Diesel engine cooling system of diesel locomotive

Abstract

The utility model relates to a diesel engine cooling system of a diesel locomotive, which is characterized in that a first temperature sensor and a first water pressure sensor are arranged at a high-temperature water outlet of a diesel engine, a second temperature sensor is arranged at a water outlet of a high-temperature radiating single section, and the high-temperature radiating single section is connected with a first water pump; an intercooling water outlet of the diesel engine is provided with a third temperature sensor and a second water pressure sensor, the intercooling heat dissipation single section is provided with a fourth temperature sensor, and the intercooling heat dissipation single section is connected with a second water pump; the high-temperature heat dissipation single section and the inter-cooling heat dissipation single section are further provided with hydraulic fans respectively, the hydraulic fans are provided with electric control proportional overflow valves, the electric control proportional overflow valves are connected with a control module, and the control module is connected with the first water pump and the second water pump. High-temperature cooling water and intermediate cooling water are monitored through the temperature sensor and the water pressure sensor respectively, the response speed of the system is higher through intelligent control over the rotating speed of the hydraulic fan and automatic opening and closing of the shutters, man-machine interaction is facilitated, and manual control can be achieved under special conditions.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine control technology, specifically to a diesel engine cooling system for internal combustion locomotives. Background Technology

[0002] The DF10D and DF4DD diesel locomotives rely on a hydrostatic system for high-temperature and intercooling cooling. This system works by having the diesel engine crankshaft drive the hydrostatic gearbox via a drive shaft, pressurizing the hydraulic oil into the system's piping. A temperature control valve then controls the speed of the hydrostatic fan. The continuously variable speed control of the cooling fan is achieved primarily through the thermal expansion and contraction of the temperature-sensing element in the temperature control valve and the combined effect of spring force. However, the temperature control valve has a certain degree of lag, especially in hot summer weather. Often, a high-temperature alarm will sound before the valve's adjusting screw is fully engaged. Furthermore, the rubber seals of the temperature-sensing element are constantly immersed in high-temperature oil, leading to corrosion, aging, and potential malfunction. This causes significant inconvenience for routine locomotive maintenance.

[0003] Therefore, there is an urgent need for an electronically controlled cooling system for internal combustion locomotives that can be electrically and manually controlled, is highly sensitive, and is easy to operate. Summary of the Invention

[0004] This invention addresses the issues of lag and inconvenience in the hydrostatic control of DF10D and DF4DD locomotives by proposing a diesel engine cooling system for internal combustion locomotives. The system monitors high-temperature and medium-temperature cooling water using temperature and water pressure sensors, respectively. Intelligent control of the hydraulic fan speed and automatic opening and closing of the louvers enable faster system response, facilitate human-machine interaction, and allow for manual control in special circumstances.

[0005] To achieve the above objectives, this utility model proposes a diesel engine cooling system for internal combustion locomotives, including a diesel engine and louvers. The diesel engine is equipped with a high-temperature heat dissipation unit, and an intercooler heat dissipation unit is installed at the oil outlet of the diesel engine. The high-temperature heat dissipation unit is used to dissipate heat from the cylinders of the diesel engine, and the intercooler heat dissipation unit is used to dissipate heat from the engine oil of the diesel engine. The louvers are used for heat dissipation. The high-temperature water outlet of the diesel engine is connected to the high-temperature heat dissipation unit. The high-temperature water outlet of the diesel engine is equipped with a first temperature sensor and a first water pressure sensor. The water outlet of the high-temperature heat dissipation unit is equipped with a second temperature sensor, and the high-temperature heat dissipation unit is connected to a first water pump.

[0006] The intercooler outlet of the diesel engine is connected to the intercooler heat dissipation unit. The intercooler outlet of the diesel engine is equipped with a third temperature sensor and a second water pressure sensor. The intercooler heat dissipation unit is equipped with a fourth temperature sensor and is connected to a second water pump.

[0007] The high-temperature heat dissipation unit and the intercooling heat dissipation unit are also equipped with hydraulic fans. The hydraulic fans are equipped with electronically controlled proportional relief valves. The hydraulic fans are connected to hydraulic oil tanks through the electronically controlled proportional relief valves. The coil of the electronically controlled proportional relief valves is connected to a control module. The input terminals of the control module are respectively connected to a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a first water pressure sensor, and a first water pressure sensor.

[0008] The output of the control module is electrically connected to the first and second water pumps.

[0009] Furthermore, the control module includes a PLC controller, two frequency converters, an HIM module, and buttons. The input terminal of the PLC controller is connected to the buttons, the PLC controller and the HIM module are communicatively connected, the PLC controller and the frequency converters are communicatively connected, and the two frequency converters are correspondingly connected to the first water pump and the second water pump.

[0010] A PLC control system is used to control the water pump, louvers, and hydraulic fan. The PLC control system offers fast response and multiple control modes, providing the hardware foundation for intelligent cooling control. The HIM module communicates with the PLC control system to enable human-machine interaction. Operators can use the HIM module to set PLC controller parameters and configure buttons. These buttons connect to the PLC controller for manual control.

[0011] Furthermore, the buttons include a summer switching button, a medium-cooling forced button, a high-temperature forced button, a medium-cooling louver button, and a high-temperature louver button.

[0012] Furthermore, the control module is equipped with a control box, which is a square structure with a hollow interior and an open side. A door is hinged to the open side of the control box, and a viewing window is opened on the door corresponding to the HIM module.

[0013] The button is fixedly installed on the outside of the box door.

[0014] A control box is installed to protect the electrical equipment.

[0015] Furthermore, the louvers include high-temperature louvers and medium-cooling louvers. Both the high-temperature louvers and the medium-cooling louvers are equipped with louver controllers. The louver controllers are electrically connected to a PLC controller. A diode is provided between the PLC controller and the louver controller. The positive terminal of the diode is connected to the output terminal of the PLC controller, and the negative terminal is connected to the input terminal of the louver controller.

[0016] The beneficial effects of this utility model through the above technical solution are as follows:

[0017] This utility model realizes the electrical control of a cooling system, with separate control of the high-temperature heat dissipation unit and the intercooling heat dissipation unit. The water temperature of the cooling system is detected by first to fourth temperature sensors. The control module uses the water temperature parameters to control the electronically controlled proportional relief valve to adjust the speed of the hydraulic fan, thereby improving the cooling effect. Furthermore, by controlling the opening of the high-temperature louvers and the intercooling louvers, the cooling effect is further improved, solving the problem of control lag in existing cooling systems.

[0018] 2. This utility model is equipped with a control module, which includes buttons. Manual control is achieved through the buttons, and the buttons directly issue control commands to the PLC controller, thereby improving the operational flexibility of the cooling system and thus improving the efficiency of the cooling system. Attached Figure Description

[0019] Figure 1 This is a circuit diagram of a diesel engine cooling system for an internal combustion locomotive according to the present invention;

[0020] Figure 2 This is a structural diagram of the control box of a diesel engine cooling system for an internal combustion locomotive according to the present invention.

[0021] Reference numerals: 3 is the first temperature sensor, 4 is the first water pump, 5 is the second temperature sensor, 6 is the first water pressure sensor, 7 is the third temperature sensor, 8 is the second water pump, 9 is the fourth temperature sensor, 10 is the second water pressure sensor, 11 is the hydraulic fan, 12 is the electrically controlled proportional relief valve, 13 is the PLC controller, 14 is the frequency converter, 15 is the HIM module, 16 is the control box, 17 is the louver controller, and 18 is the diode. Detailed Implementation

[0022] Example 1

[0023] like Figures 1-2 As shown, a diesel engine cooling system for an internal combustion locomotive includes a diesel engine and louvers. The diesel engine is equipped with a high-temperature heat dissipation unit, and an intercooler heat dissipation unit is installed at the oil outlet of the diesel engine. The high-temperature heat dissipation unit is used to dissipate heat from the cylinders of the diesel engine, and the intercooler heat dissipation unit is used to dissipate heat from the engine oil of the diesel engine. The louvers are used for heat dissipation. The high-temperature water outlet of the diesel engine is connected to the high-temperature heat dissipation unit. The high-temperature water outlet of the diesel engine is equipped with a first temperature sensor 3 and a first water pressure sensor 6. The water outlet of the high-temperature heat dissipation unit is equipped with a second temperature sensor 5. The high-temperature heat dissipation unit is connected to a first water pump 4.

[0024] The intercooler outlet of the diesel engine is connected to the intercooler heat dissipation unit. The intercooler outlet of the diesel engine is equipped with a third temperature sensor 7 and a second water pressure sensor 10. The intercooler heat dissipation unit is equipped with a fourth temperature sensor 9 and is connected to a second water pump 8.

[0025] The high-temperature heat dissipation unit and the intercooling heat dissipation unit are also equipped with hydraulic fans 11. The hydraulic fans 11 are equipped with electronically controlled proportional relief valves 12. The hydraulic fans 11 are connected to hydraulic oil tanks through the electronically controlled proportional relief valves 12. The coil of the electronically controlled proportional relief valves 12 is connected to a control module. The input terminals of the control module are respectively connected to the first temperature sensor 3, the second temperature sensor 5, the third temperature sensor 7, the fourth temperature sensor 9, the first water pressure sensor 6, and the first water pressure sensor 6.

[0026] The output of the control module is electrically connected to the first water pump 4 and the second water pump 8.

[0027] The control module includes a PLC controller 13, two frequency converters 14, an HIM module 15, and buttons. The input terminal of the PLC controller 13 is connected to the buttons. The PLC controller 13 and the HIM module 15 are communicatively connected. The PLC controller 13 and the frequency converters 14 are communicatively connected. The two frequency converters 14 are correspondingly connected to the first water pump 4 and the second water pump 8.

[0028] The buttons include a summer switching button, a medium-cooling forced button, a high-temperature forced button, a medium-cooling louver button, and a high-temperature louver button.

[0029] The control module is equipped with a control box 16, which is a square structure with a hollow interior and an open side. A door is hinged to the open side of the control box 16, and a viewing window is opened on the door corresponding to the HIM module 15.

[0030] The button is fixedly installed on the outside of the box door.

[0031] The louvers include high-temperature louvers and medium-cooling louvers. Both high-temperature and medium-cooling louvers are equipped with a louver controller 17. The louver controller 17 is electrically connected to a PLC controller 13. A diode 18 is positioned between the PLC controller 13 and the louver controller 17. The anode of the diode 18 is connected to the output terminal of the PLC controller 13, and the cathode is connected to the input terminal of the louver controller 17. In this embodiment, the diode 18 includes diode A and diode B, and the corresponding louver controller 17 includes louver controller A and louver controller B.

[0032] During operation, the high-temperature water outlet of the diesel engine and the intercooler water outlet in the cooling system work independently to dissipate heat.

[0033] In this embodiment, the hydraulic pipelines and hydraulic oil tank are components from the original cooling system. The high-temperature heat dissipation unit, the intercooling heat dissipation unit, the first water pump 4, the second water pump 8, the hydraulic fan 11, the high-temperature louvers, and the intercooling louvers are also components from the original cooling system. The diesel engine models of the DF10D and DF4DD locomotives are fixed. The high-temperature heat dissipation equipment and the intercooling heat dissipation equipment are existing technologies. The connection relationship of the above components is determined and will not be described in detail here.

[0034] When the high-temperature heat dissipation unit is used for heat dissipation, the first temperature sensor 3 and the second temperature sensor 5 detect the water temperature on both sides of the high-temperature heat dissipation unit. In order to facilitate control, upper and lower temperature thresholds are set in the PLC controller 13. When the temperature value detected by the first temperature sensor 3 is greater than the upper temperature threshold, the PLC controller 13 controls the coil of the electronically controlled proportional relief valve 12 to be energized, thereby connecting the hydraulic fan 11 of the high-temperature heat dissipation unit to the hydraulic oil tank. The PLC controller 13 adjusts the oil pressure of the hydraulic pipeline through the electronically controlled proportional relief valve 12, thereby changing the speed of the hydraulic fan 11. The first water pressure sensor 6 detects the water pressure at the first water pump 4. At the same time, the PLC controller 13 turns on the diode 18A and sends a start signal to the louver controller 17A. The louver controller 17A controls the high-temperature louvers to open.

[0035] When the temperature drops below the lower limit threshold, the PLC controller 13 controls the proportional overflow valve 12 to reset, the PLC controller 13 turns off the diode 18A, the start signal of the louver controller 17A disappears, and the high-temperature louver is reset.

[0036] The working principle of the intercooling heat dissipation unit is the same as that of the high-temperature heat dissipation unit, and will not be repeated below. The PLC controller 13 is also set with upper and lower thresholds for the intercooling unit. The water temperature on both sides of the intercooling heat dissipation unit is detected by the third temperature sensor 7 and the fourth temperature sensor 9. The second water pressure sensor 10 detects the water pressure at the second water pump 8. The PLC controller 13 controls the speed of the hydraulic fan 11 of the intercooling heat dissipation unit through the electronically controlled proportional overflow valve 12, and controls the opening of the intercooling louvers through the diode 18B to achieve the heat dissipation effect of the intercooling heat dissipation unit. When the temperature is lower than the lower lower threshold, the PLC controller 13 controls the intercooling heat dissipation unit to reset.

[0037] Example 2

[0038] In manual mode, operators control the operation of the high-temperature and intercooling heat dissipation units using the summer switch button, intercooling forced button, high-temperature forced button, intercooling louver button, and high-temperature louver button. Below these buttons are nameplates corresponding to their functions.

[0039] Because the weather is hotter in summer, the temperature rises faster and the heat dissipation requirements are different from those in the other three seasons. Pressing the summer conversion button will lower the upper limit threshold of PLC controller 13 by 5~10℃.

[0040] The intercooling forced button and the high-temperature forced button operate on the same principle; only the intercooling forced button will be explained below. When the intercooling forced button is pressed, the PLC controller 13, through the electronically controlled proportional relief valve 12, directly causes the hydraulic fan 11 to reach its maximum speed for cooling. Simultaneously, the PLC controller 13 turns on diode 18B, and the louver controller 17B, upon receiving the start signal, controls the intercooling louvers to open. Both the intercooling forced button and the high-temperature forced button are suitable for operational scenarios requiring rapid cooling.

[0041] Because the train has high power output when climbing long and steep slopes, the diesel engine temperature rises rapidly. Therefore, the louvers need to be opened before climbing. Pressing the intercooling louver button and the high-temperature louver button activates diodes 18A and 18B in PLC controller 13, thereby opening the high-temperature louver and the intercooling louver respectively via louver controllers 17A and 17B.

[0042] Staff can use the HIM module 15 to view the current digital values ​​of the first temperature sensor 3, the second temperature sensor 5, the third temperature sensor 7, the fourth temperature sensor 9, the first water pressure sensor 6, and the second water pressure sensor 8 at any time, in order to understand the working status of the cooling system.

[0043] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. An internal combustion engine cooling system for a locomotive, comprising a diesel engine and louvers, the diesel engine being provided with a high-temperature heat radiating unit and an intermediate-temperature heat radiating unit, the high-temperature heat radiating unit being used to radiate heat from a cylinder of the diesel engine, the intermediate-temperature heat radiating unit being used to radiate heat from oil of the diesel engine, the louvers being used for heat radiation, characterized in that, The high-temperature outlet of the diesel engine is connected with a high-temperature heat dissipation unit, the high-temperature outlet of the diesel engine is provided with a first temperature sensor (3) and a first water pressure sensor (6), the outlet of the high-temperature heat dissipation unit is provided with a second temperature sensor (5), and the high-temperature heat dissipation unit is connected with a first water pump (4); The medium-temperature outlet of the diesel engine is connected with a medium-temperature heat dissipation unit, the medium-temperature outlet of the diesel engine is provided with a third temperature sensor (7) and a second water pressure sensor (10), the medium-temperature heat dissipation unit is provided with a fourth temperature sensor (9), and the medium-temperature heat dissipation unit is connected with a second water pump (8); The high-temperature heat dissipation unit and the medium-temperature heat dissipation unit are further provided with hydraulic fans (11), the hydraulic fans (11) are provided with electric control proportional overflow valves (12), the hydraulic fans (11) are connected with a hydraulic oil tank through the electric control proportional overflow valves (12), the coils of the electric control proportional overflow valves (12) are connected with a control module, and the input ends of the control module are connected with the first temperature sensor (3), the second temperature sensor (5), the third temperature sensor (7), the fourth temperature sensor (9), the first water pressure sensor (6) and the first water pressure sensor (6). The output end of the control module is electrically connected with the first water pump (4) and the second water pump (8).

2. An internal combustion engine cooling system for a locomotive as set forth in claim 1 wherein, The control module comprises a PLC controller (13), two frequency converters (14), a HIM module (15) and a key, the input end of the PLC controller (13) is connected with the key, the PLC controller (13) and the HIM module (15) are in communication connection, the PLC controller (13) is in communication connection with the frequency converters (14), and the two frequency converters (14) are correspondingly connected with the first water pump (4) and the second water pump (8).

3. An internal combustion engine cooling system for a locomotive as set forth in claim 2 wherein, The key comprises a summer conversion key, a medium-temperature forced key, a high-temperature forced key, a medium-temperature louver key and a high-temperature louver key.

4. An internal combustion engine cooling system as claimed in claim 3, wherein The control module is provided with a control box (16), the control box (16) is a square structure with an internal cavity and an open side, a box door is hinged to the open side of the control box (16), and a window is formed in the box door and corresponds to the HIM module (15); The key is fixedly arranged outside the box door.

5. An internal combustion engine cooling system as claimed in claim 2, wherein The louver comprises a high-temperature louver and a medium-temperature louver, the high-temperature louver and the medium-temperature louver are provided with a louver controller (17), the louver controller (17) and the PLC controller (13) are electrically connected, a diode (18) is arranged between the PLC controller (13) and the louver controller (17), the positive electrode of the diode (18) is connected with the output end of the PLC controller (13), and the negative electrode is connected with the input end of the louver controller (17).

Images