Paddle shaft sealing protection structure

Abstract

The utility model relates to the technical field of paddle shaft sealing protection, and discloses a paddle shaft sealing protection structure which comprises a gearbox and an adjusting ring, the adjusting ring is fixedly connected to the outside of the gearbox, the outside of the adjusting ring is detachably connected with a protective cover, the outer diameter of the adjusting ring is smaller than the inner diameter of the protective cover, one end of the protective cover is fixedly connected with a fishing net cutter, and the other end of the protective cover is fixedly connected with a connecting rod. The adjusting ring is used for determining the installation position of the protective cover on the end face of the gear box, a propeller hub is arranged at one end of the protective cover, positioning is conducted through the adjusting ring, and when the gap between the fishing net cutting knife at one end of the protective cover and the propeller hub meets the standard requirement, the adjusting ring is fixed to the end face of the gear box; and then the end faces of the adjusting ring and the gear box are painted according to the coating requirement of the hull outer plate, finally, the protective cover is fixedly connected with the adjusting ring, installation of the protective cover is completed, and therefore paint in the inner side area of the protective cover is prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to propeller shaft sealing protection technical field, concretely is a propeller shaft sealing protection structure. BACKGROUND

[0002] Propeller shaft sealing is an important component of shafting device, and the propeller shaft sealing function is to prevent the leakage of gear box oil, and prevent seawater from entering the ship cavity through the gear box to cause serious safety hazards due to oil deterioration, so it is very important to maintain the normal function of the propeller shaft sealing. Since the propeller shaft sealing is arranged at the rear end of the propeller hub, this part of the area is submerged in seawater all year round, and the environment in seawater is complex, with many sundries and hard objects such as fishing nets and gravel. In order to protect the rear shaft seal from being damaged by external sundries and the like, a protective cover is usually provided outside the rear shaft seal. With such a protective cover, the rear shaft seal can be protected from being damaged by external hard objects.

[0003] The common installation form of the protective cover is to be directly welded on the gear box structure, and there are two cases as follows: one is that the protective cover is directly positioned and welded on the rear end surface of the gear box by the bow end, and this installation form is very difficult to position in actual installation due to the large size and heavy weight of the protective cover, and the position needs to be adjusted constantly, and the gear box end surface area needs to be sufficient to ensure that the protective cover can be adjusted.

[0004] Two is that the protective cover is directly positioned and welded on the outer circular structure of the gear box by the front end of the gear box, and this installation form must require that the installation center line of the gear box is close to the center of the outer circular structure of the gear box, otherwise the installation will be misaligned. In the actual axis positioning process, it is common that the center line of the gear box axis is far away from the center of the gear box. In this case, when the protective cover is installed, a part of the protective cover is away from the outer circular structure of the gear box, and cannot be welded.

[0005] At the same time, when the protective cover is welded on the gear box, the welding operation will cause the paint on the inside of the protective cover to be damaged. Since the protective cover is a whole circular ring after welding, and only two observation openings are reserved on the protective cover, there is not enough space to repair or paint the damaged paint on the protective cover. Since the protective cover is submerged in seawater all year round, the damaged paint area will accelerate the corrosion of the protective cover.

[0006] In view of the above problems, it is urgent to design a propeller shaft sealing protection structure to solve the problem that the protective cover is directly welded on the gear box, causing the paint on the inside of the protective cover to be damaged. CONTENT OF THE UTILITY MODEL

[0007] In order to solve the technical problem that the existing protective cover is directly welded on the gear box, causing the paint on the inside of the protective cover to be damaged, the utility model provides a propeller shaft sealing protection structure.

[0008] The utility model discloses the following technical scheme is adopted: a paddle shaft sealing protection structure, including gear box and adjusting ring, the adjusting ring fixed connection is in gear box's outside, the outside detachable connection of adjusting ring has the protective cover, the outside diameter of adjusting ring is less than the inside diameter of protective cover, one end fixed mode connection of protective cover has fishing net cutter, the adjusting ring is used for determining the installation position of protective cover gear box end face, one end of protective cover is provided with paddle hub.

[0009] Preferably, the adjusting ring and the protective cover are both provided with a plurality of threaded holes, and the adjusting ring and the protective cover are respectively connected with the plurality of threaded holes through adjusting ring fixing bolts and protective cover fixing bolts.

[0010] Preferably, the threaded holes are provided with a layer of anti-loosening glue.

[0011] Preferably, the head of the adjusting ring fixing bolt and the protective cover fixing bolt is provided with a through hole, and the adjusting ring fixing bolt and the protective cover fixing bolt are made of stainless steel.

[0012] Preferably, the adjusting ring comprises two half rings and an intermediate fixed ring, and the two half rings are detachably connected with the protective cover.

[0013] Preferably, the adjusting ring fixing bolt and the protective cover fixing bolt are externally welded with anti-loosening steel wires, the anti-loosening steel wires are used for preventing the protective cover from loosening and falling off from the adjusting ring, and the anti-loosening steel wires are made of stainless steel.

[0014] Preferably, the rib of the adjusting ring is fixedly connected with the inner side of the protective cover through an adjusting ring rib fixing bolt.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] In use, the adjusting ring is first positioned, and when the gap between the fishing net cutter at one end of the protective cover and the paddle hub reaches the standard requirement, the adjusting ring is fixed on the end face of the gear box, then the end face of the adjusting ring and the gear box is painted according to the ship plate painting requirement, finally the protective cover is fixedly connected with the adjusting ring, the installation of the protective cover is completed, and thus the paint on the inner side of the protective cover is prevented from being damaged.

[0017] In use, when the stern tube shaft seal needs to be overhauled and maintained, the protective cover only needs to be disassembled, and the adjusting ring does not affect the overhaul and maintenance, and the protective cover does not need to be repositioned when being reinstalled. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole structure schematic diagram of the utility model.

[0019] In the figure: 1, gear box; 2, adjusting ring; 3, adjusting ring fixing bolt; 4, protective cover fixing bolt; 5, protective cover; 6, fishing net cutter; 7, adjusting ring rib fixing bolt; 8, hub. DETAILED DESCRIPTION

[0020] The utility model will be described further, combined with the drawings and specific implementation, it is to be explained that under the premise of not conflicting, the following described each embodiment or each technical feature between can be combined randomly to form new embodiment.

[0021] Example 1: please refer to Figure 1 The hub sealing protection structure of the embodiment, including gear box 1 and adjusting ring 2, adjusting ring 2 is fixedly connected at the outside of gear box 1, the outside of adjusting ring 2 is detachably connected with protective cover 5, the outer diameter of adjusting ring 2 is less than the inner diameter of protective cover 5, one end of protective cover 5 is fixedly connected with fishing net cutter 6, adjusting ring 2 is used to determine the installation position of protective cover 5 at the end surface of gear box 1, one end of the protective cover 5 is provided with hub 8, adjusting ring 2 includes two semicircular rings plus an intermediate fixed ring, and the two semicircular rings are detachably connected with protective cover 5;

[0022] Among them, adjusting ring 2 is preliminarily positioned first, and adjusting ring 2 is fixed at the end surface of gear box 1 by adjusting ring fixing bolt 3, then protective cover 5 is placed on the outer circumferential surface of adjusting ring 2, whether the gap between fishing net cutter 6 at one end of protective cover 5 and hub 8 reaches the standard requirement is checked, if it does not reach the standard requirement, the position of adjusting ring 2 is adjusted according to the error between the gap and the standard requirement, and the inner side of protective cover 5 is fixed at the rib of adjusting ring 2 by adjusting ring rib fixing bolt 7;

[0023] Secondly, when the gap between fishing net cutter 6 and hub 8 reaches the standard requirement, adjusting ring 2 is fixed at the end surface of gear box 1 by adjusting ring fixing bolt 3, because the size of adjusting ring 2 is less than the size of protective cover 5, and the weight of adjusting ring 2 is less than the weight of protective cover 5, it is easier to position, and there is enough space to paint the end surface of adjusting ring 2 and gear box 1 before connecting with protective cover 5, and the end surface of adjusting ring 2 and gear box 1 is painted according to the ship body plating painting requirement, finally protective cover 5 is fixedly connected with adjusting ring 2, and the installation of protective cover 5 is completed;

[0024] At the same time, the outer diameter of adjusting ring 2 is smaller than the outer diameter size of the stern column, there will be more adjustable space, the misalignment caused by shafting positioning deviation can be removed, in addition, when the stern tube shaft seal needs to be overhauled and maintained, protective cover 5 only needs to be disassembled, adjusting ring 2 will not affect the overhaul and maintenance, and protective cover 5 does not need to be repositioned;

[0025] Further, the adjusting ring 2 and the protective cover 5 are both provided with a plurality of threaded holes, the adjusting ring 2 and the protective cover 5 are respectively screwed with the plurality of threaded holes through the adjusting ring fixing bolt 3 and the protective cover fixing bolt 4, the threaded holes are provided with a layer of anti-loosening glue, the adjusting ring fixing bolt 3 and the protective cover fixing bolt 4 are both provided with a through hole at the head, the adjusting ring fixing bolt 3 and the protective cover fixing bolt 4 are both made of stainless steel, the adjusting ring fixing bolt 3 and the protective cover fixing bolt 4 are both welded with an anti-loosening steel wire outside, the anti-loosening steel wire is used for preventing the protective cover 5 from loosening and falling off from the adjusting ring 2, and the anti-loosening steel wire is made of stainless steel.

[0026] Working principle: first, positioning is performed through the adjusting ring 2, when the gap between the fishing net cutter 6 at one end of the protective cover 5 and the hub 8 reaches the standard requirement, the adjusting ring 2 is fixed at the end face of the gear box 1 through the adjusting ring fixing bolt 3, since the size of the adjusting ring 2 is smaller than the size of the protective cover 5, and the weight of the adjusting ring 2 is smaller than the weight of the protective cover 5, positioning is relatively easy, and there is enough space for painting the end face of the adjusting ring 2 and the gear box 1 before being connected with the protective cover 5, and the end face of the adjusting ring 2 and the gear box 1 is painted according to the painting requirement of the ship body plate, finally, the protective cover 5 is fixedly connected with the adjusting ring 2, the installation of the protective cover 5 is completed, when the stern tube shaft seal needs to be overhauled and maintained, only the protective cover 5 needs to be disassembled, the adjusting ring 2 does not affect the overhauling and maintenance, and the protective cover 5 does not need to be repositioned.

[0027] The above embodiment is only a preferred embodiment of the present application, and cannot be used to limit the range of protection of the present application, and any non-substantial change and replacement made by the person skilled in the art on the basis of the present application all belong to the range of protection of the present application.

Claims

1. A propeller shaft sealing protection structure, comprising a gear box (1) and an adjusting ring (2), characterized in that: The adjusting ring (2) is fixedly connected to the outside of the gear box (1); a protective cover (5) is detachably connected to the outside of the adjusting ring (2); the outer diameter of the adjusting ring (2) is smaller than the inner diameter of the protective cover (5); one end of the protective cover (5) is fixedly connected to a fishing net cutter (6); the adjusting ring (2) is used to determine the installation position of the protective cover (5) on the end face of the gear box (1); and one end of the protective cover (5) is provided with a propeller hub (8).

2. A propeller shaft sealing protection structure according to claim 1, characterized in that: The adjusting ring (2) and the protective cover (5) are both provided with a plurality of threaded holes, and the adjusting ring (2) and the protective cover (5) are respectively threadedly connected to the plurality of threaded holes via an adjusting ring fixing bolt (3) and a protective cover fixing bolt (4).

3. A propeller shaft sealing protection structure according to claim 2, characterized in that: The threaded hole is provided with an anti-loosening glue layer.

4. The propeller shaft sealing protection structure according to claim 2, characterized in that: Through holes are provided on the heads of the adjusting ring fixing bolt (3) and the protective cover fixing bolt (4), and the adjusting ring fixing bolt (3) and the protective cover fixing bolt (4) are made of stainless steel.

5. The propeller shaft sealing protection structure according to claim 1, characterized in that: The adjusting ring (2) comprises two semicircular rings and a middle fixed ring, and the two semicircular rings are detachably connected to the protective cover (5).

6. The propeller shaft sealing protection structure according to claim 1, characterized in that: Anti-loosening steel wires are welded to the outside of the adjusting ring fixing bolts (3) and the protective cover fixing bolts (4). The anti-loosening steel wires are used to prevent the protective cover (5) from loosening and falling off from the adjusting ring (2). The anti-loosening steel wires are made of stainless steel.

7. The propeller shaft sealing protection structure according to claim 6, characterized in that: The ribs of the adjustment ring (2) are fixedly connected to the inner side of the protective cover (5) via adjustment ring rib fixing bolts (7).

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