High-speed shaft system for water jet propulsion

Abstract

The utility model discloses a high-speed shaft system for water jet propulsion. The high-speed shaft system comprises a high-elasticity coupling, a marine gearbox, a detachable hydraulic coupling, an intermediate shaft, an intermediate bearing, a diaphragm coupling group and a water jet propulsion device, the marine gearbox is connected with the marine diesel engine through the high-elasticity coupling, one end of the intermediate shaft is connected with the marine gearbox through the detachable hydraulic coupling, the other end of the intermediate shaft is connected with the water spraying propulsion device through the diaphragm coupling set, and the intermediate bearing is installed on the intermediate shaft. Axial and angular deviations caused by a ship body and installation are compensated through the diaphragm coupling set and the middle bearing, the middle shaft is arranged to be a hollow shaft, the rigidity of a shaft system can be reduced, the middle shaft can better bear high alternating loads, meanwhile, the weight of the middle shaft is reduced, abrasion of a rolling bearing in the marine gearbox and the middle bearing is relieved, and the service life of the marine gearbox is prolonged. And the service lives of the intermediate shaft and related bearings are prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ship propulsion systems, in particular to a high-speed shaft system for water jet propulsion. Background Art

[0002] A ship's shafting is a crucial component of its propulsion system and crucial for its safe operation. It transmits power generated by the ship's diesel engine to the propellers and, in turn, to the hull, overcoming resistance. Therefore, shafting alignment and installation accuracy and reliability are particularly crucial. For high-speed vessels, shafting must exhibit good deformation adaptability and sufficient strength. Furthermore, existing steel shafting systems are heavy and offer limited compensation capabilities for specialized vessels with limited engine room space, high weight requirements, and high shaft speeds. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of the present utility model is to provide a high-speed shaft system for water jet propulsion, which has a high elastic coupling and sets the intermediate shaft as a hollow shaft, has higher torsional resistance, simple processing, lighter overall weight, and the ability to compensate for axial and angular deviations.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A high-speed shaft system for water jet propulsion comprises a highly elastic coupling, a marine gearbox, a detachable hydraulic coupling, an intermediate shaft, an intermediate bearing, a diaphragm coupling assembly and a water jet propulsion device; the marine gearbox is connected to a marine diesel engine via a highly elastic coupling, one end of the intermediate shaft is connected to the marine gearbox via a detachable hydraulic coupling, the other end of the intermediate shaft is connected to the water jet propulsion device via a diaphragm coupling assembly, and the intermediate bearing is mounted on the intermediate shaft.

[0006] Preferably, the intermediate bearing is a spherical roller bearing.

[0007] Preferably, the diaphragm coupling set is a double diaphragm coupling set.

[0008] Preferably, the intermediate shaft is a hollow shaft.

[0009] Preferably, the ship further comprises a bulkhead stuffing box, the bulkhead stuffing box being mounted on the hull bulkhead, and the intermediate shaft passing through the bulkhead stuffing box;

[0010] Preferably, the compartment stuffing box is located between the intermediate bearing and the diaphragm coupling assembly.

[0011] Preferably, the diaphragm coupling assembly is fixed between the water jet propulsion device and the intermediate shaft by means of hinged bolts.

[0012] Preferably, the detachable hydraulic coupling is fixed between the intermediate shaft and the marine gearbox by twisted bolts.

[0013] Due to the adoption of the above technical solution, the present invention has the following beneficial effects: in the present invention, the axial and angular deviations caused by the hull and the installation are compensated by the diaphragm coupling group and the intermediate bearing. By setting the intermediate shaft as a hollow shaft, the rigidity of the shaft system can be reduced, so that the intermediate shaft can better withstand higher alternating loads, while reducing the weight of the intermediate shaft, reducing the wear of the rolling bearings and the intermediate bearings in the marine gearbox, and extending the service life of the intermediate shaft and related bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] Figure numerals: 1. Highly elastic coupling; 2. Marine gearbox; 3. Removable hydraulic coupling; 4. Intermediate shaft; 5. Intermediate bearing; 6. Bulkhead stuffing box; 7. Diaphragm coupling assembly; 8. Water jet propulsion device. DETAILED DESCRIPTION

[0016] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0018] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0019] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0020] like Figure 1 The high-speed shafting system shown in the figure for water jet propulsion includes a highly elastic coupling 1, a marine gearbox 2, a detachable hydraulic coupling 3, an intermediate shaft 4, an intermediate bearing 5, a diaphragm coupling assembly 7 and a water jet propulsion device 8; the marine gearbox 2 is connected to the ship diesel engine via the highly elastic coupling 1, one end of the intermediate shaft 4 is connected to the marine gearbox 2 via the detachable hydraulic coupling 3, and the other end of the intermediate shaft 4 is connected to the water jet propulsion device 8 via the diaphragm coupling assembly 7, and the intermediate bearing 5 is mounted on the intermediate shaft 4.

[0021] In this way, the diaphragm coupling assembly 7 and intermediate bearing 4 compensate for axial and angular deviations caused by the hull and installation. The highly elastic coupling 1 between the marine gearbox 2 and the marine diesel engine absorbs vibrations and shocks caused by the marine diesel engine. This solution offers a rational shafting structure, ease of use, reliability, and high system operational stability.

[0022] In the present invention, the intermediate bearing 5 is a spherical roller bearing. In this way, the center bearing 5 is installed on the intermediate shaft 4, which can not only play a supporting role, but also compensate for the angular error caused by installation error or deflection of the intermediate shaft 5.

[0023] In the present invention, the diaphragm coupling assembly 7 is a double-diaphragm coupling assembly, which compensates for axial and angular deviations that may be caused by the hull and the installation through the elastic deformation of the diaphragms.

[0024] In order to reduce the weight of the intermediate shaft 4, the intermediate shaft 4 is a hollow shaft, which reduces the rigidity of the shaft system and enables the intermediate shaft 4 to better withstand higher alternating loads. In addition, the wear of the rolling bearings and the intermediate bearing 5 on the marine gearbox 2 is reduced, thereby extending the service life of the intermediate shaft 4 and related bearings.

[0025] The present invention further comprises a bulkhead stuffing box 6 which is mounted on the bulkhead of the hull, and the intermediate shaft 4 passes through the bulkhead stuffing box 6 to achieve a sealing effect.

[0026] like Figure 1As shown, the bulkhead stuffing box 6 is located between the intermediate bearing 5 and the diaphragm coupling assembly 7 .

[0027] The diaphragm coupling assembly 7 is fixed between the water jet propulsion device 8 and the intermediate shaft 4 by means of twisted bolts, and the detachable hydraulic coupling 3 is fixed between the intermediate shaft 4 and the marine gearbox 2 by twisted bolts. The twisted bolts are high in strength and can ensure the connection strength and safety.

[0028] All features described in the description, the appended claims and the drawings are important features of the present invention, whether alone or in any combination.

[0029] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace, modify, delete some features, add features or re-combine features to form a technical solution in the above embodiments without departing from the principles and purpose of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the innovative principles of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-speed shaft system for water jet propulsion, characterized in that: The invention comprises a highly elastic coupling (1), a marine gearbox (2), a detachable hydraulic coupling (3), an intermediate shaft (4), an intermediate bearing (5), a diaphragm coupling group (7) and a water jet propulsion device (8); the marine gearbox (2) is connected to the marine diesel engine via the highly elastic coupling (1); one end of the intermediate shaft (4) is connected to the marine gearbox (2) via the detachable hydraulic coupling (3); the other end of the intermediate shaft (4) is connected to the water jet propulsion device (8) via the diaphragm coupling group (7); and the intermediate bearing (5) is mounted on the intermediate shaft (4).

2. A high-speed shaft system for water jet propulsion according to claim 1, characterized in that: The intermediate bearing (5) is a spherical roller bearing.

3. The high-speed shaft system for water jet propulsion according to claim 1, characterized in that: The diaphragm coupling group (7) is a double diaphragm coupling group.

4. A high-speed shaft system for water jet propulsion according to claim 1, characterized in that: The intermediate shaft (4) is a hollow shaft.

5. The high-speed shaft system for water jet propulsion according to claim 1, characterized in that: The invention also comprises a bulkhead stuffing box (6), which is installed on the bulkhead of the hull, and the intermediate shaft (4) passes through the bulkhead stuffing box (6).

6. A high-speed shaft system for water jet propulsion according to claim 5, characterized in that: The compartment stuffing box (6) is located between the intermediate bearing (5) and the diaphragm coupling assembly (7).

7. The high-speed shaft system for water jet propulsion according to claim 1, characterized in that: The diaphragm coupling assembly (7) is fixed between the water jet propulsion device (8) and the intermediate shaft (4) by means of hinged bolts.

8. The high-speed shaft system for water jet propulsion according to claim 1, characterized in that: The detachable hydraulic coupling (3) is fixed between the intermediate shaft (4) and the marine gear box (2) by twisted bolts.

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