Carburized surface protection sleeve for cadmium plating of propeller shell

Abstract

The utility model relates to a carburized surface protective sleeve for cadmium plating of a propeller shell, which comprises an elastic sleeve, abutting ends used for elastically abutting against the inner wall of the propeller shell are formed on the outer walls of the two ends of the elastic sleeve, and an annular packing surface is formed on the outer wall of the elastic sleeve and located between the two abutting ends. The annular packing surface can directly face the carburizing surface of the propeller shell to isolate the carburizing surface; the elastic sleeve is designed on the basis of the cyaniding cadmium plating technological process, on the basis of the structure of the carburized surface of the propeller shell and on the basis of the size of the carburized surface, the elastic sleeve is fully attached to the carburized surface, and a power line is completely shielded, so that a cadmium plating layer is prevented from being deposited on a shielded part, and the elastic sleeve can easily enter and exit from an inner cavity of the carburized surface of the propeller shell; rapid mounting and dismounting are realized, a carburized surface can be fully attached, and shielding of a power line is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to propeller maintenance technical field especially relates to a propeller propeller shell cadmium plating is with carburizing surface protection sleeve. BACKGROUND

[0002] The material of the propeller propeller shell of a certain type is carburizing steel 12Cr2Ni4A, and the ring groove and its connecting area are all carburizing surfaces. The propeller shell needs to be re-plated with cadmium to obtain a new protective layer during repair. The profile size precision of the ring groove of the propeller propeller shell is high, and the roughness requirement is strict. If there is cadmium deposition, it may cause ball jamming, thereby affecting the working state of the propeller and even flight safety. Therefore, the carburizing surface needs to be protected during cadmium plating, both to ensure that the carburizing surface has no cadmium plating layer and to ensure that the roughness of the carburizing surface is not affected.

[0003] Currently, the power lines can be blocked by physical shielding to prevent deposition of the plating layer at the shielded parts. Among them, the commonly used methods include: coating strippable glue and pasting adhesive tape, etc.

[0004] However, the coating of strippable glue and the pasting of adhesive tape have the following disadvantages:

[0005] 1) The inner hole arc surface of the propeller propeller shell is not easy to operate, and the adhesive tape is not easy to paste to the concave-convex transition surface of the carburizing surface, and the operation efficiency is low;

[0006] 2) The adhesive property of the glue is weakened at low temperature, and it is not resistant to the temperature of the electrolytic oil solution, and the shielding function is lost after falling off, which may cause local deposition of cadmium layer;

[0007] 3) When tearing, there may be glue residue on the surface of the part.

[0008] In summary, the existing physical shielding structure cannot effectively protect the carburizing surface of the propeller propeller shell. UTILITY MODEL CONTENTS

[0009] Therefore, it is necessary to provide a propeller propeller shell cadmium plating carburizing surface protection sleeve to solve the problem that the existing physical shielding structure cannot effectively protect the carburizing surface of the propeller propeller shell.

[0010] The utility model provides a propeller propeller shell cadmium plating carburizing surface protection sleeve, which comprises an elastic sleeve, the outer wall of both ends of the elastic sleeve is formed with an abutting end for elastically abutting with the inner wall of the propeller propeller shell, and the outer wall of the elastic sleeve and the part between the two abutting ends are formed with an annular sealing surface, which can be arranged opposite to the carburizing surface of the propeller propeller shell to isolate the carburizing surface.

[0011] Further, the inner wall of the propeller shell is formed with a first annular groove away from the opening and located at the edge of the carburized surface, and the side wall of one end of the elastic sleeve is formed with a first annular protrusion which is clamped in the first annular groove.

[0012] Further, the inner diameter of the first annular protrusion is 170-180 mm, the outer diameter of the first annular protrusion is 178-195 mm, and the thickness of the first annular protrusion is 15-20 mm.

[0013] Further, the outer wall of both ends of the first annular protrusion is provided with a first round corner.

[0014] Further, the radius of the first round corner is 5-8 mm.

[0015] Further, the inner wall of the propeller shell is formed with a second annular groove close to the opening and located at the edge of the carburized surface, and the side wall of one end of the elastic sleeve is formed with a second annular protrusion which is clamped in the second annular groove.

[0016] Further, the inner diameter of the second annular protrusion is 170-180 mm, the outer diameter of the second annular protrusion is 195-200.1 mm, and the thickness of the second annular protrusion is 22-27 mm.

[0017] Further, the outer wall of the side of the second annular protrusion close to the middle part of the elastic sleeve is provided with a second round corner.

[0018] Further, the radius of the second round corner is 5-8 mm.

[0019] Further, the elastic sleeve is a rubber sleeve.

[0020] Compared with the prior art, based on the process flow of cyanide-based cadmium plating, the structure of the carburized surface of the propeller shell is used as the basis, and the size thereof is used as the basis to design the elastic sleeve, so that the elastic sleeve is fully matched with the carburized surface and completely shields the power line, thereby avoiding the deposition of a cadmium plating layer at the shielding part, the elastic sleeve can easily enter and exit the inner cavity of the carburized surface of the propeller shell, realizes rapid installation and disassembly, can be fully matched with the carburized surface, and realizes the shielding of the power line. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The overall structure schematic view of the carburized surface protective sleeve for propeller shell cadmium plating provided by the embodiment of the present application is shown in the figure.

[0022] Figure 2 The partial view of the carburized surface part of the propeller shell is shown in the figure. DETAILED DESCRIPTION

[0023] The preferred embodiments of the utility model are specifically described below in combination with the drawings, wherein the drawings form a part of the present application and are used together with the embodiments of the utility model to explain the principles of the utility model, but are not used to limit the scope of the utility model.

[0024] In the cadmium process, the carburized surface of the propeller shell has a cadmium plating layer deposited thereon, which causes the ball to be stuck when rolling on the carburized surface, affecting the working state of the propeller and even flight safety. The protective sleeve is provided to avoid the above-mentioned situation.

[0025] As shown in Figure 1 The utility model discloses a carburized surface protective sleeve for propeller shell cadmium plating, the outer wall of the both ends of elastic sleeve 100 is formed with the abutment end for the elastic abutment with the inner wall of propeller shell M, and the part of the outer wall of elastic sleeve 100 between the two abutment ends forms an annular sealing surface, which can be arranged opposite the carburized surface of propeller shell M to isolate the carburized surface.

[0026] In implementation, based on the process flow of cyanide cadmium plating, the elastic sleeve 100 is designed based on the structure of the carburized surface of the propeller shell M and its size, so that the elastic sleeve 100 is fully attached to the carburized surface and completely shields the power line, thereby avoiding the deposition of cadmium plating layer at the shielding part. The elastic sleeve 100 can easily enter and exit the inner cavity of the carburized surface of the propeller shell, realize quick installation and disassembly, fully attach to the carburized surface, and shield the power line.

[0027] In the design of the above-mentioned elastic sleeve 100, the following conditions should be met:

[0028] (1) It should be able to fully attach to the carburized surface to prevent acid from penetrating into the carburized surface and causing corrosion;

[0029] (2) It should be able to shield the power line to ensure that the carburized surface is not plated with a cadmium layer;

[0030] (3) It should be able to withstand strong alkaline cyanide cadmium plating solution without contaminating the tank liquid;

[0031] (4) It should facilitate the flow of cyanide cadmium plating solution;

[0032] (5) The material has good flexibility, and the installation and disassembly after plating should be simple and convenient, and it can be reused.

[0033] As shown in Figure 2To this end, in the embodiment, a first annular groove M1 is formed on the inner wall of the propeller boss M, away from the opening and at the edge of the carburized surface, and a first annular protrusion 110 is formed on the side wall of one end of the elastic sleeve 100, which is clamped in the first annular groove M1. This can effectively fit the edge of one end of the elastic sleeve 100 to the carburized surface. The first annular protrusion 110 and the second annular protrusion 120 can define the longitudinal position of the elastic sleeve 100 relative to the propeller boss M.

[0034] In one embodiment, the inner diameter of the first annular protrusion 110 is 170-180 mm, the outer diameter of the first annular protrusion 110 is 178-195 mm, and the thickness of the first annular protrusion 110 is 15-20 mm. Preferably, the inner diameter of the first annular protrusion 110 is 178 mm, the outer diameter of the first annular protrusion 110 is 191.1 mm, and the thickness of the first annular protrusion 110 is 17 mm.

[0035] To facilitate the disassembly of the elastic sleeve 100, in one embodiment, a first fillet 130 is provided on the outer wall of both ends of the first annular protrusion 110. The radius of the first fillet 130 is 5-8 mm. Preferably, the radius of the first fillet 130 is 6.54 mm.

[0036] As shown in FIG. 1, Figure 2 In the embodiment, a second annular groove M2 is formed on the inner wall of the propeller boss M, close to the opening and at the edge of the carburized surface, and a second annular protrusion 120 is formed on the side wall of one end of the elastic sleeve 100, which is clamped in the second annular groove M2.

[0037] In one embodiment, the inner diameter of the second annular protrusion 120 is 170-180 mm, the outer diameter of the second annular protrusion 120 is 195-200.1 mm, and the thickness of the second annular protrusion 120 is 22-27 mm. Preferably, the inner diameter of the second annular protrusion 120 is 178 mm, the outer diameter of the second annular protrusion 120 is 198.1 mm, and the thickness of the second annular protrusion 120 is 25 mm.

[0038] To facilitate the disassembly of the elastic sleeve 100, in one embodiment, a second fillet 140 is provided on the outer wall of the second annular protrusion 120 close to the side of the middle part of the elastic sleeve 100. The radius of the second fillet 140 is 5-8 mm. Preferably, the radius of the second fillet 140 is 6.54 mm.

[0039] The entire elastic sleeve 100 covers the carburized surface of the propeller boss M, which can shield the power lines and prevent the carburized surface from being plated with a cadmium layer,

[0040] In the embodiment, the elastic sleeve 100 is a rubber sleeve, which can be made of 1140 natural rubber, can resist strong alkaline cyanide plating cadmium solution, does not pollute the tank liquid, and has good flexibility, simple and convenient operation during insulation protection installation and post-plating disassembly, and can be repeatedly used.

[0041] The inner diameter of the elastic sleeve 100 is 168 mm, the elastic sleeve 100 is designed to facilitate the flow of cyanide plating cadmium solution, and the cyanide plating cadmium solution smoothly passes through the corresponding region of the carburized surface.

[0042] Compared with the prior art: based on the process flow of cyanide plating cadmium, based on the structure of the carburized surface of the propeller shell M, and based on the size, the elastic sleeve 100 is designed, the elastic sleeve 100 is fully matched with the carburized surface, and the power line is completely shielded, so that the cadmium plating layer is avoided to be deposited at the shielding part, the elastic sleeve 100 can easily enter and exit the inner cavity of the carburized surface of the propeller shell, realizes rapid installation and disassembly, can be fully matched with the carburized surface, and realizes shielding of the power line.

[0043] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A carburized surface protective jacket for cadmium plating of a propeller blade shell, characterized by, The utility model relates to a propeller propeller shell sealing device, including: The outer wall of the elastic sleeve is provided with an abutting end at both ends for elastically abutting with the inner wall of the propeller propeller shell, and the part of the outer wall of the elastic sleeve between the two abutting ends is provided with an annular sealing surface which can be arranged opposite the carburized surface of the propeller propeller shell to isolate the carburized surface.

2. The cadmium plated propeller hub and shroud according to claim 1, wherein, The inner wall of the propeller propeller shell is provided with a first ring groove away from the opening and at the edge of the carburized surface, and the side wall of one end of the elastic sleeve is provided with a first annular protrusion which is clamped in the first ring groove.

3. The cadmium plated propeller hub and shroud according to claim 2, wherein, The inner diameter of the first annular protrusion is 170-180mm, the outer diameter of the first annular protrusion is 178-195mm, and the thickness of the first annular protrusion is 15-20mm.

4. The cadmium plated propeller hub and shroud according to claim 2, wherein, The outer wall of both ends of the first annular protrusion is provided with a first round corner.

5. The cadmium plated propeller hub and shroud according to claim 4, wherein, The radius of the first round corner is 5-8mm.

6. The cadmium plated propeller hub and shroud according to claim 1, wherein, The inner wall of the propeller propeller shell is provided with a second ring groove close to the opening and at the edge of the carburized surface, and the side wall of one end of the elastic sleeve is provided with a second annular protrusion which is clamped in the second ring groove.

7. The cadmium plated propeller hub and shroud according to claim 6, wherein, The inner diameter of the second annular protrusion is 170-180mm, the outer diameter of the second annular protrusion is 195-200.1mm, and the thickness of the second annular protrusion is 22-27mm.

8. The cadmium plated propeller hub and shroud according to claim 6, wherein, The outer wall of the side of the second annular protrusion close to the middle part of the elastic sleeve is provided with a second round corner.

9. The cadmium plated propeller hub and shroud according to claim 8, wherein, The radius of the second round corner is 5-8mm.

10. The cadmium plated propeller hub and shroud according to claim 1, wherein, The elastic sleeve is a rubber sleeve.

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