Support structure for a rim thruster

Abstract

The present application relates to a kind of support structures for rim propeller, flange plate is used as the force element of support structure for rim propeller, the outer side ring of flange plate and flange hole are directly connected with the motor shell of rim propeller, for transmitting the thrust load on the support structure for rim propeller to motor shell;Radial bearing sliding assembly and top wheel sliding assembly are connected on the flange plate by multiple sets of limiting blocks, thrust pad is installed on the inner side ring of flange plate, to provide axial support for rim propeller.The present application can provide radial, axial and starting auxiliary support for rim propeller, overall installation is convenient, can effectively avoid the problem of difficult starting of rim propeller;According to the wear condition of tile, the clearance between friction pair can be compensated in real time, so that the lubrication clearance is kept in a reasonable range, to ensure the stability of lubrication performance, without entering the dock to disassemble whole machine for replacement, in addition, the compensation method can maximize the use of tile, without causing material waste, reduce maintenance and use cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of ship power system's wheel rim propeller, in particular to a kind of support structure for wheel rim propeller. BACKGROUND

[0002] As a new type of propeller, wheel rim propeller is favored by shipowners and research institutions due to its high efficiency and low noise. The propeller of the propeller is directly driven by the motor, and the motor rotor drives the propeller to rotate. The thrust generated by the propeller is generally directly borne by the water-lubricated bearing and transmitted to the motor housing, and then to the ship body, forming the ship power. In addition to the propeller thrust, the water-lubricated bearing also needs to bear the weight of the rotating parts such as the propeller and the radial fluctuating load during the operation of the whole machine.

[0003] As a key support structure of the wheel rim propeller, the water-lubricated bearing is in direct contact with the rotating parts such as the propeller and forms the corresponding friction pair. The thrust pad and radial pad on the bearing will gradually thin out as the service time of the wheel rim propeller increases, thus causing the contact clearance to increase, which not only reduces the lubrication performance, but also causes additional vibration and impact due to the large contact clearance. Therefore, the tiles need to be replaced regularly to ensure optimal lubrication effect and running stability. Currently, water-lubricated bearings at home and abroad generally use interference, welding or bolt connection to combine copper alloy materials with composite materials to ensure the lubrication performance and structural stiffness of the bearing. However, this structure generally has the following problems:

[0004] 1. Once the wear of the existing water-lubricated bearing is large, it needs to be replaced in time. After docking, the wheel rim propeller needs to be disassembled and the water-lubricated bearing needs to be replaced. The overall maintenance cost is high and the maintenance cycle is long.

[0005] 2. The rotating parts such as the propeller of the wheel rim propeller in the static state are directly pressed on the water-lubricated bearing under the action of gravity. Due to the large contact area and the inability to form an effective lubricating water film in time, the running resistance is large. When the propeller starts, the current will increase sharply, which may cause the propeller to fail to start and run normally, or may cause the equipment to overload and other faults.

[0006] 3. Due to the complex and variable sailing conditions, the wheel rim propeller is easily subjected to external impact, which will eventually be "absorbed" by the water-lubricated bearing. Although the contact pad part of the water-lubricated bearing generally uses composite material, the damping effect is generally poor, and frequent vibration impact may cause damage to the key components of the propeller, resulting in frequent maintenance and short service life.

[0007] The application discloses a supporting structure for a rim propeller, which can effectively solve the above-mentioned problems faced by the existing rim propeller, can monitor the friction pair contact state at all times, can automatically compensate the radial clearance after bearing wear, can realize the maximum utilization of the contact pad while guaranteeing the lubrication performance, can reduce the maintenance and replacement cost, and can improve the operation reliability of the whole machine.

[0008] In addition, the supporting structure can also play a damping and buffering role, can effectively absorb the vibration impact in the operation process of the rim propeller, can avoid damaging the internal structure of the propeller, and can relieve the problem of sudden increase of starting current caused by excessive friction resistance at the starting moment of the propeller. SUMMARY

[0009] The application aims to provide a supporting structure for a rim propeller, which can overcome the shortcomings of the existing supporting structure for a rim propeller in use, and improve the stability, reliability and intelligence of the supporting structure for a rim propeller.

[0010] To achieve the above-mentioned purpose, the technical scheme of the application is as follows: a supporting structure for a rim propeller, which comprises a flange plate, a radial bearing sliding assembly, a top wheel sliding assembly and a thrust pad, the flange plate is a force receiving member of the supporting structure for a rim propeller, the outer ring and the flange hole of the flange plate are directly connected with a motor shell of the rim propeller, and are used to transmit the thrust load on the supporting structure for a rim propeller to the motor shell and then to the ship body; the radial bearing sliding assembly and the top wheel sliding assembly are connected to the flange plate through a plurality of limiting blocks, and the thrust pad is installed on the inner ring of the flange plate to provide axial support for the rim propeller.

[0011] Further, the radial bearing sliding assembly is composed of a radial pad, a radial pad support, an underwater hydraulic cylinder and a mounting bracket, the radial pad is fixedly installed on the radial pad support, the radial pad support is connected with the hydraulic rod of the underwater hydraulic cylinder through a screw rod, a pressure sensor is arranged between the radial pad support and the underwater hydraulic cylinder, a displacement sensor is arranged on the underwater hydraulic cylinder, and the cylinder body of the underwater hydraulic cylinder is fixed on the flange plate through the mounting bracket to form the radial bearing sliding assembly.

[0012] Further, the radial bearing sliding assembly is composed of a radial pad, a radial pad support, an underwater hydraulic cylinder and a mounting bracket, the radial pad is fixedly installed on the radial pad support, the radial pad support is connected with the hydraulic rod of the underwater hydraulic cylinder through a screw rod, a pressure sensor is arranged between the radial pad support and the underwater hydraulic cylinder, a displacement sensor is arranged on the underwater hydraulic cylinder, and the cylinder body of the underwater hydraulic cylinder is fixed on the flange plate through the mounting bracket to form the radial bearing sliding assembly.

[0013] Further, when the radial pad and the propeller rotating assembly form a friction pair contact, the displacement sensor and the pressure sensor monitor the radial pad and the radial pad support movement and the pressure in real time; when the radial pad contact surface wears greatly, the underwater hydraulic cylinder drives the radial pad to supply radially, combined with the real-time monitoring value of the displacement sensor and the pressure sensor, the contact gap is maintained at a stable value, ensuring the stability of the lubrication performance, without entering the dock for maintenance and replacement; if emergency braking is needed during navigation, the radial pad is radially folded by the underwater hydraulic cylinder to stop the propeller; when the wheel rim propeller itself is suddenly subjected to vibration impact during navigation, the underwater hydraulic cylinder absorbs the impact energy, achieving the effect of vibration reduction and noise reduction, improving the reliability and navigation comfort of the wheel rim propeller.

[0014] Further, the top wheel sliding assembly is composed of a top wheel, a top wheel mounting bracket, a top wheel fixing bracket, and a top wheel underwater hydraulic cylinder. The top wheel is installed on the top wheel fixing bracket through the center hole, and the top wheel has a rotational degree of freedom. The end of the top wheel fixing bracket is connected with the hydraulic rod screw of the top wheel underwater hydraulic cylinder. A pressure sensor is arranged between the top wheel fixing bracket and the top wheel underwater hydraulic cylinder. A displacement sensor is arranged on the top wheel underwater hydraulic cylinder. The cylinder body of the top wheel underwater hydraulic cylinder is fixed to the limiting block through the top wheel mounting bracket to form the top wheel sliding assembly.

[0015] Further, the top wheel sliding assembly has five groups, which are evenly arranged between the limiting blocks of the flange plate, allowing radial displacement, and providing radial auxiliary ejection support for the propeller rotating assembly.

[0016] Further, under the drive of the top wheel underwater hydraulic cylinder, the top wheel can move radially. When the top wheel contacts the propeller rotating assembly, the pressure sensor and the displacement sensor monitor the movement and the pressure of the top wheel in real time. Before the wheel rim propeller starts, the top wheel sliding assembly is started, the top wheel underwater hydraulic cylinder pushes the top wheel to lift the propeller rotating assembly, so that it is separated from the radial pad, the sliding friction is changed to rolling friction, the starting friction resistance is reduced, the starting current is prevented from being too large, and after the propeller speed rises, the top wheel can be folded, the radial support is provided by the radial pad, and the lubricating water film is established.

[0017] Further, the flange plate includes an inner ring, an outer ring, and limiting blocks. The inner ring, the outer ring, and the limiting blocks are connected by welding, casting, or bolts. The limiting blocks are symmetrically arranged and designed in five places. Limiting steps are arranged at both ends of the limiting blocks to allow the sliding assembly to slide in the radial direction, but prevent the sliding assembly from sliding outward.

[0018] Further, the thrust pad is directly installed on the inner ring, and a pressure sensor is arranged between the thrust pad and the inner ring. The number of thrust pads is an integer multiple of the number of radial pads.

[0019] Further, the support structure for the rim propeller is symmetrically arranged, and two sets of support structures for the rim propeller are arranged for one rim propeller, wherein the thrust pad, the radial pad and the top wheel are all made of water-lubricated composite material, and the mounting mode of the radial pad and the thrust pad to the base is a conventional tile mounting mode.

[0020] The beneficial effects of the present application mainly include:

[0021] 1. The support structure can provide radial, axial and starting auxiliary support for the rim propeller, is convenient to install as a whole, and can effectively avoid the problem of difficult starting of the rim propeller.

[0022] 2. The support structure can compensate the friction pair gap in real time according to the tile wear condition, so that the lubrication gap is kept within a reasonable range, the lubrication performance stability is ensured, the whole machine does not need to be disassembled for replacement, the compensation method can maximize the use of tiles, and material waste is avoided, and the maintenance and use cost is reduced.

[0023] 3. The support structure can timely absorb and relieve the vibration impact of the rim propeller during operation by arranging the underwater hydraulic cylinder and the sensor, simultaneously monitors the internal stress and displacement state of the propeller in real time, is convenient to debug, can also assist in propeller emergency stop, makes the operation more intelligent and transparent, and improves the comfort, safety and reliability.

[0024] In summary, the invention of the above support structure for the rim propeller can effectively promote the universal and high-standard application of the rim propeller. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a schematic view of the support structure for the rim propeller;

[0026] Fig. 2 is a schematic view of the flange plate (partially broken);

[0027] Fig. 3 is a schematic view of the radial bearing sliding assembly;

[0028] Fig. 4 is a schematic view of the top wheel sliding assembly;

[0029] In the figure, 1. radial bearing sliding assembly, 2. flange plate, 3. top wheel sliding assembly, 4. thrust pad, 1-1. radial pad, 1-2. radial pad support, 1-3. pressure sensor A, 1-4. displacement sensor A, 1-5. underwater hydraulic cylinder, 1-6. mounting bracket, 2-1. inner ring, 2-2. outer ring, 2-3. limit block, 3-1. top wheel mounting bracket, 3-2. top wheel underwater hydraulic cylinder, 3-3. pressure sensor B, 3-4. top wheel, 3-5. top wheel fixing bracket, 3-6. displacement sensor B, 4-1. pressure sensor C. DETAILED DESCRIPTION

[0030] The application will be further described below in conjunction with the drawings and examples.

[0031] As Figs. 1 to 4 shown, the support structure for the rim propeller provided by the embodiment of the application includes a radial bearing sliding assembly 1, a flange plate 2, a top wheel sliding assembly 3, and a thrust pad 4. The flange plate 2, as the main force receiving part of the support structure for the rim propeller, is composed of an inner ring 2-1, an outer ring 2-2, and five limit blocks 2-3. The outer ring 2-1 is provided with a flange hole and can be directly connected with the motor shell of the rim propeller, responsible for transmitting the thrust and other loads on the support structure for the rim propeller to the motor shell, and then to the ship body itself. The five limit blocks 2-3 facilitate the arrangement of the radial bearing sliding assembly 1 and the top wheel sliding assembly 3, and the inner ring 2-2 is the installation base of the thrust pad 4, providing axial support for the rim propeller.

[0032] The radial bearing sliding assembly 1 is composed of a radial tile 1-1, a radial tile support 1-2, an underwater hydraulic cylinder 1-5, and a mounting bracket 1-6. The radial tile 1-1 can be installed on the radial tile support 1-2 by interference, welding or bolt connection, etc. The radial tile support 1-2 is connected with the hydraulic rod of the underwater hydraulic cylinder 1-5 by a screw rod, and a pressure sensor 1-3 is arranged between the two. In addition, a displacement sensor 1-4 is arranged on the underwater hydraulic cylinder 1-5. The cylinder body of the underwater hydraulic cylinder 1-5 is fixed on the flange plate 2 through the mounting bracket 1-6. The above constitutes the radial bearing sliding assembly 1. The assembly is composed of a total of 5 parts, which are evenly arranged between the limiting blocks 2-3 of the flange plate 2 and can allow radial displacement to provide radial support for the propeller rotating assembly. Under the drive of the underwater hydraulic cylinder 1-5, the radial tile 1-1 and the radial tile support 1-2 can move radially, and the underwater hydraulic cylinder 1-5 itself is provided with a pressure sensor 1-3 and a displacement sensor 1-4. When the radial tile 1-1 contacts the propeller rotating assembly to form a friction pair, the displacement and pressure of the radial tile 1-1 and the radial tile support 1-2 can be monitored in real time. When the contact surface of the radial tile 1-1 is worn seriously, the underwater hydraulic cylinder 1-5 can be driven to push the radial tile 1-1 radially to supply. Combined with the real-time monitoring value of the displacement sensor 1-4 and the pressure sensor 1-3, the contact clearance can be maintained at a stable value to ensure the stability of the lubrication performance and avoid in-port maintenance and replacement. If emergency braking is needed during navigation, the radial tile 1-1 can be controlled by the underwater hydraulic cylinder 1-5 to radially retract and stop the propeller. In addition, the underwater hydraulic cylinder 1-5 can also absorb the impact energy when the rim propeller itself is suddenly subjected to vibration and impact during navigation, thereby achieving the effects of vibration reduction and noise reduction and improving the reliability and navigation comfort of the rim propeller.

[0033] The top wheel sliding assembly 3 is composed of a top wheel 3-4, a top wheel mounting bracket 3-1, a top wheel fixing bracket 3-5, and a top wheel underwater hydraulic cylinder 3-2. It is a supporting auxiliary device and is composed of a total of five groups. Similar to the radial bearing sliding assembly 1, the top wheel is arranged in the limiting block 2-3 of the flange plate 2 and can move radially under the drive of the underwater hydraulic cylinder. The underwater hydraulic cylinder itself is provided with a pressure sensor and a displacement sensor. When the top wheel 3-4 contacts the propeller rotating assembly, the displacement and pressure of the top wheel can be monitored in real time. Before the rim propeller is started, the top wheel sliding assembly can be started, the top wheel underwater hydraulic cylinder 3-2 pushes the top wheel 3-4 out to lift the propeller rotating assembly, so that it is separated from the radial tile 1-1, the sliding friction is changed into rolling friction, the starting friction resistance is reduced, the starting current is avoided to be too large, and after the propeller rotating speed rises, the top wheel 3-4 can be retracted, and the radial tile 1-1 provides radial support for it to establish a lubricating water film.

[0034] The top wheel 3-4 is installed on the top wheel fixing support 3-5 through the center hole, the top wheel 3-4 has a rotating degree of freedom, the end of the top wheel fixing support 3-5 is connected with the hydraulic rod screw of the top wheel underwater hydraulic cylinder 3-2, and a pressure sensor B3-3 is arranged between the two, in addition, a displacement sensor B3-6 is arranged on the top wheel underwater hydraulic cylinder 3-2, and the cylinder body of the top wheel underwater hydraulic cylinder 3-2 is fixed to the limiting block 2-3 through the top wheel mounting support 3-1, and the above constitutes a top wheel sliding assembly 3, which is arranged between the limiting blocks 2-3 of the flange plate 2, can allow radial displacement, and provides radial auxiliary ejection support for the propeller rotating assembly.

[0035] The thrust pad 4 is directly installed on the inner side ring 2-1, and a pressure sensor C4-1 is arranged between the two, the number of thrust pads is an integer multiple of the number of radial pads, and 10 thrust pads are arranged here, and the thrust pad 4 provides bearing support for the propeller rotating assembly.

[0036] The flange plate 2 includes the inner side ring 2-1, the outer side ring 2-2 and the limiting block 2-3, which are connected by welding, casting or bolt connection, the limiting blocks 2-3 are symmetrically arranged, and a total of five limiting blocks 2-3 are designed, and limiting steps are designed at both ends of the limiting block 2-3, which can allow the radial sliding of the sliding assembly, but can prevent the sliding assembly from sliding outwards.

[0037] The support structure of the rim propeller needs to be symmetrically arranged on both sides of the rim propeller, and can provide axial and radial support for both sides of the propeller rotating assembly, limit the axial and radial displacement, and establish a good friction pair in the propeller, so as to stabilize the rotation to generate thrust. Before the motor starts, the propeller rotating assembly has not rotated yet, and is pressed on the radial pad 1-1 by gravity, at this time, the underwater hydraulic cylinder 1-5 is started first, and the radial pad is pushed to the initial position, and the propeller rotating assembly moves together, at this time, the underwater hydraulic cylinder 3-2 is started, the propeller rotating assembly is lifted by the top wheel 3-4, and then the motor drives the propeller rotating assembly to rotate, the propeller rotating assembly and the top wheel establish rolling friction, and after the propeller rotating assembly rotates, the hydraulic rod of the underwater hydraulic cylinder 3-2 is retracted, and the top wheel 3-4 is retracted, and the radial bearing sliding assembly 1 provides radial support.

[0038] Note: In this embodiment, only 5, 10 and the like are used as an introduction, but the number should not be regarded as a limitation of the present application.

Claims

1. A support structure for a rim thruster, characterized by: The flange plate is used as a supporting structure stress component of the rim propeller, and the outer ring and the flange hole of the flange plate are directly connected with the motor shell of the rim propeller, for transmitting the thrust load on the supporting structure of the rim propeller to the motor shell and then to the ship body.

2. The support structure for a wheel flange propulsor according to claim 1, characterized in that: The radial bearing sliding assembly is composed of a radial pad, a radial pad support, an underwater hydraulic cylinder and a mounting bracket, the radial pad is fixedly installed on the radial pad support, the radial pad support is connected with the hydraulic rod of the underwater hydraulic cylinder, a pressure sensor is arranged between the radial pad support and the underwater hydraulic cylinder, and a displacement sensor is arranged on the underwater hydraulic cylinder.

3. The support structure for a wheel flange propulsor according to claim 2, characterized in that: The radial bearing sliding assembly is composed of a radial pad, a radial pad support, an underwater hydraulic cylinder and a mounting bracket, the radial pad is fixedly installed on the radial pad support, the radial pad support is connected with the hydraulic rod of the underwater hydraulic cylinder, a pressure sensor is arranged between the radial pad support and the underwater hydraulic cylinder, and a displacement sensor is arranged on the underwater hydraulic cylinder.

4. The support structure for a wheel flange propulsor according to claim 3, characterized in that: The radial bearing sliding assembly is composed of a radial pad, a radial pad support, an underwater hydraulic cylinder and a mounting bracket, the radial pad is fixedly installed on the radial pad support, the radial pad support is connected with the hydraulic rod of the underwater hydraulic cylinder, a pressure sensor is arranged between the radial pad support and the underwater hydraulic cylinder, and a displacement sensor is arranged on the underwater hydraulic cylinder.

5. The support structure for a wheel flange propulsor according to claim 2, characterized in that: When the radial pad and the propeller rotating assembly form a friction pair contact, the displacement sensor and the pressure sensor monitor the displacement and the pressure of the radial pad and the radial pad support in real time; when the contact surface of the radial pad is worn out, the underwater hydraulic cylinder is driven to push the radial pad to make radial compensation, and the displacement sensor and the pressure sensor monitor the real-time monitoring value to maintain the contact gap to be a stable value, so that the lubrication performance stability is ensured, and the propeller does not need to be repaired and replaced in the dock; if emergency braking is needed during navigation, the radial pad is controlled by the underwater hydraulic cylinder to be radially retracted to stop the propeller; when the rim propeller is suddenly subjected to vibration and impact during navigation, the underwater hydraulic cylinder absorbs the impact energy to realize the functions of vibration reduction and noise reduction, and the reliability and navigation comfort of the rim propeller are improved.

6. The support structure for a wheel flange propulsor according to claim 5, characterized in that: The radial bearing sliding assembly is composed of a radial pad, a radial pad support, an underwater hydraulic cylinder and a mounting bracket, the radial pad is fixedly installed on the radial pad support, the radial pad support is connected with the hydraulic rod of the underwater hydraulic cylinder, a pressure sensor is arranged between the radial pad support and the underwater hydraulic cylinder, and a displacement sensor is arranged on the underwater hydraulic cylinder. The radial bearing sliding assembly is composed of a radial pad, a radial pad support, an underwater hydraulic cylinder and a mounting bracket, the radial pad is fixedly installed on the radial pad support, the radial pad support is connected with the hydraulic rod of the underwater hydraulic cylinder, a pressure sensor is arranged between the radial pad support and the underwater hydraulic cylinder, and a displacement sensor is arranged on the underwater hydraulic cylinder. The radial bearing sliding assembly is composed of a radial pad, a radial pad support, an underwater hydraulic cylinder and a mounting bracket, the radial pad is fixedly installed on the radial pad support, the radial pad support is connected with the hydraulic rod of the underwater hydraulic cylinder, a pressure sensor is arranged between the radial pad support and the underwater hydraulic cylinder, and a displacement sensor is arranged on the underwater hydraulic cylinder. The radial bearing sliding assembly is composed of a radial pad, a radial pad support, an underwater hydraulic cylinder and a mounting bracket, the radial pad is fixedly installed on the radial pad support, the radial pad support is connected with the hydraulic rod of the underwater hydraulic cylinder, a pressure sensor is arranged between the radial pad support and the underwater hydraulic cylinder, and a displacement sensor is arranged on the underwater hydraulic cylinder.

7. The support structure for a wheel flange propulsor of claim 2, wherein: The flange plate comprises an inner circular ring, an outer circular ring and a limiting block, the inner circular ring, the outer circular ring and the limiting block are connected through welding, casting or bolt connection, the limiting blocks are symmetrically arranged, and five limiting blocks are designed in total, limiting steps are arranged at both ends of the limiting blocks, the radial bearing sliding assembly is allowed to slide in the radial direction, but the radial bearing sliding assembly is prevented from sliding outward.

8. The support structure for a wheel flange propulsor according to claim 7, characterized in that: The thrust pad is directly installed on the inner circular ring, a pressure sensor is arranged between the thrust pad and the inner circular ring, and the number of the thrust pad is an integer multiple of the number of the radial pad.

9. The support structure for a rim propeller according to any one of claims 2-8, characterized in that: The support structure for the rim propeller is symmetrically arranged, two sets of support structures for the rim propeller are arranged for one rim propeller, the thrust pad, the radial pad and the top wheel are all made of water-lubricated composite material, and the installation mode of the radial pad and the thrust pad and the base is a conventional tile installation mode.

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