Catheter of propeller and manufacturing method

Abstract

The invention provides a guide pipe of a propeller and a manufacturing method, and belongs to the field of ship propellers. The manufacturing method comprises the following steps: providing an outer ring frame, providing a hub body, providing a plurality of guide vanes, placing the plurality of guide vanes between the outer ring frame and the hub body, and enabling a third positioning structure of each guide vane to be mutually clamped with a corresponding first positioning structure of the guide vane, the fourth positioning structure is clamped with the second positioning structure corresponding to the guide vane, the third assembly hole is coaxial with the first assembly hole corresponding to the guide vane, and the fourth assembly hole is coaxial with the second assembly hole corresponding to the guide vane; and connecting pieces are inserted into the first assembly hole and the third assembly hole which are coaxially arranged, and the second assembly hole and the fourth assembly hole which are coaxially arranged, so that the guide pipe is obtained. The machining precision of the guide pipe can be improved.

Description

Technical Field

[0001] The present invention belongs to the field of ship propellers, and in particular relates to a duct of a propeller and a manufacturing method thereof. Background Art

[0002] The duct is an important structure of the propeller. The duct generally includes an outer ring frame, a plurality of guide vanes and a hub body. The outer ring frame is located outside the hub body, and the plurality of guide vanes are located between the outer ring frame and the hub body, and are connected to the outer ring frame and the hub body respectively.

[0003] In the related art, the catheter is usually manufactured by casting and grinding. After the catheter blank is obtained by demolding, the catheter blank is ground to make the dimensions of the catheter meet the design requirements.

[0004] However, for larger sized ducts, casting is more difficult and the casting process is difficult to control. The connection parts between the guide vanes and the outer ring frame and the hub body are prone to casting defects such as porosity and looseness, which affect the quality of the duct and result in poor precision of the processed duct. Summary of the invention

[0005] The disclosed embodiment provides a catheter of a thruster and a manufacturing method, which can improve the processing accuracy of the catheter and help further improve the propulsion efficiency of the thruster. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides a method for manufacturing a catheter, the manufacturing method comprising: providing an outer ring frame, the outer ring frame having a plurality of first positioning structures and a plurality of first assembly holes, the plurality of first positioning structures being evenly spaced along the circumference of the outer ring frame, and the plurality of first assembly holes corresponding one-to-one to the plurality of first positioning structures, each of the plurality of first assembly holes extending along the axial direction of the outer ring frame, and the first assembly hole being located in the corresponding first positioning structure; providing a hub body, the hub body having a plurality of second positioning structures and a plurality of second assembly holes, the plurality of second positioning structures being evenly spaced along the circumference of the hub body, and the plurality of second assembly holes corresponding one-to-one to the plurality of second positioning structures, and each of the plurality of second assembly holes extending along the axial direction of the outer ring frame, and the second assembly holes being arranged close to the corresponding second positioning structure; providing a plurality of guide vanes, each of the plurality of guide vanes having a third positioning structure , a fourth positioning structure, a third assembly hole and a fourth assembly hole, the third positioning structure and the third assembly hole are both located at the first end of the guide vane along the radial direction of the outer ring frame, the third assembly hole is arranged close to the corresponding third positioning structure, the fourth positioning structure and the fourth assembly hole are both located at the second end of the guide vane along the radial direction of the outer ring frame, and the fourth assembly hole is arranged close to the corresponding fourth positioning structure; the multiple guide vanes are placed between the outer ring frame and the hub body, so that the third positioning structure of each guide vane is mutually engaged with a corresponding one of the first positioning structures, the fourth positioning structure is mutually engaged with a corresponding one of the second positioning structures, the third assembly hole is coaxial with the corresponding first assembly hole, and the fourth assembly hole is coaxial with the corresponding second assembly hole; connectors are inserted into the coaxially arranged first assembly hole and the third assembly hole, and the coaxially arranged second assembly hole and the fourth assembly hole to obtain the conduit.

[0007] In another implementation of the present disclosure, providing the outer ring frame includes: separately processing the inner ring plate, the middle flange, the suspension connecting flange and a plurality of ear-shaped outer plates; welding the inner ring plate, the middle flange, the suspension connecting flange and the plurality of ear-shaped outer plates together, so that the middle flange and the suspension connecting flange are respectively located at the two ends of the inner ring plate, and the first end of each of the plurality of ear-shaped outer plates is connected to the suspension connecting flange, and the second end of the ear-shaped outer plate is connected to the middle flange, to obtain the welded part; machining the welded part so that each of the ear-shaped outer plates has a first positioning structure and a first assembly hole.

[0008] In another implementation of the present disclosure, the extension direction of the first positioning structure is from the first end to the second end of the ear-shaped outer plate, and the first assembly hole is located at the first positioning structure near the second end of the ear-shaped outer plate.

[0009] In another implementation of the present disclosure, the welding together of the inner ring plate, the middle flange, the suspension connecting flange and the multiple ear-shaped outer plates includes: coaxially sleeve the middle flange outside the first end of the inner ring plate, and weld the inner ring wall of the middle flange to the inner ring plate; arrange the suspension connecting flange at the second end of the inner ring plate, and weld the outer ring wall of the suspension connecting flange to the inner ring plate; arrange the multiple ear-shaped outer plates evenly spaced along the circumference of the suspension connecting flange, and weld the first end of each ear-shaped outer plate of the multiple ear-shaped outer plates to the suspension connecting flange, weld the second end of the ear-shaped outer plate to the annular surface of the middle flange, and weld the middle part of the ear-shaped outer plate to the inner ring plate.

[0010] In another implementation of the present disclosure, providing a plurality of guide vanes includes: manufacturing any one of the plurality of guide vanes in the following manner: obtaining a guide vane blank by additive manufacturing technology; performing stress relief annealing on the guide vane blank; performing rough machining and fine machining on the outer surface of the guide vane blank after stress relief annealing to obtain a guide vane molded part; and machining the guide vane molded part to obtain the guide vane.

[0011] In another implementation of the present disclosure, a duct is further provided, which includes a hub body, an outer ring frame and a plurality of guide vanes, the hub body and the outer ring frame are coaxially arranged, and the outer ring frame is located outside the hub body, the outer ring frame has a plurality of first positioning structures and a plurality of first assembly holes, the plurality of first positioning structures are evenly spaced along the circumference of the outer ring frame, and the plurality of first assembly holes correspond one-to-one to the plurality of first positioning structures, each of the plurality of first assembly holes extends along the axial direction of the outer ring frame, and the first assembly hole is located in the corresponding first positioning structure; the hub body has a plurality of second positioning structures and a plurality of second assembly holes, the plurality of second positioning structures are evenly spaced along the circumference of the hub body, and the plurality of second assembly holes correspond one-to-one to the plurality of second positioning structures, each of the plurality of second assembly holes extends along the axial direction of the outer ring frame, and the second The assembly hole is arranged close to the corresponding second positioning structure; the multiple guide vanes are evenly arranged circumferentially between the hub body and the outer ring frame, each of the multiple guide vanes has a third positioning structure, a fourth positioning structure, a third assembly hole and a fourth assembly hole, the third positioning structure and the third assembly hole are both located at the first end of the guide vane along the radial direction of the outer ring frame, the third assembly hole is arranged close to the corresponding third positioning structure, the fourth positioning structure and the fourth assembly hole are both located at the second end of the guide vane along the radial direction of the outer ring frame, the fourth assembly hole is arranged close to the corresponding fourth positioning structure, the third positioning structure of each guide vane is mutually engaged with a corresponding one of the first positioning structures, the fourth positioning structure is mutually engaged with a corresponding one of the second positioning structures, the third assembly hole is coaxially connected to the corresponding first assembly hole, and the fourth assembly hole is coaxially connected to the corresponding second assembly hole.

[0012] In another implementation of the present disclosure, the first positioning structure and the fourth positioning structure are both slots, the second positioning structure and the third positioning structure are both protrusions, the third positioning structure is located in the first positioning structure, and the second positioning structure is located in the fourth positioning structure.

[0013] In another implementation of the present disclosure, the guide vane includes a first connection part, a second connection part and a blade body, and the first connection part and the second connection part are respectively connected to the two ends of the blade body along the radial direction of the outer ring frame; the first connection part is a bending structure, the first part of the first connection part is located inside the outer ring frame, and the second part of the first connection part is located outside the end of the outer ring frame, the third positioning structure is located in the first connection part, and the third assembly hole is located in the second part of the first connection part; the fourth positioning structure and the fourth assembly hole are located in the second connection part.

[0014] In another implementation of the present disclosure, the third positioning structure has a first inclined surface, and along the direction from the first part to the second part of the first connecting part, the first inclined surface extends radially outward along the outer ring frame; the first positioning structure has a second inclined surface that is in contact with the first inclined surface.

[0015] In another implementation of the present disclosure, the hub body includes an axial diameter section, an annular sleeve and a plurality of fixed seats, the annular sleeve is sleeved on the outside of the middle part of the axial diameter section, the plurality of fixed seats are circumferentially evenly spaced and connected to the outer circumference of the axial diameter section, and are connected to the same end face of the annular sleeve; the plurality of second positioning structures correspond one-to-one to the plurality of fixed seats, and the second positioning structure is a long rib plate, the length direction of the second positioning structure is the axial direction of the axial diameter section, one end of the second positioning structure is connected to the corresponding fixed seat, and the other end is connected to the axial diameter section, and the second assembly hole is located in the corresponding center of the corresponding second positioning structure; the second connecting portion has a positioning boss on the side facing the hub body, the fourth assembly hole passes through the positioning boss, and the positioning boss is docked with a corresponding one of the fixed seats.

[0016] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0017] When processing a catheter by the manufacturing method provided by the embodiment of the present disclosure, since the method first provides an outer ring frame, a hub body and a guide vane, and then places the guide vane between the outer ring frame and the hub body, and cooperates with the first positioning structure and the third positioning structure, and the second positioning structure and the fourth positioning structure, so that each guide vane is positioned and assembled between the outer ring frame and the hub body, and then the connector is plugged into the first assembly hole and the third assembly hole and the second assembly hole and the fourth assembly hole, the catheter can be obtained. In this way, by processing the catheter in an assembly manner, many disadvantages of the overall casting of the catheter are avoided, the processing technology of the catheter is simplified, and the serial process of the overall manufacturing of the catheter is changed into a parallel process, which greatly improves the production efficiency.

[0018] In addition, processing the catheter by assembly method also greatly improves the maintainability of the product. When a component is damaged, only the damaged component needs to be replaced without scrapping the entire catheter. This can greatly shorten the maintenance cycle of the thruster and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a schematic structural diagram of a catheter of a thruster provided by an embodiment of the present disclosure;

[0021] Figure 2 yes Figure 1 Side view of

[0022] Figure 3 is a schematic diagram of the structure of the outer ring frame provided by an embodiment of the present disclosure;

[0023] Figure 4 is a schematic structural diagram of a hub body provided by an embodiment of the present disclosure;

[0024] Figure 5 is a schematic diagram of the structure of the guide vane provided in an embodiment of the present disclosure;

[0025] Figure 6 yes Figure 5 A schematic diagram of the structure from another perspective;

[0026] Figure 7 yes Figure 6 A cross-sectional view of the middle structure;

[0027] Figure 8 yes Figure 3 A cross-sectional view of the middle structure;

[0028] Fig. 9 is a flow chart of a method for manufacturing a catheter of a thruster provided by an embodiment of the present disclosure;

[0029] Fig.10 is a flow chart of a method for manufacturing another thruster catheter provided by an embodiment of the present disclosure;

[0030] Fig.11 It is a schematic diagram of the assembly of the guide vane, the outer ring frame and the hub body;

[0031] Fig.12 is a front view of a catheter provided in an embodiment of the present disclosure.

[0032] The symbols in the figure mean the following:

[0033] 101, hub body; 1010, second positioning structure; 1011, second assembly hole; 11, shaft diameter section; 12, ring sleeve; 13, fixing seat;

[0034] 102, outer ring frame; 1021, inner ring plate; 1022, middle flange; 1023, suspension connection flange; 1025, ear-shaped outer plate; 1020, first positioning structure; 10200, first assembly hole; 10201, second inclined surface;

[0035] 103. Guide vane; 131. First connection part; 132. Second connection part; 133. Blade body; 134. Positioning boss; 1030. Third positioning structure; 1031. Fourth positioning structure; 10301. Third assembly hole; 10302. Fourth assembly hole; 10300. First inclined surface. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0037] In the related art, the duct in the electric propulsion device uses the curved inner wall and guide vanes of the duct to guide the water flow into the duct at the required flow rate and direction during the propulsion process, thereby improving the propulsion efficiency and reducing noise. In other words, after the duct is set outside the propeller impeller, the propulsion efficiency of the propeller can be improved. When working, the push and pull force generated by the rotation of the outer ring frame in the duct is transmitted to the hub body in the duct through the front and rear thrust bearings, and finally transmitted to the hull, so that the ship moves forward.

[0038] In the disclosed embodiment, the duct may be a front duct of the electric propulsion system.

[0039] Figure 1 Schematic diagram of the structure of a catheter of a thruster provided by an embodiment of the present disclosure. Figure 1 As shown, the duct includes a hub body 101, an outer ring frame 102 and a plurality of guide vanes 103. The hub body 101 and the outer ring frame 102 are coaxially arranged, and the outer ring frame 102 is located outside the hub body 101. The outer ring frame 102 has a plurality of first positioning structures 1020 and a plurality of first assembly holes 10200. The plurality of first positioning structures 1020 are evenly spaced along the circumference of the outer ring frame 102, and the plurality of first assembly holes 10200 correspond one-to-one to the plurality of first positioning structures 1020. Each of the plurality of first assembly holes 10200 extends along the axial direction of the outer ring frame 102, and the first assembly hole 10200 is located in the corresponding first positioning structure 1020.

[0040] The hub body 101 has a plurality of second positioning structures 1010 and a plurality of second assembly holes 1011. The plurality of second positioning structures 1010 are evenly arranged at circumferential intervals along the hub body 101, and the plurality of second assembly holes 1011 correspond one-to-one to the plurality of second positioning structures 1010. Each of the plurality of second assembly holes 1011 extends along the axial direction of the outer ring frame 102, and the second assembly holes 1011 are arranged close to the corresponding second positioning structures 1010.

[0041] The plurality of guide vanes 103 are uniformly arranged between the hub body 101 and the outer ring frame 102 in the circumferential direction. Each of the plurality of guide vanes 103 has a third positioning structure 1030, a fourth positioning structure 1031, a third assembly hole 10301 and a fourth assembly hole 10302. The third positioning structure 1030 and the third assembly hole 10301 are both located at a first end of the guide vane 103 along the radial direction of the outer ring frame 102. The third assembly hole 10301 is arranged close to the corresponding third positioning structure 1030. The fourth positioning structure 1031 and the fourth assembly hole 10302 are arranged close to the corresponding third positioning structure 1030. 302 are all located at the second end of the guide vane 103 along the radial direction of the outer ring frame 102, the fourth assembly hole 10302 is arranged close to the corresponding fourth positioning structure 1031, the third positioning structure 1030 of each guide vane 103 is mutually clamped with a corresponding first positioning structure 1020, the fourth positioning structure 1031 is mutually clamped with a corresponding second positioning structure 1010, the third assembly hole 10301 is coaxially connected with the corresponding first assembly hole 10200, and the fourth assembly hole 10302 is coaxially connected with the corresponding second assembly hole 1011.

[0042] Since the above duct is coordinated with the first positioning structure and the third positioning structure, and the second positioning structure and the fourth positioning structure, each guide vane is respectively assembled between the outer ring frame and the hub body. In this way, the duct is obtained by assembling, which avoids many disadvantages of the overall casting of the duct, simplifies the processing technology of the duct, and changes the serial process of the overall manufacturing of the duct into a parallel process, greatly improving the production efficiency. In addition, the above duct also greatly improves the maintainability of the product. When a certain component is damaged, only the damaged component needs to be replaced without scrapping the entire duct, which can greatly reduce the maintenance cycle of the propeller and reduce the maintenance cost.

[0043] Figure 2 yes Figure 1 Side view of Figure 2 , wherein the outer ring frame 102 includes an annular inner ring plate 1021, an intermediate flange 1022, a suspension connection flange 1023, and an ear-shaped outer plate 1024. In the axial direction of the inner ring plate 1021, the inner diameter of the inner hole of the inner ring plate 1021 gradually decreases from the first end of the inner ring plate 1021 to the second end of the inner ring plate 1021. That is, the inner hole of the inner ring plate 1021 is trumpet-shaped.

[0044] The middle flange 1022 is an annular plate and is coaxially connected to the outside of the first end of the inner ring plate 1021. The suspension connection flange 1023 is an annular plate and is parallel to the middle flange 1022. The suspension connection flange 1023 is located inside the second end of the inner ring plate 1021 and is connected to the inner ring plate 1021.

[0045] A plurality of ear-shaped outer plates 1025 are arranged at intervals along the circumference of the suspension connection flange 1023, and the first end of each ear-shaped outer plate 1025 is located in the space defined by the suspension connection flange 1023 and the inner ring plate 1021. The first end of each ear-shaped outer plate 1025 is connected to the suspension connection flange 1023, the second end of the ear-shaped outer plate 1025 is connected to the end surface of the middle flange 1022, and the middle part of the ear-shaped outer plate 1025 is connected to the inner wall of the inner ring plate 1021. The second end of the ear-shaped outer plate 1025 is bent outward from the inside of the inner ring plate 1021 relative to the first end thereof.

[0046] Figure 3 is a schematic diagram of the structure of the outer ring frame provided in an embodiment of the present disclosure, Figure 4 is a schematic structural diagram of a hub body provided in an embodiment of the present disclosure, Figure 5 is a schematic diagram of the structure of the guide vane provided in the embodiment of the present disclosure, combined with Figure 3 , Figure 4 and Figure 5 Optionally, the first positioning structure 1020 and the fourth positioning structure 1031 are card slots, the second positioning structure 1010 and the third positioning structure 1030 are protrusions, the third positioning structure 1030 is located in the first positioning structure 1020, and the second positioning structure 1010 is located in the fourth positioning structure 1031.

[0047] The third positioning structure 1030 is used to be positioned and matched with the first positioning structure 1020, and the third assembly hole 10301 is used to match with the first assembly hole 10200, so that the connector can be inserted into the third assembly hole 10301 and the first assembly hole 10200 at the same time. The fourth positioning structure 1031 is used to match with the second positioning structure 1010. The fourth assembly hole 10302 is used to match with the second assembly hole 1011, so that the connector can be inserted into the second assembly hole 1011 and the fourth assembly hole 10302 at the same time.

[0048] In other examples, the first positioning structure 1020 and the fourth positioning structure 1031 may also be protrusions, and the second positioning structure 1010 and the third positioning structure 1030 may be slots. As long as the guide vane 103 can be clamped in the hub body 101 and the outer ring frame 102 through the above structure, it will be fine.

[0049] Combination Figure 5Optionally, the guide vane 103 includes a first connection portion 131, a second connection portion 132 and a blade body 133, wherein the first connection portion 131 and the second connection portion 132 are respectively connected to both ends of the blade body 133 along the radial direction of the outer ring frame 102. The first connection portion 131 is a bent structure, wherein the first portion of the first connection portion 131 is located inside the outer ring frame 102, and the second portion of the first connection portion 131 is located outside the end of the outer ring frame 102. Along the circumference of the outer ring frame 102, the third positioning structure 1030 is located in the middle of the first connection portion 131. The third assembly hole 10301 is located in the second portion of the first connection portion 131. The fourth positioning structure 1031 and the fourth assembly hole 10302 are located in the second connection portion 132.

[0050] The guide vane 103 is set to the above structure, and the first connection part 131 of the bending structure can be adapted to the ear-shaped outer plate 1025 in the outer ring frame 102, so that the first connection part 131 extends along the extension direction of the ear-shaped outer plate 1025, thereby increasing the contact area between the guide vane 103 and the outer ring frame 102, and finally improving the bonding strength between the two.

[0051] Figure 6 yes Figure 5 Another structural diagram from another perspective. Figure 7 yes Figure 6 The cross-sectional view of the middle structure, combined with Figure 6 and Figure 7 Optionally, the third positioning structure 1030 has a first inclined surface 10300 , and along the direction from the first part to the second part of the first connecting portion 131 , the first inclined surface 10300 extends outward along the radial direction of the outer ring frame 102 .

[0052] Figure 8 yes Figure 3 The cross-sectional view of the middle structure, combined with Figure 8 The first positioning structure 1020 has a second inclined surface 10201 that is in contact with the first inclined surface 10300 .

[0053] When the third positioning structure 1030 on the guide vane 103 is installed into the first positioning structure 1020 in the outer ring frame 102, the second inclined surface 10201 and the first inclined surface 10300 will fit together. After the connecting piece is locked in the first assembly hole 10200 and the third assembly hole 10301, the second inclined surface 10201 and the first inclined surface 10300 will fit closely together, and the guide vane 103 will sink along the axis of the outer ring frame 102, thereby generating a horizontal component force on the inclined surface, squeezing the guide vane 103 toward the center, so that the fourth positioning structure 1031 at the other end of the guide vane 103 will fit more and more tightly with the second positioning structure 1010 on the hub body 101. Since all the guide vanes 103 are evenly distributed and installed along the circumference of the outer ring frame 102, when all the guide vanes 103 are installed, a force pointing to the center of the hub body 101 will be generated, and this force will tightly position the hub body 101 in the center of the conduit so that it cannot be offset. At the same time, since the guide vanes 103 are symmetrically arranged along the guide tube, the guide vanes 103 will also generate outward tension, so that the outer ring frame 102 presses the guide vanes 103 tightly, and the guide vanes 103 are also subjected to pre-tension, thereby improving the supporting stiffness of the entire component.

[0054] Combination Figure 4 In order to further improve the connection strength between the guide vane 103 and the hub body 101, the hub body 101 optionally includes a shaft diameter section 11, a ring sleeve 12 and a plurality of fixing seats 13, the ring sleeve 12 is sleeved outside the middle of the shaft diameter section 11, and the plurality of fixing seats 13 are evenly spaced in the circumferential direction and connected to the outer periphery of the shaft diameter section 11 and connected to the same end surface of the ring sleeve 12. The plurality of second positioning structures 1010 correspond to the plurality of fixing seats 13 one by one.

[0055] The second positioning structure 1010 is a long rib, the length direction of which is the axial direction of the shaft diameter section 11, one end of which is connected to the corresponding fixing seat 13, and the other end of which is connected to the shaft diameter section 11. The second assembly hole 1011 is located in the corresponding second positioning structure 1010.

[0056] Combination Figure 5 The second connection portion 132 has a positioning boss 134 on one side facing the hub body 101 , and the fourth assembly hole 10302 passes through the positioning boss 134 , and the positioning boss 134 is docked with a corresponding fixing seat 13 .

[0057] In the disclosed embodiment, the first assembly hole 10200 , the second assembly hole 1011 , the third assembly hole 10301 , and the fourth assembly hole 10302 all extend along the axial direction of the outer ring frame 102 , which can facilitate the installation of fasteners.

[0058] Fig. 9 is a flow chart of a method for manufacturing a catheter of a thruster provided by an embodiment of the present disclosure, combined with Fig. 9 The present disclosure provides a method for manufacturing a catheter, which can be used to manufacture Figure 1 The catheter shown. The manufacturing method comprises:

[0059] S901: Provide an outer ring frame.

[0060] The structure of the outer ring frame is the same as that described above and will not be repeated here.

[0061] S902: Provide a hub body.

[0062] The structure of the hub body is the same as that described above and will not be repeated here.

[0063] S903: Provide a plurality of guide vanes.

[0064] The structure of the guide vane is the same as that described above and will not be repeated here.

[0065] S904: Place multiple guide vanes between the outer ring frame and the hub body, so that the third positioning structure of each guide vane is mutually engaged with a corresponding first positioning structure, the fourth positioning structure is mutually engaged with a corresponding second positioning structure, the third assembly hole is coaxial with the corresponding first assembly hole, and the fourth assembly hole is coaxial with the corresponding second assembly hole.

[0066] S905: Connecting parts are inserted into the coaxially arranged first assembly hole and the third assembly hole, and the coaxially arranged second assembly hole and the fourth assembly hole to obtain a catheter.

[0067] When processing a catheter by the manufacturing method provided by the embodiment of the present disclosure, since the method first provides an outer ring frame, a hub body and a guide vane, and then places the guide vane between the outer ring frame and the hub body, and cooperates with the first positioning structure and the third positioning structure, and the second positioning structure and the fourth positioning structure, so that each guide vane is positioned and assembled between the outer ring frame and the hub body, and then the connector is plugged into the first assembly hole and the third assembly hole and the second assembly hole and the fourth assembly hole, the catheter can be obtained. In this way, by processing the catheter in an assembly manner, many disadvantages of the overall casting of the catheter are avoided, the processing technology of the catheter is simplified, and the serial process of the overall manufacturing of the catheter is changed into a parallel process, which greatly improves the production efficiency.

[0068] In addition, processing the catheter by assembly method also greatly improves the maintainability of the product. When a component is damaged, only the damaged component needs to be replaced without scrapping the entire catheter. This can greatly shorten the maintenance cycle of the thruster and reduce maintenance costs.

[0069] Fig.10 FIG. 1 is a flow chart of a method for manufacturing another thruster catheter provided by an embodiment of the present disclosure, such as Fig.10The present disclosure also provides another method for making a catheter, which can be used to make Figure 1 The catheter shown. The manufacturing method comprises:

[0070] S1001: Process the inner ring plate, the middle flange, the suspension connection flange and multiple ear-shaped outer plates respectively.

[0071] In this embodiment, the inner ring plate 1021 is processed by two fan-shaped plates. During processing, the fan-shaped plates are first processed to obtain two semi-cones. Then, the two semi-cones are welded together to obtain the inner ring plate 1021, and the conical holes formed inside the two semi-cones are the inner holes of the inner ring plate 1021.

[0072] S1002: Weld the inner ring plate, the middle flange, the suspension connecting flange and a plurality of ear-shaped outer plates together so that the middle flange and the suspension connecting flange are respectively located at the two ends of the inner ring plate, and the first end of each ear-shaped outer plate is connected to the suspension connecting flange, and the second end of the ear-shaped outer plate is connected to the middle flange to obtain a welded part.

[0073] Fig.11 This is a schematic diagram of the assembly of the guide vane, outer ring frame and hub body. Fig.11 Optionally, step S1002 may include:

[0074] 10021 : The middle flange 1022 is coaxially arranged at the first end of the inner ring plate 1021 , so that the middle flange 1022 and the first end of the inner ring plate 1021 are welded together.

[0075] 10022 : Arrange the suspension connection flange 1023 at the second end of the inner ring plate 1021 , and weld the outer ring wall of the suspension connection flange 1023 and the second end of the inner ring plate 1021 together.

[0076] 10023: Multiple ear-shaped outer plates 1025 are arranged at intervals along the circumference of the suspension connecting flange 1023, and the first end of each ear-shaped outer plate 1025 in the multiple ear-shaped outer plates 1025 is welded to the suspension connecting flange 1023, the second end of the ear-shaped outer plate 1025 is welded to the annular surface of the middle flange 1022, and the middle part of the ear-shaped outer plate 1025 is welded to the inner wall of the inner ring plate 1021.

[0077] Combination Fig.11, assemble the inner ring plate 1021 and the middle flange 1022 on the working platform, adjust the position height of the middle flange 1022 on the inner ring plate 1021, so that the middle flange 1022 is spot-welded and fixed at the first end of the inner ring plate 1021. During spot welding, gas shielded welding is used for welding. For example, the gas may be carbon dioxide or an inert gas. The welding material is stainless steel, and the diameter of the welding material is not greater than 1.5 mm. In this embodiment, the welding material is GFS-316L stainless steel, and the diameter is Φ1.2 mm.

[0078] Next, the suspension connection flange 1023 is coaxially positioned at the second end of the inner ring plate 1021, and the end surface of the second end of the inner ring plate 1021 is in contact with the suspension connection flange 1023, and then the suspension connection flange 1023 and the inner ring plate 1021 are spot welded together. During spot welding, gas shielded welding is used for welding. The spot welding method is the same as the spot welding method of the intermediate flange 1022 and the inner ring plate 1021.

[0079] Then, a plurality of ear-shaped outer plates 1025 are welded to the inner ring plate 1021 and the middle flange 1022, so that the plurality of ear-shaped outer plates 1025 are evenly distributed along the circumference of the inner ring plate 1021, and the first end of each ear-shaped outer plate 1025 is connected to the suspension connection flange 1023, and the second end of the ear-shaped outer plate 1025 is connected to the annular surface of the middle flange 1022. The middle part of the ear-shaped outer plate 1025 is connected to the inner ring plate 1021.

[0080] S1003: Machining the welded parts so that each ear-shaped outer panel has a first positioning structure and a first assembly hole.

[0081] Optionally, step S1003 may be implemented in the following manner:

[0082] A first positioning structure 1020 and a first assembly hole 10200 are respectively processed in each ear-shaped outer plate 1025, and the first positioning structure 1020 is a concave slot. Along the circumference of the outer ring frame 102, the first positioning structure 1020 is located in the middle of the ear-shaped outer plate 1025. The extension direction of the first positioning structure 1020 is the direction from the first end to the second end of the ear-shaped outer plate 1025. Along the extension direction of the first positioning structure 1020, the first assembly hole 10200 is located at the second end of the first positioning structure 1020 close to the ear-shaped outer plate 1025.

[0083] The above outer ring frame is formed by welding the structural steel plate. After forming, the outer ring frame is machined to form the first positioning structure, the first assembly hole, etc., and a 1mm margin is left on one side of the external stop of the outer ring frame for subsequent final finishing.

[0084] S1004: Forge the hub body blank.

[0085] The hub body blank is directly processed by forging, which can not only improve the structural strength of the hub body, but also reduce the processing steps of the hub body.

[0086] S1005: machining the hub body blank to obtain a hub body having a plurality of second positioning structures and a plurality of second assembly holes.

[0087] The hub body is a forging blank, and the structure of the matching parts with the guide vanes needs to be completely processed and formed. The shaft section of the hub body needs to leave a 1mm margin on one side and then be fine-machined after the final assembly.

[0088] The second positioning structure 1010 is a long strip of ribs, and the length direction of the second positioning structure 1010 is the axial direction of the hub body 101. The second assembly hole 1011 is located at one end of the shaft section of the second positioning structure 1010 facing the hub body 101.

[0089] S1006: Processing a plurality of guide vanes.

[0090] In this embodiment, the guide vane can be processed by additive manufacturing.

[0091] Optionally, step S1006 may manufacture any guide vane among the plurality of guide vanes in the following manner:

[0092] 10061: The guide vane blank is obtained through additive manufacturing technology.

[0093] The so-called additive manufacturing technology is a technology that uses digital model files as the basis and uses powdered metal or non-metal and other bondable materials to print layer by layer to construct objects.

[0094] Additive manufacturing technology often uses a 3D printer to "print" the cross section of the part on the material powder through the piezoelectric nozzle of the 3D printer with an adhesive (ink). After the previous layer is bonded, the molding work box is lowered a distance (layer thickness) and another layer of powder is spread. Under computer control, the nozzle selectively sprays the adhesive to build the layer based on the molding data information. In this way, the powder is fed, spread and sprayed layer by layer repeatedly, and finally a three-dimensional powder is bonded to obtain the guide vane blank.

[0095] Optionally, 10061 can be implemented as follows:

[0096] (1) Establish a three-dimensional model of the guide vane.

[0097] (2) In combination with the external dimensions of the three-dimensional model, the guide vane blank is obtained by using additive manufacturing technology, and the external dimensions of the guide vane blank have a processing allowance of no less than 1 mm relative to the target external dimensions of the guide vane.

[0098] In this embodiment, according to the three-dimensional model of the guide vane, when the guide vane blank is printed, a method of reserving margins for each size of its outer surface is adopted, that is, according to the size of the theoretical three-dimensional model, the outer surface is expanded outward by 1 to 1.5 mm, so that the actual molding size is 1 to 1.5 mm larger than the theoretical size. According to the empirical evaluation of the simulated deformation, the outer surface of the guide vane blank has a machining margin of 1 to 1.5 mm, which is sufficient to ensure that the guide vane can offset the influence of its deformation in the subsequent processing process.

[0099] 10062: Stress relief annealing is performed on the guide vane blank.

[0100] The guide vane blanks manufactured by 3D printing will have accumulated stress inside. Through this process, most of the thermal stress of the guide vane blanks during the 3D printing process can be basically eliminated, which can provide basic guarantee for the stability of the subsequent machining dimensions.

[0101] The so-called stress relief annealing process is to load the parts into a heat treatment furnace, then slowly heat the heat treatment furnace to a specified temperature and keep it warm for a period of time, and then slowly cool it down, so as to achieve the purpose of improving the overall residual stress level of the parts.

[0102] In this embodiment, 10062 can be implemented in the following manner:

[0103] (1) Place the guide vane blank in a heat treatment furnace. (2) Heat the heat treatment furnace to 500-600°C within 1.5 hours and keep it at this temperature for at least 2 hours. (3) Take the guide vane blank out of the heat treatment furnace and place it in the air to cool naturally.

[0104] Through this process, most of the thermal stress of the guide vane blank during the 3D printing process is basically eliminated, providing basic guarantee for the stability of the subsequent machining dimensions.

[0105] 10063: The outer surface of the guide vane blank after stress relief annealing is rough-machined and fine-machined to obtain a guide vane molded part.

[0106] The outer surface of the guide vane blank is rough-machined and fine-machined, and the guide vane blank can be finally shaped to obtain a guide vane molded part, which can meet the manufacturing accuracy requirements of the guide vane.

[0107] 10064: The guide vane molded part is machined to obtain the guide vane.

[0108] Optionally, step 10064 may be implemented in the following manner:

[0109] (1) The third positioning structure 1030, the fourth positioning structure 1031, the third assembly hole 10301 and the fourth assembly hole 10302 are respectively processed at both ends of the guide vane forming part. (2) The guide vane forming part with the assembly holes is repaired and polished.

[0110] S1007: Place a plurality of guide vanes between the outer ring frame and the hub body.

[0111] Combination Fig.11 The third positioning structure 1030 of each guide vane 103 is located in the corresponding first positioning structure 1020 of the guide vane 103 and is mutually engaged, the second positioning structure 1010 corresponding to each guide vane 103 is located in the fourth positioning structure 1031 of the guide vane 103 and is mutually engaged, the third assembly hole 10301 is coaxial with the first assembly hole 10200 corresponding to the guide vane 103, and the fourth assembly hole 10302 is coaxial with the second assembly hole 1011 corresponding to the guide vane 103. The second inclined surface 10201 is in contact with the first inclined surface 10300.

[0112] S1008: Connectors are inserted into the coaxially arranged first assembly hole and the third assembly hole, and into the coaxially arranged second assembly hole and the fourth assembly hole to obtain a catheter.

[0113] In this embodiment, the connecting member is a locking screw. By locking the screws in the first assembly hole and the third assembly hole, and locking the screws in the second assembly hole and the fourth assembly hole, the guide vane, the outer ring frame and the hub body can be assembled as a whole, thereby obtaining a guide tube.

[0114] S1009: Finishing the catheter.

[0115] Fig.12 is a front view of a catheter provided by an embodiment of the present disclosure, combined with Fig.12 According to the drawing requirements, the positioning joints of the duct and other components are finely processed so that the guide vanes can be assembled in the propeller.

[0116] The above-mentioned manufacturing method avoids many disadvantages of integral casting by assembling the catheter, simplifies the manufacturing process of parts, and changes the serial manufacturing process of the overall manufacturing into a parallel process, greatly improving production efficiency. In addition, the assembly manufacturing method also greatly improves the maintainability of the product. When a part in the catheter is damaged, only the damaged part needs to be replaced without scrapping the entire catheter, which can greatly shorten the maintenance cycle of the thruster and reduce maintenance costs.

[0117] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for manufacturing a thruster catheter, characterized in that: The production method comprises: An outer ring frame is provided, wherein the outer ring frame has a plurality of first positioning structures and a plurality of first assembly holes, wherein the plurality of first positioning structures are evenly spaced along the circumference of the outer ring frame, and the plurality of first assembly holes correspond one-to-one to the plurality of first positioning structures, each of the plurality of first assembly holes extends along the axial direction of the outer ring frame, and the first assembly hole is located in the corresponding first positioning structure; A hub body is provided, wherein the hub body has a plurality of second positioning structures and a plurality of second assembly holes, wherein the plurality of second positioning structures are evenly arranged along the circumference of the hub body, and the plurality of second assembly holes correspond one-to-one to the plurality of second positioning structures, and each of the plurality of second assembly holes extends along the axial direction of the outer ring frame, and the second assembly holes are arranged close to the corresponding second positioning structures; A plurality of guide vanes are provided, each of the plurality of guide vanes having a third positioning structure, a fourth positioning structure, a third assembly hole and a fourth assembly hole, the third positioning structure and the third assembly hole are both located at a first end of the guide vane along the radial direction of the outer ring frame, the third assembly hole is arranged close to the corresponding third positioning structure, the fourth positioning structure and the fourth assembly hole are both located at a second end of the guide vane along the radial direction of the outer ring frame, and the fourth assembly hole is arranged close to the corresponding fourth positioning structure; The plurality of guide vanes are placed between the outer ring frame and the hub body, so that the third positioning structure of each guide vane is mutually engaged with a corresponding first positioning structure, the fourth positioning structure is mutually engaged with a corresponding second positioning structure, the third assembly hole is coaxial with the corresponding first assembly hole, and the fourth assembly hole is coaxial with the corresponding second assembly hole; Connecting pieces are inserted into the coaxially arranged first assembly hole and the third assembly hole, and the coaxially arranged second assembly hole and the fourth assembly hole, to obtain the conduit.

2. The method for manufacturing a catheter according to claim 1, characterized in that: Providing an outer ring frame comprises: The inner ring plate, the middle flange, the suspension connection flange and multiple ear-shaped outer plates are processed separately; The inner ring plate, the middle flange, the suspension connection flange and the plurality of ear-shaped outer plates are welded together, so that the middle flange and the suspension connection flange are respectively located at two ends of the inner ring plate, and the first end of each ear-shaped outer plate in the plurality of ear-shaped outer plates is connected to the suspension connection flange, and the second end of the ear-shaped outer plate is connected to the middle flange, to obtain the welded part; The welded parts are machined so that each of the ear-shaped outer panels has a first positioning structure and a first assembly hole.

3. The method for manufacturing a catheter according to claim 2, characterized in that: The first positioning structure extends in a direction from the first end to the second end of the ear-shaped outer plate, and the first assembly hole is located at the first positioning structure near the second end of the ear-shaped outer plate.

4. The method for manufacturing a catheter according to claim 2, characterized in that: The step of welding the inner ring plate, the middle flange, the suspension connection flange and the plurality of ear-shaped outer plates together comprises: Coaxially sleeve the middle flange outside the first end of the inner ring plate, and weld the inner ring wall of the middle flange to the inner ring plate; Arranging the suspension connection flange at the second end of the inner ring plate, and welding the outer ring wall of the suspension connection flange to the inner ring plate; The multiple ear-shaped outer plates are evenly spaced along the circumference of the suspension connecting flange, and the first end of each ear-shaped outer plate of the multiple ear-shaped outer plates is welded to the suspension connecting flange, the second end of the ear-shaped outer plate is welded to the annular surface of the middle flange, and the middle part of the ear-shaped outer plate is welded to the inner ring plate.

5. The method for manufacturing a catheter according to any one of claims 1 to 4, characterized in that: The method provides a plurality of guide vanes, including: Any guide vane among the plurality of guide vanes is manufactured in the following manner: The guide vane blank is obtained by additive manufacturing technology; Performing stress relief annealing on the guide vane blank; Performing rough machining and fine machining on the outer surface of the guide vane blank after stress relief annealing to obtain a guide vane formed part; The guide vane molded part is machined to obtain the guide vane.

6. A catheter, characterized in that: The conduit comprises a hub body (101), an outer ring frame (102) and a plurality of guide vanes (103); the hub body (101) and the outer ring frame (102) are coaxially arranged, and the outer ring frame (102) is located outside the hub body (101); The outer ring frame (102) has a plurality of first positioning structures (1020) and a plurality of first assembly holes (10200), the plurality of first positioning structures (1020) are evenly spaced along the circumference of the outer ring frame (102), and the plurality of first assembly holes (10200) correspond one-to-one to the plurality of first positioning structures (1020), each of the plurality of first assembly holes (10200) extends along the axial direction of the outer ring frame (102), and the first assembly hole (10200) is located in the corresponding first positioning structure (1020); The hub body (101) has a plurality of second positioning structures (1010) and a plurality of second assembly holes (1011), the plurality of second positioning structures (1010) are evenly spaced along the circumference of the hub body (101), and the plurality of second assembly holes (1011) correspond one-to-one to the plurality of second positioning structures (1010), each of the plurality of second assembly holes (1011) extends along the axial direction of the outer ring frame (102), and the second assembly holes (1011) are arranged close to the corresponding second positioning structures (1010); The plurality of guide vanes (103) are uniformly arranged circumferentially between the hub body (101) and the outer ring frame (102); each guide vane (103) in the plurality of guide vanes (103) has a third positioning structure (1030), a fourth positioning structure (1031), a third assembly hole (10301) and a fourth assembly hole (10302); the third positioning structure (1030) and the third assembly hole (10301) are both located at a first end of the guide vane (103) along the radial direction of the outer ring frame (102); the third assembly hole (10301) is arranged close to the corresponding third positioning structure (1030); the fourth positioning structure (1031) and the fourth assembly hole (10302) are arranged close to the corresponding third positioning structure (1030); (10302) are located at the second end of the guide vane (103) along the radial direction of the outer ring frame (102), the fourth assembly hole (10302) is arranged close to the corresponding fourth positioning structure (1031), the third positioning structure (1030) of each guide vane (103) is mutually engaged with a corresponding first positioning structure (1020), the fourth positioning structure (1031) is mutually engaged with a corresponding second positioning structure (1010), the third assembly hole (10301) is coaxially connected with the corresponding first assembly hole (10200), and the fourth assembly hole (10302) is coaxially connected with the corresponding second assembly hole (1011).

7. The catheter according to claim 6, characterized in that The first positioning structure (1020) and the fourth positioning structure (1031) are both slots, the second positioning structure (1010) and the third positioning structure (1030) are both protrusions, the third positioning structure (1030) is located in the first positioning structure (1020), and the second positioning structure (1010) is located in the fourth positioning structure (1031).

8. The catheter according to claim 7, characterized in that The guide vane (103) comprises a first connection portion (131), a second connection portion (132) and a blade body (133), wherein the first connection portion (131) and the second connection portion (132) are respectively connected to two ends of the blade body (133) along the radial direction of the outer ring frame (102); The first connecting portion (131) is a bent structure, a first portion of the first connecting portion (131) is located inside the outer ring frame (102), a second portion of the first connecting portion (131) is located outside the outer ring frame (102), the third positioning structure (1030) is located in the first connecting portion (131), and the third assembly hole (10301) is located in the second portion of the first connecting portion (131); The fourth positioning structure (1031) and the fourth assembly hole (10302) are located in the second connecting portion (132).

9. The catheter according to claim 8, characterized in that The third positioning structure (1030) has a first inclined surface (10300), and along the direction from the first part to the second part of the first connecting portion (131), the first inclined surface (10300) extends outward along the radial direction of the outer ring frame (102); The first positioning structure (1020) has a second inclined surface (10201) that is in contact with the first inclined surface (10300).

10. The catheter according to claim 8, characterized in that The hub body (101) comprises an axial diameter section (11), a ring sleeve (12) and a plurality of fixing seats (13); the ring sleeve (12) is sleeved on the outside of the middle portion of the axial diameter section (11); the plurality of fixing seats (13) are evenly connected to the outer periphery of the axial diameter section (11) at circumferential intervals and are connected to the same end surface of the ring sleeve (12); The plurality of second positioning structures (1010) correspond one to one with the plurality of fixing seats (13), and the second positioning structures (1010) are long ribs, the length direction of the second positioning structures (1010) is the axial direction of the shaft diameter section (11), one end of the second positioning structure (1010) is connected to the corresponding fixing seat (13), and the other end is connected to the shaft diameter section (11), and the second assembly hole (1011) is located in the corresponding second positioning structure (1010); The second connecting portion (132) has a positioning boss (134) on one side facing the hub body 101, the fourth assembly hole (10302) passes through the positioning boss (134), and the positioning boss (134) is butt-jointed with a corresponding one of the fixing seats (13).

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