Shock absorption control system of marine diesel engine

Abstract

The invention belongs to the technical field of ships, and particularly relates to a marine diesel engine damping control system which comprises a control cabinet, a brake cabinet and a host control system. The control cabinet comprises a controller and a frequency converter, the brake cabinet comprises a brake resistor and a temperature sensor, and the controller comprises a data receiving interface, a data output interface and a power supply communication interface. The shock absorber is simple and efficient in structural design, and the durability of the whole system is improved; by adding the control system, the damper can dynamically adjust the operation state at different rotating speeds of the diesel engine, and the reliability of the whole system is improved while the damping effect is optimized. In addition, the control system can display the current operation state of the shock absorber, and great convenience is brought to a user in use.

Description

Technical Field

[0001] The invention relates to the technical field of ships, and in particular to a ship diesel engine shock absorption control system. Background Art

[0002] When the ship's diesel engine is running, it will generate a second-order vertical moment. The superposition of this moment and the natural frequency of the hull will cause the hull to resonate. Excessive hull vibration will cause fatigue damage to the hull structure, affect the normal operation of the equipment and instruments on board, reduce the accuracy of use, shorten the service life, and in severe cases, cause the hull to break and even sink. At the same time, hull vibration also seriously affects the living comfort of crew members and passengers, the work efficiency and health of crew members. The main sources of hull vibration are propellers and diesel engines. Therefore, in order to ensure the safety and comfort of the ship during the operation of the diesel engine, it is particularly important to install a control system adapted to marine shock absorbers.

[0003] Currently, the commonly used shock absorbers for diesel engines on the market include rubber metal shock absorbers placed between the diesel engine and the hull base, or pneumatic shock absorbers placed in the cylinder and piston to reduce the vibration generated during the operation of the diesel engine. However, the current measures to reduce the vibration generated during the operation of the diesel engine are relatively simple and crude, mainly relying on the physical properties of the shock absorber to produce passive shock absorption effects. Although this method can meet the shock absorption needs of diesel engines to a certain extent, its reliability and durability still need to be further improved and optimized in long-term operation and complex environments. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems existing in the background technology, and for this purpose, a ship diesel engine shock absorption control system is provided.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A ship diesel engine vibration reduction control system, comprising:

[0007] The control cabinet is connected to the signal junction box of the host control system, and is used to receive the speed parameters of the ship's diesel engine, the shock absorber system enable signal and the fuel supply information, and is connected to the balance block speed sensor to monitor the speed parameters of the balance block, thereby obtaining the vibration parameters, and determining the expected motion data of the motor according to the vibration parameters to issue control instructions;

[0008] The brake cabinet is connected to the control cabinet. When the balance block decelerates, the control cabinet sends a control command to turn on the brake cabinet to absorb the kinetic energy of the motor.

[0009] The following is a technical solution further defined by the present invention, wherein the control cabinet comprises:

[0010] The controller receives the speed parameter of the ship diesel engine, thereby obtaining the vibration parameter, determines the expected motion data of the motor according to the vibration parameter, generates a control instruction according to the expected motion data, and simultaneously receives the speed and phase of the balancing block to monitor the operation of the balancing block;

[0011] The frequency converter is connected to the controller for communication, receives control instructions, controls the start and stop of the motor and the torque output of the motor according to the control instructions, and feeds back the motor speed and the state of the motor to the controller.

[0012] The following is a technical solution further defined by the present invention, wherein the brake cabinet comprises:

[0013] Braking resistors convert the energy generated by the motor into heat energy when the motor is decelerating or braking;

[0014] The temperature sensor monitors the temperature of the brake resistor. When the temperature exceeds the safety setting value, the system is powered off and the balance block is decelerated and shut down to achieve thermal protection function.

[0015] The following is a technical solution further defined by the present invention, wherein the controller comprises:

[0016] Data receiving interface, receiving digital and analog input signals to determine the operating conditions of the ship's diesel engine and balance block;

[0017] Data output interface, outputs digital and analog output signals, and provides motor control signals to the inverter;

[0018] Power supply communication interface, to supply power to the controller, its communication interface serves as a backup interface.

[0019] The following is a technical solution further defined by the present invention, wherein the control cabinet is connected to a host speed sensor of a host control system to detect the top dead center and bottom dead center signals of the host to obtain the speed and phase information of the host.

[0020] The following is a technical solution further defined by the present invention: the control cabinet is connected to a balancing block speed sensor to detect the top dead center signal of the balancing block and obtain the speed and phase information of the balancing block.

[0021] The following is a technical solution further defined by the present invention, wherein the control cabinet is connected to the control signal of the host control system, the host control system provides the control cabinet with a fuel supply status signal and an enable signal of the ship diesel engine shock absorption system, and the control cabinet feeds back the operating status of the ship diesel engine shock absorption system to the host control system.

[0022] The following is a technical solution further defined in the present invention, wherein the control cabinet includes a control panel operated by a user, and a manual start, manual shutdown, clear error button and a manual-automatic switching knob are provided on the control panel.

[0023] The following is a technical solution further defined by the present invention, wherein the balancing block is two counter-rotating compensation shafts driven by a motor, which are respectively arranged at the driving end and the free end of the diesel engine. The inverter of the control cabinet sends a control instruction to the motor to drive the balancing block to rotate, thereby achieving the diesel engine shock absorption effect.

[0024] Compared with the prior art, the present invention has the following technical effects:

[0025] The shock absorber structure of the present invention is simple and efficient in design, which improves the durability of the entire system; the addition of a control system allows the shock absorber to dynamically adjust its operating state at different speeds of the diesel engine, optimizing the shock absorption effect while improving the reliability of the entire system. In addition, the control system can display the current operating state of the shock absorber, which greatly facilitates the use of the user. While ensuring the simplicity and durability of the shock absorber design, the control cabinet makes the operation of the shock absorber more accurate and efficient; the brake cabinet can be connected to the control cabinet, and when the balance block decelerates, the control cabinet issues a control command to connect the brake cabinet to absorb the kinetic energy of the motor, thereby protecting the motor and the control system. The controller integrates the input and output of digital and analog quantities and the interface for communication, and has a simpler structure and is easy to maintain.

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 is a system architecture diagram of the present invention;

[0029] Figure 2 It is a structural diagram of a balancing block of the present invention;

[0030] Figure 3 It is the control cabinet structure diagram of the present invention;

[0031] Figure 4 It is a structural diagram of a brake cabinet of the present invention;

[0032] Figure 5 is a structural diagram of a controller of the present invention;

[0033] Figure 6 It is a structural diagram of a control panel operated by a user of the present invention.

[0034] Figure numerals: 1, inverter; 2, controller; 3, braking resistor. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0036] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0037] like Figure 1-6 As shown, a ship diesel engine shock absorption control system is provided, which mainly includes a control cabinet, a brake cabinet, and an engine control system (ECS).

[0038] The control cabinet is configured to be connected to the signal junction box of the main engine control system (ECS), receive the speed parameters of the ship's diesel engine, the shock absorber system enable signal and the fuel supply information, and is connected to the balance block speed sensor to monitor the speed parameters of the balance block, thereby obtaining the vibration parameters, and determine the expected movement data of the motor according to the vibration parameters to issue control instructions.

[0039] The brake cabinet is configured to be connected to the control cabinet. When the balancing block decelerates, the control cabinet sends a control command to connect the brake cabinet to absorb the kinetic energy of the motor.

[0040] The control cabinet includes the controller and the frequency converter.

[0041] The controller is configured to receive the speed parameter of the ship diesel engine, thereby obtaining the vibration parameter, determining the desired motion data of the motor according to the vibration parameter, and generating a control instruction according to the desired motion data. At the same time, it can receive the speed and phase of the balancing block and monitor the operation of the balancing block.

[0042] The frequency converter is connected to the controller for communication, and is configured to receive control instructions, control the start and stop of the motor and the torque output of the motor according to the control instructions, and feed back the speed and status of the motor to the controller.

[0043] The brake cabinet includes a brake resistor and a temperature sensor.

[0044] The brake resistor is configured to convert the energy generated by the motor into heat energy when the motor is decelerating or braking.

[0045] The temperature sensor is configured to monitor the temperature of the brake resistor. When the temperature exceeds the safe value, the system is powered off and the balancing block is decelerated and shut down to achieve thermal protection.

[0046] The controller includes a data receiving interface, a data output interface and a power supply communication interface.

[0047] The data receiving interface is configured to receive digital and analog input signals to determine the operating conditions of the diesel engine and the balancing block.

[0048] The data output interface is configured to output digital and analog output signals to provide the inverter with motor control signals.

[0049] The power supply communication interface is configured to be able to supply power to the controller, and its communication interface serves as a backup interface in this system.

[0050] The control cabinet is connected to the main engine speed sensor of the main engine control system (ECS) to detect the top dead center (TDC) and bottom dead center (BDC) signals of the main engine and obtain the speed and phase information of the main engine.

[0051] The control cabinet is connected to the balance block speed sensor to detect the top dead center (TDC) signal of the balance block and obtain the speed and phase information of the balance block.

[0052] The control cabinet is connected to the control signal of the main engine control system (ECS). The main engine control system (ECS) provides the control cabinet with the fuel supply status signal and the enable signal of the ship diesel engine shock absorption system. The control cabinet feeds back the operating status of the ship diesel engine shock absorption system to the main engine control system.

[0053] The control cabinet provides a user-operated control panel, which can be used to easily control the system using the Manual Start, Manual Stop, Reset Failure buttons and the Auto / Manual Mode knob.

[0054] The balance block is two counter-rotating compensation shafts driven by a motor, which are arranged at the driving end and free end of the diesel engine respectively. The inverter of the control cabinet sends control instructions to the motor to drive the balance block to rotate, thereby achieving the diesel engine shock absorption effect.

[0055] Installation location: The balance block is installed at the driving end and free end of the diesel engine, and the electronic control cabinet is installed on the diesel engine electronic control cabinet platform.

[0056] Working process: The control cabinet receives signals and instructions from the host control system and the user's operation, and controls the motor through the inverter inside the cabinet, thereby controlling the balance block. The brake cabinet is used to absorb the kinetic energy of the balance block during deceleration.

[0057] In this process, the present invention has the following significant features: 1. While ensuring the simplicity and durability of the shock absorber design, the control cabinet makes the operation of the shock absorber more accurate and efficient; 2. The brake cabinet can be connected to the control cabinet. When the balance block decelerates, the control cabinet issues a control command to connect the brake cabinet to absorb the kinetic energy of the motor, thereby protecting the motor and the control system. 3. The controller integrates the input and output of digital and analog quantities and the interface for communication, and has a simpler structure and is easy to maintain.

[0058] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A ship diesel engine shock absorption control system, characterized in that: include: The control cabinet is connected to the signal junction box of the host control system, and is used to receive the speed parameters of the ship's diesel engine, the shock absorber system enable signal and the fuel supply information, and is connected to the balance block speed sensor to monitor the speed parameters of the balance block, thereby obtaining the vibration parameters, and determining the expected motion data of the motor according to the vibration parameters to issue control instructions; The brake cabinet is connected to the control cabinet. When the balance block decelerates, the control cabinet sends a control command to turn on the brake cabinet to absorb the kinetic energy of the motor.

2. A marine diesel engine shock absorption control system as claimed in claim 1, characterized in that: The control cabinet comprises: The controller receives the speed parameter of the ship diesel engine, thereby obtaining the vibration parameter, determines the expected motion data of the motor according to the vibration parameter, generates a control instruction according to the expected motion data, and simultaneously receives the speed and phase of the balancing block to monitor the operation of the balancing block; The frequency converter is connected to the controller for communication, receives control instructions, controls the start and stop of the motor and the torque output of the motor according to the control instructions, and feeds back the motor speed and the state of the motor to the controller.

3. A marine diesel engine shock absorption control system as claimed in claim 1, characterized in that: The brake cabinet comprises: Braking resistors convert the energy generated by the motor into heat energy when the motor is decelerating or braking; The temperature sensor monitors the temperature of the brake resistor. When the temperature exceeds the safety setting value, the system is powered off and the balance block is decelerated and shut down to achieve thermal protection function.

4. A marine diesel engine shock absorption control system as claimed in claim 2, characterized in that: The controller comprises: Data receiving interface, receiving digital and analog input signals to determine the operating conditions of the ship's diesel engine and balance block; Data output interface, outputs digital and analog output signals, and provides motor control signals to the inverter; Power supply communication interface, to supply power to the controller, its communication interface serves as a backup interface.

5. A marine diesel engine shock absorption control system as claimed in claim 1, characterized in that: The control cabinet is connected to the main engine speed sensor of the main engine control system to detect the top dead center and bottom dead center signals of the main engine and obtain the speed and phase information of the main engine.

6. A marine diesel engine shock absorption control system as claimed in claim 1, characterized in that: The control cabinet is connected to the balancing block speed sensor to detect the top dead center signal of the balancing block and obtain the speed and phase information of the balancing block.

7. A marine diesel engine shock absorption control system as claimed in claim 1, characterized in that: The control cabinet is connected to the control signal of the host control system. The host control system provides the control cabinet with an oil supply status signal and an enable signal of the ship diesel engine shock absorption system. The control cabinet feeds back the operating status of the ship diesel engine shock absorption system to the host control system.

8. A marine diesel engine shock absorption control system as claimed in claim 1, characterized in that: The control cabinet comprises a control panel operated by a user, on which are arranged a manual start, a manual close, a clear error button and a manual-automatic switching knob.

9. A marine diesel engine shock absorption control system as claimed in claim 1, characterized in that: The balancing blocks are two counter-rotating compensation shafts driven by a motor, which are arranged at the driving end and free end of the diesel engine respectively. The inverter of the control cabinet sends control instructions to the motor to drive the balancing blocks to rotate, thereby achieving the diesel engine shock absorption effect.

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