High-strength marine titanium alloy shaft capable of preventing seawater corrosion and avoiding electric leakage

Abstract

The utility model discloses a high-strength marine titanium alloy shaft capable of preventing seawater corrosion and avoiding electric leakage, and belongs to the technical field of transmission shafts. The titanium alloy shaft comprises a shaft body and a transmission part detachably connected with the shaft body. The shaft body comprises a main shaft; the extension piece is integrally formed with the main shaft and used for being connected with a driving part; the transmission part comprises a transmission shaft detachably connected with the main shaft; and the transmission part extends outwards along the other end of the transmission shaft and is used for connecting ship body fan blades. According to the seawater-corrosion-resistant non-electric-leakage high-strength marine titanium alloy shaft, the whole shaft is divided into the shaft body and the transmission part, if crevice corrosion occurs to the end, connected with the driving part, of the shaft body due to seawater corrosion and stress, the shaft body can be replaced, a new shaft body is taken to be installed on the transmission part, and replacement can be completed; overall replacement is not needed, and the maintenance cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission shafts, and particularly relates to a high-strength marine titanium alloy shaft that resists seawater corrosion and does not leak electricity. Background Technique

[0002] A transmission shaft is a rotating body with a high rotational speed and few supports. Therefore, its dynamic balance is crucial. Generally, a transmission shaft needs to undergo a dynamic balance test before leaving the factory and is adjusted on a balancing machine. For a vehicle with a front-mounted engine and rear-wheel drive, it is the shaft that transmits the rotation of the transmission to the main reducer. It can be several sections, and the sections can be connected by universal joints.

[0003] A transmission shaft is used to transmit power between the fan blade on the hull and the drive module, enabling the drive module to drive the fan blade to rotate through the transmission shaft, thereby driving the hull to move.

[0004] Since the marine environment is a complex corrosion environment, and waves, tides, and currents generate low-frequency reciprocating stresses and impacts on metal components, crevice corrosion is likely to occur at the joints of the hull transmission shaft. During hull maintenance, the entire transmission shaft needs to be disassembled and replaced, which is time-consuming and laborious, and the transmission shaft is costly, resulting in a high cost for replacing the entire shaft. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a high-strength marine titanium alloy shaft that resists seawater corrosion and does not leak electricity.

[0006] The technical solution of the utility model is: a high-strength marine titanium alloy shaft that resists seawater corrosion and does not leak electricity, including a shaft body and a transmission part detachably connected thereto; the shaft body includes: a main shaft; an extension integrally formed with the main shaft for connecting the drive part; the transmission part includes: a transmission shaft detachably connected to the main shaft; a transmission member extending outward from the other end of the transmission shaft, and this transmission member is used to connect the hull fan blade; an extended convex surface is provided on the connection end surface between the main shaft and the transmission shaft, and a recessed concave surface is formed on the connection end surface between the transmission shaft and the main shaft, and this recessed concave surface is adaptively arranged with the extended convex surface; a fixing mechanism for fixing the shaft body and the transmission part.

[0007] Further, a first connection hole is provided at a position near the other end of the extension, and this first connection hole is connected to the drive module on the hull through a universal joint.

[0008] Further, a second connection hole is provided through the transmission member at a position near the other end, and this second connection hole is connected to the fan blade module on the hull through a universal joint.

[0009] Further, a limiting block is integrally formed in the middle of the extending convex surface. The limiting block is non-circularly arranged. A limiting groove adapted to the limiting block is formed on the sunken concave surface. The limiting block and the limiting groove are seamlessly spliced.

[0010] Further, a plurality of spaced strengthening blocks are provided on the outer ring of the extending convex surface. Strengthening grooves corresponding to the strengthening blocks are formed on the sunken concave surface, and the strengthening blocks and the strengthening grooves are seamlessly spliced.

[0011] Further, the fixing mechanism includes: a threaded groove formed on the sunken concave surface, a through groove corresponding to the threaded groove and penetrating through the main shaft, and a screw rod penetrating through the through groove and adapted to the threaded groove.

[0012] Further, a countersunk head communicating with the through groove is formed on the main shaft, and the countersunk head is used to hide the screw head of the screw rod.

[0013] Further, both the shaft body and the transmission part are made of titanium alloy, and corrosion-resistant layers are coated on the outer layers of the shaft body and the transmission part.

[0014] The beneficial technical effect of the present utility model is that by dividing the whole shaft into a shaft body and a transmission part, if crevice corrosion occurs at the end of the shaft body connected to the driving part due to seawater corrosion and stress, it can be replaced. Take a new shaft body and transmission part for installation to complete the replacement, without the need for overall replacement, saving maintenance costs. Description of the Drawings

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is a sectional structural schematic diagram of the present utility model;

[0017] Figure 3 is a front structural schematic diagram of the present utility model;

[0018] Figure 4 is a top structural schematic diagram of the present utility model;

[0019] Figure 5 is the present utility model Figure 1 The enlarged structural schematic diagram of part A in.

[0020] The corresponding component names indicated by the numbers and letters in the figure:

[0021] 1. Spindle; 11. Extension piece; 12. First connection hole; 13. Extension convex surface; 14. Limit block; 15. Reinforcement block; 2. Transmission shaft; 21. Transmission part; 22. Second connection hole; 23. Recessed concave surface; 24. Limit groove; 25. Reinforcement groove; 3. Threaded groove; 31. Through groove; 32. Screw; 33. Countersunk head. Detailed implementation manner

[0022] In order to more clearly understand the technical means of the present utility model and implement it in accordance with the content of the specification, the following further describes the detailed implementation manner of the present utility model in combination with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but not to limit the scope of the present utility model.

[0023] See the attached Figures 1-5 As shown in the figure, the high-strength marine titanium alloy shaft for preventing seawater corrosion and leakage of electricity in the first embodiment includes a shaft body and a transmission part detachably connected thereto.

[0024] If the whole shaft is divided into a shaft body and a transmission part, when crevice corrosion occurs at one end of the shaft body connected to the driving part due to seawater corrosion and force, it can be replaced. Take a new shaft body and transmission part for installation to complete the replacement, without the need for overall replacement, saving maintenance costs.

[0025] The shaft body includes: a main shaft 1; an extension piece 11 integrally formed with the main shaft 1 for connecting the driving part. The extension piece 11 can be connected to the output end of the driving part through a universal joint, so that the output end of the driving part can drive the shaft body to rotate.

[0026] The transmission part includes: a transmission shaft 2 detachably connected to the main shaft 1; a transmission piece 21 extending outward along the other end of the transmission shaft 2, which is used to connect the ship's fan blade; the transmission piece 21 can be connected to the fan blade driving the ship's movement through a universal joint. When the shaft body rotates under the drive of the driving part, it can drive the fan blade to rotate, thereby driving the ship to move.

[0027] An extension convex surface 13 is provided on the connection end surface of the main shaft 1 and the transmission shaft 2, and a recessed concave surface 23 is formed on the connection end surface of the transmission shaft 2 and the main shaft 1. The recessed concave surface 23 is adapted to the extension convex surface 13; a fixing mechanism for fixing the shaft body and the transmission part.

[0028] By using the extension convex surface 13 and the recessed concave surface 23, the positioning of the main shaft 1 and the transmission shaft 2 can be more accurate when splicing. The main shaft 1 and the transmission shaft 2 can be fixed by using the fixing mechanism, so that normal transmission operations can be carried out.

[0029] Further, a first connection hole 12 is provided at a position of the extension member 11 near the other end. The first connection hole 12 is connected to the drive module on the hull through a universal joint. The first connection hole 12 can be connected to the universal joint on the drive module, so that the drive module can drive the transmission shaft 2 to rotate through the universal joint.

[0030] Further, a second connection hole 22 is provided through the transmission member 21 near the other end. The second connection hole 22 is connected to the fan module on the hull through a universal joint. The second connection hole 22 can be connected to the universal joint on the fan shaft, so that when the transmission shaft 2 rotates, the fan can be driven to rotate through the universal joint.

[0031] Further, a limiting block 14 is integrally formed in the middle of the extended convex surface 13. The limiting block 14 is non-circularly arranged. A limiting groove 24 adapted to the limiting block 14 is formed in the recessed concave surface 23. The limiting block 14 and the limiting groove 24 are seamlessly spliced.

[0032] Since the limiting block 14 is non-circularly arranged, due to the shape limitation, the transmission shaft 2 can be driven to rotate through the limiting block 14 and the limiting groove 24 when the main shaft 1 rotates. After the main shaft 1 and the transmission shaft 2 are spliced, the limiting block 14 will be inserted into the limiting groove 24. When the main shaft 1 rotates, the transmission shaft 2 can be further driven to rotate through the limiting block 14, avoiding damage to the fixing mechanism due to excessive stress, extending the service life of the fixing mechanism, and improving the rigidity of the main shaft 1 and the transmission shaft 2 during the transmission process. The shape of the limiting block 14 is preferably polygonal, and the production process is simple.

[0033] Further, a plurality of spaced strengthening blocks 15 are provided on the outer ring of the extended convex surface 13. Strengthening grooves 25 corresponding to the strengthening blocks 15 are formed in the recessed concave surface 23, and the strengthening blocks 15 and the strengthening grooves 25 are seamlessly spliced.

[0034] After the main shaft 1 and the transmission shaft 2 are spliced, the strengthening block 15 will be inserted into the strengthening groove 25. Through the cooperation of the strengthening block 15 and the strengthening groove 25, the rigidity of the transmission shaft 2 can be further improved and its connection strength can be increased.

[0035] Further, the fixing mechanism includes: a threaded groove 3 formed in the recessed concave surface 23, a through groove 31 corresponding to the threaded groove 3 and penetrating the main shaft 1, and a screw 32 penetrating the through groove 31 and adapted to the threaded groove 3.

[0036] After the main shaft 1 and the transmission shaft 2 are spliced, the screw 32 can be inserted into the through groove 31. When the screw 32 is inserted into the threaded groove 3 and rotated, the main shaft 1 and the transmission shaft 2 can be tightened, so that the main shaft 1 and the transmission shaft 2 can be fixed. The operation is simple, practical and convenient, and the screw 32 needs to be treated with a corrosion-resistant process to avoid breakage due to seawater erosion.

[0037] During the production process, the through groove 31 and the threaded groove 3 need to avoid the reinforcing groove 25 and the limiting groove 24, and the through groove 31 and the threaded groove 3 are distributed at an annular interval to improve the connection strength.

[0038] Furthermore, a counterbore 33 communicating with the through groove 31 is provided on the main shaft 1, and the counterbore 33 is used to hide the screw head of the screw 32.

[0039] The counterbore 33 can hide the screw 32 of the screw 32, avoiding affecting the appearance, and can protect it to prevent damage to the cross hole.

[0040] Furthermore, both the shaft body and the transmission part are made of titanium alloy, and corrosion-resistant layers are coated on the outer layers of the shaft body and the transmission part.

[0041] Titanium alloy has high strength, good corrosion resistance and high heat resistance. At low and ultra-low temperatures, it can still maintain its mechanical properties. It has a long service life when used in seawater and is not prone to crevice corrosion. Moreover, the conductivity coefficient of titanium alloy is relatively low, so there will be no leakage. The coated corrosion-resistant layer can further improve the corrosion resistance of the main shaft 1 and the transmission shaft 2.

[0042] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high-strength marine titanium alloy shaft that resists seawater corrosion and does not leak electricity, characterized in that, Comprising: A shaft body and a transmission part detachably connected thereto; The shaft body includes: a main shaft (1); an extension piece (11) integrally formed with the main shaft (1) for connecting a driving part; The transmission part includes: a transmission shaft (2) detachably connected to the main shaft (1); a transmission member (21) extending outward from the other end of the transmission shaft (2), and the transmission member (21) is used for connecting a hull fan blade; An extending convex surface (13) is provided on the connecting end surface of the main shaft (1) and the transmission shaft (2), and a recessed concave surface (23) is formed on the connecting end surface of the transmission shaft (2) and the main shaft (1), and the recessed concave surface (23) is arranged to be adapted to the extending convex surface (13); A fixing mechanism for fixing the shaft body and the transmission part.

2. The high-strength marine titanium alloy shaft with seawater corrosion prevention and non-electric leakage according to claim 1, characterized in that, A first connection hole (12) is provided at a position of the extension piece (11) near the other end, and the first connection hole (12) is connected to a driving module on the hull through a universal joint.

3. The high-strength marine titanium alloy shaft with seawater corrosion prevention and non-electric leakage according to claim 1, wherein A second connection hole (22) is penetrated through at a position of the transmission member (21) near the other end, and the second connection hole (22) is connected to a fan blade module on the hull through a universal joint.

4. The high-strength marine titanium alloy shaft with seawater corrosion prevention and non-electric leakage according to claim 1, characterized in that, A limiting block (14) is integrally formed in the middle of the extending convex surface (13), the limiting block (14) is arranged in a non-circular shape, a limiting groove (24) adapted to the limiting block (14) is formed on the recessed concave surface (23), and the limiting block (14) and the limiting groove (24) are spliced in a seamless manner.

5. The high-strength marine titanium alloy shaft with seawater corrosion prevention and non-electric leakage according to claim 1, wherein A plurality of spaced strengthening blocks (15) are provided on the outer ring of the extending convex surface (13), strengthening grooves (25) corresponding to the strengthening blocks (15) are formed on the recessed concave surface (23), and the strengthening blocks (15) and the strengthening grooves (25) are spliced in a seamless manner.

6. The high-strength marine titanium alloy shaft with seawater corrosion prevention and no electric leakage according to claim 1, characterized in that The fixing mechanism includes: a threaded groove (3) formed on the recessed concave surface (23), a through groove (31) corresponding to the threaded groove (3) and penetrating through the main shaft (1), and a screw (32) penetrating through the through groove (31) and adapted to the threaded groove (3).

7. The high-strength marine titanium alloy shaft with seawater corrosion prevention and non-electric leakage according to claim 6, characterized in that, A countersunk head (33) communicating with the through groove (31) is formed on the main shaft (1), and the countersunk head (33) is used for hiding the screw head of the screw (32).

8. The high-strength marine titanium alloy shaft with seawater corrosion prevention and non-electric leakage according to claim 1, characterized in that, Both the shaft body and the transmission part are made of titanium alloy, and corrosion-resistant layers are coated on the outer layers of the shaft body and the transmission part.

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