Testing method for mooring test of journal sticking type generator for ship

Abstract

The invention relates to the technical field of ship testing, in particular to a ship journal sticking type generator mooring test testing method which comprises the following steps: S1, determining the working rotating speed range of a journal sticking type generator arranged on a driving shaft of a main engine in a hooping mode; s2, carrying out a mooring test on the main engine and the propulsion system so as to ensure that the main engine can work normally; s3, disconnecting a shafting assembly connected with a propeller from a driving shaft of the main engine; s4, setting an output rotating speed range of the host; and S5, the main engine is started, the output rotating speed of the main engine is located in the output rotating speed range, the output rotating speed of the main engine is located in the working rotating speed range of the journal sticking type generator, and a journal sticking type generator test is carried out. When the ship is moored at a wharf, the journal sticking type generator can be tested, so that the cost input is reduced, and the construction period is prevented from being delayed.

Description

Technical Field

[0001] The present invention relates to the technical field of ship testing, and particularly to a mooring test method for a shaft-mounted generator for ships. Background Art

[0002] Ships play a very important role in transportation. Among them, generators are usually arranged on ships to generate electricity to supply the electricity demand of the whole ship. Among them, the fuel consumption of the ship's main engine is low. During the operation of the ship's main engine, a part of the power is output to the propulsion propeller to push the hull to sail, and another part of the power is output to the generator, so as to not only meet the demand for propulsion power, but also meet the demand for ship power generation, and can make full use of the output power of the main engine.

[0003] Shaft-mounted generators are usually used on ships. Shaft-mounted generators have the following characteristics: 1. Compact structure and space saving. The generator rotor is directly installed on the drive shaft without additional couplings or transmission devices. The overall structure is compact, suitable for occasions with limited space, and reduces the occupation of the hull space. 2. High-efficiency energy conversion. Due to direct coaxial operation, mechanical transmission losses are reduced, and the energy conversion efficiency is relatively high. 3. High reliability and durability. The shaft-mounted generator has a simple design and low failure rate, suitable for long-term continuous operation, especially performing well in harsh environments such as ships and locomotives. 4. Strong adaptability. The shaft-mounted generator can be customized according to different application scenarios, such as anti-corrosion, shock-proof, high-temperature resistance and other characteristics, to meet diverse needs. 5. Easy maintenance. The shaft-mounted generator has a simple structure, is easy to disassemble and maintain, and reduces the operation cost.

[0004] After the ship is built, the shaft-mounted generator needs to be tested. The test of the shaft-mounted generator requires the ship's main engine to reach a corresponding speed before the test can be carried out. However, when the ship is moored at the dock, while the ship's main engine drives the drive shaft to rotate, when the shaft-mounted motor installed on the drive shaft works, the drive shaft will synchronously drive the propeller to rotate through the shafting. If the speed of the ship's main engine reaches the test requirement, the ship cannot be moored. And if the test of the shaft-mounted generator is carried out in the sea, on the one hand, the test of the shaft-mounted generator cannot be carried out in advance, resulting in a possible delay in the construction period; on the other hand, the cost of the sea test is relatively high.

[0005] Therefore, a mooring test method for a shaft-mounted generator for ships is needed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a mooring test method for a shaft-mounted generator for ships, so that the shaft-mounted generator can be tested when the ship is moored at the dock, thereby reducing the cost investment and avoiding the delay of the construction period.

[0007] To achieve this goal, the present invention adopts the following technical solutions:

[0008] A mooring test method for a shaft-mounted generator for ships, comprising the following steps:

[0009] S1. Determine the operating speed range of the shaft-mounted generator mounted on the drive shaft of the main engine;

[0010] S2. Conduct a mooring test on the main engine and the propulsion system to ensure that the main engine can operate normally;

[0011] S3. Disconnect the shafting assembly connected to the propeller from the drive shaft of the main engine;

[0012] S4. Set the output speed range of the main engine;

[0013] S5. Start the main engine, the output speed of the main engine is within the output speed range, and the output speed of the main engine is within the operating speed range of the shaft-mounted generator, and conduct a shaft-mounted generator test.

[0014] In some embodiments, in step S1, the shaft-mounted generator is tested on a test bench to obtain the speed range of the shaft-mounted generator.

[0015] In some embodiments, in step S1, the minimum operating speed of the shaft-mounted generator is not less than half of the maximum operating speed of the shaft-mounted generator.

[0016] In some embodiments, the shafting assembly is connected to the drive shaft of the main engine through a coupling. In step S3, the drive shaft of the main engine is separated from the shafting assembly by disconnecting the coupling from the drive shaft of the main engine.

[0017] In some embodiments, the coupling is a hydraulic coupling.

[0018] In some embodiments, in step S4, the output speed range of the main engine is set by a main engine governor.

[0019] In some embodiments, the drive shaft of the main engine passes through a support bearing seat, and the shaft-mounted generator is located between the main engine and the support bearing seat.

[0020] In some embodiments, in step S3, after the shafting assembly is disconnected from the drive shaft of the main engine, the shafting assembly is locked.

[0021] In some embodiments, a shaft locking device is arranged on the ship, and the shafting assembly is locked by using the shaft locking device.

[0022] In some embodiments, in step S5, the host runs at a first output speed for a set duration; then the output speed of the host is increased to a second output speed to conduct a test on the bearing-mounted generator.

[0023] Advantages of the present invention:

[0024] A mooring test method for a bearing-mounted generator for a ship provided by the present invention includes the following steps: determining the operating speed range of the bearing-mounted generator mounted on the drive shaft of the host; conducting a mooring test on the host and the propulsion system to ensure the normal operation of the host; disconnecting the shafting assembly connected to the propeller from the drive shaft of the host; setting the output speed range of the host; starting the host, with the output speed of the host within the output speed range and the output speed of the host within the operating speed range of the bearing-mounted generator, and conducting a test on the bearing-mounted generator. In the above manner, after disconnecting the drive shaft from the shafting assembly, the host is driven to rotate the drive shaft to output speed. Since the drive shaft only drives the bearing-mounted generator to rotate during this process, while the ship is in a moored state, a test can be conducted on the bearing-mounted motor. Since the test can be conducted without sailing in the sea, the cost investment is reduced and the construction period delay is avoided. Description of the drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present invention and these drawings.

[0026] Figure 1 is a flowchart of a mooring test method for a bearing-mounted generator for a ship according to the present invention;

[0027] Figure 2 is a schematic diagram of disconnecting the drive shaft of the host from the shafting assembly in a mooring test method for a bearing-mounted generator for a ship according to the present invention.

[0028] In the figure:

[0029] 1. Host; 11. Drive shaft; 12. Support bearing seat; 2. Bearing-mounted generator; 3. Shafting assembly; 31. Propeller; 4. Coupling; 5. Shaft locking device. Detailed implementation manners

[0030] Before explaining any embodiment of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.

[0031] In this application, the terms "comprise", "include", "have" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0032] In this application, the terms "connect", "combine", "couple", "mount" can be direct connection, combination, coupling or mounting, or can be indirect connection, combination, coupling or mounting. Among them, by way of example, direct connection means that two parts or components are connected together without the need for an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0033] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0034] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that orientation terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive orientation, but can also be understood as the side orientation. For example, below can include directly below, lower left, lower right, lower front, and lower rear, etc.

[0035] During the shipbuilding process, in order to be able to conduct the test of the shaft-mounted generator when the ship is in the moored state, thereby reducing the cost investment and avoiding the delay of the construction period, as Figure 1 - Figure 2 shown, the present invention provides a method for mooring test of a shaft-mounted generator for ships. The method for mooring test of a shaft-mounted generator for ships includes the following steps:

[0036] S1. Determine the operating speed range of the shaft-mounted generator 2 held on the drive shaft 11 of the main engine 1;

[0037] S2. Conduct a mooring test on the main engine 1 and the propulsion system to ensure that the main engine 1 can operate normally;

[0038] S3. Disconnect the shafting assembly 3 connected to the propeller 31 from the drive shaft 11 of the main engine 1;

[0039] S4. Set the output speed range of the main engine 1;

[0040] S5. Start the main engine 1. The output speed of the main engine 1 is within the output speed range, and the output speed of the main engine 1 is within the operating speed range of the shaft-mounted generator 2, and conduct a test on the shaft-mounted generator 2.

[0041] In the above manner, after the drive shaft 11 is disconnected from the shafting assembly 3, the main engine 1 is driven to drive the drive shaft 11 to rotate and output speed. Since the drive shaft 11 only drives the shaft-mounted generator 2 to rotate during this process, while the ship is in a moored state, the shaft-mounted motor can be tested. Since the test can be carried out without sailing in the sea, the cost investment is reduced and the construction period delay is avoided.

[0042] In some embodiments, in step S1, the shaft-mounted generator 2 is tested on the test bench to obtain the speed range of the shaft-mounted generator 2. In the above manner, the speed range of the shaft-mounted generator 2 can be accurately obtained, so as to ensure that the output speed of the main engine 1 can be accurately controlled subsequently, so that the shaft-mounted generator 2 is in a normal operating state, and thus the shaft-mounted generator 2 can be effectively tested.

[0043] In some embodiments, in step S1, the minimum operating speed of the shaft-mounted generator 2 is not less than half of the maximum operating speed of the shaft-mounted generator 2. If the minimum operating speed of the shaft-mounted generator 2 is less than half of the maximum operating speed of the shaft-mounted generator 2, the shaft-mounted generator 2 cannot stably output electric energy. Therefore, by limiting the minimum operating speed of the shaft-mounted generator 2, the shaft-mounted generator 2 can be ensured to be in a stable operating state.

[0044] In some embodiments, the shafting assembly 3 and the drive shaft 11 of the main engine 1 are connected by a coupling 4. In step S3, the drive shaft 11 of the main engine 1 is separated from the shafting assembly 3 by disconnecting the coupling 4 from the drive shaft 11 of the main engine 1. Since the coupling 4 is used to connect with the drive shaft 11, it is convenient for the shafting assembly 3 to be docked with the drive shaft 11. By separating the coupling 4 from the drive shaft 11, the power transmission between the coupling 4 and the drive shaft 11 can be interrupted.

[0045] In some embodiments, the coupling 4 is a hydraulic coupling. By using a hydraulic coupling, the stability of the connection between the shafting assembly 3 and the drive shaft 11 can be ensured. The hydraulic coupling utilizes the pressure of hydraulic oil to push an internal piston or sleeve, causing the internal parts of the coupling 4 (such as a tapered sleeve or expansion sleeve) to expand or contract, thereby achieving the connection or disconnection between the drive shaft 11 and the shafting assembly 3. When the hydraulic oil is injected, the parts expand to achieve the connection; when the hydraulic oil is discharged, the parts contract, disconnecting the drive shaft 11 from the shafting assembly 3.

[0046] In some embodiments, in step S4, the output speed range of the main engine 1 is set through the main engine governor. Since there will be a certain fluctuation in the output speed of the main engine 1 when the main engine 1 operates without driving the shafting assembly 3 to rotate at the same time. Therefore, by adjusting the output speed range through the main engine governor, it can be ensured that the speed output by the main engine 1 is stable when the main engine 1 only drives the bearing-mounted motor to rotate.

[0047] In some embodiments, the drive shaft 11 of the main engine 1 is passed through the support bearing housing 12, and the bearing-mounted generator 2 is located between the main engine 1 and the support bearing housing 12. By providing the support bearing housing 12, the drive shaft 11 can be supported, thereby preventing the drive shaft 11 from bending and ensuring the stable rotation of the drive shaft 11.

[0048] In some embodiments, in step S3, after the shafting assembly 3 is disconnected from the drive shaft 11 of the main engine 1, the shafting assembly 3 is locked. Since during the mooring test of the bearing-mounted generator 2 for ships, the propeller 31 is pushed to rotate under the action of sea waves. During this process, the bearings of the shafting assembly 3 will be worn. Therefore, by locking the shafting assembly 3, the free rotation of the shafting assembly 3 can be avoided.

[0049] In some embodiments, a shaft locking device 5 is arranged in the ship, and the shafting assembly 3 is locked by using the shaft locking device 5. By providing the shaft locking device 5, the shafting assembly 3 can be directly locked.

[0050] In some embodiments, in step S5, the main engine 1 operates at the first output speed for a set duration; then the output speed of the main engine 1 is increased to the second output speed to test the bearing-mounted generator 2. By the above method, the main engine 1 first runs at a low speed at the first output speed, thereby ensuring the stability of the start of the main engine 1. After the set working duration, it is increased to the second output speed, so that the bearing-mounted generator 2 can be accurately tested.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Mooring test method for a shaft-mounted generator for ships, characterized in that, It includes the following steps: S1. Determine the operating speed range of the shaft-mounted generator (2) mounted on the drive shaft (11) of the main engine (1); S2. Conduct a mooring test on the main engine (1) and the propulsion system to ensure that the main engine (1) can operate normally; S3. Disconnect the shafting assembly (3) connected to the propeller (31) from the drive shaft (11) of the main engine (1); S4. Set the output speed range of the main engine (1); S5. Start the main engine (1), with the output speed of the main engine (1) within the output speed range and the output speed of the main engine (1) within the operating speed range of the shaft-mounted generator (2), and conduct a test on the shaft-mounted generator (2).

2. The mooring test method for the bearing-mounted generator for ships according to claim 1, characterized in that, In step S1, the shaft-mounted generator (2) is tested on a test bench to obtain the speed range of the shaft-mounted generator (2).

3. The mooring test method for the bearing-mounted generator for ships according to claim 1, characterized in that, In step S1, the minimum operating speed of the shaft-mounted generator (2) is not less than half of the maximum operating speed of the shaft-mounted generator (2).

4. The mooring test method for the shaft-mounted generator for ships according to claim 1, characterized in that The shafting assembly (3) is connected to the drive shaft (11) of the main engine (1) through a coupling (4). In step S3, the drive shaft (11) of the main engine (1) is separated from the shafting assembly (3) by disconnecting the coupling (4) from the drive shaft (11) of the main engine (1).

5. The mooring test method for the shaft-mounted generator for ships according to claim 4, characterized in that, The coupling (4) is a hydraulic coupling.

6. The mooring test method for the bearing-mounted generator for ships according to claim 1, characterized in that, In step S4, the output speed range of the main engine (1) is set through the main engine governor.

7. The mooring test method for the shaft-mounted generator for ships according to claim 1, characterized in that, The drive shaft (11) of the main engine (1) passes through a support bearing seat (12), and the shaft-mounted generator (2) is located between the main engine (1) and the support bearing seat (12).

8. The mooring test method for the bearing-mounted generator for ships according to claim 1, characterized in that, In step S3, after the shafting assembly (3) is disconnected from the drive shaft (11) of the main engine (1), the shafting assembly (3) is locked.

9. The mooring test method for the bearing-mounted generator for ships according to claim 8, characterized in that, A shaft locking device (5) is arranged on the ship, and the shafting assembly (3) is locked by using the shaft locking device (5).

10. The mooring test method for the shaft-mounted generator for ships according to claim 1, characterized in that, In step S5, the main engine (1) operates at a first output speed for a set duration; Then, the output speed of the main engine (1) is increased to a second output speed to conduct a test on the shaft-mounted generator (2).

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