Marine stabilizing rudder capable of preventing rudder blade from shaking and mounting method

Abstract

The invention provides a marine stabilizing rudder capable of preventing rudder blade shaking and an installation method.The rudder blade of a rudder system structure is internally provided with a rudder hole with an upward opening, the bottom of the rudder hole is downwards connected with a rudder button, the lower end of a rudder stock penetrates through the rudder hole and is fixedly connected with the rudder button, and a rudder tube lower forge piece is inserted into a gap between the rudder stock and the side wall of the rudder hole; a rudder tube bush is clamped between the lower end of the rudder tube lower forge piece and the rudder stock, a check ring bearing is clamped between the upper end of the rudder hole and the rudder tube lower forge piece, and the check ring bearing and the rudder tube bush play a dual-sealing role, prevent seawater from entering the rudder hole and the rudder tube, play a limiting role and prevent the rudder tube and the rudder stock from shaking up and down in the operation process. The stability is improved. By using the stable structure, seawater can be effectively prevented from entering the internal structure of the rudder blade, and dual protection is formed for the rudderstock, the rudder knob and the rudder barrel bushing. Meanwhile, the rudder blade can be well installed and fixed and is prevented from shaking, the safety and efficiency of a ship are guaranteed, and the stability of the ship is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ship design and manufacturing, and in particular to a ship-used stabilizing rudder for preventing rudder blades from shaking and an installation method thereof. Background Art

[0002] With the increasing requirements for energy conservation and environmental protection of ships, shipowners and charterers are paying more and more attention to maximizing the efficiency and fuel economy of ships. The introduction of a series of energy-saving devices enables shipowners and operators to meet IMO emission requirements while significantly reducing their operating and maintenance costs. Among them, the rudder system is the top priority for ship energy conservation and emission reduction. As one of the important performances of a ship, operability includes two interrelated performances, namely, heading stability and turning performance.

[0003] In practice, the stability of the rudder blade is crucial to the performance and safety of the ship. The shaking rudder blade will affect the stability and streamline of the ship, thereby reducing the sailing speed; the shaking rudder blade will cause the ship to sway, causing the cargo to move in the cabin and cause cargo damage; the continuous shaking of the rudder blade will cause wear and tear on the hull structure and mechanical equipment, damage the hull and mechanical equipment, and shorten the service life; the shaking rudder blade will increase the swaying of the ship, causing seasickness for the crew and passengers, affecting normal work and life. Therefore, the shaking of the ship is a harmful performance problem, and it is necessary to design a stable rudder to prevent the shaking of the rudder blade, ensure the safety and efficiency of the ship, and improve the stability of the ship. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a marine stabilizing rudder and an installation method for preventing the rudder blade from shaking, which can not only ensure the technical safety between the rudder blade and the hull structure, but also overcome the above-mentioned industry status quo.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a ship stabilizing rudder for preventing a rudder blade from shaking, the ship stabilizing rudder comprising a rudder blade, a rudder hole with an upward opening is provided inside the rudder blade, a rudder button is connected downwardly to the bottom of the rudder hole, the rudder button is fixedly connected to the rudder blade, an operating cavity is connected downwardly to the rudder button, the lower end of a rudder bar passes through the rudder hole and the rudder button in sequence to reach the operating cavity, and the rudder bar is fixedly connected to the rudder button;

[0006] The upper end of the rudder stock passes upward through the rudder barrel located at the stern of the hull to reach the ship's cabin, and the lower end of the rudder barrel is downwardly connected to a rudder barrel lower forging, which is inserted into the gap between the rudder stock and the side wall of the rudder hole, and a rudder barrel bushing is sandwiched between the lower end of the rudder barrel lower forging and the rudder stock, and the lower edge of the rudder barrel bushing is fitted with a horizontally arranged rudder barrel pressure ring, which is sleeved on the outer wall surface of the rudder stock, and the rudder barrel pressure ring is also fitted and connected to the lower edge of the rudder barrel lower forging by vertically upward bolts.

[0007] Optionally, a stop ring bearing and a stop ring bushing are sandwiched between the upper end of the rudder hole and the lower forging of the rudder barrel, the stop ring bearing is welded and fixed to the rudder hole, and the stop ring bushing is located between the stop ring bearing and the lower forging of the rudder barrel.

[0008] Optionally, an upper edge of the stop ring bushing is lower than an upper edge of the stop ring bearing to form an annular groove opening upward.

[0009] Optionally, a mechanical seal assembly is provided in the annular groove, and the mechanical seal assembly includes a stopping seal ring, a stopping lubricating oil ring and a stopping pressure ring.

[0010] Optionally, multiple stopping sealing rings are arranged in the up-down direction and filled into the annular groove, the stopping lubricating oil ring is installed between the stopping sealing ring located at the top and the stopping sealing ring adjacent to the bottom, the opening of the annular groove is covered by the stopping pressure ring, the stopping pressure ring is sleeved on the outer wall surface of the lower forging of the rudder barrel, the stopping pressure ring is sealingly fitted with the stopping sealing ring located at the top, and the stopping pressure ring is also fitted and connected to the upper edge of the stopping ring bearing by vertically downward bolts.

[0011] Optionally, the contact surface between the rudder bar and the rudder button is a conical surface that gradually converges inward from top to bottom; the rudder bar and the lower end portion located in the operating cavity are equipped with a hydraulic nut, and the upper end surface of the hydraulic nut is pressed against the lower end surface of the rudder button to clamp the rudder bar.

[0012] Optionally, the portion of the rudder stock located in the ship cabin is connected to the rudder bearing via a mechanical seal, and a tiller handle is provided at the upper end of the rudder stock.

[0013] Optionally, the rudder blade has a rudder ball, which is coaxially arranged behind the propeller.

[0014] The present invention also provides a method for installing the marine stabilizing rudder, comprising the following steps:

[0015] S1: Pull the wire and illuminate it, and the installation of the rudder tube is completed before the wire is illuminated;

[0016] S2: Use the total station to find the center points A and B at the upper and lower ends of the rudder tube respectively, connect the AB line and extend it to the height of the main engine shaft centerline, and intersect the horizontal plane where the shaft centerline is located at point C. The ABC line is the rudder centerline;

[0017] S3: Preparation before installing the rudder blade, ensure that the lighting and pulling wire are qualified; before installing the rudder blade, the stop pressure ring, the stop lubricating oil ring, the stop sealing ring and the stop ring bushing are installed to the specified position of the rudder barrel; the rudder blade and the rudder stock are kept at the same temperature during the press-fitting process;

[0018] S4: Align the zero position of the rudder blade and the rudder stock. Mark the side of the rudder blade, the rudder stock sleeve and the upper surface of the rudder blade forging respectively. Move the rudder blade under the rudder stock to ensure that the zero position marks of the rudder blade and the rudder stock are aligned. Check the O-ring on the contact surface between the rudder stock and the rudder blade.

[0019] S5: Raise the rudder blade. During the process, check that the contact surface between the rudder stock and the rudder blade is clean. Raise the rudder blade until it touches the rudder stock. Confirm that the O-ring in the rudder knob is still in place and has not fallen off. Manually tighten the hydraulic nut until it touches the rudder knob. Check and clean the hydraulic oil circuit interface. Connect the manual pump and use the hydraulic pump to install the hydraulic nut in place.

[0020] S6: After removing the connection, remove the hydraulic pump, tighten the hydraulic nut, and after the excess hydraulic oil flows out of the rudder knob, seal the hydraulic oil circuit with the drain plug, install the hydraulic nut stopper and weld it in place.

[0021] Optionally, the method further includes the following steps:

[0022] S7: Install the stop ring bushing and the stop ring bearing in place, then install the stop seal ring, then install the stop lubricating oil ring, install another stop seal ring outside the lubricating oil ring, and finally install the stop pressure ring, which is fixed to the upper edge of the stop ring bearing with bolts;

[0023] After the installation of the retaining ring and retaining ring bearing fixing bolts, use stainless steel wire to connect them on the screw head end by spot welding to prevent the bolts from loosening;

[0024] S8: After the construction is completed, clean up the internal garbage and tools, and then paint according to the painting requirements; weld the rudder blade sealing plate and inspect it, repair the surface with paint, ensure that all drain plugs are not loose, and the rudder blade installation is completed.

[0025] As described above, the present invention provides a marine stabilizing rudder and an installation method for preventing the rudder blade from shaking. The rudder blade of the rudder system structure is provided with a rudder hole with an opening facing upward inside, the bottom of the rudder hole is downwardly connected to a rudder button, the lower end of the rudder shaft passes through the rudder hole and is fixedly connected to the rudder button, the lower forging of the rudder barrel is inserted into the gap between the rudder shaft and the side wall of the rudder hole, a rudder barrel bushing is sandwiched between the lower end of the rudder barrel lower forging and the rudder shaft, a stop ring bearing is sandwiched between the upper end of the rudder hole and the lower forging of the rudder barrel, the stop ring bearing and the rudder barrel bushing play a double sealing role to prevent seawater from entering the rudder hole and the rudder barrel, and at the same time play a limiting role to prevent the rudder barrel and the rudder shaft from shaking up and down during operation, thereby improving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a cross-sectional schematic diagram of the rudder system structure in Embodiment 1 of the present invention.

[0027] Figure 2 Shown is a partially enlarged schematic diagram of the rudder blade in the first embodiment of the present invention.

[0028] Figure 3 It is a partially enlarged schematic diagram of the stop ring in the first embodiment of the present invention.

[0029] Component number description

[0030] 1. Hull; 2. Propeller; 3. Rudder blade; 4. Tiller; 5. Rudder bearing; 6. Rudder barrel; 7. Rudder stock; 8. Stop pressure ring; 9. Stop lubricating oil ring; 10. Stop sealing ring; 11. Stop ring bearing; 12. Stop bushing; 13. Rudder barrel lower forging; 14. Rudder barrel bushing; 15. Rudder barrel pressure ring; 16. Rudder knob; 17. Hydraulic nut. DETAILED DESCRIPTION

[0031] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0032] For example, when describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional view showing the device structure will not be partially enlarged according to the general scale, and the schematic view is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional space dimensions of length, width and depth should be included.

[0033] For ease of description, spatial relational terms such as "under", "below", "below", "below", "above", "on", etc. may be used herein to describe the relationship of one element or feature shown in the drawings to other elements or features. It will be understood that these spatial relational terms are intended to include other directions of the device in use or operation in addition to the directions depicted in the drawings. In addition, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or there can be one or more intervening layers. As used herein, "between..." means including the end point values.

[0034] In the context of the present application, a structure in which a first feature is described as being "above" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features, such that the first and second features may not be in direct contact.

[0035] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner, and therefore the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0036] Embodiment 1

[0037] like Figures 1 to 3 As shown, this embodiment provides a ship stabilizing rudder for preventing rudder blades from shaking, comprising:

[0038] The rudder blade 3 is provided with a rudder hole with an upward opening inside, and the rudder hole is a cylindrical groove with an upward opening. The bottom of the rudder hole is connected downwardly with a rudder button 16, and the rudder button 16 is fixedly connected to the rudder blade 3. The rudder button 16 is connected downwardly with an operating cavity. The lower end of the rudder bar 7 passes through the rudder hole and the rudder button 16 in sequence to reach the operating cavity. The rudder bar 7 and the rudder button 16 are fixedly connected by a tapered hole press-in method, that is, the contact surface between the rudder bar 7 and the rudder button 16 is a tapered surface that gradually converges inward from top to bottom. The lower end of the rudder bar 7 located in the operating cavity is equipped with a hydraulic nut 17, and the upper end surface of the hydraulic nut 17 is pressed against the lower end surface of the rudder button 16 to clamp the rudder bar 7.

[0039] The upper end of the rudder stock 7 passes upward through the rudder tube 6 located at the stern of the hull 1 to reach the ship cabin. The part of the rudder stock 7 located in the ship cabin is connected to the rudder bearing 5 through a mechanical seal, and the upper end of the rudder stock 7 is provided with a tiller 4. The steering gear located in the ship cabin drives the rudder stock 7 to rotate by driving the tiller 4, and then drives the rudder blade 3 to rotate, so as to achieve the purpose of adjusting the hull attitude.

[0040] Furthermore, the lower end of the rudder barrel 6 is downwardly connected to a rudder barrel lower forging 13, and the rudder barrel lower forging 13 is inserted into the gap between the rudder stock 7 and the side wall of the rudder hole.

[0041] A rudder barrel bushing 14 is sandwiched between the lower end of the rudder barrel lower forging 13 and the rudder stock 7. A horizontally arranged rudder barrel pressure ring 15 is fitted on the lower edge of the rudder barrel bushing 14. The rudder barrel pressure ring 15 is sleeved on the outer wall surface of the rudder stock 7, and the rudder barrel pressure ring 15 is also fitted and connected to the lower edge of the rudder barrel lower forging 13 by vertically upward bolts.

[0042] Furthermore, a stop ring bearing 11 and a stop ring bushing 12 are sandwiched between the upper end of the rudder hole and the lower forging 13 of the rudder barrel. The stop ring bearing 11 is welded and fixed to the rudder hole. The stop ring bushing 12 is located between the stop ring bearing 11 and the lower forging 13 of the rudder barrel, and the upper edge of the stop ring bushing 12 is lower than the upper edge of the stop ring bearing 11 to form an annular groove with an opening facing upward. The gap between the rudder hole and the lower forging of the rudder barrel is sealed by the stop ring bearing 11 and the stop ring bushing 12 to prevent seawater from entering.

[0043] A mechanical seal assembly is provided in the annular groove, and the mechanical seal assembly consists of a stop seal ring 10, a stop lubricating oil ring 9 and a stop pressure ring 8. The stop ring bearing 11 is limited by the mechanical seal assembly to prevent the bearing from moving during operation and causing the rudder blade to shake.

[0044] A plurality of stop sealing rings 10 are arranged in the up-down direction and filled into the annular groove. In the present embodiment, there are three stop sealing rings 10. A stop lubricating oil ring 9 is installed between the top stop sealing ring 10 and the adjacent stop sealing ring 10 below. The opening of the annular groove is sealed by a stop pressure ring 8. The stop pressure ring 8 is sleeved on the outer wall surface of the lower forging 13 of the rudder barrel. The stop pressure ring 8 is sealed and fitted with the top stop sealing ring 10. The stop pressure ring 8 is also fitted and connected with the upper edge of the stop ring bearing 11 by vertically downward bolts.

[0045] The inner cavity of the stop ring bearing 11 is provided with an injection channel, one end of the injection channel is opened at the upper edge of the stop ring bearing 11 and is equipped with a bolt cover, and the other end of the injection channel is connected to the stop lubricating oil ring 9.

[0046] The steering gear located in the ship's cabin drives the rudder bar 7 to rotate by driving the tiller handle 4, and the rudder bar 7 drives the rudder knob 16 and the rudder blade 3 to rotate synchronously, so as to achieve the purpose of adjusting the hull posture; during the process, the rudder barrel 6 and the rudder barrel lower forging 13 remain stationary, and the retaining ring bearing 11 and the rudder barrel bushing 14 play a role of connection and transition, and also play a sealing role to prevent seawater from entering the rudder hole and the rudder barrel.

[0047] Furthermore, the rudder blade 3 is arranged on the propeller. The rudder blade structure can be a flat rudder, a twisted rudder, a flap rudder, etc. The rudder blade 3 can have a rudder ball, and the rudder ball is coaxially arranged behind the propeller 2.

[0048] Embodiment 2

[0049] Based on the stabilizing rudder structure in the first embodiment, this embodiment provides a method for installing a stabilizing rudder, comprising the following steps:

[0050] S1: Pull the wire and illuminate it. Before pulling the wire and illuminating it, the installation of the rudder tube is completed. The welding of the hull structure from the front wall of the engine room to the rear and below the main deck is all completed. The inspection of the structure below the steering gear platform and the pyrotechnic correction work is completed. The double bottom tightness test of the above-mentioned area is completed, including the tightness test of the stern tank and the stern tube cooling water tank. The arrangement of the slats meets the requirements of the drawings. All temporary supports and braces in the above-mentioned areas are removed to confirm that the baseline of the hull meets the tolerance standard requirements. The inspection results are submitted to the shipowner for ship inspection confirmation.

[0051] All temporary supports in the adjacent area must be removed, and interfering operations such as vibration and grinding should be stopped. The hull should not be exposed to the sun and the temperature should not change dramatically to avoid hull deformation affecting the correctness of the rudder system centerline. The shaft rudder system should be illuminated at the same time.

[0052] S2: Use a total station to find the center points A and B at the upper and lower ends of the rudder tube respectively, connect the line AB and extend it to the height of the center line of the main engine shaft system, and intersect the horizontal plane where the center line of the main engine shaft system is located at point C. The line connecting the three points ABC is the center line of the rudder system.

[0053] The verticality of the rudder barrel is measured and calculated using a laser theodolite, and the verticality is ≤1mm / m. A steel wire is pulled to measure the intersection of the shaft system and the rudder system, and the intersection meets the following requirements: standard ≤4mm, limit ≤8mm.

[0054] S3: Preparation work before installing the rudder blade. The rudder blade can be installed only after the lighting and wire drawing are qualified. Before installing the rudder blade, the stop pressure ring, stop lubricating oil ring, stop sealing ring and stop ring bushing are installed to the specified position of the rudder barrel.

[0055] The rudder blade and rudder stock need to be kept at the same temperature during the press-fitting process. The rudder blade forging cannot be heated during installation and removal.

[0056] S4: The rudder blade and the rudder stock are aligned at zero position. Marks are made on the side of the rudder blade, the rudder stock sleeve and the upper surface of the rudder blade forging. When the rudder stock is lowered, the two marks should be aligned and placed at zero position. After the press fitting is completed, the mark should be painted with eye-catching paint as a basis for waterline inspection.

[0057] Before press-fitting the rudder blade and rudder stock, make sure that the surface of the rudder blade cone and the rudder stock cone are clean, check all O-rings, and replace them if they are damaged. The O-rings can be coated with glue to prevent them from slipping during installation.

[0058] Lubricate the cone surface with clean hydraulic oil for hydraulic pumps, not grease.

[0059] Move the rudder blade under the rudder stock and make sure the zero marks of the rudder blade and rudder stock are aligned.

[0060] S5: Raise the rudder blade, check the cone surface during the process and keep it clean. Continue to raise the rudder blade until it touches the rudder stock, and confirm that the O-ring in the rudder knob is still in place and has not fallen off.

[0061] Manually tighten the hydraulic nut as far as possible until it contacts the rudder knob, the hydraulic piston must be fully retracted, then lower and remove the installation tool. Check and clean the hydraulic oil line interface and connect the manual pump.

[0062] According to the calculated insertion data and the pushing pressure of the rudder blade, determine the pushing amount and pushing pressure. Pressurize the hydraulic pump to 10% of the pushing pressure, adjust the dial gauge to zero, wait for 5 to 10 minutes, and continue to pressurize the axial direction to lift the rudder blade until the dial gauge shows a difference of 2mm. Alternately pressurize the axial and radial directions, and record the pushing amount every time it increases by 1mm until the pushing amount reaches the calculated requirement.

[0063] During the process of pressing, the first amount of pressing shall prevail. In any case, the pushing pressure shall not be greater than the calculated allowable pushing pressure. Step 16: After reaching the maximum amount of pressing, the radial hydraulic pump is depressurized, and the radial hydraulic pump is removed after the connection is removed. After the excess hydraulic oil flows out of the rudder knob, the hydraulic oil circuit is closed with a drain plug.

[0064] Wait for about 60 minutes, and keep the axial hydraulic pump still during the waiting process. Then release the pressure of the axial hydraulic pump. During this period, the reading of the micrometer is allowed to float 1 / 100mm (usually not more than 0.1mm) due to thread shrinkage. Record the final pressing amount and pushing pressure.

[0065] S6: Remove the axial hydraulic pump after removing the connection. Tighten the hydraulic nut, and after the excess hydraulic oil flows out of the rudder knob, seal the hydraulic oil circuit with the drain plug. Install the hydraulic nut stopper and weld it in place.

[0066] S7: Install the snap ring bushing and snap ring bearing in place, then install the snap seal ring, then install the snap oil ring, install another snap seal ring outside the lubricating oil ring, and finally install the snap pressure ring. The snap pressure ring is bolted to the upper edge of the snap ring bearing.

[0067] After the fixing bolts of the retaining ring and retaining ring bearing are installed, they are connected in series on the screw head end using φ4mm stainless steel wire by spot welding to prevent loosening between the bolts.

[0068] S8: After the construction is completed, clean up the internal garbage and tools, and then paint according to the painting requirements. Weld the rudder blade cover. Strictly install the welding process and perform 100UT inspection after welding.

[0069] Remove all tooling, repair the surface paint, and check whether all drain plugs are loose. The rudder blade installation is completed.

[0070] In summary, the present invention provides a marine stabilizing rudder and an installation method for preventing the rudder blade from shaking. The rudder blade of the rudder system structure is provided with a rudder hole with an opening facing upward, the bottom of the rudder hole is downwardly connected with a rudder button, the lower end of the rudder shaft passes through the rudder hole and is fixedly connected to the rudder button, the lower forging of the rudder barrel is inserted into the gap between the rudder shaft and the side wall of the rudder hole, a rudder barrel bushing is sandwiched between the lower end of the rudder barrel lower forging and the rudder shaft, a stop ring bearing is sandwiched between the upper end of the rudder hole and the lower forging of the rudder barrel, the stop ring bearing and the rudder barrel bushing play a double sealing role to prevent seawater from entering the rudder hole and the rudder barrel, and also play a limiting role to prevent the rudder barrel and the rudder shaft from shaking up and down during operation, thereby improving stability.

[0071] By using this stable structure, seawater can be effectively prevented from entering the internal structure of the rudder blade, forming a double protection for the rudder stock, rudder knob, and rudder barrel bushing. At the same time, the rudder blade can be installed and fixed well to prevent the rudder blade from shaking. The stop ring bearing, the lower forging of the rudder barrel, and the rudder knob firmly fix the rudder blade in a straight line, eliminating the swing frame, preventing the rudder blade from jumping up and down and swaying back and forth and left and right, and preventing the rudder blade from shaking, ensuring the safety and efficiency of the ship and improving the stability of the ship.

[0072] In addition, the provided installation method can effectively guide the installation of ship stabilizing rudders, improve the installation quality of the rudder system, and improve the installation efficiency of the rudder system. Through the use of stabilizing rudders, the maneuverability of the ship's rudder is greatly improved, and the stability of the ship is improved, which is of great significance in engineering projects.

[0073] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A ship stabilizing rudder for preventing rudder blades from shaking, characterized in that: The ship stabilizing rudder comprises a rudder blade, wherein a rudder hole with an upward opening is provided inside the rudder blade, a rudder button is connected downwardly to the bottom of the rudder hole, the rudder button is fixedly connected to the rudder blade, an operating cavity is connected downwardly to the rudder button, and the lower end of the rudder stock passes through the rudder hole and the rudder button in sequence to reach the operating cavity, and the rudder stock is fixedly connected to the rudder button; The upper end of the rudder stock passes upward through the rudder barrel located at the stern of the hull to reach the ship's cabin, and the lower end of the rudder barrel is downwardly connected to a rudder barrel lower forging, which is inserted into the gap between the rudder stock and the side wall of the rudder hole, and a rudder barrel bushing is sandwiched between the lower end of the rudder barrel lower forging and the rudder stock, and the lower edge of the rudder barrel bushing is fitted with a horizontally arranged rudder barrel pressure ring, which is sleeved on the outer wall surface of the rudder stock, and the rudder barrel pressure ring is also fitted and connected to the lower edge of the rudder barrel lower forging by vertically upward bolts.

2. The ship stabilizing rudder for preventing rudder blade from shaking according to claim 1, characterized in that: A stop ring bearing and a stop ring bushing are sandwiched between the upper end of the rudder hole and the lower forging of the rudder barrel. The stop ring bearing is welded and fixed to the rudder hole, and the stop ring bushing is located between the stop ring bearing and the lower forging of the rudder barrel.

3. The ship stabilizing rudder for preventing rudder blade from shaking according to claim 2, characterized in that: The upper edge of the stop ring bushing is lower than the upper edge of the stop ring bearing to form an annular groove opening upward.

4. The ship stabilizing rudder for preventing rudder blade from shaking according to claim 3, characterized in that: A mechanical seal assembly is arranged in the annular groove, and the mechanical seal assembly comprises a stop seal ring, a stop lubricating oil ring and a stop pressure ring.

5. The ship stabilizing rudder for preventing rudder blade from shaking according to claim 4, characterized in that: A plurality of stop sealing rings are arranged in the up-down direction and filled into the annular groove, the stop lubricating oil ring is installed between the stop sealing ring located at the top and the stop sealing ring adjacent to the bottom, the opening of the annular groove is covered by the stop pressure ring, the stop pressure ring is sleeved on the outer wall surface of the lower forging of the rudder barrel, the stop pressure ring is sealingly fitted with the stop sealing ring located at the top, and the stop pressure ring is also fitted and connected to the upper edge of the stop ring bearing by vertically downward bolts.

6. The ship stabilizing rudder for preventing rudder blade from shaking according to claim 5, characterized in that: The contact surface between the rudder bar and the rudder button is a conical surface which gradually converges inward from top to bottom; the rudder bar and the lower end portion located in the operating cavity are equipped with a hydraulic nut, and the upper end surface of the hydraulic nut is pressed against the lower end surface of the rudder button to clamp the rudder bar.

7. The ship stabilizing rudder for preventing rudder blade from shaking according to claim 1, characterized in that: The part of the rudder stock located in the ship cabin is connected with the rudder bearing through a mechanical seal, and a tiller handle is arranged at the upper end of the rudder stock.

8. The ship stabilizing rudder for preventing rudder blade from shaking according to claim 1, characterized in that: The rudder blade has a rudder ball, and the rudder ball is coaxially arranged behind the propeller.

9. A method for installing a marine stabilizing rudder according to any one of claims 6 to 8, characterized in that: The steps include: S1: Pull the wire and illuminate it, and the installation of the rudder tube is completed before the wire is illuminated; S2: Use the total station to find the center points A and B at the upper and lower ends of the rudder tube respectively, connect the AB line and extend it to the height of the main engine shaft centerline, and intersect the horizontal plane where the shaft centerline is located at point C. The ABC line is the rudder centerline; S3: Preparation before installing the rudder blade, ensure that the lighting and pulling wire are qualified; before installing the rudder blade, the stop pressure ring, the stop lubricating oil ring, the stop sealing ring and the stop ring bushing are installed to the specified position of the rudder barrel; the rudder blade and the rudder stock are kept at the same temperature during the press-fitting process; S4: Align the zero position of the rudder blade and the rudder stock. Mark the side of the rudder blade, the rudder stock sleeve and the upper surface of the rudder blade forging respectively. Move the rudder blade under the rudder stock to ensure that the zero position marks of the rudder blade and the rudder stock are aligned. Check the O-ring on the contact surface between the rudder stock and the rudder blade. S5: Raise the rudder blade. During the process, check that the contact surface between the rudder stock and the rudder blade is clean. Raise the rudder blade until it touches the rudder stock. Confirm that the O-ring in the rudder knob is still in place and has not fallen off. Manually tighten the hydraulic nut until it touches the rudder knob. Check and clean the hydraulic oil circuit interface. Connect the manual pump and use the hydraulic pump to install the hydraulic nut in place. S6: After removing the connection, remove the hydraulic pump, tighten the hydraulic nut, and after the excess hydraulic oil flows out of the rudder knob, seal the hydraulic oil circuit with the drain plug, install the hydraulic nut stopper and weld it in place.

10. The installation method according to claim 9, characterized in that: The following steps are also included: S7: Install the stop ring bushing and the stop ring bearing in place, then install the stop seal ring, then install the stop lubricating oil ring, install another stop seal ring outside the lubricating oil ring, and finally install the stop pressure ring, which is fixed to the upper edge of the stop ring bearing with bolts; After the installation of the retaining ring and retaining ring bearing fixing bolts, use stainless steel wire to connect them on the screw head end by spot welding to prevent the bolts from loosening; S8: After the construction is completed, clean up the internal garbage and tools, and then paint according to the painting requirements; weld the rudder blade sealing plate and inspect it, repair the surface with paint, ensure that all drain plugs are not loose, and the rudder blade installation is completed.

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