CN110927040A - Suction filter pressure drop testing device and suction filter testing system - Google Patents
Suction filter pressure drop testing device and suction filter testing system Download PDFInfo
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- 238000007789 sealing Methods 0.000 claims description 17
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- 230000013011 mating Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 description 14
- 238000001514 detection method Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
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- 238000001914 filtration Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
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- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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Abstract
The invention discloses a suction filter pressure drop testing device and a suction filter testing system, wherein the suction filter pressure drop testing device comprises a first mounting plate, a second mounting plate and a pressure difference testing assembly, the first mounting plate is provided with a first mounting surface, and a first oil hole penetrates through the first mounting surface; the second mounting plate is arranged on the first mounting surface, a second oil hole penetrates through the end surface of the second mounting plate corresponding to the first mounting plate, an accommodating cavity is formed between the second mounting plate and the first mounting plate, the accommodating cavity is communicated with the first oil hole and the second oil hole, and the accommodating cavity is used for hermetically mounting a suction filter to be tested; the differential pressure testing assembly comprises a differential pressure gauge, wherein one of a high-pressure port and a low-pressure port of the differential pressure gauge is communicated with the first oil hole, and the other is communicated with the second oil hole. Therefore, the pressure drop index is detected, the oil flow passing through the first oil hole is ensured, and the test stability is ensured.
Description
Technical Field
The invention relates to the technical field of test detection, in particular to a suction filter pressure drop testing device and a suction filter testing system.
Background
There is an important item in the performance of the suction filter, namely, the pressure drop characteristic of the suction filter. The pressure drop refers to the pressure drop generated when oil passes through a suction filter product under specific temperature and flow, and if the pressure drop value is too large, the suction of a rear-end oil pump is caused, so that the performance of the oil pump is influenced; however, the smaller the size, the better, a suitable pressure drop index is required in view of other characteristics of the suction filter and economy, and a corresponding test is required to confirm whether the pressure drop characteristic of the suction filter satisfies the design requirements.
The existing suction filter testing device adopts a suction mode to enable oil to pass through the suction filter, the formed vacuum degree is limited due to the influence of standard atmospheric pressure, under the condition, the situation that the oil cannot flow due to insufficient driving force can occur, and the pressure drop characteristic of the suction filter cannot be measured.
Disclosure of Invention
The invention mainly aims to provide a suction filter pressure drop testing device and a suction filter testing system, and aims to solve the problem that oil cannot flow due to the influence of air pressure of the existing testing device.
In order to achieve the above object, the present invention provides a suction filter pressure drop testing device, comprising:
the first mounting plate is provided with a first mounting surface, and a first oil hole penetrates through the first mounting surface;
the second mounting plate is arranged on the first mounting surface, a second oil hole penetrates through the end surface of the second mounting plate corresponding to the first mounting plate, an accommodating cavity is formed between the second mounting plate and the first mounting plate, the accommodating cavity is communicated with the first oil hole and the second oil hole, and the accommodating cavity is used for hermetically mounting a suction filter to be tested; and the number of the first and second groups,
and the differential pressure testing assembly comprises a differential pressure gauge, wherein one of a high pressure port and a low pressure port of the differential pressure gauge is communicated with the first oil hole, and the other one of the high pressure port and the low pressure port is communicated with the second oil hole.
Optionally, the accommodating cavity has a first accommodating cavity section arranged on the first mounting plate and a second accommodating cavity section arranged on the second mounting plate;
wherein the first oil hole is communicated with the first accommodating cavity section, and the second oil hole is communicated with the second accommodating cavity section.
Optionally, the first accommodating cavity section comprises a transition cavity section and an installation cavity section which are sequentially distributed in a direction towards the second installation plate;
the mounting cavity section is used for sealing and mounting the suction filter to be tested.
Optionally, the aperture of the installation cavity section is larger than that of the transition cavity section, so that a step surface is formed between the installation cavity section and the transition cavity section, and a first annular sealing ring is arranged on the step surface and used for sealing a matching surface between the suction filter to be tested and the first installation plate.
Optionally, a first through hole communicated with the first oil hole is arranged on the upper end surface of the first mounting plate in a penetrating manner;
a second through hole communicated with the second oil hole is formed in the upper end face of the second mounting plate in a penetrating manner;
the differential pressure test assembly further comprises two connecting pipes, wherein one of the two ends of the connecting pipe is used for being communicated with the high-pressure port of the differential pressure gauge and the first via hole, and the other end of the connecting pipe is used for being communicated with the low-pressure port of the differential pressure gauge and the second via hole.
Optionally, the first mounting plate has a second mounting surface opposite the first mounting surface;
an oil passing channel is formed in the first mounting plate, an opening at one end of the oil passing channel is formed in the second mounting surface, and an opening at the other end of the oil passing channel is formed in the lower end surface of the first mounting plate;
the pressure drop test tool further comprises an oil return pipe, one end of the oil return pipe is communicated with the second oil hole, and the other end of the oil return pipe is communicated with an opening of the lower end face of the first mounting plate, wherein the oil passing channel is located on the first mounting plate.
Optionally, the first mounting plate is provided with a plurality of threaded holes along the circumferential direction of the accommodating cavity, and the second mounting plate is provided with a plurality of through holes corresponding to the plurality of threaded holes;
the pressure drop test tool further comprises a plurality of fastening bolts, and the fastening bolts penetrate through the through holes and are in threaded connection with the threaded holes so as to fix the first mounting plate and the second mounting plate.
Optionally, a second annular sealing ring is arranged between the first mounting plate and the second mounting plate and used for sealing a matching surface between the first mounting plate and the second mounting plate.
The invention also provides a suction filter test system, which is characterized by comprising the suction filter pressure drop test device, wherein the suction filter pressure drop test device comprises:
the first mounting plate is provided with a first mounting surface, and a first oil hole penetrates through the first mounting surface;
the second mounting plate is arranged on the first mounting surface, a second oil hole penetrates through the end surface of the second mounting plate corresponding to the first mounting plate, an accommodating cavity is formed between the second mounting plate and the first mounting plate, the accommodating cavity is communicated with the first oil hole and the second oil hole, and the accommodating cavity is used for hermetically mounting a suction filter to be tested; and the number of the first and second groups,
and the differential pressure testing assembly comprises a differential pressure gauge, wherein one of a high pressure port and a low pressure port of the differential pressure gauge is communicated with the first oil hole, and the other one of the high pressure port and the low pressure port is communicated with the second oil hole.
Optionally, the suction filter test system further comprises:
an oil tank;
one end of the main oil supply pipeline is communicated with the inner cavity of the oil tank, and the other end of the main oil supply pipeline is communicated with the first oil hole of the suction filter pressure drop testing device;
the oil pump is arranged on the main oil supply pipeline; and the number of the first and second groups,
and one end of the main oil return pipeline is communicated with the inner cavity of the oil tank, and the other end of the main oil return pipeline is communicated with an opening of the oil passage, which is arranged on the second mounting surface.
In the technical scheme provided by the invention, a containing cavity is formed between the second mounting plate and the first mounting plate, oil enters from the first oil hole, the pressure of the oil is reduced after the oil passes through a suction filter to be tested, a high pressure port and a low pressure port of the differential pressure gauge are respectively communicated with the first oil hole and the second oil hole, the oil is converged into the differential pressure gauge through the high pressure port and the low pressure port, two sides of a metal diaphragm of the differential pressure gauge are subjected to pressures with different sizes to generate deformation, a signal acquisition system of the differential pressure gauge collects electric signals to obtain a pressure difference value of the suction filter to be tested, so that the detection of the pressure drop index of the suction filter to be tested is realized, the arrangement is not influenced by standard atmospheric pressure, the flow rate of the oil passing through the first oil hole is ensured, and the stability of the test is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic perspective view of an embodiment of a pressure drop testing apparatus for a suction filter according to the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1;
FIG. 3 is an enlarged schematic view of detail A of FIG. 2;
FIG. 4 is a perspective view of the first mounting plate of FIG. 1 at an angle;
FIG. 5 is a perspective view of the first mounting plate of FIG. 1 at another angle;
fig. 6 is a perspective view of the second mounting plate of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Suction filter pressure drop testing device | 21 | The |
| 1 | |
22 | Second via hole |
| 1a | |
3 | Differential |
| 1b | |
31 | |
| 11 | |
32 | Connecting |
| 12 | |
4 | Oil return pipe |
| 13 | A first via |
5 | Second ring-shaped |
| 14 | Oil passing channel | a | First |
| 2 | Second mounting plate | b | Second accommodation cavity section |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The pressure drop characteristic of the suction filter is used as an important index for evaluating suction filter products, and needs to be matched with components such as an oil pump and the like so as to meet the overall design requirement. The pressure drop testing device in the suction mode promotes oil to pass through the suction filter by means of pressure, the formed vacuum degree is limited, the formed vacuum degree cannot exceed 1 standard atmospheric pressure to the maximum extent, the flow meter has large pressure drop, and in addition, the pressure drop of a system pipeline and the suction filter is reduced, under the condition, the situation that the oil cannot flow due to insufficient driving force can occur.
In view of this, the invention provides a suction filter pressure drop testing device and a suction filter testing system, so that the testing device can stably measure the pressure drop value of a suction filter to be tested. Fig. 1 to 6 show an embodiment of a suction filter pressure drop testing device according to the present invention.
Referring to fig. 1 to 2, the present invention provides a suction filter pressure drop testing apparatus 100, including a first mounting plate 1, a second mounting plate 2 and a differential pressure testing assembly 3, wherein the first mounting plate 1 has a first mounting surface 1a, and a first oil hole 11 penetrates through the first mounting surface 1 a; the second mounting plate 2 is arranged on the first mounting surface 1a, a second oil hole 21 is arranged on the end surface of the second mounting plate 2 corresponding to the first mounting plate 1 in a penetrating manner, an accommodating cavity is formed between the second mounting plate 2 and the first mounting plate 1, the accommodating cavity is communicated with the first oil hole 11 and the second oil hole 21, and the accommodating cavity is used for hermetically mounting a suction filter to be tested; the differential pressure test assembly 3 comprises a differential pressure gauge 31, and one of a high pressure port and a low pressure port of the differential pressure gauge 31 is communicated with the first oil hole 11, and the other is communicated with the second oil hole 21.
In the technical scheme provided by the invention, a containing cavity is formed between the second mounting plate 2 and the first mounting plate 1, oil enters from the first oil hole 11, the pressure of the oil is reduced after the oil passes through a suction filter to be tested, a high pressure port and a low pressure port of the differential pressure gauge 31 are respectively communicated with the first oil hole 11 and the second oil hole 21, the oil is converged into the differential pressure gauge 31 through the high pressure port and the low pressure port, two sides of a metal diaphragm of the differential pressure gauge 31 are subjected to pressures with different sizes to generate deformation, a signal acquisition system of the differential pressure gauge 31 collects electric signals to obtain a pressure difference value of the suction filter to be tested, so that the detection of the pressure drop index of the suction filter to be tested is realized, the arrangement is not influenced by standard atmospheric pressure, the flow rate of the oil passing through the first oil hole 11 is ensured, and the stability of the test is ensured.
The accommodating cavity may be separately disposed on the first mounting plate 1 or on the second mounting plate 2, and in this embodiment, referring to fig. 3, the accommodating cavity has a first accommodating cavity section a disposed on the first mounting plate 1 and a second accommodating cavity section b disposed on the second mounting plate 2; wherein the first oil hole 11 communicates with the first receiving cavity section a, and the second oil hole 21 communicates with the second receiving cavity section b. The oil liquid by first oilhole 11 flows into in the first chamber section a that holds, through the examination to await measuring suction strainer gets into in the second holds chamber section b, again by the second oilhole 21 flows out, so set up will await measuring the oil liquid of suction strainer both sides separately, be convenient for right hold the machining in chamber, also make the oil liquid differentiation before and after filtering more obvious.
The installation position of the suction filter to be detected is not limited in the present invention, and the suction filter to be detected may be installed between the first installation plate 1 and the second installation plate 2, or may be installed on one of the first installation plate 1 or the second installation plate 2, specifically, in this embodiment, referring to fig. 4, the first accommodating cavity section a includes a transition cavity section and an installation cavity section that are sequentially distributed in a direction toward the second installation plate 21; the mounting cavity section is used for sealing and mounting the suction filter to be tested. So set up and save space, be convenient for wait to detect the installation of inhaling the filter and fix.
In order to ensure the sealing installation between the suction filter to be tested and the first mounting plate 1, please refer to fig. 3, the aperture of the mounting cavity section is larger than that of the transition cavity section, so as to form a step surface between the mounting cavity section and the transition cavity section, and the step surface is provided with a first annular sealing ring 12 for sealing the matching surface between the suction filter to be tested and the first mounting plate 1. Through setting up first ring type seal 12, make wait to detect the suction filter with form end face seal between the first mounting panel 1, prevent that fluid from waiting to detect the suction filter with gap department flows between the first mounting panel 1, and the influence waits to detect the pressure value of suction filter both sides, has guaranteed the accuracy of pressure drop numerical value.
In the present invention, a pressure drop value is obtained by the differential pressure gauge 31, a high pressure port and a low pressure port of the differential pressure gauge 31 can be directly connected to an oil pipe communicating with the first oil hole 11 and the second oil hole 21, and further, in order to make the space of the suction strainer pressure drop testing apparatus 100 reasonably arranged, in this embodiment, referring to fig. 4 to 6, a first through hole 13 communicating with the first oil hole 11 is penetrated through an upper end surface of the first mounting plate 1; a second through hole 22 communicated with the second oil hole 21 is arranged on the upper end surface of the second mounting plate 2 in a penetrating manner; the differential pressure testing assembly 3 further comprises two connecting pipes 32, wherein one of the two ends of the connecting pipe 32 is used for communicating the high-pressure port of the differential pressure gauge 31 with the first via hole 13, and the other of the two ends of the connecting pipe 32 is used for communicating the low-pressure port of the differential pressure gauge 31 with the second via hole 22. Therefore, the connecting pipe 32 is directly connected to the first mounting plate 1 and the second mounting plate 2, the winding caused by overlong pipelines is prevented, the space is saved, and the measured pressure drop value is more accurate.
After the oil flows out through the second oil hole 21, the detection of the next round is finished, and the oil needs to be collected after flowing out, which is easy to cause the waste of the oil, therefore, in the technical scheme of the invention, the first mounting plate 1 is provided with a second mounting surface 1b opposite to the first mounting surface 1 a; an oil passing channel 14 is formed in the first mounting plate 1, an opening at one end of the oil passing channel 14 is formed in the second mounting surface 1b, and an opening at the other end of the oil passing channel 14 is formed in the lower end surface of the first mounting plate 1; the pressure drop test tool 100 further comprises an oil return pipe 4, one end of the oil return pipe 4 is communicated with the second oil hole 21, and the other end of the oil return pipe 4 is communicated with an opening of the lower end face of the first mounting plate 1, wherein the oil passage 14 is located in the opening. After flowing out from the second oil hole 21, oil enters the oil passing channel 14 through the oil return pipe 4 and finally flows back to the original oil storage tank, so that oil circulation is formed, waste of test oil is reduced, the step of oil collection is reduced, operation is simple, and repeated tests are facilitated. One end of the oil passing channel 14 is arranged at the same side as the first oil hole 11, so that space is reasonably utilized, and pipelines are arranged more neatly.
Further, in order to fix the first mounting plate 1 and the second mounting plate 2, in this embodiment, a plurality of threaded holes are formed in the first mounting plate 1 along the circumferential direction of the accommodating cavity, and a plurality of through holes corresponding to the plurality of threaded holes are formed in the second mounting plate 2; the pressure drop test tool 100 further comprises a plurality of fastening bolts, and the fastening bolts penetrate through the through holes and are in threaded connection with the threaded holes so as to fix the first mounting plate 1 and the second mounting plate 2. The thread fixing mode is convenient to install and disassemble and easy to realize. The fixing mode of the bolt and the nut can be combined, and the detailed description is omitted.
In order to ensure the sealing between the first mounting plate 1 and the second mounting plate 2, in this embodiment, a second annular sealing ring 5 is disposed between the first mounting plate 1 and the second mounting plate 2 to seal a matching surface between the first mounting plate 1 and the second mounting plate 2. Prevent that fluid from following first mounting panel 1 with gap between the second mounting panel 2 flows out, causes the leakage of pressure, has guaranteed the reliability of test result.
The present invention further provides a suction filter testing system, which includes the suction filter pressure drop testing apparatus 100, and the suction filter testing system includes all technical features of the suction filter pressure drop testing apparatus 100, so that the suction filter testing system also has technical effects brought by all the technical features, and details are not repeated herein.
Further, the suction filter test system further comprises an oil tank, a main oil supply pipeline, an oil pump and a main oil return pipeline, wherein one end of the main oil supply pipeline is communicated with an inner cavity of the oil tank, and the other end of the main oil supply pipeline is communicated with the first oil hole 11 of the suction filter pressure drop test device 100; the oil pump is arranged on the main oil supply pipeline; one end of the main oil return pipeline is communicated with an inner cavity of the oil tank, and the other end of the main oil return pipeline is communicated with an opening of the oil passing channel 14 arranged on the second mounting surface 1 b. And a complete circulating system is formed, so that the stability and the repeatability of the test are facilitated.
In order to facilitate the control of the temperature and the flow in the test process, a heater, a plurality of flowmeters and a plurality of pressure sensors which are distributed on the main oil supply pipeline and the main oil return pipeline are also arranged in the suction filter test system.
Specifically, each test element is connected, a suction filter to be tested is not installed during initial test, the temperature and the flow rate are controlled according to set working conditions, and the pressure drop p0 under each working condition is recorded through the differential pressure gauge 31; installing a suction filter to be tested, testing again under the working conditions of the same temperature and flow rate, and recording the pressure drop p1 obtained by the differential pressure gauge 31 under each working condition; thus, the actual pressure drop of the suction filter to be tested is: p 1-p 0. Through the mode of subtracting two times of tests, the influence of the suction filter pressure drop testing device 100 and the testing pipeline on the testing result is eliminated, the system error is small, and the result is more accurate.
In addition, in consideration of preparation of oil with specified pollutant concentration, oil collecting channels can be respectively led out from the first mounting plate 1 and the second mounting plate 2 and used for collecting oil on the upstream and downstream of the suction filter, the size and distribution of pollutant particles can be obtained by measuring the cleanliness of the oil, and the filtering efficiency of the suction filter for the pollutant particles with different sizes can be calculated.
In order to strengthen the universality of the suction filter pressure drop testing device 100, the suction filters with different overall dimensions are adapted, a transition tool plate can be added between the first mounting plate 1 and the second mounting plate 2, and the transition tool plate is matched with the suction filters with different dimensions, so that the pressure drop test of the suction filters with different overall dimensions is realized.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A suction filter pressure drop test device, comprising:
the first mounting plate is provided with a first mounting surface, and a first oil hole penetrates through the first mounting surface;
the second mounting plate is arranged on the first mounting surface, a second oil hole penetrates through the end surface of the second mounting plate corresponding to the first mounting plate, an accommodating cavity is formed between the second mounting plate and the first mounting plate, the accommodating cavity is communicated with the first oil hole and the second oil hole, and the accommodating cavity is used for hermetically mounting a suction filter to be tested; and the number of the first and second groups,
and the differential pressure testing assembly comprises a differential pressure gauge, wherein one of a high pressure port and a low pressure port of the differential pressure gauge is communicated with the first oil hole, and the other one of the high pressure port and the low pressure port is communicated with the second oil hole.
2. The suction filter pressure drop testing device of claim 1, wherein the receiving chamber has a first receiving chamber section disposed on the first mounting plate and a second receiving chamber section disposed on the second mounting plate;
wherein the first oil hole is communicated with the first accommodating cavity section, and the second oil hole is communicated with the second accommodating cavity section.
3. The suction filter pressure drop testing device of claim 2, wherein the first receiving cavity section comprises a transition cavity section and a mounting cavity section sequentially distributed in a direction toward the second mounting plate;
the mounting cavity section is used for sealing and mounting the suction filter to be tested.
4. The suction filter pressure drop testing device of claim 3, wherein the aperture of the mounting cavity section is larger than that of the transition cavity section, so as to form a step surface between the mounting cavity section and the transition cavity section, and the step surface is provided with a first annular sealing ring for sealing a matching surface between the suction filter to be tested and the first mounting plate.
5. The suction strainer pressure drop testing device according to claim 2, wherein a first through hole communicating with the first oil hole is formed through an upper end surface of the first mounting plate;
a second through hole communicated with the second oil hole is formed in the upper end face of the second mounting plate in a penetrating manner;
the differential pressure test assembly further comprises two connecting pipes, wherein one of the two ends of the connecting pipe is used for being communicated with the high-pressure port of the differential pressure gauge and the first via hole, and the other end of the connecting pipe is used for being communicated with the low-pressure port of the differential pressure gauge and the second via hole.
6. The suction filter pressure drop testing device of claim 1, wherein the first mounting plate has a second mounting surface opposite the first mounting surface;
an oil passing channel is formed in the first mounting plate, an opening at one end of the oil passing channel is formed in the second mounting surface, and an opening at the other end of the oil passing channel is formed in the lower end surface of the first mounting plate;
the pressure drop test tool further comprises an oil return pipe, one end of the oil return pipe is communicated with the second oil hole, and the other end of the oil return pipe is communicated with an opening of the lower end face of the first mounting plate, wherein the oil passing channel is located on the first mounting plate.
7. The suction filter pressure drop testing device of claim 1, wherein the first mounting plate is provided with a plurality of threaded holes extending circumferentially along the accommodating cavity, and the second mounting plate is provided with a plurality of through holes corresponding to the plurality of threaded holes;
the pressure drop test tool further comprises a plurality of fastening bolts, and the fastening bolts penetrate through the through holes and are in threaded connection with the threaded holes so as to fix the first mounting plate and the second mounting plate.
8. The suction filter pressure drop testing device of claim 7, wherein a second annular sealing ring is disposed between the first mounting plate and the second mounting plate for sealing the mating surface between the first mounting plate and the second mounting plate.
9. A suction filter test system comprising a suction filter pressure drop test device according to any one of claims 1 to 8.
10. The suction filter test system of claim 9, further comprising:
an oil tank;
one end of the main oil supply pipeline is communicated with the inner cavity of the oil tank, and the other end of the main oil supply pipeline is communicated with the first oil hole of the suction filter pressure drop testing device;
the oil pump is arranged on the main oil supply pipeline; and the number of the first and second groups,
and one end of the main oil return pipeline is communicated with the inner cavity of the oil tank, and the other end of the main oil return pipeline is communicated with an opening of the oil passage, which is arranged on the second mounting surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210584.4A CN110927040B (en) | 2019-11-29 | 2019-11-29 | Suction filter pressure drop testing device and suction filter testing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210584.4A CN110927040B (en) | 2019-11-29 | 2019-11-29 | Suction filter pressure drop testing device and suction filter testing system |
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| Publication Number | Publication Date |
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| CN110927040A true CN110927040A (en) | 2020-03-27 |
| CN110927040B CN110927040B (en) | 2021-04-02 |
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| CN110927040B (en) | 2021-04-02 |
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Effective date of registration: 20221019 Address after: 237000 Gao Cheng East Road, Lu'an Economic Development Zone, Anhui Patentee after: ANHUI XINGRUI GEAR-TRANSMISSION Co.,Ltd. Address before: No.99, Ziyun Road, economic and Technological Development Zone, Hefei City, Anhui Province Patentee before: ANHUI JIANGHUAI AUTOMOBILE GROUP Corp.,Ltd. |