Anti-shearing propeller hub structure for steering oar in ice region

Abstract

The utility model discloses an anti-shearing blade and hub structure for an ice zone steering oar, which comprises a oar shaft, a hub and an oar, the oar shaft is sleeved with the hub, the hub and the oar shaft are fixedly installed through a key, the root of the oar is provided with a blade root, and the blade root and the hub are in detachable structure connection; a boss is arranged on the periphery of the hub, a groove matched with the boss is formed in the inner side of the blade root, and the boss is located in the groove. According to the hub, the boss structure and the groove structure are arranged to be installed in a matched mode, the installation requirement of the blades and the hub is guaranteed, meanwhile, the hub has the anti-shearing function, the boss structure serves as a stop ring and is used for bearing the front impact load and the rear impact load of blade ice, the strength of ice block impact in the ice region navigation process can be met, and meanwhile the cylindrical pin is arranged, so that the service life of the hub is prolonged. The installation position of the first bolt can be guaranteed, the anti-shearing capacity of the blade is improved on a certain basis, and the use safety life coefficient of the blade hub is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of propeller blades and hubs, and particularly relates to an anti-shear propeller blade and hub structure for an ice area rudder propeller. Background Technique

[0002] For a conventional pull-type full-rotation rudder propeller, the propeller blade and the hub are cast integrally. The hub and the propeller shaft are installed without a key by hydraulic pressure. The propeller is sleeved on the shaft to ensure a corresponding axial push-in amount to transmit torque. The propeller blade rotates to generate a towing force to realize the forward and backward movement of the ship. For a rudder propeller or a pod device used in an ice area, it is generally required that the propeller blade be replaceable. Therefore, the propeller blade and the hub are designed as a split structure. The propeller blade and the hub are connected by root bolts. If the propeller blade is bent or damaged after operation, the propeller blade can be replaced by removing the root bolts, and the hub components can be reused. Since the hub rotates at a high speed together with the propeller blade, during the icebreaking process of the ship, it will encounter the impact of ice blocks, and the impact direction of the ice blocks is uncertain. If only fixed by the root bolts, it is easy to cause shear damage to the bolts, and its service life and safety factor will drop rapidly. Content of the Utility Model

[0003] The purpose of the utility model is to provide an anti-shear propeller blade and hub structure for an ice area rudder propeller to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: An anti-shear propeller blade and hub structure for an ice area rudder propeller, including a propeller shaft, a hub, and a propeller blade. The hub is sleeved outside the propeller shaft, and the hub and the propeller shaft are fixedly installed by a key. The root of the propeller blade is provided with a blade root, and the blade root and the hub are detachably connected;

[0005] A boss is provided on the outer periphery of the hub, and a groove matching the boss is provided on the inner side of the blade root, and the boss is located inside the groove.

[0006] Preferably, a threaded hole is provided in the middle of the boss, a cylindrical pin is installed in the threaded hole by a thread, a pin hole matching the cylindrical pin is provided inside the groove, and the pin hole is sleeved on the cylindrical pin.

[0007] Preferably, a plurality of threaded holes are provided in the radial direction of the hub, counterbore holes matching the threaded holes are provided on the blade root, and the threaded holes and the counterbore holes are fixedly connected by first bolts.

[0008] Preferably, a fixing plate for limiting the hub is provided at one end of the propeller shaft, and the fixing plate is fixedly installed on the end face of the propeller shaft by a second bolt.

[0009] Preferably, a limiting platform is provided on the end face of the hub, and the fixing plate abuts against the limiting platform.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] In the utility model, a boss and a groove structure are arranged for cooperative installation, which not only ensures the installation requirements of the blade and the hub, but also has the function of anti-shear. The boss structure serves as a retaining ring to bear the front and rear impact loads of the ice blade, and can meet the strength requirements for ice impact during ice area navigation. At the same time, the set cylindrical pin not only ensures the installation position of the first bolt, but also improves the anti-shear ability of the blade to a certain extent, greatly improving the safety service life coefficient of the blade and the hub, enabling the steering and propulsion device to be replaced before the blade is damaged, effectively reducing the root cutting risk of the first bolt, preventing the separation of the blade and the hub, and effectively ensuring the power key components of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a sectional view of the utility model;

[0013] In the figure: 1, blade; 11, blade root; 12, groove; 2, hub; 21, boss; 22, limiting platform; 3, propeller shaft; 4, first bolt; 5, cylindrical pin; 6, fixing plate; 7, second bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0015] Please refer to Figure 1 , the present utility model provides a technical solution: an anti-shear blade and hub structure for an ice area steering and propulsion device, including a propeller shaft 3, a hub 2 and a blade 1. The hub 2 is sleeved outside the propeller shaft 3, and the hub 2 and the propeller shaft 3 are fixedly installed by a key. One end of the propeller shaft 3 is provided with a fixing plate 6 for limiting the hub 2, and the fixing plate 6 is fixedly installed on the end face of the propeller shaft 3 through a second bolt 7;

[0016] A limiting platform 22 is provided on the end face of the hub 2, and the fixing plate 6 abuts against the limiting platform 22.

[0017] When installing the hub 2, first install the hub 2 on the propeller shaft 3 through a key, and then fixedly install the fixing plate 6 on the end face of the propeller shaft 3 through the second bolt 7, so that the fixing plate 6 abuts against the limiting platform 22, and the fixing plate 6 limits the hub 2.

[0018] The root of the blade 1 is provided with a blade root 11, and the blade root 11 and the hub 2 are detachably connected;

[0019] A boss 21 is provided on the outer periphery of the propeller hub 2, and a groove 12 matching the boss 21 is provided on the inner side of the blade root 11. The boss 21 is located inside the groove 12;

[0020] A threaded hole is provided in the middle of the boss 21. A cylindrical pin 5 is installed in the threaded hole by threading. A pin hole matching the cylindrical pin 5 is provided inside the groove 12, and the pin hole is sleeved on the cylindrical pin 5;

[0021] A plurality of threaded holes are provided in the radial direction of the propeller hub 2, and counterbore holes matching the threaded holes are provided on the blade root 11. The threaded holes and the counterbore holes are fixedly connected by a first bolt 4.

[0022] When installing the propeller blade 1, first install the cylindrical pin 5 in the middle of the boss 21 through the threaded hole, then align the groove 12 on the inner side of the blade root 11 with the boss 21 on the outer side of the propeller hub 2, then sleeve the pin hole on the cylindrical pin 5, so that the groove 12 also fits on the boss 21, and then lock the blade root 11 and the propeller hub 2 with the first bolt 4;

[0023] By setting the cooperation installation of the boss 21 and the groove 12 structure, it not only ensures the installation requirements of the propeller blade and the propeller hub, but also has the function of anti-shear. The boss 21 structure serves as a retaining ring to bear the front and rear impact loads of the propeller ice, and can meet the strength requirements for ice impact during ice area navigation. At the same time, the set cylindrical pin 5 can not only ensure the installation position accuracy of the first bolt 4, but also improve the anti-shear ability of the propeller blade 1 to a certain extent, greatly improving the service life safety factor of the propeller blade 1 and the propeller hub 2, enabling the steering propeller device to be replaced before the blade 1 is damaged, effectively reducing the root cutting risk of the first bolt 4, preventing the separation of the propeller blade 1 and the propeller hub 2, and effectively ensuring the key power components of the ship.

[0024] The working principle and usage process of the present utility model:

[0025] When installing the propeller hub 2, first install the propeller hub 2 on the propeller shaft 3 through a key, and then fixedly install the fixing plate 6 on the end face of the propeller shaft 3 through a second bolt 7, so that the fixing plate 6 abuts against the limiting platform 22, and the fixing plate 6 limits the propeller hub 2; when installing the propeller blade 1, first install the cylindrical pin 5 in the middle of the boss 21 through the threaded hole, then align the groove 12 on the inner side of the blade root 11 with the boss 21 on the outer side of the propeller hub 2, then sleeve the pin hole on the cylindrical pin 5, so that the groove 12 also fits on the boss 21, and then lock the blade root 11 and the propeller hub 2 with the first bolt 4;

[0026] By setting up the cooperation installation of the boss 21 and the groove 12 structures, it not only ensures the installation requirements of the blade and the hub, but also has the function of anti-shear. The boss 21 structure serves as a stop ring to bear the front and rear impact loads of the propeller ice, and can meet the strength requirements of ice area navigation for ice impact. At the same time, the set cylindrical pin 5 can not only ensure the installation position accuracy of the first bolt 4, but also improve the anti-shear ability of the blade 1 to a certain extent, greatly improving the service safety life coefficient of the blade 1 and the hub 2, enabling the steering propeller device to be replaced before the blade 1 is damaged, reducing the root cutting risk of the first bolt 4, preventing the separation and disengagement of the blade 1 and the hub 2, and effectively ensuring the key power components of the ship.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shear-resistant blade and hub structure for an ice-region rudder propeller, comprising a propeller shaft (3), a hub (2) and a blade (1), characterized in that: The blade head (2) is sleeved on the outside of the blade shaft (3), and the blade head (2) and the blade shaft (3) are fixedly installed by a key; a blade root (11) is provided at the root of the blade (1), and the blade root (11) and the blade head (2) are connected in a detachable structure; A boss (21) is provided on the outer periphery of the impeller hub (2), a groove (12) matching the boss (21) is provided on the inner side of the blade root (11), and the boss (21) is located inside the groove (12).

2. The shear-resistant blade and paddle wheel structure for ice-region rudder propeller according to claim 1, characterized in that: The boss (21) has a threaded hole in the middle, a cylindrical pin (5) is installed in the threaded hole through a thread, and a pin hole matching the cylindrical pin (5) is provided inside the groove (12), and the pin hole is sleeved on the cylindrical pin (5).

3. The shear-resistant blade and hub structure for an ice-region rudder propeller according to claim 1, characterized in that: The hub (2) is provided with a plurality of threaded holes in the radial direction, the blade root (11) is provided with countersunk holes matching the threaded holes, and the threaded holes and the countersunk holes are fixedly connected by first bolts (4).

4. The shear-resistant blade and paddle wheel structure for ice-region rudder propeller according to claim 1, characterized in that: A fixing plate (6) for limiting the position of the blade head (2) is provided at one end of the blade shaft (3); the fixing plate (6) is fixedly mounted on the end surface of the blade shaft (3) by means of a second bolt (7).

5. The shear-resistant blade and hub structure for an ice-region rudder propeller according to claim 4, characterized in that: The end surface of the paddle wheel (2) is provided with a limiting platform (22), and the fixing plate (6) abuts against the limiting platform (22).

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