A turbine shaft and front bearing shaft disassembly device

Abstract

This invention belongs to the technical field of separation devices, specifically relating to a device for disassembling a turbine shaft and a front bearing shaft. The device includes a base, a turbine shaft fixing component, an adapter, and a torque output mechanism. The turbine shaft fixing component secures the turbine shaft. The adapter is connected to the output end of the torque output mechanism and has a axial connection structure for drive connection with the front bearing shaft. The turbine shaft, adapter, and torque output mechanism are located on the same straight line. The torque output mechanism outputs torque to drive the front bearing shaft to rotate. Because the turbine shaft fixing component, adapter, and torque output mechanism are on the same straight line, their concentricity is ensured. This results in no radial component in the torque output by the torque output mechanism, guaranteeing the concentricity and circumferential runout accuracy of the turbine shaft. At this point, the front bearing shaft and turbine shaft remain coaxial, reducing the resistance to actual disassembly and allowing for smooth and damage-free separation.

Description

Technical Field

[0001] This invention belongs to the field of separation device technology, specifically relating to a device for separating a turbine shaft from a front bearing shaft. Background Technology

[0002] When the auxiliary power unit (APU) is disassembled and maintained at the factory, separating the turbine shaft from the front bearing shaft is a critical and challenging process. In actual maintenance, the APU power section operates in a high-temperature environment for extended periods, making it highly susceptible to severe adhesion and seizing of the connecting threads between the turbine shaft and the front bearing shaft due to insufficient application of anti-seize agent on the threaded mating surfaces during initial assembly. This results in an abnormally tight and secure connection between the two.

[0003] To separate the turbine shaft from the front bearing shaft, current methods often use a vise to clamp two nuts with opposite directions of rotation at one end of the turbine shaft, while applying torque to the front bearing shaft at the other end. However, it is difficult to guarantee pure torque input when applying torque, and radial force is inevitably generated. The turbine shaft is a precision, slender shaft component. Under the cantilevered force application method with forces at both ends and a large span, this radial force will cause the turbine shaft to bend and deform, severely damaging the concentricity and circumferential runout accuracy between the components. The loss of concentricity and circumferential runout will lead to a sharp increase in disassembly resistance, causing the turbine shaft and the front bearing shaft to seize completely. Existing devices are simply unable to separate the two, and sometimes it is even necessary to damage the front bearing shaft to preserve the integrity of the turbine shaft and its continued use. Summary of the Invention

[0004] The purpose of this invention is to provide a disassembly device for the turbine shaft and the front bearing shaft, so as to solve the problem that existing disassembly devices affect the circumferential runout value of the turbine shaft during disassembly, making it difficult to separate the turbine shaft and the front bearing shaft.

[0005] A device for disassembling a turbine shaft and a front bearing shaft according to the present invention includes a base, a turbine shaft fixing component, a torque output mechanism, and an adapter. The turbine shaft fixing component and the torque output mechanism are mounted on the base. The adapter is connected to the output end of the torque output mechanism. The adapter is provided with a shaft-side connection structure for transmission connection with the front bearing shaft. The turbine shaft fixing component, the adapter, and the torque output mechanism are arranged along the same straight line. The turbine shaft fixing component is used to fix the turbine shaft. The torque output mechanism is used to output torque and transmit the torque to the front bearing shaft through the adapter, so that the front bearing shaft rotates relative to the turbine shaft.

[0006] Furthermore, the turbine shaft fixing component includes an end fixing assembly, which includes a first stop nut and a second stop nut threadedly connected to the turbine shaft, and a fixing plate disposed on the base. The fixing plate is provided with a channel through which the turbine shaft can pass. The first stop nut and the second stop nut are respectively arranged on both sides of the fixing plate, and the threads of the first stop nut and the second stop nut are opposite in direction so that they move simultaneously toward the fixing plate when screwed.

[0007] Furthermore, the channel is a vertical channel with a top opening provided on the fixed plate, and the end fixing assembly also includes a limiting nut installed on the turbine shaft and located between the first stop nut and the second stop nut, the limiting nut being used to engage in the vertical channel.

[0008] Furthermore, the turbine shaft fixing component also includes a central clamping assembly, which is disposed between the end fixing assembly and the torque output mechanism. The central clamping assembly includes a clamping upright plate disposed on the base and a splicing plate for fixing on the clamping upright plate. The clamping upright plate and the splicing plate are respectively provided with an upright plate fastening groove and a splicing plate fastening groove at their corresponding edges. When the upright plate fastening groove and the splicing plate fastening groove are fastened, the turbine shaft can be tightened radially to achieve the fixing of the turbine shaft.

[0009] Furthermore, the central clamping components are arranged in groups and positioned on the base at a location corresponding to the thickened node of the turbine shaft.

[0010] Furthermore, the clamping plate and the splicing plate are fixed to each other by bolts.

[0011] Furthermore, the axial connection structure of the adapter is keyed to the front bearing shaft; the adapter is connected to the torque output mechanism via an output-side connection structure, which is keyed to the torque output mechanism.

[0012] Furthermore, both the shaft-side connection structure and the output-side connection structure are spline structures, and both the adapter and the torque output mechanism are provided with corresponding spline groove structures; or both the shaft-side connection structure and the output-side connection structure are spline groove structures, and both the adapter and the torque output mechanism are provided with corresponding spline structures.

[0013] Furthermore, the torque output mechanism is a rotary hydraulic cylinder.

[0014] Furthermore, the base is made of cast iron.

[0015] In this invention, the turbine shaft fixing component, the adapter component, and the torque output mechanism of the disassembly device are arranged along the same straight line. During use, the turbine shaft fixing component secures the turbine shaft, and when the torque output mechanism outputs torque, it drives the front bearing shaft to rotate via the adapter component. The front bearing shaft and the turbine shaft rotate relative to each other, thus achieving separation. Because the turbine shaft fixing component, the adapter component, and the torque output mechanism are located on the same straight line, their concentricity is ensured. This results in no radial component in the output torque of the torque output mechanism, ensuring that the concentricity and circumferential runout accuracy of the turbine shaft are not affected. At this time, the front bearing shaft and the turbine shaft always remain coaxial, reducing the resistance to actual disassembly and allowing for smooth and damage-free separation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the turbine shaft and front bearing shaft disassembly device of the present invention for disassembling the turbine shaft and the front bearing shaft. Figure 2 for Figure 1 A diagram from another perspective; Figure 3 This is a schematic diagram of the base, fixing plate, and clamping plate of the disassembly device for turbine shaft and front bearing shaft according to the present invention. Figure 4 This is a schematic diagram of the assembly plate of the disassembly device for turbine shaft and front bearing shaft according to the present invention; Figure 5 This is a structural schematic diagram of the turbine shaft and the front bearing shaft. Figure 6 This is a schematic diagram of the structure of the adapter of the disassembly device for turbine shaft and front bearing shaft according to the present invention; Figure 7 This is a schematic diagram of the structure of the first stop nut, the second stop nut, and the limiting nut of the disassembly device for the turbine shaft and the front bearing shaft of the present invention. Figure 8 This is a schematic diagram of the torque output mechanism of a turbine shaft and front bearing shaft separation device according to the present invention.

[0017] In the diagram, 1 is the base; 2 is the adapter; 21 is the shaft-side connection structure; 22 is the output-side connection structure; 3 is the torque output mechanism; 4 is the turbine shaft; 5 is the front bearing shaft; 6 is the first stop nut; 7 is the second stop nut; 8 is the fixed upright plate; 9 is the vertical channel; 10 is the limit nut; 11 is the clamping upright plate; 111 is the upright plate fastening groove; 12 is the splicing plate; and 121 is the splicing plate fastening groove. Detailed Implementation

[0018] The core concept of this invention is to arrange the turbine shaft fixing component, the adapter component, and the torque output mechanism along the same straight line. In use, the turbine shaft fixing component secures the turbine shaft, and the torque output mechanism outputs torque, which drives the front bearing shaft to rotate through the adapter component. The front bearing shaft and the turbine shaft rotate relative to each other to achieve separation. Because the turbine shaft fixing component, the adapter component, and the torque output mechanism are located on the same straight line, their concentricity is ensured, resulting in no radial component force in the output torque of the torque output mechanism. This ensures that the concentricity and circumferential runout accuracy of the turbine shaft are not compromised. At this time, the front bearing shaft and the turbine shaft always maintain a coaxial state, reducing the resistance to actual disassembly and allowing for smooth and damage-free separation.

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] The present invention provides a device for disassembling the turbine shaft and the front bearing shaft, as follows: Figure 1 As shown, the device includes a base 1, a turbine shaft fixing component, a torque output mechanism 3, and an adapter 2. The turbine shaft fixing component and the torque output mechanism 3 are mounted on the base 1. The adapter 2 is mounted on the output end of the torque output mechanism 3. The adapter 2 is provided with a shaft-side connection structure 21 for transmission connection with the front bearing shaft 5. The turbine shaft fixing component is used to fix the turbine shaft as shown. Figure 5 The turbine shaft 4 shown is designed to prevent rotation of the turbine shaft 4. For example... Figure 8The torque output mechanism 3 shown is used to output torque and transmits the torque to the front bearing shaft 5 through the adapter 2. This allows the front bearing shaft 5 to rotate relative to the turbine shaft 4, facilitating their separation. Because the turbine shaft fixing component, adapter 2, and torque output mechanism 3 are located on the same straight line, their concentricity is ensured. This results in no radial component in the output torque of the torque output mechanism 3, guaranteeing that the concentricity and circumferential runout accuracy of the turbine shaft 4 are unaffected. Thus, the front bearing shaft 5 and turbine shaft 4 remain coaxial, reducing the resistance to actual disassembly and enabling smooth, damage-free separation. This significantly improves the reusability of precision components, saves on aviation material costs, greatly enhances separation efficiency, and simplifies the separation process.

[0023] The turbine shaft retainer includes an end retaining assembly, which includes, for example, an end retaining assembly. Figure 2 The first locking nut 6 and the second locking nut 7 are shown, along with the fixed plate 8 on the base 1. The fixed plate 8 has a channel through which the turbine shaft 4 can pass. The first locking nut 6 and the second locking nut 7 are respectively fitted onto the two sides of the turbine shaft 4 corresponding to the fixed plate 8, and the threads of the first locking nut 6 and the second locking nut 7 have opposite directions of rotation so that they move simultaneously towards the fixed plate 8 during tightening. Furthermore, the axial projections of the first locking nut 6, the second locking nut 7, and the fixed plate 8 overlap. Thus, after tightening, the first locking nut 6 and the second locking nut 7 are pressed tightly against the fixed plate 8, achieving reliable positioning of the turbine shaft 4. The first locking nut 6 and the second locking nut 7, relying on their opposite threads, form a reliable self-locking anti-loosening structure, ensuring the axial positioning of the turbine shaft 4. At the same time, their simple structure and convenient disassembly and assembly facilitate subsequent debugging and maintenance.

[0024] like Figure 3 As shown, the channel is a vertical channel 9 with an opening at the top, provided on the fixed plate 8. The opening at the top of the vertical channel 9 allows the turbine shaft 4 to be directly inserted from above, significantly improving assembly efficiency. The diameters of the first stop nut 6 and the second stop nut 7 are larger than the width of the vertical channel 9 to ensure proper fit between the two stop nuts and the fixed plate 8. The turbine shaft fixing component also includes... Figure 2 , Figure 7The limiting nut 10 shown is used to fit onto the turbine shaft 4 and is located between the first stop nut 6 and the second stop nut 7. The limiting nut 10 is used to engage in the vertical channel 9. The limiting nut 10 of the present invention is a hexagonal nut. The limiting nut 10 is engaged in the vertical channel 9 of the fixed plate 8 and cooperates with the vertical channel 9 to prevent circumferential rotation of the turbine shaft 4. At the same time, the thickness of the limiting nut 10 is the same as the thickness of the fixed plate 8. After the first stop nut 6 and the second stop nut 7 are screwed into place, the two opposite sides of the first stop nut 6 and the second stop nut 7 press against the two end faces of the limiting nut 10, which can anchor the limiting nut 10 to the fixed plate 8, thus achieving reliable fixation of the turbine shaft 4.

[0025] The turbine shaft fixing component also includes a central clamping assembly, which is disposed between the end fixing assembly and the torque output mechanism 3. The central clamping assembly includes a clamping upright plate 11 mounted on the base 1, and a splicing plate 12 for fixing to the clamping upright plate 11. Both the clamping upright plate 11 and the splicing plate 12 are made of aluminum. The clamping upright plate 11 and the splicing plate 12 have corresponding edge clamping grooves 111 and 121, respectively. Figure 3 As shown, the upright plate fastening groove 111 is a semi-circular fastening groove that clamps the top of the upright plate 11, as... Figure 4 As shown, the splicing plate fastening groove 121 is a semi-circular fastening groove provided at the lower end of the splicing plate 12. When the upright plate fastening groove 111 and the splicing plate fastening groove 121 are fastened together, the turbine shaft 4 can be tightened radially. In this way, the torsional elastic deformation that the turbine shaft 4 is prone to under the action of huge reverse torque is effectively curbed, ensuring the accuracy of the turbine shaft 4. The clamping upright plate 11 and the splicing plate 12 are fixed to each other by bolts. Specifically, the clamping upright plate 11 is provided with a threaded hole at the top, and the splicing plate 12 is provided with a bolt through hole. The bolt passes through the bolt through hole and is screwed into the threaded hole to fix the clamping upright plate 11 and the splicing plate 12. The bolts are easy to disassemble and assemble. After one set of turbine shafts 4 and front bearing shafts 5 are separated, the bolts can be removed to replace another set of turbine shafts 4 and front bearing shafts 5. At the same time, the bolts ensure the connection strength between the two, that is, ensure the tightness of the middle clamping assembly for the turbine shaft 4, and prevent the turbine shaft 4 from deforming under torque. In one embodiment, the clamping upright plate 11 and the splicing plate 12 can also be detachably connected by snap-fit. In another embodiment, the central clamping assembly can be a clamp, the inner ring of which is adapted to the size of the turbine shaft 4, and the turbine shaft 4 is clamped tightly by the clamp.

[0026] The central clamping components are arranged in groups and positioned on the base 1 at the location corresponding to the thickened node of the turbine shaft 4. For example... Figure 1As shown, three sets of central clamping assemblies are provided, sequentially positioned at the three thickened nodes of the turbine shaft 4. In this way, the central clamping assemblies can constrain the positions of the thickened nodes of the turbine shaft 4 along its length, greatly suppressing mid-section torsional deformation of the turbine shaft 4 under torque. In another embodiment, the central clamping assemblies can be located on the shaft portion of the turbine shaft 4 outside the thickened nodes, as long as they can clamp the shaft portion of the turbine shaft 4 and prevent mid-section torsional deformation. Of course, the number of central clamping assemblies is not specifically limited; in other embodiments, the number of central clamping assemblies can be adjusted according to actual conditions.

[0027] like Figure 6 As shown, the adapter 2 is provided with an output-side connection structure 22 for transmission connection with the output end of the torque output mechanism 3. The adapter 2 is mounted on the output end of the torque output mechanism 3 through the output-side connection structure 22. Specifically, the output-side connection structure 22 of the adapter 2 is a spline structure (not shown in the figure), and the output end of the torque output mechanism 3 is provided with an output-side spline groove (not shown in the figure). The shaft-side connection structure 21 of the adapter 2 is also a spline structure (not shown in the figure), and the end face of the front bearing shaft 5 is provided with a shaft-side spline groove for mating with the spline structure. The spline structure can ensure the alignment of the connection and can also transmit a large torque. In this way, the adapter 2 can reliably transmit the torque output by the torque output mechanism 3 to the front bearing shaft 5. In one embodiment, the shaft-side connection structure and the output-side connection structure of the adapter can also be a flat key structure, and the adapter and the torque output mechanism are provided with corresponding flat keyway structures; in another embodiment, the shaft-side connection structure and the output-side connection structure can both be spline groove structures, and the adapter and the torque output mechanism are provided with corresponding spline structures, as long as it is ensured that the adapter can transmit the torque output by the torque output mechanism 3 to the front bearing shaft.

[0028] The torque output mechanism 3 is a rotary hydraulic cylinder. The rotary hydraulic cylinder has a relatively stable overall rotational speed and can output a large torque, reliably separating the turbine shaft 4 and the front bearing shaft 5. During operation, simply installing the turbine shaft 4 and the front bearing shaft 5 onto the disassembly device and driving the torque output mechanism 3 achieves separation. This simple operation reduces the risk of injury and significantly improves work efficiency. Alternatively, in another embodiment, the torque output mechanism 3 can also be a rotary motor.

[0029] The base 1 is made of cast iron. Cast iron base 1 has excellent rigidity and vibration absorption properties, effectively suppressing vibrations and impacts generated during the operation of mechanisms such as rotary hydraulic cylinders, ensuring the overall installation base remains stable and undeformed. Of course, in another embodiment, the base 1 can also be made of alloy material, as long as the structural strength is reliable.

[0030] In specific operation: Install the first stop nut 6, the limit nut 10, and the second stop nut 7 on the threaded end of the turbine shaft 4, and install the adapter 2 on the front bearing shaft 5; then, install the turbine shaft 4 with the adapter 2 and each nut on the base 1: first, connect the output side connection structure 22 of the adapter shaft to the output end of the rotary hydraulic cylinder, and at this time, it is also necessary to ensure that the three thickened nodes of the turbine shaft correspond to the vertical plate fastening grooves 111 of the three clamping vertical plates 11 respectively, and that the limit nut 10 is snapped into the vertical channel 9; then, screw the first stop nut 6 and the second stop nut 7 so that they are pressed against the fixed vertical plate 8, and fix the splicing plate 12 on the clamping vertical plate 11, thereby fixing the turbine shaft 4; finally, start the rotary hydraulic cylinder to make the front bearing shaft 5 rotate relative to the turbine shaft 4 to separate the two.

[0031] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any way. Although this application has disclosed preferred embodiments as above, it is not intended to limit this application. Any person skilled in the art can make some modifications or alterations to the disclosed technical content to create equivalent embodiments without departing from the scope of the technical solution of this application. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall fall within the scope of the technical solution of this application.

Claims

1. A device for disassembling a turbine shaft and a front bearing shaft, characterized in that: The device includes a base (1), a turbine shaft fixing component, a torque output mechanism (3), and an adapter (2). The turbine shaft fixing component and the torque output mechanism (3) are mounted on the base (1). The adapter (2) is connected to the output end of the torque output mechanism (3). The adapter (2) is provided with a shaft-side connection structure (21) for transmission connection with the front bearing shaft (5). The turbine shaft fixing component, the adapter (2), and the torque output mechanism (3) are arranged along the same straight line. The turbine shaft fixing component is used to fix the turbine shaft (4). The torque output mechanism (3) is used to output torque and transmit the torque to the front bearing shaft (5) through the adapter (2) so that the front bearing shaft (5) rotates relative to the turbine shaft (4).

2. The disassembly device for the turbine shaft and the front bearing shaft according to claim 1, characterized in that: The turbine shaft fixing component includes an end fixing assembly, which includes a first stop nut (6) and a second stop nut (7) threadedly connected to the turbine shaft (4), and a fixing plate (8) disposed on the base (1). The fixing plate (8) is provided with a channel through which the turbine shaft (4) can pass. The first stop nut (6) and the second stop nut (7) are respectively arranged on both sides of the fixing plate (8), and the threads of the first stop nut (6) and the second stop nut (7) are opposite in direction so that they move simultaneously toward the fixing plate (8) when screwed.

3. The disassembly device for the turbine shaft and the front bearing shaft according to claim 2, characterized in that: The channel is a vertical channel (9) with a top opening provided on the fixed plate (8). The end fixing assembly also includes a limiting nut (10) installed on the turbine shaft (4) and located between the first stop nut (6) and the second stop nut (7). The limiting nut (10) is used to be locked in the vertical channel (9).

4. The disassembly device for the turbine shaft and the front bearing shaft according to claim 2 or 3, characterized in that: The turbine shaft fixing component also includes a central clamping assembly, which is disposed between the end fixing assembly and the torque output mechanism (3). The central clamping assembly includes a clamping upright plate (11) disposed on the base (1) and a splicing plate (12) for fixing on the clamping upright plate (11). The clamping upright plate (11) and the splicing plate (12) are respectively provided with an upright plate fastening groove (111) and a splicing plate fastening groove (121) at their corresponding edges. When the upright plate fastening groove (111) and the splicing plate fastening groove (121) are fastened together, the turbine shaft (4) can be fastened from the radial direction to achieve the fixing of the turbine shaft (4).

5. The disassembly device for the turbine shaft and the front bearing shaft according to claim 4, characterized in that: The central clamping components are arranged in groups and positioned on the base (1) at the position corresponding to the thickened node of the turbine shaft (4).

6. The disassembly device for the turbine shaft and the front bearing shaft according to claim 4, characterized in that: The clamping plate (11) and the splicing plate (12) are fixed to each other by bolts.

7. The disassembly device for the turbine shaft and the front bearing shaft according to any one of claims 1-3, characterized in that: The shaft-side connection structure (21) of the adapter (2) is keyed to the front bearing shaft (5); the adapter (2) is connected to the torque output mechanism (3) through the output-side connection structure (22), and the output-side connection structure (22) is keyed to the torque output mechanism (3).

8. The disassembly device for the turbine shaft and the front bearing shaft according to claim 7, characterized in that: Both the shaft-side connection structure (21) and the output-side connection structure (22) are spline structures, and both the adapter (2) and the torque output mechanism (3) are provided with corresponding spline groove structures; or both the shaft-side connection structure (21) and the output-side connection structure (22) are spline groove structures, and both the adapter (2) and the torque output mechanism (3) are provided with corresponding spline structures.

9. The disassembly device for the turbine shaft and the front bearing shaft according to any one of claims 1-3, characterized in that: The torque output mechanism (3) is a rotary hydraulic cylinder.

10. The disassembly apparatus for the turbine shaft and the front bearing shaft according to any one of claims 1-3, characterized in that: The base (1) is made of cast iron.

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