Novel air filter performance test method and system

Abstract

The invention discloses a novel air filter performance test method, relates to the field of engine performance, and solves the technical problem that an existing air filter test mode cannot meet the requirement for air filter capacity evaluation. The method comprises the following steps: setting a plurality of test combination modes according to the types of the air filter and the pipeline, carrying out performance test on the test combination modes in sequence to obtain a maximum air inlet negative pressure value, and evaluating the air filter performance according to a preset air inlet negative pressure evaluation standard interval in which the maximum air inlet negative pressure value is located. The invention further discloses a novel air filter performance test system. According to the method, the defect that whether air filtering is appropriate or not is evaluated only according to the air inlet flow in an existing method is overcome, various problems caused by air filtering faults in the using process of the engine are reduced, the vacancy of air filtering performance testing during engine performance testing in the past is made up, and the whole engine performance development process is more perfect.

Description

Technical Field

[0001] The invention relates to the field of engine performance, and more specifically, to a novel air filter performance test method and system. Background Art

[0002] The engine air filter performance test is only provided by the supplier. When conducting engine tests, the appropriate air filter is evaluated and selected only through the actual engine intake flow measured when no air filter is installed and the maximum air filter flow capacity provided by the supplier. However, there is no actual test to see whether the performance of the air filter meets the requirements after it is installed on the engine. If the air filter performance test is not performed, various faults such as air filter flattening and blockage will occur over time, causing losses.

[0003] When developing engine performance, the air filter capacity is evaluated only through the maximum capacity of the air filter provided by the supplier and the intake flow measured in the bench test to see if it meets the requirements. The air filter selected in this way may still have shortcomings such as air filter flattening and clogging when the engine is actually used. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a new air filter performance test method in view of the deficiencies in the prior art, so as to solve the technical problem that the existing air filter test method cannot meet the requirements of evaluating the air filter capacity.

[0005] The present invention discloses a novel air filter performance test method, which comprises the following steps: setting a plurality of test combinations according to the types of air filters and pipelines, performing performance tests on the test combinations in sequence, obtaining a maximum intake negative pressure value, and evaluating the air filter performance according to whether the maximum intake negative pressure value is in a preset intake negative pressure evaluation standard interval.

[0006] As a further improvement, the test combination mode includes a first test mode, a second test mode and a third test mode;

[0007] The first test method is to install a mass-produced pipeline and a mass-produced air filter, and obtain a first maximum intake negative pressure value according to the first test method;

[0008] The second test method is an installation combination of a tooling pipeline and a mass-produced air filter, and a second maximum intake negative pressure value is obtained according to the second test method;

[0009] The third test method is to install the tooling pipeline and remove the installation combination of the air filter, and obtain the third maximum intake negative pressure value according to the third test method.

[0010] Further, the method for evaluating the air filter performance is:

[0011] The intake negative pressure evaluation standard interval includes a first intake evaluation standard interval, a second intake evaluation standard interval, a third intake evaluation standard interval and a fourth intake evaluation standard interval;

[0012] When the first maximum intake negative pressure value is within the first intake evaluation standard interval and the second maximum intake negative pressure value is within the third intake evaluation standard interval, it indicates that the mass-produced air filter operates normally;

[0013] When the first maximum intake negative pressure value is within the second intake evaluation standard interval, it indicates that the volume of the mass-produced air filter in the first test mode is smaller than the preset air filter standard volume or the connecting pipeline length of the mass-produced air filter is smaller than the preset pipeline length standard value;

[0014] When the second maximum intake negative pressure value is within the fourth intake evaluation standard interval, it indicates that the volume of the mass-produced air filter in the second test mode is smaller than the standard volume of the air filter;

[0015] When the first maximum intake negative pressure value is within the second intake evaluation standard interval and the second maximum intake negative pressure value is within the third intake evaluation standard interval, it indicates that the connecting pipeline length of the mass-produced air filter is less than the pipeline length standard value.

[0016] Furthermore, when the test is completed, when the pointer of the air resistance indicator points to the green scale, it indicates that the mass-produced air filter is operating normally. When the pointer of the air resistance indicator points to the red scale or the yellow scale, it indicates that the mass-produced air filter has a fault.

[0017] Furthermore, when the first maximum intake negative pressure value is within the second intake evaluation standard interval or the second maximum intake negative pressure value is within the fourth intake evaluation standard interval and the pointer of the air resistance indicator points to the green scale, it indicates that the air resistance indicator is faulty.

[0018] Furthermore, the intake air evaluation standard interval includes a first intake air evaluation standard interval, a second intake air evaluation standard interval, a third intake air evaluation standard interval and a fourth intake air evaluation standard interval;

[0019] Setting a first intake air evaluation standard value and a second intake air evaluation standard value;

[0020] The intake negative pressure value in the first intake evaluation standard interval is greater than or equal to the first intake evaluation standard value;

[0021] The intake negative pressure value in the second intake evaluation standard interval is less than the first intake evaluation standard value;

[0022] The intake negative pressure value in the third intake evaluation standard interval is greater than or equal to the second intake evaluation standard value;

[0023] The intake negative pressure value in the fourth intake evaluation standard interval is smaller than the second intake evaluation standard value.

[0024] A system using the novel air filter performance test method comprises:

[0025] Air filter installation position, used to install mass-produced air filters or tooling air filters;

[0026] The pipeline installation position is used to install mass production pipelines or tooling pipelines, and is located between the air filter installation position and the supercharger.

[0027] As a further improvement, the length of the pipeline installation position is at least six times the inner diameter of the air outlet of the air filter installed in the air filter installation position.

[0028] Furthermore, an intake negative pressure measuring point is arranged at a pipeline installation position close to the inlet of the supercharger compressor and at a distance three times the inner diameter of the air outlet of the air filter.

[0029] Beneficial Effects

[0030] The advantages of the present invention are:

[0031] The present invention sets a plurality of test combinations according to the types of air filters and pipelines, performs performance tests on the test combinations in sequence, obtains a maximum intake negative pressure value, and evaluates the air filter performance according to the maximum intake negative pressure value being in a preset intake negative pressure evaluation standard interval. In this way, a suitable air filter that meets the performance requirements can be matched during engine performance test development, effectively improving the disadvantage of the existing method of evaluating whether the air filter is suitable only based on the intake flow rate, reducing various problems caused by air filter failure during engine use, making up for the lack of air filter performance testing during previous engine performance testing, and making the entire engine performance development process more perfect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the installation of the novel air filter performance test system of the present invention.

[0033] Among them: 1-air filter installation position, 2-air filter outlet, 3-supercharger, 4-pipeline installation position. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0035] See also Figure 1The present invention discloses a novel air filter performance test method. The method is to set a plurality of test combinations according to the types of air filters and pipelines, perform performance tests on the test combinations in sequence, obtain the maximum intake negative pressure value, and evaluate the air filter performance according to the preset intake negative pressure evaluation standard interval in which the maximum intake negative pressure value is located. The air filter that meets the performance requirements can be matched during the engine performance test development, which effectively improves the disadvantage of the existing method of evaluating whether the air filter is suitable only for the intake flow rate, reduces various problems caused by air filter failure during the use of the engine, and makes up for the lack of air filter performance testing in the past when the engine performance test is performed, making the entire engine performance development process more perfect.

[0036] like Figure 1 As shown, the present invention also discloses a novel air filter performance test system, which comprises:

[0037] Air filter installation position 1 is used to install mass-produced air filters or tooling air filters.

[0038] The pipeline installation position 4 is used to install mass production pipelines or tooling pipelines, and is located between the air filter installation position 1 and the supercharger 3.

[0039] The length of the pipeline installation position 4 is at least six times the inner diameter of the air outlet of the air filter installed in the air filter installation position 1.

[0040] An intake negative pressure measuring point is arranged at the pipeline installation position 4 near the compressor inlet of the supercharger 3, at a distance three times the inner diameter of the air filter outlet. The intake negative pressure measuring point is used to obtain the maximum intake negative pressure value.

[0041] This embodiment sets three test combinations:

[0042] The three test combination modes include a first test combination mode, a second test combination mode and a third test combination mode.

[0043] The first test combination is the installation combination of mass production pipeline and mass production air filter, and the first maximum intake negative pressure value is obtained according to the first test combination. The mass production air filter refers to the air filter that is initially selected to meet the intake flow requirements, and a negative pressure and intake temperature measurement point needs to be arranged near the negative pressure indicator.

[0044] The second test combination method is an installation combination of a tooling pipeline and a mass-produced air filter, and the second maximum intake negative pressure value is obtained according to the second test combination method.

[0045] like Figure 1As shown, the air outlet of the test model air filter is connected to the inlet of the supercharger 3 compressor through the tooling pipeline. The tooling pipeline uses a straight pipe with a length of at least 6D (D is the inner diameter of the air outlet 2 of the test model air filter), connected to the air flow direction close to the inlet of the supercharger 3 compressor, and an intake negative pressure and intake temperature measurement point is set in the middle of the tooling pipeline (i.e., at a distance of at least 3D from the air outlet 2 of the test model air filter).

[0046] The third test combination is an installation combination of tooling pipelines and removing the air filter. The third maximum intake negative pressure value is obtained according to the third test combination.

[0047] Different performance tests are carried out according to the purpose of the engine (marine main engine, marine auxiliary engine and generator, etc.). For example, after the performance configuration of the marine auxiliary engine is finalized, the external characteristic test, load characteristic test and transient test are carried out in sequence according to the above three test combinations. During the test, the air filter resistance indicator and the status of the air filter element need to be paid special attention.

[0048] The intake air evaluation standard interval includes a first intake air evaluation standard interval, a second intake air evaluation standard interval, and a third intake air evaluation standard interval.

[0049] A first intake air evaluation standard value and a second intake air evaluation standard value are set. In this embodiment, the first intake air evaluation standard value is -4 kPa, and the second intake air evaluation standard value is -3 kPa.

[0050] The intake negative pressure value in the first intake evaluation standard interval is greater than or equal to the first intake evaluation standard value.

[0051] The intake negative pressure value in the second intake evaluation standard interval is smaller than the first intake evaluation standard value.

[0052] The intake negative pressure value in the third intake evaluation standard interval is greater than or equal to the second intake evaluation standard value.

[0053] The intake negative pressure value in the fourth intake evaluation standard interval is smaller than the second intake evaluation standard value.

[0054] The method for evaluating air filter performance is:

[0055] After the test is completed, first visually check the air filter and filter element to see if there are any abnormal problems such as cracks, cracks, flattening, wrinkles, etc.

[0056] When the first maximum intake negative pressure value is within the first intake evaluation standard interval and the second maximum intake negative pressure value is within the third intake evaluation standard interval, it indicates that the mass-produced air filter operates normally.

[0057] When the first maximum intake negative pressure value is within the second intake evaluation standard interval, it indicates that the volume of the mass-produced air filter in the first test combination is smaller than the preset air filter standard volume or the connecting pipe length of the mass-produced air filter is smaller than the preset pipe length standard value, reminding personnel to replace the air filter or the connecting pipe of the mass-produced air filter.

[0058] When the second maximum intake negative pressure value is within the fourth intake evaluation standard interval, it indicates that the volume of the mass-produced air filter in the second test combination is smaller than the standard volume of the air filter.

[0059] When the first maximum intake negative pressure value is within the second intake evaluation standard interval and the second maximum intake negative pressure value is within the third intake evaluation standard interval, it indicates that the connecting pipe length of the mass-produced air filter is less than the standard value of the pipe length, reminding personnel to replace the connecting pipe of the mass-produced air filter.

[0060] When the test is completed, if the air resistance indicator pointer points to the green scale, it means that the mass-produced air filter is operating normally. If the air resistance indicator pointer points to the red or yellow scale, it means that the mass-produced air filter is faulty. Remind personnel to check and replace the mass-produced air filter.

[0061] When the first maximum intake negative pressure value is not within the first intake evaluation standard interval or the second maximum intake negative pressure value is not within the third intake evaluation standard interval and the pointer of the air resistance indicator points to the green scale, it indicates that the air resistance indicator is faulty.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A novel air filter performance test method, characterized in that: The method is to set a plurality of test combinations according to the types of air filters and pipelines, perform performance tests on the test combinations in turn, obtain a maximum intake negative pressure value, and evaluate the air filter performance according to whether the maximum intake negative pressure value is in a preset intake negative pressure evaluation standard interval.

2. A novel air filter performance test method according to claim 1, characterized in that: The test combination mode includes a first test mode, a second test mode and a third test mode; The first test method is an installation combination of a mass-produced pipeline and a mass-produced air filter, and a first maximum intake negative pressure value is obtained according to the first test method; The second test method is an installation combination of a tooling pipeline and a mass-produced air filter, and a second maximum intake negative pressure value is obtained according to the second test method; The third test method is to install the tooling pipeline and remove the installation combination of the air filter, and obtain the third maximum intake negative pressure value according to the third test method.

3. A novel air filter performance test method according to claim 2, characterized in that: The method for evaluating the air filter performance is: The intake negative pressure evaluation standard interval includes a first intake evaluation standard interval, a second intake evaluation standard interval, a third intake evaluation standard interval and a fourth intake evaluation standard interval; When the first maximum intake negative pressure value is within the first intake evaluation standard interval and the second maximum intake negative pressure value is within the third intake evaluation standard interval, it indicates that the mass-produced air filter operates normally; When the first maximum intake negative pressure value is within the second intake evaluation standard interval, it indicates that the volume of the mass-produced air filter in the first test mode is smaller than the preset air filter standard volume or the connecting pipeline length of the mass-produced air filter is smaller than the preset pipeline length standard value; When the second maximum intake negative pressure value is within the fourth intake evaluation standard interval, it indicates that the volume of the mass-produced air filter in the second test mode is smaller than the standard volume of the air filter; When the first maximum intake negative pressure value is within the second intake evaluation standard interval and the second maximum intake negative pressure value is within the third intake evaluation standard interval, it indicates that the connecting pipeline length of the mass-produced air filter is less than the pipeline length standard value.

4. A novel air filter performance test method according to claim 3, characterized in that: When the test is completed, when the needle of the air resistance indicator points to the green scale, it indicates that the mass-produced air filter is operating normally. When the needle of the air resistance indicator points to the red scale or the yellow scale, it indicates that the mass-produced air filter has a fault.

5. A novel air filter performance test method according to claim 4, characterized in that: When the first maximum intake negative pressure value is within the second intake evaluation standard interval or the second maximum intake negative pressure value is within the fourth intake evaluation standard interval and the pointer of the air resistance indicator points to the green scale, it indicates that the air resistance indicator is faulty.

6. A novel air filter performance test method according to claim 1, characterized in that: The intake air evaluation standard interval includes a first intake air evaluation standard interval, a second intake air evaluation standard interval, a third intake air evaluation standard interval and a fourth intake air evaluation standard interval; Setting a first intake air evaluation standard value and a second intake air evaluation standard value; The intake negative pressure value in the first intake evaluation standard interval is greater than or equal to the first intake evaluation standard value; The intake negative pressure value in the second intake evaluation standard interval is less than the first intake evaluation standard value; The intake negative pressure value in the third intake evaluation standard interval is greater than or equal to the second intake evaluation standard value; The intake negative pressure value in the fourth intake evaluation standard interval is smaller than the second intake evaluation standard value.

7. A system using the novel air filter performance test method according to any one of claims 1 to 6, characterized in that: It includes, Air filter installation position, used to install mass-produced air filters or tooling air filters; The pipeline installation position is used to install mass production pipelines or tooling pipelines, and is located between the air filter installation position and the supercharger.

8. According to the novel air filter performance test system of claim 7, the length of the pipeline installation position is at least six times the inner diameter of the air outlet of the air filter installed in the air filter installation position.

9. According to the novel air filter performance test system of claim 7, an intake negative pressure measuring point is arranged on a pipeline installation position near the inlet of the supercharger compressor and at a distance three times the inner diameter of the air outlet of the air filter.

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