Sealing structure of underwater propeller

Abstract

The utility model discloses an underwater propeller sealing structure which comprises an underwater propeller main shaft and a sealing assembly. The sealing assembly comprises an upper sealing kit arranged outside the underwater propeller main shaft in a sleeving mode, a middle sealing kit arranged on the lower side of the interior of the upper sealing kit, and a lower sealing kit fixed to the lower end of the middle sealing kit and installed at the lower end of the upper sealing kit. The lower sealing ring is arranged on the upper side of the interior of the middle sealing kit, the middle sealing ring is arranged at the upper end of the lower sealing ring, through holes attached to the outer wall of the main shaft of the underwater propeller are formed in the middle of the lower sealing ring and the middle sealing ring, and an annular thread groove is formed in the outer side of the middle of the lower end of the upper sealing kit. According to the sealing structure of the underwater propeller, the lower sealing kit is installed on the upper sealing kit in a threaded mode through the threaded circular ring plate arranged on the lower sealing kit, and compared with an existing mode that screws are installed and fixed, the sealing structure of the underwater propeller has the advantage of being convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater thruster sealing, and particularly relates to an underwater thruster sealing structure. Background Technique

[0002] An underwater thruster is a key component of underwater industrial equipment and entertainment equipment, and its performance directly determines the performance and effect of the whole machine. The main components of the thruster include a motor, a propeller and a duct. As a key component, the cost of the thruster also accounts for a large proportion in the whole machine. The propeller has a simple structure, reliable operation and high efficiency, and is the main thruster of boats and ships. Modern boat and ship propellers mostly adopt structural forms such as a large disk area ratio, moderate inclination, radial unequal pitch and more blades to reduce the possible cavitation, erosion, noise and excessive exciting force when working in the uneven wake flow field at the stern. The air propeller used for a fully air-cushioned vehicle is similar to a fixed pitch propeller, and uses the reaction force of air to push the boat forward.

[0003] The authorized announcement number CN211009885U discloses an underwater thruster main shaft sealing structure, which includes a lower sealing kit, a lower sealing ring, a middle sealing kit, a middle sealing ring, an upper sealing kit, an underwater thruster main shaft and a sealing grease end cover. The lower sealing kit is sleeved on the surface of the underwater thruster main shaft. An upper mounting groove for mounting the lower sealing ring is opened in the upper part inside the lower sealing kit. The lower sealing ring is sleeved on the surface of the underwater thruster main shaft, and the lower sealing ring is installed inside the lower mounting groove. The upper part of the lower sealing kit is provided with a middle sealing kit sleeved on the surface of the underwater thruster main shaft. An intermediate mounting groove for mounting the intermediate sealing ring is opened inside the intermediate sealing kit. The intermediate sealing ring is sleeved on the surface of the underwater thruster main shaft. The utility model has a simple structure, good sealing performance, long service life, convenient disassembly and assembly, and is convenient for later replacement of parts.

[0004] The lower sealing kit of the underwater thruster main shaft sealing structure is fixedly connected to the upper sealing kit by screws. When disassembling and assembling the two later, external tools are needed to remove the screws, and the disassembly and assembly are relatively troublesome. For this reason, we propose an underwater thruster sealing structure. Content of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the utility model.

[0006] In view of the above and / or problems existing in the existing underwater thruster sealing structures, the present utility model is proposed.

[0007] Therefore, the purpose of the present utility model is to provide an underwater thruster sealing structure. The lower sealing kit is threadedly installed on the upper sealing kit through a threaded circular ring plate provided on the lower sealing kit. Compared with the existing screw installation and fixation, the present utility model has the advantage of being convenient for disassembly and assembly.

[0008] To solve the above technical problems, according to one aspect of the present utility model, the following technical solutions are provided:

[0009] An underwater thruster sealing structure, which includes:

[0010] The main shaft of the underwater thruster;

[0011] A sealing assembly, including an upper sealing kit sleeved outside the main shaft of the underwater thruster, a middle sealing kit provided on the lower side inside the upper sealing kit, a lower sealing kit fixed to the lower end of the middle sealing kit and installed at the lower end of the upper sealing kit, a lower sealing ring provided on the upper side inside the middle sealing kit, and a middle sealing ring provided at the upper end of the lower sealing ring. Through holes that fit the outer wall of the main shaft of the underwater thruster are provided in the middle of the lower sealing ring and the middle sealing ring. A circular ring threaded groove is provided on the outer side of the middle of the lower end of the upper sealing kit. A threaded circular ring plate is fixed to the outer side of the middle of the upper end of the lower sealing kit. The lower sealing kit is threadedly connected to the upper sealing kit. An oil storage chamber is provided on the upper side inside the upper sealing kit. A sealing grease end cover is installed at the middle of the upper end of the upper sealing kit. An oil inlet hole is provided on the sealing grease end cover, and a rubber plug is installed in the oil inlet hole;

[0012] Preferably, internal threads are provided on the upper side of the inner wall of the hole of the upper sealing kit, and the sealing grease end cover is threadedly connected to the upper sealing kit. The sealing grease end cover threadedly installed at the upper end of the upper sealing kit is convenient for the operator to manually rotate the sealing grease end cover to remove it later, which is convenient for its disassembly and assembly. Compared with the existing screw installation, the present utility model has the advantage of being convenient for disassembly and assembly.

[0013] Preferably, the oil inlet hole is a threaded hole, and the rubber plug is threadedly installed in the oil inlet hole. The rubber plug threadedly installed in the oil inlet hole is convenient for the operator to remove the rubber plug later, so as to supplement sealing grease into the oil storage chamber through the oil inlet hole.

[0014] Preferably, a plurality of anti-slip grooves are provided on the outer wall of the lower sealing kit, and the plurality of anti-slip grooves are evenly and equidistantly provided on the outer wall of the lower sealing kit. The plurality of anti-slip grooves evenly and equidistantly provided on the outer wall of the lower sealing kit are convenient for the assembler to screw the lower sealing kit, and further convenient for the disassembly and assembly of the lower sealing kit.

[0015] Preferably, a sealing gasket is provided at the upper end of the lower sealing kit, and the upper end of the sealing gasket is attached to the lower end of the upper sealing kit. The sealing gasket provided at the upper end of the lower sealing kit is attached to the upper sealing kit, which plays a role in sealing the gap between the lower sealing kit and the upper sealing kit, further enhancing the sealing performance of the device.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] (1) The lower sealing kit is threadedly installed on the upper sealing kit through the threaded circular ring plate provided on the lower sealing kit. Compared with the existing screw installation and fixation, the present utility model has the advantages of convenient disassembly and assembly.

[0018] (2) The sealing gasket provided at the upper end of the lower sealing kit is attached to the upper sealing kit, which plays a role in sealing the gap between the lower sealing kit and the upper sealing kit, further enhancing the sealing performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the present utility model will be described in detail below with reference to the drawings and specific embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0021] Figure 2 is an exploded structural schematic diagram of the present utility model;

[0022] Figure 3 is a three-dimensional structural schematic diagram of the upper sealing kit of the present utility model;

[0023] Figure 4 is the present utility model Figure 2 partial enlarged structural schematic diagram of part A in;

[0024] In the figure: 100, underwater thruster main shaft; 200, sealing assembly; 210, upper sealing kit; 211, circular ring thread groove; 212, oil storage chamber; 213, sealing grease end cap; 214, oil inlet hole; 215, rubber plug; 216, internal thread; 220, middle sealing kit; 230, lower sealing kit; 231, threaded circular ring plate; 232, anti-slip groove; 233, sealing gasket; 240, lower sealing ring; 250, middle sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0026] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0027] In order to make the purpose, technical solution, and advantages of the present utility model clearer, the following will further describe in detail the embodiments of the present utility model with reference to the accompanying drawings.

[0028] The present utility model provides a sealing structure for an underwater thruster. The lower sealing kit is threadedly installed on the upper sealing kit through a threaded circular ring plate provided on the lower sealing kit. Compared with the existing screw installation and fixation, the present utility model has the advantage of being convenient for disassembly and assembly.

[0029] Figures 1 - 4 Shown is a schematic structural diagram of an embodiment of a sealing structure for an underwater thruster of the present utility model. Please refer to Figures 1 - 4 In this embodiment, a sealing structure for an underwater thruster, its main part includes an underwater thruster main shaft 100 and a sealing assembly 200.

[0030] Underwater thruster main shaft 100.

[0031] The sealing assembly 200 includes an upper sealing kit 210 sleeved outside the main shaft 100 of the underwater thruster, a middle sealing kit 220 arranged on the lower side inside the upper sealing kit 210, a lower sealing kit 230 fixed to the lower end of the middle sealing kit 220 and installed at the lower end of the upper sealing kit 210, a lower sealing ring 240 arranged on the upper side inside the middle sealing kit 220, and a middle sealing ring 250 arranged at the upper end of the lower sealing ring 240. Through holes that fit the outer wall of the main shaft 100 of the underwater thruster are provided in the middle of the lower sealing ring 240 and the middle sealing ring 250. An annular thread groove 211 is provided on the outer side of the middle part of the lower end of the upper sealing kit 210. A threaded circular ring plate 231 is fixed to the outer side of the middle part of the upper end of the lower sealing kit 230. The lower sealing kit 230 is threadedly connected to the upper sealing kit 210. An oil storage chamber 212 is provided on the upper side inside the upper sealing kit 210. A sealing grease end cover 213 is installed at the middle part of the upper end of the upper sealing kit 210. An oil inlet hole 214 is provided on the sealing grease end cover 213. A rubber plug 215 is installed in the oil inlet hole 214. Preferably, in this embodiment, an internal thread 216 is provided on the upper side of the inner wall of the hole of the upper sealing kit 210. The sealing grease end cover 213 is threadedly connected to the upper sealing kit 210. The sealing grease end cover 213 threadedly installed at the upper end of the upper sealing kit 210 is convenient for the operator to manually rotate the sealing grease end cover 213 to remove it later, which is convenient for disassembly and assembly. Compared with the existing screw installation, the utility model has the advantage of convenient disassembly and assembly. The oil inlet hole 214 is a threaded hole, and the rubber plug 215 is threadedly installed in the oil inlet hole 214. The rubber plug 215 threadedly installed in the oil inlet hole 214 is convenient for the operator to remove the rubber plug 215 later, so as to supplement sealing grease into the oil storage chamber 212 through the oil inlet hole 214. A plurality of anti-slip grooves 232 are provided on the outer wall of the lower sealing kit 230. The plurality of anti-slip grooves 232 are evenly and equidistantly arranged on the outer wall of the lower sealing kit 230. The plurality of anti-slip grooves 232 evenly and equidistantly arranged on the outer wall of the lower sealing kit 230 are convenient for the assembler to twist the lower sealing kit 230, and further convenient for disassembly and assembly of the lower sealing kit 230. A sealing gasket 233 is provided at the upper end of the lower sealing kit 230. The upper end of the sealing gasket 233 is in contact with the lower end of the upper sealing kit 210. The sealing gasket 233 provided at the upper end of the lower sealing kit 230 is in contact with the upper sealing kit 210, which plays a role in sealing the gap between the lower sealing kit 230 and the upper sealing kit 210, and further enhances the sealing performance of the device.

[0032] Combine Figures 1 - 4, A sealing structure for an underwater thruster in this embodiment is specifically used as follows: The structure of the present utility model is simple, has good sealing performance, long service life, and is convenient for disassembly and assembly. When it is necessary to disassemble, assemble and replace the internal components, the operator only needs to turn the anti-slip groove 232 outside the lower sealing kit 230 to turn the lower sealing kit 230 and the threaded ring plate 231, and screw out the threaded ring plate 231 from the ring threaded groove 211 of the upper sealing kit 210, so as to complete the separation of the lower sealing kit 230 and the upper sealing kit 210. Compared with the existing screw installation and fixation, the present utility model has the advantage of being convenient for disassembly and assembly without the need to rely on external tools.

[0033] Although the present utility model has been described with reference to the embodiments above, various improvements can be made to it and its components can be replaced with equivalents without departing from the scope of the present utility model. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present utility model can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the consideration of saving space and resources. Therefore, the present utility model is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An underwater thruster sealing structure, characterized in that, Comprising: The underwater thruster main shaft (100); A sealing assembly (200), including an upper sealing kit (210) sleeved outside the underwater thruster main shaft (100), a middle sealing kit (220) arranged on the lower side inside the upper sealing kit (210), a lower sealing kit (230) fixed to the lower end of the middle sealing kit (220) and installed at the lower end of the upper sealing kit (210), a lower sealing ring (240) arranged on the upper side inside the middle sealing kit (220), and a middle sealing ring (250) arranged at the upper end of the lower sealing ring (240). Through holes that fit the outer wall of the underwater thruster main shaft (100) are formed in the middle of the lower sealing ring (240) and the middle sealing ring (250). An annular thread groove (211) is formed on the outer side of the middle part of the lower end of the upper sealing kit (210). A threaded circular ring plate (231) is fixed to the outer side of the middle part of the upper end of the lower sealing kit (230). The lower sealing kit (230) is threadedly connected to the upper sealing kit (210). An oil storage chamber (212) is formed on the upper side inside the upper sealing kit (210). A sealing grease end cover (213) is installed at the middle part of the upper end of the upper sealing kit (210). An oil inlet hole (214) is formed in the sealing grease end cover (213). A rubber plug (215) is installed in the oil inlet hole (214).

2. The underwater thruster sealing structure according to claim 1, characterized in that Internal threads (216) are provided on the upper side of the inner wall of the hole of the upper sealing kit (210). The sealing grease end cover (213) is threadedly connected to the upper sealing kit (210).

3. The underwater thruster sealing structure according to claim 1, characterized in that, The oil inlet hole (214) is a threaded hole. The rubber plug (215) is threadedly installed in the oil inlet hole (214).

4. An underwater thruster sealing structure according to claim 1, characterized in that, A plurality of anti-slip grooves (232) are formed on the outer wall of the lower sealing kit (230). The plurality of anti-slip grooves (232) are evenly and equidistantly formed on the outer wall of the lower sealing kit (230).

5. An underwater thruster sealing structure according to claim 1, characterized in that, A sealing gasket (233) is arranged at the upper end of the lower sealing kit (230). The upper end of the sealing gasket (233) is in contact with the lower end of the upper sealing kit (210).

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