A rim propeller

Abstract

The present invention discloses a rim thruster, comprising a stator and a rotor connected to the stator through a water-lubricated bearing, wherein the stator is composed of a guide section, a stator armature, an end cover, and a sealing cylinder, and the rotor is composed of a rotor yoke, a rotor bearing section, a rotor permanent magnetic pole, a rotor sealing cylinder, and a blade, and further comprises a pressurizing system composed of an air pump group, an air tank, an accumulator, and a pressure valve connected by a pressurizing pipeline, wherein an air gap channel formed by the stator and the rotor is provided with an inflatable deformation device composed of one or more inflatable deformation bodies and an inflating interface, wherein the inflatable deformation body is arranged on the stator through a supporting and fixing device, and the pressurizing pipeline is connected to the inflating interface of the inflatable deformation body. The present invention can realize the real-time opening and closing of the stator-rotor air gap channel and the guide vane support structure bearing channel through the inflatable deformation device, and prevent the entry of foreign objects such as mud, sand, and fishing nets in the water area, and the reliability of the rim thruster can be significantly improved under the premise of ensuring the performance of the thruster.

Description

Technical Field

[0001] The invention relates to the field of electric propulsion of ships and marine engineering technology, and in particular to a rim propeller. Background Art

[0002] The rim thruster is a highly integrated ship electric propulsion device that integrates the propulsion motor and propeller and places them together in the water outside the cabin. The rim thruster propulsion motor is generally a permanent magnet motor, and the rotor is composed of permanent magnets with strong suction.

[0003] The overall structure of the rim thruster device is simple and compact, with a small size and flexible installation. In addition, the rim thruster performs well in noise reduction due to the reduction of a large number of mechanical noise sources such as speed gears and mechanical bearings. At present, the rim thruster usually includes a non-sealed air gap between the stator and the rotor of the motor to form an open water channel, or a water-lubricated bearing is arranged on the guide vane support structure, which also forms an open water channel. Both channels may exist at the same time, or only one. The channel usually allows external water to enter to ensure the lubrication of the water-lubricated bearing or to dissipate heat from the stator of the motor. These two completely open water channels bring additional risks.

[0004] When the ship is running, it cannot be guaranteed that the sea area is always clean. In some sea areas, especially near the coast or dock, the external water may contain a large amount of silt, fishing nets, long and short ropes, plastic bags and other foreign objects, metal materials and marine organisms, which can easily enter the two channels. Silt, foreign objects such as fishing nets, long and short ropes, plastic bags, etc. will cause wear of water-lubricated bearings or affect the movement of tilting pad bearings.

[0005] Once metal matter is adsorbed on the permanent magnet of the rotor, it will reduce the electromagnetic performance of the thruster motor and even cause serious vibration noise in the thruster; once marine growth attaches to the internal structure of the tilting pad or the bearing of the water-lubricated bearing, it may cause a failure to start; once too much hard marine growth attaches to the channel, friction will occur when the stator and rotor rotate, which may cause damage to the thruster. Summary of the invention

[0006] In order to solve the above problems in the prior art, the present invention proposes a rim thruster, and optimizes the gap structure between the stator and rotor.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a rim thruster, including a stator and a rotor connected to the stator through a water-lubricated bearing, the stator is composed of a guide section, a stator armature, an end cover and a sealing cylinder, the rotor is composed of a rotor yoke, a rotor bearing section, a rotor permanent magnetic pole, a rotor sealing cylinder and blades, and also includes a pressurizing system composed of an air pump group, an air tank and a pressure valve connected by a pressurized pipe, an inflatable deformation device composed of one or more inflatable deformation bodies and an inflating interface is arranged in the air gap channel formed by the stator and the rotor, the inflatable deformation body is arranged on the stator through a supporting and fixing device, and the pressurizing pipe is connected to the inflating interface of the inflatable deformation body.

[0008] The rim thruster described above is also provided with a guide vane support structure on its stator, and the two ends of the stator are respectively connected to the stator and the guide vane support structure through water-lubricated bearings, and one or more inflatable deformation devices consisting of an inflatable deformation body and an air filling interface are provided in the bearing channel formed by the guide vane support structure and the rotor. The inflatable deformation body is arranged on the guide vane support structure through a supporting and fixing device, and the pressurized pipe is connected to the air filling interface of the inflatable deformation body.

[0009] In the rim thruster, an accumulator is connected between the gas tank and the pressure valve.

[0010] The inflatable deformation body of the rim propeller is a trapezoidal, rectangular or circular structure.

[0011] The beneficial effects of the present invention are as follows: one or more inflatable deformation devices consisting of an inflatable deformation body and an air filling interface are arranged in the air gap channel formed by the stator and the rotor, the inflatable deformation device is deformed by gas / liquid pressurization or decompression, connected to the pressurization system through a pressurized pipe, and the deformation degree of the inflatable deformation body is controlled by the pressure. When the inflatable deformation device is subjected to the regulated pressure, the inflatable deformation body is radially deformed, and an adjustable contact pressure is formed on the other side of the open channel. The radial deformation of the inflatable deformation body can be inward or outward. The present invention can effectively reduce the adverse effects of foreign matter such as mud, fishing nets, metal materials, and marine organisms entering the open channel on the rim propeller when the propeller is in a harsh water environment. At the same time, the channel will not be closed all the time and other liquids do not need to be injected into the channel, thereby ensuring the heat dissipation, water bearing lubrication, environmental protection and other requirements of the rim propeller, while ensuring the working performance of the rim propeller, while improving the reliability of the rim propeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a general structural diagram of the first embodiment of the present invention;

[0013] Figure 2 It is a schematic diagram of the arrangement of the inflatable deformation device of the present invention;

[0014] Figure 3 It is a structural schematic diagram of the inflatable deformation device of the present invention;

[0015] Figure 4 It is a structural schematic diagram of the pressurizing system of the present invention;

[0016] Figure 5 FIG. 2 is a schematic structural diagram of a second embodiment of the present invention.

[0017] The figures are marked as follows: 1—stator, 2—rotor, 3—guide vane support structure, 4—water-lubricated bearing, 5—inflatable deformation device, 51—inflatable deformation body, 52—support and fixing device, 53—gas filling interface, 6—pressurization system, 61—gas filling pump group, 62—gas tank, 63—accumulator, 64—pressure valve, 65—exhaust port, 66—pressurization pipeline. DETAILED DESCRIPTION

[0018] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the various components in the accompanying drawings are drawn in specific proportions, these proportional relationships are only exemplary, and those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0019] It should be noted that, in the description of the present invention, terms such as "center", "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operate in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0020] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be a connection between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The rim propeller may have two or one of the open channels: an air gap channel is formed between the stator 1 and the rotor 2, and a bearing channel is formed between the stator 1 and the guide vane support structure 3. When the rim propeller is running, the rotor 2 drives the propeller to rotate, and a certain pressure difference will be formed before and after the propeller, causing water to flow in the two open channels, the air gap channel and the bearing channel. There is a possibility of sucking foreign matter into the channel. When the propeller is not running, foreign matter may also slowly enter the channel with the water flow.

[0022] According to actual needs, the present invention is provided with an inflation deformation device 5, which can block or open the open channel by inflation and deformation through the pressurization system 6, thereby preventing foreign matter from entering, or cleaning the internal channel.

[0023] According to an example of the present invention, as shown in FIG1 , the rim thruster disclosed in the present invention comprises a stator 1, a rotor 2, a guide vane support structure 3, a water-lubricated bearing 4 and an inflatable deformation device 5. The stator 1 is composed of a guide section, a stator armature, an end cover, and a sealing cylinder. The gap between the stator armature and the end cover can be potted or not potted. The inside of the stator armature is a sealed cavity that cannot be ingressed with water. The rotor 2 is composed of a rotor yoke, a rotor bearing section, a rotor permanent magnetic pole, a rotor sealing cylinder and a blade. The rotor permanent magnetic pole is a sealed cavity that cannot be ingressed with water.

[0024] The inflatable deformation device 5 is composed of an inflatable deformation body 51, an inflatable deformation support fixing device 52, and an air filling interface 53, and is arranged on the stator side in the air gap channel. Figure 2 and Figure 3 As shown. When not inflated, the inflatable deformer remains in the space where it is located. When inflated, the inflatable deformer 51 expands, closing or partially closing the open channel according to the air pressure. When deflated, the pressure relief valve opens, the inflatable deformer 51 returns to its initial volume, and the open channel is opened. The inflatable deformer 51 is generally arranged on the stator 1 to facilitate the arrangement of the pressurized pipe 66. In terms of arrangement position, it can be arranged axially or radially according to the specific structure of the stator 1; in terms of quantity, it can be arranged individually or in combination as needed. The inflatable deformer shown in Figure 3 has a trapezoidal appearance, and can also be arranged as a rectangle, circle or other special shape as needed.

[0025] The pressurizing system 6 is composed of a gas pump group 61, a gas tank 62, an accumulator 63, a pressure valve 64, and an exhaust port 65. The whole is connected through a pressurizing pipeline 66. Figure 4As shown. First, the air pump group 61 increases the pressure of the accumulator 63 to the set pressure, and then stops. At this time, the pressure valve 64 between the accumulator 63 and the inflatable deformable body 51 is closed. When pressure is required, the pressure valve 64 opens, and the accumulator 63 pressurizes the inflatable deformable body 51. When the pressure of the accumulator 63 is lower than the set pressure, the air pump group 61 starts to pressurize the accumulator 63. At this time, the air pump group 61 is fully connected with the accumulator 63 and the inflatable deformable body 51 until the set pressure is reached, and then the air pump group 61 stops. It is also possible not to use the accumulator 63, but in this case, the air pump group 61 needs to work all the time.

[0026] The inflatable deformable body 51 is made of a material with a self-lubricating effect (including but not limited to polytetrafluoroethylene), with low friction power consumption and strong wear resistance.

[0027] In the above implementation case, the rim thruster does not have a guide vane support structure 3, and other implementation cases can also be designed to have a guide vane support structure 3. Figure 5 , the bearing 4 can be arranged in the guide vane support structure 3 to form an open channel. The pneumatic deformation device 5 is similar to the first embodiment, except that the pneumatic deformation device 5 is additionally arranged in the open channel of the guide vane support structure 3, and the air filling pipe passes through the guide vane support structure 3 and is connected to the pneumatic deformation device 5. The open channel formed by the water-lubricated bearing 4 can be opened or closed in real time, or the gap size of the channel can be adjusted as needed. The pneumatic deformation body 51 of the pneumatic deformation device 5 is radially or axially arranged in non-moving parts such as the stator 1 or the guide vane support structure 3.

[0028] The above embodiments are only illustrative of the principles and effects of the present invention, as well as some embodiments of its application. For those skilled in the art, several modifications and improvements may be made without departing from the creative concept of the present invention, and all of these belong to the protection scope of the present invention.

Claims

1. A rim thruster, comprising a stator (1) and a rotor (2) connected to the stator (1) via a water-lubricated bearing (4), characterized in that: The stator (1) is composed of a guide section, a stator armature, an end cover and a sealing cylinder, and the rotor (2) is composed of a rotor yoke, a rotor bearing section, a rotor permanent magnetic pole, a rotor sealing cylinder and a blade, and also includes a pressurizing system (6) composed of an air pump group (61), an air tank (62) and a pressure valve (64) connected by a pressurizing pipeline (66). One or more inflatable deformation devices (5) composed of an inflatable deformation body (51) and an inflating interface (53) are arranged in the air gap channel formed by the stator (1) and the rotor (2). The inflatable deformation body (51) is arranged on the stator (1) through a supporting fixing device (52). The pressurizing pipeline (66) and the inflatable deformation device (5) are connected to the inflatable deformation device (51). The stator (1) is also provided with a guide vane support structure (3); the two ends of the stator (1) are respectively connected to the stator (1) and the guide vane support structure (3) through water-lubricated bearings (4); one or more inflatable deformation devices (5) consisting of an inflatable deformation body (51) and an inflatable interface (53) are provided in a bearing channel formed by the guide vane support structure (3) and the rotor (2); the inflatable deformation body (51) is provided on the guide vane support structure (3) through a supporting fixing device (52); and the pressurized pipeline (66) is connected to the inflatable interface (53) of the inflatable deformation body (51).

2. A rim thruster according to claim 1, characterized in that: The guide vane support structure (3) is provided with a step portion at the front end opening, and the inflation deformation device (5) is arranged on two surfaces that are perpendicular to each other.

3. A rim thruster according to claim 1 or 2, characterized in that: An accumulator (63) is connected between the gas tank (62) and the pressure valve (64).

4. A rim thruster according to claim 1 or 2, characterized in that: The inflatable deformable body (51) is a trapezoidal, rectangular or circular structure.

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