Lifting device for low pressure turbine rotor support cone wall

Abstract

The application discloses a lifting appliance for a low-pressure turbine rotor supporting conical wall. The lifting appliance for the low-pressure turbine rotor supporting conical wall comprises a lifting appliance body and at least two connecting bodies. The lifting appliance body is arranged on the inner side of the inner conical wall. The at least two connecting bodies are arranged on the lifting appliance body in a circumferential interval and are configured to be connected with the inner conical wall, and the connecting bodies comprise conical surfaces configured to be in contact with the inner conical wall. The lifting appliance of the application utilizes the inner cavity space of the inner conical wall, places the lifting appliance body on the inner side of the inner conical wall, and connects the conical surfaces of the at least two connecting bodies with the inner wall of the inner conical wall to realize the lifting of the supporting conical wall. The lifting appliance has a simple structure, is convenient and fast to install with the supporting conical wall during lifting, and thus improves the lifting efficiency.

Description

Technical Field

[0001] This invention relates to a lifting device for supporting the conical wall of a low-pressure turbine rotor. Background Technology

[0002] The support cone wall of the low-pressure turbine rotor is an important supporting structural component of the low-pressure turbine rotor, such as... Figure 1 As shown, the supporting conical wall 10 is a conical structure, including an outer conical wall 11 and a journal 12 disposed within the outer conical wall 11. The journal 12 includes an inner conical wall 121 located at the upper end, and a mounting edge 13 connects the large-diameter end of the inner conical wall 121 to the small-diameter end of the outer conical wall 11. That is, the journal 12 supporting the rear end is located in the conical cavity of the outer conical wall 11, the front end face of the mounting edge 13 is located in the open space, and the rear end face is located in the conical cavity of the outer conical wall 11. Before assembly or during fault detection and disassembly, it is necessary to measure the dimensions and runout of the low-pressure turbine rotor supporting conical wall. During the measurement process, the low-pressure turbine rotor supporting conical wall needs to be flipped. Since the weight of the conical wall is large, exceeding the safe operating weight range for manual flipping, front and rear lifting tools are required for flipping. According to the inventor's understanding of the relevant technology, when flipping the supporting conical wall, the rear lifting device needs to be connected to the thread on the journal 12, and the front lifting device is connected to the mounting edge 13 of the conical wall by bolts and nuts, thereby realizing the flipping operation of the conical wall. When the conical wall is flipped to the front-up position and placed on the measuring table, the connecting nut is not visible because the rear end face of the mounting edge is located in the conical cavity, and because the diameter of the conical wall is large, the disassembly and installation of the front lifting device is very inconvenient, resulting in low operation efficiency.

[0003] It should be noted that the statements in this background section only provide background information related to the present invention and do not necessarily constitute prior art. Summary of the Invention

[0004] This invention provides a lifting device for supporting the cone wall of a low-pressure turbine rotor to improve the lifting efficiency of the supporting cone wall.

[0005] This invention provides a lifting device for a low-pressure turbine rotor support cone wall. The low-pressure turbine rotor support cone wall includes an outer cone wall and a journal disposed within the outer cone wall. The journal includes an inner cone wall located at its upper end. A mounting edge connects the large-diameter end of the inner cone wall and the small-diameter end of the outer cone wall. The device includes:

[0006] The lifting device body is configured to be placed on the inner side of the inner conical wall; and

[0007] At least two connecting bodies are circumferentially spaced on the spreader body and configured to connect to the inner conical wall, and the connecting bodies include a conical surface that contacts and engages with the inner conical wall.

[0008] In some embodiments, the lifting tool body comprises a lifting plate and a lifting lug, the lifting plate comprises a lifting plate body and at least two protrusions extending radially outward from the lifting plate body, and the lifting lug is connected to the lifting plate body, and the at least two connecting bodies are correspondingly connected to the at least two protrusions.

[0009] In some embodiments, the lifting lug comprises a U-shaped arm and a stepped shaft arranged at the lower end of the U-shaped arm, the stepped shaft comprises a shaft body and a shaft shoulder, the shaft body passes through the through hole of the lifting plate body, and the shaft shoulder abuts against the lower end surface of the lifting plate body.

[0010] In some embodiments, an annular groove is arranged on the shaft body at the upper side of the lifting plate body, and the lifting tool comprises a ring arranged in the annular groove.

[0011] In some embodiments, the connecting body comprises a bent plate, the bent plate comprises a first plate and a second plate arranged obliquely relative to the first plate, the first plate is connected to the lifting tool body, the second plate is connected to the inner conical wall, and the outer surface of the second plate comprises a conical surface.

[0012] In some embodiments, the lifting tool further comprises a quick-release pin configured to connect the connecting body and the inner conical wall.

[0013] In some embodiments, a first through hole is arranged on the connecting body, the first through hole is configured to be coaxially arranged with a second through hole arranged on the inner conical wall, and the quick-release pin passes through the first through hole and the second through hole to connect the connecting body and the inner conical wall.

[0014] Based on the technical solutions provided by the present application, the lifting tool for supporting the conical wall of the low-pressure turbine rotor comprises a lifting tool body and at least two connecting bodies. The lifting tool body is configured to be placed on the inner side of the inner conical wall. The at least two connecting bodies are arranged on the lifting tool body in a circumferential direction and are configured to be connected to the inner conical wall, and the connecting body comprises a conical surface in contact with the inner conical wall. The lifting tool of the present application utilizes the inner cavity space of the inner conical wall, places the lifting tool body on the inner side of the inner conical wall, and connects the conical surface of the at least two connecting bodies to the inner wall of the inner conical wall to realize the lifting of the supporting conical wall. The lifting tool has a simple structure, is convenient and fast to install with the supporting conical wall during lifting, and thus improves the lifting efficiency.

[0015] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are intended to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their description serve to explain the present application. They are not intended to limit the present application unduly.

[0017] Figure 1 Structure diagram of the low-pressure turbine rotor supporting conical wall;

[0018] Figure 2 A schematic diagram showing the connection between the low-pressure turbine rotor support cone wall and the lifting device according to an embodiment of the present invention;

[0019] Figure 3 A schematic cross-sectional view of the connection between the low-pressure turbine rotor support cone wall and the lifting device according to an embodiment of the present invention;

[0020] Figure 4 This is a three-dimensional structural diagram of the lifting device according to an embodiment of the present invention;

[0021] Figure 5 for Figure 4 The diagram shows a cross-sectional view of the lifting device. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0024] For purposes of the description hereinafter, spatial relative terms, such as "on", "above", "at", "below", "upper", "lower", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device described herein is inverted from the orientation depicted in the figures, elements described as "above", "at", or "below" other elements or features would then be oriented "below", "at", or "above" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation that is above and below. The devices can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0025] Reference Figure 1 The low-pressure turbine rotor support cone wall 10 comprises an outer cone wall 11 and a shaft neck 12 arranged in the outer cone wall 11. The shaft neck 12 comprises an inner cone wall 121 at the upper end. The large-diameter end of the inner cone wall 121 is connected with the small-diameter end of the outer cone wall 11 through a mounting edge 13. The small-diameter end of the outer cone wall 11 is located at the upper side, and the large-diameter end is located at the lower side. The large-diameter end of the inner cone wall 121 is located at the upper side, and the small-diameter end is located at the lower side. The inner cavity of the inner cone wall 121 is hollow, and based on this, the present embodiment provides a lifting device 20 for the low-pressure turbine rotor support cone wall 10.

[0026] Reference Figures 2 to 5 The lifting device 20 for the low-pressure turbine rotor support cone wall provided by the present embodiment comprises a lifting device body and at least two connecting bodies. The lifting device body is configured to be placed on the inner side of the inner cone wall 121. The at least two connecting bodies are arranged on the lifting device body in a circumferential direction and are configured to be connected with the inner cone wall 121, and the connecting bodies comprise a conical surface in contact with the inner cone wall 121.

[0027] The lifting device 20 of the present embodiment utilizes the inner cavity space of the inner cone wall 121, places the lifting device body on the inner side of the inner cone wall 121, and connects the conical surface of the at least two connecting bodies with the inner wall of the inner cone wall to realize the lifting of the support cone wall 10. The lifting device 20 is simple in structure, and is convenient and fast to mount with the support cone wall 10 during lifting, thereby improving the lifting efficiency.

[0028] In some embodiments, referring to Figure 4 The lifting device body comprises a lifting plate 21 and a lifting lug 24. The lifting plate 21 comprises a lifting plate body and at least two protruding portions extending radially outward from the lifting plate body. The lifting lug 24 is connected to the lifting plate body. The at least two connecting bodies are correspondingly connected to the at least two protruding portions. Figure 4Exemplarily, the hanger plate body is circular, and the protruding part is a square protruding part extending radially outward from the hanger plate body. The hanger lug 24 is connected to the middle part of the hanger plate body.

[0029] Referring to Figure 5 , the hanger plate body includes a through hole in the middle part. The hanger lug 24 passes through the through hole and is connected to the hanger plate body.

[0030] In particular, referring to Figure 5 , in some embodiments, the hanger lug 24 includes a U-shaped arm and a stepped shaft arranged at the lower end of the U-shaped arm. The stepped shaft includes a shaft body and a shaft shoulder. The shaft body passes through the through hole of the hanger plate body, and the shaft shoulder abuts against the lower end surface of the hanger plate body.

[0031] In some embodiments, referring to Figure 5 , an annular groove 241 is arranged on the shaft body at the upper side of the hanger plate body, and the hanger lug 24 includes a ring 25 arranged in the annular groove 241. The cylindrical section between the annular groove and the shaft shoulder cooperates with the through hole in the middle part of the hanger plate body.

[0032] Referring to Figure 4 and Figure 5 , the two arms of the U-shaped arm are each provided with a through hole, and the hanger arm is installed on the U-shaped arm through the through holes on the two arms during hoisting.

[0033] In some embodiments, referring to Figure 4 and Figure 5 , the connecting body includes a bent plate 22. The bent plate 22 includes a first plate and a second plate arranged obliquely relative to the first plate. The first plate is connected to the hanger body, the second plate is connected to the inner conical wall 121, and the outer surface of the second plate includes a conical surface. In particular, as shown in Figure 4 , the first plate of the bent plate 22 is arranged horizontally and connected to the lower side of the hanger plate 21 by means of a bolt 26 and a nut 27, the second plate of the bent plate 22 is arranged obliquely outward relative to the first plate, that is, the second plate of the bent plate 22 is arranged obliquely outward relative to the first plate, and the outer surface of the second plate is a conical surface. As shown in Figure 3 , during installation of the hanger, the hanger body is first placed inside the inner conical wall 121, the outer surface of the second plate of each bent plate 22 is fitted to the inner surface of the inner conical wall 121, and the second plate of each bent plate 22 is connected to the inner conical wall 121.

[0034] In some embodiments, as shown in Figure 4 , the hanger further includes a quick-release pin 23 configured to connect the connecting body and the inner conical wall 121. In particular, the quick-release pin 23 is configured to connect the second plate of the bent plate 22 and the inner conical wall 121.

[0035] In some embodiments, as shown in Figure 5As shown, the connector is provided with a first through hole, which is coaxially arranged with a second through hole 122 provided on the inner tapered wall 121, and the quick release pin 3 passes through the first through hole and the second through hole 122 to connect the connector and the inner tapered wall 121.

[0036] The following is based on Figures 1 to 5 The structure of the lifting appliance 10 of the embodiment of the present application will be described in detail.

[0037] As Figure 4 and Figure 5 As shown, the lifting appliance 20 of the embodiment includes a lifting plate 21, a bent plate 22, a quick release pin 23, an ear 24, a collar 25, a bolt 26 and a nut 27.

[0038] The lifting plate 21 serves as the main body of the lifting appliance 20 and connects the bent plate 22 and the ear 24. The lifting plate 21 is a flat plate structure and is provided with a circular through hole in the middle for mounting the ear 24. The circumference of the lifting plate 21 is uniformly provided with four protruding parts, each of which is provided with four through holes, each of which is used to mount a bolt 6 to connect with the bent plate 22.

[0039] The bent plate 22 is used to connect with the inner tapered wall 121. The bent plate 22 includes a first plate arranged horizontally and a second plate arranged obliquely, and the fitting surface of the second plate with the inner tapered wall 121 is a tapered surface. The second plate is provided with a through hole in the middle for mounting the quick release pin 23 to connect the lifting appliance 20 and the inner tapered wall 121. The first plate is provided with four through holes for mounting bolts to connect with the lifting plate 21.

[0040] The ear 24 includes a U-shaped arm and a stepped shaft arranged at the lower end of the U-shaped arm. The lower end of the stepped shaft is provided with a shoulder, and the middle of the stepped shaft is provided with an annular groove for mounting the collar 15. The cylindrical section between the annular groove and the shoulder cooperates with the through hole provided in the middle of the lifting plate 21. The two arms of the U-shaped arm are provided with through holes for mounting the lifting arm.

[0041] The collar 25 is mounted in the annular groove of the ear 24 and serves as a limiting function.

[0042] As can be seen from the above, the lifting appliance of the embodiment includes four bent plates uniformly distributed in the circumferential direction, the outer side surface of the bent plate is a tapered surface, which cooperates with the inner surface of the inner tapered wall of the journal. The first through hole is provided on the bent plate, which is aligned with the second through hole of the inner tapered wall, and then the quick release pin is inserted into the aligned through hole, so as to connect the lifting appliance and the supporting tapered wall. When lifting, the inclined quick release pin will generate an upward supporting component on the tapered wall, and an upward lifting force is exerted on the tapered wall.

[0043] It should be pointed out finally that the above examples are only used to illustrate the technical solutions of the present application but not to limit it; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones without departing from the spirit of the technical solutions of the present application, and all of them should be covered in the technical solution range claimed by the present application.

Claims

1. A lifting device for a low-pressure turbine rotor support cone wall, the low-pressure turbine rotor support cone wall comprising an outer cone wall and a journal disposed within the outer cone wall, the journal comprising an inner cone wall at its upper end, and a mounting edge connecting the large-diameter end of the inner cone wall and the small-diameter end of the outer cone wall, characterized in that, include: The lifting device body is configured to be placed on the inner side of the inner conical wall; and At least two connecting bodies are circumferentially spaced on the lifting device body and configured to connect to the inner conical wall. Each connecting body includes a bent plate, which includes a first plate and a second plate inclined relative to the first plate. The first plate is connected to the lifting device body, and the second plate is connected to the inner conical wall. The outer surface of the second plate includes a conical surface that contacts and engages with the inner conical wall. The lifting device also includes a quick-release pin, which is configured to connect the connecting body and the inner conical wall. The connecting body is provided with a first through hole, which is configured to be coaxially arranged with a second through hole provided on the inner conical wall. The quick-release pin passes through the first through hole and the second through hole to connect the connecting body and the inner conical wall, so that when the quick-release pin is tilted during lifting, it will generate an upward supporting force on the conical wall.

2. The lifting device for supporting the conical wall of a low-pressure turbine rotor according to claim 1, characterized in that, The lifting device body includes a lifting plate and lifting lugs. The lifting plate includes a lifting plate body and at least two protrusions extending radially outward from the lifting plate body. The lifting lugs are connected to the lifting plate body, and the at least two connecting bodies are correspondingly connected to the at least two protrusions.

3. The lifting device for supporting the conical wall of a low-pressure turbine rotor according to claim 2, characterized in that, The lifting lug includes a U-shaped arm and a stepped shaft disposed at the lower end of the U-shaped arm. The stepped shaft includes a shaft body and a shaft shoulder. The shaft body passes through the through hole of the lifting plate body, and the shaft shoulder abuts against the lower end face of the lifting plate body.

4. The lifting device for supporting the conical wall of a low-pressure turbine rotor according to claim 3, characterized in that, The shaft body is provided with an annular groove located on the upper side of the lifting plate body, and the lifting device includes a retaining ring disposed in the annular groove.

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