Disassembling and assembling tool for low-pressure turbine

Abstract

The invention provides a low-pressure turbine disassembling and assembling tool, and relates to the technical field of aero-engine tools. The low-pressure turbine disassembling and assembling tool comprises a low-pressure rotor and stator disassembling and assembling device and a low-pressure turbine shaft disassembling and assembling device which are detachably connected, when the low-pressure rotor and stator disassembling and assembling device and the low-pressure turbine shaft disassembling and assembling device are assembled, the horizontal disassembling and assembling requirement of a low-pressure turbine can be met, and after the low-pressure rotor and stator disassembling and assembling device and the low-pressure turbine shaft disassembling and assembling device are disassembled, the horizontal disassembling and assembling requirement of the low-pressure turbine can be met. And the requirement for independent placement of the rotor and stator unit bodies and the low-pressure turbine shaft can be met. The low-pressure rotor and stator disassembling and assembling device can enable the rotor and stator unit bodies to be adjusted between the horizontal state and the vertical state. When the rotor and stator unit bodies are in the horizontal state, the low-pressure turbine can be horizontally disassembled and assembled, and when the rotor and stator unit bodies are in the vertical state, the low-pressure turbine can be vertically disassembled and assembled. Therefore, the low-pressure turbine disassembling and assembling tool can meet various requirements in the low-pressure turbine disassembling and assembling process, the types of special tools are reduced, and the process cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of aviation engine tools, and in particular to a low-pressure turbine disassembly and assembly tool. Background Art

[0002] The low-pressure turbine of an aircraft engine is an important component of the aircraft engine. It consists of a rotor-stator unit and a low-pressure turbine shaft. The connection between the low-pressure turbine shaft and the rotor-stator unit is located inside the rotor-stator disc cavity of the low-pressure turbine. The rotor-stator unit consists of a multi-stage rotor, a multi-stage stator and a casing. The rotors are connected by bolts, and the stator is clamped on the casing by a slot. The rotor and stator are relatively independent. After the low-pressure turbine is installed on the aircraft engine, the rotor and stator can be positioned.

[0003] At present, the disassembly and assembly of low-pressure turbines mostly adopts the method of assembly. For example, the invention patent with application number CN201910613809.4 and name "Vertical low-pressure turbine unit assembly device and assembly method" proposes a vertical assembly device and method to realize the vertical assembly of each unit of the low-pressure turbine. Since the low-pressure turbine shaft is as long as 2000mm, the vertical assembly has high requirements on the height of the factory building and requires a special ladder. There are many safety hazards in the high-altitude operation. In addition, the vertical assembly is adopted, and the low-pressure turbine is located inside the vertical assembly frame. In addition, the connection position between the low-pressure turbine shaft and the rotor-stator is inside the rotor-stator disc cavity. The installation of the low-pressure turbine shaft and the rotor-stator bolts and nuts will be inconvenient to operate due to the small space, and the efficiency is low.

[0004] In order to improve the above problems, some horizontal assembly devices for assembling low-pressure turbines by horizontal assembly have appeared, for example, the patent application with application number CN201510612569.8 and titled "Docking Installation Device". However, the current low-pressure turbine assembly device has a relatively single function when assembling the low-pressure turbine, and it is difficult to meet the various requirements in the low-pressure turbine assembly process. Summary of the invention

[0005] The object of the present invention is to provide a low-pressure turbine disassembly and assembly tool, which can meet various usage requirements during the low-pressure turbine assembly process.

[0006] The embodiments of the present invention can be implemented in the following ways:

[0007] A low-pressure turbine disassembly and assembly tool, comprising a low-pressure rotor-stator disassembly and assembly device, the low-pressure rotor-stator disassembly and assembly device comprising a low-pressure rotor-stator support frame and a low-pressure rotor-stator fixing fixture, the low-pressure rotor-stator fixing fixture comprising two rotating support members arranged opposite to each other, the two rotating support members are used to be installed on the radial sides of a rotor-stator unit body, the rotating support members are used to rotatably cooperate with the low-pressure rotor-stator support frame to rotatably support the rotor-stator unit body on the low-pressure rotor-stator support frame, so that the rotor-stator unit body can be adjusted between a horizontal state and a vertical state; and

[0008] A low-pressure turbine shaft disassembly and assembly device is used to horizontally support the low-pressure turbine shaft; the low-pressure turbine shaft disassembly and assembly device is detachably connected to the low-pressure rotor and stator disassembly and assembly device.

[0009] Optionally, the rotating support member includes a mounting seat, a first supporting shaft and a second supporting shaft, the first supporting shaft and the second supporting shaft are mounted side by side on the mounting seat, and the first supporting shaft and the second supporting shaft are both used to rotate with the low-pressure rotor stator support frame, so that the low-pressure rotor stator fixing fixture can rotate relative to the low-pressure rotor stator support frame around the axis of the first supporting shaft or the axis of the second supporting shaft;

[0010] Among them, when the first support shaft and the second support shaft are both supported on the low-pressure rotor-stator support frame, the rotor-stator unit is in a horizontal state; when the first support shaft is supported on the low-pressure rotor-stator support frame and the second support shaft is located on the upper side of the first support shaft, the rotor-stator unit is in a first vertical state; when the second support shaft is supported on the low-pressure rotor-stator support frame and the first support shaft is located on the upper side of the second support shaft, the rotor-stator unit is in a second vertical state.

[0011] Optionally, a first positioning hole and a second positioning hole are provided on the first support shaft, and a third positioning hole is provided on the low-pressure rotor stator support frame; the low-pressure rotor stator fixing fixture further comprises a positioning pin, and the first positioning hole and the second positioning hole are respectively used to cooperate with the third positioning hole through the positioning pin to limit the relative position of the first support shaft and the low-pressure rotor stator support frame;

[0012] Among them, when the positioning pin is inserted into the first positioning hole and the third positioning hole, the low-pressure rotor-stator fixing clamp supports the rotor-stator unit body in the horizontal state; when the positioning pin is inserted into the second positioning hole and the third positioning hole, the low-pressure rotor-stator fixing clamp supports the rotor-stator unit body in the first vertical state.

[0013] Optionally, a fourth positioning hole and a fifth positioning hole are provided on the second support shaft, and a sixth positioning hole is provided on the low-pressure rotor stator support frame; the low-pressure rotor stator fixing fixture further comprises a positioning pin, and the fourth positioning hole and the fifth positioning hole are respectively used to cooperate with the sixth positioning hole through the positioning pin to limit the relative position of the second support shaft and the low-pressure rotor stator support frame;

[0014] Among them, when the positioning pin is inserted into the fourth positioning hole and the sixth positioning hole, the low-pressure rotor-stator fixing clamp supports the rotor-stator unit body in the horizontal state; when the positioning pin is inserted into the fifth positioning hole and the sixth positioning hole, the low-pressure rotor-stator fixing clamp supports the rotor-stator unit body in the second vertical state.

[0015] Optionally, the low-pressure rotor-stator fixing fixture also includes a fixing disk and a rotor fixing assembly, the fixing disk is annular and is used to be fixedly connected to the rear mounting edge of the rotor-stator unit body; the rotor fixing assembly is fixedly connected to the inner edge of the fixing disk, and the rotor fixing assembly is used to be fixedly connected to the rotor of the rotor-stator unit body; the two rotating supports are both fixedly connected to the fixing disk and are relatively arranged on both radial sides of the fixing disk.

[0016] Optionally, the rotor fixing assembly includes a support ring and a plurality of hook blocks; the support ring includes a ring tube portion, a first connecting ring portion and a second connecting ring portion, the first connecting ring portion and the second connecting ring portion are respectively arranged on both axial sides of the ring tube portion, and the first connecting ring portion extends radially outward along the ring tube portion, and the first connecting ring portion is fixedly connected to the inner edge of the fixed disk; the second connecting ring portion extends radially inward along the ring tube portion; the plurality of hook blocks are arranged on the second connecting ring portion along the circumferential rotation of the support ring, and the plurality of hook blocks are respectively used to be clamped and fixed with the center of the last stage turbine disk of the rotor and stator unit.

[0017] Optionally, the rotor fixing assembly also includes an adjusting bolt and a locking bolt, wherein the locking bolt passes through the first connecting ring portion and is threadedly connected to the fixing disk to lock the support ring on the fixing disk; the adjusting bolt is threadedly connected to the first connecting ring portion and is used to abut against the axial end face of the fixing disk to adjust the axial position of the support ring relative to the fixing disk.

[0018] Optionally, the low-pressure turbine shaft disassembly and assembly device includes a frame, a horizontal sliding assembly and a posture adjustment assembly. The frame is detachably connected to the low-pressure rotor-stator disassembly and assembly device, and the posture adjustment assembly is installed on the frame through the horizontal sliding assembly. The posture adjustment assembly is used to horizontally support the low-pressure turbine shaft and adjust the posture of the low-pressure turbine shaft so that the low-pressure turbine shaft is aligned with the supporting cone wall of the rotor-stator unit body; the horizontal sliding assembly is used to drive the posture adjustment assembly to slide relative to the frame so that the low-pressure turbine shaft is close to or away from the rotor-stator unit body to meet the disassembly and assembly requirements.

[0019] Optionally, the horizontal sliding assembly includes a base and an axial slide, the base is fixedly mounted on the frame and is provided with a groove; the posture adjustment assembly is mounted on the axial slide, and a boss is provided below the axial slide, and the boss is slidably engaged with the groove.

[0020] Optionally, an axial long groove is further provided on the base, and a plurality of limit pins are protruding from the side of the boss, and the limit pins are slidably matched with the axial long groove to limit the boss in the groove.

[0021] Optionally, the posture adjustment component includes a height adjustment structure, and the height adjustment structure is used to adjust the height posture of the low-pressure turbine shaft.

[0022] Optionally, the height adjustment structure includes a support seat and a wedge-shaped slider, the support seat is provided with a first abutting inclined surface and a second abutting inclined surface, the wedge-shaped slider is installed on the horizontal sliding assembly and has a third abutting inclined surface abutting and cooperating with the first abutting inclined surface, the horizontal sliding assembly is provided with a fourth abutting inclined surface abutting and cooperating with the second abutting inclined surface, and the wedge-shaped slider is used to approach or move away from the fourth abutting inclined surface to drive the support seat to move up and down to adjust the height position of the low-pressure turbine shaft.

[0023] Optionally, the posture adjustment assembly further includes a screw rod, which is threadedly connected to the wedge-shaped slider and is used to drive the wedge-shaped slider to move relatively closer to or away from the fourth abutting inclined surface through rotation of the screw rod.

[0024] The posture adjustment assembly also includes a retaining ring, which is rotatably disposed on the screw rod and fixedly connected to the support seat to limit the movement of the screw rod relative to the support seat along the axial direction of the screw rod.

[0025] Optionally, the posture adjustment assembly further includes an angle adjustment structure, which is used to rotatably support the low-pressure turbine shaft so as to adjust the angular posture by rotating the low-pressure turbine shaft along the axial direction of the low-pressure turbine shaft.

[0026] Optionally, the angle adjustment structure has two support assemblies, the two support assemblies are arranged at intervals on the height adjustment structure, and are used to support both ends of the low-pressure turbine shaft;

[0027] The support assembly comprises a top support wheel and two bottom support wheels, wherein the top support wheel and the two bottom support wheels clamp the low-pressure turbine shaft in a three-point manner.

[0028] Optionally, the support assembly further comprises a pressing frame, the top support wheel is rotatably mounted on the pressing frame, and the pressing frame is detachably connected to the height adjustment structure via bolts.

[0029] Optionally, the low-pressure turbine disassembly and assembly tool further includes a connecting beam, and two ends of the connecting beam are detachably connected to the low-pressure turbine shaft disassembly and assembly device and the low-pressure rotor and stator disassembly and assembly device respectively.

[0030] The beneficial effects of the low-pressure turbine disassembly and assembly tool provided by the embodiment of the present invention include:

[0031] An embodiment of the present invention provides a low-pressure turbine disassembly and assembly tool, which includes a low-pressure rotor-stator disassembly and assembly device and a low-pressure turbine shaft disassembly and assembly device, and the low-pressure turbine shaft disassembly and assembly device is used to horizontally support the low-pressure turbine shaft. The low-pressure rotor-stator disassembly and assembly device and the low-pressure turbine shaft disassembly and assembly device are detachably connected. When the low-pressure rotor-stator disassembly and assembly device and the low-pressure turbine shaft disassembly and assembly device are assembled, the horizontal assembly requirements of the low-pressure turbine can be met. After the low-pressure rotor-stator disassembly and assembly device and the low-pressure turbine shaft disassembly and assembly device are disassembled, the rotor-stator unit body and the low-pressure turbine shaft can be placed separately. The low-pressure rotor-stator disassembly and assembly device includes a low-pressure rotor-stator support frame and a low-pressure rotor-stator fixing fixture. The low-pressure rotor-stator fixing fixture includes two rotating support members arranged oppositely, and the two rotating support members are used to be installed on the radial sides of the rotor-stator unit body. The rotating support member is used to rotate with the low-pressure rotor-stator support frame, so as to rotationally support the rotor-stator unit body on the low-pressure rotor-stator support frame, so that the rotor-stator unit body can be adjusted between a horizontal state and a vertical state. On the one hand, when the rotor-stator unit is in a horizontal state, the low-pressure turbine can be assembled horizontally, and when the rotor-stator unit is in a vertical state, the low-pressure turbine can be assembled vertically. On the other hand, when the low-pressure rotor-stator disassembly and assembly device is used alone and the rotor-stator unit is in a vertical state, the rotor-stator unit can be measured and inspected. In this way, the low-pressure turbine disassembly and assembly tool can meet various needs during the low-pressure turbine disassembly and assembly process, reduce the types of special tools, and help reduce process costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0033] Figure 1 A schematic structural diagram of a low-pressure turbine provided according to one aspect of the present invention is shown;

[0034] Figure 2 A schematic structural diagram of a low-pressure turbine disassembly and assembly tool provided according to one aspect of the present invention when horizontally assembling a low-pressure turbine is shown;

[0035] Figure 3 A schematic cross-sectional structure diagram of a low-pressure turbine disassembly and assembly tool provided according to one aspect of the present invention when horizontally assembling a low-pressure turbine is shown;

[0036] Figure 4 It shows a schematic structural diagram of the low-pressure rotor-stator disassembly and assembly device provided according to one aspect of the present invention when the rotor-stator unit body is supported in a horizontal state;

[0037] Figure 5 It shows a structural diagram of the low-pressure rotor-stator disassembly and assembly device provided according to one aspect of the present invention when the rotor-stator unit body is supported in a first vertical state;

[0038] Figure 6 It shows a structural diagram of the low-pressure rotor-stator disassembly and assembly device provided according to one aspect of the present invention when the rotor-stator unit body is supported in a second vertical state;

[0039] Figure 7 A schematic structural diagram of a low-pressure rotor and stator fixing fixture in a low-pressure turbine disassembly and assembly tool provided according to one aspect of the present invention is shown;

[0040] Figure 8 A schematic cross-sectional view of a local structure of a low-pressure rotor-stator fixing fixture clamping a rotor-stator unit body according to one aspect of the present invention is shown;

[0041] Fig. 9 A schematic diagram of the explosion structure of a low-pressure turbine shaft disassembly and assembly device provided according to one aspect of the present invention is shown;

[0042] Fig.10 A schematic cross-sectional structure diagram of a low-pressure turbine shaft disassembly and assembly device provided according to one aspect of the present invention is shown.

[0043] Reference numerals:

[0044] 10-low-pressure turbine disassembly and assembly tool; 100-low-pressure rotor-stator disassembly and assembly device; 110-low-pressure rotor-stator support frame; 120-low-pressure rotor-stator fixing fixture; 121-fixing plate; 1211-installation part; 122-support ring; 1221-first connecting ring part; 1222-ring tube part; 1223-second connecting ring part; 123-hook block; 124-adjusting bolt; 125-locking bolt; 126-rotation support member; 127-first support shaft; 128-second support shaft; 129-first positioning hole; 131-second positioning hole; 132-fourth positioning hole; 133-fifth positioning hole; 134-positioning plate; 135-mounting seat; 20 0-low-pressure turbine shaft disassembly and assembly device; 210-frame; 211-moving wheel; 220-horizontal sliding assembly; 221-base; 222-groove; 223-axial long groove; 224-axial sliding seat; 225-boss; 226-limiting pin; 227-fourth top-receiving inclined surface; 228-baffle portion; 230-position adjustment assembly; 231-support seat; 232-first top-receiving inclined surface; 233-second top-receiving inclined surface; 234-wedge-shaped slider; 235-third top-receiving inclined surface; 236-screw; 237-retaining ring; 238-support assembly; 239-top support wheel; 241-bottom support wheel; 242-pressing frame; 300-connecting beam;

[0045] 20-low-pressure turbine; 21-rotor-stator unit; 22-casing; 23-front mounting edge; 24-rear mounting edge; 25-rotor; 26-stator; 27-support cone wall; 28-low-pressure turbine shaft. DETAILED DESCRIPTION

[0046] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0047] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Figure 1 This is a schematic diagram of the structure of the low-pressure turbine 20 provided in this embodiment. Figure 1 The low-pressure turbine 20 includes a rotor-stator unit body 21 and a low-pressure turbine shaft 28. The low-pressure turbine shaft 28 is a long rod-shaped shaft structure, one end of which is fixedly connected to the support cone wall 27 of the rotor-stator unit body 21 by bolts, and the installation position is located inside the disc cavity of the rotor-stator unit body 21. The rotor-stator unit body 21 includes a casing 22, a multi-stage rotor 25 and a multi-stage stator 26. The rotor 25 includes a turbine disk and moving blades. The rotors 25 are connected by bolts, and the stator 26 is installed on the casing 22 in the form of a card slot. Before the low-pressure turbine 20 is installed on the aircraft engine, the rotor 25 and the stator 26 are relatively independent, that is, in the case of Figure 1 In the state shown, there is no radial positioning and axial positioning between the stator 26 and the rotor 25. The rotor 25 and the stator 26 can only be positioned after the low-pressure turbine 20 is installed on the aircraft engine. Figure 1 In the embodiment, the mounting edge at the bottom of the casing 22 is the front mounting edge 23 , and correspondingly, the mounting edge at the top of the casing 22 is the rear mounting edge 24 .

[0051] Figure 2 This is a schematic diagram of the structure of the low-pressure turbine disassembly and assembly tool 10 provided in this embodiment when the low-pressure turbine 20 is horizontally assembled. Figure 3 The cross-sectional structure diagram of the low-pressure turbine disassembly and assembly tool 10 provided in this embodiment when horizontally assembling the low-pressure turbine 20 is shown in FIG. Figure 4 The schematic diagram of the structure of the low-pressure rotor-stator disassembly and assembly device 100 provided in this embodiment when the rotor-stator unit body 21 is supported in a horizontal state, Figure 5 The low-pressure rotor-stator disassembly and assembly device 100 provided in this embodiment supports the rotor-stator unit body 21 in a first vertical state. Figure 6 The low-pressure rotor-stator disassembly and assembly device 100 provided in this embodiment supports the rotor-stator unit body 21 in the second vertical state. Figure 1-Figure 6The present embodiment provides a low-pressure turbine disassembly and assembly tool 10, which includes a low-pressure rotor-stator disassembly and assembly device 100 and a low-pressure turbine shaft disassembly and assembly device 200, and the low-pressure turbine shaft disassembly and assembly device 200 is used to horizontally support the low-pressure turbine shaft 28. The low-pressure rotor-stator disassembly and assembly device 100 and the low-pressure turbine shaft disassembly and assembly device 200 are detachably connected. When the low-pressure rotor-stator disassembly and assembly device 100 and the low-pressure turbine shaft disassembly and assembly device 200 are assembled, the horizontal assembly requirement of the low-pressure turbine 20 can be met. After the low-pressure rotor-stator disassembly and assembly device 100 and the low-pressure turbine shaft disassembly and assembly device 200 are disassembled, the rotor-stator unit body 21 and the low-pressure turbine shaft 28 can be placed separately. The low-pressure rotor-stator disassembly and assembly device 100 includes a low-pressure rotor-stator support frame 110 and a low-pressure rotor-stator fixing fixture 120. The low-pressure rotor-stator fixing fixture 120 includes two rotating support members 126 arranged opposite to each other. The two rotating support members 126 are used to be installed on both radial sides of the rotor-stator unit body 21. The rotating support member 126 is used to rotate with the low-pressure rotor-stator support frame 110, so as to rotationally support the rotor-stator unit body 21 on the low-pressure rotor-stator support frame 110, so that the rotor-stator unit body 21 can be adjusted between a horizontal state and a vertical state. On the one hand, when the rotor-stator unit body 21 is in a horizontal state, the low-pressure turbine 20 can be horizontally assembled, and when the rotor-stator unit body 21 is in a vertical state, the low-pressure turbine 20 can be vertically assembled. On the other hand, when the low-pressure rotor-stator disassembly and assembly device 100 is used alone and the rotor-stator unit body 21 is in a vertical state, the rotor-stator unit body 21 can be measured, inspected, etc. In this way, the low-pressure turbine disassembly and assembly tool 10 can meet various requirements during the disassembly and assembly of the low-pressure turbine 20, reduce the types of special tools, and help reduce process costs. In addition, the structure can also realize the single crane flipping of the low-pressure turbine 20 when in use, reducing the requirements for the factory environment during off-site maintenance of the low-pressure turbine 20.

[0052] Furthermore, the low-pressure turbine disassembly and assembly tool 10 also includes a connecting beam 300, and the two ends of the connecting beam 300 are detachably connected to the low-pressure turbine shaft disassembly and assembly device 200 and the low-pressure rotor stator disassembly and assembly device 100, respectively, so as to realize the detachable connection between the low-pressure turbine shaft disassembly and assembly device 200 and the low-pressure rotor stator disassembly and assembly device 100, and at the same time, when the low-pressure turbine shaft disassembly and assembly device 200 and the low-pressure rotor stator disassembly and assembly device 100 are used separately, the protruding connecting beam 300 structure can be avoided to affect the use. It can be understood that in other embodiments, the connecting beam 300 can also be set to be non-detachably connected to the low-pressure turbine shaft disassembly and assembly device 200, or set to be non-detachably connected to the low-pressure rotor stator disassembly and assembly device 100.

[0053] In this embodiment, the rotating support member 126 includes a mounting seat 135, a first support shaft 127 and a second support shaft 128. The first support shaft 127 and the second support shaft 128 are installed side by side on the mounting seat 1351. The first support shaft 127 and the second support shaft 128 are both used to rotate with the low-pressure rotor-stator support frame 110, so that the low-pressure rotor-stator fixing fixture 120 can rotate around the axis of the first support shaft 127 or the axis of the second support shaft 128 relative to the low-pressure rotor-stator support member, so that the rotor-stator unit body 21 clamped on the low-pressure rotor-stator fixing fixture 120 can switch between a horizontal state and a vertical state.

[0054] Specifically, when the first support shaft 127 and the second support shaft 128 are both supported on the low-pressure rotor stator support frame 110 (such as Figure 4 When the low-pressure rotor-stator fixing fixture 120 is moved from the rotor-stator fixing fixture 120 to the rotor-stator fixing fixture 120, the rotor-stator fixing fixture 120 is moved from the rotor-stator fixing fixture 120 to the rotor-stator fixing fixture 120. Figure 1 The second support shaft 128 rotates relative to the low-pressure stator support frame 110 around the axis of the first support shaft 127 until the second support shaft 128 rotates to the position just above the first support shaft 127 (as shown in FIG. Figure 5 As shown in FIG. 1 , the rotor-stator unit body 21 is in a first vertical state, in which the front mounting edge 23 of the casing 22 of the rotor-stator unit body 21 faces upward and the rear mounting edge 24 faces downward. Figure 1 The first support shaft 127 rotates relative to the low-pressure stator support frame 110 around the axis of the second support shaft 128 until the first support shaft 127 rotates to the position just above the second support shaft 128 (as shown in FIG. Figure 6 ), the rotor-stator unit body 21 is in the second vertical state, at which time the front mounting edge 23 of the casing 22 of the rotor-stator unit body 21 faces downward and the rear mounting edge 24 faces upward. In other words, in this embodiment, the vertical state includes the first vertical state and the second vertical state.

[0055] Furthermore, the first support shaft 127 is also provided with a first positioning hole 129 and a second positioning hole 131, the low-pressure rotor stator support frame 110 is also provided with a third positioning hole (not shown in the figure), and the low-pressure rotor stator fixing fixture 120 also includes a positioning pin (not shown in the figure). When the first positioning hole 129 is aligned with the third positioning hole, and the positioning pin is inserted into the first positioning hole 129 and the third positioning hole, the relative positioning between the first support shaft 127 and the low-pressure rotor stator support frame 110 is achieved, and the first support shaft 127 is prevented from moving relative to the low-pressure rotor stator support frame 110. At this time, the low-pressure rotor stator fixing fixture 120 supports the rotor stator unit body 21 in a horizontal state. When the second positioning hole 131 is aligned with the third positioning hole, and the positioning pin is inserted into the second positioning hole 131 and the third positioning hole, the relative positioning between the first support shaft 127 and the low-pressure rotor-stator support frame 110 is achieved, and the first support shaft 127 is placed to move relative to the low-pressure rotor-stator support frame 110. At this time, the low-pressure rotor-stator fixing fixture 120 supports the rotor-stator unit body 21 in the first vertical state. If the position state of the rotor-stator unit body 21 needs to be adjusted later, the positioning pin can be removed. In this embodiment, four positioning holes are evenly arranged around the axis on the first support shaft 127, one of the four positioning holes is the first positioning hole 129, and the other of the fourth positioning hole 132 is the second positioning hole 131.

[0056] Furthermore, the first support shaft 127 includes a shaft body and two positioning plates 134 spaced apart at one end of the shaft body, positioning holes are opened on the two positioning plates 134, and when the first support shaft 127 cooperates with the low-pressure rotor stator support frame 110, the portion of the low-pressure rotor stator support frame 110 where the third positioning hole is set is clamped between the two positioning plates 134.

[0057] In this embodiment, the structure of the first support shaft 127 is consistent with that of the second support shaft 128. Accordingly, the second support shaft 128 is provided with a fourth positioning hole 132 and a fifth positioning hole 133, and the low-pressure rotor stator support frame 110 also has a sixth positioning hole (not shown). When the fourth positioning hole 132 is aligned with the sixth positioning hole, and the positioning pin is inserted in the fourth positioning hole 132 and the sixth positioning hole, the relative positioning between the second support shaft 128 and the low-pressure rotor stator support frame 110 is achieved, and the second support shaft 128 is prevented from moving relative to the low-pressure rotor stator support frame 110. At this time, the low-pressure rotor stator fixing fixture 120 supports the rotor stator unit body 21 in a horizontal state. When the fifth positioning hole 133 is aligned with the sixth positioning hole, and the positioning pin is inserted into the fifth positioning hole 133 and the sixth positioning hole, the relative positioning between the second support shaft 128 and the low-pressure rotor-stator support frame 110 is achieved, and the second support shaft 128 is placed to move relative to the low-pressure rotor-stator support frame 110. At this time, the low-pressure rotor-stator fixing clamp 120 supports the rotor-stator unit 21 in a second vertical state.

[0058] It should be noted that, in the present embodiment, in order to be able to position the rotor-stator unit 21 in a horizontal state, a first vertical state or a second vertical state by means of the low-pressure rotor-stator fixing clamp 120, the first support shaft 127 and the second support shaft 128 and the low-pressure rotor-stator support frame 110 are limited by positioning pins. It can be understood that in other embodiments, other limiting structures can also be used to achieve this.

[0059] Figure 7 The schematic diagram of the structure of the low-pressure rotor and stator fixing fixture 120 in the low-pressure turbine disassembly and assembly tool 10 provided in this embodiment is as follows: Figure 8 This is a schematic diagram of the partial structure of the low-voltage rotor-stator fixing fixture 120 provided in this embodiment clamping the rotor-stator unit body 21. Figure 1-Figure 8 In this embodiment, the low-pressure rotor-stator fixing fixture 120 also includes a fixing plate 121 and a rotor 25 fixing assembly. The fixing plate 121 is a roughly annular structure, which is fixedly connected to the rear mounting edge 24 of the casing 22, thereby fixing the stator 26 in the rotor-stator unit body 21. The rotor 25 fixing assembly is fixedly connected to the inner edge of the fixing plate 121, and the rotor 25 fixing assembly is used to be fixedly connected to the rotor 25 of the rotor-stator unit body 21, thereby fixing the rotor 25. In this way, the relatively independent rotors and stators are fixed into one by the low-pressure rotor-stator fixing fixture 120. The two rotating supports 126 are both fixedly connected to the fixing plate 121, and are relatively arranged on both sides of the radial direction of the fixing plate 121.

[0060] Specifically, a mounting portion 1211 protruding radially outward is provided on the fixed disk 121 along the circumferential direction, and the mounting portion 1211 is fixedly connected to the rear mounting edge 24 by bolts. In this embodiment, the fixed disk 121 has four mounting portions 1211, and the four mounting portions 1211 are evenly distributed, that is, the difference between adjacent mounting portions 1211 is 90 degrees, and the two rotating support members 126 are fixedly connected to the two oppositely arranged mounting portions 1211.

[0061] Further, the rotor 25 fixing assembly includes a support ring 122 and a plurality of hook blocks 123. The support ring 122 includes a ring tube portion 1222, a first connecting ring portion 1221 and a second connecting ring portion 1223. The first connecting ring portion 1221 and the second connecting ring portion 1223 are respectively arranged on both axial sides of the ring tube portion 1222, and the first connecting ring portion 1221 extends radially outwardly of the ring tube portion 1222, and the second connecting ring portion 1223 extends radially inwardly of the ring tube portion 1222. The first connecting ring portion 1221 is fixedly connected to the inner edge of the fixing disk 121, and the tube changing portion extends axially toward the inside of the rotor-stator unit body 21 of the fixing disk 121, so that the second connecting ring portion 1223 extends into the rotor-stator unit body 21. A plurality of hook blocks 123 are rotatably arranged on the second connecting ring portion 1223 along the circumferential direction of the support ring 122 , and the plurality of hook blocks 123 are respectively used to be clamped and fixed with the center of the last stage turbine disk of the rotor-stator unit body 21 , thereby realizing the concentric arrangement of the rotor 25 and the stator 26 .

[0062] Specifically, the hook block 123 is F-shaped. Before the rotor 25 is installed, the hook block 123 is set toward the axis. After the rotor 25 is installed, the hook block 123 is rotated so that the hook block 123 faces away from the axis, thereby clamping the disc center to achieve the fixation of the rotor 25 (such as Figure 8 shown).

[0063] Furthermore, the rotor 25 fixing assembly further includes an adjusting bolt 124 and a locking bolt 125. The locking bolt 125 passes through the first connecting ring portion 1221 and is screwed to the fixing plate 121, thereby locking and fixing the support ring 122 on the fixing plate 121. The adjusting bolt 124 is screwed to the first connecting ring portion 1221 and is used to abut against the axial end surface of the fixing plate 121, thereby adjusting the axial position of the support ring 122 relative to the fixing plate 121 (i.e., Figure 8 Specifically, during installation, the axial position of the support ring 122 is first adjusted to the desired position by adjusting the screws, and then the locking bolts 125 are tightened to achieve fastening between the support ring 122 and the fixing plate 121.

[0064] Fig. 9 The exploded structural diagram of the low-pressure turbine shaft disassembly and assembly device 200 provided in this embodiment is as follows: Fig.10 is a schematic cross-sectional view of the low-pressure turbine shaft disassembly and assembly device 200 provided in this embodiment, and Fig. 9 and Fig.10 The frame 210 is not shown. Figure 1-Figure 10In this embodiment, the low-pressure turbine shaft disassembly and assembly device 200 includes a frame 210, a horizontal sliding assembly 220 and a posture adjustment assembly 230. The frame 210 is detachably connected to the low-pressure rotor-stator disassembly and assembly device 100, and the posture adjustment assembly 230 is installed on the base 221 through the horizontal sliding assembly 220. The posture adjustment assembly 230 is used to horizontally support the low-pressure turbine shaft 28 and adjust the posture of the low-pressure turbine shaft 28, so that the low-pressure turbine shaft 28 supported on the posture adjustment assembly 230 can be aligned with the supporting cone wall 27 of the rotor-stator unit body 21 to ensure the assembly effect. The horizontal sliding assembly 220 is used to drive the posture adjustment assembly 230 to slide relative to the base 221, so that the low-pressure turbine shaft 28 is close to or away from the rotor-stator unit body 21 to meet the disassembly and assembly requirements.

[0065] Specifically, a moving wheel 211 is provided under the frame 210. When the connecting beam 300 is not installed, on the one hand, the low-pressure turbine shaft disassembly and assembly device 200 can be pushed away from the low-pressure rotor-stator disassembly and assembly device 100 to provide sufficient space for independent use. On the other hand, at this time, the low-pressure turbine shaft disassembly and assembly device 200 can be moved to achieve the alignment of the axis of the pressure turbine shaft and the rotor-stator unit 21 (left-right alignment, or vertical mid-section alignment), which diversifies the docking method and makes the operation more convenient.

[0066] Furthermore, the horizontal sliding assembly 220 includes a base 221 and an axial slide 224, the base 221 is fixedly mounted on the frame 210, and a groove 222 is provided on the base 221. The posture adjustment assembly 230 is mounted on the axial slide 224, and a boss 225 is provided below the axial slide 224, and the boss 225 is slidably matched with the groove 222. Specifically, the base 221 is roughly in the shape of a rectangular parallelepiped, and a groove 222 extending along the length direction of the base 221 is provided on its upper end surface, and after the low-pressure turbine shaft 28 is installed on the low-pressure turbine shaft disassembly and assembly device 200, the axis of the low-pressure turbine shaft 28 is consistent with the extension direction of the groove 222, so that by applying an external force to drive the axial slide 224 to slide along the extension direction of the groove 222, the low-pressure turbine shaft 28 can be driven to move along its own axial direction, so as to achieve alignment installation or separation with the rotor-stator unit 21.

[0067] Furthermore, the base 221 is also provided with an axial long groove 223, and the side of the boss 225 is provided with a plurality of stop pins 226, which are slidably matched with the axial long groove 223 to stop the boss 225 in the groove 222. Specifically, in order to prevent the base 221 from being separated from the axial slide seat 224, a plurality of stop pins 226 are further provided on the side of the boss 225, and the axial long groove 223 on the base 221 is provided on the left and right sides of the base 221, and the axial long groove 223 extends parallel to the groove 222. During installation, first insert the boss 225 into the groove 222, and then pass the limit pin 226 from the outside of the base 221 through the axial long groove 223 to connect with the boss 225. Part of the limit pin 226 is located in the axial long groove 223. The limit pin 226 limits the movement of the boss 225 relative to the base 221 in the up and down directions, thereby avoiding the problem of the boss 225 moving upward and falling out of the groove 222 of the base 221.

[0068] Please continue to refer to Figure 1-10 In this embodiment, the posture adjustment assembly 230 includes a height adjustment structure, and the height posture of the low-pressure turbine shaft 28 is adjusted by the height adjustment structure. Optionally, the height adjustment structure includes a support seat 231 and a wedge-shaped slider 234, the support seat 231 is provided with a first abutting inclined surface 232 and a second abutting inclined surface 233, the wedge-shaped slider 234 is installed on the horizontal sliding assembly 220, and has a third abutting inclined surface 235 abutting with the first abutting inclined surface 232, the horizontal sliding assembly 220 is provided with a fourth abutting inclined surface 227 abutting with the second abutting inclined surface 233, and the wedge-shaped slider 234 is used to move the support seat 231 up and down to move close to or away from the fourth abutting inclined surface 227, so as to adjust the height posture of the low-pressure turbine shaft 28.

[0069] Specifically, an inverted trapezoidal convex structure is provided below the support seat 231, and the first abutting inclined surface 232 and the second abutting inclined surface 233 form two waists of the inverted trapezoid, that is, the first abutting inclined surface 232 and the second abutting inclined surface 233 are inclined in opposite directions. The upper end surface of the axial slide seat 224 of the horizontal sliding assembly 220 is provided with a right-angled trapezoidal convex portion, which is located at one end in the length direction of the axial slide seat 224, and the wedge-shaped slider 234 is arranged opposite to the convex portion, and the wall surface of the convex portion facing the wedge-shaped slider 234 is an inclined surface, which forms a fourth abutting inclined surface 227 that abuts against the second abutting inclined surface 233, and the wall surface of the wedge-shaped slider 234 facing the convex portion is an inclined surface, which forms a third abutting inclined surface 235 that abuts against the first abutting inclined surface 232.

[0070] When the wedge-shaped slider 234 slides relative to the axial slide 224 to approach or move away from the fourth abutting inclined surface 227, the distance between the third abutting inclined surface 235 and the fourth abutting inclined surface 227 decreases or increases, and accordingly, an upward abutting force is applied to the support seat 231 to make the support seat 231 move upward, or the third abutting inclined surface 235 has a tendency to break away from the first abutting inclined surface 232, and as the wedge-shaped slider 234 moves in a direction away from the fourth abutting inclined surface 227, the support seat 231 moves downward under the action of its own gravity. It can be understood that in other embodiments, other structures for realizing the up and down movement of the support seat 231 can also be used to achieve the adjustment of the height position of the low-pressure turbine shaft 28.

[0071] Furthermore, the posture adjustment assembly 230 further includes a screw 236, which is screwed to the wedge-shaped slider 234, and the wedge-shaped slider 234 is driven to move relatively close to or away from the fourth abutting inclined surface 227 by the rotation of the screw 236. Specifically, baffle portions 228 are relatively spaced apart on the upper side of the axial slide 224, and the protrusion of the fourth abutting inclined surface 227 is located between the two baffle portions 228, and the two baffle portions 228 form a sliding groove for the wedge-shaped slider 234 to move toward or away from the fourth abutting inclined surface 227, that is, the position of the wedge-shaped slider 234 is limited by the two baffle portions 228. The screw rod 236 passes through the protrusion and is screwed to the wedge slider 234, thereby forming a screw mechanism. Specifically, when the screw rod 236 rotates relative to the wedge slider 234, the rotational movement of the wedge slider 234 is restricted by the two baffle portions 228, so that the wedge slider 234 generates a sliding movement along the axis of the screw rod 236, and then approaches or moves away from the fourth top slope 227.

[0072] Furthermore, a retaining ring 237 is provided at one end of the screw rod 236, and the retaining ring 237 is fixed to the support seat 231 by bolts. At the same time, the retaining ring 237 can be connected to the screw rod 236 by means of clamping, etc., which ensures that the screw rod 236 can rotate relative to the support seat 231, and limits the movement of the screw rod 236 along its own axial direction relative to the support seat 231.

[0073] In this embodiment, the posture adjustment assembly 230 also includes an angle adjustment structure, which rotatably supports the low-pressure turbine shaft 28, so that the angular posture of the low-pressure turbine shaft 28 is adjusted by rotating the low-pressure turbine shaft 28 around its own axis.

[0074] Optionally, the angle adjustment structure includes two support assemblies 238, which are arranged at intervals on the height adjustment structure and are used to support both ends of the low-pressure turbine shaft 28, that is, the low-pressure turbine shaft 28 is installed on the posture adjustment assembly 230 through two supports. Specifically, the two support assemblies 238 are arranged at intervals on the support seat 231.

[0075] The support assembly 238 includes a top support wheel 239 and two bottom support wheels 241. The top support wheel 239 and the two bottom support wheels 241 clamp the low-pressure turbine shaft 28 at three points. This structure is used to clamp the low-pressure turbine shaft 28, so that the low-pressure turbine shaft 28 can rotate around its own axis under the action of external force, thereby achieving angular position adjustment and ensuring that the bolt holes on the low-pressure turbine shaft 28 can be aligned with the connecting holes of the support cone wall 27.

[0076] Furthermore, the support assembly 238 further includes a clamping frame 242, on which the top support wheel 239 is rotatably mounted, and the clamping frame 242 is detachably connected to the height adjustment structure by bolts. Specifically, the clamping frame 242 is U-shaped, with two free ends facing downward, and is detachably connected to the support seat 231 by bolts, while the inverted U-shaped structure forms a space for the low-pressure turbine shaft 28 to pass through, and the two bottom support wheels 241 are rotatably mounted on the support seat 231.

[0077] The low-pressure turbine disassembly and assembly tool 10 provided by the embodiment of the present invention, when used, on the one hand, when the connecting beam 300 is not installed, the low-pressure turbine shaft disassembly and assembly device 200 and the low-pressure rotor-stator disassembly and assembly device 100 can be used separately to meet the storage requirements, and at the same time, the low-pressure rotor-stator disassembly and assembly device 100 can adjust the state of the rotor-stator unit body 21 clamped and fixed thereon (horizontal state and two vertical states) to cope with the various placement requirements of the rotor-stator of the low-pressure turbine 20, such as meeting the assembly operation of the rotor-stator unit body 21 in different states, measuring the axial dimension and checking the state of the rotor-stator unit body 21, etc. At the same time, in the first vertical state, the decomposition space of the low-pressure turbine 20 is more open and easy to operate. Moreover, if the rotor-stator unit body 21 is clamped in the first vertical state, it can also be combined with a crane to adopt a vertical assembly method to assemble the low-pressure turbine 20, and accordingly, the vertical disassembly of the low-pressure turbine 20 can also be achieved.

[0078] On the other hand, if the low-pressure turbine shaft disassembly and assembly device 200 and the low-pressure rotor-stator disassembly and assembly device 100 are connected together by the connecting beam 300, the low-pressure turbine 20 can be assembled in a horizontal manner, and accordingly, the horizontal disassembly of the pressure turbine can also be achieved. At the same time, the low-pressure turbine shaft 28 can be pre-fixed on the rotor-stator unit body 21 by horizontal assembly, and then the rotor-stator unit body 21 is turned up to the first vertical state, so that the installation and force-limiting space of the bolts and nuts connecting the low-pressure turbine shaft 28 and the rotor-stator are more open and easy to operate. Moreover, during horizontal assembly, the height position and angle position of the low-pressure turbine shaft 28 can be adjusted by the low-pressure turbine shaft disassembly and assembly device 200 to ensure that the axis of the low-pressure turbine shaft 28 is aligned with the axis of the rotor-stator unit body 21, and then the low-pressure turbine shaft 28 is transferred to the position of assembly with the rotor-stator unit body 21 by axial sliding.

[0079] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A low-pressure turbine disassembly and assembly tool, characterized in that: The low-pressure turbine disassembly and assembly tool comprises: A low-pressure rotor-stator disassembly and assembly device, the low-pressure rotor-stator disassembly and assembly device comprising a low-pressure rotor-stator support frame and a low-pressure rotor-stator fixing fixture, the low-pressure rotor-stator fixing fixture comprising two rotating support members arranged opposite to each other, the two rotating support members being used to be installed on both radial sides of a rotor-stator unit body, the rotating support members being used to rotatably cooperate with the low-pressure rotor-stator support frame to rotatably support the rotor-stator unit body on the low-pressure rotor-stator support frame, so that the rotor-stator unit body can be adjusted between a horizontal state and a vertical state; and A low-pressure turbine shaft disassembly and assembly device is used to horizontally support the low-pressure turbine shaft; the low-pressure turbine shaft disassembly and assembly device is detachably connected to the low-pressure rotor and stator disassembly and assembly device.

2. The low-pressure turbine disassembly and assembly tool according to claim 1, characterized in that: The rotating support member includes a mounting seat, a first supporting shaft and a second supporting shaft, wherein the first supporting shaft and the second supporting shaft are mounted side by side on the mounting seat, and the first supporting shaft and the second supporting shaft are both used for rotationally cooperating with the low-pressure rotor stator support frame, so that the low-pressure rotor stator fixing fixture can rotate relative to the low-pressure rotor stator support frame around the axis of the first supporting shaft or the axis of the second supporting shaft; Among them, when the first support shaft and the second support shaft are both supported on the low-pressure rotor-stator support frame, the rotor-stator unit is in a horizontal state; when the first support shaft is supported on the low-pressure rotor-stator support frame and the second support shaft is located on the upper side of the first support shaft, the rotor-stator unit is in a first vertical state; when the second support shaft is supported on the low-pressure rotor-stator support frame and the first support shaft is located on the upper side of the second support shaft, the rotor-stator unit is in a second vertical state.

3. The low-pressure turbine disassembly and assembly tool according to claim 2, characterized in that: The first support shaft is provided with a first positioning hole and a second positioning hole, and the low-pressure rotor stator support frame is provided with a third positioning hole; the low-pressure rotor stator fixing fixture also includes a positioning pin, and the first positioning hole and the second positioning hole are respectively used to cooperate with the third positioning hole through the positioning pin to limit the relative position of the first support shaft and the low-pressure rotor stator support frame; Among them, when the positioning pin is inserted into the first positioning hole and the third positioning hole, the low-pressure rotor-stator fixing clamp supports the rotor-stator unit body in the horizontal state; when the positioning pin is inserted into the second positioning hole and the third positioning hole, the low-pressure rotor-stator fixing clamp supports the rotor-stator unit body in the first vertical state.

4. The low-pressure turbine disassembly and assembly tool according to claim 2, characterized in that: A fourth positioning hole and a fifth positioning hole are provided on the second support shaft, and a sixth positioning hole is provided on the low-pressure rotor stator support frame; the low-pressure rotor stator fixing fixture also includes a positioning pin, and the fourth positioning hole and the fifth positioning hole are respectively used to cooperate with the sixth positioning hole through the positioning pin to limit the relative position of the second support shaft and the low-pressure rotor stator support frame; Among them, when the positioning pin is inserted into the fourth positioning hole and the sixth positioning hole, the low-pressure rotor-stator fixing clamp supports the rotor-stator unit body in the horizontal state; when the positioning pin is inserted into the fifth positioning hole and the sixth positioning hole, the low-pressure rotor-stator fixing clamp supports the rotor-stator unit body in the second vertical state.

5. The low-pressure turbine disassembly and assembly tool according to claim 1, characterized in that: The low-pressure rotor-stator fixing fixture also includes a fixing disk and a rotor fixing assembly. The fixing disk is annular and is used to be fixedly connected to the rear mounting edge of the rotor-stator unit body; the rotor fixing assembly is fixedly connected to the inner edge of the fixing disk, and the rotor fixing assembly is used to be fixedly connected to the rotor of the rotor-stator unit body; the two rotating supports are both fixedly connected to the fixing disk and are relatively arranged on both radial sides of the fixing disk.

6. The low-pressure turbine disassembly and assembly tool according to claim 5, characterized in that: The rotor fixing assembly includes a support ring and a plurality of hook blocks; the support ring includes a ring tube portion, a first connecting ring portion and a second connecting ring portion, the first connecting ring portion and the second connecting ring portion are respectively arranged on both axial sides of the ring tube portion, and the first connecting ring portion extends radially outward along the ring tube portion, and the first connecting ring portion is fixedly connected to the inner edge of the fixed disk; the second connecting ring portion extends radially inward along the ring tube portion; the plurality of hook blocks are arranged on the second connecting ring portion along the circumferential rotation of the support ring, and the plurality of hook blocks are respectively used to be clamped and fixed with the center of the last-stage turbine disk of the rotor-stator unit.

7. The low-pressure turbine disassembly and assembly tool according to claim 6, characterized in that: The rotor fixing assembly also includes an adjusting bolt and a locking bolt. The locking bolt passes through the first connecting ring portion and is threadedly connected to the fixing disk to lock and fix the support ring on the fixing disk. The adjusting bolt is threadedly connected to the first connecting ring portion and is used to abut against the axial end face of the fixing disk to adjust the axial position of the support ring relative to the fixing disk.

8. The low-pressure turbine disassembly and assembly tool according to claim 1, characterized in that: The low-pressure turbine shaft disassembly and assembly device includes a frame, a horizontal sliding assembly and a posture adjustment assembly. The frame is detachably connected to the low-pressure rotor-stator disassembly and assembly device. The posture adjustment assembly is installed on the frame through the horizontal sliding assembly. The posture adjustment assembly is used to horizontally support the low-pressure turbine shaft and adjust the posture of the low-pressure turbine shaft so that the low-pressure turbine shaft is aligned with the supporting cone wall of the rotor-stator unit body; the horizontal sliding assembly is used to drive the posture adjustment assembly to slide relative to the frame so that the low-pressure turbine shaft is close to or away from the rotor-stator unit body to meet the disassembly and assembly requirements.

9. The low-pressure turbine disassembly and assembly tool according to claim 8, characterized in that: The horizontal sliding assembly includes a base and an axial slide seat, the base is fixedly mounted on the frame and is provided with a groove; the posture adjustment assembly is mounted on the axial slide seat, and a boss is provided below the axial slide seat, and the boss is slidably engaged with the groove.

10. The low-pressure turbine disassembly and assembly tool according to claim 9, characterized in that: The base is also provided with an axial long groove, and the side edge of the boss is protruding with a plurality of limiting pins, and the limiting pins are slidably matched with the axial long groove to limit the boss in the groove.

11. The low-pressure turbine disassembly and assembly tool according to claim 8, characterized in that: The posture adjustment component includes a height adjustment structure, and the height adjustment structure is used to adjust the height posture of the low-pressure turbine shaft.

12. The pressure turbine disassembly and assembly tool according to claim 11, characterized in that: The height adjustment structure includes a support seat and a wedge-shaped slider, the support seat is provided with a first abutting inclined surface and a second abutting inclined surface, the wedge-shaped slider is installed on the horizontal sliding assembly and has a third abutting inclined surface abutting and cooperating with the first abutting inclined surface, the horizontal sliding assembly is provided with a fourth abutting inclined surface abutting and cooperating with the second abutting inclined surface, the wedge-shaped slider is used to approach or move away from the fourth abutting inclined surface to drive the support seat to move up and down to adjust the height position of the low-pressure turbine shaft.

13. The low-pressure turbine disassembly and assembly tool according to claim 12, characterized in that: The posture adjustment component also includes a screw rod, which is threadedly connected to the wedge-shaped slider and is used to drive the wedge-shaped slider to move relatively closer to or away from the fourth abutting inclined surface through the rotation of the screw rod.

14. The pressure turbine disassembly and assembly tool according to claim 13, characterized in that: The posture adjustment assembly also includes a retaining ring, which is rotatably disposed on the screw rod and fixedly connected to the support seat to limit the movement of the screw rod relative to the support seat along the axial direction of the screw rod.

15. The low-pressure turbine disassembly and assembly tool according to claim 11, characterized in that: The posture adjustment assembly further includes an angle adjustment structure, which is used to rotatably support the low-pressure turbine shaft so as to adjust the angular posture by rotating the low-pressure turbine shaft around the axis of the low-pressure turbine shaft.

16. The pressure turbine disassembly and assembly tool according to claim 15, characterized in that: The angle adjustment structure comprises two support assemblies, which are arranged at intervals on the height adjustment structure and are used to support both ends of the low-pressure turbine shaft; The support assembly comprises a top support wheel and two bottom support wheels, wherein the top support wheel and the two bottom support wheels clamp the low-pressure turbine shaft in a three-point manner.

17. The low-pressure turbine disassembly and assembly tool according to claim 15, characterized in that: The support assembly also includes a pressing frame, the top support wheel is rotatably mounted on the pressing frame, and the pressing frame is detachably connected to the height adjustment structure via bolts.

18. The low-pressure turbine disassembly and assembly tool according to claim 1, characterized in that: The low-pressure turbine disassembly and assembly tool also includes a connecting beam, and two ends of the connecting beam are detachably connected to the low-pressure turbine shaft disassembly and assembly device and the low-pressure rotor and stator disassembly and assembly device respectively.

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