CN212250286U - Air intake system and excavator - Google Patents

Abstract

The utility model provides an air inlet system and an excavator, which relate to the technical field of engineering machinery and comprise an air inlet pipe with an opening on the side wall, a moisture absorption plate with a through hole along the air inlet direction, a rotating shaft and a heater; one end of the rotating shaft is fixedly arranged on the air inlet pipe, and the other end of the rotating shaft is rotatably connected with the moisture absorption plate; the part of the moisture absorption plate is positioned in the air inlet pipe through the opening, the moisture absorption plate can rotate in the circumferential direction by taking the rotating shaft as the shaft, and the included angle between the moisture absorption plate and the outer wall surface of the air inlet pipe at the opening is an obtuse angle; the heater is positioned outside the air inlet pipe and used for heating the part of the moisture absorption plate positioned outside the air inlet pipe. Therefore, the gas entering the engine can be dried, the output performance of the engine can be improved, and meanwhile, the replacement period of the air filter can be reduced.

Description

Air intake system and excavator

Technical Field

The utility model relates to an engineering machine tool technical field particularly, relates to an air intake system and excavator.

Background

The engine is used as a main power source of the hydraulic excavator, and the stable and efficient operation of the engine is of great significance to the whole excavator. The air intake system of the engine is an important component of a power system and provides clean and sufficient air for the engine to participate in combustion. Reducing engine wear is primarily considered from the standpoint of reducing dust entering the engine when meeting the air intake requirements of the engine. It is not to be neglected that the engine operates in a humid environment for a long time, and the influence of humid air on it needs to be considered.

The water vapor and water drops in the existing air intake system directly enter the air filter element through the high-position air guide pipe, so that the air filter element is wet, the service life of the air filter element is shortened, and the overall performance of an engine is also influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the not enough among the above-mentioned prior art, provide an air intake system and excavator to cause air filter life to shorten, the not high problem of engine performance because of the aqueous vapor among the solution current engine air intake system.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

in one aspect of the embodiment of the present invention, an air intake system is provided, which includes an air intake pipe having an opening on a sidewall, a moisture absorption plate having a through hole along an air intake direction, a rotation shaft, and a heater; one end of the rotating shaft is fixedly arranged on the air inlet pipe, and the other end of the rotating shaft is rotatably connected with the moisture absorption plate; the moisture absorption plate at least comprises a first part and a second part which can alternately rotate to the inside of the air inlet pipe through the opening, and an included angle between the plate surface of the moisture absorption plate and the outer wall surface of the air inlet pipe at the opening is an obtuse angle; the heater is positioned outside the air inlet pipe and used for heating the part of the moisture absorption plate positioned outside the air inlet pipe.

Optionally, the projection area of the part of the moisture absorption plate located in the air inlet pipe on the cross section of the air inlet pipe is equal to the cross section area of the air inlet pipe.

Optionally, the first part of the moisture absorption plate is a first disc, and the second part of the moisture absorption plate is a second disc; the areas of the first disc and the second disc are equal; the first disc and the second disc are respectively and rotatably connected with the rotating shaft and are respectively positioned at two sides of the rotating shaft.

Optionally, the moisture absorption plate is a third disc; one end of the rotating shaft is fixedly arranged on the outer wall of the air inlet pipe, and the other end of the rotating shaft is rotatably connected with the circle center of the third disc.

Optionally, the heater is the hot plate, and the hot plate is fixed to be set up in the axis of rotation, and the face and the third disc of hot plate are located the outside quotation of intake pipe and correspond.

Optionally, the rotating shaft comprises a rotating shaft body and a bearing, wherein one end of the rotating shaft body is fixedly arranged on the air inlet pipe, and the bearing is sleeved on the periphery of the rotating shaft body; the moisture absorption plate is rotatably connected with the other end of the rotating shaft body through a bearing.

Optionally, a limiting member is further disposed at the other end of the rotating shaft body, and the limiting member abuts against the bearing and is used for limiting the axial movement of the bearing along the rotating shaft body.

Optionally, an air prefilter is further disposed at the air inlet of the air inlet pipe.

Optionally, an air filter is further disposed between the moisture absorption plate and the engine.

The embodiment of the utility model provides a further aspect provides an excavator, including any kind of air intake system of above-mentioned.

The beneficial effects of the utility model include:

the utility model provides an air inlet system, which comprises an air inlet pipe and a moisture absorption plate. In order to control the humidity of the gas entering the engine, an opening may be formed in a sidewall of the intake pipe, and at the same time, a portion of the moisture absorption plate extends into the intake pipe through the opening, and at the same time, in order to fix the moisture absorption plate, a rotation shaft may be further provided, one end of the rotation shaft is fixedly disposed on the intake pipe, and the other end of the rotation shaft is correspondingly connected with the moisture absorption plate, and the connection mode is a rotational connection, when the moisture absorption plate rotates, the first portion and the second portion of the moisture absorption plate may rotate circumferentially around the other end of the rotation shaft, thereby achieving the alternate entry into the intake pipe, the opening needs to be completely correspondingly matched to accommodate the moisture absorption plate capable of achieving 360-degree circumferential rotation, so that the portion of the moisture absorption plate located in the intake pipe can freely rotate from the inside of the intake pipe to the outside of the intake pipe, and after moisture of the gas sucked in, shift to the outside of intake pipe, thereby heat it through the heater that sets up in the intake pipe outside and make its dry back, rotate the inside that gets into the intake pipe again and continue to carry out the drying to inspiratory air to can dry the gas that gets into the engine, not only can improve the output performance of engine, simultaneously, also can reduce air cleaner's change cycle.

The utility model also provides an excavator, on being applied to the excavator with foretell air intake system, the moisture absorption plate that can set up through the slope carries out the drying to admitting air of engine, and the engine of effectual improvement excavator can be at the output performance of during operation, improves the operating performance and the efficiency of excavator.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of an air intake system according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of an air intake system according to an embodiment of the present invention;

fig. 3 is a third schematic structural diagram of an air intake system according to an embodiment of the present invention;

fig. 4 is a fourth schematic structural diagram of an air intake system according to an embodiment of the present invention.

Icon: 100-an air inlet pipe; 200-a rotating shaft; 210-a stop; 300-a moisture absorption plate; 310-a first disc; 320-a second disc; 330-a third disc; 400-a heater; 500-air prefilter.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. It should be noted that, in the case of no conflict, various features in the embodiments of the present invention may be combined with each other, and the combined embodiments are still within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

With the rapid development of economy, infrastructure is also rapidly promoted, and in various project constructions, large-scale engineering machinery has the great advantages of high operation efficiency, stable operation and the like compared with other machinery, so that the application of the large-scale engineering machinery is more and more common. Among them, a power mechanism such as an internal combustion engine is an important component of a large-sized construction machine, and when the power mechanism works, a large amount of energy is released by mixed combustion of fuel oil and intake air, and then converted into mechanical energy as a driving force. In order to improve the working performance of the engine and keep the engine in a high and reasonable working condition for power output, the quality of the intake air needs to be controlled, and generally, indexes for reflecting the quality of the intake air mainly comprise temperature, impurities, humidity and the like. When the air inlet quality of an engine is improved by the existing engineering machinery, the working environment of the engineering machinery is mainly considered, and impurities contained in air are removed, so that the probability of abrasion and damage caused by the fact that air with impurity particles is sucked is avoided. However, the engine runs in a humid environment for a long time, and water vapor and water drops in the air inlet system directly enter the air filter element through the high-position air guide pipe, so that the air filter element is humid, the service life of the air filter element is shortened, and the performance of the whole engine is influenced. Therefore, the air intake system and the excavator are provided, so that the working performance of the engine is improved from the aspect of improving the quality of the engine during air intake, and the working efficiency of the engineering machinery during construction is improved.

In one aspect of the embodiment of the present invention, an air intake system is provided, which includes an air intake pipe 100 having an opening on a sidewall thereof, a moisture absorption plate 300 having a through hole along an air intake direction, a rotation shaft 200, and a heater 400; one end of the rotation shaft 200 is fixedly disposed on the air inlet pipe 100, and the other end is rotatably connected with the moisture absorption plate 300; the moisture absorption plate 300 at least comprises a first part and a second part which can alternately rotate to the inside of the air inlet pipe 100 through the opening, and an included angle between the plate surface of the moisture absorption plate 300 and the outer wall surface of the air inlet pipe 100 at the opening is an obtuse angle; the heater 400 is located outside the intake duct 100 to heat a portion of the suction plate 300 located outside the intake duct 100.

Illustratively, an intake system of the engine includes an intake pipe 100, which mainly communicates the engine with outside air. That is, one end of the intake pipe 100 is an intake port, and the other end is connected to the engine. In order to control the humidity of the gas entering the engine, an opening may be opened on a sidewall of the intake pipe 100, and a portion of the moisture absorption plate 300 may extend into the intake pipe 100 through the opening, and in order to fix the moisture absorption plate 300, a rotation shaft 200 may be further provided, one end of the rotation shaft 200 is fixedly disposed on the intake pipe 100, and the other end of the rotation shaft 200 is correspondingly connected with the moisture absorption plate 300 in a rotatable manner, that is, as shown in fig. 1, when the moisture absorption plate 300 rotates, the rotation shaft 200 may rotate circumferentially around the other end of the rotation shaft 200, that is, the opening completely and correspondingly accommodates the moisture absorption plate 300 capable of rotating circumferentially by 360 degrees, so that the portion of the moisture absorption plate 300 located in the intake pipe 100 can freely rotate from the inside of the intake pipe 100 to the outside of the intake pipe 100, thereby absorbing the moisture of the gas sucked in the intake pipe 100, the air is transferred to the outside of the intake duct 100, heated by the heater 400 provided outside the intake duct 100 to be dried, and then rotated again into the inside of the intake duct 100 to continuously dry the sucked air.

Wherein, in order to facilitate the air intake of the engine, the moisture absorption plate 300 can be further provided with through holes, and the aperture, the number, the shape and the like of the through holes can be reasonably set according to actual working conditions. In order to further improve the automatic control of the moisture absorption plate 300 to transfer the moisture in the air inlet pipe 100 to the outside, the moisture absorption plate 300 may be tilted by a certain angle when being disposed on the rotating shaft 200, as shown in fig. 1, that is, an included angle between the moisture absorption plate and an outer wall surface of the air inlet pipe 100 at the opening is an obtuse angle, and at this time, the height of the portion of the moisture absorption plate 300 in the air inlet pipe 100 is higher than the height of the portion of the moisture absorption plate 300 outside the air inlet pipe 100. With the continuous operation of the engine, the gas continuously flows from the air inlet of the air inlet pipe 100 along the pipeline of the air inlet pipe 100, is dried by the moisture absorption plate 300 (i.e. the moisture in the air is absorbed by the moisture absorption plate 300), and then enters the interior of the engine to participate in combustion. The moisture in the intake air is continuously adsorbed by the portion of the moisture absorption plate 300 located in the intake duct 100, and the weight of the moisture absorption plate 300 is gradually increased, while the weight of the portion located outside the intake duct 100 is almost unchanged. When the moisture absorbed by the portion of the air inlet pipe 100 reaches a predetermined value (i.e. the weight of the portion reaches a predetermined weight), it will generate a rotation moment on the moisture absorption plate 300, so as to urge the moisture absorption plate 300 to rotate clockwise or counterclockwise around the rotation axis 200 as the rotation center until the moisture absorption portion rotates to the outside of the air inlet pipe 100 through the opening on the sidewall of the air inlet pipe 100, and the dry moisture absorption plate 300 portion originally located outside the air inlet pipe 100 will rotate to enter the inside of the air inlet pipe 100 through the opening on the sidewall of the air inlet pipe 100, i.e. along with the increase of the gravity of the portion located inside the air inlet pipe 100, the portions located inside and outside the air inlet pipe 100 will rotate under the action of force to realize the exchange. The portion where the moisture is adsorbed is heated by the heater 400 located outside the air inlet duct 100, so that the moisture adsorbed is rapidly evaporated, and the drying is performed at a higher speed, and the weight of the portion where the moisture absorption plate 300 is located inside the air inlet duct 100 is reduced again after the drying until the weight of the portion where the moisture absorption plate 300 is located inside the air inlet duct 100 reaches a predetermined weight again, and the positions of the two (the first portion and the second portion) are exchanged again, and after the exchange, the heater 400 continuously dries the portion located outside the air inlet duct 100. Thereby achieving continuous drying of the engine intake air. And the moisture absorption plate 300 does not need to be additionally provided with a driving member in the circulating rotation, so that the energy consumption can be saved, the structure of the moisture absorption part can be further simplified, and the installation is convenient.

It should be noted that, first, the moisture absorption plate 300 may be a disc shape, an oval shape, or a structure of two oppositely disposed discs and a rotating shaft as shown in fig. 2, and the present embodiment does not limit the specific shape thereof, as long as the position of the inside and the outside of the air inlet pipe 100 can be automatically exchanged by the change of the weight when the moisture absorption plate is disposed obliquely.

Secondly, one end of the rotation shaft 200 may be fixedly disposed on the intake duct 100, and the other end thereof may be rotatably connected to only the moisture absorption plate 300, and in addition, it may be simultaneously fixedly disposed on the intake duct 100 for the convenience of stability of the moisture absorption plate 300.

Third, the heater 400 may dry the moisture absorption plate 300 absorbing a large amount of moisture by using its own high temperature operation state. Specifically, the energy may be in a structural form of converting electric energy into heat energy, or may be energy carried in a heat dissipation system of an engine, which is not limited in the present application. As for the arrangement position thereof, it may be fixedly arranged on the intake duct 100, for example, on the rotary shaft 200 (shown in fig. 1). Or may be provided on a vehicle body or a protective cover of an engine, etc., as long as the heating portion thereof can correspond to the moisture absorption plate 300 portion located outside the intake duct 100 and can provide a quick drying effect thereto.

Fourth, the moisture absorption plate 300 is a member capable of absorbing moisture in the air, and may be made of a material capable of absorbing moisture, such as water absorbent resin, sponge, and the like.

Optionally, a projected area of a portion of the moisture absorption plate 300 located in the air inlet pipe 100 on the cross section of the air inlet pipe 100 is equal to the cross section of the air inlet pipe 100.

For example, in order to further improve the moisture absorption effect of the moisture absorption plate 300 on the intake air in the intake pipe 100, the portion of the moisture absorption plate located in the intake pipe 100 may also be made to cover the radial intake area as much as possible, that is, all the intake air portions need to pass through the moisture absorption plate 300 as much as possible. For example, as shown in fig. 2, a portion of the moisture absorption plate 300 located in the intake pipe 100 completely fills a cross section of a duct of the intake pipe 100, that is, an area formed by a projection of the portion of the moisture absorption plate 300 located in the intake pipe 100 on a radial section of the intake pipe 100 should be equal to an area of the radial section of the intake pipe 100, so that the moisture absorption plate 300 at least completely covers an intake passage of the intake pipe 100, thereby sufficiently drying intake air of the engine in advance, further ensuring a drying degree of gas entering the engine to participate in combustion, and simultaneously, effectively improving output performance of the engine. Meanwhile, a plurality of through holes should be formed in the moisture absorption plate 300, or the moisture absorption plate 300 is arranged to be of a net structure, so that moisture carried in the air is fully absorbed on the basis of ensuring the air intake.

Optionally, the first part of the moisture absorption plate 300 is a first disk 310, and the second part of the moisture absorption plate 300 is a second disk 320; the first disk 310 and the second disk 320 are equal in area; the first disk 310 and the second disk 320 are respectively rotatably connected to the rotating shaft 200 and are respectively located at both sides of the rotating shaft 200.

Illustratively, as shown in fig. 2, the moisture absorption plate 300 may be formed by two disks symmetrically disposed along the rotation axis 200. One side of the first disc 310 may be fixedly coupled to one side of the second disc 320, and a coupling portion of the first disc and the second disc is rotatably coupled to the rotation shaft 200. In order to facilitate accurate position circulation, the dried disc can be accurately positioned at the original position of the moisture absorption disc by rotation, and the connection line of the circle centers of the dried disc and the moisture absorption disc can pass through the rotating shaft 200. This kind of setting structure can be when realizing that the circulation lasts carries out the drying to the inside admit air of intake pipe 100, and also effectual save material reduces the cost of manufacturing.

Furthermore, in other embodiments, the first disk 310 and the second disk 320 may also be unequal in area. At this time, the opening provided on the sidewall of the inlet duct 100 should be able to allow a disc having a large area therein to pass therethrough. In order to improve the adsorption effect, the smaller disk in the area can be fully distributed in the air inlet channel of the air inlet pipe 100, when the smaller disk and the larger disk are exchanged, the larger disk is accommodated conveniently, an annular groove can be extended outwards from the side wall of the air inlet pipe 100 along the disc surface of the larger disk, and the opening of the groove corresponds to the disk. In other embodiments of the present application, the arrangement of the air inlet pipe 100 may be referred to, and the structural strength of the air inlet pipe 100 is ensured, and the moisture absorption plate 300 may also fully cover the air inlet passage of the air inlet pipe 100.

Optionally, the moisture absorption plate 300 is a third disc 330; one end of the rotation shaft 200 is fixedly disposed on the outer wall of the air inlet pipe 100, and the other end is rotatably connected to the center of the third disc 330.

For example, as shown in fig. 3, when the moisture absorption plate 300 is a third disc 330, the center of the third disc is a position rotatably connected to the rotating shaft 200. The rotation shaft 200 is provided at the outside of the intake duct 100, thereby improving convenience in installation setting. At this time, a part of the third disk 330 extends into the inside of the air inlet pipe 100 from the opening opened on the outer wall of the air inlet pipe 100, and in order to ensure the drying effect, the part extending into the air inlet pipe 100 is required to cover the air inlet passage of the air inlet pipe 100. The third disc 330 containing the water-absorbing material absorbs the moisture of the air in the path of the intake duct 100. When the weight of the moisture absorbed by the third disc 330 reaches a certain level, the tangential force generated by the deviation of the center of gravity of the tilted third disc 330 drives the third disc 330 to rotate through the connection of the rotating shaft 200. At the same time, the heater 400 starts to work to dry the moisture in the water absorbing material, thereby achieving the effect of cyclic dehumidification.

It should be noted that the operation mode of the heater 400 may be a continuous operation, that is, the moisture absorption plate 300 outside the air inlet duct 100 may be kept dry. The humidity sensor may be a sensor provided in the moisture absorption plate 300 to detect the humidity inside the moisture absorption plate 300. When the detected value of the sensor exceeds a predetermined value, the heater 400 is controlled to start operating to dry the same.

Optionally, the heater 400 is a heating plate, the heating plate is fixedly disposed on the rotating shaft 200, and the plate surface of the heating plate corresponds to the disc surface of the third disc 330 located outside the air inlet pipe 100.

Illustratively, as shown in fig. 2 and 3, the heater 400 is a heating plate corresponding to a disc surface of the third disc 330 located outside the intake duct 100, so that the portion of the third disc 330 located outside the intake duct 100 can be effectively dried. To ensure that the drying degree of the moisture absorption plate 300 newly entering the air inlet pipe 100 meets the requirement in the next rotation cycle of the disc.

Optionally, the rotating shaft 200 includes a rotating shaft 200 body with one end fixedly disposed on the air inlet pipe 100 and a bearing sleeved on the periphery of the rotating shaft 200 body; the moisture absorption plate 300 is rotatably connected to the other end of the body of the rotation shaft 200 through a bearing.

For example, in order to further improve the smoothness of the rotation of the moisture absorption plate 300 and the rotation shaft 200, a bearing may be provided on the outer circumference of the rotation shaft 200, that is, an inner ring of the bearing is fixedly connected to the rotation shaft 200, and an outer ring of the bearing is fixedly connected to the moisture absorption plate 300. It is thus possible to ensure that the moisture absorption plate 300 can be rotated at an appropriate angle by the driving force generated when it is obliquely disposed, under appropriate conditions. In addition, corresponding dampers can be arranged on the moisture absorption plate 300 and the rotating shaft 200, and can be used for balancing tangential force generated by airflow when the engine is in air inlet, so that the moisture absorption plate 300 is prevented from rotating undesirably.

Optionally, a limiting member 210 is further disposed at the other end of the rotating shaft 200 body, and the limiting member 210 abuts against the bearing to limit the axial movement of the bearing along the rotating shaft 200 body.

For example, in order to improve the connection stability between the rotating shaft 200 and the third disc 330, a stopper 210 may be further disposed at one end of the rotating shaft 200, for example, as shown in fig. 1, an end cap may be disposed below the third disc 330, and may be abutted against a bearing, so as to prevent the bearing from moving along the axial direction of the rotating shaft 200 body and causing the moisture absorption plate 300 to be separated from the rotating shaft 200. The stability of the structure is effectively improved.

Optionally, an air pre-filter 500 is further disposed at the air inlet of the air inlet pipe 100.

For example, as shown in fig. 4, in order to further improve the cleanliness of air when the engine is intake, an air pre-filter 500 may be provided at the air intake portion of the intake duct 100.

Optionally, an air cleaner is further provided between the moisture absorption plate 300 and the engine.

For example, in order to further improve the cleanliness of air when the engine is being supplied with air, an air cleaner may be further provided between the moisture absorption plate 300 and the engine. Meanwhile, due to the fact that the moisture absorption plate 300 can pre-dry the air inlet of the engine, the air filter can be effectively protected, the replacement period of the air filter is shortened, and the service life of the air filter is prolonged.

The embodiment of the utility model provides a further aspect provides an excavator, including any kind of air intake system of above-mentioned.

By applying the air intake system to the excavator, the intake air of the engine can be dried through the moisture absorption plate 300 which is obliquely arranged, so that the output performance of the engine of the excavator during working is effectively improved, and the working performance and efficiency of the excavator are improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by 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 (10)

1. An air inlet system is characterized by comprising an air inlet pipe, a moisture absorption plate, a rotating shaft and a heater, wherein an opening is formed in the side wall of the air inlet pipe; one end of the rotating shaft is fixedly arranged on the air inlet pipe, and the other end of the rotating shaft is rotatably connected with the moisture absorption plate; the moisture absorption plate at least comprises a first part and a second part which can alternately rotate to the inside of the air inlet pipe through the opening, and an included angle between the plate surface of the moisture absorption plate and the outer wall surface of the air inlet pipe at the opening is an obtuse angle; the heater is positioned outside the air inlet pipe and used for heating the part of the moisture absorption plate, which is positioned outside the air inlet pipe.

2. The air intake system of claim 1, wherein a projected area of a portion of the moisture absorption plate located in the intake pipe on a cross-sectional area of the intake pipe is equal to a cross-sectional area of the intake pipe.

3. The air intake system of claim 2, wherein the first portion of the moisture absorption plate is a first disk and the second portion of the moisture absorption plate is a second disk; the areas of the first disk and the second disk are equal; the first disc and the second disc are respectively and rotatably connected with the rotating shaft and are respectively positioned on two sides of the rotating shaft.

4. The air intake system of claim 2, wherein the moisture absorption plate is a third disk; one end of the rotating shaft is fixedly arranged on the outer wall of the air inlet pipe, and the other end of the rotating shaft is rotatably connected with the circle center of the third disc.

5. The air intake system of claim 4, wherein the heater is a heating plate, the heating plate is fixedly arranged on the rotating shaft, and the plate surface of the heating plate corresponds to the disc surface of the third disc positioned outside the air intake pipe.

6. The air intake system of claim 1, wherein the rotating shaft includes a rotating shaft body having one end fixedly disposed on the air intake pipe and a bearing fitted around an outer periphery of the rotating shaft body; the moisture absorption plate is rotatably connected with the other end of the rotating shaft body through the bearing.

7. The intake system according to claim 6, wherein a stopper is further provided at the other end portion of the rotating shaft body, the stopper abutting against the bearing for restricting the axial movement of the bearing along the rotating shaft body.

8. The intake system of claim 1, further comprising an air precleaner disposed at the intake of the intake pipe.

9. The air intake system of claim 1, further comprising an air cleaner disposed between the breather plate and the engine.

10. An excavator comprising an air intake system as claimed in any one of claims 1 to 9.

Images