CN215692411U

CN215692411U - Air inlet filter with straight-through cyclone tube

Info

Publication number: CN215692411U
Application number: CN202121491448.XU
Authority: CN
Inventors: 费小生
Original assignee: Hangzhou Loongengine Technology Co ltd
Current assignee: Hangzhou Loongengine Technology Co ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2022-02-01
Anticipated expiration: 2031-07-01

Abstract

The utility model discloses an air inlet filter with a straight-through cyclone tube, which comprises a shell and the straight-through cyclone tube, wherein the shell is provided with an installation cavity and an air outlet cavity; the straight-through type cyclone tube comprises a tube body, blades and a base, wherein the blades are arranged on the upper side of the tube body and are arranged in a rotating mode, the base is arranged on the lower side of the tube body, an air outlet is formed in the lower side of the base, an upward extending boss is arranged on the upper side of the base, and the outer diameter of the boss is smaller than the inner diameter of the tube body; a dust exhaust port is arranged on the side wall of the cylinder body on one side of the boss; the upper end surface of the cylinder body is provided with an air inlet; the straight-through type cyclone tube is arranged in the mounting cavity, the air inlet is connected with the air inlet, and the dust exhaust port is connected with the dust outlet through the mounting cavity; the air outlet is connected with the air outlet. And improve the separation effect and the dust removal effect.

Description

Air inlet filter with straight-through cyclone tube

Technical Field

The utility model relates to the technical field of filters, in particular to an air inlet filter with a straight-through cyclone tube.

Background

Swirl tubes have been widely used in dust removal equipment and in vehicle dust extraction systems, and in fuel and gas engine air intake systems. The cyclone tube separates dust by centrifugal sedimentation, so that a dust removal effect is achieved; when the dust-containing gas enters the cyclone tube from the gas inlet at a certain speed to form rotary motion, the gas flow forms an outer cyclone flow from outside to inside in the period; the centrifugal force generated in the strong rotation process throws dust particles with density far higher than that of gas to the wall of the vessel; once in contact with the wall, the dust particles lose their inertia and fall down the wall into the collecting tray by the momentum of the inlet velocity and their own weight.

The separation effect of the straight cyclone tube is generally below 80%. However, at idle speed and low rotation speed of the engine, the separation effect of the straight-through cyclone tube is low, generally about 60-70%; if the reentrant cyclone tube is adopted, although the separation effect can be about 80% at idle speed and low rotating speed, and can be about 90% at high torque and high rotating speed. Under the working condition of severe air inlet environment, the whole air inlet system including an air filter element is often blocked, and the filter element needs to be frequently replaced, so that the working efficiency of equipment is seriously influenced; frequent replacement of the filter element greatly increases the abrasion probability of the engine piston and the cylinder body, thereby affecting the safety of equipment operation. There is therefore a need for an intake air filter with a high separation effect.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems in the prior art, the present invention provides an air intake filter with a straight cyclone tube, and improves the separation effect and dust removal effect.

The utility model discloses an air inlet filter with a straight-through cyclone tube, which comprises a shell and the straight-through cyclone tube, wherein the shell is provided with an installation cavity and an air outlet cavity; the straight-through type cyclone tube comprises a tube body, blades and a base, wherein the blades are arranged on the upper side of the tube body and are arranged in a rotating mode, the base is arranged on the lower side of the tube body, an air outlet is formed in the lower side of the base, an upward extending boss is arranged on the upper side of the base, and the outer diameter of the boss is smaller than the inner diameter of the tube body; a dust exhaust port is arranged on the side wall of the cylinder body on one side of the boss; the upper end surface of the cylinder body is provided with an air inlet; the straight-through type cyclone tube is arranged in the mounting cavity, the air inlet is connected with the air inlet, and the dust exhaust port is connected with the dust outlet through the mounting cavity; the air outlet is connected with the air outlet.

Preferably, a guide column is arranged on the inner side of the cylinder, and the blades are rotatably arranged between the inner side wall of the cylinder and the guide column.

Preferably, the upper end of the flow guide column is provided with a fillet or a chamfer.

Preferably, the plurality of blades are uniformly distributed between the inner side wall of the cylinder and the guide column.

Preferably, in the projection of the bottom surface of the cylinder, the single blade takes the rotating shaft as the center, the included angle between the two ends of the front blade of the blade is 3 degrees, the minimum included angle between the front blade and the rear blade is 61 degrees, and the included angle between the two ends of the rear blade is 10 degrees.

Preferably, the axial height of the blade is 17.1mm, and the horizontal length of the profile is 8.4 mm.

Preferably, the air inlet and outlet of the lower end surface of the base upwards penetrates through the boss.

Preferably, the outer diameter of the boss is smaller than the outer diameter of the base.

Preferably, the cylinder, the blades and the guide column are integrated.

Compared with the prior art, the utility model has the beneficial effects that: the inlet air enters the air inlet of the cyclone tube from the air inlet, and forms rotary motion when passing through the blades, dust particles with higher density move along the inner side wall of the cylinder, enter the dust discharge port from the outer side wall of the boss, and are discharged from the dust outlet through the installation cavity, so that the dust removal effect is achieved; the outer diameter of the boss is smaller than the inner diameter of the cylinder, so that the inlet air enters the air outlet from the upper end face of the boss, and the purified air is discharged from the air outlet. And the dust particles have high density, move along the inner side wall of the cylinder and are discharged from the dust discharge port, so that the separation effect is improved.

Drawings

FIG. 1 is a schematic view of the intake filter of the present invention;

FIG. 2 is a schematic view of the structure of a straight-through cyclone tube;

FIG. 3 is an exploded view of the swirl tube;

FIG. 4 is a cross-sectional view of the swirl tube;

FIG. 5 is a schematic view of the distribution of the blades;

fig. 6 is a schematic view of the structure of the blade.

The labels in the figure are: 1 cyclone tube, 2 barrels, 3 bases, 4 dust exhaust ports, 5 blades, 6 flow guide columns, 7 separation chambers, 8 dust exhaust chambers, 9 bosses, 11 air inlets, 12 air outlets, 21 air inlets, 22 air outlets, 23 dust outlets, 24 installation chambers and 25 air outlet chambers.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The utility model is described in further detail below with reference to the attached drawing figures:

an air inlet filter provided with a straight-through cyclone tube is shown in figure 1 and comprises a shell and a straight-through cyclone tube 1, wherein the shell is provided with a mounting cavity 24 and an air outlet cavity 25, the side wall of the mounting cavity 24 is provided with a dust outlet 23, the lower side of the air outlet cavity 25 is provided with an air outlet 22, the upper side of the mounting cavity 24 is provided with an air inlet 21, as shown in figures 2, 3 and 4, the cyclone tube 1 comprises a barrel body 2, blades 5 and a base 3, the inner side wall of the upper side of the barrel body 2 is provided with the blades 5, the blades 5 are rotatably arranged, the lower side of the barrel body 2 is provided with the base 3, the lower side of the base 3 is provided with an air outlet 12, the upper side of the base is provided with a boss 9 extending upwards, and the outer diameter of the boss 9 is smaller than the inner diameter of the barrel body 2; a dust exhaust port 4 is arranged on the side wall of the cylinder body at one side of the boss 9; the upper end surface of the cylinder body 2 is provided with an air inlet 11; the cyclone tube 1 is arranged in the mounting cavity 24, the air inlet 11 is connected with the air inlet 21, and the dust exhaust port 4 is connected with the dust outlet 23 through the mounting cavity 24; the air outlet 12 is connected with an air outlet 21.

The air enters the air inlet of the cyclone tube 1 from the air inlet, and forms rotary motion when passing through the blades, dust particles with higher density move along the inner side wall of the cylinder, enter the dust discharge port from the outer side wall of the boss, and are discharged from the dust outlet through the installation cavity, so that the dust removal effect is achieved; the outer diameter of the boss is smaller than the inner diameter of the cylinder, so that the inlet air enters the air outlet from the upper end face of the boss, and the purified air is discharged from the air outlet. And the dust particles have high density, move along the inner side wall of the cylinder and are discharged from the dust discharge port, so that the separation effect is improved.

The inner side of the cylinder 1 can be provided with a guide post 6, and the blades 5 can be rotatably arranged between the inner side wall of the cylinder 1 and the guide post 6. The upper end of the guide post 6 can be provided with a round angle or a chamfer angle to reduce wind resistance.

As shown in fig. 5, the plurality of blades are uniformly distributed between the inner side wall of the cylinder and the guide post. Specifically, 5 blades are provided, but not limited thereto.

FIG. 6 illustrates the configuration of a blade in one embodiment. In the A and B drawings, the axial height of the blade is 17.1mm, and the horizontal length of the profile is 8.4 mm. The A diagram is a structural schematic diagram of a plurality of blades and a guide column, and the B diagram is a structural schematic diagram of a single blade. And the C figure is a projection view of a single blade on the bottom surface of the cylinder, the rotating shaft is used as the center, the included angle of the two ends of the front edge of the blade is 3 degrees, the minimum included angle of the front edge and the rear edge of the blade is 61 degrees, and the included angle of the two ends of the rear edge of the blade is 10 degrees. By the size of the blade, the separation effect can be improved by 86-90%; when a fan or an engine tail gas injection system is installed, the separation effect can be improved to 97%. The straight-through type cyclone tube with small volume, low resistance and high efficiency improves the running environment of the engine under all working conditions of idle speed, low rotating speed, high torque, maximum rotating speed and the like of the engine, ensures that the engine runs more safely and effectively, and prolongs the service life of the engine.

The air inlet and outlet of the lower end face of the base upwards penetrates through the boss to form an air outlet channel. The outer diameter of the boss is smaller than that of the base. The shape of the upper part of the bracket is gradually enlarged from top to bottom. The barrel, the blades and the flow guide column can be integrated, so that the quality of a finished product is improved. A plurality of swirl tubes, such as 20-60 swirl tubes, are disposed in the mounting chamber 24.

According to the utility model, the cavity in the cylinder body is divided into a separation cavity 7 and a dust exhaust cavity 8 through the boss, and the blades rotate the inlet air; in the separation cavity 7 at the lower side of the blade, dust moves along the inner side wall of the cylinder under the action of centrifugal force; the dust exhaust chamber 8 is used for solid-gas separation.

In one embodiment, the flow rate of the air inlet is 600 cubic meters per hour, the air inlet resistance is 2kPa, the flow rate of the monomer cyclone tube is 10 cubic meters per hour, and the wind speed is not more than 30 meters per second. Tests show that when the flow rate is 400 cubic meters per hour, the resistance is 1kPa, the flow rate of the monomer cyclone tube is 6.7 cubic meters per hour, and the separation effect is 91 percent; 600 cubic meters per hour, the resistance is 2kPa, the flow rate of the monomer cyclone tube is 10 cubic meters per hour, the wind speed is 26 meters per second, and the separation effect is 93 percent. The air is injected by a fan, the injection air volume is controlled within 10% of the air inlet air volume, and the separation effect is 94% and 97% respectively under the flow rates of 400 and 600.

Under the condition of ensuring to meet the normal air inlet requirement of the engine, under the condition of the most reasonable air inlet negative pressure (air inlet resistance), the miniaturization of the straight-through cyclone tube and the maximization (91% -97%) of the separation effect are realized, and no matter the engine is in the whole processes of idling, low rotating speed, high torque, high rotating speed and the like, the damage of the severe dust environment to an air inlet system of the engine is effectively avoided, so that the running environment of the engine is improved, the engine runs more safely and effectively, and the service life of the engine is prolonged. Meanwhile, the replacement time of the filter element is greatly prolonged, the demand of filter element and filter paper is greatly reduced, the consumption of wood for the filter paper is greatly reduced, and the environment is protected.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air inlet filter provided with a straight-through cyclone tube is characterized by comprising a shell and the straight-through cyclone tube, wherein the shell is provided with a mounting cavity and an air outlet cavity, the side wall of the mounting cavity is provided with a dust outlet, the lower side of the air outlet cavity is provided with an air outlet,

an air inlet is formed in the upper side of the mounting cavity;

the straight-through cyclone tube comprises a cylinder body, blades and a base,

the upper side of the barrel is provided with blades which are arranged in a rotating manner, the lower side of the barrel is provided with a base, the lower side of the base is provided with an air outlet, the upper side of the base is provided with a boss extending upwards, and the outer diameter of the boss is smaller than the inner diameter of the barrel; a dust exhaust port is arranged on the side wall of the cylinder body on one side of the boss; the upper end surface of the cylinder body is provided with an air inlet;

the straight-through cyclone tube is arranged in the mounting cavity,

the air inlet is connected with the air inlet, and the dust exhaust port is connected with the dust outlet through the mounting cavity;

the air outlet is connected with the air outlet.

2. The air intake filter with a straight-through cyclone tube as claimed in claim 1, wherein the inner side of the barrel is provided with a guide post, and the blades are rotatably disposed between the inner side wall of the barrel and the guide post.

3. The air intake filter with the straight-through cyclone tube as claimed in claim 2, wherein the upper end of the flow guiding column is provided with a round angle or a chamfer.

4. The air intake filter with a straight cyclone tube of claim 3, wherein the plurality of blades are uniformly distributed between the inner sidewall of the barrel and the guide post.

5. The air intake filter with a straight cyclone tube as claimed in claim 2, wherein the single blade is centered on the rotation axis in the projection of the bottom surface of the cylindrical body, the angle between the front edge of the blade is 3 degrees, the minimum angle between the front edge and the rear edge is 61 degrees, and the angle between the rear edge is 10 degrees.

6. An air-intake filter with a straight cyclone tube according to claim 5 wherein the blades have an axial height of 17.1mm and a profile horizontal length of 8.4 mm.

7. The air intake filter with a straight cyclone tube as claimed in claim 2, wherein the air inlet and outlet of the lower end surface of the base extends upward through the boss.

8. An air intake filter with a straight cyclone tube as claimed in claim 1, wherein the outer diameter of the boss is smaller than the outer diameter of the base.

9. The air intake filter with a straight cyclone tube of claim 1 wherein the barrel, vanes and deflector post are a unitary piece.