Marine main engine cylinder sleeve preheating system

Abstract

The invention relates to the technical field of ship engineering, in particular to a ship main engine cylinder sleeve preheating system which comprises a generator set and a generator set cooling system, the generator set is provided with a heat dissipation cavity, and the generator set cooling system is provided with a cooler used for cooling heat exchange liquid flowing out of the heat dissipation cavity. A liquid outlet of the heat dissipation cavity, a liquid inlet of the preheating cavity, a liquid outlet of the preheating cavity, a liquid inlet of the cooler, a liquid outlet of the cooler and a liquid inlet of the heat dissipation cavity are communicated in sequence, heat exchange liquid flowing out of the heat dissipation cavity flows into the preheating cavity, preheating of the engine cylinder sleeve is achieved, the temperature of the heat exchange liquid flowing out of the preheating cavity is reduced, and heat exchange efficiency is improved. The heat exchange liquid with the reduced temperature flows into the cooler to be further cooled and then flows into the heat dissipation cavity to cool the generator set again, heat generated during operation of the generator set is used for preheating the main engine cylinder sleeve, a preheating device does not need to be arranged for preheating the main engine cylinder sleeve, energy consumption of the main engine cylinder sleeve preheating system is reduced, and the service life of the main engine cylinder sleeve is prolonged. And the operation power of the cooler is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of ship engineering, and in particular to a cylinder liner preheating system for a main engine of a ship. Background Art

[0002] The cylinder liner of the ship's main engine needs to be preheated when it is started in cold state, so it is necessary to equip it with a preheating system specifically for the main engine cylinder liner. The system is mainly composed of a preheating device with a pump group, valves, pipelines, etc. The operation of the preheating device consumes heat.

[0003] When a ship is moored at a port or dock, at least one generator set needs to be kept in operation to ensure the basic power supply needs of the entire ship. The generator set cooling water system is essential and needs to be kept running for a long time in order to cool the generator set body. The generator set cooling system includes a pump body and a cooler connected in a closed loop through pipes. The pump body drives the cold water flowing out of the cooler to the heat dissipation cavity of the generator set. The cold water flows into the heat dissipation cavity and absorbs the heat of the main generator set to form hot water. The hot water flows into the cooler through the hot water inlet of the cooler. The hot water flowing into the cooler is cooled by the cooler to form cold water, which flows out from the cold water outlet of the cooler and flows into the heat dissipation cavity again. The cooler often dissipates heat into the air by air cooling, resulting in heat waste.

[0004] The preheating device used to preheat the cylinder liner of the ship's main engine consumes heat during operation, which increases the energy consumption during the operation of the ship; the heat energy wasted by the cooling system of the generator set reduces the heat utilization rate of the ship. Summary of the invention

[0005] The technical problem to be solved by the present invention is that in existing ships, the preheating device of the main engine cylinder liner preheating system consumes heat during operation, which increases the energy consumption during ship operation; the heat energy wasted by the main generator set cooling system reduces the heat utilization rate of the ship.

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a ship main engine cylinder liner preheating system, which is used to introduce preheating liquid into the preheating chamber of the main engine cylinder liner. The main engine cylinder liner preheating system includes a generator set and a generator set cooling system. The generator set has a heat dissipation chamber. The generator set cooling system has a cooler for cooling the heat exchange liquid flowing out of the heat dissipation chamber. The liquid outlet of the heat dissipation chamber, the liquid inlet of the preheating chamber, the liquid outlet of the preheating chamber, the liquid inlet of the cooler, the liquid outlet of the cooler and the liquid inlet of the heat dissipation chamber are connected in sequence.

[0007] As a preferred embodiment, the generator set cooling system includes a pump body, the liquid inlet of the pump body is connected to the liquid outlet of the heat dissipation cavity, and the liquid outlet of the pump body is connected to the liquid inlet of the preheating cavity and the liquid inlet of the cooler.

[0008] As a preferred solution, the liquid outlet of the pump body is connected to the liquid inlet of the preheating chamber through a first pipeline, and a first flow regulating valve is provided in the first pipeline;

[0009] The ship main engine cylinder liner preheating system also includes a control system, and the first flow regulating valve is electrically connected to the control system.

[0010] As a preferred solution, the pump body is a variable frequency pump, and the pump body is electrically connected to the control system.

[0011] As a preferred solution, the liquid outlet of the pump body is connected to the liquid inlet of the cooler via a second pipeline, a second flow control valve is provided on the second pipeline, and the second flow control valve is electrically connected to the control system.

[0012] As a preferred solution, the main engine cylinder liner preheating system includes a first temperature sensor, the first temperature sensor is arranged at the liquid inlet of the preheating chamber, and the first temperature sensor is electrically connected to the control system.

[0013] As a preferred solution, the main engine cylinder liner preheating system includes a second temperature sensor, the second temperature sensor is arranged at the liquid outlet of the preheating chamber, and the second temperature sensor is electrically connected to the control system.

[0014] As a preferred solution, the main engine cylinder liner preheating system includes a third temperature sensor, the third temperature sensor is arranged at the liquid outlet of the heat dissipation cavity, and the third temperature sensor is electrically connected to the control system.

[0015] As a preferred solution, the main engine cylinder liner preheating system includes a fourth temperature sensor, the fourth temperature sensor is arranged at the liquid inlet of the heat dissipation cavity, and the fourth temperature sensor is electrically connected to the control system.

[0016] As a preferred solution, the power of the cooler is adjustable, and the cooler is electrically connected to the control system.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The ship main engine cylinder liner preheating system of the present invention comprises a generator set and a generator set cooling system, the generator set has a heat dissipation chamber, the generator set cooling system has a cooler for cooling the heat exchange fluid flowing out of the heat dissipation chamber, the liquid outlet of the heat dissipation chamber, the liquid inlet of the preheating chamber, the liquid outlet of the preheating chamber, the liquid inlet of the cooler, the liquid outlet of the cooler and the liquid inlet of the heat dissipation chamber are connected in sequence, the heat exchange fluid flowing out of the heat dissipation chamber flows into the preheating chamber to achieve preheating of the engine cylinder liner, the temperature of the heat exchange fluid flowing out of the preheating chamber is reduced, the heat exchange fluid with reduced temperature flows into the cooler for further cooling, and then flows into the heat dissipation chamber to cool the generator set again. In the ship main engine cylinder liner preheating system of the present invention, the main engine cylinder liner utilizes the heat absorbed by the heat exchange fluid from the generator set, and the main engine cylinder liner achieves preliminary cooling of the heat exchange fluid, so that the operating power of the cooler is reduced. Therefore, the ship main engine cylinder liner preheating system of the present invention does not need to set up an additional preheating device to preheat the main engine cylinder liner, and effectively utilizes the heat generated when the generator set is running to preheat the main engine cylinder liner, thereby reducing the energy consumption of the main engine cylinder liner preheating system, and reducing the operating power of the cooler, thereby reducing the energy consumption of the generator set cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the cylinder liner preheating system of the main engine of a ship according to the present invention;

[0020] In the figure, 1, generator set, 2, main engine cylinder liner, 3, cooler, 4, pump body, 51, first pipeline, 52, second pipeline, 61, first flow regulating valve, 62, second flow regulating valve, 71, first temperature sensor, 72, second temperature sensor, 73, third temperature sensor, 74, fourth temperature sensor. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0023] The ship main engine cylinder liner preheating system of the present invention is used to pass preheating liquid into the preheating chamber of the main engine cylinder liner 2, such as Figure 1 As shown, a preferred embodiment of the ship main engine cylinder liner preheating system of the present invention comprises a generator set 1 and a cooling system of the generator set 1, the generator set 1 having a heat dissipation cavity, the cooling system of the generator set 1 having a cooler 3 for cooling the heat exchange fluid flowing out of the heat dissipation cavity, the liquid outlet of the heat dissipation cavity, the liquid inlet of the preheating cavity, the liquid outlet of the preheating cavity, the liquid inlet of the cooler 3, the liquid outlet of the cooler 3 and the liquid inlet of the heat dissipation cavity are sequentially connected.

[0024] Specifically, the heat exchange fluid flowing out of the heat dissipation chamber flows into the preheating chamber to achieve preheating of the engine cylinder liner. The temperature of the heat exchange fluid flowing out of the preheating chamber decreases, and the heat exchange fluid with reduced temperature flows into the cooler 3 for further cooling, and then flows into the heat dissipation chamber to cool the generator set 1 again. In the ship main engine cylinder liner preheating system of the present invention, the main engine cylinder liner 2 utilizes the heat absorbed by the heat exchange fluid from the generator set 1, and the main engine cylinder liner 2 achieves preliminary cooling of the heat exchange fluid, so that the operating power of the cooler 3 is reduced. Therefore, the ship main engine cylinder liner preheating system of the present invention does not need to set up an additional preheating device to preheat the main engine cylinder liner 2, and effectively utilizes the heat generated when the generator set 1 is running to preheat the main engine cylinder liner 2, reducing the energy consumption of the main engine cylinder liner preheating system, and reducing the operating power of the cooler 3, reducing the energy consumption of the cooling system of the generator set 1.

[0025] Among them, the cooling system of the generator set 1 includes a pump body 4, the liquid inlet of the pump body 4 is connected to the liquid outlet of the heat dissipation chamber, the liquid outlet of the pump body 4 is connected to the liquid inlet of the preheating chamber and the liquid inlet of the cooler 3, the pump body 4 provides power for the circulation of the heat exchange liquid, and a part of the heat exchange liquid flowing out of the pump body 4 enters the preheating chamber to preheat the main engine cylinder liner 2, and the other part directly flows into the cooler 3, which not only ensures the preheating requirements of the main engine cylinder liner 2, but also ensures the heat dissipation efficiency of the generator set 1.

[0026] In order to facilitate the adjustment of the ratio between the heat exchange liquid entering the preheating chamber and the heat exchange liquid directly entering the cooler 3, in this embodiment, the liquid outlet of the pump body 4 is connected to the liquid inlet of the preheating chamber through the first pipe 51, and the first pipe 51 is provided with a first flow regulating valve 61. The ship main engine cylinder liner preheating system also includes a control system, and the first flow regulating valve 61 is electrically connected to the control system. The control system controls the first flow regulating valve 61 to increase or decrease, which can increase or decrease the flow of the heat exchange liquid entering the preheating chamber. In other embodiments of the present invention, the pump body 4 can be set to two, one pump body 4 is arranged in the middle of the first pipe 51, and the other pump body 4 is arranged in the middle of the second pipe 52.

[0027] Furthermore, in this embodiment, the pump body 4 is a variable frequency pump, and the pump body 4 is electrically connected to the control system. The control system controls the pump body 4 to increase the power, which can increase the flow rate of the heat exchange liquid and control the flow rate within an appropriate range to avoid insufficient heat exchange between the heat dissipation chamber and the preheating chamber due to too fast a flow rate, and to avoid too slow heat dissipation of the heat dissipation chamber and too slow preheating of the preheating chamber due to too slow a flow rate.

[0028] In order to precisely control the flow of the heat exchange liquid flowing into the cooler 3, in this embodiment, the liquid outlet of the pump body 4 is connected to the liquid inlet of the cooler 3 through a second pipe 52, and a second flow control valve is provided on the second pipe 52, and the second flow control valve is electrically connected to the control system. Specifically, when the preheating of the preheating chamber is insufficient and the heat dissipation of the heat dissipation chamber is sufficient, the control system controls the opening of the first flow regulating valve 61 to increase and the opening of the second flow control valve to decrease; when the preheating of the preheating chamber is sufficient and the heat dissipation of the heat dissipation chamber is insufficient, the control system controls the opening of the first flow regulating valve 61 to decrease and the opening of the second flow control valve to increase; when the preheating of the preheating chamber and the heat dissipation of the heat dissipation chamber are both insufficient, the control system controls the power of the pump body 4 to increase.

[0029] In order to monitor whether the preheating chamber is sufficiently preheated, in this embodiment, the main engine cylinder liner preheating system includes a first temperature sensor 71, which is arranged at the liquid inlet of the preheating chamber and is electrically connected to the control system. The temperature of the heat exchange fluid flowing into the preheating chamber can be known through the first temperature sensor 71. By comparing the above temperature with the set preheating temperature of the engine cylinder liner, the temperature of the heat exchange fluid flowing into the preheating chamber can meet the preheating requirements of the preheating chamber. When the test value of the first temperature sensor 71 is lower than the set preheating temperature of the engine cylinder liner, the control system is used to reduce the operating power of the pump body 4 to increase the heat absorption time of the heat exchange fluid in the heat dissipation chamber.

[0030] Furthermore, in order to monitor the heat exchange effect between the heat exchange fluid and the main engine cylinder liner 2, in this embodiment, the main engine cylinder liner preheating system includes a second temperature sensor 72, which is arranged at the liquid outlet of the preheating chamber, and the second temperature sensor 72 is electrically connected to the control system. Specifically, by comparing the difference between the test values ​​of the temperature sensor and the second temperature sensor 72, the heat exchange effect between the heat exchange fluid and the main engine cylinder liner 2 can be obtained. If the difference is small, it means that the heat exchange effect is poor, and the preheating chamber needs to be cleaned and maintained. If the difference is large, it means that the heat exchange effect is good.

[0031] In this embodiment, the main engine cylinder liner preheating system includes a third temperature sensor 73, which is arranged at the liquid outlet of the heat dissipation chamber and is electrically connected to the control system. The temperature of the heat exchange liquid measured by the third temperature sensor 73 is the temperature of the mixed liquid after the heat exchange liquid flowing out of the preheating chamber and the heat exchange liquid directly flowing out of the heat dissipation chamber are mixed. The temperature of the heat exchange liquid flowing into the cooler 3 can be known through the third temperature sensor 73, which is convenient for controlling the operating parameters of the cooler 3.

[0032] Furthermore, in order to facilitate monitoring of the temperature of the heat exchange fluid flowing out of the cooler 3, in this embodiment, the main engine cylinder liner preheating system includes a fourth temperature sensor 74, which is arranged at the liquid inlet of the heat dissipation cavity and is electrically connected to the control system.

[0033] In this embodiment, the power of the cooler 3 is adjustable, and the cooler 3 is electrically connected to the control system. When the value of the fourth temperature is higher than the target temperature, the control system controls the cooler 3 to increase the power, and when the value of the fourth temperature is lower than the target temperature, the control system controls the cooler 3 to decrease the power.

[0034] In summary, the ship main engine cylinder liner preheating system of the present invention comprises a generator set 1 and a cooling system of the generator set 1, the generator set 1 having a heat dissipation chamber, the cooling system of the generator set 1 having a cooler 3 for cooling the heat exchange fluid flowing out of the heat dissipation chamber, the liquid outlet of the heat dissipation chamber, the liquid inlet of the preheating chamber, the liquid outlet of the preheating chamber, the liquid inlet of the cooler 3, the liquid outlet of the cooler 3 and the liquid inlet of the heat dissipation chamber are sequentially connected, the heat exchange fluid flowing out of the heat dissipation chamber flows into the preheating chamber to achieve preheating of the engine cylinder liner, the temperature of the heat exchange fluid flowing out of the preheating chamber is reduced, the heat exchange fluid with reduced temperature flows into the cooler 3 for further cooling and then flows into the heat dissipation chamber to cool the generator set 1 again. In the ship main engine cylinder liner preheating system of the present invention, the main engine cylinder liner 2 utilizes the heat absorbed by the heat exchange fluid from the generator set 1, and the main engine cylinder liner 2 achieves preliminary cooling of the heat exchange fluid, so that the operating power of the cooler 3 is reduced. Therefore, the ship main engine cylinder liner preheating system of the present invention does not need to set up an additional preheating device to preheat the main engine cylinder liner 2, and effectively utilizes the heat generated when the generator set 1 is running to preheat the main engine cylinder liner 2, thereby reducing the energy consumption of the main engine cylinder liner preheating system, and reducing the operating power of the cooler 3, thereby reducing the energy consumption of the cooling system of the generator set 1.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A ship main engine cylinder liner preheating system, used for introducing preheating liquid into the preheating chamber of the main engine cylinder liner (2), characterized in that: The main engine cylinder liner preheating system comprises a generator set (1) and a generator set (1) cooling system, the generator set (1) having a heat dissipation chamber, the generator set (1) cooling system having a cooler (3) for cooling heat exchange fluid flowing out of the heat dissipation chamber, the liquid outlet of the heat dissipation chamber, the liquid inlet of the preheating chamber, the liquid outlet of the preheating chamber, the liquid inlet of the cooler (3), the liquid outlet of the cooler (3) and the liquid inlet of the heat dissipation chamber are sequentially connected.

2. The ship main engine cylinder liner preheating system according to claim 1 is characterized in that: The cooling system of the generator set (1) comprises a pump body (4), the liquid inlet of the pump body (4) being connected to the liquid outlet of the heat dissipation chamber, and the liquid outlet of the pump body (4) being connected to the liquid inlet of the preheating chamber and the liquid inlet of the cooler (3).

3. The ship main engine cylinder liner preheating system according to claim 2 is characterized in that: The liquid outlet of the pump body (4) is connected to the liquid inlet of the preheating chamber through a first pipeline (51), and a first flow regulating valve (61) is provided in the first pipeline (51); The ship main engine cylinder liner preheating system also includes a control system, and the first flow regulating valve (61) is electrically connected to the control system.

4. The ship main engine cylinder liner preheating system according to claim 3 is characterized in that: The pump body (4) is a variable frequency pump, and the pump body (4) is electrically connected to the control system.

5. The ship main engine cylinder liner preheating system according to claim 4, characterized in that: The liquid outlet of the pump body (4) is connected to the liquid inlet of the cooler (3) via a second pipe (52), a second flow control valve is provided on the second pipe (52), and the second flow control valve is electrically connected to the control system.

6. The ship main engine cylinder liner preheating system according to claim 3, characterized in that: The main engine cylinder liner preheating system comprises a first temperature sensor (71), wherein the first temperature sensor (71) is arranged at the liquid inlet of the preheating chamber, and the first temperature sensor (71) is electrically connected to the control system.

7. The ship main engine cylinder liner preheating system according to claim 3, characterized in that: The main engine cylinder liner preheating system comprises a second temperature sensor (72), the second temperature sensor (72) is arranged at the liquid outlet of the preheating chamber, and the second temperature sensor (72) is electrically connected to the control system.

8. The ship main engine cylinder liner preheating system according to claim 3, characterized in that: The main engine cylinder liner preheating system comprises a third temperature sensor (73), the third temperature sensor (73) is arranged at the liquid outlet of the heat dissipation cavity, and the third temperature sensor (73) is electrically connected to the control system.

9. The ship main engine cylinder liner preheating system according to claim 3, characterized in that: The main engine cylinder liner preheating system comprises a fourth temperature sensor (74), the fourth temperature sensor (74) is arranged at the liquid inlet of the heat dissipation cavity, and the fourth temperature sensor (74) is electrically connected to the control system.

10. The ship main engine cylinder liner preheating system according to claim 3, characterized in that: The power of the cooler (3) is adjustable, and the cooler (3) is electrically connected to the control system.

Images