Oil particle detector

Abstract

The utility model belongs to the technical field of oil particle detection, and discloses an oil particle detector. The oil particle detector comprises an oil pipe assembly and a detection mechanism. The oil pipe assembly comprises an oil inlet sealing head, an oil outlet sealing head and a connecting shaft, the oil inlet sealing head and the oil outlet sealing head are connected to the two ends of the connecting shaft respectively, and the interiors of the oil inlet sealing head, the connecting shaft and the oil outlet sealing head sequentially penetrate through to form a liquid flow pipeline. First sealing pieces are respectively arranged between the oil inlet sealing head and the connecting shaft and between the oil outlet sealing head and the connecting shaft; the detection mechanism comprises lens sets, the lens sets are arranged in the connecting shaft, a detection slit is formed between the lens sets, oil can sequentially pass through the oil inlet sealing head, the detection slit and the oil outlet sealing head, and second sealing pieces are arranged between the lens sets and the oil inlet sealing head and between the lens sets and the oil outlet sealing head respectively. According to the oil particle detector, the sealing performance can be enhanced, oil leakage or leakage is avoided, the detection precision and accuracy are ensured, and the service life of the oil particle detector is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oil particle detection, in particular to an oil particle detector. Background Art

[0002] The oil particle detector is an important liquid analysis device, which has the characteristics of high precision, versatility and portability, and plays an important role in the fields of industrial production, automobile maintenance and so on.

[0003] The oil particle detector is used to detect the size, quantity and grade of various mechanical wear particles in the oil, and judge the operating conditions of each machine and understand the wear degree of the engine according to the particle size and quantity, so as to take corresponding preventive measures in advance.

[0004] Due to the influence of conditions such as high pressure and vacuum, the oil in the existing oil particle detector is likely to leak at the connection, which affects the detection accuracy and precision, and also causes damage to the oil particle detector. Content of the Utility Model

[0005] The purpose of the utility model is to provide an oil particle detector, which is used to enhance the sealing performance of the oil particle detector, avoid the leakage of oil at the connection, so as to ensure the detection accuracy and precision and improve the service life of the oil particle detector.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The oil particle detector includes:

[0008] A tubing assembly, which includes an inlet oil seal head, an outlet oil seal head and a connecting shaft. The inlet oil seal head and the outlet oil seal head are respectively connected to both ends of the connecting shaft. A liquid flow pipeline for oil flow is formed by sequentially penetrating through the inlet oil seal head, the connecting shaft and the outlet oil seal head. First sealing members are respectively arranged between the inlet oil seal head and the connecting shaft and between the outlet oil seal head and the connecting shaft.

[0009] A detection mechanism, which includes a lens group. The lens group is arranged in the connecting shaft. A detection slit is arranged between the lens groups. The oil can sequentially pass through the inlet oil seal head, the detection slit and the outlet oil seal head. Second sealing members are respectively arranged between the lens group and the inlet oil seal head and between the lens group and the outlet oil seal head.

[0010] As an optional solution of the oil particle detector, the lens group includes two relatively arranged plane mirrors, the detection slit is located on a detection plate, and the detection plate is clamped between the two plane mirrors.

[0011] As an alternative to the oil particle detector, a third seal is provided between the plane mirror and the connecting shaft.

[0012] As an alternative to the oil particle detector, the detection mechanism further includes a light emitting component and a light receiving component. The light emitting component is used to emit detection light, which enters the light receiving component through the lens group.

[0013] As an alternative to the oil particle detector, the light emitting component includes a first sleeve, a light emitting element, and a first lens. The first sleeve extends along the direction of the optical path. The light emitting element and the first lens are arranged inside the first sleeve. The light emitting element can move along the direction of the optical path. The first lens is used to adjust the light generated by the light emitting element into parallel light.

[0014] As an alternative to the oil particle detector, the light emitting element is screwed to the inner wall of the first sleeve through a first fixing seat, and the first lens is screwed to the first sleeve through a second fixing seat.

[0015] As an alternative to the oil particle detector, the light emitting component further includes a cylindrical lens. The cylindrical lens is located at one end of the first sleeve. The light passing through the first lens can pass through the cylindrical lens, so that the light is adjusted into a strip shape parallel to the detection slit.

[0016] As an alternative to the oil particle detector, the detection mechanism further includes a second lens located on the optical path. The second lens is used to converge the light passing through the cylindrical lens.

[0017] As an alternative to the oil particle detector, the detection mechanism further includes a sealing block located on the optical path. The sealing block is screwed to the connecting shaft. A fourth seal is provided between the sealing block and the connecting shaft. A fifth seal is provided between the sealing block and the lens group. The light passing through the second lens can pass through the sealing block and enter the lens group.

[0018] As an alternative to the oil particle detector, the light receiving component includes a photoelectric receiving circuit board. The photoelectric receiving circuit board is located on the side of the connecting shaft away from the light emitting component. The photoelectric receiving circuit board is detachably connected to the connecting shaft. The photoelectric receiving circuit board is used to receive the light emitted from the detection slit.

[0019] Beneficial effects:

[0020] In the present utility model, the first seal can effectively prevent external dust particles from entering the connecting shaft, thereby avoiding the influence of external particles on the accuracy of the measurement results; on the other hand, it can also prevent the internal oil pressure of the connecting shaft from being too high, causing leakage or spillage, which affects the use of the oil particle detector and improves the service life. Further, second seals are respectively provided between the lens group and the oil inlet sealing head and the oil outlet sealing head. The second seal can ensure that the oil completely passes through the detection slit, prevent oil leakage or leakage caused by excessive internal oil pressure, thereby effectively ensuring the detection accuracy and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the front view of the oil particle detector provided by the embodiment of the present utility model;

[0022] Figure 2 is the cross-sectional view of the oil particle detector provided by the embodiment of the present utility model;

[0023] Figure 3 is the cross-sectional view of the oil pipe assembly provided by the embodiment of the present utility model;

[0024] Figure 4 is the exploded view of the oil pipe assembly provided by the embodiment of the present utility model;

[0025] Figure 5 is the cross-sectional view of a partial structure of the detection assembly provided by the embodiment of the present utility model;

[0026] Figure 6 is the exploded view of a partial structure of the detection assembly provided by the embodiment of the present utility model

[0027] Figure 7 is the cross-sectional view of the fixed cylinder and the second lens provided by the embodiment of the present utility model

[0028] Figure 8 is the exploded view of the fixed cylinder and the second lens provided by the embodiment of the present utility model.

[0029] In the figure:

[0030] 1. Oil pipe assembly; 101. Oil inlet sealing head; 102. Oil outlet sealing head; 103. Connecting shaft; 104. First seal; 105. Second seal; 106. Third seal; 107. Fourth seal; 108. Fifth seal; 109. Detection plate; 110. Oil inlet pipe joint; 111. Oil outlet pipe joint;

[0031] 20. Optical emission component; 201. Light-emitting element; 202. First fixing base; 203. Limiting block; 204. Photoelectric emission circuit board; 205. First sleeve; 206. Adjusting block; 207. Fixing block; 208. Second fixing base; 209. First lens; 210. Cylindrical lens; 211. Fixing cylinder; 212. Second lens; 213. Sealing block;

[0032] 30. Lens group; 31. Plane mirror;

[0033] 40. Optical reception component; 41. Photoelectric reception circuit board;

[0034] 501. Second sleeve; 502. Front cover; 503. Rear cover. Specific embodiments

[0035] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0036] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0038] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for convenience of description and simplifying the operations, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0039] The oil particle detector mainly works based on the principle of light resistance (light shielding). When the oil to be measured flows through an orifice with a very small cross-section, the optical glass on both sides of the orifice allows the light of the laser to pass through. If there are no particles in the oil, the optical signal received by the photodetector remains stable, and the output voltage signal is also constant. However, when there are particles in the oil, these particles will block the light, resulting in a decrease in the optical signal received by the photodetector, thereby generating a pulsed electrical signal. The number of pulsed electrical signals can correspond to the number of particles, and the amplitude of the pulsed signal can correspond to the size of the particles. By detecting and grading various particle sizes and quantities in the oil with the oil particle detector, the performance of the oil can be understood in a timely manner, thus providing help for taking corresponding preventive measures in advance.

[0040] Please refer to the Figure 1 - Figure 4 drawings. The oil particle detector involved in this embodiment is based on the above working principle. Specifically, the oil particle detector includes a tubing assembly 1 and a detection mechanism. Among them, the tubing assembly 1 includes an inlet sealing head 101, an outlet sealing head 102, and a connecting shaft 103. The inlet sealing head 101 and the outlet sealing head 102 are respectively connected to both ends of the connecting shaft 103. A liquid flow channel is formed by passing through the inlet sealing head 101, the connecting shaft 103, and the outlet sealing head 102 in sequence. First seals 104 are respectively provided between the inlet sealing head 101 and the connecting shaft 103 and between the outlet sealing head 102 and the connecting shaft 103; the detection mechanism includes a lens group 30. The lens group 30 is provided in the connecting shaft 103. A detection slit is provided between the lens groups 30. The oil can pass through the inlet sealing head 101, the detection slit, and the outlet sealing head 102 in sequence. Second seals 105 are respectively provided between the lens group 30 and the inlet sealing head 101 and between the lens group 30 and the outlet sealing head 102.

[0041] In this embodiment, the oil pipe assembly 1 further includes an oil inlet pipe joint 110 and an oil outlet pipe joint 111. The structures of the oil inlet pipe joint 110 and the oil outlet pipe joint 111 can be the same or different. In this embodiment, both the oil inlet pipe joint 110 and the oil outlet pipe joint 111 are L-shaped pipe joints. Among them, the oil inlet pipe joint 110 is screwed to the oil inlet sealing head 101, and the oil outlet pipe joint 111 is screwed to the oil outlet sealing head 102. The oil inlet sealing head 101 and the oil outlet sealing head 102 are respectively screwed to both ends of the connecting shaft 103, so that the oil inlet pipe joint 110, the oil inlet sealing head 101, the connecting shaft 103, the oil outlet sealing head 102 and the oil outlet pipe joint 111 are connected in sequence along the vertical direction. Oil can enter from the oil inlet pipe joint 110, flow through the liquid flow pipeline, and flow out from the oil outlet pipe joint 111.

[0042] In this embodiment, first seals 104 are respectively provided between the oil inlet sealing head 101 and the connecting shaft 103 and between the oil outlet sealing head 102 and the connecting shaft 103. The first seals 104 are sealing rings. Among them, the oil inlet sealing head 101 and the oil outlet sealing head 102 are provided with external threads, and the connecting shaft 103 is provided with internal threads. The first seals 104 are respectively sleeved on the threaded ends of the oil inlet sealing head 101 and the oil outlet sealing head 102. The first seals 104 can effectively prevent external dust particles from entering the connecting shaft 103, thereby avoiding the influence of external particles on the accuracy of the measurement results. On the other hand, it can also prevent the internal oil pressure of the connecting shaft 103 from being too high, resulting in leakage or overflow, which affects the use of the oil particle detector and improves the service life.

[0043] Further, the detection mechanism can detect the oil flowing through the detection slit based on the principle of light resistance (light shielding). Specifically, the oil entering the connecting shaft 103 gradually flows into the detection slit, and the light passing through the lens group 30 will pass through the oil. The lens group 30 can ensure that the oil passes through, and at the same time, it can also ensure that the oil always flows along the detection slit. In this embodiment, second seals 105 are respectively provided between the lens group 30 and the oil inlet sealing head 101 and between the lens group 30 and the oil outlet sealing head 102. Specifically, the second seals 105 are also sealing rings. The diameter of the second seals 105 is smaller than that of the first seals 104. The second seals 105 are arranged on the contact end faces between the oil inlet sealing head 101 and the lens group 30 and between the oil outlet sealing head 102 and the lens group 30. The second seals 105 can ensure that the oil completely passes through the detection slit, prevent oil leakage or leakage caused by too high internal oil pressure, thereby effectively ensuring the detection accuracy and accuracy.

[0044] In this embodiment, the connecting shaft 103 is a four-way pipe fitting, in which oil passes through in the vertical direction and light passes through in the horizontal direction. This oil particle detector can realize the integrated measurement of the optical path and the oil path, with a compact overall structure and small occupied space.

[0045] Optionally, the lens group 30 includes two relatively arranged plane mirrors 31. The detection slit is located on the detection plate 109, and the detection plate 109 is clamped between the two plane mirrors 31.

[0046] In this embodiment, the lens group 30 can ensure that light passes through smoothly. Specifically, light passes through the plane mirror 31 on one side and enters the detection slit of the detection plate 109. The detection plate 109 is a plate made of stainless steel material, and the detection slit is a strip-shaped narrow slit along the vertical direction. The oil forms a strip-shaped flow state through the action of the detection slit, and the light continues to enter and pass through the plane mirror 31 on the other side after passing through the oil in the detection slit.

[0047] Furthermore, a reflective film can be attached to the plane mirror 31 on the incident side to reflect the light that can affect the detection result to ensure the accuracy of the detection result.

[0048] Optionally, a third seal 106 is provided between the plane mirror 31 and the connecting shaft 103.

[0049] In this embodiment, an annular groove for embedding the third seal 106 is provided on the inner wall surface of the connecting shaft 103. The third seal 106 is also an O-ring. The third seal 106 is clamped between the plane mirror 31 and the connecting shaft 103. The third seal 106 can not only prevent dust particles from entering the detection slit, but also prevent oil from leaking into the optical path through the detection slit, thereby damaging the oil particle detector.

[0050] Please refer to the append Figure 2 , optionally, the detection mechanism further includes a light emitting component 20 and a light receiving component 40. The light emitting component 20 is used to emit detection light and enter the light receiving component 40 through the lens group 30.

[0051] In this embodiment, the light for detection is emitted by the light emitting component 20. The light enters the light receiving component 40 through the lens group 30 and the detection slit. The light receiving component 40 receives the optical signal and realizes the conversion of the pulse electrical signal to complete the detection. The light emitting component 20 and the light receiving component 40 can both adopt existing structures, and the specific optoelectronic conversion principle of the two is not elaborated in this embodiment.

[0052] Please refer to the append Figure 2 , append Figure 5 and append Figure 6, optionally, the light emitting component 20 includes a first sleeve 205, a light emitting element 201, and a first lens 209. The first sleeve 205 extends along the direction of the optical path. The light emitting element 201 and the first lens 209 are disposed inside the first sleeve 205. The light emitting element 201 can move along the direction of the optical path. The first lens 209 is used to adjust the light generated by the light emitting element 201 into parallel light. The light emitting element 201 is screwed to the inner wall of the first sleeve 205 through a first fixing seat 202, and the first lens 209 is screwed to the first sleeve 205 through a second fixing seat 208.

[0053] In this embodiment, a second sleeve 501 is further provided on the connecting shaft 103. The second sleeve 501 can be connected to the connecting shaft 103 by means of clamping or screwing. The second sleeve 501 extends along the direction of the optical path. The second sleeve 501 is used to provide protection for the entire optical path.

[0054] The first sleeve 205 is fixed inside the second sleeve 501. The first sleeve 205 extends along the direction of the optical path. The first sleeve 205 is provided with internal threads inside. The light emitting element 201 is clamped in the limiting groove of the first fixing seat 202. The light emitting element 201 is used to generate detection light. The outer circumference of the first fixing seat 202 is provided with external threads. The first fixing seat 202 is screwed to the internal threads of the first sleeve 205 through the external threads. By rotating the first fixing seat 202, the position of the light emitting element 201 inside the first sleeve 205 can be adjusted. A limiting block 203 is also screwed inside the first sleeve 205. By rotating the first fixing seat 202 to adjust the axial position of the first fixing seat 202 relative to the first sleeve 205, the limiting block 203 is used to limit the first fixing seat 202. When the first fixing seat 202 abuts against the limiting block 203, the position adjustment is completed. The limiting block 203 is provided with a cavity in the direction of the optical path to allow the light generated by the light emitting element 201 to pass through.

[0055] Further, a second fixing seat 208 is also screwed inside the second sleeve 501. The first lens 209 is bonded to the second fixing seat 208 through ultraviolet glue. The second fixing seat 208 is disposed on the side of the limiting block 203 away from the first fixing seat 202 and is spaced apart from the limiting block 203 by a certain distance. The first lens 209 is a small-sized convex lens. The first lens 209 has a preliminary beam focusing effect and can adjust the divergent detection light generated by the light emitting element 201 into parallel light and emit it backward.

[0056] In this embodiment, the light emitting component 20 further includes a photoelectric emission circuit board 204. The photoelectric emission circuit board 204 is electrically connected to the light emitting element 201 through a wire. The photoelectric emission circuit board 204 is used to control the optical parameters of the detection light generated by the light emitting element 201.

[0057] Optionally, the light emitting component 20 further includes a cylindrical lens 210. The cylindrical lens 210 is located at one end of the first sleeve 205, and the light passing through the first lens 209 can pass through the cylindrical lens 210 to adjust the light into a strip shape parallel to the detection slit.

[0058] In this embodiment, the light emitting component 20 further includes a fixing block 207 disposed inside the second sleeve 501. The fixing block 207 is of an annular structure and is sleeved on the outer periphery of the first sleeve 205. A cylindrical lens 210 is provided at one end of the fixing block 207 away from the first sleeve 205. The cylindrical lens 210 is bonded to the fixing block 207 by ultraviolet glue, and the fixing block 207 is fixed in the second sleeve 501 by fastening screws. The cylindrical lens 210 can be used to adjust the width of parallel light to adjust it into a strip shape that is parallel and adapted to the width of the detection slit.

[0059] The light emitting component 20 further includes an adjusting block 206 disposed inside the second sleeve 501. The adjusting block 206 is arranged in parallel with the fixing block 207 and is sleeved on the first sleeve 205 for fixing the first sleeve 205. By adjusting the position of the adjusting block 206, it is also convenient to adjust the position of the first sleeve 205 on the optical path, improving the convenience of adjustment.

[0060] Please refer to Appendix Figure 2 Appendix Figure 7 Appendix Figure 8 and Appendix

[0061] In this embodiment, the detection mechanism further includes a fixing cylinder 211 disposed inside the second sleeve 501. The fixing cylinder 211 is spaced from the cylindrical lens 210 by a certain distance. The light emitted from the cylindrical lens 210 can pass through the second lens 212 on the fixing cylinder 211. The second lens 212 is a biconvex lens, which is used to further adjust the width of the light and make the intensity of the light more concentrated, and is incident towards the detection slit to ensure that the light entering the detection slit has sufficient intensity to realize the detection of the oil fluid. The fixing cylinder 211 is of a cylindrical structure, and the fastening screw passes through the second sleeve 501 and presses against the fixing cylinder 211 to complete the fixation.

[0062] Optionally, the detection mechanism further includes a sealing block 213 located on the optical path. The sealing block 213 is screwed to the connecting shaft 103. A fourth seal 107 is provided between the sealing block 213 and the connecting shaft 103, and a fifth seal 108 is provided between the sealing block 213 and the lens group 30. The light passing through the second lens 212 can pass through the sealing block 213 and enter the lens group 30.

[0063] In this embodiment, both the fourth seal 107 and the fifth seal 108 are sealing rings. The fourth seal 107 is annularly arranged on the outer circumferential wall of the sealing block 213. Specifically, an annular limiting groove for accommodating the fourth seal 107 is provided on the outer circumferential wall of the sealing block 213. The fourth seal 107 can effectively prevent external dust particles from entering through the joint between the connecting shaft 103 and the second sleeve 501. At the same time, an annular limiting groove is also provided on the end face of the sealing block 213 in contact with the lens group 30. The fifth seal 108 is embedded in the end face of the sealing block 213. The fifth seal 108 can further prevent oil from entering the optical path and interfering with the light. The fourth seal 107 and the fifth seal 108 can further enhance the sealing effect of this oil particle detector and ensure the accuracy of detection.

[0064] Please continue to refer to the attached Figure 1 and the attached Figure 2 . Optionally, the light receiving assembly 40 includes a photoelectric receiving circuit board 41. The photoelectric receiving circuit board 41 is located on the side of the connecting shaft 103 away from the light emitting assembly 20. The photoelectric receiving circuit board 41 is detachably connected to the connecting shaft 103 and is used to receive the light emitted from the detection slit.

[0065] In this embodiment, the photoelectric receiving circuit board 41 is fixed to the outer wall of the connecting shaft 103 by threaded fasteners and is used to receive the light emitted through the detection slit. A front cover 502 is provided outside the photoelectric receiving circuit board 41 to seal the photoelectric receiving circuit board 41 and prevent external dust particles from affecting the measurement results. A rear cover 503 is provided at the other end of the oil particle detector relative to the front cover 502. The rear cover 503 is connected to the second sleeve 501 by threaded fasteners to close the second sleeve 501 and thus ensure the sealing performance. Of course, in other embodiments, the rear cover 503 can also be directly snapped onto the second sleeve 501 on the premise of ensuring the sealing performance.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Oil particle detector, characterized in that: include: An oil pipe assembly (1), the oil pipe assembly (1) comprising an oil inlet sealing head (101), an oil outlet sealing head (102) and a connecting shaft (103); the oil inlet sealing head (101) and the oil outlet sealing head (102) are respectively connected to two ends of the connecting shaft (103); the oil inlet sealing head (101), the connecting shaft (103) and the oil outlet sealing head (102) are sequentially penetrated to form a liquid flow pipeline for oil circulation; a first sealing member (104) is respectively provided between the oil inlet sealing head (101) and the connecting shaft (103) and between the oil outlet sealing head (102) and the connecting shaft (103); The detection mechanism comprises a lens group (30), the lens group (30) is arranged in the connecting shaft (103), a detection slit is arranged between the lens group (30), oil can pass through the oil inlet sealing head (101), the detection slit and the oil outlet sealing head (102) in sequence, and a second sealing member (105) is respectively arranged between the lens group (30) and the oil inlet sealing head (101) and the oil outlet sealing head (102).

2. The oil particle detector according to claim 1, characterized in that: The lens group (30) comprises two plane mirrors (31) arranged opposite to each other, the detection slit is located on a detection plate (109), and the detection plate (109) is sandwiched between the two plane mirrors (31).

3. The oil particle detector according to claim 2, characterized in that: A third sealing member (106) is provided between the plane mirror (31) and the connecting shaft (103).

4. The oil particle detector according to claim 1, characterized in that: The detection mechanism further comprises a light emitting component (20) and a light receiving component (40); the light emitting component (20) is used to emit detection light and enter the light receiving component (40) through the lens group (30).

5. The oil particle detector according to claim 4, characterized in that: The light emitting assembly (20) comprises a first sleeve (205), a light emitting member (201) and a first lens (209); the first sleeve (205) extends along the direction of the light path; the light emitting member (201) and the first lens (209) are arranged inside the first sleeve (205); the light emitting member (201) can move along the direction of the light path; and the first lens (209) is used to adjust the light generated by the light emitting member (201) into parallel light.

6. The oil particle detector according to claim 5, characterized in that: The light-emitting element (201) is screwed to the inner wall of the first sleeve (205) via a first fixing seat (202), and the first lens (209) is screwed to the first sleeve (205) via a second fixing seat (208).

7. The oil particle detector according to claim 6, characterized in that: The light emitting assembly (20) further comprises a cylindrical mirror (210), which is located at one end of the first sleeve (205). The light passing through the first lens (209) can pass through the cylindrical mirror (210), so that the light is adjusted to a strip shape parallel to the detection slit.

8. The oil particle detector according to claim 7, characterized in that: The detection mechanism also includes a second lens (212) located on the optical path, and the second lens (212) is used to converge the light passing through the cylindrical mirror (210).

9. The oil particle detector according to claim 8, characterized in that: The detection mechanism also includes a sealing block (213) located on the optical path, the sealing block (213) being threadedly connected to the connecting shaft (103), a fourth sealing member (107) being provided between the sealing block (213) and the connecting shaft (103), and a fifth sealing member (108) being provided between the sealing block (213) and the lens group (30), so that light passing through the second lens (212) can pass through the sealing block (213) and enter the lens group (30).

10. The oil particle detector according to claim 4, characterized in that: The optical receiving component (40) comprises a photoelectric receiving circuit board (41), the photoelectric receiving circuit board (41) is located on a side of the connecting shaft (103) away from the optical transmitting component (20), the photoelectric receiving circuit board (41) is detachably connected to the connecting shaft (103), and the photoelectric receiving circuit board (41) is used to receive light emitted from the detection slit.

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