Flow cell structure for measuring abrasive particles of lubricating oil

Abstract

The invention discloses a flow cell structure for measuring abrasive particles of lubricating oil, which relates to the technical field of lubricating oil and comprises a measuring main body, two pipelines, a measuring instrument and a light-emitting instrument, a cavity is formed in the measuring main body; circulation openings are formed in the two sides of the measuring main body; the pipelines are communicated with the cavity through the corresponding circulation openings, and the inner walls of the pipelines are flush with the opening walls of the circulation openings; a first mounting opening and a second mounting opening are respectively formed in two sides of the measuring main body along the height direction of the measuring main body; the measuring instrument seals the first mounting port and is partially located in the cavity; the light-emitting instrument seals the second installation opening, and the surface of the part, located in the second installation opening, of the light-emitting instrument is flush with the inner wall of the cavity. Dead corners in the structure can be effectively eliminated, the smoothness degree of abrasive particles flowing along with lubricating oil is improved, the accuracy of a measurement result is guaranteed, and meanwhile the influence of the abrasive particles on the structure can be relieved.

Description

Technical Field

[0001] The present application relates to the technical field of lubricating oil, and in particular to a circulation pool structure for measuring lubricating oil abrasive particles. Background Art

[0002] Lubricating oil is a liquid or semi-solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts. It has a wide range of applications in the fields of automobiles, mechanical equipment, etc.

[0003] At present, lubricating oil is generally used in a cyclic way to continuously lubricate the equipment. During the process of lubricating oil on the equipment, the abrasive particles generated by the equipment's operation will flow away with the lubricating oil. Usually, a filtering structure is set to filter the abrasive particles in the lubricating oil to reduce the impact of subsequent abrasive particles flowing with the lubricating oil on the operation of the equipment.

[0004] However, after the abrasive particles in the lubricating oil are filtered, some fine abrasive particles still exist in the lubricating oil. If the number of fine abrasive particles is large, the lubricating effect of the lubricating oil on the equipment will also be affected. For this reason, it is usually necessary to set a structure for measuring the abrasive content in the lubricating oil after the filtering structure, so that the user can know the quality of the lubricating oil in time, so as to better select and use the lubricating oil, and provide guarantee for the normal operation and extended service life of the equipment.

[0005] However, the existing structure for measuring the abrasive content in lubricating oil is prone to dead corners, that is, the abrasive particles that enter the structure with the lubricating oil are prone to stay in the gaps or corners inside the structure, resulting in the accuracy of the measurement results being affected. After long-term use, it may even become clogged, affecting the recycling of the lubricating oil. Summary of the invention

[0006] The present application provides a flow cell structure for measuring lubricating oil abrasive particles, which can effectively eliminate dead angles inside the structure, improve the smoothness of the abrasive particles flowing with the lubricating oil, ensure the accuracy of the measurement results, and at the same time reduce the impact of the abrasive particles on the structure.

[0007] The present application provides a flow cell structure for measuring lubricating oil wear particles, which adopts the following technical solution: A flow cell structure for measuring lubricating oil wear particles, comprising a measuring body, two pipes, a measuring instrument and a light emitting instrument; The measuring body is a rectangular parallelepiped structure as a whole, with a cylindrical cavity in the center thereof, and the axis of the cavity is parallel to the height direction of the measuring body; both sides of the measuring body are provided with flow openings in a direction perpendicular to the corresponding side faces, and the two flow openings are aligned along the same radial direction of the cavity; The two pipes are respectively arranged on both sides of the measuring body, the pipes are connected with the cavity through the corresponding flow openings, and the inner wall of the pipe is flush with the wall of the flow opening; The measuring body is provided with a first mounting opening and a second mounting opening in the center of two side surfaces along its height direction, the first mounting opening is located above the second mounting opening, and both the first mounting opening and the second mounting opening are communicated with the cavity; The measuring instrument is arranged on the measuring body through the first mounting opening, the first mounting opening is sealed, and a part of the measuring instrument is located in the cavity; The light emitting instrument is arranged on the measuring body through the second mounting opening, the second mounting opening is sealed, and the surface of the portion located in the second mounting opening is flush with the inner wall of the cavity.

[0008] By adopting the above technical scheme, the lubricating oil entering the cavity through the pipeline will mainly pass between the measuring instrument and the light-emitting instrument, which is convenient for measuring the abrasive content in the lubricating oil and can effectively improve the accuracy of the measurement results; in addition, in the process of the lubricating oil entering the flow port from the pipeline and flowing through the cavity, it can smoothly pass through the gap between the pipeline and the measuring body and the gap between the light-emitting instrument and the measuring body, effectively reducing the probability of the abrasive particles being blocked and staying, reducing the influence of the abrasive particles on the structure, and at the same time effectively ensuring the accuracy of the measurement results.

[0009] Optionally, the flow opening is a square-circular hole formed by superimposing a square area and a circular area; The length direction of the square area is parallel to the height direction of the measuring body, the length dimension of the square area is equal to the outer diameter dimension of the pipe, the width dimension of the square area is equal to the dimension of the part of the measuring instrument located in the cavity, and the radial dimension of the circular area is equal to the inner diameter dimension of the pipe.

[0010] By adopting the above technical solution, the flow area of ​​the lubricating oil entering the cavity through the flow port can be matched with the measuring area of ​​the measuring instrument, thereby further improving the accuracy of the measurement result.

[0011] Optionally, the circular area is expanded along its own axial direction toward the direction close to the cavity, and the minimum radial dimension of the circular area is equal to the inner diameter of the pipe.

[0012] By adopting the above technical solution, the process of lubricating oil entering the cavity through the flow port can be made smoother, thereby further reducing the probability of abrasive particles staying in the cavity due to obstruction, and effectively eliminating internal dead corners.

[0013] Optionally, two transition grooves adapted to the square area are opened at one end of the pipe close to the flow port, the length of the transition groove is equal to the width of the square area, and the transition groove is adapted to and communicated with the portion of the square area that exceeds the circular area.

[0014] By adopting the above technical solution, the process of lubricating oil entering the cavity through the square area can be made smoother, and the probability of abrasive particles staying due to a dead angle formed between the pipeline and the square area of ​​the measuring body can be reduced.

[0015] Optionally, an arc-shaped first transition surface is provided between an inner wall of the cavity in a radial direction and an inner wall of the cavity at one end close to the second mounting opening.

[0016] By adopting the above technical solution, the lubricating oil entering the cavity can be easily passed between the measuring instrument and the light-emitting instrument, and at the same time, the probability of abrasive particles staying in the corners at the bottom of the cavity can be effectively reduced, thereby further eliminating dead corners.

[0017] Optionally, the measuring body has a second transition surface on the inner wall of the square area near the second mounting port, and the pipe has a third transition surface on the groove wall of the transition groove; the two ends of the second transition surface are respectively connected to one end of the first transition surface and one end of the third transition surface, and the other end of the third transition surface is connected to the inner wall of the pipe.

[0018] By adopting the above technical solution, the process of lubricating oil entering the bottom of the cavity from the pipeline through the flow port can be made smoother, and at the same time, the probability of abrasive particles staying at the corners between different structures during the above process can be further reduced, thereby further eliminating dead corners.

[0019] Optionally, two observation windows are also included; the measuring body is provided with observation ports on both sides thereof perpendicular to the direction in which the flow port is opened, both observation ports are communicated with the cavity, the observation windows are installed in the corresponding observation ports, and the surface of the observation windows close to the cavity is flush with the inner wall of the cavity.

[0020] By adopting the above technical scheme, it is convenient for the staff to observe the situation in the cavity, so that they can timely know the residence situation of the abrasive particles in the cavity and the working situation of the light-emitting instrument, which is convenient for timely adjustment of the equipment; in addition, it can effectively reduce the probability of the abrasive particles being blocked and staying near the observation port in the cavity, thereby further eliminating blind spots.

[0021] Optionally, the observation port is located on the measurement body near the second mounting port.

[0022] By adopting the above technical solution, it is convenient for workers to intuitively observe the flow of lubricating oil through the space between the measuring instrument and the light-emitting instrument.

[0023] Optionally, an inner wall of one side of the observation port close to the second mounting port is flush with an inner wall of one end of the cavity close to the second mounting port.

[0024] By adopting the above technical solution, it is further convenient for the staff to intuitively observe the flow of lubricating oil through the space between the measuring instrument and the light-emitting instrument.

[0025] Optionally, the length dimension of the observation port is equal to the dimension of the portion of the measuring instrument located in the cavity, and the width dimension of the observation port is equal to the distance between the measuring instrument and the light emitting instrument.

[0026] By adopting the above technical solution, it is further convenient for the staff to intuitively observe the flow of lubricating oil through the space between the measuring instrument and the light-emitting instrument.

[0027] In summary, the present application includes at least one of the following beneficial effects: 1. It can effectively eliminate the dead angle inside the structure, thereby effectively reducing the probability of abrasive particles being blocked and staying inside the structure; 2. It can effectively improve the smoothness of the flow of abrasive particles with the lubricating oil, thereby further effectively reducing the probability of abrasive particles being blocked and staying inside the structure; 3. It can effectively ensure the accuracy of the measurement results and reduce the impact of abrasive particles on the structure; 4. It is convenient for the staff to observe the abrasive content in the lubricating oil and the operation of the detection device in time, so as to make timely adjustments according to the situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a flow cell structure for measuring lubricating oil wear particles according to an embodiment of the present application; Figure 2 is a longitudinal cross-sectional view of a flow cell structure for measuring lubricating oil wear particles according to an embodiment of the present application; Figure 3 is a transverse cross-sectional view of a flow cell structure for measuring lubricating oil wear particles according to an embodiment of the present application; Figure 4 is an exploded view of a flow cell structure for measuring lubricating oil wear particles according to an embodiment of the present application; Figure 5 It is a schematic diagram of the half-section structure of the pipeline after the measurement body is installed in the embodiment of the present application.

[0029] Explanation of the reference numerals: 1. Measuring body; 11. Cavity; 12. Flow port; 121. Square area; 122. Circular area; 13. First mounting port; 14. Second mounting port; 15. Observation port; 16. First transition surface; 17. Second transition surface; 2. Pipeline; 21. Transition groove; 22. Third transition surface; 3. Measuring instrument; 4. Light-emitting instrument; 5. Observation window. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] The embodiment of the present application discloses a circulation pool structure for measuring lubricating oil abrasive particles, through which the lubricating oil flows after lubricating the equipment, and the abrasive content therein is measured in real time to determine whether the quality of the lubricating oil can meet the lubrication requirements of the equipment, so that the staff can replace the lubricating oil in time, reduce the impact of the abrasive particles on the operation of the equipment to be lubricated, and extend the service life of the equipment to be lubricated.

[0032] Reference Figure 1 and Figure 2 The circulation pool structure includes a measuring body 1, two pipes 2, a measuring instrument 3, a light-emitting instrument 4 and two observation windows 5. The inside of the measuring body 1 is used for lubricating oil to circulate, providing a place for measuring the abrasive content in the lubricating oil; the two pipes 2 are used to supply lubricating oil to and from the measuring body 1; the measuring instrument 3 is used to measure the abrasive content of the lubricating oil flowing through the inside of the measuring body 1; the light-emitting instrument 4 is used to provide lighting inside the measuring body 1, which is convenient for the measuring instrument 3 to measure the abrasive content; the observation window 5 is used for the staff to observe the abrasive retention situation inside the measuring body 1 and the operation of the light-emitting instrument 4, so that the staff can clean the inside of the measuring body 1 in time when the number of abrasive retention inside the measuring body 1 is large, and can repair and replace the light-emitting instrument 4 in time when the light-emitting instrument 4 fails to operate.

[0033] Reference Figure 2 and Figure 3 The measuring body 1 is a rectangular parallelepiped structure with a square cross section, and the measuring body 1 is installed in a position state where the square cross section is a horizontal plane. A cylindrical cavity 11 is provided inside the measuring body 1, and the axis of the cavity 11 is parallel to the height direction of the measuring body 1, and the axis of the cavity 11 coincides with the vertical center line of the measuring body 1.

[0034] Reference Figure 2 and Figure 4, both sides of the measuring body 1 in the horizontal direction are provided with flow ports 12 for the lubricating oil to enter and exit, the flow ports 12 are communicated with the cavity 11 and penetrate the surface of the measuring body 1, and the two pipes 2 are respectively installed on both sides of the measuring body 1 in the horizontal direction; the pipes 2 are generally hollow cylindrical structures, the two pipes 2 correspond to the two flow ports 12 one by one, one end of the pipe 2 in the axial direction is fixedly connected to the measuring body 1 through the flow port 12, and the lubricating oil can flow into and out of the cavity 11 through the two pipes 2.

[0035] After the two pipes 2 are fixedly installed on the measuring body 1, the axes of the two pipes 2 coincide, the axes of the pipes 2 are perpendicular to the adjacent surfaces on the measuring body 1, and the axes of the pipes 2 intersect with the axis of the cavity 11. In this embodiment, it is preferred that the pipes 2 and the measuring body 1 are fixedly connected by welding, and both are demagnetized as a whole after being fixedly connected, and the inner walls of the pipes 2 and the inner walls of the measuring body 1 are smooth to reduce the probability of abrasive adsorption; and it is preferred that the surface of the measuring body 1 has a sink groove for the pipe 2 to be plugged and matched with the measuring body 1 and a clearance groove for the convenience of welding operation by the staff at the outer edge of the flow port 12; since the designs of the above-mentioned sink groove and the clearance groove are common existing technologies, they will not be described in detail here.

[0036] Reference Figure 2 and Figure 5 The measuring body 1 has a first mounting opening 13 and a second mounting opening 14 at both ends along its height direction, the first mounting opening 13 is located above the second mounting opening 14, and both the first mounting opening 13 and the second mounting opening 14 are in communication with the cavity 11. The first mounting opening 13 and the second mounting opening 14 are both circular openings as a whole, and the axis of the first mounting opening 13 coincides with the axis of the second mounting opening 14, and also coincides with the axis of the cavity 11.

[0037] The first mounting opening 13 is used for the measuring instrument 3 to be mounted and fixed on the measuring body 1. After the measuring instrument 3 is mounted and fixed on the measuring body 1, the measuring instrument 3 will be partially located on the top of the measuring body 1 and partially located in the cavity 11, and the measuring instrument 3 will seal the first mounting opening 13. In this embodiment, the measuring instrument 3 is preferably an industrial camera that can take pictures in a vertical downward direction, and the portion located in the cavity 11 is a cylindrical structure as a whole, and the axis of the portion coincides with the axis of the cavity 11; since the industrial camera is a common prior art, it will not be described in detail here, and it is only briefly shown in the drawings.

[0038] The second mounting opening 14 is used for the light emitting instrument 4 to be mounted and fixed on the measuring body 1. After the light emitting instrument 4 is mounted and fixed on the measuring body 1, the light emitting instrument 4 will partially fill the second mounting opening 14 and seal the second mounting opening 14, and at the same time partially be located at the bottom of the measuring body 1. In this embodiment, the light emitting instrument 4 is preferably a planar light source, and the surface of the part of the light emitting instrument 4 located in the second mounting opening 14 close to the cavity 11 is flush with the inner wall of the cavity 11 close to the second mounting opening 14, and the light emitting area thereof is circular and the illumination coverage range is not less than the shooting range of the measuring instrument 3 in the cavity 11; since the planar light source is a common prior art, it will not be described in detail here, and it is only briefly indicated in the drawings.

[0039] The space formed between the part of the measuring instrument 3 located in the cavity 11 and the light-emitting instrument 4 is the measuring area. When the lubricating oil flows through the cavity 11 through the pipeline 2, the measuring instrument 3 can measure the abrasive content in the lubricating oil flowing through the space between it and the light-emitting instrument 4 in real time.

[0040] Reference Figure 1 and Figure 5 , observation ports 15 are provided on the other two sides of the measuring body 1 in the horizontal direction for the staff to directly observe the situation in the cavity 11. The shape of the observation port 15 is approximately a waist-shaped hole. The width direction of the observation port 15 is parallel to the height direction of the measuring body 1, and its length direction is parallel to the adjacent side length of the square cross-section of the measuring body 1.

[0041] The two observation ports 15 are aligned along a direction perpendicular to the plane where the measurement body 1 is located, and the position of the observation ports 15 on the plane where the measurement body 1 is located is centered along the direction of the side length adjacent to the square cross section of the measurement body 1 .

[0042] Reference Figure 2 and Figure 5 Furthermore, it is preferred that the wall of the observation port 15 on the side close to the second installation port 14 is flush with the inner wall of the cavity 11 on the side close to the second installation port 14 .

[0043] At this time, the staff can visually observe the flow of the lubricating oil in the space between the measuring instrument 3 and the light-emitting instrument 4 through the observation port 15 , and can also visually observe the lighting effect of the light-emitting instrument 4 in the cavity 11 .

[0044] Furthermore, it is preferred that the length dimension of the observation port 15 is equal to the radial dimension of the portion of the measuring instrument 3 located in the cavity 11, the width dimension of the observation port 15 is equal to the spacing between the measuring instrument 3 and the light-emitting instrument 4, and the observation port 15 is aligned with the measuring area between the measuring instrument 3 and the light-emitting instrument 4 along its opening direction.

[0045] At this time, the staff can more intuitively observe the flow of the lubricating oil in the space between the measuring instrument 3 and the light-emitting instrument 4 through the observation port 15 , and can also more intuitively observe the lighting effect of the light-emitting instrument 4 in the cavity 11 .

[0046] The two observation windows 5 correspond to the two observation ports 15 one by one. The observation windows 5 are fixedly mounted on the measuring body 1 through the corresponding observation ports 15, and the staff can observe the situation inside the cavity 11 through the observation windows 5 and the observation ports 15. After the observation windows 5 are fixedly mounted on the measuring body 1, the observation windows 5 can fill the corresponding observation ports 15, and at this time, the surface of the observation windows 5 close to the cavity 11 is flush with the inner wall of the cavity 11 close to the observation ports 15. In this embodiment, since the observation windows 5 are common prior art, they are not described here in detail, and are only briefly shown in the drawings.

[0047] Reference Figure 2 and Figure 4 , further, the flow opening 12 is preferably a square hole, and its shape is formed by the superposition of the square area 121 and the circular area 122, and the center points of the circular area 122 and the square area 121 coincide. Among them, the radial dimension of the circular area 122 is equal to the inner diameter dimension of the pipeline 2. After the corresponding pipeline 2 is installed, the axis of the circular area 122 coincides with the axis of the pipeline 2, and the inner wall of the flow opening 12 in the circular area 122 will be flush with the inner wall of the pipeline 2; the length dimension of the square area 121 is equal to the outer diameter dimension of the pipeline 2, the width dimension of the square area 121 is equal to the radial dimension of the part of the measuring instrument 3 located in the cavity 11, the length direction of the square area 121 is parallel to the height direction of the measuring body 1, and the inner wall of the flow opening 12 on the side of the square area 121 close to the second installation port 14 is flush with the inner wall of the cavity 11 close to the second installation port 14.

[0048] Reference Figure 2 and Figure 3 Furthermore, in order to facilitate the lubricating oil to enter and exit the cavity 11 through the circular area 122 of the circulation port 12, it is preferred that the measuring body 1 has a flaring design on the inner wall of the circular area 122 of the circulation port 12 in the direction close to the cavity 11, and the minimum radial dimension of the circular area 122 is equal to the inner diameter of the pipe 2. At this time, the lubricating oil can be quickly diffused and quickly gathered in the process of entering and exiting the cavity 11 through the circular area 122 of the circulation port 12, so as to further improve the smoothness of the lubricating oil flowing through the cavity 11.

[0049] Reference Figure 3 and Figure 4Furthermore, in order to facilitate the lubricating oil to enter and exit the cavity 11 through the square area 121 of the circulation port 12, and to facilitate the installation and fixation of the pipeline 2 through the circulation port 12, it is preferred that two transition grooves 21 are provided on one end of the pipeline 2 for fixed connection with the measuring body 1.

[0050] The overall shape of the transition groove 21 is a combination of two plate-like structures with triangular cross-sections, and its maximum width is equal to the width of the square area 121; after the pipeline 2 is installed, the cross-sectional area of ​​the transition groove 21 for the flow of lubricating oil gradually increases toward the flow port 12, and its end close to the flow port 12 will be completely adapted to and communicate with the space outside the circular area 122 of the square area 121, and the lubricating oil will be diverted under the action of the transition groove 21, and the flow direction of the two streams of lubricating oil will be flared toward the flow port 12.

[0051] At this time, under the action of gravity, the lubricating oil in the pipeline 2 will mainly enter and exit the cavity 11 through the transition groove 21 at the bottom and then through the bottom of the square area 121 of the flow port 12. The transition groove 21 can make the process of the lubricating oil entering and exiting the cavity 11 through the square area 121 smoother.

[0052] Reference Figure 2 and Figure 5 Furthermore, it is preferred that four first transition surfaces 16 are provided between the area of ​​the inner wall of the cavity 11 in the radial direction close to the second mounting port 14 and the inner wall of one end of the cavity 11 close to the second mounting port 14, the square area 121 has second transition surfaces 17 at the corners of the inner wall outside the circular area 122, and one end of the pipe 2 has two third transition surfaces 22 on the groove walls on both sides of the transition groove 21, and the first transition surface 16, the second transition surface 17 and the third transition surface 22 are all arcuate surfaces.

[0053] The first transition surface 16 extends along an arc trajectory outside the cavity 11, and one end along the arc trajectory is connected to the wall of the adjacent observation port 15, and the other end along the arc trajectory is connected to one end of the adjacent second transition surface 17; one end of the second transition surface 17 away from the adjacent first transition surface 16 is connected to one end of the adjacent third transition surface 22, and one end of the third transition surface 22 away from the adjacent second transition surface 17 is connected to the inner wall of the corresponding pipe 2.

[0054] At this time, the first transition surface 16, the second transition surface 17 and the third transition surface 22 can make the process of the lubricating oil passing through the square area 121 of the flow port 12 in and out of the cavity 11 smoother, and at the same time can effectively reduce the probability of the abrasive particles in the lubricating oil being blocked and staying at the corners inside the pipeline 2 and the measuring body 1 during the flow process, thereby effectively eliminating dead corners, and further reducing the probability of the abrasive particles staying in the cavity 11 affecting the normal measurement and measurement results.

[0055] The implementation principle of a flow cell structure for measuring lubricating oil wear particles in the embodiment of the present application is as follows: After the lubricating oil flows into the cavity 11 through the pipe 2, it can mainly flow through the space between the measuring instrument 3 and the light-emitting instrument 4, and the measuring instrument 3 can measure the abrasive content in the lubricating oil in real time while being illuminated by the light-emitting instrument 4. The staff can obtain the real-time data of the measurement in the background, and judge the quality of the lubricating oil by the measurement result, so that the lubricating oil can effectively lubricate the equipment; the condition of the lubricating oil inside the cavity 11 and the operation condition of the light-emitting instrument 4 can also be directly observed through the observation window 5, and the abrasive content in the cavity 11 and whether the light-emitting instrument 4 is operating normally can be timely known, so as to make corresponding operation adjustments in time according to different situations; When the lubricating oil enters and exits the cavity 11, it can maintain smooth flow and is not easily blocked at the corners of the internal structure, which can fully and effectively achieve no dead angles, thereby effectively reducing the probability of abrasive particles staying inside the structure and affecting the normal operation of the structure.

[0056] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flow cell structure for measuring lubricating oil wear particles, characterized in that: It includes a measuring body (1), two pipes (2), a measuring instrument (3) and a light-emitting instrument (4); The measuring body (1) is in the form of a rectangular parallelepiped structure as a whole, and has a cylindrical cavity (11) in the center thereof, and the axis of the cavity (11) is parallel to the height direction of the measuring body (1); both sides of the measuring body (1) are provided with flow openings (12) in a direction perpendicular to the corresponding side faces, and the two flow openings (12) are aligned in the same radial direction of the cavity (11); The two pipes (2) are respectively arranged on both sides of the measuring body (1), the pipes (2) are connected to the cavity (11) through the corresponding flow openings (12), and the inner wall of the pipe (2) is flush with the wall of the flow opening (12); The measuring body (1) has a first mounting opening (13) and a second mounting opening (14) respectively centrally formed on two side surfaces along its height direction, the first mounting opening (13) being located above the second mounting opening (14), and both the first mounting opening (13) and the second mounting opening (14) being in communication with the cavity (11); The measuring instrument (3) is arranged on the measuring body (1) through the first mounting opening (13), the first mounting opening (13) is sealed, and a portion of the first mounting opening (13) is located in the cavity (11); The light emitting instrument (4) is arranged on the measuring body (1) through the second mounting opening (14), the second mounting opening (14) is sealed, and the surface of the portion located in the second mounting opening (14) is flush with the inner wall of the cavity (11).

2. A flow cell structure for measuring lubricating oil wear particles according to claim 1, characterized in that: The flow opening (12) is a square-circular hole formed by superimposing a square area (121) and a circular area (122); The length direction of the square area (121) is parallel to the height direction of the measuring body (1), the length dimension of the square area (121) is equal to the outer diameter dimension of the pipe (2), the width dimension of the square area (121) is equal to the dimension of the portion of the measuring instrument (3) located in the cavity (11), and the radial dimension of the circular area (122) is equal to the inner diameter dimension of the pipe (2).

3. A flow cell structure for measuring lubricating oil wear particles according to claim 2, characterized in that: The circular area (122) is expanded along its own axial direction in a direction close to the cavity (11), and the minimum radial dimension of the circular area (122) is equal to the inner diameter of the pipe (2).

4. A flow cell structure for measuring lubricating oil wear particles according to claim 2, characterized in that: Two transition grooves (21) adapted to the square area (121) are provided at one end of the pipe (2) close to the flow port (12); the length of the transition groove (21) is equal to the width of the square area (121); and the transition groove (21) is adapted to and communicates with a portion of the square area (121) that exceeds the circular area (122).

5. A flow cell structure for measuring lubricating oil wear particles according to claim 4, characterized in that: An arc-shaped first transition surface (16) is provided between an inner wall of the cavity (11) in a radial direction and an inner wall of the cavity (11) at one end close to the second mounting opening (14).

6. A flow cell structure for measuring lubricating oil wear particles according to claim 5, characterized in that: The measuring body (1) has a second transition surface (17) on the inner wall of the square area (121) near the second mounting opening (14), and the pipe (2) has a third transition surface (22) on the groove wall of the transition groove (21); two ends of the second transition surface (17) are respectively connected to one end of the first transition surface (16) and one end of the third transition surface (22), and the other end of the third transition surface (22) is connected to the inner wall of the pipe (2).

7. A flow cell structure for measuring lubricating oil wear particles according to claim 1, characterized in that: It also comprises two observation windows (5); the measuring body (1) is provided with observation ports (15) on both sides thereof perpendicular to the direction in which the flow port (12) is opened, the two observation ports (15) are both connected to the cavity (11), the observation windows (5) are installed in the corresponding observation ports (15), and the surface of the observation windows (5) close to the cavity (11) is flush with the inner wall of the cavity (11).

8. A flow cell structure for measuring lubricating oil wear particles according to claim 7, characterized in that: The observation port (15) is located at a position of the measurement body (1) close to the second mounting port (14).

9. A flow cell structure for measuring lubricating oil wear particles according to claim 8, characterized in that: An inner wall of one side of the observation port (15) close to the second mounting port (14) is flush with an inner wall of one end of the cavity (11) close to the second mounting port (14).

10. A flow cell structure for measuring lubricating oil wear particles according to claim 9, characterized in that: The length dimension of the observation port (15) is equal to the dimension of the portion of the measuring instrument (3) located in the cavity (11), and the width dimension of the observation port (15) is equal to the distance between the measuring instrument (3) and the light emitting instrument (4).

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