the sleeve (42) and is in threaded connection with the screw rod (43), and a first end of the screw rod (43) is fixedly connected with the other end of the draw hook (41).

3. The D-bolt dismounting device of a turbine disc according to claim 2, characterized in that the second end of the screw (43) is convex with respect to the compression nut (45) and is provided with a square boss (431).

4. The D-shaped bolt dismounting device for the turbine disc is characterized by further comprising an inner nut (44), the other end of the draw hook (41) is provided with a threaded hole (414) for mounting the inner nut (44), and the first end of the screw rod (43) is fixedly connected with the other end of the draw hook (41) through the inner nut (44).

5. The D-shaped bolt dismounting device of the turbine disc is characterized in that the draw hook (41) comprises a draw hook rod (412) and a hook claw (411), the hook claw (411) is arranged at one end of the draw hook rod (412), and a bolt avoiding hole (413) used for accommodating the D-shaped bolt (3) is formed in the one end of the draw hook rod (412).

6. The D-bolt removing device for a turbine disc as claimed in claim 1, wherein the hook (411) comprises an L-shaped hook.

7. The D-bolt dismounting device of a turbine disc according to claim 1, characterized in that the hook claw (411) is provided with a chamfer (415) near the edge of the bushing (2).

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