Propeller fairing cap and machining method

Abstract

The propeller fairing cap comprises a fairing cap body, a conical structure is formed at the front end of the fairing cap body, a fairing cap cavity is formed in the middle of the fairing cap body, and a fairing positioning part matched with a guide vane body for installation is formed in the conical structure in the radial direction; according to the propeller fairing cap in the technical scheme, the conical structure can have a better fairing effect, a cavity structure is formed in the fairing cap, the weight of a workpiece is conveniently reduced, a supporting rib plate is additionally arranged in an inner cavity, and a sealing plate is welded to the end face, so that the overall structural strength of the fairing cap is guaranteed, and meanwhile deformation is avoided in the clamping machining process.

Description

Technical Field

[0001] The invention relates to the field of propeller processing, and in particular to a propeller guide cap and a processing method thereof. Background Art

[0002] A water jet propulsion system is a type of propulsion system that uses the reaction force of the jet water flow to drive the ship forward. It is composed of a water pump, a pipe, a suction port, and a nozzle, and can change the direction of the water flow through the nozzle to achieve ship control. It has good controllability, especially for shallow water channels with muddy bottoms. Water jet propulsion systems have good adaptability.

[0003] The water jet guide cap is an important part of the ship propulsion system. Its processing accuracy and surface quality directly affect the propulsion efficiency and ship performance. The existing guide cap needs to consider the issue of lightweight while taking into account its internal structural strength and processing convenience. If the interior is set as a cavity structure, the clamping force needs to be guaranteed during clamping processing, so the end of the workpiece is easily deformed.

[0004] Therefore, in order to solve the above problems, a propeller guide cap and a processing method are needed to solve the above production problems. Summary of the invention

[0005] In view of this, the propeller guide cap and processing method of the present technical solution have a conical structure that can have a better guide effect. By forming a cavity structure inside the guide cap, it is convenient to reduce the weight of the workpiece, and supporting ribs are added to the inner cavity and sealing plates are welded on the end face, so that the overall structural strength is guaranteed, while deformation is avoided during the clamping process.

[0006] A propeller guide cap comprises a guide cap body, a front end of the guide cap body forms a conical structure, a middle part of the guide cap body forms a guide cap cavity, and the conical structure forms a guide positioning part for matching the guide vane body in the radial direction.

[0007] Furthermore, the flow guide positioning portion is provided with a plurality of positioning holes for cooperating with the guide vane body for installation, and the plurality of positioning holes are evenly distributed on the flow guide positioning portion.

[0008] Furthermore, a positioning ring groove is formed at the rear end of the guide cap body inwardly along the radial direction, and a cover plate is provided at the rear end of the guide cap.

[0009] Furthermore, support ribs are provided inside the guide cap cavity, and the support ribs are arranged in a "cross" structure to be fixedly installed in conjunction with the guide cap cavity.

[0010] A method for processing a propeller guide cap comprises the following steps:

[0011] S1: Install the guide cap body on the machine tool, perform marking processing and ensure that the workpiece has machining allowance;

[0012] S2: Clamp the small end, calibrate according to the markings, turn the large end surface flat and leave a margin; after the small end is processed, clamp the large end, calibrate, turn the small end and ensure the total length of the guide cap, and turn the welding cover plate;

[0013] S3: Weld the guide cap and the welding cover plate to ensure the size and quality of the weld;

[0014] S4: Clamp the small end and calibrate it, turn the end surface of the large end, and turn the positioning ring groove;

[0015] S5: finishing the surface of the cone structure;

[0016] S6: sequentially processing the positioning holes on the flow guide positioning part;

[0017] S7: Remove burrs and flash from the workpiece surface, chamfer the guide positioning part, and then conduct water flow test in conjunction with the guide vane test assembly;

[0018] S8: After installation with the guide vane body, perform a water pressure test on the inner cavity to ensure there is no sweating or leakage;

[0019] S9: Clean the workpiece surface and spray the guide cap shape.

[0020] The beneficial effects of the present invention are as follows: the propeller guide cap and processing method of the present technical solution, whose conical structure can have a better guide effect, forms a cavity structure inside the guide cap, thereby facilitating the reduction of the weight of the workpiece, and adds supporting ribs to the inner cavity and welds a sealing plate on the end face, so that its overall structural strength is guaranteed, while deformation is avoided during the clamping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 It is a schematic cross-sectional view of the whole of the present invention;

[0023] Figure 2 It is an axonometric schematic diagram of the present invention;

[0024] Figure 3 It is a schematic diagram of the guide vane body of the present invention. DETAILED DESCRIPTION

[0025] Figure 1 It is a schematic cross-sectional view of the whole of the present invention; Figure 2 It is an axonometric schematic diagram of the present invention; Figure 3The present invention is a schematic diagram of the guide vane body; as shown in the figure, a propeller guide cap, characterized in that: comprising a guide cap body 1, the front end of the guide cap body 1 (the front end is Figure 1 The propeller guide cap of the present technical scheme has a conical structure that can have a better guide effect. By forming a cavity structure inside the guide cap, it is convenient to reduce the weight of the workpiece. Support ribs 71 and end face welding sealing plates 7 are added to the inner cavity to ensure the overall structural strength and avoid deformation during the clamping process.

[0026] In this embodiment, the guide positioning portion 3 is provided with a plurality of positioning holes 4 for matching the guide vane body, and the plurality of positioning holes 4 are evenly distributed on the guide positioning portion 3. The structure of the guide positioning portion 3 is formed outwardly along the axial direction along the rear edge radial direction of the conical structure, and a plurality of evenly distributed positioning holes 4 are formed on the end surface thereof, so as to match the guide vane body 8 for positioning and locking installation.

[0027] In this embodiment, the rear end of the guide cap body is processed inwardly along the radial direction to form a positioning ring groove 6, and the rear end of the guide cap is provided with a cover plate. The end of the guide cap body is grooved to form a ring groove structure and then a sealing ring is installed to ensure the sealing of the structure after the components are installed. The cover plate 7 is installed at the end by welding to play a role of positioning support, avoiding deformation during the clamping process and also improving the support strength of the end.

[0028] In this embodiment, the guide cap cavity is provided with support ribs 71, which are arranged in a "cross" structure and fixedly installed with the guide cap cavity. The support ribs 71 are fixedly arranged in the guide cap cavity, supporting the central structure and enhancing the internal performance of the inner cavity.

[0029] A method for processing a propeller guide cap comprises the following steps:

[0030] S1: Install the guide cap body 1 on the machine tool, perform marking processing and ensure that the workpiece has a machining allowance; install the blank on the machine tool, perform marking processing and check the wall thickness of the workpiece to have a machining allowance and confirm that the wall thickness is uniform;

[0031] S2: Clamp the small end, calibrate according to the markings, flatten the large end surface and leave a margin; after the small end is processed, clamp the large end, calibrate, machine the small end and ensure the total length of the guide cap, and turn the welding cover plate; clamp the small end (i.e. the left end), calibrate and process the large end, after the processing is completed, clamp the right end and process the left end conical surface, after the overall rough processing is completed, turn the outer circle of the welding plate;

[0032] S3: Weld the guide cap and the welding cover plate to ensure the quality of the weld size; Weld the guide cap and the cover plate to ensure the quality of the weld, and then perform stress relief annealing on the entire workpiece;

[0033] S4: Clamp the small end and calibrate it, turn the large end face, and turn the positioning ring groove; clamp the left end of the workpiece and turn the right end of the workpiece, and after completion, the positioning ring groove is machined, and the depth and size of the ring groove are checked to meet the process requirements;

[0034] S5: performing fine machining on the surface of the conical structure 2; performing fine machining on the surface of the conical structure 2 to ensure that the surface meets the process requirements;

[0035] S6: Processing the positioning holes on the flow guide positioning part in sequence; processing the holes of the flow guide positioning part 3 to produce a corresponding number of positioning holes according to the process requirements;

[0036] S7: Remove burrs and flash from the workpiece surface, chamfer the guide positioning part, and then conduct a water flow test in conjunction with the guide vane body trial assembly; Grind out burrs and flash from the workpiece surface, chamfer the part, and conduct a water flow test in conjunction with the guide vane body trial assembly to ensure smooth transition along the water flow direction without convex shoulders or depressions;

[0037] S8: After installation with the guide vane body, perform an inner cavity water pressure test to ensure that there is no sweating or leakage; perform an inner cavity water pressure test with the guide vane body, the water pressure is 0.4MPa, and the pressure is maintained for 30 minutes. The structure must not have sweating, leakage, etc.; then clean the workpiece surface, perform anodizing treatment on the surface, and then perform hot water sealing treatment; test the oxide film thickness and appearance;

[0038] S9: Clean the workpiece surface and spray the guide cap shape. Clean the workpiece surface and spray its structure to ensure uniform paint thickness, wrap and protect it, and pack it into the warehouse.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A propeller guide cap, characterized in that: It comprises a guide cap body, the front end of which forms a cone-shaped structure, the middle of which forms a guide cap cavity, and the cone-shaped structure forms a guide positioning part for installing the guide vane body in a radial direction.

2. The propeller guide cap according to claim 1, characterized in that: The flow guide positioning portion is provided with a plurality of positioning holes for matching the installation of the guide vane body, and the plurality of positioning holes are evenly distributed on the flow guide positioning portion.

3. The propeller guide cap according to claim 2, characterized in that: A positioning ring groove is formed at the rear end of the guide cap body inwardly along the radial direction, and a cover plate is arranged at the rear end of the guide cap.

4. The propeller guide cap according to claim 3, characterized in that: The guide cap cavity is provided with supporting ribs, and the supporting ribs are arranged in a "cross" structure and fixedly installed in cooperation with the guide cap cavity.

5. A method for processing a propeller guide cap according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: Install the guide cap body on the machine tool, perform marking processing and ensure that the workpiece has machining allowance; S2: Clamp the small end, calibrate according to the markings, turn the large end surface flat and leave a margin; after the small end is processed, clamp the large end, calibrate, turn the small end and ensure the total length of the guide cap, and turn the welding cover plate; S3: Weld the guide cap and the welding cover plate to ensure the size and quality of the weld; S4: Clamp the small end and calibrate it, turn the end surface of the large end, and turn the positioning ring groove; S5: finishing the surface of the cone structure; S6: sequentially processing the positioning holes on the flow guide positioning part; S7: Remove burrs and flash from the workpiece surface, chamfer the guide positioning part, and then conduct water flow test in conjunction with the guide vane test assembly; S8: After installation with the guide vane body, perform a water pressure test on the inner cavity to ensure there is no sweating or leakage; S9: Clean the workpiece surface and spray the guide cap shape.

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