CN210258797U

CN210258797U - Non-resonance magnetic suspension mute submarine propeller

Info

Publication number: CN210258797U
Application number: CN201921019048.1U
Authority: CN
Inventors: 陈宇轩
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2020-04-07
Anticipated expiration: 2029-07-03

Abstract

The utility model provides a by magnetic suspension motor stator, and rotor, return bend, the assembly of tail cone constitution to and the no resonance magnetic suspension silence submarine propeller that amortization cover constitutes which characterized in that: the elbow 24 has a water inlet 13, the pipe orifice is arc-shaped, and the water outlet 14, the pipe orifice is an oblique section, a plurality of elbows 24 form an elbow group, and the water inlet 13 points to the axis, the pipe of the water inlet 13 part has an included angle 22 with the radial radius line of the axis, the angle is between 15 degrees and 75 degrees, the plurality of elbows 24 form an elbow group, the second elbow 24 lags behind the first elbow 24 in the axial direction of the main shaft, the third elbow 24 lags behind the second elbow 24 in the axial direction of the main shaft, and so on, the positions of the water inlets 13 also lag behind in sequence, but the water outlets 14 of all elbows 24 are parallel and level, which causes the difference of the total length of each elbow 24, and the plurality of elbow groups surround the axis of the main shaft for a circle.

Description

Non-resonance magnetic suspension mute submarine propeller

Technical Field

The utility model relates to a submarine propeller which consists of a magnetic suspension motor stator, a rotor, a bent pipe and a tail cone and a silencing cover.

Background

In the prior art, some submarine propellers rotate by adopting a centrifugal runner, apply centrifugal force to water and then spray out from a water outlet to provide advancing power for the submarine. When the centrifugal runner rotates, the edge of the impeller and water impact each other, the noise is high, a cavitation phenomenon can be generated, cavitation erosion can be generated on the impeller, and the efficiency can be reduced. And the blades on the impeller have the same size and the same resonant frequency, so that the blades impact with water to form resonant noise. Generally speaking, the existing submarine propeller has high noise, low efficiency and short service life. For example, a centrifugal pump propulsion system with the patent number of CN201721501263 and a self-coupling ship submersible pump jet propulsion device with the patent number of CN201910298430, which replaces a propeller. They employ circular centrifugal impellers having blades of substantially the same size. Not only the impeller and water impact each other to generate serious noise when rotating, but also the impeller and water impact each other to generate noise resonance phenomenon. The high-speed rotation of the impeller can also cause water to generate cavitation bubbles, the cavitation bubbles are broken to generate noise, and the propelling efficiency of the submarine propeller is reduced. Cavitation bubbles can also cause cavitation to the impeller, resulting in a shortened impeller life. Because the diameter of the position of the impeller close to the axis is small, the gap between the impellers is narrow, the diameter of the position far away from the axis is large, and the gap between the impellers is large, the flow speed of water is changed, the change of the flow speed also causes the change of water pressure, and noise is generated. The friction phenomenon when the wheel shaft of the impeller rotates also generates noise and vibration. The noise of the propeller is high, the probability that the submarine submerged in China is detected by enemies is increased, the sailing mileage of the submarine is shortened due to low efficiency of the propeller, and the service life of the propeller is shortened due to cavitation erosion of the impeller.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a propulsion is efficient, can not mutually strike with water when the propeller is high-speed rotatory, also can not produce vacuole and cavitation, and noise at work is low, and the multitube reposition of redundant personnel does not strike and influence mutually between the rivers, can not produce the resonance noise, and the water velocity of propeller work part is even, and water pressure is balanced, and the service life limit is long, the submarine propeller that the electromagnetic wave radiation is few. The above problems in the background art are solved.

The technical scheme of the utility model is that: the non-resonance magnetic suspension mute submarine propeller is composed of a magnetic suspension motor stator fixed on a main shaft, a rotor, a bent pipe and a tail cone which are made into a combined body, the combined body is driven by electric power to rotate around the stator in a magnetic suspension state, water in the bent pipe flows at a high speed under the action of centrifugal force to form thrust, and an outermost silencing cover.

The elbow pipe is provided with a water inlet and a water outlet, the mouth of the water inlet pipe is arc-shaped, and the water outlet is an oblique section. The bent pipes are arranged on the radial circumference part which is centered with the main shaft, the water inlet part of the bent pipes points to the shaft center, and the included angle between the water inlet part of the bent pipes and the radius line is 15-90 degrees. The water outlet part of the bent pipe is parallel to the axis of the main shaft. The multiple bent pipes are in a group, the second bent pipe lags behind the first bent pipe in the axial direction of the main shaft, the third bent pipe lags behind the second bent pipe in the axial direction of the main shaft, and the like. However, the outlet portions of the elbow groups are flush, which causes the length of the elbows to be different, and the frequencies of the generated noise are different when water flows through the elbows, and the noise interferes and cancels each other due to the different frequencies. The multiple groups of bent pipes are arranged at the radial circumferential position of the axis of the main shaft, and the multiple groups of bent pipes, the tail cone and the magnetic suspension motor rotor are manufactured into a combined body. The stator of the magnetic suspension motor is fixed on the main shaft, and the stator coil generates a rotating magnetic field and a repulsive force under the electrified condition. The combined body is suspended by repulsive force of the stator in all directions and rotates at high speed, and the combined body does not contact with the main shaft during rotation, so that friction noise is not generated. The combined body rotates at a high speed, the bent pipes on the combined body form water channels, and water flow in the bent pipes flows to the water outlet at a high speed under the action of centrifugal force to form thrust. And the water inlet generates negative pressure phenomenon due to centrifugal force, and water is sucked into the bent pipe through the water inlet by the negative pressure and is continuously sprayed out of the water outlet. The opening of the water inlet is arc-shaped and is matched with the arc line on the surface of the inner wall of the water inlet cabin, and the opening of the water outlet is matched with the outer surface of the caudal vertebra, and both are smooth surfaces without any convex part. Therefore, when the combination body rotates, no impact with water is generated, and no noise is generated. The assembly can not generate cavitation when rotating, and can not cause cavitation cracking noise, and can not reduce the efficiency of the propeller. And cavitation bubbles can not be generated to cause cavitation erosion, and the service life of the propeller is shortened.

Because water has adhesive force, when the assembly rotates, the outer part has some rotating water flow. Therefore, the silencing cover is arranged outside the combination body, and is fixed at the tail of the submarine by the bracket and does not rotate. There is the centrifugal water course between amortization cover and the combination body, and the rotatory rivers that the combination body surface produced are under the effect of centrifugal force, and are spout backward along the centrifugal water course, have increased propeller thrust, have retrieved the energy that consumes for the adhesion between water and the combination body surface of offsetting, have increaseed the utilization ratio of kinetic energy, have increased the efficiency of propeller. The noise reduction cover is arranged on the outermost layer of the propeller and is made of noise reduction materials, and the noise of the stator, the combination body, the bent pipe and the centrifugal water channel inside the noise reduction cover is further reduced under the action of the noise reduction cover. The noise reduction cover also shields a part of electromagnetic waves generated when the propeller rotates.

Drawings

Fig. 1 is a structural view of an elbow.

FIG. 2 is a view showing the mutual positions of the elbow and the spindle axis.

Fig. 3 is a view showing the mutual positions of the elbow pipe group and the spindle axis.

Fig. 4 is a view of the mutual positions of the individual bends of the bend group.

FIG. 5 is a front view of a plurality of bent tubes surrounding the axis of the spindle.

Fig. 6 is a perspective view of a layout of all the elbow stacks around one turn.

Fig. 7 is a diagram of the mutual positions of the inlet of the elbow and the inner wall of the inlet chamber.

FIG. 8 is a side cross-sectional view of a submarine propeller.

FIG. 9 is a cut-away position view of the submarine propeller.

Fig. 10 is a sectional view taken along line a-a of fig. 9.

Fig. 11 is a sectional view taken along line B-B of fig. 9.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 illustrates the structure of a bent pipe. The elbow 24 is provided with a water inlet 13, and the pipe orifice is arc-shaped. And a water outlet 14, wherein the pipe orifice is an inclined section. And an arcuate bend 19. The diameters of the cross sections of all parts of the whole elbow 24 are the same, and when water flows in the elbow 24, the water flow speed is uniform and the water pressure is constant.

Fig. 2 illustrates the mutual positions of the elbow and the spindle axis. The water inlet 13 of the elbow 24 is partially directed to the axis of the main shaft 1, and the pipe orifice of the water inlet 13 is arc-shaped and is matched with the arc line of the inner wall 23 of the water inlet cabin. So that the pipe orifice of the water inlet 13 can not impact with water when the elbow pipe 24 rotates around the main shaft. And the pipeline of the water inlet 13 part has an included angle 22 with the radial radius line of the shaft center, and the angle is between 15 and 75 degrees. When the elbow pipe rotates along the axis, the water in the inlet 13 part of the elbow pipe 24 forms centrifugal force under the action of rotation. The included angle 22 enables the water entering the water inlet 13 to obtain an outward thrust in addition to a centrifugal force, so that the water flow speed is increased.

Fig. 3 illustrates the mutual positions of the elbow pipe group and the spindle shaft center. The plurality of bent pipes 24 constitute a bent pipe group, and the water inlets 13 are all directed toward the shaft center.

Fig. 4 illustrates the mutual positions of the individual bends of the bend array. A plurality of bent pipes 24 constitute a bent pipe group, a second bent pipe 24 is behind the first bent pipe 24 in the axial direction of the main shaft, a third bent pipe 24 is behind the second bent pipe 24 in the axial direction of the main shaft, and so on. The position of each water inlet 13 also lags behind one another. But the outlets 14 of all the elbows 24 are flush. Because the circumference of the circumference is large outside and small inside, all the elbows 24 cannot be placed inside the circumference under the condition that the elbows 24 are fully arranged on the circumference line and the diameter of the water inlet 13 is unchanged. The elbows 24 are staggered axially one after the other to avoid the inlet ports 13 from becoming congested. The diameters of all parts of the elbow pipe 24 are the same, so that the water flow in the elbow pipe 24 is ensured to be uniform in flow speed and constant in water pressure. Also, the axial position of the elbows 24 is sequentially behind, but the outlets 14 are flush, which results in a difference in the overall length of each elbow 24. The bends 24 are of different lengths so that the resonant frequencies of the bends 24 are different. When water flows under the action of centrifugal force, the water enters from the water inlet 13 of each bent pipe 24, passes through the arc-shaped bent pipe 19 and flows out through the water outlet 14. Since the resonance frequency of each bent pipe 24 is different, the resonance phenomenon is not generated. The water flow noise generated by the bent pipe 24 can be offset due to different frequencies, and the noise is reduced. The bent pipe group is different from a common centrifugal impeller in nature, water is thrown out by the centrifugal impeller and then gathered together, the water is sprayed out by a water discharge pipe to provide thrust, and when the water flows are gathered together, mutual impact, cavitation and noise can be generated. Each bent pipe 24 is an independent water channel, and water enters from the water inlet 13 and is sprayed out from the water outlet 14 without any mixing and collection, so that the water flows do not impact each other, and noise is not generated due to the impact of the water flows.

Fig. 5 and 6 illustrate a state in which a plurality of bent pipes surround the shaft center.

Fig. 7 illustrates the mutual positions of the inlet of the elbow and the inner wall of the inlet chamber. The inner wall 23 of the intake compartment 12 of the intake compartment is unfolded and laid flat. The mouth of the water inlet 13 is completely matched with the inner wall 23 of the water inlet cabin, and the contact surface of the water inlet 13 and water is smooth. The pipe orifice of the water inlet 13 and water cannot impact each other when the water inlet rotates at a high speed, and noise and cavitation are reduced. The generation of cavitation noise and cavitation erosion is also avoided. The pipe orifices of the water inlets 13 are spaced apart from each other to prevent the pipe orifices from being close to each other, so that a flute-blowing effect is generated when water flows through the pipe orifices, and a whistle is generated.

Figure 8 depicts a side cross-sectional view of a submarine propeller.

Figure 9 depicts a cutaway position view of a submarine propeller. Wherein, two slicing positions are respectively an A-A slicing position and a B-B slicing position. The two sections can fully show the relation among all parts of the water inlet cabin 12 and the relation among all parts of the magnetic suspension motor driving position.

Figure 8 depicts a side cross-sectional view of a submarine propeller. Fig. 10 illustrates a cross-sectional view a-a of fig. 9. Fig. 11 illustrates a cross-sectional view B-B of fig. 9. The following detailed description will be made with reference to these 3 figures. The main shaft 1 is fixed at the tail part of the submarine 20, and the first stator 2, the second stator 3 and the third stator 4 of the magnetic suspension motor are fixed on the main shaft 1. The rotor of the magnetic levitation motor, the elbow 24, and the tail cone 11 are assembled together to form the assembly 8. The magnetic suspension motor rotor and the bent pipe 24 are made into a whole, and the tail cone 11 is made into a split body, so that the submarine propeller is convenient to manufacture, assemble, disassemble and maintain. The combination 8 can be rotated on the spindle 1. The assembly 8 has a cylindrical cavity in the middle, and the first stator 2, the second stator 3 and the third stator 4 are arranged in the cylindrical cavity. The assembly 8 has a first shaft hole 9 and a second shaft hole 10. The first stator 2 inside can provide a rotating magnetic field for the combined body 8 and can also provide a radial repulsive force for the combined body 8 under the electrified working state, so that the combined body 8 is in a completely suspended state while rotating, is not in contact with the first shaft hole 9 and the second shaft hole 10, has no friction phenomenon in the rotating process, and does not generate noise. When the second stator 3 and the third stator 4 are in the electrified working state, not only a rotating magnetic field can be provided for the combined body 8, but also an axial repulsive force can be provided for the combined body 8, so that the combined body 8 is in a completely suspended state while rotating, does not move axially, is not in contact with the main shaft 1, the second stator 3 and the third stator 4, has no friction phenomenon in the rotating process, and does not generate noise. The shaft stop 5 and the shaft stop 6 are arranged on the main shaft 1 to prevent the combined body 8 from axially moving in a non-working and non-suspension state. The water filtering material 7 is arranged in front of the first shaft hole 9, so that impurities and marine organisms can be filtered out from seawater entering the cylindrical cavity when the submarine 20 submerges, the entering seawater not only can play a role in cooling the magnetic suspension motor, but also enables the internal and external water pressures of the magnetic suspension motor to be the same, and the phenomenon that when the submarine 20 enters deep water, the difference between the internal and external water pressures is increased, and the combined body 8 is crushed by the water pressure is avoided. Outside the combined body 8 is a silencing cover 18, and the silencing cover 18 is fixed at the tail part of a submarine 20 by a bracket 21. Due to the adhesion of water, the assembly 8 rotates with some rotating water flow on the outside. Therefore, the silencing cover 18 is arranged outside the combination body, and the silencing cover 18 is fixed at the tail of the submarine 20 by a bracket and does not rotate. A centrifugal water channel 16 is arranged between the silencing cover 18 and the combined body 8, and the rotating water flow generated on the outer surface of the combined body 8 flows backwards along the centrifugal water channel 16 under the action of centrifugal force and is sprayed out from a water channel opening 17, so that the thrust of the propeller is increased, the energy consumed for counteracting the adhesive force between water and the outer surface of the combined body is recovered, the utilization rate of kinetic energy is increased, and the efficiency of the propeller is increased. The silencing cover 18 is arranged on the outer layer of the propeller and is made of silencing materials, and the noise of the first stator 2, the second stator 3, the third stator 4, the combined body 8 and the centrifugal water channel 16 inside the silencing cover is further reduced under the action of the silencing cover 18. The noise dampening housing 18 also shields a portion of the electromagnetic waves generated when a portion of the propeller is rotated. When the propeller rotates, the combined body 8 is pushed by the rotating magnetic field of the first stator 2, the second stator 3 and the third stator 4 to generate a rotating moment and a suspension force, so that the main shaft 1 and the combined body 8 are not contacted with each other, and frictional resistance and frictional noise are avoided. The bent pipe 24 rotates at a high speed at the same time, and the water inside generates centrifugal force and is ejected out of the water outlet 14 at a high speed to generate thrust. And negative pressure is generated at the water inlet 13 of the elbow pipe 24, and water in the water inlet cabin 12 is sucked into the elbow pipe 24 by the negative pressure and is circulated continuously. The pipe orifice of the water inlet 13 of the elbow 24 is arc-shaped and is fully matched with the inner wall 23 of the water inlet cabin 12, and the pipe orifice of the water outlet 14 is an oblique section and is fully matched with the outer surface of the caudal vertebra 11. The combination body 8 has no protrusion at the place contacting with water, is round and smooth surface, has no mutual impact with water, and can not generate noise and cavitation. Each elbow 24 is a separate water flow channel, and water enters from the water inlet 13 and is sprayed from the water outlet 14, wherein the water flows in the respective elbows at a uniform flow rate and under a constant water pressure. The flowing process does not have any phenomenon that water flows impact each other. So that any noise and cavitation are not generated.

Claims

1. A resonance-free magnetic suspension mute submarine propeller is characterized in that: comprises a combination body (8), a first stator (2), a second stator (3), a third stator (4) and a silencing cover (18) of a magnetic suspension motor, wherein the combination body (8) comprises a magnetic suspension electric rotor, a bent pipe (24) and a tail cone (11), the bent pipe (24) is provided with a water inlet (13) which is arc-shaped and a water outlet (14), the pipe orifice is an oblique section, a plurality of bent pipes (24) form a bent pipe group, the water inlet (13) points to the axis, the pipeline of the water inlet (13) part and the radial radius line of the axis form an included angle (22) which is 15-75 degrees, the plurality of bent pipes (24) form a bent pipe group, the second bent pipe (24) is positioned behind the axial direction of a main shaft (1) compared with the first bent pipe (24), the third bent pipe (24) is positioned behind the axial direction of the main shaft (1) compared with the second bent pipe (24), by analogy, the positions of the water inlets (13) are sequentially behind, but the water outlets (14) of all the bent pipes (24) are flush, so that the total length of each bent pipe (24) is different, and a plurality of bent pipes surround the axis of the main shaft for one circle.

2. The non-resonance magnetic suspension mute submarine propeller according to claim 1, wherein: the pipe orifice of the water inlet (13) of the elbow (24) is arc-shaped and is fully matched with the inner wall (23) of the water inlet cabin (12), the pipe orifice of the water outlet (14) is an oblique section and is fully matched with the outer surface of the caudal vertebra (11), and the place where the combination body (8) is contacted with water has no projection and is a round smooth surface.

3. The non-resonance magnetic suspension mute submarine propeller according to claim 1, wherein: the main shaft (1) is fixed at the tail part of the submarine (20), a first stator (2), a second stator (3) and a third stator (4) of the magnetic suspension motor are fixed on the main shaft (1), the combination body (8) can rotate on the main shaft (1), a cylindrical cavity is arranged in the middle of the combination body (8), the first stator (2), the second stator (3) and the third stator (4) are arranged in the cylindrical cavity, and a first shaft hole (9) and a second shaft hole (10) are arranged on the combination body (8).

4. The non-resonance magnetic suspension mute submarine propeller according to claim 1, wherein: the outside of the combination body is provided with a silencing cover (18), the silencing cover (18) is fixed at the tail part of the submarine (20) by a bracket and does not rotate, and a centrifugal water channel (16) is arranged between the silencing cover (18) and the combination body (8).

5. The non-resonance magnetic suspension mute submarine propeller according to claim 1, wherein: the magnetic suspension motor rotor, the bent pipe (24) and the tail cone (11) are installed together to form a combined body (8).