Test fixture and test device for air filter assembly of engine

Abstract

The utility model relates to the technical field of engine air inlet particulate matter air filtration clamp test, in particular to a test clamp and a test device for an engine air filtration assembly, which comprises a support base, a bottom cylinder mounted on the support base, and an air inlet upper cover covering an opening at the upper end of the bottom cylinder, a filter element groove is formed in an opening in the upper end of the bottom cylinder and used for containing a to-be-tested filter element, so that the air inlet upper cover and the bottom cylinder are clamped on the upper side and the lower side of the to-be-tested filter element respectively, a sealing state is formed, and filtering testing is facilitated. In conclusion, the utility model provides a filter material testing scheme which is economical and efficient and is not limited by an engine assembly shell. According to the scheme, filter elements of various sizes are allowed to be tested, the research and development progress is accelerated, and the research and development cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of fixture testing for engine intake particulate air filters, and in particular to a test fixture and test device for an engine air filter assembly. Background Technology

[0002] In the research and development and production of engine filter materials, testing the filter materials to determine their filtration parameters and performance is crucial. However, current testing faces many challenges:

[0003] On the one hand, the experimental tests require the use of the corresponding housings of the engine assembly for testing. However, the shapes and specifications of housings of different engine assembly models vary, and preparing these housings requires a high investment. The high cost and time consumption are due to the significant differences in the shapes and sizes of housings of different engine assembly models, which require the preparation of a large number of housings of different specifications for testing, resulting in huge costs and time consumption.

[0004] On the other hand, during the new vehicle development phase, the engine assembly housing is often not yet finalized or in production, making it impossible to obtain in a timely manner. The lack of an engine assembly housing delays all related testing of the filter materials, severely hindering the development progress. Limited testing opportunities mean that in the early stages of engine development, before the assembly housing is finalized, testing of the filter materials cannot be conducted, leading to significant delays in the development process. Even for existing engine models, obtaining their housings may be difficult, further limiting the scope of testing.

[0005] To address the issues of the inability to obtain engine assembly housings from automobile manufacturers in a timely manner and the excessively high cost of preparing housings of different models, it is necessary to develop a solution that uses self-developed tooling fixtures to meet the pilot conditions for self-testing development. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0007] This utility model provides a test fixture for an engine air filter assembly, including a support base, a bottom cylinder mounted on the support base, and an air intake cover covering the upper opening of the bottom cylinder; a filter element groove is provided at the upper opening of the bottom cylinder to accommodate the filter element to be tested, so that the air intake cover and the bottom cylinder respectively clamp the upper and lower sides of the filter element to be tested and form a sealed state, which facilitates filtration testing.

[0008] As a further embodiment of this utility model: the filter element groove is further provided with an extended frame, the inner ring of the extended frame is fixed to the filter element to be tested, and its outer ring abuts against the inner wall of the bottom cylinder.

[0009] As a further embodiment of this utility model: a pressure cap is provided at one end of the air intake cover near the bottom cylinder, the pressure cap can cover the filter element groove and form a sealed connection with the filter element groove.

[0010] As a further embodiment of this utility model: the bottom cylinder is also provided with a fastening fastener, one end of which is fixed to the bottom cylinder, and the other end forms a free end, which is used to fasten the cover that is fitted into the groove of the filter element, so that it is firmly connected to the bottom cylinder.

[0011] As a further embodiment of this utility model: an air inlet pipe is provided at the end of the air inlet cover away from the bottom cylinder, and the air inlet pipe is connected to an external smoke generator, thereby allowing external smoke to be introduced for filtration testing.

[0012] As a further embodiment of this utility model: an air outlet pipe is provided at the end of the bottom cylinder away from the filter element groove, and the air outlet pipe is connected to an external detection sensor to detect the airflow passing through.

[0013] A testing device is also provided, including the test fixture of the engine air filter assembly described above, and further including a testing mechanism, a weighing mechanism and an ash supply mechanism. The air outlet of the ash supply mechanism is connected to the air inlet pipe of the air inlet cover, the air inlet of the testing mechanism is connected to the air outlet pipe of the bottom cylinder, and the support base is installed on the upper weighing end of the weighing mechanism, thereby weighing the entire test fixture.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By designing filter element grooves and adjustable extended frames, different sized filter elements can be adapted, ensuring a good seal during testing. This fixture not only reduces reliance on the engine assembly housing but also reduces cost and time investment, improving the flexibility and efficiency of research and development.

[0016] 2. The fixture design also takes into account the specific needs of filtration testing, including connections to the dust generator and detection sensors, ensuring accurate testing and data collection of filtration performance. This innovative design provides an effective solution for the development of engine filter materials and promotes the advancement of related technologies.

[0017] Therefore, this patent provides an economical and efficient filter material testing solution that is not limited by the engine assembly housing. This solution allows for testing of filter elements of various sizes, accelerating the development process and reducing development costs.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional structural diagram of the test fixture of this utility model;

[0021] Figure 2 This is a structural schematic diagram of the air intake cover and the bottom cylinder of this utility model in a separated state;

[0022] Figure 3 This is a schematic diagram of the bottom cylinder and filter element groove of this utility model;

[0023] Figure 4 This is a schematic diagram of the filter element groove and extended frame of this utility model.

[0024] The reference numerals and names in the figure are as follows:

[0025] 10 Support base; 20 Bottom cylinder; 21 Filter element groove; 22 Extended frame; 23 Air outlet pipe; 30 Air inlet cover; 31 Pressure cap; 32 Air inlet pipe; 40 Testing mechanism; 41 Filter element to be tested. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Please see Figures 1 to 4 In this embodiment of the present invention, a test fixture for an engine air filter assembly includes a support base 10, a bottom cylinder 20 mounted on the support base 10, and an air intake cover 30 covering the upper opening of the bottom cylinder 20. A filter element groove 21 is provided at the upper opening of the bottom cylinder 20 to accommodate the filter element 41 to be tested, so that the air intake cover 30 and the bottom cylinder 20 are respectively clamped on the upper and lower sides of the filter element 41 to be tested and form a sealed state, which facilitates the filtration test.

[0028] Specifically, in actual production scenarios, when developing and producing engine filter materials, it is necessary to test the filter materials to determine their filtration parameters and performance. However, during experimental testing, a corresponding engine assembly housing is required for the testing process. Different engine assembly housings have different shapes and specifications, requiring significant preparation costs. Furthermore, during the development of new vehicles, the engine assembly housing is often not yet finalized or in production, making it difficult to obtain in a timely manner. This shortage of engine assembly housings leads to delays in all tests related to the filter materials, severely slowing down the development process.

[0029] Secondly, to address the issues of timely access to engine assembly housings from automakers and the high costs associated with preparing different housing models, we developed our own tooling and fixtures to achieve the necessary conditions for self-testing and development. Using our self-developed housing (cylinder block), as long as the customer provides the required dimensions for the corresponding filter material, we can perform installation tests on the actual filtration effect of the filter element, thus improving development speed and saving development costs.

[0030] like Figures 2 to 4 As shown, preferably, the filter element groove 21 is further provided with an extended frame 22, the inner ring of the extended frame 22 is fixed to the filter element 41 to be tested, and its outer ring abuts against the inner side wall of the bottom cylinder 20.

[0031] Specifically, to accommodate filter elements 41 of different sizes, an airtight extended frame 22 can be installed inside the filter element groove 21. The extended frame 22 is made of a relatively easier-to-process plastic material, and the inner ring of the extended frame 22 forms a sealed and fixed connection with the filter element 41. At the same time, the outer ring of the extended frame 22 forms a sealed connection with the inner wall of the bottom cylinder 20.

[0032] like Figure 1 and Figure 2 As shown, preferably, the air intake cover 30 has a pressure cap 31 at one end near the bottom cylinder 20. The pressure cap 31 can cover the filter element groove 21 and form a sealed connection with the filter element groove 21.

[0033] Specifically, to better align with the intake cover 30, a pressure cap 31 can be installed at one end of the intake cover 30 connecting to the bottom cylinder 20. The pressure cap 31 can both press against the extended frame 22 to form a sealed connection and also be pressed into the sealing groove a certain distance to form a sealed connection with the groove. A sealing plate can also be attached to the side of the pressure cap 31 that contacts the extended frame 22 to further improve the seal between the pressure cap 31 and the extended frame 22. Similarly, a sealing ring can be added to the part of the pressure cap 31 facing the filter element groove 21 to further improve the seal between the pressure cap 31 and the filter element groove 21.

[0034] Secondly, the bottom cylinder 20 is also provided with a fastening fastener. One end of the fastening fastener is fixed to the bottom cylinder 20, and the other end forms a free end, which is used to fasten the cover 31 that covers the filter element groove 21, so that it is firmly connected to the bottom cylinder 20.

[0035] like Figure 1 As shown, preferably, the air inlet cover 30 is provided with an air inlet pipe 32 at the end away from the bottom cylinder 20. The air inlet pipe 32 is connected to an external smoke generator, thereby allowing external smoke to be introduced for filtration testing.

[0036] Specifically, for filtration testing, it is preferable to use an existing smoke generator to produce smoke or dust with preset parameters, which is then passed through the filter element 41 under test from top to bottom, filtering the dust onto the filter element 41. Finally, the corresponding filtration performance is calculated by weighing. For example, 270-mesh quartz sand is used as the experimental ash, with the drying temperature set to 105℃ and the drying time set to 90 minutes.

[0037] like Figure 1 and Figure 3 As shown, preferably, the bottom cylinder 20 is provided with an air outlet pipe 23 at the end away from the filter element groove 21. The air outlet pipe 23 is connected to an external detection sensor to detect the airflow.

[0038] Specifically, in order to conduct filtration tests, it is preferable to use existing detection sensors to detect the air passing through the filter element 41 under test.

[0039] This utility model also provides a testing device, including the above-mentioned testing fixture, and further including a testing mechanism 40, a weighing mechanism and an ash supply mechanism. The air outlet of the ash supply mechanism is connected to the air inlet pipe 32 of the air inlet cover 30, the air inlet of the testing mechanism 40 is connected to the air outlet pipe 23 of the bottom cylinder 20, and the support base 10 is installed on the upper weighing end of the weighing mechanism, thereby weighing the entire testing fixture.

[0040] Specifically, to test and evaluate the filtration parameters and performance of the filter element 41 under test, preferably, a weighing mechanism is also provided at the lower part of the support base 10 to weigh the weight of the dust intercepted by the filter element 41 after filtration. Simultaneously, a testing mechanism 40 is installed at one end of the air outlet pipe 23 to test parameters such as airflow and gas pressure during the air filtration process using existing technology, thereby meeting the production requirements of the filter element 41 under test. Furthermore, to simulate the actual situation where an engine air filter needs to filter dust from the air, a corresponding dust supply mechanism can also be provided, using the generated dust for relevant testing.

[0041] The specific operation procedure of the testing device in this utility model is as follows:

[0042] 1. Before the experiment, determine the amount of test ash to be used and dry the ash. The drying temperature and time should refer to the standard QC / T32-2006. For example, if 270 mesh quartz sand is used, the specific drying temperature and time are 105℃ and 90min.

[0043] 2. Turn on the power, turn on the main unit switch and the computer switch, then connect the filter to the absolute filter media device, run it for 10 minutes according to the test air volume conditions to make it in the same environment, and let the equipment run for 10-20 minutes.

[0044] 3. Before the experiment, weigh the absolute filter material. The difference between the two weighing results should not exceed 0.05% of the ash amount. At the same time, adjust the ash concentration (according to the experimental conditions). When adjusting the ash concentration, weigh it multiple times to determine the accuracy of the concentration. Record the weight of the absolute filter material before the experiment and the total weight of the powder feeding device before ash feeding.

[0045] 4. Begin the experiment, and conduct experiments under multiple conditions such as initial air resistance, initial efficiency, and total life efficiency;

[0046] 5. After the experiment is completed, the experimental data can be retrieved from the database;

[0047] 6. After the test is completed, check each step carefully, clean the remaining ash in the powder feeding device and put it back into the dryer, and turn off the power and air supply valves of each device in sequence.

[0048] To more clearly describe the technical solution of this utility model, several embodiments are provided below, covering different scenarios and parameters:

[0049] Example 1: Standard Filter Cartridge Test

[0050] This embodiment uses a rectangular filter element with a certain thickness, a long side length of 100mm, and a short side length of 50mm for testing. The support base 10, the bottom cylinder 20, and the air inlet cover 30 are all made of metal materials, such as aluminum alloy or steel. The extended frame 22 is customized according to the filter element size and is made of ABS plastic. The inner ring fits tightly with the filter element, and the outer ring forms a seal with the inner wall of the bottom cylinder 20. A sealing plate made of silicone material is provided between the pressure cap 31 of the air inlet cover 30 and the filter element groove 21, and a sealing ring is used to ensure airtightness. Using a patented test fixture, the filter element is installed in the filter element groove 21 of the bottom cylinder 20, ensuring that the extended frame 22 is sealed to the filter element and that the pressure cap 31 of the air inlet cover 30 is well sealed to the filter element groove 21.

[0051] During the test, 270-mesh quartz sand was used as the test ash, and dried according to QC / T32-2006 standard (105℃, 90 minutes). A dust generator produced a preset concentration of quartz sand dust, which entered the test fixture through inlet pipe 32, passed through the filter element, and then entered the detection sensor through outlet pipe 23 to measure its filtration efficiency and pressure drop. The test data were recorded and analyzed by a connected computer system.

[0052] Example 2: Testing of Non-Standard Size Filter Cartridges

[0053] This embodiment tests a rectangular filter element with dimensions of 80mm x 120mm. The bottom cylinder 20 and the air inlet cover 30 are both designed and manufactured from metal. The extended frame 22 is made of silicone rubber and is molded to precisely fit the shape of the filter element. The corresponding seals of the bottom cylinder 20 and the air inlet cover 30 of the test fixture are adjusted accordingly to ensure compatibility with the rectangular filter element. A custom-made extended frame 22 is installed within the filter element groove 21 to ensure a seal with the bottom cylinder 20, thus guaranteeing a tight seal with the filter element groove 21. Other test parameters are the same as in Embodiment 1. This embodiment demonstrates the adaptability of this test fixture to filter elements of different shapes and sizes.

[0054] Example 3: High-efficiency filter element test

[0055] This embodiment tests a more efficient filter cartridge with higher requirements for filtering fine particles. In the test, finer-particle-size test ash, such as 400-mesh quartz sand, was used, and the parameters of the dust generator were adjusted to produce even finer dust particles. To improve test accuracy, a more sensitive detection sensor was used. Other parameters remained consistent with Embodiment 1. This embodiment emphasizes the applicability of this test fixture under different filtration accuracy requirements.

[0056] Example 4: Material Comparison Test

[0057] This embodiment compares the filtration performance of filter cartridges made of two different materials. Using the same test fixture, both filter cartridges were tested, with other test parameters kept consistent. By comparing parameters such as filtration efficiency and pressure drop of the two filter cartridges, the advantages and disadvantages of different materials can be evaluated, aiding in material selection.

[0058] The above four embodiments demonstrate the flexibility and applicability of this patented technical solution, enabling it to adapt to filter cartridge testing with different sizes, shapes, materials, and filtration efficiency requirements. It allows for filter cartridge performance testing under various conditions, thus providing solid technical support for the research and development of filter materials.

[0059] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A test fixture for an engine air filter assembly, characterized in that, It includes a support base (10), a bottom cylinder (20) installed on the support base (10), and an air inlet cover (30) covering the upper opening of the bottom cylinder (20). A filter element groove (21) is provided at the upper opening of the bottom cylinder (20) to accommodate the filter element (41) to be tested, so that the air inlet cover (30) and the bottom cylinder (20) are respectively clamped on the upper and lower sides of the filter element (41) to be tested and form a sealed state, which facilitates the filtration test.

2. The test fixture for an engine air filter assembly according to claim 1, characterized in that, The filter element groove (21) is also provided with an extended frame (22), the inner ring of which is fixed to the filter element (41) to be tested, and its outer ring abuts against the inner wall of the bottom cylinder (20).

3. The test fixture for an engine air filter assembly according to claim 1, characterized in that, The air intake cover (30) has a pressure cap (31) at one end near the bottom cylinder (20). The pressure cap (31) can cover the filter element groove (21) and form a sealed connection with the filter element groove (21).

4. A test fixture for an engine air filter assembly according to claim 3, characterized in that, The bottom cylinder (20) is also provided with a fastening fastener. One end of the fastening fastener is fixed to the bottom cylinder (20), and the other end forms a free end, which is used to fasten the cover (31) that is covered in the filter element groove (21), so that it is firmly connected to the bottom cylinder (20).

5. A test fixture for an engine air filter assembly according to claim 1, characterized in that, The air inlet cover (30) is provided with an air inlet pipe (32) at one end away from the bottom cylinder (20). The air inlet pipe (32) is connected to an external smoke generator so as to access external smoke and dust for filtration testing.

6. A test fixture for an engine air filter assembly according to claim 1, characterized in that, The bottom cylinder (20) is provided with an air outlet pipe (23) at one end away from the filter element groove (21). The air outlet pipe (23) is connected to an external detection sensor to detect the airflow.

7. A testing apparatus, characterized in that, The test fixture for an engine air filter assembly according to any one of claims 1-6 further includes a test mechanism (40), a weighing mechanism and an ash supply mechanism. The outlet end of the ash supply mechanism is connected to the air inlet pipe (32) of the air inlet cover (30), the air inlet end of the test mechanism (40) is connected to the air outlet pipe (23) of the bottom cylinder (20), and the support base (10) is installed on the upper weighing end of the weighing mechanism, thereby weighing the entire test fixture.

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