CN215825223U - A back wheel separator for gas turbine overhauls - Google Patents

Abstract

The utility model discloses a back rest wheel separator for gas turbine maintenance, which comprises a first supporting platform arranged on a shaft neck of a gas turbine rotating shaft, a second supporting platform arranged on a shaft neck of a generator rotating shaft and a driving mechanism for driving and separating a back rest wheel, wherein the outer end surface of the first supporting platform is abutted against a shaft shoulder of the gas turbine rotating shaft, and the outer end surface of the second supporting platform is abutted against a shaft shoulder of the generator rotating shaft; the driving mechanism comprises a fixing portion and a movable portion capable of moving relative to the fixing portion, in the process of separating the backrest wheel, the end portion of the fixing portion abuts against the inner end face of the first supporting table, the movable portion penetrates through a bolt hole of the backrest wheel, and the end portion of the movable portion abuts against the inner end face of the second supporting table. The back wheel separator for the gas turbine maintenance can separate the back wheel quickly, conveniently and nondestructively.

Description

A back wheel separator for gas turbine overhauls

Technical Field

The utility model relates to a dismounting device, in particular to a back wheel separator for gas turbine maintenance.

Background

In a power plant, a gas turbine rotating shaft and a generator rotating shaft are connected by a back-rest wheel (the back-rest wheel is commonly called, and is called as a coupling and a flange in a professional name and is used for connecting mechanical equipment), and before a unit is overhauled, the back-rest wheel of the gas turbine needs to be separated from the back-rest wheel of the generator. The conventional separation method is as follows: the method comprises the following steps that three M16 jackscrew holes arranged along the radial direction are formed in a back wheel of the gas turbine and arranged at the connecting end of the back wheel in a broken edge mode, and when the back wheel of the gas turbine needs to be separated from the back wheel of a generator, bolts and nuts locked on the two back wheels are firstly disassembled; then, the jackscrew of M16 is locked into the jackscrew hole on the gas turbine back wheel, because the jackscrew hole sets up at the link and broken edge setting, therefore when the jackscrew got into, the jackscrew outwards extrudeed the back wheel of generator simultaneously to push away two back wheels and realize the separation. However, the above-described separation method of the back wheels has the following problems:

1. the backrest wheels are large in size and belong to large-sized parts, and when a top thread enters a top thread hole to squeeze two backrest wheels apart, a large acting force is needed, so that the top thread is easy to slip.

2. In the process of locking the three jackscrews, in order to extrude the backrest wheel by the three jackscrews at the same time, a first screw needs to be screwed into a small stroke, a second screw needs to be screwed into the same small stroke, a third screw needs to be screwed into the same small stroke, and the rest can be done in the same way until the backrest wheel is separated by extrusion.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a back-wheel separator for gas turbine maintenance, which can separate a back-wheel quickly, conveniently and nondestructively.

The technical scheme for solving the technical problems is as follows:

a back wheel separator for gas turbine maintenance comprises a first supporting table arranged on a shaft neck of a rotating shaft of a gas turbine, a second supporting table arranged on a shaft neck of a rotating shaft of a generator and a driving mechanism for driving and separating a back wheel, wherein the outer end face of the first supporting table abuts against a shaft shoulder of the rotating shaft of the gas turbine, and the outer end face of the second supporting table abuts against a shaft shoulder of the rotating shaft of the generator; the driving mechanism comprises a fixing portion and a movable portion which can stretch relative to the fixing portion, in the process of separating the backrest wheel, the end portion of the fixing portion abuts against the inner end face of the first supporting table or the second supporting table, the movable portion penetrates through the bolt hole of the backrest wheel, and the end portion of the movable portion and the fixing portion abut against the inner end face of the second supporting table or the first supporting table relatively.

The working principle of the backrest wheel is as follows:

before the unit is overhauled, the back wheel of the gas turbine needs to be separated from the back wheel of the generator, and the working process is as follows: firstly, disassembling a bolt on a back wheel; next, mounting the first support platform on a shaft neck of a rotating shaft of the gas turbine, and enabling the outer end face of the first support platform to be abutted against a shaft shoulder; mounting the second support platform on a shaft neck of a rotating shaft of the generator, and enabling the outer end face of the second support platform to be tightly abutted against a shaft shoulder; then, the end face of the fixing part of the driving mechanism is tightly attached to the inner end face of the first support table, the driving mechanism is operated to drive the movable part to move towards the direction of the generator and penetrate through the bolt hole in the backrest wheel, and the end face of the movable part is tightly attached to the inner end face of the second support table; and finally, continuously operating the driving mechanism to enable the movable part to continuously move towards the direction of the engine, wherein the fixed part of the driving mechanism is abutted against the first supporting table, and the movable part is abutted against the second supporting table, so that the acting force generated by the driving mechanism generates an outward acting force on a rotating shaft of the gas turbine through the first supporting table, and generates an outward acting force on a rotating shaft of the generator through the second supporting table, and therefore, the two back wheels can be conveniently and quickly separated, and the back wheels cannot be damaged in the separation process.

In a preferred embodiment of the present invention, the first supporting table includes two first half supporting tables, the two first half supporting tables form a snap ring structure through the first connecting structure, and an inner diameter of the snap ring structure is matched with a journal of a gas turbine rotating shaft.

Preferably, the first connecting structure comprises a first connecting bar arranged at two ends of the first half supporting platform, a bolt and a nut matched with the bolt; the inner end face of the first connecting strip is overlapped with the diameter of the first half supporting platform, and two bolt holes are formed in the first connecting strip.

Preferably, the first connecting structure further comprises a reinforcing plate locked at the side surfaces of the two first connecting bars by bolts.

Preferably, the first half supporting platform is provided with a supporting part used for contacting with the fixing part, the outer end face of the supporting part is flush with the outer end face of the first half supporting platform, and the inner end face of the supporting part protrudes inwards for a certain distance; the size of the supporting part is matched with that of the end face of the fixing part.

In a preferred embodiment of the present invention, the second supporting platform includes two second half supporting platforms, the two second half supporting platforms form a snap ring structure through the second connecting structure, and an inner diameter of the snap ring structure is matched with a journal of the generator rotating shaft.

Preferably, the second connecting structure comprises a second connecting strip arranged at two ends of the second half supporting platform, a bolt and a nut matched with the bolt; the inner end face of the second connecting strip is overlapped with the diameter of the second half supporting table, and two bolt holes are formed in the second connecting strip.

Preferably, a supporting structure for contacting with the movable part is arranged on the second half supporting platform, and the supporting structure comprises a supporting seat and a supporting piece arranged on the supporting seat; the outer end face of the supporting seat is flush with the outer end face of the second half supporting table, and the inner end face of the supporting seat protrudes inwards for a certain distance; one end of the supporting piece is connected to the inner end face of the supporting seat, and the other end of the supporting piece extends inwards in the axial direction.

In a preferred embodiment of the present invention, there are two driving mechanisms, and the two driving mechanisms are symmetrically arranged.

In a preferred embodiment of the present invention, the driving mechanism is a jack, wherein a base of the jack constitutes the fixed portion, and a top rod of the jack constitutes the movable portion.

Compared with the prior art, the utility model has the following beneficial effects:

1. the back-rest wheel separator of the utility model separates two back-rest wheels outwards by utilizing the driving action of the driving mechanism and through the first supporting platform arranged on the rotating shaft of the gas turbine and the second supporting platform arranged on the rotating shaft of the generator, compared with the traditional mode that broken edge jackscrew holes are required to be arranged on the end surfaces of the back-rest wheels, the back-rest wheels are not damaged, meanwhile, the technology for processing the jackscrew holes is saved, the production cost is saved, and the situation that jackscrews need to be repeatedly replaced due to the fact that the jackscrews are slippery is avoided.

2. According to the back-wheel separator, in the process of separating the back-wheels, the driving mechanism is continuously operated in one direction, so that the function of separating the two back-wheels can be realized, and compared with the traditional mode that the back-wheels need to be continuously rotated so as to sequentially lock the top threads into the top thread holes, the back-wheel separator is more convenient in operation mode and higher in efficiency.

Drawings

Fig. 1 to 2 are schematic views of a back-wheel separator for gas turbine maintenance according to the present invention in an operating state, in which fig. 1 is a front sectional view and fig. 2 is a perspective view.

Fig. 3 is a perspective view of the first support table.

Fig. 4 is a perspective view of the second support base.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.

Referring to fig. 1-4, the back-rest wheel separator for gas turbine maintenance of the present invention includes a first supporting platform 1 disposed on a journal of a gas turbine rotating shaft, a second supporting platform 2 disposed on a journal of a generator rotating shaft, and a driving mechanism 8 for driving and separating the back-rest wheel, wherein an outer end surface of the first supporting platform 1 abuts against a shaft shoulder of the gas turbine rotating shaft, and an outer end surface of the second supporting platform 2 abuts against a shaft shoulder of the generator rotating shaft; the driving mechanism 8 comprises a fixing portion 3 and a movable portion 4 which can stretch relative to the fixing portion 3, in the process of separating the backrest wheel, the end portion of the fixing portion 3 abuts against the inner end face of the first supporting table 1 or the inner end face of the second supporting table 2, the movable portion 4 penetrates through a bolt hole of the backrest wheel, and the end portion of the movable portion 4 and the fixing portion 3 abut against the inner end face of the second supporting table 2 or the inner end face of the first supporting table 1 relatively.

Referring to fig. 1 to 4, the first supporting platform 1 includes two first half supporting platforms 5, and the two first half supporting platforms 5 form a snap ring structure through a first connecting structure, and the inner diameter of the snap ring structure is matched with the shaft neck of the gas turbine rotating shaft. When the back wheel needs to be separated, the first supporting table 1 with the structure is arranged on a shaft neck of a rotating shaft of the gas turbine, and the mounting method comprises the following steps: firstly, clamping one first half support platform 5 on a shaft neck of a gas turbine rotating shaft, and then clamping the other first half support platform 5 on the shaft neck of the gas turbine rotating shaft from the opposite direction; and finally, locking the two first half supporting tables 5 through a first connecting structure to form the first supporting table 1 with an annular structure, so that the first supporting table 1 is installed on the rotating shaft of the gas turbine.

Referring to fig. 1 to 4, the first connecting structure includes first connecting bars 5-1 disposed at both ends of a first half supporting stage 5, a bolt, and a nut matched with the bolt; the inner end face of the first connecting strip 5-1 is overlapped with the diameter of the first half supporting platform 5, and two bolt holes are formed in the first connecting strip 5-1. The first connecting structure is arranged, when the first half supporting tables 5 are connected, the inner end faces of the first connecting strips 5-1 on the two first half supporting tables 5 are mutually attached, because the inner end faces of the first connecting strips 5-1 are superposed with the diameters of the first half supporting tables 5, the two first half supporting tables 5 form a complete annular structure when the inner end faces of the first connecting strips 5-1 are mutually attached, at the moment, bolts penetrate through bolt holes, and the two first half supporting tables 5 can be connected into the integral first supporting table 1 by locking nuts.

Referring to fig. 1 to 4, the first connecting structure further includes a reinforcing plate 6, and the reinforcing plate 6 is fastened to the sides of the two first connecting bars 5-1 by bolts. By the aid of the reinforcing plate 6, when the two first half supporting platforms 5 are connected, the reinforcing plate 6 is locked on the side faces of the two first connecting strips 5-1, connection strength between the first connecting strips 5-1 is further enhanced, and the first half supporting platforms 5 are connected more firmly and reliably.

Referring to fig. 1-4, a support portion 5-2 for contacting the fixing portion 3 is disposed on the first half supporting platform 5, an outer end surface of the support portion 5-2 is flush with an outer end surface of the first half supporting platform 5, and an inner end surface of the support portion 5-2 protrudes inward by a certain distance; the size of the supporting part 5-2 is matched with that of the end face of the fixing part 3. The supporting part 5-2 is arranged, the inner end face of the supporting part 5-2 protrudes inwards for a certain distance, and the thickness of the supporting part 5-2 is larger than that of other parts on the first half supporting platform 5, so that the supporting part 5-2 has better structural strength, and when the fixing part 3 is tightly abutted on the supporting part 5-2, the load born by the supporting part 5-2 is larger.

Referring to fig. 1 to 4, the second support platform 2 includes two second half support platforms 7, and the two second half support platforms 7 form a snap ring structure through a second connecting structure, and the inner diameter of the snap ring structure is matched with the shaft neck of the rotating shaft of the generator. When the back wheel needs to be separated, the second support platform 2 with the structure is arranged on the shaft neck of the rotating shaft of the generator, and the mounting method comprises the following steps: firstly, one second half supporting platform 7 is clamped on a shaft neck of a rotating shaft of the generator, and then the other second half supporting platform 7 is clamped on the shaft neck of the rotating shaft of the generator from the opposite direction; and finally, the two second half supporting platforms 7 are locked through a second connecting structure to form a second supporting platform 2 with an annular structure, so that the second supporting platform 2 is installed on the rotating shaft of the generator.

Referring to fig. 1-4, the second connecting structure includes a second connecting bar 7-1 disposed at two ends of the second half supporting platform 7, a bolt, and a nut matched with the bolt; the inner end face of the second connecting strip 7-1 is overlapped with the diameter of the second half supporting platform 7, and two bolt holes are formed in the second connecting strip 7-1. The second connecting structure is arranged, when the second connecting structure is connected, the inner end faces of the second connecting strips 7-1 on the two second half supporting platforms 7 are mutually attached, because the inner end faces of the second connecting strips 7-1 are superposed with the diameters of the second half supporting platforms 7, the two second half supporting platforms 7 form a finished annular structure when the inner end faces of the second connecting strips 7-1 are mutually attached, at the moment, bolts penetrate through bolt holes, and the two second half supporting platforms 7 can be connected into the integral second supporting platform 2 by locking nuts.

With reference to fig. 1-4, a support structure for contacting the movable portion 4 is provided on the second half supporting platform 7, and the support structure includes a supporting seat 7-2 and a supporting member 7-3 provided on the supporting seat 7-2; the outer end face of the supporting seat 7-2 is flush with the outer end face of the second half supporting seat 7, and the inner end face of the supporting seat 7-2 protrudes inwards for a certain distance; one end of the supporting piece 7-3 is connected to the inner end face of the supporting seat 7-2, and the other end of the supporting piece extends inwards in the axial direction. The supporting structure is arranged, the inner end face of the supporting seat 7-2 protrudes inwards for a certain distance, and the thickness of the supporting seat 7-2 is larger than that of other parts on the second half supporting seat 7, so that the supporting part 5-2 has better structural strength; the supporting piece 7-3 is arranged on the supporting seat 7-2, and the supporting piece 7-3 extends inwards along the axial direction, so that the movable part 4 can be contacted with the supporting piece 7-3 more quickly when being extended, thereby reducing the moving stroke of the movable part 4 and improving the working efficiency.

Referring to fig. 1 to 4, there are two driving mechanisms 8, and the two driving mechanisms 8 are symmetrically arranged. Two driving mechanisms 8 are arranged, so that acting forces acting on the rotating shaft of the gas turbine and the rotating shaft of the engine are more balanced, and the backrest wheels are stably separated along the axial direction of the rotating shaft more smoothly.

Referring to fig. 1-4, the driving mechanism 8 is a jack, wherein the base of the jack constitutes the fixed part 3 and the top rod of the jack constitutes the movable part 4. The driving mechanism 8 is arranged to tightly support the end face of the jack base on the inner end face of the first supporting table 1, tightly support the ejector rod of the jack on the inner end face of the second supporting table 2, and enable the ejector rod to move outwards by operating the driving handle of the jack, so that the two back wheels are separated.

Referring to fig. 1-4, the working principle of the back wheel is as follows:

before the unit is overhauled, the back wheel of the gas turbine needs to be separated from the back wheel of the generator, and the working process is as follows: firstly, disassembling a bolt on a back wheel; next, mounting the first support table 1 on a shaft neck of a gas turbine rotating shaft, and enabling the outer end face of the first support table 1 to abut against a shaft shoulder; mounting the second support platform 2 on a shaft neck of a generator rotating shaft, and enabling the outer end face of the second support platform 2 to be tightly abutted against a shaft shoulder; then, the end surface of the fixing part 3 of the driving mechanism 8 is attached to the inner end surface of the first support table 1, the driving mechanism 8 is operated to drive the movable part 4 to move towards the direction of the generator and penetrate through the bolt hole on the backrest wheel, so that the end surface of the movable part 4 is abutted to the inner end surface of the second support table 2; finally, the driving mechanism 8 is continuously operated, so that the movable part 4 continuously moves towards the direction of the engine, as the fixed part 3 of the driving mechanism 8 is tightly propped against the first supporting platform 1, and the movable part 4 is tightly propped against the second supporting platform 2, the acting force generated by the driving mechanism 8 generates an outward acting force on the rotating shaft of the gas turbine through the first supporting platform 1, and generates an outward acting force on the rotating shaft of the generator through the second supporting platform 2, therefore, the two back wheels can be conveniently and quickly separated, and the back wheels cannot be damaged in the separation process.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.

Claims (10)

1. A back-rest wheel separator for gas turbine maintenance is characterized by comprising a first supporting platform arranged on a shaft neck of a gas turbine rotating shaft, a second supporting platform arranged on a shaft neck of a generator rotating shaft and a driving mechanism for driving and separating a back-rest wheel, wherein the outer end surface of the first supporting platform is abutted against a shaft shoulder of the gas turbine rotating shaft, and the outer end surface of the second supporting platform is abutted against a shaft shoulder of the generator rotating shaft; the driving mechanism comprises a fixing portion and a movable portion which can stretch relative to the fixing portion, in the process of separating the backrest wheel, the end portion of the fixing portion abuts against the inner end face of the first supporting table or the second supporting table, the movable portion penetrates through the bolt hole of the backrest wheel, and the end portion of the movable portion and the fixing portion abut against the inner end face of the second supporting table or the first supporting table relatively.

2. The back-wheel separator for gas turbine maintenance of claim 1, wherein the first support table comprises two first half support tables, the two first half support tables forming a snap ring structure through the first connecting structure, the snap ring structure having an inner diameter matching a journal of a gas turbine rotating shaft.

3. The back-wheel separator for gas turbine service of claim 2, wherein the first connecting structure comprises a first connecting bar disposed at both ends of the first half supporting platform, a bolt, and a nut matched with the bolt; the inner end face of the first connecting strip is overlapped with the diameter of the first half supporting platform, and two bolt holes are formed in the first connecting strip.

4. A back-wheel separator for gas turbine service according to claim 3, wherein the first connecting structure further comprises a reinforcing plate bolted to the sides of the two first connecting bars.

5. The back rest wheel separator for gas turbine maintenance of claim 2, wherein the first half support table is provided with a support portion for contacting the fixing portion, an outer end surface of the support portion is flush with an outer end surface of the first half support table, and an inner end surface of the support portion protrudes inward by a certain distance; the size of the supporting part is matched with that of the end face of the fixing part.

6. The back-wheel separator for gas turbine maintenance of claim 1, wherein the second support table comprises two second half support tables, the two second half support tables forming a snap ring structure through the second connecting structure, the snap ring structure having an inner diameter matching with a journal of the generator shaft.

7. The back-wheel separator for gas turbine maintenance of claim 6, wherein the second connecting structure comprises a second connecting bar disposed at both ends of the second half supporting platform, a bolt, and a nut matched with the bolt; the inner end face of the second connecting strip is overlapped with the diameter of the second half supporting table, and two bolt holes are formed in the second connecting strip.

8. The back-rest wheel separator for gas turbine maintenance of claim 6, wherein a support structure for contacting the movable portion is provided on the second half support table, the support structure including a support base and a support member provided on the support base; the outer end face of the supporting seat is flush with the outer end face of the second half supporting table, and the inner end face of the supporting seat protrudes inwards for a certain distance; one end of the supporting piece is connected to the inner end face of the supporting seat, and the other end of the supporting piece extends inwards in the axial direction.

9. The back-wheel separator for gas turbine maintenance of any one of claims 1-8, wherein there are two of said drive mechanisms, and said two drive mechanisms are symmetrically disposed.

10. The back-wheel separator for gas turbine maintenance as claimed in any one of claims 1 to 8, wherein the driving mechanism is a jack, wherein a base of the jack constitutes the fixed portion and a ram of the jack constitutes the movable portion.

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