Engine cooling fan capable of reducing noise

Abstract

According to the noise-reduction engine cooling fan, at least six noise-reduction small holes are formed in the fan blades, local negative pressure can be generated when airflow passes through the noise-reduction small holes, and therefore micro vortexes are formed, and disturbance and noise of the airflow are effectively reduced. The noise reduction small holes are evenly distributed between the front edge and the rear edge of the fan blade so that uniform dispersion of airflow and the maximum noise reduction effect can be guaranteed. The diameter range of the noise reduction small holes is set to be 0.5 mm to 2 mm, and the requirements of air flow and noise control can be effectively balanced. A plurality of semicircular blade tip structures are evenly arranged on the front edge of the fan blade along the edge of the fan blade, and optimization is carried out aiming at turbulence at the tail end of airflow. The thickness of a semicircle of the semicircular blade tip structure is 20%-30% of the thickness of the front edge of the fan blade, the tooth space is 1 cm to 2 cm, it is guaranteed that airflow can be smoothly shunted when passing through, impact and intense turbulence of the airflow are reduced, and therefore noise generated by instability of the airflow is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling fans, in particular to a noise-reducing engine cooling fan. Background Art

[0002] Tractors play a vital role in agricultural production, and the noise generated by their engines is often a major factor affecting operator comfort and work efficiency. Traditional engine cooling fans simply dissipate heat and do not address noise reduction. While some noise-reducing fan products exist on the market, most rely on improved materials or soundproofing designs, failing to fundamentally address the noise issues caused by airflow vortices and turbulence. Utility Model Content

[0003] The utility model aims to provide a noise-reducing engine cooling fan, which can significantly reduce the noise generated by the cooling fan during operation.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a noise-reducing engine cooling fan, comprising a plurality of fan blades, each of which is provided with at least 6 noise-reduction holes, the noise-reduction holes being evenly distributed between the leading edge and the trailing edge of the fan blade, and a plurality of semicircular blade tip structures being evenly provided along the edge of the leading edge of the fan blade.

[0005] Preferably, the noise reduction holes are arranged on the fan blades in a ring or arc shape as a whole.

[0006] Preferably, the diameter range of the noise reduction holes is set to be 0.5 mm to 2 mm.

[0007] Preferably, the thickness of the semicircle of the semicircular blade tip structure is 20%-30% of the thickness of the leading edge of the fan blade, and the tooth spacing is 1 cm to 2 cm.

[0008] Preferably, the fan blades are made of polypropylene or polycarbonate.

[0009] The beneficial effects of the utility model are:

[0010] This solution sets at least 6 noise reduction holes on the fan blades. According to the principles of fluid mechanics, when the airflow passes through these noise reduction holes, local negative pressure is generated, thereby forming micro-vortices, thereby effectively reducing the disturbance and noise of the airflow. The cooling fan can form a stable airflow during operation, reducing the noise caused by the instability of the airflow. The noise reduction holes are evenly distributed between the leading and trailing edges of the fan blades to ensure uniform dispersion of the airflow and maximize the noise reduction effect. The diameter range of the noise reduction holes is set to 0.5mm to 2mm, which can effectively balance the needs of air flow and noise control.

[0011] This solution optimizes turbulence at the end of the airflow by uniformly distributing multiple semicircular blade tips along the leading edge of the fan blade. The semicircular tip structures have a thickness of 20%-30% of the leading edge thickness of the fan blade, and the teeth are spaced 1cm to 2cm apart. This ensures smooth flow diversion during passage, reducing impact and turbulence, and thus reducing noise caused by unstable airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] In the figure, 1. Noise reduction hole, 2. Semicircular blade tip structure, 3. Rotating motor, 4. Fan blade, 5. Temperature sensor, 6. Control unit. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in this specification so as to facilitate understanding and reading by those familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes shall still fall within the scope of the technical contents disclosed in this utility model without affecting the efficacy and objectives that can be achieved by the present utility model.

[0017] At the same time, it should be noted that: unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the technical field to which the utility model belongs. The meaning of "multiple" used in the patent application specification and claims of this utility model is two or more; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front end", "rear end", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. Changes or adjustments to their relative relationships, without substantial changes in the technical content, should also be regarded as the scope of implementation of the utility model.

[0018] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0019] The utility model discloses a noise-reducing engine cooling fan. Figure 1 As shown, the embodiment includes a plurality of fan blades 4, and the fan blades 4 are made of polypropylene or polycarbonate material.

[0020] The fan blades 4 are provided with at least six noise-reducing holes 1. According to the principles of fluid mechanics, when air flows through these holes 1, local negative pressure is generated, thereby forming micro-vortices, which effectively reduce airflow disturbances and noise. This allows the cooling fan to generate a stable airflow during operation, reducing noise caused by airflow instability.

[0021] The noise reduction holes 1 are arranged in a circular or arc-shaped pattern on the fan blades 4. They are evenly distributed between the leading and trailing edges of the fan blades 4 to ensure uniform airflow dispersion and maximize noise reduction. The diameter of the holes 1 ranges from 0.5mm to 2mm, effectively balancing the requirements of air flow and noise control.

[0022] Multiple semicircular tip structures 2 are evenly spaced along the leading edge of the fan blades 4, optimizing for turbulent airflow at the end. The thickness of the semicircle of these tip structures 2 is 20%-30% of the thickness of the leading edge of the fan blade 4, and the tooth spacing is 1cm to 2cm. This ensures smooth flow diversion during passage, reducing impact and turbulence, and thus reducing noise caused by unstable airflow.

[0023] The engine cooling fan is equipped with an electronic control system consisting of a rotating motor 3, a control unit 6, and a temperature sensor 5. The rotating motor 3 rotates the fan blades 4, and a speed sensor is provided on the rotating motor 3 to detect its rotational speed. The temperature sensor 5 monitors the engine's operating temperature in real time and feeds this data back to the control unit 6. The control unit 6 automatically adjusts the speed of the rotating motor 3 based on the engine's real-time temperature and a preset cooling strategy to achieve efficient cooling.

[0024] It should be noted that the parts not described in detail in the above embodiments are all prior art.

[0025] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the present invention can make slight changes or modifications to equivalent embodiments using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should be included in the scope of protection of the present invention.

Claims

1. A noise-reducing engine cooling fan, characterized by: The invention comprises a plurality of fan blades (4), wherein the fan blades (4) are provided with at least 6 small noise reduction holes (1), wherein the small noise reduction holes (1) are evenly distributed between the leading edge and the trailing edge of the fan blades (4), and a plurality of semicircular blade tip structures (2) are evenly provided along the edge of the leading edge of the fan blades (4).

2. The noise-reducing engine cooling fan according to claim 1, characterized in that: The noise reduction holes (1) are arranged on the fan blades (4) in a ring or arc shape as a whole.

3. The noise-reducing engine cooling fan according to claim 1, characterized in that: The diameter range of the noise reduction hole (1) is set to be 0.5 mm to 2 mm.

4. The noise-reducing engine cooling fan according to claim 1, characterized in that: The semicircular thickness of the semicircular blade tip structure (2) is 20%-30% of the thickness of the leading edge of the fan blade (4), and the tooth spacing is 1 cm to 2 cm.

5. The noise-reducing engine cooling fan according to claim 1, characterized in that: The material of the fan blades (4) is polypropylene or polycarbonate.

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