Cooling fan, fan cooling structure and engineering machinery

Abstract

The utility model discloses a heat dissipation fan, fan heat dissipation structure and engineering machinery, the heat dissipation fan comprises a central disc, a connecting ring and a plurality of connecting beams, the central disc is arranged in the connecting ring, the edge of the central disc is connected with the edge of the connecting ring through the plurality of connecting beams, and the connecting beams are arranged on the central disc. The connecting beams are sequentially distributed in the circumferential direction of the center disc. A plurality of first fan blades are arranged between the center disc and the inner ring of the connecting ring, the first fan blades are sequentially distributed in the circumferential direction of the center disc, a plurality of second fan blades are arranged on the outer ring of the connecting ring, and the second fan blades are sequentially distributed in the circumferential direction of the connecting ring. The radiator is reasonable in structural design, the wind speed near the surface center of the radiator in the area right opposite to the axis of the radiating fan is obviously increased, the surface utilization rate of the radiator is obviously increased, and the wind field uniformity of the surface of the radiator is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering machinery technical field especially relates to a heat dissipation fan, fan heat dissipation structure and engineering machinery. BACKGROUND

[0002] The existing loader heat dissipation system mainly comprises radiator assembly (intercooler, water radiator, hydraulic oil radiator, torque converter oil radiator), heat dissipation pipeline, auxiliary water tank, cooling fan and the like, and mainly utilizes the air forced convection provided by the rotating cooling fan to exchange heat. Among them, the intercooler is used for heat dissipation of high-temperature gas after heating by the turbine, so that the engine inlet air temperature reaches the appropriate temperature; the water radiator is used for heat dissipation of the cooling water after heating by the engine; the hydraulic oil radiator and the torque converter oil radiator are respectively used for heat dissipation of the heated hydraulic oil and the torque converter oil. The air inlet efficiency of the heat dissipation system and the uniformity of the wind field on the surface of the radiator directly affect the heat dissipation efficiency of the heat dissipation system.

[0003] The existing loader heat dissipation system mainly comprises radiator assembly (intercooler, water radiator, hydraulic oil radiator, torque converter oil radiator), heat dissipation pipeline, auxiliary water tank, cooling fan and the like, and mainly utilizes the air forced convection provided by the rotating cooling fan to exchange heat. Among them, the intercooler is used for heat dissipation of high-temperature gas after heating by the turbine, so that the engine inlet air temperature reaches the appropriate temperature; the water radiator is used for heat dissipation of the cooling water after heating by the engine; the hydraulic oil radiator and the torque converter oil radiator are respectively used for heat dissipation of the heated hydraulic oil and the torque converter oil. The air inlet efficiency of the heat dissipation system and the uniformity of the wind field on the surface of the radiator directly affect the heat dissipation efficiency of the heat dissipation system. SUMMARY

[0004] The utility model discloses a kind of heat dissipation fan, fan heat dissipation structure and engineering machinery to solve the technical problems that radiator heat dissipation area utilization rate is lower and the uniformity of the wind field on the surface of radiator is poor in prior art.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the utility model provides a heat dissipation fan, which comprises a center disc, a connecting ring and a connecting beam. The center disc is arranged inside the connecting ring. The edge of the center disc is connected to the edge of the connecting ring through a plurality of connecting beams. The connecting beams are distributed around the circumference of the center disc. A plurality of first fan blades are arranged between the center disc and the inner ring of the connecting ring. The first fan blades are distributed around the circumference of the center disc. The outer ring of the connecting ring is provided with a plurality of second fan blades. The second fan blades are distributed around the circumference of the connecting ring.

[0006] Further, the connecting beams are located on the side of the center disc, the connecting ring and the first fan blades away from the radiator. The two ends of the connecting beam are connected to the edge of the center disc and the edge of the connecting ring respectively through bending.

[0007] Further, the connecting beams are staggered with the first vanes in the circumferential direction of the center disc.

[0008] Further, the center disc is provided with fan mounting holes at the edge of the side end face away from the radiator, and the connecting beams are staggered with the fan mounting holes in the circumferential direction of the center disc.

[0009] Further, the center disc is a center disc, and the diameter d of the center disc is 100mm≤d≤150mm, and the connecting ring is a connecting ring.

[0010] Further, the vane angle of the first vane is 35°≤vane angle≤58°, and the vane angle of the second vane is 35°≤vane angle≤58°.

[0011] Further, the vane shape of the first vane is a sickle type, and the vane shape of the second vane is a sickle type; the diameter of the first vane is 240mm≤diameter≤300mm, and the diameter of the second vane is 772mm±30mm.

[0012] Further, the edge of the center disc is axially and equiangularly provided with seven first vanes, the outer ring of the connecting ring is axially and equiangularly provided with seven second vanes, and the number of the connecting beams is seven.

[0013] The utility model also provides a fan heat dissipation structure, including radiator, be equipped with the wind scooper on the radiator, the inside of wind scooper is equipped with the heat dissipation fan of above-mentioned any one technical scheme;The bottom of radiator is equipped with mounting bracket, the heat dissipation fan with radiator radiator core body opposite setting.

[0014] The utility model also provides an engineering machinery, including engineering machinery body, still include above-mentioned any one technical scheme heat dissipation fan, or above-mentioned technical scheme fan heat dissipation structure, heat dissipation fan or fan heat dissipation structure set up on engineering machinery body.

[0015] In summary, the technical scheme of the utility model has the beneficial effects as follows: the utility model has reasonable structure design, (1) the central disc is arranged inside the connecting ring, the edges of the central disc and the edges of the connecting ring are connected through the connecting beams, and the connecting beams are distributed around the circumferential direction of the central disc; thus, the connecting beams can be used to realize the stable connection between the central disc and the connecting ring. (2) the first fan blades are arranged between the central disc and the inner ring of the connecting ring, the first fan blades are distributed around the circumferential direction of the central disc, the second fan blades are arranged on the outer ring of the connecting ring, and the second fan blades are distributed around the circumferential direction of the connecting ring; thus, when the radiator is matched with the heat dissipation fan, the air forced convection provided by the rotation of the first fan blades can realize the heat exchange between the radiator and the area directly opposite to the axial line of the heat dissipation fan, and the air forced convection provided by the rotation of the second fan blades can realize the heat exchange between the radiator and the area directly opposite to the axial line of the heat dissipation fan. According to the above analysis, the heat dissipation fan is designed as coaxial double fans (i.e. the first fan blades of the inner ring and the second fan blades of the outer ring), the wind speed near the center of the surface of the radiator in the area directly opposite to the axial line of the heat dissipation fan is obviously improved, the utilization rate of the surface of the radiator is obviously improved, the wind field uniformity of the surface of the radiator is obviously improved, and after being matched with the heat dissipation fan, the radiator can be appropriately thinned, which is beneficial to cost reduction. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a three-dimensional structure schematic view of the fan heat dissipation structure of the utility model;

[0017] Figure 2 is a structure schematic view of the fan heat dissipation structure of the utility model;

[0018] Figure 3 is a structure schematic view of the heat dissipation fan of the utility model;

[0019] Figure 4 is a three-dimensional structure schematic view of the heat dissipation fan of the utility model;

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] Radiator core body (101); central disc (301), connecting ring (302), connecting beam (303), first fan blade (304), second fan blade (305), fan mounting hole (306). DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, but does not constitute the limitation on the protection scope of the utility model.

[0023] In the utility model, in order to describe more clearly, make the following description: the observer faces the attached Figure 1 Observation, the upper surface of the observer is set as upper, the lower surface of the observer is set as lower, it should be indicated that the terms "front end", "rear end", "left side" "right side", "middle part", "upper", "lower" in the text indicate the orientation or positional relationship based on the orientation or positional relationship of the attached drawing, only for the convenience of clearly describing the utility model, and not indicate or imply that the structure or part indicated must have a particular orientation, be constructed with a particular orientation, therefore can not be understood as the limitation of the utility model. In addition, the terms "first", "second", "third", "fourth" are only for the purpose of clarity or simplification of description, and can not be understood as indicating or implying relative importance or quantity.

[0024] Referring to Figures 1 to 4 The embodiment provides a heat dissipation fan, and the heat dissipation fan 3 comprises a center disc 301, a connecting ring 302 and a connecting beam 303, the center disc 301 is arranged in the inner part of the connecting ring 302, the edge of the center disc 301 and the edge of the connecting ring 302 are connected through a plurality of connecting beams 303, and the plurality of connecting beams 303 are sequentially distributed around the circumferential direction of the center disc 301; a plurality of first fan blades 304 are arranged between the center disc 301 and the inner ring of the connecting ring 302, the plurality of first fan blades 304 are sequentially distributed around the circumferential direction of the center disc 301, and the outer ring of the connecting ring 302 is provided with a plurality of second fan blades 305; the plurality of second fan blades 305 are sequentially distributed around the circumferential direction of the connecting ring 302. Action: (1) the heat dissipation fan comprises a center disc, a connecting ring and a connecting beam, the center disc is arranged in the inner part of the connecting ring, the edge of the center disc and the edge of the connecting ring are connected through a plurality of connecting beams, and the plurality of connecting beams are sequentially distributed around the circumferential direction of the center disc; so that the stable connection of the center disc and the connecting ring can be realized by using the connecting beam. (2) a plurality of first fan blades are arranged between the center disc and the inner ring of the connecting ring, the plurality of first fan blades are sequentially distributed around the circumferential direction of the center disc, the outer ring of the connecting ring is provided with a plurality of second fan blades, and the plurality of second fan blades are sequentially distributed around the circumferential direction of the connecting ring; so that when the heat dissipation fan of the utility model is matched with the radiator, the air forced convection provided by the rotation of the plurality of first fan blades is used to realize heat exchange between the air and the radiator in the area directly opposite the axis of the heat dissipation fan, and the air forced convection provided by the rotation of the plurality of second fan blades is used to realize heat exchange between the air and the radiator in the area directly opposite the axis of the heat dissipation fan. As can be known from the above analysis, after the heat dissipation fan is designed as coaxial double fans (i.e. the first fan blades of the inner ring and the second fan blades of the outer ring), the wind speed near the center of the surface of the radiator in the area directly opposite the axis of the heat dissipation fan is obviously increased, the utilization rate of the surface of the radiator is obviously increased, and the uniformity of the wind field of the surface of the radiator is obviously improved. After being matched with the heat dissipation fan, the radiator can be appropriately thinned, and this is conducive to cost reduction.

[0025] Specifically, a plurality of connecting beams 303 are located on the side of the center disc 301, the connecting ring 302, and the plurality of first blades 304 away from the heat sink 1, and the two ends of the connecting beam 303 are connected to the edge of the center disc 301 and the edge of the connecting ring 302, respectively, by bending. Effect: It can avoid the influence of the connecting beam on the heat dissipation cooperation of the heat dissipation fan and the heat sink.

[0026] Specifically, a plurality of connecting beams 303 are located on the side of the center disc 301, the connecting ring 302, and the plurality of first blades 304 away from the heat sink 1, and the two ends of the connecting beam 303 are connected to the edge of the center disc 301 and the edge of the connecting ring 302, respectively, by bending. Effect: It can avoid the influence of the connecting beam on the heat dissipation cooperation of the heat dissipation fan and the heat sink.

[0027] Specifically, the edge of the side surface of the center disc 301 away from the heat sink 1 is provided with a plurality of fan mounting holes 306, and the plurality of connecting beams 303 are arranged in the circumferential direction of the center disc 301. Effect: The center disc is provided with a plurality of fan mounting holes, and in actual work, the center disc is generally directly connected with the engine output shaft through a fan pad.

[0028] Specifically, the center disc 301 is a center disc, and the diameter d of the center disc is: 100mm≤d≤150mm, and the connecting ring 302 is a connecting ring. Effect: The center disc and the connecting ring can better cooperate with the first blade 304 and the second blade 305, thereby smoothly providing air forced convection when the heat dissipation fan rotates.

[0029] Specifically, the blade angle of the first blade 304 is: 35°≤blade angle≤58°, and the blade angle of the second blade 305 is: 35°≤blade angle≤58°. Effect: The blade angle can better drive air flow when the heat dissipation fan rotates.

[0030] Specifically, the blade shape of the first blade 304 is a sickle type, and the blade shape of the second blade 305 is a sickle type; the diameter of the first blade 304 is: 240mm≤diameter≤300mm, and the diameter of the second blade 305 is: 772mm±30mm. Effect: The blade shape is preferably a sickle type, and can also be other shapes. The first blade 304 is a small blade, and the second blade 305 is a large blade. Of course, the diameter of the entire heat dissipation fan can be designed according to the size of the actual heat sink.

[0031] Specifically, the edge of the center disc 301 is provided with seven first blades 304 at an equal angle in the axial direction, the outer circle of the connecting ring 302 is provided with seven second blades 305 at an equal angle in the axial direction, and the number of connecting beams 303 is seven. Effect: The center disc and the connecting ring are connected by 7 connecting beams to ensure the strength and reliability of the fan.

[0032] The utility model also provides a fan heat dissipation structure, including radiator 1, be equipped with the wind scooper 2 on radiator 1, the inside of wind scooper 2 is equipped with the heat dissipation fan 3 of any one of the above technical schemes;The bottom of radiator 1 is equipped with mounting bracket 4, and the radiator core body 101 of radiator 1 is oppositely arranged with heat dissipation fan 3. Action: the inside of wind scooper is equipped with heat dissipation fan through being equipped with wind scooper on radiator, can utilize the air forced convection provided when heat dissipation fan rotates, realizes the heat exchange of air through wind scooper and radiator, and mounting bracket 4 can conveniently install radiator, of course, the required accessory can also be set up beside mounting bracket 4, and heat dissipation fan 3 and radiator core body 101 of radiator 1 are oppositely arranged and can better radiate radiator core body 101.

[0033] The utility model also provides an engineering machinery, including engineering machinery body, still include any one of the above technical scheme's heat dissipation fan, or the fan heat dissipation structure of above technical scheme, heat dissipation fan or fan heat dissipation structure sets up on engineering machinery body. Action: the range of application of this fan heat dissipation structure: be applicable to the heat dissipation system of most engineering machinery (such as loader). When be applied to the loader, through design coaxial double fan heat dissipation system, solve the problem that the radiator heat dissipation area utilization rate of existing loader heat dissipation system is lower and radiator surface wind field uniformity is poor.

[0034] Summarized above, after designing heat dissipation fan as coaxial double fan (i. e. the first fan blade of inner ring, the second fan blade of outer ring), radiator outlet surface center near wind speed improves obviously 5 %-10 %, radiator surface utilization rate improves obviously, radiator surface wind field uniformity improves obviously, and the heat exchange capacity of heat dissipation system improves 5 %-10 %, after matching the heat dissipation fan, radiator core body can thin appropriately, and it is favorable to cost reduction.

[0035] The above is the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, on the premise of not departing from the principle of the utility model, can make a number of improvements and refinements, and these improvements and refinements are also regarded as the protection scope of the utility model.

Claims

1. A heat dissipating fan characterized by: The heat dissipation fan (3) comprises a center disc (301), a connecting ring (302) and connecting beams (303), the center disc (301) is arranged inside the connecting ring (302), the edge of the center disc (301) and the edge of the connecting ring (302) are connected through the connecting beams (303), and the connecting beams (303) are sequentially distributed in the circumferential direction of the center disc (301); a plurality of first fan blades (304) are arranged between the center disc (301) and the inner ring of the connecting ring (302), the first fan blades (304) are sequentially distributed in the circumferential direction of the center disc (301), and the outer ring of the connecting ring (302) is provided with a plurality of second fan blades (305), the second fan blades (305) are sequentially distributed in the circumferential direction of the connecting ring (302).

2. The heat dissipating fan according to claim 1, wherein: The connecting beams (303) are located on the side, away from the heat dissipation device (1), of the center disc (301), the connecting ring (302) and the first fan blades (304), and the two ends of the connecting beams (303) are respectively connected to the edge of the center disc (301) and the edge of the connecting ring (302) through bending.

3. The heat dissipating fan of claim 2, wherein: The connecting beams (303) and the first fan blades (304) are staggered in the circumferential direction of the center disc (301).

4. The heat dissipating fan of claim 3, wherein: An edge of the end face, away from the heat dissipation device (1), of the center disc (301) is provided with a plurality of fan mounting holes (306), and the connecting beams (303) and the fan mounting holes (306) are staggered in the circumferential direction of the center disc (301).

5. The heat dissipating fan according to any one of claims 1 to 4, characterized in that: The center disc (301) is a center disc, the diameter d of the center disc is 100mm≤d≤150mm, and the connecting ring (302) is a connecting ring.

6. The heat dissipating fan according to any one of claims 1 to 4, characterized in that: The blade angle of the first fan blade (304) is 35°≤blade angle≤58°, and the blade angle of the second fan blade (305) is 35°≤blade angle≤58°.

7. The heat dissipating fan according to any one of claims 1 to 4, characterized in that: The blade shape of the first fan blade (304) is a sickle type, the blade shape of the second fan blade (305) is a sickle type, the diameter of the first fan blade (304) is 240mm≤diameter≤300mm, and the diameter of the second fan blade (305) is 772mm±30mm.

8. The heat dissipating fan according to any one of claims 1 to 4, characterized in that: Seven first fan blades (304) are arranged on the edge of the center disc (301) at equal angles in the axial direction, seven second fan blades (305) are arranged on the outer ring of the connecting ring (302) at equal angles in the axial direction, and the number of the connecting beams (303) is seven.

9. A fan heat dissipation structure comprising a heat sink (1), a wind guide cover (2) is arranged on the heat sink (1), characterized in that: The inside of the air deflector (2) is provided with the heat dissipation fan (3) according to any one of claims 1 to 8, the bottom of the heat dissipation device (1) is provided with a mounting bracket (4), and the heat dissipation fan (3) is arranged opposite to the heat dissipation core (101) of the heat dissipation device (1).

10. A working machine comprising a working machine body, characterised in that: Also included is the heat dissipation fan according to any one of claims 1 to 8, or the fan heat dissipation structure according to claim 9, which is provided on the body of the working machine.

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