Tail shaft sealing device static ring assembly structure capable of achieving floating compensation

Abstract

The invention relates to the technical field of ship shafting design, in particular to a tail shaft sealing device static ring assembly structure capable of achieving floating compensation. The tail shaft sealing device static ring assembly capable of achieving floating compensation is simple in structure and easy to install, real-time follow-up among the static ring assembly, the static ring and the movable ring can be achieved, the axial and radial movement amount of the movable ring in the shafting operation process can be effectively compensated, damage of movement of the movable ring to a tail shaft sealing device is greatly reduced, and the service life of the tail shaft sealing device is prolonged. The probability of abnormal vibration of the stern shaft sealing device is reduced, the service life of the stern shaft sealing device is prolonged, and the operation stability is improved; the service life of the movable ring and the stationary ring can be effectively prolonged, and potential safety hazards caused by too large seawater leakage can be effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of ship shaft system design, and in particular to a static ring component structure of a stern shaft sealing device capable of floating compensation. Background Art

[0002] The stern shaft seal is an important part of the ship's shaft system, and its function is to prevent seawater from seeping into the cabin from the shaft system. The stern shaft seal is arranged in the bottom cabin of the ship near the stern, in direct contact with seawater and under the pressure of seawater. During the operation of the shaft system, the dynamic ring rotates with the shaft system, and the static ring assembly is fixed. However, when the dynamic ring rotates with the shaft system, axial and radial movement will be generated, and positive axial movement will easily increase the friction between the dynamic ring and the static ring, causing the static ring to burn out; negative axial movement will easily reduce the clamping force between the dynamic ring and the static ring, resulting in excessive seawater leakage;

[0003] The radial movement of the shaft system is transmitted to the stationary ring and the stationary ring assembly through the dynamic ring. If the stationary ring assembly is rigidly fixed, the instantaneous radial friction caused by the radial movement will easily cause scratches or burns on the surfaces of the dynamic and stationary ring friction pairs; if the stationary ring assembly is elastically fixed, the instantaneous radial friction caused by the radial movement of the dynamic ring will cause the stationary ring and the stationary ring assembly to float together, and will not generate substantial radial friction, so that the plane shape and flatness of the surfaces of the dynamic and stationary ring friction pairs will not be destroyed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to propose a floating compensation stern shaft sealing device static ring assembly structure to solve the problems of short life of dynamic and static rings, abnormal vibration, easy burning, excessive water leakage and instability during operation of the existing ship stern shaft sealing device.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A floating compensation stern shaft sealing device static ring assembly structure, the stern shaft is sleeved with a static ring 6 and a dynamic ring 7, comprising: a fixing seat 1, a spring assembly 2, a bracket 3, an aramid rubber gasket 4 and a static ring assembly 5;

[0007] The fixing seat 1 is fixedly sleeved on the stern shaft of the ship, one end of the spring assembly 2 is connected to the fixing seat 1, and the other end is connected to the static ring 6 through the static ring assembly 5, and a bracket 3 is arranged between the static ring assembly 5 and the stern shaft of the ship, the bracket 3 is fixedly connected to the fixing seat 1, and an aramid rubber gasket 4 is padded between the static ring assembly 5 and the bracket 3.

[0008] Furthermore, the fixing seat 1 is used to fix the spring assembly 2 and the bracket 3 , and a cooling water inlet 8 is provided on the fixing seat 1 .

[0009] Furthermore, the spring assembly 2 is specifically an Ω-type elastic element, which is used to compensate for the axial movement and radial movement of the stationary ring assembly 5 and limit the axial movement of the stationary ring assembly 5 within a preset range.

[0010] Furthermore, the bracket 3 is disposed between the stationary ring assembly 5 and the stern shaft of the ship, and the bracket 3 is used to limit the radial movement of the stationary ring assembly 5 within a preset range.

[0011] Furthermore, the aramid rubber gasket 4 is arranged between the stationary ring assembly 5 and the bracket 3 to further compensate for the radial vibration of the stationary ring assembly 5 .

[0012] Furthermore, one end of the stationary ring assembly 5 is fixedly connected to the spring assembly 2 , and the other end is fixedly connected to the stationary ring 6 via bolts.

[0013] Furthermore, a protective cover 9 is installed on the stationary ring assembly 5 , and the protective cover 9 is arranged to cover the outer ring of the stationary ring 6 .

[0014] Furthermore, a sealing strip 10 is provided between the stationary ring assembly 5 and the stationary ring 6 .

[0015] Furthermore, the fixing seat 1 is sleeved on the stern shaft of the ship, and the end of the fixing seat 1 is fixedly connected to the end face of the stern shaft tube through a connecting bolt.

[0016] Compared with the prior art, the present invention has the following main advantages:

[0017] The present invention proposes a floating-compensated stationary ring assembly structure for a stern shaft sealing device, which has a simple structure and is easy to install. It can realize real-time following movement between the stationary ring assembly, the stationary ring and the dynamic ring, and can effectively compensate for the axial and radial movement of the dynamic ring during the operation of the shaft system, thereby greatly reducing the harm of the dynamic ring movement to the stern shaft sealing device, reducing the probability of abnormal vibration of the stern shaft sealing device, and improving the service life and operation stability of the stern shaft sealing device. The present invention can effectively improve the service life of the dynamic and static rings, and can effectively avoid safety hazards caused by excessive seawater leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of a stationary ring assembly structure of a stern shaft sealing device capable of floating compensation in an embodiment of the present invention.

[0019] In the figure: 1-fixed seat; 2-spring assembly; 3-bracket; 4-aramid rubber gasket; 5-stationary ring assembly; 6-stationary ring; 7-dynamic ring; 8-cooling water inlet; 9-protective cover; 10-sealing strip. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0022] Embodiment 1: This embodiment provides a stationary ring assembly structure of a stern shaft sealing device capable of floating compensation, such as Figure 1 As shown, it includes: a fixing seat 1, a spring assembly 2, a bracket 3, an aramid rubber gasket 4 and a static ring assembly 5.

[0023] Among them, the fixing seat 1 is fixedly sleeved on the stern shaft of the ship, one end of the spring assembly 2 is connected to the fixing seat 1, and the other end is connected to the static ring 6 through the static ring assembly 5, and a bracket 3 is arranged between the static ring assembly 5 and the stern shaft of the ship, the bracket 3 is fixedly connected to the fixing seat 1, and an aramid rubber gasket 4 is padded between the static ring assembly 5 and the bracket 3.

[0024] Furthermore, the fixing seat 1 is used to fix the spring assembly 2 and the bracket 3 , and a cooling water inlet 8 is provided on the fixing seat 1 .

[0025] Furthermore, the spring assembly 2 is specifically an Ω-type elastic element, which is used to compensate for the axial movement and radial movement of the stationary ring assembly 5 and limit the axial movement of the stationary ring assembly 5 within a preset range.

[0026] Furthermore, the bracket 3 is disposed between the stationary ring assembly 5 and the stern shaft of the ship, and the bracket 3 is used to limit the radial movement of the stationary ring assembly 5 within a preset range.

[0027] Furthermore, the aramid rubber gasket 4 is arranged between the stationary ring assembly 5 and the bracket 3 to further compensate for the radial vibration of the stationary ring assembly 5 .

[0028] Furthermore, one end of the stationary ring assembly 5 is fixedly connected to the spring assembly 2 , and the other end is fixedly connected to the stationary ring 6 via bolts.

[0029] Furthermore, a protective cover 9 is installed on the stationary ring assembly 5 , and the protective cover 9 is arranged to cover the outer ring of the stationary ring 6 .

[0030] Furthermore, a sealing strip 10 is provided between the stationary ring assembly 5 and the stationary ring 6 .

[0031] Furthermore, the fixing seat 1 is sleeved on the stern shaft of the ship, and the end of the fixing seat 1 is fixedly connected to the end face of the stern shaft tube through a connecting bolt.

[0032] Embodiment 2: This embodiment provides a floating compensation stern shaft sealing device static ring assembly structure, which mainly includes: a fixing seat, a spring assembly, a bracket, an aramid rubber gasket, and a static ring assembly.

[0033] 1) This embodiment is equipped with a fixing seat, which can be used to fix the spring assembly and the bracket;

[0034] 2) This embodiment is equipped with a spring assembly to achieve axial compensation and radial compensation of the stationary ring assembly, and at the same time limit the axial movement of the stationary ring assembly within a certain range to prevent the stationary ring from burning due to excessive axial positive movement or excessive seawater leakage due to excessive axial negative movement;

[0035] 3) This embodiment is equipped with a bracket, which is connected to the stationary ring assembly through an aramid rubber gasket. The bracket is used to support the stationary ring assembly and the spring assembly to ensure that the stationary ring assembly floats within a limited radial range to avoid excessive radial floating that destroys the plane shape and flatness of the friction pair surfaces of the dynamic and stationary rings, causing excessive seawater leakage;

[0036] 4) This embodiment is equipped with an aramid rubber gasket, which can further provide auxiliary radial compensation between the stationary ring assembly and the fixing seat on the basis of the spring assembly, and is convenient for the installation of the stern shaft sealing device as a whole. It can also support the stationary ring assembly during the operation of the shaft system, so that the stationary ring assembly does not vibrate easily, thereby avoiding abnormal vibration of the stern shaft sealing device during the operation of the shaft system;

[0037] 5) This embodiment is equipped with one stationary ring assembly, which is supported and compensated in radial direction by the bracket, aramid rubber gasket and spring assembly, and is supported and limited in axial direction by the spring assembly.

[0038] Furthermore, all parts involved in this application that are not described in detail are the same as the prior art or are implemented using the prior art.

[0039] In summary:

[0040] The present invention proposes a floating-compensated stationary ring assembly for a stern shaft sealing device, which has a simple structure and is easy to install. It can realize real-time following movement between the stationary ring assembly, the stationary ring and the dynamic ring, and can effectively compensate for the axial and radial movement of the dynamic ring during the operation of the shaft system, thereby greatly reducing the harm of the dynamic ring movement to the stern shaft sealing device, reducing the probability of abnormal vibration of the stern shaft sealing device, and improving the service life and operation stability of the stern shaft sealing device. The present invention can effectively improve the service life of the dynamic and static rings, and can effectively avoid safety hazards caused by excessive seawater leakage.

[0041] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A floating compensation stern shaft sealing device static ring assembly structure, wherein the stern shaft is sleeved with a static ring (6) and a dynamic ring (7), characterized in that: It comprises a fixing seat (1), a spring assembly (2), a bracket (3), an aramid rubber gasket (4) and a stationary ring assembly (5); The fixing seat (1) is fixedly sleeved on the stern shaft of the ship, one end of the spring assembly (2) is connected to the fixing seat (1), and the other end is connected to the static ring (6) through the static ring assembly (5), and a bracket (3) is provided between the static ring assembly (5) and the stern shaft of the ship, the bracket (3) is fixedly connected to the fixing seat (1), and an aramid rubber gasket (4) is provided between the static ring assembly (5) and the bracket (3).

2. The static ring assembly structure of a stern shaft sealing device capable of floating compensation according to claim 1 is characterized in that: The fixing seat (1) is used to fix the spring assembly (2) and the bracket (3), and a cooling water inlet (8) is provided on the fixing seat (1).

3. The static ring assembly structure of a stern shaft seal device capable of floating compensation according to claim 1, characterized in that: The spring assembly (2) is specifically an Ω-type elastic element, which is used to compensate for the axial movement and radial movement of the stationary ring assembly (5) and limit the axial movement of the stationary ring assembly (5) within a preset range.

4. The static ring assembly structure of a stern shaft seal device capable of floating compensation according to claim 1, characterized in that: The bracket (3) is arranged between the stationary ring assembly (5) and the stern shaft of the ship, and the bracket (3) is used to limit the radial movement of the stationary ring assembly (5) within a preset range.

5. The static ring assembly structure of a stern shaft sealing device capable of floating compensation according to claim 4 is characterized in that: The aramid rubber gasket (4) is arranged between the stationary ring assembly (5) and the bracket (3) to further compensate for the radial vibration of the stationary ring assembly (5).

6. The static ring assembly structure of a stern shaft sealing device capable of floating compensation according to claim 1, characterized in that: One end of the stationary ring assembly (5) is fixedly connected to the spring assembly (2), and the other end is fixedly connected to the stationary ring (6) via bolts.

7. The static ring assembly structure of a stern shaft sealing device capable of floating compensation according to claim 6, characterized in that: A protective cover (9) is installed on the stationary ring assembly (5), and the protective cover (9) is arranged on the outer ring of the stationary ring (6).

8. The static ring assembly structure of a stern shaft seal device capable of floating compensation according to claim 6, characterized in that: A sealing strip (10) is provided between the stationary ring assembly (5) and the stationary ring (6).

9. The static ring assembly structure of a stern shaft sealing device capable of floating compensation according to claim 1, characterized in that: The fixing seat (1) is sleeved on the stern shaft of the ship, and the end of the fixing seat (1) is fixedly connected to the end face of the stern shaft tube via a connecting bolt.

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