A filter testing system and a filter testing method

Abstract

The present invention provides a filter testing system and a testing method, and relates to the technical field of filter performance testing. The filter testing system includes a testing circuit, and the testing circuit includes a testing oil tank, a first pump, a filter to be tested, a plurality of data analysis devices, and an environmental simulation device. The testing oil tank, the first pump, and the filter to be tested are sequentially connected to form a circulation circuit, wherein the filter to be tested is arranged in the environmental simulation device, and the plurality of data analysis devices are respectively arranged in parallel with the filter to be tested. The filter testing system provided by the present invention simulates the actual working condition of the filter to be tested by the environmental simulation device, and then the plurality of data analysis devices respectively perform real-time detection on the plurality of items of the filter to be tested, so as to obtain real and effective test data, thereby meeting the needs in the field of engineering machinery.

Description

Technical Field

[0001] The present invention relates to the technical field of filter performance testing, and in particular to a filter testing system and a testing method. Background Art

[0002] Filter testing technology is mainly used in the early and later stages of product development, as well as in quality and production control. Vehicles in this field are in good working condition and are basically under standard ideal conditions for research and testing.

[0003] As filters are used more and more widely in the field of engineering machinery and the working conditions are more demanding, the performance requirements for the filters themselves are also getting higher and higher.

[0004] However, the current test system can only test one project separately, and the same test system cannot have multiple test functions. Therefore, the existing test technology is too simple for filters in the field of engineering machinery, and it is impossible to obtain real and effective test data. Summary of the invention

[0005] In order to overcome the deficiencies in the prior art, the present application provides a filter testing system and a testing method to solve the problem that the existing filter testing technology cannot meet the needs of the engineering machinery field.

[0006] To achieve the above-mentioned purpose, the present application provides a filter testing system, comprising a test circuit, wherein the test circuit comprises a test oil tank, a first pump, a filter to be tested, a plurality of data analysis devices and an environmental simulation device;

[0007] The test oil tank, the first pump and the filter to be tested are sequentially connected to form a circulation loop, wherein:

[0008] The filter to be tested is arranged in the environmental simulation device;

[0009] A plurality of the data analysis devices are respectively arranged in parallel with the filters to be tested.

[0010] In a possible implementation, the plurality of data analysis devices include at least two of a differential pressure meter, a foreign particle analyzer, or a water content analyzer.

[0011] In a possible implementation, the environmental simulation device includes a three-integrated environmental test box, and the filter to be tested is arranged in the three-integrated environmental test box.

[0012] In a possible implementation, the test circuit further includes a first three-way valve, which is disposed between the first pump and the filter to be tested, and an outlet end of the first three-way valve is connected to the test oil tank via a first branch pipeline.

[0013] In a possible implementation manner, the test circuit further includes a second three-way valve, and the second three-way valve is arranged on a side of the filter to be tested away from the first pump;

[0014] One outlet end of the two-way and three-way valve is sequentially connected to an absolute filter, a one-way valve and the test oil tank through pipelines;

[0015] The other outlet end of the second three-way valve is connected to the pipeline between the one-way valve and the test oil tank through a pipeline.

[0016] In a possible implementation manner, the test loop further includes a first flow meter, wherein the first flow meter is placed between the filter to be tested and the test oil tank, and the first flow meter is close to the test oil tank.

[0017] In a possible implementation manner, the filter testing system further includes a dirt injection device and a water injection device, and the dirt injection device and the water injection device are respectively connected to the test oil tank.

[0018] In a possible implementation, the sewage injection equipment includes a sewage injection tank, a second pump and a second flow meter;

[0019] The dirty oil tank, the second pump, the second flow meter and the test oil tank are connected in sequence.

[0020] In a possible implementation manner, a third three-way valve is provided between the second pump and the second flow meter, and an outlet end of the third three-way valve is connected to the dirty oil tank through a fourth branch pipeline.

[0021] In a possible implementation, the water injection equipment includes a water injection tank, a third pump, a third flow meter, and a water particle size device;

[0022] The water injection tank, the third pump, the third flow meter, the water particle size device and the test oil tank are connected in sequence;

[0023] A fourth three-way valve is provided between the third pump and the third flow meter, and an outlet end of the fourth three-way valve is connected to the water injection tank through a fifth branch pipeline.

[0024] On the other hand, the present application also provides a filter testing method, using the above-mentioned filter testing system; the filter testing method comprises:

[0025] Filling the test medium into the test oil tank, and setting the simulated working conditions through the environmental simulation device;

[0026] The first pump is started, and the plurality of data analysis devices respectively detect the test medium in real time;

[0027] Read each test data detected by the data analysis device.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present application provides a filter testing system and testing method, the filter testing system includes a test loop, the test loop includes a test oil tank, a first pump, a filter to be tested, multiple data analysis devices and an environmental simulation device; the test oil tank, the first pump and the filter to be tested are sequentially connected to form a circulation loop, wherein: the filter to be tested is arranged in the environmental simulation device; multiple data analysis devices are respectively arranged in parallel with the filter to be tested. The filter testing system provided by the present application simulates the real working condition of the filter to be tested by the environmental simulation device, and then multiple data analysis devices respectively perform real-time detection on multiple items of the filter to be tested, so as to obtain real and effective test data, thereby meeting the needs in the field of engineering machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A modular schematic diagram of a filter testing system provided by an embodiment of the present application is shown;

[0032] Figure 2 A schematic diagram of the structure of a filter testing system provided in an embodiment of the present application is shown;

[0033] Figure 3 A flow chart of a filter testing method in a filter testing system provided in an embodiment of the present application is shown;

[0034] Figure 4 A flow chart showing another filter testing method in the filter testing system provided in an embodiment of the present application is shown;

[0035] Figure 5 A modular schematic diagram of another filter testing system provided by an embodiment of the present application is shown;

[0036] Figure 6 A schematic diagram of the structure of another filter testing system provided in an embodiment of the present application is shown;

[0037] Figure 7A schematic diagram of the structures of a dirt injection device and a water injection device in a filter testing system provided in an embodiment of the present application is shown.

[0038] Description of main component symbols:

[0039] 100-test loop; 100a-main pipeline; 100b-first branch pipeline; 100c-second branch pipeline; 100d-third branch pipeline; 110-test oil tank; 120-first pump; 130-filter to be tested; 140-environmental simulation device; 141-three-integrated environmental test box; 150-data analysis device; 151-water content analyzer; 1510-third sampling tube; 152-differential pressure gauge; 1520-first sampling tube; 153-impurity particle analyzer; 1530-second sampling tube; 160-first flowmeter; 170-first three-way valve; 180-second three-way valve; 181-absolute filter; 182-check valve;

[0040] 200-waste injection equipment; 200a-waste injection pipe; 200b-fourth branch pipeline; 210-waste injection tank; 211-stirring mechanism; 220-second pump; 230-third three-way valve; 240-second flow meter;

[0041] 300 - water injection equipment; 300a - water injection pipe; 300b - fifth branch pipeline; 310 - water injection tank; 320 - third pump; 330 - fourth three-way valve; 340 - third flow meter; 350 - water particle size device. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] Embodiment 1

[0048] See also Figure 1 This embodiment provides a filter testing system for testing filter performance, which can provide real and effective test data for filter testing applied in the field of engineering machinery.

[0049] Please refer to Figure 1 and Figure 2 The filter testing system provided in this embodiment includes a test loop 100, which includes a test oil tank 110, a first pump 120, a filter to be tested 130, multiple data analysis devices 150 and an environmental simulation device 140, wherein the test oil tank 110, the first pump 120 and the filter to be tested 130 are connected in sequence to form a circulation loop.

[0050] It can be understood that the test oil tank 110, the first pump 120 and the filter to be tested 130 are all connected in sequence through the main line 100a, and the test oil tank 110 is used to store the test medium. The first pump 120 provides power for the transportation of the test medium in the main line 100a, so that the test medium flows out of the test oil tank 110 along the main line 100a, passes through the first pump 120 and the filter to be tested 130 in sequence, and then returns to the oil tank.

[0051] Furthermore, in order to monitor the flow of the test medium in the main line 100a in real time, the test loop 100 also includes a first flow meter 160. In the present embodiment, the first flow meter 160 is arranged on the main line 100a between the filter 130 to be tested and the test oil tank 110, and the first flow meter 160 is close to the return oil side of the test oil tank 110. The first flow meter 160 is used to obtain the flow of the test medium in the main line 100a in real time, and then control the output frequency of the first pump 120 through signal feedback to ensure that the flow in the main line 100a is uniform and stable, thereby improving the accuracy of the test.

[0052] The filter to be tested 130 is disposed in an environmental simulation device 140. The filter to be tested 130 is used to filter the test medium in the main pipeline 100a. The environmental simulation device 140 can set the temperature, humidity and vibration frequency in the simulated environment to provide the filter to be tested 130 with an environment that simulates real working conditions, that is, simulated working conditions.

[0053] It can be understood that the environmental simulation device 140 provides simulated working conditions for the filter to be tested 130 to ensure that the filter to be tested 130 can be tested under a relatively real working condition, thereby making the data detected by multiple data analysis devices 150 on the filter to be tested 130 more real and effective, and more valuable for reference.

[0054] Furthermore, in this embodiment, the environmental simulation device 140 includes a three-integrated environmental test box 141, and the filter to be tested 130 is arranged in the three-integrated environmental test box 141. The three-integrated environmental test box 141 can provide temperature, humidity and vibration for the filter to be tested, so as to simulate the actual working condition of the filter to be tested 130 and provide the authenticity and validity of the test data.

[0055] Multiple data analysis devices 150 are respectively arranged in parallel with the filter to be tested 130. In other words, multiple data testing devices are respectively connected to the main pipeline 100a at the inlet and outlet ends of the filter to be tested through sampling pipelines, so as to perform real-time detection on the content of impurities in the test medium after filtration by the filter to be tested 130, and then the filtering performance of the filter to be tested 130 can be obtained by analyzing the obtained test data.

[0056] Furthermore, the test medium includes oil, such as fuel oil. It is understandable that the oil contains impurities, which may be solid impurities, liquid impurities, or a combination of solid impurities and liquid impurities. In other words, the test medium is a mixed solution of oil and solid impurities, a mixed solution of oil and liquid impurities, or a mixed solution of oil and solid impurities and liquid impurities.

[0057] Among them, the multiple data analysis devices 150 can respectively obtain the content of liquid impurities and solid impurities in the test medium. It can be understood that after the test medium is filtered by the filter to be tested 130, as the number of test cycles increases, the content of impurities in the test medium will decrease. Within the preset time or preset pressure difference, when the data analysis device 150 detects that the content data of a certain impurity can reach the threshold, it is judged that the performance index of the filter to be tested is qualified.

[0058] In some specific embodiments, the liquid impurities may be water, and the solid impurities may be fine solid particles. The corresponding multiple data analysis devices 150 can respectively obtain the water content and the solid particle content in the test medium.

[0059] Further, the plurality of data analysis devices 150 include a combination of at least two of a differential pressure meter 152 , a foreign particle analyzer 153 , or a water content analyzer 151 .

[0060] In this embodiment, the plurality of data analysis devices 150 include three types of equipment: a differential pressure meter 152 , a foreign particle analyzer 153 , and a water content analyzer 151 .

[0061] The differential pressure gauge 152 is connected to the main pipe 100a at both ends of the inlet and outlet of the filter to be tested 130 through the first sampling tube 1520 to detect the pressure difference at both ends of the inlet and outlet of the filter to be tested 130. By detecting the pressure difference at both ends of the inlet and outlet of the filter to be tested 130, it is further determined whether the filter to be tested 130 is clogged. It can be understood that when the pressure difference at both ends of the inlet and outlet of the filter to be tested 130 is relatively large, it is determined that the filter to be tested 130 is clogged. At this time, a new filter to be tested 130 should be replaced in time before testing. The design of the differential pressure gauge 152 realizes early warning protection for the filter test system.

[0062] The impurity particle analyzer 153 is connected to the main pipe 100a at both ends of the inlet and outlet of the filter to be tested 130 through the second sampling tube 1530. The impurity particle analyzer 153 is used to detect and analyze the solid particles in the test medium to determine the performance of the filter to be tested 130 in filtering fixed impurities.

[0063] The water content analyzer 151 is connected to the main pipe 100a at both ends of the inlet and outlet of the filter to be tested 130 through the third sampling tube 1510. The water content analyzer 151 is used to detect and analyze the moisture in the test medium to determine the oil-water separation performance of the filter to be tested 130.

[0064] Please refer to Figure 2 and Figure 3 Here, this embodiment also provides a filter testing method, which applies the filter testing method provided above in this embodiment.

[0065] The filter testing method provided in this embodiment includes:

[0066] S10: The test medium is loaded into the test oil tank 110 , and the simulated working conditions are set by the environmental simulation device 140 .

[0067] Specifically, solid impurities, water and oil are first mixed in a certain proportion to obtain a test medium, and the test medium is loaded into the test oil tank 110. The temperature, humidity and vibration of the simulated working conditions are set by the three-comprehensive environment test box 141 in the environment simulation device 140.

[0068] The temperature setting range of the three-comprehensive environment test box 141 is -60°C to 200°C, the humidity setting range is 0 to 100%, and the humidity setting range does not include the point values ​​at both ends. The vibration setting is set according to the actual working conditions to be simulated.

[0069] S20: The first pump 120 is started to start the test, and the plurality of data analysis devices 150 respectively detect the test medium in real time.

[0070] Specifically, the flow rate of the test medium in the main line 100a is first monitored by the first flow meter 160. The flow rate adjustment range of the test medium in the main line 100a is 0 to 300 L / min. The differential pressure gauge 152 in the multiple data analysis devices 150 detects the pressure difference between the inlet and outlet of the filter to be tested 130. When the pressure difference between the inlet and outlet of the filter to be tested 130 is relatively large, it is determined that the filter to be tested 130 is blocked. At this time, a new filter to be tested 130 should be replaced in time. The impurity particle analyzer 153 is used to detect and analyze the solid particles in the test medium to determine the performance of the filter to be tested 130 in filtering fixed impurities. The water content analyzer 151 detects and analyzes the water content in the test medium in the main line 100a, completes the oil-water analysis performance data analysis, and is used to determine the oil-water separation performance of the filter to be tested 130.

[0071] S30 : Reading the test data of each data analysis device 150 .

[0072] Specifically, the test data of each data analysis device 150 can be read manually or automatically through the control system. When the test time reaches the preset duration or the preset pressure difference value, the test is stopped, wherein the preset duration of the test can be 0 to 500 hours or longer, and it is understood that 0 hours is not included. The specific test duration is adjusted according to different models of the filter 130 to be tested. The preset pressure difference value of the test is 0 to 2MPa, and it is understood that 0MPa is not included.

[0073] The filter testing system provided in this embodiment simulates the actual working condition of the filter to be tested 130 through the environmental simulation device 140, and then multiple data analysis devices 150 respectively perform real-time detection on multiple items of the filter to be tested 130 to obtain real and effective test data, thereby meeting the application requirements in the field of engineering machinery.

[0074] At the same time, the filter testing system provided in this embodiment also has the following advantages:

[0075] 1. Strong functionality and reasonable structural design;

[0076] 2. This test system can realize the function of single working condition and single project testing, and can also perform multi-working condition simulation and multi-project testing at the same time. It can be set and converted by the control system;

[0077] 3. The three-comprehensive environment experiment box 141 has a high degree of simulation, so that the data detected by the multiple data analysis devices 150 are real and accurate;

[0078] 4. The filter testing system provided in this embodiment can realize the simultaneous testing of multiple projects through a set of systems, which greatly saves the testing time, consumables and the required equipment costs.

[0079] Embodiment 2

[0080] See also Figure 1 The filter testing system provided in this embodiment is used to test the filter performance and can provide real and effective test data for the filter testing in the field of engineering machinery. The filter testing system provided in this embodiment is an improvement made on the basis of the above-mentioned embodiment 1. Compared with the above-mentioned embodiment 1, the main differences are:

[0081] Please refer to Figure 1 and Figure 2In the present embodiment, the test circuit 100 further includes a first three-way valve 170, wherein the first three-way valve 170 is disposed on the main line 100a between the first pump 120 and the filter to be tested 130, and the first three-way valve 170 is close to the outlet side of the first pump 120, one of the outlet ends of the first three-way valve 170 is connected to the test oil tank 110 through a first branch line 100b, and the other outlet end of the first three-way valve 170 is connected to the main line 100a.

[0082] It can be understood that by adjusting the valve core position of the first three-way valve 170, the test medium in the test tank 110 can be selected to enter the filter 130 to be tested along the main pipeline 100a or directly return to the test tank 110 along the first branch pipeline 100b. In other words, on the one hand, when a new filter 130 to be tested needs to be replaced, the flow direction of the test medium can be switched to the first branch pipeline 100b and directly return to the test tank 110 by controlling the first three-way valve 170, thereby avoiding frequent start and stop of the first pump 120 and extending the service life; on the other hand, after the test medium is loaded into the test tank 110, the flow direction of the test medium can be switched to the first branch pipeline 100b and directly return to the test tank 110 by controlling the first three-way valve 170, thereby achieving full mixing of impurities in the test medium and improving the accuracy of data in subsequent tests.

[0083] In some specific embodiments, the first three-way valve 170 can be an electric three-way valve or a manual three-way valve.

[0084] Please refer to Figure 2 and Figure 4 Here, this embodiment also provides a filter testing method, which applies the filter testing method provided in the embodiment above. The filter testing method provided in this embodiment is improved based on the filter testing method provided in the above embodiment 1, and the filter testing method provided in this embodiment includes:

[0085] S100: Load the test medium into the test oil tank 110, switch the first three-way valve 170 to connect with the first branch pipeline 100b, start the first pump 120 to circulate the test medium in the test oil tank 110, so that the solid impurities, water and oil in the test medium are fully mixed.

[0086] S200: After the solid impurities, water and oil in the test medium are fully mixed, the simulated working conditions are set through the environmental simulation device 140, the first three-way valve 170 is switched to be connected to the main line 100a, and the test is started. The multiple data analysis devices 150 respectively detect the test medium in real time.

[0087] S300 : Reading the test data of each data analysis device 150 .

[0088] Embodiment 3

[0089] See also Figure 1 The filter testing system provided in this embodiment is used to test the filter performance and can provide real and effective test data for the filter testing applied in the field of engineering machinery. The filter testing system provided in this embodiment is an improvement made on the basis of the above-mentioned embodiment 1 or embodiment 2. Compared with the above-mentioned embodiment 1 or embodiment 2, the main difference is:

[0090] Please refer to Figure 1 and Figure 2 In this embodiment, the test circuit 100 also includes a second three-way valve 180, wherein the second three-way valve 180 is arranged on a side of the filter to be tested 130 away from the first pump 120. In other words, the second three-way valve 180 is arranged on the main line 100a and is located on the outlet side of the filter to be tested 130.

[0091] The two outlets of the second three-way valve 180 divide the main pipeline 100a into two branches, and the outlets of the two branches converge into one main pipeline 100a and then return to the test oil tank 110. Specifically, one outlet of the second three-way valve 180 is connected to an absolute filter 181 and a check valve 182 through the second branch pipeline 100c, and the other outlet of the second three-way valve 180 is connected to the main pipeline between the check valve 182 and the test oil tank 110 through the third branch pipeline 100d. It can be understood that the second branch pipeline 100c and the third branch pipeline 100d are arranged in parallel, wherein the check valve 182 can prevent the test medium transported by the third branch pipeline 100d from entering the second branch pipeline 100c again, so as to prevent the second branch pipeline 100c from being contaminated by the test medium transported by the third branch pipeline 100d.

[0092] Furthermore, the intersection of the second branch pipeline 100c and the third branch pipeline 100d is located on the side of the first flowmeter 160 away from the test oil tank 110 to ensure that the first flowmeter 160 can monitor the flow of the second branch pipeline 100c or the third branch pipeline 100d in real time.

[0093] In this embodiment, by adjusting the valve core of the second three-way valve 180 , the test medium from the filter 130 to be tested can be selectively connected to the main pipeline 100a along the second branch pipeline 100c or the third branch pipeline 100d and then returned to the test oil tank 110 .

[0094] When the test medium filtered by the test filter 130 enters the second branch pipeline 100 c through the second three-way valve 180 , it will then pass through the absolute filter 181 and the one-way valve 182 in sequence and then flow into the main pipeline 100 a , and then return to the test oil tank 110 .

[0095] It can be understood that the maximum filtering accuracy of the absolute filter 181 can reach 99.9%. The remaining impurities in the test medium after being filtered by the test filter 130 will be filtered out by the absolute filter 181, so that the test medium flowing back to the test tank 110 through the absolute filter 181 is a clean medium. When the test medium in the test tank 110 completes a complete cycle, the test medium remaining in the test tank 110 is a clean medium, and the clean medium can be prepared for the next test.

[0096] Therefore, the combination of the filter to be tested 130 and the absolute filter 181 realizes a single cycle test, that is, a one-cycle test. When a second single cycle test is required, the same amount of impurities as in the last test is added to the test oil tank 110, and the filter to be tested 130 is tested again. Similarly, when a third, fourth or other test is required, the operation steps are the same as the second single cycle test. Furthermore, the filtering effect of the filter to be tested 130 in one cycle can be measured through the single cycle test.

[0097] When the test medium filtered by the filter to be tested 130 enters the third branch pipeline 100 d through the second three-way valve 180 , it is directly merged into the main pipeline 100 a and then returns to the test oil tank 110 .

[0098] It can be understood that after the test medium is filtered by the filter 130 to be tested, it enters the third branch pipeline 100d through the second three-way valve 180 and then directly flows into the main pipeline 100a to return to the test oil tank 110, and no longer passes through the absolute filter 181 of the second branch pipeline 100c. Therefore, the test medium flows into the test oil tank 110 from the third branch pipeline 100d to achieve multi-cycle testing. That is, the test medium in the oil tank meets the cleanliness requirement after being filtered by the filter 130 for multiple cycles, and then the effect of multiple cycles of the filter 130 to be tested is detected.

[0099] From the above, it can be seen that the filter testing system provided in this embodiment has single-cycle testing and multi-cycle testing functions. Single-cycle testing or multi-cycle testing is selected for the filter 130 to be tested under different working conditions to achieve testing of the effect of a single cycle or multiple cycles of the filter 130 to be tested, thereby providing more real and effective test data.

[0100] In some specific embodiments, the second three-way valve 180 can be an electric three-way valve or a manual three-way valve.

[0101] Please refer to Figure 2 , Figure 3 as well as Figure 4Here, this embodiment also provides a filter testing method, which applies the filter testing method provided in this embodiment. The filter testing method provided in this embodiment is an improvement made on the basis of the filter testing method provided in the first or second embodiment, and the main difference is:

[0102] Step S20 or S200 also includes switching the second three-way valve 180 to connect the second branch pipeline 100c or the third branch pipeline 100d, that is, realizing the selection of single-cycle test and multi-cycle test.

[0103] Embodiment 4

[0104] See also Figure 5 The filter testing system provided in this embodiment is used to test the filter performance and can provide real and effective test data for the filter testing in the field of engineering machinery. The filter testing system provided in this embodiment is an improvement made on the basis of any one of the above embodiments 1 to 3. Compared with any one of the above embodiments, the main difference is:

[0105] Please refer to Figure 5 and Figure 6 In this embodiment, the filter test system further includes a dirt injection device 200 and a water injection device 300, and the dirt injection device 200 and the water injection device 300 are respectively connected to the test oil tank 110. It can be understood that when the dirt injection device 200 is used, it is used to add solid impurities into the test oil tank 110; when the water injection device 300 is used, it is used to add liquid impurities into the test oil tank 110. In this embodiment, the liquid impurities are water.

[0106] Please refer to Figure 6 and Figure 7 , wherein the sewage injection device 200 includes a sewage injection tank 210, a second pump 220 and a second flowmeter 240, and the sewage injection tank 210, the second pump 220, the second flowmeter 240 and the test oil tank 110 are connected in sequence through a sewage injection pipe 200a. The sewage injection tank 210 is used to store a solution of solid impurities, which is then transported to the test oil tank 110 by the second pump 220. The second flowmeter 240 monitors the flow in the sewage injection pipe 200a, and then controls the amount of solid impurities transported by the second pump 220 through a feedback signal, that is, accurately controls the amount of fixed impurities added to the test oil tank 110.

[0107] In some specific embodiments, the dirty oil tank 210 is provided with a stirring mechanism 211, and the stirring mechanism 211 is driven by a motor to stir the stirring shaft, wherein the stirring mechanism 211 is used to stir the solution of solid impurities in the dirty oil tank 210, so that the solid impurities in the dirty oil tank 210 are evenly dispersed in the solution, avoiding the risk of precipitation or clogging of the pipeline.

[0108] Furthermore, a third three-way valve 230 is provided on the waste injection pipe 200a between the second pump 220 and the second flow meter 240, and an outlet end of the third three-way valve 230 is connected to the waste injection oil tank 210 through a fourth branch pipeline 200b.

[0109] It is understandable that when the outlet of the third three-way valve 230 is connected to the fourth branch pipeline 200b, the solid impurities transported by the second pump 220 will circulate in the dirty oil tank 210, so that the solid impurities in the dirty oil tank 210 are evenly dispersed in the solution, avoiding the risk of precipitation or clogging the pipeline. On the other hand, frequent start and stop of the second pump 220 is avoided.

[0110] In some specific embodiments, the third three-way valve 230 can be an electric three-way valve or a manual three-way valve.

[0111] Furthermore, when the third three-way valve 230 is an electric three-way valve, the second flowmeter 240 can control the switching between the two outlet ports of the third three-way valve 230 through a feedback signal, thereby accurately controlling the amount of fixed impurities added to the test oil tank 110. In other words, when the amount of fixed impurities added to the test oil tank 110 reaches a preset value, the third three-way valve 230 bypasses the solution of solid impurities transported by the second pump 220 to the dirty injection tank 210 through the fourth branch pipeline 200b. When solid impurities need to be added to the test oil tank 110 again, the third three-way valve 230 only needs to be switched to be connected to the dirty injection pipe 200a, thereby avoiding frequent starting and stopping of the second pump 220 and extending the service life of the second pump 220.

[0112] The water injection device 300 includes a water injection tank 310, a third pump 320, a third flowmeter 340 and a water particle size device 350. The water injection tank 310, the third pump 320, the third flowmeter 340, the water particle size device 350 and the test oil tank 110 are connected in sequence through a water injection pipe 300a. The water injection tank 310 is used to store liquid impurities. In this embodiment, the liquid impurities are water, which is transported to the test oil tank 110 by the third pump 320 to mix with the oil. The third flowmeter 340 monitors the flow in the water injection pipe 300a, and then controls the amount of water transported by the third pump 320 through a feedback signal, that is, accurately controls the amount of water added to the test oil tank 110.

[0113] Furthermore, in order to allow water to be fully mixed with oil in the test oil tank 110, the water particle size device 350 can disperse the water into water particles of a predetermined particle size, and then enter the test oil tank 110 for mixing, so that the mixing is more uniform, thereby improving the test accuracy.

[0114] Furthermore, a fourth three-way valve 330 is provided between the third pump 320 and the third flow meter 340 , and an outlet end of the fourth three-way valve 330 is connected to the water injection tank 310 through a fifth branch pipeline 300 b .

[0115] It can be understood that when the water content injected into the test oil tank 110 reaches a preset value and the outlet of the fourth three-way valve 330 is connected to the fifth branch pipe 300b, the water delivered by the third pump 320 will circulate in the water tank. When water needs to be added to the test oil tank 110 again, the fourth three-way valve 330 is switched to be connected to the water injection pipe 300a again, thereby avoiding frequent starting and stopping of the third pump 320 and extending the service life of the third pump 320.

[0116] In some specific embodiments, the fourth three-way valve 330 can be an electric three-way valve or a manual three-way valve.

[0117] Furthermore, when the fourth three-way valve 330 is an electric three-way valve, the third flow meter 340 can control the switching between the two outlet ports of the fourth three-way valve 330 through a feedback signal, thereby accurately controlling the amount of water added to the test oil tank 110 .

[0118] It is also understandable that the above-mentioned sewage injection equipment 200 and water injection equipment 300 can be carried out separately or simultaneously.

[0119] The filter testing system provided in this embodiment accurately controls the amount of solid impurities and water added to the test oil tank 110 through the pollution injection device 200 and the water injection device 300, thereby improving the authenticity, validity and accuracy of the test data.

[0120] Please refer to Figure 3 , Figure 4 , Figure 6 as well as Figure 7 Here, this embodiment also provides a filter testing method, which applies the filter testing method provided in this embodiment. The filter testing method provided in this embodiment is an improvement made on the basis of the filter testing method provided in any one of the embodiments 1 to 3, and the main difference is:

[0121] The action of filling the test medium into the test oil tank 110 in step S10 or S100 is completed by the dirt injection device 200 and the water injection device 300. That is, the dirt injection device 200 and the water injection device 300 are started to add solid impurities or water into the test oil tank 110, and the test medium is obtained after mixing.

[0122] The injection amount of the sewage injection device 200 is in the range of 0 to 15 L / min, and the injection amount of the water injection device 300 is in the range of 0 to 6 L / min. The sewage injection device 200 and the water injection device 300 control the amount of the sewage injection device 200 and the water injection device 300 injected into the test oil tank 110 in proportion according to the test requirements.

[0123] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0124] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A filter testing system, characterized in that: The test circuit includes a test oil tank, a first pump, a filter to be tested, a plurality of data analysis devices and an environmental simulation device; The test oil tank, the first pump and the filter to be tested are sequentially connected to form a circulation loop, wherein: the filter to be tested is arranged in the environmental simulation device; A plurality of the data analysis devices are respectively arranged in parallel with the filters to be tested; The test circuit further comprises a first three-way valve, which is arranged between the first pump and the filter to be tested, and an outlet end of the first three-way valve is connected to the test oil tank through a first branch pipeline; The test circuit further comprises a second three-way valve, wherein the second three-way valve is arranged on a side of the filter to be tested away from the first pump; One outlet end of the second three-way valve is connected to an absolute filter, a one-way valve and the test oil tank in sequence through pipelines; The other outlet end of the second three-way valve is connected to the pipeline between the one-way valve and the test oil tank through a pipeline.

2. The filter testing system according to claim 1, characterized in that: The plurality of data analysis devices include at least two of a differential pressure meter, a foreign particle analyzer, or a water content analyzer.

3. The filter testing system according to claim 1, characterized in that: The environmental simulation device comprises a three-integrated environmental test box, and the filter to be tested is arranged in the three-integrated environmental test box.

4. The filter testing system according to claim 1, characterized in that: The test loop further includes a first flow meter, which is placed between the filter to be tested and the test oil tank, and the first flow meter is close to the test oil tank.

5. The filter testing system according to any one of claims 1 to 4, characterized in that: The filter testing system further comprises a dirt injection device and a water injection device, wherein the dirt injection device and the water injection device are respectively connected to the testing oil tank.

6. The filter testing system according to claim 5, characterized in that: The sewage injection equipment includes a sewage injection tank, a second pump and a second flow meter; The dirty oil tank, the second pump, the second flow meter and the test oil tank are connected in sequence.

7. The filter testing system according to claim 6, characterized in that: A third three-way valve is provided between the second pump and the second flow meter, and an outlet end of the third three-way valve is connected to the dirty oil tank through a fourth branch pipeline.

8. The filter testing system according to claim 5, characterized in that: The water injection equipment includes a water injection tank, a third pump, a third flow meter and a water particle size device; The water injection tank, the third pump, the third flow meter, the water particle size device and the test oil tank are connected in sequence; A fourth three-way valve is provided between the third pump and the third flow meter, and an outlet end of the fourth three-way valve is connected to the water injection tank through a fifth branch pipeline.

9. A filter testing method, characterized in that: Using the filter testing system as described in any one of claims 1 to 8; The filter testing method comprises: loading a testing medium into the testing oil tank, and setting a simulated working condition through the environmental simulation device; The first pump is started, and the plurality of data analysis devices respectively detect the test medium in real time; Read each test data detected by the data analysis device.

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