TWI570022B - Ship host cylinder water cooling system - Google Patents

Description

Ship main engine cylinder water cooling system

The invention relates to a cooling system, in particular to a water cooling system for a ship's main engine liner.

According to the ship's main engine cylinder water cooling system, it is one of the central cooling systems. Its function is to make the heat generated by the ship's main engine running through the cooling liquid of the ship's main cylinder liner water cooling system, and then pass through After the first stage of heat recovery and cooling, the water machine of the main engine cylinder water cooling system of the ship performs heat exchange with the heat exchange part of the fresh water side cooling system of the ship, and then returns to the preheating of the water cooling system of the ship's main cylinder liner. Thermal system.

At present, the water cooling system of the main engine cylinder liner of the ship is to maintain the temperature of the main engine of the ship in the running state or in the shutdown state, mainly by using a three-way valve to cooperate with the pump with full flow output, and the control of the three-way valve Mainly detecting the outlet temperature of the three-way valve through a temperature sensor, and when the outlet temperature exceeds the set value, controlling the outlet valve of the three-way valve to increase the opening degree, and the bypass valve of the three-way valve Then, the opening degree is reduced, thereby increasing the flow rate of the cooling liquid flowing into the main engine of the ship; conversely, reducing the opening degree of the outlet valve and simultaneously increasing the opening degree of the bypass valve, thereby increasing the backflow to avoid the cooling liquid. The temperature is too low.

Since the ship's main engine is in the running state or in the shutdown state, it must maintain a certain warm-up or waiting temperature to avoid low-temperature corrosion or the expansion coefficient due to different expansion coefficients. other problems. In general, the shipyard or ship driver avoids trouble, or has long been operating habits of the ship's main cylinder liner water cooling system, so whether the ship's navigation mode is navigation, entry and exit, porting, etc., the ship's main engine liner water The pump of the cooling system provides the maximum rated flow of cooling liquid to avoid this.

However, when the ship is in various driving states, the ship's main engine does not need such a large amount of cooling liquid flow, especially when the ship is parked at the port, the maximum rated flow of the cooling liquid provided by the ship's main tank water cooling system. It will far exceed the amount required by the ship's main engine, causing unnecessary energy loss. Accordingly, the creators of the present invention believe that this is necessary for improvement.

In view of the deficiencies described in the prior art, the creator of the present invention proposes a solution for a ship's main engine liner water cooling system, comprising:

A loop tube:

One section of the circulation pipe spans a bypass pipe, and the circulation pipe defines a first section and a second section; the first section is available for heat exchange with a heat exchange part of a freshwater side cooling system of the vessel Exchanging; the second end portion is provided with a preheating system, a first temperature detector, a ship main engine, a turbocharger, a second temperature detector, and a water generating body from one end toward the other end. The first temperature detector and the second temperature detector are configured to detect a temperature when the cooling liquid in the circulation pipe passes, and obtain a first temperature detection value and a second temperature detection value. .

A frequency conversion pump:

The inverter pump is disposed in the second section, and the outlet section of the inverter pump faces the other end of the second section.

A control unit:

The control unit is electrically connected to the preheating system, the ship host, the turbocharger, the first temperature detector, the second temperature detector, and the water generator, and the control unit writes a The inverter pump control program is executable by the control unit: determining the current state of the ship according to the preheating system, the host of the ship, and the opening and closing state of the turbocharger, when judging that the ship is in When entering or leaving the port state, the inverter pump is controlled to operate at a maximum running speed; if it is determined that the ship is in a navigation state, the operating speed of the inverter pump is controlled until the first temperature detection value and the second temperature The detected values respectively satisfy a first temperature preset value and a second temperature preset value; if it is determined that the ship is in a stationary state, the operating speed of the frequency conversion pump is controlled until the first temperature detection value is satisfied. The first temperature preset value.

Since the ship is in various states (shipping state, inbound and outbound state, and stationary state), the suitable working environment temperature of each component is different, and when the ship is in various states, the opening and closing relationship between the components is not the same. Accordingly, the creator of the present invention proposes a means for solving the deficiencies of the prior art, which mainly uses the control unit to know the current state of the ship system according to the opening and closing relationship of each component, and then according to the state, the components are compared. Depending on the temperature of the working environment, the flow rate of the output cooling liquid of the frequency conversion pump is adjusted, so that the frequency conversion pump does not need to be in a high-speed operation state for a long time, thereby saving energy use and solving the problems described in the prior art. Where.

(A) ‧‧‧Ship main cylinder liner water cooling system

(B) ‧‧‧ship freshwater side cooling system

(B1)‧‧‧Hot Exchange Department

(1) ‧‧‧Circulation tube

(11) ‧‧‧First Section

(12)‧‧‧The second paragraph

(13) ‧ ‧ bypass pipe

(2) ‧‧‧Preheating system

(3) ‧‧‧First temperature detector

(4) ‧‧‧Ship mainframe

(5) ‧‧‧ turbocharger

(6) ‧‧‧Second temperature detector

(7)‧‧‧Water machine

(8)‧‧‧Frequency pump

(9) ‧‧‧Control unit

The first figure is a schematic diagram of the connection of each component of the invention.

The construction, features and embodiments of the present invention will be described with the aid of the drawings, and the reviewers will have a better understanding of the present invention.

Referring to the first figure, the invention relates to a water cooling system for a ship's main engine liner, comprising:

A circulation tube (1):

Referring to the first figure, one section of the circulation pipe (1) spans a bypass pipe (13), and the circulation pipe (1) defines a first section (11) and a second section. a portion (11); the first segment (11) is heat exchangeable with a heat exchange portion (B1) of a ship fresh water side cooling system (B); and the second segment portion (12) is from one end toward the other end a preheating system (2), a first temperature detector (3), a ship host (4), a turbocharger (5), a second temperature detector (6), and A water machine (7). The first temperature detector (3) is configured to detect a temperature of the cooling liquid flowing through the preheating system (2) to obtain a first temperature detection value; the second temperature detector (6) is For detecting the temperature of the cooling liquid flowing through the turbocharger (5), a second temperature detection value is obtained.

A frequency conversion pump (8):

Referring to the first figure, the inverter pump (8) is disposed in the second section (12), and the outlet section of the inverter pump (8) faces the other end of the second section (12). .

A control unit (9):

Referring to the first figure, the control unit (9) is electrically connected to the preheating system (2), the first temperature detector (3), the ship host (4), and the turbocharger. (5), the second temperature detector (6), and the water generator (7), the control unit (9) Write a variable frequency pump control program.

The following is a description of the characteristics of the ship in various states:

1. When the ship is in the state of entry and exit, only the water generator (7) is in a stopped state, and the preheating system (2), the ship main engine (4), and the turbocharger (5) are at When the ship's main engine (4) is frequently operated, the overall thermal load of the ship's main engine casing water system (A) changes drastically. At this time, the inverter pump (8) is required to output maximum cooling. The liquid flow is able to cope with this heat load change.

2. When the ship is in the shutdown state, only the preheating system (2) is in an open state, and the ship main engine (4), the turbocharger (5), and the water generator (7) are In the off state, at the same time, the operation of the frequency conversion pump (8) only needs to maintain the temperature required by the host (4) of the ship in the warm state.

3. When the ship is in a sailing state, the preheating system (2) is in a closed state, and the ship main engine (4) and the turbocharger (5) are in a starting state, at this time, The operation of the frequency conversion pump (8) only needs to maintain the suitable temperature of each component under the operating state.

Accordingly, the creator of the present invention has the above-described characteristics when navigating through a ship, and it is considered that the use of the above-described characteristics to control the operation of the variable frequency pump (8) can improve the water cooling system of the marine liner of the ship described in the prior art. The inverter pump continues to be at a loss of energy due to the output of the maximum cooling liquid flow. Therefore, the inverter pump control program is executable by the control unit (9): according to the preheating system (2), the ship host (4), and the turbocharger (5) opening and closing state, judging the current The state of the ship, when judging that the ship is in the inbound and outbound state, then controlling the inverter pump (8) to maximize the operation The rotation speed is actuated; if it is determined that the ship is in a navigation state, the operating speed of the frequency conversion pump (8) is controlled until the first temperature detection value and the second temperature detection value respectively satisfy a first temperature pre-predetermined Setting a value and a second temperature preset value; if it is determined that the ship is in a stationary state, controlling the operating speed of the frequency conversion pump (8) until the first temperature detection value satisfies the first temperature preset value . In addition, the first temperature preset value is preferably 55 (1±5%) ° C, and the second temperature preset value is preferably 80 (1±5%) ° C, so that each component can be in a suitable state. The ambient temperature operates.

In summary, the creation of the present invention is indeed in line with the industrial applicability, and is not found in the publication or public use before the application, nor is it known to the public, and has non-obvious knowledge, conforms to the patentable requirements, and is patented according to law. Application.

However, the above-mentioned statements are a preferred embodiment of the invention in the creation of the invention, and all the changes in the scope of the patent application according to the invention are within the scope of the claim.

(A) ‧‧‧Ship main cylinder liner water cooling system

(B) ‧‧‧ship freshwater side cooling system

(B1)‧‧‧Hot Exchange Department

(1) ‧‧‧Circulation tube

(11) ‧‧‧First Section

(12)‧‧‧The second paragraph

(13) ‧ ‧ bypass pipe

(2) ‧‧‧Preheating system

(3) ‧‧‧First temperature detector

(4) ‧‧‧Ship mainframe

(5) ‧‧‧ turbocharger

(6) ‧‧‧Second temperature detector

(7)‧‧‧Water machine

(8)‧‧‧Frequency pump

(9) ‧‧‧Control unit

Claims (1)

A water cooling system for a ship's main engine cylinder liner includes: a circulation pipe: a section spans a bypass pipe, the circulation pipe defines a first section and a second section; the first section is available for The heat exchange unit of the fresh water side cooling system of the ship performs heat exchange; the second section is provided with a preheating system, a first temperature detector, a ship main engine, a turbocharger, and a step from one end toward the other end. a second temperature detector and a water generator; the first temperature detector and the second temperature detector are configured to detect a temperature when the cooling liquid in the circulation tube passes, and obtain a first temperature detector Measured value and a second temperature detection value; a frequency conversion pump: disposed in the second section, and the outlet section of the frequency conversion pump is oriented toward the other end of the second section; a control unit: respectively Connecting the preheating system, the ship main engine, the turbocharger, and the water generator, the control unit writes a frequency conversion pump control program, and the frequency conversion pump control program is executable by the control unit: according to the pre Thermal system, the main engine of the ship, and the opening and closing of the turbocharger State, judging the current state of the ship, when judging that the ship is in the inbound and outbound state, controlling the frequency conversion pump to operate at the maximum operating speed; if it is determined that the ship is in a navigation state, controlling the operating speed of the frequency conversion pump, Until the first temperature detection value and the second temperature detection value respectively satisfy a first temperature preset value and a second temperature preset value; if it is determined that the ship is in a stationary state, the frequency conversion pump is controlled The operating speed is until the first temperature detection value satisfies the first temperature preset value, wherein the first temperature preset value is 55 (1±5%) ° C, and the second temperature preset value is 80 (1) ±5%) °C, where the preheating system is off When the ship main engine and the turbocharger are both in an open state, the ship is in a sailing state; when the preheating system is in an open state, and the ship main engine and the turbocharger are both in a closed state, then The ship is in a stationary state; when the ship main engine, the turbocharger, and the preheating system are both in an open state, the ship is in an inbound and outbound state.