Gravity oil tank of ship propeller

Abstract

The gravity oil tank comprises a propeller oil tank body, an oil tank cabinet is fixedly installed on one side of the propeller oil tank body, an oil seal cover is connected to the upper surface of the oil tank cabinet in a penetrating mode, and the bottom end of the oil seal cover is in threaded connection with a base. A sealing baffle ring is arranged on the side, close to the through hole, of the lower surface of the base, excessive oil liquid can be prevented from splashing disorderly through the oil baffle ring, the oil liquid is guided to an area needing key lubrication in a centralized mode, and the oil liquid is guided by the oil baffle ring to be evenly lubricated. The oil flows into the oil discharge plate, so that the oil can stay for a short time in the oil discharge plate, and heavy impurity particles can be gradually precipitated to the bottom of the concave cavity under the action of gravity, so that the used oil is primarily purified and recycled, the oil waste is reduced, and pollutants are prevented from being cyclically accumulated in the propeller; the cleanliness of oil in the lubricating system is guaranteed, the service life of each part of the propeller is prolonged, and stable operation of the propeller is further guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of ship component technology, specifically to the gravity oil tank of a ship propeller. Background Technology

[0002] With the development of the shipping industry, ships are becoming larger and more complex, placing higher demands on the reliability, stability, and efficiency of propulsion systems. As an important auxiliary device in the propulsion system, the gravity oil tank for ship propulsion is playing an increasingly prominent role. For example, large container ships and cruise ships require more powerful and stable propulsion power, and the gravity oil tank provides a stable oil supply to the propulsion lubrication and hydraulic systems, ensuring that the propulsion operates normally under various conditions.

[0003] Specialized vessels, such as marine engineering vessels and icebreakers, need to operate in complex and harsh marine environments, placing extremely high demands on the performance and adaptability of their propulsion systems. Gravity oil tanks can provide the propulsion system with appropriate oil pressure and flow rate according to different operating conditions and environmental conditions, ensuring the reliability and safety of the propulsion system.

[0004] The oil pressure provided by existing gravity oil tanks is not completely stable in actual operation and there are certain pressure fluctuations. These fluctuations will interfere with the stable working environment that the rotary seal should have, increasing the risk of lubricating oil leaking into seawater. Once the lubricating oil leaks, it will not only pollute the marine ecological environment and violate strict environmental protection regulations, but also increase operating costs due to lubricating oil consumption, and may further aggravate the risk of seawater backflow due to the decline in sealing performance.

[0005] Therefore, this utility model provides a gravity oil tank for ship propellers to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This utility model provides a gravity oil tank for a ship propeller, aiming to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: It includes a propeller oil tank body, an oil tank cabinet fixedly installed on one side of the propeller oil tank body, an oil seal cover penetrating the upper surface of the oil tank cabinet, a base threadedly connected to the bottom end of the oil seal cover, a through hole on the upper surface of the base, the through hole being threadedly connected to the oil seal cover, a sealing ring on the lower surface of the base near the through hole, an extension end on one side of the sealing ring, an umbrella-shaped seal fixedly installed at the edge of the lower surface of the base by bolts, one end of the umbrella-shaped seal being an flared opening, an oil baffle end cap movably sleeved on the inner top wall of the oil tank cabinet near the oil seal cover, the inner arc surface of the oil baffle end cap being a hollow structure, a bent surface on the lower surface of the oil baffle end cap, and a pressure plate sleeved on the inner bottom wall of the oil baffle end cap.

[0010] As a preferred technical solution of this application, the upper surface of the pressure plate is provided with an outward protrusion, the top outward protrusion of the pressure plate is movably engaged with an oil baffle ring, the lower surface of the oil baffle ring is provided with an annular cavity, and the top end of the outward protrusion is movably engaged with the annular cavity.

[0011] As a preferred technical solution of this application, the inner arc surface of the oil baffle ring is provided with an oil drain plate, the oil baffle ring and the through hole of the umbrella-shaped seal at the top are in the same plane, and the outer arc surface of the convex end is movably sleeved with the inner arc surface of the umbrella-shaped seal.

[0012] As a preferred technical solution of this application, the oil baffle ring is tightly fitted into the inner arc surface of the umbrella-shaped seal, and the top of the outer arc surface of the umbrella-shaped seal is provided with an annular sealing ring, the inner arc surface of the annular sealing ring being movably fitted with the umbrella-shaped seal.

[0013] As a preferred technical solution of this application, the annular sealing ring is placed on the top of the pressure plate, and locking bolts are connected through the annular sealing ring and the surface of the pressure plate.

[0014] As a preferred technical solution of this application, one end of the locking bolt extends through to the top of the annular sealing ring, and a tightening nut is threadedly connected to the top of the annular sealing ring through the locking bolt. A spring is sleeved on the outer arc surface of the locking bolt, one end of the spring abuts against the lower surface of the annular sealing ring, and the other end of the spring abuts against the surface of the pressure plate.

[0015] (III) Beneficial Effects

[0016] 1. The oil baffle end cap and sealing ring opening face the oil source inside the thruster, and the tip points to the external environment where impurities may enter, effectively blocking external impurity particles, such as dust and seawater droplets, to prevent them from entering the thruster and contaminating the oil, and avoiding the risk of seawater backflow caused by a decrease in sealing performance.

[0017] 2. The oil baffle ring prevents excessive oil from splashing haphazardly, directing the oil to areas requiring focused lubrication. Guided by the oil baffle ring, the oil flows into the drain plate, allowing it to remain there briefly. Gravity causes heavier impurities to settle to the bottom of the cavity, achieving initial purification and recycling of the used oil. This reduces oil waste, prevents contaminants from accumulating inside the thruster, ensures the cleanliness of the lubrication system, extends the service life of thruster components, and further guarantees the stable operation of the thruster. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall side view of the gravity oil tank of a ship's propeller;

[0019] Figure 2 A schematic diagram of the top structure of the oil tank in the gravity oil tank of a ship's propeller;

[0020] Figure 3 A schematic diagram of the oil seal cover structure for the gravity oil tank of a ship's propeller;

[0021] Figure 4 A schematic diagram of the internal structure of the oil baffle end cap of the gravity oil tank of a ship's propeller;

[0022] Figure 5 Gravity oil tank for ship propulsion Figure 1 A magnified structural diagram of point A in the middle.

[0023] In the picture:

[0024] 1. Propeller oil tank body; 2. Oil tank cabinet; 3. Oil seal cover; 4. Base; 5. Sealing retainer ring; 6. Umbrella-shaped seal; 7. Oil baffle end cover; 701. Bent surface; 8. Pressure plate; 801. Outward protruding end; 9. Oil baffle ring; 901. Annular cavity; 902. Oil drain plate; 10. Annular sealing ring; 11. Locking bolt; 12. Tightening nut; 13. Spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides a gravity oil tank for a ship's propeller, such as Figures 1 to 5As shown, the device includes a propeller oil tank body 1, an oil tank cabinet 2 fixedly installed on one side of the propeller oil tank body 1, an oil seal cover 3 penetrating the upper surface of the oil tank cabinet 2, a base 4 threadedly connected to the bottom end of the oil seal cover 3, a through hole on the upper surface of the base 4, and a sealing ring 5 on the lower surface of the base 4 near the through hole, with an extension end on one side of the sealing ring 5, and an umbrella-shaped seal 6 fixedly installed at the edge of the lower surface of the base 4 by bolts, one end of the umbrella-shaped seal 6 being an flared opening, and an oil baffle end cover 7 movably sleeved on the inner top wall of the oil tank cabinet 2 near the oil seal cover 3, the inner arc surface of the oil baffle end cover 7 being a hollow structure, and a bent surface 70 on the lower surface of the oil baffle end cover 7. 1. A pressure plate 8 is fitted onto the inner bottom wall of the oil baffle end cap 7. The upper surface of the pressure plate 8 is provided with an outwardly protruding end 801. The top of the pressure plate 8 is movably engaged with the oil baffle ring 9. The lower surface of the oil baffle ring 9 is provided with an annular cavity 901. The top of the outwardly protruding end 801 is movably engaged with the annular cavity 901. The inner arc surface of the oil baffle ring 9 is provided with an oil drain plate 902. The oil baffle ring 9 and the through hole of the top umbrella-shaped seal 6 are in the same plane. The outer arc surface of the outwardly protruding end 801 is movably engaged with the inner arc surface of the umbrella-shaped seal 6. The oil baffle ring 9 is tightly fitted into the inner arc surface of the umbrella-shaped seal 6. The top of the outer arc surface of the umbrella-shaped seal 6 is provided with an annular sealing ring 10. The inner arc surface of the annular sealing ring 10 is movably engaged with the umbrella-shaped seal 6.

[0027] The bearings of the thruster require continuous lubrication to reduce friction and wear. The thruster oil tank body 1 continuously supplies oil to the oil supply pipe connected to the bearing, ensuring that the bearing is always in a good lubrication state during high-speed rotation. In the process of optimizing and upgrading the lubrication guarantee system, a base 4 is installed at the top oil port of the oil tank 2. The upper surface of the base 4 fits tightly against the internal structure of the oil tank 2, ensuring a stable installation effect. The oil baffle end cap 7 is placed inside the oil tank 2. With the tight sealing measures at both ends, it effectively prevents the intrusion of external impurities, avoiding them from mixing into the oil and affecting the lubrication performance. It also further optimizes the storage and flow environment of the oil in the oil tank 2. When the thruster oil tank body 1 supplies oil to the oil tank 2, the well-sealed oil baffle end cap 7 can help the oil tank 2 to more rationally distribute and temporarily store the oil, thereby enabling it to be delivered to various lubrication points of the thruster.

[0028] During propeller operation, the high-speed rotation of components generates centrifugal force. The umbrella-shaped seal 6 utilizes this centrifugal force, with its opening facing the oil source inside the propeller and its tip pointing towards the external environment where impurities may enter. This effectively blocks external impurity particles, such as dust and seawater droplets, preventing them from entering the propeller and contaminating the oil. Simultaneously, when a small leakage trend occurs due to various reasons, the umbrella-shaped seal 6, mounted on the base 4, provides initial interception of the leaking oil, guiding it back into the propeller along the arc of the umbrella surface, reducing oil loss and maintaining the integrity of the lubrication system. When the propeller oil tank body 1 delivers lubricating oil to various parts of the propeller through the oil tank 2, the oil baffle ring 9 can prevent excessive... The oil splashes randomly, concentrating and guiding it to areas requiring intensive lubrication. Guided by the oil baffle ring 9, the oil flows into the drain plate 902, allowing it to remain there briefly. Utilizing gravity, heavier impurities gradually settle to the bottom of the cavity. The drain plate 902 is installed at an angle at the bottom of the annular cavity 901, guiding the settled oil along it to the interior of the oil tank 2. In this way, the used oil is initially purified and recycled, reducing oil waste and preventing the accumulation of contaminants inside the propeller. This ensures the cleanliness of the oil in the lubrication system, extends the service life of propeller components, and further guarantees the stable operation of the propeller.

[0029] An annular sealing ring 10 is placed on top of the pressure plate 8. Locking bolts 11 are connected through the surfaces of both the annular sealing ring 10 and the pressure plate 8. One end of the locking bolt 11 extends to the top of the annular sealing ring 10, and a tightening nut 12 is threaded through the top of the locking bolt 11. A spring 13 is fitted on the outer arc surface of the locking bolt 11. One end of the spring 13 abuts against the lower surface of the annular sealing ring 10, and the other end abuts against the surface of the pressure plate 8. In the fine maintenance of the lubrication and hydraulic system of the ship's propeller, the compression locking bolt 11 plays a key role. When the crew tightens the compression locking bolt 11 with tools, the axial pressure generated by the bolt is transmitted to the pressure plate 8 and moves towards the position of the annular sealing ring 10, thereby gradually reducing the space between the pressure plate 8 and the annular sealing ring 10. During the compression process, the elastic material properties of the annular sealing ring 10 are fully activated, and it will tightly fit the contact surface of the surrounding components to form an extremely tight sealing structure.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A gravity tank for a marine propeller, comprising a propeller tank body (1), characterised in that: The oil tank cabinet (2) is fixedly installed on one side of the propeller oil tank body (1), the upper surface of the oil tank cabinet (2) is connected through an oil seal cover (3), the bottom end of the oil seal cover (3) is threadedly connected with a base (4), the upper surface of the base (4) is provided with a through hole, the through hole of the upper surface of the base (4) is threadedly connected with the oil seal cover (3), the lower surface of the base (4) is provided with a sealing baffle ring (5) on one side close to the through hole, one side of the sealing baffle ring (5) is provided with an extension end, the lower surface edge of the base (4) is fixedly installed with an umbrella-shaped sealing element (6) through bolts, one end of the umbrella-shaped sealing element (6) is an expanded port, the inner top wall of the oil tank cabinet (2) close to the oil seal cover (3) is movably sleeved with an oil baffle end cover (7), the inner arc surface of the oil baffle end cover (7) is a hollow structure, the lower surface of the oil baffle end cover (7) is provided with a bending surface (701), the inner bottom wall of the oil baffle end cover (7) is sleeved with a pressing plate (8).

2. A gravity tank for a marine propulsion unit as claimed in claim 1, characterised in that: The upper surface of the pressing plate (8) is provided with an outer convex end (801), the top outer convex end (801) of the pressing plate (8) movably clamps an oil baffle ring (9), the lower surface of the oil baffle ring (9) is provided with an annular recess (901), and the top end of the outer convex end (801) is movably clamped with the annular recess (901).

3. A gravity tank for a marine propulsion unit as claimed in claim 2, characterised in that: The inner arc surface of the oil baffle ring (9) is provided with an oil discharge plate (902), the oil baffle ring (9) and the through hole of the umbrella-shaped sealing element (6) on the top are in the same plane, and the outer arc surface of the outer convex end (801) is movably sleeved with the inner arc surface of the umbrella-shaped sealing element (6).

4. A gravity tank for a marine propulsion unit as claimed in claim 3, characterised in that: The oil baffle ring (9) is tightly sleeved in the inner arc surface of the umbrella-shaped sealing element (6), the outer arc surface of the umbrella-shaped sealing element (6) is provided with an annular sealing ring (10) on the top, and the inner arc surface of the annular sealing ring (10) is movably sleeved with the umbrella-shaped sealing element (6).

5. A gravity tank for a marine propulsion unit as claimed in claim 4, characterised in that: The annular sealing ring (10) is placed on the top of the pressing plate (8), and the surface of the annular sealing ring (10) and the pressing plate (8) are both connected through locking bolts (11).

6. A gravity tank for a marine propulsion unit as claimed in claim 5, characterised in that: One end of the locking bolt (11) penetrates to the top of the annular sealing ring (10), the top of the annular sealing ring (10) is threadedly connected with a tightening nut (12) penetrating the locking bolt (11), the outer arc surface of the locking bolt (11) is sleeved with a spring (13), one end of the spring (13) abuts at the lower surface of the annular sealing ring (10), and the other end of the spring (13) abuts at the surface of the pressing plate (8).

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