Desert dry-type filtering system with high filtering efficiency

Abstract

The utility model relates to a desert dry-type filtering system with high filtering efficiency. The desert dry-type filtering system solves the problem that an air filter is easy to block in a severe environment. Comprising a pre-filtering air inlet channel, an air inlet transition elbow, an air coarse filter, an air fine filter and an air inlet system fixing and supporting unit, the air coarse filter and the air fine filter are fixed to the air inlet system fixing and supporting unit, and a plastic net cover is integrally formed at the upper end of the air inlet transition elbow and connected with a corrugated telescopic pipe below the pre-filtering air inlet channel. An air outlet at the lower end is connected with the air coarse strainer in a riveting or bolted manner, the air coarse strainer is a reverse rotational flow observation chamber coarse strainer, the interior of the air coarse strainer is of a cone rotational flow sheet structure, and an air outlet of the air coarse strainer is connected with an air inlet of the air fine strainer. The requirement of the engine for the air inflow can be met, sufficient combustion of the engine can be achieved, and the emission amount of tail emission carbon particles is reduced.

Description

Technical Field

[0001] The utility model relates to a filtering system, in particular to a desert dry filtering system with high filtering efficiency. Background Art

[0002] As the mainstream mode of road freight transportation, heavy-duty trucks play a vital role in the development of society. With the annual increase in vehicle ownership, environmental pollution from vehicle exhaust emissions is becoming increasingly serious. National regulations have also set strict emission limits for exhaust particulate matter. Within this context, optimizing the intake system is crucial for engine performance. This ensures sufficient air flow to ensure proper engine power and fuel combustion, reducing harmful particulate matter emissions and extending engine life.

[0003] According to the different air filter media, air filters are divided into dry air filters and wet air filters. At the same time, according to the differences in practical working conditions, they are divided into single-stage and multi-stage filtration. The most widely used one is the dry two-stage filtration system, which is the conventional configuration for highway tractors. The second most widely used one is the desert air filter based on the basic principle of centrifugal dust filtration of cyclone tubes. Although this type of desert filter can be used in sandy and dusty environments, for harsh working conditions such as mines and deserts, the driver must also carry a spare filter element. In order to ensure the service life of the engine supercharger, it relies on vehicle experience to replace and maintain it before the alarm, which results in unnecessary waste. Utility Model Content

[0004] The utility model solves the problem that air filters are prone to clogging in harsh environments by providing a desert dry filtration system with high filtration efficiency.

[0005] The utility model is realized by the following technical solutions:

[0006] A high-filtration-efficiency desert dry-type filtration system comprises a pre-filtration air intake duct 1, an air intake transition elbow 2, an air coarse filter 3, an air fine filter 4 and an air intake system fixed support unit 5. The air coarse filter 3 and the air fine filter 4 are fixed on the air intake system fixed support unit 5. A plastic mesh cover is integrally formed at the upper end of the air intake transition elbow 2 and is connected to the corrugated telescopic tube below the pre-filtration air intake duct 1. The air outlet at the lower end is connected to the air coarse filter 3 by riveting or bolting. The air coarse filter 3 is a reverse cyclone chamber coarse filter with a vertebral cyclone sheet structure inside. The air outlet of the air coarse filter 3 is connected to the air inlet of the air fine filter 4.

[0007] The air intake transition elbow 2 is fixedly connected to the air intake system fixed support unit 5 .

[0008] The air coarse filter 3 and the air fine filter 4 are arranged left to right or up to down.

[0009] The pre-filter air inlet duct 1 is made of high-density polyethylene plastic and is formed by injection molding.

[0010] The overall structure of the air intake transition elbow 2 is made of PP polypropylene plastic.

[0011] The main body of the air filter 3 is made of PP polypropylene.

[0012] The air intake transition elbow 2 and the air coarse filter 3 are connected and fixed with self-tapping screws.

[0013] The utility model can ensure the air intake demand of the engine, the engine can fully burn, and the emission of tail carbon particles is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a graph showing the relationship between the engine's air intake and the cyclone tube's filtration efficiency;

[0016] Figure 3 This is a diagram showing the combination of the air coarse filter and the air fine filter of the utility model;

[0017] Figure 4 It is a schematic diagram of the pre-filter intake duct;

[0018] Figure 5 It is a schematic diagram of the intake transition elbow;

[0019] Figure 6 Schematic diagram of the air prefilter. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, the present invention provides a high-efficiency desert dry-type filtration system, comprising a pre-filtration intake duct 1, an intake transition elbow 2, a primary air filter 3, a secondary air filter 4, and an intake system fixed support unit 5. The primary air filter 3 and secondary air filter 4 are fixed to the intake system fixed support unit 5. This type of air filter system is often used in dusty desert areas. Because of the high dust content in deserts, the cyclone tube's filtration efficiency is highly required. The cyclone tube's filtration efficiency is closely related to the engine's speed; the air filter's filtration efficiency is guaranteed only when the engine is at a certain speed. Figure 2 The relationship between the engine's air intake volume and the cyclone tube's filtration efficiency is given. From the figure, it can be analyzed that it is not very applicable in vehicles with low engine speeds.

[0021] The utility model combines a fine-filtration dry air filter with a coarse-filtration swirl filter. Depending on the vehicle, there are two arrangements: left and right or top and bottom. Figure 3 shown.

[0022] The pre-filter intake duct 1 allows the outside air of the vehicle to enter the air filter channel under the suction effect of the engine supercharger. The overall support structure of the intake duct is made of high-density polyethylene plastic, and the wall thickness of the product is controlled by injection molding process. 3 / h, using 270 mesh quartz sand as the test dust, the filtration efficiency is not less than 70%, the original resistance is not greater than 1.2kPa, such as Figure 4 shown.

[0023] The overall structure of the intake transition elbow 2 is made of PP (polypropylene) plastic, which is the lightest plastic material and can help the entire vehicle achieve lightweight. The upper end is integrally formed with a plastic mesh cover, which is connected to the corrugated telescopic pipe below the pre-filter intake duct 1. The lower end of the air outlet is connected to the air coarse filter by riveting and bolts. Figure 5 shown.

[0024] The main body of the air coarse filter 3 is made of PP polypropylene, and the color of the assembly is black. It is a reverse cyclone chamber coarse filter with a conical cyclone plate structure inside. The rated flow rate is 1400m3 / h; the pre-filtration efficiency of the assembly is ≥90%, and the original resistance of the assembly is ≤3.0KPa; the total dust removal efficiency is greater than or equal to 90%; all of this assembly except the dust outlet is blocked, and a 20KPa negative pressure is connected to the dust outlet. The leakage of the entire intake duct is less than 5L / min. Under the condition of a frequency of 67Hz, the following experiments are carried out: the acceleration of the vehicle in the up and down direction is 8g; the acceleration of the vehicle in the left and right direction is 4g, and the acceleration of the vehicle in the front and rear direction is 5g for 8 hours each, for a total of 24 hours of vibration test. After the vibration of the reserved mounting holes and brackets below, there are no defects such as cracking and deformation of the components. The air intake transition elbow 2 can be connected and fixed with the primary filter using self-tapping screws to ensure the reliability and durability of the product. Figure 6 shown.

[0025] Air fine filter 4 has a rated air flow of 1900m3 / h; the initial filtration efficiency is not less than 99.8%; the full life filtration efficiency is not less than 99.95%; the initial resistance is not greater than 2.5kPa; the full life intake resistance (filter element maintenance alarm resistance) is 6.2kPa.

[0026] In response to harsh working conditions and high dust particle concentrations, the utility model uses a two-stage control system for the air intake duct and the cone swirl vane structure, which greatly improves the filtration efficiency by relying on the coarse filter; the air intake duct fits tightly with the cab, which is beneficial to the layout of the entire vehicle and space utilization.

Claims

1. A high filtration efficiency desert dry filtration system, characterized by: It includes a pre-filter intake duct, an intake transition elbow, an air coarse filter, an air fine filter and an intake system fixed support unit. The air coarse filter and the air fine filter are fixed on the intake system fixed support unit. A plastic mesh cover is integrally formed at the upper end of the intake transition elbow and is connected to the corrugated expansion pipe below the pre-filter intake duct. The lower end air outlet is connected to the air coarse filter by riveting or bolts. The air coarse filter is a reverse swirl chamber coarse filter with a vertebral swirl sheet structure inside. The air outlet of the air coarse filter is connected to the air inlet of the air fine filter.

2. The high filtration efficiency desert dry filtration system according to claim 1 is characterized by: The air intake transition elbow is fixedly connected to the air intake system fixed support unit.

3. The high filtration efficiency desert dry filtration system according to claim 1 is characterized by: The air coarse filter and air fine filter are arranged left to right or up and down.

4. The high filtration efficiency desert dry filtration system according to claim 1 is characterized by: The pre-filter air intake duct is made of high-density polyethylene plastic and is formed by injection molding.

5. The high filtration efficiency desert dry filtration system according to claim 1 is characterized by: The overall structure of the air intake transition elbow is made of PP polypropylene plastic.

6. The high filtration efficiency desert dry filtration system according to claim 1 is characterized by: The main body of the air filter is made of PP polypropylene.

7. The high filtration efficiency desert dry filtration system according to claim 1 is characterized by: The air intake transition elbow and the air coarse filter are connected and fixed with self-tapping screws.

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