Guide vane lower end shaft dismounting tool
By adopting the dual-positioning assembly design in the lower end shaft disassembly of guide vane, the cumbersome problem of precise positioning of screws and shaft ports during the disassembly of the lower end shaft of guide vane during the turbine maintenance is solved, and efficient and precise disassembly operation is achieved.
Patent Information
- Application Number
- CN202420260449.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-02-02
AI Technical Summary
During the maintenance of the turbine, during the disassembly of the lower end shaft of the guide vane, the precise alignment of the screw and the shaft port is cumbersome, making it difficult to achieve high-precision docking.
Design a tool for disassembly of the lower end shaft of the guide vane, adopting a double-position assembly design, including the first positioning member and the second positioning member, the basic positioning is realized through the first positioning member, and the second positioning member is fine-tuned to ensure the screw and shaft ports. accurate docking.
Through the design of the dual positioning component, the operating procedures are simplified, the requirements for fine operation of technicians are reduced, the precision during the docking process of screws and shaft ports is significantly improved, and the disassembly efficiency and safety are improved.
Smart Images
Figure CN222521187U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water conservancy engineering equipment, in particular to a guide vane lower end shaft disassembly tool. Background Art
[0002] During the maintenance of the turbine, the lower end shaft of the guide vane is usually disassembled by pulling out. In actual operation, the technician will first put the fastener on the shaft sleeve. The fastener is provided with a screw interface so that the precisely adjusted screw assembly can be inserted to lock and control the specific position of the axis.
[0003] However, when executing this link, it is particularly critical and challenging to achieve accurate positioning and alignment of the screw and the shaft end. Due to the complex internal structure of the turbine, limited space, and extremely high positioning accuracy requirements, it is a relatively tedious process to repeatedly adjust the abutment ends of the abutment tooling to ensure that the screw can fit tightly with the shaft end. This problem not only tests the professional skills and patience of the operator, but also highlights the importance of accurate positioning in such disassembly work. Utility Model Content
[0004] The utility model aims to provide a guide vane lower end shaft disassembly tool to solve the problem of complicated positioning during the guide vane lower end shaft disassembly process proposed in the above background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A guide vane lower end shaft disassembly tool comprises a fastening member, a first positioning member and a second positioning member; the fastening member is provided with a screw hole, the fastening member has a plurality of screw holes respectively located at the first and second positioning members;
[0007] A first tightening end and a second tightening end on both sides of the screw mouth; the first positioning member is fixedly connected to the first tightening end, and the first positioning member has a first positioning surface; the second positioning member is movably connected to the second tightening end, and the second positioning member has a second positioning surface; when the first positioning member is positioned, the second positioning member moves toward the first positioning member, so that the second positioning surface can form a horizontal coplanar with the first positioning surface.
[0008] Furthermore, the second positioning member is rotatably connected to the second abutting end, a horizontal sliding groove is provided on the second abutting end, one end of the second positioning member is clamped in the sliding groove and slides along the sliding groove.
[0009] Furthermore, one end of the first positioning surface and the second positioning surface away from the screw port extends downward perpendicularly to the first positioning surface and the second positioning surface.
[0010] Furthermore, an engaging section is formed between the first positioning surface and the second positioning surface and their respective protruding surfaces, and the engaging section protrudes outwards.
[0011] Furthermore, arc-shaped transitions are adopted between the two ends of the engaging section and the first positioning surface, the second positioning surface and their protruding surfaces.
[0012] Furthermore, a fitting section is formed at the lower end of the engaging section, and the fitting section is parallel to the first positioning surface and the second positioning surface.
[0013] Furthermore, a fitting section is formed at the lower end of the bite section, and the fitting section is parallel to the first positioning surface and the second positioning surface. The locking member is arranged at the clamping end of the second positioning member, and is used to lock the second positioning member.
[0014] Furthermore, the locking member is arranged on the outer side of the slide slot, and an adjustment gap is formed between the locking member and the outer wall of the slide slot.
[0015] The advantages of the guide vane lower end shaft disassembly tool described in the utility model over the prior art are:
[0016] Through design, the first positioning member and the second positioning member cleverly form a dual positioning assembly, ensuring the efficiency of the operation process and the docking accuracy. Specifically, when implementing the positioning operation, the preset first positioning member is first relied on to achieve a stable and clear-reference basic positioning. This stage builds a precise framework for subsequent steps.
[0017] Subsequently, by flexibly adjusting the second positioning member to work in conjunction with the first positioning member, the abutment can be fine-tuned with high adaptability, allowing it to quickly adapt to the position requirements of different shaft ports in a changing working environment. This hierarchical, linkage positioning method not only simplifies the operating procedures and reduces the requirements for fine operation by technicians, but also significantly improves the precision of the screw and shaft port docking process. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall planar structure of the utility model;
[0019] Figure 2 It is a structural schematic diagram of the second abutting end of the utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the second positioning member of the utility model;
[0021] Figure 4 It is a side view of the first positioning surface of the utility model.
[0022] Markings and corresponding parts names in the attached drawings:
[0023] Tightening member, 20, screw mouth, 101, first tightening end, 102, second tightening end, 30, first positioning member, 301, first positioning surface, 40, second positioning member, 401, second positioning surface, 50, slide groove, 60, locking member. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0025] Example 1: Figure 1 As shown, a guide vane lower end shaft disassembly tooling proposed in this embodiment includes a fastening member 10, which is made of high-strength, corrosion-resistant stainless steel material, and the overall structure is designed to be U-shaped. A screw hole 20 with a diameter of 24 mm is precisely processed on the protruding end of the U-shaped abutment member, which is used to install a matching screw to achieve accurate docking with the turbine guide vane lower end shaft; the opening ends of the U-shaped abutment member respectively form a first fastening end 101 and a second fastening end 102, and the space between the two forms an operating space specifically used to accommodate and facilitate the extraction of the shaft body.
[0026] The first abutting end 101 can be integrated with the first positioning member 30 by means of rigid connection, and the first positioning member 30 has a precise plane for preliminary positioning; while the second abutting end 102 is flexibly equipped with a movable and adjustable second positioning member 40, and the second positioning member 40 also has a second positioning surface 401 for auxiliary positioning. When performing the disassembly operation, the first positioning member 30 is first used to complete the initial position setting, and then the position of the second positioning member 40 is adjusted to ensure that the first positioning surface 301 and the second positioning surface 401 can form a coplanar surface in the horizontal direction, so that the screw can finally be accurately docked to the shaft port, thereby safely and efficiently realizing the extraction operation of the lower end shaft of the guide vane.
[0027] The movable connection between the second positioning member 40 and the second clamping end 102 can be a rotational connection. For example, the second positioning member 40 can be connected to the second clamping end 102 via a precision bearing or a hinge structure, allowing it to rotate freely within a certain angle range, so as to accurately adjust the angle of the second positioning surface 401 so that it forms a horizontal coplanar with the first positioning surface 301.
[0028] Of course, the movable connection between the second positioning member 40 and the second clamping end 102 can also be a sliding connection. Specifically, one end of the second positioning member 40 can be embedded in the slide groove 50 on the second clamping end 102, and mechanical devices such as linear guides or ball screws can be used to achieve smooth sliding adjustment along the axial or radial direction to ensure that it can be flexibly moved to a suitable position according to actual needs.
[0029] Example 2: Figure 2-3 As shown, on the basis of the above embodiment, in order to simultaneously achieve precise positioning in the axial and radial directions, the above-mentioned second positioning member 40 and the second tightening end 102 can adopt a rotation and sliding composite connection method. Specifically, the second positioning member 40 is rotatably connected to the second tightening end 102 through a precision bearing or a similar structure, so that the operator can adjust the angle of the second positioning surface 401 according to actual needs to ensure that it can form a horizontal coplanarity with the first positioning surface 301, thereby meeting the axial positioning requirements.
[0030] At the same time, a horizontal slide groove 50 is carefully designed on the second abutting end 102, and the processing precision of the slide groove 50 is extremely high to ensure that the second positioning member 40 can slide smoothly and accurately along it. One end of the second positioning member 40 is precisely processed to form a part that can be embedded and freely slide along the slide groove 50, which not only allows fine adjustment in the radial direction, but also ensures that the second positioning member 40 can move linearly according to the actual position of the shaft body after the angle adjustment is completed, thereby realizing the precise positioning of the lower end shaft of the turbine guide vane in multiple dimensions.
[0031] Example 3: Figure 4 As shown, on the basis of the above embodiment, in order to improve the positioning efficiency, the first positioning surface 301 and the second positioning surface 401 are designed to extend vertically at one end away from the screw hole. This design allows the lower edge of the positioning surface to extend vertically downward, and together with the first positioning surface 301 and the second positioning surface 401, a quick positioning structure is formed. When the operator performs the positioning operation, he only needs to align this positioning structure and fit it tightly to the edge of the sleeve to achieve efficient and precise matching between the tooling and the sleeve.
[0032] Specifically, the protruding portion can be a curved surface that protrudes away from the side wall of the sleeve. During specific operations, when the operator aligns and fits this quick positioning structure to the edge of the sleeve, the curved surface structure can naturally fit the curvature of the side wall of the sleeve, thereby forming a clamping state similar to "semi-enclosed", ensuring that the tooling provides sufficient support and fixing in the radial direction. This unique curved surface design not only improves positioning efficiency, but also effectively prevents the risk of sleeve or shaft displacement caused by uneven force, greatly enhancing the safety and stability during disassembly.
[0033] Example 4: On the basis of the above embodiments, in order to further enhance the firm clamping of the sleeve by the first positioning surface 301 and the second positioning surface 401 and provide a more precise positioning function, the first positioning surface 301 and the second positioning surface 401 both form an outwardly protruding bite section between the portion vertically extending from one end away from the screw mouth and their respective main body portions.
[0034] When the tooling is matched with the sleeve, the engagement sections of the first positioning surface 301 and the second positioning surface 401 can be embedded in the groove or chamfered portion of the sleeve edge to achieve tight engagement, enhance the axial and radial fixing effect, and effectively prevent the shaft body from sliding or deflecting during disassembly. In addition, the convex shape of the engagement section can also increase the contact area, distribute the force, reduce local stress, and avoid damage to the sleeve or tooling due to concentrated force.
[0035] Specifically, the engaging section can be a semicircular or arc-shaped structure, and its curvature matches the chamfered or rounded corner of the sleeve edge. In this way, when the tooling is aligned and pressed onto the sleeve, the engaging section can fit into the groove of the sleeve to form a secure connection similar to a "snap-on" type.
[0036] Embodiment 5: Based on the above embodiment, in order to further reduce the wear on the sleeve surface and ensure a smooth transition when the tooling contacts the sleeve, the design of the bite section is optimized. Specifically, an arc transition design is adopted between the two end portions of the bite section and the first positioning surface 301, the second positioning surface 401 and their respective portions extending vertically downward.
[0037] First, the arc-shaped transition structure can naturally disperse the force, avoiding scratches and wear caused by direct contact between hard straight edges and the sleeve surface, and effectively protecting the original precision and surface quality of the sleeve; then, the rounded arc edge makes the tooling smoother during assembly or disassembly, reduces the vibration and noise caused by mechanical collision, and improves work efficiency and safety; finally, the arc-shaped transition design can also improve the adaptability of the tooling to sleeves of different specifications and shapes, and can achieve good fit and stability even when facing sleeve edges with chamfers or fillets.
[0038] Example 6: On the basis of the above embodiment, in order to further enhance the stability and positioning accuracy of the tooling and the sleeve, an engaging section is formed at the lower end of the above-mentioned bite section. The above-mentioned engaging section is parallel to the above-mentioned first positioning surface 301 and the above-mentioned second positioning surface 401. The engaging section can be a planar structure. When the tooling is aligned and pressed onto the sleeve, the engaging section can be accurately inserted into the specific groove or plane of the edge of the sleeve to form a firm embedded fixing effect, thereby effectively preventing any accidental sliding or deviation of the shaft body during the disassembly process.
[0039] Since the engaging section is parallel to the first positioning surface 301 and the second positioning surface 401 , a continuous and balanced supporting force distribution is formed in both the axial and radial directions, which helps to disperse the force, reduce local stress concentration, and avoid unnecessary damage to the sleeve or tooling.
[0040] This kind of interlocking section design greatly improves the compatibility of the tooling with shaft sleeves of different specifications and shapes. Regardless of whether the edge of the shaft sleeve is chamfered, rounded or other special shapes, as long as the corresponding matching space is reserved, the interlocking section can achieve good matching and contact, thereby ensuring the safe and efficient disassembly operation.
[0041] Embodiment 7: On the basis of the above embodiment, in order to ensure that the second positioning member 40 can be firmly locked after being adjusted to the correct position and prevent displacement caused by external force or vibration during the disassembly process, a locking member 60 is further provided in this embodiment. The locking member 60 is provided at the clamping end of the second positioning member 40 and is used to lock the second positioning member 40. When positioning the lower end shaft of the guide vane, the second positioning member 40 is first adjusted to form a horizontal coplanar with the first positioning surface 301. When the second positioning member 40 is adjusted to a suitable position, the operator can start or manually operate the locking member 60, and the second positioning member 40 is firmly fixed in the specified position by snap fastening, bolt fixing or other appropriate locking mechanisms.
[0042] Example 8: On the basis of the above-mentioned embodiment, in order to achieve precise adjustment and firm locking of the second positioning member 40, the above-mentioned locking member 60 is arranged at the outer position of the slide groove 50 on the second positioning member 40. This layout ensures that the operator can conveniently perform the locking operation without interfering with the internal work of the slide groove 50.
[0043] An adjustment gap is left between the locking member 60 and the outer wall of the slide groove 50. By adjusting the gap, the second positioning member 40 is allowed to move smoothly along the slide groove 50 within a certain range, so as to be accurately positioned according to the specific structure or disassembly requirements of the sleeve. When the second positioning member 40 is adjusted to the ideal position, the locking member 60 can be operated to move it inward and eliminate the adjustment gap, thereby firmly fixing the second positioning member 40 at the selected position to prevent accidental sliding or displacement during the disassembly process.
[0044] Specifically, the locking member can be a fastening element such as an adjusting nut, which is installed on the outer wall of the slide slot 50 to form a specific adjustment gap with the slide slot 50. When the position of the second positioning member 40 needs to be adjusted, the operator can change the relative position between the second positioning member 40 and the movable part in the slide slot 50 by rotating the adjusting nut, thereby controlling the second positioning member 40 to move smoothly and accurately along the slide slot 50.
[0045] After the second positioning member 40 is moved to the ideal position, the adjusting nut is tightened continuously to gradually approach or contact the inner wall of the slide slot 50 until the preset adjustment gap is eliminated, thereby realizing reliable fixation and locking of the second positioning member 40. In this way, not only is it ensured that the disassembly tool can be flexibly adjusted and accurately positioned according to actual needs, but also the stability in the working state is ensured, and the loosening or displacement of the second positioning member 40 due to factors such as accidental vibration is avoided, thereby improving the safety and efficiency of the disassembly operation of the lower end shaft of the guide vane.
[0046] Working principle: When disassembling the lower end shaft of the guide vane, install the tooling on the sleeve so that the first positioning surface 301 contacts the corresponding position of the lower end shaft of the turbine guide vane and maintains accurate fit. Then, using the first positioning member 30 that has been accurately positioned as a reference base point, start adjusting the second positioning member 40. The operator can move the second positioning member 40 in the horizontal direction through the slide groove 50 structure, while ensuring that the second positioning surface 401 thereon can gradually approach the first positioning surface 301. In this process, it may be necessary to fine-tune the position of the second positioning member 40 several times until the second positioning surface 401 forms a horizontal coplanar with the first positioning surface 301.
[0047] Next, the position of the second positioning member 40 is further locked by using a locking member 60, such as an adjustment nut, disposed outside the slide groove 50 to eliminate the adjustment gap, thereby ensuring that the second positioning member 40 will not move or loosen in any unnecessary way during the disassembly process. Finally, after all positioning work is completed, the guide vane lower end shaft can be disassembled safely and efficiently.
[0048] When multiple illustrative embodiments are mentioned in this specification, it means that the specific structure described in conjunction with the embodiment is included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when a structure is described in conjunction with any embodiment, it is claimed that the structure is implemented in conjunction with other embodiments within the scope of the utility model.
Claims
1. A guide vane lower end shaft disassembly tool, characterized in that: include: A tightening member, wherein a screw hole is formed on the tightening member, and the tightening member has a first tightening end and a second tightening end respectively located on two sides of the screw hole; A first positioning member, the first positioning member is fixedly connected to the first abutting end, and the first positioning member has a first positioning surface; A second positioning member, the second positioning member is movably connected to the second abutting end, and the second positioning member has a second positioning surface; When the first positioning member is positioned, the second positioning member moves toward the first positioning member, so that the second positioning surface can form a horizontal coplanar with the first positioning surface.
2. A guide vane lower end shaft disassembly tool according to claim 1, characterized in that: The second positioning member is rotatably connected to the second abutting end. The second abutting end is provided with a horizontal sliding groove. One end of the second positioning member is clamped in the sliding groove and slides along the sliding groove.
3. A guide vane lower end shaft disassembly tool according to claim 2, characterized in that: One end of the first positioning surface and the second positioning surface away from the screw port extends downward perpendicularly to the first positioning surface and the second positioning surface.
4. A guide vane lower end shaft disassembly tool according to claim 3, characterized in that: An engaging section is formed between the first positioning surface and the second positioning surface and their respective protruding surfaces, and the engaging section protrudes outwards.
5. A guide vane lower end shaft disassembly tool according to claim 4, characterized in that: Arc-shaped transitions are adopted between the two ends of the engaging section and the first positioning surface, the second positioning surface and their protruding surfaces.
6. A guide vane lower end shaft disassembly tool according to claim 5, characterized in that: An engaging section is formed at the lower end of the engaging section, and the engaging section is parallel to the first positioning surface and the second positioning surface.
7. A guide vane lower end shaft disassembly tool according to claim 6, characterized in that: It also includes a locking piece, which is arranged at the clamping end of the second positioning piece and is used to lock the second positioning piece.
8. A guide vane lower end shaft disassembly tool according to claim 7, characterized in that: The locking piece is arranged on the outer side of the slide slot, and an adjustment gap is formed between the locking piece and the outer wall of the slide slot.