Variable-frequency propulsion device for ship

Abstract

The utility model discloses a ship variable frequency propulsion device which comprises a fixing column, a variable frequency motor assembly is arranged at the bottom of the fixing column, the variable frequency motor assembly and the fixing column are fixedly connected through a first connecting column, and a propeller is fixedly connected to the tail end of an output shaft of the variable frequency motor assembly. The outer surface of the propeller is sleeved with a fixing sleeve, the upper end of the fixing sleeve is fixedly connected with a fixing column through a connecting rod, and the bottom of the fixing sleeve is fixedly connected with a variable frequency motor assembly through two second connecting columns. The interior of the sound insulation plate is in a vacuum state, the sound insulation plate is of an annular structure and surrounds the variable frequency motor assembly and the propeller which generate noise, the noise generated by the variable frequency motor assembly and the propeller is guided, the noise is transmitted out from the two ends of the sound insulation plate, and the noise transmitted upwards is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ship propulsion equipment, in particular to a ship variable frequency propulsion device. Background Art

[0002] As a new system, the ship electric propulsion system is mainly composed of prime movers, generators, distribution boards, transformers, frequency converters, motors, propellers, control systems, etc. The prime mover mainly drives the generator to generate electricity through a diesel engine or gas turbine. The distribution board distributes the generated electricity, transmits it to the transformer for voltage regulation, and then transmits it to the frequency converter for rectification and inversion. Finally, the electrical energy is transmitted to the motor to drive the propeller to propel the ship.

[0003] However, the existing variable frequency propulsion device of a ship lacks noise reduction processing when in use. When the motor and the rotating propeller are working, very loud noise will be generated, which will cause great interference to the people on the ship and affect the user's boating experience. Therefore, a variable frequency propulsion device for a ship is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a ship variable frequency propulsion device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ship variable frequency propulsion device, comprising a fixed column, a variable frequency motor assembly is arranged at the bottom of the fixed column, the variable frequency motor assembly and the fixed column are fixedly connected by a No. 1 connecting column, a propeller is fixedly connected to the end of the output shaft of the variable frequency motor assembly, a fixed sleeve is sleeved on the outer surface of the propeller, the upper end of the fixed sleeve is fixedly connected to the fixed column by a connecting rod, the bottom of the fixed sleeve is fixedly connected to the variable frequency motor assembly by two No. 2 connecting columns, a sound insulation board is arranged inside the fixed sleeve, the sound insulation board is an annular plate, the interior of the sound insulation board is a hollow structure, an exhaust hole is arranged at the rear end of the sound insulation board, an automatic opening and closing mechanism is arranged in the exhaust hole, the No. 1 connecting column and the two No. 2 connecting columns all penetrate the sound insulation board and are fixedly connected to the sound insulation board.

[0006] As a further preferred embodiment of the present technical solution, the automatic opening and closing mechanism is composed of a return spring and a sealing block. The sealing block is slidably installed in a slide groove opened inside the sound insulation board. The slide groove crosses the exhaust hole. A return spring is fixedly connected between the sealing block and the inner wall of the slide groove.

[0007] As a further preferred embodiment of the present technical solution, the end surface of the sealing block away from the return spring is inclined.

[0008] As a further preferred embodiment of the present technical solution, a sealing strip is provided at the edge of the sealing block.

[0009] As a further preferred embodiment of the present technical solution, a plurality of reinforcement rings are sleeved on the outer surface of the sound insulation board, and the plurality of reinforcement rings are distributed at equal intervals.

[0010] As a further preferred embodiment of the present technical solution, a connecting plate is fixedly connected to the upper end of the fixing column, and a plurality of connecting holes are formed on the connecting plate, and the plurality of connecting holes are arranged in a ring array.

[0011] As a further preferred embodiment of the present technical solution, the No. 1 connecting column and the two No. 2 connecting columns are distributed in a ring array.

[0012] The utility model provides a ship variable frequency propulsion device, which has the following beneficial effects:

[0013] The utility model can extract the air inside the sound insulation board through the external exhaust equipment, so that the inside of the sound insulation board is in a vacuum state. The sound insulation board is a ring structure, and surrounds the variable frequency motor assembly and the propeller that emit noise, and guides the noise emitted by the variable frequency motor assembly and the propeller, so that the noise is transmitted from both ends of the sound insulation board, and the noise transmitted upward is slowed down, thereby having a noise reduction effect on people on the ship. At the same time, through the automatic opening and closing mechanism arranged at the exhaust hole, the exhaust hole has the function of automatic opening and closing, making the exhaust equipment more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of another viewing angle of the overall structure of the utility model;

[0016] Figure 3 It is a front view of the overall structure of the utility model;

[0017] Figure 4 For this utility model Figure 2 The structural diagram of A in the figure;

[0018] Figure 5 For the utility model Figure 4 Schematic diagram of the internal structure;

[0019] In the figure: 1. Fixed sleeve; 2. Fixed column; 3. Connecting plate; 4. Connecting hole; 5. Propeller; 6. Sound insulation board; 7. Reinforcement ring; 8. Frequency conversion motor assembly; 9. Connecting column No. 1; 10. Connecting column No. 2; 11. Connecting rod; 12. Exhaust hole; 13. Reset spring; 14. Sealing block; 15. Slide groove; 16. Sealing strip. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] The utility model provides a technical solution: Figures 1 to 5 As shown, in this embodiment, a variable frequency propulsion device for a ship includes a fixed column 2, a variable frequency motor assembly 8 is arranged at the bottom of the fixed column 2, the variable frequency motor assembly 8 and the fixed column 2 are fixedly connected by a No. 1 connecting column 9, a propeller 5 is fixedly connected to the end of the output shaft of the variable frequency motor assembly 8, a fixed sleeve 1 is sleeved on the outer surface of the propeller 5, the upper end of the fixed sleeve 1 is fixedly connected to the fixed column 2 by a connecting rod 11, the bottom of the fixed sleeve 1 is fixedly connected to the variable frequency motor assembly 8 by two No. 2 connecting columns 10, a sound insulation board 6 is arranged inside the fixed sleeve 1, the sound insulation board 6 is an annular plate, the inside of the sound insulation board 6 is a hollow structure, the rear end of the sound insulation board 6 is arranged with an exhaust hole 12, the exhaust hole 12 is arranged with an automatic opening and closing mechanism, the No. 1 connecting column 9 and the two No. 2 connecting columns 10 all penetrate the sound insulation board 6 and are fixedly connected to the sound insulation board 6.

[0022] Among them, the automatic opening and closing mechanism is composed of a reset spring 13 and a sealing block 14. The sealing block 14 is slidably installed in a slide groove 15 opened inside the sound insulation board 6. The slide groove 15 crosses the exhaust hole 12. The reset spring 13 is fixedly connected between the sealing block 14 and the inner wall of the slide groove 15. The end face of the sealing block 14 away from the reset spring 13 is inclined.

[0023] When in use, the exhaust pipe of the exhaust device is inserted along the exhaust hole 12, and the end of the exhaust pipe will abut against the inclined surface of the sealing block 14, thereby generating an inclined force on the sealing block 14, causing the sealing block 14 to shift to the side of the exhaust hole 12 and compress the reset spring 13, thereby releasing the seal of the exhaust hole 12. When the exhaust device has evacuated the interior of the sound insulation board 6 into a vacuum, the exhaust pipe is pulled out, and under the action of the reset spring 13 restoring the deformation, the sealing block 14 will return to its original position, thereby blocking the exhaust hole 12 again, so that the exhaust hole 12 has the function of automatic opening and closing, which is more convenient to use.

[0024] A sealing strip 16 is provided at the edge of the sealing block 14 .

[0025] The sealing strip 16 can improve the sealing effect of the sealing block 14. It should be noted that although the existence of the sealing strip 16 will increase the resistance encountered by the sealing block 14 when moving, the resistance is small and within an acceptable range and does not affect the entry and exit of the exhaust pipe of the exhaust equipment.

[0026] The outer surface of the sound insulation board 6 is provided with a plurality of reinforcement rings 7 , and the plurality of reinforcement rings 7 are distributed at equal intervals.

[0027] The reinforcement ring 7 can provide the overall structural firmness of the sound insulation board 6 and prevent the sound insulation board 6 from being deformed under the impact of water flow.

[0028] The upper end of the fixing column 2 is fixedly connected with a connecting plate 3 , and a plurality of connecting holes 4 are formed on the connecting plate 3 , and the plurality of connecting holes 4 are arranged in a ring array.

[0029] The device can be connected to a ship via the provided connecting plate 3.

[0030] The No. 1 connecting column 9 and the two No. 2 connecting columns 10 are distributed in a ring array.

[0031] Such an arrangement can improve the strength of the overall structure of the device.

[0032] The utility model provides a ship variable frequency propulsion device, the specific working principle is as follows:

[0033] The air inside the sound insulation board 6 can be sucked out by an external exhaust device, so that the inside of the sound insulation board 6 is in a vacuum state. The sound insulation board 6 is a ring structure, and surrounds the variable frequency motor assembly 8 and the propeller 5 that make noise, and guides the noise emitted by the variable frequency motor assembly 8 and the propeller 5, so that the noise is transmitted from both ends of the sound insulation board 6, and the noise transmitted upward is slowed down, thereby having a noise reduction effect on people on the ship. At the same time, the automatic opening and closing mechanism is arranged at the exhaust hole 12, so that the exhaust hole 12 has the function of automatic opening and closing, making the exhaust equipment more convenient to use.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable frequency propulsion device for a ship, comprising a fixing column (2), characterized in that: A variable frequency motor assembly (8) is arranged at the bottom of the fixed column (2), and the variable frequency motor assembly (8) is fixedly connected to the fixed column (2) via a first connecting column (9). A propeller (5) is fixedly connected to the end of the output shaft of the variable frequency motor assembly (8), and a fixed sleeve (1) is sleeved on the outer surface of the propeller (5). The upper end of the fixed sleeve (1) is fixedly connected to the fixed column (2) via a connecting rod (11), and the bottom of the fixed sleeve (1) is fixedly connected to the fixed column (2) via two connecting rods (11). The second connecting column (10) is fixedly connected to the variable frequency motor assembly (8); a sound insulation board (6) is arranged inside the fixed sleeve (1); the sound insulation board (6) is an annular board; the interior of the sound insulation board (6) is a hollow structure; an air extraction hole (12) is arranged at the rear end of the sound insulation board (6); an automatic opening and closing mechanism is arranged inside the air extraction hole (12); the first connecting column (9) and the two second connecting columns (10) all penetrate the sound insulation board (6) and are fixedly connected to the sound insulation board (6).

2. A variable frequency propulsion device for ships according to claim 1, characterized in that: The automatic opening and closing mechanism is composed of a return spring (13) and a sealing block (14); the sealing block (14) is slidably mounted in a slide groove (15) provided inside the sound insulation board (6); the slide groove (15) crosses the air extraction hole (12); and a return spring (13) is fixedly connected between the sealing block (14) and the inner wall of the slide groove (15).

3. A variable frequency propulsion device for ships according to claim 2, characterized in that: The end surface of the sealing block (14) away from the return spring (13) is arranged inclined.

4. A variable frequency propulsion device for ships according to claim 2, characterized in that: A sealing strip (16) is provided at the edge of the sealing block (14).

5. A variable frequency propulsion device for ships according to claim 1, characterized in that: The outer surface of the sound insulation board (6) is sleeved with a plurality of reinforcement rings (7), and the plurality of reinforcement rings (7) are distributed at equal intervals.

6. A variable frequency propulsion device for ships according to claim 1, characterized in that: The upper end of the fixing column (2) is fixedly connected to a connecting plate (3), and a plurality of connecting holes (4) are provided on the connecting plate (3), wherein the plurality of connecting holes (4) are arranged in a ring array.

7. A variable frequency propulsion device for ships according to claim 1, characterized in that: The first connecting column (9) and the two second connecting columns (10) are distributed in a ring array.

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