阅读说明：本技术 挖掘机空气过滤系统 (Air filtering system of excavator ) 是由 程昭荣 苏永志 宾旭洲 姜旭东 刘剑 于 2019-11-29 设计创作，主要内容包括：本发明涉及挖掘机空气过滤系统,为解决现有挖掘机空气过滤系统的进气胶管容易老化、滤芯维护频率高的问题；提供一种挖掘机空气过滤系统,其中水散热器位于发动机右侧,消声器位于发动机左侧,涡轮增压器位于发动机后侧,空气过滤装置包括空气过滤器和油浴式预滤器,空气过滤器和油浴式预滤器布置在发动机舱的外部且位于水散热器的前侧,进气胶管自空气过滤器的出气口沿着水散热器向后延伸后向左折弯与发动机的进气口连接。在本发明中,将空气过滤装置设置在发动机舱外部,其不受发动机舱空间限制,可增大空气过滤装置容积,提高空气过滤的能力,降低空气滤清器维护频率。同时进气胶管布置路径避开高温部件,降低老化速度,提高其寿命。(The invention relates to an air filtering system of an excavator, which aims to solve the problems that an air inlet rubber pipe of the existing air filtering system of the excavator is easy to age and the filter element maintenance frequency is high; the air filtering device comprises an air filter and an oil bath type prefilter, wherein the air filter and the oil bath type prefilter are arranged outside an engine compartment and are positioned on the front side of the water radiator, and an air inlet rubber pipe extends backwards from an air outlet of the air filter along the water radiator and then is bent leftwards to be connected with an air inlet of the engine. In the invention, the air filtering device is arranged outside the engine compartment and is not limited by the space of the engine compartment, so that the volume of the air filtering device can be increased, the air filtering capacity is improved, and the maintenance frequency of the air filter is reduced. Meanwhile, the arrangement path of the air inlet rubber pipe avoids high-temperature components, the aging speed is reduced, and the service life of the air inlet rubber pipe is prolonged.)

1. An excavator air filtration system, the excavator comprises an engine, a silencer, a turbocharger and a water radiator which are arranged in an engine compartment, characterized in that the air filtration system comprises an air filtration device, the water radiator is arranged on the right side of the engine, the muffler is arranged on the left side of the engine, the turbocharger is arranged on the rear side of the engine, the air filtering device comprises an air filter of which an air outlet is connected with an air inlet of the engine through a first air inlet rubber pipe, an oil bath type prefilter which is connected with the air filter through a second air inlet rubber pipe, the air filter and the oil bath prefilter are arranged outside the engine compartment and on the front side of the water radiator, the first air inlet rubber pipe extends backwards from the air outlet of the air filter along the water radiator and then is bent leftwards to be connected with an air inlet of the engine.

2. The excavator air filtration system of claim 1 wherein the first air inlet hose extends from the air outlet of the air filter rearwardly over the top of the water radiator and is connected to the air inlet of the engine at a left bend.

3. The excavator air filtration system of claim 1 or 2 wherein the air filtration unit comprises two oil bath prefilters and two air filters in parallel, each air filter being connected to one oil bath prefilter.

4. The excavator air filtration system of claim 3 wherein an oil radiator is provided outside the engine compartment and in front of the water radiator, the air filtration device being fixedly mounted on top of the oil radiator by a mounting bracket.

5. The excavator air filtration system of claim 4 wherein said mounting bracket includes a frame secured to the top of said oil radiator and a pre-filter mounting bracket secured to the top of said frame, said air filters being fixedly mounted in said frame in tandem, said oil bath pre-filters being secured to said pre-filter mounting bracket, each oil bath pre-filter being connected to the air inlet of the air filter directly beneath it by a second air inlet hose.

6. The excavator air filtration system of claim 5 wherein said prefilter mount includes a base and two brackets secured to said base in tandem, said base being secured to the top of said tank mount, and two of said oil bath prefilters being secured to respective ones of said two brackets by clips.

7. The air filtration system of claim 6, wherein the base is provided with a through hole at the side of each bracket, and the second air inlet hose connected to the air outlet of the oil bath prefilter passes through the corresponding through hole downward through the base to the air inlet of the corresponding air filter in the tank frame.

8. The excavator air filtration system of claim 7 wherein the through hole is provided with an air inlet hose bracket for securing a second air inlet hose.

Technical Field

The present invention relates to excavator engine intake air filtration, and more particularly to an excavator air filtration system.

Background

On an excavator, air entering an engine needs to be filtered first, and solid impurities in the air are removed and then enter the engine. The existing engine intake filtration usually adopts two-stage filtration of a dry prefilter and an air filter, and outside air with dust and impurities enters the dry prefilter through grids; the air passes through the fixed blades of the dry-type prefilter, changes the flow direction, forms a rotating vortex and is directly discharged out of the dry-type prefilter, partial solid impurities in the air are removed by the dry-type prefilter, the air discharged from the dry-type prefilter enters the air filter below the dry-type prefilter, is filtered by the air filter and then enters the engine through the air inlet rubber tube.

In the prior art, both a dry prefilter and an air cleaner of an excavator are installed in an engine compartment, and an engine, a water radiator, a muffler, a turbocharger, the dry prefilter, the air cleaner, and the like are installed in the engine compartment of the excavator. As shown in figure 1, the engine is arranged in the middle of an engine compartment, a water radiator is arranged on the right side of the engine, a turbocharger and a silencer are arranged on the rear portion of the engine, an air filter is arranged on the left side of the engine, a dry type prefilter is arranged above the air filter, an outlet of the dry type prefilter is connected with the air filter through a pipeline, and an outlet of the air filter is connected with an air inlet of the engine through an air inlet rubber pipe. Due to the limited space within the engine compartment, the spacing between the components is often limited. The following problems therefore generally exist for air pre-filtering systems:

1. high-temperature and high-pressure waste gas generated by the work of the engine is discharged through the turbocharger and the silencer, the temperature of an engine compartment is very high due to the fact that the air filter and the air inlet rubber pipe are close to the turbocharger and the silencer and are located at a lower air inlet of the cooling fan, the temperature of the air inlet rubber pipe is very high, high-temperature aging is easy to occur, and connection failure is caused.

2. The engine compartment space is limited, can't hold the air cleaner of large capacity, and the air cleaner of small capacity blocks up easily, makes the maintenance frequency of filter core very high, increases and maintains the human cost.

3. The dry air pre-filter has poor dust filtering capability and is not suitable for the mine working condition with high dust, so that the daily maintenance frequency of the air filter is increased.

Disclosure of Invention

The invention aims to solve the technical problems that an air inlet rubber pipe of an existing air filtering system of an excavator is easy to age and filter element maintenance frequency is high, and provides the air filtering system of the excavator, which improves air filtering capacity, reduces daily maintenance frequency of an air filter and prolongs service life of the air inlet rubber pipe.

The technical scheme for realizing the purpose of the invention is as follows: there is provided an excavator air filtration system, the excavator comprising an engine mounted within an engine compartment, a muffler, a turbocharger, a water radiator, characterized in that the air filtration system comprises an air filtration device, the water radiator is arranged on the right side of the engine, the muffler is arranged on the left side of the engine, the turbocharger is arranged on the rear side of the engine, the air filtering device comprises an air filter of which an air outlet is connected with an air inlet of the engine through a first air inlet rubber pipe, an oil bath type prefilter which is connected with the air filter through a second air inlet rubber pipe, the air filter and the oil bath prefilter are arranged outside the engine compartment and on the front side of the water radiator, the first air inlet rubber pipe extends backwards from the air outlet of the air filter along the water radiator and then is bent leftwards to be connected with an air inlet of the engine. Further, the first air inlet rubber pipe extends backwards from the air outlet of the air filter at the top of the water radiator. In the invention, the air filtering device is arranged outside the engine compartment and in front of the water radiator, so that the arrangement of the air filtering device is not limited by the space of the engine compartment, the volume of the air filtering device can be increased or a plurality of air filters and oil bath type prefilters are arranged, the air filtering capacity is increased, and the maintenance frequency of the air filter is reduced. Meanwhile, the air filtering device is arranged at the position, so that the arrangement path of the first air inlet rubber pipe avoids high-temperature components of a turbocharger and a silencer, and meanwhile, the first air inlet rubber pipe is positioned at an upper air inlet of a water radiator fan, and accelerated aging caused by the fact that the first air inlet rubber pipe is in a high-temperature environment is avoided.

In the air filtering system of the excavator, the air filtering device comprises two oil bath type prefilters and two air filters connected in parallel, and each air filter is connected with one oil bath type prefilter. Two oil bath type prefilters and two air filters connected in parallel are adopted, so that the air filtering capacity of the air filtering device is improved, and the maintenance frequency of the air filters is reduced.

In the air filter system of the excavator, the oil radiator is arranged outside the engine compartment and in front of the water radiator, and the air filter device is fixedly mounted on the top of the oil radiator through the mounting bracket.

In the air filtering system of the excavator, the mounting bracket comprises a box frame fixed at the top of the oil radiator and a prefilter mounting frame fixed at the top of the box frame, the air filters are fixedly arranged in the box frame in a front-back mode, the oil bath prefilters are fixed on the prefilter mounting frame, and each oil bath prefilter is connected with an air inlet of the air filter below the oil bath prefilter through a second air inlet rubber tube.

In the air filtering system of the excavator, the prefilter installation frame comprises a base and two supports which are arranged and fixed on the base in a front-back mode, the base is fixed on the top of the box frame, and the two oil bath prefilters are correspondingly fixed on the two supports through clamps respectively.

In the air filtering system of the excavator, the base is provided with a through hole at the side of each bracket, and a second air inlet rubber tube connected with the air outlet of the oil bath type prefilter downwards penetrates through the base to the box frame through the corresponding through hole to be connected with the air inlet of the corresponding air filter.

In the air filtering system of the excavator, the air inlet rubber tube support used for fixing the second air inlet rubber tube is arranged at the through hole.

Compared with the prior art, the air filtering device is arranged outside the engine compartment and in front of the water radiator, so that the size of the air filtering device is not limited by the space of the engine compartment, the volume of the air filtering device is increased or a plurality of air filters and oil bath type prefilters are arranged to improve the air filtering capacity of the air filtering device, and meanwhile, the arrangement path of the first air inlet rubber pipe connected with the engine avoids high-temperature components, and the first air inlet rubber pipe is prevented from being in a high-temperature environment to cause accelerated aging.

Drawings

Fig. 1 is a schematic view of an air filter system arrangement of a conventional excavator.

Fig. 2 is a schematic layout of an excavator air filtration system of the present invention.

FIG. 3 is a schematic view of the construction of the air filtration unit of the excavator air filtration system of the present invention.

FIG. 4 is a schematic view of the construction of a prefilter mount in an excavator air filtration system of the present invention.

FIG. 5 is a schematic view of the base of the excavator air filtration system of the present invention.

FIG. 6 is a schematic view of an air inlet hose bracket in the air filtration system of the excavator according to the present invention.

Detailed Description

The following description of the embodiments refers to the accompanying drawings.

As shown in fig. 2, in the present embodiment, the excavator includes an engine 6, a muffler 5, a turbocharger 4, a water radiator 7, and the like, which are mounted in an engine compartment 10, wherein the water radiator 7 is disposed on the right side of the engine 6, the muffler 5 is disposed on the left side of the engine 6, and the turbocharger 4 is disposed on the rear side of the engine 6. The air filtering system comprises an air filtering device and an air inlet rubber hose. The air filtering device comprises an air filter 1 with an air outlet connected with an air inlet of an engine 6 through a first air inlet rubber hose 11, and an oil bath type prefilter 9 connected with the air filter 1 through a second air inlet rubber hose 12, wherein the air filter 1 and the oil bath type prefilter 9 are arranged outside an engine compartment 10 and positioned on the front side of a water radiator 7, and the first air inlet rubber hose 11 extends backwards from the air outlet of the air filter 1 along the water radiator 7 and then is bent leftwards to be connected with the air inlet of the engine 6. The first air inlet rubber hose 11 extends backwards above the water radiator 7 to avoid a hot air field of a fan of the water radiator as much as possible, and then the box is bent leftwards to be connected with an air inlet of an engine.

As shown in fig. 2 and 3, an oil radiator 8 is provided outside the engine compartment and in front of the water radiator 7, and the air filter device is fixedly mounted on the top of the oil radiator 8 by a mounting bracket. The air filtering device comprises two oil bath prefilters 9 and two air filters 1 connected in parallel, wherein each air filter 1 is connected with one oil bath prefilter through a second air inlet hose 12. The mounting bracket comprises a box frame 13 fixed at the top of the oil radiator 8 and a prefilter mounting frame fixed at the top of the box frame 13, the two air filters 1 are fixedly mounted in the box frame in a front-back arrangement mode, the two oil bath prefilters are fixed on the prefilter mounting frame, and each oil bath prefilter is connected with an air inlet of the air filter below the oil bath prefilter through a second air inlet rubber pipe 12.

As shown in fig. 4, the prefilter mount includes a base 14 and two brackets 15 arranged one behind the other and fixed to the base, the base 14 being fixed to the top of the box frame 13, and the two oil bath prefilters 9 being fixed to the two brackets 15 by clips, respectively.

As shown in fig. 5, the base 14 is provided with a through hole 141 at a side of each bracket, and the air intake hose bracket 16 is installed in the through hole 141. And a second air inlet rubber pipe 13 connected with the air outlet of the oil bath type prefilter 9 downwards penetrates through the base 14 to the box frame 13 through an air inlet rubber pipe bracket 16 in the corresponding through hole to be connected with the air inlet of the corresponding air filter 1.

As shown in fig. 6, the main body of the intake hose holder 16 is cylindrical, an attachment plate 161 is provided on the outer cylindrical surface of the main body, and the intake hose holder 16 is fixedly connected to the base 14 via the attachment plate 161.

The air filtering device is arranged outside the engine compartment and in front of the water radiator, so that the size of the air filtering device is not limited by the space of the engine compartment, the volume of the air filtering device can be increased or a plurality of air filters and oil bath type prefilters are arranged to improve the air filtering capacity of the air filtering device, and meanwhile, the arrangement path of the first air inlet rubber pipe connected with the engine avoids high-temperature components, and the first air inlet rubber pipe is prevented from being in a high-temperature environment to cause accelerated aging. In addition, the oil bath type prefilter is used, so that the efficiency of prefiltering air can be greatly improved.