Propeller structure
By setting up a planetary mechanism inside the propeller, the problem of the propeller speed in traditional motor propulsion systems is solved, direct thrust transmission without gearbox is achieved, the propeller shaft system layout is optimized, vibration and wear are reduced, and the system efficiency and reliability are improved.
Patent Information
- Application Number
- CN202422302022.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In traditional motor propulsion systems, the propeller speed needs to be reduced through the gearbox, resulting in problems such as bearing wear, cyclonic vibration and torsional vibration, and additional gearbox structure is required.
The planetary mechanism is installed inside the propeller. Through the reverse thrust bearing and the forward thrust bearing, the propeller thrust force is directly transmitted to the hull, canceling the additional gearbox, and the transmission shaft system only transmits torque.
The propeller shaft system layout is optimized, which reduces vibration and wear, simplifies maintenance, and improves efficiency and reliability.
Smart Images
Figure CN223200269U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ship propulsion, in particular to a propeller structure. Background Art
[0002] With the continuous development of green ship technologies, electric motor propulsion has become increasingly popular in various types of ships due to its superior propulsion performance, environmental performance, and economic efficiency. Furthermore, compared to diesel engines, electric motors can achieve reverse rotation, making them widely used. Since lower propeller speeds increase efficiency, propulsion systems with traditional shafting arrangements and current electric motor propulsion still require a gearbox to reduce the output speed of the prime mover to achieve the appropriate propeller speed. However, the propeller force typically needs to be transmitted to the gearbox via a very long low-speed shaft, which can easily lead to improper bearing alignment, whirling vibration, and torsional vibration. Utility Model Content
[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a propeller structure, which can directly transmit the propeller thrust to the hull by arranging a planetary mechanism inside the propeller structure.
[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:
[0005] A propeller structure includes a propeller and a fixed shaft, wherein the front end of the fixed shaft is rigidly connected to the hull, and the rear end of the fixed shaft is connected to the propeller. The structure also includes a transmission shaft, a planetary carrier, a planetary gear and a sun gear. The fixed shaft is hollow, the propeller is hollow, the planetary carrier, the planetary gear and the sun gear are arranged in the propeller, the front end of the transmission shaft is connected to the prime mover, the rear end of the transmission shaft passes through the fixed shaft and extends into the propeller, the sun gear is mounted on the transmission shaft, an inner gear ring is provided in the propeller, the planetary gears are meshed between the sun gear and the inner gear ring, and the planetary gears are fixed to the planetary carrier.
[0006] Preferably, the planet carrier is hinged or fixedly connected to the rear end of the fixed shaft, and the propeller and the planet carrier are connected via a reverse thrust bearing.
[0007] Preferably, the propeller and the fixed shaft are connected via a forward thrust bearing.
[0008] Preferably, the propeller includes a propeller cap, a blade body and blades, the propeller cap is mounted on the rear end of the blade body by bolts, the blade body is hollow, the inner ring gear is arranged on the inner wall of the blade body, and the blades are arranged on the outer wall of the blade body.
[0009] Preferably, a sealing device is provided at the front end of the blade hub body, the sealing device can rotate along with the blade hub body, and the fixed shaft passes through the sealing device and extends into the blade hub body.
[0010] Preferably, it further comprises a sealing bushing which is sleeved on the fixed shaft and installed between the sealing device and the fixed shaft.
[0011] Preferably, a radial bearing is provided at the rear end of the transmission shaft.
[0012] Preferably, a retaining ring is provided at the rear end of the transmission shaft, and the retaining ring is arranged behind the radial bearing.
[0013] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects: the present invention provides a planetary mechanism inside the propeller, thereby making the propeller have a built-in speed reduction mechanism, without the need for an additional gear box; and, by providing a reverse thrust bearing and a forward thrust bearing, the thrust generated by the propeller is directly borne by the hull through the fixed shaft, and the transmission shaft system only transmits torque, thereby optimizing the propeller shaft system layout structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural diagram of the present utility model.
[0015] Reference numerals:
[0016] 1. Propeller cap; 2. Bolts; 3. Propeller hub; 4. Propeller blades; 5. Fixed shaft; 6. Reverse thrust bearing; 7. Forward thrust bearing; 8. Sealing device; 9. Sealing bushing; 10. Drive shaft; 11. Retaining ring; 12. Radial bearing; 13. Planet carrier; 14. Planet gear; 15. Sun gear; 16. Ring gear. DETAILED DESCRIPTION
[0017] 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.
[0018] 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.
[0019] In the description of the present invention, unless otherwise specified, “plurality” means two or more than two, unless otherwise clearly defined.
[0020] 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.
[0021] 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.
[0022] In order to explain the present application more clearly, in the present invention, when the propeller structure is installed on the hull, the direction in which the hull moves forward is the front, and vice versa is the rear.
[0023] like Figure 1 A propeller structure shown includes a propeller and a fixed shaft 5. The front end of the fixed shaft 5 is rigidly connected to the hull and does not rotate relative to the hull, thereby providing support for the entire device and transmitting the thrust generated by the propeller to the hull. The rear end of the fixed shaft 5 is connected to the propeller, and is characterized in that it also includes a transmission shaft 10, a planetary carrier 13, planetary gears 14, and a sun gear 15. The fixed shaft 5 is hollow, the propeller is hollow, the planetary carrier 13, planetary gears 14, and sun gear 15 are arranged in the propeller, the front end of the transmission shaft 10 is connected to the prime mover, the rear end of the transmission shaft 10 passes through the fixed shaft 5 and extends into the propeller, the sun gear 15 is mounted on the transmission shaft 10, and an internal gear ring 16 is provided in the propeller. The planetary gears 14 are meshed between the sun gear 15 and the internal gear ring 16, and the planetary gears 14 are fixed to the planetary carrier 13.
[0024] Thus, in the present invention, a planetary mechanism is provided inside the propeller, so that the propeller has its own deceleration mechanism, and there is no need to provide an additional gearbox to decelerate the speed of the prime mover. Moreover, the planetary mechanism is integrated into the propeller, the axial distance is small, and when in use, the whole itself is immersed in water, and there is no need to consider the cooling problem.
[0025] In this solution, planet carrier 13 can be hinged or fixedly connected to the rear end of fixed shaft 5, depending on the required speed ratio. This allows the planet carrier 13 to rotate relative to the fixed shaft 5 or prevent relative rotation. The propeller and planet carrier 13 are connected via a reverse thrust bearing 6. In this way, the reverse thrust generated by the blades 4 is transmitted to the fixed shaft 5 through the reverse thrust bearing 6 and the planet carrier 13. The propeller and fixed shaft 5 are connected via a forward thrust bearing 7. In this way, the forward thrust generated by the blades 4 is transmitted to the fixed shaft 5 through the forward thrust bearing 7.
[0026] In this way, by providing the reverse thrust bearing 6 and the forward thrust bearing 7, the thrust generated by the propeller is directly borne by the hull through the fixed shaft 5, and the transmission shaft system only transmits torque, thereby optimizing the propeller shaft system layout structure.
[0027] In the present invention, the propeller includes a propeller cap 1, a blade body 3 and a blade 4. The propeller cap 1 is installed at the rear end of the blade body 3 by means of a bolt 2. The blade body 3 is hollow, and the propeller cap 1 closes the rear end of the blade body 3. The inner ring gear 16 is arranged on the inner side wall of the blade body 3. Specifically, the inner ring gear 16 is integrally formed on the inner side wall of the blade body 3, the planetary gear 13 is engaged with the inner ring gear 16, and the blade 4 is arranged on the outer side wall of the blade body 3.
[0028] A sealing device 8 is provided at the front end of the hub body 3 . The sealing device 8 can rotate along with the hub body 3 . The fixed shaft 5 passes through the sealing device 8 and extends into the hub body 3 .
[0029] In order to protect the fixed shaft 5 from wear and corrosion, a sealing bushing 9 is also included. The sealing bushing 9 is sleeved on the fixed shaft 5 and installed between the sealing device 8 and the fixed shaft 5.
[0030] A radial bearing 12 is provided at the rear end of the transmission shaft 10, which can reduce the vibration generated when the gears are engaged. A retaining ring 11 is provided at the rear end of the transmission shaft 10, and the retaining ring 11 is arranged behind the radial bearing 12, which can prevent the radial bearing 12 from axial movement.
[0031] The transmission shaft 10 receives and transmits the speed and torque generated by the prime mover. When the transmission shaft 10 rotates, it drives the sun gear 15 installed thereon. When the sun gear 15 rotates, the moving planetary gears 14 and the planetary carrier 13 rotate. The planetary gears 14 act on the inner ring gear 16 of the hub body 3 to drive the hub body 3 to rotate, thereby driving the blades 4 to rotate.
[0032] Moreover, the propeller structure can be disassembled from the tail during maintenance, making maintenance convenient and quick.
[0033] 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.
[0034] 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 propeller structure, comprising a propeller and a fixed shaft (5), wherein the front end of the fixed shaft (5) is rigidly connected to the hull, and the rear end of the fixed shaft (5) is connected to the propeller, characterized in that: The invention also includes a transmission shaft (10), a planetary carrier (13), a planetary gear (14) and a sun gear (15); the fixed shaft (5) is hollow, the propeller is hollow, the planetary carrier (13), the planetary gear (14) and the sun gear (15) are arranged in the propeller, the front end of the transmission shaft (10) is connected to the prime mover, the rear end of the transmission shaft (10) passes through the fixed shaft (5) and extends into the propeller, the sun gear (15) is installed on the transmission shaft (10), an inner gear ring (16) is provided in the propeller, the planetary gear (14) is meshed between the sun gear (15) and the inner gear ring (16), and the planetary gear (14) is fixed on the planetary carrier (13).
2. A propeller structure according to claim 1, characterized in that: The planet carrier (13) is hinged or fixedly connected to the rear end of the fixed shaft (5), and the propeller and the planet carrier (13) are connected via a reverse thrust bearing (6).
3. A propeller structure according to claim 1, characterized in that: The propeller and the fixed shaft (5) are connected via a forward thrust bearing (7).
4. A propeller structure according to claim 1, characterized in that: The propeller comprises a propeller cap (1), a blade body (3) and a blade (4). The propeller cap (1) is mounted on the rear end of the blade body (3) through a bolt (2). The blade body (3) is hollow. The inner gear ring (16) is arranged on the inner side wall of the blade body (3). The blade (4) is arranged on the outer side wall of the blade body (3).
5. A propeller structure according to claim 4, characterized in that: A sealing device (8) is provided at the front end of the blade body (3). The sealing device (8) can rotate along with the blade body (3). The fixed shaft (5) passes through the sealing device (8) and extends into the blade body (3).
6. A propeller structure according to claim 5, characterized in that: It also includes a sealing bushing (9), which is sleeved on the fixed shaft (5) and installed between the sealing device (8) and the fixed shaft (5).
7. The propeller structure according to claim 1, characterized in that: A radial bearing (12) is provided at the rear end of the transmission shaft (10).
8. A propeller structure according to claim 7, characterized in that: The rear end of the transmission shaft (10) is provided with a retaining ring (11), which is arranged behind the radial bearing (12).