CN116081451A - Gas turbine rotor disk lifting device - Google Patents

Abstract

The invention relates to the technical field of gas turbine overhaul, in particular to a gas turbine rotor disk hoisting tool, which comprises: the annular bracket is provided with an annular guide rail; the ring gear is movably connected to the ring guide rail along the circumferential direction; the gears are arranged on the tooth surface of the ring gear at intervals and are meshed with the ring gear; the plurality of screw rods penetrate through the annular support in the radial direction and are connected with the plurality of gears in a one-to-one correspondence manner; the lifting claws are in threaded connection with the screw rods in a one-to-one correspondence manner; according to the technical scheme, a single person can rotate one screw rod, the screw rod drives the gear to rotate, then the ring gear is driven to rotate on the annular guide rail, then other gears are driven to rotate, and other screw rods are driven to synchronously rotate, so that lifting claws in all directions simultaneously screw in or screw out, the lifting efficiency is greatly improved, and the concentricity of a wheel disc to be lifted and a lifting tool during lifting is ensured; the safety of the hoisting process is ensured.

Description

Gas turbine rotor disk lifting device

Technical Field

The invention relates to the technical field of gas turbine overhaul, in particular to a hoisting tool for a rotor disc of a gas turbine.

Background

The wheel discs of each stage of the gas turbine rotor are generally fixed together through pull rod bolts, when the rotor is disassembled, overhauled and assembled, the wheel discs of each stage need to be sequentially lifted out, and after the wheel discs of each stage are inspected, eliminated or replaced, the wheel discs of each stage need to be sequentially lifted, and are fixed and fastened through the pull rod bolts. Therefore, the hoisting of each stage of wheel discs is one of main work of disassembly and overhaul and assembly of the gas turbine rotor, and the hoisting efficiency and the hoisting safety have direct and great influence on the whole overhaul work.

As a core tool in the whole hoisting process, the wheel disc hoisting tool directly affects the efficiency and the safety of hoisting work. For the disassembly and assembly process of the central pull rod bolt rotor, the whole rotor is generally required to be axially erected on a rotor inspection bench, a wheel disc hoisting tool is hoisted by a travelling crane lifting hook, and all stages of turbine wheel discs and compressor wheel discs are hoisted from a turbine end and placed on the wheel disc inspection bench. When the traditional hoisting tool is used for hoisting, at least 3 persons are required to cooperate, and the 3 persons can respectively adjust the distance between the 3 lifting claws with 120-degree circumferential included angles in the diameter direction of the wheel disc and repeatedly confirm whether the lifting claws are firmly hoisted or not, so that the preparation work before hoisting can be completed. In the 3-person matching process, the lifting claw and the wheel disc are not matched well due to negligence of work of a certain person, so that potential safety hazards are buried in the lifting process.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defects of low efficiency and potential safety hazard when the wheel disc is lifted by the lifting claw of the traditional lifting tool in the prior art, and based on the situations, the lifting tool for the high-efficiency and safe lifting wheel disc is very necessary to develop.

In order to achieve the above object, the present invention provides a gas turbine rotor disk lifting tool, comprising:

the annular bracket is provided with an annular guide rail;

the ring gear is movably connected to the ring guide rail along the circumferential direction;

the gears are arranged on the tooth surface of the ring gear at intervals and are meshed with the ring gear;

the plurality of screw rods penetrate through the annular support in the radial direction and are connected with the plurality of gears in a one-to-one correspondence manner;

and the lifting claws are in one-to-one correspondence with the screw rods and are in threaded connection with the screw rods.

Optionally, the method further comprises:

the installation frame is arranged on the annular support, guide grooves are formed in the radial direction of the annular support, and the screw rod penetrates through the annular support and penetrates through the end wall of the installation frame.

Optionally, one end of the hanging claw connected with the screw is arranged in the guide groove.

Optionally, a scale for indicating the radial position of the lifting claw is arranged on the mounting frame.

Optionally, the cross sections of the annular guide rails contacted with the annular gears are all V-shaped.

Optionally, a roller is provided on the surface of the ring gear contacting the ring rail.

Optionally, a rotating handle is arranged at one end of the screw rod extending out of the annular support.

Optionally, the ring support is a hollow structure, and the ring gear and the gear are both located in the hollow structure.

Optionally, the method further comprises:

lifting lugs arranged on the outer circumference of the annular bracket.

Optionally, a pressure sensor is arranged at the contact position of the lifting claw and the wheel disc to be lifted; the pressure sensor is connected with the display module.

Compared with the prior art, the technical scheme of the invention has the following advantages:

1. the invention provides a gas turbine rotor disk hoisting tool, which comprises: the annular bracket is provided with an annular guide rail; the ring gear is movably connected to the ring guide rail along the circumferential direction; the gears are arranged on the tooth surface of the ring gear at intervals and are meshed with the ring gear; the plurality of screw rods penetrate through the annular support in the radial direction and are connected with the plurality of gears in a one-to-one correspondence manner; the lifting claws are in one-to-one correspondence with the screw rods and are in threaded connection with the screw rods; according to the technical scheme, a single person can rotate one screw rod, the screw rod drives the gear to rotate, then the ring gear is driven to rotate on the annular guide rail, then other gears are driven to rotate, and then other screw rods are driven to synchronously rotate, so that lifting claws in all directions simultaneously screw in or screw out, the lifting efficiency is greatly improved, and the concentricity of a wheel disc to be lifted and a lifting tool during lifting is ensured; meanwhile, after one screw or gear fails, the normal use of the whole hoisting tool can be ensured by operating other screws and gears, so that the hoisting process safety is ensured.

2. The invention provides a gas turbine rotor disc lifting tool, which further comprises: the installation frame is arranged on the annular support, a guide groove is formed in the radial direction of the annular support, and the screw rod penetrates through the annular support and penetrates through the end wall of the installation frame; the application adopts above-mentioned technical scheme, through setting up the mounting bracket, makes the screw rod fix the tip at the mounting bracket and rotate, increases screw rod pivoted stability.

3. One end of the lifting claw connected with the screw rod is arranged in the guide groove; by adopting the technical scheme, the lifting claw slides in the guide groove, and the radial screwing-in or screwing-out of the lifting claw is reliably ensured.

4. The invention is provided with a scale for marking the radial position of the lifting claw on the mounting frame; by adopting the technical scheme, the radial position of the lifting claw required to be arranged when the wheel discs with different diameters are lifted can be rapidly determined.

5. The cross sections of the annular guide rail and the annular gear are V-shaped; by adopting the technical scheme, the positioning accuracy of the ring gear during rotation on the annular guide rail is improved.

6. The invention is provided with rollers on the surface of the ring gear, which is contacted with the ring guide rail; by adopting the technical scheme, the friction force between the ring gear and the annular guide rail is reduced, and the rotation of the ring gear on the annular guide rail is more flexible.

7. One end of the screw rod extending out of the annular bracket is provided with a rotating handle; the application adopts above-mentioned technical scheme, through setting up twist grip, the convenience rotates the screw rod.

8. The annular support is of a hollow structure, and the annular gear and the gear are both positioned in the hollow structure; by adopting the technical scheme, the annular bracket is arranged to be of a hollow structure, so that the dead weight of the hoisting tool can be greatly reduced; and the ring gear and the gear can be arranged in the ring bracket, so that the ring gear and the gear are protected, and the transmission precision and the durability are improved.

9. The invention provides a gas turbine rotor disc lifting tool, which further comprises: lifting lugs arranged on the outer circumference of the annular bracket; by adopting the technical scheme, the convenience of operation in the hoisting process is improved, and the hoisting tool is conveniently hung on the lifting hook through the lifting lug.

10. The invention is provided with a pressure sensor at the contact position of the lifting claw and the wheel disc to be lifted; the pressure sensor is connected with the display module; by means of the technical scheme, the monitoring of the hoisting condition of the radial position of each lifting claw during hoisting is further enhanced through measuring the pressure between the lifting claw and the wheel disc to be hoisted and displaying.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a lifting tool for a rotor disk of a gas turbine according to an embodiment of the present invention;

FIG. 2 is a schematic view of a partial perspective view of a lifting tool for a rotor disk of a gas turbine according to an embodiment of the present invention;

FIG. 3 is a schematic diagram showing a second perspective structure of a lifting tool for a rotor disk of a gas turbine according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a partial perspective view of a lifting tool for a rotor disk of a gas turbine according to an embodiment of the present invention.

Reference numerals illustrate:

1. an annular bracket; 2. a ring gear; 3. an annular guide rail; 4. a screw; 5. a mounting frame; 6. a hanging claw; 7. a gear; 8. lifting lugs; 9. and a roller.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

A specific embodiment of a gas turbine rotor disk lifting tool as shown in fig. 1-4 for safe and efficient lifting, comprising: the annular support 1 provided with the annular guide rail 3, the annular gear 2 which is circumferentially movably connected to the annular guide rail 3, six gears 7 which are uniformly distributed on the tooth surface of the annular gear 2 at intervals, six mounting frames 5 which are uniformly distributed on the annular support 1, six screw rods 4 which are radially penetrated and arranged along the annular support 1, six lifting claws 6 which are respectively in one-to-one correspondence with the six screw rods 4 and are in threaded connection with the six screw rods, and three lifting lugs 8 which are uniformly distributed on the outer circumference of the annular support 1.

As shown in fig. 1 and 2, each of the six gears 7 is meshed with the ring gear 2, and in particular, the ring gear 2 is a bevel gear; six screws 4 are connected with six gears 7 in a one-to-one correspondence, and the screws 4 and the gears 7 are coaxially arranged. The mounting frame 5 is provided with a guide groove along the radial direction of the annular bracket 1, and the guide groove is a linear guide groove; specifically, the mounting frame 5 is fixedly connected with the inner circumferential wall surface of the annular bracket 1 in a fusion welding mode.

The inner end of the screw 4 passes through the annular bracket 1 and penetrates through the end wall of the mounting frame 5; the outer end of the screw 4 extending out of the annular bracket 1 is provided with a rotating handle. Further, the screw 4 is provided with annular convex joints for limiting and sealing at the contact position with the inner surface and the outer surface of the circumferential wall surface of the annular bracket 1, so that the rigidity, the positioning accuracy and the axial force bearing capacity of the screw 4 are further improved. The screw 4 is in a transmission screw form, can transmit large axial force and can be self-locked in the transmission direction.

The end of the hanging claw 6 connected with the screw 4 is arranged in the guide groove and can slide in the guide groove. The processing depth of the guide groove is as large as possible, and the reinforcing ribs can be added on the outer wall of the guide groove under the condition of allowing, so that the deformation which is enough to influence the assembly precision of the lifting claw 6 is avoided during lifting. The radial position of the lifting claw 6 should be within a range that covers the minimum radial lifting dimension and the maximum radial lifting dimension of the wheel disc to be lifted.

A scale for indicating the radial position of the lifting claw 6 is arranged on the mounting frame 5. The appearance of the matching part of the lifting claw 6 and the wheel disc to be lifted is matched with the appearance of the lifting part of the wheel disc to be lifted; the lifting claw 6 is approximately L-shaped, and for the central pull rod bolt rotor wheel disc, the outer end of the L-shaped transverse part points to the outer circle direction of the wheel disc, namely, the outer end of the transverse part deviates from the center of the annular bracket 1 and points to the outer side; for a circumferential tie bolt rotor disc, the outer end of the "L" -shaped transverse portion points in the direction of the centre of the disc, i.e. towards the centre of the toroidal support 1, towards the inside.

Further, the number of the lifting claws 6 is not less than six, and the number of the lifting lugs 8 is not less than three. Specifically, the appearance of lug 8 can be semi-circular, is equipped with in semicircular center and hangs the ear hole, and the surface intersection angle department of lug hole and lug 8 sets up the radius to the stress concentration of this position department when reducing to lift by crane improves the durability of lug 8, guarantees to lift by crane the safety. Further, in order to simplify the manufacturing process, the lifting lugs 8 are connected with the annular support 1 in an integrally formed manner, so that the rigidity of the annular support 1 is improved, the deformation of the annular support 1 during lifting is reduced, and the phenomenon that the wheel disc falls due to the fact that the relative positions of the lifting claws 6 and the wheel disc are changed due to overlarge deformation of the annular support 1 is prevented.

The annular support 1 is of a hollow structure, and the annular gear 2 and the gear 7 are both positioned in the hollow structure. Specifically, the cross section of the annular support 1 is rectangular hollow, and the annular guide rail 3 is arranged in the hollow structure. Further, the annular guide rail 3 is integrally connected with the inner side of the lower surface of the annular support 1, so that the structural complexity of the annular support 1 can be simplified, the manufacturing consistency of the annular guide rail 3 and the annular support 1 is further improved, and compared with the mode of bolting, the annular support 1 is higher in overall rigidity and smaller in weight. The lower wall surface and the two side circumferential wall surfaces of the annular support 1 are integrally formed, and the upper wall surface is matched with the integrally formed part to form a closed inner cavity, so that dust, oil stains and the like outside are prevented from entering the inner cavity, and the transmission flexibility and the accuracy of the annular guide rail 3 are influenced. Sealing rings and the like can be additionally arranged at the matched parts of the upper wall surface and the integrally formed part, so that the dustproof, waterproof and greasy dirt-proof capacities of the annular guide rail 3 are further improved. A pressure sensor is arranged at the contact position of the lifting claw 6 and the wheel disc to be lifted; the pressure sensor is connected with a display module, and specifically, the display module is a display.

As shown in fig. 3 and 4, the cross section of the ring rail 3 contacting the ring gear 2 is V-shaped, and the surface of the ring gear 2 contacting the ring rail 3 is provided with rollers 9. Specifically, the rollers 9 are multiple groups, each group of rollers 9 comprises two rollers 9, and the two rollers 9 are respectively contacted with two sides of the V-shaped surface; further, the wheel spacing of each group of rollers 9 can be independently adjusted, so that the bevel gears can flexibly rotate and the positioning accuracy can be ensured. The V-shaped surfaces may be provided as double V-shaped surfaces, i.e. two V-shaped surfaces side by side, to further improve the transmission accuracy and durability.

The application of the lifting tool is briefly described as follows: and the lifting lug 8 of the lifting tool is hooked by a lifting hook of a crane or a crane, and the lifting tool is lifted to be right above the wheel disc to be lifted, and slowly falls down until the matching position of the lifting claw 6 and the wheel disc is at the same height position. Through the turning handle outside the rotating screw 4, the lifting claw 6 moves along the radial direction, meanwhile, the rotation of the screw 4 drives the ring gear 2 matched with the screw through the gear 7 on the screw, the ring gear 2 generates circumferential rotation motion along the ring guide rail 3, and the corresponding screw 4 is driven to synchronously rotate through the gears 7 in other five directions, so that the lifting claws 6 in other five directions synchronously move along the radial direction, and synchronous radial motion of the lifting claws 6 in six directions is realized. Through the radial position scale of lifting claw 6, with the radial position fast adjustment of lifting claw 6 to with wait to hoist the rim plate and cooperate well, through confirm the back again to screw rod 4 to and through pressure sensor and display module, confirm that lifting claw 6 and wait to hoist the rim plate and cooperate well after, slowly hoist the rim plate.

As an alternative embodiment, the lifting lug 8 is replaced by a lifting ring.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.

Claims (10)

1. A gas turbine rotor disk lifting tool, comprising:

the annular bracket (1) is provided with an annular guide rail (3);

the ring gear (2) is movably connected to the ring guide rail (3) along the circumferential direction;

a plurality of gears (7) which are arranged on the tooth surface of the ring gear (2) at intervals and are meshed with the ring gear (2);

the plurality of screw rods (4) penetrate through the annular support (1) along the radial direction and are connected with the plurality of gears (7) in a one-to-one correspondence manner;

and the lifting claws (6) are in one-to-one correspondence with the screw rods (4) and are in threaded connection.

2. The gas turbine rotor disc lifting tool of claim 1, further comprising:

the installation frame (5) is arranged on the annular support (1), guide grooves are formed in the radial direction of the annular support (1), and the screw (4) penetrates through the annular support (1) and penetrates through the end wall of the installation frame (5).

3. The gas turbine rotor disc lifting tool according to claim 2, wherein the end of the lifting claw (6) connected with the screw (4) is arranged in the guide groove.

4. Gas turbine rotor disc lifting tool according to claim 2, characterized in that a scale indicating the radial position of the lifting claw (6) is provided on the mounting frame (5).

5. Gas turbine rotor disc lifting tool according to claim 1, characterized in that the cross sections of the annular guide rail (3) in contact with the ring gear (2) are V-shaped.

6. The tool of claim 5, wherein rollers (9) are provided on the surface of the ring gear (2) contacting the annular rail (3).

7. Gas turbine rotor disc lifting tool according to any of claims 1-6, characterized in that the end of the screw (4) extending out of the ring support (1) is provided with a turning handle.

8. Gas turbine rotor disc lifting tool according to any of claims 1-6, characterized in that the ring support (1) is of hollow construction, and that the ring gear (2) and the gear (7) are both located in the hollow construction.

9. The gas turbine rotor disc lifting tool of any one of claims 1-6, further comprising:

lifting lugs (8) arranged on the outer circumference of the annular bracket (1).

10. Gas turbine rotor disc lifting tool according to any of claims 1-6, characterized in that a pressure sensor is provided at the position where the lifting claw (6) is in contact with the disc to be lifted; the pressure sensor is connected with the display module.

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