Integrated motor water noise test research device of rim propeller

Abstract

The application discloses a kind of integrated motor water noise test research devices of wheel rim propeller, including water noise separation module and loading module, water noise separation module is used to separate out the water power of wheel rim propeller propeller and its noise and keep the electromagnetic excitation force of wheel rim propeller integrated motor unchanged, by wheel rim propeller, front support, rear support, rotor disc, connecting disc and connecting shaft composition, loading module is used to load the load of wheel rim propeller actual working condition, by watertight box, magnetic powder brake, vibration isolator and elastic coupling composition;The application is by using rotor disc, connecting disc, connecting shaft, elastic coupling and magnetic powder brake composition axial power loading system, replaces propeller, excludes propeller water power noise, retains the electromagnetic excitation force of wheel rim propeller integrated motor, suitable for water noise test research of wheel rim propeller integrated motor, for the performance evaluation and check of wheel rim propeller integrated motor water noise.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ship propeller, and particularly relates to a water noise test research device for integrated motor of a rim propeller. BACKGROUND

[0002] As an integrated shaftless propelling device for ships, the rim propeller integrates the motor rotor and the propeller, cancels the transmission shaft, has a highly integrated and compact structure, and is theoretically lower in water noise level and quieter in operation than the traditional propeller. At present, the research on the low-noise rim propeller is very urgent. However, the rim propeller involves the electromagnetic excitation force of the motor and the hydrodynamic force of the propeller, and the highly coupled structure and fluid environment of the propeller in the vibration medium, so the vibration noise research of the rim propeller is difficult.

[0003] If the noise influence levels of the electromagnetic excitation force and the hydrodynamic force are separately researched and the interaction relationship is researched, effective vibration and noise reduction measures can be proposed from the mechanism aspect. Since the integrated motor rotor and the propeller of the rim propeller are highly coincident in structure, it is necessary to design a water noise test research device for the integrated motor of the rim propeller. SUMMARY

[0004] In order to solve the above problems, the application provides a water noise test research device for the integrated motor of the rim propeller, which separates the water dynamic noise of the rim propeller in structure and can be used for the water noise test research of the integrated motor of the rim propeller.

[0005] The application solves the technical problems by adopting the technical scheme of a water noise test research device for the integrated motor of the rim propeller, which comprises a water noise separation module and a loading module. The water noise separation module comprises a rim propeller fixed between a front support and a rear support, a rotor disc for replacing the propeller, and a connecting disc. The rotor disc is fixedly connected to the rotor of the rim propeller on the outside, the connecting disc is connected with a connecting shaft extending out of the front support, and the inside of the rotor disc is connected with the connecting disc. The loading module comprises a magnetic powder brake arranged in a water-tight box and a vibration isolator fixedly arranged at the bottom of the water-tight box. The magnetic powder brake is connected with the connecting shaft extending into the water-tight box through an elastic coupling. The rotor of the integrated motor of the rim propeller, the rotor disc, the connecting disc, the connecting shaft, the magnetic powder brake, and the elastic coupling form the rotor part of the loading module.

[0006] The rotor disc of the water noise test research device for the integrated motor of the rim propeller adopts a split structure, and the number of split parts is the same as the number of blades.

[0007] The front support and the rear support of the integrated motor water noise test research device of the rim propeller are connected with the flange type connection consistent with the outer contour of the rim propeller shell.

[0008] The water-tight box body of the integrated motor water noise test research device of the rim propeller is composed of an upper box cover, a front box cover and a shell, static seals are arranged at the connection positions of the shell and the upper box cover and the front box cover respectively, and dynamic seals are arranged at the connection positions of the front box cover and the connecting shaft.

[0009] The upper box cover of the integrated motor water noise test research device of the rim propeller is further provided with a lifting screw.

[0010] The rotor disc of the integrated motor water noise test research device of the rim propeller is a circular ring part, the connecting disc is a whole circular part, the corresponding positions of the rotor disc and the connecting disc are respectively provided with the first interface and the second interface matched with each other, and the rotor disc and the connecting disc are connected to form a whole circle covering the water duct of the rim propeller.

[0011] The device separates the water dynamic noise of the propeller, can independently carry out the water noise test of the integrated motor of the rim propeller, the rotor disc fully utilizes the interface of the rim propeller, and the structure is simple and convenient to disassemble and assemble; the magnetic powder brake has small vibration noise and small interference to the noise test; the elastic coupling is arranged in the water-tight box body and connected with the magnetic powder brake and the water-tight box body through the vibration isolator, so that the interference of the rotor system to the water noise test is further reduced; the validity of the test data of the device can be ensured by judging whether the vibration noise test value of the rim propeller and the vibration noise test value on the water-tight box body meet the signal-to-noise ratio condition. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the front view of the device;

[0013] Figure 2 is the structure diagram of the water-tight box body of the device;

[0014] Figure 3 is the rotor disc and its split part of the device;

[0015] Figure 4 is the connection diagram of the rotor disc and the connecting disc of the device;

[0016] Figure 5 is the structure diagram of the front support of the device.

[0017] The reference signs are: 11 - wheel rim propeller, 12 - front support, 13 - rear support, 14 - rotor disc, 15 - connecting disc, 16 - connecting shaft, 21 - watertight box, 22 - magnetic powder brake, 23 - vibration isolator, 24 - elastic coupling, 211 - upper box cover, 212 - front box cover, 213 - lifting screw, 214 - static seal, 215 - dynamic seal, 216 - shell. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. It should be noted that the terms used herein are only used to describe the specific embodiments, and not to limit the example embodiments of the present application. As used herein, the singular form also includes the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise", "include" are used in the specification, the presence of a feature, step, operation, device, component and their combinations is indicated.

[0019] Unless otherwise specifically stated, the relative arrangements of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application. The dimensions of the parts shown in the drawings are not necessarily to scale for ease of description. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized description. In the examples discussed herein, any specific numerical values should be interpreted as exemplary, and not as limiting, so that other examples of the example embodiments can have different values. Similar reference numbers and letters represent similar items in the following drawings, and once an item is defined in a drawing, it does not need to be further explained in subsequent drawings.

[0020] In order to conduct water noise test of the wheel rim propeller integrated motor alone, the propeller must be removed, but the removal of the propeller will result in no output power of the wheel rim propeller 11. The widely used torque loading device needs a shaft to drive, but the shaftless design of the wheel rim propeller 11 requires a rotor system to drive the torque loading device. Considering the convenient disassembly and assembly, the implementation scheme must introduce as little rotor stirring water noise and vibration noise of the whole rotor system as possible. Based on the above idea, the technical scheme of the embodiment is as follows.

[0021] As Figure 1As shown, the application discloses a kind of integrated motor water noise test research devices of wheel rim propeller, including water noise separation module and loading module;The water noise separation module includes wheel rim propeller 11, front support 12 and rear support 13, rotor disc 14 for replacing propeller blade and connecting disc 15, connecting shaft 16;The loading module includes water-tight box 21, magnetic powder brake 22, vibration isolator 23 and elastic coupling 24.

[0022] It needs to be explained that the rotor portion of loading module is formed by the rotor of integrated motor of wheel rim propeller 11, rotor disc 14, connecting disc 15, connecting shaft 16, magnetic powder brake 22 and elastic coupling 24, and the rotor of loading device is simulated.The selection of magnetic powder brake 22 only needs to meet the rated operating condition of wheel rim propeller in power, rotating speed and torque, and the structure is as simple as possible, and the vibration noise is small;The design of connecting shaft 16 needs to meet the rated torque, and the structure is simple and rigid enough;Elastic coupling 24 needs to meet the rated torque, and in order to ensure the assembly between water noise separation module and loading module, elastic coupling 24 can compensate for misalignment, and can also reduce the vibration noise of the whole rotor system due to misalignment.The fulcrum of the whole rotor system utilizes the water-lubricated bearing of wheel rim propeller and the self-bearing of magnetic powder brake 22, without additional introduction of fulcrum, so that the structure is simpler.

[0023] As shown in Figure 2 Water-tight box 21 is composed of upper box cover 211, front box cover 212, static seal 214, dynamic seal 215 and shell 216, and lifting screw 213 is further arranged on upper box cover 211.The opening on shell 216 is determined according to the outer contour of selected magnetic powder brake 22, to ensure that it can be smoothly installed into water-tight box 21, and the upper box cover 211 and front box cover 212 can be designed according to the hole on shell 216.The whole device needs to be immersed in water, and the interface between upper box cover 211, front box cover 212 and shell 216 needs to be designed with corresponding static seal 214, which can be designed according to the pressure of water immersion depth.The dynamic seal 215 between water-tight box 21 and connecting shaft 16 needs to be designed, which can be designed according to the linear velocity, sealing pressure difference and use temperature.The lifting screw 213 is designed according to the total weight of the whole water noise separation module.

[0024] In order to ensure that the test device can measure effective integrated motor water noise signal, the vibration noise test value of wheel rim propeller 11 and the vibration noise test value on water-tight box 21 meet the signal-to-noise ratio requirement, and the former generally needs to be greater than the latter by 6dB.

[0025] Specifically, the rotor disc 14 and the connecting disc 15 replace the propeller, the rotor disc 14 and the propeller back plate are connected to the motor rotor through the same interface, and the rotor disc 14 adopts a split structure for easy disassembly and assembly, and the number of split parts is the same as the number of blades. Figure 3 and Figure 4 Fig. 7 shows an embodiment of the rotor disc 14, and the number of split parts of the rotor disc 14 is 7. When the rotor disc 14 is actually installed on the rotor of the integrated motor, the axial installation plane is determined, and the structure is limited to be installed from the inside to the outside along the radial direction of the determined plane. In order to avoid installation interference, the rotor disc 14 is designed as a circular ring, the outer diameter of the circular ring is consistent with the inner diameter of the rotor of the integrated motor, the inner diameter of the rotor disc 14 should be as large as possible, but the interface for connecting the connecting disc 15 should be left on the circular ring. The connecting disc 15 is designed as a whole circle connected with the rotor disc 14 to form a whole circle covering the water channel of the rim propeller. The whole rotor system will not generate large water dynamic noise in the rotating process.

[0026] The rim propeller 11 is supported by the front support 12 and the rear support 13, and the magnetic powder brake 22 is installed in the water-tight box 21. By designing the support structure, the axis of the whole rotor system is concentric, and the ground clearance is as low as possible, so that the installation condition is convenient.

[0027] Figure 5 Fig. 8 shows an example of the front support 12, which adopts a flange type connection consistent with the outer contour of the rim propeller shell. The inner and outer diameters of the flange are consistent with the inner and outer diameters of the rim propeller shell, and the support can be connected through screws. The rigidity design of the support should be sufficient, and the rib plate can be designed if necessary. The main features of the rear support 13 are similar to those of the front support 12.

[0028] In the operation process of the integrated motor water noise test device of the rim propeller, in order to exclude the vibration noise interference of the device as much as possible and obtain the water noise of the integrated motor of the rim propeller more truly, some vibration and noise reduction measures need to be taken. The vibration damper 23 is used to connect the magnetic powder brake 22 and the water-tight box 21, so as to reduce the vibration noise radiated outward by the magnetic powder brake 22. The water noise separation module and the loading module are connected through the elastic coupling 24, so as to reduce the vibration noise of the rotor system. The elastic coupling 24 is built in the water-tight box 21, so as to reduce the water stirring and the additional bending moment of the rotor system as much as possible.

[0029] The structure of the present application is simple. The rotor disc 14 and the connecting disc 15 separate the water dynamic force and noise of the propeller of the rim propeller 11, and the magnetic powder brake 22 is used for power loading, so that the integrated motor water noise test of the rim propeller 11 can be effectively carried out, and support is provided for mechanism research.

[0030] The above examples are only embodiments of the present application, which are described in more detail and in more detail, but cannot be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. An integrated motor water noise test research device of a wheel rim propeller, characterized in that: The utility model relates to a water noise separation module and loading module, the water noise separation module includes the rim propeller (11) fixed between the front support (12) and rear support (13), the rotor disc (14) for replacing propeller and connecting disc (15), the rotor disc (14) outside fixed connection is connected to the integrated motor rotor of rim propeller (11), the connecting shaft (16) is connected to the axle center of connecting disc (15), and the inside of rotor disc (14) is connected with connecting disc (15), the loading module includes the magnetic powder brake (22) and vibration isolator (23) set up in watertight box body (21) inside, and the magnetic powder brake (22) is connected with the connecting shaft (16) of the watertight box body (21) of reaching through the elastic coupling (24), and the integrated motor rotor of rim propeller (11), rotor disc (14), connecting disc (15), connecting shaft (16), magnetic powder brake (22) and elastic coupling (24) have formed the rotor part of loading module.

2. The integrated motor water noise test research device for a wheel rim propeller according to claim 1, characterized in that, The rotor disc (14) adopts split structure, and the split number is same with the number of blades.

3. The integrated motor water noise test research device for a wheel flange propeller according to claim 1, characterized in that, The front support (12) and rear support (13) adopt flange connection consistent with the shell contour of rim propeller (11).

4. The integrated motor water noise test research device for a wheel rim propeller according to claim 1, characterized in that, The watertight box body (21) is composed of upper box cover (211), front box cover (212) and shell (216), the connecting place of shell (216) and upper box cover (211) and front box cover (212) is provided with static seal (214) respectively, and the connecting place of front box cover (212) and connecting shaft (16) is provided with dynamic seal (215).

5. The integrated motor water noise test rig for wheel rim propulsors according to claim 4, characterized in that, The upper box cover (211) is further provided with lifting screw (213).

6. The integrated motor water noise test research device for a wheel rim propeller according to claim 1, characterized in that, The rotor disc (14) is a circular ring, the connecting disc (15) is a whole circle, and the rotor disc (14) and connecting disc (15) are connected to form a whole circle covering the water channel of rim propeller (11).

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