A locomotive integrated ventilation cooling system and control method and locomotive

Abstract

The present application relates to a kind of locomotive integrated ventilation cooling system, comprising: side wall filter and variable flow water cooling radiator, which are respectively arranged on the outside and the inside of the opening of locomotive side wall;Ventilator, which is installed on the chassis of locomotive and connected sealingly with variable flow water cooling radiator through transition air duct, the air outlet of ventilator is connected sealingly with chassis air duct;Traction motor, the air inlet of which is connected with the air outlet of chassis air duct, and the air outlet of traction motor discharges cooled air to the outside air;Main generator motor, the air inlet of which is connected with the air outlet of chassis air duct, and the air outlet of main generator motor discharges cooled air to the outside air.The present application integrates variable flow system cooling, main generator motor cooling and traction motor cooling, realizes a ventilator to complete the ventilation cooling of multiple systems, saves the whole vehicle space, and reduces the weight of the whole vehicle.

Description

Technical Field

[0001] This invention belongs to the field of locomotive heat dissipation technology, and more specifically, relates to an integrated ventilation and cooling system and control method for locomotives, as well as a locomotive. Background Technology

[0002] The dual-source locomotive with integrated electric and diesel power sources is a type of locomotive that integrates both electric and diesel power sources. This locomotive can operate on electrified lines using electric traction to achieve network connectivity, and can also use the diesel engine for traction on non-electrified lines or in special circumstances such as overhead contact line failures. Particularly when operating in diesel mode, the main generator, traction motor, and converter system are all engaged, generating heat that must be managed by the locomotive's cooling system.

[0003] Chinese Patent Publication No. CN102361392A discloses a converter cooling system for internal combustion locomotives, belonging to the field of converter cooling systems. The independent air intake unit is located on top of the radiator, which is located on top of an independent air chamber. The traction motor fan is located within the independent air chamber. The air intake of the main generator is connected to the independent air chamber, which in turn is connected to the independent air intake unit. The radiator's outlet pipe is connected to the water pump's inlet, the water pump's outlet is connected to the converter's inlet pipe, the converter's outlet pipe is connected to the converter's outlet pipe, the converter's outlet pipe is connected to the radiator's inlet pipe, and the radiator's outlet pipe is connected to the radiator's outlet pipe. However, this patent partially integrates the converter cooling system with the traction motor ventilation cooling system, using separate fans for the main generator and traction motor, primarily to address the converter cooling issue.

[0004] Chinese patent publication number CN109617375A discloses a highly integrated cooling system for internal combustion locomotives, comprising a sealed air chamber installed on the roof, with an air inlet on its side wall. Inside the sealed air chamber, a filter device, a water pump, a radiator, a first ventilation unit, and a second ventilation unit are arranged sequentially. The filter device is located at the air inlet. The water pump outlet is connected to the converter system inlet, the converter system outlet is connected to the radiator inlet, and the radiator outlet is connected to the water pump inlet. The first ventilation unit has an air outlet and an air inlet. The air outlet is connected to the main generator, and the air inlet is connected to the radiator. The second ventilation unit is connected to the traction motor. This invention integrates the converter system ventilation system and the traction motor ventilation system into an independent system. However, this patent only partially integrates the converter cooling system and the traction motor ventilation cooling system, with the main generator and traction motor each using independent ventilation fans. It primarily addresses the converter cooling issue, resulting in a low degree of integration.

[0005] Therefore, existing technologies need to be improved. Summary of the Invention

[0006] This invention addresses the shortcomings of existing modular integration technologies by providing an integrated ventilation and cooling system and control method for locomotives. This system enables ventilation and cooling of the locomotive's converter system, main generator, and traction motor, reducing the number of components, saving internal space, and providing space for rational component selection and improved maintainability.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] According to one aspect of the present invention, a locomotive integrated ventilation and cooling system is provided, comprising:

[0009] A sidewall filter is installed on the outside of an opening in the sidewall of the locomotive and is connected to the outside air.

[0010] A variable flow water-cooled radiator is installed inside the opening on the side wall of the locomotive. The variable flow water-cooled radiator cools the air filtered by the side wall filter.

[0011] A ventilator is installed on the underframe of the locomotive. The underframe has an underframe air duct. The ventilator is located above the underframe air duct. The ventilator is connected and sealed to the variable flow water-cooled radiator through a transition air duct. The air inlet of the ventilator receives air cooled by the variable flow water-cooled radiator. The air outlet of the ventilator is connected and sealed to the underframe air duct.

[0012] The traction motor is mounted on the locomotive's underframe and located below the underframe air duct. The air inlet of the traction motor is connected to the air outlet of the underframe air duct, and the air outlet of the traction motor discharges the air cooled by the traction motor into the outside air.

[0013] The main generator is mounted on the locomotive's underframe and located above the underframe air duct. The air inlet of the main generator is connected to the air outlet of the underframe air duct, and the air outlet of the main generator discharges the air cooled by the main generator into the outside air.

[0014] In one embodiment of the present invention, an inner mounting flange and an outer mounting flange are respectively provided on the inner and outer sides of the opening on the locomotive side wall, the side wall filter is installed on the outer mounting flange and the converter water-cooled radiator is installed on the inner mounting flange.

[0015] In one embodiment of the present invention, a guide plate and a bypass hole are provided in the underframe air duct. Under the action of the guide plate and the bypass hole, the air cooled by the converter water-cooled radiator is distributed to the traction motor and the main generator according to the ventilation requirements of each motor.

[0016] In one embodiment of the present invention, the ventilator is controlled according to the following logic:

[0017] When the locomotive handle is detected to be in coasting or gear 1, the operating frequency of the ventilation fan is controlled to be 15Hz.

[0018] When the locomotive handle is detected to be in position 2 or 3, the operating frequency of the ventilation fan is controlled to be 30Hz.

[0019] When the locomotive's handle is detected to be in position 4, 5, or 6, the operating frequency of the ventilation fan is controlled to be 35Hz.

[0020] When the locomotive handle is detected to be in position 7 or 8, the operating frequency of the ventilation fan is controlled to be 40Hz.

[0021] When the locomotive's handle is detected to be in position 9, 10, or 11, the operating frequency of the ventilation fan is controlled to be 45Hz.

[0022] When the locomotive handle is detected to be in position 12, the operating frequency of the ventilation fan is controlled to be 50Hz.

[0023] In one embodiment of the present invention, the cooling water temperature protection control logic of the variable flow water-cooled radiator is as follows:

[0024] When the temperature of the cooling water in the variable flow water-cooled radiator is detected to be below 49°C, the operating frequency of the fan is controlled to be 15Hz.

[0025] When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 49°C and lower than 52°C, the operating frequency of the fan is controlled to be 30Hz, and when the cooling water temperature is detected to be lower than 47°C, the operating frequency of the fan is controlled to be reduced back to 15Hz.

[0026] When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 52℃ and lower than 55℃, the operating frequency of the fan is controlled to be 45Hz, and when the cooling water temperature is detected to be about 50℃, the operating frequency of the fan is controlled to be reduced back to 30Hz.

[0027] When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 55°C, the operating frequency of the fan is controlled to be 50Hz, and when the cooling water temperature is detected to be lower than 53°C, the operating frequency of the fan is controlled to be reduced back to 45Hz.

[0028] In one embodiment of the present invention, when the locomotive ventilation fan control logic conflicts with the converter system cooling water temperature protection control logic, the higher value of the ventilation fan frequency is taken.

[0029] According to another aspect of the present invention, a control method for ventilation and cooling using the locomotive integrated ventilation and cooling system as described above is provided, comprising the following steps:

[0030] Start the ventilator to rotate the impeller and generate negative pressure;

[0031] Under negative pressure, outside air is filtered through the side wall filter and then enters the converter water-cooled radiator to cool the cooling water of the converter system. The cooled air then enters the fan through the transition air duct.

[0032] The air entering the fan is forced into the base frame duct by the impeller, and then enters the traction motor and main generator motor respectively according to the ventilation requirements of each motor through the base frame duct, under the action of the guide plate and bypass hole.

[0033] The air entering the traction motor and the main generator is cooled separately, and then discharged into the outside atmosphere through the exhaust ports of the traction motor and the main generator, respectively.

[0034] In one embodiment of the present invention, the ventilator is controlled according to the following logic:

[0035] When the locomotive handle is detected to be in coasting or gear 1, the operating frequency of the ventilation fan is controlled to be 15Hz.

[0036] When the locomotive handle is detected to be in position 2 or 3, the operating frequency of the ventilation fan is controlled to be 30Hz.

[0037] When the locomotive's handle is detected to be in position 4, 5, or 6, the operating frequency of the ventilation fan is controlled to be 35Hz.

[0038] When the locomotive handle is detected to be in position 7 or 8, the operating frequency of the ventilation fan is controlled to be 40Hz.

[0039] When the locomotive's handle is detected to be in position 9, 10, or 11, the operating frequency of the ventilation fan is controlled to be 45Hz.

[0040] When the locomotive handle is detected to be in position 12, the operating frequency of the ventilation fan is controlled to be 50Hz.

[0041] The cooling water temperature protection control logic for the variable flow water-cooled radiator is as follows:

[0042] When the temperature of the cooling water in the variable flow water-cooled radiator is detected to be below 49°C, the operating frequency of the fan is controlled to be 15Hz.

[0043] When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 49°C and lower than 52°C, the operating frequency of the fan is controlled to be 30Hz, and when the cooling water temperature is detected to be lower than 47°C, the operating frequency of the fan is controlled to be reduced back to 15Hz.

[0044] When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 52℃ and lower than 55℃, the fan operating frequency is controlled to be 45Hz, and when the cooling water temperature is detected to be about to 50℃, the fan operating frequency is controlled to be reduced back to 30Hz.

[0045] When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 55°C, the operating frequency of the fan is controlled to be 50Hz, and when the cooling water temperature is detected to be lower than 53°C, the operating frequency of the fan is controlled to be reduced back to 45Hz.

[0046] In one embodiment of the present invention, when the locomotive ventilation fan control logic conflicts with the converter system cooling water temperature protection control logic, the higher value of the ventilation fan frequency is taken.

[0047] According to another aspect of the present invention, a locomotive is provided that integrates the locomotive integrated ventilation and cooling system as described above.

[0048] By adopting the above technical solution, the present invention has the following advantages compared with the prior art:

[0049] This invention integrates the cooling of the converter system, the main generator motor, and the traction motor, enabling a single fan to complete the ventilation and cooling of multiple systems, saving vehicle space and reducing vehicle weight.

[0050] This invention achieves ventilation and cooling for three systems using only one fan, reducing the need for fans in the converter cooling system and the main generator, and lowering manufacturing and maintenance costs. Attached Figure Description

[0051] Figure 1 This invention provides a schematic diagram illustrating the structural principle of the integrated ventilation and cooling system for locomotives.

[0052] Figure 2 This invention provides a front view schematic diagram of the integrated structure of the locomotive integrated ventilation and cooling system.

[0053] Figure 3 This invention provides a top view schematic diagram of the integrated structure of the locomotive integrated ventilation and cooling system.

[0054] Figure 4 The ventilation fan control logic diagram of the present invention is shown;

[0055] Figure 5 The temperature protection control logic diagram of the variable flow cooling system in this invention is shown.

[0056] List of reference numerals

[0057] 1. Side wall filter, 2. Variable flow water-cooled radiator, 3. Transition air duct, 4. Ventilation fan, 5. Base frame air duct, 6. Traction motor, 7. Main generator motor. Detailed Implementation

[0058] It should be understood that the embodiments of the invention shown in the exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in this invention, those skilled in the art will readily recognize that various modifications are possible without substantially departing from the teachings of the invention. Accordingly, all such modifications should be included within the scope of the invention. Other substitutions, modifications, variations, and deletions can be made to the design, operating conditions, and parameters of the following exemplary embodiments without departing from the spirit of the invention.

[0059] like Figure 1-3 As shown, the present invention provides an integrated ventilation and cooling system for locomotives, comprising: a sidewall filter 1, which is disposed on the outside of an opening in the sidewall of the locomotive and is connected to the outside air; a variable flow water-cooled radiator 2, which is disposed on the inside of the opening in the sidewall of the locomotive and cools the air filtered by the sidewall filter 1; and a ventilator 4, which is mounted on the underframe of the locomotive, the underframe having an underframe air duct 5, the ventilator 4 being located above the underframe air duct 5, the ventilator 4 being connected and sealed to the variable flow water-cooled radiator 2 via a transition air duct 3, and the air inlet of the ventilator 4 receiving air from the variable flow water-cooled radiator. Air cooled by heater 2 is connected and sealed at the outlet of fan 4 to the underframe duct 5; traction motor 6 is mounted on the underframe of the locomotive and located below the underframe duct 5, with its inlet connected to the outlet of the underframe duct 5, and its outlet discharging the air cooled by the traction motor 6 into the outside air; main generator 7 is mounted on the underframe of the locomotive and located above the underframe duct 5, with its inlet connected to the outlet of the underframe duct 5, and its outlet discharging the air cooled by the main generator 7 into the outside air.

[0060] Through the above-described technical solution of this invention, the present invention integrates the cooling of the converter system, the cooling of the main generator motor, and the cooling of the traction motor, enabling a single fan to complete the ventilation and cooling of multiple systems, saving vehicle space and reducing vehicle weight. This invention achieves ventilation and cooling of three systems with only one fan, reducing the need for converter cooling system fans and main generator fans, thus lowering manufacturing and maintenance costs.

[0061] In the aforementioned integrated ventilation and cooling system for locomotives, such as Figure 2As shown, an inner mounting flange (not shown) and an outer mounting flange (not shown) are respectively provided on the inner and outer sides of the opening on the locomotive side wall. The side wall filter 1 is installed on the outer mounting flange and the converter water-cooled radiator 2 is installed on the inner mounting flange.

[0062] In the aforementioned integrated ventilation and cooling system for locomotives, such as Figure 1 As shown, the underframe air duct 5 is equipped with a guide plate (not shown) and a bypass hole (not shown). Under the action of the guide plate and the bypass hole, the underframe air duct 5 distributes the air cooled by the converter water-cooled radiator to the traction motor 6 and the main generator motor 7 according to the ventilation requirements of each motor.

[0063] In the aforementioned integrated ventilation and cooling system for locomotives, such as Figure 4 As shown, the ventilation fan is controlled according to the following logic:

[0064] When the locomotive handle is detected to be in coasting or gear 1, the operating frequency of the ventilation fan 4 is controlled to be 15Hz.

[0065] When the locomotive handle is detected to be in position 2 or 3, the operating frequency of the ventilation fan 4 is controlled to be 30Hz.

[0066] When the locomotive's handle is detected to be in position 4, 5, or 6, the operating frequency of the ventilation fan 4 is controlled to be 35Hz.

[0067] When the locomotive handle is detected to be in position 7 or 8, the operating frequency of the ventilation fan 4 is controlled to be 40Hz.

[0068] When the locomotive's handle is detected to be in position 9, 10, or 11, the operating frequency of the ventilation fan 4 is controlled to be 45Hz.

[0069] When the locomotive handle is detected to be in position 12, the operating frequency of the ventilation fan 4 is controlled to be 50Hz.

[0070] In the aforementioned integrated ventilation and cooling system for locomotives, such as Figure 5 As shown, the cooling water temperature protection control logic for the variable flow water-cooled radiator is as follows:

[0071] When the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be lower than 49°C, the operating frequency of the fan 4 is controlled to be 15Hz.

[0072] When the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be higher than 49°C and lower than 52°C, the operating frequency of the fan 4 is controlled to be 30Hz, and when the cooling water temperature is detected to be lower than 47°C, the operating frequency of the fan 4 is controlled to be reduced back to 15Hz.

[0073] When the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be higher than 52°C and lower than 55°C, the operating frequency of the fan 4 is controlled to be 45Hz, and when the cooling water temperature is detected to be lower than 50°C, the operating frequency of the fan 4 is controlled to be reduced back to 30Hz.

[0074] When the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be higher than 55°C, the operating frequency of the fan 4 is controlled to be 50Hz, and when the cooling water temperature is detected to be lower than 53°C, the operating frequency of the fan 4 is controlled to be reduced back to 45Hz.

[0075] In the aforementioned integrated ventilation and cooling system for locomotives, when the control logic of the locomotive's ventilation fan conflicts with the control logic of the converter system's cooling water temperature protection, the higher value of the ventilation fan frequency is taken.

[0076] In addition, such as Figure 1-3 As shown, the present invention also provides a control method for ventilation and cooling using the locomotive integrated ventilation and cooling system as described above, comprising the following steps: starting the ventilator 4 to generate negative pressure by rotating the impeller of the ventilator 4; under the action of negative pressure, the outside air is filtered through the side wall filter 1 and enters the converter water-cooled radiator 2 to cool the cooling water of the converter system, and the cooled air enters the ventilator 4 through the transition air duct 3; the air entering the ventilator 4 is forced into the underframe air duct 5 by the action of the impeller, and enters the traction motor 6 and the main generator 7 respectively according to the ventilation requirements of each motor through the underframe air duct 5 under the action of the guide plate and bypass hole; the air entering the traction motor 6 and the main generator 7 is cooled respectively, and discharged into the outside atmosphere through the exhaust port of the traction motor 6 and the exhaust port of the main generator 7 respectively.

[0077] In the above control methods, such as Figure 4-5 As shown, the ventilation fan 4 is controlled according to the following logic:

[0078] When the locomotive handle is detected to be in coasting or gear 1, the operating frequency of the ventilation fan 4 is controlled to be 15Hz.

[0079] When the locomotive handle is detected to be in position 2 or 3, the operating frequency of the ventilation fan 4 is controlled to be 30Hz.

[0080] When the locomotive's handle is detected to be in position 4, 5, or 6, the operating frequency of the ventilation fan 4 is controlled to be 35Hz.

[0081] When the locomotive handle is detected to be in position 7 or 8, the operating frequency of the ventilation fan 4 is controlled to be 40Hz.

[0082] When the locomotive's handle is detected to be in position 9, 10, or 11, the operating frequency of the ventilation fan 4 is controlled to be 45Hz.

[0083] When the locomotive handle is detected to be in position 12, the operating frequency of the ventilation fan 4 is controlled to be 50Hz.

[0084] The cooling water temperature protection control logic for the variable flow water-cooled radiator is as follows:

[0085] When the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be lower than 49°C, the operating frequency of the fan 4 is controlled to be 15Hz.

[0086] When the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be higher than 49°C and lower than 52°C, the operating frequency of the fan 4 is controlled to be 30Hz, and when the cooling water temperature is detected to be lower than 47°C, the operating frequency of the fan 4 is controlled to be reduced back to 15Hz.

[0087] When the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be higher than 52°C and lower than 55°C, the operating frequency of the fan 4 is controlled to be 45Hz, and when the cooling water temperature is detected to be lower than 50°C, the operating frequency of the fan 4 is controlled to be reduced back to 30Hz.

[0088] When the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be higher than 55°C, the operating frequency of the fan 4 is controlled to be 50Hz, and when the cooling water temperature is detected to be lower than 53°C, the operating frequency of the fan 4 is controlled to be reduced back to 45Hz.

[0089] In the above control method, when the locomotive ventilation fan control logic conflicts with the converter system cooling water temperature protection control logic, the higher value of the ventilation fan frequency is taken.

[0090] The technical solutions of the present invention will be specifically described below through specific embodiments.

[0091] This invention provides an integrated ventilation and cooling system for locomotives and its control method. This invention integrates the cooling of the converter system, the main generator motor, and the traction motor, using a single ventilation fan for ventilation and cooling. Through reasonable arrangement and optimized matching of the underframe air ducts, the cooling requirements of the converter system, main generator motor, and traction motor are met when the locomotive is running at full power.

[0092] In embodiments of the present invention, such as Figure 1-3As shown, an opening is made in the side wall of the locomotive, with two mounting flanges, one inside and one outside. A side wall filter 1 is installed on the outer flange, and a converter water-cooled radiator 2 is installed on the inner flange. The converter water-cooled radiator 2 and the ventilator 4 are connected and sealed via a transition duct 3. The ventilator 4 is mounted on the locomotive underframe, and its outlet is connected and sealed to the underframe duct 5. The air inlet above the traction motor 6 is connected to the outlet of the underframe duct 5, and the air inlet below the main generator 7 is connected to the outlet of the underframe duct 5. The underframe duct 5, through internal structural adjustments, distributes cooling air to the traction motor 6 and the main generator 7 according to their ventilation requirements. This invention's system fully considers the cooling needs of each system, achieving integrated ventilation and cooling of the converter system and motors with a single ventilator, saving overall vehicle space and reducing overall vehicle weight.

[0093] When the above-mentioned ventilation and cooling system is working, such as Figure 1-3 As shown, the ventilator 4 starts working, and the impeller rotation generates negative pressure. Under the action of negative pressure, outside air is filtered through the side wall filter 1 and enters the converter water-cooled radiator 2 to cool the cooling water of the converter system. The cooled air then enters the ventilator 4 through the transition air duct 3. The cooled air entering the ventilator 4 is forced into the base frame air duct 5 by the impeller. Through the base frame air duct 5, under the action of the internal guide plate and bypass holes, it enters the air inlets of the traction motor 6 and the main generator 7 respectively, according to the ventilation requirements of the motors. The traction motor 6 and the main generator 7 cool the air and then discharge the cooled air into the outside atmosphere through the air outlets of the traction motor 6 and the main generator 7, respectively.

[0094] In the aforementioned ventilation and cooling system, the control logic for the fan is as follows: Figure 4 The locomotive begins operation, and the ventilation and cooling system is activated. When the locomotive's lever is detected to be in coasting or gear 1, the operating frequency of ventilation fan 4 is controlled to be 15Hz; when the lever is detected to be in gear 2 or gear 3, the operating frequency of ventilation fan 4 is controlled to be 30Hz; when the lever is detected to be in gear 4, gear 5 or gear 6, the operating frequency of ventilation fan 4 is controlled to be 35Hz; when the lever is detected to be in gear 7 or gear 8, the operating frequency of ventilation fan 4 is controlled to be 40Hz; when the lever is detected to be in gear 9, gear 10 or gear 11, the operating frequency of ventilation fan 4 is controlled to be 45Hz; and when the lever is detected to be in gear 12, the operating frequency of ventilation fan 4 is controlled to be 50Hz.

[0095] To improve system reliability, this embodiment of the invention adds cooling water temperature protection and control logic for the converter system, such as... Figure 5As shown. When the cooling system starts working, if the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be below 49℃, the operating frequency of the fan 4 is controlled to be 15Hz; if the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be above 49℃ but below 52℃, the operating frequency of the fan 4 is controlled to be 30Hz; if the cooling water temperature is detected to be approaching 47℃, the operating frequency of the fan 4 is controlled to drop back to 15Hz; if the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be above 52℃ but below 55℃, the operating frequency of the fan 4 is controlled to be 45Hz; if the cooling water temperature is detected to be approaching 50℃, the operating frequency of the fan 4 is controlled to drop back to 30Hz; if the cooling water temperature of the variable flow water-cooled radiator 2 is detected to be above 55℃, the operating frequency of the fan 4 is controlled to be 50Hz; if the cooling water temperature is detected to be approaching 53℃, the operating frequency of the fan 4 is controlled to drop back to 45Hz.

[0096] In addition, when the locomotive ventilation fan control logic conflicts with the converter system cooling water temperature protection control logic, the higher value of the ventilation fan frequency is taken.

[0097] Therefore, this invention integrates the cooling of the converter system, the main generator motor, and the traction motor, enabling a single fan to handle the ventilation and cooling of multiple systems, saving vehicle space and reducing overall vehicle weight. This invention achieves ventilation and cooling for three systems with only one fan, reducing the need for separate fans for the converter cooling system and the main generator, thus lowering manufacturing and maintenance costs.

[0098] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications or equivalent substitutions made to the present invention without departing from the spirit and scope thereof should be covered within the protection scope of the claims of the present invention.

Claims

1. An integrated ventilation and cooling system for locomotives, characterized in that, include: A sidewall filter, wherein the sidewall filter is disposed on the outside of an opening in the sidewall of the locomotive and is in communication with the outside air; A variable flow water-cooled radiator is installed inside the opening on the side wall of the locomotive, and the variable flow water-cooled radiator cools the air filtered by the side wall filter. A ventilator is mounted on the underframe of the locomotive. The underframe has an underframe air duct. The ventilator is located above the underframe air duct. The ventilator and the variable flow water-cooled radiator are connected and sealed through a transition air duct. The air inlet of the ventilator receives air cooled by the variable flow water-cooled radiator. The air outlet of the ventilator is connected and sealed to the underframe air duct. The traction motor is mounted on the underframe of the locomotive and located below the underframe air duct. The air inlet of the traction motor is connected to the air outlet of the underframe air duct, and the air outlet of the traction motor discharges the air cooled by the traction motor to the outside air. The main generator motor is mounted on the underframe of the locomotive and located above the underframe air duct. The air inlet of the main generator motor is connected to the air outlet of the underframe air duct, and the air outlet of the main generator motor discharges the air passing through the main generator motor to the outside air. An inner mounting flange and an outer mounting flange are respectively provided on the inner and outer sides of the opening on the locomotive side wall. The side wall filter is installed on the outer mounting flange and the converter water-cooled radiator is installed on the inner mounting flange. The underframe air duct is equipped with a guide plate and a bypass hole. Under the action of the guide plate and the bypass hole, the air cooled by the converter water-cooled radiator is distributed to the traction motor and the main generator according to the ventilation requirements of each motor.

2. The locomotive integrated ventilation and cooling system according to claim 1, characterized in that, The ventilation fan is controlled according to the following logic: When the locomotive's handle is detected to be in coasting or gear 1, the operating frequency of the ventilation fan is controlled to be 15Hz. When the locomotive handle is detected to be in position 2 or 3, the operating frequency of the ventilation fan is controlled to be 30Hz. When the locomotive's handle is detected to be in position 4, 5, or 6, the operating frequency of the ventilation fan is controlled to be 35Hz. When the locomotive handle is detected to be in position 7 or 8, the operating frequency of the ventilation fan is controlled to be 40Hz. When the locomotive's handle is detected to be in position 9, 10, or 11, the operating frequency of the ventilation fan is controlled to be 45Hz. When the locomotive handle is detected to be in position 12, the operating frequency of the ventilation fan is controlled to be 50Hz.

3. The locomotive integrated ventilation and cooling system according to claim 2, characterized in that, The cooling water temperature protection control logic for the variable flow water-cooled radiator is as follows: When the temperature of the cooling water in the variable flow water-cooled radiator is detected to be below 49°C, the operating frequency of the fan is controlled to be 15Hz. When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 49°C and lower than 52°C, the operating frequency of the fan is controlled to be 30Hz, and when the cooling water temperature is detected to drop to 47°C, the operating frequency of the fan is controlled to drop back to 15Hz. When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 52℃ and lower than 55℃, the operating frequency of the fan is controlled to be 45Hz, and when the cooling water temperature is detected to drop to 50℃, the operating frequency of the fan is controlled to drop back to 30Hz. When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 55℃, the operating frequency of the fan is controlled to be 50Hz, and when the cooling water temperature is detected to drop to 53℃, the operating frequency of the fan is controlled to drop back to 45Hz.

4. The locomotive integrated ventilation and cooling system according to claim 3, characterized in that, When the locomotive ventilation fan control logic conflicts with the converter system cooling water temperature protection control logic, the higher value of the ventilation fan frequency is taken.

5. A control method for ventilation and cooling using the locomotive integrated ventilation and cooling system as described in any one of claims 1-4, characterized in that, Includes the following steps: Start the ventilator to rotate the impeller and generate negative pressure; Under negative pressure, outside air is filtered through the side wall filter and then enters the converter water-cooled radiator to cool the cooling water of the converter system. The cooled air then enters the fan through the transition air duct. The air entering the fan is forced into the base frame duct by the impeller, and then enters the traction motor and main generator motor respectively according to the ventilation requirements of each motor through the base frame duct, under the action of the guide plate and bypass hole. The air entering the traction motor and the main generator is cooled separately, and then discharged into the outside atmosphere through the exhaust ports of the traction motor and the main generator, respectively.

6. The control method according to claim 5, characterized in that, The ventilation fan is controlled according to the following logic: When the locomotive's handle is detected to be in coasting or gear 1, the operating frequency of the ventilation fan is controlled to be 15Hz. When the locomotive handle is detected to be in position 2 or 3, the operating frequency of the ventilation fan is controlled to be 30Hz. When the locomotive's handle is detected to be in position 4, 5, or 6, the operating frequency of the ventilation fan is controlled to be 35Hz. When the locomotive handle is detected to be in position 7 or 8, the operating frequency of the ventilation fan is controlled to be 40Hz. When the locomotive's handle is detected to be in position 9, 10, or 11, the operating frequency of the ventilation fan is controlled to be 45Hz. When the locomotive handle is detected to be in position 12, the operating frequency of the ventilation fan is controlled to be 50Hz. The cooling water temperature protection control logic for the variable flow water-cooled radiator is as follows: When the temperature of the cooling water in the variable flow water-cooled radiator is detected to be below 49°C, the operating frequency of the fan is controlled to be 15Hz. When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 49°C and lower than 52°C, the operating frequency of the fan is controlled to be 30Hz, and when the cooling water temperature is detected to drop to 47°C, the operating frequency of the fan is controlled to drop back to 15Hz. When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 52℃ and lower than 55℃, the operating frequency of the fan is controlled to be 45Hz, and when the cooling water temperature is detected to drop to 50℃, the operating frequency of the fan is controlled to drop back to 30Hz. When the cooling water temperature of the variable flow water-cooled radiator is detected to be higher than 55℃, the operating frequency of the fan is controlled to be 50Hz, and when the cooling water temperature is detected to drop to 53℃, the operating frequency of the fan is controlled to drop back to 45Hz.

7. The control method according to claim 6, characterized in that, When the locomotive ventilation fan control logic conflicts with the converter system cooling water temperature protection control logic, the higher value of the ventilation fan frequency is taken.

8. A locomotive, characterized in that, The locomotive is equipped with an integrated ventilation and cooling system as described in any one of claims 1-4.

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