CN220094471U - Blade pulling mechanism and fixing device - Google Patents

Abstract

The utility model relates to the technical field of maintenance of turbine blades and discloses a blade pulling mechanism and a fixing device, wherein the blade pulling mechanism comprises a beam unit, a blade unit and a blade unit, wherein the beam unit comprises a beam, a limiting column and a threaded hole; the pulling-out unit comprises a pulling-out assembly and a clamping assembly; and an adjusting unit including a telescopic rod and a fixing ring. The utility model has the beneficial effects that the blade is radially pulled out by clamping the shroud ring at the tip of the blade, and the blade is protected by the overload spring, so that the blade is not damaged, the time and strength of workers are saved, and the maintenance cost is reduced; in addition, the tool is fixed on the rotor shaft by the design, so that a worker can pull out the blades radially by force.

Description

Blade pulling mechanism and fixing device

Technical Field

The utility model relates to the technical field of maintenance of turbine blades, in particular to a blade pulling mechanism and a fixing device.

Background

Steam turbines are important equipment widely used in the energy field, and one of the key components is a blade. The design and performance of the blades plays a critical role in the efficiency and reliability of the turbine. However, due to long term operation and high temperature and pressure environments, the blade may experience wear, cracking or other damage conditions that require repair or replacement.

Over the past several decades, various blade extraction techniques have been proposed by some turbine manufacturers and repair companies. One common method is to use specially designed blade pulling tools to pull out the blade mechanically or hydraulically. However, this method has some problems in practical application. First, due to the variety of shapes and locations of turbine blades, conventional blade pulling tools may not be able to accommodate the pulling requirements of various blades.

When the turbine body is overhauled, the turbine rotor blade is inspected, when the rotor blade is found to have a large defect, the blade is required to be pulled out for replacement or overhauling, because the turbine rotor blade is large and is complex to assemble, if a special tool is not used for carrying out protective dismantling on the blade, irreversible damage can be caused on the blade, the blade is required to be pulled out by the special tool, and a blade pulling mechanism and a fixing device are needed to solve the problems.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model.

The present utility model has been made in view of the above-mentioned problems of the prior art that the rotor blades of the steam turbine are often damaged when they are pulled out, and the cost is increased.

In order to solve the technical problems, the utility model provides the following technical scheme: the blade pulling mechanism comprises a beam unit, a limiting column and a threaded hole, wherein the limiting column is arranged at the lower part of the beam;

the pulling-out unit comprises a pulling-out assembly arranged below the cross beam and a clamping assembly arranged below the pulling-out assembly.

As a preferred embodiment of the blade pulling mechanism of the present utility model, wherein: the limit column comprises a sliding groove arranged on the side wall of the limit column and a limit groove arranged inside the sliding groove.

As a preferred embodiment of the blade pulling mechanism of the present utility model, wherein: the pulling-out assembly comprises a screw rod penetrating through the middle of the cross beam and a push-pull piece arranged at the lower part of the screw rod.

As a preferred embodiment of the blade pulling mechanism of the present utility model, wherein: the screw rod comprises a knob arranged at the top of the screw rod and a clamping head arranged at the bottom of the screw rod.

As a preferred embodiment of the blade pulling mechanism of the present utility model, wherein: the push-pull piece comprises a clamping groove arranged at the top of the push-pull piece, lug holes symmetrically arranged at the lower part of the side wall of the push-pull piece, and a containing groove penetrating through the lower part of the side wall of the push-pull piece.

As a preferred embodiment of the blade pulling mechanism of the present utility model, wherein: the clamping assembly comprises clamping arms symmetrically arranged on two sides of the push-pull piece, sliding blocks arranged on two sides of the clamping arms, springs arranged above the sliding blocks, and hinge posts arranged at the ends of the clamping arms.

As a preferred embodiment of the blade pulling mechanism of the present utility model, wherein: the clamping arm comprises a key slot arranged at the upper part of the clamping arm, and a clamping jaw arranged at the lower part of the clamping arm.

As a preferred embodiment of the blade pulling mechanism of the present utility model, wherein: the sliding block comprises limit strips symmetrically arranged on the side walls of the sliding block.

The blade pulling mechanism has the beneficial effects that: according to the design, the shroud ring at the tip of the blade is clamped, the blade is radially pulled out, the overload spring is protected, the blade cannot be damaged, the time and strength of workers are saved, and the overhaul cost is reduced.

In view of the problem that the rotor cannot be fixed by the blade pulling mechanism, the fixing device is provided.

In order to solve the technical problems, the utility model also provides the following technical scheme: the fixing device comprises an adjusting unit, a telescopic rod and a fixing ring, wherein the telescopic rod is arranged at the lower part of two ends of the cross beam, and the fixing ring is arranged at the lower part of the telescopic rod.

As a preferred embodiment of the fixing device according to the utility model, wherein: the telescopic rod comprises a sleeve rod arranged at the lower part of the cross beam, a sleeve arranged at the lower part of the sleeve rod and a spring bead arranged on the side wall of the sleeve;

the fixed ring comprises a first lantern ring arranged at the lower part of the sleeve and a second lantern ring arranged below the first lantern ring.

The fixing device has the beneficial effects that: the design fixes the tool on the rotor shaft, and is convenient for workers to pull out the blades radially.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is an overall schematic view of a blade pulling mechanism in the present utility model.

Fig. 2 is a schematic structural view of a beam unit in the present utility model.

Fig. 3 is a schematic structural view of the extracting unit in the present utility model.

Fig. 4 is a schematic structural view of the fixing device in the present utility model.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 3, in a first embodiment of the present utility model, there is provided a blade pulling mechanism, which includes a beam unit 100 including a beam 101, a limit post 102 disposed at a lower portion of the beam 101, and a threaded hole 103 penetrating a middle portion of the beam 101;

the extraction unit 200 includes an extraction assembly 201 disposed below the cross beam 101, and a clamping assembly 202 disposed below the extraction assembly 201.

Further, the limiting post 102 includes a sliding groove 102a disposed on a sidewall thereof, and a limiting groove 102b disposed inside the sliding groove 102 a.

Further, the drawing assembly 201 includes a screw 201a penetrating through the middle of the cross member 101, and a push-pull member 201b disposed at the lower portion of the screw 201 a.

Further, the screw 201a includes a knob 201a-1 provided at the top thereof, and a chuck 201a-2 provided at the bottom of the screw 201 a.

The cross beam 101 is made of a rigid material, and can bear the force required by pulling out the blade, and the screw hole 103 arranged in the middle of the cross beam 101 can rotate the screw rod 201a to drive the push-pull piece 201b to move, so that the blade pulling-out operation is performed.

Preferably, the lower part of the cross beam is fixedly connected with a limit post 102, the limit posts 102 are symmetrically arranged, sliding grooves 102a are formed in the opposite inner sides of the limit posts, and limit grooves 102b are formed in the sliding grooves 102 a.

Preferably, the screw rod 201a penetrates through the threaded hole 103, the top of the screw rod 201a is fixedly connected with the knob 201a-1, the screw rod 201a can be rotated, the bottom of the screw rod 201a is fixedly connected with the clamping head 201a-2, the screw rod 201a can extend into the push-pull piece 201b through the clamping head 201a-2, the screw rod 201a can not drive the push-pull piece 201b to rotate when rotated, and the screw rod 201a can drive the push-pull piece 201b to move up and down when moved up and down.

To sum up, this design is radial laborsaving structure of pulling out the blade, drives the push-and-pull piece through the rotation of lead screw and removes, slowly pulls out the blade, can not damage the blade because of too soon.

Example 2

Referring to fig. 1-3, a second embodiment of the present utility model is further provided with a blade pulling mechanism. The device comprises a beam unit 100, a beam unit and a control unit, wherein the beam unit comprises a beam 101, a limit column 102 arranged at the lower part of the beam 101 and a threaded hole 103 penetrating through the middle of the beam 101;

the extraction unit 200 includes an extraction assembly 201 disposed below the cross beam 101, and a clamping assembly 202 disposed below the extraction assembly 201.

Further, the limiting post 102 includes a sliding groove 102a disposed on a sidewall thereof, and a limiting groove 102b disposed inside the sliding groove 102 a.

Further, the drawing assembly 201 includes a screw 201a penetrating through the middle of the cross member 101, and a push-pull member 201b disposed at the lower portion of the screw 201 a.

Further, the screw 201a includes a knob 201a-1 provided at the top thereof, and a chuck 201a-2 provided at the bottom of the screw 201 a.

Further, the push-pull member 201b includes a clamping groove 201b-1 disposed at the top thereof, an ear hole 201b-2 symmetrically disposed at the lower portion of the sidewall of the push-pull member 201b, and a receiving groove 201b-3 penetrating the lower portion of the sidewall of the push-pull member 201b.

Further, the clamping assembly 202 includes clamping arms 202a symmetrically disposed on both sides of the push-pull member 201b, sliding blocks 202b disposed on both sides of the clamping arms 202a, springs 202c disposed above the sliding blocks 202b, and hinge posts 202d disposed at ends of the clamping arms 202 a.

Further, the clamp arm 202a includes a key slot 202a-1 provided at an upper portion thereof, and a clamping jaw 202a-2 provided at a lower portion of the clamp arm 202 a.

Further, the slider 202b includes a limit bar 202b-1 symmetrically disposed on a sidewall thereof.

The cross beam 101 is made of a rigid material, and can bear the force required by pulling out the blade, and the screw hole 103 arranged in the middle of the cross beam 101 can rotate the screw rod 201a to drive the push-pull piece 201b to move, so that the blade pulling-out operation is performed.

Preferably, the lower part of the cross beam is fixedly connected with a limit post 102, the limit posts 102 are symmetrically arranged, sliding grooves 102a are formed in the opposite inner sides of the limit posts, and limit grooves 102b are formed in the sliding grooves 102 a.

Preferably, the screw rod 201a penetrates through the threaded hole 103, the top of the screw rod 201a is fixedly connected with the knob 201a-1, the screw rod 201a can be rotated, the bottom of the screw rod 201a is fixedly connected with the clamping head 201a-2, the screw rod 201a can extend into the push-pull piece 201b through the clamping head 201a-2, the screw rod 201a can not drive the push-pull piece 201b to rotate when rotated, and the screw rod 201a can drive the push-pull piece 201b to move up and down when moved up and down.

Preferably, the upper surface of the push-pull member 201b has a clamping groove 201b-1 which is matched with the clamping head 201a-2, and when the screw rod 201a is rotated and lowered, the push-pull member 201b can be pushed to move up and down, but cannot rotate.

Preferably, the lower side wall of the push-pull member 201b is fixedly connected with the ear hole 201b-2, the ear hole 201b-2 is symmetrically arranged, and the hinge point can move inside the key slot 202a-1 by hinging the hinge post 202d with the key slot 202a-1 at the top of the clamping arm 202a, and the side wall of the push-pull member 201b is penetrated and provided with the accommodating groove 201b-3 for the clamping arm 202a to penetrate.

Preferably, the corner of the clamping arm 202a is also provided with a hinge hole, which can be hinged with the hole on the sliding block 202b, and is used as an important pivot point for clamping the clamping assembly 202.

Preferably, the slider 202b moves inside the sliding groove 102a, and the slider 202b is restricted in the limiting groove 102b due to the limiting bar 202b-1 on the side wall of the slider 202b, preventing the slider 202b from falling out.

Preferably, the top of the sliding block is provided with a spring 202c, the bottom of the spring 202c is connected with a sliding block 202b, the top of the spring is connected to the top of the sliding groove 102a, and the sliding block 202b can press the spring 202c when moving upwards.

Preferably, the lower portion of the clamping arm 202a is fixedly connected with the hook-type clamping jaw 202a-2, and other parts which are suitable for pulling out are also adopted, and the clamping jaw 202a-2 can clamp the shroud of the blade tip to prevent the blade from being damaged.

When the blade pulling device is used, the knob 201a-1 is rotated, the screw rod 201a moves downwards to push the push-pull piece 201b to move downwards, the clamping arm 202a is hinged with the push-pull piece 201b, the middle corner of the clamping arm 202a is hinged with the sliding block, the clamping jaw 202a-2 can be opened to place the clamping jaw 202a-2 at the shroud of the blade, the screw rod 201a moves upwards, the clamping jaw 202a-2 is slowly clamped, after the blade pulling device is completely clamped, the screw rod 201a continues to move upwards to push the sliding block 202b to move upwards, and the clamping arm continues to apply a clamping force to the blade due to the fact that the spring 202c is extruded with opposite force, so that the blade pulling device is prevented from falling off in the process of pulling the blade.

In conclusion, through radial extraction mechanism, the design saves the effort of staff, and pulls out the in-process of blade and remain clamping state throughout to the shroud ring at blade tip, can not cause the damage to blade itself, reduces staff's maintenance cost.

Example 3

Referring to fig. 4, a third embodiment of the present utility model is a fixing device, which is different from the previous two embodiments in that the fixing device includes an adjusting unit 300 including a telescopic rod 301 disposed at both lower ends of a cross beam 101 and a fixing ring 302 disposed at the lower portion of the telescopic rod 301.

Further, the telescopic rod 301 includes a sleeve rod 301a disposed at the lower portion of the cross beam 101, a sleeve 301b disposed at the lower portion of the sleeve rod 301a, and a spring bead 301c disposed on the sidewall of the sleeve 301 b;

the fixing ring 302 includes a first collar 302a disposed at a lower portion of the sleeve 301b, and a second collar 302b disposed below the first collar 302 a.

It should be noted that, the loop bars 301a at two ends of the cross beam 101 are fixedly connected to the bottom of the cross beam 101, but the sleeve 201b is movably connected to the loop bars 301a, and the positions of the sleeve 301b and the loop bars 301a are relatively fixed by the spring beads 301c, so as to be suitable for rotor blades with different diameters.

Preferably, the bottom of the sleeve 301b is fixedly connected with the fixing ring 302, the fixing ring 302 is divided into two parts, the first collar 302a is fixedly connected to the bottom of the sleeve 301b, the second collar 302b is connected to one end of the first collar 302a through a hinge, and the two collars are fixed through bolts after being combined into a circular ring. The fixing ring 302 can be fixed on the rotor shaft to fix the position of the blade pulling mechanism and can assist the radial blade pulling.

It is important to note that the construction and arrangement of the utility model as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in order to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the utility model, or those not associated with practicing the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (10)

1. The utility model provides a pull out blade mechanism which characterized in that: the device comprises a beam unit (100), a beam unit and a control unit, wherein the beam unit comprises a beam (101), a limit column (102) arranged at the lower part of the beam (101) and a threaded hole (103) penetrating through the middle of the beam (101);

the pulling-out unit (200) comprises a pulling-out assembly (201) arranged below the cross beam (101) and a clamping assembly (202) arranged below the pulling-out assembly (201).

2. The blade extraction mechanism of claim 1, wherein: the limit column (102) comprises a sliding groove (102 a) arranged on the side wall of the limit column, and a limit groove (102 b) arranged inside the sliding groove (102 a).

3. The blade extraction mechanism of claim 2, wherein: the pulling-out assembly (201) comprises a screw rod (201 a) penetrating through the middle of the cross beam (101), and a push-pull piece (201 b) arranged at the lower part of the screw rod (201 a).

4. A blade extraction mechanism as claimed in claim 3, wherein: the screw rod (201 a) comprises a knob (201 a-1) arranged at the top of the screw rod, and a clamping head (201 a-2) arranged at the bottom of the screw rod (201 a).

5. The blade pulling mechanism of claim 3 or 4, wherein: the push-pull piece (201 b) comprises a clamping groove (201 b-1) arranged at the top of the push-pull piece, lug holes (201 b-2) symmetrically arranged at the lower part of the side wall of the push-pull piece (201 b), and a containing groove (201 b-3) penetrating through the lower part of the side wall of the push-pull piece (201 b).

6. The blade pulling mechanism of claim 5, wherein: the clamping assembly (202) comprises clamping arms (202 a) symmetrically arranged on two sides of the push-pull piece (201 b), sliding blocks (202 b) arranged on two sides of the clamping arms (202 a), springs (202 c) arranged above the sliding blocks (202 b), and hinge columns (202 d) arranged at the ends of the clamping arms (202 a).

7. The blade extraction mechanism of claim 6, wherein: the clamping arm (202 a) comprises a key slot (202 a-1) arranged at the upper part of the clamping arm, and a clamping jaw (202 a-2) arranged at the lower part of the clamping arm (202 a).

8. The blade pulling mechanism of claim 6 or 7, wherein: the sliding block (202 b) comprises limit strips (202 b-1) symmetrically arranged on the side walls of the sliding block.

9. A fixing device, characterized in that: comprising a blade pulling mechanism according to any one of claims 1 to 8; and an adjusting unit (300) comprising a telescopic rod (301) arranged at the lower parts of the two ends of the cross beam (101), and a fixing ring (302) arranged at the lower part of the telescopic rod (301).

10. The fixture of claim 9, wherein: the telescopic rod (301) comprises a sleeve rod (301 a) arranged at the lower part of the cross beam (101), a sleeve (301 b) arranged at the lower part of the sleeve rod (301 a), and a spring bead (301 c) arranged on the side wall of the sleeve (301 b);

the fixing ring (302) comprises a first collar (302 a) arranged at the lower part of the sleeve (301 b), and a second collar (302 b) arranged below the first collar (302 a).