Profiling air inlet prefilter

Abstract

The utility model discloses a profiling air inlet prefilter, which belongs to the technical field of air inlet pipelines of engines and comprises a shell component consisting of a first shell and a second shell, and the first shell and the second shell are welded to form a closed cavity. An air inlet channel inlet is formed in one end of the cavity, and an air outlet and a dust discharging unit are arranged at the other end of the cavity; and a filtering and separating unit is arranged in the cavity. According to the prefilter with the profiling air inlet channel, through the design of the dust discharging unit, the filtering and separating unit and the profiling flow channel, the particle separating efficiency is improved, the air inlet resistance is reduced, the maintenance frequency of the air filter is reduced, and the energy consumption and the cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of engine intake pipe technology, and in particular to a contour-following intake pre-filter. Background Technology

[0002] In agricultural machinery, construction machinery, and other operating scenarios, the engine intake system faces harsh environments with high dust and debris. The rotor-type pre-filters commonly used in existing equipment have a coarse filtration efficiency of only about 85%, which cannot effectively separate fine particulate impurities. When the airflow passes through, the turbulence is intense, resulting in high resistance at the front end of the air filter and increased engine intake load. The accumulation of unseparated impurities requires frequent maintenance and replacement of the air filter element, reduces operating efficiency, increases maintenance costs, and the high resistance forces the engine to increase intake power consumption, leading to increased fuel consumption and even premature engine wear. Therefore, there is an urgent need to develop a high-efficiency, low-resistance pre-filter structure and filtration method. Utility Model Content

[0003] The purpose of this invention is to provide a contoured air intake pre-filter. By setting up a dust removal unit, a filtration and separation unit, and a contoured flow channel design, it improves particle separation efficiency, reduces air intake resistance, reduces air filter maintenance frequency, and lowers energy consumption and costs.

[0004] To achieve the above objectives, this utility model provides a contoured air intake pre-filter, comprising a housing assembly consisting of a first housing and a second housing, wherein the first housing and the second housing are welded together to form a closed cavity; one end of the cavity is provided with an air intake inlet, and the other end is provided with an air outlet and a dust removal unit; a filtration and separation unit is provided inside the cavity.

[0005] Preferably, the filtration and separation unit includes a pre-filtration module, a cyclone separation module, and a flow guiding module:

[0006] The primary filter module is a filter screen that is fixedly installed at the air intake inlet to intercept large particulate impurities;

[0007] The swirl separation module includes swirl blades arranged in a spiral shape within the cavity, and a rectifier cone located at the air inlet end of the swirl blades. The rectifier cone is used to guide the airflow to generate centrifugal force.

[0008] The flow guiding module is a flow divider cone installed inside the air outlet, used for secondary rectification of the purified gas.

[0009] Preferably, the dust removal unit includes a dust removal port and a dust removal valve. The dust removal port is located at the end of the cavity where the air outlet is located, and the dust removal port is fixedly connected to the dust removal valve by a hose clamp.

[0010] Preferably, the air outlet and the cavity are sealed with a sealing strip.

[0011] Preferably, the cross-sectional area of ​​the internal flow channel of the cavity gradually shrinks from the air inlet to the air outlet to enhance the airflow velocity and centrifugal separation effect.

[0012] Preferably, the filtration accuracy of the filter screen is higher than the separation accuracy of the cyclone separation module.

[0013] Therefore, the present invention employs the above-mentioned contour-following inlet pre-filter, which has the following technical effects:

[0014] (1) High-efficiency separation: The graded purification structure, which combines the primary filtration module and the cyclone separation module, improves particle separation efficiency and significantly reduces the load on the air filter element;

[0015] (2) Low resistance characteristics: The cross-sectional area of ​​the contoured intake duct gradually shrinks, and the straight-through guide structure of the swirl blades reduces the intake resistance.

[0016] (3) Automatic dust removal: The rubber dust removal valve utilizes the dynamic balance of negative pressure and gravity to achieve automatic dust removal without power, requiring no manual intervention and reducing maintenance frequency;

[0017] (4) Compact structure: The shell is integrally formed by hot plate welding and modular assembly, which facilitates large-scale production and installation.

[0018] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing the disassembled shape of the pre-filter for the intake duct according to this utility model.

[0020] Figure Labels

[0021] 1. Housing assembly; 11. First housing; 12. Second housing; 2. Cavity; 3. Air inlet; 4. Air outlet; 5. Dust removal unit; 51. Dust outlet; 52. Dust removal valve; 53. Hose clamp; 6. Filtration and separation unit; 61. Filter screen; 62. Swirl separation module; 621. Swirl blades; 622. Rectifying cone; 63. Dividing cone; 7. Sealing strip. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0023] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] like Figure 1 As shown, a contoured air intake pre-filter includes: a housing assembly 1, which is composed of a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are welded to form a closed cavity 2 to ensure no leakage under negative pressure. One end of the cavity 2 is provided with an air intake inlet 3, and the other end is provided with an air outlet 4 and a dust removal unit 5. The air outlet 4 is sealed to the cavity 2 by a sealing strip 7 and fixed with a clamp. A filtration and separation unit 6 is provided inside the cavity 2. The cross-sectional area of ​​the internal flow channel of the cavity 2 gradually narrows from the air intake inlet 3 to the air outlet 4 to enhance the airflow velocity and centrifugal separation effect.

[0025] The filtration and separation unit 6 includes a pre-filtration module, a cyclone separation module 62, and a flow guiding module.

[0026] The primary filter module is a filter screen 61 fixedly installed at the air intake 3. Its filtration accuracy is greater than that of the subsequent cyclone separation module 62, and it prioritizes the interception of large particulate impurities.

[0027] The cyclone separation module 62 includes cyclone blades 621 and a rectifier cone 622. The cyclone blades 621 are spirally distributed in the cavity 2. The rectifier cone 622 is located at the air inlet end of the cyclone blades 621. After the airflow is guided by the rectifier cone 622, it enters the cyclone blades 621 and generates centrifugal force to make impurities move toward the wall of the cavity 2.

[0028] The flow guiding module is a flow divider cone 63 located inside the air outlet 4, which is used to rectify the purified gas in a secondary manner and reduce airflow pulsation.

[0029] The dust removal unit 5 includes a dust removal port 51 and a dust removal valve 52. The dust removal port 51 is located at the end of the cavity 2 where the air outlet 4 is located. The dust removal port 51 is fixed to the dust removal valve 52 by a hose clamp 53. The dust removal valve 52 automatically closes under negative pressure. When the engine stops or the weight of the ash and slag accumulated in the dust removal port 51 exceeds the negative pressure adsorption force, the dust removal is automatically opened by gravity.

[0030] Working principle:

[0031] When the engine is running, the air filter generates negative pressure through the outlet 4, and the dust discharge valve 52 closes tightly under the action of negative pressure. Gas containing impurities is drawn in through the intake duct inlet 3, first passing through the filter screen 61 to intercept large particles, and then the airflow is guided by the rectifier cone 622 into the swirl vanes 621. The spiral structure of the swirl vanes 621 causes the airflow to rotate at high speed, and impurities are thrown against the wall of the cavity 2 under centrifugal force, spiraling down the wall and accumulating at the dust discharge port 51. The purified gas is then rectified a second time by the diverter cone 63 and enters the air filter through the outlet 4.

[0032] When the engine stops, causing the negative pressure to disappear, or when the weight of the ash and slag accumulated in the dust discharge port 51 exceeds the negative pressure adsorption force, the rubber dust discharge valve 52 automatically opens due to gravity, and the accumulated impurities are discharged from the dust discharge port 51. After the dust discharge is completed, the engine restarts and generates negative pressure, causing the dust discharge valve 52 to close again, entering the next filtration cycle.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A contour-following intake pre-filter, characterized in that, The device includes a housing assembly consisting of a first housing and a second housing, the first housing and the second housing being welded together to form a closed cavity; one end of the cavity is provided with an air inlet, and the other end is provided with an air outlet and a dust removal unit, the air outlet being sealed to the cavity by a sealing strip; the cross-sectional area of ​​the internal flow channel of the cavity gradually narrows from the air inlet to the air outlet to enhance the airflow velocity and centrifugal separation effect; a filtration and separation unit is provided inside the cavity; The filtration and separation unit includes a pre-filter module, a swirl separation module, and a flow guiding module: the pre-filter module is a filter screen fixedly installed at the air inlet to intercept large particulate impurities; the swirl separation module includes swirl blades distributed in a spiral shape in the cavity, and a rectifier cone located at the air inlet end of the swirl blades, the rectifier cone being used to guide the airflow to generate centrifugal force; the flow guiding module is a flow divider cone installed inside the air outlet to perform secondary rectification of the purified gas.

2. The contour-following intake pre-filter according to claim 1, characterized in that, The dust removal unit includes a dust removal port and a dust removal valve. The dust removal port is located at the end of the cavity where the air outlet is located, and the dust removal port is fixedly connected to the dust removal valve through a hose clamp.

3. A contour-following intake pre-filter according to claim 2, characterized in that, The filtration accuracy of the filter screen is higher than that of the cyclone separation module.

Images