Direct-driven water-jet propeller

Abstract

The utility model relates to the field of water-jet propellers, in particular to a direct-drive type water-jet propeller. Comprising a propeller shell and a shaftless motor, a water inlet end and a water outlet end are arranged at the two ends of the shaftless motor, a water inlet is formed in the water inlet end, a water outlet is formed in the water outlet end, a steering spray head and a brake elbow are arranged on the water outlet, paddles are arranged on a rotating body of an inner ring of the shaftless motor, and the shaftless motor is fixedly connected with the water inlet end and the water outlet end. The shaftless motor is powered on to rotate the rotating body to suck water at the water inlet end and discharge the water from the water outlet end, and the brake elbow moves to change the axial direction of water flow at the water outlet end. The shaftless motor is used, small foreign matters are not afraid, meshes of the water filter screen can be large, the water inlet amount is increased, and foreign matter blockage is reduced; by using the shaftless motor, a lengthened transmission shaft is not needed to install the paddle, the length of a bent pipe water channel is reduced, the water flow path is reduced, the efficiency of converting electric energy of the motor into water flow kinetic energy is improved, and in addition, the transmission efficiency of the motor is directly driven and is higher than that of a long-rod transmission shaft and paddle structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to water jet propeller field especially relates to a direct drive type water jet propeller. BACKGROUND

[0002] Water jet propeller refers to the jet part of the propulsion mechanism is immersed in water, using the reaction force generated by the jet water flow to drive the ship forward. Its working principle is similar to the jet engine of the airplane, through the water pump water is sucked from the ship bottom hole, after accelerating through the side pipe, it is discharged from the back direction of the ship at high speed, thus generating thrust to push the ship forward.

[0003] The water jet propeller in the prior art adopts long rod transmission rod paddle as the transmission structure, needs long long rod transmission shaft with paddle blade driving, the transmission efficiency is not high, and there is also the problem of winding small foreign matters, so the mesh of the filter screen needs to be relatively small, thereby affecting the water inlet amount and reducing the kinetic energy efficiency.

[0004] Therefore, it is particularly important to design a direct drive type water jet propeller which adopts shaftless motor and is not afraid of winding small foreign matters. SUMMARY

[0005] The application provides a direct drive type water jet propeller, which adopts the following technical scheme:

[0006] A direct drive type water jet propeller comprises a propeller shell and a shaftless motor, the shaftless motor is provided with a water inlet end and a water outlet end at two ends, a water inlet is arranged on the water inlet end, a water outlet is arranged on the water outlet end, a deflection nozzle and a brake elbow are arranged on the water outlet, a paddle is arranged on a rotating body of an inner ring of the shaftless motor, the shaftless motor is fixedly connected with the water inlet end and the water outlet end, the rotating body is rotated by energization of the shaftless motor, water in the water inlet end is sucked and discharged from the water outlet end, and the brake elbow changes the axial direction of the water flow.

[0007] Optionally, motor flanges are arranged on two sides of the shaftless motor, and the shaftless motor is fixedly connected with the water inlet end and the water outlet end through the flanges.

[0008] Optionally, the water inlet end comprises a pipeline, a filter screen in the form of a strip-shaped grid is arranged on the bottom side of the pipeline, and a pipeline flange is arranged on the pipeline.

[0009] Optionally, the water outlet end comprises a booster nozzle, the booster nozzle has a large inlet end and a small outlet end, and a nozzle flange is arranged on the inlet end of the booster nozzle.

[0010] Optionally, rotating shafts are arranged on two side edges of the booster nozzle, a deflection nozzle positioning column is arranged on the outlet end of the booster nozzle, and a deflection nozzle is arranged on the deflection nozzle positioning column.

[0011] Optionally, the brake elbow is provided with an elbow pipe and a connecting rod, and the connecting rod is arranged on the rotating shaft of the pressurizing nozzle.

[0012] Optionally, the elbow pipe on the brake elbow is symmetrically arranged on both sides, and a water outlet passage is arranged in the elbow pipe, and the elbow pipe is in a circular arc shape.

[0013] Optionally, the shaftless motor is arranged in a ring shape, and a motor outlet is arranged on the ring surface of the shaftless motor, and a rotor assembly and a sealing assembly are arranged in the shaftless motor, the rotor assembly comprises a stator core, the stator core is fixed on the inner shell of the shaftless motor, a copper winding group is arranged in the stator core, a rotor core is arranged on the inner ring of the stator core, and the stator core and the rotor core are in contact with each other.

[0014] Optionally, a plurality of paddles are arranged on the inner ring surface of the rotating body, and the plurality of paddles are uniformly arranged on the rotating body, and the number of the arranged paddles is 3-9.

[0015] Optionally, rotating assemblies are arranged on both sides of the rotor assembly, bearings are arranged on the rotating assemblies, sealing structures are arranged on the bottom sides of the bearings, the sealing structures comprise mirror ring bases, the mirror ring bases are connected with the bearings, the mirror ring bases are connected with the rotating body, mirror rings are arranged on the side edges of the mirror ring bases, and water seals are arranged above the mirror rings.

[0016] Optionally, mirror ring fixing rings are arranged on the side edges of the mirror rings, the mirror ring fixing rings fix the mirror rings on the mirror ring bases, and the mirror rings, the mirror ring bases and the mirror ring fixing rings are connected through screws.

[0017] Compared with the prior art, the device has the advantages that:

[0018] 1. The device uses a shaftless motor, which is not afraid of winding and small foreign matters, the filter net mesh can be large, the water inflow is increased, and the foreign matter blockage is reduced.

[0019] 2. The shaftless motor does not need to use a long transmission shaft to install paddles, the length of the elbow pipe water channel is greatly reduced, the water flow path is greatly reduced, the efficiency of converting motor electric energy into water flow kinetic energy is greatly improved, and on the other hand, the transmission efficiency of the motor is also higher than that of the structure of the long rod transmission shaft plus paddles.

[0020] 3. The shaftless motor does not need to use a transmission shaft between the water jet propeller and the external box body, which saves the structure and improves the transmission efficiency of the motor, the brake elbow provides the power device with a brake function, and the steering nozzle provides the power device with a steering function. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will describe the drawings needed to be used in the embodiments or prior art description, obviously, the technical solutions described in the description of the drawings are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] Figure 1 It is the overall structure diagram of the present application.

[0023] Figure 2 It is the overall structure top view of the present application.

[0024] Figure 3 It is the overall structure bottom view of the present application.

[0025] Figure 4 It is the explosion diagram of the present application.

[0026] Figure 5 It is the sectional view of the present application.

[0027] Figure 6 It is the schematic diagram of the shaftless motor of the present application.

[0028] Figure 7 It is the sectional schematic diagram of the shaftless motor of the present application.

[0029] Figure 8 It is the enlarged schematic diagram of A area of the present application.

[0030] Figure 9 It is the schematic diagram of the brake elbow of the present application.

[0031] In the figure: 1, pipeline; 101, pipeline flange; 2, shaftless motor; 201, motor flange; 202, motor outlet; 203, bearing; 204, paddle; 205, stator core; 206, mirror ring base; 207, water seal; 208, mirror ring; 209, mirror ring fixing ring; 3, booster nozzle; 301, nozzle flange; 4, filter screen; 5, steering nozzle; 6, brake elbow; 601, elbow; 602, connecting rod; 7, steering nozzle positioning column. DETAILED DESCRIPTION

[0032] The technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings, obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, 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 intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] An embodiment of this utility model provides a direct-drive waterjet propulsion device.

[0036] Example: Figures 1-9 As shown, a direct-drive water jet propulsion device includes a propulsion housing and a shaftless motor 2. The shaftless motor 2 has an inlet end and an outlet end at both ends. The inlet end is provided with an inlet port, and the outlet end is provided with an outlet port and a brake elbow 6. The inner ring of the shaftless motor 2 has a blade 204 on its rotating body. The shaftless motor 2 is fixedly connected to the inlet end and the outlet end. When the shaftless motor 2 is energized, it rotates the rotating body to draw water from the inlet end and discharge it from the outlet end. The brake elbow 6 is lowered to change the axial direction of the water flow.

[0037] The water inlet end comprises a pipeline 1, a filter screen 4 arranged on the bottom side of the pipeline 1, the filter screen 4 being a strip-shaped grid, a pipeline flange 101 arranged on the pipeline 1, an axleless motor 2 arranged on the side of the pipeline 101, one end of the pipeline 1 being connected with the axleless motor 2 being a circular hole; motor flanges 201 arranged on both sides of the axleless motor 2, a pressurized nozzle 3 arranged on the other side of the axleless motor 2, the pressurized nozzle 3 being connected with one side of the axleless motor 2 being provided with a nozzle flange 301, the motor flanges 201 at both ends of the axleless motor 2 being connected and fixed with the pipeline flange 101 and the nozzle flange 301 through bolts and nuts, so as to realize the completion of the main body of the water jet propeller; the pressurized nozzle 3 is designed as a large inlet end and a small outlet end, the inlet end surface is fixedly connected with the axleless motor 2, rotating shafts are arranged on both side edges of the pressurized nozzle 3, a steering nozzle positioning column 7 is arranged at the outlet end of the pressurized nozzle 3, a steering nozzle 5 is arranged on the steering nozzle positioning column 7, the steering nozzle 5 can change the water flow direction, so as to change the ship advancing direction. Brake elbows 6 are arranged on the rotating shafts on the side edges of the pressurized nozzle 3, the brake elbows 6 are provided with elbow pipes 601 and connecting rods 602, the connecting rods 602 are arranged on the rotating shafts on the side edges of the pressurized nozzle 3, so that the brake elbows 6 can be turned up and down, the elbow pipes 601 on the brake elbows 6 are symmetrically arranged on both sides, water outlet passages are arranged in the elbow pipes 601, the elbow pipes 601 are arc-shaped, and water flow can be discharged from the middle to both ends.

[0038] The axleless motor 2 is arranged in a ring shape, motor outlets 202 are arranged on the ring surface of the axleless motor 2, a rotor assembly and a sealing assembly are arranged in the axleless motor 2, the rotor assembly comprises a stator core 205, the stator core 205 is fixedly arranged on the inner shell of the axleless motor 2, copper winding groups are arranged in the stator core 205, a rotor core is arranged on the inner ring of the stator core 205, there is a gap between the stator core 205 and the rotor core without contact, a rotor magnet is arranged on the rotor core, the rotor core is arranged on the rotating body of the axleless motor 2, a plurality of blades 204 are arranged on the inner ring surface of the rotating body, the plurality of blades 204 are uniformly arranged on the rotating body, and the number of the blades 204 can be 3-9; the copper winding groups in the stator core 205 are coated after being wound in the stator core 205, the copper winding groups are coated in the stator core 205, and the wires on the copper winding groups are extended out of the motor outlets 202 to be connected with an external power supply.

[0039] The rotating assembly is provided with a bearing 203, which is an angular contact ball bearing and can simultaneously bear radial load and axial load, for supporting the rotor, reducing the friction coefficient during movement of the rotor, and ensuring the rotation accuracy. The bottom side of the bearing 203 is provided with a sealing structure, which comprises a mirror ring base 206 connected with the bearing 203, and the mirror ring base 206 is also connected with a rotating body. A sealing ring is arranged between the mirror ring base 206 and the rotating body. A bearing inner ring gasket is arranged between the inner side of the bearing 203 and the mirror ring base 206. A mirror ring 208 is arranged on the side of the mirror ring base 206, and a mirror ring base outer sealing ring is arranged between the mirror ring 208 and the mirror ring base 206. A water seal 207 is arranged above the mirror ring 208, which can isolate the liquid circulation between the inside and outside of the motor and play a waterproof role. The surface roughness of the contact surface of the mirror ring 208 is low, and the rotating body of the water seal 207 is in close contact with the mirror ring 208, so as to reduce the dynamic friction resistance when the motor and the water seal 207 rotate. A mirror ring fixing ring 209 is arranged on the side of the mirror ring 208, and the mirror ring fixing ring 209 fixes the mirror ring 208 on the mirror ring base 206. The mirror ring 208, the mirror ring base 206 and the mirror ring fixing ring 209 are connected by screws.

[0040] The motor housing is arranged on both sides of the shaftless motor 2, and the motor housing is provided with a motor flange 201. The motor housing covers the inside of the shaftless motor, so that a sealed cavity is formed in the inside of the shaftless motor 2. The friction between the moving parts in the cavity can be greatly reduced by injecting lubricating oil into the cavity. On the other hand, the liquid itself has the characteristic of being incompressible, and the cavity filled with lubricating oil can support the cavity from being deformed by water pressure in deep water. When injecting oil, the shaftless motor 2 is immersed in lubricating oil, and then the motor housing is installed on both sides to fix the shaftless motor 2, so as to realize the injection of lubricating oil into the inside of the shaftless motor 2. Because the stator core 205 is fixedly installed on the shell of the shaftless motor 2, the opening position of the motor outlet 202 on the shaftless motor 2 is also in the position part of the stator core 205, so that the wire can be directly drawn out from the opening, and the lubricating oil injected in the inside will not overflow.

[0041] Working principle: the water jet propeller is installed on the tail of the ship, the water inlet of the water jet propeller pipe 1 is towards the water, that is, the filter screen 4 on the pipe 1 is installed in the water, the filter screen 4 can block foreign matters in the water from being sucked in; the motor flange 201 on the shaftless motor 2 is connected and fixedly installed on both sides of the pipe flange 101 and the nozzle flange 301, the booster nozzle 3 is provided with a brake elbow 6 which can be turned up and down and a steering nozzle 5 which can be turned left and right. When in use, the shaftless motor 2 is powered, the copper winding group in the stator core 205 of the shaftless motor 2 is powered to generate a magnetic field, under the action of the magnetic field, the rotor core is driven to rotate, thereby driving the rotating body to rotate, the rotating body rotates the paddle 204 on the inner ring surface thereof, the water entering the pipe 1 is driven to move towards the booster nozzle 3, the booster nozzle 3 has a large inlet and a small outlet, therefore the water flow pressure from the booster nozzle is increased to drive the ship to move forward, at the same time, the direction can be changed by adjusting the steering nozzle 5, the moving direction of the ship is changed, and the water flow axial direction of the booster nozzle 3 can be changed by lowering the brake elbow 6, the water flow is discharged through the elbow pipe 601 to achieve the effect of decelerating the ship.

[0042] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive. The scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and range of equivalents of the elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be regarded as limiting the claims to which they belong.

[0043] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A direct drive water jet propulsor characterized by: The application relates to a propeller shell and a shaftless motor (2), the shaftless motor (2) is provided with a water inlet end and a water outlet end at two ends, a water inlet is arranged on the water inlet end, a water outlet is arranged on the water outlet end, a steering nozzle (5) and a brake elbow (6) are arranged on the water outlet, paddles (204) are arranged on the rotating body of the inner ring of the shaftless motor (2), the shaftless motor (2) is fixedly connected with the water inlet end and the water outlet end, the shaftless motor (2) is powered to rotate the rotating body to suck water from the water inlet end and discharge the water from the water outlet end, and the brake elbow (6) can change the axial direction of the water flow from the water outlet end.

2. A direct drive water jet propulsor according to claim 1, characterized in that: Motor flanges (201) are arranged on the two sides of the shaftless motor (2), and the shaftless motor (2) is fixedly connected with the water inlet end and the water outlet end through the flanges.

3. A direct drive water jet propulsor according to claim 1, characterized in that: The water inlet end comprises a pipeline (1), a filter screen (4) is arranged on the bottom side of the pipeline (1), the filter screen (4) is a strip-shaped grid, and a pipeline flange (101) is arranged on the pipeline (1).

4. A direct drive water jet propulsor according to claim 1, characterized in that: The water outlet end comprises a booster nozzle (3), the booster nozzle (3) is large at the inlet end and small at the outlet end, and a nozzle flange (301) is arranged on the inlet end of the booster nozzle (3).

5. A direct drive water jet propulsor according to claim 4, characterized in that: Rotating shafts are arranged on the two sides of the booster nozzle (3), a steering nozzle positioning column (7) is arranged on the outlet end of the booster nozzle (3), and a steering nozzle (5) is arranged on the steering nozzle positioning column (7).

6. A direct drive water jet propulsor according to claim 5, characterized in that: A bend pipe (601) and a connecting rod (602) are arranged on the brake elbow (6), the connecting rod (602) is arranged on the rotating shaft of the booster nozzle (3), the bend pipe (601) is symmetrically arranged on the two sides of the brake elbow (6), a water outlet passage is arranged in the bend pipe (601), and the bend pipe (601) is in the shape of an arc.

7. A direct drive water jet propulsor as claimed in claim 1, wherein: The shaftless motor (2) is arranged in a ring shape, motor outlet ports (202) are arranged on the ring surface of the shaftless motor (2), a rotor assembly and a sealing assembly are arranged in the shaftless motor (2), the rotor assembly comprises a stator core (205), the stator core (205) is fixedly arranged on the inner housing of the shaftless motor (2), a copper winding group is arranged in the stator core (205), a rotor core is arranged on the inner ring of the stator core (205), and a gap exists between the stator core (205) and the rotor core without contact.

8. A direct drive waterjet as defined in claim 1, wherein: A plurality of paddles (204) are arranged on the inner ring surface of the rotating body, the plurality of paddles (204) are uniformly arranged on the rotating body, and the number of the arranged paddles (204) is 3-9.

9. A direct drive waterjet as defined in claim 7, wherein: Rotating assemblies are arranged on the two sides of the rotor assembly, bearings (203) are arranged on the rotating assemblies, sealing structures are arranged on the bottom sides of the bearings (203), the sealing structures comprise mirror ring bases (206), the mirror ring bases (206) are connected with the bearings (203), the mirror ring bases (206) are connected with the rotating body, mirror rings (208) are arranged on the side edges of the mirror ring bases (206), and water seals (207) are arranged above the mirror rings (208).

10. A direct drive waterjet as claimed in claim 9, characterized in that: Mirror ring fixing rings (209) are arranged on the side edges of the mirror rings (208), the mirror ring fixing rings (209) fix the mirror rings (208) on the mirror ring bases (206), and the mirror rings (208), the mirror ring bases (206) and the mirror ring fixing rings (209) are connected through screws.

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