Joint debugging test method for axle generator

Abstract

The invention provides an axle generator joint debugging test system and a control method thereof. The axle generator joint debugging test system comprises a dragging motor, an axle generator, an axle frequency converter, a transformer, a load frequency converter, a shore power frequency converter and a dragging motor frequency converter. The axle generator is connected with the dragging motor; the axle frequency converter is connected with the axle generator; the transformer is connected with the frequency converter; the load frequency converter is connected with the transformer; the shore power frequency converter is connected with the load frequency converter; and the dragging motor frequency converter is connected with the shore power frequency converter. The joint debugging test is controlled through a system constructed by a frequency converter, a dragging motor and an axle generator configured by the system, and the technical problem that a system and a test method for joint debugging of the axle generator are lacked in the prior art is solved.

Description

Technical Field:

[0001] The present invention relates to the field of joint debugging of shaft generators, and in particular to a method for joint debugging test of shaft generators. Background Art:

[0002] Currently, fixed-pitch propeller shaft generator systems are increasingly widely used. The ship is propelled by the thrust generated by the rotation of the propeller. The fixed-pitch propeller shaft generator system is that the shaft generator system and the propeller are installed on the same shafting (which may be divided into several sections), and the rotation of the shafting drives the propeller and the shaft generator to rotate and generate electricity at the same time. The fixed-pitch propeller shaft generator is inseparable from the propeller shafting. Limited by the depth of the dock water and the dock tension, etc., the shaft generator system cannot complete the test before sailing and can only be tested at sea. During the sea test, dozens to hundreds of tons of fuel are consumed every day, and the number of trial voyage personnel per ship is nearly 180, and it costs 300,000 - 500,000 yuan per day. Since the shaft generator system cannot be tested at the dock, the risk of problems at sea is very high and the loss is huge. Therefore, there is an urgent need to find a solution to reduce the sea trial risk of shaft generators.

[0003] There is an urgent need for a method for joint debugging test of shaft generators, which helps to solve the technical problem that there is a lack of a system and test method for joint debugging of shaft engines in the prior art. Summary of the Invention:

[0004] In one embodiment, the present invention provides a system for joint debugging test of shaft generators. The system constructs a system through the configured frequency converter, driving motor, and shaft generator to control the joint debugging test, which helps to solve the technical problem that there is a lack of a system and test method for joint debugging of shaft engines in the prior art.

[0005] The system for joint debugging test of shaft generators includes a driving motor, a shaft generator, a shaft frequency converter, a transformer, a load frequency converter, a shore power frequency converter, and a driving motor frequency converter;

[0006] The shaft generator is connected to the driving motor;

[0007] The shaft frequency converter is connected to the shaft generator;

[0008] The transformer is connected to the frequency converter;

[0009] The load frequency converter is connected to the transformer;

[0010] The shore power frequency converter is connected to the load frequency converter;

[0011] The driving motor frequency converter is connected to the shore power frequency converter.

[0012] In one embodiment, the driving motor and the shaft generator are connected by a high-elastic or driving shafting system.

[0013] In one embodiment, the shaft generator joint commissioning test system further includes an onshore power supply;

[0014] The onshore power supply is connected to the shore power frequency converter.

[0015] In one embodiment, the present invention also provides a control method for a shaft generator joint commissioning test system, based on the shaft generator joint commissioning test system as described above;

[0016] The control method includes:

[0017] Convert alternating current to direct current by passing the onshore power supply through the shore power frequency converter;

[0018] Start the driving motor frequency converter so that its speed meets the predetermined required speed;

[0019] Start the shaft frequency converter to convert the alternating current generated by the shaft generator into direct current, and finally become alternating current output to the transformer.

[0020] In one embodiment, after the step of starting the shaft frequency converter to convert the alternating current generated by the shaft generator into direct current and finally becoming alternating current output to the transformer, the method further includes:

[0021] Adjust the power of the load frequency converter to simulate the change of ship load.

[0022] In one embodiment, after the step of adjusting the power of the load frequency converter to simulate the change of ship load, the method further includes:

[0023] The driving motor frequency converter controls the driving motor to output a higher torque to meet the requirement of the shaft generator for increased torque.

[0024] In one embodiment, after the step of the driving motor frequency converter controlling the driving motor to output a higher torque to meet the requirement of the shaft generator for increased torque, the method further includes:

[0025] Adjust the power of the load frequency converter to complete the load, overload, and sudden addition and removal tests of the shaft generator. Description of the drawings:

[0026] Figure 1 It is a schematic structural diagram of a shaft generator joint commissioning test system in an embodiment of the present invention.

[0027] Reference numerals:

[0028] Driving motor 1

[0029] Shaft generator 2

[0030] Shaft frequency converter 3

[0031] Transformer 4

[0032] Load frequency converter 5

[0033] Shore power frequency converter 6

[0034] Drive motor frequency converter 7

[0035] Onshore power supply 8 Specific embodiments:

[0036] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference is made herein to the various aspects and features of the present application with reference to the accompanying drawings.

[0038] These and other features of the present application will become apparent from the following description of the preferred forms of the embodiments given as non - limiting examples with reference to the accompanying drawings.

[0039] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art can surely implement many other equivalent forms of the present application, which have the features as described in the claims and thus are all within the protection scope defined thereby.

[0040] When combined with the accompanying drawings, the above - mentioned and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description.

[0041] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of the present application and can be implemented in many ways. Well - known and / or repetitive functions and structures are not described in detail to clarify the true intent based on the user's historical operations and to avoid obscuring the present application with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but are merely used as a basis for the claims and a representative basis for teaching those skilled in the art to use the present application in substantially any suitable detailed structure in a variety of ways.

[0042] This specification may use the phrases "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments", each of which may refer to one or more of the same or different embodiments of the present application.

[0043] In view of the above problems, it is proposed that the shaft generator system of one of the ships in the same series needs to be jointly adjusted in the factory (this must be completed before the sea trial of the first ship), and the items of the sea trial are advanced to the factory stage for verification to reduce the risk of the sea trial.

[0044] Guangzhou Shipyard International is a leader in the global market for building handy-sized liquid cargo ships. It has first-class core technologies in the design and construction of oil tankers and has formed an independently developed and designed "Guangzhou Shipyard Type" oil tanker brand. The 50,000-ton methanol dual-fuel chemical / oil product tanker independently developed, designed and built by Guangzhou Shipyard International is equipped with a new type of shaft generator system and uses this new technology solution.

[0045] Guangzhou Shipyard International has developed the MR tanker fuel plus methanol dual-fuel technology, and the order amount of the 50,000-ton methanol dual-fuel powered chemical / oil product tanker developed exceeds 4 billion yuan.

[0046] Figure 1 This is a schematic structural diagram of a shaft generator joint adjustment test system in an embodiment of the present invention. As Figure 1 shown, the present invention provides a shaft generator joint adjustment test system. The shaft generator joint adjustment test system includes a driving motor 1, a shaft generator 2, a shaft frequency converter 3, a transformer 4, a load frequency converter 5, a shore power frequency converter 6, and a driving motor frequency converter 7;

[0047] The shaft generator 2 is connected to the driving motor 1;

[0048] The shaft frequency converter 3 is connected to the shaft generator 2;

[0049] The transformer 4 is connected to the frequency converter 3;

[0050] The load frequency converter 5 is connected to the transformer 4;

[0051] The shore power frequency converter 6 is connected to the load frequency converter 5;

[0052] The driving motor frequency converter 7 is connected to the shore power frequency converter 6.

[0053] In this embodiment, a specific implementation manner of a shaft generator joint adjustment test system is provided, and its working principle is as follows:

[0054] The onshore power supply is rectified into direct current through the E6 circuit by the shore power frequency converter 7, reaches the driving motor frequency converter through the E4 circuit, and controls the driving motor 1 from the E5 circuit. The driving motor drives the high elasticity 2 to drive the shaft generator 3 to rotate and generate electricity. After the shaft generator 3 generates electricity, it is connected to the frequency converter 4 through the E1 circuit. The frequency converter 4 passes through the E2 circuit, the transformer 5, and the E3 circuit to reach the load frequency converter 6. After the load frequency converter 6 is rectified, it is connected in parallel with the shore power frequency converter 7 to provide power for the driving motor.

[0055] In addition, as Figure 1As shown, E1 represents the circuit from the shaft generator to the frequency converter, E2 represents the circuit from the frequency converter to the transformer, E3 represents the circuit from the transformer to the load frequency converter, E4 represents the DC bus circuit, and E5 represents the circuit from the drive frequency converter to the drive motor.

[0056] In one embodiment, the drive motor 1 and the shaft generator 2 are connected by a high-elastic or drive shafting.

[0057] In one embodiment, the shaft generator joint commissioning test system further includes an onshore power supply 8;

[0058] The onshore power supply 8 is connected to the shore power frequency converter 6.

[0059] In one embodiment, the present invention also provides a control method for the shaft generator joint commissioning test system, based on the described shaft generator joint commissioning test system;

[0060] The control method includes:

[0061] Convert the alternating current from the onshore power supply 8 into direct current through the shore power frequency converter 6;

[0062] Start the drive motor frequency converter 7 to control the drive motor 1 so that its speed meets the predetermined required speed, and complete the conversion of electrical energy into mechanical energy.

[0063] Start the shaft frequency converter 3 to convert the alternating current generated by the shaft generator 2 (complete the conversion of mechanical energy into electrical energy) into direct current through the shaft frequency converter 3, and finally output it as alternating current to the transformer 4, (complete the AC-DC-AC conversion and realize the control of the shaft generator system).

[0064] In one embodiment, after the step of starting the shaft frequency converter 3 to convert the alternating current generated by the shaft generator 2 into direct current and finally output it as alternating current to the transformer 4, the method further includes:

[0065] Adjust the power of the load frequency converter 5 to simulate the change of the ship load. Achieve power adjustment. For example, when the power increases, the power of the frequency converter and the shaft generator 2 increases, and the torque of the shaft generator increases.

[0066] In one embodiment, after the step of adjusting the power of the load frequency converter 5 to simulate the change of the ship load, the method further includes:

[0067] The drive motor frequency converter 7 controls the drive motor 1 to output a higher torque to meet the requirement of the shaft generator 2 for an increase in torque.

[0068] In one embodiment, after the step of controlling the drive motor frequency converter 7 to control the drive motor 1 to output a higher torque to meet the requirement of the shaft generator 2 for an increase in torque, the method further includes:

[0069] Adjust the power of the load frequency converter 5 to complete the load, overload, sudden addition and sudden removal tests of the shaft generator 2, and verify that the shaft generator system software and matching meet the design requirements. Finally, complete the emergency removal of the high-elasticity test.

[0070] Beneficial effects:

[0071] 1. The new solution advances the projects that can only be verified at sea to the factory stage, winning time to reduce the risks of the shaft generator system.

[0072] 2. The new solution has completed the emergency removal of the high-elasticity test, creating conditions for obtaining evidence for the shaft generator.

[0073] 3. The new solution reduces the risks of the shaft generator system during sea trials and avoids losses.

[0074] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention..

Claims

1. An alignment test system for a shaft generator, characterized in that, The shaft generator joint debugging test system includes: A driving motor (1); A shaft generator (2), which is connected to the driving motor (1); A shaft frequency converter (3), which is connected to the shaft generator (2); A transformer (4), which is connected to the frequency converter (3); A load frequency converter (5), which is connected to the transformer (4); A shore power frequency converter (6), which is connected to the load frequency converter (5); A driving motor frequency converter (7), which is connected to the shore power frequency converter (6).

2. The shaft generator joint debugging test system according to claim 1, wherein The driving motor (1) and the shaft generator (2) are connected by a high-elastic or driving shafting.

3. The shaft generator joint debugging test system according to claim 2, wherein, The shaft generator joint debugging test system further includes: An onshore power supply (8), which is connected to the shore power frequency converter (6).

4. A control method for a shaft-driven generator joint debugging test system, characterized in that, Based on the shaft generator joint debugging test system according to any one of claims 1 to 3; The control method includes: Converting the alternating current of the onshore power supply 8) into direct current through the shore power frequency converter (6); Starting the driving motor frequency converter (7) so that its speed meets the predetermined required speed; Starting the shaft frequency converter (3) to convert the alternating current generated by the shaft generator (2) into direct current, and finally becoming alternating current output to the transformer (4).

5. The control method of the shaft generator joint debugging test system according to claim 4, characterized in that After the step of starting the shaft frequency converter (3) to convert the alternating current generated by the shaft generator (2) into direct current and finally becoming alternating current output to the transformer (4), the method further includes: Adjusting the power of the load frequency converter (5) to simulate the change of ship load.

6. The control method of the shaft generator joint debugging test system according to claim 5, characterized in that After the step of adjusting the power of the load frequency converter (5) to simulate the change of ship load, the method further includes: The driving motor frequency converter (7) controls the driving motor (1) to output a higher torque to meet the requirement of the shaft generator (2) for increased torque.

7. The control method of the shaft generator joint debugging test system according to claim 6, characterized in that After the step of the driving motor frequency converter (7) controlling the driving motor (1) to output a higher torque to meet the requirement of the shaft generator (2) for increased torque, the method further includes: Adjusting the power of the load frequency converter (5) to complete the load, overload, sudden addition and sudden removal tests of the shaft generator (2).

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