Constant-resistance maintenance-free air filter powered by vehicle gas turbine

Abstract

The invention discloses a constant-resistance maintenance-free air filter powered by a vehicle gas turbine. The constant-resistance maintenance-free air filter comprises an air inlet waterproof unit, an inertia separation unit, a dust extraction system and a gas turbine air inlet connecting section. The air inlet waterproof unit, the inertia separation unit and the gas turbine air inlet connecting section are sequentially connected in a sealed mode. A grating is arranged at the upstream end of the air inlet waterproof unit, and a drainage hole is formed in the bottom of the air inlet waterproof unit; the grating is used for intercepting water in external air; water is discharged from the drainage hole; a dust collection cavity and a straight-flow type rotational flow pipe set are arranged in the inertia separation unit, the straight-flow type rotational flow pipe set is used for separating air and dust, the separated dust enters the dust collection cavity, and the separated air enters the gas turbine through the gas turbine air inlet connecting section; the dust suction system is connected with the inertia separation unit, communicates with the dust collection cavity and is used for sucking out dust in the dust collection cavity, a filter element is not needed, and the problems that resistance of a traditional filter element is increased due to dust accumulation, and an air filter is fast to block and needs to be frequently maintained in a high-dust environment are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engine air intake, and particularly relates to a constant-resistance maintenance-free air filter for vehicle combustion engine power. BACKGROUND

[0002] The combustion engine (i.e. gas turbine) applied to special vehicles has a larger air-fuel ratio than the diesel engine power, and thus needs a larger air intake under the same output power, which requires a relatively large volume of the air filter. However, the power cabin space of the special vehicle cannot meet the demand of the air filter volume increasing in proportion, which results in the initial resistance of the air filter being relatively high and the resistance rapidly increasing during use, and finally causes the air filter to be frequently maintained, and the power output and fuel consumption indicators of the combustion engine are both not ideal, so the combustion engine applied to ground vehicles needs to develop a constant-resistance, maintenance-free and long-life air filter. SUMMARY

[0003] Therefore, the application provides a constant-resistance maintenance-free air filter for vehicle combustion engine power, which is constant-resistance, maintenance-free and long-life.

[0004] The application is achieved by the following technical scheme.

[0005] The constant-resistance maintenance-free air filter for vehicle combustion engine power comprises an air intake waterproof unit, an inertial separation unit, a dust extraction system and a combustion engine air intake connecting section.

[0006] The air intake waterproof unit, the inertial separation unit and the combustion engine air intake connecting section are sequentially and sealingly connected.

[0007] The upstream end of the air intake waterproof unit is provided with a grille, and the bottom of the air intake waterproof unit is provided with a drain hole; the grille is used for intercepting water in external air; and the water is discharged through the drain hole.

[0008] The inertial separation unit is provided with a dust collection cavity and a straight-flow cyclone pipe group; the straight-flow cyclone pipe group is used for separating air and dust; the separated dust enters the dust collection cavity; and the separated air enters the combustion engine through the combustion engine air intake connecting section.

[0009] The dust extraction system is connected with the inertial separation unit and communicates with the dust collection cavity, and is used for extracting the dust in the dust collection cavity.

[0010] Further, the dust extraction system comprises a dust extraction pump, the dust extraction pump is connected with the inertial separation unit and communicates with the dust collection cavity, and is used for extracting the dust in the dust collection cavity.

[0011] Further, the dust extraction system comprises a combustion engine, a compressor bleed air pipe and an ejection dust discharge pipe.

[0012] One end of the compressor air guide pipe is connected with the compressor section of the gas turbine, and the other end is connected with the ejection dust removal pipe.

[0013] Further, the dust extraction system comprises a gas turbine, an exhaust air guide pipe and an ejection dust removal pipe.

[0014] One end of the exhaust air guide pipe is connected with the exhaust section of the gas turbine, and the other end is connected with the ejection dust removal pipe.

[0015] Further, the grid comprises a plurality of grid pieces, and the plurality of grid pieces are arranged in a horizontal and vertical manner to form N rows of a plurality of columns of grid pieces; N is greater than or equal to 2 and is a natural number.

[0016] Each row of grid pieces is arranged in a left-right direction, and each column of grid pieces is arranged in a front-rear direction.

[0017] Each grid piece comprises an inclined plate and a bent plate; the rear end of the inclined plate is inclined to the left side or the right side, one end of the bent plate is integrally formed with the rear end of the inclined plate, and the other end of the bent plate is bent to the inclined direction of the rear end of the inclined plate to form a U-shaped groove with the inclined plate.

[0018] The inclined direction of the horizontal plate of the adjacent row of grid pieces is opposite, and the bent direction of the bent plate of the adjacent row of grid pieces is opposite.

[0019] Further, the inertial separation unit further comprises a mounting shell, the front and rear ends of the mounting shell are open, and the straight-flow cyclone pipe group is arranged in the mounting shell; the aforementioned dust collection cavity is formed between the straight-flow cyclone pipe group and the mounting shell.

[0020] The straight-flow cyclone pipe group comprises a plurality of single-stage straight-flow cyclone pipes arranged side by side, and each single-stage straight-flow cyclone pipe comprises a guide vane, a guide pipe and an air outlet pipe; the guide vane is located in the guide pipe and at one end of the guide pipe, the guide vane is rotatable in the guide pipe, and the air outlet pipe is coaxially connected to the other end of the guide pipe.

[0021] Further, the inertial separation unit further comprises a mounting shell, the front and rear ends of the mounting shell are open, and the straight-flow cyclone pipe group is arranged in the mounting shell; the aforementioned dust collection cavity is formed between the straight-flow cyclone pipe group and the mounting shell.

[0022] The straight-flow cyclone pipe group comprises a plurality of double-stage straight-flow cyclone pipes arranged side by side; each double-stage straight-flow cyclone pipe comprises a first cyclone pipe and a second cyclone pipe connected in series.

[0023] The first cyclone pipe and the second cyclone pipe are connected end to end, the guide vane of the first cyclone pipe is located towards the air inlet waterproof unit, and the air outlet pipe of the second cyclone pipe is located towards the air inlet connection section of the gas turbine.

[0024] Further, the front end of the inclined plate of the latter row of grid pieces is bent to form a connecting plate on the side where the bending part is located, and the connecting plate forms an obtuse angle with the inclined plate; the connecting plate is connected to the side of the U-shaped groove of the inclined plate of the former row of grid pieces.

[0025] Further, the air inlet waterproof unit further comprises a bottom plate and a seat frame;

[0026] One side of the bottom plate is fixedly connected with the inertial separation unit; a through hole is arranged on the bottom plate, the seat frame is located on the other side of the bottom plate and is arranged around the through hole; the grid is fixedly connected in the seat frame, and the drain hole is arranged at the bottom of the seat frame.

[0027] Further, the height of the top of the seat frame protruding from the bottom plate is greater than the height of the bottom of the seat frame protruding from the bottom plate, and the grid as a whole is inclined.

[0028] Advantages:

[0029] (1) The application provides a constant-resistance maintenance-free air filter for a vehicle engine, which can realize low and constant air inlet purification under large air inlet volume of fuel and engine power in a compact power cabin space of a special vehicle, and has a self-dust-removal maintenance-free function, thereby solving the problems of large air inlet resistance, fast clogging and frequent maintenance of filter elements caused by conventional air filters, enabling the engine to have good power output and fuel consumption rate and improving the applicability of the engine power on the special vehicle.

[0030] (2) The application can directly use the energy of the engine compressor, without the need for an independent motor or external power source to drive a dust removal device, thereby realizing efficient reuse of the energy of the gas turbine and reducing the comprehensive energy consumption of the system.

[0031] (3) The application can convert the waste heat originally discharged into the atmosphere into dust removal power, so that the net energy consumption of the system is zero, and the comprehensive energy efficiency of the vehicle system is improved. In addition, the high exhaust temperature can reduce the risk of humid dust clumping in rain, fog and high-humidity environments.

[0032] (4) The horizontal plates of adjacent rows of grid pieces are inclined in opposite directions, and the bending plates of adjacent rows of grid pieces are bent in opposite directions, so that the grid pieces can fully cover the through holes on the bottom and block water while forming a curved air inlet channel.

[0033] (5) The inertial separation unit of the application can adopt a plurality of single-stage straight-flow cyclone tubes arranged side by side, the dust removal amount of the single-stage straight-flow cyclone tube is 8% to 13% of the air inlet volume, the efficiency is 95% to 97%, and the resistance is stably maintained at 800Pa to 1200Pa, without the problem of resistance rise caused by dust accumulation of traditional filter elements.

[0034] (6) The inertial separation unit of the present application can adopt several parallelly arranged double-stage straight-flow cyclone pipes, the dust extraction amount of the double-stage straight-flow cyclone pipe is 15% to 25% of the air intake amount, the efficiency is 99.0% to 99.5%, the resistance is stably maintained at 2000Pa to 2500Pa, and there is no problem of resistance rise caused by dust accumulation of the traditional filter core.

[0035] (7) The grid is integrally inclined, so that the water droplets trapped in the U-shaped groove of the grid piece are guided to the bottom drain hole along the U-shaped groove under the action of gravity, and the grid surface water quickly slides off. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The present application is a constant-resistance maintenance-free air filter for vehicle engine power Figure I ;

[0037] Figure 2 The present application is a constant-resistance maintenance-free air filter for vehicle engine power Figure II ;

[0038] Figure 3 The present application is an exploded view of a constant-resistance maintenance-free air filter for vehicle engine power (intake end view);

[0039] Figure 4 The present application is an exploded view of a constant-resistance maintenance-free air filter for vehicle engine power (intake end view)

[0040] Figure 5 The present application is a component diagram of the air intake waterproof unit;

[0041] Figure 6 The present application is a display diagram of the external structure and bottom drainage structure of the air intake waterproof unit;

[0042] Figure 7 The present application is a sectional view of the air intake waterproof unit;

[0043] Figure 8 The present application is a layout diagram of the grid blade of the air intake waterproof unit;

[0044] Figure 9 The present application is a partial enlarged view of the air intake waterproof grid;

[0045] Figure 10 The present application is a three-dimensional structure diagram of the inertial separation unit;

[0046] Figure 11 The present application is an exploded view of the inertial separation unit

[0047] Figure 12 The present application is a three-dimensional view of the single-stage straight-flow cyclone pipe element of the inertial separation unit;

[0048] Figure 13 Figure 2 is a sectional view of a single-stage straight-flow cyclone element of the inertial separation unit of the present application;

[0049] Figure 14 Figure 5 is a connection diagram of the dust extraction system and the inertial separation unit of the present application;

[0050] Figure 15 Figure 6 is a diagram of the dust extraction system of the present application;

[0051] Figure 16 Figure 7 is a schematic diagram of the principle of inertial dust extraction from the bleed air of the compressor of the combustion engine;

[0052] Figure 17 Figure 8 is a schematic diagram of the principle of inertial dust extraction from the bleed air of the exhaust of the combustion engine;

[0053] Figure 18 Figure 9 is a diagram of the intake connection section of the present application;

[0054] Figure 19 Figure 10 is a three-dimensional view of a two-stage straight-flow cyclone element of the inertial separation unit of the present application;

[0055] Figure 20 Figure 11 is a sectional view of a two-stage straight-flow cyclone element of the inertial separation unit of the present application;

[0056] 1 - intake waterproof unit, 11 - seat frame, 12 - bottom plate, 13 - grille, 14 - sealing gasket, 15 - grille piece, 16 - bending part, 17 - drainage hole;

[0057] 2 - inertial separation unit, 20 - mounting shell, 21 - front sealing gasket, 22 - rear sealing gasket, 23 - straight-flow cyclone group, 231 - single-stage straight-flow cyclone, 2311 - cyclone inlet I, 2312 - guide vane, 2313 - guide tube, 2314 - outlet tube, 2315 - cyclone outlet I, 232 - two-stage straight-flow cyclone, 2321 - cyclone inlet II, 2322 - first cyclone, 2323 - first dust collection cavity, 2324 - first dust extraction port, 2325 - second cyclone, 2326 - second dust collection cavity, 2327 - second dust extraction port, 2328 - cyclone outlet II, 24 - dust extraction port;

[0058] 3 - dust extraction system, 311 - dust extraction pump, 312 - dust inlet, 313 - dust outlet tube, 314 - motor; 321 - combustion engine, 322 - dust extraction tube, 323 - compressor bleed air tube, 324 - exhaust bleed air tube;

[0059] 4 - combustion engine intake connection section. DETAILED DESCRIPTION

[0060] The application will be described in detail below with reference to the drawings and embodiments.

[0061] Embodiment 1

[0062] The embodiment provides a constant-resistance maintenance-free air filter for a vehicle engine, which is shown in the accompanying drawings Figures 1-6 , 10 and 11, comprising an air inlet waterproof unit 1, an inertial separation unit 2, a dust extraction system 3 and an engine air inlet connecting section 4.

[0063] The air inlet waterproof unit 1, the inertial separation unit 2 and the engine air inlet connecting section 4 are sequentially connected.

[0064] The upstream end of the air inlet waterproof unit 1 is provided with a grille 13, and the bottom of the air inlet waterproof unit 1 is provided with a drain hole 17; the grille 13 is used for intercepting water in external air; and the water is drained through the drain hole 17.

[0065] The inertial separation unit 2 is provided with a dust collection cavity and a straight-flow cyclone pipe group 23, the straight-flow cyclone pipe group 23 is used for separating air and dust, the separated dust enters the dust collection cavity, and the separated air enters the engine through the engine air inlet connecting section 4.

[0066] The dust extraction system 3 is connected with the inertial separation unit 2 and communicates with the dust collection cavity, and is used for extracting the dust in the dust collection cavity.

[0067] The constant-resistance maintenance-free air filter provided by the embodiment does not need a filter core, avoids the problem that the resistance of a traditional filter core increases due to dust accumulation, and avoids the problems that an air filter is blocked quickly in a high-dust environment and needs to be frequently maintained; after the dust is separated and directly enters the dust collection cavity, the dust is extracted in time through the dust extraction system 3, so that the air flow channel is not blocked, the air filter can provide appropriate filtering efficiency within the working range of the engine, has the characteristics of low resistance and constant resistance under the condition of a certain air inlet amount, and avoids the problems that the power output of the engine decreases and the fuel consumption increases due to the increase of the air inlet resistance.

[0068] Referring to the accompanying drawings Figure 5 , the air inlet waterproof unit 1 further comprises a bottom plate 12 and a seat frame 11.

[0069] Further, the bottom plate 12 is installed on a vehicle body, and a sealing gasket 14 is arranged along the edge between the bottom plate 12 and the vehicle body.

[0070] One side of the bottom plate 12 is fixedly connected with the inertial separation unit 2; the bottom plate 12 is provided with a through hole, and the seat frame 11 is located on the other side of the bottom plate 12 and surrounds the through hole; the seat frame 11 can be integrally connected with the bottom plate 12, bolted, welded or clamped.

[0071] The grille 13 is fixedly connected in the seat frame 11; the fixed connection can be bolted, welded or clamped.

[0072] And the top of the seat frame 11 protrudes from the height of the bottom plate 12 more than the bottom of the seat frame 11, so that the grid 13 is tilted as a whole; the aforementioned drain hole 17 is arranged at the bottom of the seat frame 11;

[0073] Referring to the accompanying Figures 7-9 The grid 13 includes a plurality of grid pieces 15 arranged in rows and columns, forming N rows and a plurality of columns of grid pieces 15; N≥2, and is a natural number;

[0074] Each row of grid pieces 15 is arranged in the left-right direction, and each column of grid pieces 15 is arranged in front of and behind each other;

[0075] Each grid piece 15 includes an inclined plate and a bent plate; the rear end of the inclined plate is inclined to the left or right, and one end of the bent plate is integrally formed with the rear end of the inclined plate, and the other end is inclined to the rear end of the inclined plate; The inclined plate forms a U-shaped groove;

[0076] The horizontal plates of adjacent rows of grid pieces 15 are inclined in opposite directions, and the bent plates of adjacent rows of grid pieces 15 are bent in opposite directions, forming a curved air inlet passage, and the grid piece 15 can fully cover the through hole on the bottom plate 12 and block the water;

[0077] Further, the front end of the inclined plate of the grid piece 15 of the next row is connected to the rear end of the grid piece 15 of the previous row one by one; specifically, the front end of the inclined plate of the grid piece 15 of the next row is bent to form a connecting plate on the side where the bent part 16 is located, and the connecting plate forms an obtuse angle with the inclined plate; The connecting plate is connected to the side opposite to the side where the U-shaped groove of the inclined plate of the previous row of grid pieces 15 is located; Specifically, it can be welded or bonded.

[0078] Referring to the accompanying Figure 10 And 11 The inertial separation unit 2 further comprises a mounting shell 20, the front and rear ends of the mounting shell 20 are open, and the straight-flow cyclone pipe group 23 is arranged in the mounting shell 20; The straight-flow cyclone pipe group 23 and the mounting shell 20 form the aforementioned dust collection chamber; The left end or the right end of the mounting shell 20 is provided with a dust extraction port 24, the dust extraction port 24 is communicated with the dust collection chamber, and the dust extraction system 3 is connected with the dust extraction port 24; The dust extraction port 24 of the mounting shell 20 is located on the side where the gas turbine air inlet connecting section is located;

[0079] The front end of the mounting shell 20 and the bottom plate 12 of the air inlet waterproof unit 1 are provided with a front sealing gasket 21, and the rear end of the mounting shell and the gas turbine air inlet connecting section 4 are provided with a rear sealing gasket 22;

[0080] Referring to the accompanying Figure 11 And the accompanying Figure 12, the direct flow cyclone pipe group 23 comprises a plurality of single-stage direct flow cyclone pipes 231 arranged side by side, the single-stage direct flow cyclone pipe 231 comprising a guide vane 2312, a guide pipe 2313 and an air outlet pipe 2314; the guide vane 2312 is located in the guide pipe 2313 and at one end of the guide pipe 2313, the guide vane 2312 can rotate in the guide pipe 2313, and the air outlet pipe 2314 is coaxially connected to the other end of the guide pipe 2313; the end of the guide vane 2312 is towards the air inlet waterproof unit 1, so that the end of the guide vane 2312 of the single-stage direct flow cyclone pipe 231 is the cyclone inlet I 2311 and the end of the air outlet pipe 2314 is the cyclone outlet I 2315;

[0081] The dust extraction amount of the single-stage direct flow cyclone pipe 231 is 8% to 13% of the air inlet amount, the efficiency is 95% to 97%, and the resistance is 800 Pa to 1200 Pa.

[0082] Referring to the accompanying drawings Figures 14-17 The dust extraction system 3 can adopt a centrifugal dust extraction pump, use a compressor of a gas turbine to perform ejection dust extraction, or use exhaust gas of a gas turbine to perform ejection dust extraction.

[0083] Referring to the accompanying drawings Figure 15 When the dust extraction system 3 adopts a centrifugal dust extraction pump, the dust extraction system 3 comprises a dust extraction pump 311 and a motor 314; the dust inlet 312 of the dust extraction pump 311 is connected with the dust extraction port 24 of the dust extraction system 3, the dust outlet pipe 313 of the dust extraction pump 311 is towards the atmosphere outside the vehicle, and the axis of the dust outlet pipe 313 is perpendicular to the axis of the dust inlet 312; the dust extraction pump 311 and the motor 314 are electrically connected, the motor 314 drives the dust extraction pump 311 to work, and performs dust extraction.

[0084] Alternatively, a pipeline leading to the atmosphere outside the vehicle is connected at the dust outlet pipe 313 to prevent the discharged dust from being sucked into the filter again.

[0085] Referring to the accompanying drawings Figure 16 When the dust extraction system 3 uses a compressor of a gas turbine to perform ejection dust extraction, the dust extraction system 3 comprises a gas turbine 321, a compressor air guide pipe 323 and an ejection dust extraction pipe 322;

[0086] One end of the compressor air guide pipe 323 is connected with the compressor section of the gas turbine 321, the other end is connected with the ejection dust extraction pipe 322, and the ejection dust extraction pipe 322 is also connected with the dust extraction port 24; 3% to 5% of compressed air is guided to the ejection dust extraction pipe 322 through the compressor air guide pipe 323 at the compressor section of the gas turbine 321, so that the dust in the corresponding gas collecting chamber is discharged into the atmosphere.

[0087] Referring to the accompanying drawings Figure 17When the dust extraction system 3 uses the exhaust gas of the gas turbine to extract dust, the dust extraction system 3 comprises the gas turbine 321, the exhaust gas extraction pipe 324 and the extraction dust pipe 322; one end of the exhaust gas extraction pipe 324 is communicated with the exhaust section of the gas turbine 321, and the other end is connected with the extraction dust pipe 322; 10%-15% of the compressed air is extracted from the exhaust section of the gas turbine 321 to the extraction dust pipe 322 through the exhaust gas extraction pipe 324, and the dust in the corresponding dust collecting cavity is extracted to the atmosphere.

[0088] Referring to the drawings Figure 18 The front end of the gas turbine intake connecting section 4 is provided with a flange, which is fixedly connected with the mounting shell 20 of the inertial separation unit 2, the front end of the gas turbine intake connecting section 4 is a square port, which is matched with the outlet size of the inertial separation unit 2, and the rear end is a circular port, which is matched with the gas turbine intake port, and can be connected with the gas turbine intake port through the flange, the clamp and the like; the gas turbine intake connecting section 4 is used to supply the filtered clean air to the gas turbine.

[0089] The dust extraction system 3 needs to generate an air flow and a vacuum degree which are not less than the set proportion of the intake amount at the dust extraction port of the inertial separation unit 2, for example, the dust extraction vacuum strength of the dust extraction system 3 is not less than 12 times of the inertial separation unit 2. The dust extraction flow required by the inertial separation unit 2 in the embodiment is 480m 3 / h-780m 3 / h, and the dust extraction system 3 needs to generate a vacuum degree of not less than 2.5kPa to meet the dust extraction requirement of the inertial filter for the gas turbine with a rated intake amount of 6000m+ / h.

[0090] Working principle:

[0091] Constant resistance maintenance-free principle: the direct-flow cyclone pipe group 23 is used to replace the traditional filter core, after the air enters the cyclone pipe, the guide vane 2312 drives the airflow to rotate at high speed, and under the action of the centrifugal force, 95%-97% of the dust is thrown to the pipe wall and falls into the dust collecting cavity, the clean air enters the gas turbine through the gas turbine intake connecting section 4, the resistance of the cyclone pipe group is stably maintained at 800Pa-1200Pa, and the resistance rising problem caused by the dust accumulation of the traditional filter core is avoided; and the dust extraction system 3 can clean the dust collecting cavity in real time, eliminate the dust retention, ensure the smoothness of the airflow channel, and avoid the power attenuation and the oil consumption rising of the gas turbine, so that the maintenance-free purpose is achieved, and the air filter can separate the dust above 10 microns in the gas turbine intake, and provide a filtration efficiency of not less than 90% for the standard dust of the engine air filter within the working range of the gas turbine.

[0092] Intake waterproof principle:

[0093] The air inlet waterproof unit 1 realizes high-efficiency waterproof through multiple rows of grid structures. Each grid piece 15 comprises a U-shaped groove composed of an inclined plate and a bent plate, and adjacent rows of grid pieces 15 are arranged in reverse staggered manner to form a curved air inlet channel. When the humid air flows through, the water droplets are intercepted and converged by the U-shaped groove due to inertia impact on the surface of the grid piece 15. The grid is integrally installed on the seat frame 11 in an inclined manner, and the water flow is naturally guided to the bottom drain hole 17 for drainage under the action of gravity.

[0094] Embodiment 2:

[0095] This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, referring to Figs. 2 and 3, Figure 19 and Figs. 4 and 5, Figure 20 The direct-flow cyclone tube group 23 comprises a plurality of double-stage direct-flow cyclone tubes 232 arranged side by side;

[0096] The double-stage direct-flow cyclone tube 232 is formed by connecting two single-stage direct-flow cyclone tubes 231 in series, and comprises a first cyclone tube 2322 and a second cyclone tube 2325;

[0097] The first cyclone tube 2322 and the second cyclone tube 2325 are connected end to end, the end of the first cyclone tube 2322 where the guide vane 2312 is located faces the air inlet waterproof unit 1, and the air outlet pipe 2314 of the second cyclone tube 2325 faces the gas turbine air inlet connecting section 4; so that the end of the first cyclone tube 2322 where the guide vane 2312 is located is the cyclone inlet II 2321, and the end of the second cyclone tube 2325 where the air outlet pipe 2314 is located is the cyclone outlet II 2328;

[0098] Further, an installation shell 20 can be provided, and a plurality of double-stage direct-flow cyclone tubes 232 are installed in the installation shell 20 to form a dust collection cavity with the installation shell 20, and a dust extraction port 24 is provided on the installation shell to extract dust in the dust collection cavity;

[0099] In addition, two parallel installation shells 20, i.e., a first installation shell and a second installation shell, can be provided, a plurality of first cyclone tubes 2322 are installed in the first installation shell to form a first dust collection cavity 2323 with the first installation shell, a first dust extraction port 2324 is provided on the left side or the right side of the first installation shell, a plurality of second cyclone tubes 2325 are installed in the second installation shell to form a second dust collection cavity 2326 with the second installation shell, and a second dust extraction port 2327 is provided on the left side or the right side of the second installation shell; the dust extraction amount of the double-stage direct-flow cyclone tube 232 is 15% to 25% of the air inlet amount, the efficiency is 99.0% to 99.5%, and the resistance is 2000 Pa to 2500 Pa.

[0100] In other specific embodiments, the direct-flow cyclone tube group 23 can also use multi-stage straight-through cyclone tubes, and the dust extraction flow rate of the multi-stage cyclone tube is 10% of the air inlet amount multiplied by the number of stages of the cyclone tube.

[0101] To sum up, the above is only the preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A constant resistance maintenance-free air filter for a vehicle engine, characterized in that: include: Air intake waterproof unit, inertial separation unit, dust extraction system and gas turbine air intake connection section; The air intake waterproof unit, the inertial separation unit and the gas turbine air intake connection section are sealed and connected in sequence; A grille is provided at the upstream end of the air intake waterproof unit, and a drainage hole is provided at the bottom of the air intake waterproof unit; the grille is used to intercept water in the external air; the water is discharged through the drainage hole; The inertial separation unit is provided with a dust collecting chamber and a direct current cyclone tube group. The direct current cyclone tube group is used to separate air and dust. The separated dust enters the dust collecting chamber, and the separated air enters the gas turbine through the gas turbine air intake connection section. The dust extraction system is connected to the inertial separation unit and communicates with the dust collecting chamber, and is used for extracting the dust in the dust collecting chamber.

2. A constant resistance maintenance-free air filter for a vehicle combustion engine as claimed in claim 1, characterized in that: The dust extraction system includes a dust extraction pump, which is connected to the inertial separation unit and communicated with the dust collecting chamber, and is used to extract dust from the dust collecting chamber.

3. A constant resistance maintenance-free air filter for a vehicle combustion engine as claimed in claim 1, characterized in that: The dust extraction system includes the combustion engine, compressor bleed pipe and ejector dust exhaust pipe; One end of the compressor bleed pipe is connected to the compressor section of the combustion engine, and the other end is connected to the ejector dust exhaust pipe. The ejector dust exhaust pipe is also connected to the inertial separation unit and communicates with the dust collecting chamber.

4. A constant resistance maintenance-free air filter for a vehicle combustion engine as claimed in claim 1, characterized in that: The dust extraction system includes the combustion engine, exhaust air duct and ejector dust exhaust pipe; One end of the exhaust bleed pipe is connected to the exhaust section of the combustion engine, and the other end is connected to the ejector dust exhaust pipe. The ejector dust exhaust pipe is also connected to the inertial separation unit and is connected to the dust collecting chamber.

5. A constant resistance maintenance-free air filter for a vehicle combustion engine as claimed in any one of claims 1 to 4, characterized in that: The grid includes a plurality of grid pieces, which are arranged horizontally and vertically to form N rows and columns of grid pieces; N is ≥ 2 and is a natural number; Each row of grille pieces is arranged at intervals along the left-right direction, and each column of grille pieces is connected front to back; Each grille piece includes an inclined plate and a bent plate; the rear end of the inclined plate is inclined to the left or right, one end of the bent plate is integrally formed with the rear end of the inclined plate, and the other end is bent in the inclined direction of the rear end of the inclined plate to form a U-shaped groove with the inclined plate; The horizontal plates of adjacent rows of grille sheets have opposite inclination directions, and the bent plates of adjacent rows of grille sheets have opposite bending directions.

6. A constant resistance maintenance-free air filter for a vehicle combustion engine as claimed in claim 5, characterized in that: The inertial separation unit also includes a mounting shell with front and rear ends opened, and a DC cyclone tube group disposed in the mounting shell; the aforementioned dust collecting chamber is formed between the DC cyclone tube group and the mounting shell; The direct current swirl tube group includes several single-stage direct current swirl tubes arranged in parallel, and the single-stage direct current swirl tubes include guide blades, guide tubes and outlet pipes; the guide blades are located in the guide tubes and at one end of the guide tubes, the guide blades can rotate in the guide tubes, and the outlet pipes are coaxially connected to the other end of the guide tubes.

7. A constant resistance maintenance-free air filter for a vehicle combustion engine as claimed in claim 5, characterized in that: The inertial separation unit also includes a mounting shell with front and rear ends opened, and a DC cyclone tube group disposed in the mounting shell; the aforementioned dust collecting chamber is formed between the DC cyclone tube group and the mounting shell; The DC cyclone group includes a plurality of parallel double-stage DC cyclone tubes; the double-stage DC cyclone tubes include a first cyclone tube and a second cyclone tube connected in series; The first swirl tube and the second swirl tube are connected end to end, the end where the guide vane of the first swirl tube faces the air inlet waterproof unit, and the air outlet pipe of the second swirl tube faces the gas turbine air inlet connecting section.

8. A constant resistance maintenance-free air filter for a vehicle combustion engine as claimed in claim 5, characterized in that: The front end of the inclined plate of the rear row of grille pieces is bent toward the side where the bending portion is located to form a connecting plate, which forms an obtuse angle with the inclined plate; the connecting plate is connected to the side opposite to the U-shaped groove of the inclined plate of the front row of grille pieces.

9. A constant resistance maintenance-free air filter for a vehicle combustion engine as claimed in claim 5, characterized in that: The air intake waterproof unit also includes a base plate and a seat frame; One side of the bottom plate is fixedly connected to the inertial separation unit; a through hole is provided on the bottom plate, and the seat frame is located on the other side of the bottom plate and is arranged around the through hole; the grille is fixedly connected in the seat frame, and the aforementioned drainage hole is provided at the bottom of the seat frame.

10. A constant resistance maintenance-free air filter for a vehicle combustion engine as claimed in claim 9, characterized in that: The height of the top of the seat frame protruding from the bottom plate is greater than the height of the bottom of the seat frame protruding from the bottom plate, and the grille is tilted as a whole.

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