Anti-winding propeller structure
By setting gaps and reverse threads in the tug propeller structure, the floating object is squeezed and rotated out in reverse using the rotation force of the propeller thruster hub, the problem that the prior art cannot automatically discharge the already entangled floating object, and the effective anti-winding and sealing effect is achieved.
Patent Information
- Application Number
- CN202421101013.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The existing tug propeller shaft anti-winding technology can only prevent floating objects from wrapping, and cannot automatically discharge the entangled floating objects.
An anti-winding propeller structure is designed. By setting a gap between the open inner wall of the lower gearbox housing and the side wall of the propeller propeller hub, and setting a reverse thread at the rear end of the propeller hub, the floating object wrapped in the gap is reversely squeezed and rotated out with the help of the rotation force of the propeller hub.
Effectively prevent floating objects from wrapping around the propeller propeller shaft, ensure effective sealing of the seal, avoid water inlet inside the lower gearbox shell, reduce seawater corrosion, and be low in cost.
Smart Images
Figure CN222646251U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tugboat propellers, in particular to an anti-winding propeller structure. Background Art
[0002] When tugboat propellers are operating at sea, they may encounter various floating objects, such as fishing nets, ropes, plastic waste, etc. The propeller shaft is a key component connecting the power unit and the propeller. Since the propeller splicing requires reserved capacity, there will be a certain gap at the interface between the propeller hub and the propeller shaft. Therefore, once the above-mentioned floating objects come into contact with the propeller, they may be drawn into the gap at the interface between the propeller hub and the propeller shaft, and then entangled on the propeller shaft, causing damage to the water seal at the tail end of the propeller shaft, affecting the sealing of the propeller shaft, and also causing obstruction of the propeller shaft operation, abnormal speed, increased vibration, and even causing serious mechanical failures such as shaft breakage and bearing damage.
[0003] At present, the following devices and working methods have appeared in the prior art to prevent propeller shaft entanglement: 1. Installing a rotating tool, cutting system or electromagnetic repulsion device near the propeller, which can actively cut off or push away the entanglement when the propeller is running; 2. Using a propeller design with a special shape or structure, such as anti-entanglement blades or cutting blades, to reduce the adhesion of debris or directly cut off the entanglement; 3. Using an intelligent monitoring and control system, using sensors to monitor the propeller status, and automatically triggering the anti-entanglement mechanism or adjusting the propulsion system operating parameters to reduce the risk of entanglement when entanglement is detected; 4. Using innovative propulsion system designs, such as variable pitch, multi-directional propulsion or shaftless propulsion technology, to fundamentally change the way the propeller interacts with the environment and reduce the possibility of entanglement.
[0004] However, the existing tugboat propeller shaft anti-entanglement technology can only prevent floating objects from being entangled in the propeller shaft, but cannot automatically remove floating objects that have been entangled. Utility Model Content
[0005] In order to solve the technical problem that the existing tugboat propeller shaft anti-winding technology can only prevent floating objects from winding into the propeller shaft but cannot automatically discharge the entangled floating objects, the utility model provides an anti-winding propeller structure.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] An anti-winding propeller structure comprises a lower gearbox housing and a propeller propeller hub, wherein the rear end of the propeller propeller hub is located in an opening of the lower gearbox housing, a gap is provided between the inner wall of the opening of the lower gearbox housing and the side wall of the propeller propeller hub, the opening of the lower gearbox housing is in the shape of a circular hole, the rear end of the propeller propeller hub is in the shape of a cylinder, the outer peripheral surface of the rear end of the propeller propeller hub is provided with a reverse thread, and the thread direction of the reverse thread is opposite to the rotation direction of the propeller propeller hub.
[0008] By adopting the above structural scheme, when the propeller propeller shaft drives the propeller propeller hub to rotate, if floating objects (such as fishing nets, ropes, plastic garbage, etc.) are entangled in the gap between the inner wall of the opening of the lower gear box shell and the side wall of the propeller propeller hub, since the thread direction of the reverse thread is opposite to the rotation direction of the propeller propeller hub, the floating objects that have been entangled in the gap can be reversely squeezed out with the help of the rotation force of the propeller propeller hub, effectively preventing the floating objects from being entangled on the propeller propeller shaft, and the cost is low. At the same time, the effective sealing of the seal is ensured, water is prevented from entering the lower gear box shell, and seawater corrosion is reduced.
[0009] As a preferred implementation method of an anti-winding propeller structure, the lower gear box housing includes a shell and an extended shell. The extended shell is a cylindrical structure with open ends and a hollow interior. The opening of the lower gear box housing is located at one end of the extended shell, and the other end of the extended shell is connected to the shell. A propeller propeller shaft extends from the shell, the propeller propeller shaft is coaxial with the extended shell, the propeller propeller shaft passes through the extended shell, and the propeller propeller hub is coaxially sleeved on the end of the propeller propeller shaft passing through the extended shell.
[0010] As a preferred implementation method of an anti-entanglement propeller structure, an annular seal is provided between the propeller propeller hub and the shell. The seal is sleeved on the outer circumferential surface of the propeller propeller shaft, one end of the seal abuts against the propeller propeller hub, and the other end of the seal abuts against the shell.
[0011] By adopting the above structural scheme, the seal can effectively protect the propeller propeller shaft from being corroded by seawater, and can also prevent seawater from entering the lower gearbox housing and prevent seawater from entering between the propeller propeller shaft and the propeller propeller hub.
[0012] As a preferred implementation method of an anti-winding propeller structure, an end face of a propeller propeller hub close to the shell is provided with an annular groove, the groove is coaxially arranged with the propeller propeller shaft, and an end of the seal close to the propeller propeller hub is located in the groove.
[0013] The above structural solution is adopted to improve the stability of the sealing member.
[0014] As a preferred implementation of an anti-winding propeller structure, the seal is a water seal.
[0015] As a preferred implementation of an anti-winding propeller structure, the propeller propeller hub and the propeller propeller shaft are interference fitted.
[0016] The beneficial effects of the utility model include:
[0017] When the propeller propeller shaft drives the propeller propeller hub to rotate, if floating objects such as fishing nets, ropes, plastic garbage, etc. are entangled in the gap between the inner wall of the opening of the lower gear box shell and the side wall of the propeller propeller hub, since the thread direction of the reverse thread is opposite to the rotation direction of the propeller propeller hub, the floating objects that have been entangled in the gap can be reversely squeezed out with the help of the rotation force of the propeller propeller hub, effectively preventing the floating objects from being entangled on the propeller propeller shaft, and the cost is low. At the same time, it also ensures the effective sealing of the seal, avoids water from entering the lower gear box shell, and reduces seawater corrosion. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 It is a half-section structural schematic diagram of a specific implementation mode of an anti-winding propeller structure in the utility model;
[0020] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the structure at A in the middle;
[0021] Figure 3 It is a schematic diagram of the working state of an anti-winding propeller structure in the utility model when it is applied to the left rudder;
[0022] Figure 4 It is a schematic diagram of the working state of an anti-winding propeller structure in the utility model when it is applied to the right rudder;
[0023] List of parts and reference numerals:
[0024] 1. Shell; 2. Extension shell; 3. Propeller hub; 4. Propeller shaft; 5. Groove; 6. Seal. DETAILED DESCRIPTION
[0025] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the utility model will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0026] Reference Figure 1-4 The present embodiment proposes an anti-winding propeller structure, including a lower gearbox housing and a propeller propeller hub 3. The lower gearbox housing includes a shell 1 and an extended shell 2. The extended shell 2 is a cylindrical structure with open ends and a hollow interior. One end of the extended shell 2 is open and connected to the shell 1. A propeller propeller shaft 4 extends out of the shell 1. The propeller propeller shaft 4 is coaxial with the extended shell 2. The propeller propeller shaft 4 passes through an opening opened at the other end of the extended shell 2. The propeller propeller hub 3 is coaxially sleeved on one end of the propeller propeller shaft 4 passing through the opening of the extended shell 2. The propeller propeller hub 3 is interference fitted with the propeller propeller shaft 4.
[0027] The front end of the propeller hub 3 is a cone, with the large end facing the lower gearbox housing. The rear end of the propeller hub 3 is a cylinder, the outer diameter of the cylinder is smaller than the large end outer diameter of the cone, and the outer circumference of the front end of the extended housing 2 extends along the outer circumference of the cone. The rear end of the propeller hub 3 is located in the opening, and there is a gap between the inner wall of the opening of the lower gearbox housing and the side wall of the propeller hub 3. The opening of the lower gearbox housing is in the shape of a circular hole, and the rear end of the propeller hub 3 is cylindrical. The outer circumference of the rear end of the propeller hub 3 is provided with a reverse thread. The propeller hub 3 rotates with the propeller shaft 4, and the thread direction of the reverse thread is opposite to the rotation direction of the propeller hub 3.
[0028] The end surface of the propeller hub 3 close to the housing 1 is provided with an annular groove 5, and the groove 5 is coaxially arranged with the propeller shaft 4. An annular seal 6 is provided between the propeller hub 3 and the housing 1. The seal 6 is a water seal 6, and the seal 6 is sleeved on the outer peripheral surface of the propeller shaft 4. The end of the seal 6 close to the propeller hub 3 abuts in the groove 5, and the end surface of the end abuts with the bottom of the groove 5 in the depth direction of the groove 5. The outer side of the seal 6 abuts with the inner wall of the groove 5, and the other end of the seal 6 abuts with the housing 1. The housing 1 in this application includes a connection structure between the propeller shaft 4 and the housing 1. A gear set is installed in the lower gearbox housing, and the gear set connects the propeller shaft 4 with the lower gearbox housing. The gear set is a common structure and is not drawn in the attached drawings.
[0029] Figure 3The arrow L in the figure indicates the left rudder rotation direction, and the arrow X indicates the direction of the reverse thread on the left rudder propeller hub 3. Figure 4 The arrow R in the figure indicates the right rudder rotation direction, and the arrow Y indicates the direction of the reverse thread on the right rudder propeller hub 3.
[0030] The working principle of this embodiment is:
[0031] When the propeller propeller shaft 4 drives the propeller propeller hub 3 to rotate, if floating objects (such as fishing nets, ropes, plastic garbage, etc.) are entangled in the gap between the inner wall of the opening of the lower gear box housing and the side wall of the propeller propeller hub 3, since the thread direction of the reverse thread is opposite to the rotation direction of the propeller propeller hub 3, the floating objects that have been entangled in the gap can be reversely squeezed out with the help of the rotation force of the propeller propeller hub 3, effectively preventing the floating objects from being entangled on the propeller propeller shaft 4, ensuring the effective sealing of the seal 6, avoiding water from entering the lower gear box housing, and reducing seawater corrosion.
[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An anti-winding propeller structure, comprising a lower gearbox housing and a propeller propeller hub (3), wherein the rear end of the propeller propeller hub (3) is located in an opening of the lower gearbox housing, and a gap is provided between an inner wall of the opening of the lower gearbox housing and a side wall of the propeller propeller hub (3), wherein: The opening of the lower gearbox housing is in the shape of a circular hole, the rear end of the propeller propeller hub (3) is in the shape of a cylinder, and the outer peripheral surface of the rear end of the propeller propeller hub (3) is provided with a reverse thread, the thread direction of the reverse thread being opposite to the rotation direction of the propeller propeller hub (3).
2. The anti-winding propeller structure according to claim 1, characterized in that: The lower gearbox housing comprises a housing (1) and an extension housing (2); the extension housing (2) is a cylindrical structure with two open ends and a hollow interior; the opening of the lower gearbox housing is located at one end of the extension housing (2); the other end of the extension housing (2) is connected to the housing (1); a propeller propeller shaft (4) extends out of the housing (1); the propeller propeller shaft (4) is coaxial with the extension housing (2); the propeller propeller shaft (4) passes through the extension housing (2); and the propeller propeller hub (3) is coaxially sleeved on one end of the propeller propeller shaft (4) passing through the extension housing (2).
3. The anti-winding propeller structure according to claim 2, characterized in that: An annular sealing member (6) is provided between the propeller hub (3) and the housing (1); the sealing member (6) is sleeved on the outer peripheral surface of the propeller shaft (4); one end of the sealing member (6) abuts against the propeller hub (3), and the other end of the sealing member (6) abuts against the housing (1).
4. The anti-winding propeller structure according to claim 3, characterized in that: An annular groove (5) is provided on the end surface of the propeller hub (3) close to the housing (1); the groove (5) is coaxially arranged with the propeller shaft (4); and the end of the sealing member (6) close to the propeller hub (3) is located in the groove (5).
5. The anti-winding propeller structure according to claim 3, characterized in that: The sealing member (6) is a water seal sealing member (6).
6. The anti-winding propeller structure according to claim 2, characterized in that: The propeller hub (3) and the propeller shaft (4) are interference fitted.