CN115817778A - Rim propeller with axial magnetic field - Google Patents

Abstract

The rim propeller of an axial magnetic field disclosed by the present invention includes a stator, a rotor, a casing, a conduit and a water-lubricated bearing, etc.; Utilizing the advantages of the axial magnetic field motor, the radial size of the rim propeller is effectively reduced, and at the same time, the axial length of the rotor is effectively reduced, the annular loss of the rim propeller is reduced, and the arrangement of the thrust bearing is increased. space, which increases the life of the thrust bearing and further improves the performance of the product.

Description

A Rim Propeller with Axial Magnetic Field

technical field

The invention belongs to the technical field of ship propulsion, and in particular relates to an axial magnetic field rim propeller.

Background technique

As a highly integrated propeller device, the rim propeller cancels the shafting drive of the traditional propulsion method, and realizes the integrated integration of the motor and propeller. The device has a simple and compact structure, small size, and flexible installation.

At present, the rim thruster usually uses a built-in permanent magnet synchronous motor as its power source to drive the rotor to rotate, thereby driving the propeller integrated with the rotor to rotate to generate thrust. The built-in permanent magnet synchronous motor is generally a radial field motor, and the radial field motor has the following problems as the driving source of the rim propeller: 1. Since the magnetic field direction of the radial field motor is radial, its main components include but are not limited to Rotor yokes, permanent magnets, and stator armatures all need to be radially distributed, which greatly occupies the radial dimension of the propeller, resulting in the current radial dimension of the rim propeller being too large, increasing the weight of the propeller and reducing the propeller duct Efficiency; 2. The radial field motor includes a rotor with a relatively long axial length. The outer wall of the rotor in the air gap and the inner wall of the inner rotor will generate greater resistance during rotation, and the resistance value is related to the rotor axis 3. The radial distance of the rotor of the radial magnetic field motor is relatively small, which is the radial dimension of relative rotation. The water-lubricated thrust bearing and radial bearing of the propeller are arranged in line with the This space results in a limited arrangement space for the thrust bearing, which increases the pressure per unit area of the thrust bearing and reduces the service life of the bearing.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the present invention proposes an axial magnetic field rim propeller.

The technical solution adopted by the present invention to solve the technical problem is: a rim thruster with an axial magnetic field, including a casing and a rotor installed in the casing through a water-lubricated radial bearing. The stators on the left and right sides are connected with conduits on the outside of each stator. The casing surface is evenly distributed with drainage holes in the circumferential direction. The sediment entering the gap will be discharged through the drainage holes during the working state. The water lubricated radial bearing surface The chute is evenly distributed in the circumferential direction, and the rotor includes a rotor iron core and a propeller installed inside the rotor iron core. Cooperating with the outer surface of the iron core can constrain the radial movement of the rotor. The iron core slots on the left and right ends of the rotor iron core are respectively installed with permanent magnets. The stator winding installed in the stator base, the stator sealing plate and the water-lubricated thrust bearing matched with the rotor grinding ring are arranged in sequence on the outside of the stator winding, and the water-lubricated thrust bearing and the rotor grinding ring can restrain the shaft of the rotor to the movement.

The rim propeller with an axial magnetic field is characterized in that the length direction of the chute and the axial direction of the rotor form an angle α, where 0<α≤25, corresponding to the direction of rotation of the propeller, to reduce Small flow loss.

In the axial magnetic field rim thruster, the water-lubricated thrust bearing and the water-lubricated radial bearing adopt sliding bearings made of polymer materials.

In the axial magnetic field rim propeller, the conduit adopts a streamlined outer surface, which can improve the efficiency of the rim propeller.

The beneficial effects of the present invention are:

When the rim thruster is working, the external frequency converter supplies power to the stator through the cable, and the stator winding generates a rotating magnetic field to pull the permanent magnet installed in the rotor, driving the entire rotor to rotate so that the propellers rotate synchronously, and the propellers are used to generate thrust to drive the aircraft forward .

The rotor and stator of the rim thruster are axially arranged according to the structure of stator-rotor-stator, and the structural form of the axial field motor with S-R-S double stator structure is adopted, and the advantages of the axial field motor are used to effectively reduce the cost of the rim thruster. At the same time, the axial length of the rotor is effectively reduced, the annular loss of the wheel rim propeller is reduced, the layout space of the thrust bearing is increased, the life of the thrust bearing is increased, and the performance of the product is further improved. .

Description of drawings

Fig. 1 is an explosion diagram of the present invention;

Fig. 2 is a partial sectional view of the present invention;

Fig. 3 is a perspective view of the present invention;

Figure 4 is an exploded view of the rotor of the present invention;

Fig. 5 is an exploded view of the stator of the present invention.

The reference signs are: 100—rim propeller, 1—rotor, 11—rotor grinding ring, 12—permanent magnet, 13—rotor core, 131—core groove, 132—iron core outer surface, 14— Propeller, 2—stator, 21—water lubricated thrust bearing, 22—stator sealing plate, 23—stator winding, 24—stator base, 241—stator wedge, 3—casing, 31—drain hole, 4—water lubrication Radial bearing, 41—chute, 5—guide tube.

Detailed ways

Embodiments of the present invention will be described in detail below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention. For example, although various components in the drawings are drawn in specific proportions, these proportions are merely exemplary, and those skilled in the art can make adjustments as needed so as to adapt to specific applications.

It should be noted that, in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on the drawings The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a Invention Limitations.

In addition, it should be noted that, in the description of the present invention, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection or It is a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal connection between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

According to an example of the present invention, as shown in FIG. 1 , the rim thruster 100 of the present invention includes a rotor 1 , a stator 2 , a casing 3 , a water-lubricated radial bearing 4 and a conduit 5 .

Referring to Figures 2 and 3, the rotor 1 is in contact with the stator 2 on the left and right sides, the conduits 5 on the left and right sides are respectively connected to the left and right sides of the stator 2, and the inner side of the water-lubricated radial bearing 4 cooperates with the rotor 1 , the outer side of the water-lubricated radial bearing 4 is connected to the casing 3 . The drain holes 31 are evenly distributed on the circumferential surface of the casing 3 , and the chute 41 is evenly distributed on the circumferential surface of the water-lubricated bearing 4 .

The rotor 1 includes a rotor grinding ring 11, a permanent magnet 12, a rotor core 13 and a propeller 14, the rotor core 13 includes a smooth core outer surface 132, and the propeller 14 is installed on the rotor iron Inside the core 13, the permanent magnets 12 are installed in the iron core slots 131 on the left and right ends of the rotor iron core 13. Referring to FIG.

The stator 2 includes a water-lubricated thrust bearing 21 , a stator sealing plate 22 , a stator winding 23 and a stator base 24 . The inner side of the stator base 24 is provided with a stator wedge 241, as shown in FIG. on the stator wedge 241.

The working principle of the present invention is: when the rim thruster 100 is working, an external frequency converter (not shown) supplies power to the stator 2 through a cable (not shown), and the stator winding 23 generates a rotating magnetic field to pull the rotor installed in the rotor 1 The permanent magnet 12 drives the entire rotor 1 to rotate so that the propeller 14 rotates synchronously, and the propeller 14 is used to generate thrust to drive the aircraft forward. Since the water-lubricated thrust bearing 21 cooperates with the rotor counter-grinding ring 11, the axial movement of the rotor 1 can be restricted, while the water-lubricated radial bearing 4 cooperates with the outer surface 132 of the iron core to restrain the radial movement of the rotor 1. When rotating, the outer water flow flows through the chute 41 which forms an angle α (0<α≤25) with the axial direction of the rotor 1 , and the slotting direction of the chute 41 corresponds to the rotation direction, which can reduce flow loss.

The thrust bearing 21 and the radial bearing 4 include but are not limited to sliding bearings made of polymer materials. The duct 5 has a streamlined outer edge, which can improve the efficiency of the rim propeller. In normal working condition, the silt entering the gap will be discharged through the drain hole 31.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, as well as the partially used embodiments. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, some deformations and modifications can also be made. Improvements, these all belong to the protection scope of the present invention.

Claims (4)

1. A rim thruster for an axial magnetic field, comprising: including casing (3) and install rotor (1) in casing (3) through water lubricated journal bearing (4), still be provided with stator (2) that are located the rotor (1) left and right sides in casing (3), every stator (2) outside all connects pipe (5), casing (3) surface circumference evenly distributed have blow-off hole (31), water lubricated journal bearing (4) surface circumference evenly distributed has chute (41), rotor (1) including rotor core (13) and install screw (14) inboard in rotor core (13), rotor core (13) have smooth iron core surface (132) with water lubricated journal bearing (4) adaptation, permanent magnet (12) are installed respectively in iron core groove (131) of terminal surface about rotor core (13), permanent magnet (12) are provided with the rotor outward to grinding ring (11), stator (2) include stator base (24) and install stator winding (23) in stator base (24) through stator wedge (241), stator winding (23) outside set gradually with rotor closing plate (22) to the thrust bearing (21) of grinding ring (11).

2. A rim propeller with an axial magnetic field according to claim 1, characterised in that the chute (41) is arranged at an angle α to the axial direction of the rotor (1), where 0 < α ≦ 25.

3. A rim thruster for an axial magnetic field according to claim 1, characterized in that the water-lubricated thrust bearings (21) and the water-lubricated radial bearings (4) are plain bearings made of polymer material.

4. A rim propeller for an axial magnetic field according to claim 1, characterized in that the conduit (5) is a streamlined outer rim surface.

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