Fin stabilizer flap mounting process

Abstract

The invention discloses a fin stabilizer flap mounting process which is characterized in that a flap fin is mounted on a main fin through a connecting structure, and the fin stabilizer flap mounting process comprises the following steps: S1, a first front bearing pad is frozen and then mounted on a counter bore of a first hinge lug; s2, a second rear bearing pad is frozen and then installed on a counter bore of a third hinge lug; s3, a shaft sleeve is frozen and then installed in an inner hole of a second hinge lug, and a first rear bearing pad and a second front bearing pad are frozen and then installed in counter bores in the two ends of the second hinge lug; s4, trial assembly; s5, O-shaped sealing rings are installed on the second rear bearing pad and the first front bearing pad, and the flap shaft is installed in an inner hole of the first hinge lug, an inner hole of the shaft sleeve and an inner hole of the third hinge lug; the main fin is fixed by the fixing device, and meanwhile, the connecting structure is rotated, so that the flap fin rotates freely and flexibly without jamming. Installation steps are simplified, errors of production sizes of part of parts are increased, flap fin production efficiency is improved, the fin stabilizer production period is shortened, and enterprise production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of fin stabilizer manufacturing, and in particular to a fin stabilizer flap installation process. Background Art

[0002] With the continuous development of marine resources by humans, navigation technology is also constantly improving. When ships are sailing, they are affected by waves, sea breezes and currents, which will produce lateral swaying motion, thereby causing severe lateral swaying, reducing the seaworthiness and safety of the ship, and reducing the working and living environment of the crew on board. At present, in order to reduce the lateral sway of ships, the measures and methods widely used at home and abroad to reduce the lateral sway of ships include bilge keels, fin stabilizers, stabilizing tanks and rudder fin combined stabilization. Among them, fin stabilizers are considered to be the best stabilization device.

[0003] In the anti-rolling equipment, the retractable anti-rolling fins can be extended and retracted in the cabin to reduce the resistance of the ship's navigation. Among them, adding flap fins to the retractable anti-rolling fins can effectively increase the anti-rolling effect of the anti-rolling fins. At present, the installation process of flap fins is complicated, and the assembly precision between parts is high. After the flaps are installed, the axis of the flap fin and the main fin axis must be in the same horizontal plane and have coaxiality requirements to ensure that the rotation of the main shaft can drive the flaps to rotate without obstruction. If the installation is not in place, it is easy to cause errors, and the processes of assembly, disassembly, and rework will occur. In addition, disassembly and assembly are difficult, which wastes manpower and material resources and increases the production cost of the enterprise. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by this patent application is how to provide a fin stabilizer flap installation process to solve the problems that the flap fin installation process is complicated, the assembly precision between each component such as the sleeve and the load-bearing pad is high, the installation is not in place, it is easy to cause errors, and the processes of assembly, disassembly, and rework will occur. In addition, the assembly and disassembly are relatively difficult, which wastes manpower and material resources and increases the production cost of the enterprise.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A fin stabilizer flap installation process, wherein the flap fin is installed on a main fin through a connecting structure, wherein the connecting structure includes a first dumpling ear, a second dumpling ear, a third dumpling ear, a first front load-bearing pad, a first rear load-bearing pad, a shaft sleeve, a second front load-bearing pad, and a second rear load-bearing pad. The installation process includes the following steps:

[0007] S1: freeze the first front load-bearing pad and install it on the countersunk hole of the first hinge ear;

[0008] S2: freeze the second rear load-bearing pad and install it on the countersunk hole of the third hinge ear;

[0009] S3: installing the shaft sleeve into the inner hole of the second hinge ear after freezing, and installing the first rear load-bearing pad and the second front load-bearing pad on the countersunk holes at both ends of the second hinge ear after freezing;

[0010] S4: Trial assembly: install the flap shaft into the inner hole of the first dumpling ear, the inner hole of the shaft sleeve and the inner hole of the third dumpling ear, rotate the main fin, so that the flap shaft drives the flap fin to rotate, and check the rotation of the flap fin, which is required to rotate freely without blocking and flexible;

[0011] S5: Install the O-ring onto the second rear load-bearing pad and the first front load-bearing pad, and install the flap shaft into the inner hole of the first dumpling ear, the inner hole of the shaft sleeve and the inner hole of the third dumpling ear; fix the main fin with a fixing device, and rotate the connecting structure at the same time to make the flap fin rotate freely and flexibly without obstruction.

[0012] Among them, the freezing method adopts dry ice freezing.

[0013] Among them, the freezing time of the shaft sleeve is 30 minutes, and the freezing time of the first front load-bearing pad, the first rear load-bearing pad, the second front load-bearing pad and the second rear load-bearing pad is 50 minutes; after freezing, the outer circle dimensions of the shaft sleeve, the first front load-bearing pad, the first rear load-bearing pad, the second front load-bearing pad and the second rear load-bearing pad are measured, and the installation is carried out after checking that the outer circle shrinkage meets the installation requirements.

[0014] Wherein, a keyway is provided between the first dumpling ear and the flap shaft, and they are connected by a key.

[0015] Among them, the first dumpling ear and the third dumpling ear are connected to the longitudinal rib plate of the flap fin, and the second dumpling ear is connected to the longitudinal rib plate of the main fin.

[0016] In summary, compared with direct press-fitting, this fin stabilizer flap installation process is prone to problems such as component damage, large errors, and assembly difficulties. Liquid nitrogen freezing can easily cause the temperature to be too low, resulting in component cracking. Therefore, dry ice cold installation can better control the shrinkage of parts, ensure the accuracy requirements of the sleeves and load-bearing pads in the flap fins, simplify the installation steps of the flap fins, improve the production efficiency of the fin stabilizers, shorten the production cycle of the fin stabilizers, and reduce the production costs of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the three-dimensional overall structure diagram of the flap fin.

[0018] Figure 2 It is a cross-sectional installation diagram of the connecting mechanism. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "upper, lower" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the devices or components referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0020] like Figure 1-2 As shown, a fin stabilizer flap installation process, the flap fin 1 is installed on the main fin 3 through the connecting structure 2, the connecting structure 2 includes a first dumpling ear 208, a second dumpling ear 209, a third dumpling ear 2010, a first front load-bearing pad 201, a first rear load-bearing pad 202, a sleeve 203, a second front load-bearing pad 204 and a second rear load-bearing pad 205, and the installation process includes the following steps:

[0021] S1: freeze the first front load-bearing pad 201 and install it on the countersunk hole of the first hinge ear 208;

[0022] S2: After freezing, install the second rear load-bearing pad 206 on the countersunk hole of the third hinge ear 2010;

[0023] S3: The shaft sleeve 203 is installed in the inner hole of the second hinge ear 209 after being frozen, and the first rear load-bearing pad 202 and the second front load-bearing pad 204 are installed on the countersunk holes at both ends of the second hinge ear 209 after being frozen respectively;

[0024] S4: Trial assembly: install the flap shaft 207 into the inner hole of the first dumpling ear 208, the inner hole of the shaft sleeve 203 and the inner hole of the third dumpling ear 2010, rotate the main fin 3, so that the flap shaft 207 drives the flap fin 1 to rotate, and check the rotation of the flap fin 1, which is required to rotate freely without blocking and flexible;

[0025] S5: Install the O-ring 206 onto the second rear load-bearing pad 205 and the first front load-bearing pad 201, and install the flap shaft 207 into the inner hole of the first dumpling ear 208, the inner hole of the shaft sleeve 203 and the inner hole of the third dumpling ear 2010; fix the main fin 3 with a fixing device, and rotate the connecting structure 2 at the same time, so that the flap fin 1 can rotate freely and flexibly without obstruction.

[0026] During implementation, the freezing method is dry ice freezing. It can also be done through a freezing device (the temperature needs to be controlled to avoid insufficient shrinkage and installation difficulties due to insufficient temperature; too low temperature can easily cause cracks in the shaft sleeve and load-bearing pad (polymer composite material)).

[0027] During implementation, the freezing time of the shaft sleeve 203 is 30 minutes, and the freezing time of the first front load-bearing pad 201, the first rear load-bearing pad 202, the second front load-bearing pad 204 and the second rear load-bearing pad 205 is 50 minutes; after freezing, the outer circle dimensions of the shaft sleeve, the first front load-bearing pad, the first rear load-bearing pad, the second front load-bearing pad and the second rear load-bearing pad are measured, and the installation is carried out after checking that the outer circle shrinkage meets the installation requirements (ensuring that the gap with the hinge ear seat is 0.2-0.3mm).

[0028] During implementation, a keyway is provided between the first dumpling ear 208 and the flap shaft 207 and they are connected via a key.

[0029] During implementation, the first dumpling ear 208 and the third dumpling ear 2010 are connected to the longitudinal rib plate of the flap fin 1 , and the second dumpling ear 209 is connected to the longitudinal rib plate of the main fin 3 .

[0030] After installation, the shaft sleeve 203 is located between the first rear bearing pad 202 and the second front bearing pad 204. The first front bearing pad 201 is located between the first dumpling ear 208 and the first rear bearing pad 202, and the gap between the first rear bearing pad 202 is 0.6-1mm. The second rear bearing pad 205 is located between the third dumpling ear 2010 and between the second front bearing pad 204, and the gap between the second front bearing pad 204 is 0.6-1mm, so as to ensure that the second dumpling ear 209 can rotate freely around the flap shaft 207.

[0031] After installation, each part has an interference fit with the dumpling ears and a clearance fit with the flap shaft.

[0032] Finally, it should be noted that those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A fin stabilizer flap installation process, wherein the flap fin is installed on the main fin through a connecting structure, characterized in that: The connecting structure comprises a first dumpling ear, a second dumpling ear, a third dumpling ear, a first front load-bearing pad, a first rear load-bearing pad, a shaft sleeve, a second front load-bearing pad and a second rear load-bearing pad, and the installation process comprises the following steps: S1: freeze the first front load-bearing pad and install it on the countersunk hole of the first hinge ear; S2: freeze the second rear load-bearing pad and install it on the countersunk hole of the third hinge ear; S3: installing the shaft sleeve into the inner hole of the second hinge ear after freezing, and installing the first rear load-bearing pad and the second front load-bearing pad on the countersunk holes at both ends of the second hinge ear after freezing; S4: Trial assembly: install the flap shaft into the inner hole of the first dumpling ear, the inner hole of the shaft sleeve and the inner hole of the third dumpling ear, rotate the main fin, so that the flap shaft drives the flap fin to rotate, and check the rotation of the flap fin, which is required to rotate freely without blocking and flexible; S5: Install the O-ring onto the second rear load-bearing pad and the first front load-bearing pad, and install the flap shaft into the inner hole of the first dumpling ear, the inner hole of the shaft sleeve and the inner hole of the third dumpling ear; fix the main fin with a fixing device, and rotate the connecting structure at the same time to make the flap fin rotate freely and flexibly without obstruction.

2. A fin stabilizer flap installation process according to claim 1, characterized in that: The freezing method adopts dry ice freezing.

3. The fin stabilizer flap installation process according to claim 1, characterized in that: The freezing time of the shaft sleeve is 30 minutes, and the freezing time of the first front load-bearing pad, the first rear load-bearing pad, the second front load-bearing pad and the second rear load-bearing pad is 50 minutes; after freezing, the outer circle dimensions of the shaft sleeve, the first front load-bearing pad, the first rear load-bearing pad, the second front load-bearing pad and the second rear load-bearing pad are measured, and installation is carried out after checking that the outer circle shrinkage meets the installation requirements.

4. The fin stabilizer flap installation process according to claim 1, characterized in that: A keyway is provided between the first dumpling ear and the flap shaft, and the first dumpling ear and the flap shaft are connected by a key.

5. The fin stabilizer flap installation process according to claim 1, characterized in that: The first dumpling ear and the third dumpling ear are connected to the longitudinal rib plate of the flap fin, and the second dumpling ear is connected to the longitudinal rib plate of the main fin.

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