Having a good air filter has a significant impact on the performance and longevity of an automobile engine. Doing a good job in the daily maintenance of the air filter can not only prevent the engine from experiencing abnormal wear, but it can also significantly extend the life of the engine and the air filter. Life expectancy of a service. A brief introduction to the classification and structure of air filters, as well as the cleaning frequency and cleaning methods, as well as the proper replacement and installation methods of dry air filters for small excavators, is provided, and potential maintenance misunderstandings and misunderstandings are analyzed as a result. As well as presenting the most appropriate and effective maintenance methods. The engine's air intake system is incomplete without a properly functioning air filter mini excavator supplier. As a result, it is capable of separating dust that enters engine air to the greatest extent possible, which helps to prevent premature wear of engine cylinders, pistons, and piston rings. A malfunctioning air filter will result in an insufficient amount of air being drawn into the engine, insufficient combustion, a reduction in power, black smoke, and even scrapping. This will not only have an impact on the engine's power and economy, but it will also have an impact on the environment. Emissions from automobile engines pollute the environment. As a result, proper maintenance of the air filter is extremely important in order to ensure the stable and reliable operation of the engine, as well as the stable and reliable operation of the entire machine.
1 Introduction to the air filter in brief
Currently, air filters commonly used in diesel engines can be classified into two types: dry and wet. The difference between the two is whether the air is oiled or not. Wet air filters are currently used in agricultural machinery and small and medium-sized mining machinery due to the limitations of their own application; however, dry air filters are gradually replacing wet air filters in construction machinery such as small excavators, particularly in China. The majority of small excavator manufacturers primarily employ rotating dust-collecting dry dual-core air filters in their machines. The purpose of this article is to explain the most common maintenance misunderstandings and the proper maintenance methods for rotating dust-collecting dry dual-core air filters for small excavators (hereinafter referred to as dry air filters) in detail.
1) The dry air filter's chemical composition
The dry air filter is primarily composed of a shell, a safety filter element (also known as an inner filter element), a main filter element (also known as an outer filter element), an end cover, and a dust exhaust valve. The safety filter element is also known as an inner filter element. It is common to use dry air filters because of their numerous advantages, including ease of installation, high filtration efficiency, large ash holding capacity, low environmental pollution, and ease of maintenance.
2) The dry air filter's operation is explained in detail here.
Pre-filter device (located between the housing and the main filter element) for the dry air filter, which can cause air entering the air filter to generate a swirling flow, which, due to the action of centrifugal force, will separate heavier dust particles from the intake air and deposit them in the dust valve. The high-performance dry air filter has a pre-filtering capacity of more than 85% and only allows less than 15% of the dust to pass through to the second-stage filter area (main filter element). Under normal conditions hydraulic breaker, the filtration efficiency of the main filter element can reach levels comparable to those observed in the industry. More than 99.9% of the time. In addition to the main filter element, there is a first-level safety filter element contained within it. Under normal circumstances, the pre-filter and the main filter element of the dry air filter are responsible for the majority of the dust removal from the air. Only when the main filter element is improperly maintained, poorly sealed, or damaged does the safety filter element fail to function. The engine can be protected by using a safety filter. When compared to the main filter element, the safety filter element has a higher permeability, a lower flow resistance, and a lower filtration efficiency than the main filter element. It will have no effect on the overall filtration efficiency and will only provide a protective layer of protection. As a result, it is not permitted to start the engine when only the safety filter element is present.
2 Common dry air filter maintenance misunderstandings, as well as proper dry air filter maintenance techniques
It is common for people to overlook the importance of daily maintenance of the dry air filter, which has a significant impact on the engine's life, power, and economy. Besides affecting the filtration efficiency and life of the air filter, this will also allow dust to enter the engine, causing wear and tear on the engine's internal components. The following are some of the most common misunderstandings and correct maintenance methods when it comes to the daily maintenance of dry air filters.
1) When should the dry air filter be cleaned?
It is common for dry air filter users to believe that cleaning the air filter on a regular basis will increase the service life of the filter element, but in reality, this is not the case. This is a common maintenance misconception that most users have. In addition, because dry air filters have an initial filtration efficiency of around 99.5%, the filtration efficiency of dry air filters will continue to improve over time as more and more dust adheres to the filter paper, eventually reaching more than 99.99%.
If the dry air filter is cleaned too frequently, the filtering capacity of the filter element will not be fully utilized, which will not only increase the amount of dust that enters the engine, but it will also increase the likelihood of filter element damage as the number of cleanings increases as well. If the filter element becomes damaged and is not discovered in time, it will aggravate the wear on the engine and shorten the engine's life significantly. As a result, after the differential pressure alarm has sounded, the dry air filter best mini excavator should be thoroughly cleaned. This not only reduces the workload, but it also improves the engine's protection and allows for cost savings. In addition, based on calculations and experimental verification, the dust holding capacity of the main filter element will be reduced by 20%-40% after each cleaning session. Therefore, as the frequency of cleaning increases, the dust holding capacity of the main filter element of the dry air filter will gradually diminish. When the main filter element has been cleaned up to six times, the dust-holding capacity of the filter element has been reduced to almost nothing. At this point, a new main filter element should be installed as soon as possible; otherwise, the resistance of the intake system will increase, reducing the efficiency and fuel economy of the engine.
2) Methods for cleaning the primary filter element
The main filter element of a dry air filter is frequently cleaned by tapping, according to many users. Despite the fact that this is a simple and convenient method, it is not only easy to cause damage to the main filter element, but it also allows a large amount of dust to enter the inner side of the main filter element, allowing dust into the engine. The proper cleaning procedure is as follows:
(1) First, carefully remove the main filter element from the camera. Then, using a soft brush, brush away any dust that has accumulated on its surface in the direction of the crease. Finally, gently tap the end surface of the main filter element to make any remaining dust fall off. When performing the aforementioned operations, use a clean cloth or rubber plug to block both ends of the main filter element in order to prevent splashed dust from falling into the inner surface of the main filter element after it has been cleaned. You can also use compressed air or an air pump to blow air from the inside of the main filter element to blow away dust that has adhered to the outer surface of the main filter element (the air pressure should not exceed 0.2-0.3 MPa to avoid damage to the filter paper). When cleaning the main filter element, do not use any liquids. During the cleaning process, avoid allowing the liquid to adhere to the main filter element; otherwise, the filter element will become clogged, increasing the resistance to air intake.
(2) Inspect the main filter element to see if it has been damaged, if the upper and lower end faces have not been flattened, if the rubber sealing ring has been damaged, or if there is dust inside the main filter elementIf there are any of these issues, the main filter element should be replaced as soon as possible, even if the replacement time has not yet expired.
(3) Examine the safety filter element with a bright flashlight to see if it has been damaged. At this time, do not remove the safety filter element from the system for inspection. In the event that the safety filter element becomes damaged, it should be replaced as soon as possible.
3) Thorough cleaning of the shell and dust valve
The ash holding capacity of the dry air filter itself is comprised of three components: the ash holding capacity of the main filter element, the ash holding capacity of the shell, and the amount of dust discharged through the dust exhaust valve (if applicable). The overall dust holding capacity of the dry air filter will be significantly reduced if the housing of the air filter is not cleaned at the same time as the filter element is cleaned or if the dust exhaust valve does not function properly. If only the main filter element is cleaned, and the air filter housing is not cleaned, or if the dust exhaust valve does not discharge dust, the service life of this series of air filters will be significantly reduced. When cleaning hydraulic breaker for mini excavatorthe air filter housing, be sure to thoroughly clean the inner wall of the air filter housing with a clean cloth, and be sure to check that the dust exhaust valve is functioning properly. If the dust valve is unable to discharge dust normally, there are two main possibilities: first, on rainy days or in an environment with extremely high air humidity, the dust separated by the air filter becomes damp and sticks to the port of the dust valve, causing the dust valve to malfunction. Second, on hot days or in an environment with extremely high air humidity, the dust separated by the air filter becomes dry and sticks to the port of the dust valve, causing the dust valve to malfunction. It cannot be eliminated smoothly; second, when the end cover of the air filter is installed, the dust exhaust valve is not vertically downward, resulting in the separated dust being unable to be eliminated. When cleaning the shell and main filter element of the air cleaner, make sure that the shell and dust exhaust valve are also cleaned in order to ensure smooth dust exhaust; when installing the air filter end cover, make sure that the dust exhaust valve is facing downwards or deflected left and right to ensure that dust exhaust is smooth. To ensure that the separated dust can be removed normally, the angle should not be greater than 15°.