Adjustable marine stern shaft sealing device

Abstract

The utility model discloses an adjustable marine stern shaft sealing device, which belongs to the technical field of sealing devices and comprises a stern shaft, a limit connecting end cover is sleeved at the bottom of the stern shaft, a pressurizing sealing mechanism for sealing is arranged inside the limit connecting end cover, a limit mounting plate is arranged at the top of the stern shaft, and a limit mounting plate is arranged on the limit mounting plate. The limiting mounting disc is fixedly connected with the tail shaft, a first limiting driving plate used for limiting the pressurizing sealing mechanism is arranged on the lower surface of the limiting mounting disc, the first limiting driving plate is fixedly connected with the limiting mounting disc, the pressurizing sealing mechanism comprises a sealing ring, and the sealing ring is rotationally connected with the tail shaft in a sealing mode; an adjustable mounting ring is arranged above the sealing ring; through mutual cooperation of multiple structures, a user can adjust the extrusion force borne by the sealing ring according to actual use requirements, the sealing effect of the sealing ring is better, and secondly, the sealing device has a reinforcing function, so that the sealing device is more reliable to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing devices, and in particular relates to an adjustable marine stern shaft sealing device. Background Art

[0002] The stern shaft, also known as the tail shaft, is the last section of the shaft system. The head end flange and the intermediate shaft flange are connected with tight-fitting bolts. The tail end is conical and is used to install the propeller. Marine stern shaft seals generally use mechanical seals or oil seals to prevent lubricating oil leakage, which causes waste and environmental pollution. At the same time, it prevents water from entering the drive shaft, wearing the bearings and emulsifying the lubricating oil. When sealing the stern shaft, a corresponding sealing device is used;

[0003] The conventional sealing device comprises a connecting end cover, a connecting ring plate, a sealing ring, an axial elastic body, and a radial elastic body. The advantage of this sealing device is that the sealing ring can be axially squeezed by the axial elastic body so that the sealing ring fits tightly against the inner side surface of the connecting end cover.

[0004] However, due to the lack of an adjustment structure, the traditional sealing device cannot adjust the extrusion force on the sealing ring according to actual use requirements, resulting in an unsatisfactory sealing effect of the sealing ring, which urgently needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide an adjustable marine stern shaft sealing device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an adjustable marine stern shaft sealing device, comprising a stern shaft, a limiting connection end cover being sleeved on the bottom of the stern shaft, a pressurized sealing mechanism for sealing being provided inside the limiting connection end cover, a limiting mounting plate being provided on the top of the stern shaft, the limiting mounting plate being fixedly connected to the stern shaft, a first limiting drive plate being provided on the lower surface of the limiting mounting plate for limiting the pressurized sealing mechanism, and the first limiting drive plate being fixedly connected to the limiting mounting plate.

[0007] As a further solution of the present invention: the pressurized sealing mechanism includes a sealing ring, which is rotatably connected to the stern shaft; an adjustable mounting ring is provided above the sealing ring, which is rotatably connected to the stern shaft; a second limiting driving plate is provided on the top of the adjustable mounting ring for cooperating with the first limiting driving plate to drive the adjustable mounting ring to move toward the sealing ring; a limiting mounting groove corresponding to the second limiting driving plate is provided on the top of the adjustable mounting ring; the second limiting driving plate is fixedly connected to the adjustable mounting ring; and a plurality of elastic limiting parts are provided on the lower surface of the adjustable mounting ring for driving the sealing ring to move in a direction away from the adjustable mounting ring.

[0008] As a further solution of the present invention: one end of the elastic limit member is fixedly connected to the adjustable mounting ring, the other end of the elastic limit member is fixedly connected to the sealing ring, a plurality of first limit reinforcement plates are provided on the side of the limit connection end cover, the first limit reinforcement plates are fixedly connected to the limit connection end cover, and a plurality of first limit sliders corresponding to the first limit reinforcement plates are provided on the side of the sealing ring.

[0009] As a further solution of the present invention: the first limit slider is fixedly connected to the sealing ring, the first limit slider is slidably connected to the first limit reinforcement plate, and a plurality of second limit sliders corresponding to the first limit reinforcement plate are provided on the side of the adjustable mounting ring.

[0010] As a further solution of the present invention: the second limit slider is fixedly connected to the adjustable mounting ring, the second limit slider is slidably connected to the first limit reinforcement plate, and a plurality of second limit sliders are arranged in a circular array on the top side of the adjustable mounting ring.

[0011] As a further solution of the present invention: a reinforcement sleeve is provided on the upper surface of the position-limiting mounting plate, the reinforcement sleeve is fixedly connected to the position-limiting mounting plate, and the reinforcement sleeve is fixedly connected to the stern shaft.

[0012] As a further solution of the present invention: the upper surface of the limit mounting plate is also provided with a plurality of second limit reinforcement plates for reinforcement, and the plurality of second limit reinforcement plates are arranged in a circular array at the bottom of the side of the reinforcement sleeve, the reinforcement sleeve is fixedly connected to the second limit reinforcement plate, and the second limit reinforcement plate is fixedly connected to the limit mounting plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a simple structure and is easy to use. When in use, through the mutual cooperation of multiple structures, the user can adjust the extrusion force exerted on the sealing ring according to actual use requirements, so that the sealing effect of the sealing ring is better. Secondly, the present invention has a reinforcement function, which makes the use of the sealing device more reliable and worthy of promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0015] Figure 2 This is a schematic structural diagram of a pressurized sealing mechanism in an embodiment of the present utility model;

[0016] Figure 3 This is a schematic structural diagram of an adjustable mounting ring in an embodiment of the present utility model;

[0017] In the figure: 1-first limit reinforcement plate, 2-limit connection end cover, 3-pressurized sealing mechanism, 4-second limit reinforcement plate, 5-reinforcement sleeve, 6-limit mounting plate, 7-first limit drive plate, 8-stern shaft, 31-sealing ring, 32-first limit slider, 33-second limit slider, 34-second limit drive plate, 35-adjustable mounting ring, 36-elastic limit member, 37-limit mounting groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figure 1-Figure 3 The utility model provides a technical solution: an adjustable marine stern shaft sealing device, comprising a stern shaft 8, a limiting connection end cover 2 is sleeved on the bottom of the stern shaft 8, a pressurized sealing mechanism 3 for sealing is arranged inside the limiting connection end cover 2, a limiting mounting plate 6 is arranged on the top of the stern shaft 8, the limiting mounting plate 6 is fixedly connected to the stern shaft 8, and a first limiting driving plate 7 for limiting the pressurized sealing mechanism 3 is arranged on the lower surface of the limiting mounting plate 6, the first limiting driving plate 7 is a neodymium iron boron magnetic plate, and the first limiting driving plate 7 is fixedly connected to the limiting mounting plate 6.

[0020] See also Figure 1 、 Figure 2 and Figure 3 The cam 35 is provided with a plurality of springs for driving the sealing ring 31 to move in a direction away from the cam 35 so as to prevent the sealing ring 31 from moving in a direction close to the cam 35.

[0021] See also Figure 2 and Figure 3The locking cam 35 is fixedly secured to the cam 35 so that the locking cam 35 can be unlocked and unlocked, and the cam 35 can be unlocked to unlock the cam 35. The cam 35 is unlocked and unlocked, and the cam 35 can be unlocked to unlock the cam 35.

[0022] See also Figure 1 In order to make the sealing device more functional, in this embodiment, preferably, a reinforcement sleeve 5 is provided on the upper surface of the limit mounting disk 6, the reinforcement sleeve 5 is fixedly connected to the limit mounting disk 6, the reinforcement sleeve 5 is fixedly connected to the stern shaft 8, and the upper surface of the limit mounting disk 6 is also provided with a plurality of second limit reinforcement plates 4 for reinforcement, and the plurality of second limit reinforcement plates 4 are arranged in a ring array at the bottom of the side of the reinforcement sleeve 5, the reinforcement sleeve 5 is fixedly connected to the second limit reinforcement plate 4, and the second limit reinforcement plate 4 is fixedly connected to the limit mounting disk 6.

[0023] Example 2: Please refer to Figure 1-Figure 3 The utility model provides a technical solution: an adjustable marine stern shaft sealing device, comprising a stern shaft 8, a limiting connection end cover 2 is sleeved on the bottom of the stern shaft 8, a pressurized sealing mechanism 3 for sealing is arranged inside the limiting connection end cover 2, a limiting mounting plate 6 is arranged on the top of the stern shaft 8, the limiting mounting plate 6 is fixedly connected to the stern shaft 8, and a first limiting driving plate 7 for limiting the pressurized sealing mechanism 3 is arranged on the lower surface of the limiting mounting plate 6, the first limiting driving plate 7 is an electromagnetic plate, and the first limiting driving plate 7 is fixedly connected to the limiting mounting plate 6.

[0024] See also Figure 1 、 Figure 2 and Figure 3The cam 35 is provided with a plurality of springs 36 for driving the sealing ring 31 to move in a direction away from the cam 35 so as to prevent the cam 35 from moving in a direction close to the sealing ring 31.

[0025] See also Figure 2 and Figure 3 The locking cam 35 is fixedly secured to the cam 35 so that the locking cam 35 can be unlocked and unlocked, and the cam 35 can be unlocked to unlock the cam 35. The cam 35 is unlocked and unlocked, and the cam 35 can be unlocked to unlock the cam 35.

[0026] See also Figure 1 In order to make the sealing device more functional, in this embodiment, preferably, a reinforcement sleeve 5 is provided on the upper surface of the limit mounting plate 6, the reinforcement sleeve 5 is fixedly connected to the limit mounting plate 6, the reinforcement sleeve 5 is fixedly connected to the stern shaft 8, and the upper surface of the limit mounting plate 6 is also provided with a plurality of stainless steel rods for reinforcement, and the plurality of stainless steel rods are arranged in a circular array at the bottom of the side of the reinforcement sleeve 5, the reinforcement sleeve 5 is fixedly connected to the stainless steel rod, and the stainless steel rod is fixedly connected to the limit mounting plate 6.

[0027] The working principle and usage process of the present invention are as follows: when it is necessary to adjust the extrusion force on the sealing ring 31, the repulsive force between the first limit driving plate 7 and the second limit driving plate 34 is adjusted, and the position of the adjustable mounting ring 35 is changed accordingly by the adjustment. The extrusion force of the elastic limit member 36 on the sealing ring 31 is changed accordingly by the change in the position of the adjustable mounting ring 35, so that the user can adjust the extrusion force on the sealing ring 31 according to actual use requirements, thereby achieving a better sealing effect of the sealing ring 31;

[0028] Therefore, through the mutual cooperation of multiple structures, the user can adjust the extrusion force on the sealing ring 31 according to actual use requirements, so that the sealing effect of the sealing ring 31 is better. Secondly, the utility model has a reinforcement function, which makes the use of the sealing device more reliable. In addition, the utility model has a simple structure and is easy to use, and is worthy of promotion and use.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0030] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An adjustable marine stern shaft sealing device, comprising a stern shaft, the bottom of which is sleeved with a position-limiting connection end cover, characterized in that: A pressurized sealing mechanism for sealing is provided inside the limit connection end cover, a limit mounting plate is provided on the top of the stern shaft, the limit mounting plate is fixedly connected to the stern shaft, and a first limit driving plate for limiting the pressurized sealing mechanism is provided on the lower surface of the limit mounting plate, and the first limit driving plate is fixedly connected to the limit mounting plate.

2. The adjustable marine stern shaft sealing device according to claim 1, characterized in that: The pressurized sealing mechanism includes a sealing ring, which is rotatably connected to the stern shaft. An adjustable mounting ring is provided above the sealing ring, which is rotatably connected to the stern shaft. A second limiting driving plate is provided on the top of the adjustable mounting ring for cooperating with the first limiting driving plate to drive the adjustable mounting ring to move toward the direction close to the sealing ring. A limiting mounting groove corresponding to the second limiting driving plate is provided on the top of the adjustable mounting ring. The second limiting driving plate is fixedly connected to the adjustable mounting ring. A plurality of elastic limiting members are provided on the lower surface of the adjustable mounting ring for driving the sealing ring to move in a direction away from the adjustable mounting ring.

3. The adjustable marine stern shaft sealing device according to claim 2, characterized in that: One end of the elastic limit member is fixedly connected to the adjustable mounting ring, and the other end of the elastic limit member is fixedly connected to the sealing ring. Several first limit reinforcement plates are provided on the side of the limit connection end cover, and the first limit reinforcement plates are fixedly connected to the limit connection end cover. Several first limit sliders corresponding to the first limit reinforcement plates are provided on the side of the sealing ring.

4. The adjustable marine stern shaft sealing device according to claim 3, characterized in that: The first limiting slider is fixedly connected to the sealing ring, the first limiting slider is slidably connected to the first limiting reinforcement plate, and a plurality of second limiting sliders corresponding to the first limiting reinforcement plate are provided on the side of the adjustable mounting ring.

5. The adjustable marine stern shaft sealing device according to claim 4, characterized in that: The second limiting slider is fixedly connected to the adjustable mounting ring, and the second limiting slider is slidably connected to the first limiting reinforcement plate. A plurality of second limiting sliders are arranged in a circular array on the top side of the adjustable mounting ring.

6. The adjustable marine stern shaft sealing device according to any one of claims 1 to 5, characterized in that: A reinforcement sleeve is provided on the upper surface of the position-limiting mounting plate. The reinforcement sleeve is fixedly connected to the position-limiting mounting plate, and the reinforcement sleeve is fixedly connected to the stern shaft.

7. The adjustable marine stern shaft sealing device according to claim 6, characterized in that: The upper surface of the limit mounting plate is also provided with several second limit reinforcement plates for reinforcement. The several second limit reinforcement plates are arranged in a circular array at the bottom of the side of the reinforcement sleeve. The reinforcement sleeve is fixedly connected to the second limit reinforcement plate, and the second limit reinforcement plate is fixedly connected to the limit mounting plate.

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