Novel intake port for tractor

Abstract

The utility model discloses a novel air inlet for tractor belongs to tractor engine air intake system technical field. In view of the problem that the coarse filter efficiency is low, and the maintenance is frequent, and the field of vision is shielded and the sealing reliability is insufficient to the high -altitude air inlet rotor filter structure of existing tractor air inlet, this air inlet includes vertical hollow casing, apron and mounting structure, and the casing is divided into coarse filter chamber, dust collection chamber and outlet chamber through the baffle assembly, and the coarse filter chamber is equipped with air inlet grating plate and cyclone tube group, and the outlet end of cyclone tube group communicates outlet chamber, and the dust outlet end communicates dust collection chamber, and the bottom of dust collection chamber is equipped with dust valve, and the mounting structure fixes the casing on the tractor frame. Through cyclone tube group realizes high -efficient centrifugal separation, and combines multistage cavity design and low -level installation, and the coarse filter efficiency is improved significantly, and the maintenance cycle is prolonged, and the installation space is saved, and the driving field of vision is optimized, and the reliability is enhanced to double -sealed structure, and the complex field conditions in field are adapted.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery, and more particularly to an air intake structure for a tractor. Background Technology

[0002] As the core power machinery in agricultural production, the reliable operation of a tractor's engine directly depends on the air filtration efficiency of its intake system. The intake manifold, a key component of the engine's intake system, primarily functions to provide the engine with sufficient and clean air, ensuring efficient fuel combustion, and effectively filtering out dust and impurities from the air through air filters (mostly dry or oil bath types), preventing premature engine wear.

[0003] Currently, the mainstream air intake structure for tractors on the market is a "high-position intake rotor filter + ordinary air filter" design. This structure has long served the dual purpose of pre-filtration and main filtration in agricultural operating environments (such as high dust concentrations and complex working conditions). Its working principle is as follows: after the outside air passes through the high-positioned rotor pre-filter to initially separate large dust particles, it enters the downstream air filter for fine filtration. Although this structure met the basic air intake requirements of tractors for a certain period, the following technical defects have gradually emerged during long-term use: 1. Low efficiency of coarse filtration and frequent maintenance.

[0004] Traditional structures rely on the centrifugal separation effect of rotor pre-filters, but their separation efficiency is limited by rotor speed (poor separation effect at low speeds), resulting in a large amount of fine dust entering the air filter, causing the air filter to clog quickly and requiring frequent cleaning or replacement. The maintenance cycle is short (usually 200-300 hours / time), significantly increasing the user's maintenance costs.

[0005] 2. The high-level layout takes up space and severely obstructs the view.

[0006] To avoid direct inhalation of ground dust, traditional air intakes adopt a high-mounted vertical layout, resulting in a large structural volume that obstructs the driver's forward view, increasing driving safety hazards, especially when turning in the field or working with low-lying crops.

[0007] 3. The sealing structure is simple and lacks reliability.

[0008] The connection between the rotor pre-filter and the air filter often uses a single radial seal ring. During assembly, the seal ring is prone to falling off or uneven compression due to positioning deviation, causing air leakage in the cavity. Unfiltered dusty air directly enters the engine, aggravating wear.

[0009] 4. Limited technical approach makes it difficult to overcome performance bottlenecks.

[0010] Existing technologies have long adhered to the inherent framework of "high-level arrangement + rotor pre-filter + separate filtration." Even with the introduction of new materials or processing techniques, fundamental problems such as "separation efficiency dependent on rotational speed," "large space occupation," and "unreliable sealing" have not been solved. The separate design of the rotor pre-filter and the air filter results in a long airflow path and high resistance, further reducing filtration efficiency.

[0011] The shortcomings of traditional technologies stem from their underlying design logic of "split-type filtering + high-level layout": 1. Bottleneck of separation efficiency: The rotor pre-filter separates dust by generating centrifugal force through rotating impeller, but the impeller speed is strongly coupled with the engine operating conditions (the separation efficiency drops sharply at idle or low speed), and a single filtration path cannot cope with high dust concentration environments. 2. Conflict between space and visibility: Although high-level placement can reduce the inhalation of ground dust, it sacrifices the driver's visibility and installation space, which goes against the development trend of "compact and intelligent" in modern agricultural machinery; 3. Defects in sealing reliability: The single radial seal relies on assembly precision and lacks auxiliary positioning structure, making it prone to failure in the bumpy working environment of a tractor, which leads to a further decrease in filtration efficiency.

[0012] To address the aforementioned issues, this patent application breaks through the traditional technical framework of "rotor pre-filtration + split layout" and establishes a technical approach of "integrated cyclone tube coarse filtration + multi-stage cavity coordination + low-position compact arrangement": High-efficiency coarse filtration: Dust is separated by centrifugal force through a fixed cyclone tube assembly (non-rotating structure). The separation efficiency is not affected by the operating conditions, and the coarse filtration efficiency is significantly improved compared with traditional rotor pre-filters. Multi-stage cavity design: The shell is divided into an air outlet cavity, a coarse filter cavity, and a dust collection cavity by left and right partitions, realizing an integrated flow channel of "air intake-separation-dust discharge", shortening the airflow path and reducing resistance; Dual sealing structure: Through the combination of radial sealing (left partition) and endoscopic sealing (right partition), the cavity is independently isolated, and assembly positioning is assisted to prevent the sealing ring from falling off. Low-profile flat layout: The low-profile mounting structure, which directly connects the flat shell to the frame, optimizes visibility and saves space, and is suitable for front-mounted installation on tractors.

[0013] This patent application solves the core technical problems of traditional air intake systems, namely "low coarse filtration efficiency, frequent maintenance, large space occupation, and insufficient sealing", through the above-mentioned technological innovations, and provides an efficient, reliable, and low-maintenance-cost solution for tractor air intake systems. Utility Model Content

[0014] The purpose of this utility model is to provide a new type of air intake for tractors, which is suitable for low-position arrangement and overcomes the problems of low coarse filtration efficiency, frequent maintenance, high cost, and obstructed vision and large space occupation caused by the "high-position air intake rotor filter + air filter" structure in the prior art.

[0015] To achieve the above objectives, the present invention provides a novel air intake duct for tractors, comprising a vertical hollow housing, a cover plate fixedly connected to the left side of the housing, an installation structure disposed on the right side of the housing, and an airflow separation assembly disposed inside the housing. The shell and the cover plate form a cavity, and a partition assembly is provided in the cavity, which divides the cavity into a coarse filter cavity, a dust collection cavity and an air outlet cavity. The side wall of the coarse filter chamber is provided with an air inlet grille plate, and the coarse filter chamber is provided with a cyclone tube assembly for separating dust. The air outlet end of the cyclone tube assembly is connected to the air outlet chamber, and the dust outlet end of the cyclone tube assembly is connected to the dust collection chamber. The air outlet chamber is provided with an air outlet that communicates with an external air filter, and the bottom of the dust collection chamber is provided with a dust discharge valve. The mounting structure is used to secure the housing to the tractor frame.

[0016] The partition assembly includes a left partition and a right partition. A left sealing ring is provided between the left partition and the inner wall of the housing, and a right sealing ring is provided between the right partition and the inner wall of the housing. The left sealing ring is a radial seal, and the right sealing ring is an endoscopic seal.

[0017] The mounting structure consists of two mounting ears spaced apart vertically, which are fixedly connected to the tractor frame by bolts.

[0018] The dust removal valve is a solenoid valve, which is electrically connected to the tractor's on-board ECU and is used for periodic dust removal.

[0019] The dust discharge valve is a manual valve, and the manual valve is equipped with a handle for easy operation.

[0020] The cyclone tube group includes at least 3 rows of cyclone tubes, and each row of cyclone tubes includes multiple cyclone tubes distributed vertically at intervals in the same vertical plane.

[0021] The air intake grille is a perforated metal plate with a hole diameter of 5-8 mm.

[0022] The shell has a flat structure, and the width to height ratio of the shell is 1:3-1:4.

[0023] The air outlet is connected to the air inlet of the tractor's air filter via a corrugated hose.

[0024] This utility model has the following advantages: Through the centrifugal separation effect of the cyclone tube assembly, compared with the traditional rotor pre-filter, the low-position compact design of the integrated cyclone tube assembly and multi-stage chambers achieves efficient coarse filtration and optimized layout, significantly improving coarse filtration efficiency, significantly extending maintenance cycle, and reducing maintenance costs; the vertical hollow shell and low-position installation structure are compatible with the front layout of tractors, saving space and optimizing visibility.

[0025] The double sealing structure (radial + lateral) prevents air leakage between chambers. The left sealing ring ensures that the air outlet chamber is isolated from the coarse filter chamber, and the right sealing ring assists in positioning the dust collection chamber. It is not easy to fall off during assembly and improves sealing stability.

[0026] The low-position dual mounting lug design achieves rigid fixation between the housing and the frame, adapts to the front-mounted layout of tractors, lowers the center of gravity of the vehicle, and improves driving stability.

[0027] ECU-controlled periodic dust removal avoids manual operation and reduces maintenance frequency. The dust removal cycle can be manually set by the driver according to the working conditions (e.g., once every 10 working hours).

[0028] The manual valve has a simple structure and low cost, and is suitable for low-end tractor models without ECU. The driver can manually remove dust according to the amount of dust accumulation.

[0029] Multiple rows of cyclone tubes arranged in parallel improve coarse filtration efficiency, easily achieve a compact structure, and save installation space. The use of porous metal plates can initially block large particles (diameter > 8mm), reducing the load on the cyclone tube assembly and extending its service life.

[0030] The flat housing optimizes forward visibility for the tractor and adapts to the limited front-mounted installation space of the tractor. The corrugated hose absorbs engine vibration, preventing fatigue fractures caused by rigid connections, and also facilitates fine-tuning during installation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model.

[0032] Figure 2 yes Figure 1 AA sectional view.

[0033] Figure 3 This is a three-dimensional structural diagram of the present invention. Detailed Implementation

[0034] Example

[0035] like Figures 1 to 3As shown, the novel air intake duct for tractors of this utility model includes a vertical hollow housing 1, a cover plate 2 fixedly connected to the left side of the housing 1, an installation structure 3 disposed on the right side of the housing 1, and an airflow separation assembly disposed inside the housing 1. The housing 1 and the cover plate 2 form a cavity, and a partition assembly is provided in the cavity, which divides the cavity into a coarse filter chamber 9, a dust collection chamber 10 and an air outlet chamber 8. The side wall of the coarse filter chamber 9 is provided with an air inlet grille plate 11. The coarse filter chamber 9 is provided with a cyclone tube assembly 12 for separating dust. The air outlet end of the cyclone tube assembly 12 is connected to the air outlet chamber 8, and the dust outlet end of the cyclone tube assembly 12 is connected to the dust collection chamber 10. The air outlet chamber 8 is provided with an air outlet 13 that communicates with an external air filter, and the bottom end of the dust collection chamber 10 is provided with a dust discharge valve 14. The mounting structure 3 is used to fix the housing 1 to the tractor frame.

[0036] Through the centrifugal separation effect of the cyclone tube assembly 12, compared with the traditional rotor pre-filter, the low-position compact design of the integrated cyclone tube assembly and multi-stage chambers achieves efficient coarse filtration and optimized layout, significantly improving coarse filtration efficiency and significantly extending the maintenance cycle by about four times in actual measurements, thus reducing maintenance costs; the vertical hollow shell 1 and the low-position mounting structure 3 are adapted to the front layout of the tractor, saving space and optimizing the field of vision.

[0037] The cyclone tube assembly 12 consists of multiple parallel conventional cyclone tubes. The airflow enters the coarse filter chamber 9 through the air inlet grille 11. The cyclone tube assembly 12 uses centrifugal force to separate dust. The dust falls into the dust collection chamber 10 through the dust outlet end and is discharged through the dust discharge valve 14. Clean air enters the air outlet chamber 8 through the air outlet end and flows to the air filter.

[0038] The partition assembly includes a left partition 4 and a right partition 5, which divide the cavity from left to right into an air outlet chamber 8, a coarse filter chamber 9 and a dust collection chamber 10; a left sealing ring 6 is provided between the left partition 4 and the inner wall of the housing 1, and a right sealing ring 7 is provided between the right partition 5 and the inner wall of the housing 1. The left sealing ring 6 is a radial seal, and the right sealing ring 7 is an endoscopic seal.

[0039] The dual-sealing structure radially and laterally prevents air leakage between chambers. The left sealing ring 6 ensures that the air outlet chamber 8 is isolated from the coarse filter chamber 9, and the right sealing ring 7 assists in positioning the dust collection chamber 10. This design makes it less likely to fall off during assembly and improves sealing stability.

[0040] The left sealing ring 6 and the right sealing ring 7 are made of nitrile rubber, and the left partition 4 and the right partition 5 are made of metal sheet by stamping. Of course, other materials can also be used.

[0041] The mounting structure 3 consists of two mounting ears spaced apart vertically, which are fixedly connected to the tractor frame by bolts.

[0042] The low-position dual mounting lug design achieves rigid fixation between the housing 1 and the frame, adapting to the front-mounted layout of tractors, lowering the overall center of gravity, and improving driving stability. The mounting lugs can be steel plates welded to the right side of the housing 1, with M10×30 high-strength bolts. Of course, steel plates of different materials and bolts of different specifications can also be used.

[0043] ECU-controlled periodic dust removal avoids manual operation and reduces maintenance frequency. The dust removal cycle can be manually set by the driver according to the working conditions, such as once every 10 working hours.

[0044] The dust removal valve 14 is a manual valve with a handle for easy operation. The handle is made of engineering plastic and is integrally injection molded with the valve stem, with an opening torque ≤5 N·m. The manual valve has a simple structure and low cost, and is suitable for low-end tractor models without an ECU. The driver can manually remove dust according to the amount of dust accumulation.

[0045] The cyclone tube assembly 12 includes at least three rows of cyclone tubes, each row comprising multiple cyclone tubes spaced vertically apart in the same vertical plane. The cyclone tubes are made of PA6+GF30 reinforced nylon. The parallel arrangement of multiple rows and multiple cyclone tubes improves coarse filtration efficiency, facilitates a compact structure, and saves installation space.

[0046] The air intake grille 11 is a perforated metal plate with holes ranging from 5 to 8 mm in diameter. The perforated metal plate is made of stainless steel, 2 mm thick, and the holes are arranged in a diamond pattern with a spacing of 10 mm. Using a perforated metal plate can initially block large particles with a diameter >8 mm, reducing the load on the cyclone separator 12 and extending its service life.

[0047] The housing 1 has a flat structure, with a width-to-height ratio of 1:3-1:4. The housing 1 is injection molded from ABS engineering plastic, with a wall thickness of 3mm, and preferably has reinforcing ribs on its surface. The flat structure of the housing 1 optimizes the forward visibility of the tractor and adapts to the space constraints of front-mounted installation on the tractor.

[0048] The air outlet 13 is connected to the air inlet of the tractor's air filter via a corrugated hose. The corrugated hose is made of EPDM rubber and has clamps at both ends for fixing, which is a conventional technology; the corrugated hose is not shown in the figure. The corrugated hose absorbs engine vibration, avoids pipe fatigue and breakage caused by rigid connections, and also facilitates fine-tuning of its position during installation.

[0049] The working process of this utility model is as follows: Air intake stage: After the engine starts, the dusty air from the outside enters the coarse filter chamber 9 through the air intake grille 11 under negative pressure. The grille gap of the air intake grille 11 is designed to be 2-3mm, which can initially block large particles of impurities such as leaves and straw with a diameter greater than 3mm, reduce the filtration load of the subsequent cyclone tube assembly 12, and extend the maintenance cycle of the cyclone tube assembly 12.

[0050] Coarse filtration stage: The dust-laden air entering the coarse filtration chamber 9 is evenly distributed to the cyclone tube group 12. The cyclone tube group 12 consists of multiple parallel cyclone tubes. The airflow spirals along the inner wall of the cyclone tubes. Centrifugal force is used to throw dust particles with a density greater than air and a diameter ≥5μm toward the inner wall of the tubes, which improves the coarse filtration efficiency compared with traditional rotor pre-filters. The separated dust falls into the dust collection chamber 10 through the dust outlet end of the cyclone tube group 12, while the clean air enters the air outlet chamber 8 through the air outlet end of the cyclone tube group 12, realizing efficient separation of air and dust.

[0051] Sealing guarantee: During the process of airflow passing through the coarse filter chamber 9, the exhaust chamber 8 and the dust collection chamber 10, the left sealing ring 6 between the left partition 4 and the inner wall of the housing forms a radial seal, and the right sealing ring 7 between the right partition 5 and the inner wall of the housing forms an endoscopic seal. The double sealing structure can effectively prevent dust-laden air from directly entering the exhaust chamber 8 without filtration, ensuring no cross-contamination between chambers, high sealing reliability, and avoiding premature engine wear.

[0052] Dust removal stage: After working for a period of time, the driver manually opens the dust removal valve 14 to remove the dust accumulated in the dust collection chamber 10. The dust removal process is convenient and quick and can be carried out at any time. Usually, dust removal is done when the tractor is stopped.

[0053] Fine filtration stage: Clean air in the exhaust chamber 8 enters the tractor air filter through the exhaust port 13 and pipeline for secondary fine filtration, ultimately providing clean air to the engine, meeting the requirements of the National IV emission standard for intake air cleanliness, and extending the engine's service life.

[0054] Continuous cycle phase: As the engine continues to operate, the intake-coarse filtration-fine filtration process repeats itself. Manual dust removal is usually performed when the tractor is not in operation. The low-positioned front-mounted housing 1 is rigidly connected to the frame via mounting ears 3, preventing seal failure caused by structural vibration under tractor bumpy conditions, thus improving the overall structural reliability and adapting to complex field road conditions.

[0055] Example

[0056] The difference between this embodiment and Embodiment 1 is that the dust discharge valve 14 is a solenoid valve, which is electrically connected to the tractor's onboard ECU and is used for periodic dust discharge. The solenoid valve is a DC24V normally closed type with a response time ≤0.5 seconds.

[0057] Dust removal stage: Dust in the dust collection chamber 10 accumulates to the bottom under the influence of gravity and airflow pressure difference. When the dust amount reaches a preset threshold, the pressure is monitored by the on-board ECU and the pressure sensor at the bottom of the dust collection chamber 10. The solenoid valve type of the dust removal valve 14 opens periodically under the control of the ECU, with an opening cycle of 30-60 minutes per cycle. The dust is discharged outside the vehicle through the dust removal valve 14. The dust collection chamber 10 will not experience excessive dust accumulation, avoiding secondary dust generation and significantly extending the maintenance cycle. Since the dust removal is controlled by the on-board ECU, there is no need to wait for the tractor to stop working before removing dust; dust can be removed at any time, and the dust removal valve 14 is closed after dust removal.

[0058] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A novel air intake for tractors, comprising a vertical hollow housing (1), characterized in that: It also includes a cover plate (2) fixedly connected to the left side of the housing (1), an installation structure (3) disposed on the right side of the housing (1), and an airflow separation assembly disposed inside the housing (1); The housing (1) and the cover plate (2) form a cavity, and a partition assembly is provided in the cavity, which divides the cavity into a coarse filter chamber (9), a dust collection chamber (10) and an air outlet chamber (8). The side wall of the coarse filter chamber (9) is provided with an air inlet grille (11), and the coarse filter chamber (9) is provided with a cyclone tube assembly (12) for separating dust. The air outlet end of the cyclone tube assembly (12) is connected to the air outlet chamber (8), and the dust outlet end of the cyclone tube assembly (12) is connected to the dust collection chamber (10). The air outlet chamber (8) is provided with an air outlet (13) that communicates with an external air filter, and the bottom end of the dust collection chamber (10) is provided with a dust discharge valve (14). The mounting structure (3) is used to fix the housing (1) to the tractor frame.

2. The novel air intake for a tractor according to claim 1, characterized in that: The partition assembly includes a left partition (4) and a right partition (5). A left sealing ring (6) is provided between the left partition (4) and the inner wall of the housing (1), and a right sealing ring (7) is provided between the right partition (5) and the inner wall of the housing (1). The left sealing ring (6) is a radial seal, and the right sealing ring (7) is an endoscopic seal.

3. The novel air intake for a tractor according to claim 1, characterized in that: The mounting structure (3) consists of two mounting ears spaced apart vertically, which are fixedly connected to the tractor frame by bolts.

4. The novel air intake for a tractor according to claim 1, characterized in that: The dust discharge valve (14) is a solenoid valve, which is electrically connected to the tractor's on-board ECU and is used for periodic dust discharge.

5. The novel air intake for a tractor according to claim 1, characterized in that: The dust discharge valve (14) is a manual valve, and the manual valve is equipped with a handle for easy operation.

6. The novel air intake for a tractor according to claim 1, characterized in that: The cyclone tube group (12) includes at least 3 rows of cyclone tubes, and each row of cyclone tubes includes multiple cyclone tubes distributed vertically at intervals in the same vertical plane.

7. The novel air intake for a tractor according to claim 1, characterized in that: The air intake grille (11) is a porous metal plate with a hole diameter of 5-8 mm.

8. The novel air intake for a tractor according to claim 1, characterized in that: The shell (1) has a flat structure, and the width to height ratio of the shell (1) is 1:3-1:

4.

9. The novel air intake for a tractor according to claim 1, characterized in that: The air outlet (13) is connected to the air inlet of the tractor air filter via a corrugated hose.

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