Internal combustion motor train unit equipment compartment and internal combustion motor train unit

Abstract

The invention provides an internal combustion motor train unit equipment compartment and an internal combustion motor train unit, and the equipment compartment comprises two apron boards which extend along the length direction of a train body and are arranged at intervals along the width direction of the train body; the bottom plate is parallel to the bottom of the vehicle body and is lapped between the two apron boards; the two end plates are arranged at intervals in the length direction, and a containing space used for containing an internal combustion power pack is defined by the two end plates, the apron board, the bottom plate and the vehicle body; the first ventilation module comprises a first air outlet and a plurality of first fans arranged around the internal combustion power pack, and the first air outlet is formed in the bottom plate and used for driving at least part of heat generated by the internal combustion power pack to be discharged out of the containing space through the first air outlet; and the second ventilation module is used for driving residual heat generated by the internal combustion power pack and heat of other equipment in the cabin to be discharged out of the accommodating space and allowing cold air outside the cabin to be supplemented to the accommodating space. The exhaust air rate and the pressure head of the second ventilation module are larger than those of the first ventilation module, so that overall ventilation of the equipment compartment and local ventilation of the internal combustion power pack are both considered.

Description

Technical Field

[0001] This disclosure relates to the field of rail vehicle equipment compartment technology, and more specifically, to a diesel multiple unit (DMU) equipment compartment and a DMU. Background Technology

[0002] Diesel-powered trains are railway vehicles that typically use a diesel engine (mainly a diesel engine) as the prime mover, driving the wheels through a transmission system. Unlike electric multiple units (EMUs) that rely on an external overhead contact line for power, diesel-powered trains possess independent and flexible mobility, making them particularly suitable for non-electrified railway lines, joint commissioning and testing of newly built lines, and as emergency rescue power. Their core technologies are mainly divided into two types: electric transmission and hydraulic transmission. In the electric transmission scheme, the diesel engine drives the main generator to produce electricity, which is then transmitted to the traction motors via a traction inverter. The hydraulic transmission scheme utilizes a hydraulic torque converter to transmit power from the diesel engine. Although diesel-powered trains face challenges in terms of energy efficiency and environmental emissions, their irreplaceable nature in specific scenarios has prompted the industry to continuously strive to improve overall performance and environmental friendliness by adopting high-efficiency diesel engines, hybrid power technology, and optimizing emission after-treatment systems.

[0003] The equipment compartment is a closed, integrated structure at the bottom of modern rail vehicles. Its main function is to centrally and uniformly install and protect critical equipment required for vehicle operation, such as traction converters, transformers, auxiliary power units, brake control units, air conditioning units, batteries, and various pipelines and cables. In early train designs, these devices were typically distributed under the car in a "suspended" manner. This not only exposed them to the complex external environment, making them prone to equipment failure and increasing maintenance difficulty, but also generated significant aerodynamic noise, affecting the stability and passenger comfort of the train at high speeds. The advent of the enclosed equipment compartment effectively solved these problems by creating a relatively independent and controllable internal environment.

[0004] In related technologies, diesel multiple units (DMUs) typically operate at medium to low speeds, and their diesel power packs are generally suspended under the vehicle to facilitate ventilation and heat dissipation. With the expansion of application scenarios, DMUs are often coupled with electric multiple units (EMUs) to form high-speed trainsets. In this case, additional protective measures are needed for the diesel power packs to prevent them from being impacted by foreign objects during high-speed operation. Integrating the diesel power pack into existing enclosed equipment compartments may lead to low ventilation efficiency and overheating. Therefore, how to improve the equipment compartments of DMUs to meet the environmental requirements of the diesel power pack's operation has become an urgent technical problem to be solved. Summary of the Invention

[0005] In view of this, the present disclosure provides an equipment compartment for a diesel multiple unit (DMU), which effectively improves the ventilation and heat dissipation effect in the equipment compartment through the coordinated operation of overall ventilation of the equipment compartment and local ventilation of the diesel power pack.

[0006] To achieve the above objectives, the present invention provides an equipment compartment for a diesel multiple unit (DMU), comprising: two skirts extending along the length of the vehicle body and spaced apart along the width of the vehicle body; a floor plate, parallel to the bottom of the vehicle body and overlapping the two skirts; two end plates, spaced apart along the length, forming an accommodating space with the skirts, the floor plate, and the bottom of the vehicle body for accommodating a diesel power pack; and further comprising: a first ventilation module, including: a first air outlet located on the floor plate; a plurality of first fans arranged around the diesel power pack, adapted to drive at least a portion of the heat generated by the diesel power pack to be discharged from the accommodating space through the first air outlet; and a second ventilation module adapted to drive the remaining heat generated by the diesel power pack and the heat from other equipment in the compartment to be discharged from the accommodating space, and to allow cool air from outside the compartment to be supplied to the accommodating space; the exhaust volume and pressure head of the second ventilation module are greater than those of the first ventilation module, so as to balance the overall ventilation of the equipment compartment and the local ventilation of the diesel power pack.

[0007] According to an embodiment of this disclosure, the second ventilation module includes: a second air inlet and a second air outlet, respectively disposed at both ends of the skirt in the length direction; and at least one second fan, disposed at one end of the bottom plate near the second air outlet, adapted to draw hot air in the accommodating space to the outside of the cabin through the second air outlet, so as to form a negative pressure to allow cold air from outside the cabin to be replenished into the accommodating space through the second air inlet.

[0008] According to embodiments of this disclosure, a third ventilation module is also included, configured to drive cool air from outside the cabin through the aforementioned skirt into the interior of the internal combustion power pack for heat exchange, and then discharge it through the aforementioned floor plate.

[0009] According to embodiments of this disclosure, the third ventilation module includes:

[0010] The third air inlet is provided on the aforementioned skirt panel, and the third air outlet is provided on the aforementioned base plate;

[0011] An independent air duct, one end of which is sealed to the aforementioned third air inlet, and the other end of which is sealed to the internal combustion power pack, guides the cold air from outside the cabin to bypass the aforementioned containment space and directly enter the internal combustion power pack.

[0012] The third fan is used to drive the cool air outside the cabin to flow sequentially through the aforementioned third air inlet and the aforementioned independent air duct into the internal combustion power pack, and then be discharged through the aforementioned third air outlet.

[0013] According to an embodiment of this disclosure, a sealing strip is provided at the joint between the base plate and the skirt plate.

[0014] According to embodiments of this disclosure, a mounting bracket is also included, disposed at the bottom of the vehicle body, suitable for mounting an internal combustion power pack.

[0015] According to an embodiment of this disclosure, the base plate includes a power pack guard plate connected to the mounting bracket, the first fan is arranged on the power pack guard plate, and the first air outlet is opened on the power pack guard plate.

[0016] According to an embodiment of this disclosure, the mounting bracket has a side beam that abuts against the bottom of the vehicle body and a middle beam with a preset distance between it and the bottom of the vehicle body for accommodating the internal combustion power pack. The power pack guard plate is connected to the middle beam and is connected to the side beam via a connecting component.

[0017] According to an embodiment of this disclosure, the power pack guard plate includes a plurality of sub-plates arranged along the width direction, and adjacent sub-plates are connected by an assembly assembly.

[0018] According to embodiments of this disclosure, one part of the assembly assembly is used to connect the intermediate beam, and another part is used to connect the connecting assembly.

[0019] According to an embodiment of this disclosure, the assembly assembly includes: two clamping members for clamping adjacent sub-plates respectively; and a connecting member disposed between the two clamping members, wherein both sides of the connecting member extend outwards toward the clamping members for connecting the clamping members.

[0020] According to an embodiment of the present disclosure, the assembly assembly further includes a first connecting seat mounted on the connector, the first connecting seat being configured to have an arcuate opening suitable for connection to the intermediate beam.

[0021] An exemplary embodiment of the present invention also provides a diesel multiple unit (DMU), comprising: a car body; and an equipment compartment for the DMU as described in any of the above embodiments, installed at the bottom of the car body.

[0022] The equipment compartment of the diesel multiple unit (DMU) disclosed herein utilizes multiple first fans surrounding the diesel power pack to draw in hot air from the surrounding area and exhaust it outside the compartment through first air outlets on the floor. This achieves efficient localized heat dissipation for the diesel power pack, and the heat is directly discharged downwards into the equipment compartment, preventing it from lingering and affecting other equipment. Furthermore, a second ventilation module provides overall ventilation and air exchange for the equipment compartment, expelling heat from other equipment and the diesel power pack that the first ventilation module failed to dissipate in time, while allowing cool air from outside to replenish the compartment, thus achieving overall ventilation and cooling of the equipment compartment. Moreover, the second ventilation module has a larger exhaust volume and pressure head, serving as the primary ventilation and heat dissipation method, while the first ventilation module serves as an auxiliary method. Together, they reduce the temperature inside the equipment compartment, ensuring the normal operation of all equipment and the diesel power pack within the compartment. Attached Figure Description

[0023] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 This is a first-view plan view of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure;

[0025] Figure 2 This is a perspective structural diagram of the first ventilation module of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure;

[0026] Figure 3 This is a plan view of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure from a second perspective.

[0027] Figure 4 This is a third-view plan view of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure;

[0028] Figure 5 The temperature changes at various points in the diesel power pack of the equipment compartment of a diesel multiple unit provided by an exemplary embodiment of this disclosure are shown.

[0029] Figure 6 The temperature changes at various points inside the equipment compartment of a diesel multiple unit provided by an exemplary embodiment of this disclosure are shown.

[0030] Figure 7 This is a schematic plan view of the mounting frame and base plate of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure;

[0031] Figure 8 This is a perspective structural diagram of the mounting frame and base plate of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure;

[0032] Figure 9 yes Figure 8 A partial enlarged view of the mounting bracket and base plate in the exemplary embodiment shown;

[0033] Figure 10 yes Figure 8 A partial enlarged view of the mounting bracket and base plate from another perspective in the exemplary embodiment shown;

[0034] Figure 11 yes Figure 10 A magnified view of a section at point A in the middle;

[0035] Figure 12 yes Figure 8 The exemplary embodiment shown is a three-dimensional structural view after removing the mounting bracket.

[0036] In the accompanying drawings, the meanings of the reference numerals are as follows:

[0037] 1. First ventilation module;

[0038] 11. First air outlet;

[0039] 12. First fan;

[0040] 2. Second ventilation module;

[0041] 21. Second air inlet;

[0042] 22. Second air outlet;

[0043] 23. Second fan;

[0044] 3. Third ventilation module;

[0045] 31. Third air inlet;

[0046] 32. Independent air duct;

[0047] 33. Third fan;

[0048] 4. Mounting bracket;

[0049] 41. Edge beam;

[0050] 42. Intermediate beam;

[0051] 43. Crossbeam;

[0052] 5. Skirt board;

[0053] 6. Base plate;

[0054] 61. Power pack protective plate;

[0055] 611. Sub-board;

[0056] 62. Assemble components;

[0057] 621. Clamping components;

[0058] 6211. Overlap section;

[0059] 6212, Horizontal plate;

[0060] 6213. Bending plate;

[0061] 622. Connecting parts;

[0062] 6221. Connecting part;

[0063] 6222, Box Girder;

[0064] 623. First connecting seat;

[0065] 7. End plate;

[0066] 8. Connecting components;

[0067] 81. Extension parts;

[0068] 82. Second connecting seat. Detailed Implementation

[0069] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0070] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0071] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0072] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0073] Figure 1 This is a first-view plan view of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure. Figure 2 This is a perspective structural diagram of the first ventilation module of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure. Figure 3 This is a plan view of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure from a second perspective.

[0074] Embodiments of this disclosure provide an equipment compartment for a diesel multiple unit (DMU), such as... Figures 1-3As shown, the system includes two skirt panels 5, a bottom plate 6, and two end plates 7. The two skirt panels 5 extend along the length of the vehicle body and are spaced apart along the width of the vehicle body. The bottom plate 6 is parallel to the bottom of the vehicle body and overlaps between the two skirt panels 5. The two end plates 7 are spaced apart along the length of the vehicle body and, together with the skirt panels 5, the bottom plate 6, and the bottom of the vehicle body, form a space for accommodating the internal combustion engine power pack. The system also includes a first ventilation module 1 and a second ventilation module 2. The first ventilation module 1 includes a first air outlet 11 and a plurality of first fans 12 arranged around the internal combustion engine power pack. The first air outlet 11 is located on the bottom plate 6, and the first fans 12 are used to drive at least a portion of the heat generated by the internal combustion engine power pack to be discharged from the space through the first air outlet 11. The second ventilation module 2 is used to drive the remaining heat generated by the internal combustion engine power pack and the heat from other equipment in the compartment to be discharged from the space, and allows cool air from outside the compartment to be supplied to the space. The exhaust volume and pressure head of the second ventilation module 2 are greater than those of the first ventilation module 1 to balance overall ventilation of the equipment compartment and local ventilation of the internal combustion engine power pack.

[0075] In this implementation, the internal combustion engine power pack is arranged on the floor plate 6 of the equipment compartment. During the operation of the diesel multiple unit (DMU), the power pack dissipates heat internally through its built-in cooling unit and externally through circumferential thermal radiation. Multiple first fans 12 arranged around the power pack draw in hot air from around it and exhaust it outside the compartment through the first air outlet 11 on the floor plate 6, achieving efficient heat dissipation for the power pack. This heat is directly discharged downwards into the equipment compartment, preventing it from lingering and affecting other equipment. Furthermore, the second ventilation module 2 provides overall ventilation and air exchange for the equipment compartment, expelling heat from other equipment and the power pack that the first ventilation module 1 failed to dissipate in time, while allowing cool air from outside to replenish the compartment, achieving overall ventilation and cooling of the equipment compartment. Moreover, the second ventilation module 2 has a larger exhaust volume and pressure head, serving as the primary ventilation and heat dissipation method, while the first ventilation module 1 serves as an auxiliary method. Together, they reduce the temperature inside the equipment compartment, ensuring the normal operation of all equipment and the power pack within the compartment.

[0076] According to embodiments of this disclosure, the internal combustion power pack is generally rectangular in shape, with its length extending in the same direction as the vehicle body. When installed in the equipment compartment at the bottom of the vehicle body, multiple first fans 12 are selected in different specifications depending on the size of the installation space. For example, if there is ample installation space at both ends of the internal combustion power pack along its length, slightly larger fans can be selected, with a maximum speed of 3000 rpm and a rated air volume (i.e., exhaust volume) of 1.5 m³. 3 / s, rated static pressure 1391Pa; the installation space on both sides of the internal combustion power pack is relatively small in the width direction, mainly limited by the skirt 5, so a slightly smaller fan can be selected, with a maximum speed of 2800 rpm and a rated air volume of 0.62m³. 3 / s, rated static pressure 728Pa.

[0077] For example, such as Figure 1 As shown, two fans are installed at each end of the internal combustion power pack along its length, and one fan is installed on each side along its width, in order to provide centralized heat dissipation and ventilation for the internal combustion power pack.

[0078] In one exemplary embodiment, such as Figures 1-3 As shown, the second ventilation module 2 includes a second air inlet 21, a second air outlet 22, and at least one second fan 23. The second air inlet 21 and the second air outlet 22 are respectively located at both ends of the skirt panel 5 in the length direction. The second fan 23 is located at the end of the bottom plate 6 near the second air outlet 22, and is used to draw hot air in the containment space to the outside through the second air outlet 22 to create a negative pressure so that cold air from outside the cabin is replenished into the containment space through the second air inlet 21.

[0079] In this embodiment, the second air inlet 21 and the second air outlet 22 are respectively located at both ends of the skirt plate 5, that is, they are respectively located near the two end plates 7. The second fan 23 is located near the second air outlet 22 to draw away the hot air (carrying some heat generated by the internal combustion power pack and heat from other equipment) in the containment space and discharge it through the second air outlet 22. As the hot air is discharged, a negative pressure environment is formed in the containment space. The cold air outside the cabin (air with a lower temperature relative to the containment space) enters the containment space under pressure through the second air inlet 21 located at the other end, and continues to exchange heat with the internal combustion power pack and / or other equipment.

[0080] For example, the second fan 23 can also be suspended at the bottom of the vehicle body. Preferably, there are two second fans 23, spaced apart along the width direction. Correspondingly, each skirt panel 5 is provided with a second air inlet 21 and a second air outlet 22.

[0081] Optional, the rated air volume of the second fan 23 is 2m³. 3 / s, rated pressure 600-800Pa, can be selected according to the specifications of the first fan 12.

[0082] Figure 4 This is a third-view plan view of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure.

[0083] In one exemplary embodiment, such as Figure 4 As shown, the aforementioned equipment compartment also includes a third ventilation module 3, which is configured to drive the cold air outside the compartment through the skirt 5 into the internal combustion power pack for heat exchange, and then discharge it through the bottom plate 6.

[0084] In this implementation, the internal and external heat dissipation of the internal combustion power pack are carried out separately. The heat exchanger outside the compartment directly participates in the internal heat exchange of the internal combustion power pack through the skirt 5 and the third ventilation module 3, and is discharged to the outside of the compartment through the bottom plate 6, so as to avoid sharing the cold air with the overall heat dissipation and ventilation of the equipment compartment, which would reduce the efficiency of heat dissipation and ventilation.

[0085] According to embodiments of this disclosure, such as Figure 4 As shown, the third ventilation module 3 includes a third air inlet 31, a third air outlet, an independent air duct 32, and a third fan 33. The third air inlet 31 is located on the skirt panel 5, and the third air outlet is located on the bottom plate 6. One end of the independent air duct 32 is sealed to the third air inlet 31, and the other end is sealed to the internal combustion power pack, so as to guide the cool air from outside the cabin to bypass the containment space and directly enter the internal combustion power pack. The third fan 33 is used to drive the cool air from outside the cabin and flow through the third air inlet 31 and the independent air duct 32 into the internal combustion power pack, and exhaust it from the third air outlet.

[0086] In this implementation, the third fan 33 also operates by suction, drawing out the hot air inside the internal combustion power pack and discharging it through the third air outlet. The resulting negative pressure environment causes the cold air outside the cabin to be replenished through the third air inlet 31 and the independent air duct 32. This ensures that the internal heat dissipation and ventilation of the internal combustion power pack and the heat dissipation and ventilation in the equipment compartment do not mix or interact, thus ensuring heat dissipation and ventilation efficiency.

[0087] More specifically, the internal combustion power pack is equipped with a cooling unit. A cooling working fluid circulation pipeline is arranged between the cooling unit and the internal combustion engine (preferably a diesel engine). The high-temperature working fluid flowing out of the internal combustion engine enters the radiator of the cooling unit and exchanges heat with the cold air from outside the cabin. The cooled working fluid with a lower temperature flows back to the internal combustion engine, and the hot air with a higher temperature is discharged outside the cabin.

[0088] Figure 5 The illustration shows the temperature variations at various points within the diesel power pack of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure. Figure 6 The temperature changes at various points inside the equipment compartment of a diesel multiple unit provided by an exemplary embodiment of this disclosure are illustrated.

[0089] By adopting the above exemplary embodiments, the temperature at various points inside the equipment compartment and the temperature of the internal combustion power pack are significantly reduced. For details, please refer to... Figure 5 and Figure 6 As shown, "temperature" refers to the temperature difference between ventilation heat dissipation in the exemplary embodiments of this disclosure and conventional natural ventilation heat dissipation.

[0090] In one exemplary embodiment, a sealing strip is provided at the overlap of the base plate 6 and the skirt plate 5.

[0091] In this implementation, the sealing strip improves the airtightness of the equipment compartment, ensuring that the airflow inside the compartment follows a preset pattern and preventing air leakage and turbulence. It also prevents rainwater and other liquids from seeping in.

[0092] Figure 7 This is a schematic plan view of the mounting frame and base plate of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure. Figure 8 This is a perspective structural diagram of the mounting frame and base plate of the equipment compartment of a diesel multiple unit provided in an exemplary embodiment of this disclosure.

[0093] In one exemplary embodiment, the aforementioned diesel multiple unit equipment compartment further includes a mounting bracket 4, disposed at the bottom of the vehicle body, suitable for installing the diesel power pack.

[0094] In such an implementation, such as Figure 7 and Figure 8 As shown, the mounting bracket 4 is installed at the bottom of the vehicle body and is constructed into a roughly bowl-shaped structure. The internal combustion power pack is installed on the mounting bracket 4 and is located between the vehicle body and the mounting bracket 4.

[0095] According to embodiments of this disclosure, such as Figure 2 , Figure 7 and Figure 8 As shown, the base plate 6 includes a power pack guard plate 61, which is connected to the mounting bracket 4. The first fan 12 is arranged on the power pack guard plate 61, and the first air outlet 11 is opened on the power pack guard plate 61.

[0096] In this embodiment, the power pack guard plate 61 in the base plate 6 is connected to the mounting bracket, and the first air outlet 11 and the first fan 12 are both mounted on the power pack guard plate 61.

[0097] More specifically, the base plate 6 is composed of multiple plates, including the power pack protective plate 61 and the conventional base plate. The equipment compartment includes a frame, and the skirt plate 5 and end plate 7 are all embedded in the frame. The conventional base plate slides to the installation position through slides extending along the width direction. Multiple slides are arranged parallel to each other along the length direction. A conventional base plate is arranged between adjacent slides to support other equipment.

[0098] According to embodiments of this disclosure, such as Figure 7 and Figure 8 As shown, the mounting bracket 4 has a side beam 41 that abuts against the bottom of the vehicle body, and a middle beam 42 with a preset distance between it and the bottom of the vehicle body to accommodate the internal combustion power pack. The power pack guard plate 61 is connected to the middle beam 42 and to the side beam 41 through the connecting assembly 8.

[0099] In this implementation, because the length of the internal combustion power pack is greater than the preset distance between the two slides and its height is relatively high, the conventional floor plate under the internal combustion power pack needs to be designed to be lowered, which would result in an uneven bottom of the equipment compartment. By connecting the power pack guard plate 61 to both the side beam 41 and the middle beam 42 of the mounting frame 4, not only can the internal combustion power pack be effectively protected, but the installation space required in the height direction can also be reduced, allowing the power pack guard plate 61 to be roughly flush with the conventional floor plate, thus reducing air resistance during driving.

[0100] In some other embodiments, the mounting bracket 4 also includes a crossbeam 43 extending in the width direction, two side beams 41 are provided, which are respectively connected to the two ends of the crossbeam 43, and the middle beam 42 extends from the middle of the crossbeam 43, extends downward to a preset height, and then continues to extend along the length of the vehicle body to the same length as the side beams 41.

[0101] In this embodiment, the intermediate beam 42 extends downward while simultaneously extending along its length, meaning that the angle between it and the power pack guard plate 61 is an acute angle.

[0102] More specifically, at the ends of the side beams 41 and the middle beams 42, or the ends away from the crossbeams 43, there are curved beams. The curved beams pass through the first side beam 41, the middle beam 42 and the other side beam 41 in sequence to connect them into a whole.

[0103] In some optional embodiments, the specific arrangement of the internal combustion power pack can be as follows: the diesel engine and its mounting base are arranged around the intermediate beam 42; the fuel filter, preheating system, oil filler pipe, muffler, etc. are arranged around the side beam 41; and the generator, urea tank, electrical control box mounting base, water-to-air intercooler aftertreatment urea pump, etc. are arranged around the crossbeam 43 or the curved beam.

[0104] More specifically, the power pack guard plate 61 includes a plurality of sub-plates 611 extending in the width direction, with adjacent sub-plates 611 connected by an assembly assembly 62.

[0105] In this embodiment, the assembled power pack guard plate 61 has better expandability, and the smaller sub-plate 611 is easier to produce and transport.

[0106] Figure 9 yes Figure 8 The exemplary embodiment shown includes a partial enlarged view of the mounting bracket and the base plate. Figure 10 yes Figure 8 In the exemplary embodiment shown, a partial enlarged view of the mounting bracket and base plate from another perspective is provided. Figure 11 yes Figure 10 A magnified view of a portion of point A in the middle. Figure 12 yes Figure 8 The exemplary embodiment shown is a three-dimensional structural view after removing the mounting bracket.

[0107] According to embodiments of this disclosure, such as Figure 8 and Figure 9 As shown, one part of the assembly component 62 is used to connect the intermediate beam 42, and the other part is used to connect the connecting component 8.

[0108] In this embodiment, the assembly component 62 is used to connect the intermediate beam 42 and the connecting component 8. Since the assembly component 62 is the splicing carrier between adjacent sub-plates 611, it is easy to operate by connecting the assembly component 62 to the intermediate beam 42 or the connecting component 8, and it can reduce damage to the structure of the sub-plate 611 and ensure its service life.

[0109] In one exemplary embodiment, such as Figure 9 and Figure 10 As shown, the assembly assembly 62 includes two clamping members 621 and a connecting member 622. The two clamping members 621 are used to clamp adjacent sub-plates 611 respectively. The connecting member 622 is disposed between the two clamping members 621. The two sides of the connecting member 622 extend outwards towards the clamping members 621 with connecting portions 6221, which are suitable for connecting the clamping members 621.

[0110] In this implementation, the clamping member 621 clamps the sub-plate 611, which improves the sealing performance at the connection. Connecting the two clamping members 621 together via the connector 622 alleviates stress concentration at the edge of the sub-plate 611 and extends its service life. Furthermore, the connector 622 is more flexible in design; for example, it can be equipped with an extension structure or its shape can be optimized to improve rigidity and strength.

[0111] According to embodiments of this disclosure, such as Figure 10 As shown, the assembly 62 also includes a first connecting seat 623 mounted on the connector 622, the first connecting seat 623 being configured to have an arcuate opening suitable for connection to the intermediate beam 42.

[0112] In this embodiment, the first connecting seat 623 is connected to the connecting piece 622 by bolts, and the arc-shaped opening is fitted with the intermediate beam 42 and welded together.

[0113] More specifically, such as Figure 10 and Figure 11 As shown, the clamping member 621 extends outward toward the connecting member 622 with an overlapping portion 6211. The overlapping portion 6211 and the connecting portion 6221 at least partially overlap in the vertical direction and are fixed by bolts and nuts.

[0114] In this embodiment, the overlapping portion 6211 and the connecting portion 6221 partially overlap, and the overlapping portion is fastened with bolts and nuts. This not only ensures a stable and reliable connection, but also extends the liquid leakage path and further improves the sealing performance.

[0115] Further according to embodiments of this disclosure, such as Figure 11 As shown, the clamping member 621 includes a horizontal plate 6212 and a bent plate 6213. A portion of the horizontal plate 6212 rests on the upper surface of the sub-plate 611, and another portion rests on the upper surface of the connecting portion 6221. The bent plate 13 extends downward from the lower surface of the horizontal plate 6212 by a distance equal to the thickness of the sub-plate 611, and bends toward the sub-plate 611 to cooperate with the horizontal plate 6212 in clamping the sub-plate 611.

[0116] In this embodiment, the bending plate 6213 is constructed in a generally L-shape, with the horizontal portion of the L-shape and the horizontal plate 6212 used to clamp the sub-plate 611, and the vertical portion used to limit the sub-plate 611 in the length direction. The horizontal plate 6212 and the bending plate 6213 are preferably integrally formed, but they can also be connected by welding.

[0117] In some other embodiments, a rubber pad is provided between the sub-plate 611 and the horizontal plate 6212 and the bending plate 6213 to absorb vibration and avoid frictional wear between the sub-plate 611 and the clamping member 621.

[0118] In one exemplary embodiment, such as Figure 11 As shown, the connector 622 includes a box beam 6222, with the bottom sides of the box beam 6222 extending outwards towards the two clamping members 621.

[0119] In this embodiment, the connector 622 is composed of a box beam 6222 extending along the width direction and connecting portions 6221 on both sides. The connecting portions 6221 extend from the bottom of the box beam 6222. The box structure has the advantages of both stability and lightweight. At the same time, the connecting portions 6221 and the box beam 6222 are an integral structure with high reliability.

[0120] In some other embodiments, the cross-section of the clamping member 621 can also be configured as an "I" shape, and the clamping member 621 clamps both the connecting part 6221 and the subplate 611 to further improve stability and sealing.

[0121] In one exemplary embodiment, such as Figure 12 As shown, the connecting assembly 8 includes an extension 81 and a second connecting seat 82. One end of the extension 81 is connected to the assembly assembly 62 and is configured to extend upward toward the side beam 41. The second connecting seat 82 is mounted on the other end of the extension 81 and is configured to have an arcuate opening suitable for connection to the side beam 41.

[0122] In this implementation, since the side beam 41 abuts against the bottom of the vehicle body, and the power pack guard plate 61 is located below the internal combustion power pack, there is a height difference between the power pack guard plate 61, i.e., the assembly component 62, and the side beam 41. The difference is approximately equal to the preset distance. By providing an extension member 81 and cooperating with the second connecting seat 82, the connection between the assembly component 62 and the side beam 41 is achieved.

[0123] Similar to the first connecting seat 623, the second connecting seat 82 also has an arc-shaped opening, and is installed with the side beam 41 through the arc-shaped opening for welding connection.

[0124] For example, such as Figure 9 and Figure 12 As shown, the extension member 81 is constructed as a rectangular frame structure and is bolted to the T-beam via the first and second adapters in the aforementioned embodiment. The second connecting seat 82 has a vertical plate extending along the height direction, an arc-shaped plate with an arc-shaped opening perpendicular to the vertical plate, and a mounting plate parallel to the power pack protective plate 61. The mounting plate is bolted to the extension member 81.

[0125] An exemplary embodiment of this disclosure also provides a diesel multiple unit (DMU), including a car body and an equipment compartment as described in any of the above embodiments, the equipment compartment being mounted at the bottom of the car body.

[0126] Those skilled in the art will understand that the features described in the various embodiments of this disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. In particular, the features described in the various embodiments of this disclosure can be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0127] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. An equipment compartment for a diesel multiple unit (DMU), comprising: Two skirts that extend along the length of the vehicle body and are spaced apart along the width of the vehicle body; The floor plate is set parallel to the bottom of the vehicle body and overlaps between the two skirt plates; Two end plates are spaced apart along the length direction and together with the skirt, the bottom plate and the bottom of the vehicle body, form a receiving space for accommodating the internal combustion power pack; Its characteristic is that it further includes: The first ventilation module includes: The first air outlet is located on the base plate; Multiple first fans arranged around the internal combustion power pack are adapted to drive at least a portion of the heat generated by the internal combustion power pack out of the containment space through the first air outlet. The second ventilation module is adapted to expel the remaining heat generated by the internal combustion power pack and the heat from other equipment in the cabin from the containment space, and to allow cool air from outside the cabin to be supplied to the containment space; The exhaust volume and pressure head of the second ventilation module are greater than those of the first ventilation module, so as to take into account both the overall ventilation of the equipment compartment and the local ventilation of the internal combustion power pack.

2. The equipment compartment according to claim 1, characterized in that, The second ventilation module includes: The second air inlet and the second air outlet are respectively located at both ends of the skirt in the length direction; At least one second fan is disposed at one end of the base plate near the second air outlet, and is adapted to draw hot air in the containment space to the outside of the cabin through the second air outlet to form a negative pressure so that cold air from outside the cabin is replenished into the containment space through the second air inlet.

3. The equipment compartment according to claim 1, characterized in that, It also includes a third ventilation module, configured to drive cool air from outside the cabin through the skirt into the internal combustion power pack for heat exchange, and then exhaust it through the floor plate.

4. The equipment compartment according to claim 3, characterized in that, The third ventilation module includes: A third air inlet is provided on the skirt panel, and a third air outlet is provided on the bottom plate; An independent air duct, one end of which is sealed to the third air inlet and the other end of which is sealed to the internal combustion power pack, guides the cold air outside the cabin to bypass the containment space and directly enter the internal combustion power pack; The third fan is used to drive the cool air outside the cabin to flow sequentially through the third air inlet and the independent air duct into the internal combustion power pack, and then be discharged from the third air outlet.

5. The equipment compartment according to claim 1, characterized in that, A sealing strip is provided at the joint between the base plate and the skirt plate.

6. The equipment compartment according to any one of claims 1-5, characterized in that, It also includes a mounting bracket, located at the bottom of the vehicle body, suitable for mounting an internal combustion power pack.

7. The equipment compartment according to claim 6, characterized in that, The base plate includes a power pack protective plate, which is connected to the mounting frame. The first fan is arranged on the power pack protective plate, and the first air outlet is opened on the power pack protective plate.

8. The equipment compartment according to claim 7, characterized in that, The mounting bracket has a side beam that abuts against the bottom of the vehicle body, and a middle beam with a preset distance between it and the bottom of the vehicle body to accommodate the internal combustion power pack. The power pack guard plate is connected to the middle beam and to the side beam via a connecting assembly.

9. The equipment compartment according to claim 8, characterized in that, The power pack protective plate includes multiple sub-plates arranged along the width direction, and adjacent sub-plates are connected by assembly components.

10. The equipment compartment according to claim 9, characterized in that, One part of the assembly components is used to connect the intermediate beam, and the other part is used to connect the connecting components.

11. The equipment compartment according to claim 10, characterized in that, The assembly components include: Two clamping components are used to clamp adjacent sub-boards respectively; A connector is disposed between the two clamping members, with two sides of the connector extending outwards toward the clamping members for connecting the clamping members.

12. The equipment compartment according to claim 11, characterized in that, The assembly assembly also includes a first connector mounted on the connector, the first connector being configured to have an arcuate opening suitable for connection to the intermediate beam.

13. A diesel multiple unit (DMU), characterized in that, include: Vehicle body; The equipment compartment of the diesel multiple unit as described in any one of claims 1-12 is installed at the bottom of the vehicle body.

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