Lifting type full-rotation steering oar lifting sealing structure

Abstract

The utility model discloses a lifting type full-rotation steering oar lifting sealing structure which comprises a sealing seat and a lifting shaft, a sealing cavity is formed in the sealing seat, the sealing cavity penetrates through the sealing seat in the vertical direction, the lifting shaft penetrates through the sealing cavity, and the lifting shaft is in sliding fit with the sealing seat; a first sealing ring, a second sealing ring, a guide ring and a third sealing ring which are sequentially arranged from top to bottom are mounted between the lifting shaft and the sealing seat, the first sealing ring, the second sealing ring, the guide ring and the third sealing ring are mounted on the sealing seat, and the first sealing ring, the second sealing ring, the guide ring and the third sealing ring are in sliding fit with the lifting shaft. In the scheme, the three sealing rings form a triple sealing barrier between the sealing seat and the lifting shaft, so that seawater intrusion can be effectively prevented; the guide ring can play a role in guiding and can also bear thrust generated when the propeller works, and the situation that the sealing effect is affected by displacement of the lifting shaft is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ship sealing structure field especially relates to a lifting type full-rotation rudder propeller lifting sealing structure. BACKGROUND

[0002] The lifting type side thrust, full-rotation rudder propeller device is widely used in ships with higher maneuverability requirements, such as ocean engineering ships, maritime law enforcement ships, scientific research ships, offshore oil drilling platforms, etc., and exhibits excellent performance in complex water areas, narrow channels or occasions requiring high maneuverability, improves the maneuverability and flexibility of the ship, and meets the needs under various complex water areas and operating conditions.When power positioning, the rudder propeller extends out of the ship body to provide thrust; when free sailing, the rudder propeller is retracted into the ship body to reduce the sailing resistance. During the extension and retraction of the rudder propeller into the ship body, the lifting shaft needs to pass through the cabin and seawater, and a dynamic sealing device needs to be provided to prevent seawater from entering the cabin through the gap of the telescopic shaft.

[0003] The lifting sealing form of the conventional lifting type side thrust, rudder propeller has experienced two stages. The initial sealing completely relies on gap sealing, that is, the seawater resistance formed by the small gap is used to prevent leakage, which is the simplest dynamic sealing. The gap sealing has the advantages of simplicity, small resistance and good lubrication, and the disadvantage is that the wear amount cannot be compensated, and the sealing fails when the wear amount is too large. Thereafter, packing sealing appears, that is, a plurality of packing rings surround the lifting shaft, and the packing ring is pressed by the end cover. The advantage is that the wear amount can be compensated, and the disadvantage is that an additional oil supply needs to be set, and the oil direction needs to be changed according to the water inflow, which is more cumbersome to maintain. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problem of poor sealing effect and cumbersome maintenance of the lifting shaft in the ship rudder propeller in the prior art, the purpose of the utility model is to provide a lifting type full-rotation rudder propeller lifting sealing structure, which has better sealing effect, lower maintenance frequency and better service life.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a lifting type full-rotation rudder propeller lifting sealing structure, comprising a sealing seat and a lifting shaft, a sealing cavity is arranged on the sealing seat, the sealing cavity penetrates the sealing seat in the up-down direction, the lifting shaft passes through the sealing cavity, and the lifting shaft and the sealing seat are in sliding fit; a first sealing ring, a second sealing ring, a guide ring and a third sealing ring are sequentially arranged from top to bottom between the lifting shaft and the sealing seat, the first sealing ring, the second sealing ring, the guide ring and the third sealing ring are installed on the sealing seat, and the first sealing ring, the second sealing ring, the guide ring and the third sealing ring are in sliding fit with the lifting shaft.

[0006] As a preferred, the first sealing ring, the second sealing ring and the third sealing ring are all Gley rings.

[0007] Preferably, the guide ring is a split guide ring, and the guide ring is made of a copper alloy material.

[0008] Preferably, the sealing seat is provided with an oil supply lubricating structure for supplying oil to the sealing ring and the guide ring.

[0009] Preferably, the lubricating structure comprises an oil cup, an oil channel and a lubricating groove, the lubricating groove is arranged on the inner wall of the sealing cavity, the oil cup is arranged on the sealing seat, the oil channel is arranged on the sealing seat, and the oil cup and the lubricating groove are communicated through the oil channel; the grease stored in the oil cup can enter the lubricating groove through the oil channel to lubricate the lifting shaft, the first sealing ring, the second sealing ring, the guide ring and the third sealing ring.

[0010] Preferably, the lubricating groove has two lubricating grooves, and the two lubricating grooves are communicated with the oil channel.

[0011] Preferably, the first lubricating groove is arranged between the first sealing ring and the second sealing ring, and the second lubricating groove is arranged between the guide ring and the third sealing ring.

[0012] Preferably, the sealing seat is provided with a ring-shaped cutting edge below the sealing seat, and the lifting shaft extends from the cutting edge; when the lifting shaft moves upward, the cutting edge can remove marine attachments on the outer surface of the lifting shaft.

[0013] Preferably, the cutting edge is subjected to hardening treatment.

[0014] Preferably, the outer periphery of the sealing seat is provided with a connecting portion, the bottom of the sealing seat is inserted into the through hole of the base, the connecting portion of the sealing seat is pressed on the base, the connecting portion and the base are fixedly connected through a second bolt, and a fourth sealing ring is arranged between the connecting portion and the base.

[0015] The technical scheme of the utility model has the advantages that the three sealing rings form a triple sealing barrier between the sealing seat and the lifting shaft, thereby effectively preventing seawater from invading; the guide ring has two functions: one is to guide the lifting shaft, and the other is to bear the thrust generated when the propeller works, thereby preventing the displacement of the lifting shaft from affecting the sealing effect; the scheme can effectively improve the sealing effect, reduce the sealing frequency of the maintenance sealing structure, and prolong the service life of the sealing structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the full-rotation rudder propeller lifting sealing structure.

[0017] Figure 2 It is a structural schematic view of the full-rotation rudder propeller lifting sealing structure. Figure 1 It is an enlarged view of A in the figure.

[0018] Label: 1, lifting shaft; 2, oil cup; 3, first sealing ring; 4, second sealing ring; 5, sealing seat; 6, fourth sealing ring; 7, sealing pressing plate; 8, first bolt; 9, base; 10, third sealing ring; 11, gasket; 12, second bolt; 13, guide ring; 14, cutting edge. DETAILED DESCRIPTION

[0019] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0020] In the description of the present application, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0021] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0022] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] like Figure 1 and Figure 2 The above-displayed lifting and sealing structure for a fully rotating rudder propeller includes a sealing seat 5 and a lifting shaft 1. The sealing seat 5 is provided with a sealing cavity, which extends vertically through the sealing seat 5. The lifting shaft 1 passes through the sealing cavity, and the lifting shaft 1 and the sealing seat 5 are in sliding engagement.

[0025] A first sealing ring 3, a second sealing ring 4, a guide ring 13, and a third sealing ring 10 are installed between the lifting shaft 1 and the sealing seat 5, arranged sequentially from top to bottom. The first sealing ring 3, the second sealing ring 4, the guide ring 13, and the third sealing ring 10 are installed on the sealing seat 5, and the first sealing ring 3, the second sealing ring 4, the guide ring 13, and the third sealing ring 10 are all in sliding fit with the lifting shaft 1.

[0026] With this configuration, the three sealing rings in the above scheme form a triple sealing barrier between the sealing seat 5 and the lifting shaft 1, which can effectively prevent seawater from entering. The guide ring 13 has two functions: first, to guide the lifting shaft 1; and second, to withstand the thrust generated when the propeller is working, so as to prevent the displacement of the lifting shaft 1 from affecting the sealing effect.

[0027] In this embodiment, the first sealing ring 3, the second sealing ring 4, and the third sealing ring 10 are all Glyd rings. Glyd rings have excellent wear resistance, eliminating the need for frequent replacement or maintenance and reducing maintenance frequency.

[0028] In this embodiment, the guide ring 13 is a split guide ring, and the guide ring 13 is made of copper alloy material; it is corrosion resistant, high temperature resistant, self-lubricating and has good friction performance.

[0029] In this embodiment, the sealing seat 5 is provided with an oil supply and lubrication structure that supplies oil to the sealing ring and the guide ring 13.

[0030] Specifically, the lubrication structure includes an oil cup 2, an oil passage, and a lubrication groove. The lubrication groove is located on the inner wall of the sealing cavity. The oil cup 2 is mounted on the sealing seat 5, and the oil passage is located on the sealing seat 5. The oil cup 2 and the lubrication groove are connected through the oil passage. The grease stored in the oil cup 2 can enter the lubrication groove through the oil passage. The grease entering the lubrication groove directly contacts the outer wall of the lifting shaft 1, and the grease can also lubricate the sealing ring and guide ring 13 through the gap between the sealing seat 5 and the lifting shaft 1. In this way, by periodically adding grease to the oil cup 2, the sealing performance and durability of the sealing structure can be further improved.

[0031] Preferably, there are two lubrication grooves, both of which are connected to the oil passage; the first lubrication groove is located between the first sealing ring 3 and the second sealing ring 4, and the second sealing groove is located between the guide ring 13 and the third sealing ring 10. This ensures that the guide ring 13 and each sealing ring receive sufficient and effective lubrication, thereby improving the sealing performance and lifespan of the sealing structure.

[0032] In this embodiment, an annular cutting edge 14 is provided below the sealing seat 5, and the lifting shaft 1 extends from the cutting edge 14. When the lifting shaft 1 moves upward, the cutting edge 14 can remove marine deposits from the outer surface of the lifting shaft 1, while preventing the marine deposits from damaging the sealing ring and guide ring 13. This keeps the outer wall of the lifting shaft 1 clean, making the sealing performance of the sealing structure more stable and extending the service life of the sealing structure. More preferably, the cutting edge of the cutting edge 14 is hardened to HRC50 or higher; the cutting edge angle b of the cutting edge 14 is 45°.

[0033] In this embodiment, the inner wall of the sealing cavity in the sealing seat 5 is provided with a first mounting groove, a second mounting groove, a third mounting groove and a fourth mounting groove, which are arranged sequentially from top to bottom, with the fourth mounting groove protruding from the bottom of the sealing seat 5; the first sealing ring 3 is installed in the first mounting groove, the second sealing ring 4 is installed in the second mounting groove, the guide ring 13 is installed in the third mounting groove, the third sealing ring 10 is installed in the fourth mounting groove, the sealing pressure plate 7 is fixed to the bottom of the sealing seat 5 by the first bolt 8, and the sealing pressure plate 7 fixes the third sealing ring 10 in the fourth mounting groove, the lifting shaft 1 passes through the sealing pressure plate 7, and the cutting edge 14 is provided on the sealing pressure plate 7.

[0034] In this embodiment, a connecting portion protrudes from the outer circumferential surface of the sealing seat 5. The bottom of the sealing seat 5 is inserted into the through hole of the base 9. The connecting portion of the sealing seat 5 presses against the base 9. The connecting portion and the base 9 are fixedly connected by a second bolt 12. A washer 11 is fitted on the head of the second bolt, and the head of the second bolt is pressed tightly against the connecting portion by the washer. Furthermore, a fourth sealing ring 6, which is an O-ring, is provided between the connecting portion and the base 9. During operation, the lifting shaft 1 moves up and down. The portion of the lifting shaft 1 below the base 9 extends into the seawater, and the portion of the lifting shaft 1 above the base 9 is the compartment.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A lifting and azimuth-type rudder propeller lifting and sealing structure, comprising a sealing seat (5) and a lifting shaft (1), wherein a sealing cavity is provided on the sealing seat (5), the sealing cavity extends vertically through the sealing seat (5), the lifting shaft (1) passes through the sealing cavity, and the lifting shaft (1) and the sealing seat (5) are in sliding engagement; characterized in that: A first sealing ring (3), a second sealing ring (4), a guide ring (13), and a third sealing ring (10) are installed between the lifting shaft (1) and the sealing seat (5) in sequence from top to bottom. The first sealing ring (3), the second sealing ring (4), the guide ring (13), and the third sealing ring (10) are installed on the sealing seat (5), and the first sealing ring (3), the second sealing ring (4), the guide ring (13), and the third sealing ring (10) are all in sliding fit with the lifting shaft (1).

2. The lifting and sealing structure for a lifting, fully rotating rudder propeller according to claim 1, characterized in that: The first sealing ring (3), the second sealing ring (4), and the third sealing ring (10) are all Glyd rings.

3. The lifting and sealing structure for a lifting, fully rotating rudder propeller according to claim 1, characterized in that: The guide ring (13) is a split guide ring, and the guide ring (13) is made of copper alloy.

4. The lifting and sealing structure for a fully rotating rudder propeller according to claim 1, characterized in that: The sealing seat (5) is provided with an oil supply and lubrication structure that supplies oil to the sealing ring and the guide ring (13).

5. The lifting and sealing structure for a fully rotating rudder propeller according to claim 4, characterized in that: The lubrication structure includes an oil cup (2), an oil passage, and a lubrication groove. The lubrication groove is set on the inner wall of the sealing cavity. The oil cup (2) is installed on the sealing seat (5). The oil passage is set on the sealing seat (5). The oil cup (2) and the lubrication groove are connected through the oil passage. The grease stored in the oil cup (2) can enter the lubrication groove through the oil passage to the lifting shaft (1), the first sealing ring (3), the second sealing ring (4), the guide ring (13) and the third sealing ring (10).

6. The lifting and sealing structure for a fully rotating rudder propeller according to claim 5, characterized in that: There are two lubrication grooves, both of which are connected to the oil passage.

7. The lifting and sealing structure for a fully rotating rudder propeller according to claim 6, characterized in that: The first lubrication groove is located between the first sealing ring (3) and the second sealing ring (4), and the second sealing groove is located between the guide ring (13) and the third sealing ring (10).

8. The lifting and sealing structure for a lifting, fully rotating rudder propeller according to claim 1, characterized in that: A ring-shaped cutting edge (14) is provided below the sealing seat (5), and the lifting shaft (1) extends out from the cutting edge (14); when the lifting shaft (1) moves upward, the cutting edge (14) can remove marine deposits from the outer surface of the lifting shaft (1).

9. The lifting and sealing structure for a fully rotating rudder propeller according to claim 8, characterized in that: The cutting edge of the cutting edge (14) is hardened.

10. The lifting and sealing structure for a fully rotating rudder propeller according to claim 1, characterized in that: The outer circumferential surface of the sealing seat (5) has a protruding connecting part. The bottom of the sealing seat (5) is inserted into the through hole of the base (9). The connecting part of the sealing seat (5) is pressed on the base (9). The connecting part and the base (9) are fixedly connected by the second bolt (12). A fourth sealing ring (6) is provided between the connecting part and the base (9).

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