A wind deflector, heat dissipation system and engineering vehicle
By increasing the inner diameter of the fan ring on the air guide cover and configuring an adjustment ring, the problem of difficulty in adjusting the gap between the fan and the fan ring was solved, thereby improving fan performance and reducing noise, simplifying the production process, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CATERPILLAR INC
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-21
AI Technical Summary
In existing engineering vehicle cooling systems, the gap between the fan and the fan ring is difficult to meet the size and uniformity requirements, resulting in decreased fan performance and increased noise. Existing adjustment methods are time-consuming or may affect fan performance.
Design an air guide shroud that increases the inner diameter of the air ring and adds an adjustment ring to replace the original air ring. The adjustment ring forms a reasonable gap with the fan blade tip, and a strip hole is made on the adjustment ring to fit with the shroud, so as to achieve fine adjustment and uniform adjustment of the gap.
It simplifies the adjustment process of the gap between the fan and the fan ring, improves fan performance, reduces noise, reduces production costs and time, and improves production efficiency.
Smart Images
Figure CN224528430U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of engineering machinery technology, and relates to a heat dissipation system for engineering vehicles, specifically, a heat dissipation shroud for a heat dissipation system. Background Technology
[0002] Existing engineering vehicles are typically equipped with cooling systems to dissipate heat from the vehicle's powertrain, ensuring safe and reliable operation. Some current cooling systems, such as... Figure 1 As shown, the main components include a cooling module 10, an air guide shroud 11, and a fan 13. The cooling module 10 is fixed to the vehicle frame 30 via a cooling module mounting bracket 14. The air guide shroud 11 is mounted on the cooling module 10 and has a circular opening, called a fan ring 12. The fan 13 is positioned within the fan ring 12. The engine 20 drives the fan 13 to rotate, creating airflow on the surface of the cooling module 10, thereby carrying away the heat generated by the cooling module 10 and achieving heat dissipation.
[0003] Since the fan 13 is mounted on the output shaft or pulley of the engine 20, and the engine 20 is mounted on the engine bracket 22 on the frame 30 via the engine bracket 21, the mounting positions of the engine 20 and the cooling module 10 on the frame 30 are relatively fixed. This also results in a basically fixed relative position between the fan 13 and the fan shroud 12. Because a sufficient safety clearance 15 needs to be maintained between the blade tip of the fan 13 and the fan shroud 12 when the fan 13 rotates, combined with… Figure 1 , Figure 2 As shown, the gap 15 should not be too large to avoid affecting fan performance. Theoretically, the gap 15 should be set at around 20mm, and the gap 15 should be uniform around the circumference to reduce wind noise. However, both the cooling module mounting bracket 14 and the engine bracket 22 are fixed to the vehicle frame 30 by welding. During welding, the welding angle will inevitably change slightly, making it difficult to guarantee the height difference and parallelism between the cooling module mounting bracket 14 and the engine bracket 22. Consequently, the gap 15 between the blade tip of the fan 13 and the fan ring 12 cannot meet the requirements in terms of size and uniformity.
[0004] To address the above problems, existing solutions mainly include the following:
[0005] Firstly, the cooling module mounting bracket 14 and engine bracket 22 on the chassis 30 are re-welded to resolve the height difference and parallelism issues between them, so that the gap 15 between the blade tip of the fan 13 and the fan ring 12 meets the design requirements. However, this method involves a large amount of work, is time-consuming, and will seriously affect the production cycle and increase costs.
[0006] Secondly, loosen the fastening bolts on the air guide shroud 11, adjust the installation position of the air guide shroud 11 on the cooling module 10, and then adjust the position of the fan ring 12 to leave a suitable safety clearance 15 between the fan ring 12 and the blade tip of the fan 13. However, the position and diameter of the air shroud holes on the existing cooling module 10 are fixed. If the installation position of the air guide shroud 11 is adjusted, it may be necessary to enlarge the air shroud holes, which is inconvenient and time-consuming.
[0007] Third, the air guide shroud 11 is polished to enlarge the inner diameter of the air guide shroud 12 until a reasonable gap 15 is formed with the blade tip of the fan 13. However, this method will cause changes in the roundness of the air guide shroud 12, which will have varying degrees of impact on fan performance and vehicle noise. Summary of the Invention
[0008] In order to solve at least one of the above-mentioned technical problems in the prior art, this utility model proposes an air guide cover that can conveniently and quickly adjust the relative position between the air ring and the fan blade tip to form a reasonable gap between them.
[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0010] In one aspect, this utility model proposes an air guide cover, comprising:
[0011] The cover has a circular air ring, inside which the fan blades are mounted. The difference between the inner diameter of the air ring and the outer diameter of the fan blades is greater than 2M, where M is the width of the required safety clearance between the air ring and the tip of the fan blades. Mounting holes are provided around the outer periphery of the air ring on the cover.
[0012] The adjusting ring is annular, and the difference between its inner diameter and the outer diameter of the fan blade is equal to 2M. Its outer diameter is larger than the inner diameter of the fan ring. A strip-shaped hole is opened on the annular surface of the adjusting ring.
[0013] Fasteners are installed in the strip-shaped holes of the adjusting ring and the mounting holes of the cover, so as to install the adjusting ring on the cover and cover the air ring.
[0014] In some embodiments of this application, multiple pairs of strip holes can be opened on the annular surface of the adjustment ring, and each pair of strip holes is located on the same meridian of the adjustment ring and placed on opposite sides of the center. The length direction of each pair of strip holes is basically consistent with the meridian direction. This allows the gap between the fan blade tip and the adjustment ring to be adjusted in multiple directions, so as to achieve the purpose of adjusting the circumferential uniformity of the gap and reducing wind noise.
[0015] In some embodiments of this application, multiple mounting holes can be formed on the housing. These mounting holes are configured as elongated holes, with their length direction substantially perpendicular to the meridian direction of the wind ring at the location of the mounting hole. The number and position of the mounting holes on the housing correspond to the number and position of the elongated holes on the adjusting ring. In this way, when fine-tuning the installation position of the adjusting ring on the housing, each elongated hole on the adjusting ring can match the corresponding mounting hole on the housing and can be connected by fasteners, thereby ensuring the stability of the adjusting ring installed on the housing.
[0016] In some embodiments of this application, the adjustment ring can be designed as a sheet, and is composed of multiple arc segments of the same shape and size spliced together. Matching splicing structures are provided at both ends of each arc segment, and the adjustment ring is formed by splicing multiple arc segments end-to-end. With this structural design, when a break occurs on the adjustment ring, only the broken arc segment needs to be replaced, while the other arc segments can continue to be used, thereby improving material utilization and reducing costs.
[0017] In some embodiments of this application, the splicing structure can be designed to include a trapezoidal groove and a trapezoidal protrusion, with the bottom width of the trapezoidal groove being greater than the opening width; correspondingly, the trapezoidal protrusion is configured to gradually widen in its protruding direction. This splicing structure can prevent adjacent arc-shaped segments from easily detaching after splicing.
[0018] In some embodiments of this application, the adjusting ring can be designed to be composed of four arc-shaped segments of the same shape and size, with at least three slotted holes on each arc-shaped segment. Two of these slotted holes are adjacent to the beginning and end of the arc-shaped segment, while the third slotted hole is centrally located. This allows the position of the adjusting ring to be adjusted in at least eight directions (e.g., up, down, left, right, upper left, lower left, upper right, and lower right), ensuring a uniform gap between the adjusting ring and the fan blade tip. Furthermore, configuring each arc-shaped segment with at least three fixed points improves the stability of each segment's installation on the housing.
[0019] In some embodiments of this application, in order to improve the material utilization rate of the cover, the cover can be designed to be spliced together from multiple sub-covers of the same shape and size, and matching splicing and riveting structures can be provided at the beginning and end of each sub-cover.
[0020] In some embodiments of this application, the housing may be designed to include four side panels and a front panel. The front panel is mounted on the front edge of the four side panels, and the fan ring is formed on the front panel. The rear edges of the four side panels are turned outward to form outward flanges for mounting the housing onto the cooling module. Matching splicing structures can be provided at both ends of the front panel of each sub-housing unit to achieve accurate positioning between adjacent sub-housing units. Matching riveting structures can be provided at both ends of the side panels of each sub-housing unit to achieve a stable connection between adjacent sub-housing units.
[0021] In another aspect, this utility model also proposes a heat dissipation system, including a cooling module, a fan, and an engine for driving the fan to rotate; an air guide shroud is installed on the cooling module, the air guide shroud comprising:
[0022] The cover has a circular air ring, and the fan blades are arranged inside the air ring. The difference between the inner diameter of the air ring and the outer diameter of the fan blades is greater than 2M, where M is the width of the safety clearance required between the air ring and the tip of the fan blades. Mounting holes are provided around the outer periphery of the air ring on the cover.
[0023] The adjusting ring is annular, and the difference between its inner diameter and the outer diameter of the fan blade is equal to 2M. Its outer diameter is larger than the inner diameter of the fan ring. A strip-shaped hole is opened on the annular surface of the adjusting ring.
[0024] Fasteners are installed in the strip-shaped holes of the adjusting ring and the mounting holes of the cover, thereby installing the adjusting ring on the cover and blocking the wind ring, so that the fan blades are positioned in the inner ring of the adjusting ring.
[0025] In another aspect, this utility model also proposes an engineering vehicle, including a chassis and a cooling system; an engine mount and a cooling module mount are mounted on the chassis; the cooling system includes a cooling module, a fan, and an engine that drives the fan to rotate; wherein the cooling module is mounted on the cooling module mount; an engine bracket is mounted on the bottom of the engine, and the engine bracket is mounted in the engine mount; an air guide shroud is mounted on the cooling module, the air guide shroud comprising:
[0026] The cover has a circular air ring, and the fan blades are arranged inside the air ring. The difference between the inner diameter of the air ring and the outer diameter of the fan blades is greater than 2M, where M is the width of the safety clearance required between the air ring and the tip of the fan blades. Mounting holes are provided around the outer periphery of the air ring on the cover.
[0027] The adjusting ring is annular, and the difference between its inner diameter and the outer diameter of the fan blade is equal to 2M. Its outer diameter is larger than the inner diameter of the fan ring. A strip-shaped hole is opened on the annular surface of the adjusting ring.
[0028] Fasteners are installed in the strip-shaped holes of the adjusting ring and the mounting holes of the cover, thereby installing the adjusting ring on the cover and blocking the wind ring, so that the fan blades are positioned in the inner ring of the adjusting ring.
[0029] Compared with the prior art, the advantages and positive effects of this utility model are mainly reflected in:
[0030] 1. This utility model increases the inner diameter of the fan ring on the air guide cover and installs an adjusting ring at the fan ring position. The inner diameter of the adjusting ring is the same as that of the original fan ring. The adjusting ring replaces the original fan ring and forms a mating relationship with the fan blades. Therefore, by fine-tuning the installation position of the adjusting ring on the air guide cover, the gap width and circumferential uniformity of the gap between the fan blade tip and the inner ring of the adjusting ring can be changed, thereby improving fan performance and reducing noise. This method is simple to operate, low in cost, maintains the roundness of the fan ring and the adjusting ring, and provides a suitable safe clearance for fan rotation.
[0031] 2. This utility model uses a splicing design that divides the adjustment ring into multiple segments and configures them with the same splicing structure. As a result, when a break occurs on the adjustment ring, only the broken arc segment needs to be replaced, while the other arc segments can continue to be used. Compared with cutting the whole circle, this can improve the utilization rate of raw materials and reduce costs.
[0032] 3. The air guide cover of this utility model is installed in the heat dissipation system of the engineering vehicle, specifically on the cooling module of the heat dissipation system. This can reduce the requirements for the height difference and parallelism of the cooling module mounting base and the engine bracket mounting base on the vehicle frame, thereby reducing working time and improving production efficiency.
[0033] After reading the detailed embodiments of this utility model in conjunction with the accompanying drawings, other features and advantages of this utility model will become clearer. Attached Figure Description
[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.
[0035] Figure 1 This is a schematic diagram showing the positional relationships between the main components of the cooling system mounted on the chassis.
[0036] Figure 2 yes Figure 1 A schematic diagram showing the relative positional relationship between the fan and the air ring on the air guide cover;
[0037] Figure 3 This is a schematic diagram of the structure of one embodiment of the air guide cover proposed in this utility model;
[0038] Figure 4 yes Figure 3 A schematic diagram of the overall structure of one embodiment of the adjustment ring;
[0039] Figure 5 It is formed by splicing. Figure 4 A schematic diagram of one embodiment of each arc segment of the adjustment ring shown;
[0040] Figure 6 yes Figure 5 A schematic diagram of the splicing structure of the arc-shaped segment shown;
[0041] Figure 7 This is a schematic diagram of the structure of one embodiment of the air guide cover;
[0042] Figure 8 yes Figure 7 A schematic diagram of one embodiment of the splicing and riveting structure used in the cover shown;
[0043] Figure 9 This is a schematic diagram of the relative positions of an embodiment where a mismatch occurs in the gap between the fan blade tip and the adjusting ring;
[0044] Figure 10 This is a schematic diagram showing the relative positions of the fan blade tip and the adjusting ring when the gap is adjusted to a circumferentially uniform safe gap.
[0045] In the diagram, 10 is the cooling module; 11 is the air guide shroud; 12 is the fan ring; 13 is the fan; 14 is the cooling module mounting base; 15 is the clearance; 20 is the engine; 21 is the engine bracket; 22 is the engine bracket seat; 30 is the frame; 100 is the air guide shroud; 110 is the cover; 111 is the four side panels; 112 is the front panel; 113 is the outward flange; 114 is the screw hole; 115 is the mounting hole; 116-119 are the sub-covers; 120 is the fan ring; 130 is the splicing structure; 140 is the riveting structure; 141 is the riveting hole; 150 is the adjusting ring; 151 is the strip hole; 152-155 are the arc-shaped segments; 160 is the splicing structure; 161 is the trapezoidal groove; and 162 is the trapezoidal protrusion. Detailed Implementation
[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0047] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "upper left", "lower left", "upper right", "lower right", "inner", "outer", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or internal communication within components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.
[0049] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0050] To facilitate a more convenient and rapid adjustment of the safety clearance between the air ring and the fan blade tip, this embodiment improves the structure of the air guide shroud that forms the air ring. By increasing the size of the original air ring on the air guide shroud and configuring an adjustment ring on the enlarged air ring, the original air ring can be replaced by the adjustment ring, thereby enabling free adjustment of the air ring position.
[0051] like Figure 3 As shown, the air guide cover 100 in this embodiment is mainly composed of key components such as the cover 110, the adjusting ring 150, and fasteners.
[0052] The casing 110 can be designed as an open box structure, combined with... Figure 3 , Figure 7 As shown, the device includes four side panels 111 and a front panel 112. The front panel 112 is mounted on the front edge of the side panels 111, meaning it is located in front of the side panels 111. The outer periphery of the front panel 112 is welded to the front edge of the side panels 111 to form a single unit. The rear edge of the side panels 111 is folded outwards to form an outer flange 113. Screw holes 114 can be provided on the outer flange 113 for mounting the housing 110 onto other components, such as the cooling module of a heat dissipation system.
[0053] The cover 110 in this embodiment can be designed as square or round, depending on the actual needs. This embodiment does not impose any specific restrictions on this.
[0054] A circular fan ring 120 is formed on the front panel 112 of the housing 110, and the inner diameter D of the fan ring 120 is configured to be larger than the inner diameter of the original fan ring. That is, the difference between the inner diameter D of the fan ring 120 and the outer diameter of the fan blades is greater than 2M, where M is the width of the required safety clearance between the fan ring and the fan blade tip. In other words, when the fan blades are positioned in the inner ring 120 in a concentric arrangement, the width of the gap formed between the fan blade tip and the fan ring 120 should be greater than the width M of the safety clearance required for fan rotation.
[0055] Because the gap between the fan blade tip and the fan ring 120 is too large, it will reduce fan performance. Therefore, in this embodiment, an adjustment ring 150 is designed to be installed on the front panel 112 of the housing 110, corresponding to the position of the fan ring 120. The adjustment ring 150 is configured as a ring, such as... Figure 4 As shown, the inner diameter d of the annular adjusting ring 150 is specifically configured to be equal to the inner diameter of the original fan ring, that is, the difference between the inner diameter d of the adjusting ring 150 and the outer diameter of the fan blade is equal to 2M. The outer diameter of the annular adjusting ring 150 is configured to be larger than the inner diameter D of the fan ring 120. This allows the adjusting ring 150 to be mounted on the front panel 112 of the housing 110, thus shielding the fan ring 120 with its increased inner diameter. The fan blades are positioned within the adjusting ring 150, using the adjusting ring 150 to replace the original fan ring, forming a safety gap of width M between the adjusting ring 150 and the fan blade tip to meet the design requirements for fan performance and noise levels.
[0056] In order to adjust the specific installation position of the adjusting ring 150 on the housing 110, so that the center of the adjusting ring 150 coincides with the fan blade axis, and thus ensures that the width of the gap formed between the adjusting ring 150 and the fan blade tip is uniform and equal to the safety gap M, this embodiment has multiple strip-shaped holes 151 formed on the annular surface of the adjusting ring 150, such as... Figure 4 As shown, on the front panel 120 of the cover 110, a plurality of mounting holes 115 are opened around the outer periphery of the wind ring 120, corresponding to the opening positions of the strip holes 151 on the adjustment ring 150. By using the cooperation of the strip holes 151 and the mounting holes 115, and by using fasteners for connection, the adjustment ring 150 can be installed on the cover 110 and the installation position can be finely adjusted.
[0057] In some embodiments, the slotted holes 151 are preferably provided in pairs, and each pair of slotted holes 151 is preferably located on the same meridian of the adjusting ring 150, and positioned on opposite sides of the center of the adjusting ring 150. Furthermore, the longitudinal direction of each pair of slotted holes 151 is substantially consistent with the meridian direction of the adjusting ring 150 at its location.
[0058] Correspondingly, the mounting holes 115 are also elongated and are provided in pairs on the front panel 112 of the housing 110. Each pair of mounting holes 115 is preferably located on the same meridian of the wind ring 120 and placed on opposite sides of the center of the wind ring 120. In addition, the length direction of each pair of mounting holes 115 is basically perpendicular to the meridian direction of the wind ring 120 at its location, that is, basically consistent with the tangent direction of the wind ring 120 at that location. In this way, after fine-tuning the installation position of the adjusting ring 150, the mounting holes 115 and the elongated holes 151 at the corresponding positions can still partially overlap. After installing fasteners (such as elastic clips), the adjusting ring 150 is fixed at multiple points on the housing 110 to ensure the stability of the adjusting ring 150 on the housing 110.
[0059] In some embodiments, the mounting hole 115 and the elongated hole 151 can be designed as oval shapes and distributed on the outer periphery of the wind ring 120 and the upper, lower, left, right, upper left, lower left, upper right, and lower right positions of the annular surface of the adjusting ring 150, so that the adjusting ring 150 can be finely adjusted in at least these eight directions to determine its specific mounting position.
[0060] In some embodiments, the adjusting ring 150 can be formed as a whole in a sheet shape. To save materials and reduce costs, the adjusting ring 150 can be divided into multiple segments, that is, multiple arc-shaped segments 152, 153, 154, 155, etc., with the same shape and size, such as... Figure 5 As shown, a matching splicing structure 160 is set at both ends of each arc segment, as follows: Figure 6 As shown, the adjustment ring 150 can be formed by splicing. This way, when the adjustment ring 150 is damaged, only one or two arc-shaped segments need to be replaced according to the damaged location, while the remaining arc-shaped segments can still be used. Compared to the conventional method of cutting whole circles, this greatly improves the utilization rate of raw materials and reduces costs. Furthermore, when adjusting the gap between the inner ring of the adjustment ring 150 and the fan blade tip, the spliced structure design avoids adjustment difficulties caused by scattered components, maintaining the roundness of the entire spliced part and the consistency during adjustment.
[0061] Figure 4 , Figure 5 The diagram illustrates the use of four arc-shaped segments 152, 153, 154, and 155 to form an adjusting ring 150. The four segments 152, 153, 154, and 155 have the same radius and a central angle of 90°. The splicing structure 160 uses a trapezoidal groove 161 and a trapezoidal protrusion 162. A trapezoidal groove 161 is formed at the beginning of each arc-shaped segment, and a trapezoidal protrusion 162 is formed at the end. The trapezoidal protrusion 162 at the end of the preceding arc-shaped segment 152 is inserted into the trapezoidal groove 161 at the beginning of the following arc-shaped segment 153. Figure 6As shown, this allows the two arc-shaped segments 152 and 153 to be joined together. The other two arc-shaped segments 154 and 155 can be joined in the same way to form a complete circular adjustment ring 150.
[0062] To ensure a secure connection, the bottom width of the trapezoidal groove 161 can be designed to be greater than its opening width. The trapezoidal protrusion 162 protrudes gradually from the tail end of the arc segment away from the tail end, forming a trapezoid. Specifically, the shorter top edge of the trapezoid connects to the tail end of the arc segment and mates with the opening of the trapezoidal groove 161, while the longer bottom edge of the trapezoid, away from the tail end of the arc segment, mates with the bottom of the trapezoidal groove 161. This splicing structure prevents the trapezoidal protrusion 162 from detaching from the trapezoidal groove 161 after splicing, thus forming a stable, fully circular adjusting ring 150, simplifying the subsequent installation of the adjusting ring 150 on the cover 110.
[0063] To improve the stability of each curved segment on the housing 110, at least three slotted holes 151 can be made on each curved segment, such as... Figure 5 As shown. Two of the strip holes 151 are respectively made at the beginning and end of the arc segment, and the other strip hole 151 is made at the middle of the arc segment. The three-point fixing method can make the installation of each arc segment on the cover 110 more stable.
[0064] Simultaneously, by adopting this opening method, adjusting the strip holes 151 at both ends of the four arc segments 152, 153, 154, and 155 to the 3 o'clock, 6 o'clock, 9 o'clock, and 12 o'clock positions respectively, the central strip hole 151 on the four arc segments 152, 153, 154, and 155 will be located at the upper left, lower left, upper right, and lower right positions of the entire circle, respectively. Figure 4 As shown in the positional relationship, the position of the adjustment ring 150 can be finely adjusted in eight directions: up, down, left, right, upper left, lower left, upper right, and lower right, to meet the adjustment requirements of various mismatch gaps.
[0065] To improve the material utilization rate of the housing 110, in some embodiments, the housing 110 can be divided into multiple equal parts, for example... Figure 7 The four sub-shells 116-119 shown are identical in shape and size, and each sub-shell has a matching splicing structure 130 and a riveting structure 140 at both ends, as shown. Figure 8 As shown, multiple sub-shells 116-119 are then spliced together to form the shell 110. In this way, if the shell 110 is damaged, only one or two sub-shells need to be replaced according to the damaged location, while the remaining shells can still be used. Compared with the traditional one-piece design, this can greatly improve the utilization rate of raw materials and reduce costs.
[0066] In some embodiments, the splicing structure 130 may also take the form of a trapezoidal groove and a trapezoidal protrusion, and the specific shape and splicing method can imitate the splicing structure 160 used on the adjusting ring 150. The splicing structure 130 is set at both ends of the front panel 112 of each sub-cover, such as... Figure 8 As shown, the riveting structure 140 can be set at both ends of the side plate of each sub-cover, for example, one or more riveting holes 141 can be opened at both ends of the side plate of each sub-cover. When assembling the cover 110, the sub-covers 116-119 are first spliced end to end by the splicing structure 130 to ensure the roundness of the wind ring 120 and to make it easier to accurately position each sub-cover. Then, the riveting holes 141 on adjacent sub-covers are riveted together by the connecting plate to form a stable whole cover.
[0067] Industrial applicability
[0068] The following description will take the application of the air guide cover of this embodiment to the heat dissipation system of an engineering vehicle as an example.
[0069] like Figure 1 As shown, this embodiment installs a cooling system on the chassis 30 of the engineering vehicle. The cooling system mainly includes key components such as a cooling module 10, an air guide 100, a fan 13, and an engine 20. The air guide 100 is mounted on the cooling module 10, which is mounted on the chassis 30 via a cooling module mounting bracket 14. The fan 13 is mounted on the output shaft or pulley of the engine 20 and is driven to rotate by the engine 20. An engine bracket 21 is mounted on the bottom of the engine 20, and the engine bracket 21 is mounted in an engine bracket seat 22 on the chassis 30. Since the engine bracket seat 22 and the cooling module mounting bracket 14 are installed on the chassis 30 before the engine 20 and the cooling module 10, once the engine bracket seat 22 and the cooling module mounting bracket 14 are installed on the chassis 30, the height difference and parallelism between them are determined, thus determining the relative position between the fan 13 and the air guide 100.
[0070] When welding the engine mount 22 and cooling module mounting bracket 14 to the frame 30, the welding angle can easily change. Consequently, when the fan blades of the fan 13 are positioned within the inner ring of the adjusting ring 150 of the air guide shroud 100, a mismatch can easily occur between the blade tip of the fan 13 and the inner ring of the adjusting ring 150. Figure 9 As shown, situations such as a large upper gap (gap width m1 is greater than the safety gap width M) and a small lower gap (gap width m2 is less than the safety gap width M) can lead to a decrease in fan performance and an increase in overall vehicle noise.
[0071] To ensure fan performance and reduce overall machine noise, the fasteners on the adjusting ring 150 (not shown in the figure) can be loosened, and the adjusting ring 150 can be moved down a certain distance to reduce the upper gap between the fan blade tip 13 and the inner ring of the adjusting ring 150, while increasing the lower gap between the fan blade tip 13 and the inner ring of the adjusting ring 150, until the gap formed by the fan blade tip 13 and the inner ring of the adjusting ring 150 is uniform and approximately equal to the width M of the safety gap. Figure 10 As shown. Since the adjusting ring 150 has a strip-shaped hole 151 and the mounting hole 115 on the cover 110 is also a long strip-shaped hole, and the length direction of the strip-shaped hole 151 and the mounting hole 115 are perpendicular, after the position of the adjusting ring 150 is finely adjusted, the strip-shaped hole 151 and the mounting hole 115 can still maintain partial overlap. Fasteners are installed in the strip-shaped hole 151 and the mounting hole 115 to fix the adjusting ring 150 on the cover 110 and position it in the adjusted position.
[0072] The air guide shroud 100 of this embodiment can adjust the gap between the air ring and the fan blade by changing the position of the adjusting ring 150. Compared with traditional gap adjustment methods such as removing the mounting base on the frame or grinding the air guide shroud air ring, the operation is simpler and the adjustment process is faster and more efficient.
[0073] Of course, the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.
Claims
1. An air guide shroud, characterized in that, include: The cover has a circular air ring, inside which the fan blades are mounted. The difference between the inner diameter of the air ring and the outer diameter of the fan blades is greater than 2M, where M is the width of the required safety clearance between the air ring and the tip of the fan blades. Mounting holes are provided around the outer periphery of the air ring on the cover. The adjusting ring is annular, and the difference between its inner diameter and the outer diameter of the fan blade is equal to 2M. Its outer diameter is larger than the inner diameter of the fan ring. A strip-shaped hole is opened on the annular surface of the adjusting ring. Fasteners are installed in the strip-shaped holes of the adjusting ring and the mounting holes of the cover, so as to install the adjusting ring on the cover and cover the air ring.
2. The air guide shroud according to claim 1, characterized in that, Multiple pairs of strip holes are formed on the annular surface of the adjustment ring. Each pair of strip holes is located on the same meridian of the adjustment ring and is placed on opposite sides of the center. The length direction of each pair of strip holes is consistent with the direction of the meridian they are located on.
3. The air guide shroud according to claim 2, characterized in that, The mounting holes on the cover are elongated holes, with their length direction perpendicular to the meridian direction of the wind ring at the location of the mounting hole. The number and position of the mounting holes correspond to the number and position of the elongated holes on the adjusting ring.
4. The air guide shroud according to any one of claims 1 to 3, characterized in that, The adjustment ring is sheet-shaped and is made up of multiple arc segments of the same shape and size spliced together. Each arc segment has a matching splicing structure at both ends.
5. The air guide shroud according to claim 4, characterized in that, The splicing structure includes a trapezoidal groove and a trapezoidal protrusion. The bottom width of the trapezoidal groove is greater than the opening width, and the trapezoidal protrusion gradually widens in its protruding direction.
6. The air guide shroud according to claim 4, characterized in that, The adjustment ring is composed of four arc-shaped segments of the same shape and size spliced together. Each arc-shaped segment has at least three strip holes, two of which are adjacent to the beginning and end of the arc-shaped segment, and the other strip hole is located in the center.
7. The air guide shroud according to any one of claims 1 to 3, characterized in that, The cover is composed of multiple sub-covers of the same shape and size, with matching splicing and riveting structures at both ends of each sub-cover.
8. The air guide shroud according to claim 7, characterized in that, The housing includes four side panels and a front panel. The front panel is installed on the front edge of the four side panels and the air shroud is provided on the front panel. The rear edges of the four side panels are turned outward to form outward flanges, which are used to connect the cooling module. Each of the sub-shells has a matching splicing structure at both ends of its front panel and a matching riveting structure at both ends of its side panel.
9. A heat dissipation system, comprising a cooling module, a fan, and an engine for driving the fan to rotate; characterized in that, An air guide shroud as described in any one of claims 1 to 8 is installed on the cooling module, and the fan blades are positioned in the inner ring of the adjusting ring of the air guide shroud.
10. An engineering vehicle, comprising a frame, characterized in that, The heat dissipation system as described in claim 9 is installed on the vehicle frame; An engine mount is mounted on the vehicle frame, and an engine bracket is mounted on the bottom of the engine, with the engine bracket installed in the engine mount. A cooling module mounting bracket is installed on the vehicle frame, and the cooling module is mounted on the cooling module mounting bracket.