Blade bolt anti-loosening structure for steering oar in ice area

Abstract

The invention relates to the technical field of blade bolt structures, and discloses a blade bolt anti-loosening structure for an ice zone steering oar, the blade bolt anti-loosening structure comprises a hub and a blade, a groove is processed at the blade root of the bottom of the blade, a blade root bolt is arranged in the groove, the blade is fixedly connected to the outside of the hub through the blade root bolt, and the hub is fixedly connected with the hub through the blade root bolt. The top of the blade root bolt is provided with a lock washer, the periphery of the lock washer is connected to the surface of the hub in a spot welding mode, the blade and the hub are designed to be of a split structure and connected through the blade root bolt, the lock washer is installed on a hexagonal head at the top of the blade root bolt, and the clamping groove is matched with the blade root bolt. After the blade root bolt is impacted with torque, the hub is installed, then the periphery of the lock washer is fixed to the hub through spot welding, and therefore the anti-loose effect on the blade root bolt is achieved, when the blade is bent or damaged after operation, the blade is replaced by disassembling the blade root bolt, and the hub component can be repeatedly used.

Description

Technical Field

[0001] The invention relates to the technical field of blade bolt structures, and in particular to a blade bolt anti-loosening structure for a rudder propeller in an ice area. Background Art

[0002] Ice-rudder propellers are a type of propulsion device specifically used in polar ice areas and other cold seas. Their design and working principle are significantly different from traditional propellers. When sailing in ice areas, the propellers not only need to push the ship forward, but also need to have icebreaking capabilities to ensure smooth passage of the ship in ice-covered seas. Polar research vessels and other ships need to frequently cross dense ice areas to conduct scientific research and exploration. The efficient propulsion and flexible control capabilities of ice-rudder propellers make them an ideal choice for polar scientific research.

[0003] The blades of ice-rudder propellers play a vital role in navigation in polar ice areas. The design and performance of the blades directly affect the ship's maneuverability, safety and efficiency in ice areas. Ice-rudder propellers are designed for rudder propulsion systems operating in cold and frozen seas. Such rudder propellers need to have special structures and materials to cope with various extreme environmental conditions encountered during ice navigation, such as ice impact and low-temperature erosion.

[0004] The blades and the hub of a conventional pull-type fully rotating rudder propeller are cast as one piece. The hub and the propeller shaft are keylessly installed by oil pressure. The propeller is fitted onto the shaft to ensure the corresponding axial push-in amount to transmit torque. The blades rotate to generate a dragging force to enable the ship to move forward and backward. The conventional adjustable blade root bolts are fixed by spot welding with stainless steel wire series bolts to prevent loosening.

[0005] For rudder propellers or pod devices used in ice areas, if the blades are bent or damaged after operation, it is necessary to remove the blade root bolts and replace the blades, so as to reuse the blade head parts.

[0006] In view of the above problems, it is urgently necessary to carry out innovative design based on the existing blade bolts. Summary of the invention

[0007] In order to solve the existing technical problem of conveniently removing the blade root bolts to replace the blades and reusing the blade head components if the blades are bent or damaged after operation, the present invention provides a blade bolt anti-loosening structure for an ice area rudder propeller.

[0008] The present invention is implemented by the following technical scheme: a blade bolt anti-loosening structure for an ice area rudder propeller, comprising a hub and a blade, wherein a groove is processed at the bottom root of the blade, a blade root bolt is arranged inside the groove, the blade is fixedly connected to the outside of the hub by the blade root bolt, an anti-loosening washer is arranged on the top of the blade root bolt, and the anti-loosening washer is spot-welded around the periphery to the surface of the hub.

[0009] Preferably, a groove and an inner cavity are processed inside the anti-loosening gasket, and the groove and the inner cavity are connected.

[0010] Preferably, the slot is a regular hexagonal slot cavity, and the top hexagonal head of the blade root bolt fits with the inside of the slot.

[0011] Preferably, a washer is provided on the top of the blade root bolt, and the washer is located inside the inner cavity.

[0012] Compared with the prior art, the present invention has the following beneficial effects: When the present invention is in use, an anti-loosening washer is installed on the top hexagonal head of the blade root bolt, the slot is matched with the blade root bolt, and the blade root bolt is installed after the torque is applied. Then, the anti-loosening washer is fixed to the hub by spot welding all around, thereby preventing the blade root bolt from loosening. By designing the blade and the hub as separate structures, the blade and the hub are connected by the blade root bolt. If the blade is bent or damaged after operation, the blade can be replaced by removing the blade root bolt, and the hub component can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the anti-loosening washer of the present invention.

[0014] In the figure: 1, blade head; 2, blade; 3, blade root bolt; 4, anti-loosening washer; 41, slot; 42, inner cavity. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0016] Example 1: Please refer to Figure 1 - Figure 2 The blade bolt anti-loosening structure of the ice region rudder propeller of the present embodiment comprises a blade 1 and a blade 2, a groove is processed at the bottom blade root of the blade 2, a blade root bolt 3 is arranged inside the groove, the blade 2 is fixedly connected to the outside of the blade 1 through the blade root bolt 3, an anti-loosening washer 4 is arranged on the top of the blade root bolt 3, the anti-loosening washer 4 is spot-welded around the surface of the blade 1, a slot 41 and an inner cavity 42 are processed inside the anti-loosening washer 4, the slot 41 and the inner cavity 42 are connected, the slot 41 is a regular hexagonal slot cavity, and the top hexagonal head of the blade root bolt 3 fits with the inside of the slot 41; Among them, for the rudder propeller or pod device used in ice areas, it is generally required that the blade 2 is replaceable, so the blade 2 and the hub 1 are designed as a separate structure, and the blade 2 and the hub 1 are connected by the blade root bolt 3. If the blade 2 is bent or damaged after operation, the blade 2 can be replaced by removing the blade root bolt 3, and the hub 1 component can be reused; The blade bolt anti-loosening structure of the present invention is to install an anti-loosening washer 4 on the top hexagonal head of the blade root bolt 3, and the slot 41 is matched with the blade root bolt 3. The blade root bolt 3 is installed after the torque is applied, and then the anti-loosening washer 4 is fixed to the blade head 1 by spot welding around it, so as to play the role of anti-loosening; Secondly, the blade root bolt 3 at the junction of the blade 2 and the blade hub 1 is tightened with torque. Since the blade root bolt 3 is not allowed to be threaded with locking glue, and the blade hub 1 rotates at high speed together with the blade 2, the ship will encounter the impact of ice cubes during the icebreaking process, and the impact direction of the ice cubes is uncertain. The blade bolt anti-loosening structure of the present invention ensures the connection between the blade and the blade hub, thereby improving the impact resistance of the blade on a certain basis. Working principle: an anti-loosening washer 4 is installed on the top hexagonal head of the blade root bolt 3, the slot 41 fits with the blade root bolt 3, and the blade root bolt 3 is installed after the torque is applied, and then the anti-loosening washer 4 is fixed to the hub 1 by spot welding, so as to prevent the blade root bolt 3 from loosening. By designing the blade 2 and the hub 1 as a separate structure, the blade 2 and the hub 1 are connected by the blade root bolt 3. If the blade 2 is bent or damaged after operation, the blade 2 can be replaced by removing the blade root bolt 3, and the hub 1 component can be reused.

[0017] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A blade bolt anti-loosening structure for an ice-region rudder propeller, comprising a blade head (1) and a blade (2), characterized in that: A groove is machined at the bottom root of the blade (2), a blade root bolt (3) is arranged inside the groove, the blade (2) is fixedly connected to the outside of the blade hub (1) through the blade root bolt (3), a locking washer (4) is arranged on the top of the blade root bolt (3), and the locking washer (4) is spot-welded around the surface of the blade hub (1).

2. The blade bolt anti-loosening structure for ice-area rudder propeller according to claim 1, characterized in that: The anti-loosening washer (4) is internally processed with a slot (41) and an inner cavity (42), and the slot (41) and the inner cavity (42) are connected.

3. The blade bolt anti-loosening structure for ice-area rudder propeller according to claim 2, characterized in that: The clamping groove (41) is a regular hexagonal groove cavity, and the top hexagonal head of the blade root bolt (3) fits into the interior of the clamping groove (41).

4. The blade bolt anti-loosening structure for ice-area rudder propeller according to claim 2, characterized in that: A washer is provided on the top of the blade root bolt (3), and the washer is located inside the inner cavity (42).

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