CN207157470U - A kind of small underwater propeller - Google Patents

Abstract

The utility model relates to a small underwater propeller, comprising an underwater motor composed of a rotor end and a stator end, a paddle cap, a propeller, and a paddle shaft and a cone-shaped motor front sleeve, one end of the paddle shaft wears The inner hole of the propeller is connected with the slurry cap, the other end of the propeller shaft is fixedly connected with the small end of the motor front cover, and the large end of the motor front cover is fixedly connected with the outer wall of the rotor end, so that the rotor end drives The spinner cap, the propeller, the paddle shaft, and the front cover of the motor rotate together. The propeller, paddle shaft, and motor front cover are fixed together, so that the underwater propeller of the present utility model can output high torque; the utility model selects the underwater motor of model ROVMAKER, which can drive the underwater robot to dive to 100-200m , and the underwater motor makes the forward thrust of the underwater propeller about 2KG, and the reverse thrust is about 1.8KG; due to the small size and large thrust of the underwater motor, the underwater propeller is reduced to a certain extent. Volume, less resistance in water.

Description

A small underwater propeller

technical field

The utility model belongs to the field of underwater robots, in particular to a small underwater propeller.

Background technique

With the continuous expansion of the application field of underwater robots, it is necessary to develop an ultra-small autonomous underwater robot to replace manual dangerous operations in some shallow water areas. In order to improve the speed and maneuverability of ultra-small underwater robots, a propeller with small volume, low resistance and large torque is needed. However, when the propellers on the market have the same thrust and torque, the volume of the motor selected increases accordingly, resulting in an increase in the volume of the overall propeller, and the corresponding resistance also increases, which is not suitable for ultra-small underwater robots.

In the prior art, most of the underwater propellers are designed in one-piece structure, the shell is oval, the propeller is installed at the tail, and the whole is sealed, but when the propulsion is installed on the body of the underwater robot, additional connecting parts are required , in order to connect with the underwater robot, which will lead to a complex overall structure of the robot, increase the overall volume and weight of the robot, which is not conducive to the robot diving to a deeper depth, and is not suitable for small underwater robots.

Utility model content

The purpose of the utility model is to provide a small-sized underwater propeller to overcome the shortcomings of the existing propellers with large volume and high resistance.

For this reason, the technical scheme of the utility model is as follows:

A small underwater propeller, including an underwater motor consisting of a rotor end and a stator end, a propeller cap, a propeller, and a propeller shaft and a frustum-shaped motor front sleeve, one end of the propeller shaft passes through the propeller The inner hole of the motor is connected with the slurry cap, the other end of the propeller shaft is fixedly connected with the small end of the motor front cover, and the large end of the motor front cover is fixedly connected with the outer wall of the rotor end, so that the rotor end drives the propeller cap, the propeller , the paddle shaft, and the front cover of the motor rotate together.

The above-mentioned small underwater propeller also includes a motor back cover for the stator end to be embedded, and the motor back cover is used to connect the underwater propeller with diving equipment;

The inner wall of the rear cover of the motor is fixedly connected with the outer wall of the stator end.

The above-mentioned small-sized underwater propulsion device also includes a cone-shaped hollow structure shroud, and the shroud is fixedly connected with the motor back cover through a connecting piece;

The propeller and the front cover of the motor are located in the inner cavity of the wind deflector.

In the above-mentioned small-sized underwater propeller, the connecting parts are a plurality of fixing strips evenly distributed along the axis of the motor back cover, one end of the fixing bar is fixedly connected with the upper end surface of the motor back cover, and the other end is connected with the motor back cover. The large end of the shroud is fixedly connected.

The above-mentioned small underwater propeller, the model of the underwater motor is ROVMAKER.

In the aforementioned small underwater propeller, the paddle cap is a bullet nut, an external thread is provided on the outer wall at one end of the paddle shaft, and the paddle shaft is threadedly connected to the bullet nut.

The beneficial effects of the utility model:

1. Fix the propeller, paddle shaft and motor front cover as one, so that the underwater propeller of the present utility model can output high torque;

2. This utility model selects the underwater motor of model ROVMAKER, which can drive the underwater robot to dive to 100-200m, and the underwater motor makes the forward thrust of the underwater propeller about 2KG, and the reverse thrust is about 2KG. The thrust is about 1.8KG;

3. Because the volume of the underwater motor is small and the thrust is large, the utility model reduces the volume of the underwater propeller to a certain extent, and the resistance in water is smaller.

The utility model will be described in further detail below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Figure 1 is a schematic diagram of the structure of the underwater thruster.

Figure 2 is a structural schematic diagram of the connection between the propeller and the spinner dome.

Fig. 3 is a structural schematic diagram of the connection between the paddle shaft and the front sleeve of the motor.

Figure 4 is an exploded view of the underwater thruster.

Fig. 5 is a cross-sectional view of the underwater thruster.

In the figure: 1. propeller cap; 2. propeller; 3. propeller shaft; 4. boss; 5. motor front cover; 51. installation hole; 6. underwater motor; 61. rotor end; 62. stator end; 7 . Motor back cover; 71. First body; 72. Second body; 73. Fixing plate; 8. Shroud; 9. Fixing bar.

Detailed ways

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this The utility model creations and simplified descriptions do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limitations on the utility model creations.

In addition, the terms "first", "second", "third" and so on are used for descriptive purposes only, and should not be interpreted as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the utility model creation, unless otherwise specified, "plurality" means two or more than two.

The terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct It can also be connected indirectly through an intermediary, or it can be the internal communication of two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the invention of the utility model through specific situations.

In order to further explain the technical means and effects of the utility model to achieve the intended purpose, the specific implementation, structural features and effects of the utility model will be described in detail below in conjunction with the accompanying drawings and examples.

Example 1:

In order to solve the defects of large volume and high resistance of existing propellers, this embodiment provides a small underwater propeller, as shown in Figures 1 and 2, the underwater propeller of this embodiment includes an underwater motor 6 , paddle cap 1, propeller 2, paddle shaft 3, motor front cover 5, underwater motor 6 is made up of rotor end 61 and stator end 62, and the shape of preferred motor front cover 5 is the truncated cone type as shown in Figure 3, as As shown in Fig. 4 and Fig. 5, one end of the paddle shaft 3 passes through the inner hole of the propeller 2 and is connected with the slurry cap, and the other end of the paddle shaft 3 is fixedly connected with the small end of the motor front cover 5, and the The big end of the front cover 5 of the motor is fixedly connected with the outer wall of the rotor end 61, so that the rotor end 61 drives the spinner cap 1, the propeller 2, the paddle shaft 3, and the front cover 5 of the motor to rotate together. In this way, the rotor end 61 rotates together with the spinner cap 1, the propeller 2, the propeller shaft 3, and the front cover 5 of the motor, thereby pushing the underwater equipment to float or dive.

Considering the stable connection between the underwater motor 6 and the underwater equipment, as shown in Figure 5 and Figure 4, the stator end 62 of this embodiment is also embedded in the motor rear cover 7, and the motor rear cover 7 is used to turn the underwater propeller Connect with the diving equipment; the motor back cover 7 is made up of the first body 71, the second body 72 connected with the first body 71 and the fixing part for fixing the underwater motor 6; the fixing part is connected with the first body 71 or the second body The inner walls of the two bodies 72 are fixedly connected; the stator end 62 is embedded from the end of the first body 71 and fixedly connected with the fixing member; the inner wall of the motor rear cover 7 is fixedly connected with the outer wall of the stator end 62 . In this way, extending the second body 72 into the sleeve of the underwater equipment and fixing it with threads can realize safe and stable operation of the underwater equipment.

In order to prevent small relative rotation after the motor front cover 5 is connected to the paddle shaft 3, a boss 4 is arranged on the small end of the motor front cover 5 in this embodiment, and the paddle shaft 3 is fixed on the boss. 4; the bottom end of the paddle sleeve of the propeller 2 is provided with a groove, and when the paddle shaft 3 passes through the paddle sleeve, the boss 4 extends into the groove to realize that the propeller 2 and the circumferential anti-rotation between the front cover 5 of the motor.

As shown in Fig. 4 and Fig. 5, the underwater thruster of this embodiment also includes a cone-shaped hollow structure guide cover 8, which is fixedly connected with the motor rear cover 7 through a connecting piece; the propeller 2 and The motor front cover 5 is located in the inner cavity of the shroud 8 .

The flow deflector 8 of this embodiment can make the water flow pass through the propeller 2 regularly, generate greater thrust, increase the propulsion efficiency, and reduce the rotational energy of the flow to a certain extent. At the same time, the fairing 8 of this embodiment is designed to be streamlined and has a tapered structure, so that the resistance of the underwater propeller in water can be successfully reduced.

It should be pointed out that the fixing parts of this embodiment can be any existing fixing parts, such as: fixing sleeves, fixing plates 73, fixing belts, etc. In order to minimize the resistance of the underwater propeller when it acts in water, this The connectors in the embodiment are a plurality of fixing strips 9 uniformly distributed along the axis of the motor rear cover 7, one end of the fixing strips 9 is fixedly connected to the upper end surface of the motor rear cover 7, and the other end is connected to the wind deflector. The big end of 8 is fixedly connected. The fixing strip 9 has a slender structure, has a small contact area with water, and has small resistance.

The underwater motor 6 itself is a waterproof structure, so the propeller does not need to be provided with other waterproof structures. Because the underwater motor 6 is a waterproof structure, the whole is divided into a rotor end 61 and a stator end 62. The rotor end 61 is connected to the propeller 2. Between connect by above-mentioned motor front cover 5, this motor front cover 5 is set to conical shape, makes water flow more fluent. This motor front cover 5 has promptly guaranteed the thrust of propeller under water, has reduced the volume of propeller again; On the cone of this motor front cover 5, installation hole is set, and screw is set in this installation hole, and motor front cover 5 It is fixedly connected with the underwater motor 6 by screws.

The preferred model of the underwater motor 6 in this embodiment is the underwater motor 6 of ROVMAKER. The underwater motor 6 is a brushless motor with an underwater special external rotor and can be rotated forward and reverse developed by the ROVMAKER.CN community. It uses 5S Internal power supply, voltage can choose 12V, 16V, 24V. After the pressure test, the underwater motor 6 of this embodiment can be used at a depth of 500 meters underwater. Considering the safety of underwater equipment, the underwater propeller of this embodiment drives the underwater equipment to enter the depth of 100-200 meters underwater. Rice is relatively safe. The underwater motor of model ROVMAKER adopts the surface of the magnetic cylinder to be protected by epoxy resin coating, and the bearing is made of super corrosion-resistant steel (compared with ordinary stainless steel bearings, its corrosion resistance and rust resistance are improved by more than 20 times) , Silicon steel sheet adopts electrophoresis anticorrosion process. It has perfect characteristics such as low cost, maintenance-free, and corrosion resistance. Fully meet the underwater environment requirements.

Normally, the underwater motor 6 pushes forward under the action of 12v voltage, with a thrust of 1kg and a current of 7.8, and the underwater motor 6 pushes backward under the action of a voltage of 12v, with a thrust of 0.86kg and a current of 7.7. Under the action of 16v voltage, the underwater motor 6 pushes forward with a thrust of 1.5kg and a current of 10.9, and the underwater motor 6 pushes backward under the action of a voltage of 16v with a thrust of 1.25kg and a current of 10.9. Under the effect of 24v voltage, the underwater motor 6 pushes forward, with a thrust of 2kg and a current of 16. Under the effect of a voltage of 24v, the underwater motor 6 reverses, with a thrust of 1.8kg and a current of 16.1.

The spinner cap 1 of this embodiment can be any form in the existing spinner cap 1. In order to make the propeller shaft 3 pass through the propeller 2 and be fixedly connected with the spinner cap 1 and not easily loosen, the spinner cap 1 of the present embodiment is preferably a bullet. Head nut, the outer wall at one end of the paddle shaft 3 is provided with external threads, and the paddle shaft 3 is threadedly connected with the bullet nut. Bullet nut is installed on the blade of propeller 2, and squeezes downward, and extrudes with the screw rod on the paddle shaft 3, thereby prevents propeller 2 from moving up and down along the shaft. Moreover, the bullet nut has a conical shape, which is beneficial to the flow of water, thereby improving the propulsion effect of the underwater propeller.

This embodiment is a kind of underwater thruster suitable for ultra-small underwater robots. The underwater thruster integrates the ducted propeller 2 and the underwater motor 6 in structure to reduce the loss of torque during power transmission. The underwater motor 6 The stator end 62 and the rotor end 61 are statically sealed, and the rotor is integrated with the propeller shaft 3 of the propeller 2. This structural integration reduces the volume of the device. The fairing 8 is designed to be streamlined, which reduces the resistance in water, so that the underwater propeller of this embodiment has the advantages of small volume, large thrust, light weight and low resistance. The underwater propeller of this embodiment is applied to an ultra-small underwater robot. It has the advantages of small size, high torque output at low rotational speed, low noise and high propeller efficiency.

Example 2:

This embodiment describes in detail the underwater thruster with the best thrust, the least resistance, and the smallest volume. Front cover 5, shroud 8, rotor, motor, stator, motor rear cover 7; the propeller cap 1 is connected with the propeller shaft 3, so that the propeller is fixed on the front cover of the motor, and the front cover 5 of the motor is connected with the motor The rotor is connected, so that when the rotor of the motor starts to rotate after receiving the command, the propeller shaft 3 is driven to rotate, and the propeller 2 is fixed on the propeller shaft 3, so the rotation of the propeller shaft 3 will drive the propeller 2 to rotate. The design of the front cover and the rear cover of the motor is to prevent the motor from leaking under the high-pressure water environment, so that water enters the motor and causes the motor to burn out. The back cover 7 of the motor is to be connected with a connector on the side of the ultra-small underwater robot, so that the disassembly and maintenance of the horizontal propeller are convenient.

The spinner cap 1 is connected with the propeller shaft 3, and the purpose is to fix the propeller 2 and prevent the propeller 2 from moving. And the appearance shape of the spinner cap 1 is designed as a bullet shape in order to reduce the resistance in water. The shape of the motor front cover can also reduce the resistance in water very well.

The motor back cover 7 is connected with the shroud 8 of the propeller, and the rear end surface of the shroud 8 has three threaded holes, and the position of the back shroud of the motor and the shroud 8 of the propeller is fixed by screws. This also avoids the inconvenience of fixing the motor rear cover and the motor. When the propeller 2 of the propeller rotates in the water, it will generate a reaction force, thereby providing power for the underwater robot to move forward. When the underwater robot is moving forward, due to the resistance of the water, the appearance of the propeller should be set as streamlined as possible. To reduce the resistance in water, the guide cover 8 of this utility model is designed to be streamlined, successfully reducing the resistance in water.

The connection method between the motor front cover 5 and the motor, the motor rotor end 61 has thread holes, and the designed motor front cover 5 has countersunk holes on the end surface, and the motor front cover and the motor are fixed with countersunk screws. The gap is sealed with epoxy glue to prevent water from entering it.

The underwater thruster of this embodiment is suitable for ultra-small underwater robots, and the underwater motor 6 is isolated from the water of the outside under the seal of the outer shell, and the power supply for the underwater motor 6 is supplied by the battery, and the underwater motor 6 is driven by the rotor end 61 The propeller 2 and the front cover 5 of the motor rotate, and the propeller 2 pushes the underwater equipment forward. During the transmission process of the propeller 2, the purpose of adjusting the speed is achieved through the control device. The underwater propeller of this embodiment is suitable for a water depth of 100 meters. The forward thrust is about 2KG, and the reverse thrust is about 1.8KG. Both the motor front cover and the guide cover 8 are designed to be streamlined, which enhances the fluidity of the water, thereby enhancing the propulsion effect. This embodiment effectively reduces the volume of the underwater propeller, thereby more conveniently applicable to ultra-small underwater robot.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or substitutions can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (6)

1. a kind of small underwater propeller, including submersible machine (6), the spinner being made up of rotor-end (61) and stator terminal (62) (1), propeller (2), it is characterised in that the motor protheca (5) also including paddle shaft (3) and frustum type, the one of the paddle shaft (3) The endoporus through the propeller (2) is held to be connected with the spinner (1), the other end and the motor protheca (5) of the paddle shaft (3) Small end is fixedly connected, and the big end of the motor protheca (5) is fixedly connected with the outer wall of rotor-end (61) so that rotor-end (61) band Dynamic spinner (1), propeller (2), paddle shaft (3), motor protheca (5) rotate in the lump.

2. small underwater propeller as claimed in claim 1, it is characterised in that also include for the stator terminal (62) insertion Motor rear enclosure (7), the motor rear enclosure (7) are used to couple underwater propeller with diving apparatus；

The inwall of the motor rear enclosure (7) is fixedly connected with the outer wall of stator terminal (62).

3. small underwater propeller as claimed in claim 1, it is characterised in that the also kuppe including conical hollow structure (8), the kuppe (8) is fixedly connected with motor rear enclosure (7) by connector；

The propeller (2) and motor protheca (5) are located at the inner chamber of kuppe (8).

4. small underwater propeller as claimed in claim 3, it is characterised in that the connector is along motor rear enclosure (7) The uniform multiple fixed strips (9) in axle center, one end of the fixed strip (9) are fixedly connected with the upper surface of motor rear enclosure (7), the other end It is fixedly connected with the big end of the kuppe (8).

5. the small underwater propeller as described in claim any one of 1-4, it is characterised in that the type of the submersible machine (6) Number it is ROVMAKER.

6. small underwater propeller as claimed in claim 1, it is characterised in that the spinner (1) is bullet head nut, described The outer wall of paddle shaft (3) one end is provided with external screw thread, and the paddle shaft (3) is connected with sub warhead nut thread.