Engine air inlet cooling system and engineering machinery

Abstract

The utility model relates to an engine air inlet cooling system for engineering machinery, which comprises an air cooler, and is characterized in that the engine air inlet cooling system comprises an adjusting device which is used for adapting the effective heat exchange amount of the air cooler as required, and the adjusting device comprises a heat insulation substrate part, the heat-insulating substrate portion is positioned such that a first face thereof faces the windward side or leeward side of the core of the air cooler and the first face side abuts against the windward side or leeward side surface of the core of the air cooler in a sealing manner in at least one annular region. The utility model further relates to engineering machinery with the engine air inlet cooling system.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, in particular to an engine intake air cooling system for construction machinery and a construction machinery equipped with the engine intake air cooling system. Background Art

[0002] A roller, as a typical example of construction machinery, is a large construction machinery and equipment for road construction, and is widely used in the construction of various roads and sites such as railways, highways, bridges, docks, airports, etc. It can improve the density and strength of the road surface, increase the bearing capacity of the road surface, reduce the potholes and subsidence of the road surface, and ensure the smoothness and safety of the road. However, with the progress of technology, construction machinery is developing towards modularization, intelligentization and specialization, and users have put forward higher requirements for the reliability, environmental protection and diversity of vehicles. In order to meet the market and customer needs, the R & D and iteration speed of construction machinery products is very fast.

[0003] The construction machinery 1 represented by a roller mainly consists of a power system 10, a transmission system 20, a working system 20, a control system 40, etc., as Figure 1 shown.

[0004] The power system 10 is one of the key systems of the roller product, and its composition and layout are as Figure 2 shown. The power system not only determines the working performance of the machine, but also affects the compliance, economy and environmental protection of the product, and is the focus that customers care about. The existing engine intake air cooling system 100' is an important part of modern engines. Its function is to cool the hot air entering the engine combustion chamber to an appropriate temperature range to improve the combustion efficiency. At the same time, by cooling the combustion air of the engine, the temperature of engine components can be reduced, the service life of components can be extended, and the reliability and stability of the engine can be improved. With the continuous enrichment of the product spectrum, engines of various types and displacements are applied to the products, and different models of intake air cooling systems are required to match them, resulting in a large number of components in the engine intake air cooling system of the same series of products, poor interchangeability of components, and high product costs, which bring great challenges to product production and service.

[0005] Therefore, the utility model is committed to making one or more improvements to the existing technology. Summary of the Utility Model

[0006] Aiming at the defects of the existing technology, the utility model provides an engine intake air cooling system that can be adaptively adjusted according to the required engine intake air temperature. Through this engine intake air cooling system, different models of engines can be matched, which is beneficial to reducing the types of engine intake air cooling systems, facilitating production and service, and reducing product costs.

[0007] According to one aspect of the present utility model, an engine intake air cooling system for construction machinery is provided, including an air cooler. It is characterized in that the engine intake air cooling system includes an adjusting device configured to adapt the effective heat exchange amount of the air cooler as required. The adjusting device includes a heat insulation substrate portion, and the heat insulation substrate portion is positioned such that its first surface faces the windward side or the leeward side of the core of the air cooler, and the first surface abuts against the surface of the windward side or the leeward side of the core of the air cooler in a sealed manner in at least one annular region.

[0008] The engine intake air cooling system according to the present utility model can thus match more models of engines, facilitating production and reducing manufacturing costs.

[0009] In an advantageous embodiment, the sealed abutting surface of the first surface located in the annular region is provided by an elastic seal. Thereby, it is ensured that a certain heat insulation space is formed, effectively adjusting the engine intake air temperature. In addition, a certain installation error can be allowed through the elastic deformation amount to avoid excessive installation stress.

[0010] In an advantageous embodiment, at least one section of the seal is configured as a detachable sealing strip. Thereby, it is convenient to change the shape or size of the annular region, playing a role in adjustment.

[0011] In an advantageous embodiment, the sealing strip is arranged on the heat insulation substrate portion by means of a glued connection. Thereby, the sealing strip is allowed to be reused, and the heat insulation substrate portion can also be reused, making the adjustment method flexible and variable while reducing the adjustment cost.

[0012] In an advantageous embodiment, the adjusting device includes a mounting plate portion integrally extending from the heat insulation substrate portion, and the mounting plate portion is configured to fix the adjusting device on the air cooler. Thereby, the adjusting device can be formed by bending a thin plate, which is simple, convenient and low-cost to manufacture.

[0013] In an advantageous embodiment, the adjusting device includes a mounting bracket. The first branch of the mounting bracket is detachably mounted on the second surface of the heat insulation substrate portion facing away from the air cooler, and the second branch of the mounting bracket is detachably mounted to the engine radiator of the construction machinery. The first branch and the second branch form an L-shaped bracket. With this configuration, it is beneficial to ensure the installation stability of the adjusting device and avoid the risk of falling due to the vibration of the machine.

[0014] In an advantageous embodiment, the second branch extends in a direction away from the air cooler relative to the first branch. Thereby, the assembly operation space is sufficient and simple to implement.

[0015] In an advantageous embodiment, at least one set of mounting holes is provided on the first branch of the mounting bracket, and each set of mounting holes has three mounting holes distributed in a triangular pattern. At least one set of mounting holes is provided on the heat insulation substrate portion, and any set of mounting holes on the heat insulation substrate portion is configured to be capable of matching any set of mounting holes on the first branch of the mounting bracket. With this configuration, the heat insulation substrate portion can have multiple different assembly positions relative to the mounting bracket, and thus further expands the available adjustment range of the adjustment device for the engine intake air temperature.

[0016] According to another aspect of the present invention, there is provided a construction machine, including an engine, an engine intake air cooling system, and an engine radiator arranged close to an air cooler of the engine intake air cooling system, characterized in that the engine intake air cooling system is the above-mentioned engine intake air cooling system.

[0017] In an advantageous embodiment, the construction machine is a road roller.

[0018] According to the engine intake air cooling system of the present invention, by means of the flexible and diverse adjustment methods of the adjustment device, the engine intake air temperature can be adjusted as needed, and it is adapted to more different models of engines. Therefore, the engine intake air cooling system according to the present invention has a wider range of application occasions and a better market prospect. Description of the Drawings

[0019] The exemplary embodiments of the present invention are described with reference to the accompanying drawings, wherein:

[0020] Figure 1 Showing a general schematic diagram of an existing road roller;

[0021] Figure 2 Showing the power system arranged in the cabin of an existing road roller;

[0022] Figure 3 Showing the arrangement of the engine intake air cooling system and the engine radiator according to the present invention;

[0023] Figure 4 Showing a schematic diagram obtained by observing the adjustment device of the engine intake air cooling system according to the present invention from the outside; and

[0024] Figure 5 Showing the view from the inside Figure 4 The schematic diagram obtained by observing the shown adjustment device.

[0025] Reference Signs:

[0026] 1 - Construction machinery; 10 - Power system; 20 - Transmission system; 30 - Working system; 40 - Control system; R - Engine radiator; 100’ - Existing engine intake air cooling system; 100 - Engine intake air cooling system; 101 - Intake manifold; 102 - Air cooler; 103 - Exhaust manifold; 104 - Adjusting device; 1040 - Heat insulation substrate part; S - Elastic seal; 1041 - Mounting plate part; 1041h - Bolt hole; 1042 - Mounting bracket; 1042a - First branch; 1042b - Second branch.

[0027] The attached drawings are only schematic and are not necessarily drawn to scale. In addition, they only show those parts that are necessary to illustrate the present invention, and other parts are omitted or only mentioned. That is, in addition to the components shown in the attached drawings, the present invention may also include other components. Detailed implementation manners

[0028] The technical solutions of the present invention will be described in detail below with reference to the attached drawings. In the following description, many specific details are set forth in order to enable those skilled in the art to more fully understand the present invention. However, it is obvious to those skilled in the art that some of these specific details may not be required for the implementation of the present invention. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, the present invention can be implemented by any combination of the following features and elements, regardless of whether they relate to different embodiments.

[0029] Figure 3 Shows the layout relationship between the engine intake air cooling system 100 of the present invention and the engine radiator R. As Figure 2 shown, the engine intake air cooling system 100 includes an intake manifold 101, an air cooler 102 fluidly connected to the intake manifold, and an exhaust manifold 103 fluidly connected to the air cooler. The outside air flows into the engine through the air filter. After being turbocharged, it becomes a hot air stream with a higher density. The hot air stream enters the air cooler 102 through the intake manifold 101. The air cooler serves as the core component of the engine intake air cooling system. The working principle of the air cooler is to exchange heat with the cold air from the outside through its own area and transfer the internal heat out, thereby effectively cooling the incoming hot air and reducing the temperature of the air flowing into the air cooler to a predetermined range to meet the engine combustion requirements. Therefore, the air cooler is configured to cool the temperature of the intake air to be entered into the engine. One end of the exhaust manifold 103 is connected to the air cooler, and the other end is connected to the engine throttle valve. The air flowing out of the exhaust manifold becomes fresh air with a suitable temperature after being cooled by the air cooler. This part of the fresh air is continuously supplied to the engine for internal combustion and does external work through the transmission mechanism.

[0030] Referring to Figure 3 As shown, the air cooler 102 is arranged in parallel with the engine radiator R and assembled together in the cooling package. Therefore, the air cooler and the engine radiator can share the same fan (not shown) to force external cold air to pass through the air cooler and the engine radiator.

[0031] As Figure 3 shown, the engine intake air cooling system 100 according to the present invention includes an adjusting device 104. The adjusting device is configured to adapt the effective heat exchange amount of the air cooler as needed. Specifically, the actual channel area for heat exchange of the air cooler is adjusted according to the required engine intake air temperature (or the air temperature discharged from the outlet manifold). In this article, the "effective heat exchange area" refers to the area that actually participates in the heat exchange between the air and the external cold air. For the flow dead zone area, this part of the heat exchange area is not effectively utilized. Therefore, the surface area in this area can be called the ineffective heat exchange area.

[0032] The amount of the effective heat exchange area determines the heat actually dissipated when the air enters the air cooler and exits from the air cooler, and thus determines the temperature of the air discharged from the outlet manifold and the intake air entering the engine.

[0033] Referring to Figure 4 and Figure 5 shown, the adjusting device 104 includes a heat insulation substrate portion 1040. The body of the heat insulation substrate portion is made of, for example, a thin metal plate. As Figure 3 shown, the heat insulation substrate portion is positioned such that its first surface faces the windward side or the leeward side of the core of the air cooler. The first surface side of the heat insulation substrate portion abuts against the windward side or the leeward side surface of the core in at least one annular region in a sealed manner. In this article, the "annular region" includes not only the annular region (the annular region has a shape or structure of a closed loop, that is, the starting point and the ending point are connected to form a continuous loop-like structure), but also the disc-shaped region. The disc-shaped region refers to a geometric figure region whose outer contour is a closed ring but there is no inner contour. Therefore, the disc-shaped region can be regarded as countless annular regions arranged to cover the region defined by the outer periphery.

[0034] As Figure 5As shown, an elastic seal S (such as a rubber seal) is provided on the first surface side of the heat-insulating substrate portion 1040. When the heat-insulating substrate portion abuts against the air cooler core in the annular region, the side of the elastic seal that contacts the air cooler core provides a sealing abutment surface. Thus, although the internal space surrounded by the annular region communicates with a part of the cold air flow passage of the air cooler core, this part of the cold air flow passage is formed into a "dead" passage due to the blockage of the air flow by the heat-insulating substrate portion and the seal provided by the seal, and the heat transfer area provided by this part of the "dead" passage constitutes an ineffective heat transfer area. In addition, a box-shaped structure or a blocking structure with one side open is jointly defined by the seal and the plate portion or the disc-shaped seal enclosed by the annular seal in the heat-insulating substrate portion. This box-shaped structure or blocking structure provides a closed heat-insulating space (heat-insulating structure), increasing the heat transfer resistance between the air cooler and the outside, that is, reducing the rate of heat exchange between the air cooler and the outside. Therefore, compared with the engine intake air cooling system without a regulating device, the engine intake air temperature can be increased.

[0035] For the degree of increase in the engine intake air temperature, it can also be adjusted by changing the size of the heat-insulating substrate portion of the regulating device, the size and shape of the annular region, and the position of the heat-insulating substrate portion (or the annular region) relative to the air cooler core.

[0036] In an embodiment of the present invention, at least one section of the elastic seal is configured as a detachable sealing strip. For example, in Figure 5 the embodiment shown, the elastic seal S is integrally square-ring-shaped and is positioned in a substantially square annular region. The sealing strips forming the four sides are connected end to end or integrally formed. At least one (or at least one section) of the four sealing strips is configured to be detachable, that is, detached from the body of the heat-insulating substrate portion. The detached sealing strip can be shifted to a suitable preset position, or alternatively, by increasing or decreasing the arrangement of the sealing strips, a new annular region can be re-formed. The area covered by the new annular region (and the box-shaped heat-insulating structure formed) can be increased or decreased. The positioning of the new annular region relative to the core of the air cooler can also be changed. Therefore, the ineffective heat transfer area or the heat-insulating space can be correspondingly increased or decreased, or the cold air passage path can be changed, thereby realizing the adjustment of the engine intake air temperature. Advantageously, the sealing strip is provided on the heat-insulating substrate portion by means of glue connection. Thus, the body of the same heat-insulating substrate portion can be reused without remanufacturing. In addition, by using a reusable adhesive, the sealing strip can also be reused, thus saving a part of the manufacturing cost of manufacturing the sealing strip.

[0037] Generally, the thermal design of the air cooler 102 is based on the engine limit matching intake air temperature and is designed with a certain margin considered. The air cooler is a fixed entity structure. Once it is manufactured, its volume and maximum available heat dissipation area are fixed, and its designed cooling power is determined. According to the present utility model, by installing an adjusting device on the air cooler, the effective heat exchange amount of the air cooler can be adjusted and adapted as needed. Therefore, the range of engine series products that can be adapted is greatly increased.

[0038] Refer to Figure 4 and Figure 5 As shown, the adjusting device 104 includes a mounting plate portion 1041 integrally extending from the heat insulation substrate portion 1040. The mounting plate portion is configured to fix the adjusting device to the air cooler. In the illustrated embodiment, bolt holes 1041h are provided on the mounting plate portion 1041. When the heat insulation substrate portion is positioned to abut against the air cooler core, the bolt holes formed on the mounting plate portion are aligned with the bolt holes formed on the side of the air cooler (or its side frame), and a fastener such as a bolt is passed through the aligned bolt holes to mount and fix the heat insulation substrate portion to the air cooler.

[0039] The adjusting device 104 may further include a mounting bracket 1042 configured to mount and fix the heat insulation substrate portion or the adjusting device to the engine radiator or other fixed components. In the illustrated embodiment, the engine radiator is arranged close to the air cooler and faces the same fan. Therefore, it is advantageous to fix and install the adjusting device to the engine radiator by means of the mounting bracket. Thus, the installation and maintenance are greatly facilitated. As Figure 4 shown, the mounting bracket 1042 includes a first branch 1042a and a second branch 1042b, and the first branch and the second branch form an L-shaped bracket. The first branch 1042a is configured to be detachably mounted on the second surface side of the heat insulation substrate portion facing away from the cooler. The second branch 1042b is configured to be detachably mounted to the engine radiator (refer to Figure 3 ). Preferably, the L-shaped bracket is formed as a one-piece bent plate. In the illustrated embodiment, a set of mounting holes is provided on the first branch 1042a. The set of mounting holes has three mounting holes distributed in a triangular pattern. The heat insulation substrate portion is correspondingly provided with mounting holes matching these mounting holes, so as to facilitate assembling and fixing the heat insulation substrate portion and the first branch together when the mounting holes on the heat insulation substrate portion are aligned with the mounting holes on the first branch.

[0040] Although Figure 4Only a set of mounting holes is shown on the first branch. It can be understood that there are two or more sets of mounting holes spaced in the vertical direction on the first branch. The heat insulation substrate part can be designed to have a sufficient vertical extension length, and the same number of sets of mounting holes are distributed in the vertical direction. Thus, a set of mounting holes on the first branch is used and aligned with a corresponding set of mounting holes formed on the heat insulation substrate part, and bolts are passed through the aligned mounting holes to fasten and connect the two. Correspondingly, the mounting plate part can also be provided with a plurality of mounting holes spaced in the vertical direction so that there are always bolt holes available for alignment with the bolt holes on the air cooler frame when the heat insulation substrate part is moved vertically. By changing the matching correspondence between the mounting holes on the first branch and the mounting holes on the heat insulation substrate part, the positioning of the heat insulation substrate part relative to the air cooler core can be changed. Thus, the effective heat exchange amount of the air cooler is changed, and further the engine intake air temperature is adjusted.

[0041] In Figures 3 to 5 In the illustrated embodiment, the second branch 1042b of the mounting bracket extends away from the air cooler 102 relative to the first branch 1042a. The adjusting device 104 is fixedly installed through the mounting plate part 1041 and the second branch of the mounting bracket 1042, so that the heat insulation substrate part and the seal thereon are located at a selected adjustment position relative to the air cooler core. The bolt fastening force applied to the mounting plate part indirectly presses the heat insulation substrate part against the air cooler core. At the same time, the fastening force applied by the fasteners on the second branch of the mounting bracket or the expansion force formed thereby further squeezes the heat insulation substrate part toward the air cooler core, increasing the elastic deformation of the seal, and making the sealing abutting surface of the seal closely fit with the surface of the air cooler core, obtaining enhanced sealing performance.

[0042] Although the adjusting device is fixedly installed by using a mounting bracket and a mounting plate part in the illustrated embodiment, it can be understood that other mounting and fixing means are also feasible. For example, by providing a convex structure at the edge of the heat insulation substrate part of the adjusting device and a corresponding concave structure at the side of the air cooler, the heat insulation substrate part is fixedly attached to the working surface (windward side or leeward side) of the air cooler core through the snap-fit of the convex structure and the concave structure.

[0043] According to the present utility model, by setting the adjusting device 104, the effective heat exchange amount of the air cooler in the engine intake air cooling system can be changed, so as to adjust the engine intake air temperature. The adjustment methods of the adjusting device include adjusting the size of the heat insulation substrate part, the size and shape of the annular area provided by the seal, the position of the annular area relative to the air cooler core body, or the position of the heat insulation substrate part relative to the air cooler core body, etc. These adjustment methods can effectively adjust the engine intake air temperature, meet the intake air temperature requirements of different engines, reduce the types of engine intake air cooling systems, realize the generalization and modularization functions of the engine intake air cooling system, improve the interchangeability of components, and facilitate production and management. In addition, the adjusting device has a simple structure, is convenient to install and replace, and has a low cost.

[0044] The present utility model also provides a construction machinery, which includes an engine, an engine intake air cooling system, and an engine radiator arranged close to the air cooler of the engine intake air cooling system. Among them, the engine intake air cooling system is the engine intake air cooling system 100 according to the present utility model.

[0045] Although a road roller is taken as an example for illustration in this article, it can be understood that the cooling system of the present utility model is applicable to all construction machinery including an engine intake air cooling system.

[0046] In this article, the orientation words "upper", "lower", "top", "bottom", "vertical", "inner" and "outer" are only introduced for the convenience of describing the relative positions of the components when the engine intake air cooling system is placed in the manner shown. They should not be understood as restricting the layout of the engine intake air cooling system. The introduction of terms such as "first" and "second" is only for descriptive purposes and cannot be understood as indicating or implying relative importance. Figure 3 As shown.

[0047] Industrial applicability

[0048] For better understanding of the present utility model, the working principle and technical advantages of the engine intake air cooling system 100 of the present utility model are described below by taking the adjusting device shown in Figure 4 and Figure 5 as an example.

[0049] First, according to the working parameters of the current engine intake air cooling system and the working parameters of the engine used, determine the basic engine intake air temperature adjustment range. Thus, design the size of the heat insulation substrate part and the configuration of the annular area defined by the seal. The sizes of the mounting bracket and the mounting plate part are designed with sufficient mounting holes or bolt holes according to the installation and fixing requirements and adjustment requirements.

[0050] After the air cooler and the engine radiator are arranged side by side, the positional relationship between them is fixed. The heat insulation substrate part of the adjusting device is abutted against the air cooler core in a pre-designed manner, and at the same time, the bolt holes on the mounting plate part are ensured to be aligned with the bolt holes on the side of the air cooler core. Bolts are passed through the aligned bolt holes to basically fix the heat insulation substrate part of the adjusting device on the air cooler. Subsequently, the mounting holes on the first branch of the mounting bracket are aligned with the mounting holes on the heat insulation substrate part, and the mounting holes on the second branch of the mounting bracket are aligned with the mounting holes on the engine radiator. Fasteners are passed through the aligned mounting holes to thereby fix the entire adjusting device to the engine radiator.

[0051] When there is a need to adjust the engine intake air temperature, adjustment and adaptation are carried out by changing the position of the seal on the heat insulation substrate and the size of the formed annular region, the position of the heat insulation substrate part relative to the air cooler core, etc., so as to achieve the required engine intake air temperature.

[0052] The engine intake air cooling system according to the present utility model has a simple structure, the adjustment means of the adjusting device is easy to operate, the adjusting device shows stability and reliability during operation, can withstand high temperatures, and the service life can also be guaranteed.

[0053] The above only describes the exemplary embodiments of the engine intake air cooling system according to the present utility model for a road roller. It can be understood that the engine intake air cooling system according to the present utility model can be applied to other construction machinery, such as bulldozers, excavators, etc. The engine intake air cooling system according to the present utility model is not limited to the specific embodiments described here. The "one example", "another example", "example", etc. mentioned throughout the specification mean that a certain element / element related to the example (such as a feature, structure, and / or characteristic) is included in at least one of the examples described here, and may or may not appear in other examples. Additionally, it can be understood that multiple elements of any described example can be combined in any suitable manner in multiple different examples, unless the context clearly states otherwise.

[0054] The above schematic embodiments have clearly and completely described the present utility model. Those skilled in the art should understand that various other embodiments can be envisioned by modifying the disclosed technical solutions without departing from the spirit and scope of the present utility model. These embodiments should be understood to fall within the scope determined by the claims of the present utility model and any equivalent technical solutions thereof.

Claims

1. An engine intake air cooling system for construction machinery, including an air cooler, characterized in that, The engine intake air cooling system includes an adjustment device configured to adapt the effective heat exchange amount of the air cooler as needed. The adjustment device includes a heat insulation substrate portion, and the heat insulation substrate portion is positioned such that its first surface faces the windward side or the leeward side of the core of the air cooler, and the first surface abuts against the surface of the windward side or the leeward side of the core of the air cooler in a sealed manner in at least one annular region.

2. The engine intake air cooling system according to claim 1, wherein The sealed abutting surface of the first surface located in the annular region is provided by an elastic seal.

3. The engine intake air cooling system according to claim 2, wherein, At least one section of the seal is configured as a detachable sealing strip.

4. The engine intake air cooling system according to claim 3, wherein, The sealing strip is arranged on the heat insulation substrate portion by means of a glued connection.

5. The engine intake air cooling system according to claim 4, wherein, The adjustment device includes a mounting plate portion integrally extending from the heat insulation substrate portion, and the mounting plate portion is configured to fix the adjustment device to the air cooler.

6. The engine intake air cooling system according to any one of claims 1-5, characterized in that, The adjustment device includes a mounting bracket. The first branch of the mounting bracket is detachably mounted on the second surface side of the heat insulation substrate portion facing away from the air cooler, and the second branch of the mounting bracket is detachably mounted to the engine radiator of the construction machinery. The first branch and the second branch form an L-shaped bracket.

7. The engine intake air cooling system according to claim 6, characterized in that, The second branch extends in a direction away from the air cooler relative to the first branch.

8. The engine intake air cooling system according to claim 7, wherein, At least one set of mounting holes is provided on the first branch of the mounting bracket. Each set of mounting holes has three mounting holes distributed in a triangular pattern. At least one set of mounting holes is provided on the heat insulation substrate portion, and any set of mounting holes on the heat insulation substrate portion is configured to be able to match any set of mounting holes on the first branch of the mounting bracket.

9. An engineering machine, comprising an engine, an engine intake air cooling system, and an engine radiator arranged close to an air cooler of the engine intake air cooling system, characterized in that, The engine intake air cooling system is the engine intake air cooling system according to any one of claims 1-8.

10. The construction machinery according to claim 9, wherein, The construction machinery is a roller.

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