A device for facilitating the removal and replacement of a high speed marine stern shaft seal ring

Abstract

The utility model relates to the technical field of seal ring dismounting, and concretely relates to a device facilitating the dismounting of a high-speed ship stern shaft seal ring, comprising a rectangular box body and a threaded groove, wherein the rectangular box body is provided with an extension assembly at equal intervals on the outside; the rotation of a transmission shaft drives a structure plate to extend out through a screw rod and a threaded groove push structure, so that a hook hooks the side edge of the seal ring; the reverse rotation of the transmission shaft drives the structure plate to retract, and the seal ring is pulled out of the seal device through the hook, so that the seal ring can be dismounted from the seal device; when the seal ring is installed, the side edge of the seal ring is moved into a groove on the inside of the seal device; the transmission shaft is rotated again to drive the structure plate to extend out; the side edge of the seal ring is pushed into the groove on the inside of the seal device through the hook; the rotation of the shaft sleeve drives the rotation of the rectangular box body and the hook; the side edge of the seal ring is completely pushed into the seal device; the operation is simple, and the personnel can effectively assist the installation and dismounting of the seal ring of the ship stern shaft.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring disassembly and assembly technology, specifically to a device that facilitates the disassembly and assembly of a high-speed ship stern shaft sealing ring. Background Technology

[0002] The stern shaft seal is a key component in the ship's propeller drive system. It is mainly used to prevent seawater from seeping into the hull and lubricating oil from leaking. Modern ships commonly use lip seals made of rubber materials (such as fluororubber FKM, hydrogenated nitrile rubber HNBR) or polytetrafluoroethylene (PTFE).

[0003] Currently, the stern sealing device has multiple sealing rings inside. During maintenance and replacement, it is not easy to remove the sealing rings from the sealing device. Tools such as screwdrivers are required to pry the outer side of the sealing ring from the inside of the sealing device in order to remove the sealing ring. This operation is time-consuming and laborious. Therefore, a device is proposed to facilitate the removal and installation of the stern shaft sealing ring of high-speed ships. The sealing ring is hooked by four sets of hooks, and then the sealing ring hooked by the hooks is pulled out of the sealing device by the retractable structural plate, so that the sealing ring can be removed from the sealing device. Utility Model Content

[0004] To address the problems in the existing technology, this utility model provides a device for easy disassembly and assembly of the stern shaft seal ring of a high-speed ship. The seal ring is hooked onto the edge by four sets of hooks, and then the hooked seal ring is pulled out of the sealing device by a retractable structural plate, thereby removing the seal ring from the sealing device.

[0005] The technical solution adopted by this utility model to solve its technical problem is a device for easy disassembly and assembly of high-speed ship stern shaft seal ring, including a rectangular box and a threaded groove. Telescopic components are equidistantly arranged on the outside of the rectangular box. The telescopic components include a rectangular plate sleeve fixed to the outside of the rectangular box by bolts. A structural plate is sleeved on one end of the rectangular plate sleeve. A hook is fixed to the end of the structural plate away from the rectangular box by bolts. A threaded rod is arranged inside the rectangular plate sleeve. The top of the rectangular box is fixed with a cover by bolts, and the top of the cover is fixed with a bushing by a flange. A drive shaft is fitted inside the bushing through a bearing.

[0006] By adopting the above technical solution, the rotating drive shaft pushes the structural plate to extend and retract through the lead screw. When the hook catches the side of the sealing ring, the structural plate retracts into the rectangular plate sleeve, pulling out the sealing ring. When installing the sealing ring, the extension and retraction of the structural plate pushes the side of the sealing ring into the groove inside the sealing device through the hook.

[0007] Specifically, a structural block is provided at one end of the rectangular plate sleeve, and the lead screw is sleeved inside the structural block through a bearing.

[0008] Specifically, a large helical gear is fixedly fitted at the bottom end of the drive shaft inside the rectangular box via a flat key, and a small helical gear is fixedly fitted at one end of the lead screw inside the rectangular box via a flat key. The small helical gear and the large helical gear mesh with each other.

[0009] Specifically, one end of the structural plate has a threaded groove, and the end of the lead screw away from the small helical gear is located inside the threaded groove.

[0010] Specifically, the threaded groove is located on both sides inside the rectangular plate sleeve, and limit blocks are fixed by bolts.

[0011] Specifically, an anti-slip sleeve is provided on the outer side of the bushing, and a rocker plate is fixedly sleeved on the top of the drive shaft by a flat key.

[0012] The beneficial effects of this utility model are: The present invention describes a device for facilitating the installation and removal of a high-speed ship stern shaft seal. When the drive shaft rotates, it drives the lead screw to rotate via a large and small helical gear. This drives the structural plate to extend through the threaded groove, causing the hook to catch the side of the seal ring. Reversing the drive shaft causes the structural plate to retract, pulling the seal ring out of the sealing device through the hook. Thus, the seal ring can be removed from the sealing device. When it is necessary to install the seal ring in the sealing device, the side of the seal ring is moved into the groove inside the sealing device. Similarly, rotating the drive shaft pushes the structural plate to extend, and the hook squeezes the side of the seal ring into the groove inside the sealing device. Then, rotating the bushing drives the rectangular box and the hook to rotate, completely squeezing the side of the seal ring into the sealing device. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the telescopic component structure of this utility model; Figure 3 This is a schematic diagram of the bushing and transmission shaft structure of this utility model; In the diagram: 1. Rectangular box; 2. Telescopic assembly; 201. Rectangular plate sleeve; 202. Structural plate; 203. Structural block; 204. Lead screw; 205. Threaded groove; 206. Small helical gear; 207. Limiting block; 3. Box cover; 4. Bushing; 5. Hook; 6. Drive shaft; 7. Large helical gear; 8. Anti-slip sleeve; 9. Shaking plate. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] The sealing ring is hooked onto the edge using four sets of hooks, and then pulled out of the sealing device by the retracting structural plate, thus allowing the sealing ring to be removed from the sealing device. Figure 1-3 As shown, the device for facilitating the disassembly and assembly of a high-speed ship stern shaft seal according to this utility model includes a rectangular box 1 and a threaded groove 205. Telescopic components 2 are equidistantly arranged on the outer side of the rectangular box 1. The telescopic components 2 include a rectangular plate sleeve 201 fixed to the outer side of the rectangular box 1 by bolts. A structural plate 202 is sleeved on one end of the rectangular plate sleeve 201. A hook 5 is fixed to the end of the structural plate 202 away from the rectangular box 1 by bolts. A lead screw 204 is provided inside the rectangular plate sleeve 201. The top of the rectangular box 1 is fixed with a box cover 3 by bolts, and the top of the box cover 3 is fixed with a bushing 4 by a flange. The bushing 4 is fitted with a drive shaft 6 through a bearing.

[0017] When in use, rotating the drive shaft 6 pushes the structural plate 202 to extend and retract through the lead screw 204. When the hook 5 hooks the side of the sealing ring, the structural plate 202 retracts into the rectangular plate sleeve 201, pulling out the sealing ring. When installing the sealing ring, the extension and retraction of the structural plate 202 pushes the side of the sealing ring into the groove inside the sealing device through the hook 5.

[0018] For example, such as Figure 2 As shown, the present invention also includes a structural block 203 provided at one end of the rectangular plate sleeve 201, and the lead screw 204 is sleeved inside the structural block 203 through a bearing.

[0019] In use, the lead screw 204 is connected to the inside of the structural block 203 via a bearing, allowing it to rotate.

[0020] For example, such as Figure 2 As shown, the present invention also includes a large helical gear 7 fixedly sleeved at the bottom end of the transmission shaft 6 inside the rectangular box 1 by a flat key, and a small helical gear 206 fixedly sleeved at one end of the lead screw 204 inside the rectangular box 1 by a flat key, wherein the small helical gear 206 and the large helical gear 7 mesh with each other.

[0021] In use, the rotation of the drive shaft 6 drives the lead screw 204 to rotate through the large helical gear 7 and the small helical gear 206.

[0022] For example, such as Figure 2 As shown, the present invention also includes a threaded groove 205 at one end of the structural plate 202, and the end of the lead screw 204 away from the small helical gear 206 is located inside the threaded groove 205.

[0023] In use, the lead screw 204 rotates and pushes the structural plate 202 to extend and retract through the threaded groove 205.

[0024] For example, such as Figure 2 As shown, the present invention also includes, on both sides of the threaded groove 205 located inside the rectangular plate sleeve 201, limit blocks 207 are fixed by bolts.

[0025] When in use, the limiting block 207 is provided to prevent the structural plate 202 from falling out of the rectangular plate sleeve 201.

[0026] For example, such as Figure 1 , Figure 3 As shown, the present invention also includes an anti-slip sleeve 8 on the outer side of the bushing 4, and a rocker plate 9 fixedly fitted on the top end of the transmission shaft 6 by a flat key.

[0027] When in use, the anti-slip sleeve 8 makes it easy for people to hold the box cover 3, and the rocker plate 9 makes it easy for people to rotate the drive shaft 6.

[0028] When using this utility model, the operator holds the bushing 4 with one hand through the anti-slip sleeve 8, moves the rectangular box 1 to insert it into the sealing device, and holds the rocker plate 9 with the other hand to rotate the transmission shaft 6. When the drive shaft 6 rotates, it drives the lead screw 204 to rotate through the large helical gear 7 and the small helical gear 206. The rotation of the lead screw 204 pushes the structural plate 202 out through the threaded groove 205, so that the hook 5 contacts the side of the sealing ring. The moving rectangular box 1 hooks the side of the sealing ring through the hook 5. The reverse drive shaft 6 drives the structural plate 202 to retract, and the sealing ring is pulled out from the sealing device through the hook 5, so that the sealing ring can be removed from the sealing device. When the sealing ring needs to be installed in the sealing device, move the side of the sealing ring into the groove inside the sealing device. Similarly, rotate the drive shaft 6 to push the structure plate 202 out. Use the hook 5 to squeeze the side of the sealing ring into the groove inside the sealing device. Then rotate the bushing 4 to drive the rectangular box 1 and the hook 5 to rotate, so that the side of the sealing ring is completely squeezed into the sealing device.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for facilitating the installation and removal of a high-speed ship stern shaft seal, characterized in that, The rectangular box (1) includes a rectangular box body (1) and a threaded groove (205). Telescopic components (2) are equidistantly arranged on the outer side of the rectangular box body (1). The telescopic components (2) include a rectangular plate sleeve (201) fixed to the outer side of the rectangular box body (1) by bolts. A structural plate (202) is sleeved on one end of the rectangular plate sleeve (201). A hook (5) is fixed on the end of the structural plate (202) away from the rectangular box body (1) by bolts. A threaded rod (204) is provided inside the rectangular plate sleeve (201). The top of the rectangular box (1) is fixed with a box cover (3) by bolts, and the top of the box cover (3) is fixed with a bushing (4) by a flange. The bushing (4) is fitted with a drive shaft (6) through a bearing.

2. The device for facilitating the disassembly and assembly of a high-speed ship stern shaft seal according to claim 1, characterized in that, A structural block (203) is provided at one end of the rectangular plate sleeve (201), and the lead screw (204) is sleeved inside the structural block (203) through a bearing.

3. The device for facilitating the disassembly and assembly of a high-speed ship stern shaft seal according to claim 1, characterized in that, The transmission shaft (6) is located inside the rectangular box (1) and a large helical gear (7) is fixedly sleeved on the bottom end by a flat key. The lead screw (204) is located inside the rectangular box (1) and a small helical gear (206) is fixedly sleeved on the end by a flat key. The small helical gear (206) and the large helical gear (7) mesh with each other.

4. The device for facilitating the disassembly and assembly of a high-speed ship stern shaft seal according to claim 1, characterized in that, The structural plate (202) has a threaded groove (205) at one end, and the end of the lead screw (204) away from the small helical gear (206) is located inside the threaded groove (205).

5. The device for facilitating the disassembly and assembly of a high-speed ship stern shaft seal according to claim 4, characterized in that, The threaded groove (205) is located on both sides inside the rectangular plate sleeve (201) and is fixed with limit blocks (207) by bolts.

6. The device for facilitating the disassembly and assembly of a high-speed ship stern shaft seal according to claim 1, characterized in that, The bushing (4) is fitted with an anti-slip sleeve (8) on its outer side, and the top of the drive shaft (6) is fitted with a rocker plate (9) by means of a flat key.

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