CN210863478U - Filter core integrality test bench - Google Patents
Filter core integrality test bench Download PDFInfo
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- CN210863478U CN210863478U CN201921419336.6U CN201921419336U CN210863478U CN 210863478 U CN210863478 U CN 210863478U CN 201921419336 U CN201921419336 U CN 201921419336U CN 210863478 U CN210863478 U CN 210863478U
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Abstract
The utility model discloses a filter element integrity test bed, which comprises a test bed frame and a test bed base which are fixedly arranged, wherein a lifting cylinder for driving an immersion groove to lift is fixedly arranged on the test bed base, and a liquid storage tank for feeding liquid into the immersion groove and recovering the test liquid in the immersion groove is also fixedly arranged on the test bed base; the liquid storage tank is provided with a gas circuit connected with a gas source and at least one liquid circuit connected with the soaking tank; a clamping and rotating mechanism of the filter element is arranged in the soaking tank, and an air inlet connector communicated with the inner cavity of the filter element is arranged on the clamping and rotating mechanism. The test liquid of the utility model adopts alcohol and isopropanol, and the filter element can be normally used after test, thus reducing the waste of the filter element caused by test; and the test solution can be recovered, thereby avoiding the test solution from volatilizing, polluting the environment and damaging testers.
Description
Technical Field
The utility model relates to a filter core integrality test bench.
Background
The filter is a filter that filters impurities or gas through filter paper. Generally referred to as an automobile filter, is an accessory of an engine. The method is divided into the following steps according to different filtering functions: oil filters, fuel filters (gasoline filters, diesel filters, oil-water separators, hydraulic filters), air filters, air-conditioning filters, and the like. The engine has three filters of air, engine oil and fuel oil, generally called three filters, and an air-conditioning filter, commonly called four filters. Respectively takes charge of the filtration of a lubricating system, a medium in a combustion system, an engine air inlet system and a carriage air circulating system. The filter element in the filter needs to be checked for the filtering effect by detecting the integrity of the filter element before leaving the factory. Bubble point is one of the methods, and a commonly used integrity test method includes: initial bubble point, structural integrity, water intrusion for hydrophobic filtration membranes; and detecting the maximum aperture and air permeability of the filter material through a bubble test so as to mark the filtration precision and the air permeability of the filter material. The existing filter element integrity test bed adopts diesel oil for testing, the filter element is thrown away when being polluted by the diesel oil after the test, and if the test solution adopts alcohol and isopropanol, the filter element can be used after the test is finished, so that the waste of the filter element caused by the test is reduced; in addition, the test solution of the current test bed is not recycled, and is always in a liquid tank and is easy to be polluted or oxidized and deteriorated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a filter element integrity test bed, wherein the test liquid adopts alcohol and propanol, and the filter element can be used after test, thereby reducing the waste of the filter element caused by test; and the test solution can be recovered, thereby avoiding the test solution from volatilizing, polluting the environment and damaging testers.
In order to achieve the purpose, the technical scheme of the utility model is to design a filter element integrity test bed, which comprises a test bed frame and a test bed base which are fixedly arranged, wherein a lifting cylinder for driving a soaking tank to lift is fixedly arranged on the test bed base, and a liquid storage tank for feeding liquid into the soaking tank and recovering the test liquid in the soaking tank is also fixedly arranged on the test bed base; the liquid storage tank is provided with a gas circuit connected with a gas source and at least one liquid circuit connected with the soaking tank; a clamping and rotating mechanism of the filter element is arranged in the soaking tank, and an air inlet connector communicated with the inner cavity of the filter element is arranged on the clamping and rotating mechanism. The liquid storage pot not only is to soaking the groove feed liquor, still utilizes the gravity of test solution, through opening the liquid way valve with retrieving used test solution, because the volatile characteristic of ethanol, isopropyl alcohol, so retrieve the liquid storage pot to test solution after the test is accomplished, avoid test solution to volatilize, the polluted environment, harm the tester. Of course, the test person needs to wear protective articles during the test.
The further technical scheme is that an inner groove of the soaking groove is fixedly arranged on the test bed rack, a plurality of through holes are formed in the inner groove, an outer groove is arranged below the inner groove, and a piston rod of the lifting cylinder is fixedly connected to the bottom surface of the outer groove of the soaking groove. The advantage of double flute lies in that after the test is accomplished, the outer tank descends, and the product to be tested can break away from test liquid rapidly, and the leading-in compressed air weathers the product. The tested products can be used continuously, so that the detection of a large number of products is facilitated. The pressure of the compressed air used for drying was 1Kpa or less (the pressure of the compressed air was gradually increased at the time of detection, and the test recorded two pressure values at the time of generation of the first bubble to the group of bubbles).
The further technical proposal is that ethanol or isopropanol is arranged in the liquid storage tank; the air source is a compressed air source, the air path is provided with a valve, and at least two air paths are arranged, one air path is connected with the cavity in the filter element, and the other air path is connected with the upper end of the liquid storage tank; the liquid path is provided with one valve. The liquid storage pot is less than the soaking groove in height, so the liquid storage pot through letting in compressed air to soaking groove feed liquor after, the valve on liquid way is opened again to the test completion, soak in the test liquid in the inslot because gravity gets back to in the liquid storage pot again, play the effect of retrieving test liquid.
The clamping and rotating mechanism comprises two guide rods, the two guide rods are arranged in parallel to form a rectangle, one end of each guide rod is fixedly provided with a fixed plate, the other end of each guide rod is fixedly provided with a connecting plate perpendicular to the guide rods, an adjusting plate is also arranged on the guide rod between the connecting plate and the fixed plate in a sliding manner, a screw hole is formed in the connecting plate, a screw rod is arranged in a manner of being matched with the screw hole, a screw hole is also formed in the adjusting plate, a threaded hole is formed in one side of the adjusting plate, which is located on the screw hole, an adjusting handle with a screw rod is arranged in a manner of being matched with the threaded hole; a pipe of fixed connection on the fixed plate, the pipe passes fixed plate and one end and is linked together with the gas circuit, the other end backs up the end cover of opening the filter core and the gasket of filter core links to each other with the inside cavity of filter core, the fixed first sprocket that sets up on the pipe that is located between fixed plate and the filter core end cover, the rotation axis of first sprocket and the central symmetry axis collineation of pipe, the top that is located first sprocket is equipped with the second sprocket of being connected with the fixed plate rotation, the shaft of second sprocket stretches out the fixed plate and links to each other with the drive wheel is fixed, the meshing is equipped with the chain on first sprocket and. Its screw rod of adjustment handle and the tip looks adaptation of filter core, the top of its screw rod of adjustment handle and the bottom looks adaptation of filter core, the round slot mouth that the screw rod inserted the filter core bottom is used for just supporting the bottom of filter core, and the filter core rotates differently when being convenient for follow-up test, sets up the ball in the round slot mouth of filter core bottom. The screw rod on the connecting plate is used for coarse adjustment of the adjusting plate, so that the adjusting plate is quickly close to the filter element to be clamped, the adjusting handle is used for fine adjustment of the adjusting plate, and the adjusting handle is adjusted after the filter element is clamped by the adjusting plate, so that the filter element is tightly clamped by the adjusting handle.
The further technical proposal is that the driving wheel is a manual rotating wheel. Therefore, after the filter element is clamped, the manual rotating wheel needs to be manually rotated in the subsequent testing process.
The other technical scheme is that the driving wheel is fixedly connected with an output shaft of the speed reducer, the speed reducer is connected with the driving motor, and the speed reducer and the driving motor are fixedly connected on the fixing plate. After the filter element is clamped, the subsequent filter element can be automatically rotated by starting the driving motor in the subsequent testing process.
The action process is as follows:
the top end of the filter element, namely one end provided with an end cover and a sealing sheet, faces a circular tube, the bottom end of the filter element faces a screw rod of an adjusting handle, then the screw rod on a connecting plate is adjusted, an adjusting plate is enabled to be rapidly abutted against the bottom end of the filter element and enable the circular tube to be ejected out of the end cover of the filter element (overcoming the elasticity of a spring which is used for ejecting the sealing sheet in the filter element), then the adjusting handle is rotated to enable the filter element to be tightly clamped, then a valve on a gas path and a valve on a liquid path which are led to a liquid storage tank are opened, then an air source is started to enable compressed air to be introduced into the liquid storage tank to enable test liquid in the liquid storage tank to enter an outer tank, the valve on the liquid path and the gas path is closed after the test liquid in the outer tank reaches a certain liquid level, a lifting cylinder is started until, continuously pressurizing until continuous or stable bubbles appear, wherein the displayed pressure is the minimum bubble point pressure < certainly, if a valve on a gas path leading to the cavity inside the filter element is just opened, the continuous bubbles appear to explain that the connection among all the components of the filter element is in a problem, a leak point exists, the test is required to be stopped, the filter element is detached, and the filter element is ensured to be connected firmly and tightly and then tested again >. After the minimum bubbling point pressure is measured, the lifting cylinder is started to enable the outer tank to descend rapidly, and because the valve on the gas path leading to the inner cavity of the filter element is still in an open state, the product can be dried rapidly; then the valve of the liquid path is opened, and the test liquid in the outer groove flows into the liquid storage tank again due to gravity, so that the recovery of the test liquid is realized.
The utility model also provides a technical proposal that the filter element integrity test bed comprises a test bed frame and a test bed base which are fixedly arranged, wherein a lifting cylinder for driving the soaking tank to lift is fixedly arranged on the test bed base; an inner groove of the soaking groove is fixedly arranged on the test bed rack, a plurality of through holes are arranged on the inner groove, an outer groove is arranged below the inner groove, a piston rod of a lifting cylinder is fixedly connected to the bottom surface of the outer groove of the soaking groove, and a liquid storage tank for feeding liquid into the soaking groove is also fixedly arranged on the test bed base; the liquid storage tank is provided with a gas circuit connected with a gas source and at least one liquid circuit connected with the outer groove; the clamping and rotating mechanism of the filter element is arranged in the inner groove, and an air inlet connector communicated with the inner cavity of the filter element is arranged on the clamping and rotating mechanism. This scheme is dedicated to the setting of inner and outer groove double flute, and as to whether retrieve the test solution, retrieve or not all can, and the recovery is the more preferred scheme certainly.
The further technical proposal is that ethanol or propanol is arranged in the liquid storage tank; the air source is a compressed air source, a valve is arranged on the air path, one air path is arranged, and the air path is connected with the cavity in the filter element; the liquid path is provided with one liquid pump and a valve. The scheme adopts a liquid pump to send the test liquid in the liquid storage tank into the outer tank.
The clamping and rotating mechanism comprises two guide rods, the two guide rods are arranged in parallel to form a rectangle, one end of each guide rod is fixedly provided with a fixed plate, the other end of each guide rod is fixedly provided with a connecting plate perpendicular to the guide rods, an adjusting plate is also arranged on the guide rod between the connecting plate and the fixed plate in a sliding manner, a screw hole is formed in the connecting plate, a screw rod is arranged in a manner of being matched with the screw hole, a screw hole is also formed in the adjusting plate, a threaded hole is formed in one side of the adjusting plate, which is located on the screw hole, an adjusting handle with a screw rod is arranged in a manner of being matched with the threaded hole; a pipe of fixed connection on the fixed plate, the pipe passes fixed plate and one end and is linked together with the gas circuit, the other end backs up the end cover of opening the filter core and the gasket of filter core links to each other with the inside cavity of filter core, the fixed first sprocket that sets up on the pipe that is located between fixed plate and the filter core end cover, the rotation axis of first sprocket and the central symmetry axis collineation of pipe, the top that is located first sprocket is equipped with the second sprocket of being connected with the fixed plate rotation, the shaft of second sprocket stretches out the fixed plate and links to each other with the drive wheel is fixed, the meshing is equipped with the chain on first sprocket and.
The utility model has the advantages and the beneficial effects that: the test solution adopts alcohol and propanol, and the filter element can be used after test, so that the waste of the filter element caused by test is reduced; and the test solution can be recovered, thereby avoiding the test solution from volatilizing, polluting the environment and damaging testers. The liquid storage pot not only is to soaking the groove feed liquor, still utilizes the gravity of test solution, through opening the liquid way valve with retrieving used test solution, because the volatile characteristic of ethanol, isopropyl alcohol, so retrieve the liquid storage pot to test solution after the test is accomplished, avoid test solution to volatilize, the polluted environment, harm the tester. The advantage of double flute lies in that after the test is accomplished, the outer tank descends, and the product to be tested can break away from test liquid rapidly, and the leading-in compressed air weathers the product. The tested products can be used continuously, so that the detection of a large number of products is facilitated. The liquid storage pot is less than the soaking groove in height, so the liquid storage pot through letting in compressed air to soaking groove feed liquor after, the valve on liquid way is opened again to the test completion, soak in the test liquid in the inslot because gravity gets back to in the liquid storage pot again, play the effect of retrieving test liquid. Its screw rod of adjustment handle and the tip looks adaptation of filter core, the top of its screw rod of adjustment handle and the bottom looks adaptation of filter core, the round slot mouth that the screw rod inserted the filter core bottom is used for just supporting the bottom of filter core, and the filter core rotates differently when being convenient for follow-up test, sets up the ball in the round slot mouth of filter core bottom. The screw rod on the connecting plate is used for coarse adjustment of the adjusting plate, so that the adjusting plate is quickly close to the filter element to be clamped, the adjusting handle is used for fine adjustment of the adjusting plate, and the adjusting handle is adjusted after the filter element is clamped by the adjusting plate, so that the filter element is tightly clamped by the adjusting handle.
Drawings
FIG. 1 is a schematic view of a filter element integrity test stand of the present invention;
FIG. 2 is a schematic view from another perspective of FIG. 1;
FIG. 3 is an enlarged schematic view of the pinch swing mechanism of FIG. 2;
FIG. 4 is an exploded view of the pinching rotary mechanism of FIG. 1 with the round tube and other components of the pinching rotary mechanism shown partially enlarged from the alternate perspective view;
FIG. 5 is a schematic view of another perspective of FIG. 1;
fig. 6 is a partially enlarged schematic view of fig. 5.
In the figure: 1. a frame; 2. a base; 3. a lifting cylinder; 4. a liquid storage tank; 5. an air inlet interface; 6. an inner tank; 7. a through hole; 8. an outer tank; 9. a guide bar; 10. a fixing plate; 11. connecting plates; 12. an adjusting plate; 13. a screw; 14. an adjusting handle; 15. a circular tube; 16. a first sprocket; 17. a second sprocket; 18. a drive wheel; 19. a chain; 20. and a ball.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 6 (for facilitating the observation of the internal structure, fig. 1 is shown to remove the side plate and the top plate on the frame of the test bed), the utility model relates to a filter element integrity test bed, which comprises a fixed test bed frame 1 and a fixed test bed base 2, wherein the fixed test bed base 2 is provided with a lifting cylinder 3 for driving the immersion tank to lift, and the fixed test bed base 2 is also provided with a liquid storage tank 4 for feeding liquid into the immersion tank and recovering the test liquid in the immersion tank; the liquid storage tank 4 is provided with a gas path connected with a gas source, and the liquid storage tank 4 is also provided with at least one liquid path connected with the soaking tank; a clamping and rotating mechanism of the filter element is arranged in the soaking tank, and an air inlet connector 5 communicated with the cavity in the filter element is arranged on the clamping and rotating mechanism. An inner groove 6 of the soaking groove is fixedly arranged on the test bed frame 1, a plurality of through holes 7 are arranged on the inner groove 6, an outer groove 8 is arranged below the inner groove 6, and a piston rod of the lifting cylinder 3 is fixedly connected to the bottom surface of the outer groove 8 of the soaking groove. The liquid storage tank 4 is internally provided with ethanol or propanol; the air source is a compressed air source, the air path is provided with a valve, at least two air paths are arranged, one air path is connected with the cavity inside the filter element, and the other air path is connected with the upper end of the liquid storage tank 4; the liquid path is provided with one valve. The clamping and rotating mechanism comprises two guide rods 9, the two guide rods 9 are arranged in parallel to form a rectangle, one end of each guide rod 9 is fixedly provided with a fixing plate 10, the other end of each guide rod 9 is fixedly provided with a connecting plate 11 perpendicular to the guide rods 9, an adjusting plate 12 is also arranged on each guide rod 9 between the connecting plate 11 and the fixing plate 10 in a sliding manner, a screw hole is formed in each connecting plate 11, a screw 13 is arranged in a manner of being matched with the screw hole, a screw hole matched with the screw 13 is also formed in each adjusting plate 12, a threaded hole is further formed in one side of each adjusting plate 12, an adjusting handle 14 with a screw is arranged in a manner of being matched with the threaded hole; a pipe 15 of fixed connection on the fixed plate 10, pipe 15 passes fixed plate 10 and one end is linked together with the gas circuit, the other end backs up the end cover of filter core and the gasket of filter core and links to each other with the inside cavity of filter core, the fixed first sprocket 16 that sets up on the pipe 15 that is located between fixed plate 10 and the filter core end cover, the rotation axis of first sprocket 16 and the central symmetry axis collineation of pipe 15, the top that is located first sprocket 16 is equipped with the second sprocket 17 of being connected with fixed plate 10 rotation, the shaft of second sprocket 17 stretches out fixed plate 10 and links to each other with drive wheel 18 is fixed, the meshing is equipped with chain 19 on first sprocket 16 and the second sprocket 17. The ball 20 is arranged in the round notch at the bottom end of the filter element. The drive wheel 18 is a manual wheel.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A filter element integrity test bed is characterized by comprising a test bed frame and a test bed base which are fixedly arranged, wherein a lifting cylinder for driving a soaking tank to lift is fixedly arranged on the test bed base; the liquid storage tank is provided with a gas circuit connected with a gas source and at least one liquid circuit connected with the soaking tank; a clamping and rotating mechanism of the filter element is arranged in the soaking tank, and an air inlet connector communicated with the inner cavity of the filter element is arranged on the clamping and rotating mechanism.
2. The filter element integrity test bed according to claim 1, wherein the test bed frame is fixedly provided with an inner tank of the soaking tank, the inner tank is provided with a plurality of through holes, the outer tank is arranged below the inner tank, and a piston rod of the lifting cylinder is fixedly connected to the bottom surface of the outer tank of the soaking tank.
3. The filter element integrity test rig of claim 2, wherein the reservoir tank contains ethanol or isopropanol; the air source is a compressed air source, the air path is provided with a valve, and at least two air paths are arranged, one air path is connected with the cavity in the filter element, and the other air path is connected with the upper end of the liquid storage tank; the liquid path is provided with one valve.
4. The filter element integrity test bed according to claim 3, wherein the clamping and rotating mechanism comprises two guide rods, the two guide rods are arranged in parallel to form a rectangle, one end of each guide rod is fixedly provided with a fixed plate, the other end of each guide rod is fixedly provided with a connecting plate perpendicular to the guide rod, the guide rod between the connecting plate and the fixed plate is further provided with an adjusting plate in a sliding manner, the connecting plate is provided with a screw hole, a screw rod is arranged in a matching manner with the screw hole, the adjusting plate is also provided with a screw hole in a matching manner with the screw rod, the adjusting plate is further provided with a threaded hole at one side of the screw hole, an adjusting handle with a screw rod is arranged in a matching manner with the; a pipe of fixed connection on the fixed plate, the pipe passes fixed plate and one end and is linked together with the gas circuit, the other end backs up the end cover of opening the filter core and the gasket of filter core links to each other with the inside cavity of filter core, the fixed first sprocket that sets up on the pipe that is located between fixed plate and the filter core end cover, the rotation axis of first sprocket and the central symmetry axis collineation of pipe, the top that is located first sprocket is equipped with the second sprocket of being connected with the fixed plate rotation, the shaft of second sprocket stretches out the fixed plate and links to each other with the drive wheel is fixed, the meshing is equipped with the chain on first sprocket and.
5. The filter cartridge integrity test stand of claim 4, wherein said drive wheel is a manual wheel.
6. The filter element integrity test stand of claim 4, wherein the drive wheel is fixedly connected to an output shaft of a speed reducer, the speed reducer is connected to the drive motor, and the speed reducer and the drive motor are fixedly connected to the fixing plate.
7. A filter element integrity test bed is characterized by comprising a test bed frame and a test bed base which are fixedly arranged, wherein a lifting cylinder for driving a soaking tank to lift is fixedly arranged on the test bed base; an inner groove of the soaking groove is fixedly arranged on the test bed rack, a plurality of through holes are arranged on the inner groove, an outer groove is arranged below the inner groove, a piston rod of a lifting cylinder is fixedly connected to the bottom surface of the outer groove of the soaking groove, and a liquid storage tank for feeding liquid into the soaking groove is also fixedly arranged on the test bed base; the liquid storage tank is provided with a gas circuit connected with a gas source and at least one liquid circuit connected with the outer groove; the clamping and rotating mechanism of the filter element is arranged in the inner groove, and an air inlet connector communicated with the inner cavity of the filter element is arranged on the clamping and rotating mechanism.
8. The filter element integrity test stand of claim 7, wherein the reservoir tank is filled with ethanol or isopropanol; the air source is a compressed air source, a valve is arranged on the air path, one air path is arranged, and the air path is connected with the cavity in the filter element; the liquid path is provided with one liquid pump and a valve.
9. The filter element integrity test bed according to claim 8, wherein the clamping and rotating mechanism comprises two guide rods, the two guide rods are arranged in parallel to form a rectangle, one end of each guide rod is fixedly provided with a fixed plate, the other end of each guide rod is fixedly provided with a connecting plate perpendicular to the guide rod, the guide rod between the connecting plate and the fixed plate is further provided with an adjusting plate in a sliding manner, the connecting plate is provided with a screw hole, a screw rod is arranged in a matching manner with the screw hole, the adjusting plate is also provided with a screw hole in a matching manner with the screw rod, the adjusting plate is further provided with a threaded hole at one side of the screw hole, an adjusting handle with a screw rod is arranged in a matching manner with the; a pipe of fixed connection on the fixed plate, the pipe passes fixed plate and one end and is linked together with the gas circuit, the other end backs up the end cover of opening the filter core and the gasket of filter core links to each other with the inside cavity of filter core, the fixed first sprocket that sets up on the pipe that is located between fixed plate and the filter core end cover, the rotation axis of first sprocket and the central symmetry axis collineation of pipe, the top that is located first sprocket is equipped with the second sprocket of being connected with the fixed plate rotation, the shaft of second sprocket stretches out the fixed plate and links to each other with the drive wheel is fixed, the meshing is equipped with the chain on first sprocket and.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921419336.6U CN210863478U (en) | 2019-08-29 | 2019-08-29 | Filter core integrality test bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921419336.6U CN210863478U (en) | 2019-08-29 | 2019-08-29 | Filter core integrality test bench |
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| Publication Number | Publication Date |
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| CN210863478U true CN210863478U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921419336.6U Active CN210863478U (en) | 2019-08-29 | 2019-08-29 | Filter core integrality test bench |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577873A (en) * | 2020-11-06 | 2021-03-30 | 上海鲁玟科学仪器有限公司 | Filter core bubbling test device |
| CN114061842A (en) * | 2021-11-11 | 2022-02-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Device and method for testing sealing performance of oil filter element |
-
2019
- 2019-08-29 CN CN201921419336.6U patent/CN210863478U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577873A (en) * | 2020-11-06 | 2021-03-30 | 上海鲁玟科学仪器有限公司 | Filter core bubbling test device |
| CN112577873B (en) * | 2020-11-06 | 2023-02-10 | 上海鲁玟科学仪器有限公司 | Filter core bubbling test device |
| CN114061842A (en) * | 2021-11-11 | 2022-02-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Device and method for testing sealing performance of oil filter element |
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