Double-starting ship engine

Abstract

The utility model relates to the technical field of ship engines, and discloses a double-starting ship engine which comprises an engine, an air starting loop started by compressed air, an electric starting loop started by electric energy and a control device, and the air starting loop and the electric starting loop are both in signal connection with the control device. The control device is used for controlling on-off of the air starting loop and the electric starting loop, when one of the air starting loop and the electric starting loop is connected, the engine is started, and therefore the air starting mode and the electric starting mode are achieved, and engine failure caused by failure of a single starting mode is avoided. And the starting reliability and the overall reliability of the engine are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ship engines, and more particularly to a dual-start ship engine. Background Art

[0002] At present, ship engines usually adopt a single gas start or electric start method. Considering that it is difficult to repair the ship engine after the ship, especially the ocean-going ship, leaves the port, once the single starting method fails, the engine cannot work normally, which will seriously affect the safe operation of the ship and lead to low safety and reliability of the ship operation.

[0003] In summary, how to improve the reliability of the engine is a problem that needs to be urgently solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide a dual-start marine engine having two starting modes: air starting and electric starting, thereby avoiding engine failure caused by failure of a single starting mode and improving engine reliability.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] A dual-start marine engine comprises an engine, an air starting circuit for starting with compressed air, an electric starting circuit for starting with electric energy, and a control device. The air starting circuit and the electric starting circuit are both connected to the control device by signal. The control device is used to control the on / off of the air starting circuit and the electric starting circuit. When one of the air starting circuit and the electric starting circuit is connected, the engine starts.

[0007] Preferably, the air starting circuit includes an air compressor for providing high-pressure compressed air, an air bottle for storing high-pressure compressed air, and an air starting motor. Compressed air pipelines are provided between the air compressor and the air bottle, and between the air bottle and the air starting motor. The compressed air pipelines are provided with a pressure regulating valve for adjusting the compressed air pressure and a pneumatic solenoid valve for controlling the on-off of the air circuit. The pneumatic solenoid valve is connected to the control device signal.

[0008] Preferably, the pneumatic solenoid valve is provided between the pressure regulating valve and the air starting motor, and a stop valve for controlling the on-off of the air path is provided between the air bottle and the pressure regulating valve.

[0009] Preferably, a pressure sensor is provided between the pressure regulating valve and the pneumatic solenoid valve, and the pressure sensor is used to detect the starting air pressure P in the compressed air pipeline. k , the pressure sensor is signal-connected to the control device.

[0010] Preferably, the electric starting circuit includes a starting power supply, an electric starting switch and an electric starting motor. The electric starting switch is signal-connected to the control device. When the electric starting switch is closed, the power supply circuit between the electric starting motor and the starting power supply is connected.

[0011] Preferably, a voltage sensor for detecting the starting power supply pressure V0 is provided in the electric starting circuit, and the voltage sensor is signal-connected to the control device.

[0012] Preferably, both the pneumatic starting circuit and the electric starting circuit are provided with a cranking interlock contact. When the engine is in a cranking interlock state, the cranking interlock contact is disconnected; when the engine is in a cranking unlock state, the cranking interlock contact is connected.

[0013] Preferably, a flywheel ring gear is provided on the outer sleeve of the input shaft of the engine, and the air starting motor of the air starting circuit and the electric starting motor of the electric starting circuit are both provided with a driving gear for meshing with the flywheel ring gear.

[0014] Preferably, the flywheel ring gear is provided with a speed sensor for detecting the engine speed n, and the speed sensor is signal-connected to the control device.

[0015] The dual-start ship engine provided by the utility model is provided with an air starting circuit and an electric starting circuit. The failure of one starting circuit will not affect the normal operation of the other starting circuit, thereby avoiding the problem of engine failure caused by the failure of a single starting circuit, improving the reliability of the engine, especially the starting reliability of the engine, and ensuring the safe operation of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of the dual-start marine engine provided by the present invention.

[0018] Figure 1 middle:

[0019] 1-Engine; 2-Air compressor; 3-Air bottle; 4-Stop valve; 5-Pressure regulating valve; 6-Pressure sensor; 7-Cranking interlock contact; 8-Pneumatic solenoid valve; 9-Air starting motor; 10-Starting power supply; 11-Electric starting switch; 12-Voltage sensor; 13-Electric starting motor; 14-Flywheel ring gear; 15-Speed ​​sensor; 16-Control device. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The core of the utility model is to provide a dual-start marine engine with two starting modes, air starting and electric starting, which avoids engine failure caused by failure of a single starting mode and improves engine reliability.

[0022] The dual-start marine engine provided by the present invention can be applied to various types of ships, including an engine 1, an air starting circuit for starting using compressed air, an electric starting circuit for starting using electric energy, and a control device 16. The air starting circuit and the electric starting circuit are both connected to the control device 16 by signal. The control device 16 is used to control the on and off of the air starting circuit and the electric starting circuit. When one of the air starting circuit and the electric starting circuit is connected, the engine 1 starts.

[0023] Among them, the pneumatic starting circuit can use compressed air to start the pneumatic starting motor 9, and then transmit the torque of the pneumatic starting motor 9 through the transmission mechanism to drive the engine 1 to rotate; the electric starting circuit can drive the electric starting motor 13 to rotate through electrical energy, and then transmit the torque of the electric starting motor 13 through the transmission mechanism to drive the engine 1 to rotate.

[0024] The transmission mechanism can be set as a common transmission mechanism such as a gear transmission mechanism, a conveyor belt mechanism, etc. Considering the installation space and cost, it is preferred to set the input shaft outer sleeve of the engine 1 to be provided with a flywheel ring gear 14, and the air starting motor 9 of the air starting circuit and the electric starting motor 13 of the electric starting circuit are both provided with a driving gear for engaging with the flywheel ring gear 14.

[0025] Both the pneumatic starting circuit and the electric starting circuit are connected to the control device 16 by signal. The control device 16 is used to receive control instructions from the ship power system, control the on and off of the pneumatic starting circuit and the electric starting circuit, and monitor the working status of the engine 1. For example, before starting, it monitors whether the engine 1 is in the cranking interlock state, and after starting, it monitors whether the engine speed n of the engine 1 after starting is normal.

[0026] To avoid starting engine 1 in the cranking interlock state, please refer to Figure 1 , both the air starting circuit and the electric starting circuit are provided with a cranking interlock contact 7. When the engine 1 is in the cranking interlock state, the cranking interlock contact 7 is disconnected, and both the air starting circuit and the electric starting circuit cannot be connected;

[0027] When the engine 1 is in the cranking unlocked state, the cranking interlock contact 7 is connected, and the cranking interlock contact 7 no longer affects the connection of the air starting circuit and the electric starting circuit.

[0028] It should be noted that when both the air starting circuit and the electric starting circuit meet the starting conditions, in order to ensure the normal operation of the engine 1, only one of the air starting circuit and the electric starting circuit is controlled to be connected, and the control device 16 is usually set to preferentially connect the air starting circuit.

[0029] In this embodiment, the ship engine is provided with an air starting circuit and an electric starting circuit. The failure of one starting circuit will not affect the normal operation of the other starting circuit, thereby avoiding the problem of engine failure caused by the failure of a single starting circuit, improving the engine reliability, especially the starting reliability of the engine, and ensuring the safe operation of the ship.

[0030] On the basis of the above embodiment, the air starting circuit is defined, and the air starting circuit includes an air compressor 2 for providing high-pressure compressed air, an air bottle 3 for storing high-pressure compressed air, and an air starting motor 9. Compressed air pipelines are provided between the air compressor 2 and the air bottle 3, and between the air bottle 3 and the air starting motor 9. The compressed air pipelines are provided with a pressure regulating valve 5 for adjusting the compressed air pressure and a pneumatic solenoid valve 8 for controlling the on-off of the air path. The pneumatic solenoid valve 8 is connected to the control device 16 for signal connection.

[0031] The air compressor 2 is used to compress air to produce high-pressure compressed air, and the air bottle 3 is used to store the high-pressure compressed air. The two together constitute the high-pressure air source. The high-pressure compressed air produced by the air compressor 2 is output to the air bottle 3 for storage, so as to reduce the starting response time of the air starting circuit.

[0032] The pressure regulating valve 5 can regulate the compressed air pressure in the compressed air pipeline. Since the compressed air pressure of the high-pressure compressed air produced by the air compressor 2 is usually higher than the starting air pressure P required for starting the air starting circuit, k, It is usually set as a pressure reducing valve;

[0033] The pneumatic solenoid valve 8 is usually arranged between the pressure regulating valve 5 and the air starter motor 9, and the pneumatic solenoid valve 8 is connected to the control device 16 by signal, so that the pneumatic solenoid valve 8 can control the on and off of the compressed air pipeline to start or shut down the air starter motor 9.

[0034] In order to facilitate the inspection and troubleshooting of the gas starting circuit, a stop valve 4 for controlling the on-off of the gas circuit is usually provided between the air bottle 3 and the pressure regulating valve 5. The stop valve 4 can divide the gas starting circuit into a high-pressure extraction part and a starting control part.

[0035] After the control device 16 receives the start-up command of the ship power system, it controls the pneumatic solenoid valve 8 to be turned on. The high-pressure compressed air compressed by the air compressor 2 passes through the air bottle 3, the pressure regulating valve 5 and the pneumatic solenoid valve 8 in sequence and enters the air starter motor 9. The high-pressure compressed air drives the air starter motor 9 to rotate and output torque to the outside.

[0036] If the compressed air pressure of the high-pressure compressed air is too low, it will cause the air starter motor 9 to be difficult to start normally. On the basis of the above embodiment, in order to ensure the normal pneumatic operation of the air starter motor 9, a pressure sensor 6 is provided between the pressure regulating valve 5 and the pneumatic solenoid valve 8. The pressure sensor 6 is used to detect the starting air pressure P in the compressed air pipeline. k The pressure sensor 6 is signal-connected to the control device 16 .

[0037] The pressure sensor 6 is connected to the control device 16 signal, and the control device 16 can compare the starting air pressure P k and minimum starting air pressure P min , determine whether the gas starting circuit meets the starting conditions;

[0038] When the starting air pressure P k Greater than or equal to the minimum starting air pressure P min When , the control device 16 controls the pneumatic solenoid valve 8 to be turned on;

[0039] On the contrary, when the starting air pressure P k Less than the minimum starting air pressure P min When the pressure drops below 0.05, the control device 16 issues an alarm through the sound and light alarm device and outputs a low starting air pressure signal to the ship power system.

[0040] Based on the above embodiment, the electric starting circuit includes a starting power supply 10, an electric starting switch 11 and an electric starting motor 13. The electric starting switch 11 is connected to the control device 16 for signal communication. When the electric starting switch 11 is closed, the power supply circuit between the electric starting motor 13 and the starting power supply 10 is connected, and the electric starting motor 13 is energized and rotates.

[0041] If the current and voltage of the electric starting circuit are too low, it will also affect the normal starting of the electric starting motor 13. Preferably, a voltage sensor 12 for detecting the starting power supply pressure V0 is provided in the electric starting circuit. The voltage sensor 12 is connected to the control device 16 for signal connection.

[0042] The voltage sensor 12 is connected to the control device 16 for signal communication. The control device 16 can compare the starting power supply pressure V0 with the minimum starting power supply pressure V min , determine whether the electric starting circuit meets the starting conditions;

[0043] When the starting power supply pressure V0 is greater than or equal to the minimum starting power supply pressure V min When , the control device 16 controls the electric start switch 11 to close;

[0044] On the contrary, when the starting power supply pressure V0 is less than the minimum starting power supply pressure V min When the voltage drops below 0.05 V, the control device 16 issues an alarm through the sound and light alarm device and outputs a low starting power supply pressure signal to the ship power system.

[0045] On the basis of the above embodiment, after the engine 1 is started, in order to conveniently determine whether the engine 1 is started normally, a speed sensor 15 for detecting the engine speed n can be provided on the flywheel ring gear 14, and the speed sensor 15 is connected to the control device 16 for signal connection.

[0046] The control device 16 is used to receive the engine speed n measured by the speed sensor 15 and determine whether the engine 1 is successfully started by comparing the engine speed n with the engine successful start speed n0;

[0047] When the engine speed n is greater than or equal to the engine successful starting speed n0, the control device 16 determines that the engine 1 has been successfully started and ends the starting process;

[0048] When the engine speed n is less than the engine successful start speed n0, the control device 16 enters the engine single start number M judgment. When the engine single start number M is less than or equal to the maximum single start number M min When the engine starts once more, the control device 16 controls the gas starting circuit and the electric starting circuit to start again after the minimum time interval allowed, and when the number of single engine starts M is greater than the maximum number of single engine starts M min When the alarm is triggered, the control device 16 issues an alarm through the sound and light alarm device, and outputs a low starting power supply pressure signal to the ship power system, and outputs a start number reaching the limit value signal to the ship power system, so that the ship engine can be repaired and troubleshooted in time.

[0049] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0050] The above describes in detail the dual-start marine engine provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are intended only to facilitate understanding of the method and core concepts of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A double-start marine engine, characterized in that: The invention comprises an engine (1), a pneumatic starting circuit for starting with compressed air, an electric starting circuit for starting with electric energy, and a control device (16). The pneumatic starting circuit and the electric starting circuit are both connected to the control device (16) by signal. The control device (16) is used to control the on / off of the pneumatic starting circuit and the electric starting circuit. When one of the pneumatic starting circuit and the electric starting circuit is connected, the engine (1) starts.

2. The dual-start marine engine according to claim 1, characterized in that: The air starting circuit comprises an air compressor (2) for providing high-pressure compressed air, an air bottle (3) for storing high-pressure compressed air, and an air starting motor (9). Compressed air pipelines are provided between the air compressor (2) and the air bottle (3), and between the air bottle (3) and the air starting motor (9). The compressed air pipelines are provided with a pressure regulating valve (5) for regulating the compressed air pressure and a pneumatic solenoid valve (8) for controlling the on-off of the air path. The pneumatic solenoid valve (8) is connected to the control device (16) for signal communication.

3. The dual-start marine engine according to claim 2, characterized in that: The pneumatic solenoid valve (8) is provided between the pressure regulating valve (5) and the air starting motor (9), and a stop valve (4) for controlling the on-off of the air path is provided between the air bottle (3) and the pressure regulating valve (5).

4. The dual-start marine engine according to claim 3, characterized in that: A pressure sensor (6) is provided between the pressure regulating valve (5) and the pneumatic solenoid valve (8), and the pressure sensor (6) is used to detect the starting air pressure P in the compressed air pipeline. k The pressure sensor (6) is signal-connected to the control device (16).

5. The dual-start marine engine according to claim 1, characterized in that: The electric starting circuit includes a starting power supply (10), an electric starting switch (11) and an electric starting motor (13). The electric starting switch (11) is signal-connected to the control device (16). When the electric starting switch (11) is closed, the power supply circuit between the electric starting motor (13) and the starting power supply (10) is connected.

6. The dual-start marine engine according to claim 5, characterized in that: A voltage sensor (12) for detecting a starting power supply pressure V0 is provided in the electric starting circuit, and the voltage sensor (12) is signal-connected to the control device (16).

7. The dual-start marine engine according to any one of claims 1 to 6, characterized in that: A cranking interlock contact (7) is provided in both the pneumatic starting circuit and the electric starting circuit. When the engine (1) is in a cranking interlock state, the cranking interlock contact (7) is disconnected, and when the engine (1) is in a cranking unlock state, the cranking interlock contact (7) is connected.

8. The dual-start marine engine according to any one of claims 1 to 6, characterized in that: The input shaft of the engine (1) is provided with a flywheel ring gear (14) on its outer sleeve, and the air starting motor (9) of the air starting circuit and the electric starting motor (13) of the electric starting circuit are both provided with driving gears for meshing with the flywheel ring gear (14).

9. The dual-start marine engine according to claim 8, characterized in that: The flywheel ring gear (14) is provided with a rotation speed sensor (15) for detecting the engine rotation speed n, and the rotation speed sensor (15) is connected to the control device (16) via a signal.

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